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af969b14ae
This largely mechanical patch is preparation for a followup patch. For quite some time I've thought that it would be useful to call elf_backend_size_dynamic_sections even when no dynamic objects are seen by the linker. That's what this patch does, with some renaming. There are no functional changes to the linker, just a move of the dynobj test in bfd_elf_size_dynamic_sections to target backend functions, replacing the asserts/aborts already there. No doubt some of the current always_size_sections functions could be moved to size_dynamic_sections but I haven't made that change. Because both hooks are now always called, I have renamed always_size_sections to early_size_sections and size_dynamic_sections to late_size_sections. I condisdered calling late_size_sections plain size_sections, since this is the usual target dynamic section sizing hook, but decided that searching the sources for "size_sections" would then hit early_size_sections and other functions.
5533 lines
155 KiB
C
5533 lines
155 KiB
C
/* Alpha specific support for 64-bit ELF
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Copyright (C) 1996-2024 Free Software Foundation, Inc.
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Contributed by Richard Henderson <rth@tamu.edu>.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/* We need a published ABI spec for this. Until one comes out, don't
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assume this'll remain unchanged forever. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "ecoff-bfd.h"
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#include "elf/alpha.h"
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#define ALPHAECOFF
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#define NO_COFF_RELOCS
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#define NO_COFF_SYMBOLS
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#define NO_COFF_LINENOS
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/* Get the ECOFF swapping routines. Needed for the debug information. */
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#include "coff/internal.h"
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#include "coff/sym.h"
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#include "coff/symconst.h"
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#include "coff/ecoff.h"
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#include "coff/alpha.h"
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#include "aout/ar.h"
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#include "libcoff.h"
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#include "libecoff.h"
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#define ECOFF_64
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#include "ecoffswap.h"
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/* Instruction data for plt generation and relaxation. */
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#define OP_LDA 0x08U
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#define OP_LDAH 0x09U
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#define OP_LDQ 0x29U
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#define OP_BR 0x30U
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#define OP_BSR 0x34U
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#define INSN_LDA (OP_LDA << 26)
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#define INSN_LDAH (OP_LDAH << 26)
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#define INSN_LDQ (OP_LDQ << 26)
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#define INSN_BR (OP_BR << 26)
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#define INSN_ADDQ 0x40000400
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#define INSN_RDUNIQ 0x0000009e
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#define INSN_SUBQ 0x40000520
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#define INSN_S4SUBQ 0x40000560
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#define INSN_UNOP 0x2ffe0000
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#define INSN_JSR 0x68004000
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#define INSN_JMP 0x68000000
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#define INSN_JSR_MASK 0xfc00c000
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#define INSN_A(I,A) (I | ((unsigned) A << 21))
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#define INSN_AB(I,A,B) (INSN_A (I, A) | (B << 16))
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#define INSN_ABC(I,A,B,C) (INSN_A (I, A) | (B << 16) | C)
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#define INSN_ABO(I,A,B,O) (INSN_A (I, A) | (B << 16) | ((O) & 0xffff))
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#define INSN_AD(I,A,D) (INSN_A (I, A) | (((D) >> 2) & 0x1fffff))
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/* PLT/GOT Stuff */
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/* Set by ld emulation. Putting this into the link_info or hash structure
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is simply working too hard. */
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#ifdef USE_SECUREPLT
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bool elf64_alpha_use_secureplt = true;
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#else
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bool elf64_alpha_use_secureplt = false;
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#endif
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#define OLD_PLT_HEADER_SIZE 32
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#define OLD_PLT_ENTRY_SIZE 12
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#define NEW_PLT_HEADER_SIZE 36
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#define NEW_PLT_ENTRY_SIZE 4
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#define PLT_HEADER_SIZE \
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(elf64_alpha_use_secureplt ? NEW_PLT_HEADER_SIZE : OLD_PLT_HEADER_SIZE)
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#define PLT_ENTRY_SIZE \
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(elf64_alpha_use_secureplt ? NEW_PLT_ENTRY_SIZE : OLD_PLT_ENTRY_SIZE)
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#define MAX_GOT_SIZE (64*1024)
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so"
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/* Used to implement multiple .got subsections. */
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struct alpha_elf_got_entry
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{
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struct alpha_elf_got_entry *next;
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/* Which .got subsection? */
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bfd *gotobj;
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/* The addend in effect for this entry. */
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bfd_vma addend;
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/* The .got offset for this entry. */
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int got_offset;
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/* The .plt offset for this entry. */
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int plt_offset;
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/* How many references to this entry? */
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int use_count;
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/* The relocation type of this entry. */
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unsigned char reloc_type;
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/* How a LITERAL is used. */
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unsigned char flags;
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/* Have we initialized the dynamic relocation for this entry? */
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unsigned char reloc_done;
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/* Have we adjusted this entry for SEC_MERGE? */
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unsigned char reloc_xlated;
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};
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struct alpha_elf_reloc_entry
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{
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struct alpha_elf_reloc_entry *next;
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/* Which .reloc section? */
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asection *srel;
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/* Which section this relocation is against? */
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asection *sec;
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/* How many did we find? */
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unsigned long count;
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/* What kind of relocation? */
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unsigned int rtype;
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};
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struct alpha_elf_link_hash_entry
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{
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struct elf_link_hash_entry root;
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/* External symbol information. */
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EXTR esym;
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/* Cumulative flags for all the .got entries. */
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int flags;
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/* Contexts in which a literal was referenced. */
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#define ALPHA_ELF_LINK_HASH_LU_ADDR 0x01
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#define ALPHA_ELF_LINK_HASH_LU_MEM 0x02
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#define ALPHA_ELF_LINK_HASH_LU_BYTE 0x04
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#define ALPHA_ELF_LINK_HASH_LU_JSR 0x08
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#define ALPHA_ELF_LINK_HASH_LU_TLSGD 0x10
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#define ALPHA_ELF_LINK_HASH_LU_TLSLDM 0x20
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#define ALPHA_ELF_LINK_HASH_LU_JSRDIRECT 0x40
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#define ALPHA_ELF_LINK_HASH_LU_PLT 0x38
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#define ALPHA_ELF_LINK_HASH_TLS_IE 0x80
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/* Used to implement multiple .got subsections. */
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struct alpha_elf_got_entry *got_entries;
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/* Used to count non-got, non-plt relocations for delayed sizing
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of relocation sections. */
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struct alpha_elf_reloc_entry *reloc_entries;
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};
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/* Alpha ELF linker hash table. */
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struct alpha_elf_link_hash_table
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{
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struct elf_link_hash_table root;
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/* The head of a list of .got subsections linked through
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alpha_elf_tdata(abfd)->got_link_next. */
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bfd *got_list;
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/* The most recent relax pass that we've seen. The GOTs
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should be regenerated if this doesn't match. */
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int relax_trip;
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};
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/* Look up an entry in a Alpha ELF linker hash table. */
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#define alpha_elf_link_hash_lookup(table, string, create, copy, follow) \
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((struct alpha_elf_link_hash_entry *) \
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elf_link_hash_lookup (&(table)->root, (string), (create), \
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(copy), (follow)))
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/* Traverse a Alpha ELF linker hash table. */
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#define alpha_elf_link_hash_traverse(table, func, info) \
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(elf_link_hash_traverse \
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(&(table)->root, \
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(bool (*) (struct elf_link_hash_entry *, void *)) (func), \
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(info)))
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/* Get the Alpha ELF linker hash table from a link_info structure. */
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#define alpha_elf_hash_table(p) \
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((is_elf_hash_table ((p)->hash) \
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&& elf_hash_table_id (elf_hash_table (p)) == ALPHA_ELF_DATA) \
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? (struct alpha_elf_link_hash_table *) (p)->hash : NULL)
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/* Get the object's symbols as our own entry type. */
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#define alpha_elf_sym_hashes(abfd) \
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((struct alpha_elf_link_hash_entry **)elf_sym_hashes(abfd))
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/* Should we do dynamic things to this symbol? This differs from the
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generic version in that we never need to consider function pointer
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equality wrt PLT entries -- we don't create a PLT entry if a symbol's
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address is ever taken. */
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static inline bool
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alpha_elf_dynamic_symbol_p (struct elf_link_hash_entry *h,
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struct bfd_link_info *info)
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{
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return _bfd_elf_dynamic_symbol_p (h, info, 0);
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}
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/* Create an entry in a Alpha ELF linker hash table. */
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static struct bfd_hash_entry *
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elf64_alpha_link_hash_newfunc (struct bfd_hash_entry *entry,
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struct bfd_hash_table *table,
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const char *string)
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{
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struct alpha_elf_link_hash_entry *ret =
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(struct alpha_elf_link_hash_entry *) entry;
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/* Allocate the structure if it has not already been allocated by a
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subclass. */
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if (ret == (struct alpha_elf_link_hash_entry *) NULL)
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ret = ((struct alpha_elf_link_hash_entry *)
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bfd_hash_allocate (table,
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sizeof (struct alpha_elf_link_hash_entry)));
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if (ret == (struct alpha_elf_link_hash_entry *) NULL)
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return (struct bfd_hash_entry *) ret;
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/* Call the allocation method of the superclass. */
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ret = ((struct alpha_elf_link_hash_entry *)
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_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
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table, string));
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if (ret != (struct alpha_elf_link_hash_entry *) NULL)
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{
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/* Set local fields. */
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memset (&ret->esym, 0, sizeof (EXTR));
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/* We use -2 as a marker to indicate that the information has
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not been set. -1 means there is no associated ifd. */
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ret->esym.ifd = -2;
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ret->flags = 0;
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ret->got_entries = NULL;
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ret->reloc_entries = NULL;
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}
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return (struct bfd_hash_entry *) ret;
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}
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/* Create a Alpha ELF linker hash table. */
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static struct bfd_link_hash_table *
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elf64_alpha_bfd_link_hash_table_create (bfd *abfd)
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{
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struct alpha_elf_link_hash_table *ret;
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size_t amt = sizeof (struct alpha_elf_link_hash_table);
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ret = (struct alpha_elf_link_hash_table *) bfd_zmalloc (amt);
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if (ret == (struct alpha_elf_link_hash_table *) NULL)
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return NULL;
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if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
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elf64_alpha_link_hash_newfunc,
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sizeof (struct alpha_elf_link_hash_entry),
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ALPHA_ELF_DATA))
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{
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free (ret);
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return NULL;
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}
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return &ret->root.root;
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}
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/* Alpha ELF follows MIPS ELF in using a special find_nearest_line
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routine in order to handle the ECOFF debugging information. */
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struct alpha_elf_find_line
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{
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struct ecoff_debug_info d;
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struct ecoff_find_line i;
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};
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/* We have some private fields hanging off of the elf_tdata structure. */
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struct alpha_elf_obj_tdata
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{
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struct elf_obj_tdata root;
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/* For every input file, these are the got entries for that object's
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local symbols. */
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struct alpha_elf_got_entry ** local_got_entries;
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/* For every input file, this is the object that owns the got that
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this input file uses. */
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bfd *gotobj;
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/* For every got, this is a linked list through the objects using this got */
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bfd *in_got_link_next;
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/* For every got, this is a link to the next got subsegment. */
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bfd *got_link_next;
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/* For every got, this is the section. */
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asection *got;
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/* For every got, this is it's total number of words. */
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int total_got_size;
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/* For every got, this is the sum of the number of words required
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to hold all of the member object's local got. */
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int local_got_size;
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/* Used by elf64_alpha_find_nearest_line entry point. */
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struct alpha_elf_find_line *find_line_info;
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};
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#define alpha_elf_tdata(abfd) \
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((struct alpha_elf_obj_tdata *) (abfd)->tdata.any)
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#define is_alpha_elf(bfd) \
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(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
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&& elf_tdata (bfd) != NULL \
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&& elf_object_id (bfd) == ALPHA_ELF_DATA)
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static bool
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elf64_alpha_mkobject (bfd *abfd)
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{
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return bfd_elf_allocate_object (abfd, sizeof (struct alpha_elf_obj_tdata),
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ALPHA_ELF_DATA);
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}
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static bool
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elf64_alpha_object_p (bfd *abfd)
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{
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/* Set the right machine number for an Alpha ELF file. */
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return bfd_default_set_arch_mach (abfd, bfd_arch_alpha, 0);
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}
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/* A relocation function which doesn't do anything. */
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static bfd_reloc_status_type
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elf64_alpha_reloc_nil (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
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asymbol *sym ATTRIBUTE_UNUSED,
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void * data ATTRIBUTE_UNUSED, asection *sec,
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bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
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{
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if (output_bfd)
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reloc->address += sec->output_offset;
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return bfd_reloc_ok;
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}
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/* A relocation function used for an unsupported reloc. */
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static bfd_reloc_status_type
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elf64_alpha_reloc_bad (bfd *abfd ATTRIBUTE_UNUSED, arelent *reloc,
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asymbol *sym ATTRIBUTE_UNUSED,
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void * data ATTRIBUTE_UNUSED, asection *sec,
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bfd *output_bfd, char **error_message ATTRIBUTE_UNUSED)
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{
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if (output_bfd)
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reloc->address += sec->output_offset;
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return bfd_reloc_notsupported;
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}
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/* Do the work of the GPDISP relocation. */
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static bfd_reloc_status_type
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elf64_alpha_do_reloc_gpdisp (bfd *abfd, bfd_vma gpdisp, bfd_byte *p_ldah,
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bfd_byte *p_lda)
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{
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bfd_reloc_status_type ret = bfd_reloc_ok;
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bfd_vma addend;
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unsigned long i_ldah, i_lda;
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i_ldah = bfd_get_32 (abfd, p_ldah);
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i_lda = bfd_get_32 (abfd, p_lda);
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/* Complain if the instructions are not correct. */
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if (((i_ldah >> 26) & 0x3f) != 0x09
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|| ((i_lda >> 26) & 0x3f) != 0x08)
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ret = bfd_reloc_dangerous;
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/* Extract the user-supplied offset, mirroring the sign extensions
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that the instructions perform. */
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addend = ((i_ldah & 0xffff) << 16) | (i_lda & 0xffff);
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addend = (addend ^ 0x80008000) - 0x80008000;
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gpdisp += addend;
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if ((bfd_signed_vma) gpdisp < -(bfd_signed_vma) 0x80000000
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|| (bfd_signed_vma) gpdisp >= (bfd_signed_vma) 0x7fff8000)
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ret = bfd_reloc_overflow;
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/* compensate for the sign extension again. */
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i_ldah = ((i_ldah & 0xffff0000)
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| (((gpdisp >> 16) + ((gpdisp >> 15) & 1)) & 0xffff));
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i_lda = (i_lda & 0xffff0000) | (gpdisp & 0xffff);
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bfd_put_32 (abfd, (bfd_vma) i_ldah, p_ldah);
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bfd_put_32 (abfd, (bfd_vma) i_lda, p_lda);
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return ret;
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}
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/* The special function for the GPDISP reloc. */
|
||
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static bfd_reloc_status_type
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elf64_alpha_reloc_gpdisp (bfd *abfd, arelent *reloc_entry,
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asymbol *sym ATTRIBUTE_UNUSED, void * data,
|
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asection *input_section, bfd *output_bfd,
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||
char **err_msg)
|
||
{
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||
bfd_reloc_status_type ret;
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bfd_vma gp, relocation;
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bfd_vma high_address;
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bfd_byte *p_ldah, *p_lda;
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/* Don't do anything if we're not doing a final link. */
|
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if (output_bfd)
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{
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
|
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}
|
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|
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high_address = bfd_get_section_limit (abfd, input_section);
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if (reloc_entry->address > high_address
|
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|| reloc_entry->address + reloc_entry->addend > high_address)
|
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return bfd_reloc_outofrange;
|
||
|
||
/* The gp used in the portion of the output object to which this
|
||
input object belongs is cached on the input bfd. */
|
||
gp = _bfd_get_gp_value (abfd);
|
||
|
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relocation = (input_section->output_section->vma
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+ input_section->output_offset
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+ reloc_entry->address);
|
||
|
||
p_ldah = (bfd_byte *) data + reloc_entry->address;
|
||
p_lda = p_ldah + reloc_entry->addend;
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||
|
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ret = elf64_alpha_do_reloc_gpdisp (abfd, gp - relocation, p_ldah, p_lda);
|
||
|
||
/* Complain if the instructions are not correct. */
|
||
if (ret == bfd_reloc_dangerous)
|
||
*err_msg = _("GPDISP relocation did not find ldah and lda instructions");
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
|
||
from smaller values. Start with zero, widen, *then* decrement. */
|
||
#define MINUS_ONE (((bfd_vma)0) - 1)
|
||
|
||
|
||
#define SKIP_HOWTO(N) \
|
||
HOWTO(N, 0, 0, 0, 0, 0, complain_overflow_dont, elf64_alpha_reloc_bad, 0, 0, 0, 0, 0)
|
||
|
||
static reloc_howto_type elf64_alpha_howto_table[] =
|
||
{
|
||
HOWTO (R_ALPHA_NONE, /* type */
|
||
0, /* rightshift */
|
||
0, /* size */
|
||
0, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
elf64_alpha_reloc_nil, /* special_function */
|
||
"NONE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A 32 bit reference to a symbol. */
|
||
HOWTO (R_ALPHA_REFLONG, /* type */
|
||
0, /* rightshift */
|
||
4, /* size */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"REFLONG", /* name */
|
||
false, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 64 bit reference to a symbol. */
|
||
HOWTO (R_ALPHA_REFQUAD, /* type */
|
||
0, /* rightshift */
|
||
8, /* size */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"REFQUAD", /* name */
|
||
false, /* partial_inplace */
|
||
MINUS_ONE, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 32 bit GP relative offset. This is just like REFLONG except
|
||
that when the value is used the value of the gp register will be
|
||
added in. */
|
||
HOWTO (R_ALPHA_GPREL32, /* type */
|
||
0, /* rightshift */
|
||
4, /* size */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"GPREL32", /* name */
|
||
false, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Used for an instruction that refers to memory off the GP register. */
|
||
HOWTO (R_ALPHA_LITERAL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"ELF_LITERAL", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* This reloc only appears immediately following an ELF_LITERAL reloc.
|
||
It identifies a use of the literal. The symbol index is special:
|
||
1 means the literal address is in the base register of a memory
|
||
format instruction; 2 means the literal address is in the byte
|
||
offset register of a byte-manipulation instruction; 3 means the
|
||
literal address is in the target register of a jsr instruction.
|
||
This does not actually do any relocation. */
|
||
HOWTO (R_ALPHA_LITUSE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
32, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
elf64_alpha_reloc_nil, /* special_function */
|
||
"LITUSE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Load the gp register. This is always used for a ldah instruction
|
||
which loads the upper 16 bits of the gp register. The symbol
|
||
index of the GPDISP instruction is an offset in bytes to the lda
|
||
instruction that loads the lower 16 bits. The value to use for
|
||
the relocation is the difference between the GP value and the
|
||
current location; the load will always be done against a register
|
||
holding the current address.
