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42eec46f23
No need to use anything fancy, plain inline works just as well. * bfd-in.h (INLINE): Don't define. * bfd-in2.h: Regenerate. * aoutx.h: Replace use of INLINE with inline. * elf-eh-frame.c: Likewise. * elf32-score7.c: Likewise. * elfxx-mips.c: Likewise. * ihex.c: Likewise. * mach-o.c: Likewise. * mmo.c: Likewise.
3879 lines
114 KiB
C
3879 lines
114 KiB
C
/* 32-bit ELF support for S+core.
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Copyright (C) 2009-2021 Free Software Foundation, Inc.
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Contributed by
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Brain.lin (brain.lin@sunplusct.com)
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Mei Ligang (ligang@sunnorth.com.cn)
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Pei-Lin Tsai (pltsai@sunplus.com)
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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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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "libiberty.h"
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#include "elf-bfd.h"
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#include "elf/score.h"
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#include "elf/common.h"
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#include "elf/internal.h"
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#include "hashtab.h"
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#include "elf32-score.h"
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/* The SCORE ELF linker needs additional information for each symbol in
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the global hash table. */
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struct score_elf_link_hash_entry
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{
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struct elf_link_hash_entry root;
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/* Number of R_SCORE_ABS32, R_SCORE_REL32 relocs against this symbol. */
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unsigned int possibly_dynamic_relocs;
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/* If the R_SCORE_ABS32, R_SCORE_REL32 reloc is against a readonly section. */
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bool readonly_reloc;
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/* We must not create a stub for a symbol that has relocations related to
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taking the function's address, i.e. any but R_SCORE_CALL15 ones. */
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bool no_fn_stub;
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/* Are we forced local? This will only be set if we have converted
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the initial global GOT entry to a local GOT entry. */
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bool forced_local;
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};
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/* Traverse a score ELF linker hash table. */
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#define score_elf_link_hash_traverse(table, func, info) \
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(elf_link_hash_traverse \
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((table), \
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(bool (*) (struct elf_link_hash_entry *, void *)) (func), \
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(info)))
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/* This structure is used to hold .got entries while estimating got sizes. */
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struct score_got_entry
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{
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/* The input bfd in which the symbol is defined. */
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bfd *abfd;
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/* The index of the symbol, as stored in the relocation r_info, if
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we have a local symbol; -1 otherwise. */
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long symndx;
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union
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{
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/* If abfd == NULL, an address that must be stored in the got. */
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bfd_vma address;
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/* If abfd != NULL && symndx != -1, the addend of the relocation
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that should be added to the symbol value. */
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bfd_vma addend;
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/* If abfd != NULL && symndx == -1, the hash table entry
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corresponding to a global symbol in the got (or, local, if
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h->forced_local). */
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struct score_elf_link_hash_entry *h;
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} d;
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/* The offset from the beginning of the .got section to the entry
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corresponding to this symbol+addend. If it's a global symbol
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whose offset is yet to be decided, it's going to be -1. */
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long gotidx;
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};
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/* This structure is passed to score_elf_sort_hash_table_f when sorting
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the dynamic symbols. */
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struct score_elf_hash_sort_data
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{
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/* The symbol in the global GOT with the lowest dynamic symbol table index. */
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struct elf_link_hash_entry *low;
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/* The least dynamic symbol table index corresponding to a symbol with a GOT entry. */
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long min_got_dynindx;
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/* The greatest dynamic symbol table index corresponding to a symbol
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with a GOT entry that is not referenced (e.g., a dynamic symbol
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with dynamic relocations pointing to it from non-primary GOTs). */
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long max_unref_got_dynindx;
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/* The greatest dynamic symbol table index not corresponding to a
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symbol without a GOT entry. */
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long max_non_got_dynindx;
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};
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struct score_got_info
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{
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/* The global symbol in the GOT with the lowest index in the dynamic
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symbol table. */
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struct elf_link_hash_entry *global_gotsym;
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/* The number of global .got entries. */
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unsigned int global_gotno;
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/* The number of local .got entries. */
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unsigned int local_gotno;
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/* The number of local .got entries we have used. */
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unsigned int assigned_gotno;
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/* A hash table holding members of the got. */
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struct htab *got_entries;
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/* In multi-got links, a pointer to the next got (err, rather, most
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of the time, it points to the previous got). */
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struct score_got_info *next;
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};
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/* A structure used to count GOT entries, for GOT entry or ELF symbol table traversal. */
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struct _score_elf_section_data
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{
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struct bfd_elf_section_data elf;
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union
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{
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struct score_got_info *got_info;
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bfd_byte *tdata;
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}
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u;
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};
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#define score_elf_section_data(sec) \
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((struct _score_elf_section_data *) elf_section_data (sec))
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/* The size of a symbol-table entry. */
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#define SCORE_ELF_SYM_SIZE(abfd) \
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(get_elf_backend_data (abfd)->s->sizeof_sym)
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/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
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from smaller values. Start with zero, widen, *then* decrement. */
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#define MINUS_ONE (((bfd_vma)0) - 1)
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#define MINUS_TWO (((bfd_vma)0) - 2)
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#define PDR_SIZE 32
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/* The number of local .got entries we reserve. */
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#define SCORE_RESERVED_GOTNO (2)
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
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/* The offset of $gp from the beginning of the .got section. */
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#define ELF_SCORE_GP_OFFSET(abfd) (0x3ff0)
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/* The maximum size of the GOT for it to be addressable using 15-bit offsets from $gp. */
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#define SCORE_ELF_GOT_MAX_SIZE(abfd) (ELF_SCORE_GP_OFFSET(abfd) + 0x3fff)
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#define SCORE_ELF_STUB_SECTION_NAME (".SCORE.stub")
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#define SCORE_FUNCTION_STUB_SIZE (16)
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#define STUB_LW 0xc3bcc010 /* lw r29, [r28, -0x3ff0] */
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#define STUB_MOVE 0x8323bc56 /* mv r25, r3 */
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#define STUB_LI16 0x87548000 /* ori r26, .dynsym_index */
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#define STUB_BRL 0x801dbc09 /* brl r29 */
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#define SCORE_ELF_GOT_SIZE(abfd) \
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(get_elf_backend_data (abfd)->s->arch_size / 8)
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#define SCORE_ELF_ADD_DYNAMIC_ENTRY(info, tag, val) \
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(_bfd_elf_add_dynamic_entry (info, (bfd_vma) tag, (bfd_vma) val))
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/* The size of an external dynamic table entry. */
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#define SCORE_ELF_DYN_SIZE(abfd) \
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(get_elf_backend_data (abfd)->s->sizeof_dyn)
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/* The size of an external REL relocation. */
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#define SCORE_ELF_REL_SIZE(abfd) \
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(get_elf_backend_data (abfd)->s->sizeof_rel)
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/* The default alignment for sections, as a power of two. */
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#define SCORE_ELF_LOG_FILE_ALIGN(abfd)\
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(get_elf_backend_data (abfd)->s->log_file_align)
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static bfd_byte *hi16_rel_addr;
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/* This will be used when we sort the dynamic relocation records. */
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static bfd *reldyn_sorting_bfd;
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/* SCORE ELF uses two common sections. One is the usual one, and the
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other is for small objects. All the small objects are kept
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together, and then referenced via the gp pointer, which yields
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faster assembler code. This is what we use for the small common
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section. This approach is copied from ecoff.c. */
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static asection score_elf_scom_section;
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static const asymbol score_elf_scom_symbol =
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GLOBAL_SYM_INIT (".scommon", &score_elf_scom_section);
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static asection score_elf_scom_section =
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BFD_FAKE_SECTION (score_elf_scom_section, &score_elf_scom_symbol,
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".scommon", 0, SEC_IS_COMMON | SEC_SMALL_DATA);
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static bfd_reloc_status_type
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score_elf_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
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arelent *reloc_entry,
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asymbol *symbol ATTRIBUTE_UNUSED,
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void * data,
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asection *input_section ATTRIBUTE_UNUSED,
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bfd *output_bfd ATTRIBUTE_UNUSED,
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char **error_message ATTRIBUTE_UNUSED)
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{
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hi16_rel_addr = (bfd_byte *) data + reloc_entry->address;
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_type
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score_elf_lo16_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol ATTRIBUTE_UNUSED,
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void * data,
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asection *input_section,
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bfd *output_bfd ATTRIBUTE_UNUSED,
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char **error_message ATTRIBUTE_UNUSED)
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{
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bfd_vma addend = 0, offset = 0;
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unsigned long val;
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unsigned long hi16_offset, hi16_value, uvalue;
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hi16_value = bfd_get_32 (abfd, hi16_rel_addr);
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hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1;
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addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
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offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1;
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val = reloc_entry->addend;
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if (reloc_entry->address > input_section->size)
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return bfd_reloc_outofrange;
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uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val;
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hi16_offset = (uvalue >> 16) << 1;
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hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
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bfd_put_32 (abfd, hi16_value, hi16_rel_addr);
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offset = (uvalue & 0xffff) << 1;
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addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
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bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address);
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return bfd_reloc_ok;
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}
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/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
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dangerous relocation. */
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static bool
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score_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
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{
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unsigned int count;
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asymbol **sym;
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unsigned int i;
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/* If we've already figured out what GP will be, just return it. */
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*pgp = _bfd_get_gp_value (output_bfd);
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if (*pgp)
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return true;
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count = bfd_get_symcount (output_bfd);
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sym = bfd_get_outsymbols (output_bfd);
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/* The linker script will have created a symbol named `_gp' with the
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appropriate value. */
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if (sym == NULL)
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i = count;
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else
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{
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for (i = 0; i < count; i++, sym++)
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{
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const char *name;
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name = bfd_asymbol_name (*sym);
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if (*name == '_' && strcmp (name, "_gp") == 0)
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{
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*pgp = bfd_asymbol_value (*sym);
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_bfd_set_gp_value (output_bfd, *pgp);
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break;
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}
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}
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}
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if (i >= count)
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{
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/* Only get the error once. */
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*pgp = 4;
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_bfd_set_gp_value (output_bfd, *pgp);
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return false;
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}
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return true;
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}
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/* We have to figure out the gp value, so that we can adjust the
