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2009-06-12 Tristan Gingold <gingold@adacore.com>

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* reloc.c: Add BFD_RELOC_MACH_O_SECTDIFF and BFD_RELOC_MACH_O_PAIR.
	* bfd-in2.h: Regenerated.
	* libbfd.h: Regenerated.

	* mach-o.c (FILE_ALIGN): New macro.
	(bfd_mach_o_canonicalize_symtab): Adjust for bfd_mach_o_asymbol.
	(bfd_mach_o_print_symbol): Ditto.
	(bfd_mach_o_scan_write_thread): Adjust type of variable offset.
	(bfd_mach_o_get_reloc_upper_bound): New function.
	(bfd_mach_o_canonicalize_reloc): Ditto.
	(bfd_mach_o_scan_write_relocs): Ditto.
	(bfd_mach_o_scan_write_section_32): Remove offset argument.
	(bfd_mach_o_scan_write_section_64): Ditto.
	(bfd_mach_o_scan_write_segment_32): Write relocs.  Fix size of data
	written for load command.  Do not compute section file offset.
	(bfd_mach_o_scan_write_segment_64): Ditto.
	(bfd_mach_o_scan_write_symtab): Compute file offset first.
	Adjust for bfd_mach_o_asymbol.  Move code to convert from BFD to
	Mach-O to ...
	(bfd_mach_o_mangle_symbols): ... this new function.
	(bfd_mach_o_write_contents): Be sure to habe load commands built.
	Call bfd_mach_o_mangle_symbols.
	(bfd_mach_o_build_commands): Adjust for filelen field.
	Use FILE_ALIGN macro.  Clear section file offset if section is empty.
	Do not set symtab file offset anymore here.
	(bfd_mach_o_make_empty_symbol): Allocate a bfd_mach_o_asymbol.
	(bfd_mach_o_make_bfd_section): Set SEC_RELOC if has reloc.
	Set reloc_count and rel_filepos section fields.
	(bfd_mach_o_scan_read_section_32): Type of argument offset is now
	unsigned int.
	(bfd_mach_o_scan_read_section_64): Ditto.
	(bfd_mach_o_scan_read_section): Ditto.
	(bfd_mach_o_scan_read_symtab_symbol): Typr of argument s is now
	bfd_mach_o_asymbol.  Use unsigned int for file offset type.
	(bfd_mach_o_scan_read_symtab_symbol): Adjust for bfd_mach_o_asymbol.
	Handle weak-ref symbols.
	(bfd_mach_o_scan_read_symtab_symbols): Adjust for bfd_mach_o_asymbol.
	(bfd_mach_o_scan_read_dysymtab_symbol): Ditto.
	(bfd_mach_o_scan): Remove assignment to removed field.
	(bfd_mach_o_mkobject_init): Ditto.
	(bfd_mach_o_bfd_print_private_bfd_data): Adjust printf formatter.
	(bfd_mach_o_bfd_reloc_type_lookup): New macro.
	(bfd_mach_o_bfd_reloc_name_lookup): Ditto.
	(bfd_mach_o_swap_reloc_in): Ditto.
	(bfd_mach_o_swap_reloc_out): Ditto.

	* mach-o.h (BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY)
	(BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY)
	(BFD_MACH_O_REFERENCE_FLAG_DEFINED)
	(BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED)
	(BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
	(BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY)
	(BFD_MACH_O_REFERENCED_DYNAMICALLY, BFD_MACH_O_N_DESC_DISCARDED)
	(BFD_MACH_O_N_NO_DEAD_STRIP, BFD_MACH_O_N_WEAK_REF)
	(BFD_MACH_O_N_WEAK_DEF): New macros.
	Add comments.
	(bfd_mach_o_section_type): Add new enumeration values.
	(BFD_MACH_O_S_SELF_MODIFYING_CODE)
	(BFD_MACH_O_S_ATTR_LIVE_SUPPORT)
	(BFD_MACH_O_S_ATTR_NO_DEAD_STRIP)
	(BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS, BFD_MACH_O_S_ATTR_NO_TOC): New
	macros.
	(BFD_MACH_O_GENERIC_RELOC_VANILLA)
	(BFD_MACH_O_GENERIC_RELOC_PAIR)
	(BFD_MACH_O_GENERIC_RELOC_SECTDIFF)
	(BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR)
	(BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF): Ditto.
	(BFD_MACH_O_RELENT_SIZE): Ditto.
	(BFD_MACH_O_R_PCREL, BFD_MACH_O_GET_R_LENGTH)
	(BFD_MACH_O_R_EXTERN, BFD_MACH_O_GET_R_TYPE)
	(BFD_MACH_O_GET_R_SYMBOLNUM, BFD_MACH_O_SET_R_LENGTH)
	(BFD_MACH_O_SET_R_TYPE, BFD_MACH_O_SET_R_SYMBOLNUM): Ditto.
	(BFD_MACH_O_SR_SCATTERED, BFD_MACH_O_SR_PCREL)
	(BFD_MACH_O_GET_SR_LENGTH, BFD_MACH_O_GET_SR_TYPE)
	(BFD_MACH_O_GET_SR_ADDRESS, BFD_MACH_O_SET_SR_LENGTH)
	(BFD_MACH_O_SET_SR_TYPE, BFD_MACH_O_SET_SR_ADDRESS): Ditto.
	(bfd_mach_o_reloc_info): New struct.
	(bfd_mach_o_asymbol): New struct.
	(bfd_mach_o_symtab_command): The symbols field is now of type
	bfd_mach_o_asymbol.
	(bfd_mach_o_load_command): The offset and len fields are now of type
	unsigned int.
	(mach_o_data_struct): Remove symbols, nsymbols and ibfd fields.
	Add a filelen field.  Add comments.
	(bfd_mach_o_backend_data): New struct.
	(bfd_mach_o_get_backend_data): New macro.
	(bfd_mach_o_scan_read_symtab_symbol): Parameter symbol now of type
	bfd_mach_o_asymbol.
	(bfd_mach_o_scan_read_dysymtab_symbol): Ditto.
	(bfd_mach_o_get_reloc_upper_bound): New prototype.
	(bfd_mach_o_canonicalize_reloc): Ditto.

	* mach-o-target.c (bfd_mach_o_bfd_is_local_label_name): Remove
	duplicated macro.  Now defined to _bfd_generic_is_local_label.
	(TARGET_NAME_BACKEND): New macro...
	(TARGET_NAME_BACKEND): ... used to name a new variable.
	(TARGET_NAME): Define relocs table using bfd_mach_o, reference
	Mach-O backend data.

	* mach-o-i386.c (i386_howto_table): New variable.
	(bfd_mach_o_i386_swap_reloc_in): New function.
	(bfd_mach_o_i386_swap_reloc_out): Ditto.
	(bfd_mach_o_i386_bfd_reloc_type_lookup): Ditto.
	(bfd_mach_o_i386_bfd_reloc_name_lookup): Ditto.
	(bfd_mach_o_swap_reloc_in, bfd_mach_o_swap_reloc_out): New macros.
	(bfd_mach_o_bfd_reloc_type_lookup)
	(bfd_mach_o_bfd_reloc_name_lookup): Ditto.
This commit is contained in:
Tristan Gingold 2009-06-12 09:15:46 +00:00
parent c59fcb4cd4
commit 92bc0e8020
8 changed files with 810 additions and 175 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