|
||
|
||
NOTE: Unlike ECOFF, partial in-place relocation is not done. If
|
||
any offset is present in the instructions, it is an offset from
|
||
the register to the ldah instruction. This lets us avoid any
|
||
stupid hackery like inventing a gp value to do partial relocation
|
||
against. Also unlike ECOFF, we do the whole relocation off of
|
||
the GPDISP rather than a GPDISP_HI16/GPDISP_LO16 pair. An odd,
|
||
space consuming bit, that, since all the information was present
|
||
in the GPDISP_HI16 reloc. */
|
||
HOWTO (R_ALPHA_GPDISP, /* type */
|
||
16, /* rightshift */
|
||
4, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
elf64_alpha_reloc_gpdisp, /* special_function */
|
||
"GPDISP", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A 21 bit branch. */
|
||
HOWTO (R_ALPHA_BRADDR, /* type */
|
||
2, /* rightshift */
|
||
4, /* size */
|
||
21, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"BRADDR", /* name */
|
||
false, /* partial_inplace */
|
||
0x1fffff, /* src_mask */
|
||
0x1fffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A hint for a jump to a register. */
|
||
HOWTO (R_ALPHA_HINT, /* type */
|
||
2, /* rightshift */
|
||
2, /* size */
|
||
14, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"HINT", /* name */
|
||
false, /* partial_inplace */
|
||
0x3fff, /* src_mask */
|
||
0x3fff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 16 bit PC relative offset. */
|
||
HOWTO (R_ALPHA_SREL16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"SREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* 32 bit PC relative offset. */
|
||
HOWTO (R_ALPHA_SREL32, /* type */
|
||
0, /* rightshift */
|
||
4, /* size */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"SREL32", /* name */
|
||
false, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A 64 bit PC relative offset. */
|
||
HOWTO (R_ALPHA_SREL64, /* type */
|
||
0, /* rightshift */
|
||
8, /* size */
|
||
64, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"SREL64", /* name */
|
||
false, /* partial_inplace */
|
||
MINUS_ONE, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Skip 12 - 16; deprecated ECOFF relocs. */
|
||
SKIP_HOWTO (12),
|
||
SKIP_HOWTO (13),
|
||
SKIP_HOWTO (14),
|
||
SKIP_HOWTO (15),
|
||
SKIP_HOWTO (16),
|
||
|
||
/* The high 16 bits of the displacement from GP to the target. */
|
||
HOWTO (R_ALPHA_GPRELHIGH,
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"GPRELHIGH", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The low 16 bits of the displacement from GP to the target. */
|
||
HOWTO (R_ALPHA_GPRELLOW,
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"GPRELLOW", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 16-bit displacement from the GP to the target. */
|
||
HOWTO (R_ALPHA_GPREL16,
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"GPREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Skip 20 - 23; deprecated ECOFF relocs. */
|
||
SKIP_HOWTO (20),
|
||
SKIP_HOWTO (21),
|
||
SKIP_HOWTO (22),
|
||
SKIP_HOWTO (23),
|
||
|
||
/* Misc ELF relocations. */
|
||
|
||
/* A dynamic relocation to copy the target into our .dynbss section. */
|
||
/* Not generated, as all Alpha objects use PIC, so it is not needed. It
|
||
is present because every other ELF has one, but should not be used
|
||
because .dynbss is an ugly thing. */
|
||
HOWTO (R_ALPHA_COPY,
|
||
0,
|
||
0,
|
||
0,
|
||
false,
|
||
0,
|
||
complain_overflow_dont,
|
||
bfd_elf_generic_reloc,
|
||
"COPY",
|
||
false,
|
||
0,
|
||
0,
|
||
true),
|
||
|
||
/* A dynamic relocation for a .got entry. */
|
||
HOWTO (R_ALPHA_GLOB_DAT,
|
||
0,
|
||
0,
|
||
0,
|
||
false,
|
||
0,
|
||
complain_overflow_dont,
|
||
bfd_elf_generic_reloc,
|
||
"GLOB_DAT",
|
||
false,
|
||
0,
|
||
0,
|
||
true),
|
||
|
||
/* A dynamic relocation for a .plt entry. */
|
||
HOWTO (R_ALPHA_JMP_SLOT,
|
||
0,
|
||
0,
|
||
0,
|
||
false,
|
||
0,
|
||
complain_overflow_dont,
|
||
bfd_elf_generic_reloc,
|
||
"JMP_SLOT",
|
||
false,
|
||
0,
|
||
0,
|
||
true),
|
||
|
||
/* A dynamic relocation to add the base of the DSO to a 64-bit field. */
|
||
HOWTO (R_ALPHA_RELATIVE,
|
||
0,
|
||
0,
|
||
0,
|
||
false,
|
||
0,
|
||
complain_overflow_dont,
|
||
bfd_elf_generic_reloc,
|
||
"RELATIVE",
|
||
false,
|
||
0,
|
||
0,
|
||
true),
|
||
|
||
/* A 21 bit branch that adjusts for gp loads. */
|
||
HOWTO (R_ALPHA_BRSGP, /* type */
|
||
2, /* rightshift */
|
||
4, /* size */
|
||
21, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"BRSGP", /* name */
|
||
false, /* partial_inplace */
|
||
0x1fffff, /* src_mask */
|
||
0x1fffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* Creates a tls_index for the symbol in the got. */
|
||
HOWTO (R_ALPHA_TLSGD, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"TLSGD", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Creates a tls_index for the (current) module in the got. */
|
||
HOWTO (R_ALPHA_TLSLDM, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"TLSLDM", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A dynamic relocation for a DTP module entry. */
|
||
HOWTO (R_ALPHA_DTPMOD64, /* type */
|
||
0, /* rightshift */
|
||
8, /* size */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"DTPMOD64", /* name */
|
||
false, /* partial_inplace */
|
||
MINUS_ONE, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Creates a 64-bit offset in the got for the displacement
|
||
from DTP to the target. */
|
||
HOWTO (R_ALPHA_GOTDTPREL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"GOTDTPREL", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A dynamic relocation for a displacement from DTP to the target. */
|
||
HOWTO (R_ALPHA_DTPREL64, /* type */
|
||
0, /* rightshift */
|
||
8, /* size */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"DTPREL64", /* name */
|
||
false, /* partial_inplace */
|
||
MINUS_ONE, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high 16 bits of the displacement from DTP to the target. */
|
||
HOWTO (R_ALPHA_DTPRELHI, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"DTPRELHI", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The low 16 bits of the displacement from DTP to the target. */
|
||
HOWTO (R_ALPHA_DTPRELLO, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"DTPRELLO", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 16-bit displacement from DTP to the target. */
|
||
HOWTO (R_ALPHA_DTPREL16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"DTPREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Creates a 64-bit offset in the got for the displacement
|
||
from TP to the target. */
|
||
HOWTO (R_ALPHA_GOTTPREL, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"GOTTPREL", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A dynamic relocation for a displacement from TP to the target. */
|
||
HOWTO (R_ALPHA_TPREL64, /* type */
|
||
0, /* rightshift */
|
||
8, /* size */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"TPREL64", /* name */
|
||
false, /* partial_inplace */
|
||
MINUS_ONE, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The high 16 bits of the displacement from TP to the target. */
|
||
HOWTO (R_ALPHA_TPRELHI, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"TPRELHI", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* The low 16 bits of the displacement from TP to the target. */
|
||
HOWTO (R_ALPHA_TPRELLO, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"TPRELLO", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 16-bit displacement from TP to the target. */
|
||
HOWTO (R_ALPHA_TPREL16, /* type */
|
||
0, /* rightshift */
|
||
2, /* size */
|
||
16, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"TPREL16", /* name */
|
||
false, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
};
|
||
|
||
/* A mapping from BFD reloc types to Alpha ELF reloc types. */
|
||
|
||
struct elf_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
int elf_reloc_val;
|
||
};
|
||
|
||
static const struct elf_reloc_map elf64_alpha_reloc_map[] =
|
||
{
|
||
{BFD_RELOC_NONE, R_ALPHA_NONE},
|
||
{BFD_RELOC_32, R_ALPHA_REFLONG},
|
||
{BFD_RELOC_64, R_ALPHA_REFQUAD},
|
||
{BFD_RELOC_CTOR, R_ALPHA_REFQUAD},
|
||
{BFD_RELOC_GPREL32, R_ALPHA_GPREL32},
|
||
{BFD_RELOC_ALPHA_ELF_LITERAL, R_ALPHA_LITERAL},
|
||
{BFD_RELOC_ALPHA_LITUSE, R_ALPHA_LITUSE},
|
||
{BFD_RELOC_ALPHA_GPDISP, R_ALPHA_GPDISP},
|
||
{BFD_RELOC_23_PCREL_S2, R_ALPHA_BRADDR},
|
||
{BFD_RELOC_ALPHA_HINT, R_ALPHA_HINT},
|
||
{BFD_RELOC_16_PCREL, R_ALPHA_SREL16},
|
||
{BFD_RELOC_32_PCREL, R_ALPHA_SREL32},
|
||
{BFD_RELOC_64_PCREL, R_ALPHA_SREL64},
|
||
{BFD_RELOC_ALPHA_GPREL_HI16, R_ALPHA_GPRELHIGH},
|
||
{BFD_RELOC_ALPHA_GPREL_LO16, R_ALPHA_GPRELLOW},
|
||
{BFD_RELOC_GPREL16, R_ALPHA_GPREL16},
|
||
{BFD_RELOC_ALPHA_BRSGP, R_ALPHA_BRSGP},
|
||
{BFD_RELOC_ALPHA_TLSGD, R_ALPHA_TLSGD},
|
||
{BFD_RELOC_ALPHA_TLSLDM, R_ALPHA_TLSLDM},
|
||
{BFD_RELOC_ALPHA_DTPMOD64, R_ALPHA_DTPMOD64},
|
||
{BFD_RELOC_ALPHA_GOTDTPREL16, R_ALPHA_GOTDTPREL},
|
||
{BFD_RELOC_ALPHA_DTPREL64, R_ALPHA_DTPREL64},
|
||
{BFD_RELOC_ALPHA_DTPREL_HI16, R_ALPHA_DTPRELHI},
|
||
{BFD_RELOC_ALPHA_DTPREL_LO16, R_ALPHA_DTPRELLO},
|
||
{BFD_RELOC_ALPHA_DTPREL16, R_ALPHA_DTPREL16},
|
||
{BFD_RELOC_ALPHA_GOTTPREL16, R_ALPHA_GOTTPREL},
|
||
{BFD_RELOC_ALPHA_TPREL64, R_ALPHA_TPREL64},
|
||
{BFD_RELOC_ALPHA_TPREL_HI16, R_ALPHA_TPRELHI},
|
||
{BFD_RELOC_ALPHA_TPREL_LO16, R_ALPHA_TPRELLO},
|
||
{BFD_RELOC_ALPHA_TPREL16, R_ALPHA_TPREL16},
|
||
};
|
||
|
||
/* Given a BFD reloc type, return a HOWTO structure. */
|
||
|
||
static reloc_howto_type *
|
||
elf64_alpha_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
bfd_reloc_code_real_type code)
|
||
{
|
||
const struct elf_reloc_map *i, *e;
|
||
i = e = elf64_alpha_reloc_map;
|
||
e += sizeof (elf64_alpha_reloc_map) / sizeof (struct elf_reloc_map);
|
||
for (; i != e; ++i)
|
||
{
|
||
if (i->bfd_reloc_val == code)
|
||
return &elf64_alpha_howto_table[i->elf_reloc_val];
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
elf64_alpha_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0;
|
||
i < (sizeof (elf64_alpha_howto_table)
|
||
/ sizeof (elf64_alpha_howto_table[0]));
|
||
i++)
|
||
if (elf64_alpha_howto_table[i].name != NULL
|
||
&& strcasecmp (elf64_alpha_howto_table[i].name, r_name) == 0)
|
||
return &elf64_alpha_howto_table[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Given an Alpha ELF reloc type, fill in an arelent structure. */
|
||
|
||
static bool
|
||
elf64_alpha_info_to_howto (bfd *abfd, arelent *cache_ptr,
|
||
Elf_Internal_Rela *dst)
|
||
{
|
||
unsigned r_type = ELF64_R_TYPE(dst->r_info);
|
||
|
||
if (r_type >= R_ALPHA_max)
|
||
{
|
||
/* xgettext:c-format */
|
||
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
|
||
abfd, r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return false;
|
||
}
|
||
cache_ptr->howto = &elf64_alpha_howto_table[r_type];
|
||
return true;
|
||
}
|
||
|
||
/* These two relocations create a two-word entry in the got. */
|
||
#define alpha_got_entry_size(r_type) \
|
||
(r_type == R_ALPHA_TLSGD || r_type == R_ALPHA_TLSLDM ? 16 : 8)
|
||
|
||
/* This is PT_TLS segment p_vaddr. */
|
||
#define alpha_get_dtprel_base(info) \
|
||
(elf_hash_table (info)->tls_sec->vma)
|
||
|
||
/* Main program TLS (whose template starts at PT_TLS p_vaddr)
|
||
is assigned offset round(16, PT_TLS p_align). */
|
||
#define alpha_get_tprel_base(info) \
|
||
(elf_hash_table (info)->tls_sec->vma \
|
||
- align_power ((bfd_vma) 16, \
|
||
elf_hash_table (info)->tls_sec->alignment_power))
|
||
|
||
/* Handle an Alpha specific section when reading an object file. This
|
||
is called when bfd_section_from_shdr finds a section with an unknown
|
||
type. */
|
||
|
||
static bool
|
||
elf64_alpha_section_from_shdr (bfd *abfd,
|
||
Elf_Internal_Shdr *hdr,
|
||
const char *name,
|
||
int shindex)
|
||
{
|
||
asection *newsect;
|
||
|
||
/* There ought to be a place to keep ELF backend specific flags, but
|
||
at the moment there isn't one. We just keep track of the
|
||
sections by their name, instead. Fortunately, the ABI gives
|
||
suggested names for all the MIPS specific sections, so we will
|
||
probably get away with this. */
|
||
switch (hdr->sh_type)
|
||
{
|
||
case SHT_ALPHA_DEBUG:
|
||
if (strcmp (name, ".mdebug") != 0)
|
||
return false;
|
||
break;
|
||
default:
|
||
return false;
|
||
}
|
||
|
||
if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
|
||
return false;
|
||
newsect = hdr->bfd_section;
|
||
|
||
if (hdr->sh_type == SHT_ALPHA_DEBUG)
|
||
{
|
||
if (!bfd_set_section_flags (newsect,
|
||
bfd_section_flags (newsect) | SEC_DEBUGGING))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Convert Alpha specific section flags to bfd internal section flags. */
|
||
|
||
static bool
|
||
elf64_alpha_section_flags (const Elf_Internal_Shdr *hdr)
|
||
{
|
||
if (hdr->sh_flags & SHF_ALPHA_GPREL)
|
||
hdr->bfd_section->flags |= SEC_SMALL_DATA;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the correct type for an Alpha ELF section. We do this by the
|
||
section name, which is a hack, but ought to work. */
|
||
|
||
static bool
|
||
elf64_alpha_fake_sections (bfd *abfd, Elf_Internal_Shdr *hdr, asection *sec)
|
||
{
|
||
register const char *name;
|
||
|
||
name = bfd_section_name (sec);
|
||
|
||
if (strcmp (name, ".mdebug") == 0)
|
||
{
|
||
hdr->sh_type = SHT_ALPHA_DEBUG;
|
||
/* In a shared object on Irix 5.3, the .mdebug section has an
|
||
entsize of 0. FIXME: Does this matter? */
|
||
if ((abfd->flags & DYNAMIC) != 0 )
|
||
hdr->sh_entsize = 0;
|
||
else
|
||
hdr->sh_entsize = 1;
|
||
}
|
||
else if ((sec->flags & SEC_SMALL_DATA)
|
||
|| strcmp (name, ".sdata") == 0
|
||
|| strcmp (name, ".sbss") == 0
|
||
|| strcmp (name, ".lit4") == 0
|
||
|| strcmp (name, ".lit8") == 0)
|
||
hdr->sh_flags |= SHF_ALPHA_GPREL;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Hook called by the linker routine which adds symbols from an object
|
||
file. We use it to put .comm items in .sbss, and not .bss. */
|
||
|
||
static bool
|
||
elf64_alpha_add_symbol_hook (bfd *abfd, struct bfd_link_info *info,
|
||
Elf_Internal_Sym *sym,
|
||
const char **namep ATTRIBUTE_UNUSED,
|
||
flagword *flagsp ATTRIBUTE_UNUSED,
|
||
asection **secp, bfd_vma *valp)
|
||
{
|
||
if (sym->st_shndx == SHN_COMMON
|
||
&& !bfd_link_relocatable (info)
|
||
&& sym->st_size <= elf_gp_size (abfd))
|
||
{
|
||
/* Common symbols less than or equal to -G nn bytes are
|
||
automatically put into .sbss. */
|
||
|
||
asection *scomm = bfd_get_section_by_name (abfd, ".scommon");
|
||
|
||
if (scomm == NULL)
|
||
{
|
||
scomm = bfd_make_section_with_flags (abfd, ".scommon",
|
||
(SEC_ALLOC
|
||
| SEC_IS_COMMON
|
||
| SEC_SMALL_DATA
|
||
| SEC_LINKER_CREATED));
|
||
if (scomm == NULL)
|
||
return false;
|
||
}
|
||
|
||
*secp = scomm;
|
||
*valp = sym->st_size;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create the .got section. */
|
||
|
||
static bool
|
||
elf64_alpha_create_got_section (bfd *abfd,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED)
|
||
{
|
||
flagword flags;
|
||
asection *s;
|
||
|
||
if (! is_alpha_elf (abfd))
|
||
return false;
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED);
|
||
s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
|
||
if (s == NULL
|
||
|| !bfd_set_section_alignment (s, 3))
|
||
return false;
|
||
|
||
alpha_elf_tdata (abfd)->got = s;
|
||
|
||
/* Make sure the object's gotobj is set to itself so that we default
|
||
to every object with its own .got. We'll merge .gots later once
|
||
we've collected each object's info. */
|
||
alpha_elf_tdata (abfd)->gotobj = abfd;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Create all the dynamic sections. */
|
||
|
||
static bool
|
||
elf64_alpha_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
asection *s;
|
||
flagword flags;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
if (! is_alpha_elf (abfd))
|
||
return false;
|
||
|
||
/* We need to create .plt, .rela.plt, .got, and .rela.got sections. */
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| (elf64_alpha_use_secureplt ? SEC_READONLY : 0));
|
||
s = bfd_make_section_anyway_with_flags (abfd, ".plt", flags);
|
||
elf_hash_table (info)->splt = s;
|
||
if (s == NULL || ! bfd_set_section_alignment (s, 4))
|
||
return false;
|
||
|
||
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
|
||
.plt section. */
|
||
h = _bfd_elf_define_linkage_sym (abfd, info, s,
|
||
"_PROCEDURE_LINKAGE_TABLE_");
|
||
elf_hash_table (info)->hplt = h;
|
||
if (h == NULL)
|
||
return false;
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED | SEC_READONLY);
|
||
s = bfd_make_section_anyway_with_flags (abfd, ".rela.plt", flags);
|
||
elf_hash_table (info)->srelplt = s;
|
||
if (s == NULL || ! bfd_set_section_alignment (s, 3))
|
||
return false;
|
||
|
||
if (elf64_alpha_use_secureplt)
|
||
{
|
||
flags = SEC_ALLOC | SEC_LINKER_CREATED;
|
||
s = bfd_make_section_anyway_with_flags (abfd, ".got.plt", flags);
|
||
elf_hash_table (info)->sgotplt = s;
|
||
if (s == NULL || ! bfd_set_section_alignment (s, 3))
|
||
return false;
|
||
}
|
||
|
||
/* We may or may not have created a .got section for this object, but
|
||
we definitely havn't done the rest of the work. */
|
||
|
||
if (alpha_elf_tdata(abfd)->gotobj == NULL)
|
||
{
|
||
if (!elf64_alpha_create_got_section (abfd, info))
|
||
return false;
|
||
}
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED | SEC_READONLY);
|
||
s = bfd_make_section_anyway_with_flags (abfd, ".rela.got", flags);
|
||
elf_hash_table (info)->srelgot = s;
|
||
if (s == NULL
|
||
|| !bfd_set_section_alignment (s, 3))
|
||
return false;
|
||
|
||
/* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the
|
||
dynobj's .got section. We don't do this in the linker script
|
||
because we don't want to define the symbol if we are not creating
|
||
a global offset table. */
|
||
h = _bfd_elf_define_linkage_sym (abfd, info, alpha_elf_tdata(abfd)->got,
|
||
"_GLOBAL_OFFSET_TABLE_");
|
||
elf_hash_table (info)->hgot = h;
|
||
if (h == NULL)
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Read ECOFF debugging information from a .mdebug section into a
|
||
ecoff_debug_info structure. */
|
||
|
||
static bool
|
||
elf64_alpha_read_ecoff_info (bfd *abfd, asection *section,
|
||
struct ecoff_debug_info *debug)
|
||
{
|
||
HDRR *symhdr;
|
||
const struct ecoff_debug_swap *swap;
|
||
char *ext_hdr = NULL;
|
||
|
||
swap = get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
memset (debug, 0, sizeof (*debug));
|
||
|
||
ext_hdr = (char *) bfd_malloc (swap->external_hdr_size);
|
||
if (ext_hdr == NULL && swap->external_hdr_size != 0)
|
||
goto error_return;
|
||
|
||
if (! bfd_get_section_contents (abfd, section, ext_hdr, (file_ptr) 0,
|
||
swap->external_hdr_size))
|
||
goto error_return;
|
||
|
||
symhdr = &debug->symbolic_header;
|
||
(*swap->swap_hdr_in) (abfd, ext_hdr, symhdr);
|
||
|
||
/* The symbolic header contains absolute file offsets and sizes to
|
||
read. */
|
||
#define READ(ptr, offset, count, size, type) \
|
||
do \
|
||
{ \
|
||
size_t amt; \
|
||
debug->ptr = NULL; \
|
||
if (symhdr->count == 0) \
|
||
break; \
|
||
if (_bfd_mul_overflow (size, symhdr->count, &amt)) \
|
||
{ \
|
||
bfd_set_error (bfd_error_file_too_big); \
|
||
goto error_return; \
|
||
} \
|
||
if (bfd_seek (abfd, symhdr->offset, SEEK_SET) != 0) \
|
||
goto error_return; \
|
||
debug->ptr = (type) _bfd_malloc_and_read (abfd, amt, amt); \
|
||
if (debug->ptr == NULL) \
|
||
goto error_return; \
|
||
} while (0)
|
||
|
||
READ (line, cbLineOffset, cbLine, sizeof (unsigned char), unsigned char *);
|
||
READ (external_dnr, cbDnOffset, idnMax, swap->external_dnr_size, void *);
|
||
READ (external_pdr, cbPdOffset, ipdMax, swap->external_pdr_size, void *);
|
||
READ (external_sym, cbSymOffset, isymMax, swap->external_sym_size, void *);
|
||
READ (external_opt, cbOptOffset, ioptMax, swap->external_opt_size, void *);
|
||
READ (external_aux, cbAuxOffset, iauxMax, sizeof (union aux_ext),
|
||
union aux_ext *);
|
||
READ (ss, cbSsOffset, issMax, sizeof (char), char *);
|
||
READ (ssext, cbSsExtOffset, issExtMax, sizeof (char), char *);
|
||
READ (external_fdr, cbFdOffset, ifdMax, swap->external_fdr_size, void *);
|
||
READ (external_rfd, cbRfdOffset, crfd, swap->external_rfd_size, void *);
|
||
READ (external_ext, cbExtOffset, iextMax, swap->external_ext_size, void *);
|
||
#undef READ
|
||
|
||
debug->fdr = NULL;
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
free (ext_hdr);
|
||
_bfd_ecoff_free_ecoff_debug_info (debug);
|
||
return false;
|
||
}
|
||
|
||
/* Alpha ELF local labels start with '$'. */
|
||
|
||
static bool
