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3d4d4302b9
* elf32-arm.c: When retrieving SEC_LINKER_CREATED sections, use the above throughout rather than bfd_get_section_by_name. Use bfd_make_section_anyway rather than bfd_make_section when creating them. * elf32-bfin.c: Likewise. * elf32-cr16.c: Likewise. * elf32-cris.c: Likewise. * elf32-frv.c: Likewise. * elf32-hppa.c: Likewise. * elf32-i370.c: Likewise. * elf32-i386.c: Likewise. * elf32-lm32.c: Likewise. * elf32-m32c.c: Likewise. * elf32-m32r.c: Likewise. * elf32-m68k.c: Likewise. * elf32-microblaze.c: Likewise. * elf32-ppc.c: Likewise. * elf32-rl78.c: Likewise. * elf32-s390.c: Likewise. * elf32-score.c: Likewise. * elf32-score7.c: Likewise. * elf32-sh.c: Likewise. * elf32-tic6x.c: Likewise. * elf32-tilepro.c: Likewise. * elf32-vax.c: Likewise. * elf32-xstormy16.c: Likewise. * elf32-xtensa.c: Likewise. * elf64-alpha.c: Likewise. * elf64-hppa.c: Likewise. * elf64-ia64-vms.c: Likewise. * elf64-ppc.c: Likewise. * elf64-s390.c: Likewise. * elf64-sh64.c: Likewise. * elf64-sparc.c: Likewise. * elf64-x86-64.c: Likewise. * elfnn-ia64.c: Likewise. * elfxx-mips.c: Likewise. * elfxx-sparc.c: Likewise. * elfxx-tilegx.c: Likewise. * elflink.c: Likewise. * elf-vxworks.c: Likewise. * elf-m10300.c: Likewise. Also make use of htab plt, got and gotplt shortcuts. * bfd-in2.h: Regenerate. * elf32-lm32.c (lm32_elf_check_relocs): Use the correct bfd when calling create_rofixup_section. * elflink.c (bfd_elf_final_link): Simplify test for .dynstr.
2869 lines
95 KiB
C
2869 lines
95 KiB
C
/* Lattice Mico32-specific support for 32-bit ELF
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Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
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Contributed by Jon Beniston <jon@beniston.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 "elf-bfd.h"
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#include "elf/lm32.h"
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#define DEFAULT_STACK_SIZE 0x20000
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#define PLT_ENTRY_SIZE 20
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#define PLT0_ENTRY_WORD0 0
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#define PLT0_ENTRY_WORD1 0
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#define PLT0_ENTRY_WORD2 0
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#define PLT0_ENTRY_WORD3 0
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#define PLT0_ENTRY_WORD4 0
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#define PLT0_PIC_ENTRY_WORD0 0
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#define PLT0_PIC_ENTRY_WORD1 0
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#define PLT0_PIC_ENTRY_WORD2 0
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#define PLT0_PIC_ENTRY_WORD3 0
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#define PLT0_PIC_ENTRY_WORD4 0
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#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
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extern const bfd_target bfd_elf32_lm32fdpic_vec;
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#define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_lm32fdpic_vec)
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static bfd_reloc_status_type lm32_elf_gprel_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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/* The linker needs to keep track of the number of relocs that it
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decides to copy as dynamic relocs in check_relocs for each symbol.
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This is so that it can later discard them if they are found to be
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unnecessary. We store the information in a field extending the
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regular ELF linker hash table. */
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struct elf_lm32_dyn_relocs
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{
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struct elf_lm32_dyn_relocs *next;
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/* The input section of the reloc. */
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asection *sec;
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/* Total number of relocs copied for the input section. */
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bfd_size_type count;
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/* Number of pc-relative relocs copied for the input section. */
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bfd_size_type pc_count;
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};
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/* lm32 ELF linker hash entry. */
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struct elf_lm32_link_hash_entry
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{
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struct elf_link_hash_entry root;
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/* Track dynamic relocs copied for this symbol. */
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struct elf_lm32_dyn_relocs *dyn_relocs;
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};
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/* lm32 ELF linker hash table. */
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struct elf_lm32_link_hash_table
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{
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struct elf_link_hash_table root;
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/* Short-cuts to get to dynamic linker sections. */
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asection *sgot;
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asection *sgotplt;
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asection *srelgot;
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asection *sfixup32;
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asection *splt;
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asection *srelplt;
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asection *sdynbss;
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asection *srelbss;
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int relocs32;
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};
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/* Get the lm32 ELF linker hash table from a link_info structure. */
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#define lm32_elf_hash_table(p) \
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(elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
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== LM32_ELF_DATA ? ((struct elf_lm32_link_hash_table *) ((p)->hash)) : NULL)
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#define lm32fdpic_got_section(info) \
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(lm32_elf_hash_table (info)->sgot)
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#define lm32fdpic_gotrel_section(info) \
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(lm32_elf_hash_table (info)->srelgot)
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#define lm32fdpic_fixup32_section(info) \
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(lm32_elf_hash_table (info)->sfixup32)
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struct weak_symbol_list
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{
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const char *name;
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struct weak_symbol_list *next;
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};
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/* Create an entry in an lm32 ELF linker hash table. */
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static struct bfd_hash_entry *
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lm32_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
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struct bfd_hash_table *table,
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const char *string)
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{
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struct elf_lm32_link_hash_entry *ret =
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(struct elf_lm32_link_hash_entry *) entry;
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/* Allocate the structure if it has not already been allocated by a
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subclass. */
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if (ret == NULL)
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ret = bfd_hash_allocate (table,
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sizeof (struct elf_lm32_link_hash_entry));
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if (ret == NULL)
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return NULL;
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/* Call the allocation method of the superclass. */
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ret = ((struct elf_lm32_link_hash_entry *)
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_bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
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table, string));
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if (ret != NULL)
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{
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struct elf_lm32_link_hash_entry *eh;
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eh = (struct elf_lm32_link_hash_entry *) ret;
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eh->dyn_relocs = NULL;
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}
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return (struct bfd_hash_entry *) ret;
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}
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/* Create an lm32 ELF linker hash table. */
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static struct bfd_link_hash_table *
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lm32_elf_link_hash_table_create (bfd *abfd)
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{
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struct elf_lm32_link_hash_table *ret;
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bfd_size_type amt = sizeof (struct elf_lm32_link_hash_table);
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ret = bfd_malloc (amt);
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if (ret == NULL)
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return NULL;
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if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
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lm32_elf_link_hash_newfunc,
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sizeof (struct elf_lm32_link_hash_entry),
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LM32_ELF_DATA))
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{
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free (ret);
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return NULL;
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}
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ret->sgot = NULL;
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ret->sgotplt = NULL;
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ret->srelgot = NULL;
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ret->sfixup32 = NULL;
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ret->splt = NULL;
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ret->srelplt = NULL;
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ret->sdynbss = NULL;
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ret->srelbss = NULL;
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ret->relocs32 = 0;
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return &ret->root.root;
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}
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/* Add a fixup to the ROFIXUP section. */
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static bfd_vma
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_lm32fdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma relocation)