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symbol value correctly. We look up the symbol _gp in the output
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BFD. If we can't find it, we're stuck. We cache it in the ELF
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target data. We don't need to adjust the symbol value for an
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external symbol if we are producing relocatable output. */
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static bfd_reloc_status_type
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score_elf_final_gp (bfd *output_bfd,
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asymbol *symbol,
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bool relocatable,
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char **error_message,
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bfd_vma *pgp)
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{
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if (bfd_is_und_section (symbol->section)
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&& ! relocatable)
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{
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*pgp = 0;
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return bfd_reloc_undefined;
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}
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*pgp = _bfd_get_gp_value (output_bfd);
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if (*pgp == 0
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&& (! relocatable
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|| (symbol->flags & BSF_SECTION_SYM) != 0))
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{
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if (relocatable)
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{
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/* Make up a value. */
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*pgp = symbol->section->output_section->vma + 0x4000;
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_bfd_set_gp_value (output_bfd, *pgp);
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}
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else if (!score_elf_assign_gp (output_bfd, pgp))
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{
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*error_message =
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(char *) _("GP relative relocation when _gp not defined");
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return bfd_reloc_dangerous;
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}
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}
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_type
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score_elf_gprel15_with_gp (bfd *abfd,
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asymbol *symbol,
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arelent *reloc_entry,
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asection *input_section,
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bool relocateable,
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void * data,
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bfd_vma gp ATTRIBUTE_UNUSED)
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{
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bfd_vma relocation;
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unsigned long insn;
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if (bfd_is_com_section (symbol->section))
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relocation = 0;
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else
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relocation = symbol->value;
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relocation += symbol->section->output_section->vma;
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relocation += symbol->section->output_offset;
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if (reloc_entry->address > input_section->size)
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return bfd_reloc_outofrange;
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insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
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if (((reloc_entry->addend & 0xffffc000) != 0)
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&& ((reloc_entry->addend & 0xffffc000) != 0xffffc000))
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return bfd_reloc_overflow;
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insn = (insn & ~0x7fff) | (reloc_entry->addend & 0x7fff);
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bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
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if (relocateable)
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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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static bfd_reloc_status_type
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gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry,
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asection *input_section, bool relocatable,
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void *data, bfd_vma gp)
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{
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bfd_vma relocation;
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bfd_vma val;
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if (bfd_is_com_section (symbol->section))
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relocation = 0;
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else
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relocation = symbol->value;
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relocation += symbol->section->output_section->vma;
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relocation += symbol->section->output_offset;
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if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
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return bfd_reloc_outofrange;
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/* Set val to the offset into the section or symbol. */
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val = reloc_entry->addend;
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if (reloc_entry->howto->partial_inplace)
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val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
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/* Adjust val for the final section location and GP value. If we
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are producing relocatable output, we don't want to do this for
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an external symbol. */
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if (! relocatable
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|| (symbol->flags & BSF_SECTION_SYM) != 0)
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val += relocation - gp;
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if (reloc_entry->howto->partial_inplace)
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bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
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else
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reloc_entry->addend = val;
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if (relocatable)
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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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static bfd_reloc_status_type
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score_elf_gprel15_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message)
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{
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bool relocateable;
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bfd_reloc_status_type ret;
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bfd_vma gp;
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if (output_bfd != NULL
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&& (symbol->flags & BSF_SECTION_SYM) == 0 && reloc_entry->addend == 0)
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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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if (output_bfd != NULL)
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relocateable = true;
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else
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{
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relocateable = false;
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output_bfd = symbol->section->output_section->owner;
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if (output_bfd == NULL)
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return bfd_reloc_undefined;
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}
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ret = score_elf_final_gp (output_bfd, symbol, relocateable, error_message, &gp);
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if (ret != bfd_reloc_ok)
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return ret;
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return score_elf_gprel15_with_gp (abfd, symbol, reloc_entry,
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input_section, relocateable, data, gp);
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}
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/* Do a R_SCORE_GPREL32 relocation. This is a 32 bit value which must
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become the offset from the gp register. */
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static bfd_reloc_status_type
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score_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
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void *data, asection *input_section, bfd *output_bfd,
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char **error_message)
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{
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bool relocatable;
|
|
bfd_reloc_status_type ret;
|
|
bfd_vma gp;
|
|
|
|
/* R_SCORE_GPREL32 relocations are defined for local symbols only. */
|
|
if (output_bfd != NULL
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
|
&& (symbol->flags & BSF_LOCAL) != 0)
|
|
{
|
|
*error_message = (char *)
|
|
_("32bits gp relative relocation occurs for an external symbol");
|
|
return bfd_reloc_outofrange;
|
|
}
|
|
|
|
if (output_bfd != NULL)
|
|
relocatable = true;
|
|
else
|
|
{
|
|
relocatable = false;
|
|
output_bfd = symbol->section->output_section->owner;
|
|
}
|
|
|
|
ret = score_elf_final_gp (output_bfd, symbol, relocatable, error_message, &gp);
|
|
if (ret != bfd_reloc_ok)
|
|
return ret;
|
|
|
|
gp = 0;
|
|
return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
|
|
relocatable, data, gp);
|
|
}
|
|
|
|
/* A howto special_function for R_SCORE_GOT15 relocations. This is just
|
|
like any other 16-bit relocation when applied to global symbols, but is
|
|
treated in the same as R_SCORE_HI16 when applied to local symbols. */
|
|
|
|
static bfd_reloc_status_type
|
|
score_elf_got15_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
|
|
void *data, asection *input_section,
|
|
bfd *output_bfd, char **error_message)
|
|
{
|
|
if ((symbol->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
|
|
|| bfd_is_und_section (bfd_asymbol_section (symbol))
|
|
|| bfd_is_com_section (bfd_asymbol_section (symbol)))
|
|
/* The relocation is against a global symbol. */
|
|
return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
|
|
input_section, output_bfd,
|
|
error_message);
|
|
|
|
return score_elf_hi16_reloc (abfd, reloc_entry, symbol, data,
|
|
input_section, output_bfd, error_message);
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
score_elf_got_lo16_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol ATTRIBUTE_UNUSED,
|
|
void * data,
|
|
asection *input_section,
|
|
bfd *output_bfd ATTRIBUTE_UNUSED,
|
|
char **error_message ATTRIBUTE_UNUSED)
|
|
{
|
|
bfd_vma addend = 0, offset = 0;
|
|
signed long val;
|
|
signed long hi16_offset, hi16_value, uvalue;
|
|
|
|
hi16_value = bfd_get_32 (abfd, hi16_rel_addr);
|
|
hi16_offset = ((((hi16_value >> 16) & 0x3) << 15) | (hi16_value & 0x7fff)) >> 1;
|
|
addend = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
|
offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1;
|
|
val = reloc_entry->addend;
|
|
if (reloc_entry->address > input_section->size)
|
|
return bfd_reloc_outofrange;
|
|
uvalue = ((hi16_offset << 16) | (offset & 0xffff)) + val;
|
|
if ((uvalue > -0x8000) && (uvalue < 0x7fff))
|
|
hi16_offset = 0;
|
|
else
|
|
hi16_offset = (uvalue >> 16) & 0x7fff;
|
|
hi16_value = (hi16_value & ~0x37fff) | (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
|
|
bfd_put_32 (abfd, hi16_value, hi16_rel_addr);
|
|
offset = (uvalue & 0xffff) << 1;
|
|
addend = (addend & ~0x37fff) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
|
|
bfd_put_32 (abfd, addend, (bfd_byte *) data + reloc_entry->address);
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
static reloc_howto_type elf32_score_howto_table[] =
|
|
{
|
|
/* No relocation. */
|
|
HOWTO (R_SCORE_NONE, /* type */
|
|
0, /* rightshift */
|
|
3, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_NONE", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE_HI16 */
|
|
HOWTO (R_SCORE_HI16, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
score_elf_hi16_reloc, /* special_function */
|
|
"R_SCORE_HI16", /* name */
|
|
true, /* partial_inplace */
|
|
0x37fff, /* src_mask */
|
|
0x37fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE_LO16 */
|
|
HOWTO (R_SCORE_LO16, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
score_elf_lo16_reloc, /* special_function */
|
|
"R_SCORE_LO16", /* name */
|
|
true, /* partial_inplace */
|
|
0x37fff, /* src_mask */
|
|
0x37fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE_BCMP */
|
|
HOWTO (R_SCORE_BCMP, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_BCMP", /* name */
|
|
true, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
HOWTO (R_SCORE_24, /* type */
|
|
1, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
24, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_24", /* name */
|
|
false, /* partial_inplace */
|
|
0x3ff7fff, /* src_mask */
|
|
0x3ff7fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/*R_SCORE_PC19 */
|
|
HOWTO (R_SCORE_PC19, /* type */
|
|
1, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
19, /* bitsize */
|
|
true, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_PC19", /* name */
|
|
false, /* partial_inplace */
|
|
0x3ff03fe, /* src_mask */
|
|
0x3ff03fe, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/*R_SCORE16_11 */
|
|
HOWTO (R_SCORE16_11, /* type */
|
|
1, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
11, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE16_11", /* name */
|
|
false, /* partial_inplace */
|
|
0x000000ffe, /* src_mask */
|
|
0x000000ffe, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE16_PC8 */
|
|
HOWTO (R_SCORE16_PC8, /* type */
|
|
1, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
8, /* bitsize */
|
|
true, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE16_PC8", /* name */
|
|
false, /* partial_inplace */
|
|
0x000000ff, /* src_mask */
|
|
0x000000ff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 32 bit absolute */
|
|
HOWTO (R_SCORE_ABS32, /* type 8 */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_ABS32", /* name */
|
|
false, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 16 bit absolute */
|
|
HOWTO (R_SCORE_ABS16, /* type 11 */
|
|
0, /* rightshift */
|
|
1, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_bitfield, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_ABS16", /* name */
|
|
false, /* partial_inplace */
|
|
0x0000ffff, /* src_mask */
|
|
0x0000ffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE_DUMMY2 */
|
|
HOWTO (R_SCORE_DUMMY2, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_DUMMY2", /* name */
|
|
true, /* partial_inplace */
|
|
0x00007fff, /* src_mask */
|
|
0x00007fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE_GP15 */
|
|
HOWTO (R_SCORE_GP15, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
score_elf_gprel15_reloc,/* special_function */
|
|
"R_SCORE_GP15", /* name */
|
|
true, /* partial_inplace */
|
|
0x00007fff, /* src_mask */
|
|
0x00007fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable hierarchy. */
|
|
HOWTO (R_SCORE_GNU_VTINHERIT, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
NULL, /* special_function */
|
|
"R_SCORE_GNU_VTINHERIT", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* GNU extension to record C++ vtable member usage */
|
|
HOWTO (R_SCORE_GNU_VTENTRY, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
0, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
_bfd_elf_rel_vtable_reloc_fn, /* special_function */
|
|
"R_SCORE_GNU_VTENTRY", /* name */
|
|
false, /* partial_inplace */
|
|
0, /* src_mask */
|
|
0, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* Reference to global offset table. */
|
|
HOWTO (R_SCORE_GOT15, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
score_elf_got15_reloc, /* special_function */
|
|
"R_SCORE_GOT15", /* name */
|
|
true, /* partial_inplace */
|
|
0x00007fff, /* src_mask */
|
|
0x00007fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* Low 16 bits of displacement in global offset table. */
|
|
HOWTO (R_SCORE_GOT_LO16, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
score_elf_got_lo16_reloc, /* special_function */
|
|
"R_SCORE_GOT_LO16", /* name */
|
|
true, /* partial_inplace */
|
|
0x37ffe, /* src_mask */
|
|
0x37ffe, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 15 bit call through global offset table. */
|
|
HOWTO (R_SCORE_CALL15, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_signed, /* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_CALL15", /* name */
|
|
true, /* partial_inplace */
|
|
0x00007fff, /* src_mask */
|
|
0x00007fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 32 bit GP relative reference. */
|
|
HOWTO (R_SCORE_GPREL32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
score_elf_gprel32_reloc, /* special_function */
|
|
"R_SCORE_GPREL32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* 32 bit symbol relative relocation. */
|
|
HOWTO (R_SCORE_REL32, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
32, /* bitsize */
|
|
false, /* pc_relative */
|
|
0, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
bfd_elf_generic_reloc, /* special_function */
|
|
"R_SCORE_REL32", /* name */
|
|
true, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
|
|
/* R_SCORE_DUMMY_HI16 */
|
|
HOWTO (R_SCORE_DUMMY_HI16, /* type */
|
|
0, /* rightshift */
|
|
2, /* size (0 = byte, 1 = short, 2 = long) */
|
|
16, /* bitsize */
|
|
false, /* pc_relative */
|
|
1, /* bitpos */
|
|
complain_overflow_dont,/* complain_on_overflow */
|
|
score_elf_hi16_reloc, /* special_function */
|
|
"R_SCORE_DUMMY_HI16", /* name */
|
|
true, /* partial_inplace */
|
|
0x37fff, /* src_mask */
|
|
0x37fff, /* dst_mask */
|
|
false), /* pcrel_offset */
|
|
};
|
|
|
|
struct score_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
static const struct score_reloc_map elf32_score_reloc_map[] =
|
|
{
|
|
{BFD_RELOC_NONE, R_SCORE_NONE},
|
|
{BFD_RELOC_HI16_S, R_SCORE_HI16},
|
|
{BFD_RELOC_LO16, R_SCORE_LO16},
|
|
{BFD_RELOC_SCORE_BCMP, R_SCORE_BCMP},
|
|
{BFD_RELOC_SCORE_JMP, R_SCORE_24},
|
|
{BFD_RELOC_SCORE_BRANCH, R_SCORE_PC19},
|
|
{BFD_RELOC_SCORE16_JMP, R_SCORE16_11},
|
|
{BFD_RELOC_SCORE16_BRANCH, R_SCORE16_PC8},
|
|
{BFD_RELOC_32, R_SCORE_ABS32},
|
|
{BFD_RELOC_16, R_SCORE_ABS16},
|
|
{BFD_RELOC_SCORE_DUMMY2, R_SCORE_DUMMY2},
|
|
{BFD_RELOC_SCORE_GPREL15, R_SCORE_GP15},
|
|
{BFD_RELOC_VTABLE_INHERIT, R_SCORE_GNU_VTINHERIT},
|
|
{BFD_RELOC_VTABLE_ENTRY, R_SCORE_GNU_VTENTRY},
|
|
{BFD_RELOC_SCORE_GOT15, R_SCORE_GOT15},
|
|
{BFD_RELOC_SCORE_GOT_LO16, R_SCORE_GOT_LO16},
|
|
{BFD_RELOC_SCORE_CALL15, R_SCORE_CALL15},
|
|
{BFD_RELOC_GPREL32, R_SCORE_GPREL32},
|
|
{BFD_RELOC_32_PCREL, R_SCORE_REL32},
|
|
{BFD_RELOC_SCORE_DUMMY_HI16, R_SCORE_DUMMY_HI16},
|
|
};
|
|
|
|
static inline hashval_t
|
|
score_elf_hash_bfd_vma (bfd_vma addr)
|
|
{
|
|
#ifdef BFD64
|
|
return addr + (addr >> 32);
|
|
#else
|
|
return addr;
|
|
#endif
|
|
}
|
|
|
|
/* got_entries only match if they're identical, except for gotidx, so
|
|
use all fields to compute the hash, and compare the appropriate
|
|
union members. */
|
|
|
|
static hashval_t
|
|
score_elf_got_entry_hash (const void *entry_)
|
|
{
|
|
const struct score_got_entry *entry = (struct score_got_entry *) entry_;
|
|
|
|
return entry->symndx
|
|
+ (! entry->abfd ? score_elf_hash_bfd_vma (entry->d.address)
|
|
: entry->abfd->id
|
|