110
bfd/ChangeLog
View File

@ -1,3 +1,113 @@
2009-06-12 Tristan Gingold <gingold@adacore.com>
* reloc.c: Add BFD_RELOC_MACH_O_SECTDIFF and BFD_RELOC_MACH_O_PAIR.
* bfd-in2.h: Regenerated.
* libbfd.h: Regenerated.
* mach-o.c (FILE_ALIGN): New macro.
(bfd_mach_o_canonicalize_symtab): Adjust for bfd_mach_o_asymbol.
(bfd_mach_o_print_symbol): Ditto.
(bfd_mach_o_scan_write_thread): Adjust type of variable offset.
(bfd_mach_o_get_reloc_upper_bound): New function.
(bfd_mach_o_canonicalize_reloc): Ditto.
(bfd_mach_o_scan_write_relocs): Ditto.
(bfd_mach_o_scan_write_section_32): Remove offset argument.
(bfd_mach_o_scan_write_section_64): Ditto.
(bfd_mach_o_scan_write_segment_32): Write relocs. Fix size of data
written for load command. Do not compute section file offset.
(bfd_mach_o_scan_write_segment_64): Ditto.
(bfd_mach_o_scan_write_symtab): Compute file offset first.
Adjust for bfd_mach_o_asymbol. Move code to convert from BFD to
Mach-O to ...
(bfd_mach_o_mangle_symbols): ... this new function.
(bfd_mach_o_write_contents): Be sure to habe load commands built.
Call bfd_mach_o_mangle_symbols.
(bfd_mach_o_build_commands): Adjust for filelen field.
Use FILE_ALIGN macro. Clear section file offset if section is empty.
Do not set symtab file offset anymore here.
(bfd_mach_o_make_empty_symbol): Allocate a bfd_mach_o_asymbol.
(bfd_mach_o_make_bfd_section): Set SEC_RELOC if has reloc.
Set reloc_count and rel_filepos section fields.
(bfd_mach_o_scan_read_section_32): Type of argument offset is now
unsigned int.
(bfd_mach_o_scan_read_section_64): Ditto.
(bfd_mach_o_scan_read_section): Ditto.
(bfd_mach_o_scan_read_symtab_symbol): Typr of argument s is now
bfd_mach_o_asymbol. Use unsigned int for file offset type.
(bfd_mach_o_scan_read_symtab_symbol): Adjust for bfd_mach_o_asymbol.
Handle weak-ref symbols.
(bfd_mach_o_scan_read_symtab_symbols): Adjust for bfd_mach_o_asymbol.
(bfd_mach_o_scan_read_dysymtab_symbol): Ditto.
(bfd_mach_o_scan): Remove assignment to removed field.
(bfd_mach_o_mkobject_init): Ditto.
(bfd_mach_o_bfd_print_private_bfd_data): Adjust printf formatter.
(bfd_mach_o_bfd_reloc_type_lookup): New macro.
(bfd_mach_o_bfd_reloc_name_lookup): Ditto.
(bfd_mach_o_swap_reloc_in): Ditto.
(bfd_mach_o_swap_reloc_out): Ditto.
* mach-o.h (BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY)
(BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY)
(BFD_MACH_O_REFERENCE_FLAG_DEFINED)
(BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED)
(BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY)
(BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY)
(BFD_MACH_O_REFERENCED_DYNAMICALLY, BFD_MACH_O_N_DESC_DISCARDED)
(BFD_MACH_O_N_NO_DEAD_STRIP, BFD_MACH_O_N_WEAK_REF)
(BFD_MACH_O_N_WEAK_DEF): New macros.
Add comments.
(bfd_mach_o_section_type): Add new enumeration values.
(BFD_MACH_O_S_SELF_MODIFYING_CODE)
(BFD_MACH_O_S_ATTR_LIVE_SUPPORT)
(BFD_MACH_O_S_ATTR_NO_DEAD_STRIP)
(BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS, BFD_MACH_O_S_ATTR_NO_TOC): New
macros.
(BFD_MACH_O_GENERIC_RELOC_VANILLA)
(BFD_MACH_O_GENERIC_RELOC_PAIR)
(BFD_MACH_O_GENERIC_RELOC_SECTDIFF)
(BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR)
(BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF): Ditto.
(BFD_MACH_O_RELENT_SIZE): Ditto.
(BFD_MACH_O_R_PCREL, BFD_MACH_O_GET_R_LENGTH)
(BFD_MACH_O_R_EXTERN, BFD_MACH_O_GET_R_TYPE)
(BFD_MACH_O_GET_R_SYMBOLNUM, BFD_MACH_O_SET_R_LENGTH)
(BFD_MACH_O_SET_R_TYPE, BFD_MACH_O_SET_R_SYMBOLNUM): Ditto.
(BFD_MACH_O_SR_SCATTERED, BFD_MACH_O_SR_PCREL)
(BFD_MACH_O_GET_SR_LENGTH, BFD_MACH_O_GET_SR_TYPE)
(BFD_MACH_O_GET_SR_ADDRESS, BFD_MACH_O_SET_SR_LENGTH)
(BFD_MACH_O_SET_SR_TYPE, BFD_MACH_O_SET_SR_ADDRESS): Ditto.
(bfd_mach_o_reloc_info): New struct.
(bfd_mach_o_asymbol): New struct.
(bfd_mach_o_symtab_command): The symbols field is now of type
bfd_mach_o_asymbol.
(bfd_mach_o_load_command): The offset and len fields are now of type
unsigned int.
(mach_o_data_struct): Remove symbols, nsymbols and ibfd fields.
Add a filelen field. Add comments.
(bfd_mach_o_backend_data): New struct.
(bfd_mach_o_get_backend_data): New macro.
(bfd_mach_o_scan_read_symtab_symbol): Parameter symbol now of type
bfd_mach_o_asymbol.
(bfd_mach_o_scan_read_dysymtab_symbol): Ditto.
(bfd_mach_o_get_reloc_upper_bound): New prototype.
(bfd_mach_o_canonicalize_reloc): Ditto.
* mach-o-target.c (bfd_mach_o_bfd_is_local_label_name): Remove
duplicated macro. Now defined to _bfd_generic_is_local_label.
(TARGET_NAME_BACKEND): New macro...
(TARGET_NAME_BACKEND): ... used to name a new variable.
(TARGET_NAME): Define relocs table using bfd_mach_o, reference
Mach-O backend data.
* mach-o-i386.c (i386_howto_table): New variable.
(bfd_mach_o_i386_swap_reloc_in): New function.
(bfd_mach_o_i386_swap_reloc_out): Ditto.
(bfd_mach_o_i386_bfd_reloc_type_lookup): Ditto.
(bfd_mach_o_i386_bfd_reloc_name_lookup): Ditto.
(bfd_mach_o_swap_reloc_in, bfd_mach_o_swap_reloc_out): New macros.
(bfd_mach_o_bfd_reloc_type_lookup)
(bfd_mach_o_bfd_reloc_name_lookup): Ditto.
2009-06-11 Anthony Green <green@moxielogic.com>
* reloc.c: Add BFD_RELOC_MOXIE_10_PCREL.

7
bfd/bfd-in2.h
View File

@ -4499,6 +4499,13 @@ BFD_RELOC_XTENSA_ASM_EXPAND. */
BFD_RELOC_LM32_GLOB_DAT,
BFD_RELOC_LM32_JMP_SLOT,
BFD_RELOC_LM32_RELATIVE,
/* Difference between two section addreses. Must be followed by a
BFD_RELOC_MACH_O_PAIR. */
BFD_RELOC_MACH_O_SECTDIFF,
/* Mach-O generic relocations. */
BFD_RELOC_MACH_O_PAIR,
BFD_RELOC_UNUSED };
typedef enum bfd_reloc_code_real bfd_reloc_code_real_type;
reloc_howto_type *bfd_reloc_type_lookup

2
bfd/libbfd.h
View File

@ -2069,6 +2069,8 @@ static const char *const bfd_reloc_code_real_names[] = { "@@uninitialized@@",
"BFD_RELOC_LM32_GLOB_DAT",
"BFD_RELOC_LM32_JMP_SLOT",
"BFD_RELOC_LM32_RELATIVE",
"BFD_RELOC_MACH_O_SECTDIFF",
"BFD_RELOC_MACH_O_PAIR",
"@@overflow: BFD_RELOC_UNUSED@@",
};
#endif

