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- /* BFD back-end for ARM COFF files.
- Copyright (C) 1990-2022 Free Software Foundation, Inc.
- Written by Cygnus Support.
- 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
- MA 02110-1301, USA. */
- #include "sysdep.h"
- #include "bfd.h"
- #include "libbfd.h"
- #include "coff/arm.h"
- #include "coff/internal.h"
- #include "cpu-arm.h"
- #include "coff-arm.h"
- #ifdef COFF_WITH_PE
- #include "coff/pe.h"
- #endif
- #include "libcoff.h"
- /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
- #define OCTETS_PER_BYTE(ABFD, SEC) 1
- /* Macros for manipulation the bits in the flags field of the coff data
- structure. */
- #define APCS_26_FLAG(abfd) \
- (coff_data (abfd)->flags & F_APCS_26)
- #define APCS_FLOAT_FLAG(abfd) \
- (coff_data (abfd)->flags & F_APCS_FLOAT)
- #define PIC_FLAG(abfd) \
- (coff_data (abfd)->flags & F_PIC)
- #define APCS_SET(abfd) \
- (coff_data (abfd)->flags & F_APCS_SET)
- #define SET_APCS_FLAGS(abfd, flgs) \
- do \
- { \
- coff_data (abfd)->flags &= ~(F_APCS_26 | F_APCS_FLOAT | F_PIC); \
- coff_data (abfd)->flags |= (flgs) | F_APCS_SET; \
- } \
- while (0)
- #define INTERWORK_FLAG(abfd) \
- (coff_data (abfd)->flags & F_INTERWORK)
- #define INTERWORK_SET(abfd) \
- (coff_data (abfd)->flags & F_INTERWORK_SET)
- #define SET_INTERWORK_FLAG(abfd, flg) \
- do \
- { \
- coff_data (abfd)->flags &= ~F_INTERWORK; \
- coff_data (abfd)->flags |= (flg) | F_INTERWORK_SET; \
- } \
- while (0)
- #ifndef NUM_ELEM
- #define NUM_ELEM(a) ((sizeof (a)) / sizeof ((a)[0]))
- #endif
- typedef enum {bunknown, b9, b12, b23} thumb_pcrel_branchtype;
- /* Some typedefs for holding instructions. */
- typedef unsigned long int insn32;
- typedef unsigned short int insn16;
- /* The linker script knows the section names for placement.
- The entry_names are used to do simple name mangling on the stubs.
- Given a function name, and its type, the stub can be found. The
- name can be changed. The only requirement is the %s be present. */
- #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t"
- #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb"
- #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7"
- #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm"
- /* Used by the assembler. */
- static bfd_reloc_status_type
- coff_arm_reloc (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol ATTRIBUTE_UNUSED,
- void * data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message ATTRIBUTE_UNUSED)
- {
- symvalue diff;
- if (output_bfd == NULL)
- return bfd_reloc_continue;
- diff = reloc_entry->addend;
- #define DOIT(x) \
- x = ((x & ~howto->dst_mask) \
- | (((x & howto->src_mask) + diff) & howto->dst_mask))
- if (diff != 0)
- {
- reloc_howto_type *howto = reloc_entry->howto;
- bfd_size_type octets = (reloc_entry->address
- * OCTETS_PER_BYTE (abfd, input_section));
- unsigned char *addr = (unsigned char *) data + octets;
- if (!bfd_reloc_offset_in_range (howto, abfd, input_section, octets))
- return bfd_reloc_outofrange;
- switch (howto->size)
- {
- case 0:
- {
- char x = bfd_get_8 (abfd, addr);
- DOIT (x);
- bfd_put_8 (abfd, x, addr);
- }
- break;
- case 1:
- {
- short x = bfd_get_16 (abfd, addr);
- DOIT (x);
- bfd_put_16 (abfd, (bfd_vma) x, addr);
- }
- break;
- case 2:
- {
- long x = bfd_get_32 (abfd, addr);
- DOIT (x);
- bfd_put_32 (abfd, (bfd_vma) x, addr);
- }
- break;
- default:
- abort ();
- }
- }
- /* Now let bfd_perform_relocation finish everything up. */
- return bfd_reloc_continue;
- }
- /* If USER_LABEL_PREFIX is defined as "_" (see coff_arm_is_local_label_name()
- in this file), then TARGET_UNDERSCORE should be defined, otherwise it
- should not. */
- #ifndef TARGET_UNDERSCORE
- #define TARGET_UNDERSCORE '_'
- #endif
- #ifndef PCRELOFFSET
- #define PCRELOFFSET true
- #endif
- /* These most certainly belong somewhere else. Just had to get rid of
- the manifest constants in the code. */
- #ifdef ARM_WINCE
- #define ARM_26D 0
- #define ARM_32 1
- #define ARM_RVA32 2
- #define ARM_26 3
- #define ARM_THUMB12 4
- #define ARM_SECTION 14
- #define ARM_SECREL 15
- #else
- #define ARM_8 0
- #define ARM_16 1
- #define ARM_32 2
- #define ARM_26 3
- #define ARM_DISP8 4
- #define ARM_DISP16 5
- #define ARM_DISP32 6
- #define ARM_26D 7
- /* 8 is unused. */
- #define ARM_NEG16 9
- #define ARM_NEG32 10
- #define ARM_RVA32 11
- #define ARM_THUMB9 12
- #define ARM_THUMB12 13
- #define ARM_THUMB23 14
- #endif
- static bfd_reloc_status_type aoutarm_fix_pcrel_26_done
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type aoutarm_fix_pcrel_26
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type coff_thumb_pcrel_12
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- #ifndef ARM_WINCE
- static bfd_reloc_status_type coff_thumb_pcrel_9
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- static bfd_reloc_status_type coff_thumb_pcrel_23
- (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
- #endif
- static reloc_howto_type aoutarm_std_reloc_howto[] =
- {
- #ifdef ARM_WINCE
- HOWTO (ARM_26D,
- 2,
- 2,
- 24,
- true,
- 0,
- complain_overflow_dont,
- aoutarm_fix_pcrel_26_done,
- "ARM_26D",
- true, /* partial_inplace. */
- 0x00ffffff,
- 0x0,
- PCRELOFFSET),
- HOWTO (ARM_32,
- 0,
- 2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_32",
- true, /* partial_inplace. */
- 0xffffffff,
- 0xffffffff,
- PCRELOFFSET),
- HOWTO (ARM_RVA32,
- 0,
- 2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_RVA32",
- true, /* partial_inplace. */
- 0xffffffff,
- 0xffffffff,
- PCRELOFFSET),
- HOWTO (ARM_26,
- 2,
- 2,
- 24,
- true,
- 0,
- complain_overflow_signed,
- aoutarm_fix_pcrel_26 ,
- "ARM_26",
- false,
- 0x00ffffff,
- 0x00ffffff,
- PCRELOFFSET),
- HOWTO (ARM_THUMB12,
- 1,
- 1,
- 11,
- true,
- 0,
- complain_overflow_signed,
- coff_thumb_pcrel_12 ,
- "ARM_THUMB12",
- false,
- 0x000007ff,
- 0x000007ff,
- PCRELOFFSET),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- EMPTY_HOWTO (-1),
- HOWTO (ARM_SECTION,
- 0,
- 1,
- 16,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_SECTION",
- true, /* partial_inplace. */
- 0x0000ffff,
- 0x0000ffff,
- PCRELOFFSET),
- HOWTO (ARM_SECREL,