+ (entry->symndx >= 0 ? score_elf_hash_bfd_vma (entry->d.addend)
|
|
: entry->d.h->root.root.root.hash));
|
|
}
|
|
|
|
static int
|
|
score_elf_got_entry_eq (const void *entry1, const void *entry2)
|
|
{
|
|
const struct score_got_entry *e1 = (struct score_got_entry *) entry1;
|
|
const struct score_got_entry *e2 = (struct score_got_entry *) entry2;
|
|
|
|
return e1->abfd == e2->abfd && e1->symndx == e2->symndx
|
|
&& (! e1->abfd ? e1->d.address == e2->d.address
|
|
: e1->symndx >= 0 ? e1->d.addend == e2->d.addend
|
|
: e1->d.h == e2->d.h);
|
|
}
|
|
|
|
/* If H needs a GOT entry, assign it the highest available dynamic
|
|
index. Otherwise, assign it the lowest available dynamic
|
|
index. */
|
|
|
|
static bool
|
|
score_elf_sort_hash_table_f (struct score_elf_link_hash_entry *h, void *data)
|
|
{
|
|
struct score_elf_hash_sort_data *hsd = data;
|
|
|
|
/* Symbols without dynamic symbol table entries aren't interesting at all. */
|
|
if (h->root.dynindx == -1)
|
|
return true;
|
|
|
|
/* Global symbols that need GOT entries that are not explicitly
|
|
referenced are marked with got offset 2. Those that are
|
|
referenced get a 1, and those that don't need GOT entries get
|
|
-1. */
|
|
if (h->root.got.offset == 2)
|
|
{
|
|
if (hsd->max_unref_got_dynindx == hsd->min_got_dynindx)
|
|
hsd->low = (struct elf_link_hash_entry *) h;
|
|
h->root.dynindx = hsd->max_unref_got_dynindx++;
|
|
}
|
|
else if (h->root.got.offset != 1)
|
|
h->root.dynindx = hsd->max_non_got_dynindx++;
|
|
else
|
|
{
|
|
h->root.dynindx = --hsd->min_got_dynindx;
|
|
hsd->low = (struct elf_link_hash_entry *) h;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static asection *
|
|
score_elf_got_section (bfd *abfd, bool maybe_excluded)
|
|
{
|
|
asection *sgot = bfd_get_linker_section (abfd, ".got");
|
|
|
|
if (sgot == NULL || (! maybe_excluded && (sgot->flags & SEC_EXCLUDE) != 0))
|
|
return NULL;
|
|
return sgot;
|
|
}
|
|
|
|
/* Returns the GOT information associated with the link indicated by
|
|
INFO. If SGOTP is non-NULL, it is filled in with the GOT section. */
|
|
|
|
static struct score_got_info *
|
|
score_elf_got_info (bfd *abfd, asection **sgotp)
|
|
{
|
|
asection *sgot;
|
|
struct score_got_info *g;
|
|
|
|
sgot = score_elf_got_section (abfd, true);
|
|
BFD_ASSERT (sgot != NULL);
|
|
BFD_ASSERT (elf_section_data (sgot) != NULL);
|
|
g = score_elf_section_data (sgot)->u.got_info;
|
|
BFD_ASSERT (g != NULL);
|
|
|
|
if (sgotp)
|
|
*sgotp = sgot;
|
|
return g;
|
|
}
|
|
|
|
/* Sort the dynamic symbol table so that symbols that need GOT entries
|
|
appear towards the end. This reduces the amount of GOT space
|
|
required. MAX_LOCAL is used to set the number of local symbols
|
|
known to be in the dynamic symbol table. During
|
|
s7_bfd_score_elf_size_dynamic_sections, this value is 1. Afterward, the
|
|
section symbols are added and the count is higher. */
|
|
|
|
static bool
|
|
score_elf_sort_hash_table (struct bfd_link_info *info,
|
|
unsigned long max_local)
|
|
{
|
|
struct score_elf_hash_sort_data hsd;
|
|
struct score_got_info *g;
|
|
bfd *dynobj;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
|
g = score_elf_got_info (dynobj, NULL);
|
|
|
|
hsd.low = NULL;
|
|
hsd.max_unref_got_dynindx =
|
|
hsd.min_got_dynindx = elf_hash_table (info)->dynsymcount
|
|
/* In the multi-got case, assigned_gotno of the master got_info
|
|
indicate the number of entries that aren't referenced in the
|
|
primary GOT, but that must have entries because there are
|
|
dynamic relocations that reference it. Since they aren't
|
|
referenced, we move them to the end of the GOT, so that they
|
|
don't prevent other entries that are referenced from getting
|
|
too large offsets. */
|
|
- (g->next ? g->assigned_gotno : 0);
|
|
hsd.max_non_got_dynindx = max_local;
|
|
score_elf_link_hash_traverse (elf_hash_table (info),
|
|
score_elf_sort_hash_table_f,
|
|
&hsd);
|
|
|
|
/* There should have been enough room in the symbol table to
|
|
accommodate both the GOT and non-GOT symbols. */
|
|
BFD_ASSERT (hsd.max_non_got_dynindx <= hsd.min_got_dynindx);
|
|
BFD_ASSERT ((unsigned long) hsd.max_unref_got_dynindx
|
|
<= elf_hash_table (info)->dynsymcount);
|
|
|
|
/* Now we know which dynamic symbol has the lowest dynamic symbol
|
|
table index in the GOT. */
|
|
g->global_gotsym = hsd.low;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Returns the first relocation of type r_type found, beginning with
|
|
RELOCATION. RELEND is one-past-the-end of the relocation table. */
|
|
|
|
static const Elf_Internal_Rela *
|
|
score_elf_next_relocation (bfd *abfd ATTRIBUTE_UNUSED, unsigned int r_type,
|
|
const Elf_Internal_Rela *relocation,
|
|
const Elf_Internal_Rela *relend)
|
|
{
|
|
while (relocation < relend)
|
|
{
|
|
if (ELF32_R_TYPE (relocation->r_info) == r_type)
|
|
return relocation;
|
|
|
|
++relocation;
|
|
}
|
|
|
|
/* We didn't find it. */
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
|
|
/* This function is called via qsort() to sort the dynamic relocation
|
|
entries by increasing r_symndx value. */
|
|
static int
|
|
score_elf_sort_dynamic_relocs (const void *arg1, const void *arg2)
|
|
{
|
|
Elf_Internal_Rela int_reloc1;
|
|
Elf_Internal_Rela int_reloc2;
|
|
|
|
bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg1, &int_reloc1);
|
|
bfd_elf32_swap_reloc_in (reldyn_sorting_bfd, arg2, &int_reloc2);
|
|
|
|
return (ELF32_R_SYM (int_reloc1.r_info) - ELF32_R_SYM (int_reloc2.r_info));
|
|
}
|
|
|
|
/* Return whether a relocation is against a local symbol. */
|
|
static bool
|
|
score_elf_local_relocation_p (bfd *input_bfd,
|
|
const Elf_Internal_Rela *relocation,
|
|
asection **local_sections,
|
|
bool check_forced)
|
|
{
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct score_elf_link_hash_entry *h;
|
|
size_t extsymoff;
|
|
|
|
r_symndx = ELF32_R_SYM (relocation->r_info);
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
|
|
|
|
if (r_symndx < extsymoff)
|
|
return true;
|
|
if (elf_bad_symtab (input_bfd) && local_sections[r_symndx] != NULL)
|
|
return true;
|
|
|
|
if (check_forced)
|
|
{
|
|
/* Look up the hash table to check whether the symbol was forced local. */
|
|
h = (struct score_elf_link_hash_entry *)
|
|
elf_sym_hashes (input_bfd) [r_symndx - extsymoff];
|
|
/* Find the real hash-table entry for this symbol. */
|
|
while (h->root.root.type == bfd_link_hash_indirect
|
|
|| h->root.root.type == bfd_link_hash_warning)
|
|
h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link;
|
|
if (h->root.forced_local)
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* Returns the dynamic relocation section for DYNOBJ. */
|
|
|
|
static asection *
|
|
score_elf_rel_dyn_section (bfd *dynobj, bool create_p)
|
|
{
|
|
static const char dname[] = ".rel.dyn";
|
|
asection *sreloc;
|
|
|
|
sreloc = bfd_get_linker_section (dynobj, dname);
|
|
if (sreloc == NULL && create_p)
|
|
{
|
|
sreloc = bfd_make_section_anyway_with_flags (dynobj, dname,
|
|
(SEC_ALLOC
|
|
| SEC_LOAD
|
|
| SEC_HAS_CONTENTS
|
|
| SEC_IN_MEMORY
|
|
| SEC_LINKER_CREATED
|
|
| SEC_READONLY));
|
|
if (sreloc == NULL
|
|
|| !bfd_set_section_alignment (sreloc,
|
|
SCORE_ELF_LOG_FILE_ALIGN (dynobj)))
|
|
return NULL;
|
|
}
|
|
return sreloc;
|
|
}
|
|
|
|
static void
|
|
score_elf_allocate_dynamic_relocations (bfd *abfd, unsigned int n)
|
|
{
|
|
asection *s;
|
|
|
|
s = score_elf_rel_dyn_section (abfd, false);
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
if (s->size == 0)
|
|
{
|
|
/* Make room for a null element. */
|
|
s->size += SCORE_ELF_REL_SIZE (abfd);
|
|
++s->reloc_count;
|
|
}
|
|
s->size += n * SCORE_ELF_REL_SIZE (abfd);
|
|
}
|
|
|
|
/* Create a rel.dyn relocation for the dynamic linker to resolve. REL
|
|
is the original relocation, which is now being transformed into a
|
|
dynamic relocation. The ADDENDP is adjusted if necessary; the
|
|
caller should store the result in place of the original addend. */
|
|
|
|
static bool
|
|
score_elf_create_dynamic_relocation (bfd *output_bfd,
|
|
struct bfd_link_info *info,
|
|
const Elf_Internal_Rela *rel,
|
|
struct score_elf_link_hash_entry *h,
|
|
bfd_vma symbol,
|
|
bfd_vma *addendp, asection *input_section)
|
|
{
|
|
Elf_Internal_Rela outrel[3];
|
|
asection *sreloc;
|
|
bfd *dynobj;
|
|
int r_type;
|
|
long indx;
|
|
bool defined_p;
|
|
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
sreloc = score_elf_rel_dyn_section (dynobj, false);
|
|
BFD_ASSERT (sreloc != NULL);
|
|
BFD_ASSERT (sreloc->contents != NULL);
|
|
BFD_ASSERT (sreloc->reloc_count * SCORE_ELF_REL_SIZE (output_bfd) < sreloc->size);
|
|
|
|
outrel[0].r_offset =
|
|
_bfd_elf_section_offset (output_bfd, info, input_section, rel[0].r_offset);
|
|
outrel[1].r_offset =
|
|
_bfd_elf_section_offset (output_bfd, info, input_section, rel[1].r_offset);
|
|
outrel[2].r_offset =
|
|
_bfd_elf_section_offset (output_bfd, info, input_section, rel[2].r_offset);
|
|
|
|
if (outrel[0].r_offset == MINUS_ONE)
|
|
/* The relocation field has been deleted. */
|
|
return true;
|
|
|
|
if (outrel[0].r_offset == MINUS_TWO)
|
|
{
|
|
/* The relocation field has been converted into a relative value of
|
|
some sort. Functions like _bfd_elf_write_section_eh_frame expect
|
|
the field to be fully relocated, so add in the symbol's value. */
|
|
*addendp += symbol;
|
|
return true;
|
|
}
|
|
|
|
/* We must now calculate the dynamic symbol table index to use
|
|
in the relocation. */
|
|
if (h != NULL
|
|
&& (! info->symbolic || !h->root.def_regular)
|
|
/* h->root.dynindx may be -1 if this symbol was marked to
|
|
become local. */
|
|
&& h->root.dynindx != -1)
|
|
{
|
|
indx = h->root.dynindx;
|
|
/* ??? glibc's ld.so just adds the final GOT entry to the
|
|
relocation field. It therefore treats relocs against
|
|
defined symbols in the same way as relocs against
|
|
undefined symbols. */
|
|
defined_p = false;
|
|
}
|
|
else
|
|
{
|
|
indx = 0;
|
|
defined_p = true;
|
|
}
|
|
|
|
/* If the relocation was previously an absolute relocation and
|
|
this symbol will not be referred to by the relocation, we must
|
|
adjust it by the value we give it in the dynamic symbol table.
|
|
Otherwise leave the job up to the dynamic linker. */
|
|
if (defined_p && r_type != R_SCORE_REL32)
|
|
*addendp += symbol;
|
|
|
|
/* The relocation is always an REL32 relocation because we don't
|
|
know where the shared library will wind up at load-time. */
|
|
outrel[0].r_info = ELF32_R_INFO ((unsigned long) indx, R_SCORE_REL32);
|
|
|
|
/* For strict adherence to the ABI specification, we should
|
|
generate a R_SCORE_64 relocation record by itself before the
|
|
_REL32/_64 record as well, such that the addend is read in as
|
|
a 64-bit value (REL32 is a 32-bit relocation, after all).
|
|
However, since none of the existing ELF64 SCORE dynamic
|
|
loaders seems to care, we don't waste space with these
|
|
artificial relocations. If this turns out to not be true,
|
|
score_elf_allocate_dynamic_relocations() should be tweaked so
|
|
as to make room for a pair of dynamic relocations per
|
|
invocation if ABI_64_P, and here we should generate an
|
|
additional relocation record with R_SCORE_64 by itself for a
|
|
NULL symbol before this relocation record. */
|
|
outrel[1].r_info = ELF32_R_INFO (0, R_SCORE_NONE);
|
|
outrel[2].r_info = ELF32_R_INFO (0, R_SCORE_NONE);
|
|
|
|
/* Adjust the output offset of the relocation to reference the
|
|
correct location in the output file. */
|
|
outrel[0].r_offset += (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
outrel[1].r_offset += (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
outrel[2].r_offset += (input_section->output_section->vma
|
|
+ input_section->output_offset);
|
|
|
|
/* Put the relocation back out. We have to use the special
|
|
relocation outputter in the 64-bit case since the 64-bit
|
|
relocation format is non-standard. */
|
|
bfd_elf32_swap_reloc_out
|
|
(output_bfd, &outrel[0],
|
|
(sreloc->contents + sreloc->reloc_count * sizeof (Elf32_External_Rel)));
|
|
|
|
/* We've now added another relocation. */
|
|
++sreloc->reloc_count;
|
|
|
|
/* Make sure the output section is writable. The dynamic linker
|
|
will be writing to it. */
|
|
elf_section_data (input_section->output_section)->this_hdr.sh_flags |= SHF_WRITE;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
score_elf_create_got_section (bfd *abfd,
|
|
struct bfd_link_info *info,
|
|
bool maybe_exclude)
|
|
{
|
|
flagword flags;
|
|
asection *s;
|
|
struct elf_link_hash_entry *h;
|
|
struct bfd_link_hash_entry *bh;
|
|
struct score_got_info *g;
|
|
size_t amt;
|
|
|
|
/* This function may be called more than once. */
|
|
s = score_elf_got_section (abfd, true);
|
|
if (s)
|
|
{
|
|
if (! maybe_exclude)
|
|
s->flags &= ~SEC_EXCLUDE;
|
|
return true;
|
|
}
|
|
|
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_LINKER_CREATED);
|
|
|
|
if (maybe_exclude)
|
|
flags |= SEC_EXCLUDE;
|
|
|
|
/* We have to use an alignment of 2**4 here because this is hardcoded
|
|
in the function stub generation and in the linker script. */
|
|
s = bfd_make_section_anyway_with_flags (abfd, ".got", flags);
|
|
elf_hash_table (info)->sgot = s;
|
|
if (s == NULL
|
|
|| !bfd_set_section_alignment (s, 4))
|
|
return false;
|
|
|
|
/* Define the symbol _GLOBAL_OFFSET_TABLE_. 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. */
|
|
bh = NULL;
|
|
if (! (_bfd_generic_link_add_one_symbol
|
|
(info, abfd, "_GLOBAL_OFFSET_TABLE_", BSF_GLOBAL, s,
|
|
0, NULL, false, get_elf_backend_data (abfd)->collect, &bh)))
|
|
return false;
|
|
|
|
h = (struct elf_link_hash_entry *) bh;
|
|
h->non_elf = 0;
|
|
h->def_regular = 1;
|
|
h->type = STT_OBJECT;
|
|
elf_hash_table (info)->hgot = h;
|
|
|
|
if (bfd_link_pic (info)
|
|
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return false;
|
|
|
|
amt = sizeof (struct score_got_info);
|
|
g = bfd_alloc (abfd, amt);
|
|
if (g == NULL)
|
|
return false;
|
|
|
|
g->global_gotsym = NULL;
|
|
g->global_gotno = 0;
|
|
|
|
g->local_gotno = SCORE_RESERVED_GOTNO;
|
|
g->assigned_gotno = SCORE_RESERVED_GOTNO;
|
|
g->next = NULL;
|
|
|
|
g->got_entries = htab_try_create (1, score_elf_got_entry_hash,
|
|
score_elf_got_entry_eq, NULL);
|
|
if (g->got_entries == NULL)
|
|
return false;
|
|
score_elf_section_data (s)->u.got_info = g;
|
|
score_elf_section_data (s)->elf.this_hdr.sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Calculate the %high function. */
|
|
|
|
static bfd_vma
|
|
score_elf_high (bfd_vma value)
|
|
{
|
|
return ((value + (bfd_vma) 0x8000) >> 16) & 0xffff;
|
|
}
|
|
|
|
/* Create a local GOT entry for VALUE. Return the index of the entry,
|
|
or -1 if it could not be created. */
|
|
|
|
static struct score_got_entry *
|
|
score_elf_create_local_got_entry (bfd *abfd,
|
|
bfd *ibfd ATTRIBUTE_UNUSED,
|
|
struct score_got_info *gg,
|
|
asection *sgot, bfd_vma value,
|
|
unsigned long r_symndx ATTRIBUTE_UNUSED,
|
|
struct score_elf_link_hash_entry *h ATTRIBUTE_UNUSED,
|
|
int r_type ATTRIBUTE_UNUSED)
|
|
{
|
|
struct score_got_entry entry, **loc;
|
|
struct score_got_info *g;
|
|
|
|
entry.abfd = NULL;
|
|
entry.symndx = -1;
|
|
entry.d.address = value;
|
|
|
|
g = gg;
|
|
loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT);
|
|
if (*loc)
|
|
return *loc;
|
|
|
|
entry.gotidx = SCORE_ELF_GOT_SIZE (abfd) * g->assigned_gotno++;
|
|
|
|
*loc = bfd_alloc (abfd, sizeof entry);
|
|
|
|
if (! *loc)
|
|
return NULL;
|
|
|
|
memcpy (*loc, &entry, sizeof entry);
|
|
|
|
if (g->assigned_gotno >= g->local_gotno)
|
|
{
|
|
(*loc)->gotidx = -1;
|
|
/* We didn't allocate enough space in the GOT. */
|
|
_bfd_error_handler
|
|
(_("not enough GOT space for local GOT entries"));
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return NULL;
|
|
}
|
|
|
|
bfd_put_32 (abfd, value, (sgot->contents + entry.gotidx));
|
|
|
|
return *loc;
|
|
}
|
|
|
|
/* Find a GOT entry whose higher-order 16 bits are the same as those
|
|
for value. Return the index into the GOT for this entry. */
|
|
|
|
static bfd_vma
|
|
score_elf_got16_entry (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
|
|
bfd_vma value, bool external)
|
|
{
|
|
asection *sgot;
|
|
struct score_got_info *g;
|
|
struct score_got_entry *entry;
|
|
|
|
if (!external)
|
|
{
|
|
/* Although the ABI says that it is "the high-order 16 bits" that we
|
|
want, it is really the %high value. The complete value is
|
|
calculated with a `addiu' of a LO16 relocation, just as with a
|
|
HI16/LO16 pair. */
|
|
value = score_elf_high (value) << 16;
|
|
}
|
|
|
|
g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
|
|
|
|
entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value, 0, NULL,
|
|
R_SCORE_GOT15);
|
|
if (entry)
|
|
return entry->gotidx;
|
|
else
|
|
return MINUS_ONE;
|
|
}
|
|
|
|
void
|
|
s7_bfd_score_elf_hide_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *entry,
|
|
bool force_local)
|
|
{
|
|
bfd *dynobj;
|
|
asection *got;
|
|
struct score_got_info *g;
|
|
struct score_elf_link_hash_entry *h;
|
|
|
|
h = (struct score_elf_link_hash_entry *) entry;
|
|
if (h->forced_local)
|
|
return;
|
|
h->forced_local = true;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
if (dynobj != NULL && force_local)
|
|
{
|
|
got = score_elf_got_section (dynobj, false);
|
|
if (got == NULL)
|
|
return;
|
|
g = score_elf_section_data (got)->u.got_info;
|
|
|
|
if (g->next)
|
|
{
|
|
struct score_got_entry e;
|
|
struct score_got_info *gg = g;
|
|
|
|
/* Since we're turning what used to be a global symbol into a
|
|
local one, bump up the number of local entries of each GOT
|
|
that had an entry for it. This will automatically decrease
|
|
the number of global entries, since global_gotno is actually
|
|
the upper limit of global entries. */
|
|
e.abfd = dynobj;
|
|
e.symndx = -1;
|
|
e.d.h = h;
|
|
|
|
for (g = g->next; g != gg; g = g->next)
|
|
if (htab_find (g->got_entries, &e))
|
|
{
|
|
BFD_ASSERT (g->global_gotno > 0);
|
|
g->local_gotno++;
|
|
g->global_gotno--;
|
|
}
|
|
|
|
/* If this was a global symbol forced into the primary GOT, we
|
|
no longer need an entry for it. We can't release the entry
|
|
at this point, but we must at least stop counting it as one
|
|
of the symbols that required a forced got entry. */
|
|
if (h->root.got.offset == 2)
|
|
{
|
|
BFD_ASSERT (gg->assigned_gotno > 0);
|
|
gg->assigned_gotno--;
|
|
}
|
|
}
|
|
else if (g->global_gotno == 0 && g->global_gotsym == NULL)
|
|
/* If we haven't got through GOT allocation yet, just bump up the
|
|
number of local entries, as this symbol won't be counted as
|
|
global. */
|
|
g->local_gotno++;
|
|
else if (h->root.got.offset == 1)
|
|
{
|
|
/* If we're past non-multi-GOT allocation and this symbol had
|
|
been marked for a global got entry, give it a local entry
|
|
instead. */
|
|
BFD_ASSERT (g->global_gotno > 0);
|
|
g->local_gotno++;
|
|
g->global_gotno--;
|
|
}
|
|
}
|
|
|
|
_bfd_elf_link_hash_hide_symbol (info, &h->root, force_local);
|
|
}
|
|
|
|
/* If H is a symbol that needs a global GOT entry, but has a dynamic
|
|
symbol table index lower than any we've seen to date, record it for
|
|
posterity. */
|
|
|
|
static bool
|
|
score_elf_record_global_got_symbol (struct elf_link_hash_entry *h,
|
|
bfd *abfd,
|
|
struct bfd_link_info *info,
|
|
struct score_got_info *g)
|
|
{
|
|
struct score_got_entry entry, **loc;
|
|
|
|
/* A global symbol in the GOT must also be in the dynamic symbol table. */
|
|
if (h->dynindx == -1)
|
|
{
|
|
switch (ELF_ST_VISIBILITY (h->other))
|
|
{
|
|
case STV_INTERNAL:
|
|
case STV_HIDDEN:
|
|
s7_bfd_score_elf_hide_symbol (info, h, true);
|
|
break;
|
|
}
|
|
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return false;
|
|
}
|
|
|
|
entry.abfd = abfd;
|
|
entry.symndx = -1;
|
|
entry.d.h = (struct score_elf_link_hash_entry *) h;
|
|
|
|
loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT);
|
|
|
|
/* If we've already marked this entry as needing GOT space, we don't
|
|
need to do it again. */
|
|
if (*loc)
|
|
return true;
|
|
|
|
*loc = bfd_alloc (abfd, sizeof entry);
|
|
if (! *loc)
|
|
return false;
|
|
|
|
entry.gotidx = -1;
|
|
|
|
memcpy (*loc, &entry, sizeof (entry));
|
|
|
|
if (h->got.offset != MINUS_ONE)
|
|
return true;
|
|
|
|
/* By setting this to a value other than -1, we are indicating that
|
|
there needs to be a GOT entry for H. Avoid using zero, as the
|
|
generic ELF copy_indirect_symbol tests for <= 0. */
|
|
h->got.offset = 1;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Reserve space in G for a GOT entry containing the value of symbol
|
|
SYMNDX in input bfd ABDF, plus ADDEND. */
|
|
|
|
static bool
|
|
score_elf_record_local_got_symbol (bfd *abfd,
|
|
long symndx,
|
|
bfd_vma addend,
|
|
struct score_got_info *g)
|
|
{
|
|
struct score_got_entry entry, **loc;
|
|
|
|
entry.abfd = abfd;
|
|
entry.symndx = symndx;
|
|
entry.d.addend = addend;
|
|
loc = (struct score_got_entry **) htab_find_slot (g->got_entries, &entry, INSERT);
|
|
|
|
if (*loc)
|
|
return true;
|
|
|
|
entry.gotidx = g->local_gotno++;
|
|
|
|
*loc = bfd_alloc (abfd, sizeof(entry));
|
|
if (! *loc)
|
|
return false;
|
|
|
|
memcpy (*loc, &entry, sizeof (entry));
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Returns the GOT offset at which the indicated address can be found.
