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binutils-gdb/bfd/mach-o.c
Nick Clifton 3af9a47b1c Add support for PEF, Mach-O, xSYM
2002-11-06 13:26:29 +00:00

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/* Mach-O support for BFD.
Copyright 1999, 2000, 2001, 2002
Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "mach-o.h"
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "libiberty.h"
#include <ctype.h>
#ifndef BFD_IO_FUNCS
#define BFD_IO_FUNCS 0
#endif
#define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
#define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr
#define bfd_mach_o_slurp_armap _bfd_noarchive_slurp_armap
#define bfd_mach_o_slurp_extended_name_table _bfd_noarchive_slurp_extended_name_table
#define bfd_mach_o_construct_extended_name_table _bfd_noarchive_construct_extended_name_table
#define bfd_mach_o_truncate_arname _bfd_noarchive_truncate_arname
#define bfd_mach_o_write_armap _bfd_noarchive_write_armap
#define bfd_mach_o_get_elt_at_index _bfd_noarchive_get_elt_at_index
#define bfd_mach_o_generic_stat_arch_elt _bfd_noarchive_generic_stat_arch_elt
#define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
#define bfd_mach_o_close_and_cleanup _bfd_generic_close_and_cleanup
#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_get_lineno _bfd_nosymbols_get_lineno
#define bfd_mach_o_find_nearest_line _bfd_nosymbols_find_nearest_line
#define bfd_mach_o_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define bfd_mach_o_read_minisymbols _bfd_generic_read_minisymbols
#define bfd_mach_o_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
#define bfd_mach_o_get_reloc_upper_bound _bfd_norelocs_get_reloc_upper_bound
#define bfd_mach_o_canonicalize_reloc _bfd_norelocs_canonicalize_reloc
#define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
#define bfd_mach_o_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
#define bfd_mach_o_bfd_relax_section bfd_generic_relax_section
#define bfd_mach_o_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define bfd_mach_o_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
#define bfd_mach_o_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define bfd_mach_o_bfd_link_just_syms _bfd_generic_link_just_syms
#define bfd_mach_o_bfd_final_link _bfd_generic_final_link
#define bfd_mach_o_bfd_link_split_section _bfd_generic_link_split_section
#define bfd_mach_o_set_arch_mach bfd_default_set_arch_mach
#define bfd_mach_o_bfd_merge_private_bfd_data _bfd_generic_bfd_merge_private_bfd_data
#define bfd_mach_o_bfd_set_private_flags _bfd_generic_bfd_set_private_flags
#define bfd_mach_o_bfd_print_private_bfd_data _bfd_generic_bfd_print_private_bfd_data
#define bfd_mach_o_get_section_contents _bfd_generic_get_section_contents
#define bfd_mach_o_set_section_contents _bfd_generic_set_section_contents
#define bfd_mach_o_bfd_gc_sections bfd_generic_gc_sections
#define bfd_mach_o_bfd_merge_sections bfd_generic_merge_sections
#define bfd_mach_o_bfd_discard_group bfd_generic_discard_group
static boolean bfd_mach_o_bfd_copy_private_symbol_data PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
static boolean bfd_mach_o_bfd_copy_private_section_data PARAMS ((bfd *, asection *, bfd *, asection *));
static boolean bfd_mach_o_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *));
static long bfd_mach_o_count_symbols PARAMS ((bfd *));
static long bfd_mach_o_get_symtab_upper_bound PARAMS ((bfd *));
static long bfd_mach_o_get_symtab PARAMS ((bfd *, asymbol **));
static void bfd_mach_o_get_symbol_info PARAMS ((bfd *, asymbol *, symbol_info *));
static void bfd_mach_o_print_symbol PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
static void bfd_mach_o_convert_architecture PARAMS ((bfd_mach_o_cpu_type, bfd_mach_o_cpu_subtype, enum bfd_architecture *, unsigned long *));
static boolean bfd_mach_o_write_contents PARAMS ((bfd *));
static int bfd_mach_o_sizeof_headers PARAMS ((bfd *, boolean));
static asymbol * bfd_mach_o_make_empty_symbol PARAMS ((bfd *));
static int bfd_mach_o_write_header PARAMS ((bfd *, bfd_mach_o_header *));
static int bfd_mach_o_read_header PARAMS ((bfd *, bfd_mach_o_header *));
static asection * bfd_mach_o_make_bfd_section PARAMS ((bfd *, bfd_mach_o_section *));
static int bfd_mach_o_scan_read_section PARAMS ((bfd *, bfd_mach_o_section *, bfd_vma));
static int bfd_mach_o_scan_write_section PARAMS ((bfd *, bfd_mach_o_section *, bfd_vma));
static int bfd_mach_o_scan_write_symtab_symbols PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_write_thread PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_dylinker PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_dylib PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_prebound_dylib PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_thread PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_write_symtab PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_dysymtab PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_symtab PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_segment PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_write_segment PARAMS ((bfd *, bfd_mach_o_load_command *));
static int bfd_mach_o_scan_read_command PARAMS ((bfd *, bfd_mach_o_load_command *));
static void bfd_mach_o_flatten_sections PARAMS ((bfd *));
static const char * bfd_mach_o_i386_flavour_string PARAMS ((unsigned int));
static const char * bfd_mach_o_ppc_flavour_string PARAMS ((unsigned int));
/* The flags field of a section structure is separated into two parts a section
type and section attributes. The section types are mutually exclusive (it
can only have one type) but the section attributes are not (it may have more
than one attribute). */
#define SECTION_TYPE 0x000000ff /* 256 section types. */
#define SECTION_ATTRIBUTES 0xffffff00 /* 24 section attributes. */
/* Constants for the section attributes part of the flags field of a section
structure. */
#define SECTION_ATTRIBUTES_USR 0xff000000 /* User-settable attributes. */
#define S_ATTR_PURE_INSTRUCTIONS 0x80000000 /* Section contains only true machine instructions. */
#define SECTION_ATTRIBUTES_SYS 0x00ffff00 /* System setable attributes. */
#define S_ATTR_SOME_INSTRUCTIONS 0x00000400 /* Section contains some machine instructions. */