- 0,
- 2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_SECREL",
- true, /* partial_inplace. */
- 0xffffffff,
- 0xffffffff,
- PCRELOFFSET),
- #else /* not ARM_WINCE */
- HOWTO (ARM_8,
- 0,
- 0,
- 8,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_8",
- true,
- 0x000000ff,
- 0x000000ff,
- PCRELOFFSET),
- HOWTO (ARM_16,
- 0,
- 1,
- 16,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_16",
- true,
- 0x0000ffff,
- 0x0000ffff,
- PCRELOFFSET),
- HOWTO (ARM_32,
- 0,
- 2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_32",
- true,
- 0xffffffff,
- 0xffffffff,
- PCRELOFFSET),
- HOWTO (ARM_26,
- 2,
- 2,
- 24,
- true,
- 0,
- complain_overflow_signed,
- aoutarm_fix_pcrel_26 ,
- "ARM_26",
- false,
- 0x00ffffff,
- 0x00ffffff,
- PCRELOFFSET),
- HOWTO (ARM_DISP8,
- 0,
- 0,
- 8,
- true,
- 0,
- complain_overflow_signed,
- coff_arm_reloc,
- "ARM_DISP8",
- true,
- 0x000000ff,
- 0x000000ff,
- true),
- HOWTO (ARM_DISP16,
- 0,
- 1,
- 16,
- true,
- 0,
- complain_overflow_signed,
- coff_arm_reloc,
- "ARM_DISP16",
- true,
- 0x0000ffff,
- 0x0000ffff,
- true),
- HOWTO (ARM_DISP32,
- 0,
- 2,
- 32,
- true,
- 0,
- complain_overflow_signed,
- coff_arm_reloc,
- "ARM_DISP32",
- true,
- 0xffffffff,
- 0xffffffff,
- true),
- HOWTO (ARM_26D,
- 2,
- 2,
- 24,
- false,
- 0,
- complain_overflow_dont,
- aoutarm_fix_pcrel_26_done,
- "ARM_26D",
- true,
- 0x00ffffff,
- 0x0,
- false),
- /* 8 is unused */
- EMPTY_HOWTO (-1),
- HOWTO (ARM_NEG16,
- 0,
- -1,
- 16,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_NEG16",
- true,
- 0x0000ffff,
- 0x0000ffff,
- false),
- HOWTO (ARM_NEG32,
- 0,
- -2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_NEG32",
- true,
- 0xffffffff,
- 0xffffffff,
- false),
- HOWTO (ARM_RVA32,
- 0,
- 2,
- 32,
- false,
- 0,
- complain_overflow_bitfield,
- coff_arm_reloc,
- "ARM_RVA32",
- true,
- 0xffffffff,
- 0xffffffff,
- PCRELOFFSET),
- HOWTO (ARM_THUMB9,
- 1,
- 1,
- 8,
- true,
- 0,
- complain_overflow_signed,
- coff_thumb_pcrel_9 ,
- "ARM_THUMB9",
- false,
- 0x000000ff,
- 0x000000ff,
- PCRELOFFSET),
- HOWTO (ARM_THUMB12,
- 1,
- 1,
- 11,
- true,
- 0,
- complain_overflow_signed,
- coff_thumb_pcrel_12 ,
- "ARM_THUMB12",
- false,
- 0x000007ff,
- 0x000007ff,
- PCRELOFFSET),
- HOWTO (ARM_THUMB23,
- 1,
- 2,
- 22,
- true,
- 0,
- complain_overflow_signed,
- coff_thumb_pcrel_23 ,
- "ARM_THUMB23",
- false,
- 0x07ff07ff,
- 0x07ff07ff,
- PCRELOFFSET)
- #endif /* not ARM_WINCE */
- };
- #define NUM_RELOCS NUM_ELEM (aoutarm_std_reloc_howto)
- #ifdef COFF_WITH_PE
- /* Return TRUE if this relocation should
- appear in the output .reloc section. */
- static bool
- in_reloc_p (bfd * abfd ATTRIBUTE_UNUSED,
- reloc_howto_type * howto)
- {
- return !howto->pc_relative && howto->type != ARM_RVA32;
- }
- #endif
- #define RTYPE2HOWTO(cache_ptr, dst) \
- (cache_ptr)->howto = \
- (dst)->r_type < NUM_RELOCS \
- ? aoutarm_std_reloc_howto + (dst)->r_type \
- : NULL
- #define coff_rtype_to_howto coff_arm_rtype_to_howto
- static reloc_howto_type *
- coff_arm_rtype_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
- asection *sec,
- struct internal_reloc *rel,
- struct coff_link_hash_entry *h ATTRIBUTE_UNUSED,
- struct internal_syment *sym ATTRIBUTE_UNUSED,
- bfd_vma *addendp)
- {
- reloc_howto_type * howto;
- if (rel->r_type >= NUM_RELOCS)
- return NULL;
- howto = aoutarm_std_reloc_howto + rel->r_type;
- if (rel->r_type == ARM_RVA32)
- *addendp -= pe_data (sec->output_section->owner)->pe_opthdr.ImageBase;
- #if defined COFF_WITH_PE && defined ARM_WINCE
- if (rel->r_type == ARM_SECREL)
- {
- bfd_vma osect_vma;
- if (h && (h->type == bfd_link_hash_defined
- || h->type == bfd_link_hash_defweak))
- osect_vma = h->root.u.def.section->output_section->vma;
- else
- {
- int i;
- /* Sigh, the only way to get the section to offset against
- is to find it the hard way. */
- for (sec = abfd->sections, i = 1; i < sym->n_scnum; i++)
- sec = sec->next;
- osect_vma = sec->output_section->vma;
- }
- *addendp -= osect_vma;
- }
- #endif
- return howto;
- }
- /* Used by the assembler. */
- static bfd_reloc_status_type
- aoutarm_fix_pcrel_26_done (bfd *abfd ATTRIBUTE_UNUSED,
- arelent *reloc_entry ATTRIBUTE_UNUSED,
- asymbol *symbol ATTRIBUTE_UNUSED,
- void * data ATTRIBUTE_UNUSED,
- asection *input_section ATTRIBUTE_UNUSED,
- bfd *output_bfd ATTRIBUTE_UNUSED,
- char **error_message ATTRIBUTE_UNUSED)
- {
- /* This is dead simple at present. */
- return bfd_reloc_ok;
- }
- /* Used by the assembler. */
- static bfd_reloc_status_type
- aoutarm_fix_pcrel_26 (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void * data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message ATTRIBUTE_UNUSED)
- {
- bfd_vma relocation;
- bfd_size_type addr = reloc_entry->address;
- long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
- bfd_reloc_status_type flag = bfd_reloc_ok;
- /* If this is an undefined symbol, return error. */
- if (bfd_is_und_section (symbol->section)
- && (symbol->flags & BSF_WEAK) == 0)
- return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
- /* If the sections are different, and we are doing a partial relocation,
- just ignore it for now. */
- if (symbol->section->name != input_section->name
- && output_bfd != (bfd *)NULL)
- return bfd_reloc_continue;
- relocation = (target & 0x00ffffff) << 2;
- relocation = (relocation ^ 0x02000000) - 0x02000000; /* Sign extend. */
- relocation += symbol->value;
- relocation += symbol->section->output_section->vma;
- relocation += symbol->section->output_offset;
- relocation += reloc_entry->addend;
- relocation -= input_section->output_section->vma;
- relocation -= input_section->output_offset;
- relocation -= addr;
- if (relocation & 3)
- return bfd_reloc_overflow;
- /* Check for overflow. */
- if (relocation & 0x02000000)
- {
- if ((relocation & ~ (bfd_vma) 0x03ffffff) != ~ (bfd_vma) 0x03ffffff)
- flag = bfd_reloc_overflow;
- }
- else if (relocation & ~(bfd_vma) 0x03ffffff)
- flag = bfd_reloc_overflow;
- target &= ~0x00ffffff;
- target |= (relocation >> 2) & 0x00ffffff;
- bfd_put_32 (abfd, (bfd_vma) target, (bfd_byte *) data + addr);
- /* Now the ARM magic... Change the reloc type so that it is marked as done.
