/* 32-bit ELF support for ARM
- Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2019-2020 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#ifndef USE_REL
-#define USE_REL 0
-#endif
-
-typedef unsigned long int insn32;
-typedef unsigned short int insn16;
-
-static bfd_boolean elf32_arm_set_private_flags
- PARAMS ((bfd *, flagword));
-static bfd_boolean elf32_arm_copy_private_bfd_data
- PARAMS ((bfd *, bfd *));
-static bfd_boolean elf32_arm_merge_private_bfd_data
- PARAMS ((bfd *, bfd *));
-static bfd_boolean elf32_arm_print_private_bfd_data
- PARAMS ((bfd *, PTR));
-static int elf32_arm_get_symbol_type
- PARAMS (( Elf_Internal_Sym *, int));
-static struct bfd_link_hash_table *elf32_arm_link_hash_table_create
- PARAMS ((bfd *));
-static bfd_reloc_status_type elf32_arm_final_link_relocate
- PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *,
- const char *, int, struct elf_link_hash_entry *));
-static insn32 insert_thumb_branch
- PARAMS ((insn32, int));
-static struct elf_link_hash_entry *find_thumb_glue
- PARAMS ((struct bfd_link_info *, const char *, bfd *));
-static struct elf_link_hash_entry *find_arm_glue
- PARAMS ((struct bfd_link_info *, const char *, bfd *));
-static void elf32_arm_post_process_headers
- PARAMS ((bfd *, struct bfd_link_info *));
-static int elf32_arm_to_thumb_stub
- PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
- bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
-static int elf32_thumb_to_arm_stub
- PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
- bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
-static bfd_boolean elf32_arm_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-static asection * elf32_arm_gc_mark_hook
- PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-static bfd_boolean elf32_arm_gc_sweep_hook
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-static bfd_boolean elf32_arm_check_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-static bfd_boolean elf32_arm_find_nearest_line
- PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
- const char **, unsigned int *));
-static bfd_boolean elf32_arm_adjust_dynamic_symbol
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-static bfd_boolean elf32_arm_size_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static bfd_boolean elf32_arm_finish_dynamic_symbol
- PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
- Elf_Internal_Sym *));
-static bfd_boolean elf32_arm_finish_dynamic_sections
- PARAMS ((bfd *, struct bfd_link_info *));
-static struct bfd_hash_entry * elf32_arm_link_hash_newfunc
- PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-#if USE_REL
-static void arm_add_to_rel
- PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma));
-#endif
-static bfd_boolean allocate_dynrelocs
- PARAMS ((struct elf_link_hash_entry *h, PTR inf));
-static bfd_boolean create_got_section
- PARAMS ((bfd * dynobj, struct bfd_link_info * info));
-static bfd_boolean elf32_arm_create_dynamic_sections
- PARAMS ((bfd * dynobj, struct bfd_link_info * info));
-static enum elf_reloc_type_class elf32_arm_reloc_type_class
- PARAMS ((const Elf_Internal_Rela *));
-static bfd_boolean elf32_arm_object_p
- PARAMS ((bfd *));
-
-#ifndef ELFARM_NABI_C_INCLUDED
-static void record_arm_to_thumb_glue
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-static void record_thumb_to_arm_glue
- PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
-bfd_boolean bfd_elf32_arm_allocate_interworking_sections
- PARAMS ((struct bfd_link_info *));
-bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
- PARAMS ((bfd *, struct bfd_link_info *));
-bfd_boolean bfd_elf32_arm_process_before_allocation
- PARAMS ((bfd *, struct bfd_link_info *, int));
-#endif
-
-
-#define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
-
-/* The linker script knows the section names for placement.
- The entry_names are used to do simple name mangling on the stubs.
- Given a function name, and its type, the stub can be found. The
- name can be changed. The only requirement is the %s be present. */
-#define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
-#define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
-
-#define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
-#define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
-
-/* The name of the dynamic interpreter. This is put in the .interp
- section. */
-#define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
-
-#ifdef FOUR_WORD_PLT
-
-/* The size in bytes of the special first entry in the procedure
- linkage table. */
-#define PLT_HEADER_SIZE 16
-
-/* The size in bytes of an entry in the procedure linkage table. */
-#define PLT_ENTRY_SIZE 16
-
-/* The first entry in a procedure linkage table looks like
- this. It is set up so that any shared library function that is
- called before the relocation has been set up calls the dynamic
- linker first. */
-static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
- {
- 0xe52de004, /* str lr, [sp, #-4]! */
- 0xe59fe010, /* ldr lr, [pc, #16] */
- 0xe08fe00e, /* add lr, pc, lr */
- 0xe5bef008, /* ldr pc, [lr, #8]! */
- };
-
-/* Subsequent entries in a procedure linkage table look like
- this. */
-static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
- {
- 0xe28fc600, /* add ip, pc, #NN */
- 0xe28cca00, /* add ip, ip, #NN */
- 0xe5bcf000, /* ldr pc, [ip, #NN]! */
- 0x00000000, /* unused */
- };
-
-#else
-
-/* The size in bytes of the special first entry in the procedure
- linkage table. */
-#define PLT_HEADER_SIZE 20
-
-/* The size in bytes of an entry in the procedure linkage table. */
-#define PLT_ENTRY_SIZE 12
-
-/* The first entry in a procedure linkage table looks like
- this. It is set up so that any shared library function that is
- called before the relocation has been set up calls the dynamic
- linker first. */
-static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] =
- {
- 0xe52de004, /* str lr, [sp, #-4]! */
- 0xe59fe004, /* ldr lr, [pc, #4] */
- 0xe08fe00e, /* add lr, pc, lr */
- 0xe5bef008, /* ldr pc, [lr, #8]! */
- 0x00000000, /* &GOT[0] - . */
- };
-
-/* Subsequent entries in a procedure linkage table look like
- this. */
-static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
- {
- 0xe28fc600, /* add ip, pc, #0xNN00000 */
- 0xe28cca00, /* add ip, ip, #0xNN000 */
- 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */
- };
-
-#endif
-
-/* The ARM linker needs to keep track of the number of relocs that it
- decides to copy in check_relocs for each symbol. This is so that
- it can discard PC relative relocs if it doesn't need them when
- linking with -Bsymbolic. We store the information in a field
- extending the regular ELF linker hash table. */
-
-/* This structure keeps track of the number of PC relative relocs we
- have copied for a given symbol. */
-struct elf32_arm_relocs_copied
- {
- /* Next section. */
- struct elf32_arm_relocs_copied * next;
- /* A section in dynobj. */
- asection * section;
- /* Number of relocs copied in this section. */
- bfd_size_type count;
- };
-
-/* Arm ELF linker hash entry. */
-struct elf32_arm_link_hash_entry
- {
- struct elf_link_hash_entry root;
-
- /* Number of PC relative relocs copied for this symbol. */
- struct elf32_arm_relocs_copied * relocs_copied;
- };
-
-/* Traverse an arm ELF linker hash table. */
-#define elf32_arm_link_hash_traverse(table, func, info) \
- (elf_link_hash_traverse \
- (&(table)->root, \
- (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
- (info)))
-
-/* Get the ARM elf linker hash table from a link_info structure. */
-#define elf32_arm_hash_table(info) \
- ((struct elf32_arm_link_hash_table *) ((info)->hash))
-
-/* ARM ELF linker hash table. */
-struct elf32_arm_link_hash_table
- {
- /* The main hash table. */
- struct elf_link_hash_table root;
-
- /* The size in bytes of the section containing the Thumb-to-ARM glue. */
- bfd_size_type thumb_glue_size;
-
- /* The size in bytes of the section containing the ARM-to-Thumb glue. */
- bfd_size_type arm_glue_size;
-
- /* An arbitrary input BFD chosen to hold the glue sections. */
- bfd * bfd_of_glue_owner;
-
- /* A boolean indicating whether knowledge of the ARM's pipeline
- length should be applied by the linker. */
- int no_pipeline_knowledge;
-
- /* Short-cuts to get to dynamic linker sections. */
- asection *sgot;
- asection *sgotplt;
- asection *srelgot;
- asection *splt;
- asection *srelplt;
- asection *sdynbss;
- asection *srelbss;
-
- /* Small local sym to section mapping cache. */
- struct sym_sec_cache sym_sec;
- };
-
-/* Create an entry in an ARM ELF linker hash table. */
-
-static struct bfd_hash_entry *
-elf32_arm_link_hash_newfunc (entry, table, string)
- struct bfd_hash_entry * entry;
- struct bfd_hash_table * table;
- const char * string;
-{
- struct elf32_arm_link_hash_entry * ret =
- (struct elf32_arm_link_hash_entry *) entry;
-
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (ret == (struct elf32_arm_link_hash_entry *) NULL)
- ret = ((struct elf32_arm_link_hash_entry *)
- bfd_hash_allocate (table,
- sizeof (struct elf32_arm_link_hash_entry)));
- if (ret == (struct elf32_arm_link_hash_entry *) NULL)
- return (struct bfd_hash_entry *) ret;
-
- /* Call the allocation method of the superclass. */
- ret = ((struct elf32_arm_link_hash_entry *)
- _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
- table, string));
- if (ret != (struct elf32_arm_link_hash_entry *) NULL)
- ret->relocs_copied = NULL;
-
- return (struct bfd_hash_entry *) ret;
-}
-
-/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
- shortcuts to them in our hash table. */
-
-static bfd_boolean
-create_got_section (dynobj, info)
- bfd *dynobj;
- struct bfd_link_info *info;
-{
- struct elf32_arm_link_hash_table *htab;
-
- if (! _bfd_elf_create_got_section (dynobj, info))
- return FALSE;
-
- htab = elf32_arm_hash_table (info);
- htab->sgot = bfd_get_section_by_name (dynobj, ".got");
- htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
- if (!htab->sgot || !htab->sgotplt)
- abort ();
-
- htab->srelgot = bfd_make_section (dynobj, ".rel.got");
- if (htab->srelgot == NULL
- || ! bfd_set_section_flags (dynobj, htab->srelgot,
- (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY | SEC_LINKER_CREATED
- | SEC_READONLY))
- || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
- return FALSE;
- return TRUE;
-}
-
-/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
- .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
- hash table. */
-
-static bfd_boolean
-elf32_arm_create_dynamic_sections (dynobj, info)
- bfd *dynobj;
- struct bfd_link_info *info;
-{
- struct elf32_arm_link_hash_table *htab;
-
- htab = elf32_arm_hash_table (info);
- if (!htab->sgot && !create_got_section (dynobj, info))
- return FALSE;
-
- if (!_bfd_elf_create_dynamic_sections (dynobj, info))
- return FALSE;
-
- htab->splt = bfd_get_section_by_name (dynobj, ".plt");
- htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
- htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
- if (!info->shared)
- htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
-
- if (!htab->splt || !htab->srelplt || !htab->sdynbss
- || (!info->shared && !htab->srelbss))
- abort ();
-
- return TRUE;
-}
-
-/* Copy the extra info we tack onto an elf_link_hash_entry. */
-
-static void
-elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *ind)
-{
- struct elf32_arm_link_hash_entry *edir, *eind;
-
- edir = (struct elf32_arm_link_hash_entry *) dir;
- eind = (struct elf32_arm_link_hash_entry *) ind;
-
- if (eind->relocs_copied != NULL)
- {
- if (edir->relocs_copied != NULL)
- {
- struct elf32_arm_relocs_copied **pp;
- struct elf32_arm_relocs_copied *p;
-
- if (ind->root.type == bfd_link_hash_indirect)
- abort ();
-
- /* Add reloc counts against the weak sym to the strong sym
- list. Merge any entries against the same section. */
- for (pp = &eind->relocs_copied; (p = *pp) != NULL; )
- {
- struct elf32_arm_relocs_copied *q;
-
- for (q = edir->relocs_copied; q != NULL; q = q->next)
- if (q->section == p->section)
- {
- q->count += p->count;
- *pp = p->next;
- break;
- }
- if (q == NULL)
- pp = &p->next;
- }
- *pp = edir->relocs_copied;
- }
-
- edir->relocs_copied = eind->relocs_copied;
- eind->relocs_copied = NULL;
- }
-
- _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
-}
-
-/* Create an ARM elf linker hash table. */
-
-static struct bfd_link_hash_table *
-elf32_arm_link_hash_table_create (abfd)
- bfd *abfd;
-{
- struct elf32_arm_link_hash_table *ret;
- bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table);
-
- ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt);
- if (ret == (struct elf32_arm_link_hash_table *) NULL)
- return NULL;
-
- if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
- elf32_arm_link_hash_newfunc))
- {
- free (ret);
- return NULL;
- }
-
- ret->sgot = NULL;
- ret->sgotplt = NULL;
- ret->srelgot = NULL;
- ret->splt = NULL;
- ret->srelplt = NULL;
- ret->sdynbss = NULL;
- ret->srelbss = NULL;
- ret->thumb_glue_size = 0;
- ret->arm_glue_size = 0;
- ret->bfd_of_glue_owner = NULL;
- ret->no_pipeline_knowledge = 0;
- ret->sym_sec.abfd = NULL;
-
- return &ret->root.root;
-}
-
-/* Locate the Thumb encoded calling stub for NAME. */
-
-static struct elf_link_hash_entry *