#define S_ATTR_EXT_RELOC 0x00000200 /* Section has external relocation entries. */
#define S_ATTR_LOC_RELOC 0x00000100 /* Section has local relocation entries. */
#define N_STAB 0xe0
#define N_TYPE 0x1e
#define N_EXT 0x01
#define N_UNDF 0x0
#define N_ABS 0x2
#define N_SECT 0xe
#define N_INDR 0xa
boolean
bfd_mach_o_valid (abfd)
bfd *abfd;
{
if (abfd == NULL || abfd->xvec == NULL)
return 0;
if (! ((abfd->xvec == &mach_o_be_vec)
|| (abfd->xvec == &mach_o_le_vec)
|| (abfd->xvec == &mach_o_fat_vec)))
return 0;
if (abfd->tdata.mach_o_data == NULL)
return 0;
return 1;
}
/* Copy any private info we understand from the input symbol
to the output symbol. */
static boolean
bfd_mach_o_bfd_copy_private_symbol_data (ibfd, isymbol, obfd, osymbol)
bfd *ibfd ATTRIBUTE_UNUSED;
asymbol *isymbol ATTRIBUTE_UNUSED;
bfd *obfd ATTRIBUTE_UNUSED;
asymbol *osymbol ATTRIBUTE_UNUSED;
{
return true;
}
/* Copy any private info we understand from the input section
to the output section. */
static boolean
bfd_mach_o_bfd_copy_private_section_data (ibfd, isection, obfd, osection)
bfd *ibfd ATTRIBUTE_UNUSED;
asection *isection ATTRIBUTE_UNUSED;
bfd *obfd ATTRIBUTE_UNUSED;
asection *osection ATTRIBUTE_UNUSED;
{
return true;
}
/* Copy any private info we understand from the input bfd
to the output bfd. */
static boolean
bfd_mach_o_bfd_copy_private_bfd_data (ibfd, obfd)
bfd *ibfd;
bfd *obfd;
{
BFD_ASSERT (bfd_mach_o_valid (ibfd));
BFD_ASSERT (bfd_mach_o_valid (obfd));
obfd->tdata.mach_o_data = ibfd->tdata.mach_o_data;
obfd->tdata.mach_o_data->ibfd = ibfd;
return true;
}
static long
bfd_mach_o_count_symbols (abfd)
bfd *abfd;
{
bfd_mach_o_data_struct *mdata = NULL;
long nsyms = 0;
unsigned long i;
BFD_ASSERT (bfd_mach_o_valid (abfd));
mdata = abfd->tdata.mach_o_data;
for (i = 0; i < mdata->header.ncmds; i++)
if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB)
{
bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab;
nsyms += sym->nsyms;
}
return nsyms;
}
static long
bfd_mach_o_get_symtab_upper_bound (abfd)
bfd *abfd;
{
long nsyms = bfd_mach_o_count_symbols (abfd);
if (nsyms < 0)
return nsyms;
return ((nsyms + 1) * sizeof (asymbol *));
}
static long
bfd_mach_o_get_symtab (abfd, alocation)
bfd *abfd;
asymbol **alocation;
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
long nsyms = bfd_mach_o_count_symbols (abfd);
asymbol **csym = alocation;
unsigned long i, j;
if (nsyms < 0)
return nsyms;
for (i = 0; i < mdata->header.ncmds; i++)
{
if (mdata->commands[i].type == BFD_MACH_O_LC_SYMTAB)
{
bfd_mach_o_symtab_command *sym = &mdata->commands[i].command.symtab;
if (bfd_mach_o_scan_read_symtab_symbols (abfd, &mdata->commands[i].command.symtab) != 0)
{
fprintf (stderr, "bfd_mach_o_get_symtab: unable to load symbols for section %lu\n", i);
return 0;
}
BFD_ASSERT (sym->symbols != NULL);
for (j = 0; j < sym->nsyms; j++)
{
BFD_ASSERT (csym < (alocation + nsyms));
*csym++ = &sym->symbols[j];
}
}
}
*csym++ = NULL;
return nsyms;
}
static void
bfd_mach_o_get_symbol_info (abfd, symbol, ret)
bfd *abfd ATTRIBUTE_UNUSED;
asymbol *symbol;
symbol_info *ret;
{
bfd_symbol_info (symbol, ret);
}
static void
bfd_mach_o_print_symbol (abfd, afile, symbol, how)
bfd *abfd;
PTR afile;
asymbol *symbol;
bfd_print_symbol_type how;
{
FILE *file = (FILE *) afile;
switch (how)
{
case bfd_print_symbol_name:
fprintf (file, "%s", symbol->name);
break;
default:
bfd_print_symbol_vandf (abfd, (PTR) file, symbol);
fprintf (file, " %-5s %s", symbol->section->name, symbol->name);
}
}
static void
bfd_mach_o_convert_architecture (mtype, msubtype, type, subtype)
bfd_mach_o_cpu_type mtype;
bfd_mach_o_cpu_subtype msubtype ATTRIBUTE_UNUSED;
enum bfd_architecture *type;
unsigned long *subtype;
{
*subtype = bfd_arch_unknown;
switch (mtype)
{
case BFD_MACH_O_CPU_TYPE_VAX: *type = bfd_arch_vax; break;
case BFD_MACH_O_CPU_TYPE_MC680x0: *type = bfd_arch_m68k; break;
case BFD_MACH_O_CPU_TYPE_I386: *type = bfd_arch_i386; break;
case BFD_MACH_O_CPU_TYPE_MIPS: *type = bfd_arch_mips; break;
case BFD_MACH_O_CPU_TYPE_MC98000: *type = bfd_arch_m98k; break;
case BFD_MACH_O_CPU_TYPE_HPPA: *type = bfd_arch_hppa; break;
case BFD_MACH_O_CPU_TYPE_ARM: *type = bfd_arch_arm; break;
case BFD_MACH_O_CPU_TYPE_MC88000: *type = bfd_arch_m88k; break;
case BFD_MACH_O_CPU_TYPE_SPARC: *type = bfd_arch_sparc; break;
case BFD_MACH_O_CPU_TYPE_I860: *type = bfd_arch_i860; break;
case BFD_MACH_O_CPU_TYPE_ALPHA: *type = bfd_arch_alpha; break;
case BFD_MACH_O_CPU_TYPE_POWERPC: *type = bfd_arch_powerpc; break;
default: *type = bfd_arch_unknown; break;
}
switch (*type)
{
case bfd_arch_i386: *subtype = bfd_mach_i386_i386; break;
case bfd_arch_sparc: *subtype = bfd_mach_sparc; break;
default:
*subtype = bfd_arch_unknown;
}
}
static boolean
bfd_mach_o_write_contents (abfd)
bfd *abfd;
{
unsigned int i;
asection *s;
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
/* Write data sections first in case they overlap header data to be
written later. */
for (s = abfd->sections; s != (asection *) NULL; s = s->next)
;
#if 0
for (i = 0; i < mdata->header.ncmds; i++)
{
bfd_mach_o_load_command *cur = &mdata->commands[i];
if (cur->type != BFD_MACH_O_LC_SEGMENT)
break;
{
bfd_mach_o_segment_command *seg = &cur->command.segment;
char buf[1024];
bfd_vma nbytes = seg->filesize;
bfd_vma curoff = seg->fileoff;
while (nbytes > 0)
{
bfd_vma thisread = nbytes;
if (thisread > 1024)
thisread = 1024;
bfd_seek (abfd, curoff, SEEK_SET);
if (bfd_bread ((PTR) buf, thisread, abfd) != thisread)
return false;
bfd_seek (abfd, curoff, SEEK_SET);
if (bfd_bwrite ((PTR) buf, thisread, abfd) != thisread)
return false;
nbytes -= thisread;
curoff += thisread;
}
}
}
#endif
/* Now write header information. */
if (bfd_mach_o_write_header (abfd, &mdata->header) != 0)
return false;
for (i = 0; i < mdata->header.ncmds; i++)
{
unsigned char buf[8];
bfd_mach_o_load_command *cur = &mdata->commands[i];
unsigned long typeflag;
typeflag = cur->type_required ? cur->type & BFD_MACH_O_LC_REQ_DYLD : cur->type;
bfd_h_put_32 (abfd, typeflag, buf);
bfd_h_put_32 (abfd, cur->len, buf + 4);
bfd_seek (abfd, cur->offset, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 8, abfd) != 8)
return false;
switch (cur->type)
{
case BFD_MACH_O_LC_SEGMENT:
if (bfd_mach_o_scan_write_segment (abfd, cur) != 0)
return false;
break;
case BFD_MACH_O_LC_SYMTAB:
if (bfd_mach_o_scan_write_symtab (abfd, cur) != 0)
