| /* 32-bit ELF support for ARM |
| Copyright 1998, 1999, 2000, 2001, 2002, 2003 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 |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| 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 |
| && splt != NULL |
| && h->plt.offset != (bfd_vma) -1) |
| { |
| /* If we've created a .plt section, and assigned a PLT entry to |
| this function, it should not be known to bind locally. If |
| it were, we would have cleared the PLT entry. */ |
| 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. We can't tell for |
| sure yet, because something later might force the |
| symbol local. */ |
| 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" |
| |