-find_thumb_glue (link_info, name, input_bfd)
- struct bfd_link_info *link_info;
- const char *name;
- bfd *input_bfd;
-{
- char *tmp_name;
- struct elf_link_hash_entry *hash;
- struct elf32_arm_link_hash_table *hash_table;
-
- /* We need a pointer to the armelf specific hash table. */
- hash_table = elf32_arm_hash_table (link_info);
-
- tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
- + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
-
- BFD_ASSERT (tmp_name);
-
- sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
-
- hash = elf_link_hash_lookup
- (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
-
- if (hash == NULL)
- /* xgettext:c-format */
- (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"),
- bfd_archive_filename (input_bfd), tmp_name, name);
-
- free (tmp_name);
-
- return hash;
-}
-
-/* Locate the ARM encoded calling stub for NAME. */
-
-static struct elf_link_hash_entry *
-find_arm_glue (link_info, name, input_bfd)
- struct bfd_link_info *link_info;
- const char *name;
- bfd *input_bfd;
-{
- char *tmp_name;
- struct elf_link_hash_entry *myh;
- struct elf32_arm_link_hash_table *hash_table;
-
- /* We need a pointer to the elfarm specific hash table. */
- hash_table = elf32_arm_hash_table (link_info);
-
- tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
- + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
-
- BFD_ASSERT (tmp_name);
-
- sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
-
- myh = elf_link_hash_lookup
- (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
-
- if (myh == NULL)
- /* xgettext:c-format */
- (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"),
- bfd_archive_filename (input_bfd), tmp_name, name);
-
- free (tmp_name);
-
- return myh;
-}
-
-/* ARM->Thumb glue:
-
- .arm
- __func_from_arm:
- ldr r12, __func_addr
- bx r12
- __func_addr:
- .word func @ behave as if you saw a ARM_32 reloc. */
-
-#define ARM2THUMB_GLUE_SIZE 12
-static const insn32 a2t1_ldr_insn = 0xe59fc000;
-static const insn32 a2t2_bx_r12_insn = 0xe12fff1c;
-static const insn32 a2t3_func_addr_insn = 0x00000001;
-
-/* Thumb->ARM: Thumb->(non-interworking aware) ARM
-
- .thumb .thumb
- .align 2 .align 2
- __func_from_thumb: __func_from_thumb:
- bx pc push {r6, lr}
- nop ldr r6, __func_addr
- .arm mov lr, pc
- __func_change_to_arm: bx r6
- b func .arm
- __func_back_to_thumb:
- ldmia r13! {r6, lr}
- bx lr
- __func_addr:
- .word func */
-
-#define THUMB2ARM_GLUE_SIZE 8
-static const insn16 t2a1_bx_pc_insn = 0x4778;
-static const insn16 t2a2_noop_insn = 0x46c0;
-static const insn32 t2a3_b_insn = 0xea000000;
-
-#ifndef ELFARM_NABI_C_INCLUDED
-bfd_boolean
-bfd_elf32_arm_allocate_interworking_sections (info)
- struct bfd_link_info * info;
-{
- asection * s;
- bfd_byte * foo;
- struct elf32_arm_link_hash_table * globals;
-
- globals = elf32_arm_hash_table (info);
-
- BFD_ASSERT (globals != NULL);
-
- if (globals->arm_glue_size != 0)
- {
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
-
- s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
- ARM2THUMB_GLUE_SECTION_NAME);
-
- BFD_ASSERT (s != NULL);
-
- foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
- globals->arm_glue_size);
-
- s->_raw_size = s->_cooked_size = globals->arm_glue_size;
- s->contents = foo;
- }
-
- if (globals->thumb_glue_size != 0)
- {
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
-
- s = bfd_get_section_by_name
- (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
-
- BFD_ASSERT (s != NULL);
-
- foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner,
- globals->thumb_glue_size);
-
- s->_raw_size = s->_cooked_size = globals->thumb_glue_size;
- s->contents = foo;
- }
-
- return TRUE;
-}
-
-static void
-record_arm_to_thumb_glue (link_info, h)
- struct bfd_link_info * link_info;
- struct elf_link_hash_entry * h;
-{
- const char * name = h->root.root.string;
- asection * s;
- char * tmp_name;
- struct elf_link_hash_entry * myh;
- struct bfd_link_hash_entry * bh;
- struct elf32_arm_link_hash_table * globals;
- bfd_vma val;
-
- globals = elf32_arm_hash_table (link_info);
-
- BFD_ASSERT (globals != NULL);
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
-
- s = bfd_get_section_by_name
- (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME);
-
- BFD_ASSERT (s != NULL);
-
- tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
- + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1);
-
- BFD_ASSERT (tmp_name);
-
- sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
-
- myh = elf_link_hash_lookup
- (&(globals)->root, tmp_name, FALSE, FALSE, TRUE);
-
- if (myh != NULL)
- {
- /* We've already seen this guy. */
- free (tmp_name);
- return;
- }
-
- /* The only trick here is using hash_table->arm_glue_size as the value. Even
- though the section isn't allocated yet, this is where we will be putting
- it. */
- bh = NULL;
- val = globals->arm_glue_size + 1;
- _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner,
- tmp_name, BSF_GLOBAL, s, val,
- NULL, TRUE, FALSE, &bh);
-
- free (tmp_name);
-
- globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
-
- return;
-}
-
-static void
-record_thumb_to_arm_glue (link_info, h)
- struct bfd_link_info *link_info;
- struct elf_link_hash_entry *h;
-{
- const char *name = h->root.root.string;
- asection *s;
- char *tmp_name;
- struct elf_link_hash_entry *myh;
- struct bfd_link_hash_entry *bh;
- struct elf32_arm_link_hash_table *hash_table;
- char bind;
- bfd_vma val;
-
- hash_table = elf32_arm_hash_table (link_info);
-
- BFD_ASSERT (hash_table != NULL);
- BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL);
-
- s = bfd_get_section_by_name
- (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME);
-
- BFD_ASSERT (s != NULL);
-
- tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
- + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1);
-
- BFD_ASSERT (tmp_name);
-
- sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
-
- myh = elf_link_hash_lookup
- (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE);
-
- if (myh != NULL)
- {
- /* We've already seen this guy. */
- free (tmp_name);
- return;
- }
-
- bh = NULL;
- val = hash_table->thumb_glue_size + 1;
- _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
- tmp_name, BSF_GLOBAL, s, val,
- NULL, TRUE, FALSE, &bh);
-
- /* If we mark it 'Thumb', the disassembler will do a better job. */
- myh = (struct elf_link_hash_entry *) bh;
- bind = ELF_ST_BIND (myh->type);
- myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC);
-
- free (tmp_name);
-
-#define CHANGE_TO_ARM "__%s_change_to_arm"
-#define BACK_FROM_ARM "__%s_back_from_arm"
-
- /* Allocate another symbol to mark where we switch to Arm mode. */
- tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name)
- + strlen (CHANGE_TO_ARM) + 1);
-
- BFD_ASSERT (tmp_name);
-
- sprintf (tmp_name, CHANGE_TO_ARM, name);
-
- bh = NULL;
- val = hash_table->thumb_glue_size + 4,
- _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner,
- tmp_name, BSF_LOCAL, s, val,
- NULL, TRUE, FALSE, &bh);
-
- free (tmp_name);
-
- hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
-
- return;
-}
-
-/* Add the glue sections to ABFD. This function is called from the
- linker scripts in ld/emultempl/{armelf}.em. */
-
-bfd_boolean
-bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- flagword flags;
- asection *sec;
-
- /* If we are only performing a partial
- link do not bother adding the glue. */
- if (info->relocatable)
- return TRUE;
-
- sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME);
-
- if (sec == NULL)
- {
- /* Note: we do not include the flag SEC_LINKER_CREATED, as this
- will prevent elf_link_input_bfd() from processing the contents
- of this section. */
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
-
- sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME);
-
- if (sec == NULL
- || !bfd_set_section_flags (abfd, sec, flags)
- || !bfd_set_section_alignment (abfd, sec, 2))
- return FALSE;
-
- /* Set the gc mark to prevent the section from being removed by garbage
- collection, despite the fact that no relocs refer to this section. */
- sec->gc_mark = 1;
- }
-
- sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME);
-
- if (sec == NULL)
- {
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY;
-
- sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME);
-
- if (sec == NULL
- || !bfd_set_section_flags (abfd, sec, flags)
- || !bfd_set_section_alignment (abfd, sec, 2))
- return FALSE;
-
- sec->gc_mark = 1;
- }
-
- return TRUE;
-}
-
-/* Select a BFD to be used to hold the sections used by the glue code.
- This function is called from the linker scripts in ld/emultempl/
- {armelf/pe}.em */
-
-bfd_boolean
-bfd_elf32_arm_get_bfd_for_interworking (abfd, info)
- bfd *abfd;
- struct bfd_link_info *info;
-{
- struct elf32_arm_link_hash_table *globals;
-
- /* If we are only performing a partial link
- do not bother getting a bfd to hold the glue. */
- if (info->relocatable)
- return TRUE;
-
- globals = elf32_arm_hash_table (info);
-
- BFD_ASSERT (globals != NULL);
-
- if (globals->bfd_of_glue_owner != NULL)
- return TRUE;
-
- /* Save the bfd for later use. */
- globals->bfd_of_glue_owner = abfd;
-
- return TRUE;
-}
-
-bfd_boolean
-bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge)
- bfd *abfd;
- struct bfd_link_info *link_info;
- int no_pipeline_knowledge;
-{
- Elf_Internal_Shdr *symtab_hdr;
- Elf_Internal_Rela *internal_relocs = NULL;
- Elf_Internal_Rela *irel, *irelend;
- bfd_byte *contents = NULL;
-
- asection *sec;
- struct elf32_arm_link_hash_table *globals;
-
- /* If we are only performing a partial link do not bother
- to construct any glue. */
- if (link_info->relocatable)
- return TRUE;
-
- /* Here we have a bfd that is to be included on the link. We have a hook
- to do reloc rummaging, before section sizes are nailed down. */
- globals = elf32_arm_hash_table (link_info);
-
- BFD_ASSERT (globals != NULL);
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
-
- globals->no_pipeline_knowledge = no_pipeline_knowledge;
-
- /* Rummage around all the relocs and map the glue vectors. */
- sec = abfd->sections;
-
- if (sec == NULL)
- return TRUE;
-
- for (; sec != NULL; sec = sec->next)
- {
- if (sec->reloc_count == 0)
- continue;
-
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
-
- /* Load the relocs. */
- internal_relocs
- = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL, FALSE);
-
- if (internal_relocs == NULL)
- goto error_return;
-
- irelend = internal_relocs + sec->reloc_count;
- for (irel = internal_relocs; irel < irelend; irel++)
- {
- long r_type;
- unsigned long r_index;
-
- struct elf_link_hash_entry *h;
-
- r_type = ELF32_R_TYPE (irel->r_info);
- r_index = ELF32_R_SYM (irel->r_info);
-
- /* These are the only relocation types we care about. */
- if ( r_type != R_ARM_PC24
- && r_type != R_ARM_THM_PC22)
- continue;
-
- /* Get the section contents if we haven't done so already. */
- if (contents == NULL)
- {
- /* Get cached copy if it exists. */
- if (elf_section_data (sec)->this_hdr.contents != NULL)
- contents = elf_section_data (sec)->this_hdr.contents;
- else
- {
- /* Go get them off disk. */
- contents = (bfd_byte *) bfd_malloc (sec->_raw_size);
- if (contents == NULL)
- goto error_return;
-
- if (!bfd_get_section_contents (abfd, sec, contents,
- (file_ptr) 0, sec->_raw_size))
- goto error_return;
- }
- }
-
- /* If the relocation is not against a symbol it cannot concern us. */
- h = NULL;
-
- /* We don't care about local symbols. */
- if (r_index < symtab_hdr->sh_info)
- continue;
-
- /* This is an external symbol. */
- r_index -= symtab_hdr->sh_info;
- h = (struct elf_link_hash_entry *)
- elf_sym_hashes (abfd)[r_index];
-
- /* If the relocation is against a static symbol it must be within
- the current section and so cannot be a cross ARM/Thumb relocation. */
- if (h == NULL)
- continue;
-
- switch (r_type)
- {
- case R_ARM_PC24:
- /* This one is a call from arm code. We need to look up
- the target of the call. If it is a thumb target, we
- insert glue. */
- if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC)
- record_arm_to_thumb_glue (link_info, h);
- break;
-
- case R_ARM_THM_PC22:
- /* This one is a call from thumb code. We look
- up the target of the call. If it is not a thumb
- target, we insert glue. */
- if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC)
- record_thumb_to_arm_glue (link_info, h);
- break;
-
- default:
- break;
- }
- }
-
- if (contents != NULL
- && elf_section_data (sec)->this_hdr.contents != contents)
- free (contents);
- contents = NULL;
-
- if (internal_relocs != NULL
- && elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
- internal_relocs = NULL;
- }
-
- return TRUE;
-
-error_return:
- if (contents != NULL
- && elf_section_data (sec)->this_hdr.contents != contents)
- free (contents);
- if (internal_relocs != NULL
- && elf_section_data (sec)->relocs != internal_relocs)
- free (internal_relocs);
-
- return FALSE;
-}
-#endif
-
-/* The thumb form of a long branch is a bit finicky, because the offset
- encoding is split over two fields, each in it's own instruction. They
- can occur in any order. So given a thumb form of long branch, and an
- offset, insert the offset into the thumb branch and return finished
- instruction.
