diff options
Diffstat (limited to 'bfd/elf32-arm.c')
| -rw-r--r-- | bfd/elf32-arm.c | 2049 |
1 files changed, 0 insertions, 2049 deletions
diff --git a/bfd/elf32-arm.c b/bfd/elf32-arm.c deleted file mode 100644 index 70000bd..0000000 --- a/bfd/elf32-arm.c +++ /dev/null @@ -1,2049 +0,0 @@ -/* 32-bit ELF support for ARM - Copyright 1993, 1995, 1998 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. */ - -#include "bfd.h" -#include "sysdep.h" -#include "libbfd.h" -#include "elf-bfd.h" - -#include "elf/arm.h" - -typedef unsigned long int insn32; -typedef unsigned short int insn16; - -static reloc_howto_type *elf32_arm_reloc_type_lookup - PARAMS ((bfd * abfd, bfd_reloc_code_real_type code)); -static void elf32_arm_info_to_howto - PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *)); -static boolean elf32_arm_set_private_flags - PARAMS ((bfd *, flagword)); -static boolean elf32_arm_copy_private_bfd_data - PARAMS ((bfd *, bfd *)); -static boolean elf32_arm_merge_private_bfd_data - PARAMS ((bfd *, bfd *)); -static 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 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 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 *)); - -/* 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 INTERWORK_FLAG( abfd ) (elf_elfheader (abfd)->e_flags & EF_INTERWORK) - -#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" - -/* 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 containg the Thumb-to-ARM glue. */ - long int thumb_glue_size; - - /* The size in bytes of the section containg the ARM-to-Thumb glue. */ - long int arm_glue_size; - - /* An arbitary input BFD chosen to hold the glue sections. */ - bfd *bfd_of_glue_owner; - - }; - - - -/* 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; - - ret = ((struct elf32_arm_link_hash_table *) - bfd_alloc (abfd, sizeof (struct elf32_arm_link_hash_table))); - if (ret == (struct elf32_arm_link_hash_table *) NULL) - return NULL; - - if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, - _bfd_elf_link_hash_newfunc)) - { - bfd_release (abfd, ret); - return NULL; - } - - ret->thumb_glue_size = 0; - ret->arm_glue_size = 0; - ret->bfd_of_glue_owner = NULL; - - return &ret->root.root; -} - -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 (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_get_filename (input_bfd), tmp_name, name); - - free (tmp_name); - - return hash; -} - -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 (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_get_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; - -static const insn16 t2a1_push_insn = 0xb540; -static const insn16 t2a2_ldr_insn = 0x4e03; -static const insn16 t2a3_mov_insn = 0x46fe; -static const insn16 t2a4_bx_insn = 0x4730; -static const insn32 t2a5_pop_insn = 0xe8bd4040; -static const insn32 t2a6_bx_insn = 0xe12fff1e; - -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; - register asection *s; - char *tmp_name; - struct elf_link_hash_entry *myh; - struct elf32_arm_link_hash_table *globals; - - 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 (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) - { - free (tmp_name); - return; /* we've already seen this guy */ - } - - /* 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. */ - - _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, tmp_name, - BSF_GLOBAL, - s, globals->arm_glue_size + 1, - NULL, true, false, - (struct bfd_link_hash_entry **) &myh); - - 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; - register asection *s; - char *tmp_name; - struct elf_link_hash_entry *myh; - struct elf32_arm_link_hash_table *hash_table; - char bind; - - 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 (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) - { - free (tmp_name); - return; /* we've already seen this guy */ - } - - _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name, - BSF_GLOBAL, s, hash_table->thumb_glue_size + 1, - NULL, true, false, - (struct bfd_link_hash_entry **) &myh); - - /* If we mark it 'thumb', the disassembler will do a better job. */ - bind = ELF_ST_BIND (myh->type); - myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC); - - free (tmp_name); - - /* Allocate another symbol to