|
||
elf64_alpha_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, const char *name)
|
||
{
|
||
return name[0] == '$';
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_find_nearest_line (bfd *abfd, asymbol **symbols,
|
||
asection *section, bfd_vma offset,
|
||
const char **filename_ptr,
|
||
const char **functionname_ptr,
|
||
unsigned int *line_ptr,
|
||
unsigned int *discriminator_ptr)
|
||
{
|
||
asection *msec;
|
||
|
||
if (_bfd_dwarf2_find_nearest_line (abfd, symbols, NULL, section, offset,
|
||
filename_ptr, functionname_ptr,
|
||
line_ptr, discriminator_ptr,
|
||
dwarf_debug_sections,
|
||
&elf_tdata (abfd)->dwarf2_find_line_info)
|
||
== 1)
|
||
return true;
|
||
|
||
msec = bfd_get_section_by_name (abfd, ".mdebug");
|
||
if (msec != NULL)
|
||
{
|
||
flagword origflags;
|
||
struct alpha_elf_find_line *fi;
|
||
const struct ecoff_debug_swap * const swap =
|
||
get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
|
||
/* If we are called during a link, alpha_elf_final_link may have
|
||
cleared the SEC_HAS_CONTENTS field. We force it back on here
|
||
if appropriate (which it normally will be). */
|
||
origflags = msec->flags;
|
||
if (elf_section_data (msec)->this_hdr.sh_type != SHT_NOBITS)
|
||
msec->flags |= SEC_HAS_CONTENTS;
|
||
|
||
fi = alpha_elf_tdata (abfd)->find_line_info;
|
||
if (fi == NULL)
|
||
{
|
||
bfd_size_type external_fdr_size;
|
||
char *fraw_src;
|
||
char *fraw_end;
|
||
struct fdr *fdr_ptr;
|
||
bfd_size_type amt = sizeof (struct alpha_elf_find_line);
|
||
|
||
fi = (struct alpha_elf_find_line *) bfd_zalloc (abfd, amt);
|
||
if (fi == NULL)
|
||
{
|
||
msec->flags = origflags;
|
||
return false;
|
||
}
|
||
|
||
if (!elf64_alpha_read_ecoff_info (abfd, msec, &fi->d))
|
||
{
|
||
msec->flags = origflags;
|
||
return false;
|
||
}
|
||
|
||
/* Swap in the FDR information. */
|
||
amt = fi->d.symbolic_header.ifdMax * sizeof (struct fdr);
|
||
fi->d.fdr = (struct fdr *) bfd_alloc (abfd, amt);
|
||
if (fi->d.fdr == NULL)
|
||
{
|
||
msec->flags = origflags;
|
||
return false;
|
||
}
|
||
external_fdr_size = swap->external_fdr_size;
|
||
fdr_ptr = fi->d.fdr;
|
||
fraw_src = (char *) fi->d.external_fdr;
|
||
fraw_end = (fraw_src
|
||
+ fi->d.symbolic_header.ifdMax * external_fdr_size);
|
||
for (; fraw_src < fraw_end; fraw_src += external_fdr_size, fdr_ptr++)
|
||
(*swap->swap_fdr_in) (abfd, fraw_src, fdr_ptr);
|
||
|
||
alpha_elf_tdata (abfd)->find_line_info = fi;
|
||
}
|
||
|
||
if (_bfd_ecoff_locate_line (abfd, section, offset, &fi->d, swap,
|
||
&fi->i, filename_ptr, functionname_ptr,
|
||
line_ptr))
|
||
{
|
||
msec->flags = origflags;
|
||
return true;
|
||
}
|
||
|
||
msec->flags = origflags;
|
||
}
|
||
|
||
/* Fall back on the generic ELF find_nearest_line routine. */
|
||
|
||
return _bfd_elf_find_nearest_line (abfd, symbols, section, offset,
|
||
filename_ptr, functionname_ptr,
|
||
line_ptr, discriminator_ptr);
|
||
}
|
||
|
||
/* Structure used to pass information to alpha_elf_output_extsym. */
|
||
|
||
struct extsym_info
|
||
{
|
||
bfd *abfd;
|
||
struct bfd_link_info *info;
|
||
struct ecoff_debug_info *debug;
|
||
const struct ecoff_debug_swap *swap;
|
||
bool failed;
|
||
};
|
||
|
||
static bool
|
||
elf64_alpha_output_extsym (struct elf_link_hash_entry *x, void * data)
|
||
{
|
||
struct alpha_elf_link_hash_entry *h = (struct alpha_elf_link_hash_entry *) x;
|
||
struct extsym_info *einfo = (struct extsym_info *) data;
|
||
bool strip;
|
||
asection *sec, *output_section;
|
||
|
||
if (h->root.indx == -2)
|
||
strip = false;
|
||
else if ((h->root.def_dynamic
|
||
|| h->root.ref_dynamic
|
||
|| h->root.root.type == bfd_link_hash_new)
|
||
&& !h->root.def_regular
|
||
&& !h->root.ref_regular)
|
||
strip = true;
|
||
else if (einfo->info->strip == strip_all
|
||
|| (einfo->info->strip == strip_some
|
||
&& bfd_hash_lookup (einfo->info->keep_hash,
|
||
h->root.root.root.string,
|
||
false, false) == NULL))
|
||
strip = true;
|
||
else
|
||
strip = false;
|
||
|
||
if (strip)
|
||
return true;
|
||
|
||
if (h->esym.ifd == -2)
|
||
{
|
||
h->esym.jmptbl = 0;
|
||
h->esym.cobol_main = 0;
|
||
h->esym.weakext = 0;
|
||
h->esym.reserved = 0;
|
||
h->esym.ifd = ifdNil;
|
||
h->esym.asym.value = 0;
|
||
h->esym.asym.st = stGlobal;
|
||
|
||
if (h->root.root.type != bfd_link_hash_defined
|
||
&& h->root.root.type != bfd_link_hash_defweak)
|
||
h->esym.asym.sc = scAbs;
|
||
else
|
||
{
|
||
const char *name;
|
||
|
||
sec = h->root.root.u.def.section;
|
||
output_section = sec->output_section;
|
||
|
||
/* When making a shared library and symbol h is the one from
|
||
the another shared library, OUTPUT_SECTION may be null. */
|
||
if (output_section == NULL)
|
||
h->esym.asym.sc = scUndefined;
|
||
else
|
||
{
|
||
name = bfd_section_name (output_section);
|
||
|
||
if (strcmp (name, ".text") == 0)
|
||
h->esym.asym.sc = scText;
|
||
else if (strcmp (name, ".data") == 0)
|
||
h->esym.asym.sc = scData;
|
||
else if (strcmp (name, ".sdata") == 0)
|
||
h->esym.asym.sc = scSData;
|
||
else if (strcmp (name, ".rodata") == 0
|
||
|| strcmp (name, ".rdata") == 0)
|
||
h->esym.asym.sc = scRData;
|
||
else if (strcmp (name, ".bss") == 0)
|
||
h->esym.asym.sc = scBss;
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
h->esym.asym.sc = scSBss;
|
||
else if (strcmp (name, ".init") == 0)
|
||
h->esym.asym.sc = scInit;
|
||
else if (strcmp (name, ".fini") == 0)
|
||
h->esym.asym.sc = scFini;
|
||
else
|
||
h->esym.asym.sc = scAbs;
|
||
}
|
||
}
|
||
|
||
h->esym.asym.reserved = 0;
|
||
h->esym.asym.index = indexNil;
|
||
}
|
||
|
||
if (h->root.root.type == bfd_link_hash_common)
|
||
h->esym.asym.value = h->root.root.u.c.size;
|
||
else if (h->root.root.type == bfd_link_hash_defined
|
||
|| h->root.root.type == bfd_link_hash_defweak)
|
||
{
|
||
if (h->esym.asym.sc == scCommon)
|
||
h->esym.asym.sc = scBss;
|
||
else if (h->esym.asym.sc == scSCommon)
|
||
h->esym.asym.sc = scSBss;
|
||
|
||
sec = h->root.root.u.def.section;
|
||
output_section = sec->output_section;
|
||
if (output_section != NULL)
|
||
h->esym.asym.value = (h->root.root.u.def.value
|
||
+ sec->output_offset
|
||
+ output_section->vma);
|
||
else
|
||
h->esym.asym.value = 0;
|
||
}
|
||
|
||
if (! bfd_ecoff_debug_one_external (einfo->abfd, einfo->debug, einfo->swap,
|
||
h->root.root.root.string,
|
||
&h->esym))
|
||
{
|
||
einfo->failed = true;
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Search for and possibly create a got entry. */
|
||
|
||
static struct alpha_elf_got_entry *
|
||
get_got_entry (bfd *abfd, struct alpha_elf_link_hash_entry *h,
|
||
unsigned long r_type, unsigned long r_symndx,
|
||
bfd_vma r_addend)
|
||
{
|
||
struct alpha_elf_got_entry *gotent;
|
||
struct alpha_elf_got_entry **slot;
|
||
|
||
if (h)
|
||
slot = &h->got_entries;
|
||
else
|
||
{
|
||
/* This is a local .got entry -- record for merge. */
|
||
|
||
struct alpha_elf_got_entry **local_got_entries;
|
||
|
||
local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
|
||
if (!local_got_entries)
|
||
{
|
||
bfd_size_type size;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
|
||
symtab_hdr = &elf_tdata(abfd)->symtab_hdr;
|
||
size = symtab_hdr->sh_info;
|
||
size *= sizeof (struct alpha_elf_got_entry *);
|
||
|
||
local_got_entries
|
||
= (struct alpha_elf_got_entry **) bfd_zalloc (abfd, size);
|
||
if (!local_got_entries)
|
||
return NULL;
|
||
|
||
alpha_elf_tdata (abfd)->local_got_entries = local_got_entries;
|
||
}
|
||
|
||
slot = &local_got_entries[r_symndx];
|
||
}
|
||
|
||
for (gotent = *slot; gotent ; gotent = gotent->next)
|
||
if (gotent->gotobj == abfd
|
||
&& gotent->reloc_type == r_type
|
||
&& gotent->addend == r_addend)
|
||
break;
|
||
|
||
if (!gotent)
|
||
{
|
||
int entry_size;
|
||
size_t amt;
|
||
|
||
amt = sizeof (struct alpha_elf_got_entry);
|
||
gotent = (struct alpha_elf_got_entry *) bfd_alloc (abfd, amt);
|
||
if (!gotent)
|
||
return NULL;
|
||
|
||
gotent->gotobj = abfd;
|
||
gotent->addend = r_addend;
|
||
gotent->got_offset = -1;
|
||
gotent->plt_offset = -1;
|
||
gotent->use_count = 1;
|
||
gotent->reloc_type = r_type;
|
||
gotent->reloc_done = 0;
|
||
gotent->reloc_xlated = 0;
|
||
|
||
gotent->next = *slot;
|
||
*slot = gotent;
|
||
|
||
entry_size = alpha_got_entry_size (r_type);
|
||
alpha_elf_tdata (abfd)->total_got_size += entry_size;
|
||
if (!h)
|
||
alpha_elf_tdata(abfd)->local_got_size += entry_size;
|
||
}
|
||
else
|
||
gotent->use_count += 1;
|
||
|
||
return gotent;
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_want_plt (struct alpha_elf_link_hash_entry *ah)
|
||
{
|
||
return ((ah->root.type == STT_FUNC
|
||
|| ah->root.root.type == bfd_link_hash_undefweak
|
||
|| ah->root.root.type == bfd_link_hash_undefined)
|
||
&& (ah->flags & ALPHA_ELF_LINK_HASH_LU_PLT) != 0
|
||
&& (ah->flags & ~ALPHA_ELF_LINK_HASH_LU_PLT) == 0);
|
||
}
|
||
|
||
/* Whether to sort relocs output by ld -r or ld --emit-relocs, by r_offset.
|
||
Don't do so for code sections. We want to keep ordering of LITERAL/LITUSE
|
||
as is. On the other hand, elf-eh-frame.c processing requires .eh_frame
|
||
relocs to be sorted. */
|
||
|
||
static bool
|
||
elf64_alpha_sort_relocs_p (asection *sec)
|
||
{
|
||
return (sec->flags & SEC_CODE) == 0;
|
||
}
|
||
|
||
|
||
/* Handle dynamic relocations when doing an Alpha ELF link. */
|
||
|
||
static bool
|
||
elf64_alpha_check_relocs (bfd *abfd, struct bfd_link_info *info,
|
||
asection *sec, const Elf_Internal_Rela *relocs)
|
||
{
|
||
bfd *dynobj;
|
||
asection *sreloc;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct alpha_elf_link_hash_entry **sym_hashes;
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
|
||
if (bfd_link_relocatable (info))
|
||
return true;
|
||
|
||
BFD_ASSERT (is_alpha_elf (abfd));
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
|
||
sreloc = NULL;
|
||
symtab_hdr = &elf_symtab_hdr (abfd);
|
||
sym_hashes = alpha_elf_sym_hashes (abfd);
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; ++rel)
|
||
{
|
||
enum {
|
||
NEED_GOT = 1,
|
||
NEED_GOT_ENTRY = 2,
|
||
NEED_DYNREL = 4
|
||
};
|
||
|
||
unsigned long r_symndx, r_type;
|
||
struct alpha_elf_link_hash_entry *h;
|
||
unsigned int gotent_flags;
|
||
bool maybe_dynamic;
|
||
unsigned int need;
|
||
bfd_vma addend;
|
||
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
while (h->root.root.type == bfd_link_hash_indirect
|
||
|| h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
|
||
|
||
/* PR15323, ref flags aren't set for references in the same
|
||
object. */
|
||
h->root.ref_regular = 1;
|
||
}
|
||
|
||
/* We can only get preliminary data on whether a symbol is
|
||
locally or externally defined, as not all of the input files
|
||
have yet been processed. Do something with what we know, as
|
||
this may help reduce memory usage and processing time later. */
|
||
maybe_dynamic = false;
|
||
if (h && ((bfd_link_pic (info)
|
||
&& (!info->symbolic
|
||
|| info->unresolved_syms_in_shared_libs == RM_IGNORE))
|
||
|| !h->root.def_regular
|
||
|| h->root.root.type == bfd_link_hash_defweak))
|
||
maybe_dynamic = true;
|
||
|
||
need = 0;
|
||
gotent_flags = 0;
|
||
r_type = ELF64_R_TYPE (rel->r_info);
|
||
addend = rel->r_addend;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_ALPHA_LITERAL:
|
||
need = NEED_GOT | NEED_GOT_ENTRY;
|
||
|
||
/* Remember how this literal is used from its LITUSEs.
|
||
This will be important when it comes to decide if we can
|
||
create a .plt entry for a function symbol. */
|
||
while (++rel < relend && ELF64_R_TYPE (rel->r_info) == R_ALPHA_LITUSE)
|
||
if (rel->r_addend >= 1 && rel->r_addend <= 6)
|
||
gotent_flags |= 1 << rel->r_addend;
|
||
--rel;
|
||
|
||
/* No LITUSEs -- presumably the address is used somehow. */
|
||
if (gotent_flags == 0)
|
||
gotent_flags = ALPHA_ELF_LINK_HASH_LU_ADDR;
|
||
break;
|
||
|
||
case R_ALPHA_GPDISP:
|
||
case R_ALPHA_GPREL16:
|
||
case R_ALPHA_GPREL32:
|
||
case R_ALPHA_GPRELHIGH:
|
||
case R_ALPHA_GPRELLOW:
|
||
case R_ALPHA_BRSGP:
|
||
need = NEED_GOT;
|
||
break;
|
||
|
||
case R_ALPHA_REFLONG:
|
||
case R_ALPHA_REFQUAD:
|
||
if (bfd_link_pic (info) || maybe_dynamic)
|
||
need = NEED_DYNREL;
|
||
break;
|
||
|
||
case R_ALPHA_TLSLDM:
|
||
/* The symbol for a TLSLDM reloc is ignored. Collapse the
|
||
reloc to the STN_UNDEF (0) symbol so that they all match. */
|
||
r_symndx = STN_UNDEF;
|
||
h = 0;
|
||
maybe_dynamic = false;
|
||
/* FALLTHRU */
|
||
|
||
case R_ALPHA_TLSGD:
|
||
case R_ALPHA_GOTDTPREL:
|
||
need = NEED_GOT | NEED_GOT_ENTRY;
|
||
break;
|
||
|
||
case R_ALPHA_GOTTPREL:
|
||
need = NEED_GOT | NEED_GOT_ENTRY;
|
||
gotent_flags = ALPHA_ELF_LINK_HASH_TLS_IE;
|
||
if (bfd_link_pic (info))
|
||
info->flags |= DF_STATIC_TLS;
|
||
break;
|
||
|
||
case R_ALPHA_TPREL64:
|
||
if (bfd_link_dll (info))
|
||
{
|
||
info->flags |= DF_STATIC_TLS;
|
||
need = NEED_DYNREL;
|
||
}
|
||
else if (maybe_dynamic)
|
||
need = NEED_DYNREL;
|
||
break;
|
||
}
|
||
|
||
if (need & NEED_GOT)
|
||
{
|
||
if (alpha_elf_tdata(abfd)->gotobj == NULL)
|
||
{
|
||
if (!elf64_alpha_create_got_section (abfd, info))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (need & NEED_GOT_ENTRY)
|
||
{
|
||
struct alpha_elf_got_entry *gotent;
|
||
|
||
gotent = get_got_entry (abfd, h, r_type, r_symndx, addend);
|
||
if (!gotent)
|
||
return false;
|
||
|
||
if (gotent_flags)
|
||
{
|
||
gotent->flags |= gotent_flags;
|
||
if (h)
|
||
{
|
||
gotent_flags |= h->flags;
|
||
h->flags = gotent_flags;
|
||
|
||
/* Make a guess as to whether a .plt entry is needed. */
|
||
/* ??? It appears that we won't make it into
|
||
adjust_dynamic_symbol for symbols that remain
|
||
totally undefined. Copying this check here means
|
||
we can create a plt entry for them too. */
|
||
h->root.needs_plt
|
||
= (maybe_dynamic && elf64_alpha_want_plt (h));
|
||
}
|
||
}
|
||
}
|
||
|
||
if (need & NEED_DYNREL)
|
||
{
|
||
/* We need to create the section here now whether we eventually
|
||
use it or not so that it gets mapped to an output section by
|
||
the linker. If not used, we'll kill it in size_dynamic_sections. */
|
||
if (sreloc == NULL)
|
||
{
|
||
sreloc = _bfd_elf_make_dynamic_reloc_section
|
||
(sec, dynobj, 3, abfd, /*rela?*/ true);
|
||
|
||
if (sreloc == NULL)
|
||
return false;
|
||
}
|
||
|
||
if (h)
|
||
{
|
||
/* Since we havn't seen all of the input symbols yet, we
|
||
don't know whether we'll actually need a dynamic relocation
|
||
entry for this reloc. So make a record of it. Once we
|
||
find out if this thing needs dynamic relocation we'll
|
||
expand the relocation sections by the appropriate amount. */
|
||
|
||
struct alpha_elf_reloc_entry *rent;
|
||
|
||
for (rent = h->reloc_entries; rent; rent = rent->next)
|
||
if (rent->rtype == r_type && rent->srel == sreloc)
|
||
break;
|
||
|
||
if (!rent)
|
||
{
|
||
size_t amt = sizeof (struct alpha_elf_reloc_entry);
|
||
rent = (struct alpha_elf_reloc_entry *) bfd_alloc (abfd, amt);
|
||
if (!rent)
|
||
return false;
|
||
|
||
rent->srel = sreloc;
|
||
rent->sec = sec;
|
||
rent->rtype = r_type;
|
||
rent->count = 1;
|
||
|
||
rent->next = h->reloc_entries;
|
||
h->reloc_entries = rent;
|
||
}
|
||
else
|
||
rent->count++;
|
||
}
|
||
else if (bfd_link_pic (info))
|
||
{
|
||
/* If this is a shared library, and the section is to be
|
||
loaded into memory, we need a RELATIVE reloc. */
|
||
sreloc->size += sizeof (Elf64_External_Rela);
|
||
if (sec->flags & SEC_READONLY)
|
||
{
|
||
info->flags |= DF_TEXTREL;
|
||
info->callbacks->minfo
|
||
(_("%pB: dynamic relocation against a local symbol in "
|
||
"read-only section `%pA'\n"),
|
||
sec->owner, sec);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
elf64_alpha_gc_mark_hook (asection *sec, struct bfd_link_info *info,
|
||
Elf_Internal_Rela *rel,
|
||
struct elf_link_hash_entry *h, Elf_Internal_Sym *sym)
|
||
{
|
||
/* These relocations don't really reference a symbol. Instead we store
|
||
extra data in their addend slot. Ignore the symbol. */
|
||
switch (ELF64_R_TYPE (rel->r_info))
|
||
{
|
||
case R_ALPHA_LITUSE:
|
||
case R_ALPHA_GPDISP:
|
||
case R_ALPHA_HINT:
|
||
return NULL;
|
||
}
|
||
|
||
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. The current definition is in some section of the
|
||
dynamic object, but we're not including those sections. We have to
|
||
change the definition to something the rest of the link can
|
||
understand. */
|
||
|
||
static bool
|
||
elf64_alpha_adjust_dynamic_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h)
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
struct alpha_elf_link_hash_entry *ah;
|
||
|
||
dynobj = elf_hash_table(info)->dynobj;
|
||
ah = (struct alpha_elf_link_hash_entry *)h;
|
||
|
||
/* Now that we've seen all of the input symbols, finalize our decision
|
||
about whether this symbol should get a .plt entry. Irritatingly, it
|
||
is common for folk to leave undefined symbols in shared libraries,
|
||
and they still expect lazy binding; accept undefined symbols in lieu
|
||
of STT_FUNC. */
|
||
if (alpha_elf_dynamic_symbol_p (h, info) && elf64_alpha_want_plt (ah))
|
||
{
|
||
h->needs_plt = true;
|
||
|
||
s = elf_hash_table(info)->splt;
|
||
if (!s && !elf64_alpha_create_dynamic_sections (dynobj, info))
|
||
return false;
|
||
|
||
/* We need one plt entry per got subsection. Delay allocation of
|
||
the actual plt entries until size_plt_section, called from
|
||
size_dynamic_sections or during relaxation. */
|
||
|
||
return true;
|
||
}
|
||
else
|
||
h->needs_plt = false;
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->is_weakalias)
|
||
{
|
||
struct elf_link_hash_entry *def = weakdef (h);
|
||
BFD_ASSERT (def->root.type == bfd_link_hash_defined);
|
||
h->root.u.def.section = def->root.u.def.section;
|
||
h->root.u.def.value = def->root.u.def.value;
|
||
return true;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. The Alpha, since it uses .got entries for all
|
||
symbols even in regular objects, does not need the hackery of a
|
||
.dynbss section and COPY dynamic relocations. */
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Record STO_ALPHA_NOPV and STO_ALPHA_STD_GPLOAD. */
|
||
|
||
static void
|
||
elf64_alpha_merge_symbol_attribute (struct elf_link_hash_entry *h,
|
||
unsigned int st_other,
|
||
bool definition,
|
||
bool dynamic)
|
||
{
|
||
if (!dynamic && definition)
|
||
h->other = ((h->other & ELF_ST_VISIBILITY (-1))
|
||
| (st_other & ~ELF_ST_VISIBILITY (-1)));
|
||
}
|
||
|
||
/* Symbol versioning can create new symbols, and make our old symbols
|
||
indirect to the new ones. Consolidate the got and reloc information
|
||
in these situations. */
|
||
|
||
static void
|
||
elf64_alpha_copy_indirect_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *dir,
|
||
struct elf_link_hash_entry *ind)
|
||
{
|
||
struct alpha_elf_link_hash_entry *hi
|
||
= (struct alpha_elf_link_hash_entry *) ind;
|
||
struct alpha_elf_link_hash_entry *hs
|
||
= (struct alpha_elf_link_hash_entry *) dir;
|
||
|
||
/* Do the merging in the superclass. */
|
||
_bfd_elf_link_hash_copy_indirect(info, dir, ind);
|
||
|
||
/* Merge the flags. Whee. */
|
||
hs->flags |= hi->flags;
|
||
|
||
/* ??? It's unclear to me what's really supposed to happen when
|
||
"merging" defweak and defined symbols, given that we don't
|
||
actually throw away the defweak. This more-or-less copies
|
||
the logic related to got and plt entries in the superclass. */
|
||
if (ind->root.type != bfd_link_hash_indirect)
|
||
return;
|
||
|
||
/* Merge the .got entries. Cannibalize the old symbol's list in
|
||
doing so, since we don't need it anymore. */
|
||
|
||
if (hs->got_entries == NULL)
|
||
hs->got_entries = hi->got_entries;
|
||
else
|
||
{
|
||
struct alpha_elf_got_entry *gi, *gs, *gin, *gsh;
|
||
|
||
gsh = hs->got_entries;
|
||
for (gi = hi->got_entries; gi ; gi = gin)
|
||
{
|
||
gin = gi->next;
|
||
for (gs = gsh; gs ; gs = gs->next)
|
||
if (gi->gotobj == gs->gotobj
|
||
&& gi->reloc_type == gs->reloc_type
|
||
&& gi->addend == gs->addend)
|
||
{
|
||
gs->use_count += gi->use_count;
|
||
goto got_found;
|
||
}
|
||
gi->next = hs->got_entries;
|
||
hs->got_entries = gi;
|
||
got_found:;
|
||
}
|
||
}
|
||
hi->got_entries = NULL;
|
||
|
||
/* And similar for the reloc entries. */
|
||
|
||
if (hs->reloc_entries == NULL)
|
||
hs->reloc_entries = hi->reloc_entries;
|
||
else
|
||
{
|
||
struct alpha_elf_reloc_entry *ri, *rs, *rin, *rsh;
|
||
|
||
rsh = hs->reloc_entries;
|
||
for (ri = hi->reloc_entries; ri ; ri = rin)
|
||
{
|
||
rin = ri->next;
|
||
for (rs = rsh; rs ; rs = rs->next)
|
||
if (ri->rtype == rs->rtype && ri->srel == rs->srel)
|
||