-
- It takes two thumb instructions to encode the target address. Each has
- 11 bits to invest. The upper 11 bits are stored in one (identified by
- H-0.. see below), the lower 11 bits are stored in the other (identified
- by H-1).
-
- Combine together and shifted left by 1 (it's a half word address) and
- there you have it.
-
- Op: 1111 = F,
- H-0, upper address-0 = 000
- Op: 1111 = F,
- H-1, lower address-0 = 800
-
- They can be ordered either way, but the arm tools I've seen always put
- the lower one first. It probably doesn't matter. krk@cygnus.com
-
- XXX: Actually the order does matter. The second instruction (H-1)
- moves the computed address into the PC, so it must be the second one
- in the sequence. The problem, however is that whilst little endian code
- stores the instructions in HI then LOW order, big endian code does the
- reverse. nickc@cygnus.com. */
-
-#define LOW_HI_ORDER 0xF800F000
-#define HI_LOW_ORDER 0xF000F800
-
-static insn32
-insert_thumb_branch (br_insn, rel_off)
- insn32 br_insn;
- int rel_off;
-{
- unsigned int low_bits;
- unsigned int high_bits;
-
- BFD_ASSERT ((rel_off & 1) != 1);
-
- rel_off >>= 1; /* Half word aligned address. */
- low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
- high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
-
- if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
- br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
- else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
- br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
- else
- /* FIXME: abort is probably not the right call. krk@cygnus.com */
- abort (); /* error - not a valid branch instruction form. */
-
- return br_insn;
-}
-
-/* Thumb code calling an ARM function. */
-
-static int
-elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section,
- hit_data, sym_sec, offset, addend, val)
- struct bfd_link_info * info;
- const char * name;
- bfd * input_bfd;
- bfd * output_bfd;
- asection * input_section;
- bfd_byte * hit_data;
- asection * sym_sec;
- bfd_vma offset;
- bfd_signed_vma addend;
- bfd_vma val;
-{
- asection * s = 0;
- bfd_vma my_offset;
- unsigned long int tmp;
- long int ret_offset;
- struct elf_link_hash_entry * myh;
- struct elf32_arm_link_hash_table * globals;
-
- myh = find_thumb_glue (info, name, input_bfd);
- if (myh == NULL)
- return FALSE;
-
- globals = elf32_arm_hash_table (info);
-
- BFD_ASSERT (globals != NULL);
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
-
- my_offset = myh->root.u.def.value;
-
- s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
- THUMB2ARM_GLUE_SECTION_NAME);
-
- BFD_ASSERT (s != NULL);
- BFD_ASSERT (s->contents != NULL);
- BFD_ASSERT (s->output_section != NULL);
-
- if ((my_offset & 0x01) == 0x01)
- {
- if (sym_sec != NULL
- && sym_sec->owner != NULL
- && !INTERWORK_FLAG (sym_sec->owner))
- {
- (*_bfd_error_handler)
- (_("%s(%s): warning: interworking not enabled."),
- bfd_archive_filename (sym_sec->owner), name);
- (*_bfd_error_handler)
- (_(" first occurrence: %s: thumb call to arm"),
- bfd_archive_filename (input_bfd));
-
- return FALSE;
- }
-
- --my_offset;
- myh->root.u.def.value = my_offset;
-
- bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
- s->contents + my_offset);
-
- bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
- s->contents + my_offset + 2);
-
- ret_offset =
- /* Address of destination of the stub. */
- ((bfd_signed_vma) val)
- - ((bfd_signed_vma)
- /* Offset from the start of the current section to the start of the stubs. */
- (s->output_offset
- /* Offset of the start of this stub from the start of the stubs. */
- + my_offset
- /* Address of the start of the current section. */
- + s->output_section->vma)
- /* The branch instruction is 4 bytes into the stub. */
- + 4
- /* ARM branches work from the pc of the instruction + 8. */
- + 8);
-
- bfd_put_32 (output_bfd,
- (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
- s->contents + my_offset + 4);
- }
-
- BFD_ASSERT (my_offset <= globals->thumb_glue_size);
-
- /* Now go back and fix up the original BL insn to point to here. */
- ret_offset =
- /* Address of where the stub is located. */
- (s->output_section->vma + s->output_offset + my_offset)
- /* Address of where the BL is located. */
- - (input_section->output_section->vma + input_section->output_offset + offset)
- /* Addend in the relocation. */
- - addend
- /* Biassing for PC-relative addressing. */
- - 8;
-
- tmp = bfd_get_32 (input_bfd, hit_data
- - input_section->vma);
-
- bfd_put_32 (output_bfd,
- (bfd_vma) insert_thumb_branch (tmp, ret_offset),
- hit_data - input_section->vma);
-
- return TRUE;
-}
-
-/* Arm code calling a Thumb function. */
-
-static int
-elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section,
- hit_data, sym_sec, offset, addend, val)
- struct bfd_link_info * info;
- const char * name;
- bfd * input_bfd;
- bfd * output_bfd;
- asection * input_section;
- bfd_byte * hit_data;
- asection * sym_sec;
- bfd_vma offset;
- bfd_signed_vma addend;
- bfd_vma val;
-{
- unsigned long int tmp;
- bfd_vma my_offset;
- asection * s;
- long int ret_offset;
- struct elf_link_hash_entry * myh;
- struct elf32_arm_link_hash_table * globals;
-
- myh = find_arm_glue (info, name, input_bfd);
- if (myh == NULL)
- return FALSE;
-
- globals = elf32_arm_hash_table (info);
-
- BFD_ASSERT (globals != NULL);
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
-
- my_offset = myh->root.u.def.value;
- s = bfd_get_section_by_name (globals->bfd_of_glue_owner,
- ARM2THUMB_GLUE_SECTION_NAME);
- BFD_ASSERT (s != NULL);
- BFD_ASSERT (s->contents != NULL);
- BFD_ASSERT (s->output_section != NULL);
-
- if ((my_offset & 0x01) == 0x01)
- {
- if (sym_sec != NULL
- && sym_sec->owner != NULL
- && !INTERWORK_FLAG (sym_sec->owner))
- {
- (*_bfd_error_handler)
- (_("%s(%s): warning: interworking not enabled."),
- bfd_archive_filename (sym_sec->owner), name);
- (*_bfd_error_handler)
- (_(" first occurrence: %s: arm call to thumb"),
- bfd_archive_filename (input_bfd));
- }
-
- --my_offset;
- myh->root.u.def.value = my_offset;
-
- bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
- s->contents + my_offset);
-
- bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
- s->contents + my_offset + 4);
-
- /* It's a thumb address. Add the low order bit. */
- bfd_put_32 (output_bfd, val | a2t3_func_addr_insn,
- s->contents + my_offset + 8);
- }
-
- BFD_ASSERT (my_offset <= globals->arm_glue_size);
-
- tmp = bfd_get_32 (input_bfd, hit_data);
- tmp = tmp & 0xFF000000;
-
- /* Somehow these are both 4 too far, so subtract 8. */
- ret_offset = (s->output_offset
- + my_offset
- + s->output_section->vma
- - (input_section->output_offset
- + input_section->output_section->vma
- + offset + addend)
- - 8);
-
- tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
-
- bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma);
-
- return TRUE;
-}
-
-/* This is the condition under which elf32_arm_finish_dynamic_symbol
- will be called from elflink.h. If elflink.h doesn't call our
- finish_dynamic_symbol routine, we'll need to do something about
- initializing any .plt and .got entries in elf32_arm_relocate_section
- and elf32_arm_final_link_relocate. */
-#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
- ((DYN) \
- && ((SHARED) \
- || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
- && ((H)->dynindx != -1 \
- || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
-
-/* Perform a relocation as part of a final link. */
-
-static bfd_reloc_status_type
-elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
- input_section, contents, rel, value,
- info, sym_sec, sym_name, sym_flags, h)
- reloc_howto_type * howto;
- bfd * input_bfd;
- bfd * output_bfd;
- asection * input_section;
- bfd_byte * contents;
- Elf_Internal_Rela * rel;
- bfd_vma value;
- struct bfd_link_info * info;
- asection * sym_sec;
- const char * sym_name;
- int sym_flags;
- struct elf_link_hash_entry * h;
-{
- unsigned long r_type = howto->type;
- unsigned long r_symndx;
- bfd_byte * hit_data = contents + rel->r_offset;
- bfd * dynobj = NULL;
- Elf_Internal_Shdr * symtab_hdr;
- struct elf_link_hash_entry ** sym_hashes;
- bfd_vma * local_got_offsets;
- asection * sgot = NULL;
- asection * splt = NULL;
- asection * sreloc = NULL;
- bfd_vma addend;
- bfd_signed_vma signed_addend;
- struct elf32_arm_link_hash_table * globals;
-
- /* If the start address has been set, then set the EF_ARM_HASENTRY
- flag. Setting this more than once is redundant, but the cost is
- not too high, and it keeps the code simple.
-
- The test is done here, rather than somewhere else, because the
- start address is only set just before the final link commences.
-
- Note - if the user deliberately sets a start address of 0, the
- flag will not be set. */
- if (bfd_get_start_address (output_bfd) != 0)
- elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
-
- globals = elf32_arm_hash_table (info);
-
- dynobj = elf_hash_table (info)->dynobj;
- if (dynobj)
- {
- sgot = bfd_get_section_by_name (dynobj, ".got");
- splt = bfd_get_section_by_name (dynobj, ".plt");
- }
- symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (input_bfd);
- local_got_offsets = elf_local_got_offsets (input_bfd);
- r_symndx = ELF32_R_SYM (rel->r_info);
-
-#if USE_REL
- addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
-
- if (addend & ((howto->src_mask + 1) >> 1))
- {
- signed_addend = -1;
- signed_addend &= ~ howto->src_mask;
- signed_addend |= addend;
- }
- else
- signed_addend = addend;
-#else
- addend = signed_addend = rel->r_addend;
-#endif
-
- switch (r_type)
- {
- case R_ARM_NONE:
- return bfd_reloc_ok;
-
- case R_ARM_PC24:
- case R_ARM_ABS32:
- case R_ARM_REL32:
-#ifndef OLD_ARM_ABI
- case R_ARM_XPC25:
-#endif
- case R_ARM_PLT32:
- /* r_symndx will be zero only for relocs against symbols
- from removed linkonce sections, or sections discarded by
- a linker script. */
- if (r_symndx == 0)
- return bfd_reloc_ok;
-
- /* Handle relocations which should use the PLT entry. ABS32/REL32
- will use the symbol's value, which may point to a PLT entry, but we
- don't need to handle that here. If we created a PLT entry, all
- branches in this object should go to it. */
- if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32)
- && h != NULL
- && h->plt.offset != (bfd_vma) -1)
- {
- BFD_ASSERT (splt != NULL);
- BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h));
-
- value = (splt->output_section->vma
- + splt->output_offset
- + h->plt.offset);
- return _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, value,
- (bfd_vma) 0);
- }
-
- /* When generating a shared object, these relocations are copied
- into the output file to be resolved at run time. */
- if (info->shared
- && (input_section->flags & SEC_ALLOC)
- && (h == NULL
- || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- || h->root.type != bfd_link_hash_undefweak)
- && r_type != R_ARM_PC24
- && r_type != R_ARM_PLT32)
- {
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
- bfd_boolean skip, relocate;
-
- if (sreloc == NULL)
- {
- const char * name;
-
- name = (bfd_elf_string_from_elf_section
- (input_bfd,
- elf_elfheader (input_bfd)->e_shstrndx,
- elf_section_data (input_section)->rel_hdr.sh_name));
- if (name == NULL)
- return bfd_reloc_notsupported;
-
- BFD_ASSERT (strncmp (name, ".rel", 4) == 0
- && strcmp (bfd_get_section_name (input_bfd,
- input_section),
- name + 4) == 0);
-
- sreloc = bfd_get_section_by_name (dynobj, name);
- BFD_ASSERT (sreloc != NULL);
- }
-
- skip = FALSE;
- relocate = FALSE;
-
- outrel.r_offset =
- _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset);
- if (outrel.r_offset == (bfd_vma) -1)
- skip = TRUE;
- else if (outrel.r_offset == (bfd_vma) -2)
- skip = TRUE, relocate = TRUE;
- outrel.r_offset += (input_section->output_section->vma
- + input_section->output_offset);
-
- if (skip)
- memset (&outrel, 0, sizeof outrel);
- else if (h != NULL
- && h->dynindx != -1
- && (!info->shared
- || !info->symbolic
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))
- outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
- else
- {
- /* This symbol is local, or marked to become local. */
- relocate = TRUE;
- outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
- }
-
- loc = sreloc->contents;
- loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
- bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
-
- /* If this reloc is against an external symbol, we do not want to
- fiddle with the addend. Otherwise, we need to include the symbol
- value so that it becomes an addend for the dynamic reloc. */
- if (! relocate)
- return bfd_reloc_ok;
-
- return _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, value,
- (bfd_vma) 0);
- }
- else switch (r_type)
- {
-#ifndef OLD_ARM_ABI
- case R_ARM_XPC25: /* Arm BLX instruction. */
-#endif
- case R_ARM_PC24: /* Arm B/BL instruction */
- case R_ARM_PLT32:
-#ifndef OLD_ARM_ABI
- if (r_type == R_ARM_XPC25)
- {
- /* Check for Arm calling Arm function. */
- /* FIXME: Should we translate the instruction into a BL
- instruction instead ? */
- if (sym_flags != STT_ARM_TFUNC)
- (*_bfd_error_handler) (_("\
-%s: Warning: Arm BLX instruction targets Arm function '%s'."),
- bfd_archive_filename (input_bfd),
- h ? h->root.root.string : "(local)");
- }
- else
-#endif
- {
- /* Check for Arm calling Thumb function. */
- if (sym_flags == STT_ARM_TFUNC)
- {
- elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd,
- input_section, hit_data, sym_sec, rel->r_offset,
- signed_addend, value);
- return bfd_reloc_ok;
- }
- }
-
- if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
- || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0)
- {
- /* The old way of doing things. Trearing the addend as a
- byte sized field and adding in the pipeline offset. */
- value -= (input_section->output_section->vma
- + input_section->output_offset);
- value -= rel->r_offset;
- value += addend;
-
- if (! globals->no_pipeline_knowledge)
- value -= 8;
- }
- else
- {
- /* The ARM ELF ABI says that this reloc is computed as: S - P + A
- where:
- S is the address of the symbol in the relocation.