mark where we switch to arm mode. */ - -#define CHANGE_TO_ARM "__%s_change_to_arm" -#define BACK_FROM_ARM "__%s_back_from_arm" - - tmp_name = (char *) bfd_malloc (strlen (name) + strlen (CHANGE_TO_ARM) + 1); - - BFD_ASSERT (tmp_name); - - sprintf (tmp_name, CHANGE_TO_ARM, name); - - myh = NULL; - - _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, tmp_name, - BSF_LOCAL, s, hash_table->thumb_glue_size + 4, - NULL, true, false, - (struct bfd_link_hash_entry **) &myh); - - free (tmp_name); - - hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; - - return; -} - -/* 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 */ -boolean -bfd_elf32_arm_get_bfd_for_interworking (abfd, info) - bfd *abfd; - struct bfd_link_info *info; -{ - struct elf32_arm_link_hash_table *globals; - flagword flags; - asection *sec; - - /* If we are only performing a partial link do not bother - getting a bfd to hold the glue. */ - if (info->relocateable) - return true; - - globals = elf32_arm_hash_table (info); - - BFD_ASSERT (globals != NULL); - - if (globals->bfd_of_glue_owner != NULL) - return true; - - sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); - - if (sec == NULL) - { - flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY; - - 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; - } - - 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 = 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; - } - - /* Save the bfd for later use. */ - globals->bfd_of_glue_owner = abfd; - - return true; -} - -boolean -bfd_elf32_arm_process_before_allocation (abfd, link_info) - bfd *abfd; - struct bfd_link_info *link_info; -{ - Elf_Internal_Shdr *symtab_hdr; - Elf_Internal_Rela *free_relocs = NULL; - Elf_Internal_Rela *irel, *irelend; - bfd_byte *contents = NULL; - bfd_byte *free_contents = NULL; - Elf32_External_Sym *extsyms = NULL; - Elf32_External_Sym *free_extsyms = 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->relocateable) - 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); - - /* 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. */ - - irel = (_bfd_elf32_link_read_relocs (abfd, sec, (PTR) NULL, - (Elf_Internal_Rela *) NULL, false)); - - BFD_ASSERT (irel != 0); - - irelend = irel + sec->reloc_count; - for (; irel < irelend; irel++) - { - long r_type; - unsigned long r_index; - unsigned char code; - - 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; - free_contents = contents; - - if (!bfd_get_section_contents (abfd, sec, contents, - (file_ptr) 0, sec->_raw_size)) - goto error_return; - } - } - - /* Read this BFD's symbols if we haven't done so already. */ - if (extsyms == NULL) - { - /* Get cached copy if it exists. */ - if (symtab_hdr->contents != NULL) - extsyms = (Elf32_External_Sym *) symtab_hdr->contents; - else - { - /* Go get them off disk. */ - extsyms = ((Elf32_External_Sym *) - bfd_malloc (symtab_hdr->sh_size)); - if (extsyms == NULL) - goto error_return; - free_extsyms = extsyms; - if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0 - || (bfd_read (extsyms, 1, symtab_hdr->sh_size, abfd) - != symtab_hdr->sh_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; - } - } - } - - return true; -error_return: - if (free_relocs != NULL) - free (free_relocs); - if (free_contents != NULL) - free (free_contents); - if (free_extsyms != NULL) - free (free_extsyms); - return false; - -} - -#define USE_RELA -#define TARGET_UNDERSCORE '_' - -static reloc_howto_type elf32_arm_howto_table[] = -{ - /* No relocation */ - HOWTO (R_ARM_NONE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_NONE", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_PC24, /* type */ - 2, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 24, /* bitsize */ - true, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_PC24", /* name */ - false, /* partial_inplace */ - 0x00ffffff, /* src_mask */ - 0x00ffffff, /* dst_mask */ - true), /* pcrel_offset */ - - /* 32 bit absolute */ - HOWTO (R_ARM_ABS32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_ABS32", /* name */ - false, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - false), /* pcrel_offset */ - - /* standard 32bit pc-relative reloc */ - HOWTO (R_ARM_REL32, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 