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{
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bfd_vma fixup_offset;
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if (rofixup->flags & SEC_EXCLUDE)
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return -1;
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fixup_offset = rofixup->reloc_count * 4;
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if (rofixup->contents)
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{
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BFD_ASSERT (fixup_offset < rofixup->size);
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if (fixup_offset < rofixup->size)
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bfd_put_32 (output_bfd, relocation, rofixup->contents + fixup_offset);
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}
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rofixup->reloc_count++;
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return fixup_offset;
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}
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/* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
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shortcuts to them in our hash table. */
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static bfd_boolean
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create_got_section (bfd *dynobj, struct bfd_link_info *info)
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{
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struct elf_lm32_link_hash_table *htab;
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asection *s;
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/* This function may be called more than once. */
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s = bfd_get_linker_section (dynobj, ".got");
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if (s != NULL)
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return TRUE;
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htab = lm32_elf_hash_table (info);
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if (htab == NULL)
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return FALSE;
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if (! _bfd_elf_create_got_section (dynobj, info))
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return FALSE;
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htab->sgot = bfd_get_linker_section (dynobj, ".got");
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htab->sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
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htab->srelgot = bfd_get_linker_section (dynobj, ".rela.got");
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if (! htab->sgot || ! htab->sgotplt || ! htab->srelgot)
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abort ();
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return TRUE;
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}
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/* Create .rofixup sections in DYNOBJ, and set up
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shortcuts to them in our hash table. */
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static bfd_boolean
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create_rofixup_section (bfd *dynobj, struct bfd_link_info *info)
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{
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struct elf_lm32_link_hash_table *htab;
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htab = lm32_elf_hash_table (info);
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if (htab == NULL)
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return FALSE;
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/* Fixup section for R_LM32_32 relocs. */
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lm32fdpic_fixup32_section (info)
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= bfd_make_section_anyway_with_flags (dynobj,
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".rofixup",
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(SEC_ALLOC
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| SEC_LOAD
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| SEC_HAS_CONTENTS
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| SEC_IN_MEMORY
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| SEC_LINKER_CREATED
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| SEC_READONLY));
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if (lm32fdpic_fixup32_section (info) == NULL
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|| ! bfd_set_section_alignment (dynobj,
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lm32fdpic_fixup32_section (info), 2))
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return FALSE;
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return TRUE;
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}
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static reloc_howto_type lm32_elf_howto_table [] =
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{
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/* This reloc does nothing. */
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HOWTO (R_LM32_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* An 8 bit absolute relocation. */
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HOWTO (R_LM32_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_8", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 16 bit absolute relocation. */
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HOWTO (R_LM32_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A 32 bit absolute relocation. */
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HOWTO (R_LM32_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_32", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_LM32_HI16, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield,/* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_HI16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_LM32_LO16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_LO16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_LM32_GPREL16, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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lm32_elf_gprel_reloc, /* special_function */
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"R_LM32_GPREL16", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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HOWTO (R_LM32_CALL, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_CALL", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x3ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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HOWTO (R_LM32_BRANCH, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_BRANCH", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy. */
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HOWTO (R_LM32_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_LM32_GNU_VTINHERIT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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|
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/* GNU extension to record C++ vtable member usage. */
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HOWTO (R_LM32_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn,/* special_function */
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|
"R_LM32_GNU_VTENTRY", /* name */
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FALSE, /* partial_inplace */
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|
0, /* src_mask */
|
|
0, /* dst_mask */
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|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_LM32_16_GOT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_LM32_16_GOT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0xffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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|
|
|
HOWTO (R_LM32_GOTOFF_HI16, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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|
bfd_elf_generic_reloc, /* special_function */
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"R_LM32_GOTOFF_HI16", /* name */
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FALSE, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_LM32_GOTOFF_LO16, /* 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_LM32_GOTOFF_LO16", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffff, /* src_mask */
|
|
0xffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_LM32_COPY, /* type */
|
|
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_LM32_COPY", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_LM32_GLOB_DAT, /* type */
|
|
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_LM32_GLOB_DAT", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_LM32_JMP_SLOT, /* type */
|
|
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_LM32_JMP_SLOT", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
HOWTO (R_LM32_RELATIVE, /* type */
|
|
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_LM32_RELATIVE", /* name */
|
|
FALSE, /* partial_inplace */
|
|
0xffffffff, /* src_mask */
|
|
0xffffffff, /* dst_mask */
|
|
FALSE), /* pcrel_offset */
|
|
|
|
};
|
|
|
|
/* Map BFD reloc types to lm32 ELF reloc types. */
|
|
|
|
struct lm32_reloc_map
|
|
{
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
|
unsigned char elf_reloc_val;
|
|
};
|
|
|
|
static const struct lm32_reloc_map lm32_reloc_map[] =
|
|
{
|
|
{ BFD_RELOC_NONE, R_LM32_NONE },
|
|
{ BFD_RELOC_8, R_LM32_8 },
|
|
{ BFD_RELOC_16, R_LM32_16 },
|
|
{ BFD_RELOC_32, R_LM32_32 },
|
|
{ BFD_RELOC_HI16, R_LM32_HI16 },
|
|
{ BFD_RELOC_LO16, R_LM32_LO16 },
|
|
{ BFD_RELOC_GPREL16, R_LM32_GPREL16 },
|
|
{ BFD_RELOC_LM32_CALL, R_LM32_CALL },
|
|
{ BFD_RELOC_LM32_BRANCH, R_LM32_BRANCH },
|
|
{ BFD_RELOC_VTABLE_INHERIT, R_LM32_GNU_VTINHERIT },
|
|
{ BFD_RELOC_VTABLE_ENTRY, R_LM32_GNU_VTENTRY },
|
|
{ BFD_RELOC_LM32_16_GOT, R_LM32_16_GOT },
|
|
{ BFD_RELOC_LM32_GOTOFF_HI16, R_LM32_GOTOFF_HI16 },
|
|
{ BFD_RELOC_LM32_GOTOFF_LO16, R_LM32_GOTOFF_LO16 },
|
|
{ BFD_RELOC_LM32_COPY, R_LM32_COPY },
|
|
{ BFD_RELOC_LM32_GLOB_DAT, R_LM32_GLOB_DAT },
|
|
{ BFD_RELOC_LM32_JMP_SLOT, R_LM32_JMP_SLOT },
|
|
{ BFD_RELOC_LM32_RELATIVE, R_LM32_RELATIVE },
|
|
};
|
|
|
|
static reloc_howto_type *
|
|
lm32_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
bfd_reloc_code_real_type code)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < sizeof (lm32_reloc_map) / sizeof (lm32_reloc_map[0]); i++)
|
|
if (lm32_reloc_map[i].bfd_reloc_val == code)
|
|
return &lm32_elf_howto_table[lm32_reloc_map[i].elf_reloc_val];
|
|
return NULL;
|
|
}
|
|
|
|
static reloc_howto_type *
|
|
lm32_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
|
const char *r_name)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0;
|
|
i < sizeof (lm32_elf_howto_table) / sizeof (lm32_elf_howto_table[0]);
|
|
i++)
|
|
if (lm32_elf_howto_table[i].name != NULL
|
|
&& strcasecmp (lm32_elf_howto_table[i].name, r_name) == 0)
|
|
return &lm32_elf_howto_table[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* Set the howto pointer for an Lattice Mico32 ELF reloc. */
|
|
|
|
static void
|
|
lm32_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
|
|
arelent *cache_ptr,
|
|
Elf_Internal_Rela *dst)
|
|
{
|
|
unsigned int r_type;
|
|
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
|
BFD_ASSERT (r_type < (unsigned int) R_LM32_max);
|
|
cache_ptr->howto = &lm32_elf_howto_table[r_type];
|
|
}
|
|
|
|
/* Set the right machine number for an Lattice Mico32 ELF file. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_object_p (bfd *abfd)
|
|
{
|
|
return bfd_default_set_arch_mach (abfd, bfd_arch_lm32, bfd_mach_lm32);
|
|
}
|
|
|
|
/* Set machine type flags just before file is written out. */
|
|
|
|
static void
|
|
lm32_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
|
|
{
|
|
elf_elfheader (abfd)->e_machine = EM_LATTICEMICO32;
|
|
elf_elfheader (abfd)->e_flags &=~ EF_LM32_MACH;
|
|
switch (bfd_get_mach (abfd))
|
|
{
|
|
case bfd_mach_lm32:
|
|
elf_elfheader (abfd)->e_flags |= E_LM32_MACH;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
/* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
|
|
dangerous relocation. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
|
|
{
|
|