- P is address of the instruction being relocated.
- A is the addend (extracted from the instruction) in bytes.
-
- S is held in 'value'.
- P is the base address of the section containing the instruction
- plus the offset of the reloc into that section, ie:
- (input_section->output_section->vma +
- input_section->output_offset +
- rel->r_offset).
- A is the addend, converted into bytes, ie:
- (signed_addend * 4)
-
- Note: None of these operations have knowledge of the pipeline
- size of the processor, thus it is up to the assembler to encode
- this information into the addend. */
- value -= (input_section->output_section->vma
- + input_section->output_offset);
- value -= rel->r_offset;
- value += (signed_addend << howto->size);
-
- /* Previous versions of this code also used to add in the pipeline
- offset here. This is wrong because the linker is not supposed
- to know about such things, and one day it might change. In order
- to support old binaries that need the old behaviour however, so
- we attempt to detect which ABI was used to create the reloc. */
- if (! globals->no_pipeline_knowledge)
- {
- Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */
-
- i_ehdrp = elf_elfheader (input_bfd);
-
- if (i_ehdrp->e_ident[EI_OSABI] == 0)
- value -= 8;
- }
- }
-
- signed_addend = value;
- signed_addend >>= howto->rightshift;
-
- /* It is not an error for an undefined weak reference to be
- out of range. Any program that branches to such a symbol
- is going to crash anyway, so there is no point worrying
- about getting the destination exactly right. */
- if (! h || h->root.type != bfd_link_hash_undefweak)
- {
- /* Perform a signed range check. */
- if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1))
- || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
- return bfd_reloc_overflow;
- }
-
-#ifndef OLD_ARM_ABI
- /* If necessary set the H bit in the BLX instruction. */
- if (r_type == R_ARM_XPC25 && ((value & 2) == 2))
- value = (signed_addend & howto->dst_mask)
- | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask))
- | (1 << 24);
- else
-#endif
- value = (signed_addend & howto->dst_mask)
- | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
- break;
-
- case R_ARM_ABS32:
- value += addend;
- if (sym_flags == STT_ARM_TFUNC)
- value |= 1;
- break;
-
- case R_ARM_REL32:
- value -= (input_section->output_section->vma
- + input_section->output_offset + rel->r_offset);
- value += addend;
- break;
- }
-
- bfd_put_32 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_ARM_ABS8:
- value += addend;
- if ((long) value > 0x7f || (long) value < -0x80)
- return bfd_reloc_overflow;
-
- bfd_put_8 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_ARM_ABS16:
- value += addend;
-
- if ((long) value > 0x7fff || (long) value < -0x8000)
- return bfd_reloc_overflow;
-
- bfd_put_16 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_ARM_ABS12:
- /* Support ldr and str instruction for the arm */
- /* Also thumb b (unconditional branch). ??? Really? */
- value += addend;
-
- if ((long) value > 0x7ff || (long) value < -0x800)
- return bfd_reloc_overflow;
-
- value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000);
- bfd_put_32 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
- case R_ARM_THM_ABS5:
- /* Support ldr and str instructions for the thumb. */
-#if USE_REL
- /* Need to refetch addend. */
- addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
- /* ??? Need to determine shift amount from operand size. */
- addend >>= howto->rightshift;
-#endif
- value += addend;
-
- /* ??? Isn't value unsigned? */
- if ((long) value > 0x1f || (long) value < -0x10)
- return bfd_reloc_overflow;
-
- /* ??? Value needs to be properly shifted into place first. */
- value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f;
- bfd_put_16 (input_bfd, value, hit_data);
- return bfd_reloc_ok;
-
-#ifndef OLD_ARM_ABI
- case R_ARM_THM_XPC22:
-#endif
- case R_ARM_THM_PC22:
- /* Thumb BL (branch long instruction). */
- {
- bfd_vma relocation;
- bfd_boolean overflow = FALSE;
- bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data);
- bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2);
- bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift;
- bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
- bfd_vma check;
- bfd_signed_vma signed_check;
-
-#if USE_REL
- /* Need to refetch the addend and squish the two 11 bit pieces
- together. */
- {
- bfd_vma upper = upper_insn & 0x7ff;
- bfd_vma lower = lower_insn & 0x7ff;
- upper = (upper ^ 0x400) - 0x400; /* Sign extend. */
- addend = (upper << 12) | (lower << 1);
- signed_addend = addend;
- }
-#endif
-#ifndef OLD_ARM_ABI
- if (r_type == R_ARM_THM_XPC22)
- {
- /* Check for Thumb to Thumb call. */
- /* FIXME: Should we translate the instruction into a BL
- instruction instead ? */
- if (sym_flags == STT_ARM_TFUNC)
- (*_bfd_error_handler) (_("\
-%s: Warning: Thumb BLX instruction targets thumb function '%s'."),
- bfd_archive_filename (input_bfd),
- h ? h->root.root.string : "(local)");
- }
- else
-#endif
- {
- /* If it is not a call to Thumb, assume call to Arm.
- If it is a call relative to a section name, then it is not a
- function call at all, but rather a long jump. */
- if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION)
- {
- if (elf32_thumb_to_arm_stub
- (info, sym_name, input_bfd, output_bfd, input_section,
- hit_data, sym_sec, rel->r_offset, signed_addend, value))
- return bfd_reloc_ok;
- else
- return bfd_reloc_dangerous;
- }
- }
-
- relocation = value + signed_addend;
-
- relocation -= (input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset);
-
- if (! globals->no_pipeline_knowledge)
- {
- Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */
-
- i_ehdrp = elf_elfheader (input_bfd);
-
- /* Previous versions of this code also used to add in the pipline
- offset here. This is wrong because the linker is not supposed
- to know about such things, and one day it might change. In order
- to support old binaries that need the old behaviour however, so
- we attempt to detect which ABI was used to create the reloc. */
- if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0
- || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0
- || i_ehdrp->e_ident[EI_OSABI] == 0)
- relocation += 4;
- }
-
- check = relocation >> howto->rightshift;
-
- /* If this is a signed value, the rightshift just dropped
- leading 1 bits (assuming twos complement). */
- if ((bfd_signed_vma) relocation >= 0)
- signed_check = check;
- else
- signed_check = check | ~((bfd_vma) -1 >> howto->rightshift);
-
- /* Assumes two's complement. */
- if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
- overflow = TRUE;
-
-#ifndef OLD_ARM_ABI
- if (r_type == R_ARM_THM_XPC22
- && ((lower_insn & 0x1800) == 0x0800))
- /* For a BLX instruction, make sure that the relocation is rounded up
- to a word boundary. This follows the semantics of the instruction
- which specifies that bit 1 of the target address will come from bit
- 1 of the base address. */
- relocation = (relocation + 2) & ~ 3;
-#endif
- /* Put RELOCATION back into the insn. */
- upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
- lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
-
- /* Put the relocated value back in the object file: */
- bfd_put_16 (input_bfd, upper_insn, hit_data);
- bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
-
- return (overflow ? bfd_reloc_overflow : bfd_reloc_ok);
- }
- break;
-
- case R_ARM_THM_PC11:
- /* Thumb B (branch) instruction). */
- {
- bfd_signed_vma relocation;
- bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
- bfd_signed_vma reloc_signed_min = ~ reloc_signed_max;
- bfd_signed_vma signed_check;
-
-#if USE_REL
- /* Need to refetch addend. */
- addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask;
- if (addend & ((howto->src_mask + 1) >> 1))
- {
- signed_addend = -1;
- signed_addend &= ~ howto->src_mask;
- signed_addend |= addend;
- }
- else
- signed_addend = addend;
- /* The value in the insn has been right shifted. We need to
- undo this, so that we can perform the address calculation
- in terms of bytes. */
- signed_addend <<= howto->rightshift;
-#endif
- relocation = value + signed_addend;
-
- relocation -= (input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset);
-
- relocation >>= howto->rightshift;
- signed_check = relocation;
- relocation &= howto->dst_mask;
- relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask));
-
- bfd_put_16 (input_bfd, relocation, hit_data);
-
- /* Assumes two's complement. */
- if (signed_check > reloc_signed_max || signed_check < reloc_signed_min)
- return bfd_reloc_overflow;
-
- return bfd_reloc_ok;
- }
-
- case R_ARM_GNU_VTINHERIT:
- case R_ARM_GNU_VTENTRY:
- return bfd_reloc_ok;
-
- case R_ARM_COPY:
- return bfd_reloc_notsupported;
-
- case R_ARM_GLOB_DAT:
- return bfd_reloc_notsupported;
-
- case R_ARM_JUMP_SLOT:
- return bfd_reloc_notsupported;
-
- case R_ARM_RELATIVE:
- return bfd_reloc_notsupported;
-
- case R_ARM_GOTOFF:
- /* Relocation is relative to the start of the
- global offset table. */
-
- BFD_ASSERT (sgot != NULL);
- if (sgot == NULL)
- return bfd_reloc_notsupported;
-
- /* If we are addressing a Thumb function, we need to adjust the
- address by one, so that attempts to call the function pointer will
- correctly interpret it as Thumb code. */
- if (sym_flags == STT_ARM_TFUNC)
- value += 1;
-
- /* Note that sgot->output_offset is not involved in this
- calculation. We always want the start of .got. If we
- define _GLOBAL_OFFSET_TABLE in a different way, as is
- permitted by the ABI, we might have to change this
- calculation. */
- value -= sgot->output_section->vma;
- return _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, value,
- (bfd_vma) 0);
-
- case R_ARM_GOTPC:
- /* Use global offset table as symbol value. */
- BFD_ASSERT (sgot != NULL);
-
- if (sgot == NULL)
- return bfd_reloc_notsupported;
-
- value = sgot->output_section->vma;
- return _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, value,
- (bfd_vma) 0);
-
- case R_ARM_GOT32:
- /* Relocation is to the entry for this symbol in the
- global offset table. */
- if (sgot == NULL)
- return bfd_reloc_notsupported;
-
- if (h != NULL)
- {
- bfd_vma off;
- bfd_boolean dyn;
-
- off = h->got.offset;
- BFD_ASSERT (off != (bfd_vma) -1);
- dyn = globals->root.dynamic_sections_created;
-
- if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
- || (info->shared
- && SYMBOL_REFERENCES_LOCAL (info, h))
- || (ELF_ST_VISIBILITY (h->other)
- && h->root.type == bfd_link_hash_undefweak))
- {
- /* This is actually a static link, or it is a -Bsymbolic link
- and the symbol is defined locally. 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 .rel.got relocation
- entry to initialize the value. This is done in the
- finish_dynamic_symbol routine. */
- if ((off & 1) != 0)
- off &= ~1;
- else
- {
- /* If we are addressing a Thumb function, we need to
- adjust the address by one, so that attempts to
- call the function pointer will correctly
- interpret it as Thumb code. */
- if (sym_flags == STT_ARM_TFUNC)
- value |= 1;
-
- bfd_put_32 (output_bfd, value, sgot->contents + off);
- h->got.offset |= 1;
- }
- }
-
- value = sgot->output_offset + off;
- }
- else
- {
- bfd_vma off;
-
- BFD_ASSERT (local_got_offsets != NULL &&
- local_got_offsets[r_symndx] != (bfd_vma) -1);
-
- 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
- generated the necessary reloc. */
- if ((off & 1) != 0)
- off &= ~1;
- else
- {
- bfd_put_32 (output_bfd, value, sgot->contents + off);
-
- if (info->shared)
- {
- asection * srelgot;
- Elf_Internal_Rela outrel;
- bfd_byte *loc;
-
- srelgot = bfd_get_section_by_name (dynobj, ".rel.got");
- BFD_ASSERT (srelgot != NULL);
-
- outrel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + off);
- outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
- loc = srelgot->contents;
- loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
- bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
- }
-
- local_got_offsets[r_symndx] |= 1;
- }
-
- value = sgot->output_offset + off;
- }
-
- return _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents, rel->r_offset, value,
- (bfd_vma) 0);
-
- case R_ARM_SBREL32:
- return bfd_reloc_notsupported;
-
- case R_ARM_AMP_VCALL9:
- return bfd_reloc_notsupported;
-
- case R_ARM_RSBREL32:
- return bfd_reloc_notsupported;
-
- case R_ARM_THM_RPC22:
- return bfd_reloc_notsupported;
-
- case R_ARM_RREL32:
