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authorCatherine Moore <clm@redhat.com>1999-02-01 20:21:00 +0000
committerCatherine Moore <clm@redhat.com>1999-02-01 20:21:00 +0000
commit95c5070c6ef2dafd9ea6026ce08862326bd08a24 (patch)
tree9ec678365341ab82fad7257752059e6ea933059e /bfd/elf32-arm.c
parenta89837187f13944a84067980aed62d5c8e88d555 (diff)
downloadgdb-95c5070c6ef2dafd9ea6026ce08862326bd08a24.zip
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* Makefile.am (elf32-arm-oldabi.lo): New.
(elf32-arm-newabi.lo): New. * Makefile.in: Regenerate. * config.bfd (thumb-*-elf): Remove definition of targ_underscore. (arm-*-elf): Likewise. (arm-*-oabi): New. (thumb-*-oabi): New. * configure: Regenerate. * configure.in (bfd_elf32_littlearm_oabi_vec): New. (bfd_elf32_bigarm_oabi_vec): New. * elf32-arm-newabi.c: New. * elf32-arm-oldabi.c: New. * elf32-arm.c: Removed. * elf32-arm.h: New.
Diffstat (limited to 'bfd/elf32-arm.c')
-rw-r--r--bfd/elf32-arm.c2049
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"