|
|
If there is not yet a GOT entry for this value, create one.
|
|
Returns -1 if no satisfactory GOT offset can be found. */
|
|
|
|
static bfd_vma
|
|
score_elf_local_got_index (bfd *abfd, bfd *ibfd, struct bfd_link_info *info,
|
|
bfd_vma value, unsigned long r_symndx,
|
|
struct score_elf_link_hash_entry *h, int r_type)
|
|
{
|
|
asection *sgot;
|
|
struct score_got_info *g;
|
|
struct score_got_entry *entry;
|
|
|
|
g = score_elf_got_info (elf_hash_table (info)->dynobj, &sgot);
|
|
|
|
entry = score_elf_create_local_got_entry (abfd, ibfd, g, sgot, value,
|
|
r_symndx, h, r_type);
|
|
if (!entry)
|
|
return MINUS_ONE;
|
|
|
|
else
|
|
return entry->gotidx;
|
|
}
|
|
|
|
/* Returns the GOT index for the global symbol indicated by H. */
|
|
|
|
static bfd_vma
|
|
score_elf_global_got_index (bfd *abfd, struct elf_link_hash_entry *h)
|
|
{
|
|
bfd_vma got_index;
|
|
asection *sgot;
|
|
struct score_got_info *g;
|
|
long global_got_dynindx = 0;
|
|
|
|
g = score_elf_got_info (abfd, &sgot);
|
|
if (g->global_gotsym != NULL)
|
|
global_got_dynindx = g->global_gotsym->dynindx;
|
|
|
|
/* Once we determine the global GOT entry with the lowest dynamic
|
|
symbol table index, we must put all dynamic symbols with greater
|
|
indices into the GOT. That makes it easy to calculate the GOT
|
|
offset. */
|
|
BFD_ASSERT (h->dynindx >= global_got_dynindx);
|
|
got_index = ((h->dynindx - global_got_dynindx + g->local_gotno) * SCORE_ELF_GOT_SIZE (abfd));
|
|
BFD_ASSERT (got_index < sgot->size);
|
|
|
|
return got_index;
|
|
}
|
|
|
|
/* Returns the offset for the entry at the INDEXth position in the GOT. */
|
|
|
|
static bfd_vma
|
|
score_elf_got_offset_from_index (bfd *dynobj,
|
|
bfd *output_bfd,
|
|
bfd *input_bfd ATTRIBUTE_UNUSED,
|
|
bfd_vma got_index)
|
|
{
|
|
asection *sgot;
|
|
bfd_vma gp;
|
|
|
|
score_elf_got_info (dynobj, &sgot);
|
|
gp = _bfd_get_gp_value (output_bfd);
|
|
|
|
return sgot->output_section->vma + sgot->output_offset + got_index - gp;
|
|
}
|
|
|
|
/* Follow indirect and warning hash entries so that each got entry
|
|
points to the final symbol definition. P must point to a pointer
|
|
to the hash table we're traversing. Since this traversal may
|
|
modify the hash table, we set this pointer to NULL to indicate
|
|
we've made a potentially-destructive change to the hash table, so
|
|
the traversal must be restarted. */
|
|
|
|
static int
|
|
score_elf_resolve_final_got_entry (void **entryp, void *p)
|
|
{
|
|
struct score_got_entry *entry = (struct score_got_entry *) *entryp;
|
|
htab_t got_entries = *(htab_t *) p;
|
|
|
|
if (entry->abfd != NULL && entry->symndx == -1)
|
|
{
|
|
struct score_elf_link_hash_entry *h = entry->d.h;
|
|
|
|
while (h->root.root.type == bfd_link_hash_indirect
|
|
|| h->root.root.type == bfd_link_hash_warning)
|
|
h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link;
|
|
|
|
if (entry->d.h == h)
|
|
return 1;
|
|
|
|
entry->d.h = h;
|
|
|
|
/* If we can't find this entry with the new bfd hash, re-insert
|
|
it, and get the traversal restarted. */
|
|
if (! htab_find (got_entries, entry))
|
|
{
|
|
htab_clear_slot (got_entries, entryp);
|
|
entryp = htab_find_slot (got_entries, entry, INSERT);
|
|
if (! *entryp)
|
|
*entryp = entry;
|
|
/* Abort the traversal, since the whole table may have
|
|
moved, and leave it up to the parent to restart the
|
|
process. */
|
|
*(htab_t *) p = NULL;
|
|
return 0;
|
|
}
|
|
/* We might want to decrement the global_gotno count, but it's
|
|
either too early or too late for that at this point. */
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Turn indirect got entries in a got_entries table into their final locations. */
|
|
|
|
static void
|
|
score_elf_resolve_final_got_entries (struct score_got_info *g)
|
|
{
|
|
htab_t got_entries;
|
|
|
|
do
|
|
{
|
|
got_entries = g->got_entries;
|
|
|
|
htab_traverse (got_entries,
|
|
score_elf_resolve_final_got_entry,
|
|
&got_entries);
|
|
}
|
|
while (got_entries == NULL);
|
|
}
|
|
|
|
/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. for -r */
|
|
|
|
static void
|
|
score_elf_add_to_rel (bfd *abfd,
|
|
bfd_byte *address,
|
|
reloc_howto_type *howto,
|
|
bfd_signed_vma increment)
|
|
{
|
|
bfd_signed_vma addend;
|
|
bfd_vma contents;
|
|
unsigned long offset;
|
|
unsigned long r_type = howto->type;
|
|
unsigned long hi16_addend, hi16_offset, hi16_value, uvalue;
|
|
|
|
contents = bfd_get_32 (abfd, address);
|
|
/* Get the (signed) value from the instruction. */
|
|
addend = contents & howto->src_mask;
|
|
if (addend & ((howto->src_mask + 1) >> 1))
|
|
{
|
|
bfd_signed_vma mask;
|
|
|
|
mask = -1;
|
|
mask &= ~howto->src_mask;
|
|
addend |= mask;
|
|
}
|
|
/* Add in the increment, (which is a byte value). */
|
|
switch (r_type)
|
|
{
|
|
case R_SCORE_PC19:
|
|
offset =
|
|
(((contents & howto->src_mask) & 0x3ff0000) >> 6) | ((contents & howto->src_mask) & 0x3ff);
|
|
offset += increment;
|
|
contents =
|
|
(contents & ~howto->
|
|
src_mask) | (((offset << 6) & howto->src_mask) & 0x3ff0000) | (offset & 0x3ff);
|
|
bfd_put_32 (abfd, contents, address);
|
|
break;
|
|
case R_SCORE_HI16:
|
|
break;
|
|
case R_SCORE_LO16:
|
|
hi16_addend = bfd_get_32 (abfd, address - 4);
|
|
hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1;
|
|
offset = ((((contents >> 16) & 0x3) << 15) | (contents & 0x7fff)) >> 1;
|
|
offset = (hi16_offset << 16) | (offset & 0xffff);
|
|
uvalue = increment + offset;
|
|
hi16_offset = (uvalue >> 16) << 1;
|
|
hi16_value = (hi16_addend & (~(howto->dst_mask)))
|
|
| (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
|
|
bfd_put_32 (abfd, hi16_value, address - 4);
|
|
offset = (uvalue & 0xffff) << 1;
|
|
contents = (contents & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
|
|
bfd_put_32 (abfd, contents, address);
|
|
break;
|
|
case R_SCORE_24:
|
|
offset =
|
|
(((contents & howto->src_mask) >> 1) & 0x1ff8000) | ((contents & howto->src_mask) & 0x7fff);
|
|
offset += increment;
|
|
contents =
|
|
(contents & ~howto->
|
|
src_mask) | (((offset << 1) & howto->src_mask) & 0x3ff0000) | (offset & 0x7fff);
|
|
bfd_put_32 (abfd, contents, address);
|
|
break;
|
|
case R_SCORE16_11:
|
|
|
|
contents = bfd_get_16 (abfd, address);
|
|
offset = contents & howto->src_mask;
|
|
offset += increment;
|
|
contents = (contents & ~howto->src_mask) | (offset & howto->src_mask);
|
|
bfd_put_16 (abfd, contents, address);
|
|
|
|
break;
|
|
case R_SCORE16_PC8:
|
|
|
|
contents = bfd_get_16 (abfd, address);
|
|
offset = (contents & howto->src_mask) + ((increment >> 1) & 0xff);
|
|
contents = (contents & (~howto->src_mask)) | (offset & howto->src_mask);
|
|
bfd_put_16 (abfd, contents, address);
|
|
|
|
break;
|
|
case R_SCORE_GOT15:
|
|
case R_SCORE_GOT_LO16:
|
|
break;
|
|
|
|
default:
|
|
addend += increment;
|
|
contents = (contents & ~howto->dst_mask) | (addend & howto->dst_mask);
|
|
bfd_put_32 (abfd, contents, address);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Perform a relocation as part of a final link. */
|
|
|
|
static bfd_reloc_status_type
|
|
score_elf_final_link_relocate (reloc_howto_type *howto,
|
|
bfd *input_bfd,
|
|
bfd *output_bfd,
|
|
asection *input_section,
|
|
bfd_byte *contents,
|
|
Elf_Internal_Rela *rel,
|
|
Elf_Internal_Rela *relocs,
|
|
bfd_vma symbol,
|
|
struct bfd_link_info *info,
|
|
const char *sym_name ATTRIBUTE_UNUSED,
|
|
int sym_flags ATTRIBUTE_UNUSED,
|
|
struct score_elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *local_syms,
|
|
asection **local_sections,
|
|
bool gp_disp_p)
|
|
{
|
|
unsigned long r_type;
|
|
unsigned long r_symndx;
|
|
bfd_byte *hit_data = contents + rel->r_offset;
|
|
bfd_vma addend;
|
|
/* The final GP value to be used for the relocatable, executable, or
|
|
shared object file being produced. */
|
|
bfd_vma gp = MINUS_ONE;
|
|
/* The place (section offset or address) of the storage unit being relocated. */
|
|
bfd_vma rel_addr;
|
|
/* The value of GP used to create the relocatable object. */
|
|
bfd_vma gp0 = MINUS_ONE;
|
|
/* The offset into the global offset table at which the address of the relocation entry
|
|
symbol, adjusted by the addend, resides during execution. */
|
|
bfd_vma g = MINUS_ONE;
|
|
/* TRUE if the symbol referred to by this relocation is a local symbol. */
|
|
bool local_p;
|
|
/* The eventual value we will relocate. */
|
|
bfd_vma value = symbol;
|
|
unsigned long hi16_addend, hi16_offset, hi16_value, uvalue, offset, abs_value = 0;
|
|
|
|
Elf_Internal_Sym *sym = 0;
|
|
asection *sec = NULL;
|
|
bool merge_p = 0;
|
|
|
|
|
|
if (elf_gp (output_bfd) == 0)
|
|
{
|
|
struct bfd_link_hash_entry *bh;
|
|
asection *o;
|
|
|
|
bh = bfd_link_hash_lookup (info->hash, "_gp", 0, 0, 1);
|
|
if (bh != NULL && bh->type == bfd_link_hash_defined)
|
|
{
|
|
elf_gp (output_bfd) = (bh->u.def.value
|
|
+ bh->u.def.section->output_offset);
|
|
if (bh->u.def.section->output_section)
|
|
elf_gp (output_bfd) += bh->u.def.section->output_section->vma;
|
|
}
|
|
else if (bfd_link_relocatable (info))
|
|
{
|
|
bfd_vma lo = -1;
|
|
|
|
/* Find the GP-relative section with the lowest offset. */
|
|
for (o = output_bfd->sections; o != NULL; o = o->next)
|
|
if (o->vma < lo)
|
|
lo = o->vma;
|
|
/* And calculate GP relative to that. */
|
|
elf_gp (output_bfd) = lo + ELF_SCORE_GP_OFFSET (input_bfd);
|
|
}
|
|
else
|
|
{
|
|
/* If the relocate_section function needs to do a reloc
|
|
involving the GP value, it should make a reloc_dangerous
|
|
callback to warn that GP is not defined. */
|
|
}
|
|
}
|
|
|
|
/* Parse the relocation. */
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
rel_addr = (input_section->output_section->vma + input_section->output_offset + rel->r_offset);
|
|
|
|
/* For hidden symbol. */
|
|
local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, false);
|
|
if (local_p)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sec = local_sections[r_symndx];
|
|
|
|
symbol = sec->output_section->vma + sec->output_offset;
|
|
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION
|
|
|| (sec->flags & SEC_MERGE))
|
|
symbol += sym->st_value;
|
|
if ((sec->flags & SEC_MERGE)
|
|
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
merge_p = 1;
|
|
}
|
|
|
|
if (r_type == R_SCORE_GOT15)
|
|
{
|
|
const Elf_Internal_Rela *relend;
|
|
const Elf_Internal_Rela *lo16_rel;
|
|
bfd_vma lo_value = 0;
|
|
|
|
relend = relocs + input_section->reloc_count;
|
|
lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend);
|
|
if ((local_p) && (lo16_rel != NULL))
|
|
{
|
|
bfd_vma tmp = 0;
|
|
tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset);
|
|
lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1);
|
|
if (merge_p)
|
|
{
|
|
asection *msec = sec;
|
|
lo_value = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, lo_value);
|
|
lo_value -= symbol;
|
|
lo_value += msec->output_section->vma + msec->output_offset;
|
|
}
|
|
}
|
|
addend = lo_value;
|
|
}
|
|
else
|
|
{
|
|
addend = (bfd_get_32 (input_bfd, hit_data) >> howto->bitpos) & howto->src_mask;
|
|
}
|
|
|
|
/* Figure out the value of the symbol. */
|
|
if (local_p && !merge_p)
|
|
{
|
|
if (r_type == R_SCORE_GOT15)
|
|
{
|
|
const Elf_Internal_Rela *relend;
|
|
const Elf_Internal_Rela *lo16_rel;
|
|
bfd_vma lo_value = 0;
|
|
|
|
value = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
addend = value & 0x7fff;
|
|
if ((addend & 0x4000) == 0x4000)
|
|
addend |= 0xffffc000;
|
|
|
|
relend = relocs + input_section->reloc_count;
|
|
lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend);
|
|
if ((local_p) && (lo16_rel != NULL))
|
|
{
|
|
bfd_vma tmp = 0;
|
|
tmp = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset);
|
|
lo_value = (((tmp >> 16) & 0x3) << 14) | ((tmp & 0x7fff) >> 1);
|
|
}
|
|
|
|
addend <<= 16;
|
|
addend += lo_value;
|
|
}
|
|
}
|
|
|
|
local_p = score_elf_local_relocation_p (input_bfd, rel, local_sections, true);
|
|
|
|
/* If we haven't already determined the GOT offset, or the GP value,
|
|
and we're going to need it, get it now. */
|
|
switch (r_type)
|
|
{
|
|
case R_SCORE_CALL15:
|
|
case R_SCORE_GOT15:
|
|
if (!local_p)
|
|
{
|
|
g = score_elf_global_got_index (elf_hash_table (info)->dynobj,
|
|
(struct elf_link_hash_entry *) h);
|
|
if ((! elf_hash_table(info)->dynamic_sections_created
|
|
|| (bfd_link_pic (info)
|
|
&& (info->symbolic || h->root.dynindx == -1)
|
|
&& h->root.def_regular)))
|
|
{
|
|
/* This is a static link or a -Bsymbolic link. The
|
|
symbol is defined locally, or was forced to be local.
