/* Mach-O support for BFD.
Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
- 2009, 2010, 2011
+ 2009, 2010, 2011, 2012
Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#include "mach-o/reloc.h"
#include "mach-o/external.h"
#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
#define bfd_mach_o_object_p bfd_mach_o_gen_object_p
#define bfd_mach_o_core_p bfd_mach_o_gen_core_p
SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR,
BFD_MACH_O_S_ATTR_NONE, 0},
{ ".eh_frame", "__eh_frame",
- SEC_READONLY | SEC_LOAD, BFD_MACH_O_S_COALESCED,
+ SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_COALESCED,
BFD_MACH_O_S_ATTR_LIVE_SUPPORT
| BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS
- | BFD_MACH_O_S_ATTR_NO_TOC, 3},
+ | BFD_MACH_O_S_ATTR_NO_TOC, 2},
{ NULL, NULL, 0, 0, 0, 0}
};
{ NULL, NULL }
};
+static const char dsym_subdir[] = ".dSYM/Contents/Resources/DWARF";
+
/* For both cases bfd-name => mach-o name and vice versa, the specific target
is checked before the generic. This allows a target (e.g. ppc for cstring)
to override the generic definition with a more specific one. */
bfd_boolean
bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED,
- asymbol *isymbol ATTRIBUTE_UNUSED,
+ asymbol *isymbol,
bfd *obfd ATTRIBUTE_UNUSED,
- asymbol *osymbol ATTRIBUTE_UNUSED)
+ asymbol *osymbol)
{
+ bfd_mach_o_asymbol *os, *is;
+ os = (bfd_mach_o_asymbol *)osymbol;
+ is = (bfd_mach_o_asymbol *)isymbol;
+ os->n_type = is->n_type;
+ os->n_sect = is->n_sect;
+ os->n_desc = is->n_desc;
+ os->symbol.udata.i = is->symbol.udata.i;
return TRUE;
}
return nsyms;
}
+/* Create synthetic symbols for indirect symbols. */
+
long
bfd_mach_o_get_synthetic_symtab (bfd *abfd,
long symcount ATTRIBUTE_UNUSED,
*ret = NULL;
+ /* Stop now if no symbols or no indirect symbols. */
if (dysymtab == NULL || symtab == NULL || symtab->symbols == NULL)
return 0;
if (dysymtab->nindirectsyms == 0)
return 0;
+ /* We need to allocate a bfd symbol for every indirect symbol and to
+ allocate the memory for its name. */
count = dysymtab->nindirectsyms;
size = count * sizeof (asymbol) + 1;
for (j = 0; j < count; j++)
{
unsigned int isym = dysymtab->indirect_syms[j];
-
+
+ /* Some indirect symbols are anonymous. */
if (isym < symtab->nsyms && symtab->symbols[isym].symbol.name)
size += strlen (symtab->symbols[isym].symbol.name) + sizeof ("$stub");
}
case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
case BFD_MACH_O_S_SYMBOL_STUBS:
+ /* Only these sections have indirect symbols. */
first = sec->reserved1;
last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec);
addr = sec->addr;
static void
bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype,
- bfd_mach_o_cpu_subtype msubtype ATTRIBUTE_UNUSED,
+ bfd_mach_o_cpu_subtype msubtype,
enum bfd_architecture *type,
unsigned long *subtype)
{
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_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;
*subtype = bfd_mach_i386_i386;
*type = bfd_arch_i386;
*subtype = bfd_mach_x86_64;
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_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;
+ switch (msubtype)
+ {
+ case BFD_MACH_O_CPU_SUBTYPE_ARM_V4T:
+ *subtype = bfd_mach_arm_4T;
+ break;
+ case BFD_MACH_O_CPU_SUBTYPE_ARM_V6:
+ *subtype = bfd_mach_arm_4T; /* Best fit ? */
+ break;
+ case BFD_MACH_O_CPU_SUBTYPE_ARM_V5TEJ:
+ *subtype = bfd_mach_arm_5TE;
+ break;
+ case BFD_MACH_O_CPU_SUBTYPE_ARM_XSCALE:
+ *subtype = bfd_mach_arm_XScale;
+ break;
+ case BFD_MACH_O_CPU_SUBTYPE_ARM_V7:
+ *subtype = bfd_mach_arm_5TE; /* Best fit ? */
+ break;
+ case BFD_MACH_O_CPU_SUBTYPE_ARM_ALL:
+ default:
+ break;
+ }
+ break;
+ case BFD_MACH_O_CPU_TYPE_MC88000:
+ *type = bfd_arch_m88k;
+ break;
case BFD_MACH_O_CPU_TYPE_SPARC:
*type = bfd_arch_sparc;
*subtype = bfd_mach_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_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;
*subtype = bfd_mach_ppc;
return (asect->reloc_count + 1) * sizeof (arelent *);
}
+/* In addition to the need to byte-swap the symbol number, the bit positions
+ of the fields in the relocation information vary per target endian-ness. */
+
+static void
+bfd_mach_o_swap_in_non_scattered_reloc (bfd *abfd, bfd_mach_o_reloc_info *rel,
+ unsigned char *fields)
+{
+ unsigned char info = fields[3];
+
+ if (bfd_big_endian (abfd))
+ {
+ rel->r_value = (fields[0] << 16) | (fields[1] << 8) | fields[2];
+ rel->r_type = (info >> BFD_MACH_O_BE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
+ rel->r_pcrel = (info & BFD_MACH_O_BE_PCREL) ? 1 : 0;
+ rel->r_length = (info >> BFD_MACH_O_BE_LENGTH_SHIFT)
+ & BFD_MACH_O_LENGTH_MASK;
+ rel->r_extern = (info & BFD_MACH_O_BE_EXTERN) ? 1 : 0;
+ }
+ else
+ {
+ rel->r_value = (fields[2] << 16) | (fields[1] << 8) | fields[0];
+ rel->r_type = (info >> BFD_MACH_O_LE_TYPE_SHIFT) & BFD_MACH_O_TYPE_MASK;
+ rel->r_pcrel = (info & BFD_MACH_O_LE_PCREL) ? 1 : 0;
+ rel->r_length = (info >> BFD_MACH_O_LE_LENGTH_SHIFT)
+ & BFD_MACH_O_LENGTH_MASK;
+ rel->r_extern = (info & BFD_MACH_O_LE_EXTERN) ? 1 : 0;
+ }
+}
+
static int
bfd_mach_o_canonicalize_one_reloc (bfd *abfd,
struct mach_o_reloc_info_external *raw,
bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
bfd_mach_o_reloc_info reloc;
bfd_vma addr;
- bfd_vma symnum;
asymbol **sym;
addr = bfd_get_32 (abfd, raw->r_address);
- symnum = bfd_get_32 (abfd, raw->r_symbolnum);
-
+ res->sym_ptr_ptr = NULL;
+ res->addend = 0;
+
if (addr & BFD_MACH_O_SR_SCATTERED)
{
unsigned int j;
+ bfd_vma symnum = bfd_get_32 (abfd, raw->r_symbolnum);
- /* Scattered relocation.