unsigned int count;
|
|
asymbol **sym;
|
|
unsigned int i;
|
|
|
|
/* If we've already figured out what GP will be, just return it. */
|
|
*pgp = _bfd_get_gp_value (output_bfd);
|
|
if (*pgp)
|
|
return TRUE;
|
|
|
|
count = bfd_get_symcount (output_bfd);
|
|
sym = bfd_get_outsymbols (output_bfd);
|
|
|
|
/* The linker script will have created a symbol named `_gp' with the
|
|
appropriate value. */
|
|
if (sym == NULL)
|
|
i = count;
|
|
else
|
|
{
|
|
for (i = 0; i < count; i++, sym++)
|
|
{
|
|
const char *name;
|
|
|
|
name = bfd_asymbol_name (*sym);
|
|
if (*name == '_' && strcmp (name, "_gp") == 0)
|
|
{
|
|
*pgp = bfd_asymbol_value (*sym);
|
|
_bfd_set_gp_value (output_bfd, *pgp);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (i >= count)
|
|
{
|
|
/* Only get the error once. */
|
|
*pgp = 4;
|
|
_bfd_set_gp_value (output_bfd, *pgp);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* We have to figure out the gp value, so that we can adjust the
|
|
symbol value correctly. We look up the symbol _gp in the output
|
|
BFD. If we can't find it, we're stuck. We cache it in the ELF
|
|
target data. We don't need to adjust the symbol value for an
|
|
external symbol if we are producing relocatable output. */
|
|
|
|
static bfd_reloc_status_type
|
|
lm32_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
|
|
char **error_message, bfd_vma *pgp)
|
|
{
|
|
if (bfd_is_und_section (symbol->section) && !relocatable)
|
|
{
|
|
*pgp = 0;
|
|
return bfd_reloc_undefined;
|
|
}
|
|
|
|
*pgp = _bfd_get_gp_value (output_bfd);
|
|
if (*pgp == 0 && (!relocatable || (symbol->flags & BSF_SECTION_SYM) != 0))
|
|
{
|
|
if (relocatable)
|
|
{
|
|
/* Make up a value. */
|
|
*pgp = symbol->section->output_section->vma + 0x4000;
|
|
_bfd_set_gp_value (output_bfd, *pgp);
|
|
}
|
|
else if (!lm32_elf_assign_gp (output_bfd, pgp))
|
|
{
|
|
*error_message =
|
|
(char *)
|
|
_("global pointer relative relocation when _gp not defined");
|
|
return bfd_reloc_dangerous;
|
|
}
|
|
}
|
|
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
lm32_elf_do_gprel_relocate (bfd *abfd,
|
|
reloc_howto_type *howto,
|
|
asection *input_section ATTRIBUTE_UNUSED,
|
|
bfd_byte *data,
|
|
bfd_vma offset,
|
|
bfd_vma symbol_value,
|
|
bfd_vma addend)
|
|
{
|
|
return _bfd_final_link_relocate (howto, abfd, input_section,
|
|
data, offset, symbol_value, addend);
|
|
}
|
|
|
|
static bfd_reloc_status_type
|
|
lm32_elf_gprel_reloc (bfd *abfd,
|
|
arelent *reloc_entry,
|
|
asymbol *symbol,
|
|
void *data,
|
|
asection *input_section,
|
|
bfd *output_bfd,
|
|
char **msg)
|
|
{
|
|
bfd_vma relocation;
|
|
bfd_vma gp;
|
|
bfd_reloc_status_type r;
|
|
|
|
if (output_bfd != (bfd *) NULL
|
|
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
|
&& (!reloc_entry->howto->partial_inplace || reloc_entry->addend == 0))
|
|
{
|
|
reloc_entry->address += input_section->output_offset;
|
|
return bfd_reloc_ok;
|
|
}
|
|
|
|
if (output_bfd != NULL)
|
|
return bfd_reloc_ok;
|
|
|
|
relocation = symbol->value
|
|
+ symbol->section->output_section->vma + symbol->section->output_offset;
|
|
|
|
if ((r =
|
|
lm32_elf_final_gp (abfd, symbol, FALSE, msg, &gp)) == bfd_reloc_ok)
|
|
{
|
|
relocation = relocation + reloc_entry->addend - gp;
|
|
reloc_entry->addend = 0;
|
|
if ((signed) relocation < -32768 || (signed) relocation > 32767)
|
|
{
|
|
*msg = _("global pointer relative address out of range");
|
|
r = bfd_reloc_outofrange;
|
|
}
|
|
else
|
|
{
|
|
r = lm32_elf_do_gprel_relocate (abfd, reloc_entry->howto,
|
|
input_section,
|
|
data, reloc_entry->address,
|
|
relocation, reloc_entry->addend);
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* Find the segment number in which OSEC, and output section, is
|
|
located. */
|
|
|
|
static unsigned
|
|
_lm32fdpic_osec_to_segment (bfd *output_bfd, asection *osec)
|
|
{
|
|
struct elf_segment_map *m;
|
|
Elf_Internal_Phdr *p;
|
|
|
|
/* Find the segment that contains the output_section. */
|
|
for (m = elf_tdata (output_bfd)->segment_map,
|
|
p = elf_tdata (output_bfd)->phdr;
|
|
m != NULL;
|
|
m = m->next, p++)
|
|
{
|
|
int i;
|
|
|
|
for (i = m->count - 1; i >= 0; i--)
|
|
if (m->sections[i] == osec)
|
|
break;
|
|
|
|
if (i >= 0)
|
|
break;
|
|
}
|
|
|
|
return p - elf_tdata (output_bfd)->phdr;
|
|
}
|
|
|
|
/* Determine if an output section is read-only. */
|
|
|
|
inline static bfd_boolean
|
|
_lm32fdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
|
|
{
|
|
unsigned seg = _lm32fdpic_osec_to_segment (output_bfd, osec);
|
|
|
|
return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
|
|
}
|
|
|
|
/* Relocate a section */
|
|
|
|
static bfd_boolean
|
|
lm32_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_tdata (input_bfd)->symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
|
|
Elf_Internal_Rela *rel, *relend;
|
|
struct elf_lm32_link_hash_table *htab = lm32_elf_hash_table (info);
|
|
bfd *dynobj;
|
|
bfd_vma *local_got_offsets;
|
|
asection *sgot;
|
|
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
dynobj = htab->root.dynobj;
|
|
local_got_offsets = elf_local_got_offsets (input_bfd);
|
|
|
|
sgot = htab->sgot;
|
|
|
|
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (input_bfd);
|
|
|
|
rel = relocs;
|
|
relend = relocs + input_section->reloc_count;
|
|
for (; rel < relend; rel++)
|
|
{
|
|
reloc_howto_type *howto;
|
|
unsigned int r_type;
|
|
unsigned long r_symndx;
|
|
Elf_Internal_Sym *sym;
|
|
asection *sec;
|
|
struct elf_link_hash_entry *h;
|
|
bfd_vma relocation;
|
|
bfd_vma gp;
|
|
bfd_reloc_status_type r;
|
|
const char *name = NULL;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
|
|
if (r_type == R_LM32_GNU_VTENTRY
|
|
|| r_type == R_LM32_GNU_VTINHERIT )
|
|
continue;
|
|
|
|
h = NULL;
|
|
sym = NULL;
|
|
sec = NULL;
|
|
|
|
howto = lm32_elf_howto_table + r_type;
|
|
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
/* It's a local symbol. */
|
|
sym = local_syms + r_symndx;
|
|
sec = local_sections[r_symndx];
|
|
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
|
name = bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
|
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
|
}
|
|
else
|
|
{
|
|
/* It's a global symbol. */
|
|
bfd_boolean unresolved_reloc;
|
|
bfd_boolean warned;
|
|
|
|
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
|
r_symndx, symtab_hdr, sym_hashes,
|
|
h, sec, relocation,
|
|
unresolved_reloc, warned);
|
|
name = h->root.root.string;
|
|
}
|
|
|
|
if (sec != NULL && discarded_section (sec))
|
|
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
|
|
rel, 1, relend, howto, 0, contents);
|
|
|
|
if (info->relocatable)
|
|
{
|
|
/* 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 (sym == NULL || ELF_ST_TYPE (sym->st_info) != STT_SECTION)
|
|
continue;
|
|
|
|
/* If partial_inplace, we need to store any additional addend
|
|
back in the section. */
|
|
if (! howto->partial_inplace)
|
|
continue;
|
|
|
|
/* Shouldn't reach here. */
|
|
abort ();
|
|
r = bfd_reloc_ok;
|
|
}
|
|
else
|
|
{
|
|
switch (howto->type)
|
|
{
|
|
case R_LM32_GPREL16:
|
|
if (!lm32_elf_assign_gp (output_bfd, &gp))
|
|
r = bfd_reloc_dangerous;
|
|
else
|
|
{
|
|
relocation = relocation + rel->r_addend - gp;
|
|
rel->r_addend = 0;
|
|
if ((signed)relocation < -32768 || (signed)relocation > 32767)
|
|
r = bfd_reloc_outofrange;
|
|
else
|
|
{
|
|
r = _bfd_final_link_relocate (howto, input_bfd,
|
|
input_section, contents,
|
|
rel->r_offset, relocation,
|
|
rel->r_addend);
|
|
}
|
|
}
|
|
break;
|
|
case R_LM32_16_GOT:
|
|
/* Relocation is to the entry for this symbol in the global
|
|
offset table. */
|
|
BFD_ASSERT (sgot != NULL);
|
|
if (h != NULL)
|
|
{
|
|
bfd_boolean dyn;
|
|
bfd_vma off;
|
|
|
|
off = h->got.offset;
|
|
BFD_ASSERT (off != (bfd_vma) -1);
|
|
|
|
dyn = htab->root.dynamic_sections_created;
|
|
if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
|
|| (info->shared
|
|
&& (info->symbolic
|
|
|| h->dynindx == -1
|
|
|| h->forced_local)
|
|
&& h->def_regular))
|
|
{
|
|
/* This is actually a static link, or it is a
|
|
-Bsymbolic link and the symbol is defined
|
|
locally, or the symbol was forced to be local
|
|
because of a version file. We must initialize
|
|
this entry in the global offset table. Since the
|
|
offset must always be a multiple of 4, we use the
|
|
least significant bit to record whether we have
|
|
initialized it already.
|
|
|
|
When doing a dynamic link, we create a .rela.got
|
|
relocation entry to initialize the value. This
|
|
is done in the finish_dynamic_symbol routine. */
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
/* Write entry in GOT */
|
|
bfd_put_32 (output_bfd, relocation,
|
|
sgot->contents + off);
|
|
/* Create entry in .rofixup pointing to GOT entry. */
|
|
if (IS_FDPIC (output_bfd) && h->root.type != bfd_link_hash_undefweak)
|
|
{
|
|
_lm32fdpic_add_rofixup (output_bfd,
|
|
lm32fdpic_fixup32_section
|
|
(info),
|
|
sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ off);
|
|
}
|
|
/* Mark GOT entry as having been written. */
|
|
h->got.offset |= 1;
|
|
}
|
|
}
|
|
|
|
relocation = sgot->output_offset + off;
|
|
}
|
|
else
|
|
{
|
|
bfd_vma off;
|
|
bfd_byte *loc;
|
|
|
|
BFD_ASSERT (local_got_offsets != NULL
|
|
&& local_got_offsets[r_symndx] != (bfd_vma) -1);
|
|
|
|
/* Get offset into GOT table. */
|
|
off = local_got_offsets[r_symndx];
|
|
|
|
/* The offset must always be a multiple of 4. We use
|
|
the least significant bit to record whether we have
|
|
already processed this entry. */
|
|
if ((off & 1) != 0)
|
|
off &= ~1;
|
|
else
|
|
{
|
|
/* Write entry in GOT. */
|
|
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
|
/* Create entry in .rofixup pointing to GOT entry. */
|
|
if (IS_FDPIC (output_bfd))
|
|
{
|
|
_lm32fdpic_add_rofixup (output_bfd,
|
|
lm32fdpic_fixup32_section
|
|
(info),
|
|
sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ off);
|
|
}
|
|
|
|
if (info->shared)
|
|
{
|
|
asection *srelgot;
|
|
Elf_Internal_Rela outrel;
|
|
|
|
/* We need to generate a R_LM32_RELATIVE reloc
|
|
for the dynamic linker. */
|
|
srelgot = bfd_get_linker_section (dynobj,
|
|
".rela.got");
|
|
BFD_ASSERT (srelgot != NULL);
|
|
|
|
outrel.r_offset = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ off);
|
|
outrel.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
|
|
outrel.r_addend = relocation;
|
|
loc = srelgot->contents;
|
|
loc += srelgot->reloc_count * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &outrel,loc);
|
|
++srelgot->reloc_count;
|
|
}
|
|
|
|
local_got_offsets[r_symndx] |= 1;
|
|
}
|
|
|
|
|
|
relocation = sgot->output_offset + off;
|
|
}
|
|
|
|
/* Addend should be zero. */
|
|
if (rel->r_addend != 0)
|
|
(*_bfd_error_handler) (_("internal error: addend should be zero for R_LM32_16_GOT"));
|
|
|
|
r = _bfd_final_link_relocate (howto,
|
|
input_bfd,
|
|
input_section,
|
|
contents,
|
|
rel->r_offset,
|
|
relocation,
|
|
rel->r_addend);
|
|
break;
|
|
|
|
case R_LM32_GOTOFF_LO16:
|
|
case R_LM32_GOTOFF_HI16:
|
|
/* Relocation is offset from GOT. */
|
|
BFD_ASSERT (sgot != NULL);
|
|
relocation -= sgot->output_section->vma;
|
|
/* Account for sign-extension. */
|
|
if ((r_type == R_LM32_GOTOFF_HI16)
|
|
&& ((relocation + rel->r_addend) & 0x8000))
|
|
rel->r_addend += 0x10000;
|
|
r = _bfd_final_link_relocate (howto,
|
|
input_bfd,
|
|
input_section,
|
|
contents,
|
|
rel->r_offset,
|
|
relocation,
|
|
rel->r_addend);
|
|
break;
|
|
|
|
case R_LM32_32:
|
|
if (IS_FDPIC (output_bfd))
|
|
{
|
|
if ((!h) || (h && h->root.type != bfd_link_hash_undefweak))
|
|
{
|
|
/* Only create .rofixup entries for relocs in loadable sections. */
|
|
if ((bfd_get_section_flags (output_bfd, input_section->output_section)
|
|
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
|
|
|
|
{
|
|
/* Check address to be modified is writable. */
|
|
if (_lm32fdpic_osec_readonly_p (output_bfd,
|
|
input_section
|
|
->output_section))
|
|
{
|
|
info->callbacks->warning
|
|
(info,
|
|
_("cannot emit dynamic relocations in read-only section"),
|
|
name, input_bfd, input_section, rel->r_offset);
|
|
return FALSE;
|
|
}
|
|
/* Create entry in .rofixup section. */
|
|
_lm32fdpic_add_rofixup (output_bfd,
|
|
lm32fdpic_fixup32_section (info),
|
|
input_section->output_section->vma
|
|
+ input_section->output_offset
|
|
+ rel->r_offset);
|
|
}
|
|
}
|
|
}
|
|
/* Fall through. */
|
|
|
|
default:
|
|
r = _bfd_final_link_relocate (howto,
|
|
input_bfd,
|
|
input_section,
|
|
contents,
|
|
rel->r_offset,
|
|
relocation,
|
|