164
bfd/mach-o-i386.c
View File

@ -60,9 +60,171 @@ bfd_mach_o_i386_mkobject (bfd *abfd)
return TRUE;
}
static reloc_howto_type i386_howto_table[]=
{
HOWTO(BFD_RELOC_32, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "32",
FALSE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(BFD_RELOC_16, 0, 1, 16, FALSE, 0,
complain_overflow_bitfield,
NULL, "16",
FALSE, 0xffff, 0xffff, FALSE),
HOWTO(BFD_RELOC_8, 0, 0, 8, FALSE, 0,
complain_overflow_bitfield,
NULL, "8",
FALSE, 0xff, 0xff, FALSE),
HOWTO(BFD_RELOC_32_PCREL, 0, 2, 32, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP32",
FALSE, 0xffffffff, 0xffffffff, TRUE),
HOWTO(BFD_RELOC_16_PCREL, 0, 1, 16, TRUE, 0,
complain_overflow_bitfield,
NULL, "DISP16",
FALSE, 0xffff, 0xffff, TRUE),
HOWTO(BFD_RELOC_MACH_O_SECTDIFF, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "SECTDIFF_32",
FALSE, 0xffffffff, 0xffffffff, FALSE),
HOWTO(BFD_RELOC_MACH_O_PAIR, 0, 2, 32, FALSE, 0,
complain_overflow_bitfield,
NULL, "PAIR_32",
FALSE, 0xffffffff, 0xffffffff, FALSE),
};
static bfd_boolean
bfd_mach_o_i386_swap_reloc_in (arelent *res, bfd_mach_o_reloc_info *reloc)
{
if (reloc->r_scattered)
{
switch (reloc->r_type)
{
case BFD_MACH_O_GENERIC_RELOC_PAIR:
if (reloc->r_length != 2)
return FALSE;
res->howto = &i386_howto_table[3];
res->address = res[-1].address;
return TRUE;
case BFD_MACH_O_GENERIC_RELOC_SECTDIFF:
case BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF:
if (reloc->r_length != 2)
return FALSE;
res->howto = &i386_howto_table[2];
return TRUE;
default:
return FALSE;
}
}
else
{
switch (reloc->r_type)
{
case BFD_MACH_O_GENERIC_RELOC_VANILLA:
switch ((reloc->r_length << 1) | reloc->r_pcrel)
{
case 0: /* len = 0, pcrel = 0 */
res->howto = &i386_howto_table[2];
return TRUE;
case 2: /* len = 1, pcrel = 0 */
res->howto = &i386_howto_table[1];
return TRUE;
case 3: /* len = 1, pcrel = 1 */
res->howto = &i386_howto_table[4];
return TRUE;
case 4: /* len = 2, pcrel = 0 */
res->howto = &i386_howto_table[0];
return TRUE;
case 5: /* len = 2, pcrel = 1 */
res->howto = &i386_howto_table[3];
return TRUE;
default:
return FALSE;
}
break;
default:
return FALSE;
}
}
}
static bfd_boolean
bfd_mach_o_i386_swap_reloc_out (arelent *rel, bfd_mach_o_reloc_info *rinfo)
{
rinfo->r_address = rel->address;
switch (rel->howto->type)
{
case BFD_RELOC_32:
case BFD_RELOC_32_PCREL:
case BFD_RELOC_16:
case BFD_RELOC_16_PCREL:
case BFD_RELOC_8:
rinfo->r_scattered = 0;
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_VANILLA;
rinfo->r_pcrel = rel->howto->pc_relative;
rinfo->r_length = rel->howto->size; /* Correct in practice. */
if ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM)
{
rinfo->r_extern = 0;
rinfo->r_value = (*rel->sym_ptr_ptr)->section->target_index;
}
else
{
rinfo->r_extern = 1;
rinfo->r_value = (*rel->sym_ptr_ptr)->udata.i;
}
break;
case BFD_RELOC_MACH_O_SECTDIFF:
rinfo->r_scattered = 1;
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_SECTDIFF;
rinfo->r_pcrel = 0;
rinfo->r_length = 2;
rinfo->r_extern = 0;
rinfo->r_value = (*rel->sym_ptr_ptr)->value
+ (*rel->sym_ptr_ptr)->section->vma;
break;
case BFD_RELOC_MACH_O_PAIR:
rinfo->r_address = 0;
rinfo->r_scattered = 1;
rinfo->r_type = BFD_MACH_O_GENERIC_RELOC_PAIR;
rinfo->r_pcrel = 0;
rinfo->r_length = 2;
rinfo->r_extern = 0;
rinfo->r_value = (*rel->sym_ptr_ptr)->value
+ (*rel->sym_ptr_ptr)->section->vma;
break;
default:
return FALSE;
}
return TRUE;
}
static reloc_howto_type *
bfd_mach_o_i386_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = 0; i < sizeof (i386_howto_table) / sizeof (*i386_howto_table); i++)
if (code == i386_howto_table[i].type)
return &i386_howto_table[i];
return NULL;
}
static reloc_howto_type *
bfd_mach_o_i386_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
const char *name ATTRIBUTE_UNUSED)
{
return NULL;
}
#define bfd_mach_o_swap_reloc_in bfd_mach_o_i386_swap_reloc_in
#define bfd_mach_o_swap_reloc_out bfd_mach_o_i386_swap_reloc_out
#define bfd_mach_o_bfd_reloc_type_lookup bfd_mach_o_i386_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup bfd_mach_o_i386_bfd_reloc_name_lookup
#define TARGET_NAME mach_o_i386_vec
#define TARGET_STRING "mach-o-i386"
#define TARGET_BIG_ENDIAN 0
#define TARGET_ARCHIVE 0
#include "mach-o-target.c"

17
bfd/mach-o-target.c
View File

@ -39,9 +39,8 @@
#define bfd_mach_o_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
#define bfd_mach_o_new_section_hook _bfd_generic_new_section_hook
#define bfd_mach_o_get_section_contents_in_window _bfd_generic_get_section_contents_in_window
#define bfd_mach_o_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
#define bfd_mach_o_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
#define bfd_mach_o_bfd_is_local_label_name _bfd_nosymbols_bfd_is_local_label_name
#define bfd_mach_o_bfd_is_local_label_name bfd_generic_is_local_label_name
#define bfd_mach_o_get_lineno _bfd_nosymbols_get_lineno
#define bfd_mach_o_find_nearest_line _bfd_nosymbols_find_nearest_line
#define bfd_mach_o_find_inliner_info _bfd_nosymbols_find_inliner_info
@ -69,6 +68,8 @@
#define bfd_mach_o_bfd_copy_private_header_data _bfd_generic_bfd_copy_private_header_data
#define bfd_mach_o_core_file_matches_executable_p generic_core_file_matches_executable_p
#define TARGET_NAME_BACKEND XCONCAT2(TARGET_NAME,_backend)
#endif /* MACH_O_TARGET_COMMON_DEFINED */
#ifndef TARGET_NAME
@ -91,6 +92,12 @@
#error Mach-O fat files must always be big-endian.
#endif /* ((TARGET_ARCHIVE) && (! TARGET_BIG_ENDIAN)) */
static const bfd_mach_o_backend_data TARGET_NAME_BACKEND =
{
bfd_mach_o_swap_reloc_in,
bfd_mach_o_swap_reloc_out
};
const bfd_target TARGET_NAME =
{
TARGET_STRING, /* Name. */
@ -162,13 +169,15 @@ const bfd_target TARGET_NAME =
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
#endif
BFD_JUMP_TABLE_SYMBOLS (bfd_mach_o),
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
BFD_JUMP_TABLE_RELOCS (bfd_mach_o),
BFD_JUMP_TABLE_WRITE (bfd_mach_o),
BFD_JUMP_TABLE_LINK (bfd_mach_o),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
/* Alternative endian target. */
NULL,
NULL
/* Back-end data. */
&TARGET_NAME_BACKEND
};