|
|
We must initialize this entry in the GOT. */
|
|
bfd *tmpbfd = elf_hash_table (info)->dynobj;
|
|
asection *sgot = score_elf_got_section (tmpbfd, false);
|
|
bfd_put_32 (tmpbfd, value, sgot->contents + g);
|
|
}
|
|
}
|
|
else if (r_type == R_SCORE_GOT15 || r_type == R_SCORE_CALL15)
|
|
{
|
|
/* There's no need to create a local GOT entry here; the
|
|
calculation for a local GOT15 entry does not involve G. */
|
|
;
|
|
}
|
|
else
|
|
{
|
|
g = score_elf_local_got_index (output_bfd, input_bfd, info,
|
|
symbol + addend, r_symndx, h, r_type);
|
|
if (g == MINUS_ONE)
|
|
return bfd_reloc_outofrange;
|
|
}
|
|
|
|
/* Convert GOT indices to actual offsets. */
|
|
g = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
|
|
output_bfd, input_bfd, g);
|
|
break;
|
|
|
|
case R_SCORE_HI16:
|
|
case R_SCORE_LO16:
|
|
case R_SCORE_GPREL32:
|
|
gp0 = _bfd_get_gp_value (input_bfd);
|
|
gp = _bfd_get_gp_value (output_bfd);
|
|
break;
|
|
|
|
case R_SCORE_GP15:
|
|
gp = _bfd_get_gp_value (output_bfd);
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_SCORE_NONE:
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_ABS32:
|
|
case R_SCORE_REL32:
|
|
if ((bfd_link_pic (info)
|
|
|| (elf_hash_table (info)->dynamic_sections_created
|
|
&& h != NULL
|
|
&& h->root.def_dynamic
|
|
&& !h->root.def_regular))
|
|
&& r_symndx != STN_UNDEF
|
|
&& (input_section->flags & SEC_ALLOC) != 0)
|
|
{
|
|
/* If we're creating a shared library, or this relocation is against a symbol
|
|
in a shared library, then we can't know where the symbol will end up.
|
|
So, we create a relocation record in the output, and leave the job up
|
|
to the dynamic linker. */
|
|
value = addend;
|
|
if (!score_elf_create_dynamic_relocation (output_bfd, info, rel, h,
|
|
symbol, &value,
|
|
input_section))
|
|
return bfd_reloc_undefined;
|
|
}
|
|
else if (r_symndx == STN_UNDEF)
|
|
/* r_symndx will be STN_UNDEF (zero) only for relocs against symbols
|
|
from removed linkonce sections, or sections discarded by
|
|
a linker script. */
|
|
value = 0;
|
|
else
|
|
{
|
|
if (r_type != R_SCORE_REL32)
|
|
value = symbol + addend;
|
|
else
|
|
value = addend;
|
|
}
|
|
value &= howto->dst_mask;
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_ABS16:
|
|
value += addend;
|
|
if ((long) value > 0x7fff || (long) value < -0x8000)
|
|
return bfd_reloc_overflow;
|
|
bfd_put_16 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_24:
|
|
addend = bfd_get_32 (input_bfd, hit_data);
|
|
offset = (((addend & howto->src_mask) >> 1) & 0x1ff8000) | ((addend & howto->src_mask) & 0x7fff);
|
|
if ((offset & 0x1000000) != 0)
|
|
offset |= 0xfe000000;
|
|
value += offset;
|
|
abs_value = value - rel_addr;
|
|
if ((abs_value & 0xfe000000) != 0)
|
|
return bfd_reloc_overflow;
|
|
addend = (addend & ~howto->src_mask)
|
|
| (((value << 1) & howto->src_mask) & 0x3ff0000) | (value & 0x7fff);
|
|
bfd_put_32 (input_bfd, addend, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_PC19:
|
|
addend = bfd_get_32 (input_bfd, hit_data);
|
|
offset = (((addend & howto->src_mask) & 0x3ff0000) >> 6) | ((addend & howto->src_mask) & 0x3ff);
|
|
if ((offset & 0x80000) != 0)
|
|
offset |= 0xfff00000;
|
|
abs_value = value = value - rel_addr + offset;
|
|
/* exceed 20 bit : overflow. */
|
|
if ((abs_value & 0x80000000) == 0x80000000)
|
|
abs_value = 0xffffffff - value + 1;
|
|
if ((abs_value & 0xfff80000) != 0)
|
|
return bfd_reloc_overflow;
|
|
addend = (addend & ~howto->src_mask)
|
|
| (((value << 6) & howto->src_mask) & 0x3ff0000) | (value & 0x3ff);
|
|
bfd_put_32 (input_bfd, addend, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE16_11:
|
|
addend = bfd_get_16 (input_bfd, hit_data);
|
|
offset = addend & howto->src_mask;
|
|
if ((offset & 0x800) != 0) /* Offset is negative. */
|
|
offset |= 0xfffff000;
|
|
value += offset;
|
|
abs_value = value - rel_addr;
|
|
if ((abs_value & 0xfffff000) != 0)
|
|
return bfd_reloc_overflow;
|
|
addend = (addend & ~howto->src_mask) | (value & howto->src_mask);
|
|
bfd_put_16 (input_bfd, addend, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE16_PC8:
|
|
addend = bfd_get_16 (input_bfd, hit_data);
|
|
offset = (addend & howto->src_mask) << 1;
|
|
if ((offset & 0x100) != 0) /* Offset is negative. */
|
|
offset |= 0xfffffe00;
|
|
abs_value = value = value - rel_addr + offset;
|
|
/* Sign bit + exceed 9 bit. */
|
|
if (((value & 0xffffff00) != 0) && ((value & 0xffffff00) != 0xffffff00))
|
|
return bfd_reloc_overflow;
|
|
value >>= 1;
|
|
addend = (addend & ~howto->src_mask) | (value & howto->src_mask);
|
|
bfd_put_16 (input_bfd, addend, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_HI16:
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_LO16:
|
|
hi16_addend = bfd_get_32 (input_bfd, hit_data - 4);
|
|
hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1;
|
|
addend = bfd_get_32 (input_bfd, hit_data);
|
|
offset = ((((addend >> 16) & 0x3) << 15) | (addend & 0x7fff)) >> 1;
|
|
offset = (hi16_offset << 16) | (offset & 0xffff);
|
|
|
|
if (!gp_disp_p)
|
|
uvalue = value + offset;
|
|
else
|
|
uvalue = offset + gp - rel_addr + 4;
|
|
|
|
hi16_offset = (uvalue >> 16) << 1;
|
|
hi16_value = (hi16_addend & (~(howto->dst_mask)))
|
|
| (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
|
|
bfd_put_32 (input_bfd, hi16_value, hit_data - 4);
|
|
offset = (uvalue & 0xffff) << 1;
|
|
value = (addend & (~(howto->dst_mask))) | (offset & 0x7fff) | ((offset << 1) & 0x30000);
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_GP15:
|
|
addend = bfd_get_32 (input_bfd, hit_data);
|
|
offset = addend & 0x7fff;
|
|
if ((offset & 0x4000) == 0x4000)
|
|
offset |= 0xffffc000;
|
|
value = value + offset - gp;
|
|
if (((value & 0xffffc000) != 0) && ((value & 0xffffc000) != 0xffffc000))
|
|
return bfd_reloc_overflow;
|
|
value = (addend & ~howto->src_mask) | (value & howto->src_mask);
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_GOT15:
|
|
case R_SCORE_CALL15:
|
|
if (local_p)
|
|
{
|
|
bool forced;
|
|
|
|
/* The special case is when the symbol is forced to be local. We need the
|
|
full address in the GOT since no R_SCORE_GOT_LO16 relocation follows. */
|
|
forced = ! score_elf_local_relocation_p (input_bfd, rel,
|
|
local_sections, false);
|
|
value = score_elf_got16_entry (output_bfd, input_bfd, info,
|
|
symbol + addend, forced);
|
|
if (value == MINUS_ONE)
|
|
return bfd_reloc_outofrange;
|
|
value = score_elf_got_offset_from_index (elf_hash_table (info)->dynobj,
|
|
output_bfd, input_bfd, value);
|
|
}
|
|
else
|
|
{
|
|
value = g;
|
|
}
|
|
|
|
if ((long) value > 0x3fff || (long) value < -0x4000)
|
|
return bfd_reloc_overflow;
|
|
|
|
addend = bfd_get_32 (input_bfd, hit_data);
|
|
value = (addend & ~howto->dst_mask) | (value & howto->dst_mask);
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_GPREL32:
|
|
value = (addend + symbol + gp0 - gp);
|
|
value &= howto->dst_mask;
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_GOT_LO16:
|
|
addend = bfd_get_32 (input_bfd, hit_data);
|
|
value = (((addend >> 16) & 0x3) << 14) | ((addend & 0x7fff) >> 1);
|
|
value += symbol;
|
|
value = (addend & (~(howto->dst_mask))) | ((value & 0x3fff) << 1)
|
|
| (((value >> 14) & 0x3) << 16);
|
|
|
|
bfd_put_32 (input_bfd, value, hit_data);
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_DUMMY_HI16:
|
|
return bfd_reloc_ok;
|
|
|
|
case R_SCORE_GNU_VTINHERIT:
|
|
case R_SCORE_GNU_VTENTRY:
|
|
/* We don't do anything with these at present. */
|
|
return bfd_reloc_continue;
|
|
|
|
default:
|
|
return bfd_reloc_notsupported;
|
|
}
|
|
}
|
|
|
|
/* Score backend functions. */
|
|
|
|
bool
|
|
s7_bfd_score_info_to_howto (bfd *abfd,
|
|
arelent *bfd_reloc,
|
|
Elf_Internal_Rela *elf_reloc)
|
|
{
|
|
unsigned int r_type;
|
|
|
|
r_type = ELF32_R_TYPE (elf_reloc->r_info);
|
|
if (r_type >= ARRAY_SIZE (elf32_score_howto_table))
|
|
{
|
|
/* xgettext:c-format */
|
|
_bfd_error_handler (_("%pB: unsupported relocation type %#x"),
|
|
abfd, r_type);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return false;
|
|
}
|
|
|
|
bfd_reloc->howto = &elf32_score_howto_table[r_type];
|
|
return true;
|
|
}
|
|
|
|
/* Relocate an score ELF section. */
|
|
|
|
int
|
|
s7_bfd_score_elf_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;
|
|
const char *name;
|
|
unsigned long offset;
|
|
unsigned long hi16_addend, hi16_offset, hi16_value, uvalue;
|
|
size_t extsymoff;
|
|
bool gp_disp_p = false;
|
|
|
|
/* Sort dynsym. */
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
|
{
|
|
bfd_size_type dynsecsymcount = 0;
|
|
if (bfd_link_pic (info))
|
|
{
|
|
asection * p;
|
|
const struct elf_backend_data *bed = get_elf_backend_data (output_bfd);
|
|
|
|
for (p = output_bfd->sections; p ; p = p->next)
|
|
if ((p->flags & SEC_EXCLUDE) == 0
|
|
&& (p->flags & SEC_ALLOC) != 0
|
|
&& !(*bed->elf_backend_omit_section_dynsym) (output_bfd, info, p))
|
|
++ dynsecsymcount;
|
|
}
|
|
|
|
if (!score_elf_sort_hash_table (info, dynsecsymcount + 1))
|
|
return false;
|
|
}
|
|
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
extsymoff = (elf_bad_symtab (input_bfd)) ? 0 : symtab_hdr->sh_info;
|
|
rel = relocs;
|
|
relend = relocs + input_section->reloc_count;
|
|
for (; rel < relend; rel++)
|
|
{
|
|
int r_type;
|
|
reloc_howto_type *howto;
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Sym *sym;
|
|
asection *sec;
|
|
struct score_elf_link_hash_entry *h;
|
|
bfd_vma relocation = 0;
|
|
bfd_reloc_status_type r;
|
|
arelent bfd_reloc;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
|
|
if (! s7_bfd_score_info_to_howto (input_bfd, &bfd_reloc, (Elf_Internal_Rela *) rel))
|
|
continue;
|
|
howto = bfd_reloc.howto;
|
|
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
|
|
if (r_symndx < extsymoff)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
sec = local_sections[r_symndx];
|
|
relocation = sec->output_section->vma + sec->output_offset;
|
|
name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
|
|
|
|
if (!bfd_link_relocatable (info))
|
|
{
|
|
if (ELF_ST_TYPE (sym->st_info) != STT_SECTION
|
|
|| (sec->flags & SEC_MERGE))
|
|
{
|
|
relocation += sym->st_value;
|
|
}
|
|
|
|
if ((sec->flags & SEC_MERGE)
|
|
&& ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
{
|
|
asection *msec;
|
|
bfd_vma addend, value;
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_SCORE_HI16:
|
|
break;
|
|
case R_SCORE_LO16:
|
|
hi16_addend = bfd_get_32 (input_bfd, contents + rel->r_offset - 4);
|
|
hi16_offset = ((((hi16_addend >> 16) & 0x3) << 15) | (hi16_addend & 0x7fff)) >> 1;
|
|
value = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
offset = ((((value >> 16) & 0x3) << 15) | (value & 0x7fff)) >> 1;
|
|
addend = (hi16_offset << 16) | (offset & 0xffff);
|
|
msec = sec;
|
|
addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
|
|
addend -= relocation;
|
|
addend += msec->output_section->vma + msec->output_offset;
|
|
uvalue = addend;
|
|
hi16_offset = (uvalue >> 16) << 1;
|
|
hi16_value = (hi16_addend & (~(howto->dst_mask)))
|
|
| (hi16_offset & 0x7fff) | ((hi16_offset << 1) & 0x30000);
|
|
bfd_put_32 (input_bfd, hi16_value, contents + rel->r_offset - 4);
|
|
offset = (uvalue & 0xffff) << 1;
|
|
value = (value & (~(howto->dst_mask)))
|
|
| (offset & 0x7fff) | ((offset << 1) & 0x30000);
|
|
bfd_put_32 (input_bfd, value, contents + rel->r_offset);
|
|
break;
|
|
case R_SCORE_GOT_LO16:
|
|
value = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
addend = (((value >> 16) & 0x3) << 14) | ((value & 0x7fff) >> 1);
|
|
msec = sec;
|
|
addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation;
|
|
addend += msec->output_section->vma + msec->output_offset;
|
|
value = (value & (~(howto->dst_mask))) | ((addend & 0x3fff) << 1)
|
|
| (((addend >> 14) & 0x3) << 16);
|
|
|
|
bfd_put_32 (input_bfd, value, contents + rel->r_offset);
|
|
break;
|
|
default:
|
|
value = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
/* Get the (signed) value from the instruction. */
|
|
addend = value & howto->src_mask;
|
|
if (addend & ((howto->src_mask + 1) >> 1))
|
|
{
|
|
bfd_signed_vma mask;
|
|
|
|
mask = -1;
|
|
mask &= ~howto->src_mask;
|
|
addend |= mask;
|
|
}
|
|
msec = sec;
|
|
addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) - relocation;
|
|
addend += msec->output_section->vma + msec->output_offset;
|
|
value = (value & ~howto->dst_mask) | (addend & howto->dst_mask);
|
|
bfd_put_32 (input_bfd, value, contents + rel->r_offset);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* For global symbols we look up the symbol in the hash-table. */
|
|
h = ((struct score_elf_link_hash_entry *)
|
|
elf_sym_hashes (input_bfd) [r_symndx - extsymoff]);
|
|
|
|
if (info->wrap_hash != NULL
|
|
&& (input_section->flags & SEC_DEBUGGING) != 0)
|
|
h = ((struct score_elf_link_hash_entry *)
|
|
unwrap_hash_lookup (info, input_bfd, &h->root.root));
|
|
|
|
/* Find the real hash-table entry for this symbol. */
|
|
while (h->root.root.type == bfd_link_hash_indirect
|
|
|| h->root.root.type == bfd_link_hash_warning)
|
|
h = (struct score_elf_link_hash_entry *) h->root.root.u.i.link;
|
|
|
|
/* Record the name of this symbol, for our caller. */
|
|
name = h->root.root.root.string;
|
|
|
|
/* See if this is the special GP_DISP_LABEL symbol. Note that such a
|
|
symbol must always be a global symbol. */
|
|
if (strcmp (name, GP_DISP_LABEL) == 0)
|
|
{
|
|
/* Relocations against GP_DISP_LABEL are permitted only with
|
|
R_SCORE_HI16 and R_SCORE_LO16 relocations. */
|
|
if (r_type != R_SCORE_HI16 && r_type != R_SCORE_LO16)
|
|
return bfd_reloc_notsupported;
|
|
|
|
gp_disp_p = true;
|
|
}
|
|
|
|
/* If this symbol is defined, calculate its address. Note that
|
|
GP_DISP_LABEL is a magic symbol, always implicitly defined by the
|
|
linker, so it's inappropriate to check to see whether or not
|
|
its defined. */
|
|
else if ((h->root.root.type == bfd_link_hash_defined
|
|
|| h->root.root.type == bfd_link_hash_defweak)
|
|
&& h->root.root.u.def.section)
|
|
{
|
|
sec = h->root.root.u.def.section;
|
|
if (sec->output_section)
|
|
relocation = (h->root.root.u.def.value
|
|
+ sec->output_section->vma
|
|
+ sec->output_offset);
|
|
else
|
|
{
|
|
relocation = h->root.root.u.def.value;
|
|
}
|
|
}
|
|
else if (h->root.root.type == bfd_link_hash_undefweak)