32, /* bitsize */ - true, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_REL32", /* name */ - false, /* partial_inplace */ - 0xffffffff, /* src_mask */ - 0xffffffff, /* dst_mask */ - true), /* pcrel_offset */ - - /* 8 bit absolute */ - HOWTO (R_ARM_ABS8, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_ABS8", /* name */ - false, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - false), /* pcrel_offset */ - - /* 16 bit absolute */ - HOWTO (R_ARM_ABS16, /* type */ - 0, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 16, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_ABS16", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - /* 12 bit absolute */ - HOWTO (R_ARM_ABS12, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 12, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_ABS12", /* name */ - false, /* partial_inplace */ - 0x000008ff, /* src_mask */ - 0x000008ff, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_THM_ABS5, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 5, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_bitfield, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_THM_ABS5", /* name */ - false, /* partial_inplace */ - 0x000007e0, /* src_mask */ - 0x000007e0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_THM_PC22, /* type */ - 1, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 22, /* bitsize */ - true, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_THM_PC22", /* name */ - false, /* partial_inplace */ - 0x07ff07ff, /* src_mask */ - 0x07ff07ff, /* dst_mask */ - true), /* pcrel_offset */ - - HOWTO (R_ARM_SBREL32, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_SBREL32", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_AMP_VCALL9, /* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - true, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_AMP_VCALL9", /* name */ - false, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - true), /* pcrel_offset */ - - /* 12 bit pc relative */ - HOWTO (R_ARM_THM_PC11, /* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 11, /* bitsize */ - true, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_THM_PC11", /* name */ - false, /* partial_inplace */ - 0x000007ff, /* src_mask */ - 0x000007ff, /* dst_mask */ - true), /* pcrel_offset */ - - /* 12 bit pc relative */ - HOWTO (R_ARM_THM_PC9, /* type */ - 1, /* rightshift */ - 1, /* size (0 = byte, 1 = short, 2 = long) */ - 8, /* bitsize */ - true, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_signed, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_THM_PC9", /* name */ - false, /* partial_inplace */ - 0x000000ff, /* src_mask */ - 0x000000ff, /* dst_mask */ - true), /* pcrel_offset */ - - /* GNU extension to record C++ vtable hierarchy */ - HOWTO (R_ARM_GNU_VTINHERIT, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - NULL, /* special_function */ - "R_ARM_GNU_VTINHERIT", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - /* GNU extension to record C++ vtable member usage */ - HOWTO (R_ARM_GNU_VTENTRY, /* type */ - 0, /* rightshift */ - 2, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - _bfd_elf_rel_vtable_reloc_fn, /* special_function */ - "R_ARM_GNU_VTENTRY", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - - HOWTO (R_ARM_RREL32, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_RREL32", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_RABS32, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_RABS32", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_RPC24, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_RPC24", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - - HOWTO (R_ARM_RBASE, /* type */ - 0, /* rightshift */ - 0, /* size (0 = byte, 1 = short, 2 = long) */ - 0, /* bitsize */ - false, /* pc_relative */ - 0, /* bitpos */ - complain_overflow_dont, /* complain_on_overflow */ - bfd_elf_generic_reloc, /* special_function */ - "R_ARM_RBASE", /* name */ - false, /* partial_inplace */ - 0, /* src_mask */ - 0, /* dst_mask */ - false), /* pcrel_offset */ - -}; -struct elf32_arm_reloc_map - { - unsigned char bfd_reloc_val; - unsigned char elf_reloc_val; - }; - -static const struct elf32_arm_reloc_map elf32_arm_reloc_map[] = -{ - {BFD_RELOC_NONE, R_ARM_NONE,}, - {BFD_RELOC_ARM_PCREL_BRANCH, R_ARM_PC24,}, - {BFD_RELOC_32, R_ARM_ABS32,}, - {BFD_RELOC_32_PCREL, R_ARM_REL32,}, - {BFD_RELOC_8, R_ARM_ABS8,}, - {BFD_RELOC_16, R_ARM_ABS16,}, - {BFD_RELOC_ARM_OFFSET_IMM, R_ARM_ABS12,}, - {BFD_RELOC_ARM_THUMB_OFFSET, R_ARM_THM_ABS5,}, - {BFD_RELOC_THUMB_PCREL_BRANCH23, R_ARM_THM_PC22,}, - {BFD_RELOC_VTABLE_INHERIT, R_ARM_GNU_VTINHERIT }, - {BFD_RELOC_VTABLE_ENTRY, R_ARM_GNU_VTENTRY }, - {BFD_RELOC_NONE, R_ARM_SBREL32,}, - {BFD_RELOC_NONE, R_ARM_AMP_VCALL9,}, - {BFD_RELOC_THUMB_PCREL_BRANCH12, R_ARM_THM_PC11,}, - {BFD_RELOC_THUMB_PCREL_BRANCH9, R_ARM_THM_PC9,} -}; - -static reloc_howto_type * -elf32_arm_reloc_type_lookup (abfd, code) - bfd *abfd; - bfd_reloc_code_real_type code; -{ - unsigned int i; - - for (i = 0; - i < sizeof (elf32_arm_reloc_map) / sizeof (struct elf32_arm_reloc_map); - i++) - { - if (elf32_arm_reloc_map[i].bfd_reloc_val == code) - return &elf32_arm_howto_table[elf32_arm_reloc_map[i].elf_reloc_val]; - } - - return NULL; -} - -static void -elf32_arm_info_to_howto (abfd, bfd_reloc, elf_reloc) - bfd *abfd; - arelent *bfd_reloc; - Elf32_Internal_Rela *elf_reloc; -{ - unsigned int r_type; - - r_type = ELF32_R_TYPE (elf_reloc->r_info); - /* fixme: need range test */ - /* BFD_ASSERT (r_type < (unsigned int) R_ELF32_ARM_MAX); */ - bfd_reloc->howto = &elf32_arm_howto_table[r_type]; -} - -/* 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 (identifed 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 - abort (); /* error - not a valid branch instruction form */ - - /* FIXME: abort is probably not the right call. krk@cygnus.com */ - - return br_insn; -} - -/* Thumb code calling an ARM function */ -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; - char *name; - bfd *input_bfd; - bfd *output_bfd; - asection *input_section; - bfd_byte *hit_data; - asection *sym_sec; - int offset; - int addend; - bfd_vma val; -{ - asection *s = 0; - long int 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_get_filename (sym_sec->owner), name); - _bfd_error_handler - (_ (" first occurrence: %s: thumb call to arm"), - bfd_get_filename (input_bfd)); - - return false; - } - - --my_offset; - myh->root.u.def.value = my_offset; - - bfd_put_16 (output_bfd, t2a1_bx_pc_insn, - s->contents + my_offset); - - bfd_put_16 (output_bfd, t2a2_noop_insn, - s->contents + my_offset + 2); - - ret_offset = - ((bfd_signed_vma) val) /* Address of destination of the stub */ - - ((bfd_signed_vma) - (s->output_offset /* Offset from the start of the current section to the start of the stubs. */ - + my_offset /* Offset of the start of this stub from the start of the stubs. */ - + s->output_section->vma) /* Address of the start of the current section. */ - + 4 /* The branch instruction is 4 bytes into the stub. */ - + 8); /* ARM branches work from the pc of the instruction + 8. */ - - bfd_put_32 (output_bfd, - 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 = - s->output_offset - + my_offset - - (input_section->output_offset - + offset + addend) - - 4; - - tmp = bfd_get_32 (input_bfd, hit_data - - input_section->vma); - - bfd_put_32 (output_bfd, - insert_thumb_branch (tmp, ret_offset), - hit_data - input_section->vma); - - return true; -} - -/* Arm code calling a Thumb function */ -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; - char *name; - bfd *input_bfd; - bfd *output_bfd; - asection *input_section; - bfd_byte *hit_data; - asection *sym_sec; - int offset; - int addend; - bfd_vma val; -{ - unsigned long int tmp; - long int 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_get_filename (sym_sec->owner), name); - _bfd_error_handler - (_ (" first occurrence: %s: arm call to thumb"), - bfd_get_filename (input_bfd)); - } - --my_offset; - myh->root.u.def.value = my_offset; - - bfd_put_32 (output_bfd, a2t1_ldr_insn, - s->contents + my_offset); - - bfd_put_32 (output_bfd, 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, tmp, hit_data - - input_section->vma); - - - return true; -} - -/* 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, offset, value, - addend, info, sym_sec, sym_name, sym_flags) - reloc_howto_type *howto; - bfd *input_bfd; - bfd *output_bfd; - asection *input_section; - bfd_byte *contents; - bfd_vma offset; - bfd_vma value; - bfd_vma