508
bfd/mach-o.c
View File

@ -31,6 +31,9 @@
#define bfd_mach_o_core_p bfd_mach_o_gen_core_p
#define bfd_mach_o_mkobject bfd_false
#define FILE_ALIGN(off, algn) \
(((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn)))
unsigned int
bfd_mach_o_version (bfd *abfd)
{
@ -351,7 +354,7 @@ bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation)
for (j = 0; j < sym->nsyms; j++)
{
BFD_ASSERT (csym < (alocation + nsyms));
*csym++ = &sym->symbols[j];
*csym++ = &sym->symbols[j].symbol;
}
}
}
@ -376,10 +379,8 @@ bfd_mach_o_print_symbol (bfd *abfd,
bfd_print_symbol_type how)
{
FILE *file = (FILE *) afile;
unsigned char ntype;
unsigned char nsect;
unsigned int ndesc;
const char *name;
bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol;
switch (how)
{
@ -388,13 +389,10 @@ bfd_mach_o_print_symbol (bfd *abfd,
break;
default:
bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
ntype = BFD_MACH_O_SYM_NTYPE (symbol);
nsect = BFD_MACH_O_SYM_NSECT (symbol);
ndesc = BFD_MACH_O_SYM_NDESC (symbol);
if (ntype & BFD_MACH_O_N_STAB)
name = bfd_get_stab_name (ntype);
if (asym->n_type & BFD_MACH_O_N_STAB)
name = bfd_get_stab_name (asym->n_type);
else
switch (ntype & BFD_MACH_O_N_TYPE)
switch (asym->n_type & BFD_MACH_O_N_TYPE)
{
case BFD_MACH_O_N_UNDF:
name = "UND";
@ -417,9 +415,10 @@ bfd_mach_o_print_symbol (bfd *abfd,
}
if (name == NULL)
name = "";
fprintf (file, " %02x %-6s %02x %04x", ntype, name, nsect, ndesc);
if ((ntype & BFD_MACH_O_N_STAB) == 0
&& (ntype & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
fprintf (file, " %02x %-6s %02x %04x",
asym->n_type, name, asym->n_sect, asym->n_desc);
if ((asym->n_type & BFD_MACH_O_N_STAB) == 0
&& (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT)
fprintf (file, " %-5s", symbol->section->name);
fprintf (file, " %s", symbol->name);
}
@ -503,7 +502,7 @@ bfd_mach_o_scan_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
bfd_mach_o_thread_command *cmd = &command->command.thread;
unsigned int i;
unsigned char buf[8];
bfd_vma offset;
unsigned int offset;
unsigned int nflavours;
BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
@ -529,10 +528,192 @@ bfd_mach_o_scan_write_thread (bfd *abfd, bfd_mach_o_load_command *command)
return 0;
}
long
bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
asection *asect)
{
return (asect->reloc_count + 1) * sizeof (arelent *);
}
long
bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
arelent **rels, asymbol **syms)
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
unsigned long i;
arelent *res;
char *native_relocs;
bfd_size_type native_size;
if (asect->reloc_count == 0)
return 0;
/* No need to go further if we don't know how to read relocs. */
if (bed->_bfd_mach_o_swap_reloc_in == NULL)
return 0;
/* Allocate and read relocs. */
native_size = asect->reloc_count * BFD_MACH_O_RELENT_SIZE;
native_relocs = bfd_malloc (native_size);
if (native_relocs == NULL)
return -1;
if (bfd_seek (abfd, asect->rel_filepos, SEEK_SET) != 0
|| bfd_bread (native_relocs, native_size, abfd) != native_size)
{
free (native_relocs);
return -1;
}
res = bfd_malloc (asect->reloc_count * sizeof (arelent));
if (res == NULL)
{
free (native_relocs);
return -1;
}
for (i = 0; i < asect->reloc_count; i++)
{
char *buf = native_relocs + BFD_MACH_O_RELENT_SIZE * i;
bfd_mach_o_reloc_info reloc;
bfd_vma addr;
bfd_vma symnum;
asymbol **sym;
addr = bfd_get_32 (abfd, buf + 0);
symnum = bfd_get_32 (abfd, buf + 4);
if (addr & BFD_MACH_O_SR_SCATTERED)
{
unsigned int j;
/* Scattered relocation.
Extract section and offset from r_value. */
res[i].sym_ptr_ptr = NULL;
res[i].addend = 0;
for (j = 0; j < mdata->nsects; j++)
{
bfd_mach_o_section *sect = mdata->sections[j];
if (symnum >= sect->addr && symnum < sect->addr + sect->size)
{
res[i].sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr;
res[i].addend = symnum - sect->addr;
break;
}
}
res[i].address = BFD_MACH_O_GET_SR_ADDRESS (addr);
reloc.r_type = BFD_MACH_O_GET_SR_TYPE (addr);
reloc.r_length = BFD_MACH_O_GET_SR_LENGTH (addr);
reloc.r_pcrel = addr & BFD_MACH_O_SR_PCREL;
reloc.r_scattered = 1;
}
else
{
unsigned int num = BFD_MACH_O_GET_R_SYMBOLNUM (symnum);
res[i].addend = 0;
res[i].address = addr;
if (symnum & BFD_MACH_O_R_EXTERN)
sym = syms + num;
else
{
BFD_ASSERT (num != 0);
BFD_ASSERT (num <= mdata->nsects);
sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
}
res[i].sym_ptr_ptr = sym;
reloc.r_type = BFD_MACH_O_GET_R_TYPE (symnum);
reloc.r_length = BFD_MACH_O_GET_R_LENGTH (symnum);
reloc.r_pcrel = (symnum & BFD_MACH_O_R_PCREL) ? 1 : 0;
reloc.r_scattered = 0;
}
if (!(*bed->_bfd_mach_o_swap_reloc_in)(&res[i], &reloc))
{
free (res);
free (native_relocs);
return -1;
}
rels[i] = &res[i];
}
asect->relocation = res;
free (native_relocs);
return i;
}
static bfd_boolean
bfd_mach_o_scan_write_relocs (bfd *abfd, bfd_mach_o_section *section)
{
bfd_mach_o_data_struct *mdata = bfd_get_mach_o_data (abfd);
unsigned int i;
arelent **entries;
asection *sec;
bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
sec = section->bfdsection;
if (sec->reloc_count == 0)
return TRUE;
if (bed->_bfd_mach_o_swap_reloc_out == NULL)
return TRUE;
/* Allocate relocation room. */
mdata->filelen = FILE_ALIGN(mdata->filelen, 2);
section->nreloc = sec->reloc_count;
sec->rel_filepos = mdata->filelen;
section->reloff = sec->rel_filepos;
mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0)
return FALSE;
/* Convert and write. */
entries = section->bfdsection->orelocation;
for (i = 0; i < section->nreloc; i++)
{
arelent *rel = entries[i];
char buf[8];
bfd_mach_o_reloc_info info, *pinfo = &info;
/* Convert relocation to an intermediate representation. */
if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo))
return FALSE;
/* Lower the relocation info. */
if (pinfo->r_scattered)
{
unsigned long v;
v = BFD_MACH_O_SR_SCATTERED
| (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0)
| BFD_MACH_O_SET_SR_LENGTH(pinfo->r_length)
| BFD_MACH_O_SET_SR_TYPE(pinfo->r_type)
| BFD_MACH_O_SET_SR_ADDRESS(pinfo->r_address);
bfd_put_32 (abfd, v, buf);
bfd_put_32 (abfd, pinfo->r_value, buf + 4);
}
else
{
unsigned long v;
bfd_put_32 (abfd, pinfo->r_address, buf);
v = BFD_MACH_O_SET_R_SYMBOLNUM (pinfo->r_value)