return false;
break;
case BFD_MACH_O_LC_SYMSEG:
break;
case BFD_MACH_O_LC_THREAD:
case BFD_MACH_O_LC_UNIXTHREAD:
if (bfd_mach_o_scan_write_thread (abfd, cur) != 0)
return false;
break;
case BFD_MACH_O_LC_LOADFVMLIB:
case BFD_MACH_O_LC_IDFVMLIB:
case BFD_MACH_O_LC_IDENT:
case BFD_MACH_O_LC_FVMFILE:
case BFD_MACH_O_LC_PREPAGE:
case BFD_MACH_O_LC_DYSYMTAB:
case BFD_MACH_O_LC_LOAD_DYLIB:
case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
case BFD_MACH_O_LC_ID_DYLIB:
case BFD_MACH_O_LC_LOAD_DYLINKER:
case BFD_MACH_O_LC_ID_DYLINKER:
case BFD_MACH_O_LC_PREBOUND_DYLIB:
case BFD_MACH_O_LC_ROUTINES:
case BFD_MACH_O_LC_SUB_FRAMEWORK:
break;
default:
fprintf (stderr,
"unable to write unknown load command 0x%lx\n",
(long) cur->type);
return false;
}
}
return true;
}
static int
bfd_mach_o_sizeof_headers (a, b)
bfd *a ATTRIBUTE_UNUSED;
boolean b ATTRIBUTE_UNUSED;
{
return 0;
}
/* Make an empty symbol. This is required only because
bfd_make_section_anyway wants to create a symbol for the section. */
static asymbol *
bfd_mach_o_make_empty_symbol (abfd)
bfd *abfd;
{
asymbol *new;
new = (asymbol *) bfd_zalloc (abfd, sizeof (asymbol));
if (new == NULL)
return new;
new->the_bfd = abfd;
return new;
}
static int
bfd_mach_o_write_header (abfd, header)
bfd *abfd;
bfd_mach_o_header *header;
{
unsigned char buf[28];
bfd_h_put_32 (abfd, header->magic, buf + 0);
bfd_h_put_32 (abfd, header->cputype, buf + 4);
bfd_h_put_32 (abfd, header->cpusubtype, buf + 8);
bfd_h_put_32 (abfd, header->filetype, buf + 12);
bfd_h_put_32 (abfd, header->ncmds, buf + 16);
bfd_h_put_32 (abfd, header->sizeofcmds, buf + 20);
bfd_h_put_32 (abfd, header->flags, buf + 24);
bfd_seek (abfd, 0, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 28, abfd) != 28)
return -1;
return 0;
}
static int
bfd_mach_o_read_header (abfd, header)
bfd *abfd;
bfd_mach_o_header *header;
{
unsigned char buf[28];
bfd_vma (*get32) PARAMS ((const bfd_byte *)) = NULL;
bfd_seek (abfd, 0, SEEK_SET);
if (bfd_bread ((PTR) buf, 28, abfd) != 28)
return -1;
if (bfd_getb32 (buf) == 0xfeedface)
{
header->byteorder = BFD_ENDIAN_BIG;
header->magic = 0xfeedface;
get32 = bfd_getb32;
}
else if (bfd_getl32 (buf) == 0xfeedface)
{
header->byteorder = BFD_ENDIAN_LITTLE;
header->magic = 0xfeedface;
get32 = bfd_getl32;
}
else
{
header->byteorder = BFD_ENDIAN_UNKNOWN;
return -1;
}
header->cputype = (*get32) (buf + 4);
header->cpusubtype = (*get32) (buf + 8);
header->filetype = (*get32) (buf + 12);
header->ncmds = (*get32) (buf + 16);
header->sizeofcmds = (*get32) (buf + 20);
header->flags = (*get32) (buf + 24);
return 0;
}
static asection *
bfd_mach_o_make_bfd_section (abfd, section)
bfd *abfd;
bfd_mach_o_section *section;
{
asection *bfdsec;
char *sname;
const char *prefix = "LC_SEGMENT";
unsigned int snamelen;
snamelen = strlen (prefix) + 1
+ strlen (section->segname) + 1
+ strlen (section->sectname) + 1;
sname = (char *) bfd_alloc (abfd, snamelen);
if (sname == NULL)
return NULL;
sprintf (sname, "%s.%s.%s", prefix, section->segname, section->sectname);
bfdsec = bfd_make_section_anyway (abfd, sname);
if (bfdsec == NULL)
return NULL;
bfdsec->vma = section->addr;
bfdsec->lma = section->addr;
bfdsec->_raw_size = section->size;
bfdsec->filepos = section->offset;
bfdsec->alignment_power = section->align;
if (section->flags & BFD_MACH_O_S_ZEROFILL)
bfdsec->flags = SEC_ALLOC;
else
bfdsec->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
return bfdsec;
}
static int
bfd_mach_o_scan_read_section (abfd, section, offset)
bfd *abfd;
bfd_mach_o_section *section;
bfd_vma offset;
{
unsigned char buf[68];
bfd_seek (abfd, offset, SEEK_SET);
if (bfd_bread ((PTR) buf, 68, abfd) != 68)
return -1;
memcpy (section->sectname, buf, 16);
section->sectname[16] = '\0';
memcpy (section->segname, buf + 16, 16);
section->segname[16] = '\0';
section->addr = bfd_h_get_32 (abfd, buf + 32);
section->size = bfd_h_get_32 (abfd, buf + 36);
section->offset = bfd_h_get_32 (abfd, buf + 40);
section->align = bfd_h_get_32 (abfd, buf + 44);
section->reloff = bfd_h_get_32 (abfd, buf + 48);
section->nreloc = bfd_h_get_32 (abfd, buf + 52);
section->flags = bfd_h_get_32 (abfd, buf + 56);
section->reserved1 = bfd_h_get_32 (abfd, buf + 60);
section->reserved2 = bfd_h_get_32 (abfd, buf + 64);
section->bfdsection = bfd_mach_o_make_bfd_section (abfd, section);
if (section->bfdsection == NULL)
return -1;
return 0;
}
static int
bfd_mach_o_scan_write_section (abfd, section, offset)
bfd *abfd;
bfd_mach_o_section *section;
bfd_vma offset;
{
unsigned char buf[68];
memcpy (buf, section->sectname, 16);
memcpy (buf + 16, section->segname, 16);
bfd_h_put_32 (abfd, section->addr, buf + 32);
bfd_h_put_32 (abfd, section->size, buf + 36);
bfd_h_put_32 (abfd, section->offset, buf + 40);
bfd_h_put_32 (abfd, section->align, buf + 44);
bfd_h_put_32 (abfd, section->reloff, buf + 48);
bfd_h_put_32 (abfd, section->nreloc, buf + 52);
bfd_h_put_32 (abfd, section->flags, buf + 56);
/* bfd_h_put_32 (abfd, section->reserved1, buf + 60); */
/* bfd_h_put_32 (abfd, section->reserved2, buf + 64); */
bfd_seek (abfd, offset, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 68, abfd) != 68)
return -1;
return 0;
}
static int
bfd_mach_o_scan_write_symtab_symbols (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
bfd_mach_o_symtab_command *sym = &command->command.symtab;
asymbol *s = NULL;
unsigned long i;
for (i = 0; i < sym->nsyms; i++)
{
unsigned char buf[12];
bfd_vma symoff = sym->symoff + (i * 12);
unsigned char ntype = 0;
unsigned char nsect = 0;
short ndesc = 0;
s = &sym->symbols[i];
/* Don't set this from the symbol information; use stored values. */
#if 0
if (s->flags & BSF_GLOBAL)
ntype |= N_EXT;
if (s->flags & BSF_DEBUGGING)
ntype |= N_STAB;
if (s->section == bfd_und_section_ptr)
ntype |= N_UNDF;
else if (s->section == bfd_abs_section_ptr)
ntype |= N_ABS;
else
ntype |= N_SECT;
#endif
/* Instead just set from the stored values. */
ntype = (s->udata.i >> 24) & 0xff;
nsect = (s->udata.i >> 16) & 0xff;
ndesc = s->udata.i & 0xffff;
bfd_h_put_32 (abfd, s->name - sym->strtab, 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_32 (abfd, s->section->vma + s->value, buf + 8);
bfd_seek (abfd, symoff, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 12, abfd) != 12)
{
fprintf (stderr, "bfd_mach_o_scan_write_symtab_symbols: unable to write %d bytes at %lu\n",