addend; - struct bfd_link_info *info; - asection *sym_sec; - const char *sym_name; - unsigned char sym_flags; -{ - unsigned long r_type = howto->type; - bfd_byte *hit_data = contents + offset; - - switch (r_type) - { - - case R_ARM_NONE: - return bfd_reloc_ok; - - case R_ARM_PC24: - /* Arm B/BL instruction */ - - /* 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, offset, addend, value); - return bfd_reloc_ok; - } - - value = value + addend; - value -= (input_section->output_section->vma - + input_section->output_offset + 8); - value -= offset; - value = value >> howto->rightshift; - - value &= 0xffffff; - value |= (bfd_get_32 (input_bfd, hit_data) & 0xff000000); - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_ARM_ABS32: - value += addend; - if (sym_flags == STT_ARM_TFUNC) - value |= 1; - bfd_put_32 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - case R_ARM_REL32: - value -= (input_section->output_section->vma - + input_section->output_offset); - value += addend; - - 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) */ - 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. */ - value += addend; - - if ((long) value > 0x1f || (long) value < -0x10) - return bfd_reloc_overflow; - - value |= bfd_get_16 (input_bfd, hit_data) & 0xf82f; - bfd_put_16 (input_bfd, value, hit_data); - return bfd_reloc_ok; - - - case R_ARM_THM_PC22: - /* thumb BL (branch long instruction). */ - { - bfd_vma relocation; - boolean overflow = false; - bfd_vma insn = bfd_get_32 (input_bfd, hit_data); - bfd_vma src_mask = 0x007FFFFE; - bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; - bfd_signed_vma reloc_signed_min = ~reloc_signed_max; - bfd_vma check; - bfd_signed_vma signed_check; - bfd_vma add; - bfd_signed_vma signed_add; - - /* If it's not a call to thumb, assume call to arm */ - if (sym_flags != STT_ARM_TFUNC) - { - if (elf32_thumb_to_arm_stub - (info, sym_name, input_bfd, output_bfd, input_section, - hit_data, sym_sec, offset, addend, value)) - return bfd_reloc_ok; - else - return bfd_reloc_dangerous; - } - - relocation = value + addend; - relocation -= (input_section->output_section->vma + input_section->output_offset); - relocation -= offset; - - 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 & ~((bfd_vma) - 1 >> howto->rightshift))); - - /* Get the value from the object file. */ - if (bfd_big_endian (input_bfd)) - add = (((insn) & 0x07ff0000) >> 4) | (((insn) & 0x7ff) << 1); - else - add = ((((insn) & 0x7ff) << 12) | (((insn) & 0x07ff0000) >> 15)); - - /* Get the value from the object file with an appropriate sign. - The expression involving howto->src_mask isolates the upper - bit of src_mask. If that bit is set in the value we are - adding, it is negative, and we subtract out that number times - two. If src_mask includes the highest possible bit, then we - can not get the upper bit, but that does not matter since - signed_add needs no adjustment to become negative in that case. */ - - signed_add = add; - - if ((add & (((~src_mask) >> 1) & src_mask)) != 0) - signed_add -= (((~src_mask) >> 1) & src_mask) << 1; - - /* Add the value from the object file, shifted so that it is a - straight number. */ - /* howto->bitpos == 0 */ - - signed_check += signed_add; - relocation += signed_add; - - /* Assumes two's complement. */ - if (signed_check > reloc_signed_max - || signed_check < reloc_signed_min) - overflow = true; - - /* Put RELOCATION into the correct bits: */ - - if (bfd_big_endian (input_bfd)) - relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000)); - else - relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff)); - - /* Add RELOCATION to the correct bits of X: */ - insn = ((insn & ~howto->dst_mask) | relocation); - - /* Put the relocated value back in the object file: */ - bfd_put_32 (input_bfd, insn, hit_data); - - return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); - } - break; - - case R_ARM_GNU_VTINHERIT: - case R_ARM_GNU_VTENTRY: - return bfd_reloc_ok; - - 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; - } -} - - -/* Relocate an ARM ELF section. */ -static 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, *relend; - const char *name; - - 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; - - 