{
|
||
rs->count += ri->count;
|
||
goto found_reloc;
|
||
}
|
||
ri->next = hs->reloc_entries;
|
||
hs->reloc_entries = ri;
|
||
found_reloc:;
|
||
}
|
||
}
|
||
hi->reloc_entries = NULL;
|
||
}
|
||
|
||
/* Is it possible to merge two object file's .got tables? */
|
||
|
||
static bool
|
||
elf64_alpha_can_merge_gots (bfd *a, bfd *b)
|
||
{
|
||
int total = alpha_elf_tdata (a)->total_got_size;
|
||
bfd *bsub;
|
||
|
||
/* Trivial quick fallout test. */
|
||
if (total + alpha_elf_tdata (b)->total_got_size <= MAX_GOT_SIZE)
|
||
return true;
|
||
|
||
/* By their nature, local .got entries cannot be merged. */
|
||
if ((total += alpha_elf_tdata (b)->local_got_size) > MAX_GOT_SIZE)
|
||
return false;
|
||
|
||
/* Failing the common trivial comparison, we must effectively
|
||
perform the merge. Not actually performing the merge means that
|
||
we don't have to store undo information in case we fail. */
|
||
for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
|
||
{
|
||
struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
|
||
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
|
||
int i, n;
|
||
|
||
n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
|
||
for (i = 0; i < n; ++i)
|
||
{
|
||
struct alpha_elf_got_entry *ae, *be;
|
||
struct alpha_elf_link_hash_entry *h;
|
||
|
||
h = hashes[i];
|
||
while (h->root.root.type == bfd_link_hash_indirect
|
||
|| h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
|
||
|
||
for (be = h->got_entries; be ; be = be->next)
|
||
{
|
||
if (be->use_count == 0)
|
||
continue;
|
||
if (be->gotobj != b)
|
||
continue;
|
||
|
||
for (ae = h->got_entries; ae ; ae = ae->next)
|
||
if (ae->gotobj == a
|
||
&& ae->reloc_type == be->reloc_type
|
||
&& ae->addend == be->addend)
|
||
goto global_found;
|
||
|
||
total += alpha_got_entry_size (be->reloc_type);
|
||
if (total > MAX_GOT_SIZE)
|
||
return false;
|
||
global_found:;
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Actually merge two .got tables. */
|
||
|
||
static void
|
||
elf64_alpha_merge_gots (bfd *a, bfd *b)
|
||
{
|
||
int total = alpha_elf_tdata (a)->total_got_size;
|
||
bfd *bsub;
|
||
|
||
/* Remember local expansion. */
|
||
{
|
||
int e = alpha_elf_tdata (b)->local_got_size;
|
||
total += e;
|
||
alpha_elf_tdata (a)->local_got_size += e;
|
||
}
|
||
|
||
for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
|
||
{
|
||
struct alpha_elf_got_entry **local_got_entries;
|
||
struct alpha_elf_link_hash_entry **hashes;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
int i, n;
|
||
|
||
/* Let the local .got entries know they are part of a new subsegment. */
|
||
local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
|
||
if (local_got_entries)
|
||
{
|
||
n = elf_tdata (bsub)->symtab_hdr.sh_info;
|
||
for (i = 0; i < n; ++i)
|
||
{
|
||
struct alpha_elf_got_entry *ent;
|
||
for (ent = local_got_entries[i]; ent; ent = ent->next)
|
||
ent->gotobj = a;
|
||
}
|
||
}
|
||
|
||
/* Merge the global .got entries. */
|
||
hashes = alpha_elf_sym_hashes (bsub);
|
||
symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
|
||
|
||
n = NUM_SHDR_ENTRIES (symtab_hdr) - symtab_hdr->sh_info;
|
||
for (i = 0; i < n; ++i)
|
||
{
|
||
struct alpha_elf_got_entry *ae, *be, **pbe, **start;
|
||
struct alpha_elf_link_hash_entry *h;
|
||
|
||
h = hashes[i];
|
||
while (h->root.root.type == bfd_link_hash_indirect
|
||
|| h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
|
||
|
||
pbe = start = &h->got_entries;
|
||
while ((be = *pbe) != NULL)
|
||
{
|
||
if (be->use_count == 0)
|
||
{
|
||
*pbe = be->next;
|
||
memset (be, 0xa5, sizeof (*be));
|
||
goto kill;
|
||
}
|
||
if (be->gotobj != b)
|
||
goto next;
|
||
|
||
for (ae = *start; ae ; ae = ae->next)
|
||
if (ae->gotobj == a
|
||
&& ae->reloc_type == be->reloc_type
|
||
&& ae->addend == be->addend)
|
||
{
|
||
ae->flags |= be->flags;
|
||
ae->use_count += be->use_count;
|
||
*pbe = be->next;
|
||
memset (be, 0xa5, sizeof (*be));
|
||
goto kill;
|
||
}
|
||
be->gotobj = a;
|
||
total += alpha_got_entry_size (be->reloc_type);
|
||
|
||
next:;
|
||
pbe = &be->next;
|
||
kill:;
|
||
}
|
||
}
|
||
|
||
alpha_elf_tdata (bsub)->gotobj = a;
|
||
}
|
||
alpha_elf_tdata (a)->total_got_size = total;
|
||
|
||
/* Merge the two in_got chains. */
|
||
{
|
||
bfd *next;
|
||
|
||
bsub = a;
|
||
while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
|
||
bsub = next;
|
||
|
||
alpha_elf_tdata (bsub)->in_got_link_next = b;
|
||
}
|
||
}
|
||
|
||
/* Calculate the offsets for the got entries. */
|
||
|
||
static bool
|
||
elf64_alpha_calc_got_offsets_for_symbol (struct alpha_elf_link_hash_entry *h,
|
||
void * arg ATTRIBUTE_UNUSED)
|
||
{
|
||
struct alpha_elf_got_entry *gotent;
|
||
|
||
for (gotent = h->got_entries; gotent; gotent = gotent->next)
|
||
if (gotent->use_count > 0)
|
||
{
|
||
struct alpha_elf_obj_tdata *td;
|
||
bfd_size_type *plge;
|
||
|
||
td = alpha_elf_tdata (gotent->gotobj);
|
||
plge = &td->got->size;
|
||
gotent->got_offset = *plge;
|
||
*plge += alpha_got_entry_size (gotent->reloc_type);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static void
|
||
elf64_alpha_calc_got_offsets (struct bfd_link_info *info)
|
||
{
|
||
bfd *i, *got_list;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return;
|
||
got_list = htab->got_list;
|
||
|
||
/* First, zero out the .got sizes, as we may be recalculating the
|
||
.got after optimizing it. */
|
||
for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
|
||
alpha_elf_tdata(i)->got->size = 0;
|
||
|
||
/* Next, fill in the offsets for all the global entries. */
|
||
alpha_elf_link_hash_traverse (htab,
|
||
elf64_alpha_calc_got_offsets_for_symbol,
|
||
NULL);
|
||
|
||
/* Finally, fill in the offsets for the local entries. */
|
||
for (i = got_list; i ; i = alpha_elf_tdata(i)->got_link_next)
|
||
{
|
||
bfd_size_type got_offset = alpha_elf_tdata(i)->got->size;
|
||
bfd *j;
|
||
|
||
for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
|
||
{
|
||
struct alpha_elf_got_entry **local_got_entries, *gotent;
|
||
int k, n;
|
||
|
||
local_got_entries = alpha_elf_tdata(j)->local_got_entries;
|
||
if (!local_got_entries)
|
||
continue;
|
||
|
||
for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
|
||
for (gotent = local_got_entries[k]; gotent; gotent = gotent->next)
|
||
if (gotent->use_count > 0)
|
||
{
|
||
gotent->got_offset = got_offset;
|
||
got_offset += alpha_got_entry_size (gotent->reloc_type);
|
||
}
|
||
}
|
||
|
||
alpha_elf_tdata(i)->got->size = got_offset;
|
||
}
|
||
}
|
||
|
||
/* Constructs the gots. */
|
||
|
||
static bool
|
||
elf64_alpha_size_got_sections (struct bfd_link_info *info,
|
||
bool may_merge)
|
||
{
|
||
bfd *i, *got_list, *cur_got_obj = NULL;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return false;
|
||
got_list = htab->got_list;
|
||
|
||
/* On the first time through, pretend we have an existing got list
|
||
consisting of all of the input files. */
|
||
if (got_list == NULL)
|
||
{
|
||
for (i = info->input_bfds; i ; i = i->link.next)
|
||
{
|
||
bfd *this_got;
|
||
|
||
if (! is_alpha_elf (i))
|
||
continue;
|
||
|
||
this_got = alpha_elf_tdata (i)->gotobj;
|
||
if (this_got == NULL)
|
||
continue;
|
||
|
||
/* We are assuming no merging has yet occurred. */
|
||
BFD_ASSERT (this_got == i);
|
||
|
||
if (alpha_elf_tdata (this_got)->total_got_size > MAX_GOT_SIZE)
|
||
{
|
||
/* Yikes! A single object file has too many entries. */
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: .got subsegment exceeds 64K (size %d)"),
|
||
i, alpha_elf_tdata (this_got)->total_got_size);
|
||
return false;
|
||
}
|
||
|
||
if (got_list == NULL)
|
||
got_list = this_got;
|
||
else
|
||
alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
|
||
cur_got_obj = this_got;
|
||
}
|
||
|
||
/* Strange degenerate case of no got references. */
|
||
if (got_list == NULL)
|
||
return true;
|
||
|
||
htab->got_list = got_list;
|
||
}
|
||
|
||
cur_got_obj = got_list;
|
||
if (cur_got_obj == NULL)
|
||
return false;
|
||
|
||
if (may_merge)
|
||
{
|
||
i = alpha_elf_tdata(cur_got_obj)->got_link_next;
|
||
while (i != NULL)
|
||
{
|
||
if (elf64_alpha_can_merge_gots (cur_got_obj, i))
|
||
{
|
||
elf64_alpha_merge_gots (cur_got_obj, i);
|
||
|
||
alpha_elf_tdata(i)->got->size = 0;
|
||
i = alpha_elf_tdata(i)->got_link_next;
|
||
alpha_elf_tdata(cur_got_obj)->got_link_next = i;
|
||
}
|
||
else
|
||
{
|
||
cur_got_obj = i;
|
||
i = alpha_elf_tdata(i)->got_link_next;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Once the gots have been merged, fill in the got offsets for
|
||
everything therein. */
|
||
elf64_alpha_calc_got_offsets (info);
|
||
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_size_plt_section_1 (struct alpha_elf_link_hash_entry *h,
|
||
void * data)
|
||
{
|
||
asection *splt = (asection *) data;
|
||
struct alpha_elf_got_entry *gotent;
|
||
bool saw_one = false;
|
||
|
||
/* If we didn't need an entry before, we still don't. */
|
||
if (!h->root.needs_plt)
|
||
return true;
|
||
|
||
/* For each LITERAL got entry still in use, allocate a plt entry. */
|
||
for (gotent = h->got_entries; gotent ; gotent = gotent->next)
|
||
if (gotent->reloc_type == R_ALPHA_LITERAL
|
||
&& gotent->use_count > 0)
|
||
{
|
||
if (splt->size == 0)
|
||
splt->size = PLT_HEADER_SIZE;
|
||
gotent->plt_offset = splt->size;
|
||
splt->size += PLT_ENTRY_SIZE;
|
||
saw_one = true;
|
||
}
|
||
|
||
/* If there weren't any, there's no longer a need for the PLT entry. */
|
||
if (!saw_one)
|
||
h->root.needs_plt = false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Called from relax_section to rebuild the PLT in light of potential changes
|
||
in the function's status. */
|
||
|
||
static void
|
||
elf64_alpha_size_plt_section (struct bfd_link_info *info)
|
||
{
|
||
asection *splt, *spltrel, *sgotplt;
|
||
unsigned long entries;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return;
|
||
|
||
splt = elf_hash_table(info)->splt;
|
||
if (splt == NULL)
|
||
return;
|
||
|
||
splt->size = 0;
|
||
|
||
alpha_elf_link_hash_traverse (htab,
|
||
elf64_alpha_size_plt_section_1, splt);
|
||
|
||
/* Every plt entry requires a JMP_SLOT relocation. */
|
||
spltrel = elf_hash_table(info)->srelplt;
|
||
entries = 0;
|
||
if (splt->size)
|
||
{
|
||
if (elf64_alpha_use_secureplt)
|
||
entries = (splt->size - NEW_PLT_HEADER_SIZE) / NEW_PLT_ENTRY_SIZE;
|
||
else
|
||
entries = (splt->size - OLD_PLT_HEADER_SIZE) / OLD_PLT_ENTRY_SIZE;
|
||
}
|
||
spltrel->size = entries * sizeof (Elf64_External_Rela);
|
||
|
||
/* When using the secureplt, we need two words somewhere in the data
|
||
segment for the dynamic linker to tell us where to go. This is the
|
||
entire contents of the .got.plt section. */
|
||
if (elf64_alpha_use_secureplt)
|
||
{
|
||
sgotplt = elf_hash_table(info)->sgotplt;
|
||
sgotplt->size = entries ? 16 : 0;
|
||
}
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_early_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *i;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
if (bfd_link_relocatable (info))
|
||
return true;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return false;
|
||
|
||
if (!elf64_alpha_size_got_sections (info, true))
|
||
return false;
|
||
|
||
/* Allocate space for all of the .got subsections. */
|
||
i = htab->got_list;
|
||
for ( ; i ; i = alpha_elf_tdata(i)->got_link_next)
|
||
{
|
||
asection *s = alpha_elf_tdata(i)->got;
|
||
if (s->size > 0)
|
||
{
|
||
s->contents = (bfd_byte *) bfd_zalloc (i, s->size);
|
||
if (s->contents == NULL)
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The number of dynamic relocations required by a static relocation. */
|
||
|
||
static int
|
||
alpha_dynamic_entries_for_reloc (int r_type, int dynamic, int shared, int pie)
|
||
{
|
||
switch (r_type)
|
||
{
|
||
/* May appear in GOT entries. */
|
||
case R_ALPHA_TLSGD:
|
||
return (dynamic ? 2 : shared ? 1 : 0);
|
||
case R_ALPHA_TLSLDM:
|
||
return shared;
|
||
case R_ALPHA_LITERAL:
|
||
return dynamic || shared;
|
||
case R_ALPHA_GOTTPREL:
|
||
return dynamic || (shared && !pie);
|
||
case R_ALPHA_GOTDTPREL:
|
||
return dynamic;
|
||
|
||
/* May appear in data sections. */
|
||
case R_ALPHA_REFLONG:
|
||
case R_ALPHA_REFQUAD:
|
||
return dynamic || shared;
|
||
case R_ALPHA_TPREL64:
|
||
return dynamic || (shared && !pie);
|
||
|
||
/* Everything else is illegal. We'll issue an error during
|
||
relocate_section. */
|
||
default:
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
/* Work out the sizes of the dynamic relocation entries. */
|
||
|
||
static bool
|
||
elf64_alpha_calc_dynrel_sizes (struct alpha_elf_link_hash_entry *h,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bool dynamic;
|
||
struct alpha_elf_reloc_entry *relent;
|
||
unsigned long entries;
|
||
|
||
/* If the symbol was defined as a common symbol in a regular object
|
||
file, and there was no definition in any dynamic object, then the
|
||
linker will have allocated space for the symbol in a common
|
||
section but the ELF_LINK_HASH_DEF_REGULAR flag will not have been
|
||
set. This is done for dynamic symbols in
|
||
elf_adjust_dynamic_symbol but this is not done for non-dynamic
|
||
symbols, somehow. */
|
||
if (!h->root.def_regular
|
||
&& h->root.ref_regular
|
||
&& !h->root.def_dynamic
|
||
&& (h->root.root.type == bfd_link_hash_defined
|
||
|| h->root.root.type == bfd_link_hash_defweak)
|
||
&& !(h->root.root.u.def.section->owner->flags & DYNAMIC))
|
||
h->root.def_regular = 1;
|
||
|
||
/* If the symbol is dynamic, we'll need all the relocations in their
|
||
natural form. If this is a shared object, and it has been forced
|
||
local, we'll need the same number of RELATIVE relocations. */
|
||
dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
|
||
|
||
/* If the symbol is a hidden undefined weak, then we never have any
|
||
relocations. Avoid the loop which may want to add RELATIVE relocs
|
||
based on bfd_link_pic (info). */
|
||
if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
|
||
return true;
|
||
|
||
for (relent = h->reloc_entries; relent; relent = relent->next)
|
||
{
|
||
entries = alpha_dynamic_entries_for_reloc (relent->rtype, dynamic,
|
||
bfd_link_pic (info),
|
||
bfd_link_pie (info));
|
||
if (entries)
|
||
{
|
||
asection *sec = relent->sec;
|
||
relent->srel->size +=
|
||
entries * sizeof (Elf64_External_Rela) * relent->count;
|
||
if ((sec->flags & SEC_READONLY) != 0)
|
||
{
|
||
info->flags |= DT_TEXTREL;
|
||
info->callbacks->minfo
|
||
(_("%pB: dynamic relocation against `%pT' in "
|
||
"read-only section `%pA'\n"),
|
||
sec->owner, h->root.root.root.string, sec);
|
||
}
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Subroutine of elf64_alpha_size_rela_got_section for doing the
|
||
global symbols. */
|
||
|
||
static bool
|
||
elf64_alpha_size_rela_got_1 (struct alpha_elf_link_hash_entry *h,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bool dynamic;
|
||
struct alpha_elf_got_entry *gotent;
|
||
unsigned long entries;
|
||
|
||
/* If we're using a plt for this symbol, then all of its relocations
|
||
for its got entries go into .rela.plt. */
|
||
if (h->root.needs_plt)
|
||
return true;
|
||
|
||
/* If the symbol is dynamic, we'll need all the relocations in their
|
||
natural form. If this is a shared object, and it has been forced
|
||
local, we'll need the same number of RELATIVE relocations. */
|
||
dynamic = alpha_elf_dynamic_symbol_p (&h->root, info);
|
||
|
||
/* If the symbol is a hidden undefined weak, then we never have any
|
||
relocations. Avoid the loop which may want to add RELATIVE relocs
|
||
based on bfd_link_pic (info). */
|
||
if (h->root.root.type == bfd_link_hash_undefweak && !dynamic)
|
||
return true;
|
||
|
||
entries = 0;
|
||
for (gotent = h->got_entries; gotent ; gotent = gotent->next)
|
||
if (gotent->use_count > 0)
|
||
entries += alpha_dynamic_entries_for_reloc (gotent->reloc_type, dynamic,
|
||
bfd_link_pic (info),
|
||
bfd_link_pie (info));
|
||
|
||
if (entries > 0)
|
||
{
|
||
asection *srel = elf_hash_table(info)->srelgot;
|
||
BFD_ASSERT (srel != NULL);
|
||
srel->size += sizeof (Elf64_External_Rela) * entries;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic relocation sections. */
|
||
|
||
static void
|
||
elf64_alpha_size_rela_got_section (struct bfd_link_info *info)
|
||
{
|
||
unsigned long entries;
|
||
bfd *i;
|
||
asection *srel;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return;
|
||
|
||
/* Shared libraries often require RELATIVE relocs, and some relocs
|
||
require attention for the main application as well. */
|
||
|
||
entries = 0;
|
||
for (i = htab->got_list;
|
||
i ; i = alpha_elf_tdata(i)->got_link_next)
|
||
{
|
||
bfd *j;
|
||
|
||
for (j = i; j ; j = alpha_elf_tdata(j)->in_got_link_next)
|
||
{
|
||
struct alpha_elf_got_entry **local_got_entries, *gotent;
|
||
int k, n;
|
||
|
||
local_got_entries = alpha_elf_tdata(j)->local_got_entries;
|
||
if (!local_got_entries)
|
||
continue;
|
||
|
||
for (k = 0, n = elf_tdata(j)->symtab_hdr.sh_info; k < n; ++k)
|
||
for (gotent = local_got_entries[k];
|
||
gotent ; gotent = gotent->next)
|
||
if (gotent->use_count > 0)
|
||
entries += (alpha_dynamic_entries_for_reloc
|
||
(gotent->reloc_type, 0, bfd_link_pic (info),
|
||
bfd_link_pie (info)));
|
||
}
|
||
}
|
||
|
||
srel = elf_hash_table(info)->srelgot;
|
||
if (!srel)
|
||
{
|
||
BFD_ASSERT (entries == 0);
|
||
return;
|
||
}
|
||
srel->size = sizeof (Elf64_External_Rela) * entries;
|
||
|
||
/* Now do the non-local symbols. */
|
||
alpha_elf_link_hash_traverse (htab,
|
||
elf64_alpha_size_rela_got_1, info);
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static bool
|
||
elf64_alpha_late_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bool relplt, relocs;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return false;
|
||
|
||
dynobj = elf_hash_table(info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return true;
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (bfd_link_executable (info) && !info->nointerp)
|
||
{
|
||
s = bfd_get_linker_section (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
|
||
/* Now that we've seen all of the input files, we can decide which
|
||
symbols need dynamic relocation entries and which don't. We've
|
||
collected information in check_relocs that we can now apply to
|
||
size the dynamic relocation sections. */
|
||
alpha_elf_link_hash_traverse (htab,
|
||
elf64_alpha_calc_dynrel_sizes, info);
|
||
|
||
elf64_alpha_size_rela_got_section (info);
|
||
elf64_alpha_size_plt_section (info);
|
||
}
|
||
/* else we're not dynamic and by definition we don't need such things. */
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
relplt = false;
|
||
relocs = false;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
|
||
if (!(s->flags & SEC_LINKER_CREATED))
|
||
continue;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_section_name (s);
|
||
|
||
if (startswith (name, ".rela"))
|
||
{
|
||
if (s->size != 0)
|
||
{
|
||
if (strcmp (name, ".rela.plt") == 0)
|
||
relplt = true;
|
||
else
|
||
relocs = true;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (! startswith (name, ".got")
|
||
&& strcmp (name, ".plt") != 0
|
||
&& strcmp (name, ".dynbss") != 0)
|
||
{
|
||
/* It's not one of our dynamic sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (s->size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the output file.
|
||
This is to handle .rela.bss and .rela.plt. We must create it
|
||
in create_dynamic_sections, because it must be created before
|
||
the linker maps input sections to output sections. The
|
||
linker does that before adjust_dynamic_symbol is called, and
|
||
it is that function which decides whether anything needs to
|
||
go into these sections. */
|
||
if (!startswith (name, ".got"))
|
||
s->flags |= SEC_EXCLUDE;
|
||
}
|
||
else if ((s->flags & SEC_HAS_CONTENTS) != 0)
|
||
{
|
||
/* Allocate memory for the section contents. */
|
||
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
||
if (s->contents == NULL)
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in elf64_alpha_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
#define add_dynamic_entry(TAG, VAL) \
|
||
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
||
|
||
if (!_bfd_elf_add_dynamic_tags (output_bfd, info,
|
||
relocs || relplt))
|
||
return false;
|
||
|
||
if (relplt
|
||
&& elf64_alpha_use_secureplt
|
||
&& !add_dynamic_entry (DT_ALPHA_PLTRO, 1))
|
||
return false;
|
||
}
|
||
#undef add_dynamic_entry
|
||
|
||
return true;
|
||
}
|
||
|
||
/* These functions do relaxation for Alpha ELF.