- return bfd_reloc_notsupported;
-
- case R_ARM_RABS32:
- return bfd_reloc_notsupported;
-
- case R_ARM_RPC24:
- return bfd_reloc_notsupported;
-
- case R_ARM_RBASE:
- return bfd_reloc_notsupported;
-
- default:
- return bfd_reloc_notsupported;
- }
-}
-
-#if USE_REL
-/* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */
-static void
-arm_add_to_rel (abfd, address, howto, increment)
- bfd * abfd;
- bfd_byte * address;
- reloc_howto_type * howto;
- bfd_signed_vma increment;
-{
- bfd_signed_vma addend;
-
- if (howto->type == R_ARM_THM_PC22)
- {
- int upper_insn, lower_insn;
- int upper, lower;
-
- upper_insn = bfd_get_16 (abfd, address);
- lower_insn = bfd_get_16 (abfd, address + 2);
- upper = upper_insn & 0x7ff;
- lower = lower_insn & 0x7ff;
-
- addend = (upper << 12) | (lower << 1);
- addend += increment;
- addend >>= 1;
-
- upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff);
- lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff);
-
- bfd_put_16 (abfd, (bfd_vma) upper_insn, address);
- bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2);
- }
- else
- {
- bfd_vma contents;
-
- contents = bfd_get_32 (abfd, address);
-
- /* Get the (signed) value from the instruction. */
- addend = contents & howto->src_mask;
- if (addend & ((howto->src_mask + 1) >> 1))
- {
- bfd_signed_vma mask;
-
- mask = -1;
- mask &= ~ howto->src_mask;
- addend |= mask;
- }
-
- /* Add in the increment, (which is a byte value). */
- switch (howto->type)
- {
- default:
- addend += increment;
- break;
-
- case R_ARM_PC24:
- addend <<= howto->size;
- addend += increment;
-
- /* Should we check for overflow here ? */
-
- /* Drop any undesired bits. */
- addend >>= howto->rightshift;
- break;
- }
-
- contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask);
-
- bfd_put_32 (abfd, contents, address);
- }
-}
-#endif /* USE_REL */
-
-/* Relocate an ARM ELF section. */
-static bfd_boolean
-elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- 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;
- struct elf_link_hash_entry **sym_hashes;
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend;
- const char *name;
-
-#if !USE_REL
- if (info->relocatable)
- return TRUE;
-#endif
-
- 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++)
- {
- int r_type;
- reloc_howto_type * howto;
- unsigned long r_symndx;
- Elf_Internal_Sym * sym;
- asection * sec;
- struct elf_link_hash_entry * h;
- bfd_vma relocation;
- bfd_reloc_status_type r;
- arelent bfd_reloc;
-
- r_symndx = ELF32_R_SYM (rel->r_info);
- r_type = ELF32_R_TYPE (rel->r_info);
-
- if ( r_type == R_ARM_GNU_VTENTRY
- || r_type == R_ARM_GNU_VTINHERIT)
- continue;
-
- elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel);
- howto = bfd_reloc.howto;
-
-#if USE_REL
- 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 (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
- {
- sec = local_sections[r_symndx];
- arm_add_to_rel (input_bfd, contents + rel->r_offset,
- howto,
- (bfd_signed_vma) (sec->output_offset
- + sym->st_value));
- }
- }
-
- continue;
- }
-#endif
-
- /* This is a final link. */
- h = NULL;
- sym = NULL;
- sec = NULL;
-
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
-#if USE_REL
- relocation = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
- if ((sec->flags & SEC_MERGE)
- && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
- {
- asection *msec;
- bfd_vma addend, value;
-
- if (howto->rightshift)
- {
- (*_bfd_error_handler)
- (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
- (long) rel->r_offset, howto->name);
- return FALSE;
- }
-
- value = bfd_get_32 (input_bfd, contents + rel->r_offset);
-
- /* Get the (signed) value from the instruction. */
- addend = value & howto->src_mask;
- if (addend & ((howto->src_mask + 1) >> 1))
- {
- bfd_signed_vma mask;
-
- mask = -1;
- mask &= ~ howto->src_mask;
- addend |= mask;
- }
- msec = sec;
- addend =
- _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend)
- - relocation;
- addend += msec->output_section->vma + msec->output_offset;
- value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask);
- bfd_put_32 (input_bfd, value, contents + rel->r_offset);
- }
-#else
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
-#endif
- }
- else
- {
- bfd_boolean warned;
- bfd_boolean unresolved_reloc;
-
- RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
- symtab_hdr, relocation,
- sec, unresolved_reloc, info,
- warned);
-
- if (unresolved_reloc || relocation != 0)
- {
- /* In these cases, we don't need the relocation value.
- We check specially because in some obscure cases
- sec->output_section will be NULL. */
- switch (r_type)
- {
- case R_ARM_PC24:
- case R_ARM_ABS32:
- case R_ARM_THM_PC22:
- if (info->shared
- && (
- (!info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0
- )
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- && ((input_section->flags & SEC_ALLOC) != 0
- /* DWARF will emit R_ARM_ABS32 relocations in its
- sections against symbols defined externally
- in shared libraries. We can't do anything
- with them here. */
- || ((input_section->flags & SEC_DEBUGGING) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
- )
- relocation = 0;
- break;
-
- case R_ARM_GOTPC:
- relocation = 0;
- break;
-
- case R_ARM_GOT32:
- if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL
- (elf_hash_table (info)->dynamic_sections_created,
- info->shared, h))
- && (!info->shared
- || (!info->symbolic && h->dynindx != -1)
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))
- relocation = 0;
- break;
-
- case R_ARM_PLT32:
- if (h->plt.offset != (bfd_vma)-1)
- relocation = 0;
- break;
-
- default:
- if (unresolved_reloc)
- _bfd_error_handler
- (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"),
- bfd_archive_filename (input_bfd),
- r_type,
- h->root.root.string,
- bfd_get_section_name (input_bfd, input_section));
- break;
- }
- }
- }
-
- 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);
- }
-
- r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
- input_section, contents, rel,
- relocation, info, sec, name,
- (h ? ELF_ST_TYPE (h->type) :
- ELF_ST_TYPE (sym->st_info)), h);
-
- if (r != bfd_reloc_ok)
- {
- const char * msg = (const char *) 0;
-
- switch (r)
- {
- case bfd_reloc_overflow:
- /* If the overflowing reloc was to an undefined symbol,
- we have already printed one error message and there
- is no point complaining again. */
- if ((! h ||
- h->root.type != bfd_link_hash_undefined)
- && (!((*info->callbacks->reloc_overflow)
- (info, 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;
-}
-
-/* Set the right machine number. */
-
-static bfd_boolean
-elf32_arm_object_p (abfd)
- bfd *abfd;
-{
- unsigned int mach;
-
- mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION);
-
- if (mach != bfd_mach_arm_unknown)
- bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
-
- else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT)
- bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312);
-
- else
- bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach);
-
- return TRUE;
-}
-
-/* Function to keep ARM specific flags in the ELF header. */
-static bfd_boolean
-elf32_arm_set_private_flags (abfd, flags)
- bfd *abfd;
- flagword flags;
-{
- if (elf_flags_init (abfd)
- && elf_elfheader (abfd)->e_flags != flags)
- {
- if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
- {
- if (flags & EF_ARM_INTERWORK)
- (*_bfd_error_handler) (_("\
-Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"),
- bfd_archive_filename (abfd));
- else
- _bfd_error_handler (_("\
-Warning: Clearing the interworking flag of %s due to outside request"),
- bfd_archive_filename (abfd));
- }
- }
- else
- {
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = TRUE;
- }
-
- return TRUE;
-}
-
-/* Copy backend specific data from one object module to another. */
-
-static bfd_boolean
-elf32_arm_copy_private_bfd_data (ibfd, obfd)
- bfd *ibfd;
- bfd *obfd;
-{
- flagword in_flags;
- flagword out_flags;
-
- if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return TRUE;
-
- in_flags = elf_elfheader (ibfd)->e_flags;
- out_flags = elf_elfheader (obfd)->e_flags;
-
- if (elf_flags_init (obfd)
- && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN
- && in_flags != out_flags)
- {
- /* Cannot mix APCS26 and APCS32 code. */
- if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
- return FALSE;
-
- /* Cannot mix float APCS and non-float APCS code. */
- if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
- return FALSE;
-
- /* If the src and dest have different interworking flags
- then turn off the interworking bit. */
- if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
- {
- if (out_flags & EF_ARM_INTERWORK)
- _bfd_error_handler (_("\
-Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"),
- bfd_get_filename (obfd),
- bfd_archive_filename (ibfd));
-
- in_flags &= ~EF_ARM_INTERWORK;
- }
-
- /* Likewise for PIC, though don't warn for this case. */
- if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
- in_flags &= ~EF_ARM_PIC;
- }
-
- elf_elfheader (obfd)->e_flags = in_flags;
- elf_flags_init (obfd) = TRUE;
-
- return TRUE;
-}
-
-/* Merge backend specific data from an object file to the output
- object file when linking. */
-
-static bfd_boolean
-elf32_arm_merge_private_bfd_data (ibfd, obfd)
- bfd * ibfd;
- bfd * obfd;
-{
- flagword out_flags;
- flagword in_flags;
- bfd_boolean flags_compatible = TRUE;
- asection *sec;
-
- /* Check if we have the same endianess. */
- if (! _bfd_generic_verify_endian_match (ibfd, obfd))
- return FALSE;
-
- if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return TRUE;
-
- /* The input BFD must have had its flags initialised. */
- /* The following seems bogus to me -- The flags are initialized in
- the assembler but I don't think an elf_flags_init field is
- written into the object. */
- /* BFD_ASSERT (elf_flags_init (ibfd)); */
-
- in_flags = elf_elfheader (ibfd)->e_flags;
- out_flags = elf_elfheader (obfd)->e_flags;
-
- if (!elf_flags_init (obfd))
- {
- /* If the input is the default architecture and had the default
- flags then do not bother setting the flags for the output
- architecture, instead allow future merges to do this. If no
- future merges ever set these flags then they will retain their
- uninitialised values, which surprise surprise, correspond
- to the default values. */
- if (bfd_get_arch_info (ibfd)->the_default
- && elf_elfheader (ibfd)->e_flags == 0)
- return TRUE;
-
- elf_flags_init (obfd) = TRUE;
- elf_elfheader (obfd)->e_flags = in_flags;
-
- if (bfd_get_arch (obfd) == bfd_get_arch (ibfd)
- && bfd_get_arch_info (obfd)->the_default)
- return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
-
- return TRUE;
- }
-
- /* Determine what should happen if the input ARM architecture
- does not match the output ARM architecture. */
- if (! bfd_arm_merge_machines (ibfd, obfd))
- return FALSE;
-
- /* Identical flags must be compatible. */
- if (in_flags == out_flags)
- return TRUE;
-
- /* Check to see if the input BFD actually contains any sections. If
- not, its flags may not have been initialised either, but it
- cannot actually cause any incompatibility. Do not short-circuit
- dynamic objects; their section list may be emptied by
- elf_link_add_object_symbols. */
-
- if (!(ibfd->flags & DYNAMIC))
- {
- bfd_boolean null_input_bfd = TRUE;
-
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- {
- /* Ignore synthetic glue sections. */
- if (strcmp (sec->name, ".glue_7")
- && strcmp (sec->name, ".glue_7t"))
- {
- null_input_bfd = FALSE;
- break;
- }
- }
- if (null_input_bfd)
- return TRUE;
- }
-
- /* Complain about various flag mismatches. */
- if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags))
- {
- _bfd_error_handler (_("\
-ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"),
- bfd_archive_filename (ibfd),
- (in_flags & EF_ARM_EABIMASK) >> 24,
- bfd_get_filename (obfd),
- (out_flags & EF_ARM_EABIMASK) >> 24);
- return FALSE;
- }
-
- /* Not sure what needs to be checked for EABI versions >= 1. */
- if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
- {
- if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
- {
- _bfd_error_handler (_("\
-ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"),
- bfd_archive_filename (ibfd),
- in_flags & EF_ARM_APCS_26 ? 26 : 32,
- bfd_get_filename (obfd),
- out_flags & EF_ARM_APCS_26 ? 26 : 32);
- flags_compatible = FALSE;
- }
-
- if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
- {