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; - - howto = elf32_arm_howto_table + r_type; - - if (info->relocateable) - { - /* This is a relocateable 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]; - rel->r_addend += sec->output_offset + sym->st_value; - } - } - - continue; - } - - /* 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]; - relocation = (sec->output_section->vma - + sec->output_offset - + sym->st_value); - } - else - { - h = sym_hashes[r_symndx - symtab_hdr->sh_info]; - while (h->root.type == bfd_link_hash_indirect - || h->root.type == bfd_link_hash_warning) - h = (struct elf_link_hash_entry *) h->root.u.i.link; - if (h->root.type == bfd_link_hash_defined - || h->root.type == bfd_link_hash_defweak) - { - sec = h->root.u.def.section; - relocation = (h->root.u.def.value - + sec->output_section->vma - + sec->output_offset); - } - else if (h->root.type == bfd_link_hash_undefweak) - relocation = 0; - else - { - if (!((*info->callbacks->undefined_symbol) - (info, h->root.root.string, input_bfd, - input_section, rel->r_offset))) - return false; - relocation = 0; - } - } - - 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->r_offset, - relocation, rel->r_addend, - info, sec, name, - (h ? ELF_ST_TYPE (h->type) : - ELF_ST_TYPE (sym->st_info))); - - if (r != bfd_reloc_ok) - { - const char * msg = (const char *) 0; - - switch (r) - { - case bfd_reloc_overflow: - if (!((*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))) - 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; -} - -/* Function to keep ARM specific flags in the ELF header. */ -static boolean -elf32_arm_set_private_flags (abfd, flags) - bfd *abfd; - flagword flags; -{ - if (elf_flags_init (abfd) - && elf_elfheader (abfd)->e_flags != flags) - { - if (flags & EF_INTERWORK) - _bfd_error_handler (_ ("\ -Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"), - bfd_get_filename (abfd)); - else - _bfd_error_handler (_ ("\ -Warning: Clearing the interwork flag of %s due to outside request"), - bfd_get_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 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) && in_flags != out_flags) - { - /* Cannot mix PIC and non-PIC code. */ - if ((in_flags & EF_PIC) != (out_flags & EF_PIC)) - return false; - - /* Cannot mix APCS26 and APCS32 code. */ - if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26)) - return false; - - /* Cannot mix float APCS and non-float APCS code. */ - if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT)) - return false; - - /* If the src and dest have different interworking flags - then turn off the interworking bit. */ - if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK)) - { - if (out_flags & EF_INTERWORK) - _bfd_error_handler (_ ("\ -Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"), - bfd_get_filename (obfd), bfd_get_filename (ibfd)); - - in_flags &= ~EF_INTERWORK; - } - } - - 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 boolean -elf32_arm_merge_private_bfd_data (ibfd, obfd) - bfd *ibfd; - bfd *obfd; -{ - flagword out_flags; - flagword in_flags; - - 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 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 - unitialised values, which surprise surprise, correspond - to the default values. */ - if (bfd_get_arch_info (ibfd)->the_default) - 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; - } - - /* Check flag compatibility. */ - if (in_flags == out_flags) - return true; - - /* Complain about various flag mismatches. */ - - if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26)) - _bfd_error_handler (_ ("\ -Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"), - bfd_get_filename (ibfd), - in_flags & EF_APCS_26 ? 26 : 32, - bfd_get_filename (obfd), - out_flags & EF_APCS_26 ? 