- Extract section and offset from r_value. */
- res->sym_ptr_ptr = NULL;
- res->addend = 0;
+ /* Scattered relocation, can't be extern. */
+ reloc.r_scattered = 1;
+ reloc.r_extern = 0;
+
+ /* Extract section and offset from r_value (symnum). */
+ reloc.r_value = symnum;
+ /* FIXME: This breaks when a symbol in a reloc exactly follows the
+ end of the data for the section (e.g. in a calculation of section
+ data length). At present, the symbol will end up associated with
+ the following section or, if it falls within alignment padding, as
+ null - which will assert later. */
for (j = 0; j < mdata->nsects; j++)
{
bfd_mach_o_section *sect = mdata->sections[j];
break;
}
}
- res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
+
+ /* Extract the info and address fields from r_address. */
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;
+ reloc.r_address = BFD_MACH_O_GET_SR_TYPE (addr);
+ res->address = BFD_MACH_O_GET_SR_ADDRESS (addr);
}
else
{
- unsigned int num = BFD_MACH_O_GET_R_SYMBOLNUM (symnum);
- res->addend = 0;
- res->address = addr;
- if (symnum & BFD_MACH_O_R_EXTERN)
- {
- sym = syms + num;
- reloc.r_extern = 1;
- }
+ unsigned int num;
+
+ /* Non-scattered relocation. */
+ reloc.r_scattered = 0;
+
+ /* The value and info fields have to be extracted dependent on target
+ endian-ness. */
+ bfd_mach_o_swap_in_non_scattered_reloc (abfd, &reloc, raw->r_symbolnum);
+ num = reloc.r_value;
+
+ if (reloc.r_extern)
+ {
+ /* An external symbol number. */
+ sym = syms + num;
+ }
+ else if (num == 0x00ffffff)
+ {
+ /* The 'symnum' in a non-scattered PAIR is 0x00ffffff. But as this
+ is generic code, we don't know wether this is really a PAIR.
+ This value is almost certainly not a valid section number, hence
+ this specific case to avoid an assertion failure.
+ Target specific swap_reloc_in routine should adjust that. */
+ sym = bfd_abs_section_ptr->symbol_ptr_ptr;
+ }
else
{
+ /* A section number. */
BFD_ASSERT (num != 0);
BFD_ASSERT (num <= mdata->nsects);
+
sym = mdata->sections[num - 1]->bfdsection->symbol_ptr_ptr;
/* For a symbol defined in section S, the addend (stored in the
binary) contains the address of the section. To comply with
- bfd conventio, substract the section address.
+ bfd convention, subtract the section address.
Use the address from the header, so that the user can modify
the vma of the section. */
res->addend = -mdata->sections[num - 1]->addr;
- reloc.r_extern = 0;
}
+ /* Note: Pairs for PPC LO/HI/HA are not scattered, but contain the offset
+ in the lower 16bits of the address value. So we have to find the
+ 'symbol' from the preceding reloc. We do this even though the
+ section symbol is probably not needed here, because NULL symbol
+ values cause an assert in generic BFD code. This must be done in
+ the PPC swap_reloc_in routine. */
res->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;
+
+ /* The 'address' is just r_address.
+ ??? maybe this should be masked with 0xffffff for safety. */
+ res->address = addr;
+ reloc.r_address = addr;
}
-
+
+ /* We have set up a reloc with all the information present, so the swapper
+ can modify address, value and addend fields, if necessary, to convey
+ information in the generic BFD reloc that is mach-o specific. */
+
if (!(*bed->_bfd_mach_o_swap_reloc_in)(res, &reloc))
return -1;
return 0;
return i;
}
+/* In addition to the need to byte-swap the symbol number, the bit positions
+ of the fields in the relocation information vary per target endian-ness. */
+
+static void
+bfd_mach_o_swap_out_non_scattered_reloc (bfd *abfd, unsigned char *fields,
+ bfd_mach_o_reloc_info *rel)
+{
+ unsigned char info = 0;
+
+ BFD_ASSERT (rel->r_type <= 15);
+ BFD_ASSERT (rel->r_length <= 3);
+
+ if (bfd_big_endian (abfd))
+ {
+ fields[0] = (rel->r_value >> 16) & 0xff;
+ fields[1] = (rel->r_value >> 8) & 0xff;
+ fields[2] = rel->r_value & 0xff;
+ info |= rel->r_type << BFD_MACH_O_BE_TYPE_SHIFT;
+ info |= rel->r_pcrel ? BFD_MACH_O_BE_PCREL : 0;
+ info |= rel->r_length << BFD_MACH_O_BE_LENGTH_SHIFT;
+ info |= rel->r_extern ? BFD_MACH_O_BE_EXTERN : 0;
+ }
+ else
+ {
+ fields[2] = (rel->r_value >> 16) & 0xff;
+ fields[1] = (rel->r_value >> 8) & 0xff;
+ fields[0] = rel->r_value & 0xff;
+ info |= rel->r_type << BFD_MACH_O_LE_TYPE_SHIFT;
+ info |= rel->r_pcrel ? BFD_MACH_O_LE_PCREL : 0;
+ info |= rel->r_length << BFD_MACH_O_LE_LENGTH_SHIFT;
+ info |= rel->r_extern ? BFD_MACH_O_LE_EXTERN : 0;
+ }
+ fields[3] = info;
+}
+
static bfd_boolean
bfd_mach_o_write_relocs (bfd *abfd, bfd_mach_o_section *section)
{
- bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
unsigned int i;
arelent **entries;
asection *sec;
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;
}
else
{
- unsigned long v;
-
bfd_put_32 (abfd, pinfo->r_address, raw.r_address);
- 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, raw.r_symbolnum);
+ bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum,
+ pinfo);
}
if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd)
{
bfd_size_type str_index;
bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
-
- /* Compute name index. */
- /* An index of 0 always means the empty string. */
+
if (s->symbol.name == 0 || s->symbol.name[0] == '\0')
+ /* An index of 0 always means the empty string. */
str_index = 0;
else
{
str_index = _bfd_stringtab_add (strtab, s->symbol.name, TRUE, FALSE);
+
if (str_index == (bfd_size_type) -1)
goto err;
}
return FALSE;
}
-/* Process the symbols and generate Mach-O specific fields.