|
||
|
||
Currently I'm only handling what I can do with existing compiler
|
||
and assembler support, which means no instructions are removed,
|
||
though some may be nopped. At this time GCC does not emit enough
|
||
information to do all of the relaxing that is possible. It will
|
||
take some not small amount of work for that to happen.
|
||
|
||
There are a couple of interesting papers that I once read on this
|
||
subject, that I cannot find references to at the moment, that
|
||
related to Alpha in particular. They are by David Wall, then of
|
||
DEC WRL. */
|
||
|
||
struct alpha_relax_info
|
||
{
|
||
bfd *abfd;
|
||
asection *sec;
|
||
bfd_byte *contents;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Rela *relocs, *relend;
|
||
struct bfd_link_info *link_info;
|
||
bfd_vma gp;
|
||
bfd *gotobj;
|
||
asection *tsec;
|
||
struct alpha_elf_link_hash_entry *h;
|
||
struct alpha_elf_got_entry **first_gotent;
|
||
struct alpha_elf_got_entry *gotent;
|
||
bool changed_contents;
|
||
bool changed_relocs;
|
||
unsigned char other;
|
||
};
|
||
|
||
static Elf_Internal_Rela *
|
||
elf64_alpha_find_reloc_at_ofs (Elf_Internal_Rela *rel,
|
||
Elf_Internal_Rela *relend,
|
||
bfd_vma offset, int type)
|
||
{
|
||
while (rel < relend)
|
||
{
|
||
if (rel->r_offset == offset
|
||
&& ELF64_R_TYPE (rel->r_info) == (unsigned int) type)
|
||
return rel;
|
||
++rel;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_relax_got_load (struct alpha_relax_info *info, bfd_vma symval,
|
||
Elf_Internal_Rela *irel, unsigned long r_type)
|
||
{
|
||
unsigned int insn;
|
||
bfd_signed_vma disp;
|
||
|
||
/* Get the instruction. */
|
||
insn = bfd_get_32 (info->abfd, info->contents + irel->r_offset);
|
||
|
||
if (insn >> 26 != OP_LDQ)
|
||
{
|
||
reloc_howto_type *howto = elf64_alpha_howto_table + r_type;
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: %pA+%#" PRIx64 ": warning: "
|
||
"%s relocation against unexpected insn"),
|
||
info->abfd, info->sec, (uint64_t) irel->r_offset, howto->name);
|
||
return true;
|
||
}
|
||
|
||
/* Can't relax dynamic symbols. */
|
||
if (info->h != NULL
|
||
&& alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
|
||
return true;
|
||
|
||
/* Can't use local-exec relocations in shared libraries. */
|
||
if (r_type == R_ALPHA_GOTTPREL
|
||
&& bfd_link_dll (info->link_info))
|
||
return true;
|
||
|
||
if (r_type == R_ALPHA_LITERAL)
|
||
{
|
||
/* Look for nice constant addresses. This includes the not-uncommon
|
||
special case of 0 for undefweak symbols. */
|
||
if ((info->h && info->h->root.root.type == bfd_link_hash_undefweak)
|
||
|| (!bfd_link_pic (info->link_info)
|
||
&& (symval >= (bfd_vma)-0x8000 || symval < 0x8000)))
|
||
{
|
||
disp = 0;
|
||
insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
|
||
insn |= (symval & 0xffff);
|
||
r_type = R_ALPHA_NONE;
|
||
}
|
||
else
|
||
{
|
||
/* We may only create GPREL relocs during the second pass. */
|
||
if (info->link_info->relax_pass == 0)
|
||
return true;
|
||
|
||
disp = symval - info->gp;
|
||
insn = (OP_LDA << 26) | (insn & 0x03ff0000);
|
||
r_type = R_ALPHA_GPREL16;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
bfd_vma dtp_base, tp_base;
|
||
|
||
BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
|
||
dtp_base = alpha_get_dtprel_base (info->link_info);
|
||
tp_base = alpha_get_tprel_base (info->link_info);
|
||
disp = symval - (r_type == R_ALPHA_GOTDTPREL ? dtp_base : tp_base);
|
||
|
||
insn = (OP_LDA << 26) | (insn & (31 << 21)) | (31 << 16);
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_ALPHA_GOTDTPREL:
|
||
r_type = R_ALPHA_DTPREL16;
|
||
break;
|
||
case R_ALPHA_GOTTPREL:
|
||
r_type = R_ALPHA_TPREL16;
|
||
break;
|
||
default:
|
||
BFD_ASSERT (0);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (disp < -0x8000 || disp >= 0x8000)
|
||
return true;
|
||
|
||
bfd_put_32 (info->abfd, (bfd_vma) insn, info->contents + irel->r_offset);
|
||
info->changed_contents = true;
|
||
|
||
/* Reduce the use count on this got entry by one, possibly
|
||
eliminating it. */
|
||
if (--info->gotent->use_count == 0)
|
||
{
|
||
int sz = alpha_got_entry_size (r_type);
|
||
alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
|
||
if (!info->h)
|
||
alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
|
||
}
|
||
|
||
/* Smash the existing GOT relocation for its 16-bit immediate pair. */
|
||
irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info), r_type);
|
||
info->changed_relocs = true;
|
||
|
||
/* ??? Search forward through this basic block looking for insns
|
||
that use the target register. Stop after an insn modifying the
|
||
register is seen, or after a branch or call.
|
||
|
||
Any such memory load insn may be substituted by a load directly
|
||
off the GP. This allows the memory load insn to be issued before
|
||
the calculated GP register would otherwise be ready.
|
||
|
||
Any such jsr insn can be replaced by a bsr if it is in range.
|
||
|
||
This would mean that we'd have to _add_ relocations, the pain of
|
||
which gives one pause. */
|
||
|
||
return true;
|
||
}
|
||
|
||
static bfd_vma
|
||
elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
|
||
{
|
||
/* If the function has the same gp, and we can identify that the
|
||
function does not use its function pointer, we can eliminate the
|
||
address load. */
|
||
|
||
/* If the symbol is marked NOPV, we are being told the function never
|
||
needs its procedure value. */
|
||
if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_NOPV)
|
||
return symval;
|
||
|
||
/* If the symbol is marked STD_GP, we are being told the function does
|
||
a normal ldgp in the first two words. */
|
||
else if ((info->other & STO_ALPHA_STD_GPLOAD) == STO_ALPHA_STD_GPLOAD)
|
||
;
|
||
|
||
/* Otherwise, we may be able to identify a GP load in the first two
|
||
words, which we can then skip. */
|
||
else
|
||
{
|
||
Elf_Internal_Rela *tsec_relocs, *tsec_relend, *tsec_free, *gpdisp;
|
||
bfd_vma ofs;
|
||
|
||
/* Load the relocations from the section that the target symbol is in. */
|
||
if (info->sec == info->tsec)
|
||
{
|
||
tsec_relocs = info->relocs;
|
||
tsec_relend = info->relend;
|
||
tsec_free = NULL;
|
||
}
|
||
else
|
||
{
|
||
tsec_relocs = (_bfd_elf_link_read_relocs
|
||
(info->abfd, info->tsec, NULL,
|
||
(Elf_Internal_Rela *) NULL,
|
||
info->link_info->keep_memory));
|
||
if (tsec_relocs == NULL)
|
||
return 0;
|
||
tsec_relend = tsec_relocs + info->tsec->reloc_count;
|
||
tsec_free = (elf_section_data (info->tsec)->relocs == tsec_relocs
|
||
? NULL
|
||
: tsec_relocs);
|
||
}
|
||
|
||
/* Recover the symbol's offset within the section. */
|
||
ofs = (symval - info->tsec->output_section->vma
|
||
- info->tsec->output_offset);
|
||
|
||
/* Look for a GPDISP reloc. */
|
||
gpdisp = (elf64_alpha_find_reloc_at_ofs
|
||
(tsec_relocs, tsec_relend, ofs, R_ALPHA_GPDISP));
|
||
|
||
if (!gpdisp || gpdisp->r_addend != 4)
|
||
{
|
||
free (tsec_free);
|
||
return 0;
|
||
}
|
||
free (tsec_free);
|
||
}
|
||
|
||
/* We've now determined that we can skip an initial gp load. Verify
|
||
that the call and the target use the same gp. */
|
||
if (info->link_info->output_bfd->xvec != info->tsec->owner->xvec
|
||
|| info->gotobj != alpha_elf_tdata (info->tsec->owner)->gotobj)
|
||
return 0;
|
||
|
||
return symval + 8;
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_relax_with_lituse (struct alpha_relax_info *info,
|
||
bfd_vma symval, Elf_Internal_Rela *irel)
|
||
{
|
||
Elf_Internal_Rela *urel, *erel, *irelend = info->relend;
|
||
int flags;
|
||
bfd_signed_vma disp;
|
||
bool fits16;
|
||
bool fits32;
|
||
bool lit_reused = false;
|
||
bool all_optimized = true;
|
||
bool changed_contents;
|
||
bool changed_relocs;
|
||
bfd_byte *contents = info->contents;
|
||
bfd *abfd = info->abfd;
|
||
bfd_vma sec_output_vma;
|
||
unsigned int lit_insn;
|
||
int relax_pass;
|
||
|
||
lit_insn = bfd_get_32 (abfd, contents + irel->r_offset);
|
||
if (lit_insn >> 26 != OP_LDQ)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: %pA+%#" PRIx64 ": warning: "
|
||
"%s relocation against unexpected insn"),
|
||
abfd, info->sec, (uint64_t) irel->r_offset, "LITERAL");
|
||
return true;
|
||
}
|
||
|
||
/* Can't relax dynamic symbols. */
|
||
if (info->h != NULL
|
||
&& alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info))
|
||
return true;
|
||
|
||
changed_contents = info->changed_contents;
|
||
changed_relocs = info->changed_relocs;
|
||
sec_output_vma = info->sec->output_section->vma + info->sec->output_offset;
|
||
relax_pass = info->link_info->relax_pass;
|
||
|
||
/* Summarize how this particular LITERAL is used. */
|
||
for (erel = irel+1, flags = 0; erel < irelend; ++erel)
|
||
{
|
||
if (ELF64_R_TYPE (erel->r_info) != R_ALPHA_LITUSE)
|
||
break;
|
||
if (erel->r_addend <= 6)
|
||
flags |= 1 << erel->r_addend;
|
||
}
|
||
|
||
/* A little preparation for the loop... */
|
||
disp = symval - info->gp;
|
||
|
||
for (urel = irel+1; urel < erel; ++urel)
|
||
{
|
||
bfd_vma urel_r_offset = urel->r_offset;
|
||
unsigned int insn;
|
||
int insn_disp;
|
||
bfd_signed_vma xdisp;
|
||
Elf_Internal_Rela nrel;
|
||
|
||
insn = bfd_get_32 (abfd, contents + urel_r_offset);
|
||
|
||
switch (urel->r_addend)
|
||
{
|
||
case LITUSE_ALPHA_ADDR:
|
||
default:
|
||
/* This type is really just a placeholder to note that all
|
||
uses cannot be optimized, but to still allow some. */
|
||
all_optimized = false;
|
||
break;
|
||
|
||
case LITUSE_ALPHA_BASE:
|
||
/* We may only create GPREL relocs during the second pass. */
|
||
if (relax_pass == 0)
|
||
{
|
||
all_optimized = false;
|
||
break;
|
||
}
|
||
|
||
/* We can always optimize 16-bit displacements. */
|
||
|
||
/* Extract the displacement from the instruction, sign-extending
|
||
it if necessary, then test whether it is within 16 or 32 bits
|
||
displacement from GP. */
|
||
insn_disp = ((insn & 0xffff) ^ 0x8000) - 0x8000;
|
||
|
||
xdisp = disp + insn_disp;
|
||
fits16 = (xdisp >= - (bfd_signed_vma) 0x8000 && xdisp < 0x8000);
|
||
fits32 = (xdisp >= - (bfd_signed_vma) 0x80000000
|
||
&& xdisp < 0x7fff8000);
|
||
|
||
if (fits16)
|
||
{
|
||
/* Take the op code and dest from this insn, take the base
|
||
register from the literal insn. Leave the offset alone. */
|
||
insn = (insn & 0xffe0ffff) | (lit_insn & 0x001f0000);
|
||
bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
|
||
changed_contents = true;
|
||
|
||
nrel = *urel;
|
||
nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
|
||
R_ALPHA_GPREL16);
|
||
nrel.r_addend = irel->r_addend;
|
||
|
||
/* As we adjust, move the reloc to the end so that we don't
|
||
break the LITERAL+LITUSE chain. */
|
||
if (urel < --erel)
|
||
*urel-- = *erel;
|
||
*erel = nrel;
|
||
changed_relocs = true;
|
||
}
|
||
|
||
/* If all mem+byte, we can optimize 32-bit mem displacements. */
|
||
else if (fits32 && !(flags & ~6))
|
||
{
|
||
/* FIXME: sanity check that lit insn Ra is mem insn Rb. */
|
||
|
||
irel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
|
||
R_ALPHA_GPRELHIGH);
|
||
lit_insn = (OP_LDAH << 26) | (lit_insn & 0x03ff0000);
|
||
bfd_put_32 (abfd, (bfd_vma) lit_insn, contents + irel->r_offset);
|
||
lit_reused = true;
|
||
changed_contents = true;
|
||
|
||
/* Since all relocs must be optimized, don't bother swapping
|
||
this relocation to the end. */
|
||
urel->r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
|
||
R_ALPHA_GPRELLOW);
|
||
urel->r_addend = irel->r_addend;
|
||
changed_relocs = true;
|
||
}
|
||
else
|
||
all_optimized = false;
|
||
break;
|
||
|
||
case LITUSE_ALPHA_BYTOFF:
|
||
/* We can always optimize byte instructions. */
|
||
|
||
/* FIXME: sanity check the insn for byte op. Check that the
|
||
literal dest reg is indeed Rb in the byte insn. */
|
||
|
||
insn &= ~ (unsigned) 0x001ff000;
|
||
insn |= ((symval & 7) << 13) | 0x1000;
|
||
bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
|
||
changed_contents = true;
|
||
|
||
nrel = *urel;
|
||
nrel.r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
nrel.r_addend = 0;
|
||
|
||
/* As we adjust, move the reloc to the end so that we don't
|
||
break the LITERAL+LITUSE chain. */
|
||
if (urel < --erel)
|
||
*urel-- = *erel;
|
||
*erel = nrel;
|
||
changed_relocs = true;
|
||
break;
|
||
|
||
case LITUSE_ALPHA_JSR:
|
||
case LITUSE_ALPHA_TLSGD:
|
||
case LITUSE_ALPHA_TLSLDM:
|
||
case LITUSE_ALPHA_JSRDIRECT:
|
||
{
|
||
bfd_vma optdest, org;
|
||
bfd_signed_vma odisp;
|
||
|
||
/* For undefined weak symbols, we're mostly interested in getting
|
||
rid of the got entry whenever possible, so optimize this to a
|
||
use of the zero register. */
|
||
if (info->h && info->h->root.root.type == bfd_link_hash_undefweak)
|
||
{
|
||
insn |= 31 << 16;
|
||
bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
|
||
|
||
changed_contents = true;
|
||
break;
|
||
}
|
||
|
||
/* If not zero, place to jump without needing pv. */
|
||
optdest = elf64_alpha_relax_opt_call (info, symval);
|
||
org = sec_output_vma + urel_r_offset + 4;
|
||
odisp = (optdest ? optdest : symval) - org;
|
||
|
||
if (odisp >= -0x400000 && odisp < 0x400000)
|
||
{
|
||
Elf_Internal_Rela *xrel;
|
||
|
||
/* Preserve branch prediction call stack when possible. */
|
||
if ((insn & INSN_JSR_MASK) == INSN_JSR)
|
||
insn = (OP_BSR << 26) | (insn & 0x03e00000);
|
||
else
|
||
insn = (OP_BR << 26) | (insn & 0x03e00000);
|
||
bfd_put_32 (abfd, (bfd_vma) insn, contents + urel_r_offset);
|
||
changed_contents = true;
|
||
|
||
nrel = *urel;
|
||
nrel.r_info = ELF64_R_INFO (ELF64_R_SYM (irel->r_info),
|
||
R_ALPHA_BRADDR);
|
||
nrel.r_addend = irel->r_addend;
|
||
|
||
if (optdest)
|
||
nrel.r_addend += optdest - symval;
|
||
else
|
||
all_optimized = false;
|
||
|
||
/* Kill any HINT reloc that might exist for this insn. */
|
||
xrel = (elf64_alpha_find_reloc_at_ofs
|
||
(info->relocs, info->relend, urel_r_offset,
|
||
R_ALPHA_HINT));
|
||
if (xrel)
|
||
xrel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
|
||
/* As we adjust, move the reloc to the end so that we don't
|
||
break the LITERAL+LITUSE chain. */
|
||
if (urel < --erel)
|
||
*urel-- = *erel;
|
||
*erel = nrel;
|
||
|
||
info->changed_relocs = true;
|
||
}
|
||
else
|
||
all_optimized = false;
|
||
|
||
/* Even if the target is not in range for a direct branch,
|
||
if we share a GP, we can eliminate the gp reload. */
|
||
if (optdest)
|
||
{
|
||
Elf_Internal_Rela *gpdisp
|
||
= (elf64_alpha_find_reloc_at_ofs
|
||
(info->relocs, irelend, urel_r_offset + 4,
|
||
R_ALPHA_GPDISP));
|
||
if (gpdisp)
|
||
{
|
||
bfd_byte *p_ldah = contents + gpdisp->r_offset;
|
||
bfd_byte *p_lda = p_ldah + gpdisp->r_addend;
|
||
unsigned int ldah = bfd_get_32 (abfd, p_ldah);
|
||
unsigned int lda = bfd_get_32 (abfd, p_lda);
|
||
|
||
/* Verify that the instruction is "ldah $29,0($26)".
|
||
Consider a function that ends in a noreturn call,
|
||
and that the next function begins with an ldgp,
|
||
and that by accident there is no padding between.