12, (unsigned long) symoff);
return -1;
}
}
return 0;
}
int
bfd_mach_o_scan_read_symtab_symbol (abfd, sym, s, i)
bfd *abfd;
bfd_mach_o_symtab_command *sym;
asymbol *s;
unsigned long i;
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
bfd_vma symoff = sym->symoff + (i * 12);
unsigned char buf[12];
unsigned char type = -1;
unsigned char section = -1;
short desc = -1;
long value = -1;
unsigned long stroff = -1;
unsigned int symtype = -1;
BFD_ASSERT (sym->strtab != NULL);
bfd_seek (abfd, symoff, SEEK_SET);
if (bfd_bread ((PTR) buf, 12, abfd) != 12)
{
fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: unable to read %d bytes at %lu\n",
12, (unsigned long) symoff);
return -1;
}
stroff = bfd_h_get_32 (abfd, buf);
type = bfd_h_get_8 (abfd, buf + 4);
symtype = (type & 0x0e);
section = bfd_h_get_8 (abfd, buf + 5) - 1;
desc = bfd_h_get_16 (abfd, buf + 6);
value = bfd_h_get_32 (abfd, buf + 8);
if (stroff >= sym->strsize)
{
fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbol: symbol name out of range (%lu >= %lu)\n",
(unsigned long) stroff, (unsigned long) sym->strsize);
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;
if (type & BFD_MACH_O_N_STAB)
{
s->flags |= BSF_DEBUGGING;
s->section = bfd_und_section_ptr;
}
else
{
if (type & BFD_MACH_O_N_PEXT)
{
type &= ~BFD_MACH_O_N_PEXT;
s->flags |= BSF_GLOBAL;
}
if (type & BFD_MACH_O_N_EXT)
{
type &= ~BFD_MACH_O_N_EXT;
s->flags |= BSF_GLOBAL;
}
switch (symtype)
{
case BFD_MACH_O_N_UNDF:
s->section = bfd_und_section_ptr;
break;
case BFD_MACH_O_N_PBUD:
s->section = bfd_und_section_ptr;
break;
case BFD_MACH_O_N_ABS:
s->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;
}
else
{
/* Mach-O uses 0 to mean "no section"; not an error. */
if (section != 0)
{
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->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;
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;
break;
}
}
return 0;
}
int
bfd_mach_o_scan_read_symtab_strtab (abfd, sym)
bfd *abfd;
bfd_mach_o_symtab_command *sym;
{
BFD_ASSERT (sym->strtab == NULL);
if (abfd->flags & BFD_IN_MEMORY)
{
struct bfd_in_memory *b;
b = (struct bfd_in_memory *) abfd->iostream;
if ((sym->stroff + sym->strsize) > b->size)
{
bfd_set_error (bfd_error_file_truncated);
return -1;
}
sym->strtab = b->buffer + sym->stroff;
return 0;
}
sym->strtab = bfd_alloc (abfd, sym->strsize);
if (sym->strtab == NULL)
return -1;
bfd_seek (abfd, sym->stroff, SEEK_SET);
if (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);
return -1;
}
return 0;
}
int
bfd_mach_o_scan_read_symtab_symbols (abfd, sym)
bfd *abfd;
bfd_mach_o_symtab_command *sym;
{
unsigned long i;
int ret;
BFD_ASSERT (sym->symbols == NULL);
sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (asymbol));
if (sym->symbols == NULL)
{
fprintf (stderr, "bfd_mach_o_scan_read_symtab_symbols: unable to allocate memory for symbols\n");
return -1;
}
ret = bfd_mach_o_scan_read_symtab_strtab (abfd, sym);
if (ret != 0)
return ret;
for (i = 0; i < sym->nsyms; i++)
{
ret = bfd_mach_o_scan_read_symtab_symbol (abfd, sym, &sym->symbols[i], i);
if (ret != 0)
return ret;
}
return 0;
}
int
bfd_mach_o_scan_read_dysymtab_symbol (abfd, dysym, sym, s, i)
bfd *abfd;
bfd_mach_o_dysymtab_command *dysym;
bfd_mach_o_symtab_command *sym;
asymbol *s;
unsigned long i;
{
unsigned long isymoff = dysym->indirectsymoff + (i * 4);
unsigned long symindex;
unsigned char buf[4];
BFD_ASSERT (i < dysym->nindirectsyms);
bfd_seek (abfd, isymoff, SEEK_SET);
if (bfd_bread ((PTR) buf, 4, abfd) != 4)
{
fprintf (stderr, "bfd_mach_o_scan_read_dysymtab_symbol: unable to read %lu bytes at %lu\n",
(unsigned long) 4, isymoff);
return -1;
}
symindex = bfd_h_get_32 (abfd, buf);
return bfd_mach_o_scan_read_symtab_symbol (abfd, sym, s, symindex);
}
static const char *
bfd_mach_o_i386_flavour_string (flavour)
unsigned int flavour;
{
switch ((int) flavour)
{
case BFD_MACH_O_i386_NEW_THREAD_STATE: return "i386_NEW_THREAD_STATE";
case BFD_MACH_O_i386_FLOAT_STATE: return "i386_FLOAT_STATE";
case BFD_MACH_O_i386_ISA_PORT_MAP_STATE: return "i386_ISA_PORT_MAP_STATE";
case BFD_MACH_O_i386_V86_ASSIST_STATE: return "i386_V86_ASSIST_STATE";
case BFD_MACH_O_i386_REGS_SEGS_STATE: return "i386_REGS_SEGS_STATE";
case BFD_MACH_O_i386_THREAD_SYSCALL_STATE: return "i386_THREAD_SYSCALL_STATE";
case BFD_MACH_O_i386_THREAD_STATE_NONE: return "i386_THREAD_STATE_NONE";
case BFD_MACH_O_i386_SAVED_STATE: return "i386_SAVED_STATE";
case BFD_MACH_O_i386_THREAD_STATE: return "i386_THREAD_STATE";
case BFD_MACH_O_i386_THREAD_FPSTATE: return "i386_THREAD_FPSTATE";
case BFD_MACH_O_i386_THREAD_EXCEPTSTATE: return "i386_THREAD_EXCEPTSTATE";
case BFD_MACH_O_i386_THREAD_CTHREADSTATE: return "i386_THREAD_CTHREADSTATE";
default: return "UNKNOWN";
}
}
static const char *
bfd_mach_o_ppc_flavour_string (flavour)
unsigned int flavour;
{
switch ((int) flavour)
{
case BFD_MACH_O_PPC_THREAD_STATE: return "PPC_THREAD_STATE";
case BFD_MACH_O_PPC_FLOAT_STATE: return "PPC_FLOAT_STATE";
case BFD_MACH_O_PPC_EXCEPTION_STATE: return "PPC_EXCEPTION_STATE";
case BFD_MACH_O_PPC_VECTOR_STATE: return "PPC_VECTOR_STATE";
default: return "UNKNOWN";
}
}
static int
bfd_mach_o_scan_write_thread (abfd, command)
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 nflavours;
BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
|| (command->type == BFD_MACH_O_LC_UNIXTHREAD));
offset = 8;
nflavours = 0;
for (i = 0; i < cmd->nflavours; i++)
{
BFD_ASSERT ((cmd->flavours[i].size % 4) == 0);
BFD_ASSERT (cmd->flavours[i].offset == (command->offset + offset + 8));
bfd_h_put_32 (abfd, cmd->flavours[i].flavour, buf);
bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), buf + 4);
bfd_seek (abfd, command->offset + offset, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 8, abfd) != 8)
return -1;
offset += cmd->flavours[i].size + 8;
}
return 0;
}
static int
bfd_mach_o_scan_read_dylinker (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
bfd_mach_o_dylinker_command *cmd = &command->command.dylinker;
unsigned char buf[4];
unsigned int nameoff;
asection *bfdsec;
char *sname;
const char *prefix;
BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER)
|| (command->type == BFD_MACH_O_LC_LOAD_DYLINKER));
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bread ((PTR) buf, 4, abfd) != 4)