rel->r_addend);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (r != bfd_reloc_ok)
|
|
{
|
|
const char *msg = NULL;
|
|
arelent bfd_reloc;
|
|
|
|
lm32_info_to_howto_rela (input_bfd, &bfd_reloc, rel);
|
|
howto = bfd_reloc.howto;
|
|
|
|
if (h != NULL)
|
|
name = h->root.root.string;
|
|
else
|
|
{
|
|
name = (bfd_elf_string_from_elf_section
|
|
(input_bfd, symtab_hdr->sh_link, sym->st_name));
|
|
if (name == NULL || *name == '\0')
|
|
name = bfd_section_name (input_bfd, sec);
|
|
}
|
|
|
|
switch (r)
|
|
{
|
|
case bfd_reloc_overflow:
|
|
if ((h != NULL)
|
|
&& (h->root.type == bfd_link_hash_undefweak))
|
|
break;
|
|
if (! ((*info->callbacks->reloc_overflow)
|
|
(info, (h ? &h->root : NULL), name, howto->name,
|
|
(bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
|
|
return FALSE;
|
|
break;
|
|
|
|
case bfd_reloc_undefined:
|
|
if (! ((*info->callbacks->undefined_symbol)
|
|
(info, name, input_bfd, input_section,
|
|
rel->r_offset, TRUE)))
|
|
return FALSE;
|
|
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:
|
|
if (!((*info->callbacks->warning)
|
|
(info, msg, name, input_bfd, input_section,
|
|
rel->r_offset)))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static asection *
|
|
lm32_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_LM32_GNU_VTINHERIT:
|
|
case R_LM32_GNU_VTENTRY:
|
|
return NULL;
|
|
}
|
|
|
|
return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
|
|
}
|
|
|
|
static bfd_boolean
|
|
lm32_elf_gc_sweep_hook (bfd *abfd,
|
|
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
|
asection *sec,
|
|
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
|
|
{
|
|
/* Update the got entry reference counts for the section being removed. */
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes;
|
|
bfd_signed_vma *local_got_refcounts;
|
|
const Elf_Internal_Rela *rel, *relend;
|
|
|
|
elf_section_data (sec)->local_dynrel = NULL;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
|
|
|
relend = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < relend; rel++)
|
|
{
|
|
unsigned long r_symndx;
|
|
struct elf_link_hash_entry *h = NULL;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
if (r_symndx >= symtab_hdr->sh_info)
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
|
|
switch (ELF32_R_TYPE (rel->r_info))
|
|
{
|
|
case R_LM32_16_GOT:
|
|
if (h != NULL)
|
|
{
|
|
if (h->got.refcount > 0)
|
|
h->got.refcount--;
|
|
}
|
|
else
|
|
{
|
|
if (local_got_refcounts && local_got_refcounts[r_symndx] > 0)
|
|
local_got_refcounts[r_symndx]--;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Look through the relocs for a section during the first phase. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_check_relocs (bfd *abfd,
|
|
struct bfd_link_info *info,
|
|
asection *sec,
|
|
const Elf_Internal_Rela *relocs)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
|
const Elf_Internal_Rela *rel;
|
|
const Elf_Internal_Rela *rel_end;
|
|
struct elf_lm32_link_hash_table *htab;
|
|
bfd *dynobj;
|
|
|
|
if (info->relocatable)
|
|
return TRUE;
|
|
|
|
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (abfd);
|
|
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
|
|
if (!elf_bad_symtab (abfd))
|
|
sym_hashes_end -= symtab_hdr->sh_info;
|
|
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
dynobj = htab->root.dynobj;
|
|
|
|
rel_end = relocs + sec->reloc_count;
|
|
for (rel = relocs; rel < rel_end; rel++)
|
|
{
|
|
int r_type;
|
|
struct elf_link_hash_entry *h;
|
|
unsigned long r_symndx;
|
|
|
|
r_symndx = ELF32_R_SYM (rel->r_info);
|
|
r_type = ELF32_R_TYPE (rel->r_info);
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
h = NULL;
|
|
else
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
|
|
/* Some relocs require a global offset table. */
|
|
if (htab->sgot == NULL)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case R_LM32_16_GOT:
|
|
case R_LM32_GOTOFF_HI16:
|
|
case R_LM32_GOTOFF_LO16:
|
|
if (dynobj == NULL)
|
|
htab->root.dynobj = dynobj = abfd;
|
|
if (! create_got_section (dynobj, info))
|
|
return FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Some relocs require a rofixup table. */
|
|
if (IS_FDPIC (abfd))
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case R_LM32_32:
|
|
/* FDPIC requires a GOT if there is a .rofixup section
|
|
(Normal ELF doesn't). */
|
|
if (dynobj == NULL)
|
|
htab->root.dynobj = dynobj = abfd;
|
|
if (! create_got_section (dynobj, info))
|
|
return FALSE;
|
|
/* Create .rofixup section */
|
|
if (htab->sfixup32 == NULL)
|
|
{
|
|
if (! create_rofixup_section (dynobj, info))
|
|
return FALSE;
|
|
}
|
|
break;
|
|
case R_LM32_16_GOT:
|
|
case R_LM32_GOTOFF_HI16:
|
|
case R_LM32_GOTOFF_LO16:
|
|
/* Create .rofixup section. */
|
|
if (htab->sfixup32 == NULL)
|
|
{
|
|
if (dynobj == NULL)
|
|
htab->root.dynobj = dynobj = abfd;
|
|
if (! create_rofixup_section (dynobj, info))
|
|
return FALSE;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch (r_type)
|
|
{
|
|
case R_LM32_16_GOT:
|
|
if (h != NULL)
|
|
h->got.refcount += 1;
|
|
else
|
|
{
|
|
bfd_signed_vma *local_got_refcounts;
|
|
|
|
/* This is a global offset table entry for a local symbol. */
|
|
local_got_refcounts = elf_local_got_refcounts (abfd);
|
|
if (local_got_refcounts == NULL)
|
|
{
|
|
bfd_size_type size;
|
|
|
|
size = symtab_hdr->sh_info;
|
|
size *= sizeof (bfd_signed_vma);
|
|
local_got_refcounts = bfd_zalloc (abfd, size);
|
|
if (local_got_refcounts == NULL)
|
|
return FALSE;
|
|
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
|
}
|
|
local_got_refcounts[r_symndx] += 1;
|
|
}
|
|
break;
|
|
|
|
/* This relocation describes the C++ object vtable hierarchy.
|
|
Reconstruct it for later use during GC. */
|
|
case R_LM32_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_LM32_GNU_VTENTRY:
|
|
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
|
return FALSE;
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish up the dynamic sections. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_finish_dynamic_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_lm32_link_hash_table *htab;
|
|
bfd *dynobj;
|
|
asection *sdyn;
|
|
asection *sgot;
|
|
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
dynobj = htab->root.dynobj;
|
|
|
|
sgot = htab->sgotplt;
|
|
sdyn = bfd_get_linker_section (dynobj, ".dynamic");
|
|
|
|
if (htab->root.dynamic_sections_created)
|
|
{
|
|
asection *splt;
|
|
Elf32_External_Dyn *dyncon, *dynconend;
|
|
|
|
BFD_ASSERT (sgot != NULL && sdyn != NULL);
|
|
|
|
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
|
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
|
|
|
for (; dyncon < dynconend; dyncon++)
|
|
{
|
|
Elf_Internal_Dyn dyn;
|
|
asection *s;
|
|
|
|
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
|
|
|
switch (dyn.d_tag)
|
|
{
|
|
default:
|
|
break;
|
|
|
|
case DT_PLTGOT:
|
|
s = htab->sgot->output_section;
|
|
goto get_vma;
|
|
case DT_JMPREL:
|
|
s = htab->srelplt->output_section;
|
|
get_vma:
|
|
BFD_ASSERT (s != NULL);
|
|
dyn.d_un.d_ptr = s->vma;
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
break;
|
|
|
|
case DT_PLTRELSZ:
|
|
s = htab->srelplt->output_section;
|
|
BFD_ASSERT (s != NULL);
|
|
dyn.d_un.d_val = s->size;
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
break;
|
|
|
|
case DT_RELASZ:
|
|
/* My reading of the SVR4 ABI indicates that the
|
|
procedure linkage table relocs (DT_JMPREL) should be
|
|
included in the overall relocs (DT_RELA). This is
|
|
what Solaris does. However, UnixWare can not handle
|
|
that case. Therefore, we override the DT_RELASZ entry
|
|
here to make it not include the JMPREL relocs. Since
|
|
the linker script arranges for .rela.plt to follow all
|
|
other relocation sections, we don't have to worry
|
|
about changing the DT_RELA entry. */
|
|
if (htab->srelplt != NULL)
|
|
{
|
|
s = htab->srelplt->output_section;
|
|
dyn.d_un.d_val -= s->size;
|
|
}
|
|
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Fill in the first entry in the procedure linkage table. */
|
|
splt = htab->splt;
|
|
if (splt && splt->size > 0)
|
|
{
|
|
if (info->shared)
|
|
{
|
|
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD0, splt->contents);
|
|
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD1, splt->contents + 4);
|
|
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD2, splt->contents + 8);
|
|
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD3, splt->contents + 12);
|
|
bfd_put_32 (output_bfd, PLT0_PIC_ENTRY_WORD4, splt->contents + 16);
|
|
}
|
|
else
|
|
{
|
|
unsigned long addr;
|
|
/* addr = .got + 4 */
|
|
addr = sgot->output_section->vma + sgot->output_offset + 4;
|
|
bfd_put_32 (output_bfd,
|
|
PLT0_ENTRY_WORD0 | ((addr >> 16) & 0xffff),
|
|
splt->contents);
|
|
bfd_put_32 (output_bfd,
|
|
PLT0_ENTRY_WORD1 | (addr & 0xffff),
|
|
splt->contents + 4);
|
|
bfd_put_32 (output_bfd, PLT0_ENTRY_WORD2, splt->contents + 8);
|
|
bfd_put_32 (output_bfd, PLT0_ENTRY_WORD3, splt->contents + 12);
|
|
bfd_put_32 (output_bfd, PLT0_ENTRY_WORD4, splt->contents + 16);
|
|
}
|
|
|
|
elf_section_data (splt->output_section)->this_hdr.sh_entsize =
|
|
PLT_ENTRY_SIZE;
|
|
}
|
|
}
|
|
|
|
/* Fill in the first three entries in the global offset table. */
|
|
if (sgot && sgot->size > 0)
|
|
{
|
|
if (sdyn == NULL)
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
|
|
else
|
|
bfd_put_32 (output_bfd,
|
|
sdyn->output_section->vma + sdyn->output_offset,
|
|
sgot->contents);
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
|
|
|
|
/* FIXME: This can be null if create_dynamic_sections wasn't called. */
|
|
if (elf_section_data (sgot->output_section) != NULL)
|
|
elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
|
|
}
|
|
|
|
if (lm32fdpic_fixup32_section (info))
|
|
{
|
|
struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
|
|
bfd_vma got_value = hgot->root.u.def.value
|
|
+ hgot->root.u.def.section->output_section->vma
|
|
+ hgot->root.u.def.section->output_offset;
|
|
struct bfd_link_hash_entry *hend;
|
|
|
|
/* Last entry is pointer to GOT. */
|
|
_lm32fdpic_add_rofixup (output_bfd, lm32fdpic_fixup32_section (info), got_value);
|
|
|
|
/* Check we wrote enough entries. */
|
|
if (lm32fdpic_fixup32_section (info)->size
|
|
!= (lm32fdpic_fixup32_section (info)->reloc_count * 4))
|
|
{
|
|
(*_bfd_error_handler)
|
|
("LINKER BUG: .rofixup section size mismatch: size/4 %d != relocs %d",
|
|
lm32fdpic_fixup32_section (info)->size/4,
|
|
lm32fdpic_fixup32_section (info)->reloc_count);
|
|
return FALSE;
|
|
}
|
|
|
|
hend = bfd_link_hash_lookup (info->hash, "__ROFIXUP_END__",
|
|
FALSE, FALSE, TRUE);
|
|
if (hend
|
|
&& (hend->type == bfd_link_hash_defined
|
|
|| hend->type == bfd_link_hash_defweak))
|
|
{
|
|
bfd_vma value =
|
|
lm32fdpic_fixup32_section (info)->output_section->vma
|
|
+ lm32fdpic_fixup32_section (info)->output_offset
|
|
+ lm32fdpic_fixup32_section (info)->size
|
|
- hend->u.def.section->output_section->vma
|
|
- hend->u.def.section->output_offset;
|
|
BFD_ASSERT (hend->u.def.value == value);
|
|
if (hend->u.def.value != value)
|
|
{
|
|
(*_bfd_error_handler)
|
|
("LINKER BUG: .rofixup section hend->u.def.value != value: %ld != %ld", hend->u.def.value, value);
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Finish up dynamic symbol handling. We set the contents of various
|
|
dynamic sections here. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_finish_dynamic_symbol (bfd *output_bfd,
|
|
struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *h,
|
|
Elf_Internal_Sym *sym)
|
|
{
|
|
struct elf_lm32_link_hash_table *htab;
|
|
bfd_byte *loc;
|
|
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
if (h->plt.offset != (bfd_vma) -1)
|
|
{
|
|
asection *splt;
|
|
asection *sgot;
|
|
asection *srela;
|
|
|
|
bfd_vma plt_index;
|
|
bfd_vma got_offset;
|
|
Elf_Internal_Rela rela;
|
|
|
|
/* This symbol has an entry in the procedure linkage table. Set
|
|
it up. */
|
|
BFD_ASSERT (h->dynindx != -1);
|
|
|
|
splt = htab->splt;
|
|
sgot = htab->sgotplt;
|
|
srela = htab->srelplt;
|
|
BFD_ASSERT (splt != NULL && sgot != NULL && srela != NULL);
|
|
|
|
/* Get the index in the procedure linkage table which
|
|
corresponds to this symbol. This is the index of this symbol
|
|
in all the symbols for which we are making plt entries. The
|
|
first entry in the procedure linkage table is reserved. */
|
|
plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
|
|
|
|
/* Get the offset into the .got table of the entry that
|
|
corresponds to this function. Each .got entry is 4 bytes.