|
|
/* We allow relocations against undefined weak symbols, giving
|
|
it the value zero, so that you can undefined weak functions
|
|
and check to see if they exist by looking at their addresses. */
|
|
relocation = 0;
|
|
else if (info->unresolved_syms_in_objects == RM_IGNORE
|
|
&& ELF_ST_VISIBILITY (h->root.other) == STV_DEFAULT)
|
|
relocation = 0;
|
|
else if (strcmp (name, "_DYNAMIC_LINK") == 0)
|
|
{
|
|
/* If this is a dynamic link, we should have created a _DYNAMIC_LINK symbol
|
|
in s7_bfd_score_elf_create_dynamic_sections. Otherwise, we should define
|
|
the symbol with a value of 0. */
|
|
BFD_ASSERT (! bfd_link_pic (info));
|
|
BFD_ASSERT (bfd_get_section_by_name (output_bfd, ".dynamic") == NULL);
|
|
relocation = 0;
|
|
}
|
|
else if (!bfd_link_relocatable (info))
|
|
{
|
|
info->callbacks->undefined_symbol
|
|
(info, h->root.root.root.string, input_bfd, input_section,
|
|
rel->r_offset,
|
|
(info->unresolved_syms_in_objects == RM_DIAGNOSE
|
|
&& !info->warn_unresolved_syms)
|
|
|| ELF_ST_VISIBILITY (h->root.other));
|
|
relocation = 0;
|
|
}
|
|
}
|
|
|
|
if (sec != NULL && discarded_section (sec))
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
|
rel, 1, relend, howto, 0, contents);
|
|
|
|
if (bfd_link_relocatable (info))
|
|
{
|
|
/* This is 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. */
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
sym = local_syms + r_symndx;
|
|
|
|
if (r_type == R_SCORE_GOT15)
|
|
{
|
|
const Elf_Internal_Rela *lo16_rel;
|
|
bfd_vma lo_addend = 0, lo_value = 0;
|
|
bfd_vma addend, value;
|
|
|
|
value = bfd_get_32 (input_bfd, contents + rel->r_offset);
|
|
addend = value & 0x7fff;
|
|
if ((addend & 0x4000) == 0x4000)
|
|
addend |= 0xffffc000;
|
|
|
|
relend = relocs + input_section->reloc_count;
|
|
lo16_rel = score_elf_next_relocation (input_bfd, R_SCORE_GOT_LO16, rel, relend);
|
|
if (lo16_rel != NULL)
|
|
{
|
|
lo_value = bfd_get_32 (input_bfd, contents + lo16_rel->r_offset);
|
|
lo_addend = (((lo_value >> 16) & 0x3) << 14) | ((lo_value & 0x7fff) >> 1);
|
|
}
|
|
|
|
addend <<= 16;
|
|
addend += lo_addend;
|
|
|
|
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
addend += local_sections[r_symndx]->output_offset;
|
|
|
|
lo_addend = addend & 0xffff;
|
|
lo_value = (lo_value & (~(howto->dst_mask))) | ((lo_addend & 0x3fff) << 1)
|
|
| (((lo_addend >> 14) & 0x3) << 16);
|
|
bfd_put_32 (input_bfd, lo_value, contents + lo16_rel->r_offset);
|
|
|
|
addend = addend >> 16;
|
|
value = (value & ~howto->src_mask) | (addend & howto->src_mask);
|
|
bfd_put_32 (input_bfd, value, contents + rel->r_offset);
|
|
}
|
|
else if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
|
{
|
|
sec = local_sections[r_symndx];
|
|
score_elf_add_to_rel (input_bfd, contents + rel->r_offset,
|
|
howto, (bfd_signed_vma) (sec->output_offset + sym->st_value));
|
|
}
|
|
}
|
|
continue;
|
|
}
|
|
|
|
/* This is a final link. */
|
|
r = score_elf_final_link_relocate (howto, input_bfd, output_bfd,
|
|
input_section, contents, rel, relocs,
|
|
relocation, info, name,
|
|
(h ? ELF_ST_TYPE ((unsigned int) h->root.root.type) :
|
|
ELF_ST_TYPE ((unsigned int) sym->st_info)), h, local_syms,
|
|
local_sections, gp_disp_p);
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char *msg = (const char *)0;
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
/* If the overflowing reloc was to an undefined symbol,
|
|
we have already printed one error message and there
|
|
is no point complaining again. */
|
|
if (!h || h->root.root.type != bfd_link_hash_undefined)
|
|
(*info->callbacks->reloc_overflow)
|
|
(info, NULL, name, howto->name, (bfd_vma) 0,
|
|
input_bfd, input_section, rel->r_offset);
|
|
break;
|
|
case bfd_reloc_undefined:
|
|
(*info->callbacks->undefined_symbol)
|
|
(info, name, input_bfd, input_section, rel->r_offset, true);
|
|
break;
|
|
|
|
case bfd_reloc_outofrange:
|
|
msg = _("internal error: out of range error");
|
|
goto common_error;
|
|
|
|
case bfd_reloc_notsupported:
|
|
msg = _("internal error: unsupported relocation error");
|
|
goto common_error;
|
|
|
|
case bfd_reloc_dangerous:
|
|
msg = _("internal error: dangerous error");
|
|
goto common_error;
|
|
|
|
default:
|
|
msg = _("internal error: unknown error");
|
|
/* Fall through. */
|
|
|
|
common_error:
|
|
(*info->callbacks->warning) (info, msg, name, input_bfd,
|
|
input_section, rel->r_offset);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Look through the relocs for a section during the first phase, and
|
|
allocate space in the global offset table. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_check_relocs (bfd *abfd,
|
|
struct bfd_link_info *info,
|
|
asection *sec,
|
|
const Elf_Internal_Rela *relocs)
|
|
{
|
|
bfd *dynobj;
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
struct score_got_info *g;
|
|
size_t extsymoff;
|
|
const Elf_Internal_Rela *rel;
|
|
const Elf_Internal_Rela *rel_end;
|
|
asection *sgot;
|
|
asection *sreloc;
|
|
|
|
if (bfd_link_relocatable (info))
|
|
return true;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
extsymoff = (elf_bad_symtab (abfd)) ? 0 : symtab_hdr->sh_info;
|
|
|
|
if (dynobj == NULL)
|
|
{
|
|
sgot = NULL;
|
|
g = NULL;
|
|
}
|
|
else
|
|
{
|
|
sgot = score_elf_got_section (dynobj, false);
|
|
if (sgot == NULL)
|
|
g = NULL;
|
|
else
|
|
{
|
|
BFD_ASSERT (score_elf_section_data (sgot) != NULL);
|
|
g = score_elf_section_data (sgot)->u.got_info;
|
|
BFD_ASSERT (g != NULL);
|
|
}
|
|
}
|
|
|
|
sreloc = NULL;
|
|
rel_end = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < rel_end; ++rel)
|
|
{
|
|
unsigned long r_symndx;
|
|
unsigned int r_type;
|
|
struct elf_link_hash_entry *h;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
|
|
if (r_symndx < extsymoff)
|
|
{
|
|
h = NULL;
|
|
}
|
|
else if (r_symndx >= extsymoff + NUM_SHDR_ENTRIES (symtab_hdr))
|
|
{
|
|
_bfd_error_handler
|
|
/* xgettext:c-format */
|
|
(_("%pB: malformed reloc detected for section %pA"), abfd, sec);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
h = sym_hashes[r_symndx - extsymoff];
|
|
|
|
/* This may be an indirect symbol created because of a version. */
|
|
if (h != NULL)
|
|
{
|
|
while (h->root.type == bfd_link_hash_indirect)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
}
|
|
|
|
/* Some relocs require a global offset table. */
|
|
if (dynobj == NULL || sgot == NULL)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case R_SCORE_GOT15:
|
|
case R_SCORE_CALL15:
|
|
if (dynobj == NULL)
|
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
|
if (!score_elf_create_got_section (dynobj, info, false))
|
|
return false;
|
|
g = score_elf_got_info (dynobj, &sgot);
|
|
break;
|
|
case R_SCORE_ABS32:
|
|
case R_SCORE_REL32:
|
|
if (dynobj == NULL
|
|
&& (bfd_link_pic (info) || h != NULL)
|
|
&& (sec->flags & SEC_ALLOC) != 0)
|
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!h && (r_type == R_SCORE_GOT_LO16))
|
|
{
|
|
if (! score_elf_record_local_got_symbol (abfd, r_symndx, rel->r_addend, g))
|
|
return false;
|
|
}
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_SCORE_CALL15:
|
|
if (h == NULL)
|
|
{
|
|
_bfd_error_handler
|
|
/* xgettext:c-format */
|
|
(_("%pB: CALL15 reloc at %#" PRIx64 " not against global symbol"),
|
|
abfd, (uint64_t) rel->r_offset);
|
|
bfd_set_error (bfd_error_bad_value);
|
|
return false;
|
|
}
|
|
else
|
|
{
|
|
/* This symbol requires a global offset table entry. */
|
|
if (! score_elf_record_global_got_symbol (h, abfd, info, g))
|
|
return false;
|
|
|
|
/* We need a stub, not a plt entry for the undefined function. But we record
|
|
it as if it needs plt. See _bfd_elf_adjust_dynamic_symbol. */
|
|
h->needs_plt = 1;
|
|
h->type = STT_FUNC;
|
|
}
|
|
break;
|
|
case R_SCORE_GOT15:
|
|
if (h && ! score_elf_record_global_got_symbol (h, abfd, info, g))
|
|
return false;
|
|
break;
|
|
case R_SCORE_ABS32:
|
|
case R_SCORE_REL32:
|
|
if ((bfd_link_pic (info) || h != NULL)
|
|
&& (sec->flags & SEC_ALLOC) != 0)
|
|
{
|
|
if (sreloc == NULL)
|
|
{
|
|
sreloc = score_elf_rel_dyn_section (dynobj, true);
|
|
if (sreloc == NULL)
|
|
return false;
|
|
}
|
|
#define SCORE_READONLY_SECTION (SEC_ALLOC | SEC_LOAD | SEC_READONLY)
|
|
if (bfd_link_pic (info))
|
|
{
|
|
/* When creating a shared object, we must copy these reloc types into
|
|
the output file as R_SCORE_REL32 relocs. We make room for this reloc
|
|
in the .rel.dyn reloc section. */
|
|
score_elf_allocate_dynamic_relocations (dynobj, 1);
|
|
if ((sec->flags & SCORE_READONLY_SECTION)
|
|
== SCORE_READONLY_SECTION)
|
|
/* We tell the dynamic linker that there are
|
|
relocations against the text segment. */
|
|
info->flags |= DF_TEXTREL;
|
|
}
|
|
else
|
|
{
|
|
struct score_elf_link_hash_entry *hscore;
|
|
|
|
/* We only need to copy this reloc if the symbol is
|
|
defined in a dynamic object. */
|
|
hscore = (struct score_elf_link_hash_entry *) h;
|
|
++hscore->possibly_dynamic_relocs;
|
|
if ((sec->flags & SCORE_READONLY_SECTION)
|
|
== SCORE_READONLY_SECTION)
|
|
/* We need it to tell the dynamic linker if there
|
|
are relocations against the text segment. */
|
|
hscore->readonly_reloc = true;
|
|
}
|
|
|
|
/* Even though we don't directly need a GOT entry for this symbol,
|
|
a symbol must have a dynamic symbol table index greater that
|
|
DT_SCORE_GOTSYM if there are dynamic relocations against it. */
|
|
if (h != NULL)
|
|
{
|
|
if (dynobj == NULL)
|
|
elf_hash_table (info)->dynobj = dynobj = abfd;
|
|
if (! score_elf_create_got_section (dynobj, info, true))
|
|
return false;
|
|
g = score_elf_got_info (dynobj, &sgot);
|
|
if (! score_elf_record_global_got_symbol (h, abfd, info, g))
|
|
return false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
|
Reconstruct it for later use during GC. */
|
|
case R_SCORE_GNU_VTINHERIT:
|
|
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
|
return false;
|
|
break;
|
|
|
|
/* This relocation describes which C++ vtable entries are actually
|
|
used. Record for later use during GC. */
|
|
case R_SCORE_GNU_VTENTRY:
|
|
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
|
|
return false;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* We must not create a stub for a symbol that has relocations
|
|
related to taking the function's address. */
|
|
switch (r_type)
|
|
{
|
|
default:
|
|
if (h != NULL)
|
|
{
|
|
struct score_elf_link_hash_entry *sh;
|
|
|
|
sh = (struct score_elf_link_hash_entry *) h;
|
|
sh->no_fn_stub = true;
|
|
}
|
|
break;
|
|
case R_SCORE_CALL15:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
s7_bfd_score_elf_add_symbol_hook (bfd *abfd,
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
Elf_Internal_Sym *sym,
|
|
const char **namep ATTRIBUTE_UNUSED,
|
|
flagword *flagsp ATTRIBUTE_UNUSED,
|
|
asection **secp,
|
|
bfd_vma *valp)
|
|
{
|
|
switch (sym->st_shndx)
|
|
{
|
|
case SHN_COMMON:
|
|
if (sym->st_size > elf_gp_size (abfd))
|
|
break;
|
|
/* Fall through. */
|
|
case SHN_SCORE_SCOMMON:
|
|
*secp = bfd_make_section_old_way (abfd, ".scommon");
|
|
(*secp)->flags |= SEC_IS_COMMON | SEC_SMALL_DATA;
|
|
*valp = sym->st_size;
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
s7_bfd_score_elf_symbol_processing (bfd *abfd, asymbol *asym)
|
|
{
|
|
elf_symbol_type *elfsym;
|
|
|
|
elfsym = (elf_symbol_type *) asym;
|
|
switch (elfsym->internal_elf_sym.st_shndx)
|
|
{
|
|
case SHN_COMMON:
|
|
if (asym->value > elf_gp_size (abfd))
|
|
break;
|
|
/* Fall through. */
|
|
case SHN_SCORE_SCOMMON:
|
|
asym->section = &score_elf_scom_section;
|
|
asym->value = elfsym->internal_elf_sym.st_size;
|
|
break;
|
|
}
|
|
}
|
|
|
|
int
|
|
s7_bfd_score_elf_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
const char *name ATTRIBUTE_UNUSED,
|
|
Elf_Internal_Sym *sym,
|
|
asection *input_sec,
|
|
struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
|
|
{
|
|
/* If we see a common symbol, which implies a relocatable link, then
|
|
if a symbol was small common in an input file, mark it as small
|
|
common in the output file. */
|
|
if (sym->st_shndx == SHN_COMMON && strcmp (input_sec->name, ".scommon") == 0)
|
|
sym->st_shndx = SHN_SCORE_SCOMMON;
|
|
|
|
return 1;
|
|
}
|
|
|
|
bool
|
|
s7_bfd_score_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
|
|
asection *sec,
|
|
int *retval)
|
|
{
|
|
if (strcmp (bfd_section_name (sec), ".scommon") == 0)
|
|
{
|
|
*retval = SHN_SCORE_SCOMMON;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *h)
|
|
{
|
|
bfd *dynobj;
|
|
struct score_elf_link_hash_entry *hscore;
|
|
asection *s;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
|
/* Make sure we know what is going on here. */
|
|
BFD_ASSERT (dynobj != NULL
|
|
&& (h->needs_plt
|
|
|| h->is_weakalias
|
|
|| (h->def_dynamic && h->ref_regular && !h->def_regular)));
|
|
|
|
/* If this symbol is defined in a dynamic object, we need to copy
|
|
any R_SCORE_ABS32 or R_SCORE_REL32 relocs against it into the output
|
|
file. */
|
|
hscore = (struct score_elf_link_hash_entry *) h;
|
|
if (!bfd_link_relocatable (info)
|
|
&& hscore->possibly_dynamic_relocs != 0
|
|
&& (h->root.type == bfd_link_hash_defweak || !h->def_regular))
|
|
{
|
|
score_elf_allocate_dynamic_relocations (dynobj, hscore->possibly_dynamic_relocs);
|
|
if (hscore->readonly_reloc)
|
|
/* We tell the dynamic linker that there are relocations
|
|
against the text segment. */
|
|
info->flags |= DF_TEXTREL;
|
|
}
|
|
|
|
/* For a function, create a stub, if allowed. */
|
|
if (!hscore->no_fn_stub && h->needs_plt)
|
|
{
|
|
if (!elf_hash_table (info)->dynamic_sections_created)
|
|
return true;
|
|
|
|
/* If this symbol is not defined in a regular file, then set
|
|
the symbol to the stub location. This is required to make
|
|
function pointers compare as equal between the normal
|
|
executable and the shared library. */
|
|
if (!h->def_regular)
|
|
{
|
|
/* We need .stub section. */
|
|
s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME);
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
h->root.u.def.section = s;
|
|
h->root.u.def.value = s->size;
|
|
|
|
/* XXX Write this stub address somewhere. */
|
|
h->plt.offset = s->size;
|
|
|
|
/* Make room for this stub code. */
|
|
s->size += SCORE_FUNCTION_STUB_SIZE;
|
|
|
|