return -1;
nameoff = bfd_h_get_32 (abfd, buf + 0);
cmd->name_offset = command->offset + nameoff;
cmd->name_len = command->len - nameoff;
if (command->type == BFD_MACH_O_LC_LOAD_DYLINKER)
prefix = "LC_LOAD_DYLINKER";
else if (command->type == BFD_MACH_O_LC_ID_DYLINKER)
prefix = "LC_ID_DYLINKER";
else
abort ();
sname = (char *) bfd_alloc (abfd, strlen (prefix) + 1);
if (sname == NULL)
return -1;
strcpy (sname, prefix);
bfdsec = bfd_make_section_anyway (abfd, sname);
if (bfdsec == NULL)
return -1;
bfdsec->vma = 0;
bfdsec->lma = 0;
bfdsec->_raw_size = command->len - 8;
bfdsec->filepos = command->offset + 8;
bfdsec->alignment_power = 0;
bfdsec->flags = SEC_HAS_CONTENTS;
cmd->section = bfdsec;
return 0;
}
static int
bfd_mach_o_scan_read_dylib (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
bfd_mach_o_dylib_command *cmd = &command->command.dylib;
unsigned char buf[16];
unsigned int nameoff;
asection *bfdsec;
char *sname;
const char *prefix;
BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLIB)
|| (command->type == BFD_MACH_O_LC_LOAD_DYLIB)
|| (command->type == BFD_MACH_O_LC_LOAD_WEAK_DYLIB));
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bread ((PTR) buf, 16, abfd) != 16)
return -1;
nameoff = bfd_h_get_32 (abfd, buf + 0);
cmd->timestamp = bfd_h_get_32 (abfd, buf + 4);
cmd->current_version = bfd_h_get_32 (abfd, buf + 8);
cmd->compatibility_version = bfd_h_get_32 (abfd, buf + 12);
cmd->name_offset = command->offset + nameoff;
cmd->name_len = command->len - nameoff;
if (command->type == BFD_MACH_O_LC_LOAD_DYLIB)
prefix = "LC_LOAD_DYLIB";
else if (command->type == BFD_MACH_O_LC_LOAD_WEAK_DYLIB)
prefix = "LC_LOAD_WEAK_DYLIB";
else if (command->type == BFD_MACH_O_LC_ID_DYLIB)
prefix = "LC_ID_DYLIB";
else
abort ();
sname = (char *) bfd_alloc (abfd, strlen (prefix) + 1);
if (sname == NULL)
return -1;
strcpy (sname, prefix);
bfdsec = bfd_make_section_anyway (abfd, sname);
if (bfdsec == NULL)
return -1;
bfdsec->vma = 0;
bfdsec->lma = 0;
bfdsec->_raw_size = command->len - 8;
bfdsec->filepos = command->offset + 8;
bfdsec->alignment_power = 0;
bfdsec->flags = SEC_HAS_CONTENTS;
cmd->section = bfdsec;
return 0;
}
static int
bfd_mach_o_scan_read_prebound_dylib (abfd, command)
bfd *abfd ATTRIBUTE_UNUSED;
bfd_mach_o_load_command *command ATTRIBUTE_UNUSED;
{
/* bfd_mach_o_prebound_dylib_command *cmd = &command->command.prebound_dylib; */
BFD_ASSERT (command->type == BFD_MACH_O_LC_PREBOUND_DYLIB);
return 0;
}
static int
bfd_mach_o_scan_read_thread (abfd, command)
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 nflavours;
unsigned int i;
BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD)
|| (command->type == BFD_MACH_O_LC_UNIXTHREAD));
BFD_ASSERT (bfd_mach_o_valid (abfd));
mdata = abfd->tdata.mach_o_data;
offset = 8;
nflavours = 0;
while (offset != command->len)
{
if (offset >= command->len)
return -1;
bfd_seek (abfd, command->offset + offset, SEEK_SET);
if (bfd_bread ((PTR) buf, 8, abfd) != 8)
return -1;
offset += 8 + bfd_h_get_32 (abfd, buf + 4) * 4;
nflavours++;
}
cmd->flavours =
((bfd_mach_o_thread_flavour *)
bfd_alloc (abfd, nflavours * sizeof (bfd_mach_o_thread_flavour)));
if (cmd->flavours == NULL)
return -1;
cmd->nflavours = nflavours;
offset = 8;
nflavours = 0;
while (offset != command->len)
{
if (offset >= command->len)
return -1;
if (nflavours >= cmd->nflavours)
return -1;
bfd_seek (abfd, command->offset + offset, SEEK_SET);
if (bfd_bread ((PTR) buf, 8, abfd) != 8)
return -1;
cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, buf);
cmd->flavours[nflavours].offset = command->offset + offset + 8;
cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, buf + 4) * 4;
offset += cmd->flavours[nflavours].size + 8;
nflavours++;
}
for (i = 0; i < nflavours; i++)
{
asection *bfdsec;
unsigned int snamelen;
char *sname;
const char *flavourstr;
const char *prefix = "LC_THREAD";
unsigned int i = 0;
switch (mdata->header.cputype)
{
case BFD_MACH_O_CPU_TYPE_POWERPC:
flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour);
break;
case BFD_MACH_O_CPU_TYPE_I386:
flavourstr = bfd_mach_o_i386_flavour_string (cmd->flavours[i].flavour);
break;
default:
flavourstr = "UNKNOWN_ARCHITECTURE";
break;
}
snamelen = strlen (prefix) + 1 + 20 + 1 + strlen (flavourstr) + 1;
sname = (char *) bfd_alloc (abfd, snamelen);
if (sname == NULL)
return -1;
for (;;)
{
sprintf (sname, "%s.%s.%u", prefix, flavourstr, i);
if (bfd_get_section_by_name (abfd, sname) == NULL) {
break;
}
i++;
}
bfdsec = bfd_make_section (abfd, sname);
bfdsec->vma = 0;
bfdsec->lma = 0;
bfdsec->_raw_size = cmd->flavours[i].size;
bfdsec->filepos = cmd->flavours[i].offset;
bfdsec->alignment_power = 0x0;
bfdsec->flags = SEC_HAS_CONTENTS;
cmd->section = bfdsec;
}
return 0;
}
static int
bfd_mach_o_scan_write_symtab (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
bfd_mach_o_symtab_command *seg = &command->command.symtab;
unsigned char buf[16];
BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
bfd_h_put_32 (abfd, seg->symoff, buf);
bfd_h_put_32 (abfd, seg->nsyms, buf + 4);
bfd_h_put_32 (abfd, seg->stroff, buf + 8);
bfd_h_put_32 (abfd, seg->strsize, buf + 12);
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 16, abfd) != 16)
return -1;
if (bfd_mach_o_scan_write_symtab_symbols (abfd, command) != 0)
return -1;
return 0;
}
static int
bfd_mach_o_scan_read_dysymtab (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
bfd_mach_o_dysymtab_command *seg = &command->command.dysymtab;
unsigned char buf[72];
BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bread ((PTR) buf, 72, abfd) != 72)
return -1;
seg->ilocalsym = bfd_h_get_32 (abfd, buf + 0);
seg->nlocalsym = bfd_h_get_32 (abfd, buf + 4);
seg->iextdefsym = bfd_h_get_32 (abfd, buf + 8);
seg->nextdefsym = bfd_h_get_32 (abfd, buf + 12);
seg->iundefsym = bfd_h_get_32 (abfd, buf + 16);
seg->nundefsym = bfd_h_get_32 (abfd, buf + 20);
seg->tocoff = bfd_h_get_32 (abfd, buf + 24);
seg->ntoc = bfd_h_get_32 (abfd, buf + 28);
seg->modtaboff = bfd_h_get_32 (abfd, buf + 32);
seg->nmodtab = bfd_h_get_32 (abfd, buf + 36);
seg->extrefsymoff = bfd_h_get_32 (abfd, buf + 40);
seg->nextrefsyms = bfd_h_get_32 (abfd, buf + 44);
seg->indirectsymoff = bfd_h_get_32 (abfd, buf + 48);
seg->nindirectsyms = bfd_h_get_32 (abfd, buf + 52);
seg->extreloff = bfd_h_get_32 (abfd, buf + 56);