|
||
In that case the insn would use $27 as the base. */
|
||
if (ldah == 0x27ba0000 && lda == 0x23bd0000)
|
||
{
|
||
bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_ldah);
|
||
bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, p_lda);
|
||
|
||
gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
changed_contents = true;
|
||
changed_relocs = true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* If we reused the literal instruction, we must have optimized all. */
|
||
BFD_ASSERT(!lit_reused || all_optimized);
|
||
|
||
/* If all cases were optimized, we can reduce the use count on this
|
||
got entry by one, possibly eliminating it. */
|
||
if (all_optimized)
|
||
{
|
||
if (--info->gotent->use_count == 0)
|
||
{
|
||
int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
|
||
alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
|
||
if (!info->h)
|
||
alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
|
||
}
|
||
|
||
/* If the literal instruction is no longer needed (it may have been
|
||
reused. We can eliminate it. */
|
||
/* ??? For now, I don't want to deal with compacting the section,
|
||
so just nop it out. */
|
||
if (!lit_reused)
|
||
{
|
||
irel->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
changed_relocs = true;
|
||
|
||
bfd_put_32 (abfd, (bfd_vma) INSN_UNOP, contents + irel->r_offset);
|
||
changed_contents = true;
|
||
}
|
||
}
|
||
|
||
info->changed_contents = changed_contents;
|
||
info->changed_relocs = changed_relocs;
|
||
|
||
if (all_optimized || relax_pass == 0)
|
||
return true;
|
||
return elf64_alpha_relax_got_load (info, symval, irel, R_ALPHA_LITERAL);
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_relax_tls_get_addr (struct alpha_relax_info *info, bfd_vma symval,
|
||
Elf_Internal_Rela *irel, bool is_gd)
|
||
{
|
||
bfd_byte *pos[5];
|
||
unsigned int insn, tlsgd_reg;
|
||
Elf_Internal_Rela *gpdisp, *hint;
|
||
bool dynamic, use_gottprel;
|
||
unsigned long new_symndx;
|
||
|
||
dynamic = (info->h != NULL
|
||
&& alpha_elf_dynamic_symbol_p (&info->h->root, info->link_info));
|
||
|
||
/* If a TLS symbol is accessed using IE at least once, there is no point
|
||
to use dynamic model for it. */
|
||
if (is_gd && info->h && (info->h->flags & ALPHA_ELF_LINK_HASH_TLS_IE))
|
||
;
|
||
|
||
/* If the symbol is local, and we've already committed to DF_STATIC_TLS,
|
||
then we might as well relax to IE. */
|
||
else if (bfd_link_pic (info->link_info) && !dynamic
|
||
&& (info->link_info->flags & DF_STATIC_TLS))
|
||
;
|
||
|
||
/* Otherwise we must be building an executable to do anything. */
|
||
else if (bfd_link_pic (info->link_info))
|
||
return true;
|
||
|
||
/* The TLSGD/TLSLDM relocation must be followed by a LITERAL and
|
||
the matching LITUSE_TLS relocations. */
|
||
if (irel + 2 >= info->relend)
|
||
return true;
|
||
if (ELF64_R_TYPE (irel[1].r_info) != R_ALPHA_LITERAL
|
||
|| ELF64_R_TYPE (irel[2].r_info) != R_ALPHA_LITUSE
|
||
|| irel[2].r_addend != (is_gd ? LITUSE_ALPHA_TLSGD : LITUSE_ALPHA_TLSLDM))
|
||
return true;
|
||
|
||
/* There must be a GPDISP relocation positioned immediately after the
|
||
LITUSE relocation. */
|
||
gpdisp = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
|
||
irel[2].r_offset + 4, R_ALPHA_GPDISP);
|
||
if (!gpdisp)
|
||
return true;
|
||
|
||
pos[0] = info->contents + irel[0].r_offset;
|
||
pos[1] = info->contents + irel[1].r_offset;
|
||
pos[2] = info->contents + irel[2].r_offset;
|
||
pos[3] = info->contents + gpdisp->r_offset;
|
||
pos[4] = pos[3] + gpdisp->r_addend;
|
||
|
||
/* Beware of the compiler hoisting part of the sequence out a loop
|
||
and adjusting the destination register for the TLSGD insn. If this
|
||
happens, there will be a move into $16 before the JSR insn, so only
|
||
transformations of the first insn pair should use this register. */
|
||
tlsgd_reg = bfd_get_32 (info->abfd, pos[0]);
|
||
tlsgd_reg = (tlsgd_reg >> 21) & 31;
|
||
|
||
/* Generally, the positions are not allowed to be out of order, lest the
|
||
modified insn sequence have different register lifetimes. We can make
|
||
an exception when pos 1 is adjacent to pos 0. */
|
||
if (pos[1] + 4 == pos[0])
|
||
{
|
||
bfd_byte *tmp = pos[0];
|
||
pos[0] = pos[1];
|
||
pos[1] = tmp;
|
||
}
|
||
if (pos[1] >= pos[2] || pos[2] >= pos[3])
|
||
return true;
|
||
|
||
/* Reduce the use count on the LITERAL relocation. Do this before we
|
||
smash the symndx when we adjust the relocations below. */
|
||
{
|
||
struct alpha_elf_got_entry *lit_gotent;
|
||
struct alpha_elf_link_hash_entry *lit_h;
|
||
unsigned long indx;
|
||
|
||
BFD_ASSERT (ELF64_R_SYM (irel[1].r_info) >= info->symtab_hdr->sh_info);
|
||
indx = ELF64_R_SYM (irel[1].r_info) - info->symtab_hdr->sh_info;
|
||
lit_h = alpha_elf_sym_hashes (info->abfd)[indx];
|
||
|
||
while (lit_h->root.root.type == bfd_link_hash_indirect
|
||
|| lit_h->root.root.type == bfd_link_hash_warning)
|
||
lit_h = (struct alpha_elf_link_hash_entry *) lit_h->root.root.u.i.link;
|
||
|
||
for (lit_gotent = lit_h->got_entries; lit_gotent ;
|
||
lit_gotent = lit_gotent->next)
|
||
if (lit_gotent->gotobj == info->gotobj
|
||
&& lit_gotent->reloc_type == R_ALPHA_LITERAL
|
||
&& lit_gotent->addend == irel[1].r_addend)
|
||
break;
|
||
BFD_ASSERT (lit_gotent);
|
||
|
||
if (--lit_gotent->use_count == 0)
|
||
{
|
||
int sz = alpha_got_entry_size (R_ALPHA_LITERAL);
|
||
alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
|
||
}
|
||
}
|
||
|
||
/* Change
|
||
|
||
lda $16,x($gp) !tlsgd!1
|
||
ldq $27,__tls_get_addr($gp) !literal!1
|
||
jsr $26,($27),__tls_get_addr !lituse_tlsgd!1
|
||
ldah $29,0($26) !gpdisp!2
|
||
lda $29,0($29) !gpdisp!2
|
||
to
|
||
ldq $16,x($gp) !gottprel
|
||
unop
|
||
call_pal rduniq
|
||
addq $16,$0,$0
|
||
unop
|
||
or the first pair to
|
||
lda $16,x($gp) !tprel
|
||
unop
|
||
or
|
||
ldah $16,x($gp) !tprelhi
|
||
lda $16,x($16) !tprello
|
||
|
||
as appropriate. */
|
||
|
||
use_gottprel = false;
|
||
new_symndx = is_gd ? ELF64_R_SYM (irel->r_info) : STN_UNDEF;
|
||
|
||
/* Some compilers warn about a Boolean-looking expression being
|
||
used in a switch. The explicit cast silences them. */
|
||
switch ((int) (!dynamic && !bfd_link_pic (info->link_info)))
|
||
{
|
||
case 1:
|
||
{
|
||
bfd_vma tp_base;
|
||
bfd_signed_vma disp;
|
||
|
||
BFD_ASSERT (elf_hash_table (info->link_info)->tls_sec != NULL);
|
||
tp_base = alpha_get_tprel_base (info->link_info);
|
||
disp = symval - tp_base;
|
||
|
||
if (disp >= -0x8000 && disp < 0x8000)
|
||
{
|
||
insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (31 << 16);
|
||
bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
|
||
bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
|
||
|
||
irel[0].r_offset = pos[0] - info->contents;
|
||
irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPREL16);
|
||
irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
break;
|
||
}
|
||
else if (disp >= -(bfd_signed_vma) 0x80000000
|
||
&& disp < (bfd_signed_vma) 0x7fff8000
|
||
&& pos[0] + 4 == pos[1])
|
||
{
|
||
insn = (OP_LDAH << 26) | (tlsgd_reg << 21) | (31 << 16);
|
||
bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
|
||
insn = (OP_LDA << 26) | (tlsgd_reg << 21) | (tlsgd_reg << 16);
|
||
bfd_put_32 (info->abfd, (bfd_vma) insn, pos[1]);
|
||
|
||
irel[0].r_offset = pos[0] - info->contents;
|
||
irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELHI);
|
||
irel[1].r_offset = pos[1] - info->contents;
|
||
irel[1].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_TPRELLO);
|
||
break;
|
||
}
|
||
}
|
||
/* FALLTHRU */
|
||
|
||
default:
|
||
use_gottprel = true;
|
||
|
||
insn = (OP_LDQ << 26) | (tlsgd_reg << 21) | (29 << 16);
|
||
bfd_put_32 (info->abfd, (bfd_vma) insn, pos[0]);
|
||
bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[1]);
|
||
|
||
irel[0].r_offset = pos[0] - info->contents;
|
||
irel[0].r_info = ELF64_R_INFO (new_symndx, R_ALPHA_GOTTPREL);
|
||
irel[1].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
break;
|
||
}
|
||
|
||
bfd_put_32 (info->abfd, (bfd_vma) INSN_RDUNIQ, pos[2]);
|
||
|
||
insn = INSN_ADDQ | (16 << 21) | (0 << 16) | (0 << 0);
|
||
bfd_put_32 (info->abfd, (bfd_vma) insn, pos[3]);
|
||
|
||
bfd_put_32 (info->abfd, (bfd_vma) INSN_UNOP, pos[4]);
|
||
|
||
irel[2].r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
gpdisp->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
|
||
hint = elf64_alpha_find_reloc_at_ofs (info->relocs, info->relend,
|
||
irel[2].r_offset, R_ALPHA_HINT);
|
||
if (hint)
|
||
hint->r_info = ELF64_R_INFO (0, R_ALPHA_NONE);
|
||
|
||
info->changed_contents = true;
|
||
info->changed_relocs = true;
|
||
|
||
/* Reduce the use count on the TLSGD/TLSLDM relocation. */
|
||
if (--info->gotent->use_count == 0)
|
||
{
|
||
int sz = alpha_got_entry_size (info->gotent->reloc_type);
|
||
alpha_elf_tdata (info->gotobj)->total_got_size -= sz;
|
||
if (!info->h)
|
||
alpha_elf_tdata (info->gotobj)->local_got_size -= sz;
|
||
}
|
||
|
||
/* If we've switched to a GOTTPREL relocation, increment the reference
|
||
count on that got entry. */
|
||
if (use_gottprel)
|
||
{
|
||
struct alpha_elf_got_entry *tprel_gotent;
|
||
|
||
for (tprel_gotent = *info->first_gotent; tprel_gotent ;
|
||
tprel_gotent = tprel_gotent->next)
|
||
if (tprel_gotent->gotobj == info->gotobj
|
||
&& tprel_gotent->reloc_type == R_ALPHA_GOTTPREL
|
||
&& tprel_gotent->addend == irel->r_addend)
|
||
break;
|
||
if (tprel_gotent)
|
||
tprel_gotent->use_count++;
|
||
else
|
||
{
|
||
if (info->gotent->use_count == 0)
|
||
tprel_gotent = info->gotent;
|
||
else
|
||
{
|
||
tprel_gotent = (struct alpha_elf_got_entry *)
|
||
bfd_alloc (info->abfd, sizeof (struct alpha_elf_got_entry));
|
||
if (!tprel_gotent)
|
||
return false;
|
||
|
||
tprel_gotent->next = *info->first_gotent;
|
||
*info->first_gotent = tprel_gotent;
|
||
|
||
tprel_gotent->gotobj = info->gotobj;
|
||
tprel_gotent->addend = irel->r_addend;
|
||
tprel_gotent->got_offset = -1;
|
||
tprel_gotent->reloc_done = 0;
|
||
tprel_gotent->reloc_xlated = 0;
|
||
}
|
||
|
||
tprel_gotent->use_count = 1;
|
||
tprel_gotent->reloc_type = R_ALPHA_GOTTPREL;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
elf64_alpha_relax_section (bfd *abfd, asection *sec,
|
||
struct bfd_link_info *link_info, bool *again)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Rela *internal_relocs;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
Elf_Internal_Sym *isymbuf = NULL;
|
||
struct alpha_elf_got_entry **local_got_entries;
|
||
struct alpha_relax_info info;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
int relax_pass;
|
||
|
||
htab = alpha_elf_hash_table (link_info);
|
||
if (htab == NULL)
|
||
return false;
|
||
|
||
/* There's nothing to change, yet. */
|
||
*again = false;
|
||
|
||
if (bfd_link_relocatable (link_info)
|
||
|| ((sec->flags & (SEC_CODE | SEC_RELOC | SEC_ALLOC | SEC_HAS_CONTENTS))
|
||
!= (SEC_CODE | SEC_RELOC | SEC_ALLOC | SEC_HAS_CONTENTS))
|
||
|| sec->reloc_count == 0)
|
||
return true;
|
||
|
||
BFD_ASSERT (is_alpha_elf (abfd));
|
||
relax_pass = link_info->relax_pass;
|
||
|
||
/* Make sure our GOT and PLT tables are up-to-date. */
|
||
if (htab->relax_trip != link_info->relax_trip)
|
||
{
|
||
htab->relax_trip = link_info->relax_trip;
|
||
|
||
/* This should never fail after the initial round, since the only error
|
||
is GOT overflow, and relaxation only shrinks the table. However, we
|
||
may only merge got sections during the first pass. If we merge
|
||
sections after we've created GPREL relocs, the GP for the merged
|
||
section backs up which may put the relocs out of range. */
|
||
if (!elf64_alpha_size_got_sections (link_info, relax_pass == 0))
|
||
abort ();
|
||
if (elf_hash_table (link_info)->dynamic_sections_created)
|
||
{
|
||
elf64_alpha_size_plt_section (link_info);
|
||
elf64_alpha_size_rela_got_section (link_info);
|
||
}
|
||
}
|
||
|
||
symtab_hdr = &elf_symtab_hdr (abfd);
|
||
local_got_entries = alpha_elf_tdata(abfd)->local_got_entries;
|
||
|
||
/* Load the relocations for this section. */
|
||
internal_relocs = (_bfd_elf_link_read_relocs
|
||
(abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
|
||
link_info->keep_memory));
|
||
if (internal_relocs == NULL)
|
||
return false;
|
||
|
||
memset(&info, 0, sizeof (info));
|
||
info.abfd = abfd;
|
||
info.sec = sec;
|
||
info.link_info = link_info;
|
||
info.symtab_hdr = symtab_hdr;
|
||
info.relocs = internal_relocs;
|
||
info.relend = irelend = internal_relocs + sec->reloc_count;
|
||
|
||
/* Find the GP for this object. Do not store the result back via
|
||
_bfd_set_gp_value, since this could change again before final. */
|
||
info.gotobj = alpha_elf_tdata (abfd)->gotobj;
|
||
if (info.gotobj)
|
||
{
|
||
asection *sgot = alpha_elf_tdata (info.gotobj)->got;
|
||
info.gp = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ 0x8000);
|
||
}
|
||
|
||
/* Get the section contents. */
|
||
if (elf_section_data (sec)->this_hdr.contents != NULL)
|
||
info.contents = elf_section_data (sec)->this_hdr.contents;
|
||
else
|
||
{
|
||
if (!bfd_malloc_and_get_section (abfd, sec, &info.contents))
|
||
goto error_return;
|
||
}
|
||
|
||
for (irel = internal_relocs; irel < irelend; irel++)
|
||
{
|
||
bfd_vma symval;
|
||
struct alpha_elf_got_entry *gotent;
|
||
unsigned long r_type = ELF64_R_TYPE (irel->r_info);
|
||
unsigned long r_symndx = ELF64_R_SYM (irel->r_info);
|
||
|
||
/* Early exit for unhandled or unrelaxable relocations. */
|
||
if (r_type != R_ALPHA_LITERAL)
|
||
{
|
||
/* We complete everything except LITERAL in the first pass. */
|
||
if (relax_pass != 0)
|
||
continue;
|
||
if (r_type == R_ALPHA_TLSLDM)
|
||
{
|
||
/* The symbol for a TLSLDM reloc is ignored. Collapse the
|
||
reloc to the STN_UNDEF (0) symbol so that they all match. */
|
||
r_symndx = STN_UNDEF;
|
||
}
|
||
else if (r_type != R_ALPHA_GOTDTPREL
|
||
&& r_type != R_ALPHA_GOTTPREL
|
||
&& r_type != R_ALPHA_TLSGD)
|
||
continue;
|
||
}
|
||
|
||
/* Get the value of the symbol referred to by the reloc. */
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
Elf_Internal_Sym *isym;
|
||
|
||
/* Read this BFD's local symbols. */
|
||
if (isymbuf == NULL)
|
||
{
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
if (isymbuf == NULL)
|
||
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
||
symtab_hdr->sh_info, 0,
|
||
NULL, NULL, NULL);
|
||
if (isymbuf == NULL)
|
||
goto error_return;
|
||
}
|
||
|
||
isym = isymbuf + r_symndx;
|
||
|
||
/* Given the symbol for a TLSLDM reloc is ignored, this also
|
||
means forcing the symbol value to the tp base. */
|
||
if (r_type == R_ALPHA_TLSLDM)
|
||
{
|
||
info.tsec = bfd_abs_section_ptr;
|
||
symval = alpha_get_tprel_base (info.link_info);
|
||
}
|
||
else
|
||
{
|
||
symval = isym->st_value;
|
||
if (isym->st_shndx == SHN_UNDEF)
|
||
continue;
|
||
else if (isym->st_shndx == SHN_ABS)
|
||
info.tsec = bfd_abs_section_ptr;
|
||
else if (isym->st_shndx == SHN_COMMON)
|
||
info.tsec = bfd_com_section_ptr;
|
||
else
|
||
info.tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
||
}
|
||
|
||
info.h = NULL;
|
||
info.other = isym->st_other;
|
||
if (local_got_entries)
|
||
info.first_gotent = &local_got_entries[r_symndx];
|
||
else
|
||
{
|
||
info.first_gotent = &info.gotent;
|
||
info.gotent = NULL;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct alpha_elf_link_hash_entry *h;
|
||
|
||
indx = r_symndx - symtab_hdr->sh_info;
|
||
h = alpha_elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
|
||
while (h->root.root.type == bfd_link_hash_indirect
|
||
|| h->root.root.type == bfd_link_hash_warning)
|
||
h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
|
||
|
||
/* If the symbol is undefined, we can't do anything with it. */
|
||
if (h->root.root.type == bfd_link_hash_undefined)
|
||
continue;
|
||
|
||
/* If the symbol isn't defined in the current module,
|
||
again we can't do anything. */
|
||
if (h->root.root.type == bfd_link_hash_undefweak)
|
||
{
|
||
info.tsec = bfd_abs_section_ptr;
|
||
symval = 0;
|
||
}
|
||
else if (!h->root.def_regular)
|
||
{
|
||
/* Except for TLSGD relocs, which can sometimes be
|
||
relaxed to GOTTPREL relocs. */
|
||
if (r_type != R_ALPHA_TLSGD)
|
||
continue;
|
||
info.tsec = bfd_abs_section_ptr;
|
||
symval = 0;
|
||
}
|
||
else
|
||
{
|
||
info.tsec = h->root.root.u.def.section;
|
||
symval = h->root.root.u.def.value;
|
||
}
|
||
|
||
info.h = h;
|
||
info.other = h->root.other;
|
||
info.first_gotent = &h->got_entries;
|
||
}
|
||
|
||
/* Search for the got entry to be used by this relocation. */
|
||
for (gotent = *info.first_gotent; gotent ; gotent = gotent->next)
|
||
if (gotent->gotobj == info.gotobj
|
||
&& gotent->reloc_type == r_type
|
||
&& gotent->addend == irel->r_addend)
|
||
break;
|
||
info.gotent = gotent;
|
||
|
||
symval += info.tsec->output_section->vma + info.tsec->output_offset;
|
||
symval += irel->r_addend;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_ALPHA_LITERAL:
|
||
BFD_ASSERT(info.gotent != NULL);
|
||
|
||
/* If there exist LITUSE relocations immediately following, this
|
||
opens up all sorts of interesting optimizations, because we
|
||
now know every location that this address load is used. */
|
||
if (irel+1 < irelend
|
||
&& ELF64_R_TYPE (irel[1].r_info) == R_ALPHA_LITUSE)
|
||
{
|
||
if (!elf64_alpha_relax_with_lituse (&info, symval, irel))
|
||
goto error_return;
|
||
}
|
||
else
|
||
{
|
||
if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
|
||
goto error_return;
|
||
}
|
||
break;
|
||
|
||
case R_ALPHA_GOTDTPREL:
|
||
case R_ALPHA_GOTTPREL:
|
||
BFD_ASSERT(info.gotent != NULL);
|
||
if (!elf64_alpha_relax_got_load (&info, symval, irel, r_type))
|
||
goto error_return;
|
||
break;
|
||
|
||
case R_ALPHA_TLSGD:
|
||
case R_ALPHA_TLSLDM:
|
||
BFD_ASSERT(info.gotent != NULL);
|
||
if (!elf64_alpha_relax_tls_get_addr (&info, symval, irel,
|
||
r_type == R_ALPHA_TLSGD))
|
||
goto error_return;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (isymbuf != NULL
|
||
&& symtab_hdr->contents != (unsigned char *) isymbuf)
|
||
{
|
||
if (!link_info->keep_memory)
|
||
free (isymbuf);
|
||
else
|
||
{
|
||
/* Cache the symbols for elf_link_input_bfd. */
|
||
symtab_hdr->contents = (unsigned char *) isymbuf;
|
||
}
|
||
}
|
||
|
||
if (info.contents != NULL
|
||
&& elf_section_data (sec)->this_hdr.contents != info.contents)
|
||
{
|
||
if (!info.changed_contents && !link_info->keep_memory)
|
||
free (info.contents);
|
||
else
|
||
{
|
||
/* Cache the section contents for elf_link_input_bfd. */
|
||
elf_section_data (sec)->this_hdr.contents = info.contents;
|
||
}
|
||
}
|
||
|
||
if (elf_section_data (sec)->relocs != internal_relocs)
|
||
{
|
||
if (!info.changed_relocs)
|
||
free (internal_relocs);
|
||
else
|
||
elf_section_data (sec)->relocs = internal_relocs;
|
||
}
|
||
|
||
*again = info.changed_contents || info.changed_relocs;
|
||
|
||
return true;
|
||
|
||
error_return:
|
||
if (symtab_hdr->contents != (unsigned char *) isymbuf)
|
||
free (isymbuf);
|
||
if (elf_section_data (sec)->this_hdr.contents != info.contents)
|
||
free (info.contents);
|
||
if (elf_section_data (sec)->relocs != internal_relocs)
|
||
free (internal_relocs);
|
||
return false;
|
||
}
|
||
|
||
/* Emit a dynamic relocation for (DYNINDX, RTYPE, ADDEND) at (SEC, OFFSET)
|
||
into the next available slot in SREL. */
|
||
|
||
static void
|
||
elf64_alpha_emit_dynrel (bfd *abfd, struct bfd_link_info *info,
|
||
asection *sec, asection *srel, bfd_vma offset,
|
||
long dynindx, long rtype, bfd_vma addend)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
BFD_ASSERT (srel != NULL);
|
||
|
||
outrel.r_info = ELF64_R_INFO (dynindx, rtype);
|
||
outrel.r_addend = addend;
|
||
|
||
offset = _bfd_elf_section_offset (abfd, info, sec, offset);
|
||
if ((offset | 1) != (bfd_vma) -1)
|
||
outrel.r_offset = sec->output_section->vma + sec->output_offset + offset;
|
||
else
|
||
memset (&outrel, 0, sizeof (outrel));
|
||
|
||
loc = srel->contents;
|
||
loc += srel->reloc_count++ * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (abfd, &outrel, loc);
|
||
BFD_ASSERT (sizeof (Elf64_External_Rela) * srel->reloc_count <= srel->size);
|
||
}
|
||
|
||
/* Relocate an Alpha ELF section for a relocatable link.