- Strictly this is only necessary if we are doing a partial relocation. */
- reloc_entry->howto = &aoutarm_std_reloc_howto[ARM_26D];
- return flag;
- }
- static bfd_reloc_status_type
- coff_thumb_pcrel_common (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void * data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message ATTRIBUTE_UNUSED,
- thumb_pcrel_branchtype btype)
- {
- bfd_vma relocation = 0;
- bfd_size_type addr = reloc_entry->address;
- long target = bfd_get_32 (abfd, (bfd_byte *) data + addr);
- bfd_reloc_status_type flag = bfd_reloc_ok;
- bfd_vma dstmsk;
- bfd_vma offmsk;
- bfd_vma signbit;
- /* NOTE: This routine is currently used by GAS, but not by the link
- phase. */
- switch (btype)
- {
- case b9:
- dstmsk = 0x000000ff;
- offmsk = 0x000001fe;
- signbit = 0x00000100;
- break;
- case b12:
- dstmsk = 0x000007ff;
- offmsk = 0x00000ffe;
- signbit = 0x00000800;
- break;
- case b23:
- dstmsk = 0x07ff07ff;
- offmsk = 0x007fffff;
- signbit = 0x00400000;
- break;
- default:
- abort ();
- }
- /* If this is an undefined symbol, return error. */
- if (bfd_is_und_section (symbol->section)
- && (symbol->flags & BSF_WEAK) == 0)
- return output_bfd ? bfd_reloc_continue : bfd_reloc_undefined;
- /* If the sections are different, and we are doing a partial relocation,
- just ignore it for now. */
- if (symbol->section->name != input_section->name
- && output_bfd != (bfd *)NULL)
- return bfd_reloc_continue;
- switch (btype)
- {
- case b9:
- case b12:
- relocation = ((target & dstmsk) << 1);
- break;
- case b23:
- if (bfd_big_endian (abfd))
- relocation = ((target & 0x7ff) << 1) | ((target & 0x07ff0000) >> 4);
- else
- relocation = ((target & 0x7ff) << 12) | ((target & 0x07ff0000) >> 15);
- break;
- default:
- abort ();
- }
- relocation = (relocation ^ signbit) - signbit; /* Sign extend. */
- relocation += symbol->value;
- relocation += symbol->section->output_section->vma;
- relocation += symbol->section->output_offset;
- relocation += reloc_entry->addend;
- relocation -= input_section->output_section->vma;
- relocation -= input_section->output_offset;
- relocation -= addr;
- if (relocation & 1)
- return bfd_reloc_overflow;
- /* Check for overflow. */
- if (relocation & signbit)
- {
- if ((relocation & ~offmsk) != ~offmsk)
- flag = bfd_reloc_overflow;
- }
- else if (relocation & ~offmsk)
- flag = bfd_reloc_overflow;
- target &= ~dstmsk;
- switch (btype)
- {
- case b9:
- case b12:
- target |= (relocation >> 1);
- break;
- case b23:
- if (bfd_big_endian (abfd))
- target |= (((relocation & 0xfff) >> 1)
- | ((relocation << 4) & 0x07ff0000));
- else
- target |= (((relocation & 0xffe) << 15)
- | ((relocation >> 12) & 0x7ff));
- break;
- default:
- abort ();
- }
- bfd_put_32 (abfd, (bfd_vma) target, (bfd_byte *) data + addr);
- /* Now the ARM magic... Change the reloc type so that it is marked as done.
- Strictly this is only necessary if we are doing a partial relocation. */
- reloc_entry->howto = & aoutarm_std_reloc_howto [ARM_26D];
- /* TODO: We should possibly have DONE entries for the THUMB PCREL relocations. */
- return flag;
- }
- #ifndef ARM_WINCE
- static bfd_reloc_status_type
- coff_thumb_pcrel_23 (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void * data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message)
- {
- return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message,
- b23);
- }
- static bfd_reloc_status_type
- coff_thumb_pcrel_9 (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void * data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message)
- {
- return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message,
- b9);
- }
- #endif /* not ARM_WINCE */
- static bfd_reloc_status_type
- coff_thumb_pcrel_12 (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void * data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message)
- {
- return coff_thumb_pcrel_common (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message,
- b12);
- }
- static reloc_howto_type *
- coff_arm_reloc_type_lookup (bfd * abfd, bfd_reloc_code_real_type code)
- {
- #define ASTD(i,j) case i: return aoutarm_std_reloc_howto + j
- if (code == BFD_RELOC_CTOR)
- switch (bfd_arch_bits_per_address (abfd))
- {
- case 32:
- code = BFD_RELOC_32;
- break;
- default:
- return NULL;
- }
- switch (code)
- {
- #ifdef ARM_WINCE
- ASTD (BFD_RELOC_32, ARM_32);
- ASTD (BFD_RELOC_RVA, ARM_RVA32);
- ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26);
- ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12);
- ASTD (BFD_RELOC_32_SECREL, ARM_SECREL);
- #else
- ASTD (BFD_RELOC_8, ARM_8);
- ASTD (BFD_RELOC_16, ARM_16);
- ASTD (BFD_RELOC_32, ARM_32);
- ASTD (BFD_RELOC_ARM_PCREL_BRANCH, ARM_26);
- ASTD (BFD_RELOC_ARM_PCREL_BLX, ARM_26);
- ASTD (BFD_RELOC_8_PCREL, ARM_DISP8);
- ASTD (BFD_RELOC_16_PCREL, ARM_DISP16);
- ASTD (BFD_RELOC_32_PCREL, ARM_DISP32);
- ASTD (BFD_RELOC_RVA, ARM_RVA32);
- ASTD (BFD_RELOC_THUMB_PCREL_BRANCH9, ARM_THUMB9);
- ASTD (BFD_RELOC_THUMB_PCREL_BRANCH12, ARM_THUMB12);
- ASTD (BFD_RELOC_THUMB_PCREL_BRANCH23, ARM_THUMB23);
- ASTD (BFD_RELOC_THUMB_PCREL_BLX, ARM_THUMB23);
- #endif
- default: return NULL;
- }
- }
- static reloc_howto_type *
- coff_arm_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0;
- i < (sizeof (aoutarm_std_reloc_howto)
- / sizeof (aoutarm_std_reloc_howto[0]));
- i++)
- if (aoutarm_std_reloc_howto[i].name != NULL
- && strcasecmp (aoutarm_std_reloc_howto[i].name, r_name) == 0)
- return &aoutarm_std_reloc_howto[i];
- return NULL;
- }
- #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 2
- #define COFF_PAGE_SIZE 0x1000
- /* Turn a howto into a reloc nunmber. */
- #define SELECT_RELOC(x,howto) { x.r_type = howto->type; }
- #define BADMAG(x) ARMBADMAG(x)
- #define ARM 1 /* Customize coffcode.h. */
- #ifndef ARM_WINCE
- /* Make sure that the 'r_offset' field is copied properly
- so that identical binaries will compare the same. */
- #define SWAP_IN_RELOC_OFFSET H_GET_32
- #define SWAP_OUT_RELOC_OFFSET H_PUT_32
- #endif
- /* Extend the coff_link_hash_table structure with a few ARM specific fields.
- This allows us to store global data here without actually creating any
- global variables, which is a no-no in the BFD world. */
- struct coff_arm_link_hash_table
- {
- /* The original coff_link_hash_table structure. MUST be first field. */
- struct coff_link_hash_table root;
- /* The size in bytes of the section containing the Thumb-to-ARM glue. */
- bfd_size_type thumb_glue_size;
- /* The size in bytes of the section containing the ARM-to-Thumb glue. */
- bfd_size_type arm_glue_size;
- /* An arbitrary input BFD chosen to hold the glue sections. */
- bfd * bfd_of_glue_owner;
- /* Support interworking with old, non-interworking aware ARM code. */
- int support_old_code;
- };
- /* Get the ARM coff linker hash table from a link_info structure. */
- #define coff_arm_hash_table(info) \
- ((struct coff_arm_link_hash_table *) ((info)->hash))
- /* Create an ARM coff linker hash table. */
- static struct bfd_link_hash_table *
- coff_arm_link_hash_table_create (bfd * abfd)
- {
- struct coff_arm_link_hash_table * ret;
- size_t amt = sizeof (struct coff_arm_link_hash_table);
- ret = bfd_zmalloc (amt);
- if (ret == NULL)
- return NULL;
- if (!_bfd_coff_link_hash_table_init (&ret->root,
- abfd,
- _bfd_coff_link_hash_newfunc,
- sizeof (struct coff_link_hash_entry)))
- {
- free (ret);
- return NULL;
- }
- return & ret->root.root;
- }
- static bool
- arm_emit_base_file_entry (struct bfd_link_info *info,
- bfd *output_bfd,
- asection *input_section,
- bfd_vma reloc_offset)
- {
- bfd_vma addr = (reloc_offset
- - input_section->vma
- + input_section->output_offset
- + input_section->output_section->vma);
- if (coff_data (output_bfd)->pe)
- addr -= pe_data (output_bfd)->pe_opthdr.ImageBase;
- if (fwrite (&addr, sizeof (addr), 1, (FILE *) info->base_file) == 1)
- return true;
- bfd_set_error (bfd_error_system_call);
- return false;
- }
- #ifndef ARM_WINCE
- /* The thumb form of a long branch is a bit finicky, because the offset
- encoding is split over two fields, each in it's own instruction. They
- can occur in any order. So given a thumb form of long branch, and an
- offset, insert the offset into the thumb branch and return finished
- instruction.