seg->nextrel = bfd_h_get_32 (abfd, buf + 60);
seg->locreloff = bfd_h_get_32 (abfd, buf + 64);
seg->nlocrel = bfd_h_get_32 (abfd, buf + 68);
return 0;
}
static int
bfd_mach_o_scan_read_symtab (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
bfd_mach_o_symtab_command *seg = &command->command.symtab;
unsigned char buf[16];
asection *bfdsec;
char *sname;
const char *prefix = "LC_SYMTAB.stabs";
BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB);
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bread ((PTR) buf, 16, abfd) != 16)
return -1;
seg->symoff = bfd_h_get_32 (abfd, buf);
seg->nsyms = bfd_h_get_32 (abfd, buf + 4);
seg->stroff = bfd_h_get_32 (abfd, buf + 8);
seg->strsize = bfd_h_get_32 (abfd, buf + 12);
seg->symbols = NULL;
seg->strtab = NULL;
sname = (char *) bfd_alloc (abfd, strlen (prefix) + 1);
if (sname == NULL)
return -1;
strcpy (sname, prefix);
bfdsec = bfd_make_section_anyway (abfd, sname);
if (bfdsec == NULL)
return -1;
bfdsec->vma = 0;
bfdsec->lma = 0;
bfdsec->_raw_size = seg->nsyms * 12;
bfdsec->filepos = seg->symoff;
bfdsec->alignment_power = 0;
bfdsec->flags = SEC_HAS_CONTENTS;
seg->stabs_segment = bfdsec;
prefix = "LC_SYMTAB.stabstr";
sname = (char *) bfd_alloc (abfd, strlen (prefix) + 1);
if (sname == NULL)
return -1;
strcpy (sname, prefix);
bfdsec = bfd_make_section_anyway (abfd, sname);
if (bfdsec == NULL)
return -1;
bfdsec->vma = 0;
bfdsec->lma = 0;
bfdsec->_raw_size = seg->strsize;
bfdsec->filepos = seg->stroff;
bfdsec->alignment_power = 0;
bfdsec->flags = SEC_HAS_CONTENTS;
seg->stabstr_segment = bfdsec;
return 0;
}
static int
bfd_mach_o_scan_read_segment (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
unsigned char buf[48];
bfd_mach_o_segment_command *seg = &command->command.segment;
unsigned long i;
asection *bfdsec;
char *sname;
const char *prefix = "LC_SEGMENT";
unsigned int snamelen;
BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bread ((PTR) buf, 48, abfd) != 48)
return -1;
memcpy (seg->segname, buf, 16);
seg->vmaddr = bfd_h_get_32 (abfd, buf + 16);
seg->vmsize = bfd_h_get_32 (abfd, buf + 20);
seg->fileoff = bfd_h_get_32 (abfd, buf + 24);
seg->filesize = bfd_h_get_32 (abfd, buf + 28);
/* seg->maxprot = bfd_h_get_32 (abfd, buf + 32); */
/* seg->initprot = bfd_h_get_32 (abfd, buf + 36); */
seg->nsects = bfd_h_get_32 (abfd, buf + 40);
seg->flags = bfd_h_get_32 (abfd, buf + 44);
snamelen = strlen (prefix) + 1 + strlen (seg->segname) + 1;
sname = (char *) bfd_alloc (abfd, snamelen);
if (sname == NULL)
return -1;
sprintf (sname, "%s.%s", prefix, seg->segname);
bfdsec = bfd_make_section_anyway (abfd, sname);
if (bfdsec == NULL)
return -1;
bfdsec->vma = seg->vmaddr;
bfdsec->lma = seg->vmaddr;
bfdsec->_raw_size = seg->filesize;
bfdsec->filepos = seg->fileoff;
bfdsec->alignment_power = 0x0;
bfdsec->flags = SEC_HAS_CONTENTS | SEC_LOAD | SEC_ALLOC | SEC_CODE;
seg->segment = bfdsec;
if (seg->nsects != 0)
{
seg->sections =
((bfd_mach_o_section *)
bfd_alloc (abfd, seg->nsects * sizeof (bfd_mach_o_section)));
if (seg->sections == NULL)
return -1;
for (i = 0; i < seg->nsects; i++)
{
bfd_vma segoff = command->offset + 48 + 8 + (i * 68);
if (bfd_mach_o_scan_read_section (abfd, &seg->sections[i], segoff) != 0)
return -1;
}
}
return 0;
}
static int
bfd_mach_o_scan_write_segment (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
unsigned char buf[48];
bfd_mach_o_segment_command *seg = &command->command.segment;
unsigned long i;
BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT);
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);
bfd_h_put_32 (abfd, seg->filesize, buf + 28);
bfd_h_put_32 (abfd, 0 /* seg->maxprot */, buf + 32);
bfd_h_put_32 (abfd, 0 /* seg->initprot */, buf + 36);
bfd_h_put_32 (abfd, seg->nsects, buf + 40);
bfd_h_put_32 (abfd, seg->flags, buf + 44);
bfd_seek (abfd, command->offset + 8, SEEK_SET);
if (bfd_bwrite ((PTR) buf, 48, abfd) != 48)
return -1;
{
char buf[1024];
bfd_vma nbytes = seg->filesize;
bfd_vma curoff = seg->fileoff;
while (nbytes > 0)
{
bfd_vma thisread = nbytes;
if (thisread > 1024)
thisread = 1024;
bfd_seek (abfd, curoff, SEEK_SET);
if (bfd_bread ((PTR) buf, thisread, abfd) != thisread)
return -1;
bfd_seek (abfd, curoff, SEEK_SET);
if (bfd_bwrite ((PTR) buf, thisread, abfd) != thisread)
return -1;
nbytes -= thisread;
curoff += thisread;
}
}
for (i = 0; i < seg->nsects; i++)
{
bfd_vma segoff = command->offset + 48 + 8 + (i * 68);
if (bfd_mach_o_scan_write_section (abfd, &seg->sections[i], segoff) != 0)
return -1;
}
return 0;
}
static int
bfd_mach_o_scan_read_command (abfd, command)
bfd *abfd;
bfd_mach_o_load_command *command;
{
unsigned char buf[8];
bfd_seek (abfd, command->offset, SEEK_SET);
if (bfd_bread ((PTR) buf, 8, abfd) != 8)
return -1;
command->type = (bfd_h_get_32 (abfd, buf) & ~BFD_MACH_O_LC_REQ_DYLD);
command->type_required = (bfd_h_get_32 (abfd, buf) & BFD_MACH_O_LC_REQ_DYLD) ? 1 : 0;
command->len = bfd_h_get_32 (abfd, buf + 4);
switch (command->type)
{
case BFD_MACH_O_LC_SEGMENT:
if (bfd_mach_o_scan_read_segment (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_SYMTAB:
if (bfd_mach_o_scan_read_symtab (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_SYMSEG:
break;
case BFD_MACH_O_LC_THREAD:
case BFD_MACH_O_LC_UNIXTHREAD:
if (bfd_mach_o_scan_read_thread (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_LOAD_DYLINKER:
case BFD_MACH_O_LC_ID_DYLINKER:
if (bfd_mach_o_scan_read_dylinker (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_LOAD_DYLIB:
case BFD_MACH_O_LC_ID_DYLIB:
case BFD_MACH_O_LC_LOAD_WEAK_DYLIB:
if (bfd_mach_o_scan_read_dylib (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_PREBOUND_DYLIB:
if (bfd_mach_o_scan_read_prebound_dylib (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_LOADFVMLIB:
case BFD_MACH_O_LC_IDFVMLIB:
case BFD_MACH_O_LC_IDENT:
case BFD_MACH_O_LC_FVMFILE:
case BFD_MACH_O_LC_PREPAGE:
case BFD_MACH_O_LC_ROUTINES:
case BFD_MACH_O_LC_SUB_FRAMEWORK:
break;
case BFD_MACH_O_LC_DYSYMTAB:
if (bfd_mach_o_scan_read_dysymtab (abfd, command) != 0)
return -1;
break;
case BFD_MACH_O_LC_SUB_UMBRELLA:
case BFD_MACH_O_LC_SUB_CLIENT:
case BFD_MACH_O_LC_SUB_LIBRARY:
case BFD_MACH_O_LC_TWOLEVEL_HINTS:
case BFD_MACH_O_LC_PREBIND_CKSUM:
break;
default:
fprintf (stderr, "unable to read unknown load command 0x%lx\n",