- if (in_flags & EF_ARM_APCS_FLOAT)
- _bfd_error_handler (_("\
-ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
- else
- _bfd_error_handler (_("\
-ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
-
- flags_compatible = FALSE;
- }
-
- if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT))
- {
- if (in_flags & EF_ARM_VFP_FLOAT)
- _bfd_error_handler (_("\
-ERROR: %s uses VFP instructions, whereas %s does not"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
- else
- _bfd_error_handler (_("\
-ERROR: %s uses FPA instructions, whereas %s does not"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
-
- flags_compatible = FALSE;
- }
-
- if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT))
- {
- if (in_flags & EF_ARM_MAVERICK_FLOAT)
- _bfd_error_handler (_("\
-ERROR: %s uses Maverick instructions, whereas %s does not"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
- else
- _bfd_error_handler (_("\
-ERROR: %s does not use Maverick instructions, whereas %s does"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
-
- flags_compatible = FALSE;
- }
-
-#ifdef EF_ARM_SOFT_FLOAT
- if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
- {
- /* We can allow interworking between code that is VFP format
- layout, and uses either soft float or integer regs for
- passing floating point arguments and results. We already
- know that the APCS_FLOAT flags match; similarly for VFP
- flags. */
- if ((in_flags & EF_ARM_APCS_FLOAT) != 0
- || (in_flags & EF_ARM_VFP_FLOAT) == 0)
- {
- if (in_flags & EF_ARM_SOFT_FLOAT)
- _bfd_error_handler (_("\
-ERROR: %s uses software FP, whereas %s uses hardware FP"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
- else
- _bfd_error_handler (_("\
-ERROR: %s uses hardware FP, whereas %s uses software FP"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
-
- flags_compatible = FALSE;
- }
- }
-#endif
-
- /* Interworking mismatch is only a warning. */
- if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
- {
- if (in_flags & EF_ARM_INTERWORK)
- {
- _bfd_error_handler (_("\
-Warning: %s supports interworking, whereas %s does not"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
- }
- else
- {
- _bfd_error_handler (_("\
-Warning: %s does not support interworking, whereas %s does"),
- bfd_archive_filename (ibfd),
- bfd_get_filename (obfd));
- }
- }
- }
-
- return flags_compatible;
-}
-
-/* Display the flags field. */
-
-static bfd_boolean
-elf32_arm_print_private_bfd_data (abfd, ptr)
- bfd *abfd;
- PTR ptr;
-{
- FILE * file = (FILE *) ptr;
- unsigned long flags;
-
- BFD_ASSERT (abfd != NULL && ptr != NULL);
-
- /* Print normal ELF private data. */
- _bfd_elf_print_private_bfd_data (abfd, ptr);
-
- flags = elf_elfheader (abfd)->e_flags;
- /* Ignore init flag - it may not be set, despite the flags field
- containing valid data. */
-
- /* xgettext:c-format */
- fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
-
- switch (EF_ARM_EABI_VERSION (flags))
- {
- case EF_ARM_EABI_UNKNOWN:
- /* The following flag bits are GNU extensions and not part of the
- official ARM ELF extended ABI. Hence they are only decoded if
- the EABI version is not set. */
- if (flags & EF_ARM_INTERWORK)
- fprintf (file, _(" [interworking enabled]"));
-
- if (flags & EF_ARM_APCS_26)
- fprintf (file, " [APCS-26]");
- else
- fprintf (file, " [APCS-32]");
-
- if (flags & EF_ARM_VFP_FLOAT)
- fprintf (file, _(" [VFP float format]"));
- else if (flags & EF_ARM_MAVERICK_FLOAT)
- fprintf (file, _(" [Maverick float format]"));
- else
- fprintf (file, _(" [FPA float format]"));
-
- if (flags & EF_ARM_APCS_FLOAT)
- fprintf (file, _(" [floats passed in float registers]"));
-
- if (flags & EF_ARM_PIC)
- fprintf (file, _(" [position independent]"));
-
- if (flags & EF_ARM_NEW_ABI)
- fprintf (file, _(" [new ABI]"));
-
- if (flags & EF_ARM_OLD_ABI)
- fprintf (file, _(" [old ABI]"));
-
- if (flags & EF_ARM_SOFT_FLOAT)
- fprintf (file, _(" [software FP]"));
-
- flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT
- | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI
- | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT
- | EF_ARM_MAVERICK_FLOAT);
- break;
-
- case EF_ARM_EABI_VER1:
- fprintf (file, _(" [Version1 EABI]"));
-
- if (flags & EF_ARM_SYMSARESORTED)
- fprintf (file, _(" [sorted symbol table]"));
- else
- fprintf (file, _(" [unsorted symbol table]"));
-
- flags &= ~ EF_ARM_SYMSARESORTED;
- break;
-
- case EF_ARM_EABI_VER2:
- fprintf (file, _(" [Version2 EABI]"));
-
- if (flags & EF_ARM_SYMSARESORTED)
- fprintf (file, _(" [sorted symbol table]"));
- else
- fprintf (file, _(" [unsorted symbol table]"));
-
- if (flags & EF_ARM_DYNSYMSUSESEGIDX)
- fprintf (file, _(" [dynamic symbols use segment index]"));
-
- if (flags & EF_ARM_MAPSYMSFIRST)
- fprintf (file, _(" [mapping symbols precede others]"));
-
- flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
- | EF_ARM_MAPSYMSFIRST);
- break;
-
- default:
- fprintf (file, _(" <EABI version unrecognised>"));
- break;
- }
-
- flags &= ~ EF_ARM_EABIMASK;
-
- if (flags & EF_ARM_RELEXEC)
- fprintf (file, _(" [relocatable executable]"));
-
- if (flags & EF_ARM_HASENTRY)
- fprintf (file, _(" [has entry point]"));
-
- flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY);
-
- if (flags)
- fprintf (file, _("<Unrecognised flag bits set>"));
-
- fputc ('\n', file);
-
- return TRUE;
-}
-
-static int
-elf32_arm_get_symbol_type (elf_sym, type)
- Elf_Internal_Sym * elf_sym;
- int type;
-{
- switch (ELF_ST_TYPE (elf_sym->st_info))
- {
- case STT_ARM_TFUNC:
- return ELF_ST_TYPE (elf_sym->st_info);
-
- case STT_ARM_16BIT:
- /* If the symbol is not an object, return the STT_ARM_16BIT flag.
- This allows us to distinguish between data used by Thumb instructions
- and non-data (which is probably code) inside Thumb regions of an
- executable. */
- if (type != STT_OBJECT)
- return ELF_ST_TYPE (elf_sym->st_info);
- break;
-
- default:
- break;
- }
-
- return type;
-}
-
-static asection *
-elf32_arm_gc_mark_hook (sec, info, rel, h, sym)
- asection *sec;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- 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_ARM_GNU_VTINHERIT:
- case R_ARM_GNU_VTENTRY:
- break;
-
- default:
- switch (h->root.type)
- {
- case bfd_link_hash_defined:
- case bfd_link_hash_defweak:
- return h->root.u.def.section;
-
- case bfd_link_hash_common:
- return h->root.u.c.p->section;
-
- default:
- break;
- }
- }
- }
- else
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
-
- return NULL;
-}
-
-/* Update the got entry reference counts for the section being removed. */
-
-static bfd_boolean
-elf32_arm_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
-{
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- bfd_signed_vma *local_got_refcounts;
- const Elf_Internal_Rela *rel, *relend;
- unsigned long r_symndx;
- struct elf_link_hash_entry *h;
-
- 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++)
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_ARM_GOT32:
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx >= symtab_hdr->sh_info)
- {
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (h->got.refcount > 0)
- h->got.refcount -= 1;
- }
- else if (local_got_refcounts != NULL)
- {
- if (local_got_refcounts[r_symndx] > 0)
- local_got_refcounts[r_symndx] -= 1;
- }
- break;
-
- case R_ARM_ABS32:
- case R_ARM_REL32:
- case R_ARM_PC24:
- case R_ARM_PLT32:
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx >= symtab_hdr->sh_info)
- {
- struct elf32_arm_link_hash_entry *eh;
- struct elf32_arm_relocs_copied **pp;
- struct elf32_arm_relocs_copied *p;
-
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
-
- if (h->plt.refcount > 0)
- h->plt.refcount -= 1;
-
- if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
- || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
- {
- eh = (struct elf32_arm_link_hash_entry *) h;
-
- for (pp = &eh->relocs_copied; (p = *pp) != NULL;
- pp = &p->next)
- if (p->section == sec)
- {
- p->count -= 1;
- if (p->count == 0)
- *pp = p->next;
- break;
- }
- }
- }
- break;
-
- default:
- break;
- }
-
- return TRUE;
-}
-
-/* Look through the relocs for a section during the first phase. */
-
-static bfd_boolean
-elf32_arm_check_relocs (abfd, info, sec, 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;
- struct elf_link_hash_entry **sym_hashes_end;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
- bfd *dynobj;
- asection *sreloc;
- bfd_vma *local_got_offsets;
- struct elf32_arm_link_hash_table *htab;
-
- if (info->relocatable)
- return TRUE;
-
- htab = elf32_arm_hash_table (info);
- sreloc = NULL;
-
- dynobj = elf_hash_table (info)->dynobj;
- local_got_offsets = elf_local_got_offsets (abfd);
-
- 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;
-
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- struct elf_link_hash_entry *h;
- unsigned long r_symndx;
-
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
-
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_ARM_GOT32:
- /* This symbol requires a global offset table entry. */
- if (h != NULL)
- {
- h->got.refcount++;
- }
- 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) + sizeof(char));
- local_got_refcounts = ((bfd_signed_vma *)
- 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;
-
- case R_ARM_GOTOFF:
- case R_ARM_GOTPC:
- if (htab->sgot == NULL)
- {
- if (htab->root.dynobj == NULL)
- htab->root.dynobj = abfd;
- if (!create_got_section (htab->root.dynobj, info))
- return FALSE;
- }
- break;
-
- case R_ARM_ABS32:
- case R_ARM_REL32:
- case R_ARM_PC24:
- case R_ARM_PLT32:
- if (h != NULL)
- {
- /* If this reloc is in a read-only section, we might
- need a copy reloc. We can't check reliably at this
- stage whether the section is read-only, as input
- sections have not yet been mapped to output sections.
- Tentatively set the flag for now, and correct in
- adjust_dynamic_symbol. */
- if (!info->shared)
- h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
-
- /* We may need a .plt entry if the function this reloc
- refers to is in a different object. */
- if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24
- || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32)
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
-
- h->plt.refcount += 1;
- }
-
- /* If we are creating a shared library, and this is a reloc
- against a global symbol, or a non PC relative reloc
- against a local symbol, then we need to copy the reloc
- into the shared library. However, if we are linking with
- -Bsymbolic, we do not need to copy a reloc against a
- global symbol which is defined in an object we are
- including in the link (i.e., DEF_REGULAR is set). At
- this point we have not seen all the input files, so it is
- possible that DEF_REGULAR is not set now but will be set
- later (it is never cleared). We account for that
- possibility below by storing information in the
- relocs_copied field of the hash table entry. */
- if (info->shared
- && (sec->flags & SEC_ALLOC) != 0
- && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24
- && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32)
- || (h != NULL
- && (! info->symbolic
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))))
- {
- struct elf32_arm_relocs_copied *p, **head;
-
- /* When creating a shared object, we must copy these
- reloc types into the output file. We create a reloc
- section in dynobj and make room for this reloc. */
- if (sreloc == NULL)
- {
- const char * name;
-
- name = (bfd_elf_string_from_elf_section
- (abfd,
- elf_elfheader (abfd)->e_shstrndx,
- elf_section_data (sec)->rel_hdr.sh_name));
- if (name == NULL)
- return FALSE;
-
- BFD_ASSERT (strncmp (name, ".rel", 4) == 0
- && strcmp (bfd_get_section_name (abfd, sec),
- name + 4) == 0);
-
- sreloc = bfd_get_section_by_name (dynobj, name);
- if (sreloc == NULL)
- {
- flagword flags;
-
- sreloc = bfd_make_section (dynobj, name);
- flags = (SEC_HAS_CONTENTS | SEC_READONLY
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- if ((sec->flags & SEC_ALLOC) != 0)
- flags |= SEC_ALLOC | SEC_LOAD;
- if (sreloc == NULL
- || ! bfd_set_section_flags (dynobj, sreloc, flags)
- || ! bfd_set_section_alignment (dynobj, sreloc, 2))
- return FALSE;
- }
-
- elf_section_data (sec)->sreloc = sreloc;
- }
-
- /* If this is a global symbol, we count the number of
- relocations we need for this symbol. */
- if (h != NULL)
- {
- head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied;
- }
- else
- {
- /* Track dynamic relocs needed for local syms too.