- Number them. */
+/* Write a dysymtab command.
+ TODO: Possibly coalesce writes of smaller objects. */
+
+static bfd_boolean
+bfd_mach_o_write_dysymtab (bfd *abfd, bfd_mach_o_load_command *command)
+{
+ bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab;
+
+ BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB);
+
+ if (cmd->nmodtab != 0)
+ {
+ unsigned int i;
+
+ if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0)
+ return FALSE;
+
+ for (i = 0; i < cmd->nmodtab; i++)
+ {
+ bfd_mach_o_dylib_module *module = &cmd->dylib_module[i];
+ unsigned int iinit;
+ unsigned int ninit;
+
+ iinit = module->iinit & 0xffff;
+ iinit |= ((module->iterm & 0xffff) << 16);
+
+ ninit = module->ninit & 0xffff;
+ ninit |= ((module->nterm & 0xffff) << 16);
+
+ if (bfd_mach_o_wide_p (abfd))
+ {
+ struct mach_o_dylib_module_64_external w;
+
+ bfd_h_put_32 (abfd, module->module_name_idx, &w.module_name);
+ bfd_h_put_32 (abfd, module->iextdefsym, &w.iextdefsym);
+ bfd_h_put_32 (abfd, module->nextdefsym, &w.nextdefsym);
+ bfd_h_put_32 (abfd, module->irefsym, &w.irefsym);
+ bfd_h_put_32 (abfd, module->nrefsym, &w.nrefsym);
+ bfd_h_put_32 (abfd, module->ilocalsym, &w.ilocalsym);
+ bfd_h_put_32 (abfd, module->nlocalsym, &w.nlocalsym);
+ bfd_h_put_32 (abfd, module->iextrel, &w.iextrel);
+ bfd_h_put_32 (abfd, module->nextrel, &w.nextrel);
+ bfd_h_put_32 (abfd, iinit, &w.iinit_iterm);
+ bfd_h_put_32 (abfd, ninit, &w.ninit_nterm);
+ bfd_h_put_64 (abfd, module->objc_module_info_addr,
+ &w.objc_module_info_addr);
+ bfd_h_put_32 (abfd, module->objc_module_info_size,
+ &w.objc_module_info_size);
+
+ if (bfd_bwrite ((void *) &w, sizeof (w), abfd) != sizeof (w))
+ return FALSE;
+ }
+ else
+ {
+ struct mach_o_dylib_module_external n;
+
+ bfd_h_put_32 (abfd, module->module_name_idx, &n.module_name);
+ bfd_h_put_32 (abfd, module->iextdefsym, &n.iextdefsym);
+ bfd_h_put_32 (abfd, module->nextdefsym, &n.nextdefsym);
+ bfd_h_put_32 (abfd, module->irefsym, &n.irefsym);
+ bfd_h_put_32 (abfd, module->nrefsym, &n.nrefsym);
+ bfd_h_put_32 (abfd, module->ilocalsym, &n.ilocalsym);
+ bfd_h_put_32 (abfd, module->nlocalsym, &n.nlocalsym);
+ bfd_h_put_32 (abfd, module->iextrel, &n.iextrel);
+ bfd_h_put_32 (abfd, module->nextrel, &n.nextrel);
+ bfd_h_put_32 (abfd, iinit, &n.iinit_iterm);
+ bfd_h_put_32 (abfd, ninit, &n.ninit_nterm);
+ bfd_h_put_32 (abfd, module->objc_module_info_addr,
+ &n.objc_module_info_addr);
+ bfd_h_put_32 (abfd, module->objc_module_info_size,
+ &n.objc_module_info_size);
+
+ if (bfd_bwrite ((void *) &n, sizeof (n), abfd) != sizeof (n))
+ return FALSE;
+ }
+ }
+ }
+
+ if (cmd->ntoc != 0)
+ {
+ unsigned int i;
+
+ if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0)
+ return FALSE;
+
+ for (i = 0; i < cmd->ntoc; i++)
+ {
+ struct mach_o_dylib_table_of_contents_external raw;
+ bfd_mach_o_dylib_table_of_content *toc = &cmd->dylib_toc[i];
+
+ bfd_h_put_32 (abfd, toc->symbol_index, &raw.symbol_index);
+ bfd_h_put_32 (abfd, toc->module_index, &raw.module_index);
+
+ if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+ }
+ }
+
+ if (cmd->nindirectsyms > 0)
+ {
+ unsigned int i;
+
+ if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0)
+ return FALSE;
+
+ for (i = 0; i < cmd->nindirectsyms; ++i)
+ {
+ unsigned char raw[4];
+
+ bfd_h_put_32 (abfd, cmd->indirect_syms[i], &raw);
+ if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+ }
+ }
+
+ if (cmd->nextrefsyms != 0)
+ {
+ unsigned int i;
+