(unsigned long) command->type);
break;
}
return 0;
}
static void
bfd_mach_o_flatten_sections (abfd)
bfd *abfd;
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
long csect = 0;
unsigned long i, j;
mdata->nsects = 0;
for (i = 0; i < mdata->header.ncmds; i++)
{
if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT)
{
bfd_mach_o_segment_command *seg = &mdata->commands[i].command.segment;
mdata->nsects += seg->nsects;
}
}
mdata->sections = bfd_alloc (abfd, mdata->nsects * sizeof (bfd_mach_o_section *));
csect = 0;
for (i = 0; i < mdata->header.ncmds; i++)
{
if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT)
{
bfd_mach_o_segment_command *seg = &mdata->commands[i].command.segment;
BFD_ASSERT (csect + seg->nsects <= mdata->nsects);
for (j = 0; j < seg->nsects; j++)
mdata->sections[csect++] = &seg->sections[j];
}
}
}
int
bfd_mach_o_scan_start_address (abfd)
bfd *abfd;
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
bfd_mach_o_thread_command *cmd = NULL;
unsigned long i;
for (i = 0; i < mdata->header.ncmds; i++)
{
if ((mdata->commands[i].type == BFD_MACH_O_LC_THREAD) ||
(mdata->commands[i].type == BFD_MACH_O_LC_UNIXTHREAD))
{
if (cmd == NULL)
cmd = &mdata->commands[i].command.thread;
else
return 0;
}
}
if (cmd == NULL)
return 0;
for (i = 0; i < cmd->nflavours; i++)
{
if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_I386)
&& (cmd->flavours[i].flavour == (unsigned long) BFD_MACH_O_i386_THREAD_STATE))
{
unsigned char buf[4];
bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET);
if (bfd_bread (buf, 4, abfd) != 4)
return -1;
abfd->start_address = bfd_h_get_32 (abfd, buf);
}
else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC)
&& (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE))
{
unsigned char buf[4];
bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET);
if (bfd_bread (buf, 4, abfd) != 4)
return -1;
abfd->start_address = bfd_h_get_32 (abfd, buf);
}
}
return 0;
}
int
bfd_mach_o_scan (abfd, header)
bfd *abfd;
bfd_mach_o_header *header;
{
unsigned int i;
bfd_mach_o_data_struct *mdata = NULL;
enum bfd_architecture cputype;
unsigned long cpusubtype;
mdata = ((bfd_mach_o_data_struct *)
bfd_alloc (abfd, sizeof (bfd_mach_o_data_struct)));
if (mdata == NULL)
return -1;
mdata->header = *header;
mdata->symbols = NULL;
abfd->flags = abfd->xvec->object_flags | (abfd->flags & (BFD_IN_MEMORY | BFD_IO_FUNCS));
abfd->tdata.mach_o_data = mdata;
bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, &cputype, &cpusubtype);
if (cputype == bfd_arch_unknown)
{
fprintf (stderr, "bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx\n",
header->cputype, header->cpusubtype);
return -1;
}
bfd_set_arch_mach (abfd, cputype, cpusubtype);
if (header->ncmds != 0)
{
mdata->commands =
((bfd_mach_o_load_command *)
bfd_alloc (abfd, header->ncmds * sizeof (bfd_mach_o_load_command)));
if (mdata->commands == NULL)
return -1;
for (i = 0; i < header->ncmds; i++)
{
bfd_mach_o_load_command *cur = &mdata->commands[i];
if (i == 0)
cur->offset = 28;
else
{
bfd_mach_o_load_command *prev = &mdata->commands[i - 1];
cur->offset = prev->offset + prev->len;
}
if (bfd_mach_o_scan_read_command (abfd, cur) < 0)
return -1;
}
}
if (bfd_mach_o_scan_start_address (abfd) < 0)
{
#if 0
fprintf (stderr, "bfd_mach_o_scan: unable to scan start address: %s\n",
bfd_errmsg (bfd_get_error ()));
abfd->tdata.mach_o_data = NULL;
return -1;
#endif
}
bfd_mach_o_flatten_sections (abfd);
return 0;
}
boolean
bfd_mach_o_mkobject (abfd)
bfd *abfd;
{
bfd_mach_o_data_struct *mdata = NULL;
mdata = ((bfd_mach_o_data_struct *)
bfd_alloc (abfd, sizeof (bfd_mach_o_data_struct)));
if (mdata == NULL)
return false;
abfd->tdata.mach_o_data = mdata;
mdata->header.magic = 0;
mdata->header.cputype = 0;
mdata->header.cpusubtype = 0;
mdata->header.filetype = 0;
mdata->header.ncmds = 0;
mdata->header.sizeofcmds = 0;
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;
}
const bfd_target *
bfd_mach_o_object_p (abfd)
bfd *abfd;
{
bfd_mach_o_header header;
if (bfd_mach_o_read_header (abfd, &header) != 0)
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
if (! ((header.byteorder == BFD_ENDIAN_BIG)
|| (header.byteorder == BFD_ENDIAN_LITTLE)))
{
fprintf (stderr, "unknown header byte-order value 0x%lx\n", (long) header.byteorder);
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
if (! (((header.byteorder == BFD_ENDIAN_BIG)
&& (abfd->xvec->byteorder == BFD_ENDIAN_BIG)
&& (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG))
||
((header.byteorder == BFD_ENDIAN_LITTLE)
&& (abfd->xvec->byteorder == BFD_ENDIAN_LITTLE)
&& (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))))
{
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
abfd->tdata.mach_o_data = NULL;
if (bfd_mach_o_scan (abfd, &header) != 0)
{
abfd->tdata.mach_o_data = NULL;
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
return abfd->xvec;
}
const bfd_target *
bfd_mach_o_core_p (abfd)
bfd *abfd;
{
bfd_mach_o_header header;
bfd_set_error (bfd_error_wrong_format);
if (bfd_mach_o_read_header (abfd, &header) != 0)
return NULL;
if (! ((header.byteorder == BFD_ENDIAN_BIG)
|| (header.byteorder == BFD_ENDIAN_LITTLE)))
{
fprintf (stderr, "unknown header byte-order value 0x%lx\n", (long) header.byteorder);
abort ();
}
if (! (((header.byteorder == BFD_ENDIAN_BIG)
&& (abfd->xvec->byteorder == BFD_ENDIAN_BIG)
&& (abfd->xvec->header_byteorder == BFD_ENDIAN_BIG))
||
((header.byteorder == BFD_ENDIAN_LITTLE)
&& (abfd->xvec->byteorder == BFD_ENDIAN_LITTLE)
&& (abfd->xvec->header_byteorder == BFD_ENDIAN_LITTLE))))
return NULL;
if (header.filetype != BFD_MACH_O_MH_CORE)
return NULL;
abfd->tdata.mach_o_data = NULL;
if (bfd_mach_o_scan (abfd, &header) != 0)
{
abfd->tdata.mach_o_data = NULL;
return NULL;
}
return abfd->xvec;
}
typedef struct mach_o_fat_archentry
{
unsigned long cputype;
unsigned long cpusubtype;
unsigned long offset;
unsigned long size;
unsigned long align;
bfd *abfd;
} mach_o_fat_archentry;
typedef struct mach_o_fat_data_struct
{
unsigned long magic;
unsigned long nfat_arch;
mach_o_fat_archentry *archentries;
} mach_o_fat_data_struct;
const bfd_target *
bfd_mach_o_archive_p (abfd)
bfd *abfd;
{
mach_o_fat_data_struct *adata;
unsigned char buf[20];
unsigned long i;
bfd_seek (abfd, 0, SEEK_SET);
if (bfd_bread ((PTR) buf, 8, abfd) != 8)
return NULL;
adata = (mach_o_fat_data_struct *)