|
|
The first three are reserved. */
|
|
got_offset = (plt_index + 3) * 4;
|
|
|
|
/* Fill in the entry in the procedure linkage table. */
|
|
if (! info->shared)
|
|
{
|
|
/* TODO */
|
|
}
|
|
else
|
|
{
|
|
/* TODO */
|
|
}
|
|
|
|
/* Fill in the entry in the global offset table. */
|
|
bfd_put_32 (output_bfd,
|
|
(splt->output_section->vma
|
|
+ splt->output_offset
|
|
+ h->plt.offset
|
|
+ 12), /* same offset */
|
|
sgot->contents + got_offset);
|
|
|
|
/* Fill in the entry in the .rela.plt section. */
|
|
rela.r_offset = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ got_offset);
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_JMP_SLOT);
|
|
rela.r_addend = 0;
|
|
loc = srela->contents;
|
|
loc += plt_index * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
|
|
|
if (!h->def_regular)
|
|
{
|
|
/* Mark the symbol as undefined, rather than as defined in
|
|
the .plt section. Leave the value alone. */
|
|
sym->st_shndx = SHN_UNDEF;
|
|
}
|
|
|
|
}
|
|
|
|
if (h->got.offset != (bfd_vma) -1)
|
|
{
|
|
asection *sgot;
|
|
asection *srela;
|
|
Elf_Internal_Rela rela;
|
|
|
|
/* This symbol has an entry in the global offset table. Set it
|
|
up. */
|
|
sgot = htab->sgot;
|
|
srela = htab->srelgot;
|
|
BFD_ASSERT (sgot != NULL && srela != NULL);
|
|
|
|
rela.r_offset = (sgot->output_section->vma
|
|
+ sgot->output_offset
|
|
+ (h->got.offset &~ 1));
|
|
|
|
/* If this is a -Bsymbolic link, and the symbol is defined
|
|
locally, we just want to emit a RELATIVE reloc. Likewise if
|
|
the symbol was forced to be local because of a version file.
|
|
The entry in the global offset table will already have been
|
|
initialized in the relocate_section function. */
|
|
if (info->shared
|
|
&& (info->symbolic
|
|
|| h->dynindx == -1
|
|
|| h->forced_local)
|
|
&& h->def_regular)
|
|
{
|
|
rela.r_info = ELF32_R_INFO (0, R_LM32_RELATIVE);
|
|
rela.r_addend = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
}
|
|
else
|
|
{
|
|
BFD_ASSERT ((h->got.offset & 1) == 0);
|
|
bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_GLOB_DAT);
|
|
rela.r_addend = 0;
|
|
}
|
|
|
|
loc = srela->contents;
|
|
loc += srela->reloc_count * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
|
++srela->reloc_count;
|
|
}
|
|
|
|
if (h->needs_copy)
|
|
{
|
|
asection *s;
|
|
Elf_Internal_Rela rela;
|
|
|
|
/* This symbols needs a copy reloc. Set it up. */
|
|
BFD_ASSERT (h->dynindx != -1
|
|
&& (h->root.type == bfd_link_hash_defined
|
|
|| h->root.type == bfd_link_hash_defweak));
|
|
|
|
s = bfd_get_linker_section (htab->root.dynobj, ".rela.bss");
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
rela.r_offset = (h->root.u.def.value
|
|
+ h->root.u.def.section->output_section->vma
|
|
+ h->root.u.def.section->output_offset);
|
|
rela.r_info = ELF32_R_INFO (h->dynindx, R_LM32_COPY);
|
|
rela.r_addend = 0;
|
|
loc = s->contents;
|
|
loc += s->reloc_count * sizeof (Elf32_External_Rela);
|
|
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
|
++s->reloc_count;
|
|
}
|
|
|
|
/* Mark some specially defined symbols as absolute. */
|
|
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
|
|| h == htab->root.hgot)
|
|
sym->st_shndx = SHN_ABS;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static enum elf_reloc_type_class
|
|
lm32_elf_reloc_type_class (const Elf_Internal_Rela *rela)
|
|
{
|
|
switch ((int) ELF32_R_TYPE (rela->r_info))
|
|
{
|
|
case R_LM32_RELATIVE: return reloc_class_relative;
|
|
case R_LM32_JMP_SLOT: return reloc_class_plt;
|
|
case R_LM32_COPY: return reloc_class_copy;
|
|
default: return reloc_class_normal;
|
|
}
|
|
}
|
|
|
|
/* Adjust a symbol defined by a dynamic object and referenced by a
|
|
regular object. The current definition is in some section of the
|
|
dynamic object, but we're not including those sections. We have to
|
|
change the definition to something the rest of the link can
|
|
understand. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *h)
|
|
{
|
|
struct elf_lm32_link_hash_table *htab;
|
|
struct elf_lm32_link_hash_entry *eh;
|
|
struct elf_lm32_dyn_relocs *p;
|
|
bfd *dynobj;
|
|
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->u.weakdef != NULL
|
|
|| (h->def_dynamic
|
|
&& h->ref_regular
|
|
&& !h->def_regular)));
|
|
|
|
/* If this is a function, put it in the procedure linkage table. We
|
|
will fill in the contents of the procedure linkage table later,
|
|
when we know the address of the .got section. */
|
|
if (h->type == STT_FUNC
|
|
|| h->needs_plt)
|
|
{
|
|
if (! info->shared
|
|
&& !h->def_dynamic
|
|
&& !h->ref_dynamic
|
|
&& h->root.type != bfd_link_hash_undefweak
|
|
&& h->root.type != bfd_link_hash_undefined)
|
|
{
|
|
/* This case can occur if we saw a PLT reloc in an input
|
|
file, but the symbol was never referred to by a dynamic
|
|
object. In such a case, we don't actually need to build
|
|
a procedure linkage table, and we can just do a PCREL
|
|
reloc instead. */
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
h->plt.offset = (bfd_vma) -1;
|
|
|
|
/* 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->u.weakdef != NULL)
|
|
{
|
|
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
|
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
|
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
|
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
|
return TRUE;
|
|
}
|
|
|
|
/* This is a reference to a symbol defined by a dynamic object which
|
|
is not a function. */
|
|
|
|
/* If we are creating a shared library, we must presume that the
|
|
only references to the symbol are via the global offset table.