- It takes two thumb instructions to encode the target address. Each has
- 11 bits to invest. The upper 11 bits are stored in one (identified by
- H-0.. see below), the lower 11 bits are stored in the other (identified
- by H-1).
- Combine together and shifted left by 1 (it's a half word address) and
- there you have it.
- Op: 1111 = F,
- H-0, upper address-0 = 000
- Op: 1111 = F,
- H-1, lower address-0 = 800
- They can be ordered either way, but the arm tools I've seen always put
- the lower one first. It probably doesn't matter. krk@cygnus.com
- XXX: Actually the order does matter. The second instruction (H-1)
- moves the computed address into the PC, so it must be the second one
- in the sequence. The problem, however is that whilst little endian code
- stores the instructions in HI then LOW order, big endian code does the
- reverse. nickc@cygnus.com. */
- #define LOW_HI_ORDER 0xF800F000
- #define HI_LOW_ORDER 0xF000F800
- static insn32
- insert_thumb_branch (insn32 br_insn, int rel_off)
- {
- unsigned int low_bits;
- unsigned int high_bits;
- BFD_ASSERT ((rel_off & 1) != 1);
- rel_off >>= 1; /* Half word aligned address. */
- low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */
- high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */
- if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER)
- br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits;
- else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER)
- br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits;
- else
- /* FIXME: the BFD library should never abort except for internal errors
- - it should return an error status. */
- abort (); /* Error - not a valid branch instruction form. */
- return br_insn;
- }
- static struct coff_link_hash_entry *
- find_thumb_glue (struct bfd_link_info *info,
- const char *name,
- bfd *input_bfd)
- {
- char *tmp_name;
- struct coff_link_hash_entry *myh;
- size_t amt = strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1;
- tmp_name = bfd_malloc (amt);
- BFD_ASSERT (tmp_name);
- sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
- myh = coff_link_hash_lookup
- (coff_hash_table (info), tmp_name, false, false, true);
- if (myh == NULL)
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unable to find THUMB glue '%s' for `%s'"),
- input_bfd, tmp_name, name);
- free (tmp_name);
- return myh;
- }
- #endif /* not ARM_WINCE */
- static struct coff_link_hash_entry *
- find_arm_glue (struct bfd_link_info *info,
- const char *name,
- bfd *input_bfd)
- {
- char *tmp_name;
- struct coff_link_hash_entry * myh;
- size_t amt = strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1;
- tmp_name = bfd_malloc (amt);
- BFD_ASSERT (tmp_name);
- sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
- myh = coff_link_hash_lookup
- (coff_hash_table (info), tmp_name, false, false, true);
- if (myh == NULL)
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unable to find ARM glue '%s' for `%s'"),
- 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 (globals->support_old_code ? 20 : 8)
- #ifndef ARM_WINCE
- 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;
- #endif
- /* TODO:
- We should really create new local (static) symbols in destination
- object for each stub we create. We should also create local
- (static) symbols within the stubs when switching between ARM and
- Thumb code. This will ensure that the debugger and disassembler
- can present a better view of stubs.
- We can treat stubs like literal sections, and for the THUMB9 ones
- (short addressing range) we should be able to insert the stubs
- between sections. i.e. the simplest approach (since relocations
- are done on a section basis) is to dump the stubs at the end of
- processing a section. That way we can always try and minimise the
- offset to and from a stub. However, this does not map well onto
- the way that the linker/BFD does its work: mapping all input
- sections to output sections via the linker script before doing
- all the processing.
- Unfortunately it may be easier to just to disallow short range
- Thumb->ARM stubs (i.e. no conditional inter-working branches,
- only branch-and-link (BL) calls. This will simplify the processing
- since we can then put all of the stubs into their own section.
- TODO:
- On a different subject, rather than complaining when a
- branch cannot fit in the number of bits available for the
- instruction we should generate a trampoline stub (needed to
- address the complete 32bit address space). */
- /* The standard COFF backend linker does not cope with the special
- Thumb BRANCH23 relocation. The alternative would be to split the
- BRANCH23 into separate HI23 and LO23 relocations. However, it is a
- bit simpler simply providing our own relocation driver. */
- /* The reloc processing routine for the ARM/Thumb COFF linker. NOTE:
- This code is a very slightly modified copy of
- _bfd_coff_generic_relocate_section. It would be a much more
- maintainable solution to have a MACRO that could be expanded within
- _bfd_coff_generic_relocate_section that would only be provided for
- ARM/Thumb builds. It is only the code marked THUMBEXTENSION that
- is different from the original. */
- static bool
- coff_arm_relocate_section (bfd *output_bfd,
- struct bfd_link_info *info,
- bfd *input_bfd,
- asection *input_section,
- bfd_byte *contents,
- struct internal_reloc *relocs,
- struct internal_syment *syms,
- asection **sections)
- {
- struct internal_reloc * rel;
- struct internal_reloc * relend;
- #ifndef ARM_WINCE
- bfd_vma high_address = bfd_get_section_limit (input_bfd, input_section);
- #endif
- rel = relocs;
- relend = rel + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- int done = 0;
- long symndx;
- struct coff_link_hash_entry * h;
- struct internal_syment * sym;
- bfd_vma addend;
- bfd_vma val;
- reloc_howto_type * howto;
- bfd_reloc_status_type rstat;
- bfd_vma h_val;
- symndx = rel->r_symndx;
- if (symndx == -1)
- {
- h = NULL;
- sym = NULL;
- }
- else
- {
- h = obj_coff_sym_hashes (input_bfd)[symndx];
- sym = syms + symndx;
- }
- /* COFF treats common symbols in one of two ways. Either the
- size of the symbol is included in the section contents, or it
- is not. We assume that the size is not included, and force
- the rtype_to_howto function to adjust the addend as needed. */
- if (sym != NULL && sym->n_scnum != 0)
- addend = - sym->n_value;
- else
- addend = 0;
- howto = coff_rtype_to_howto (input_bfd, input_section, rel, h,
- sym, &addend);
- if (howto == NULL)
- return false;
- /* The relocation_section function will skip pcrel_offset relocs
- when doing a relocatable link. However, we want to convert
- ARM_26 to ARM_26D relocs if possible. We return a fake howto in
- this case without pcrel_offset set, and adjust the addend to
- compensate. 'partial_inplace' is also set, since we want 'done'
- relocations to be reflected in section's data. */
- if (rel->r_type == ARM_26
- && h != NULL
- && bfd_link_relocatable (info)
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && (h->root.u.def.section->output_section
- == input_section->output_section))
- {
- static reloc_howto_type fake_arm26_reloc =
- HOWTO (ARM_26,
- 2,
- 2,
- 24,
- true,
- 0,
- complain_overflow_signed,
- aoutarm_fix_pcrel_26 ,
- "ARM_26",
- true,
- 0x00ffffff,
- 0x00ffffff,
- false);
- addend -= rel->r_vaddr - input_section->vma;
- #ifdef ARM_WINCE
- /* FIXME: I don't know why, but the hack is necessary for correct
- generation of bl's instruction offset. */
- addend -= 8;
- #endif
- howto = & fake_arm26_reloc;
- }
- #ifdef ARM_WINCE
- /* MS ARM-CE makes the reloc relative to the opcode's pc, not
- the next opcode's pc, so is off by one. */
- if (howto->pc_relative && !bfd_link_relocatable (info))
- addend -= 8;
- #endif
- /* If we are doing a relocatable link, then we can just ignore
- a PC relative reloc that is pcrel_offset. It will already
- have the correct value. If this is not a relocatable link,
- then we should ignore the symbol value. */
- if (howto->pc_relative && howto->pcrel_offset)
- {
- if (bfd_link_relocatable (info))
- continue;
- /* FIXME - it is not clear which targets need this next test
- and which do not. It is known that it is needed for the
- VxWorks targets but it is also known that it was suppressed
- for other ARM targets. This ought to be sorted out one day. */
- #ifdef ARM_COFF_BUGFIX
- /* We must not ignore the symbol value. If the symbol is
- within the same section, the relocation should have already
- been fixed, but if it is not, we'll be handed a reloc into
- the beginning of the symbol's section, so we must not cancel