bfd_alloc (abfd, sizeof (mach_o_fat_data_struct));
if (adata == NULL)
return NULL;
adata->magic = bfd_getb32 (buf);
adata->nfat_arch = bfd_getb32 (buf + 4);
if (adata->magic != 0xcafebabe)
return NULL;
adata->archentries = (mach_o_fat_archentry *)
bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry));
if (adata->archentries == NULL)
return NULL;
for (i = 0; i < adata->nfat_arch; i++)
{
bfd_seek (abfd, 8 + 20 * i, SEEK_SET);
if (bfd_bread ((PTR) buf, 20, abfd) != 20)
return NULL;
adata->archentries[i].cputype = bfd_getb32 (buf);
adata->archentries[i].cpusubtype = bfd_getb32 (buf + 4);
adata->archentries[i].offset = bfd_getb32 (buf + 8);
adata->archentries[i].size = bfd_getb32 (buf + 12);
adata->archentries[i].align = bfd_getb32 (buf + 16);
adata->archentries[i].abfd = NULL;
}
abfd->tdata.mach_o_fat_data = adata;
return abfd->xvec;
}
bfd *
bfd_mach_o_openr_next_archived_file (archive, prev)
bfd *archive;
bfd *prev;
{
mach_o_fat_data_struct *adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data;
mach_o_fat_archentry *entry = NULL;
unsigned long i;
BFD_ASSERT (adata != NULL);
/* Find index of previous entry. */
if (prev == NULL)
i = 0; /* Start at first one. */
else
{
for (i = 0; i < adata->nfat_arch; i++)
{
if (adata->archentries[i].abfd == prev)
break;
}
if (i == adata->nfat_arch)
{
/* Not found. */
bfd_set_error (bfd_error_bad_value);
return NULL;
}
i++; /* Get next entry. */
}
if (i >= adata->nfat_arch)
{
bfd_set_error (bfd_error_no_more_archived_files);
return NULL;
}
entry = &adata->archentries[i];
if (entry->abfd == NULL)
{
bfd *nbfd = _bfd_new_bfd_contained_in (archive);
char *s = NULL;
if (nbfd == NULL)
return NULL;
nbfd->origin = entry->offset;
s = bfd_malloc (strlen (archive->filename) + 1);
if (s == NULL)
return NULL;
strcpy (s, archive->filename);
nbfd->filename = s;
nbfd->iostream = NULL;
entry->abfd = nbfd;
}
return entry->abfd;
}
int bfd_mach_o_lookup_section
(bfd *abfd, asection *section,
bfd_mach_o_load_command **mcommand, bfd_mach_o_section **msection)
{
struct mach_o_data_struct *md = abfd->tdata.mach_o_data;
unsigned int i, j, num;
bfd_mach_o_load_command *ncmd = NULL;
bfd_mach_o_section *nsect = NULL;
BFD_ASSERT (mcommand != NULL);
BFD_ASSERT (msection != NULL);
num = 0;
for (i = 0; i < md->header.ncmds; i++)
{
struct bfd_mach_o_load_command *cmd = &md->commands[i];
struct bfd_mach_o_segment_command *seg = NULL;
if (cmd->type != BFD_MACH_O_LC_SEGMENT)
continue;
seg = &cmd->command.segment;
if (seg->segment == section)
{
if (num == 0)
ncmd = cmd;
num++;
}
for (j = 0; j < seg->nsects; j++)
{
struct bfd_mach_o_section *sect = &seg->sections[j];
if (sect->bfdsection == section)
{
if (num == 0)
nsect = sect;
num++;
}
}
}
*mcommand = ncmd;
*msection = nsect;
return num;
}
int
bfd_mach_o_lookup_command
(bfd *abfd, bfd_mach_o_load_command_type type,
bfd_mach_o_load_command **mcommand)
{
struct mach_o_data_struct *md = NULL;
bfd_mach_o_load_command *ncmd = NULL;
unsigned int i, num;
md = abfd->tdata.mach_o_data;
BFD_ASSERT (md != NULL);
BFD_ASSERT (mcommand != NULL);
num = 0;
for (i = 0; i < md->header.ncmds; i++)
{
struct bfd_mach_o_load_command *cmd = &md->commands[i];
if (cmd->type != type)
continue;
if (num == 0)
ncmd = cmd;
num++;
}
*mcommand = ncmd;
return num;
}
unsigned long
bfd_mach_o_stack_addr (type)
enum bfd_mach_o_cpu_type type;
{
switch (type)
{
case BFD_MACH_O_CPU_TYPE_MC680x0:
return 0x04000000;
case BFD_MACH_O_CPU_TYPE_MC88000:
return 0xffffe000;
case BFD_MACH_O_CPU_TYPE_POWERPC:
return 0xc0000000;
case BFD_MACH_O_CPU_TYPE_I386:
return 0xc0000000;
case BFD_MACH_O_CPU_TYPE_SPARC:
return 0xf0000000;
case BFD_MACH_O_CPU_TYPE_I860:
return 0;
case BFD_MACH_O_CPU_TYPE_HPPA:
return (0xc0000000-0x04000000);
default:
return 0;
}
}
int
bfd_mach_o_core_fetch_environment (abfd, rbuf, rlen)
bfd *abfd;
unsigned char **rbuf;
unsigned int *rlen;
{
bfd_mach_o_data_struct *mdata = abfd->tdata.mach_o_data;
unsigned long stackaddr = bfd_mach_o_stack_addr (mdata->header.cputype);
unsigned int i = 0;
for (i = 0; i < mdata->header.ncmds; i++)
{
bfd_mach_o_load_command *cur = &mdata->commands[i];
bfd_mach_o_segment_command *seg = NULL;
if (cur->type != BFD_MACH_O_LC_SEGMENT)
continue;
seg = &cur->command.segment;
if ((seg->vmaddr + seg->vmsize) == stackaddr)
{
unsigned long start = seg->fileoff;
unsigned long end = seg->fileoff + seg->filesize;
unsigned char *buf = bfd_malloc (1024);
unsigned long size = 1024;
for (;;)
{
bfd_size_type nread = 0;
unsigned long offset;
int found_nonnull = 0;
if (size > (end - start))
size = (end - start);
buf = bfd_realloc (buf, size);
bfd_seek (abfd, end - size, SEEK_SET);
nread = bfd_bread (buf, size, abfd);
if (nread != size)
return -1;
for (offset = 4; offset <= size; offset += 4)
{
unsigned long val = *((unsigned long *) (buf + size - offset));
if (! found_nonnull)
{
if (val != 0)
found_nonnull = 1;
}
else if (val == 0x0)
{
unsigned long bottom = seg->fileoff + seg->filesize - offset;
unsigned long top = seg->fileoff + seg->filesize - 4;
*rbuf = bfd_malloc (top - bottom);
*rlen = top - bottom;
memcpy (*rbuf, buf + size - *rlen, *rlen);
return 0;
}
}
if (size == (end - start))
break;
size *= 2;
}
}
}
return -1;
}
char *
bfd_mach_o_core_file_failing_command (abfd)
bfd *abfd;
{
unsigned char *buf = NULL;
unsigned int len = 0;
int ret = -1;
ret = bfd_mach_o_core_fetch_environment (abfd, &buf, &len);
if (ret < 0)
return NULL;
return buf;
}
int
bfd_mach_o_core_file_failing_signal (abfd)
bfd *abfd ATTRIBUTE_UNUSED;
{
return 0;
}
boolean
bfd_mach_o_core_file_matches_executable_p (core_bfd, exec_bfd)
bfd *core_bfd ATTRIBUTE_UNUSED;
bfd *exec_bfd ATTRIBUTE_UNUSED;
{
return true;
}
#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
#undef TARGET_STRING
#undef TARGET_BIG_ENDIAN
#undef TARGET_ARCHIVE
#define TARGET_NAME mach_o_le_vec
#define TARGET_STRING "mach-o-le"
#define TARGET_BIG_ENDIAN 0
#define TARGET_ARCHIVE 0
#include "mach-o-target.c"
#undef TARGET_NAME
#undef TARGET_STRING
#undef TARGET_BIG_ENDIAN
#undef TARGET_ARCHIVE
#define TARGET_NAME mach_o_fat_vec
#define TARGET_STRING "mach-o-fat"
#define TARGET_BIG_ENDIAN 1
#define TARGET_ARCHIVE 1
#include "mach-o-target.c"
#undef TARGET_NAME
#undef TARGET_STRING
#undef TARGET_BIG_ENDIAN
#undef TARGET_ARCHIVE
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