|
||
|
||
We don't have to change anything unless the reloc is against a section
|
||
symbol, in which case we have to adjust according to where the section
|
||
symbol winds up in the output section. */
|
||
|
||
static int
|
||
elf64_alpha_relocate_section_r (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
bfd *input_bfd, asection *input_section,
|
||
bfd_byte *contents ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Rela *relocs,
|
||
Elf_Internal_Sym *local_syms,
|
||
asection **local_sections)
|
||
{
|
||
unsigned long symtab_hdr_sh_info;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bool ret_val = true;
|
||
|
||
symtab_hdr_sh_info = elf_symtab_hdr (input_bfd).sh_info;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
|
||
relend = relocs + input_section->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
unsigned long r_type;
|
||
|
||
r_type = ELF64_R_TYPE (rel->r_info);
|
||
if (r_type >= R_ALPHA_max)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: unsupported relocation type %#x"),
|
||
input_bfd, (int) r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret_val = false;
|
||
continue;
|
||
}
|
||
|
||
/* The symbol associated with GPDISP and LITUSE is
|
||
immaterial. Only the addend is significant. */
|
||
if (r_type == R_ALPHA_GPDISP || r_type == R_ALPHA_LITUSE)
|
||
continue;
|
||
|
||
r_symndx = ELF64_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr_sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
}
|
||
else
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
|
||
h = sym_hashes[r_symndx - symtab_hdr_sh_info];
|
||
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->root.type != bfd_link_hash_defweak)
|
||
continue;
|
||
|
||
sym = NULL;
|
||
sec = h->root.u.def.section;
|
||
}
|
||
|
||
if (sec != NULL && discarded_section (sec))
|
||
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
||
rel, 1, relend,
|
||
elf64_alpha_howto_table + r_type, 0,
|
||
contents);
|
||
|
||
if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
rel->r_addend += sec->output_offset;
|
||
}
|
||
|
||
return ret_val;
|
||
}
|
||
|
||
/* Relocate an Alpha ELF section. */
|
||
|
||
static int
|
||
elf64_alpha_relocate_section (bfd *output_bfd, struct bfd_link_info *info,
|
||
bfd *input_bfd, asection *input_section,
|
||
bfd_byte *contents, Elf_Internal_Rela *relocs,
|
||
Elf_Internal_Sym *local_syms,
|
||
asection **local_sections)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
asection *sgot, *srel, *srelgot;
|
||
bfd *dynobj, *gotobj;
|
||
bfd_vma gp, tp_base, dtp_base;
|
||
struct alpha_elf_got_entry **local_got_entries;
|
||
bool ret_val;
|
||
|
||
BFD_ASSERT (is_alpha_elf (input_bfd));
|
||
|
||
/* Handle relocatable links with a smaller loop. */
|
||
if (bfd_link_relocatable (info))
|
||
return elf64_alpha_relocate_section_r (output_bfd, info, input_bfd,
|
||
input_section, contents, relocs,
|
||
local_syms, local_sections);
|
||
|
||
/* This is a final link. */
|
||
|
||
ret_val = true;
|
||
|
||
symtab_hdr = &elf_symtab_hdr (input_bfd);
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
srelgot = elf_hash_table (info)->srelgot;
|
||
|
||
if (input_section->flags & SEC_ALLOC)
|
||
{
|
||
const char *section_name;
|
||
section_name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, elf_elfheader(input_bfd)->e_shstrndx,
|
||
_bfd_elf_single_rel_hdr (input_section)->sh_name));
|
||
BFD_ASSERT(section_name != NULL);
|
||
srel = bfd_get_linker_section (dynobj, section_name);
|
||
}
|
||
else
|
||
srel = NULL;
|
||
|
||
/* Find the gp value for this input bfd. */
|
||
gotobj = alpha_elf_tdata (input_bfd)->gotobj;
|
||
if (gotobj)
|
||
{
|
||
sgot = alpha_elf_tdata (gotobj)->got;
|
||
gp = _bfd_get_gp_value (gotobj);
|
||
if (gp == 0)
|
||
{
|
||
gp = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ 0x8000);
|
||
_bfd_set_gp_value (gotobj, gp);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
sgot = NULL;
|
||
gp = 0;
|
||
}
|
||
|
||
local_got_entries = alpha_elf_tdata(input_bfd)->local_got_entries;
|
||
|
||
if (elf_hash_table (info)->tls_sec != NULL)
|
||
{
|
||
dtp_base = alpha_get_dtprel_base (info);
|
||
tp_base = alpha_get_tprel_base (info);
|
||
}
|
||
else
|
||
dtp_base = tp_base = 0;
|
||
|
||
relend = relocs + input_section->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
{
|
||
struct alpha_elf_link_hash_entry *h = NULL;
|
||
struct alpha_elf_got_entry *gotent;
|
||
bfd_reloc_status_type r;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym = NULL;
|
||
asection *sec = NULL;
|
||
bfd_vma value;
|
||
bfd_vma addend;
|
||
bool dynamic_symbol_p;
|
||
bool unresolved_reloc = false;
|
||
bool undef_weak_ref = false;
|
||
unsigned long r_type;
|
||
|
||
r_type = ELF64_R_TYPE(rel->r_info);
|
||
if (r_type >= R_ALPHA_max)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: unsupported relocation type %#x"),
|
||
input_bfd, (int) r_type);
|
||
bfd_set_error (bfd_error_bad_value);
|
||
ret_val = false;
|
||
continue;
|
||
}
|
||
|
||
howto = elf64_alpha_howto_table + r_type;
|
||
r_symndx = ELF64_R_SYM(rel->r_info);
|
||
|
||
/* The symbol for a TLSLDM reloc is ignored. Collapse the
|
||
reloc to the STN_UNDEF (0) symbol so that they all match. */
|
||
if (r_type == R_ALPHA_TLSLDM)
|
||
r_symndx = STN_UNDEF;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
asection *msec;
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
msec = sec;
|
||
value = _bfd_elf_rela_local_sym (output_bfd, sym, &msec, rel);
|
||
|
||
/* If this is a tp-relative relocation against sym STN_UNDEF (0),
|
||
this is hackery from relax_section. Force the value to
|
||
be the tls module base. */
|
||
if (r_symndx == STN_UNDEF
|
||
&& (r_type == R_ALPHA_TLSLDM
|
||
|| r_type == R_ALPHA_GOTTPREL
|
||
|| r_type == R_ALPHA_TPREL64
|
||
|| r_type == R_ALPHA_TPRELHI
|
||
|| r_type == R_ALPHA_TPRELLO
|
||
|| r_type == R_ALPHA_TPREL16))
|
||
value = dtp_base;
|
||
|
||
if (local_got_entries)
|
||
gotent = local_got_entries[r_symndx];
|
||
else
|
||
gotent = NULL;
|
||
|
||
/* Need to adjust local GOT entries' addends for SEC_MERGE
|
||
unless it has been done already. */
|
||
if ((sec->flags & SEC_MERGE)
|
||
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION
|
||
&& sec->sec_info_type == SEC_INFO_TYPE_MERGE
|
||
&& gotent
|
||
&& !gotent->reloc_xlated)
|
||
{
|
||
struct alpha_elf_got_entry *ent;
|
||
|
||
for (ent = gotent; ent; ent = ent->next)
|
||
{
|
||
ent->reloc_xlated = 1;
|
||
if (ent->use_count == 0)
|
||
continue;
|
||
msec = sec;
|
||
ent->addend =
|
||
_bfd_merged_section_offset (output_bfd, &msec,
|
||
elf_section_data (sec)->
|
||
sec_info,
|
||
sym->st_value + ent->addend);
|
||
ent->addend -= sym->st_value;
|
||
ent->addend += msec->output_section->vma
|
||
+ msec->output_offset
|
||
- sec->output_section->vma
|
||
- sec->output_offset;
|
||
}
|
||
}
|
||
|
||
dynamic_symbol_p = false;
|
||
}
|
||
else
|
||
{
|
||
bool warned, ignored;
|
||
struct elf_link_hash_entry *hh;
|
||
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
||
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
hh, sec, value,
|
||
unresolved_reloc, warned, ignored);
|
||
|
||
if (warned)
|
||
continue;
|
||
|
||
if (value == 0
|
||
&& ! unresolved_reloc
|
||
&& hh->root.type == bfd_link_hash_undefweak)
|
||
undef_weak_ref = true;
|
||
|
||
h = (struct alpha_elf_link_hash_entry *) hh;
|
||
dynamic_symbol_p = alpha_elf_dynamic_symbol_p (&h->root, info);
|
||
gotent = h->got_entries;
|
||
}
|
||
|
||
if (sec != NULL && discarded_section (sec))
|
||
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
||
rel, 1, relend, howto, 0, contents);
|
||
|
||
addend = rel->r_addend;
|
||
value += addend;
|
||
|
||
/* Search for the proper got entry. */
|
||
for (; gotent ; gotent = gotent->next)
|
||
if (gotent->gotobj == gotobj
|
||
&& gotent->reloc_type == r_type
|
||
&& gotent->addend == addend)
|
||
break;
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_ALPHA_GPDISP:
|
||
{
|
||
bfd_byte *p_ldah, *p_lda;
|
||
|
||
BFD_ASSERT(gp != 0);
|
||
|
||
value = (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ rel->r_offset);
|
||
|
||
p_ldah = contents + rel->r_offset;
|
||
p_lda = p_ldah + rel->r_addend;
|
||
|
||
r = elf64_alpha_do_reloc_gpdisp (input_bfd, gp - value,
|
||
p_ldah, p_lda);
|
||
}
|
||
break;
|
||
|
||
case R_ALPHA_LITERAL:
|
||
BFD_ASSERT(sgot != NULL);
|
||
BFD_ASSERT(gp != 0);
|
||
BFD_ASSERT(gotent != NULL);
|
||
BFD_ASSERT(gotent->use_count >= 1);
|
||
|
||
if (!gotent->reloc_done)
|
||
{
|
||
gotent->reloc_done = 1;
|
||
|
||
bfd_put_64 (output_bfd, value,
|
||
sgot->contents + gotent->got_offset);
|
||
|
||
/* If the symbol has been forced local, output a
|
||
RELATIVE reloc, otherwise it will be handled in
|
||
finish_dynamic_symbol. */
|
||
if (bfd_link_pic (info)
|
||
&& !dynamic_symbol_p
|
||
&& !undef_weak_ref)
|
||
elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
|
||
gotent->got_offset, 0,
|
||
R_ALPHA_RELATIVE, value);
|
||
}
|
||
|
||
value = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ gotent->got_offset);
|
||
value -= gp;
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_GPREL32:
|
||
case R_ALPHA_GPREL16:
|
||
case R_ALPHA_GPRELLOW:
|
||
if (dynamic_symbol_p)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: gp-relative relocation against dynamic symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
BFD_ASSERT(gp != 0);
|
||
value -= gp;
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_GPRELHIGH:
|
||
if (dynamic_symbol_p)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: gp-relative relocation against dynamic symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
BFD_ASSERT(gp != 0);
|
||
value -= gp;
|
||
value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_HINT:
|
||
/* A call to a dynamic symbol is definitely out of range of
|
||
the 16-bit displacement. Don't bother writing anything. */
|
||
if (dynamic_symbol_p)
|
||
{
|
||
r = bfd_reloc_ok;
|
||
break;
|
||
}
|
||
/* The regular PC-relative stuff measures from the start of
|
||
the instruction rather than the end. */
|
||
value -= 4;
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_BRADDR:
|
||
if (dynamic_symbol_p)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: pc-relative relocation against dynamic symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
/* The regular PC-relative stuff measures from the start of
|
||
the instruction rather than the end. */
|
||
value -= 4;
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_BRSGP:
|
||
{
|
||
int other;
|
||
const char *name;
|
||
|
||
/* The regular PC-relative stuff measures from the start of
|
||
the instruction rather than the end. */
|
||
value -= 4;
|
||
|
||
/* The source and destination gp must be the same. Note that
|
||
the source will always have an assigned gp, since we forced
|
||
one in check_relocs, but that the destination may not, as
|
||
it might not have had any relocations at all. Also take
|
||
care not to crash if H is an undefined symbol. */
|
||
if (h != NULL && sec != NULL
|
||
&& alpha_elf_tdata (sec->owner)->gotobj
|
||
&& gotobj != alpha_elf_tdata (sec->owner)->gotobj)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: change in gp: BRSGP %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
|
||
/* The symbol should be marked either NOPV or STD_GPLOAD. */
|
||
if (h != NULL)
|
||
other = h->root.other;
|
||
else
|
||
other = sym->st_other;
|
||
switch (other & STO_ALPHA_STD_GPLOAD)
|
||
{
|
||
case STO_ALPHA_NOPV:
|
||
break;
|
||
case STO_ALPHA_STD_GPLOAD:
|
||
value += 8;
|
||
break;
|
||
default:
|
||
if (h != NULL)
|
||
name = h->root.root.root.string;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL)
|
||
name = _("<unknown>");
|
||
else if (name[0] == 0)
|
||
name = bfd_section_name (sec);
|
||
}
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: !samegp reloc against symbol without .prologue: %s"),
|
||
input_bfd, name);
|
||
ret_val = false;
|
||
break;
|
||
}
|
||
|
||
goto default_reloc;
|
||
}
|
||
|
||
case R_ALPHA_REFLONG:
|
||
case R_ALPHA_REFQUAD:
|
||
case R_ALPHA_DTPREL64:
|
||
case R_ALPHA_TPREL64:
|
||
{
|
||
long dynindx, dyntype = r_type;
|
||
bfd_vma dynaddend;
|
||
|
||
/* Careful here to remember RELATIVE relocations for global
|
||
variables for symbolic shared objects. */
|
||
|
||
if (dynamic_symbol_p)
|
||
{
|
||
BFD_ASSERT(h->root.dynindx != -1);
|
||
dynindx = h->root.dynindx;
|
||
dynaddend = addend;
|
||
addend = 0, value = 0;
|
||
}
|
||
else if (r_type == R_ALPHA_DTPREL64)
|
||
{
|
||
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
||
value -= dtp_base;
|
||
goto default_reloc;
|
||
}
|
||
else if (r_type == R_ALPHA_TPREL64)
|
||
{
|
||
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
||
if (!bfd_link_dll (info))
|
||
{
|
||
value -= tp_base;
|
||
goto default_reloc;
|
||
}
|
||
dynindx = 0;
|
||
dynaddend = value - dtp_base;
|
||
}
|
||
else if (bfd_link_pic (info)
|
||
&& r_symndx != STN_UNDEF
|
||
&& (input_section->flags & SEC_ALLOC)
|
||
&& !undef_weak_ref
|
||
&& !(unresolved_reloc
|
||
&& (_bfd_elf_section_offset (output_bfd, info,
|
||
input_section,
|
||
rel->r_offset)
|
||
== (bfd_vma) -1)))
|
||
{
|
||
if (r_type == R_ALPHA_REFLONG)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: unhandled dynamic relocation against %s"),
|
||
input_bfd,
|
||
h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
dynindx = 0;
|
||
dyntype = R_ALPHA_RELATIVE;
|
||
dynaddend = value;
|
||
}
|
||
else
|
||
goto default_reloc;
|
||
|
||
if (input_section->flags & SEC_ALLOC)
|
||
elf64_alpha_emit_dynrel (output_bfd, info, input_section,
|
||
srel, rel->r_offset, dynindx,
|
||
dyntype, dynaddend);
|
||
}
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_SREL16:
|
||
case R_ALPHA_SREL32:
|
||
case R_ALPHA_SREL64:
|
||
if (dynamic_symbol_p)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: pc-relative relocation against dynamic symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
else if (bfd_link_pic (info)
|
||
&& undef_weak_ref)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: pc-relative relocation against undefined weak symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
|
||
|
||
/* ??? .eh_frame references to discarded sections will be smashed
|
||
to relocations against SHN_UNDEF. The .eh_frame format allows
|
||
NULL to be encoded as 0 in any format, so this works here. */
|
||
if (r_symndx == STN_UNDEF
|
||
|| (unresolved_reloc
|
||
&& _bfd_elf_section_offset (output_bfd, info,
|
||
input_section,
|
||
rel->r_offset) == (bfd_vma) -1))
|
||
howto = (elf64_alpha_howto_table
|
||
+ (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_TLSLDM:
|
||
/* Ignore the symbol for the relocation. The result is always
|
||
the current module. */
|
||
dynamic_symbol_p = 0;
|
||
/* FALLTHRU */
|
||
|
||
case R_ALPHA_TLSGD:
|
||
if (!gotent->reloc_done)
|
||
{
|
||
gotent->reloc_done = 1;
|
||
|
||
/* Note that the module index for the main program is 1. */
|
||
bfd_put_64 (output_bfd,
|
||
!bfd_link_pic (info) && !dynamic_symbol_p,
|
||
sgot->contents + gotent->got_offset);
|
||
|
||
/* If the symbol has been forced local, output a
|
||
DTPMOD64 reloc, otherwise it will be handled in
|
||
finish_dynamic_symbol. */
|
||
if (bfd_link_pic (info) && !dynamic_symbol_p)
|
||
elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
|
||
gotent->got_offset, 0,
|
||
R_ALPHA_DTPMOD64, 0);
|
||
|
||
if (dynamic_symbol_p || r_type == R_ALPHA_TLSLDM)
|
||
value = 0;
|
||
else
|
||
{
|
||
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
||
value -= dtp_base;
|
||
}
|
||
bfd_put_64 (output_bfd, value,
|
||
sgot->contents + gotent->got_offset + 8);
|
||
}
|
||
|
||
value = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ gotent->got_offset);
|
||
value -= gp;
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_DTPRELHI:
|
||
case R_ALPHA_DTPRELLO:
|
||
case R_ALPHA_DTPREL16:
|
||
if (dynamic_symbol_p)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: dtp-relative relocation against dynamic symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
||
value -= dtp_base;
|
||
if (r_type == R_ALPHA_DTPRELHI)
|
||
value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_TPRELHI:
|
||
case R_ALPHA_TPRELLO:
|
||
case R_ALPHA_TPREL16:
|
||
if (bfd_link_dll (info))
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: TLS local exec code cannot be linked into shared objects"),
|
||
input_bfd);
|
||
ret_val = false;
|
||
}
|
||
else if (dynamic_symbol_p)
|
||
{
|
||
_bfd_error_handler
|
||
/* xgettext:c-format */
|
||
(_("%pB: tp-relative relocation against dynamic symbol %s"),
|
||
input_bfd, h->root.root.root.string);
|
||
ret_val = false;
|
||
}
|
||
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
||
value -= tp_base;
|
||
if (r_type == R_ALPHA_TPRELHI)
|
||
value = ((bfd_signed_vma) value >> 16) + ((value >> 15) & 1);
|
||
goto default_reloc;
|
||
|
||
case R_ALPHA_GOTDTPREL:
|
||
case R_ALPHA_GOTTPREL:
|
||
BFD_ASSERT(sgot != NULL);
|
||
BFD_ASSERT(gp != 0);
|
||
BFD_ASSERT(gotent != NULL);
|
||
BFD_ASSERT(gotent->use_count >= 1);
|
||
|
||
if (!gotent->reloc_done)
|
||
{
|
||
gotent->reloc_done = 1;
|
||
|
||
if (dynamic_symbol_p)
|
||
value = 0;
|
||
else
|
||
{
|
||
BFD_ASSERT (elf_hash_table (info)->tls_sec != NULL);
|
||
if (r_type == R_ALPHA_GOTDTPREL)
|
||
value -= dtp_base;
|
||
else if (bfd_link_executable (info))
|
||
value -= tp_base;
|
||
else
|
||
{
|
||
elf64_alpha_emit_dynrel (output_bfd, info, sgot, srelgot,
|
||
gotent->got_offset, 0,
|
||
R_ALPHA_TPREL64,
|
||
value - dtp_base);
|
||
value = 0;
|
||
}
|
||
}
|
||
bfd_put_64 (output_bfd, value,
|
||
sgot->contents + gotent->got_offset);
|
||
}
|
||
|
||
value = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ gotent->got_offset);
|
||
value -= gp;
|
||
goto default_reloc;
|
||
|
||
default:
|
||
default_reloc:
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset, value, 0);
|
||
break;
|
||
}
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_ok:
|
||
break;
|
||
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
/* Don't warn if the overflow is due to pc relative reloc
|
||
against discarded section. Section optimization code should
|
||
handle it. */
|
||
|
||
if (r_symndx < symtab_hdr->sh_info
|
||
&& sec != NULL && howto->pc_relative
|
||
&& discarded_section (sec))
|
||
break;
|
||
|
||
if (h != NULL)
|
||
name = NULL;
|
||
else
|
||
{
|
||
name = (bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
||
if (name == NULL)
|
||
return false;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (sec);
|
||
}
|
||
(*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root.root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
return ret_val;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bool
|
||
elf64_alpha_finish_dynamic_symbol (bfd *output_bfd, struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym *sym)
|
||
{
|
||
struct alpha_elf_link_hash_entry *ah = (struct alpha_elf_link_hash_entry *)h;
|
||
|
||
if (h->needs_plt)
|
||
{
|
||
/* Fill in the .plt entry for this symbol. */
|
||
asection *splt, *sgot, *srel;
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
bfd_vma got_addr, plt_addr;
|
||
bfd_vma plt_index;
|
||
struct alpha_elf_got_entry *gotent;
|
||
|
||
BFD_ASSERT (h->dynindx != -1);
|
||
|
||
splt = elf_hash_table (info)->splt;
|
||
BFD_ASSERT (splt != NULL);
|
||
srel = elf_hash_table (info)->srelplt;
|
||
BFD_ASSERT (srel != NULL);
|
||
|
||
for (gotent = ah->got_entries; gotent ; gotent = gotent->next)
|
||
if (gotent->reloc_type == R_ALPHA_LITERAL
|
||
&& gotent->use_count > 0)
|
||
{
|
||
unsigned int insn;
|
||
int disp;
|
||
|
||
sgot = alpha_elf_tdata (gotent->gotobj)->got;
|
||
BFD_ASSERT (sgot != NULL);
|
||
|
||
BFD_ASSERT (gotent->got_offset != -1);
|
||
BFD_ASSERT (gotent->plt_offset != -1);
|
||
|
||
got_addr = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ gotent->got_offset);
|
||
plt_addr = (splt->output_section->vma
|
||
+ splt->output_offset
|
||
+ gotent->plt_offset);
|
||
|
||
plt_index = (gotent->plt_offset-PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
|
||
|
||
/* Fill in the entry in the procedure linkage table. */
|
||
if (elf64_alpha_use_secureplt)
|
||
{
|
||
disp = (PLT_HEADER_SIZE - 4) - (gotent->plt_offset + 4);
|
||
insn = INSN_AD (INSN_BR, 31, disp);
|
||
bfd_put_32 (output_bfd, insn,
|
||
splt->contents + gotent->plt_offset);
|
||
|
||
plt_index = ((gotent->plt_offset - NEW_PLT_HEADER_SIZE)
|
||
/ NEW_PLT_ENTRY_SIZE);
|
||
}
|
||
else
|
||
{
|
||
disp = -(gotent->plt_offset + 4);
|
||
insn = INSN_AD (INSN_BR, 28, disp);
|
||
bfd_put_32 (output_bfd, insn,
|
||
splt->contents + gotent->plt_offset);
|
||
bfd_put_32 (output_bfd, INSN_UNOP,
|
||
splt->contents + gotent->plt_offset + 4);
|
||
bfd_put_32 (output_bfd, INSN_UNOP,
|
||
splt->contents + gotent->plt_offset + 8);
|
||
|
||
plt_index = ((gotent->plt_offset - OLD_PLT_HEADER_SIZE)
|
||
/ OLD_PLT_ENTRY_SIZE);
|
||
}
|
||
|
||
/* Fill in the entry in the .rela.plt section. */
|
||
outrel.r_offset = got_addr;
|
||
outrel.r_info = ELF64_R_INFO(h->dynindx, R_ALPHA_JMP_SLOT);
|
||
outrel.r_addend = 0;
|
||
|
||
loc = srel->contents + plt_index * sizeof (Elf64_External_Rela);
|
||
bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
|
||
|
||
/* Fill in the entry in the .got. */
|
||
bfd_put_64 (output_bfd, plt_addr,
|
||
sgot->contents + gotent->got_offset);
|
||
}
|
||
}
|
||
else if (alpha_elf_dynamic_symbol_p (h, info))
|
||
{
|
||
/* Fill in the dynamic relocations for this symbol's .got entries. */
|
||
asection *srel;
|
||
struct alpha_elf_got_entry *gotent;
|
||
|
||
srel = elf_hash_table (info)->srelgot;
|
||
BFD_ASSERT (srel != NULL);
|
||
|
||
for (gotent = ((struct alpha_elf_link_hash_entry *) h)->got_entries;
|
||
gotent != NULL;
|
||
gotent = gotent->next)
|
||
{
|
||
asection *sgot;
|
||
long r_type;
|
||
|
||
if (gotent->use_count == 0)
|
||
continue;
|
||
|
||
sgot = alpha_elf_tdata (gotent->gotobj)->got;
|
||
|
||
r_type = gotent->reloc_type;
|
||
switch (r_type)
|
||
{
|
||
case R_ALPHA_LITERAL:
|
||
r_type = R_ALPHA_GLOB_DAT;
|
||
break;
|
||
case R_ALPHA_TLSGD:
|
||
r_type = R_ALPHA_DTPMOD64;
|
||
break;
|
||
case R_ALPHA_GOTDTPREL:
|
||
r_type = R_ALPHA_DTPREL64;
|
||
break;
|
||
case R_ALPHA_GOTTPREL:
|
||
r_type = R_ALPHA_TPREL64;
|
||
break;
|
||
case R_ALPHA_TLSLDM:
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
|
||
gotent->got_offset, h->dynindx,
|
||
r_type, gotent->addend);
|
||
|
||
if (gotent->reloc_type == R_ALPHA_TLSGD)
|
||
elf64_alpha_emit_dynrel (output_bfd, info, sgot, srel,
|
||
gotent->got_offset + 8, h->dynindx,
|
||
R_ALPHA_DTPREL64, gotent->addend);
|
||
}
|
||
}
|
||
|
||
/* Mark some specially defined symbols as absolute. */
|
||
if (h == elf_hash_table (info)->hdynamic
|
||
|| h == elf_hash_table (info)->hgot
|
||
|| h == elf_hash_table (info)->hplt)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static bool
|
||
elf64_alpha_finish_dynamic_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
sdyn = bfd_get_linker_section (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
asection *splt, *sgotplt, *srelaplt;
|
||
Elf64_External_Dyn *dyncon, *dynconend;
|
||
bfd_vma plt_vma, gotplt_vma;
|
||
|
||
splt = elf_hash_table (info)->splt;
|
||
srelaplt = elf_hash_table (info)->srelplt;
|
||
BFD_ASSERT (splt != NULL && sdyn != NULL);
|
||
|
||
plt_vma = splt->output_section->vma + splt->output_offset;
|
||
|
||
gotplt_vma = 0;
|
||
if (elf64_alpha_use_secureplt)
|
||
{
|
||
sgotplt = elf_hash_table (info)->sgotplt;
|
||
BFD_ASSERT (sgotplt != NULL);
|
||
if (sgotplt->size > 0)
|
||
gotplt_vma = sgotplt->output_section->vma + sgotplt->output_offset;
|
||
}
|
||
|
||
dyncon = (Elf64_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
|
||
bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
case DT_PLTGOT:
|
||
dyn.d_un.d_ptr
|
||
= elf64_alpha_use_secureplt ? gotplt_vma : plt_vma;
|
||
break;
|
||
case DT_PLTRELSZ:
|
||
dyn.d_un.d_val = srelaplt ? srelaplt->size : 0;
|
||
break;
|
||
case DT_JMPREL:
|
||
dyn.d_un.d_ptr = srelaplt ? (srelaplt->output_section->vma
|
||
+ srelaplt->output_offset) : 0;
|
||
break;
|
||
}
|
||
|
||
bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
}
|
||
|
||
/* Initialize the plt header. */
|
||
if (splt->size > 0)
|
||
{
|
||
unsigned int insn;
|
||
int ofs;
|
||
|
||
if (elf64_alpha_use_secureplt)
|
||
{
|
||
ofs = gotplt_vma - (plt_vma + PLT_HEADER_SIZE);
|
||
|
||
insn = INSN_ABC (INSN_SUBQ, 27, 28, 25);
|
||
bfd_put_32 (output_bfd, insn, splt->contents);
|
||
|
||
insn = INSN_ABO (INSN_LDAH, 28, 28, (ofs + 0x8000) >> 16);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 4);
|
||
|
||
insn = INSN_ABC (INSN_S4SUBQ, 25, 25, 25);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 8);
|
||
|
||
insn = INSN_ABO (INSN_LDA, 28, 28, ofs);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 12);
|
||
|
||
insn = INSN_ABO (INSN_LDQ, 27, 28, 0);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 16);
|
||
|
||
insn = INSN_ABC (INSN_ADDQ, 25, 25, 25);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 20);
|
||
|
||
insn = INSN_ABO (INSN_LDQ, 28, 28, 8);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 24);
|
||
|
||
insn = INSN_AB (INSN_JMP, 31, 27);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 28);
|
||
|
||
insn = INSN_AD (INSN_BR, 28, -PLT_HEADER_SIZE);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 32);
|
||
}
|
||
else
|
||
{
|
||
insn = INSN_AD (INSN_BR, 27, 0); /* br $27, .+4 */
|
||
bfd_put_32 (output_bfd, insn, splt->contents);
|
||
|
||
insn = INSN_ABO (INSN_LDQ, 27, 27, 12);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 4);
|
||
|
||
insn = INSN_UNOP;
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 8);
|
||
|
||
insn = INSN_AB (INSN_JMP, 27, 27);
|
||
bfd_put_32 (output_bfd, insn, splt->contents + 12);
|
||
|
||
/* The next two words will be filled in by ld.so. */
|
||
bfd_put_64 (output_bfd, 0, splt->contents + 16);
|
||
bfd_put_64 (output_bfd, 0, splt->contents + 24);
|
||
}
|
||
|
||
elf_section_data (splt->output_section)->this_hdr.sh_entsize = 0;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* We need to use a special link routine to handle the .mdebug section.