| (pinfo->r_pcrel ? BFD_MACH_O_R_PCREL : 0)
| BFD_MACH_O_SET_R_LENGTH (pinfo->r_length)
| (pinfo->r_extern ? BFD_MACH_O_R_EXTERN : 0)
| BFD_MACH_O_SET_R_TYPE (pinfo->r_type);
bfd_put_32 (abfd, v, buf + 4);
}
if (bfd_bwrite ((PTR) buf, BFD_MACH_O_RELENT_SIZE, abfd)
!= BFD_MACH_O_RELENT_SIZE)
return FALSE;
}
return TRUE;
}
static int
bfd_mach_o_scan_write_section_32 (bfd *abfd,
bfd_mach_o_section *section,
bfd_vma offset)
bfd_mach_o_scan_write_section_32 (bfd *abfd, bfd_mach_o_section *section)
{
unsigned char buf[BFD_MACH_O_SECTION_SIZE];
@ -548,18 +729,15 @@ bfd_mach_o_scan_write_section_32 (bfd *abfd,
bfd_h_put_32 (abfd, section->reserved1, buf + 60);
bfd_h_put_32 (abfd, section->reserved2, buf + 64);
if (bfd_seek (abfd, offset, SEEK_SET) != 0
|| (bfd_bwrite ((PTR) buf, BFD_MACH_O_SECTION_SIZE, abfd)
!= BFD_MACH_O_SECTION_SIZE))
if (bfd_bwrite ((PTR) buf, BFD_MACH_O_SECTION_SIZE, abfd)
!= BFD_MACH_O_SECTION_SIZE)
return -1;
return 0;
}
static int
bfd_mach_o_scan_write_section_64 (bfd *abfd,
bfd_mach_o_section *section,
bfd_vma offset)
bfd_mach_o_scan_write_section_64 (bfd *abfd, bfd_mach_o_section *section)
{
unsigned char buf[BFD_MACH_O_SECTION_64_SIZE];
@ -576,9 +754,8 @@ bfd_mach_o_scan_write_section_64 (bfd *abfd,
bfd_h_put_32 (abfd, section->reserved2, buf + 72);
bfd_h_put_32 (abfd, section->reserved3, buf + 76);
if (bfd_seek (abfd, offset, SEEK_SET) != 0
|| (bfd_bwrite ((PTR) buf, BFD_MACH_O_SECTION_64_SIZE, abfd)
!= BFD_MACH_O_SECTION_64_SIZE))
if (bfd_bwrite ((PTR) buf, BFD_MACH_O_SECTION_64_SIZE, abfd)
!= BFD_MACH_O_SECTION_64_SIZE)
return -1;
return 0;
@ -593,8 +770,11 @@ bfd_mach_o_scan_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
memcpy (buf, seg->segname, 16);
for (i = 0; i < seg->nsects; i++)
if (!bfd_mach_o_scan_write_relocs (abfd, &seg->sections[i]))
return -1;
memcpy (buf, seg->segname, 16);
bfd_h_put_32 (abfd, seg->vmaddr, buf + 16);
bfd_h_put_32 (abfd, seg->vmsize, buf + 20);
bfd_h_put_32 (abfd, seg->fileoff, buf + 24);
@ -605,18 +785,14 @@ bfd_mach_o_scan_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command)
bfd_h_put_32 (abfd, seg->flags, buf + 44);
if (bfd_seek (abfd, command->offset + 8, SEEK_SET) != 0
|| (bfd_bwrite ((PTR) buf, BFD_MACH_O_LC_SEGMENT_SIZE, abfd)
!= BFD_MACH_O_LC_SEGMENT_SIZE))
|| (bfd_bwrite ((PTR) buf, BFD_MACH_O_LC_SEGMENT_SIZE - 8, abfd)
!= BFD_MACH_O_LC_SEGMENT_SIZE - 8))
return -1;
for (i = 0; i < seg->nsects; i++)
{
bfd_vma segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE
+ (i * BFD_MACH_O_SECTION_SIZE);
if (bfd_mach_o_scan_write_section_32 (abfd, &seg->sections[i]))
return -1;
if (bfd_mach_o_scan_write_section_32 (abfd, &seg->sections[i], segoff))
return -1;
}
return 0;
}
@ -629,8 +805,11 @@ bfd_mach_o_scan_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64);
memcpy (buf, seg->segname, 16);
for (i = 0; i < seg->nsects; i++)
if (!bfd_mach_o_scan_write_relocs (abfd, &seg->sections[i]))
return -1;
memcpy (buf, seg->segname, 16);
bfd_h_put_64 (abfd, seg->vmaddr, buf + 16);
bfd_h_put_64 (abfd, seg->vmsize, buf + 24);
bfd_h_put_64 (abfd, seg->fileoff, buf + 32);
@ -641,24 +820,21 @@ bfd_mach_o_scan_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command)
bfd_h_put_32 (abfd, seg->flags, buf + 60);
if (bfd_seek (abfd, command->offset + 8, SEEK_SET) != 0
|| (bfd_bwrite ((PTR) buf, BFD_MACH_O_LC_SEGMENT_64_SIZE, abfd)
!= BFD_MACH_O_LC_SEGMENT_64_SIZE))
|| (bfd_bwrite ((PTR) buf, BFD_MACH_O_LC_SEGMENT_64_SIZE - 8, abfd)
!= BFD_MACH_O_LC_SEGMENT_64_SIZE - 8))
return -1;
for (i = 0; i < seg->nsects; i++)
{
bfd_vma segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE
+ (i * BFD_MACH_O_SECTION_64_SIZE);
if (bfd_mach_o_scan_write_section_64 (abfd, &seg->sections[i]))
return -1;
if (bfd_mach_o_scan_write_section_64 (abfd, &seg->sections[i], segoff))
return -1;
}
return 0;
}
static bfd_boolean
bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
{
bfd_mach_o_data_struct *mdata = bfd_get_mach_o_data (abfd);
bfd_mach_o_symtab_command *sym = &command->command.symtab;
unsigned char buf[16];
unsigned long i;
@ -670,10 +846,13 @@ bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
/* Write the symbols first. */
mdata->filelen = FILE_ALIGN(mdata->filelen, wide ? 3 : 2);
sym->symoff = mdata->filelen;
if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0)
return FALSE;
sym->nsyms = bfd_get_symcount (abfd);
mdata->filelen += sym->nsyms * symlen;
strtab = _bfd_stringtab_init ();
if (strtab == NULL)
@ -682,68 +861,34 @@ bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
for (i = 0; i < sym->nsyms; i++)
{
unsigned char buf[16];
unsigned char ntype;
unsigned char nsect;
short ndesc;
bfd_size_type index;
asymbol *s = symbols[i];
bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
/* Compute index. */
/* Compute name index. */
/* An index of 0 always means the empty string. */
if (s->name == 0 || s->name[0] == '\0')
if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
index = 0;
else
{
index = _bfd_stringtab_add (strtab, s->name, TRUE, FALSE);
index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
if (index == (bfd_size_type) -1)
goto err;
}
/* Get back-end specific values. */
ntype = BFD_MACH_O_SYM_NTYPE (s);
nsect = BFD_MACH_O_SYM_NSECT (s);
ndesc = BFD_MACH_O_SYM_NDESC (s);
if (ntype == BFD_MACH_O_N_UNDF && !(s->flags & BSF_DEBUGGING))
{
/* As genuine Mach-O symbols type shouldn't be N_UNDF (undefined
symbols should be N_UNDEF | N_EXT), we suppose the back-end
values haven't been set. */
if (s->flags & (BSF_LOCAL | BSF_GLOBAL))
{
if (s->section == bfd_abs_section_ptr)
ntype = BFD_MACH_O_N_ABS;
else if (s->section == bfd_und_section_ptr)
ntype = BFD_MACH_O_N_UNDF;
else if (s->section == bfd_com_section_ptr)
ntype = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
else
ntype = BFD_MACH_O_N_SECT;
ntype |= (s->flags & BSF_GLOBAL) ? BFD_MACH_O_N_EXT : 0;
}
}
/* Compute section index. */
if (s->section != bfd_abs_section_ptr
&& s->section != bfd_und_section_ptr
&& s->section != bfd_com_section_ptr)
nsect = s->section->target_index;
bfd_h_put_32 (abfd, index, buf);
bfd_h_put_8 (abfd, ntype, buf + 4);
bfd_h_put_8 (abfd, nsect, buf + 5);
bfd_h_put_16 (abfd, ndesc, buf + 6);