- We really need local syms available to do this
- easily. Oh well. */
-
- asection *s;
- s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
- sec, r_symndx);
- if (s == NULL)
- return FALSE;
-
- head = ((struct elf32_arm_relocs_copied **)
- &elf_section_data (s)->local_dynrel);
- }
-
- p = *head;
- if (p == NULL || p->section != sec)
- {
- bfd_size_type amt = sizeof *p;
- p = bfd_alloc (htab->root.dynobj, amt);
- if (p == NULL)
- return FALSE;
- p->next = *head;
- *head = p;
- p->section = sec;
- p->count = 0;
- }
-
- if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32
- || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32)
- p->count += 1;
- }
- break;
-
- /* This relocation describes the C++ object vtable hierarchy.
- Reconstruct it for later use during GC. */
- case R_ARM_GNU_VTINHERIT:
- if (!_bfd_elf32_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_ARM_GNU_VTENTRY:
- if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset))
- return FALSE;
- break;
- }
- }
-
- return TRUE;
-}
-
-/* Find the nearest line to a particular section and offset, for error
- reporting. This code is a duplicate of the code in elf.c, except
- that it also accepts STT_ARM_TFUNC as a symbol that names a function. */
-
-static bfd_boolean
-elf32_arm_find_nearest_line
- (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr)
- bfd *abfd;
- asection *section;
- asymbol **symbols;
- bfd_vma offset;
- const char **filename_ptr;
- const char **functionname_ptr;
- unsigned int *line_ptr;
-{
- bfd_boolean found;
- const char *filename;
- asymbol *func;
- bfd_vma low_func;
- asymbol **p;
-
- if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset,
- filename_ptr, functionname_ptr,
- line_ptr, 0,
- &elf_tdata (abfd)->dwarf2_find_line_info))
- return TRUE;
-
- if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset,
- &found, filename_ptr,
- functionname_ptr, line_ptr,
- &elf_tdata (abfd)->line_info))
- return FALSE;
-
- if (found)
- return TRUE;
-
- if (symbols == NULL)
- return FALSE;
-
- filename = NULL;
- func = NULL;
- low_func = 0;
-
- for (p = symbols; *p != NULL; p++)
- {
- elf_symbol_type *q;
-
- q = (elf_symbol_type *) *p;
-
- if (bfd_get_section (&q->symbol) != section)
- continue;
-
- switch (ELF_ST_TYPE (q->internal_elf_sym.st_info))
- {
- default:
- break;
- case STT_FILE:
- filename = bfd_asymbol_name (&q->symbol);
- break;
- case STT_NOTYPE:
- case STT_FUNC:
- case STT_ARM_TFUNC:
- if (q->symbol.section == section
- && q->symbol.value >= low_func
- && q->symbol.value <= offset)
- {
- func = (asymbol *) q;
- low_func = q->symbol.value;
- }
- break;
- }
- }
-
- if (func == NULL)
- return FALSE;
-
- *filename_ptr = filename;
- *functionname_ptr = bfd_asymbol_name (func);
- *line_ptr = 0;
-
- return TRUE;
-}
-
-/* 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
-elf32_arm_adjust_dynamic_symbol (info, h)
- struct bfd_link_info * info;
- struct elf_link_hash_entry * h;
-{
- bfd * dynobj;
- asection * s;
- unsigned int power_of_two;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- /* Make sure we know what is going on here. */
- BFD_ASSERT (dynobj != NULL
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
- || h->weakdef != NULL
- || ((h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)));
-
- /* 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->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
- {
- if (h->plt.refcount <= 0
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
- {
- /* This case can occur if we saw a PLT32 reloc in an input
- file, but the symbol was never referred to by a dynamic
- object, or if all references were garbage collected. In
- such a case, we don't actually need to build a procedure
- linkage table, and we can just do a PC24 reloc instead. */
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
-
- return TRUE;
- }
- else
- /* It's possible that we incorrectly decided a .plt reloc was
- needed for an R_ARM_PC24 reloc to a non-function sym in
- check_relocs. We can't decide accurately between function and
- non-function syms in check-relocs; Objects loaded later in
- the link may change h->type. So fix it now. */
- 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->weakdef != NULL)
- {
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
- || h->weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->weakdef->root.u.def.section;
- h->root.u.def.value = h->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;
-
- /* 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. */
- s = bfd_get_section_by_name (dynobj, ".dynbss");
- BFD_ASSERT (s != NULL);
-
- /* We must generate a R_ARM_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
- .rel.bss section we are going to use. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
- {
- asection *srel;
-
- srel = bfd_get_section_by_name (dynobj, ".rel.bss");
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf32_External_Rel);
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
- }
-
- /* We need to figure out the alignment required for this symbol. I
- have no idea how ELF linkers handle this. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 3)
- power_of_two = 3;
-
- /* Apply the required alignment. */
- s->_raw_size = BFD_ALIGN (s->_raw_size,
- (bfd_size_type) (1 << power_of_two));
- if (power_of_two > bfd_get_section_alignment (dynobj, s))
- {
- if (! bfd_set_section_alignment (dynobj, s, power_of_two))
- return FALSE;
- }
-
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->_raw_size;
-
- /* Increment the section size to make room for the symbol. */
- s->_raw_size += h->size;
-
- return TRUE;
-}
-
-/* Allocate space in .plt, .got and associated reloc sections for
- dynamic relocs. */
-
-static bfd_boolean
-allocate_dynrelocs (h, inf)
- struct elf_link_hash_entry *h;
- PTR inf;
-{
- struct bfd_link_info *info;
- struct elf32_arm_link_hash_table *htab;
- struct elf32_arm_link_hash_entry *eh;
- struct elf32_arm_relocs_copied *p;
-
- if (h->root.type == bfd_link_hash_indirect)
- return TRUE;
-
- if (h->root.type == bfd_link_hash_warning)
- /* When warning symbols are created, they **replace** the "real"
- entry in the hash table, thus we never get to see the real
- symbol in a hash traversal. So look at it now. */
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
-
- info = (struct bfd_link_info *) inf;
- htab = elf32_arm_hash_table (info);
-
- 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->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
-
- if (info->shared
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
- {
- asection *s = htab->splt;
-
- /* If this is the first .plt entry, make room for the special
- first entry. */
- if (s->_raw_size == 0)
- s->_raw_size += PLT_HEADER_SIZE;
-
- h->plt.offset = s->_raw_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->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
- }
-
- /* Make room for this entry. */
- s->_raw_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->_raw_size += 4;
-
- /* We also need to make an entry in the .rel.plt section. */
- htab->srelplt->_raw_size += sizeof (Elf32_External_Rel);
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
-
- 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->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
-
- s = htab->sgot;
- h->got.offset = s->_raw_size;
- s->_raw_size += 4;
- dyn = htab->root.dynamic_sections_created;
- if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
- || h->root.type != bfd_link_hash_undefweak)
- && (info->shared
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
- htab->srelgot->_raw_size += sizeof (Elf32_External_Rel);
- }
- else
- h->got.offset = (bfd_vma) -1;
-
- eh = (struct elf32_arm_link_hash_entry *) h;
- if (eh->relocs_copied == 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)
- {
- /* Discard relocs on undefined weak syms with non-default
- visibility. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak)
- eh->relocs_copied = NULL;
- }
- 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->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
- && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- || (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->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- {
- if (! bfd_elf32_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->relocs_copied = NULL;
-
- keep: ;
- }
-
- /* Finally, allocate space. */
- for (p = eh->relocs_copied; p != NULL; p = p->next)
- {
- asection *sreloc = elf_section_data (p->section)->sreloc;
- sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel);
- }
-
- return TRUE;
-}
-
-/* Set the sizes of the dynamic sections. */
-
-static bfd_boolean
-elf32_arm_size_dynamic_sections (output_bfd, info)
- bfd * output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info * info;
-{
- bfd * dynobj;
- asection * s;
- bfd_boolean plt;
- bfd_boolean relocs;
- bfd *ibfd;
- struct elf32_arm_link_hash_table *htab;
-
- htab = elf32_arm_hash_table (info);
- dynobj = elf_hash_table (info)->dynobj;
- BFD_ASSERT (dynobj != NULL);
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (info->executable)
- {
- s = bfd_get_section_by_name (dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->_raw_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;
- char *local_tls_type;
- 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 elf32_arm_relocs_copied *p;
-
- for (p = *((struct elf32_arm_relocs_copied **)
- &elf_section_data (s)->local_dynrel);
- p != NULL;
- p = p->next)
- {
- if (!bfd_is_abs_section (p->section)
- && bfd_is_abs_section (p->section->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->section)->sreloc;
- srel->_raw_size += p->count * sizeof (Elf32_External_Rel);
- if ((p->section->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, ++local_tls_type)
- {
- if (*local_got > 0)
- {
- *local_got = s->_raw_size;
- s->_raw_size += 4;
- if (info->shared)
- srel->_raw_size += sizeof (Elf32_External_Rel);
- }
- 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, (PTR) info);
-
- /* The check_relocs and adjust_dynamic_symbol entry points have
- determined the sizes of the various dynamic sections. Allocate
- memory for them. */
- plt = FALSE;
- relocs = FALSE;
- for (s = dynobj->sections; s != NULL; s = s->next)
- {
- const char * name;
- bfd_boolean strip;
-
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
-
- /* It's OK to base decisions on the section name, because none
- of the dynobj section names depend upon the input files. */
- name = bfd_get_section_name (dynobj, s);
-
- strip = FALSE;
-
- if (strcmp (name, ".plt") == 0)
- {
- if (s->_raw_size == 0)
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- strip = TRUE;
- }
- else
- {
- /* Remember whether there is a PLT. */
- plt = TRUE;
- }
- }
- else if (strncmp (name, ".rel", 4) == 0)
- {
- if (s->_raw_size == 0)
- {
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rel.bss and
- .rel.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. */
- strip = TRUE;
- }
- else
- {
- /* Remember whether there are any reloc sections other
- than .rel.plt. */
- if (strcmp (name, ".rel.plt") != 0)
- relocs = TRUE;
-
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
- }
- }
- else if (strncmp (name, ".got", 4) != 0)
- {
- /* It's not one of our sections, so don't allocate space. */
- continue;
- }
-
- if (strip)
- {
- _bfd_strip_section_from_output (info, s);
- continue;
- }
-
- /* Allocate memory for the section contents. */
- s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
- if (s->contents == NULL && s->_raw_size != 0)
- return FALSE;
- }
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Add some entries to the .dynamic section. We fill in the
- values later, in elf32_arm_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_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL))
-
- if (!info->shared)
- {
- if (!add_dynamic_entry (DT_DEBUG, 0))
- return FALSE;
- }
-
- if (plt)
- {
- if ( !add_dynamic_entry (DT_PLTGOT, 0)
- || !add_dynamic_entry (DT_PLTRELSZ, 0)
- || !add_dynamic_entry (DT_PLTREL, DT_REL)
- || !add_dynamic_entry (DT_JMPREL, 0))
- return FALSE;
- }
-
- if (relocs)
- {
- if ( !add_dynamic_entry (DT_REL, 0)
- || !add_dynamic_entry (DT_RELSZ, 0)
- || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
- return FALSE;
- }
-
- if ((info->flags & DF_TEXTREL) != 0)
- {
- if (!add_dynamic_entry (DT_TEXTREL, 0))
- return FALSE;
- info->flags |= DF_TEXTREL;
- }
- }
-#undef add_synamic_entry
-
- return TRUE;
-}
-
-/* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
-
-static bfd_boolean
-elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym)
- bfd * output_bfd;
- struct bfd_link_info * info;
- struct elf_link_hash_entry * h;
- Elf_Internal_Sym * sym;
-{
- bfd * dynobj;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- if (h->plt.offset != (bfd_vma) -1)
- {
- asection * splt;
- asection * sgot;
- asection * srel;
- bfd_vma plt_index;
- bfd_vma got_offset;
- Elf_Internal_Rela rel;
- bfd_byte *loc;
- bfd_vma got_displacement;
-
- /* This symbol has an entry in the procedure linkage table. Set
- it up. */
-
- BFD_ASSERT (h->dynindx != -1);
-
- splt = bfd_get_section_by_name (dynobj, ".plt");
- sgot = bfd_get_section_by_name (dynobj, ".got.plt");
- srel = bfd_get_section_by_name (dynobj, ".rel.plt");
- BFD_ASSERT (splt != NULL && sgot != NULL && srel != 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_HEADER_SIZE) / PLT_ENTRY_SIZE;
-
- /* 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;
-
- /* Calculate the displacement between the PLT slot and the
- entry in the GOT. */
- got_displacement = (sgot->output_section->vma
- + sgot->output_offset
- + got_offset
- - splt->output_section->vma
- - splt->output_offset
- - h->plt.offset
- - 8);
-
- BFD_ASSERT ((got_displacement & 0xf0000000) == 0);
-
- /* Fill in the entry in the procedure linkage table. */
- bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20),
- splt->contents + h->plt.offset + 0);
- bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12),
- splt->contents + h->plt.offset + 4);
- bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff),
- splt->contents + h->plt.offset + 8);
-#ifdef FOUR_WORD_PLT
- bfd_put_32 (output_bfd, elf32_arm_plt_entry[3],
- splt->contents + h->plt.offset + 12);
-#endif
-
- /* Fill in the entry in the global offset table. */
- bfd_put_32 (output_bfd,
- (splt->output_section->vma
- + splt->output_offset),
- sgot->contents + got_offset);
-
- /* Fill in the entry in the .rel.plt section. */
- rel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + got_offset);
- rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT);
- loc = srel->contents + plt_index * sizeof (Elf32_External_Rel);
- bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
-
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- /* If the symbol is weak, we do need to clear the value.