/* The last half word of the stub will be filled with the index
|
|
of this symbol in .dynsym section. */
|
|
return true;
|
|
}
|
|
}
|
|
else if ((h->type == STT_FUNC) && !h->needs_plt)
|
|
{
|
|
/* This will set the entry for this symbol in the GOT to 0, and
|
|
the dynamic linker will take care of this. */
|
|
h->root.u.def.value = 0;
|
|
return true;
|
|
}
|
|
|
|
/* 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. */
|
|
return true;
|
|
}
|
|
|
|
/* This function is called after all the input files have been read,
|
|
and the input sections have been assigned to output sections. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_always_size_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
bfd *dynobj;
|
|
asection *s;
|
|
struct score_got_info *g;
|
|
int i;
|
|
bfd_size_type loadable_size = 0;
|
|
bfd_size_type local_gotno;
|
|
bfd *sub;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
if (dynobj == NULL)
|
|
/* Relocatable links don't have it. */
|
|
return true;
|
|
|
|
g = score_elf_got_info (dynobj, &s);
|
|
if (s == NULL)
|
|
return true;
|
|
|
|
/* Calculate the total loadable size of the output. That will give us the
|
|
maximum number of GOT_PAGE entries required. */
|
|
for (sub = info->input_bfds; sub; sub = sub->link.next)
|
|
{
|
|
asection *subsection;
|
|
|
|
for (subsection = sub->sections;
|
|
subsection;
|
|
subsection = subsection->next)
|
|
{
|
|
if ((subsection->flags & SEC_ALLOC) == 0)
|
|
continue;
|
|
loadable_size += ((subsection->size + 0xf)
|
|
&~ (bfd_size_type) 0xf);
|
|
}
|
|
}
|
|
|
|
/* There has to be a global GOT entry for every symbol with
|
|
a dynamic symbol table index of DT_SCORE_GOTSYM or
|
|
higher. Therefore, it make sense to put those symbols
|
|
that need GOT entries at the end of the symbol table. We
|
|
do that here. */
|
|
if (! score_elf_sort_hash_table (info, 1))
|
|
return false;
|
|
|
|
if (g->global_gotsym != NULL)
|
|
i = elf_hash_table (info)->dynsymcount - g->global_gotsym->dynindx;
|
|
else
|
|
/* If there are no global symbols, or none requiring
|
|
relocations, then GLOBAL_GOTSYM will be NULL. */
|
|
i = 0;
|
|
|
|
/* In the worst case, we'll get one stub per dynamic symbol. */
|
|
loadable_size += SCORE_FUNCTION_STUB_SIZE * i;
|
|
|
|
/* Assume there are two loadable segments consisting of
|
|
contiguous sections. Is 5 enough? */
|
|
local_gotno = (loadable_size >> 16) + 5;
|
|
|
|
g->local_gotno += local_gotno;
|
|
s->size += g->local_gotno * SCORE_ELF_GOT_SIZE (output_bfd);
|
|
|
|
g->global_gotno = i;
|
|
s->size += i * SCORE_ELF_GOT_SIZE (output_bfd);
|
|
|
|
score_elf_resolve_final_got_entries (g);
|
|
|
|
if (s->size > SCORE_ELF_GOT_MAX_SIZE (output_bfd))
|
|
{
|
|
/* Fixme. Error message or Warning message should be issued here. */
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Set the sizes of the dynamic sections. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
|
|
{
|
|
bfd *dynobj;
|
|
asection *s;
|
|
bool reltext;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
BFD_ASSERT (dynobj != NULL);
|
|
|
|
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 = strlen (ELF_DYNAMIC_INTERPRETER) + 1;
|
|
s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
|
|
}
|
|
}
|
|
|
|
/* The check_relocs and adjust_dynamic_symbol entry points have
|
|
determined the sizes of the various dynamic sections. Allocate
|
|
memory for them. */
|
|
reltext = false;
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
|
{
|
|
const char *name;
|
|
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
|
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, ".rel"))
|
|
{
|
|
if (s->size == 0)
|
|
{
|
|
/* We only strip the section if the output section name
|
|
has the same name. Otherwise, there might be several
|
|
input sections for this output section. FIXME: This
|
|
code is probably not needed these days anyhow, since
|
|
the linker now does not create empty output sections. */
|
|
if (s->output_section != NULL
|
|
&& strcmp (name,
|
|
bfd_section_name (s->output_section)) == 0)
|
|
s->flags |= SEC_EXCLUDE;
|
|
}
|
|
else
|
|
{
|
|
const char *outname;
|
|
asection *target;
|
|
|
|
/* If this relocation section applies to a read only
|
|
section, then we probably need a DT_TEXTREL entry.
|
|
If the relocation section is .rel.dyn, we always
|
|
assert a DT_TEXTREL entry rather than testing whether
|
|
there exists a relocation to a read only section or
|
|
not. */
|
|
outname = bfd_section_name (s->output_section);
|
|
target = bfd_get_section_by_name (output_bfd, outname + 4);
|
|
if ((target != NULL
|
|
&& (target->flags & SEC_READONLY) != 0
|
|
&& (target->flags & SEC_ALLOC) != 0) || strcmp (outname, ".rel.dyn") == 0)
|
|
reltext = true;
|
|
|
|
/* We use the reloc_count field as a counter if we need
|
|
to copy relocs into the output file. */
|
|
if (strcmp (name, ".rel.dyn") != 0)
|
|
s->reloc_count = 0;
|
|
}
|
|
}
|
|
else if (startswith (name, ".got"))
|
|
{
|
|
/* s7_bfd_score_elf_always_size_sections() has already done
|
|
most of the work, but some symbols may have been mapped
|
|
to versions that we must now resolve in the got_entries
|
|
hash tables. */
|
|
}
|
|
else if (strcmp (name, SCORE_ELF_STUB_SECTION_NAME) == 0)
|
|
{
|
|
/* IRIX rld assumes that the function stub isn't at the end
|
|
of .text section. So put a dummy. XXX */
|
|
s->size += SCORE_FUNCTION_STUB_SIZE;
|
|
}
|
|
else if (! startswith (name, ".init"))
|
|
{
|
|
/* It's not one of our sections, so don't allocate space. */
|
|
continue;
|
|
}
|
|
|
|
/* Allocate memory for the section contents. */
|
|
s->contents = bfd_zalloc (dynobj, s->size);
|
|
if (s->contents == NULL && s->size != 0)
|
|
{
|
|
bfd_set_error (bfd_error_no_memory);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
|
{
|
|
/* Add some entries to the .dynamic section. We fill in the
|
|
values later, in s7_bfd_score_elf_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. */
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_DEBUG, 0))
|
|
return false;
|
|
|
|
if (reltext)
|
|
info->flags |= DF_TEXTREL;
|
|
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
|
{
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_TEXTREL, 0))
|
|
return false;
|
|
}
|
|
|
|
if (! SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_PLTGOT, 0))
|
|
return false;
|
|
|
|
if (score_elf_rel_dyn_section (dynobj, false))
|
|
{
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_REL, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELSZ, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_RELENT, 0))
|
|
return false;
|
|
}
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_BASE_ADDRESS, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_LOCAL_GOTNO, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_SYMTABNO, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_UNREFEXTNO, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_GOTSYM, 0))
|
|
return false;
|
|
|
|
if (!SCORE_ELF_ADD_DYNAMIC_ENTRY (info, DT_SCORE_HIPAGENO, 0))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
s7_bfd_score_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
struct bfd_link_hash_entry *bh;
|
|
flagword flags;
|
|
asection *s;
|
|
|
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
|
| SEC_LINKER_CREATED | SEC_READONLY);
|
|
|
|
/* ABI requests the .dynamic section to be read only. */
|
|
s = bfd_get_linker_section (abfd, ".dynamic");
|
|
if (s != NULL)
|
|
{
|
|
if (!bfd_set_section_flags (s, flags))
|
|
return false;
|
|
}
|
|
|
|
/* We need to create .got section. */
|
|
if (!score_elf_create_got_section (abfd, info, false))
|
|
return false;
|
|
|
|
if (!score_elf_rel_dyn_section (elf_hash_table (info)->dynobj, true))
|
|
return false;
|
|
|
|
/* Create .stub section. */
|
|
if (bfd_get_linker_section (abfd, SCORE_ELF_STUB_SECTION_NAME) == NULL)
|
|
{
|
|
s = bfd_make_section_anyway_with_flags (abfd, SCORE_ELF_STUB_SECTION_NAME,
|
|
flags | SEC_CODE);
|
|
if (s == NULL
|
|
|| !bfd_set_section_alignment (s, 2))
|
|
|
|
return false;
|
|
}
|
|
|
|
if (!bfd_link_pic (info))
|
|
{
|
|
const char *name;
|
|
|
|
name = "_DYNAMIC_LINK";
|
|
bh = NULL;
|
|
if (!(_bfd_generic_link_add_one_symbol
|
|
(info, abfd, name, BSF_GLOBAL, bfd_abs_section_ptr,
|
|
(bfd_vma) 0, NULL, false, get_elf_backend_data (abfd)->collect, &bh)))
|
|
return false;
|
|
|
|
h = (struct elf_link_hash_entry *) bh;
|
|
h->non_elf = 0;
|
|
h->def_regular = 1;
|
|
h->type = STT_SECTION;
|
|
|
|
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
|
dynamic sections here. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_finish_dynamic_symbol (bfd *output_bfd,
|
|
struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
bfd *dynobj;
|
|
asection *sgot;
|
|
struct score_got_info *g;
|
|
const char *name;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
|
if (h->plt.offset != MINUS_ONE)
|
|
{
|
|
asection *s;
|
|
bfd_byte stub[SCORE_FUNCTION_STUB_SIZE];
|
|
|
|
/* This symbol has a stub. Set it up. */
|
|
BFD_ASSERT (h->dynindx != -1);
|
|
|
|
s = bfd_get_linker_section (dynobj, SCORE_ELF_STUB_SECTION_NAME);
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
/* FIXME: Can h->dynindex be more than 64K? */
|
|
if (h->dynindx & 0xffff0000)
|
|
return false;
|
|
|
|
/* Fill the stub. */
|
|
bfd_put_32 (output_bfd, STUB_LW, stub);
|
|
bfd_put_32 (output_bfd, STUB_MOVE, stub + 4);
|
|
bfd_put_32 (output_bfd, STUB_LI16 | (h->dynindx << 1), stub + 8);
|
|
bfd_put_32 (output_bfd, STUB_BRL, stub + 12);
|
|
|
|
BFD_ASSERT (h->plt.offset <= s->size);
|
|
memcpy (s->contents + h->plt.offset, stub, SCORE_FUNCTION_STUB_SIZE);
|
|
|
|
/* Mark the symbol as undefined. plt.offset != -1 occurs
|
|
only for the referenced symbol. */
|
|
sym->st_shndx = SHN_UNDEF;
|
|
|
|
/* The run-time linker uses the st_value field of the symbol
|
|
to reset the global offset table entry for this external
|
|
to its stub address when unlinking a shared object. */
|
|
sym->st_value = (s->output_section->vma + s->output_offset + h->plt.offset);
|
|
}
|
|
|
|
BFD_ASSERT (h->dynindx != -1 || h->forced_local);
|
|
|
|
sgot = score_elf_got_section (dynobj, false);
|
|
BFD_ASSERT (sgot != NULL);
|
|
BFD_ASSERT (score_elf_section_data (sgot) != NULL);
|
|
g = score_elf_section_data (sgot)->u.got_info;
|
|
BFD_ASSERT (g != NULL);
|
|
|
|
/* Run through the global symbol table, creating GOT entries for all
|
|
the symbols that need them. */
|
|
if (g->global_gotsym != NULL && h->dynindx >= g->global_gotsym->dynindx)
|
|
{
|
|
bfd_vma offset;
|
|
bfd_vma value;
|
|
|
|
value = sym->st_value;
|
|
offset = score_elf_global_got_index (dynobj, h);
|
|
bfd_put_32 (output_bfd, value, sgot->contents + offset);
|
|
}
|
|
|
|
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
|
name = h->root.root.string;
|
|
if (h == elf_hash_table (info)->hdynamic
|
|
|| h == elf_hash_table (info)->hgot)
|
|
sym->st_shndx = SHN_ABS;
|
|
else if (strcmp (name, "_DYNAMIC_LINK") == 0)
|
|
{
|
|
sym->st_shndx = SHN_ABS;
|
|
sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
|
|
sym->st_value = 1;
|
|
}
|
|
else if (strcmp (name, GP_DISP_LABEL) == 0)
|
|
{
|
|
sym->st_shndx = SHN_ABS;
|
|
sym->st_info = ELF_ST_INFO (STB_GLOBAL, STT_SECTION);
|
|
sym->st_value = elf_gp (output_bfd);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Finish up the dynamic sections. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_finish_dynamic_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
bfd *dynobj;
|
|
asection *sdyn;
|
|
asection *sgot;
|
|
asection *s;
|
|
struct score_got_info *g;
|
|
|
|
dynobj = elf_hash_table (info)->dynobj;
|
|
|
|
sdyn = bfd_get_linker_section (dynobj, ".dynamic");
|
|
|
|
sgot = score_elf_got_section (dynobj, false);
|
|
if (sgot == NULL)
|
|
g = NULL;
|
|
else
|
|
{
|
|
BFD_ASSERT (score_elf_section_data (sgot) != NULL);
|
|
g = score_elf_section_data (sgot)->u.got_info;
|
|
BFD_ASSERT (g != NULL);
|
|
}
|
|
|
|
if (elf_hash_table (info)->dynamic_sections_created)
|
|
{
|
|
bfd_byte *b;
|
|
|
|
BFD_ASSERT (sdyn != NULL);
|
|
BFD_ASSERT (g != NULL);
|
|
|
|
for (b = sdyn->contents;
|
|
b < sdyn->contents + sdyn->size;
|
|
b += SCORE_ELF_DYN_SIZE (dynobj))
|
|
{
|
|
Elf_Internal_Dyn dyn;
|
|
const char *name;
|
|
size_t elemsize;
|
|
bool swap_out_p;
|
|
|
|
/* Read in the current dynamic entry. */
|
|
(*get_elf_backend_data (dynobj)->s->swap_dyn_in) (dynobj, b, &dyn);
|
|
|
|
/* Assume that we're going to modify it and write it out. */
|
|
swap_out_p = true;
|
|
|
|
switch (dyn.d_tag)
|
|
{
|
|
case DT_RELENT:
|
|
dyn.d_un.d_val = SCORE_ELF_REL_SIZE (dynobj);
|
|
break;
|
|
|
|
case DT_STRSZ:
|
|
/* Rewrite DT_STRSZ. */
|
|
dyn.d_un.d_val
|
|
= _bfd_elf_strtab_size (elf_hash_table (info)->dynstr);
|
|
break;
|
|
|
|
case DT_PLTGOT:
|
|
s = elf_hash_table (info)->sgot;
|
|
dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
|
|
break;
|
|
|
|
case DT_SCORE_BASE_ADDRESS:
|
|
s = output_bfd->sections;
|
|
BFD_ASSERT (s != NULL);
|
|
dyn.d_un.d_ptr = s->vma & ~(bfd_vma) 0xffff;
|
|
break;
|
|
|
|
case DT_SCORE_LOCAL_GOTNO:
|
|
dyn.d_un.d_val = g->local_gotno;
|
|
break;
|
|
|
|
case DT_SCORE_UNREFEXTNO:
|
|
/* The index into the dynamic symbol table which is the
|
|
entry of the first external symbol that is not
|
|
referenced within the same object. */
|
|
dyn.d_un.d_val = bfd_count_sections (output_bfd) + 1;
|
|
break;
|
|
|
|
case DT_SCORE_GOTSYM:
|
|
if (g->global_gotsym)
|
|
{
|
|
dyn.d_un.d_val = g->global_gotsym->dynindx;
|
|
break;
|
|
}
|
|
/* In case if we don't have global got symbols we default
|
|
to setting DT_SCORE_GOTSYM to the same value as
|
|
DT_SCORE_SYMTABNO. */
|
|
/* Fall through. */
|
|
|
|
case DT_SCORE_SYMTABNO:
|
|
name = ".dynsym";
|
|
elemsize = SCORE_ELF_SYM_SIZE (output_bfd);
|
|
s = bfd_get_linker_section (dynobj, name);
|
|
dyn.d_un.d_val = s->size / elemsize;
|
|
break;
|
|
|
|
case DT_SCORE_HIPAGENO:
|
|
dyn.d_un.d_val = g->local_gotno - SCORE_RESERVED_GOTNO;
|
|
break;
|
|
|
|
default:
|
|
swap_out_p = false;
|
|
break;
|
|
}
|
|
|
|
if (swap_out_p)
|
|
(*get_elf_backend_data (dynobj)->s->swap_dyn_out) (dynobj, &dyn, b);
|
|
}
|
|
}
|
|
|
|
/* The first entry of the global offset table will be filled at
|
|
runtime. The second entry will be used by some runtime loaders.