- out the symbol's value, otherwise we'll be adding it in
- twice. */
- if (sym != NULL && sym->n_scnum != 0)
- addend += sym->n_value;
- #endif
- }
- val = 0;
- if (h == NULL)
- {
- asection *sec;
- if (symndx == -1)
- {
- sec = bfd_abs_section_ptr;
- val = 0;
- }
- else
- {
- sec = sections[symndx];
- val = (sec->output_section->vma
- + sec->output_offset
- + sym->n_value
- - sec->vma);
- }
- }
- else
- {
- /* We don't output the stubs if we are generating a
- relocatable output file, since we may as well leave the
- stub generation to the final linker pass. If we fail to
- verify that the name is defined, we'll try to build stubs
- for an undefined name... */
- if (! bfd_link_relocatable (info)
- && ( h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- asection * h_sec = h->root.u.def.section;
- const char * name = h->root.root.string;
- /* h locates the symbol referenced in the reloc. */
- h_val = (h->root.u.def.value
- + h_sec->output_section->vma
- + h_sec->output_offset);
- if (howto->type == ARM_26)
- {
- if ( h->symbol_class == C_THUMBSTATFUNC
- || h->symbol_class == C_THUMBEXTFUNC)
- {
- /* Arm code calling a Thumb function. */
- unsigned long int tmp;
- bfd_vma my_offset;
- asection * s;
- long int ret_offset;
- struct coff_link_hash_entry * myh;
- struct coff_arm_link_hash_table * globals;
- myh = find_arm_glue (info, name, input_bfd);
- if (myh == NULL)
- return false;
- globals = coff_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 (h_sec->owner != NULL
- && INTERWORK_SET (h_sec->owner)
- && ! INTERWORK_FLAG (h_sec->owner))
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB(%s): warning: interworking not enabled; "
- "first occurrence: %pB: arm call to thumb"),
- h_sec->owner, name, input_bfd);
- --my_offset;
- myh->root.u.def.value = my_offset;
- bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn,
- s->contents + my_offset);
- bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn,
- s->contents + my_offset + 4);
- /* It's a thumb address. Add the low order bit. */
- bfd_put_32 (output_bfd, h_val | a2t3_func_addr_insn,
- s->contents + my_offset + 8);
- if (info->base_file
- && !arm_emit_base_file_entry (info, output_bfd,
- s, my_offset + 8))
- return false;
- }
- BFD_ASSERT (my_offset <= globals->arm_glue_size);
- tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr
- - input_section->vma);
- 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
- + rel->r_vaddr)
- - 8;
- tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF);
- bfd_put_32 (output_bfd, (bfd_vma) tmp,
- contents + rel->r_vaddr - input_section->vma);
- done = 1;
- }
- }
- #ifndef ARM_WINCE
- /* Note: We used to check for ARM_THUMB9 and ARM_THUMB12. */
- else if (howto->type == ARM_THUMB23)
- {
- if ( h->symbol_class == C_EXT
- || h->symbol_class == C_STAT
- || h->symbol_class == C_LABEL)
- {
- /* Thumb code calling an ARM function. */
- asection * s = 0;
- bfd_vma my_offset;
- unsigned long int tmp;
- long int ret_offset;
- struct coff_link_hash_entry * myh;
- struct coff_arm_link_hash_table * globals;
- myh = find_thumb_glue (info, name, input_bfd);
- if (myh == NULL)
- return false;
- globals = coff_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 (h_sec->owner != NULL
- && INTERWORK_SET (h_sec->owner)
- && ! INTERWORK_FLAG (h_sec->owner)
- && ! globals->support_old_code)
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB(%s): warning: interworking not enabled; "
- "first occurrence: %pB: thumb call to arm; "
- "consider relinking with --support-old-code "
- "enabled"),
- h_sec->owner, name, input_bfd);
- -- my_offset;
- myh->root.u.def.value = my_offset;
- if (globals->support_old_code)
- {
- bfd_put_16 (output_bfd, (bfd_vma) t2a1_push_insn,
- s->contents + my_offset);
- bfd_put_16 (output_bfd, (bfd_vma) t2a2_ldr_insn,
- s->contents + my_offset + 2);
- bfd_put_16 (output_bfd, (bfd_vma) t2a3_mov_insn,
- s->contents + my_offset + 4);
- bfd_put_16 (output_bfd, (bfd_vma) t2a4_bx_insn,
- s->contents + my_offset + 6);
- bfd_put_32 (output_bfd, (bfd_vma) t2a5_pop_insn,
- s->contents + my_offset + 8);
- bfd_put_32 (output_bfd, (bfd_vma) t2a6_bx_insn,
- s->contents + my_offset + 12);
- /* Store the address of the function in the last word of the stub. */
- bfd_put_32 (output_bfd, h_val,
- s->contents + my_offset + 16);
- if (info->base_file
- && !arm_emit_base_file_entry (info,
- output_bfd, s,
- my_offset + 16))
- return false;
- }
- else
- {
- bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn,
- s->contents + my_offset);
- bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn,
- s->contents + my_offset + 2);
- ret_offset =
- /* Address of destination of the stub. */
- ((bfd_signed_vma) h_val)
- - ((bfd_signed_vma)
- /* Offset from the start of the current section to the start of the stubs. */
- (s->output_offset
- /* Offset of the start of this stub from the start of the stubs. */
- + my_offset
- /* Address of the start of the current section. */
- + s->output_section->vma)
- /* The branch instruction is 4 bytes into the stub. */
- + 4
- /* ARM branches work from the pc of the instruction + 8. */
- + 8);
- bfd_put_32 (output_bfd,
- (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF),
- s->contents + my_offset + 4);
- }
- }
- BFD_ASSERT (my_offset <= globals->thumb_glue_size);
- /* Now go back and fix up the original BL insn to point
- to here. */
- ret_offset =
- s->output_offset
- + my_offset
- - (input_section->output_offset
- + rel->r_vaddr)
- -4;
- tmp = bfd_get_32 (input_bfd, contents + rel->r_vaddr
- - input_section->vma);
- bfd_put_32 (output_bfd,
- (bfd_vma) insert_thumb_branch (tmp,
- ret_offset),
- contents + rel->r_vaddr - input_section->vma);
- done = 1;
- }
- }
- #endif
- }
- /* If the relocation type and destination symbol does not
- fall into one of the above categories, then we can just
- perform a direct link. */
- if (done)
- rstat = bfd_reloc_ok;
- else
- if ( h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- {
- asection *sec;
- sec = h->root.u.def.section;
- val = (h->root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- }
- else if (! bfd_link_relocatable (info))
- (*info->callbacks->undefined_symbol)
- (info, h->root.root.string, input_bfd, input_section,
- rel->r_vaddr - input_section->vma, true);
- }
- /* Emit a reloc if the backend thinks it needs it. */
- if (info->base_file
- && sym
- && pe_data(output_bfd)->in_reloc_p(output_bfd, howto)
- && !arm_emit_base_file_entry (info, output_bfd, input_section,
- rel->r_vaddr))
- return false;
- if (done)
- rstat = bfd_reloc_ok;
- #ifndef ARM_WINCE
- /* Only perform this fix during the final link, not a relocatable link. */
- else if (! bfd_link_relocatable (info)
- && howto->type == ARM_THUMB23)
- {
- /* This is pretty much a copy of what the default
- _bfd_final_link_relocate and _bfd_relocate_contents
- routines do to perform a relocation, with special
- processing for the split addressing of the Thumb BL
- instruction. Again, it would probably be simpler adding a
- ThumbBRANCH23 specific macro expansion into the default
- code. */
- bfd_vma address = rel->r_vaddr - input_section->vma;
- if (address > high_address)
- rstat = bfd_reloc_outofrange;
- else
- {
- bfd_vma relocation = val + addend;
- int size = bfd_get_reloc_size (howto);
- bool overflow = false;
- bfd_byte *location = contents + address;
- bfd_vma x = bfd_get_32 (input_bfd, location);
- 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;
- BFD_ASSERT (size == 4);
- /* howto->pc_relative should be TRUE for type 14 BRANCH23. */
- relocation -= (input_section->output_section->vma
- + input_section->output_offset);
- /* howto->pcrel_offset should be TRUE for type 14 BRANCH23. */
- relocation -= address;
- /* No need to negate the relocation with BRANCH23. */
- /* howto->complain_on_overflow == complain_overflow_signed for BRANCH23. */
- /* howto->rightshift == 1 */
- /* Drop unwanted bits from the value we are relocating to. */
- 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 = (((x) & 0x07ff0000) >> 4) | (((x) & 0x7ff) << 1);
- else
- add = ((((x) & 0x7ff) << 12) | (((x) & 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;
- /* howto->bitpos == 0 */
- /* Add the value from the object file, shifted so that it is a
- straight number. */
- signed_check += signed_add;
- relocation += signed_add;
- BFD_ASSERT (howto->complain_on_overflow == complain_overflow_signed);
- /* Assumes two's complement. */
- if ( signed_check > reloc_signed_max
- || signed_check < reloc_signed_min)
- overflow = true;
- /* Put the relocation into the correct bits.