bfd_h_put_8 (abfd, s->n_type, buf + 4);
bfd_h_put_8 (abfd, s->n_sect, buf + 5);
bfd_h_put_16 (abfd, s->n_desc, buf + 6);
if (wide)
bfd_h_put_64 (abfd, s->section->vma + s->value, buf + 8);
bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value, buf + 8);
else
bfd_h_put_32 (abfd, s->section->vma + s->value, buf + 8);
bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value, buf + 8);
if (bfd_bwrite ((PTR) buf, symlen, abfd) != symlen)
goto err;
}
sym->strsize = _bfd_stringtab_size (strtab);
sym->stroff = sym->symoff + sym->nsyms * symlen;
sym->stroff = mdata->filelen;
mdata->filelen += sym->strsize;
if (_bfd_stringtab_emit (abfd, strtab) != TRUE)
goto err;
@ -766,12 +911,63 @@ bfd_mach_o_scan_write_symtab (bfd *abfd, bfd_mach_o_load_command *command)
return FALSE;
}
/* Process the symbols and generate Mach-O specific fields.
Number them. */
static bfd_boolean
bfd_mach_o_mangle_symbols (bfd *abfd)
{
unsigned long i;
asymbol **symbols = bfd_get_outsymbols (abfd);
for (i = 0; i < bfd_get_symcount (abfd); i++)
{
bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
if (s->n_type == BFD_MACH_O_N_UNDF && !(s->symbol.flags & BSF_DEBUGGING))
{
/* As genuine Mach-O symbols type shouldn't be N_UNDF (undefined
symbols should be N_UNDEF | N_EXT), we suppose the back-end
values haven't been set. */
if (s->symbol.section == bfd_abs_section_ptr)
s->n_type = BFD_MACH_O_N_ABS;
else if (s->symbol.section == bfd_und_section_ptr)
{
s->n_type = BFD_MACH_O_N_UNDF;
if (s->symbol.flags & BSF_WEAK)
s->n_desc |= BFD_MACH_O_N_WEAK_REF;
}
else if (s->symbol.section == bfd_com_section_ptr)
s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
else
s->n_type = BFD_MACH_O_N_SECT;
if (s->symbol.flags & BSF_GLOBAL)
s->n_type |= BFD_MACH_O_N_EXT;
}
/* Compute section index. */
if (s->symbol.section != bfd_abs_section_ptr
&& s->symbol.section != bfd_und_section_ptr
&& s->symbol.section != bfd_com_section_ptr)
s->n_sect = s->symbol.section->target_index;
/* Number symbols. */
s->symbol.udata.i = i;
}
return TRUE;
}
bfd_boolean
bfd_mach_o_write_contents (bfd *abfd)
{
unsigned int i;
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
if (mdata->header.ncmds == 0)
if (!bfd_mach_o_build_commands (abfd))
return FALSE;
/* Now write header information. */
if (mdata->header.filetype == 0)
{
@ -785,6 +981,10 @@ bfd_mach_o_write_contents (bfd *abfd)
if (!bfd_mach_o_write_header (abfd, &mdata->header))
return FALSE;
/* Assign a number to each symbols. */
if (!bfd_mach_o_mangle_symbols (abfd))
return FALSE;
for (i = 0; i < mdata->header.ncmds; i++)
{
unsigned char buf[8];
@ -857,7 +1057,6 @@ bfd_mach_o_build_commands (bfd *abfd)
bfd_mach_o_segment_command *seg;
bfd_mach_o_section *sections;
asection *sec;
file_ptr filepos;
bfd_mach_o_load_command *cmd;
bfd_mach_o_load_command *symtab_cmd;
int target_index;
@ -898,7 +1097,7 @@ bfd_mach_o_build_commands (bfd *abfd)
}
cmd->type_required = FALSE;
mdata->header.sizeofcmds = cmd->len;
filepos = cmd->offset + cmd->len;
mdata->filelen = cmd->offset + cmd->len;
/* Set symtab command. */
symtab_cmd = &mdata->commands[1];
@ -909,12 +1108,12 @@ bfd_mach_o_build_commands (bfd *abfd)
symtab_cmd->type_required = FALSE;
mdata->header.sizeofcmds += symtab_cmd->len;
filepos += symtab_cmd->len;
mdata->filelen += symtab_cmd->len;
/* Fill segment command. */
memset (seg->segname, 0, sizeof (seg->segname));
seg->vmaddr = 0;
seg->fileoff = filepos;
seg->fileoff = mdata->filelen;
seg->filesize = 0;
seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
| BFD_MACH_O_PROT_EXECUTE;
@ -931,30 +1130,28 @@ bfd_mach_o_build_commands (bfd *abfd)
sections->size = bfd_get_section_size (sec);
sections->align = bfd_get_section_alignment (abfd, sec);
filepos = (filepos + ((file_ptr) 1 << sections->align) - 1)
& ((file_ptr) -1 << sections->align);
sections->offset = filepos;
if (sections->size != 0)
{
mdata->filelen = FILE_ALIGN (mdata->filelen, sections->align);
sections->offset = mdata->filelen;
}
else
sections->offset = 0;
sections->reloff = 0;
sections->nreloc = 0;
sections->reserved1 = 0;
sections->reserved2 = 0;
sections->reserved3 = 0;
sec->filepos = filepos;
sec->filepos = sections->offset;
sec->target_index = ++target_index;
filepos += sections->size;
mdata->filelen += sections->size;
sections++;
}
seg->filesize = filepos - seg->fileoff;
seg->filesize = mdata->filelen - seg->fileoff;
seg->vmsize = seg->filesize;
/* Fill symtab command.
Note: we don't know the number of symbols.
Also, symtab is at the end since the length of the symbol table (and
string table) is not known. */
symtab_cmd->command.symtab.symoff = filepos;
return TRUE;
}
@ -1000,10 +1197,11 @@ bfd_mach_o_make_empty_symbol (bfd *abfd)
{
asymbol *new;
new = bfd_zalloc (abfd, sizeof (* new));
new = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol));
if (new == NULL)
return new;
new->the_bfd = abfd;
new->udata.i = 0;
return new;
}
@ -1103,6 +1301,9 @@ bfd_mach_o_make_bfd_section (bfd *abfd, bfd_mach_o_section *section,
flags |= SEC_READONLY;
}
}
if (section->nreloc != 0)
flags |= SEC_RELOC;
bfdsec = bfd_make_section_anyway_with_flags (abfd, sname, flags);
if (bfdsec == NULL)
return NULL;
@ -1113,6 +1314,8 @@ bfd_mach_o_make_bfd_section (bfd *abfd, bfd_mach_o_section *section,
bfdsec->filepos = section->offset;
bfdsec->alignment_power = section->align;
bfdsec->segment_mark = 0;
bfdsec->reloc_count = section->nreloc;
bfdsec->rel_filepos = section->reloff;
return bfdsec;
}
@ -1120,7 +1323,7 @@ bfd_mach_o_make_bfd_section (bfd *abfd, bfd_mach_o_section *section,
static int
bfd_mach_o_scan_read_section_32 (bfd *abfd,
bfd_mach_o_section *section,
bfd_vma offset,
unsigned int offset,
unsigned long prot)
{
unsigned char buf[BFD_MACH_O_SECTION_SIZE];
@ -1155,7 +1358,7 @@ bfd_mach_o_scan_read_section_32 (bfd *abfd,
static int
bfd_mach_o_scan_read_section_64 (bfd *abfd,
bfd_mach_o_section *section,
bfd_vma offset,
unsigned int offset,
unsigned long prot)
{
unsigned char buf[BFD_MACH_O_SECTION_64_SIZE];
@ -1190,7 +1393,7 @@ bfd_mach_o_scan_read_section_64 (bfd *abfd,
static int
bfd_mach_o_scan_read_section (bfd *abfd,
bfd_mach_o_section *section,
bfd_vma offset,
unsigned int offset,
unsigned long prot,