+ if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0)
+ return FALSE;
+
+ for (i = 0; i < cmd->nextrefsyms; i++)
+ {
+ unsigned long v;
+ unsigned char raw[4];
+ bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i];
+
+ /* Fields isym and flags are written as bit-fields, thus we need
+ a specific processing for endianness. */
+
+ if (bfd_big_endian (abfd))
+ {
+ v = ((ref->isym & 0xffffff) << 8);
+ v |= ref->flags & 0xff;
+ }
+ else
+ {
+ v = ref->isym & 0xffffff;
+ v |= ((ref->flags & 0xff) << 24);
+ }
+
+ bfd_h_put_32 (abfd, v, raw);
+ if (bfd_bwrite (raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+ }
+ }
+
+ /* The command. */
+ if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0)
+ return FALSE;
+ else
+ {
+ struct mach_o_dysymtab_command_external raw;
+
+ bfd_h_put_32 (abfd, cmd->ilocalsym, &raw.ilocalsym);
+ bfd_h_put_32 (abfd, cmd->nlocalsym, &raw.nlocalsym);
+ bfd_h_put_32 (abfd, cmd->iextdefsym, &raw.iextdefsym);
+ bfd_h_put_32 (abfd, cmd->nextdefsym, &raw.nextdefsym);
+ bfd_h_put_32 (abfd, cmd->iundefsym, &raw.iundefsym);
+ bfd_h_put_32 (abfd, cmd->nundefsym, &raw.nundefsym);
+ bfd_h_put_32 (abfd, cmd->tocoff, &raw.tocoff);
+ bfd_h_put_32 (abfd, cmd->ntoc, &raw.ntoc);
+ bfd_h_put_32 (abfd, cmd->modtaboff, &raw.modtaboff);
+ bfd_h_put_32 (abfd, cmd->nmodtab, &raw.nmodtab);
+ bfd_h_put_32 (abfd, cmd->extrefsymoff, &raw.extrefsymoff);
+ bfd_h_put_32 (abfd, cmd->nextrefsyms, &raw.nextrefsyms);
+ bfd_h_put_32 (abfd, cmd->indirectsymoff, &raw.indirectsymoff);
+ bfd_h_put_32 (abfd, cmd->nindirectsyms, &raw.nindirectsyms);
+ bfd_h_put_32 (abfd, cmd->extreloff, &raw.extreloff);
+ bfd_h_put_32 (abfd, cmd->nextrel, &raw.nextrel);
+ bfd_h_put_32 (abfd, cmd->locreloff, &raw.locreloff);
+ bfd_h_put_32 (abfd, cmd->nlocrel, &raw.nlocrel);
+
+ if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static unsigned
+bfd_mach_o_primary_symbol_sort_key (bfd_mach_o_asymbol *s)
+{
+ unsigned mtyp = s->n_type & BFD_MACH_O_N_TYPE;
+
+ /* Just leave debug symbols where they are (pretend they are local, and
+ then they will just be sorted on position). */
+ if (s->n_type & BFD_MACH_O_N_STAB)
+ return 0;
+
+ /* Local (we should never see an undefined local AFAICT). */
+ if (! (s->n_type & (BFD_MACH_O_N_EXT | BFD_MACH_O_N_PEXT)))
+ return 0;
+
+ /* Common symbols look like undefined externs. */
+ if (mtyp == BFD_MACH_O_N_UNDF)
+ return 2;
+
+ /* A defined non-local, non-debug symbol. */
+ return 1;
+}
+
+static int
+bfd_mach_o_cf_symbols (const void *a, const void *b)
+{
+ bfd_mach_o_asymbol *sa = *(bfd_mach_o_asymbol **) a;
+ bfd_mach_o_asymbol *sb = *(bfd_mach_o_asymbol **) b;
+ unsigned int soa, sob;
+
+ soa = bfd_mach_o_primary_symbol_sort_key (sa);
+ sob = bfd_mach_o_primary_symbol_sort_key (sb);
+ if (soa < sob)
+ return -1;
+
+ if (soa > sob)
+ return 1;
+
+ /* If it's local or stab, just preserve the input order. */
+ if (soa == 0)
+ {
+ if (sa->symbol.udata.i < sb->symbol.udata.i)
+ return -1;
+ if (sa->symbol.udata.i > sb->symbol.udata.i)
+ return 1;
+
+ /* This is probably an error. */
+ return 0;
+ }
+
+ /* The second sort key is name. */
+ return strcmp (sa->symbol.name, sb->symbol.name);
+}
+
+/* Process the symbols.
+
+ This should be OK for single-module files - but it is not likely to work
+ for multi-module shared libraries.
+
+ (a) If the application has not filled in the relevant mach-o fields, make
+ an estimate.
+
+ (b) Order them, like this:
+ ( i) local.