|
|
For such cases we need not do anything here; the relocations will
|
|
be handled correctly by relocate_section. */
|
|
if (info->shared)
|
|
return TRUE;
|
|
|
|
/* If there are no references to this symbol that do not use the
|
|
GOT, we don't need to generate a copy reloc. */
|
|
if (!h->non_got_ref)
|
|
return TRUE;
|
|
|
|
/* If -z nocopyreloc was given, we won't generate them either. */
|
|
if (info->nocopyreloc)
|
|
{
|
|
h->non_got_ref = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
eh = (struct elf_lm32_link_hash_entry *) h;
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
{
|
|
s = p->sec->output_section;
|
|
if (s != NULL && (s->flags & (SEC_READONLY | SEC_HAS_CONTENTS)) != 0)
|
|
break;
|
|
}
|
|
|
|
/* If we didn't find any dynamic relocs in sections which needs the
|
|
copy reloc, then we'll be keeping the dynamic relocs and avoiding
|
|
the copy reloc. */
|
|
if (p == NULL)
|
|
{
|
|
h->non_got_ref = 0;
|
|
return TRUE;
|
|
}
|
|
|
|
/* We must allocate the symbol in our .dynbss section, which will
|
|
become part of the .bss section of the executable. There will be
|
|
an entry for this symbol in the .dynsym section. The dynamic
|
|
object will contain position independent code, so all references
|
|
from the dynamic object to this symbol will go through the global
|
|
offset table. The dynamic linker will use the .dynsym entry to
|
|
determine the address it must put in the global offset table, so
|
|
both the dynamic object and the regular object will refer to the
|
|
same memory location for the variable. */
|
|
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
s = htab->sdynbss;
|
|
BFD_ASSERT (s != NULL);
|
|
|
|
/* We must generate a R_LM32_COPY reloc to tell the dynamic linker
|
|
to copy the initial value out of the dynamic object and into the
|
|
runtime process image. We need to remember the offset into the
|
|
.rela.bss section we are going to use. */
|
|
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
|
|
{
|
|
asection *srel;
|
|
|
|
srel = htab->srelbss;
|
|
BFD_ASSERT (srel != NULL);
|
|
srel->size += sizeof (Elf32_External_Rela);
|
|
h->needs_copy = 1;
|
|
}
|
|
|
|
return _bfd_elf_adjust_dynamic_copy (h, s);
|
|
}
|
|
|
|
/* Allocate space in .plt, .got and associated reloc sections for
|
|
dynamic relocs. */
|
|
|
|
static bfd_boolean
|
|
allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
|
|
{
|
|
struct bfd_link_info *info;
|
|
struct elf_lm32_link_hash_table *htab;
|
|
struct elf_lm32_link_hash_entry *eh;
|
|
struct elf_lm32_dyn_relocs *p;
|
|
|
|
if (h->root.type == bfd_link_hash_indirect)
|
|
return TRUE;
|
|
|
|
info = (struct bfd_link_info *) inf;
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
eh = (struct elf_lm32_link_hash_entry *) h;
|
|
|
|
if (htab->root.dynamic_sections_created
|
|
&& h->plt.refcount > 0)
|
|
{
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info->shared, h))
|
|
{
|
|
asection *s = htab->splt;
|
|
|
|
/* If this is the first .plt entry, make room for the special
|
|
first entry. */
|
|
if (s->size == 0)
|
|
s->size += PLT_ENTRY_SIZE;
|
|
|
|
h->plt.offset = s->size;
|
|
|
|
/* If this symbol is not defined in a regular file, and we are
|
|
not generating a shared library, then set the symbol to this
|
|
location in the .plt. This is required to make function
|
|
pointers compare as equal between the normal executable and
|
|
the shared library. */
|
|
if (! info->shared
|
|
&& !h->def_regular)
|
|
{
|
|
h->root.u.def.section = s;
|
|
h->root.u.def.value = h->plt.offset;
|
|
}
|
|
|
|
/* Make room for this entry. */
|
|
s->size += PLT_ENTRY_SIZE;
|
|
|
|
/* We also need to make an entry in the .got.plt section, which
|
|
will be placed in the .got section by the linker script. */
|
|
htab->sgotplt->size += 4;
|
|
|
|
/* We also need to make an entry in the .rel.plt section. */
|
|
htab->srelplt->size += sizeof (Elf32_External_Rela);
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
h->plt.offset = (bfd_vma) -1;
|
|
h->needs_plt = 0;
|
|
}
|
|
|
|
if (h->got.refcount > 0)
|
|
{
|
|
asection *s;
|
|
bfd_boolean dyn;
|
|
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
s = htab->sgot;
|
|
|
|
h->got.offset = s->size;
|
|
s->size += 4;
|
|
dyn = htab->root.dynamic_sections_created;
|
|
if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h))
|
|
htab->srelgot->size += sizeof (Elf32_External_Rela);
|
|
}
|
|
else
|
|
h->got.offset = (bfd_vma) -1;
|
|
|
|
if (eh->dyn_relocs == NULL)
|
|
return TRUE;
|
|
|
|
/* In the shared -Bsymbolic case, discard space allocated for
|
|
dynamic pc-relative relocs against symbols which turn out to be
|
|
defined in regular objects. For the normal shared case, discard
|
|
space for pc-relative relocs that have become local due to symbol
|
|
visibility changes. */
|
|
|
|
if (info->shared)
|
|
{
|
|
if (h->def_regular
|
|
&& (h->forced_local
|
|
|| info->symbolic))
|
|
{
|
|
struct elf_lm32_dyn_relocs **pp;
|
|
|
|
for (pp = &eh->dyn_relocs; (p = *pp) != NULL;)
|
|
{
|
|
p->count -= p->pc_count;
|
|
p->pc_count = 0;
|
|
if (p->count == 0)
|
|
*pp = p->next;
|
|
else
|
|
pp = &p->next;
|
|
}
|
|
}
|
|
|
|
/* Also discard relocs on undefined weak syms with non-default
|
|
visibility. */
|
|
if (eh->dyn_relocs != NULL
|
|
&& h->root.type == bfd_link_hash_undefweak)
|
|
{
|
|
if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
|
|
eh->dyn_relocs = NULL;
|
|
|
|
/* Make sure undefined weak symbols are output as a dynamic
|
|
symbol in PIEs. */
|
|
else if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* For the non-shared case, discard space for relocs against
|
|
symbols which turn out to need copy relocs or are not
|
|
dynamic. */
|
|
|
|
if (!h->non_got_ref
|
|
&& ((h->def_dynamic
|
|
&& !h->def_regular)
|
|
|| (htab->root.dynamic_sections_created
|
|
&& (h->root.type == bfd_link_hash_undefweak
|
|
|| h->root.type == bfd_link_hash_undefined))))
|
|
{
|
|
/* Make sure this symbol is output as a dynamic symbol.
|
|
Undefined weak syms won't yet be marked as dynamic. */
|
|
if (h->dynindx == -1
|
|
&& !h->forced_local)
|
|
{
|
|
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
/* If that succeeded, we know we'll be keeping all the
|
|
relocs. */
|
|
if (h->dynindx != -1)
|
|
goto keep;
|
|
}
|
|
|
|
eh->dyn_relocs = NULL;
|
|
|
|
keep: ;
|
|
}
|
|
|
|
/* Finally, allocate space. */
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
{
|
|
asection *sreloc = elf_section_data (p->sec)->sreloc;
|
|
sreloc->size += p->count * sizeof (Elf32_External_Rela);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Find any dynamic relocs that apply to read-only sections. */
|
|
|
|
static bfd_boolean
|
|
readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
|
|
{
|
|
struct elf_lm32_link_hash_entry *eh;
|
|
struct elf_lm32_dyn_relocs *p;
|
|
|
|
eh = (struct elf_lm32_link_hash_entry *) h;
|
|
for (p = eh->dyn_relocs; p != NULL; p = p->next)
|
|
{
|
|
asection *s = p->sec->output_section;
|
|
|
|
if (s != NULL && (s->flags & SEC_READONLY) != 0)
|
|
{
|
|
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
|
|
|
info->flags |= DF_TEXTREL;
|
|
|
|
/* Not an error, just cut short the traversal. */
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
/* Set the sizes of the dynamic sections. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_size_dynamic_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_lm32_link_hash_table *htab;
|
|
bfd *dynobj;
|
|
asection *s;
|
|
bfd_boolean relocs;
|
|
bfd *ibfd;
|
|
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
dynobj = htab->root.dynobj;
|
|
BFD_ASSERT (dynobj != NULL);
|
|
|
|
if (htab->root.dynamic_sections_created)
|
|
{
|
|
/* Set the contents of the .interp section to the interpreter. */
|
|
if (info->executable)
|
|
{
|
|
s = bfd_get_linker_section (dynobj, ".interp");
|
|
BFD_ASSERT (s != NULL);
|
|
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
|
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
|
}
|
|
}
|
|
|
|
/* Set up .got offsets for local syms, and space for local dynamic
|
|
relocs. */
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
|
{
|
|
bfd_signed_vma *local_got;
|
|
bfd_signed_vma *end_local_got;
|
|
bfd_size_type locsymcount;
|
|
Elf_Internal_Shdr *symtab_hdr;
|
|
asection *srel;
|
|
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
|
|
continue;
|
|
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
|
{
|
|
struct elf_lm32_dyn_relocs *p;
|
|
|
|
for (p = ((struct elf_lm32_dyn_relocs *)
|
|
elf_section_data (s)->local_dynrel);
|
|
p != NULL;
|
|
p = p->next)
|
|
{
|
|
if (! bfd_is_abs_section (p->sec)
|
|
&& bfd_is_abs_section (p->sec->output_section))
|
|
{
|
|
/* Input section has been discarded, either because
|
|
it is a copy of a linkonce section or due to
|
|
linker script /DISCARD/, so we'll be discarding
|
|
the relocs too. */
|
|
}
|
|
else if (p->count != 0)
|
|
{
|
|
srel = elf_section_data (p->sec)->sreloc;
|
|
srel->size += p->count * sizeof (Elf32_External_Rela);
|
|
if ((p->sec->output_section->flags & SEC_READONLY) != 0)
|
|
info->flags |= DF_TEXTREL;
|
|
}
|
|
}
|
|
}
|
|
|
|
local_got = elf_local_got_refcounts (ibfd);
|
|
if (!local_got)
|
|
continue;
|
|
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
|
locsymcount = symtab_hdr->sh_info;
|
|
end_local_got = local_got + locsymcount;
|
|
s = htab->sgot;
|
|
srel = htab->srelgot;
|
|
for (; local_got < end_local_got; ++local_got)
|
|
{
|
|
if (*local_got > 0)
|
|
{
|
|
*local_got = s->size;
|
|
s->size += 4;
|
|
if (info->shared)
|
|
srel->size += sizeof (Elf32_External_Rela);
|
|
}
|
|
else
|
|
*local_got = (bfd_vma) -1;
|
|
}
|
|
}
|
|
|
|
/* Allocate global sym .plt and .got entries, and space for global
|
|
sym dynamic relocs. */
|
|
elf_link_hash_traverse (&htab->root, allocate_dynrelocs, info);
|
|
|
|
/* We now have determined the sizes of the various dynamic sections.