- For a BLX instruction, make sure that the relocation is rounded up
- to a word boundary. This follows the semantics of the instruction
- which specifies that bit 1 of the target address will come from bit
- 1 of the base address. */
- if (bfd_big_endian (input_bfd))
- {
- if ((x & 0x1800) == 0x0800 && (relocation & 0x02))
- relocation += 2;
- relocation = (((relocation & 0xffe) >> 1) | ((relocation << 4) & 0x07ff0000));
- }
- else
- {
- if ((x & 0x18000000) == 0x08000000 && (relocation & 0x02))
- relocation += 2;
- relocation = (((relocation & 0xffe) << 15) | ((relocation >> 12) & 0x7ff));
- }
- /* Add the relocation to the correct bits of X. */
- x = ((x & ~howto->dst_mask) | relocation);
- /* Put the relocated value back in the object file. */
- bfd_put_32 (input_bfd, x, location);
- rstat = overflow ? bfd_reloc_overflow : bfd_reloc_ok;
- }
- }
- #endif
- else
- if (bfd_link_relocatable (info) && ! howto->partial_inplace)
- rstat = bfd_reloc_ok;
- else
- rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
- contents,
- rel->r_vaddr - input_section->vma,
- val, addend);
- /* Only perform this fix during the final link, not a relocatable link. */
- if (! bfd_link_relocatable (info)
- && (rel->r_type == ARM_32 || rel->r_type == ARM_RVA32))
- {
- /* Determine if we need to set the bottom bit of a relocated address
- because the address is the address of a Thumb code symbol. */
- int patchit = false;
- if (h != NULL
- && ( h->symbol_class == C_THUMBSTATFUNC
- || h->symbol_class == C_THUMBEXTFUNC))
- {
- patchit = true;
- }
- else if (sym != NULL
- && sym->n_scnum > N_UNDEF)
- {
- /* No hash entry - use the symbol instead. */
- if ( sym->n_sclass == C_THUMBSTATFUNC
- || sym->n_sclass == C_THUMBEXTFUNC)
- patchit = true;
- }
- if (patchit)
- {
- bfd_byte * location = contents + rel->r_vaddr - input_section->vma;
- bfd_vma x = bfd_get_32 (input_bfd, location);
- bfd_put_32 (input_bfd, x | 1, location);
- }
- }
- switch (rstat)
- {
- default:
- abort ();
- case bfd_reloc_ok:
- break;
- case bfd_reloc_outofrange:
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB: bad reloc address %#" PRIx64 " in section `%pA'"),
- input_bfd, (uint64_t) rel->r_vaddr, input_section);
- return false;
- case bfd_reloc_overflow:
- {
- const char *name;
- char buf[SYMNMLEN + 1];
- if (symndx == -1)
- name = "*ABS*";
- else if (h != NULL)
- name = NULL;
- else
- {
- name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
- if (name == NULL)
- return false;
- }
- (*info->callbacks->reloc_overflow)
- (info, (h ? &h->root : NULL), name, howto->name,
- (bfd_vma) 0, input_bfd, input_section,
- rel->r_vaddr - input_section->vma);
- }
- }
- }
- return true;
- }
- #ifndef COFF_IMAGE_WITH_PE
- bool
- bfd_arm_allocate_interworking_sections (struct bfd_link_info * info)
- {
- asection * s;
- bfd_byte * foo;
- struct coff_arm_link_hash_table * globals;
- globals = coff_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_alloc (globals->bfd_of_glue_owner, globals->arm_glue_size);
- s->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_alloc (globals->bfd_of_glue_owner, globals->thumb_glue_size);
- s->size = globals->thumb_glue_size;
- s->contents = foo;
- }
- return true;
- }
- static void
- record_arm_to_thumb_glue (struct bfd_link_info * info,
- struct coff_link_hash_entry * h)
- {
- const char * name = h->root.root.string;
- register asection * s;
- char * tmp_name;
- struct coff_link_hash_entry * myh;
- struct bfd_link_hash_entry * bh;
- struct coff_arm_link_hash_table * globals;
- bfd_vma val;
- size_t amt;
- globals = coff_arm_hash_table (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);
- amt = strlen (name) + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1;
- tmp_name = bfd_malloc (amt);
- BFD_ASSERT (tmp_name);
- sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name);
- myh = coff_link_hash_lookup
- (coff_hash_table (info), tmp_name, false, false, true);
- if (myh != NULL)
- {
- free (tmp_name);
- /* We've already seen this guy. */
- return;
- }
- /* The only trick here is using globals->arm_glue_size as the value. Even
- though the section isn't allocated yet, this is where we will be putting
- it. */
- bh = NULL;
- val = globals->arm_glue_size + 1;
- bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
- BSF_GLOBAL, s, val, NULL, true, false, &bh);
- free (tmp_name);
- globals->arm_glue_size += ARM2THUMB_GLUE_SIZE;
- return;
- }
- #ifndef ARM_WINCE
- static void
- record_thumb_to_arm_glue (struct bfd_link_info * info,
- struct coff_link_hash_entry * h)
- {
- const char * name = h->root.root.string;
- asection * s;
- char * tmp_name;
- struct coff_link_hash_entry * myh;
- struct bfd_link_hash_entry * bh;
- struct coff_arm_link_hash_table * globals;
- bfd_vma val;
- size_t amt;
- globals = coff_arm_hash_table (info);
- BFD_ASSERT (globals != NULL);
- 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);
- amt = strlen (name) + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1;
- tmp_name = bfd_malloc (amt);
- BFD_ASSERT (tmp_name);
- sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name);
- myh = coff_link_hash_lookup
- (coff_hash_table (info), tmp_name, false, false, true);
- if (myh != NULL)
- {
- free (tmp_name);
- /* We've already seen this guy. */
- return;
- }
- bh = NULL;
- val = globals->thumb_glue_size + 1;
- bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
- BSF_GLOBAL, s, val, NULL, true, false, &bh);
- /* If we mark it 'thumb', the disassembler will do a better job. */
- myh = (struct coff_link_hash_entry *) bh;
- myh->symbol_class = C_THUMBEXTFUNC;
- 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"
- amt = strlen (name) + strlen (CHANGE_TO_ARM) + 1;
- tmp_name = bfd_malloc (amt);
- BFD_ASSERT (tmp_name);
- sprintf (tmp_name, globals->support_old_code ? BACK_FROM_ARM : CHANGE_TO_ARM, name);
- bh = NULL;
- val = globals->thumb_glue_size + (globals->support_old_code ? 8 : 4);
- bfd_coff_link_add_one_symbol (info, globals->bfd_of_glue_owner, tmp_name,
- BSF_LOCAL, s, val, NULL, true, false, &bh);
- free (tmp_name);
- globals->thumb_glue_size += THUMB2ARM_GLUE_SIZE;
- return;
- }
- #endif /* not ARM_WINCE */
- /* 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/
- {armcoff/pe}.em */
- bool
- bfd_arm_get_bfd_for_interworking (bfd * abfd,
- struct bfd_link_info * info)
- {
- struct coff_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 (bfd_link_relocatable (info))
- return true;
- globals = coff_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_CODE | SEC_READONLY);
- sec = bfd_make_section_with_flags (abfd, ARM2THUMB_GLUE_SECTION_NAME,
- flags);
- if (sec == NULL
- || !bfd_set_section_alignment (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_CODE | SEC_READONLY);
- sec = bfd_make_section_with_flags (abfd, THUMB2ARM_GLUE_SECTION_NAME,
- flags);
- if (sec == NULL
- || !bfd_set_section_alignment (sec, 2))
- return false;
- }
- /* Save the bfd for later use. */
- globals->bfd_of_glue_owner = abfd;
- return true;
- }
- bool
- bfd_arm_process_before_allocation (bfd * abfd,
- struct bfd_link_info * info,
- int support_old_code)
- {
- asection * sec;
- struct coff_arm_link_hash_table * globals;
- /* If we are only performing a partial link do not bother
- to construct any glue. */
- if (bfd_link_relocatable (info))
- 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. */
- _bfd_coff_get_external_symbols (abfd);
- globals = coff_arm_hash_table (info);
- BFD_ASSERT (globals != NULL);
- BFD_ASSERT (globals->bfd_of_glue_owner != NULL);