unsigned int wide)
{
@ -1203,13 +1406,13 @@ bfd_mach_o_scan_read_section (bfd *abfd,
int
bfd_mach_o_scan_read_symtab_symbol (bfd *abfd,
bfd_mach_o_symtab_command *sym,
asymbol *s,
bfd_mach_o_asymbol *s,
unsigned long i)
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
unsigned int wide = mach_o_wide_p (&mdata->header);
unsigned int symwidth = wide ? 16 : 12;
bfd_vma symoff = sym->symoff + (i * symwidth);
unsigned int symoff = sym->symoff + (i * symwidth);
unsigned char buf[16];
unsigned char type = -1;
unsigned char section = -1;
@ -1245,16 +1448,19 @@ bfd_mach_o_scan_read_symtab_symbol (bfd *abfd,
return -1;
}
s->the_bfd = abfd;
s->name = sym->strtab + stroff;
s->value = value;
s->udata.i = (type << 24) | (section << 16) | desc;
s->flags = 0x0;
s->symbol.the_bfd = abfd;
s->symbol.name = sym->strtab + stroff;
s->symbol.value = value;
s->symbol.flags = 0x0;
s->symbol.udata.i = 0;
s->n_type = type;
s->n_sect = section;
s->n_desc = desc;
if (type & BFD_MACH_O_N_STAB)
{
s->flags |= BSF_DEBUGGING;
s->section = bfd_und_section_ptr;
s->symbol.flags |= BSF_DEBUGGING;
s->symbol.section = bfd_und_section_ptr;
switch (type)
{
case N_FUN:
@ -1268,8 +1474,9 @@ bfd_mach_o_scan_read_symtab_symbol (bfd *abfd,
case N_GSYM:
if ((section > 0) && (section <= mdata->nsects))
{
s->section = mdata->sections[section - 1]->bfdsection;
s->value = s->value - mdata->sections[section - 1]->addr;
s->symbol.section = mdata->sections[section - 1]->bfdsection;
s->symbol.value =
s->symbol.value - mdata->sections[section - 1]->addr;
}
break;
}
@ -1277,38 +1484,43 @@ bfd_mach_o_scan_read_symtab_symbol (bfd *abfd,
else
{
if (type & BFD_MACH_O_N_PEXT)
s->flags |= BSF_GLOBAL;
s->symbol.flags |= BSF_GLOBAL;
if (type & BFD_MACH_O_N_EXT)
s->flags |= BSF_GLOBAL;
s->symbol.flags |= BSF_GLOBAL;
if (!(type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)))
s->flags |= BSF_LOCAL;
s->symbol.flags |= BSF_LOCAL;
switch (symtype)
{
case BFD_MACH_O_N_UNDF:
if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT)
&& s->value != 0)
&& s->symbol.value != 0)
{
/* A common symbol. */
s->section = bfd_com_section_ptr;
s->flags = BSF_NO_FLAGS;
s->symbol.section = bfd_com_section_ptr;
s->symbol.flags = BSF_NO_FLAGS;
}
else
s->section = bfd_und_section_ptr;
{
s->symbol.section = bfd_und_section_ptr;
if (s->n_desc & BFD_MACH_O_N_WEAK_REF)
s->symbol.flags |= BSF_WEAK;
}
break;
case BFD_MACH_O_N_PBUD:
s->section = bfd_und_section_ptr;
s->symbol.section = bfd_und_section_ptr;
break;
case BFD_MACH_O_N_ABS:
s->section = bfd_abs_section_ptr;
s->symbol.section = bfd_abs_section_ptr;
break;
case BFD_MACH_O_N_SECT:
if ((section > 0) && (section <= mdata->nsects))
{
s->section = mdata->sections[section - 1]->bfdsection;
s->value = s->value - mdata->sections[section - 1]->addr;
s->symbol.section = mdata->sections[section - 1]->bfdsection;
s->symbol.value =
s->symbol.value - mdata->sections[section - 1]->addr;
}
else
{
@ -1317,22 +1529,22 @@ bfd_mach_o_scan_read_symtab_symbol (bfd *abfd,
{
fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: "
"symbol \"%s\" specified invalid section %d (max %lu): setting to undefined\n",
s->name, section, mdata->nsects);
s->symbol.name, section, mdata->nsects);
}
s->section = bfd_und_section_ptr;
s->symbol.section = bfd_und_section_ptr;
}
break;
case BFD_MACH_O_N_INDR:
fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: "
"symbol \"%s\" is unsupported 'indirect' reference: setting to undefined\n",
s->name);
s->section = bfd_und_section_ptr;
s->symbol.name);
s->symbol.section = bfd_und_section_ptr;
break;
default:
fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: "
"symbol \"%s\" specified invalid type field 0x%x: setting to undefined\n",
s->name, symtype);
s->section = bfd_und_section_ptr;
s->symbol.name, symtype);
s->symbol.section = bfd_und_section_ptr;
break;
}
}
@ -1368,8 +1580,7 @@ bfd_mach_o_scan_read_symtab_strtab (bfd *abfd,
if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0
|| bfd_bread ((PTR) sym->strtab, sym->strsize, abfd) != sym->strsize)
{
fprintf (stderr, "bfd_mach_o_scan_read_symtab_strtab: unable to read %lu bytes at %lu\n",
sym->strsize, sym->stroff);
bfd_set_error (bfd_error_file_truncated);
return -1;
}
@ -1384,7 +1595,7 @@ bfd_mach_o_scan_read_symtab_symbols (bfd *abfd,
int ret;
BFD_ASSERT (sym->symbols == NULL);
sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (asymbol));
sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol));
if (sym->symbols == NULL)
{
@ -1410,7 +1621,7 @@ int
bfd_mach_o_scan_read_dysymtab_symbol (bfd *abfd,
bfd_mach_o_dysymtab_command *dysym,
bfd_mach_o_symtab_command *sym,
asymbol *s,
bfd_mach_o_asymbol *s,
unsigned long i)
{
unsigned long isymoff = dysym->indirectsymoff + (i * 4);
@ -1587,7 +1798,7 @@ bfd_mach_o_scan_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
bfd_mach_o_data_struct *mdata = NULL;
bfd_mach_o_thread_command *cmd = &command->command.thread;
unsigned char buf[8];
bfd_vma offset;
unsigned int offset;
unsigned int nflavours;
unsigned int i;
@ -2088,7 +2299,6 @@ bfd_mach_o_scan (bfd *abfd,
BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE;
mdata->header = *header;
mdata->symbols = NULL;
abfd->flags = abfd->flags & BFD_IN_MEMORY;
switch (header->filetype)
@ -2167,11 +2377,8 @@ bfd_mach_o_mkobject_init (bfd *abfd)
mdata->header.flags = 0;
mdata->header.byteorder = BFD_ENDIAN_UNKNOWN;
mdata->commands = NULL;
mdata->nsymbols = 0;
mdata->symbols = NULL;
mdata->nsects = 0;
mdata->sections = NULL;
mdata->ibfd = NULL;
return TRUE;
}
@ -2685,7 +2892,7 @@ bfd_mach_o_bfd_print_private_bfd_data (bfd *abfd, PTR ptr)
{
bfd_mach_o_symtab_command *symtab = &cmd->command.symtab;
fprintf (file, "\n"
"LC_SYMTAB: nsyms: %lu, strsize: %lu\n",
"LC_SYMTAB: nsyms: %u, strsize: %u\n",
symtab->nsyms, symtab->strsize);
break;
}
@ -2831,11 +3038,16 @@ bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED)
return 0;
}
#define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
#define bfd_mach_o_swap_reloc_in NULL
#define bfd_mach_o_swap_reloc_out NULL
#define TARGET_NAME mach_o_be_vec
#define TARGET_STRING "mach-o-be"
#define TARGET_BIG_ENDIAN 1
#define TARGET_ARCHIVE 0
#include "mach-o-target.c"
#undef TARGET_NAME