+ (unsorted)
+ ( ii) external defined
+ (by name)
+ (iii) external undefined/common
+ (by name)
+ ( iv) common
+ (by name)
+*/
static bfd_boolean
bfd_mach_o_mangle_symbols (bfd *abfd)
unsigned long i;
asymbol **symbols = bfd_get_outsymbols (abfd);
+ if (symbols == NULL || bfd_get_symcount (abfd) == 0)
+ return TRUE;
+
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))
+ /* We use this value, which is out-of-range as a symbol index, to signal
+ that the mach-o-specific data are not filled in and need to be created
+ from the bfd values. It is much preferable for the application to do
+ this, since more meaningful diagnostics can be made that way. */
+
+ if (s->symbol.udata.i == SYM_MACHO_FIELDS_UNSET)
{
- /* 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. */
+ /* No symbol information has been set - therefore determine
+ it from the bfd symbol flags/info. */
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;
+ /* mach-o automatically makes undefined symbols extern. */
+ s->n_type |= BFD_MACH_O_N_EXT;
+ s->symbol.flags |= BSF_GLOBAL;
}
else if (s->symbol.section == bfd_com_section_ptr)
- s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
+ {
+ s->n_type = BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT;
+ s->symbol.flags |= BSF_GLOBAL;
+ }
else
s->n_type = BFD_MACH_O_N_SECT;
s->n_type |= BFD_MACH_O_N_EXT;
}
- /* Compute section index. */
- if (s->symbol.section != bfd_abs_section_ptr
+ /* Put the section index in, where required. */
+ 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;
+ || ((s->n_type & BFD_MACH_O_N_STAB) != 0
+ && s->symbol.name == NULL))
+ s->n_sect = s->symbol.section->target_index;
- /* Number symbols. */
+ /* Number to preserve order for local and debug syms. */
s->symbol.udata.i = i;
}
+
+ /* Sort the symbols. */
+ qsort ((void *) symbols, (size_t) bfd_get_symcount (abfd),
+ sizeof (asymbol *), bfd_mach_o_cf_symbols);
+
+ for (i = 0; i < bfd_get_symcount (abfd); ++i)
+ {
+ bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i];
+ s->symbol.udata.i = i; /* renumber. */
+ }
+
+ return TRUE;
+}
+
+/* We build a flat table of sections, which can be re-ordered if necessary.
+ Fill in the section number and other mach-o-specific data. */
+
+static bfd_boolean
+bfd_mach_o_mangle_sections (bfd *abfd, bfd_mach_o_data_struct *mdata)
+{
+ asection *sec;
+ unsigned target_index;
+ unsigned nsect;
+
+ nsect = bfd_count_sections (abfd);
+
+ /* Don't do it if it's already set - assume the application knows what it's
+ doing. */
+ if (mdata->nsects == nsect
+ && (mdata->nsects == 0 || mdata->sections != NULL))
+ return TRUE;
+
+ mdata->nsects = nsect;
+ mdata->sections = bfd_alloc (abfd,
+ mdata->nsects * sizeof (bfd_mach_o_section *));
+ if (mdata->sections == NULL)
+ return FALSE;
+
+ /* We need to check that this can be done... */
+ if (nsect > 255)
+ (*_bfd_error_handler) (_("mach-o: there are too many sections (%d)"
+ " maximum is 255,\n"), nsect);
+
+ /* Create Mach-O sections.
+ Section type, attribute and align should have been set when the
+ section was created - either read in or specified. */
+ target_index = 0;
+ for (sec = abfd->sections; sec; sec = sec->next)
+ {
+ unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
+ bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
+
+ mdata->sections[target_index] = msect;
+
+ msect->addr = bfd_get_section_vma (abfd, sec);
+ msect->size = bfd_get_section_size (sec);
+
+ /* Use the largest alignment set, in case it was bumped after the
+ section was created. */
+ msect->align = msect->align > bfd_align ? msect->align : bfd_align;
+
+ msect->offset = 0;
+ sec->target_index = ++target_index;
+ }
+
return TRUE;
}
unsigned int i;
bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
+ /* Make the commands, if not already present. */
if (mdata->header.ncmds == 0)
if (!bfd_mach_o_build_commands (abfd))
return FALSE;
- /* Now write header information. */
- if (mdata->header.filetype == 0)
- {
- if (abfd->flags & EXEC_P)
- mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
- else if (abfd->flags & DYNAMIC)
- mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
- else
- mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
- }
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++)
{
struct mach_o_load_command_external raw;
if (!bfd_mach_o_write_symtab (abfd, cur))
return FALSE;
break;
+ case BFD_MACH_O_LC_DYSYMTAB:
+ if (!bfd_mach_o_write_dysymtab (abfd, cur))
+ return FALSE;
+ break;
case BFD_MACH_O_LC_SYMSEG:
break;
case BFD_MACH_O_LC_THREAD:
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:
s->flags = BFD_MACH_O_S_REGULAR;
}
-/* Build Mach-O load commands from the sections. */
+/* Count the number of sections in the list for the segment named.
+
+ The special case of NULL or "" for the segment name is valid for
+ an MH_OBJECT file and means 'all sections available'.
+
+ Requires that the sections table in mdata be filled in.
+
+ Returns the number of sections (0 is valid).
+ Any number > 255 signals an invalid section count, although we will,
+ perhaps, allow the file to be written (in line with Darwin tools up
+ to XCode 4).
+
+ A section count of (unsigned long) -1 signals a definite error. */
+
+static unsigned long
+bfd_mach_o_count_sections_for_seg (const char *segment,
+ bfd_mach_o_data_struct *mdata)
+{
+ unsigned i,j;
+ if (mdata == NULL || mdata->sections == NULL)
+ return (unsigned long) -1;
+
+ /* The MH_OBJECT case, all sections are considered; Although nsects is
+ is an unsigned long, the maximum valid section count is 255 and this
+ will have been checked already by mangle_sections. */
+ if (segment == NULL || segment[0] == '\0')
+ return mdata->nsects;
+
+ /* Count the number of sections we see in this segment. */
+ j = 0;
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *s = mdata->sections[i];
+ if (strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) == 0)
+ j++;
+ }
+ return j;
+}
+
+static bfd_boolean
+bfd_mach_o_build_seg_command (const char *segment,
+ bfd_mach_o_data_struct *mdata,
+ bfd_mach_o_segment_command *seg)
+{
+ unsigned i;
+ int is_mho = (segment == NULL || segment[0] == '\0');
+
+ /* Fill segment command. */
+ if (is_mho)
+ memset (seg->segname, 0, sizeof (seg->segname));
+ else
+ strncpy (seg->segname, segment, sizeof (seg->segname));
+
+ /* TODO: fix this up for non-MH_OBJECT cases. */
+ seg->vmaddr = 0;
+ seg->vmsize = 0;
+
+ seg->fileoff = mdata->filelen;
+ seg->filesize = 0;
+ seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
+ | BFD_MACH_O_PROT_EXECUTE;
+ seg->initprot = seg->maxprot;
+ seg->flags = 0;
+ seg->sect_head = NULL;
+ seg->sect_tail = NULL;
+
+ /* Append sections to the segment.