- globals->support_old_code = support_old_code;
- /* Rummage around all the relocs and map the glue vectors. */
- sec = abfd->sections;
- if (sec == NULL)
- return true;
- for (; sec != NULL; sec = sec->next)
- {
- struct internal_reloc * i;
- struct internal_reloc * rel;
- if (sec->reloc_count == 0)
- continue;
- /* Load the relocs. */
- /* FIXME: there may be a storage leak here. */
- i = _bfd_coff_read_internal_relocs (abfd, sec, 1, 0, 0, 0);
- BFD_ASSERT (i != 0);
- for (rel = i; rel < i + sec->reloc_count; ++rel)
- {
- unsigned short r_type = rel->r_type;
- long symndx;
- struct coff_link_hash_entry * h;
- symndx = rel->r_symndx;
- /* If the relocation is not against a symbol it cannot concern us. */
- if (symndx == -1)
- continue;
- /* If the index is outside of the range of our table, something has gone wrong. */
- if (symndx >= obj_conv_table_size (abfd))
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: illegal symbol index in reloc: %ld"),
- abfd, symndx);
- continue;
- }
- h = obj_coff_sym_hashes (abfd)[symndx];
- /* 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 ARM_26:
- /* 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 (h->symbol_class == C_THUMBEXTFUNC)
- record_arm_to_thumb_glue (info, h);
- break;
- #ifndef ARM_WINCE
- case ARM_THUMB23:
- /* This one is a call from thumb code. We used to look
- for ARM_THUMB9 and ARM_THUMB12 as well. We need to look
- up the target of the call. If it is an arm target, we
- insert glue. If the symbol does not exist it will be
- given a class of C_EXT and so we will generate a stub
- for it. This is not really a problem, since the link
- is doomed anyway. */
- switch (h->symbol_class)
- {
- case C_EXT:
- case C_STAT:
- case C_LABEL:
- record_thumb_to_arm_glue (info, h);
- break;
- default:
- ;
- }
- break;
- #endif
- default:
- break;
- }
- }
- }
- return true;
- }
- #endif /* ! defined (COFF_IMAGE_WITH_PE) */
- #define coff_bfd_reloc_type_lookup coff_arm_reloc_type_lookup
- #define coff_bfd_reloc_name_lookup coff_arm_reloc_name_lookup
- #define coff_relocate_section coff_arm_relocate_section
- #define coff_bfd_is_local_label_name coff_arm_is_local_label_name
- #define coff_adjust_symndx coff_arm_adjust_symndx
- #define coff_link_output_has_begun coff_arm_link_output_has_begun
- #define coff_final_link_postscript coff_arm_final_link_postscript
- #define coff_bfd_merge_private_bfd_data coff_arm_merge_private_bfd_data
- #define coff_bfd_print_private_bfd_data coff_arm_print_private_bfd_data
- #define coff_bfd_set_private_flags _bfd_coff_arm_set_private_flags
- #define coff_bfd_copy_private_bfd_data coff_arm_copy_private_bfd_data
- #define coff_bfd_link_hash_table_create coff_arm_link_hash_table_create
- /* When doing a relocatable link, we want to convert ARM_26 relocs
- into ARM_26D relocs. */
- static bool
- coff_arm_adjust_symndx (bfd *obfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- bfd *ibfd,
- asection *sec,
- struct internal_reloc *irel,
- bool *adjustedp)
- {
- if (irel->r_type == ARM_26)
- {
- struct coff_link_hash_entry *h;
- h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->root.u.def.section->output_section == sec->output_section)
- irel->r_type = ARM_26D;
- }
- *adjustedp = false;
- return true;
- }
- /* Called when merging the private data areas of two BFDs.
- This is important as it allows us to detect if we are
- attempting to merge binaries compiled for different ARM
- targets, eg different CPUs or different APCS's. */
- static bool
- coff_arm_merge_private_bfd_data (bfd * ibfd, struct bfd_link_info *info)
- {
- bfd *obfd = info->output_bfd;
- BFD_ASSERT (ibfd != NULL && obfd != NULL);
- if (ibfd == obfd)
- return true;
- /* If the two formats are different we cannot merge anything.
- This is not an error, since it is permissable to change the
- input and output formats. */
- if ( ibfd->xvec->flavour != bfd_target_coff_flavour
- || obfd->xvec->flavour != bfd_target_coff_flavour)
- return true;
- /* Determine what should happen if the input ARM architecture
- does not match the output ARM architecture. */
- if (! bfd_arm_merge_machines (ibfd, obfd))
- return false;
- /* Verify that the APCS is the same for the two BFDs. */
- if (APCS_SET (ibfd))
- {
- if (APCS_SET (obfd))
- {
- /* If the src and dest have different APCS flag bits set, fail. */
- if (APCS_26_FLAG (obfd) != APCS_26_FLAG (ibfd))
- {
- _bfd_error_handler
- /* xgettext: c-format */
- (_("error: %pB is compiled for APCS-%d, "
- "whereas %pB is compiled for APCS-%d"),
- ibfd, APCS_26_FLAG (ibfd) ? 26 : 32,
- obfd, APCS_26_FLAG (obfd) ? 26 : 32
- );
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
- if (APCS_FLOAT_FLAG (obfd) != APCS_FLOAT_FLAG (ibfd))
- {
- if (APCS_FLOAT_FLAG (ibfd))
- /* xgettext: c-format */
- _bfd_error_handler
- (_("error: %pB passes floats in float registers, "
- "whereas %pB passes them in integer registers"),
- ibfd, obfd);
- else
- /* xgettext: c-format */
- _bfd_error_handler
- (_("error: %pB passes floats in integer registers, "
- "whereas %pB passes them in float registers"),
- ibfd, obfd);
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
- if (PIC_FLAG (obfd) != PIC_FLAG (ibfd))
- {
- if (PIC_FLAG (ibfd))
- /* xgettext: c-format */
- _bfd_error_handler
- (_("error: %pB is compiled as position independent code, "
- "whereas target %pB is absolute position"),
- ibfd, obfd);
- else
- /* xgettext: c-format */
- _bfd_error_handler
- (_("error: %pB is compiled as absolute position code, "
- "whereas target %pB is position independent"),
- ibfd, obfd);
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
- }
- else
- {
- SET_APCS_FLAGS (obfd, APCS_26_FLAG (ibfd) | APCS_FLOAT_FLAG (ibfd) | PIC_FLAG (ibfd));
- /* Set up the arch and fields as well as these are probably wrong. */
- bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd));
- }
- }
- /* Check the interworking support. */
- if (INTERWORK_SET (ibfd))
- {
- if (INTERWORK_SET (obfd))
- {
- /* If the src and dest differ in their interworking issue a warning. */
- if (INTERWORK_FLAG (obfd) != INTERWORK_FLAG (ibfd))
- {
- if (INTERWORK_FLAG (ibfd))
- /* xgettext: c-format */
- _bfd_error_handler (_("warning: %pB supports interworking, "
- "whereas %pB does not"),
- ibfd, obfd);
- else
- /* xgettext: c-format */
- _bfd_error_handler
- (_("warning: %pB does not support interworking, "
- "whereas %pB does"),
- ibfd, obfd);
- }
- }
- else
- {
- SET_INTERWORK_FLAG (obfd, INTERWORK_FLAG (ibfd));
- }
- }
- return true;
- }
- /* Display the flags field. */
- static bool
- coff_arm_print_private_bfd_data (bfd * abfd, void * ptr)
- {
- FILE * file = (FILE *) ptr;
- BFD_ASSERT (abfd != NULL && ptr != NULL);
- fprintf (file, _("private flags = %x:"), coff_data (abfd)->flags);
- if (APCS_SET (abfd))
- {
- /* xgettext: APCS is ARM Procedure Call Standard, it should not be translated. */
- fprintf (file, " [APCS-%d]", APCS_26_FLAG (abfd) ? 26 : 32);
- if (APCS_FLOAT_FLAG (abfd))
- fprintf (file, _(" [floats passed in float registers]"));
- else
- fprintf (file, _(" [floats passed in integer registers]"));
- if (PIC_FLAG (abfd))
- fprintf (file, _(" [position independent]"));
- else
- fprintf (file, _(" [absolute position]"));
- }
- if (! INTERWORK_SET (abfd))
- fprintf (file, _(" [interworking flag not initialised]"));
- else if (INTERWORK_FLAG (abfd))
- fprintf (file, _(" [interworking supported]"));
- else
- fprintf (file, _(" [interworking not supported]"));
- fputc ('\n', file);
- return true;
- }
- /* Copies the given flags into the coff_tdata.flags field.