|
|
Allocate memory for them. */
|
|
relocs = FALSE;
|
|
for (s = dynobj->sections; s != NULL; s = s->next)
|
|
{
|
|
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
|
continue;
|
|
|
|
if (s == htab->splt
|
|
|| s == htab->sgot
|
|
|| s == htab->sgotplt
|
|
|| s == htab->sdynbss)
|
|
{
|
|
/* Strip this section if we don't need it; see the
|
|
comment below. */
|
|
}
|
|
else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
|
|
{
|
|
if (s->size != 0 && s != htab->srelplt)
|
|
relocs = TRUE;
|
|
|
|
/* We use the reloc_count field as a counter if we need
|
|
to copy relocs into the output file. */
|
|
s->reloc_count = 0;
|
|
}
|
|
else
|
|
/* It's not one of our sections, so don't allocate space. */
|
|
continue;
|
|
|
|
if (s->size == 0)
|
|
{
|
|
/* If we don't need this section, strip it from the
|
|
output file. This is mostly to handle .rela.bss and
|
|
.rela.plt. We must create both sections in
|
|
create_dynamic_sections, because they must be created
|
|
before the linker maps input sections to output
|
|
sections. The linker does that before
|
|
adjust_dynamic_symbol is called, and it is that
|
|
function which decides whether anything needs to go
|
|
into these sections. */
|
|
s->flags |= SEC_EXCLUDE;
|
|
continue;
|
|
}
|
|
|
|
if ((s->flags & SEC_HAS_CONTENTS) == 0)
|
|
continue;
|
|
|
|
/* Allocate memory for the section contents. We use bfd_zalloc
|
|
here in case unused entries are not reclaimed before the
|
|
section's contents are written out. This should not happen,
|
|
but this way if it does, we get a R_LM32_NONE reloc instead
|
|
of garbage. */
|
|
s->contents = bfd_zalloc (dynobj, s->size);
|
|
if (s->contents == NULL)
|
|
return FALSE;
|
|
}
|
|
|
|
if (htab->root.dynamic_sections_created)
|
|
{
|
|
/* Add some entries to the .dynamic section. We fill in the
|
|
values later, in lm32_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. */
|
|
#define add_dynamic_entry(TAG, VAL) \
|
|
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
|
|
|
if (info->executable)
|
|
{
|
|
if (! add_dynamic_entry (DT_DEBUG, 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (htab->splt->size != 0)
|
|
{
|
|
if (! add_dynamic_entry (DT_PLTGOT, 0)
|
|
|| ! add_dynamic_entry (DT_PLTRELSZ, 0)
|
|
|| ! add_dynamic_entry (DT_PLTREL, DT_RELA)
|
|
|| ! add_dynamic_entry (DT_JMPREL, 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (relocs)
|
|
{
|
|
if (! add_dynamic_entry (DT_RELA, 0)
|
|
|| ! add_dynamic_entry (DT_RELASZ, 0)
|
|
|| ! add_dynamic_entry (DT_RELAENT,
|
|
sizeof (Elf32_External_Rela)))
|
|
return FALSE;
|
|
|
|
/* If any dynamic relocs apply to a read-only section,
|
|
then we need a DT_TEXTREL entry. */
|
|
if ((info->flags & DF_TEXTREL) == 0)
|
|
elf_link_hash_traverse (&htab->root, readonly_dynrelocs,
|
|
info);
|
|
|
|
if ((info->flags & DF_TEXTREL) != 0)
|
|
{
|
|
if (! add_dynamic_entry (DT_TEXTREL, 0))
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
#undef add_dynamic_entry
|
|
|
|
/* Allocate .rofixup section. */
|
|
if (IS_FDPIC (output_bfd))
|
|
{
|
|
struct weak_symbol_list *list_start = NULL, *list_end = NULL;
|
|
int rgot_weak_count = 0;
|
|
int r32_count = 0;
|
|
int rgot_count = 0;
|
|
/* Look for deleted sections. */
|
|
for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
|
|
{
|
|
for (s = ibfd->sections; s != NULL; s = s->next)
|
|
{
|
|
if (s->reloc_count)
|
|
{
|
|
/* Count relocs that need .rofixup entires. */
|
|
Elf_Internal_Rela *internal_relocs, *end;
|
|
internal_relocs = elf_section_data (s)->relocs;
|
|
if (internal_relocs == NULL)
|
|
internal_relocs = (_bfd_elf_link_read_relocs (ibfd, s, NULL, NULL, FALSE));
|
|
if (internal_relocs != NULL)
|
|
{
|
|
end = internal_relocs + s->reloc_count;
|
|
while (internal_relocs < end)
|
|
{
|
|
Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
|
struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
|
|
unsigned long r_symndx;
|
|
struct elf_link_hash_entry *h;
|
|
|
|
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
|
|
sym_hashes = elf_sym_hashes (ibfd);
|
|
r_symndx = ELF32_R_SYM (internal_relocs->r_info);
|
|
h = NULL;
|
|
if (r_symndx < symtab_hdr->sh_info)
|
|
{
|
|
}
|
|
else
|
|
{
|
|
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
}
|
|
|
|
/* Don't generate entries for weak symbols. */
|
|
if (!h || (h && h->root.type != bfd_link_hash_undefweak))
|
|
{
|
|
if (!discarded_section (s) && !((bfd_get_section_flags (ibfd, s) & SEC_ALLOC) == 0))
|
|
{
|
|
switch (ELF32_R_TYPE (internal_relocs->r_info))
|
|
{
|
|
case R_LM32_32:
|
|
r32_count++;
|
|
break;
|
|
case R_LM32_16_GOT:
|
|
rgot_count++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
struct weak_symbol_list *current, *new_entry;
|
|
/* Is this symbol already in the list? */
|
|
for (current = list_start; current; current = current->next)
|
|
{
|
|
if (!strcmp (current->name, h->root.root.string))
|
|
break;
|
|
}
|
|
if (!current && !discarded_section (s) && (bfd_get_section_flags (ibfd, s) & SEC_ALLOC))
|
|
{
|
|
/* Will this have an entry in the GOT. */
|
|
if (ELF32_R_TYPE (internal_relocs->r_info) == R_LM32_16_GOT)
|
|
{
|
|
/* Create a new entry. */
|
|
new_entry = malloc (sizeof (struct weak_symbol_list));
|
|
if (!new_entry)
|
|
return FALSE;
|
|
new_entry->name = h->root.root.string;
|
|
new_entry->next = NULL;
|
|
/* Add to list */
|
|
if (list_start == NULL)
|
|
{
|
|
list_start = new_entry;
|
|
list_end = new_entry;
|
|
}
|
|
else
|
|
{
|
|
list_end->next = new_entry;
|
|
list_end = new_entry;
|
|
}
|
|
/* Increase count of undefined weak symbols in the got. */
|
|
rgot_weak_count++;
|
|
}
|
|
}
|
|
}
|
|
internal_relocs++;
|
|
}
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
/* Free list. */
|
|
while (list_start)
|
|
{
|
|
list_end = list_start->next;
|
|
free (list_start);
|
|
list_start = list_end;
|
|
}
|
|
|
|
/* Size sections. */
|
|
lm32fdpic_fixup32_section (info)->size = (r32_count + (htab->sgot->size / 4) - rgot_weak_count + 1) * 4;
|
|
if (lm32fdpic_fixup32_section (info)->size == 0)
|
|
lm32fdpic_fixup32_section (info)->flags |= SEC_EXCLUDE;
|
|
else
|
|
{
|
|
lm32fdpic_fixup32_section (info)->contents =
|
|
bfd_zalloc (dynobj, lm32fdpic_fixup32_section (info)->size);
|
|
if (lm32fdpic_fixup32_section (info)->contents == NULL)
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Create dynamic sections when linking against a dynamic object. */
|
|
|
|
static bfd_boolean
|
|
lm32_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
|
|
{
|
|
struct elf_lm32_link_hash_table *htab;
|
|
flagword flags, pltflags;
|
|
asection *s;
|
|
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
|
int ptralign = 2; /* 32bit */
|
|
|
|
htab = lm32_elf_hash_table (info);
|
|
if (htab == NULL)
|
|
return FALSE;
|
|
|
|
/* Make sure we have a GOT - For the case where we have a dynamic object
|
|
but none of the relocs in check_relocs */
|
|
if (! create_got_section (abfd, info))
|
|
return FALSE;
|
|
if (IS_FDPIC (abfd) && (htab->sfixup32 == NULL))
|
|
{
|
|
if (! create_rofixup_section (abfd, info))
|
|
return FALSE;
|
|
}
|
|
|
|
/* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
|
|
.rel[a].bss sections. */
|
|
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
|
| SEC_LINKER_CREATED);
|
|
|
|
pltflags = flags;
|
|
pltflags |= SEC_CODE;
|
|
if (bed->plt_not_loaded)
|
|
pltflags &= ~ (SEC_LOAD | SEC_HAS_CONTENTS);
|
|
if (bed->plt_readonly)
|
|
pltflags |= SEC_READONLY;
|
|
|
|
s = bfd_make_section_anyway_with_flags (abfd, ".plt", pltflags);
|
|
htab->splt = s;
|
|
if (s == NULL
|
|
|| ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
|
|
return FALSE;
|
|
|
|
if (bed->want_plt_sym)
|
|
{
|
|
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
|
|
.plt section. */
|
|
struct bfd_link_hash_entry *bh = NULL;
|
|
struct elf_link_hash_entry *h;
|
|
|
|
if (! (_bfd_generic_link_add_one_symbol
|
|
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s,
|
|
(bfd_vma) 0, NULL, FALSE,
|
|
get_elf_backend_data (abfd)->collect, &bh)))
|
|
return FALSE;
|
|
h = (struct elf_link_hash_entry *) bh;
|
|
h->def_regular = 1;
|
|
h->type = STT_OBJECT;
|
|
htab->root.hplt = h;
|
|
|
|
if (info->shared
|
|
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
|
|
return FALSE;
|
|
}
|
|
|
|
s = bfd_make_section_anyway_with_flags (abfd,
|
|
bed->default_use_rela_p
|
|
? ".rela.plt" : ".rel.plt",
|
|
flags | SEC_READONLY);
|
|
htab->srelplt = s;
|
|
if (s == NULL
|
|
|| ! bfd_set_section_alignment (abfd, s, ptralign))
|
|
return FALSE;
|
|
|
|
if (htab->sgot == NULL
|
|
&& ! create_got_section (abfd, info))
|
|
return FALSE;
|
|
|
|
if (bed->want_dynbss)
|
|
{
|
|
/* The .dynbss section is a place to put symbols which are defined
|
|
by dynamic objects, are referenced by regular objects, and are
|
|
not functions. We must allocate space for them in the process
|
|
image and use a R_*_COPY reloc to tell the dynamic linker to
|
|
initialize them at run time. The linker script puts the .dynbss
|
|
section into the .bss section of the final image. */
|
|
s = bfd_make_section_anyway_with_flags (abfd, ".dynbss",
|
|
SEC_ALLOC | SEC_LINKER_CREATED);
|
|
htab->sdynbss = s;
|
|
if (s == NULL)
|
|
return FALSE;
|
|
/* The .rel[a].bss section holds copy relocs. This section is not
|
|
normally needed. We need to create it here, though, so that the
|
|
linker will map it to an output section. We can't just create it
|
|
only if we need it, because we will not know whether we need it
|
|
until we have seen all the input files, and the first time the
|
|
main linker code calls BFD after examining all the input files
|
|
(size_dynamic_sections) the input sections have already been