167
bfd/mach-o.h
View File

@ -24,6 +24,7 @@
#include "bfd.h"
/* Symbol n_type values. */
#define BFD_MACH_O_N_STAB 0xe0 /* If any of these bits set, a symbolic debugging entry. */
#define BFD_MACH_O_N_PEXT 0x10 /* Private external symbol bit. */
#define BFD_MACH_O_N_TYPE 0x0e /* Mask for the type bits. */
@ -34,11 +35,20 @@
#define BFD_MACH_O_N_PBUD 0x0c /* Prebound undefined (defined in a dylib). */
#define BFD_MACH_O_N_SECT 0x0e /* Defined in section number n_sect. */
#define BFD_MACH_O_NO_SECT 0
#define BFD_MACH_O_NO_SECT 0 /* Symbol not in any section of the image. */
#define BFD_MACH_O_SYM_NTYPE(SYM) (((SYM)->udata.i >> 24) & 0xff)
#define BFD_MACH_O_SYM_NSECT(SYM) (((SYM)->udata.i >> 16) & 0xff)
#define BFD_MACH_O_SYM_NDESC(SYM) ((SYM)->udata.i & 0xffff)
/* Symbol n_desc flags. */
#define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_NON_LAZY 0x00
#define BFD_MACH_O_REFERENCE_FLAG_UNDEFINED_LAZY 0x01
#define BFD_MACH_O_REFERENCE_FLAG_DEFINED 0x02
#define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_DEFINED 0x03
#define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY 0x04
#define BFD_MACH_O_REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY 0x05
#define BFD_MACH_O_REFERENCED_DYNAMICALLY 0x10
#define BFD_MACH_O_N_DESC_DISCARDED 0x20
#define BFD_MACH_O_N_NO_DEAD_STRIP 0x20
#define BFD_MACH_O_N_WEAK_REF 0x40
#define BFD_MACH_O_N_WEAK_DEF 0x80
typedef enum bfd_mach_o_mach_header_magic
{
@ -203,11 +213,33 @@ typedef enum bfd_mach_o_section_type
/* Section with only lazy symbol pointers. */
BFD_MACH_O_S_LAZY_SYMBOL_POINTERS = 0x7,
/* Section with only symbol stubs, byte size of stub in the reserved2 field. */
/* Section with only symbol stubs, byte size of stub in the reserved2
field. */
BFD_MACH_O_S_SYMBOL_STUBS = 0x8,
/* Section with only function pointers for initialization. */
BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9
BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS = 0x9,
/* Section with only function pointers for termination. */
BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS = 0xa,
/* Section contains symbols that are coalesced by the linkers. */
BFD_MACH_O_S_COALESCED = 0xb,
/* Zero fill on demand section (possibly larger than 4 GB). */
BFD_MACH_O_S_GB_ZEROFILL = 0xc,
/* Section with only pairs of function pointers for interposing. */
BFD_MACH_O_S_INTERPOSING = 0xd,
/* Section with only 16 byte literals. */
BFD_MACH_O_S_16BYTE_LITERALS = 0xe,
/* Section contains DTrace Object Format. */
BFD_MACH_O_S_DTRACE_DOF = 0xf,
/* Section with only lazy symbol pointers to lazy loaded dylibs. */
BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS = 0x10
}
bfd_mach_o_section_type;
@ -233,10 +265,27 @@ bfd_mach_o_section_type;
#define BFD_MACH_O_S_ATTR_EXT_RELOC 0x00000200
/* Section contains some machine instructions. */
#define BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS 0x00004000
#define BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS 0x00000400
/* A debug section. */
#define BFD_MACH_O_S_ATTR_DEBUG 0x02000000
/* Used with i386 stubs. */
#define BFD_MACH_O_S_SELF_MODIFYING_CODE 0x04000000
/* Blocks are live if they reference live blocks. */
#define BFD_MACH_O_S_ATTR_LIVE_SUPPORT 0x08000000
/* No dead stripping. */
#define BFD_MACH_O_S_ATTR_NO_DEAD_STRIP 0x10000000
/* Section symbols can be stripped in files with MH_DYLDLINK flag. */
#define BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS 0x20000000
/* Section contains coalesced symbols that are not to be in the TOC of an
archive. */
#define BFD_MACH_O_S_ATTR_NO_TOC 0x40000000
/* Section contains only true machine instructions. */
#define BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS 0x80000000
@ -302,13 +351,68 @@ bfd_mach_o_segment_command;
#define BFD_MACH_O_PROT_WRITE 0x02
#define BFD_MACH_O_PROT_EXECUTE 0x04
/* Generic relocation types (used by i386). */
#define BFD_MACH_O_GENERIC_RELOC_VANILLA 0
#define BFD_MACH_O_GENERIC_RELOC_PAIR 1
#define BFD_MACH_O_GENERIC_RELOC_SECTDIFF 2
#define BFD_MACH_O_GENERIC_RELOC_PB_LA_PTR 3
#define BFD_MACH_O_GENERIC_RELOC_LOCAL_SECTDIFF 4
/* Size of a relocation entry. */
#define BFD_MACH_O_RELENT_SIZE 8
/* Fields for a normal (non-scattered) entry. */
#define BFD_MACH_O_R_PCREL 0x01000000
#define BFD_MACH_O_GET_R_LENGTH(s) (((s) >> 25) & 0x3)
#define BFD_MACH_O_R_EXTERN 0x08000000
#define BFD_MACH_O_GET_R_TYPE(s) (((s) >> 28) & 0x0f)
#define BFD_MACH_O_GET_R_SYMBOLNUM(s) ((s) & 0x00ffffff)
#define BFD_MACH_O_SET_R_LENGTH(l) (((l) & 0x3) << 25)
#define BFD_MACH_O_SET_R_TYPE(t) (((t) & 0xf) << 28)
#define BFD_MACH_O_SET_R_SYMBOLNUM(s) ((s) & 0x00ffffff)
/* Fields for a scattered entry. */
#define BFD_MACH_O_SR_SCATTERED 0x80000000
#define BFD_MACH_O_SR_PCREL 0x40000000
#define BFD_MACH_O_GET_SR_LENGTH(s) (((s) >> 28) & 0x3)
#define BFD_MACH_O_GET_SR_TYPE(s) (((s) >> 24) & 0x0f)
#define BFD_MACH_O_GET_SR_ADDRESS(s) ((s) & 0x00ffffff)
#define BFD_MACH_O_SET_SR_LENGTH(l) (((l) & 0x3) << 28)
#define BFD_MACH_O_SET_SR_TYPE(t) (((t) & 0xf) << 24)
#define BFD_MACH_O_SET_SR_ADDRESS(s) ((s) & 0x00ffffff)
/* Expanded internal representation of a relocation entry. */
typedef struct bfd_mach_o_reloc_info
{
bfd_vma r_address;
bfd_vma r_value;
unsigned int r_scattered : 1;
unsigned int r_type : 4;
unsigned int r_pcrel : 1;
unsigned int r_length : 2;
unsigned int r_extern : 1;
}
bfd_mach_o_reloc_info;
typedef struct bfd_mach_o_asymbol
{
/* The actual symbol which the rest of BFD works with. */
asymbol symbol;
/* Fields from Mach-O symbol. */
unsigned char n_type;
unsigned char n_sect;
unsigned short n_desc;
}
bfd_mach_o_asymbol;
typedef struct bfd_mach_o_symtab_command
{
unsigned long symoff;
unsigned long nsyms;
unsigned long stroff;
unsigned long strsize;
asymbol *symbols;
unsigned int symoff;
unsigned int nsyms;
unsigned int stroff;
unsigned int strsize;
bfd_mach_o_asymbol *symbols;
char *strtab;
}
bfd_mach_o_symtab_command;
@ -525,8 +629,8 @@ typedef struct bfd_mach_o_load_command
{
bfd_mach_o_load_command_type type;
bfd_boolean type_required;
bfd_vma offset;
bfd_vma len;
unsigned int offset;
unsigned int len;
union
{
bfd_mach_o_segment_command segment;
@ -544,25 +648,40 @@ bfd_mach_o_load_command;
typedef struct mach_o_data_struct
{
/* Mach-O header. */
bfd_mach_o_header header;
/* Array of load commands (length is given by header.ncmds). */
bfd_mach_o_load_command *commands;
unsigned long nsymbols;
asymbol *symbols;
/* Flatten array of sections. The array is 0-based. */
unsigned long nsects;
bfd_mach_o_section **sections;
bfd *ibfd;
/* Used while writting: current length of the output file. This is used
to allocate space in the file. */
ufile_ptr filelen;
}
mach_o_data_struct;
#define bfd_get_mach_o_data(abfd) ((abfd)->tdata.mach_o_data)
typedef struct mach_o_data_struct bfd_mach_o_data_struct;
/* Target specific routines. */
typedef struct bfd_mach_o_backend_data
{
bfd_boolean (*_bfd_mach_o_swap_reloc_in)(arelent *, bfd_mach_o_reloc_info *);
bfd_boolean (*_bfd_mach_o_swap_reloc_out)(arelent *, bfd_mach_o_reloc_info *);
}
bfd_mach_o_backend_data;
#define bfd_get_mach_o_data(abfd) ((abfd)->tdata.mach_o_data)
#define bfd_mach_o_get_backend_data(abfd) \
((bfd_mach_o_backend_data*)(abfd)->xvec->backend_data)
bfd_boolean bfd_mach_o_valid (bfd *);
int bfd_mach_o_scan_read_symtab_symbol (bfd *, bfd_mach_o_symtab_command *, asymbol *, unsigned long);
int bfd_mach_o_scan_read_symtab_symbol (bfd *, bfd_mach_o_symtab_command *,
bfd_mach_o_asymbol *, unsigned long);
int bfd_mach_o_scan_read_symtab_strtab (bfd *, bfd_mach_o_symtab_command *);
int bfd_mach_o_scan_read_symtab_symbols (bfd *, bfd_mach_o_symtab_command *);
int bfd_mach_o_scan_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, asymbol *, unsigned long);
int bfd_mach_o_scan_read_dysymtab_symbol (bfd *, bfd_mach_o_dysymtab_command *, bfd_mach_o_symtab_command *, bfd_mach_o_asymbol *, unsigned long);
int bfd_mach_o_scan_start_address (bfd *);
int bfd_mach_o_scan (bfd *, bfd_mach_o_header *, bfd_mach_o_data_struct *);
bfd_boolean bfd_mach_o_mkobject_init (bfd *);
@ -580,6 +699,10 @@ bfd_boolean bfd_mach_o_bfd_copy_private_section_data (bfd *, asection *,
bfd_boolean bfd_mach_o_bfd_copy_private_bfd_data (bfd *, bfd *);
long bfd_mach_o_get_symtab_upper_bound (bfd *);
long bfd_mach_o_canonicalize_symtab (bfd *, asymbol **);
long bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
asection *asect);
long bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect,
arelent **rels, asymbol **syms);
asymbol *bfd_mach_o_make_empty_symbol (bfd *);
void bfd_mach_o_get_symbol_info (bfd *, asymbol *, symbol_info *);
void bfd_mach_o_print_symbol (bfd *, PTR, asymbol *, bfd_print_symbol_type);

10
bfd/reloc.c
View File

@ -5180,6 +5180,16 @@ ENUMX
BFD_RELOC_LM32_RELATIVE
ENUMDOC
Lattice Mico32 relocations.
ENUM
BFD_RELOC_MACH_O_SECTDIFF
ENUMDOC
Difference between two section addreses. Must be followed by a
BFD_RELOC_MACH_O_PAIR.
ENUM
BFD_RELOC_MACH_O_PAIR
ENUMDOC
Mach-O generic relocations.
ENDSENUM
BFD_RELOC_UNUSED