|
||
We need to merge all instances of these sections together, not write
|
||
them all out sequentially. */
|
||
|
||
static bool
|
||
elf64_alpha_final_link (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
asection *o;
|
||
struct bfd_link_order *p;
|
||
asection *mdebug_sec;
|
||
struct ecoff_debug_info debug;
|
||
const struct ecoff_debug_swap *swap
|
||
= get_elf_backend_data (abfd)->elf_backend_ecoff_debug_swap;
|
||
HDRR *symhdr = &debug.symbolic_header;
|
||
void * mdebug_handle = NULL;
|
||
struct alpha_elf_link_hash_table * htab;
|
||
|
||
htab = alpha_elf_hash_table (info);
|
||
if (htab == NULL)
|
||
return false;
|
||
|
||
/* Go through the sections and collect the mdebug information. */
|
||
mdebug_sec = NULL;
|
||
for (o = abfd->sections; o != (asection *) NULL; o = o->next)
|
||
{
|
||
if (strcmp (o->name, ".mdebug") == 0)
|
||
{
|
||
struct extsym_info einfo;
|
||
|
||
/* We have found the .mdebug section in the output file.
|
||
Look through all the link_orders comprising it and merge
|
||
the information together. */
|
||
symhdr->magic = swap->sym_magic;
|
||
/* FIXME: What should the version stamp be? */
|
||
symhdr->vstamp = 0;
|
||
symhdr->ilineMax = 0;
|
||
symhdr->cbLine = 0;
|
||
symhdr->idnMax = 0;
|
||
symhdr->ipdMax = 0;
|
||
symhdr->isymMax = 0;
|
||
symhdr->ioptMax = 0;
|
||
symhdr->iauxMax = 0;
|
||
symhdr->issMax = 0;
|
||
symhdr->issExtMax = 0;
|
||
symhdr->ifdMax = 0;
|
||
symhdr->crfd = 0;
|
||
symhdr->iextMax = 0;
|
||
|
||
/* We accumulate the debugging information itself in the
|
||
debug_info structure. */
|
||
debug.line = NULL;
|
||
debug.external_dnr = NULL;
|
||
debug.external_pdr = NULL;
|
||
debug.external_sym = NULL;
|
||
debug.external_opt = NULL;
|
||
debug.external_aux = NULL;
|
||
debug.ss = NULL;
|
||
debug.ssext = debug.ssext_end = NULL;
|
||
debug.external_fdr = NULL;
|
||
debug.external_rfd = NULL;
|
||
debug.external_ext = debug.external_ext_end = NULL;
|
||
|
||
mdebug_handle = bfd_ecoff_debug_init (abfd, &debug, swap, info);
|
||
if (mdebug_handle == NULL)
|
||
return false;
|
||
|
||
if (1)
|
||
{
|
||
asection *s;
|
||
EXTR esym;
|
||
bfd_vma last = 0;
|
||
unsigned int i;
|
||
static const char * const name[] =
|
||
{
|
||
".text", ".init", ".fini", ".data",
|
||
".rodata", ".sdata", ".sbss", ".bss"
|
||
};
|
||
static const int sc[] = { scText, scInit, scFini, scData,
|
||
scRData, scSData, scSBss, scBss };
|
||
|
||
esym.jmptbl = 0;
|
||
esym.cobol_main = 0;
|
||
esym.weakext = 0;
|
||
esym.reserved = 0;
|
||
esym.ifd = ifdNil;
|
||
esym.asym.iss = issNil;
|
||
esym.asym.st = stLocal;
|
||
esym.asym.reserved = 0;
|
||
esym.asym.index = indexNil;
|
||
for (i = 0; i < 8; i++)
|
||
{
|
||
esym.asym.sc = sc[i];
|
||
s = bfd_get_section_by_name (abfd, name[i]);
|
||
if (s != NULL)
|
||
{
|
||
esym.asym.value = s->vma;
|
||
last = s->vma + s->size;
|
||
}
|
||
else
|
||
esym.asym.value = last;
|
||
|
||
if (! bfd_ecoff_debug_one_external (abfd, &debug, swap,
|
||
name[i], &esym))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
for (p = o->map_head.link_order;
|
||
p != (struct bfd_link_order *) NULL;
|
||
p = p->next)
|
||
{
|
||
asection *input_section;
|
||
bfd *input_bfd;
|
||
const struct ecoff_debug_swap *input_swap;
|
||
struct ecoff_debug_info input_debug;
|
||
char *eraw_src;
|
||
char *eraw_end;
|
||
|
||
if (p->type != bfd_indirect_link_order)
|
||
{
|
||
if (p->type == bfd_data_link_order)
|
||
continue;
|
||
abort ();
|
||
}
|
||
|
||
input_section = p->u.indirect.section;
|
||
input_bfd = input_section->owner;
|
||
|
||
if (! is_alpha_elf (input_bfd))
|
||
/* I don't know what a non ALPHA ELF bfd would be
|
||
doing with a .mdebug section, but I don't really
|
||
want to deal with it. */
|
||
continue;
|
||
|
||
input_swap = (get_elf_backend_data (input_bfd)
|
||
->elf_backend_ecoff_debug_swap);
|
||
|
||
BFD_ASSERT (p->size == input_section->size);
|
||
|
||
/* The ECOFF linking code expects that we have already
|
||
read in the debugging information and set up an
|
||
ecoff_debug_info structure, so we do that now. */
|
||
if (!elf64_alpha_read_ecoff_info (input_bfd, input_section,
|
||
&input_debug))
|
||
return false;
|
||
|
||
if (! (bfd_ecoff_debug_accumulate
|
||
(mdebug_handle, abfd, &debug, swap, input_bfd,
|
||
&input_debug, input_swap, info)))
|
||
return false;
|
||
|
||
/* Loop through the external symbols. For each one with
|
||
interesting information, try to find the symbol in
|
||
the linker global hash table and save the information
|
||
for the output external symbols. */
|
||
eraw_src = (char *) input_debug.external_ext;
|
||
eraw_end = (eraw_src
|
||
+ (input_debug.symbolic_header.iextMax
|
||
* input_swap->external_ext_size));
|
||
for (;
|
||
eraw_src < eraw_end;
|
||
eraw_src += input_swap->external_ext_size)
|
||
{
|
||
EXTR ext;
|
||
const char *name;
|
||
struct alpha_elf_link_hash_entry *h;
|
||
|
||
(*input_swap->swap_ext_in) (input_bfd, eraw_src, &ext);
|
||
if (ext.asym.sc == scNil
|
||
|| ext.asym.sc == scUndefined
|
||
|| ext.asym.sc == scSUndefined)
|
||
continue;
|
||
|
||
name = input_debug.ssext + ext.asym.iss;
|
||
h = alpha_elf_link_hash_lookup (htab, name, false, false, true);
|
||
if (h == NULL || h->esym.ifd != -2)
|
||
continue;
|
||
|
||
if (ext.ifd != -1)
|
||
{
|
||
BFD_ASSERT (ext.ifd
|
||
< input_debug.symbolic_header.ifdMax);
|
||
ext.ifd = input_debug.ifdmap[ext.ifd];
|
||
}
|
||
|
||
h->esym = ext;
|
||
}
|
||
|
||
/* Free up the information we just read. */
|
||
free (input_debug.line);
|
||
free (input_debug.external_dnr);
|
||
free (input_debug.external_pdr);
|
||
free (input_debug.external_sym);
|
||
free (input_debug.external_opt);
|
||
free (input_debug.external_aux);
|
||
free (input_debug.ss);
|
||
free (input_debug.ssext);
|
||
free (input_debug.external_fdr);
|
||
free (input_debug.external_rfd);
|
||
free (input_debug.external_ext);
|
||
|
||
/* Hack: reset the SEC_HAS_CONTENTS flag so that
|
||
elf_link_input_bfd ignores this section. */
|
||
input_section->flags &=~ SEC_HAS_CONTENTS;
|
||
}
|
||
|
||
/* Build the external symbol information. */
|
||
einfo.abfd = abfd;
|
||
einfo.info = info;
|
||
einfo.debug = &debug;
|
||
einfo.swap = swap;
|
||
einfo.failed = false;
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
elf64_alpha_output_extsym,
|
||
&einfo);
|
||
if (einfo.failed)
|
||
return false;
|
||
|
||
/* Set the size of the .mdebug section. */
|
||
o->size = bfd_ecoff_debug_size (abfd, &debug, swap);
|
||
|
||
/* Skip this section later on (I don't think this currently
|
||
matters, but someday it might). */
|
||
o->map_head.link_order = (struct bfd_link_order *) NULL;
|
||
|
||
mdebug_sec = o;
|
||
}
|
||
}
|
||
|
||
/* Invoke the regular ELF backend linker to do all the work. */
|
||
if (! bfd_elf_final_link (abfd, info))
|
||
return false;
|
||
|
||
/* Now write out the computed sections. */
|
||
|
||
/* The .got subsections... */
|
||
{
|
||
bfd *i, *dynobj = elf_hash_table(info)->dynobj;
|
||
for (i = htab->got_list;
|
||
i != NULL;
|
||
i = alpha_elf_tdata(i)->got_link_next)
|
||
{
|
||
asection *sgot;
|
||
|
||
/* elf_bfd_final_link already did everything in dynobj. */
|
||
if (i == dynobj)
|
||
continue;
|
||
|
||
sgot = alpha_elf_tdata(i)->got;
|
||
if (! bfd_set_section_contents (abfd, sgot->output_section,
|
||
sgot->contents,
|
||
(file_ptr) sgot->output_offset,
|
||
sgot->size))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if (mdebug_sec != (asection *) NULL)
|
||
{
|
||
BFD_ASSERT (abfd->output_has_begun);
|
||
if (! bfd_ecoff_write_accumulated_debug (mdebug_handle, abfd, &debug,
|
||
swap, info,
|
||
mdebug_sec->filepos))
|
||
return false;
|
||
|
||
bfd_ecoff_debug_free (mdebug_handle, abfd, &debug, swap, info);
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
static enum elf_reloc_type_class
|
||
elf64_alpha_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
const asection *rel_sec ATTRIBUTE_UNUSED,
|
||
const Elf_Internal_Rela *rela)
|
||
{
|
||
switch ((int) ELF64_R_TYPE (rela->r_info))
|
||
{
|
||
case R_ALPHA_RELATIVE:
|
||
return reloc_class_relative;
|
||
case R_ALPHA_JMP_SLOT:
|
||
return reloc_class_plt;
|
||
case R_ALPHA_COPY:
|
||
return reloc_class_copy;
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
static const struct bfd_elf_special_section elf64_alpha_special_sections[] =
|
||
{
|
||
{ STRING_COMMA_LEN (".sbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
|
||
{ STRING_COMMA_LEN (".sdata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_ALPHA_GPREL },
|
||
{ NULL, 0, 0, 0, 0 }
|
||
};
|
||
|
||
/* ECOFF swapping routines. These are used when dealing with the
|
||
.mdebug section, which is in the ECOFF debugging format. Copied
|
||
from elf32-mips.c. */
|
||
static const struct ecoff_debug_swap
|
||
elf64_alpha_ecoff_debug_swap =
|
||
{
|
||
/* Symbol table magic number. */
|
||
magicSym2,
|
||
/* Alignment of debugging information. E.g., 4. */
|
||
8,
|
||
/* Sizes of external symbolic information. */
|
||
sizeof (struct hdr_ext),
|
||
sizeof (struct dnr_ext),
|
||
sizeof (struct pdr_ext),
|
||
sizeof (struct sym_ext),
|
||
sizeof (struct opt_ext),
|
||
sizeof (struct fdr_ext),
|
||
sizeof (struct rfd_ext),
|
||
sizeof (struct ext_ext),
|
||
/* Functions to swap in external symbolic data. */
|
||
ecoff_swap_hdr_in,
|
||
ecoff_swap_dnr_in,
|
||
ecoff_swap_pdr_in,
|
||
ecoff_swap_sym_in,
|
||
ecoff_swap_opt_in,
|
||
ecoff_swap_fdr_in,
|
||
ecoff_swap_rfd_in,
|
||
ecoff_swap_ext_in,
|
||
_bfd_ecoff_swap_tir_in,
|
||
_bfd_ecoff_swap_rndx_in,
|
||
/* Functions to swap out external symbolic data. */
|
||
ecoff_swap_hdr_out,
|
||
ecoff_swap_dnr_out,
|
||
ecoff_swap_pdr_out,
|
||
ecoff_swap_sym_out,
|
||
ecoff_swap_opt_out,
|
||
ecoff_swap_fdr_out,
|
||
ecoff_swap_rfd_out,
|
||
ecoff_swap_ext_out,
|
||
_bfd_ecoff_swap_tir_out,
|
||
_bfd_ecoff_swap_rndx_out,
|
||
/* Function to read in symbolic data. */
|
||
elf64_alpha_read_ecoff_info
|
||
};
|
||
|
||
/* Use a non-standard hash bucket size of 8. */
|
||
|
||
static const struct elf_size_info alpha_elf_size_info =
|
||
{
|
||
sizeof (Elf64_External_Ehdr),
|
||
sizeof (Elf64_External_Phdr),
|
||
sizeof (Elf64_External_Shdr),
|
||
sizeof (Elf64_External_Rel),
|
||
sizeof (Elf64_External_Rela),
|
||
sizeof (Elf64_External_Sym),
|
||
sizeof (Elf64_External_Dyn),
|
||
sizeof (Elf_External_Note),
|
||
8,
|
||
1,
|
||
64, 3,
|
||
ELFCLASS64, EV_CURRENT,
|
||
bfd_elf64_write_out_phdrs,
|
||
bfd_elf64_write_shdrs_and_ehdr,
|
||
bfd_elf64_checksum_contents,
|
||
bfd_elf64_write_relocs,
|
||
bfd_elf64_swap_symbol_in,
|
||
bfd_elf64_swap_symbol_out,
|
||
bfd_elf64_slurp_reloc_table,
|
||
bfd_elf64_slurp_symbol_table,
|
||
bfd_elf64_swap_dyn_in,
|
||
bfd_elf64_swap_dyn_out,
|
||
bfd_elf64_swap_reloc_in,
|
||
bfd_elf64_swap_reloc_out,
|
||
bfd_elf64_swap_reloca_in,
|
||
bfd_elf64_swap_reloca_out
|
||
};
|
||
|
||
#define TARGET_LITTLE_SYM alpha_elf64_vec
|
||
#define TARGET_LITTLE_NAME "elf64-alpha"
|
||
#define ELF_ARCH bfd_arch_alpha
|
||
#define ELF_TARGET_ID ALPHA_ELF_DATA
|
||
#define ELF_MACHINE_CODE EM_ALPHA
|
||
#define ELF_MAXPAGESIZE 0x10000
|
||
#define ELF_COMMONPAGESIZE 0x2000
|
||
|
||
#define bfd_elf64_bfd_link_hash_table_create \
|
||
elf64_alpha_bfd_link_hash_table_create
|
||
|
||
#define bfd_elf64_bfd_reloc_type_lookup \
|
||
elf64_alpha_bfd_reloc_type_lookup
|
||
#define bfd_elf64_bfd_reloc_name_lookup \
|
||
elf64_alpha_bfd_reloc_name_lookup
|
||
#define elf_info_to_howto \
|
||
elf64_alpha_info_to_howto
|
||
|
||
#define bfd_elf64_mkobject \
|
||
elf64_alpha_mkobject
|
||
#define elf_backend_object_p \
|
||
elf64_alpha_object_p
|
||
|
||
#define elf_backend_section_from_shdr \
|
||
elf64_alpha_section_from_shdr
|
||
#define elf_backend_section_flags \
|
||
elf64_alpha_section_flags
|
||
#define elf_backend_fake_sections \
|
||
elf64_alpha_fake_sections
|
||
|
||
#define bfd_elf64_bfd_is_local_label_name \
|
||
elf64_alpha_is_local_label_name
|
||
#define bfd_elf64_find_nearest_line \
|
||
elf64_alpha_find_nearest_line
|
||
#define bfd_elf64_bfd_relax_section \
|
||
elf64_alpha_relax_section
|
||
|
||
#define elf_backend_add_symbol_hook \
|
||
elf64_alpha_add_symbol_hook
|
||
#define elf_backend_relocs_compatible \
|
||
_bfd_elf_relocs_compatible
|
||
#define elf_backend_sort_relocs_p \
|
||
elf64_alpha_sort_relocs_p
|
||
#define elf_backend_check_relocs \
|
||
elf64_alpha_check_relocs
|
||
#define elf_backend_create_dynamic_sections \
|
||
elf64_alpha_create_dynamic_sections
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
elf64_alpha_adjust_dynamic_symbol
|
||
#define elf_backend_merge_symbol_attribute \
|
||
elf64_alpha_merge_symbol_attribute
|
||
#define elf_backend_copy_indirect_symbol \
|
||
elf64_alpha_copy_indirect_symbol
|
||
#define elf_backend_early_size_sections \
|
||
elf64_alpha_early_size_sections
|
||
#define elf_backend_late_size_sections \
|
||
elf64_alpha_late_size_sections
|
||
#define elf_backend_omit_section_dynsym \
|
||
_bfd_elf_omit_section_dynsym_all
|
||
#define elf_backend_relocate_section \
|
||
elf64_alpha_relocate_section
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
elf64_alpha_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
elf64_alpha_finish_dynamic_sections
|
||
#define bfd_elf64_bfd_final_link \
|
||
elf64_alpha_final_link
|
||
#define elf_backend_reloc_type_class \
|
||
elf64_alpha_reloc_type_class
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_gc_mark_hook elf64_alpha_gc_mark_hook
|
||
|
||
#define elf_backend_ecoff_debug_swap \
|
||
&elf64_alpha_ecoff_debug_swap
|
||
|
||
#define elf_backend_size_info \
|
||
alpha_elf_size_info
|
||
|
||
#define elf_backend_special_sections \
|
||
elf64_alpha_special_sections
|
||
|
||
#define elf_backend_strip_zero_sized_dynamic_sections \
|
||
_bfd_elf_strip_zero_sized_dynamic_sections
|
||
|
||
/* A few constants that determine how the .plt section is set up. */
|
||
#define elf_backend_want_got_plt 0
|
||
#define elf_backend_plt_readonly 0
|
||
#define elf_backend_want_plt_sym 1
|
||
#define elf_backend_got_header_size 0
|
||
#define elf_backend_dtrel_excludes_plt 1
|
||
|
||
#include "elf64-target.h"
|
||
|
||
/* FreeBSD support. */
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#define TARGET_LITTLE_SYM alpha_elf64_fbsd_vec
|
||
#undef TARGET_LITTLE_NAME
|
||
#define TARGET_LITTLE_NAME "elf64-alpha-freebsd"
|
||
#undef ELF_OSABI
|
||
#define ELF_OSABI ELFOSABI_FREEBSD
|
||
|
||
/* The kernel recognizes executables as valid only if they carry a
|
||
"FreeBSD" label in the ELF header. So we put this label on all
|
||
executables and (for simplicity) also all other object files. */
|
||
|
||
static bool
|
||
elf64_alpha_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
|
||
|
||
if (!_bfd_elf_init_file_header (abfd, info))
|
||
return false;
|
||
|
||
i_ehdrp = elf_elfheader (abfd);
|
||
|
||
/* Put an ABI label supported by FreeBSD >= 4.1. */
|
||
i_ehdrp->e_ident[EI_OSABI] = get_elf_backend_data (abfd)->elf_osabi;
|
||
#ifdef OLD_FREEBSD_ABI_LABEL
|
||
/* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
|
||
memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
|
||
#endif
|
||
return true;
|
||
}
|
||
|
||
#undef elf_backend_init_file_header
|
||
#define elf_backend_init_file_header \
|
||
elf64_alpha_fbsd_init_file_header
|
||
|
||
#undef elf64_bed
|
||
#define elf64_bed elf64_alpha_fbsd_bed
|
||
|
||
#include "elf64-target.h"
|