- Typically these flags come from the f_flags[] field of
- the COFF filehdr structure, which contains important,
- target specific information.
- Note: Although this function is static, it is explicitly
- called from both coffcode.h and peicode.h. */
- static bool
- _bfd_coff_arm_set_private_flags (bfd * abfd, flagword flags)
- {
- flagword flag;
- BFD_ASSERT (abfd != NULL);
- flag = (flags & F_APCS26) ? F_APCS_26 : 0;
- /* Make sure that the APCS field has not been initialised to the opposite
- value. */
- if (APCS_SET (abfd)
- && ( (APCS_26_FLAG (abfd) != flag)
- || (APCS_FLOAT_FLAG (abfd) != (flags & F_APCS_FLOAT))
- || (PIC_FLAG (abfd) != (flags & F_PIC))
- ))
- return false;
- flag |= (flags & (F_APCS_FLOAT | F_PIC));
- SET_APCS_FLAGS (abfd, flag);
- flag = (flags & F_INTERWORK);
- /* If the BFD has already had its interworking flag set, but it
- is different from the value that we have been asked to set,
- then assume that that merged code will not support interworking
- and set the flag accordingly. */
- if (INTERWORK_SET (abfd) && (INTERWORK_FLAG (abfd) != flag))
- {
- if (flag)
- _bfd_error_handler (_("warning: not setting interworking flag of %pB since it has already been specified as non-interworking"),
- abfd);
- else
- _bfd_error_handler (_("warning: clearing the interworking flag of %pB due to outside request"),
- abfd);
- flag = 0;
- }
- SET_INTERWORK_FLAG (abfd, flag);
- return true;
- }
- /* Copy the important parts of the target specific data
- from one instance of a BFD to another. */
- static bool
- coff_arm_copy_private_bfd_data (bfd * src, bfd * dest)
- {
- BFD_ASSERT (src != NULL && dest != NULL);
- if (src == dest)
- return true;
- /* If the destination is not in the same format as the source, do not do
- the copy. */
- if (src->xvec != dest->xvec)
- return true;
- /* Copy the flags field. */
- if (APCS_SET (src))
- {
- if (APCS_SET (dest))
- {
- /* If the src and dest have different APCS flag bits set, fail. */
- if (APCS_26_FLAG (dest) != APCS_26_FLAG (src))
- return false;
- if (APCS_FLOAT_FLAG (dest) != APCS_FLOAT_FLAG (src))
- return false;
- if (PIC_FLAG (dest) != PIC_FLAG (src))
- return false;
- }
- else
- SET_APCS_FLAGS (dest, APCS_26_FLAG (src) | APCS_FLOAT_FLAG (src)
- | PIC_FLAG (src));
- }
- if (INTERWORK_SET (src))
- {
- if (INTERWORK_SET (dest))
- {
- /* If the src and dest have different interworking flags then turn
- off the interworking bit. */
- if (INTERWORK_FLAG (dest) != INTERWORK_FLAG (src))
- {
- if (INTERWORK_FLAG (dest))
- {
- /* xgettext:c-format */
- _bfd_error_handler
- (_("warning: clearing the interworking flag of %pB "
- "because non-interworking code in %pB has been "
- "linked with it"),
- dest, src);
- }
- SET_INTERWORK_FLAG (dest, 0);
- }
- }
- else
- {
- SET_INTERWORK_FLAG (dest, INTERWORK_FLAG (src));
- }
- }
- return true;
- }
- /* Note: the definitions here of LOCAL_LABEL_PREFIX and USER_LABEL_PREIFX
- *must* match the definitions in gcc/config/arm/{coff|semi|aout}.h. */
- #ifndef LOCAL_LABEL_PREFIX
- #define LOCAL_LABEL_PREFIX ""
- #endif
- #ifndef USER_LABEL_PREFIX
- #define USER_LABEL_PREFIX "_"
- #endif
- /* Like _bfd_coff_is_local_label_name, but
- a) test against USER_LABEL_PREFIX, to avoid stripping labels known to be
- non-local.
- b) Allow other prefixes than ".", e.g. an empty prefix would cause all
- labels of the form Lxxx to be stripped. */
- static bool
- coff_arm_is_local_label_name (bfd * abfd ATTRIBUTE_UNUSED,
- const char * name)
- {
- #ifdef USER_LABEL_PREFIX
- if (USER_LABEL_PREFIX[0] != 0)
- {
- size_t len = strlen (USER_LABEL_PREFIX);
- if (strncmp (name, USER_LABEL_PREFIX, len) == 0)
- return false;
- }
- #endif
- #ifdef LOCAL_LABEL_PREFIX
- /* If there is a prefix for local labels then look for this.
- If the prefix exists, but it is empty, then ignore the test. */
- if (LOCAL_LABEL_PREFIX[0] != 0)
- {
- size_t len = strlen (LOCAL_LABEL_PREFIX);
- if (strncmp (name, LOCAL_LABEL_PREFIX, len) != 0)
- return false;
- /* Perform the checks below for the rest of the name. */
- name += len;
- }
- #endif
- return name[0] == 'L';
- }
- /* This piece of machinery exists only to guarantee that the bfd that holds
- the glue section is written last.
- This does depend on bfd_make_section attaching a new section to the
- end of the section list for the bfd. */
- static bool
- coff_arm_link_output_has_begun (bfd * sub, struct coff_final_link_info * info)
- {
- return (sub->output_has_begun
- || sub == coff_arm_hash_table (info->info)->bfd_of_glue_owner);
- }
- static bool
- coff_arm_final_link_postscript (bfd * abfd ATTRIBUTE_UNUSED,
- struct coff_final_link_info * pfinfo)
- {
- struct coff_arm_link_hash_table * globals;
- globals = coff_arm_hash_table (pfinfo->info);
- BFD_ASSERT (globals != NULL);
- if (globals->bfd_of_glue_owner != NULL)
- {
- if (! _bfd_coff_link_input_bfd (pfinfo, globals->bfd_of_glue_owner))
- return false;
- globals->bfd_of_glue_owner->output_has_begun = true;
- }
- return bfd_arm_update_notes (abfd, ARM_NOTE_SECTION);
- }
- #ifndef bfd_pe_print_pdata
- #define bfd_pe_print_pdata NULL
- #endif
- #include "coffcode.h"
- #ifndef TARGET_LITTLE_SYM
- #define TARGET_LITTLE_SYM arm_coff_le_vec
- #endif
- #ifndef TARGET_LITTLE_NAME
- #define TARGET_LITTLE_NAME "coff-arm-little"
- #endif
- #ifndef TARGET_BIG_SYM
- #define TARGET_BIG_SYM arm_coff_be_vec
- #endif
- #ifndef TARGET_BIG_NAME
- #define TARGET_BIG_NAME "coff-arm-big"
- #endif
- #ifndef TARGET_UNDERSCORE
- #define TARGET_UNDERSCORE 0
- #endif
- #ifndef EXTRA_S_FLAGS
- #ifdef COFF_WITH_PE
- #define EXTRA_S_FLAGS (SEC_CODE | SEC_LINK_ONCE | SEC_LINK_DUPLICATES)
- #else
- #define EXTRA_S_FLAGS SEC_CODE
- #endif
- #endif
- /* Forward declaration for use initialising alternative_target field. */
- extern const bfd_target TARGET_BIG_SYM ;
- /* Target vectors. */
- CREATE_LITTLE_COFF_TARGET_VEC (TARGET_LITTLE_SYM, TARGET_LITTLE_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_BIG_SYM, COFF_SWAP_TABLE)
- CREATE_BIG_COFF_TARGET_VEC (TARGET_BIG_SYM, TARGET_BIG_NAME, D_PAGED, EXTRA_S_FLAGS, TARGET_UNDERSCORE, & TARGET_LITTLE_SYM, COFF_SWAP_TABLE)
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