+
+ This is a little tedious, we have to honor the need to account zerofill
+ sections after all the rest. This forces us to do the calculation of
+ total vmsize in three passes so that any alignment increments are
+ properly accounted. */
+
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *s = mdata->sections[i];
+ asection *sec = s->bfdsection;
+
+ /* If we're not making an MH_OBJECT, check whether this section is from
+ our segment, and skip if not. Otherwise, just add all sections. */
+ if (! is_mho
+ && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
+ continue;
+
+ /* Although we account for zerofill section sizes in vm order, they are
+ placed in the file in source sequence. */
+ bfd_mach_o_append_section_to_segment (seg, sec);
+ s->offset = 0;
+
+ /* Zerofill sections have zero file size & offset,
+ and are not written. */
+ if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) == BFD_MACH_O_S_ZEROFILL
+ || (s->flags & BFD_MACH_O_SECTION_TYPE_MASK)
+ == BFD_MACH_O_S_GB_ZEROFILL)
+ continue;
+
+ if (s->size > 0)
+ {
+ seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
+ seg->vmsize += s->size;
+
+ seg->filesize = FILE_ALIGN (seg->filesize, s->align);
+ seg->filesize += s->size;
+
+ mdata->filelen = FILE_ALIGN (mdata->filelen, s->align);
+ s->offset = mdata->filelen;
+ }
+
+ sec->filepos = s->offset;
+ mdata->filelen += s->size;
+ }
+
+ /* Now pass through again, for zerofill, only now we just update the vmsize. */
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *s = mdata->sections[i];
+
+ if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_ZEROFILL)
+ continue;
+
+ if (! is_mho
+ && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
+ continue;
+
+ if (s->size > 0)
+ {
+ seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
+ seg->vmsize += s->size;
+ }
+ }
+
+ /* Now pass through again, for zerofill_GB. */
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *s = mdata->sections[i];
+
+ if ((s->flags & BFD_MACH_O_SECTION_TYPE_MASK) != BFD_MACH_O_S_GB_ZEROFILL)
+ continue;
+
+ if (! is_mho
+ && strncmp (segment, s->segname, BFD_MACH_O_SEGNAME_SIZE) != 0)
+ continue;
+
+ if (s->size > 0)
+ {
+ seg->vmsize = FILE_ALIGN (seg->vmsize, s->align);
+ seg->vmsize += s->size;
+ }
+ }
+
+ /* Allocate space for the relocations. */
+ mdata->filelen = FILE_ALIGN(mdata->filelen, 2);
+
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *ms = mdata->sections[i];
+ asection *sec = ms->bfdsection;
+
+ if ((ms->nreloc = sec->reloc_count) == 0)
+ {
+ ms->reloff = 0;
+ continue;
+ }
+ sec->rel_filepos = mdata->filelen;
+ ms->reloff = sec->rel_filepos;
+ mdata->filelen += sec->reloc_count * BFD_MACH_O_RELENT_SIZE;
+ }
+
+ return TRUE;
+}
+
+/* Count the number of indirect symbols in the image.
+ Requires that the sections are in their final order. */
+
+static unsigned int
+bfd_mach_o_count_indirect_symbols (bfd *abfd, bfd_mach_o_data_struct *mdata)
+{
+ unsigned int i;
+ unsigned int nisyms = 0;
+
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *sec = mdata->sections[i];
+
+ switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
+ {
+ case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
+ case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
+ case BFD_MACH_O_S_SYMBOL_STUBS:
+ nisyms += bfd_mach_o_section_get_nbr_indirect (abfd, sec);
+ break;
+ default:
+ break;
+ }
+ }
+ return nisyms;
+}
+
+static bfd_boolean
+bfd_mach_o_build_dysymtab_command (bfd *abfd,
+ bfd_mach_o_data_struct *mdata,
+ bfd_mach_o_load_command *cmd)
+{
+ bfd_mach_o_dysymtab_command *dsym = &cmd->command.dysymtab;
+
+ /* TODO:
+ We are not going to try and fill these in yet and, moreover, we are
+ going to bail if they are already set. */
+ if (dsym->nmodtab != 0
+ || dsym->ntoc != 0
+ || dsym->nextrefsyms != 0)
+ {
+ (*_bfd_error_handler) (_("sorry: modtab, toc and extrefsyms are not yet"
+ " implemented for dysymtab commands."));
+ return FALSE;
+ }
+
+ dsym->ilocalsym = 0;
+
+ if (bfd_get_symcount (abfd) > 0)
+ {
+ asymbol **symbols = bfd_get_outsymbols (abfd);
+ unsigned long i;
+
+ /* Count the number of each kind of symbol. */
+ 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_EXT | BFD_MACH_O_N_PEXT))
+ break;
+ }
+ dsym->nlocalsym = i;
+ dsym->iextdefsym = i;
+ for (; 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_TYPE) == BFD_MACH_O_N_UNDF)
+ break;
+ }
+ dsym->nextdefsym = i - dsym->nlocalsym;
+ dsym->iundefsym = dsym->nextdefsym + dsym->iextdefsym;
+ dsym->nundefsym = bfd_get_symcount (abfd)
+ - dsym->nlocalsym
+ - dsym->nextdefsym;
+ }
+ else
+ {
+ dsym->nlocalsym = 0;
+ dsym->iextdefsym = 0;
+ dsym->nextdefsym = 0;
+ dsym->iundefsym = 0;
+ dsym->nundefsym = 0;
+ }
+
+ dsym->nindirectsyms = bfd_mach_o_count_indirect_symbols (abfd, mdata);
+ if (dsym->nindirectsyms > 0)
+ {
+ unsigned i;
+ unsigned n;
+
+ mdata->filelen = FILE_ALIGN (mdata->filelen, 2);
+ dsym->indirectsymoff = mdata->filelen;
+ mdata->filelen += dsym->nindirectsyms * 4;
+
+ dsym->indirect_syms = bfd_zalloc (abfd, dsym->nindirectsyms * 4);
+ if (dsym->indirect_syms == NULL)
+ return FALSE;
+
+ n = 0;
+ for (i = 0; i < mdata->nsects; ++i)
+ {
+ bfd_mach_o_section *sec = mdata->sections[i];
+
+ switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK)
+ {
+ case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS:
+ case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS:
+ case BFD_MACH_O_S_SYMBOL_STUBS:
+ {
+ unsigned j, num;
+ bfd_mach_o_asymbol **isyms = sec->indirect_syms;
+
+ num = bfd_mach_o_section_get_nbr_indirect (abfd, sec);
+ if (isyms == NULL || num == 0)
+ break;
+ /* Record the starting index in the reserved1 field. */
+ sec->reserved1 = n;
+ for (j = 0; j < num; j++, n++)
+ {
+ if (isyms[j] == NULL)
+ dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL;
+ else if (isyms[j]->symbol.section == bfd_abs_section_ptr
+ && ! (isyms[j]->n_type & BFD_MACH_O_N_EXT))
+ dsym->indirect_syms[n] = BFD_MACH_O_INDIRECT_SYM_LOCAL
+ | BFD_MACH_O_INDIRECT_SYM_ABS;
+ else
+ dsym->indirect_syms[n] = isyms[j]->symbol.udata.i;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+/* Build Mach-O load commands (currently assuming an MH_OBJECT file).