26 : 32); - - if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT)) - _bfd_error_handler (_ ("\ -Error: %s passes floats in %s registers, whereas %s passes them in %s registers"), - bfd_get_filename (ibfd), - in_flags & EF_APCS_FLOAT ? _ ("float") : _ ("integer"), - bfd_get_filename (obfd), - out_flags & EF_APCS_26 ? _ ("float") : _ ("integer")); - - if ((in_flags & EF_PIC) != (out_flags & EF_PIC)) - _bfd_error_handler (_ ("\ -Error: %s is compiled as position %s code, whereas %s is not"), - bfd_get_filename (ibfd), - in_flags & EF_PIC ? _ ("independent") : _ ("dependent"), - bfd_get_filename (obfd)); - - /* Interworking mismatch is only a warning. */ - if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK)) - { - _bfd_error_handler (_ ("\ -Warning: %s %s interworking, whereas %s %s"), - bfd_get_filename (ibfd), - in_flags & EF_INTERWORK ? _ ("supports") : _ ("does not support"), - bfd_get_filename (obfd), - out_flags & EF_INTERWORK ? _ ("does not") : _ ("does")); - return true; - } - - return false; -} - -/* Display the flags field */ -static boolean -elf32_arm_print_private_bfd_data (abfd, ptr) - bfd *abfd; - PTR ptr; -{ - FILE *file = (FILE *) ptr; - - BFD_ASSERT (abfd != NULL && ptr != NULL); - - /* Print normal ELF private data. */ - _bfd_elf_print_private_bfd_data (abfd, ptr); - - /* 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); - - if (elf_elfheader (abfd)->e_flags & EF_INTERWORK) - fprintf (file, _ (" [interworking enabled]")); - else - fprintf (file, _ (" [interworking not enabled]")); - - if (elf_elfheader (abfd)->e_flags & EF_APCS_26) - fprintf (file, _ (" [APCS-26]")); - else - fprintf (file, _ (" [APCS-32]")); - - if (elf_elfheader (abfd)->e_flags & EF_APCS_FLOAT) - fprintf (file, _ (" [floats passed in float registers]")); - else - fprintf (file, _ (" [floats passed in integer registers]")); - - if (elf_elfheader (abfd)->e_flags & EF_PIC) - fprintf (file, _ (" [position independent]")); - else - fprintf (file, _ (" [absolute position]")); - - fputc ('\n', file); - - return true; -} - -static int -elf32_arm_get_symbol_type (elf_sym, type) - Elf_Internal_Sym * elf_sym; - int type; -{ - if (ELF_ST_TYPE (elf_sym->st_info) == STT_ARM_TFUNC) - return ELF_ST_TYPE (elf_sym->st_info); - else - return type; -} - -static asection * -elf32_arm_gc_mark_hook (abfd, info, rel, h, sym) - bfd *abfd; - struct bfd_link_info *info; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; -{ - if (h != NULL) - { - switch (ELF32_R_TYPE (rel->r_info)) - { - case R_ARM_GNU_VTINHERIT: - case R_ARM_GNU_VTENTRY: - break; - - default: - printf("h is %s\n", h->root.root.string); - 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; - } - } - } - else - { - if (!(elf_bad_symtab (abfd) - && ELF_ST_BIND (sym->st_info) != STB_LOCAL) - && ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE) - && sym->st_shndx != SHN_COMMON)) - { - return bfd_section_from_elf_index (abfd, sym->st_shndx); - } - } - return NULL; -} - -static boolean -elf32_arm_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; -{ - /* we don't use got and plt entries for armelf */ - return true; -} - -/* Look through the relocs for a section during the first phase. - Since we don't do .gots or .plts, we just need to consider the - virtual table relocs for gc. */ - -static 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, **sym_hashes_end; - const Elf_Internal_Rela *rel; - const Elf_Internal_Rela *rel_end; - - if (info->relocateable) - return true; - - symtab_hdr = &elf_tdata (abfd)->symtab_hdr; - sym_hashes = elf_sym_hashes (abfd); - sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym); - if (!elf_bad_symtab (abfd)) - sym_hashes_end -= symtab_hdr->sh_info; - - 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)) - { - /* 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_addend)) - 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. */ - -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; -{ - 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)) - 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; -} - - -#define TARGET_LITTLE_SYM bfd_elf32_littlearm_vec -#define TARGET_LITTLE_NAME "elf32-littlearm" -#define TARGET_BIG_SYM bfd_elf32_bigarm_vec -#define TARGET_BIG_NAME "elf32-bigarm" -#define ELF_ARCH bfd_arch_arm -#define ELF_MACHINE_CODE EM_ARM - -#define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup -#define elf_info_to_howto elf32_arm_info_to_howto -#define elf_info_to_howto_rel 0 -#define elf_backend_relocate_section elf32_arm_relocate_section -#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_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_can_gc_sections 1 -#define elf_symbol_leading_char '_' - -#include "elf32-target.h" |