- Otherwise, the PLT entry would provide a definition for
- the symbol even if the symbol wasn't defined anywhere,
- and so the symbol would never be NULL. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
- == 0)
- sym->st_value = 0;
- }
- }
-
- if (h->got.offset != (bfd_vma) -1)
- {
- asection * sgot;
- asection * srel;
- Elf_Internal_Rela rel;
- bfd_byte *loc;
-
- /* This symbol has an entry in the global offset table. Set it
- up. */
- sgot = bfd_get_section_by_name (dynobj, ".got");
- srel = bfd_get_section_by_name (dynobj, ".rel.got");
- BFD_ASSERT (sgot != NULL && srel != NULL);
-
- rel.r_offset = (sgot->output_section->vma
- + sgot->output_offset
- + (h->got.offset &~ (bfd_vma) 1));
-
- /* If this is a static link, or it is a -Bsymbolic link and the
- symbol is defined locally or was forced to be local because
- of a version file, we just want to emit a RELATIVE reloc.
- The entry in the global offset table will already have been
- initialized in the relocate_section function. */
- if (info->shared
- && SYMBOL_REFERENCES_LOCAL (info, h))
- {
- BFD_ASSERT((h->got.offset & 1) != 0);
- rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE);
- }
- else
- {
- BFD_ASSERT((h->got.offset & 1) == 0);
- bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset);
- rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT);
- }
-
- loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel);
- bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
- }
-
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
- {
- asection * s;
- Elf_Internal_Rela rel;
- bfd_byte *loc;
-
- /* This symbol 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_section_by_name (h->root.u.def.section->owner,
- ".rel.bss");
- BFD_ASSERT (s != NULL);
-
- rel.r_offset = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY);
- loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel);
- bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
- }
-
- /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
- if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
- sym->st_shndx = SHN_ABS;
-
- return TRUE;
-}
-
-/* Finish up the dynamic sections. */
-
-static bfd_boolean
-elf32_arm_finish_dynamic_sections (output_bfd, info)
- bfd * output_bfd;
- struct bfd_link_info * info;
-{
- bfd * dynobj;
- asection * sgot;
- asection * sdyn;
-
- dynobj = elf_hash_table (info)->dynobj;
-
- sgot = bfd_get_section_by_name (dynobj, ".got.plt");
- BFD_ASSERT (sgot != NULL);
- sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- asection *splt;
- Elf32_External_Dyn *dyncon, *dynconend;
-
- splt = bfd_get_section_by_name (dynobj, ".plt");
- BFD_ASSERT (splt != NULL && sdyn != NULL);
-
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
-
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- const char * name;
- asection * s;
-
- bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
-
- switch (dyn.d_tag)
- {
- default:
- break;
-
- case DT_PLTGOT:
- name = ".got";
- goto get_vma;
- case DT_JMPREL:
- name = ".rel.plt";
- get_vma:
- s = bfd_get_section_by_name (output_bfd, name);
- 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 = bfd_get_section_by_name (output_bfd, ".rel.plt");
- BFD_ASSERT (s != NULL);
- if (s->_cooked_size != 0)
- dyn.d_un.d_val = s->_cooked_size;
- else
- dyn.d_un.d_val = s->_raw_size;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
-
- case DT_RELSZ:
- /* My reading of the SVR4 ABI indicates that the
- procedure linkage table relocs (DT_JMPREL) should be
- included in the overall relocs (DT_REL). This is
- what Solaris does. However, UnixWare can not handle
- that case. Therefore, we override the DT_RELSZ entry
- here to make it not include the JMPREL relocs. Since
- the linker script arranges for .rel.plt to follow all
- other relocation sections, we don't have to worry
- about changing the DT_REL entry. */
- s = bfd_get_section_by_name (output_bfd, ".rel.plt");
- if (s != NULL)
- {
- if (s->_cooked_size != 0)
- dyn.d_un.d_val -= s->_cooked_size;
- else
- dyn.d_un.d_val -= s->_raw_size;
- }
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- break;
-
- /* Set the bottom bit of DT_INIT/FINI if the
- corresponding function is Thumb. */
- case DT_INIT:
- name = info->init_function;
- goto get_sym;
- case DT_FINI:
- name = info->fini_function;
- get_sym:
- /* If it wasn't set by elf_bfd_final_link
- then there is nothing to adjust. */
- if (dyn.d_un.d_val != 0)
- {
- struct elf_link_hash_entry * eh;
-
- eh = elf_link_hash_lookup (elf_hash_table (info), name,
- FALSE, FALSE, TRUE);
- if (eh != (struct elf_link_hash_entry *) NULL
- && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC)
- {
- dyn.d_un.d_val |= 1;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- }
- }
- break;
- }
- }
-
- /* Fill in the first entry in the procedure linkage table. */
- if (splt->_raw_size > 0)
- {
- bfd_vma got_displacement;
-
- /* Calculate the displacement between the PLT slot and &GOT[0]. */
- got_displacement = (sgot->output_section->vma
- + sgot->output_offset
- - splt->output_section->vma
- - splt->output_offset
- - 16);
-
- bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
- bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
- bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
- bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
-#ifdef FOUR_WORD_PLT
- /* The displacement value goes in the otherwise-unused last word of
- the second entry. */
- bfd_put_32 (output_bfd, got_displacement, splt->contents + 28);
-#else
- bfd_put_32 (output_bfd, got_displacement, splt->contents + 16);
-#endif
- }
-
- /* UnixWare sets the entsize of .plt to 4, although that doesn't
- really seem like the right value. */
- elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4;
- }
-
- /* Fill in the first three entries in the global offset table. */
- if (sgot->_raw_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);
- }
-
- elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
-
- return TRUE;
-}
-
-static void
-elf32_arm_post_process_headers (abfd, link_info)
- bfd * abfd;
- struct bfd_link_info * link_info ATTRIBUTE_UNUSED;
-{
- Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
-
- i_ehdrp = elf_elfheader (abfd);
-
- i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION;
- i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION;
-}
-
-static enum elf_reloc_type_class
-elf32_arm_reloc_type_class (rela)
- const Elf_Internal_Rela *rela;
-{
- switch ((int) ELF32_R_TYPE (rela->r_info))
- {
- case R_ARM_RELATIVE:
- return reloc_class_relative;
- case R_ARM_JUMP_SLOT:
- return reloc_class_plt;
- case R_ARM_COPY:
- return reloc_class_copy;
- default:
- return reloc_class_normal;
- }
-}
-
-static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, Elf_Internal_Shdr *));
-static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean));
-
-/* Set the right machine number for an Arm ELF file. */
-
-static bfd_boolean
-elf32_arm_section_flags (flags, hdr)
- flagword *flags;
- Elf_Internal_Shdr *hdr;
-{
- if (hdr->sh_type == SHT_NOTE)
- *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS;
-
- return TRUE;
-}
-
-void
-elf32_arm_final_write_processing (abfd, linker)
- bfd *abfd;
- bfd_boolean linker ATTRIBUTE_UNUSED;
-{
- bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
-}
-
-#define ELF_ARCH bfd_arch_arm
-#define ELF_MACHINE_CODE EM_ARM
-#ifdef __QNXTARGET__
-#define ELF_MAXPAGESIZE 0x1000
-#else
-#define ELF_MAXPAGESIZE 0x8000
-#endif
-
-#define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data
-#define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data
-#define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags
-#define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data
-#define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create
-#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup
-#define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line
-
-#define elf_backend_get_symbol_type elf32_arm_get_symbol_type
-#define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook
-#define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook
-#define elf_backend_check_relocs elf32_arm_check_relocs
-#define elf_backend_relocate_section elf32_arm_relocate_section
-#define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol
-#define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections
-#define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol
-#define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections
-#define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections
-#define elf_backend_post_process_headers elf32_arm_post_process_headers
-#define elf_backend_reloc_type_class elf32_arm_reloc_type_class
-#define elf_backend_object_p elf32_arm_object_p
-#define elf_backend_section_flags elf32_arm_section_flags
-#define elf_backend_final_write_processing elf32_arm_final_write_processing
-#define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol
-
-#define elf_backend_can_refcount 1
-#define elf_backend_can_gc_sections 1
-#define elf_backend_plt_readonly 1
-#define elf_backend_want_got_plt 1
-#define elf_backend_want_plt_sym 0
-#if !USE_REL
-#define elf_backend_rela_normal 1
-#endif
-
-#define elf_backend_got_header_size 12
-
-#include "elf32-target.h"
-
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
+
+
+/* ARM VFP11 erratum workaround support. */
+typedef enum
+{
+ BFD_ARM_VFP11_FIX_DEFAULT,
+ BFD_ARM_VFP11_FIX_NONE,
+ BFD_ARM_VFP11_FIX_SCALAR,
+ BFD_ARM_VFP11_FIX_VECTOR
+} bfd_arm_vfp11_fix;
+
+extern void bfd_elf32_arm_init_maps
+ (bfd *);
+
+extern void bfd_elf32_arm_set_vfp11_fix
+ (bfd *, struct bfd_link_info *);
+
+extern void bfd_elf32_arm_set_cortex_a8_fix
+ (bfd *, struct bfd_link_info *);
+
+extern bfd_boolean bfd_elf32_arm_vfp11_erratum_scan
+ (bfd *, struct bfd_link_info *);
+
+extern void bfd_elf32_arm_vfp11_fix_veneer_locations
+ (bfd *, struct bfd_link_info *);
+
+/* ARM STM STM32L4XX erratum workaround support. */
+typedef enum
+{
+ BFD_ARM_STM32L4XX_FIX_NONE,
+ BFD_ARM_STM32L4XX_FIX_DEFAULT,
+ BFD_ARM_STM32L4XX_FIX_ALL
+} bfd_arm_stm32l4xx_fix;
+
+extern void bfd_elf32_arm_set_stm32l4xx_fix
+ (bfd *, struct bfd_link_info *);
+
+extern bfd_boolean bfd_elf32_arm_stm32l4xx_erratum_scan
+ (bfd *, struct bfd_link_info *);
+
+extern void bfd_elf32_arm_stm32l4xx_fix_veneer_locations
+ (bfd *, struct bfd_link_info *);
+
+/* ELF ARM Interworking support. Called from linker. */
+extern bfd_boolean bfd_elf32_arm_allocate_interworking_sections
+ (struct bfd_link_info *);
+
+extern bfd_boolean bfd_elf32_arm_process_before_allocation
+ (bfd *, struct bfd_link_info *);
+
+struct elf32_arm_params {
+ char *thumb_entry_symbol;
+ int byteswap_code;
+ int target1_is_rel;
+ char * target2_type;
+ int fix_v4bx;
+ int use_blx;
+ bfd_arm_vfp11_fix vfp11_denorm_fix;
+ bfd_arm_stm32l4xx_fix stm32l4xx_fix;
+ int no_enum_size_warning;
+ int no_wchar_size_warning;
+ int pic_veneer;
+ int fix_cortex_a8;
+ int fix_arm1176;
+ int merge_exidx_entries;
+ int cmse_implib;
+ bfd *in_implib_bfd;
+};
+
+void bfd_elf32_arm_set_target_params
+ (bfd *, struct bfd_link_info *, struct elf32_arm_params *);
+
+extern bfd_boolean bfd_elf32_arm_get_bfd_for_interworking
+ (bfd *, struct bfd_link_info *);
+
+extern bfd_boolean bfd_elf32_arm_add_glue_sections_to_bfd
+ (bfd *, struct bfd_link_info *);
+
+extern void bfd_elf32_arm_keep_private_stub_output_sections
+ (struct bfd_link_info *);
+
+extern void bfd_elf32_arm_set_byteswap_code
+ (struct bfd_link_info *, int);
+
+extern void bfd_elf32_arm_use_long_plt (void);
+
+/* ARM stub generation support. Called from the linker. */
+extern int elf32_arm_setup_section_lists
+ (bfd *, struct bfd_link_info *);
+extern void elf32_arm_next_input_section
+ (struct bfd_link_info *, struct bfd_section *);
+extern bfd_boolean elf32_arm_size_stubs
+ (bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
+ struct bfd_section * (*) (const char *, struct bfd_section *,
+ struct bfd_section *, unsigned int),
+ void (*) (void));
+extern bfd_boolean elf32_arm_build_stubs
+ (struct bfd_link_info *);
+
+/* ARM unwind section editing support. */
+extern bfd_boolean elf32_arm_fix_exidx_coverage
+(struct bfd_section **, unsigned int, struct bfd_link_info *, bfd_boolean);
projects / thirdparty / binutils-gdb.git / blobdiff