+ TODO: Other file formats, rebuilding symtab/dysymtab commands for strip
+ and copy functionality. */
+
+bfd_boolean
+bfd_mach_o_build_commands (bfd *abfd)
+{
+ bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
+ unsigned wide = mach_o_wide_p (&mdata->header);
+ int segcmd_idx = -1;
+ int symtab_idx = -1;
+ int dysymtab_idx = -1;
+ unsigned long base_offset = 0;
+
+ /* Return now if commands are already present. */
+ if (mdata->header.ncmds)
+ return FALSE;
+
+ /* Fill in the file type, if not already set. */
+
+ if (mdata->header.filetype == 0)
+ {
+ if (abfd->flags & EXEC_P)
+ mdata->header.filetype = BFD_MACH_O_MH_EXECUTE;
+ else if (abfd->flags & DYNAMIC)
+ mdata->header.filetype = BFD_MACH_O_MH_DYLIB;
+ else
+ mdata->header.filetype = BFD_MACH_O_MH_OBJECT;
+ }
-bfd_boolean
-bfd_mach_o_build_commands (bfd *abfd)
-{
- bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
- unsigned int wide = mach_o_wide_p (&mdata->header);
- bfd_mach_o_segment_command *seg;
- asection *sec;
- bfd_mach_o_load_command *cmd;
- bfd_mach_o_load_command *symtab_cmd;
- int target_index;
+ /* If hasn't already been done, flatten sections list, and sort
+ if/when required. Must be done before the symbol table is adjusted,
+ since that depends on properly numbered sections. */
+ if (mdata->nsects == 0 || mdata->sections == NULL)
+ if (! bfd_mach_o_mangle_sections (abfd, mdata))
+ return FALSE;
- /* Return now if commands are already built. */
- if (mdata->header.ncmds)
+ /* Order the symbol table, fill-in/check mach-o specific fields and
+ partition out any indirect symbols. */
+ if (!bfd_mach_o_mangle_symbols (abfd))
return FALSE;
- /* Very simple version: a command (segment) to contain all the sections and
- a command for the symbol table. */
- mdata->header.ncmds = 2;
- mdata->commands = bfd_alloc (abfd, mdata->header.ncmds
- * sizeof (bfd_mach_o_load_command));
- if (mdata->commands == NULL)
- return FALSE;
- cmd = &mdata->commands[0];
- seg = &cmd->command.segment;
+ /* Very simple command set (only really applicable to MH_OBJECTs):
+ All the commands are optional - present only when there is suitable data.
+ (i.e. it is valid to have an empty file)
- seg->nsects = bfd_count_sections (abfd);
+ a command (segment) to contain all the sections,
+ command for the symbol table,
+ a command for the dysymtab.
- /* Set segment command. */
- if (wide)
+ ??? maybe we should assert that this is an MH_OBJECT? */
+
+ if (mdata->nsects > 0)
{
- cmd->type = BFD_MACH_O_LC_SEGMENT_64;
- cmd->offset = BFD_MACH_O_HEADER_64_SIZE;
- cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
- + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
+ segcmd_idx = 0;
+ mdata->header.ncmds = 1;
}
- else
+
+ if (bfd_get_symcount (abfd) > 0)
{
- cmd->type = BFD_MACH_O_LC_SEGMENT;
- cmd->offset = BFD_MACH_O_HEADER_SIZE;
- cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
- + BFD_MACH_O_SECTION_SIZE * seg->nsects;
+ mdata->header.ncmds++;
+ symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */
}
- cmd->type_required = FALSE;
- mdata->header.sizeofcmds = cmd->len;
- mdata->filelen = cmd->offset + cmd->len;
- /* Set symtab command. */
- symtab_cmd = &mdata->commands[1];
-
- symtab_cmd->type = BFD_MACH_O_LC_SYMTAB;
- symtab_cmd->offset = cmd->offset + cmd->len;
- symtab_cmd->len = 6 * 4;
- symtab_cmd->type_required = FALSE;
-
- mdata->header.sizeofcmds += symtab_cmd->len;
- mdata->filelen += symtab_cmd->len;
+ /* FIXME:
+ This is a rather crude test for whether we should build a dysymtab. */
+ if (bfd_mach_o_should_emit_dysymtab ()
+ && bfd_get_symcount (abfd))
+ {
+ mdata->header.ncmds++;
+ /* If there should be a case where a dysymtab could be emitted without
+ a symtab (seems improbable), this would need amending. */
+ dysymtab_idx = symtab_idx + 1;
+ }
- /* Fill segment command. */
- memset (seg->segname, 0, sizeof (seg->segname));
- seg->vmaddr = 0;
- seg->fileoff = mdata->filelen;
- seg->filesize = 0;
- seg->maxprot = BFD_MACH_O_PROT_READ | BFD_MACH_O_PROT_WRITE
- | BFD_MACH_O_PROT_EXECUTE;
- seg->initprot = seg->maxprot;
- seg->flags = 0;
- seg->sect_head = NULL;
- seg->sect_tail = NULL;
+ if (wide)
+ base_offset = BFD_MACH_O_HEADER_64_SIZE;
+ else
+ base_offset = BFD_MACH_O_HEADER_SIZE;
- /* Create Mach-O sections.