|
|
This isn't the case of IRIX rld. */
|
|
if (sgot != NULL && sgot->size > 0)
|
|
{
|
|
bfd_put_32 (output_bfd, 0, sgot->contents);
|
|
bfd_put_32 (output_bfd, 0x80000000, sgot->contents + SCORE_ELF_GOT_SIZE (output_bfd));
|
|
}
|
|
|
|
if (sgot != NULL)
|
|
elf_section_data (sgot->output_section)->this_hdr.sh_entsize
|
|
= SCORE_ELF_GOT_SIZE (output_bfd);
|
|
|
|
|
|
/* We need to sort the entries of the dynamic relocation section. */
|
|
s = score_elf_rel_dyn_section (dynobj, false);
|
|
|
|
if (s != NULL && s->size > (bfd_vma)2 * SCORE_ELF_REL_SIZE (output_bfd))
|
|
{
|
|
reldyn_sorting_bfd = output_bfd;
|
|
qsort ((Elf32_External_Rel *) s->contents + 1, s->reloc_count - 1,
|
|
sizeof (Elf32_External_Rel), score_elf_sort_dynamic_relocs);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/* This function set up the ELF section header for a BFD section in preparation for writing
|
|
it out. This is where the flags and type fields are set for unusual sections. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
|
|
Elf_Internal_Shdr *hdr,
|
|
asection *sec)
|
|
{
|
|
const char *name;
|
|
|
|
name = bfd_section_name (sec);
|
|
|
|
if (strcmp (name, ".got") == 0
|
|
|| strcmp (name, ".srdata") == 0
|
|
|| strcmp (name, ".sdata") == 0
|
|
|| strcmp (name, ".sbss") == 0)
|
|
hdr->sh_flags |= SHF_SCORE_GPREL;
|
|
|
|
return true;
|
|
}
|
|
|
|
/* This function do additional processing on the ELF section header before writing
|
|
it out. This is used to set the flags and type fields for some sections. */
|
|
|
|
/* assign_file_positions_except_relocs() check section flag and if it is allocatable,
|
|
warning message will be issued. backend_fake_section is called before
|
|
assign_file_positions_except_relocs(); backend_section_processing after it. so, we
|
|
modify section flag there, but not backend_fake_section. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_section_processing (bfd *abfd ATTRIBUTE_UNUSED, Elf_Internal_Shdr *hdr)
|
|
{
|
|
if (hdr->bfd_section != NULL)
|
|
{
|
|
const char *name = bfd_section_name (hdr->bfd_section);
|
|
|
|
if (strcmp (name, ".sdata") == 0)
|
|
{
|
|
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL;
|
|
hdr->sh_type = SHT_PROGBITS;
|
|
}
|
|
else if (strcmp (name, ".sbss") == 0)
|
|
{
|
|
hdr->sh_flags |= SHF_ALLOC | SHF_WRITE | SHF_SCORE_GPREL;
|
|
hdr->sh_type = SHT_NOBITS;
|
|
}
|
|
else if (strcmp (name, ".srdata") == 0)
|
|
{
|
|
hdr->sh_flags |= SHF_ALLOC | SHF_SCORE_GPREL;
|
|
hdr->sh_type = SHT_PROGBITS;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
s7_bfd_score_elf_write_section (bfd *output_bfd, asection *sec, bfd_byte *contents)
|
|
{
|
|
bfd_byte *to, *from, *end;
|
|
int i;
|
|
|
|
if (strcmp (sec->name, ".pdr") != 0)
|
|
return false;
|
|
|
|
if (score_elf_section_data (sec)->u.tdata == NULL)
|
|
return false;
|
|
|
|
to = contents;
|
|
end = contents + sec->size;
|
|
for (from = contents, i = 0; from < end; from += PDR_SIZE, i++)
|
|
{
|
|
if ((score_elf_section_data (sec)->u.tdata)[i] == 1)
|
|
continue;
|
|
|
|
if (to != from)
|
|
memcpy (to, from, PDR_SIZE);
|
|
|
|
to += PDR_SIZE;
|
|
}
|
|
bfd_set_section_contents (output_bfd, sec->output_section, contents,
|
|
(file_ptr) sec->output_offset, sec->size);
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Copy data from a SCORE ELF indirect symbol to its direct symbol, hiding the old
|
|
indirect symbol. Process additional relocation information. */
|
|
|
|
void
|
|
s7_bfd_score_elf_copy_indirect_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *dir,
|
|
struct elf_link_hash_entry *ind)
|
|
{
|
|
struct score_elf_link_hash_entry *dirscore, *indscore;
|
|
|
|
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
|
|
|
if (ind->root.type != bfd_link_hash_indirect)
|
|
return;
|
|
|
|
dirscore = (struct score_elf_link_hash_entry *) dir;
|
|
indscore = (struct score_elf_link_hash_entry *) ind;
|
|
dirscore->possibly_dynamic_relocs += indscore->possibly_dynamic_relocs;
|
|
|
|
if (indscore->readonly_reloc)
|
|
dirscore->readonly_reloc = true;
|
|
|
|
if (indscore->no_fn_stub)
|
|
dirscore->no_fn_stub = true;
|
|
}
|
|
|
|
/* Remove information about discarded functions from other sections which mention them. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_discard_info (bfd *abfd,
|
|
struct elf_reloc_cookie *cookie,
|
|
struct bfd_link_info *info)
|
|
{
|
|
asection *o;
|
|
bool ret = false;
|
|
unsigned char *tdata;
|
|
size_t i, skip;
|
|
|
|
o = bfd_get_section_by_name (abfd, ".pdr");
|
|
if ((!o) || (o->size == 0) || (o->size % PDR_SIZE != 0)
|
|
|| (o->output_section != NULL && bfd_is_abs_section (o->output_section)))
|
|
return false;
|
|
|
|
tdata = bfd_zmalloc (o->size / PDR_SIZE);
|
|
if (!tdata)
|
|
return false;
|
|
|
|
cookie->rels = _bfd_elf_link_read_relocs (abfd, o, NULL, NULL, info->keep_memory);
|
|
if (!cookie->rels)
|
|
{
|
|
free (tdata);
|
|
return false;
|
|
}
|
|
|
|
cookie->rel = cookie->rels;
|
|
cookie->relend = cookie->rels + o->reloc_count;
|
|
|
|
for (i = 0, skip = 0; i < o->size; i++)
|
|
{
|
|
if (bfd_elf_reloc_symbol_deleted_p (i * PDR_SIZE, cookie))
|
|
{
|
|
tdata[i] = 1;
|
|
skip++;
|
|
}
|
|
}
|
|
|
|
if (skip != 0)
|
|
{
|
|
score_elf_section_data (o)->u.tdata = tdata;
|
|
o->size -= skip * PDR_SIZE;
|
|
ret = true;
|
|
}
|
|
else
|
|
free (tdata);
|
|
|
|
if (!info->keep_memory)
|
|
free (cookie->rels);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Signal that discard_info() has removed the discarded relocations for this section. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_ignore_discarded_relocs (asection *sec)
|
|
{
|
|
if (strcmp (sec->name, ".pdr") == 0)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/* Return the section that should be marked against GC for a given
|
|
relocation. */
|
|
|
|
asection *
|
|
s7_bfd_score_elf_gc_mark_hook (asection *sec,
|
|
struct bfd_link_info *info,
|
|
Elf_Internal_Rela *rel,
|
|
struct elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
if (h != NULL)
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
|
{
|
|
case R_SCORE_GNU_VTINHERIT:
|
|
case R_SCORE_GNU_VTENTRY:
|
|
return NULL;
|
|
}
|
|
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
|
}
|
|
|
|
/* Support for core dump NOTE sections. */
|
|
|
|
bool
|
|
s7_bfd_score_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
|
|
{
|
|
int offset;
|
|
unsigned int raw_size;
|
|
|
|
switch (note->descsz)
|
|
{
|
|
default:
|
|
return false;
|
|
case 272: /* Linux/Score elf_prstatus */
|
|
|
|
/* pr_cursig */
|
|
elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
|
|
|
|
/* pr_pid */
|
|
elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
|
|
|
|
/* pr_reg */
|
|
offset = 72;
|
|
|
|
/* sizeof(elf_gregset_t) */
|
|
raw_size = 196;
|
|
|
|
break;
|
|
}
|
|
|
|
/* Make a ".reg/999" section. */
|
|
return _bfd_elfcore_make_pseudosection (abfd, ".reg", raw_size,
|
|
note->descpos + offset);
|
|
}
|
|
|
|
bool
|
|
s7_bfd_score_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
|
|
{
|
|
switch (note->descsz)
|
|
{
|
|
default:
|
|
return false;
|
|
|
|
case 128: /* Linux/Score elf_prpsinfo. */
|
|
/* pr_fname */
|
|
elf_tdata (abfd)->core->program
|
|
= _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
|
|
|
|
/* pr_psargs */
|
|
elf_tdata (abfd)->core->command
|
|
= _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
|
|
break;
|
|
}
|
|
|
|
/* Note that for some reason, a spurious space is tacked
|
|
onto the end of the args in some (at least one anyway)
|
|
implementations, so strip it off if it exists. */
|
|
|
|
{
|
|
char *command = elf_tdata (abfd)->core->command;
|
|
int n = strlen (command);
|
|
|
|
if (0 < n && command[n - 1] == ' ')
|
|
command[n - 1] = '\0';
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/* Score BFD functions. */
|
|
|
|
reloc_howto_type *
|
|
s7_elf32_score_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE (elf32_score_reloc_map); i++)
|
|
if (elf32_score_reloc_map[i].bfd_reloc_val == code)
|
|
return &elf32_score_howto_table[elf32_score_reloc_map[i].elf_reloc_val];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
bool
|
|
s7_elf32_score_print_private_bfd_data (bfd *abfd, void * ptr)
|
|
{
|
|
FILE *file = (FILE *) ptr;
|
|
|
|
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
|
|
|
/* Print normal ELF private data. */
|
|
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
|
|
|
/* xgettext:c-format */
|
|
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
|
if (elf_elfheader (abfd)->e_flags & EF_SCORE_PIC)
|
|
{
|
|
fprintf (file, _(" [pic]"));
|
|
}
|
|
if (elf_elfheader (abfd)->e_flags & EF_SCORE_FIXDEP)
|
|
{
|
|
fprintf (file, _(" [fix dep]"));
|
|
}
|
|
fputc ('\n', file);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
s7_elf32_score_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
|
|
{
|
|
bfd *obfd = info->output_bfd;
|
|
flagword in_flags;
|
|
flagword out_flags;
|
|
|
|
if (!_bfd_generic_verify_endian_match (ibfd, info))
|
|
return false;
|
|
|
|
/* FIXME: What should be checked when linking shared libraries? */
|
|
if ((ibfd->flags & DYNAMIC) != 0)
|
|
return true;
|
|
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
|
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
|
return true;
|
|
|
|
in_flags = elf_elfheader (ibfd)->e_flags;
|
|
out_flags = elf_elfheader (obfd)->e_flags;
|
|
|
|
if (! elf_flags_init (obfd))
|
|
{
|
|
elf_flags_init (obfd) = true;
|
|
elf_elfheader (obfd)->e_flags = in_flags;
|
|
|
|
if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
|
|
&& bfd_get_arch_info (obfd)->the_default)
|
|
{
|
|
return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
if (((in_flags & EF_SCORE_PIC) != 0) != ((out_flags & EF_SCORE_PIC) != 0))
|
|
{
|
|
_bfd_error_handler (_("%pB: warning: linking PIC files with non-PIC files"), ibfd);
|
|
}
|
|
|
|
/* Maybe dependency fix compatibility should be checked here. */
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
s7_elf32_score_new_section_hook (bfd *abfd, asection *sec)
|
|
{
|
|
struct _score_elf_section_data *sdata;
|
|
size_t amt = sizeof (*sdata);
|
|
|
|
sdata = bfd_zalloc (abfd, amt);
|
|
if (sdata == NULL)
|
|
return false;
|
|
sec->used_by_bfd = sdata;
|
|
|
|
return _bfd_elf_new_section_hook (abfd, sec);
|
|
}
|
|
|
|
#define elf_backend_omit_section_dynsym _bfd_elf_omit_section_dynsym_all
|