|
|
mapped to the output sections. If the section turns out not to
|
|
be needed, we can discard it later. We will never need this
|
|
section when generating a shared object, since they do not use
|
|
copy relocs. */
|
|
if (! info->shared)
|
|
{
|
|
s = bfd_make_section_anyway_with_flags (abfd,
|
|
(bed->default_use_rela_p
|
|
? ".rela.bss" : ".rel.bss"),
|
|
flags | SEC_READONLY);
|
|
htab->srelbss = s;
|
|
if (s == NULL
|
|
|| ! bfd_set_section_alignment (abfd, s, ptralign))
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/* Copy the extra info we tack onto an elf_link_hash_entry. */
|
|
|
|
static void
|
|
lm32_elf_copy_indirect_symbol (struct bfd_link_info *info,
|
|
struct elf_link_hash_entry *dir,
|
|
struct elf_link_hash_entry *ind)
|
|
{
|
|
struct elf_lm32_link_hash_entry * edir;
|
|
struct elf_lm32_link_hash_entry * eind;
|
|
|
|
edir = (struct elf_lm32_link_hash_entry *) dir;
|
|
eind = (struct elf_lm32_link_hash_entry *) ind;
|
|
|
|
if (eind->dyn_relocs != NULL)
|
|
{
|
|
if (edir->dyn_relocs != NULL)
|
|
{
|
|
struct elf_lm32_dyn_relocs **pp;
|
|
struct elf_lm32_dyn_relocs *p;
|
|
|
|
/* Add reloc counts against the indirect sym to the direct sym
|
|
list. Merge any entries against the same section. */
|
|
for (pp = &eind->dyn_relocs; (p = *pp) != NULL;)
|
|
{
|
|
struct elf_lm32_dyn_relocs *q;
|
|
|
|
for (q = edir->dyn_relocs; q != NULL; q = q->next)
|
|
if (q->sec == p->sec)
|
|
{
|
|
q->pc_count += p->pc_count;
|
|
q->count += p->count;
|
|
*pp = p->next;
|
|
break;
|
|
}
|
|
if (q == NULL)
|
|
pp = &p->next;
|
|
}
|
|
*pp = edir->dyn_relocs;
|
|
}
|
|
|
|
edir->dyn_relocs = eind->dyn_relocs;
|
|
eind->dyn_relocs = NULL;
|
|
}
|
|
|
|
_bfd_elf_link_hash_copy_indirect (info, dir, ind);
|
|
}
|
|
|
|
static bfd_boolean
|
|
lm32_elf_always_size_sections (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
if (!info->relocatable)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
|
|
/* Force a PT_GNU_STACK segment to be created. */
|
|
if (! elf_tdata (output_bfd)->stack_flags)
|
|
elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
|
|
|
|
/* Define __stacksize if it's not defined yet. */
|
|
h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
|
|
FALSE, FALSE, FALSE);
|
|
if (! h || h->root.type != bfd_link_hash_defined
|
|
|| h->type != STT_OBJECT
|
|
|| !h->def_regular)
|
|
{
|
|
struct bfd_link_hash_entry *bh = NULL;
|
|
|
|
if (!(_bfd_generic_link_add_one_symbol
|
|
(info, output_bfd, "__stacksize",
|
|
BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
|
|
(const char *) NULL, FALSE,
|
|
get_elf_backend_data (output_bfd)->collect, &bh)))
|
|
return FALSE;
|
|
|
|
h = (struct elf_link_hash_entry *) bh;
|
|
h->def_regular = 1;
|
|
h->type = STT_OBJECT;
|
|
/* This one must NOT be hidden. */
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
lm32_elf_modify_segment_map (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_segment_map *m;
|
|
|
|
/* objcopy and strip preserve what's already there using elf32_lm32fdpic_copy_
|
|
private_bfd_data (). */
|
|
if (! info)
|
|
return TRUE;
|
|
|
|
for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
|
|
if (m->p_type == PT_GNU_STACK)
|
|
break;
|
|
|
|
if (m)
|
|
{
|
|
asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
|
|
struct elf_link_hash_entry *h;
|
|
|
|
if (sec)
|
|
{
|
|
/* Obtain the pointer to the __stacksize symbol. */
|
|
h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
|
|
FALSE, FALSE, FALSE);
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *)h->root.u.i.link;
|
|
BFD_ASSERT (h->root.type == bfd_link_hash_defined);
|
|
|
|
/* Set the section size from the symbol value. We
|
|
intentionally ignore the symbol section. */
|
|
if (h->root.type == bfd_link_hash_defined)
|
|
sec->size = h->root.u.def.value;
|
|
else
|
|
sec->size = DEFAULT_STACK_SIZE;
|
|
|
|
/* Add the stack section to the PT_GNU_STACK segment,
|
|
such that its size and alignment requirements make it
|
|
to the segment. */
|
|
m->sections[m->count] = sec;
|
|
m->count++;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static bfd_boolean
|
|
lm32_elf_modify_program_headers (bfd *output_bfd,
|
|
struct bfd_link_info *info)
|
|
{
|
|
struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
|
|
struct elf_segment_map *m;
|
|
Elf_Internal_Phdr *p;
|
|
|
|
if (! info)
|
|
return TRUE;
|
|
|
|
for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
|
|
if (m->p_type == PT_GNU_STACK)
|
|
break;
|
|
|
|
if (m)
|
|
{
|
|
struct elf_link_hash_entry *h;
|
|
|
|
/* Obtain the pointer to the __stacksize symbol. */
|
|
h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
|
|
FALSE, FALSE, FALSE);
|
|
if (h)
|
|
{
|
|
while (h->root.type == bfd_link_hash_indirect
|
|
|| h->root.type == bfd_link_hash_warning)
|
|
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
|
BFD_ASSERT (h->root.type == bfd_link_hash_defined);
|
|
}
|
|
|
|
/* Set the header p_memsz from the symbol value. We
|
|
intentionally ignore the symbol section. */
|
|
if (h && h->root.type == bfd_link_hash_defined)
|
|
p->p_memsz = h->root.u.def.value;
|
|
else
|
|
p->p_memsz = DEFAULT_STACK_SIZE;
|
|
|
|
p->p_align = 8;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static bfd_boolean
|
|
lm32_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
|
{
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
|
return TRUE;
|
|
|
|
BFD_ASSERT (!elf_flags_init (obfd)
|
|
|| elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
|
|
|
|
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
|
elf_flags_init (obfd) = TRUE;
|
|
|
|
/* Copy object attributes. */
|
|
_bfd_elf_copy_obj_attributes (ibfd, obfd);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static bfd_boolean
|
|
lm32_elf_fdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
|
{
|
|
unsigned i;
|
|
|
|
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
|
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
|
return TRUE;
|
|
|
|
if (! lm32_elf_copy_private_bfd_data (ibfd, obfd))
|
|
return FALSE;
|
|
|
|
if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
|
|
|| ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
|
|
return TRUE;
|
|
|
|
/* Copy the stack size. */
|
|
for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
|
|
if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
|
|
{
|
|
Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
|
|
|
|
for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
|
|
if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
|
|
{
|
|
memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
|
|
|
|
/* Rewrite the phdrs, since we're only called after they were first written. */
|
|
if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
|
|
->s->sizeof_ehdr, SEEK_SET) != 0
|
|
|| get_elf_backend_data (obfd)->s->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
|
|
elf_elfheader (obfd)->e_phnum) != 0)
|
|
return FALSE;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
#define ELF_ARCH bfd_arch_lm32
|
|
#define ELF_TARGET_ID LM32_ELF_DATA
|
|
#define ELF_MACHINE_CODE EM_LATTICEMICO32
|
|
#define ELF_MAXPAGESIZE 0x1000
|
|
|
|
#define TARGET_BIG_SYM bfd_elf32_lm32_vec
|
|
#define TARGET_BIG_NAME "elf32-lm32"
|
|
|
|
#define bfd_elf32_bfd_reloc_type_lookup lm32_reloc_type_lookup
|
|
#define bfd_elf32_bfd_reloc_name_lookup lm32_reloc_name_lookup
|
|
#define elf_info_to_howto lm32_info_to_howto_rela
|
|
#define elf_info_to_howto_rel 0
|
|
#define elf_backend_rela_normal 1
|
|
#define elf_backend_object_p lm32_elf_object_p
|
|
#define elf_backend_final_write_processing lm32_elf_final_write_processing
|
|
#define elf_backend_can_gc_sections 1
|
|
#define elf_backend_can_refcount 1
|
|
#define elf_backend_gc_mark_hook lm32_elf_gc_mark_hook
|
|
#define elf_backend_gc_sweep_hook lm32_elf_gc_sweep_hook
|
|
#define elf_backend_plt_readonly 1
|
|
#define elf_backend_want_got_plt 1
|
|
#define elf_backend_want_plt_sym 0
|
|
#define elf_backend_got_header_size 12
|
|
#define bfd_elf32_bfd_link_hash_table_create lm32_elf_link_hash_table_create
|
|
#define elf_backend_check_relocs lm32_elf_check_relocs
|
|
#define elf_backend_reloc_type_class lm32_elf_reloc_type_class
|
|
#define elf_backend_copy_indirect_symbol lm32_elf_copy_indirect_symbol
|
|
#define elf_backend_size_dynamic_sections lm32_elf_size_dynamic_sections
|
|
#define elf_backend_omit_section_dynsym ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
|
|
#define elf_backend_create_dynamic_sections lm32_elf_create_dynamic_sections
|
|
#define elf_backend_finish_dynamic_sections lm32_elf_finish_dynamic_sections
|
|
#define elf_backend_adjust_dynamic_symbol lm32_elf_adjust_dynamic_symbol
|
|
#define elf_backend_finish_dynamic_symbol lm32_elf_finish_dynamic_symbol
|
|
#define elf_backend_relocate_section lm32_elf_relocate_section
|
|
|
|
#include "elf32-target.h"
|
|
|
|
#undef ELF_MAXPAGESIZE
|
|
#define ELF_MAXPAGESIZE 0x4000
|
|
|
|
|
|
#undef TARGET_BIG_SYM
|
|
#define TARGET_BIG_SYM bfd_elf32_lm32fdpic_vec
|
|
#undef TARGET_BIG_NAME
|
|
#define TARGET_BIG_NAME "elf32-lm32fdpic"
|
|
#undef elf32_bed
|
|
#define elf32_bed elf32_lm32fdpic_bed
|
|
|
|
#undef elf_backend_always_size_sections
|
|
#define elf_backend_always_size_sections lm32_elf_always_size_sections
|
|
#undef elf_backend_modify_segment_map
|
|
#define elf_backend_modify_segment_map lm32_elf_modify_segment_map
|
|
#undef elf_backend_modify_program_headers
|
|
#define elf_backend_modify_program_headers lm32_elf_modify_program_headers
|
|
#undef bfd_elf32_bfd_copy_private_bfd_data
|
|
#define bfd_elf32_bfd_copy_private_bfd_data lm32_elf_fdpic_copy_private_bfd_data
|
|
|
|
#include "elf32-target.h"
|