- Section type, attribute and align should have been set when the
- section was created - either read in or specified. */
- target_index = 0;
- for (sec = abfd->sections; sec; sec = sec->next)
- {
- unsigned bfd_align = bfd_get_section_alignment (abfd, sec);
- bfd_mach_o_section *msect = bfd_mach_o_get_mach_o_section (sec);
+ /* Well, we must have a header, at least. */
+ mdata->filelen = base_offset;
- bfd_mach_o_append_section_to_segment (seg, sec);
+ /* A bit unusual, but no content is valid;
+ as -n empty.s -o empty.o */
+ if (mdata->header.ncmds == 0)
+ return TRUE;
- msect->addr = bfd_get_section_vma (abfd, sec);
- msect->size = bfd_get_section_size (sec);
- /* Use the largest alignment set, in case it was bumped after the
- section was created. */
- msect->align = msect->align > bfd_align ? msect->align : bfd_align;
+ mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds
+ * sizeof (bfd_mach_o_load_command));
+ if (mdata->commands == NULL)
+ return FALSE;
- if (msect->size != 0)
- {
- mdata->filelen = FILE_ALIGN (mdata->filelen, msect->align);
- msect->offset = mdata->filelen;
- }
+ if (segcmd_idx >= 0)
+ {
+ bfd_mach_o_load_command *cmd = &mdata->commands[segcmd_idx];
+ bfd_mach_o_segment_command *seg = &cmd->command.segment;
+
+ /* Count the segctions in the special blank segment used for MH_OBJECT. */
+ seg->nsects = bfd_mach_o_count_sections_for_seg (NULL, mdata);
+ if (seg->nsects == (unsigned long) -1)
+ return FALSE;
+
+ /* Init segment command. */
+ cmd->offset = base_offset;
+ if (wide)
+ {
+ cmd->type = BFD_MACH_O_LC_SEGMENT_64;
+ cmd->len = BFD_MACH_O_LC_SEGMENT_64_SIZE
+ + BFD_MACH_O_SECTION_64_SIZE * seg->nsects;
+ }
else
- msect->offset = 0;
+ {
+ cmd->type = BFD_MACH_O_LC_SEGMENT;
+ cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE
+ + BFD_MACH_O_SECTION_SIZE * seg->nsects;
+ }
- sec->filepos = msect->offset;
- sec->target_index = ++target_index;
+ cmd->type_required = FALSE;
+ mdata->header.sizeofcmds = cmd->len;
+ mdata->filelen += cmd->len;
+ }
+
+ if (symtab_idx >= 0)
+ {
+ /* Init symtab command. */
+ bfd_mach_o_load_command *cmd = &mdata->commands[symtab_idx];
+
+ cmd->type = BFD_MACH_O_LC_SYMTAB;
+ cmd->offset = base_offset;
+ if (segcmd_idx >= 0)
+ cmd->offset += mdata->commands[segcmd_idx].len;
+
+ cmd->len = sizeof (struct mach_o_symtab_command_external)
+ + BFD_MACH_O_LC_SIZE;
+ cmd->type_required = FALSE;
+ mdata->header.sizeofcmds += cmd->len;
+ mdata->filelen += cmd->len;
+ }
+
+ /* If required, setup symtab command, see comment above about the quality
+ of this test. */
+ if (dysymtab_idx >= 0)
+ {
+ bfd_mach_o_load_command *cmd = &mdata->commands[dysymtab_idx];
+
+ cmd->type = BFD_MACH_O_LC_DYSYMTAB;
+ if (symtab_idx >= 0)
+ cmd->offset = mdata->commands[symtab_idx].offset
+ + mdata->commands[symtab_idx].len;
+ else if (segcmd_idx >= 0)
+ cmd->offset = mdata->commands[segcmd_idx].offset
+ + mdata->commands[segcmd_idx].len;
+ else
+ cmd->offset = base_offset;
+
+ cmd->type_required = FALSE;
+ cmd->len = sizeof (struct mach_o_dysymtab_command_external)
+ + BFD_MACH_O_LC_SIZE;
- mdata->filelen += msect->size;
+ mdata->header.sizeofcmds += cmd->len;
+ mdata->filelen += cmd->len;
}
- seg->filesize = mdata->filelen - seg->fileoff;
- seg->vmsize = seg->filesize;
+ /* So, now we have sized the commands and the filelen set to that.
+ Now we can build the segment command and set the section file offsets. */
+ if (segcmd_idx >= 0
+ && ! bfd_mach_o_build_seg_command
+ (NULL, mdata, &mdata->commands[segcmd_idx].command.segment))
+ return FALSE;
+
+ /* If we're doing a dysymtab, cmd points to its load command. */
+ if (dysymtab_idx >= 0
+ && ! bfd_mach_o_build_dysymtab_command (abfd, mdata,
+ &mdata->commands[dysymtab_idx]))
+ return FALSE;
+
+ /* The symtab command is filled in when the symtab is written. */
return TRUE;
}
{
file_ptr pos;
- /* This must be done first, because bfd_set_section_contents is
- going to set output_has_begun to TRUE. */
+ /* Trying to write the first section contents will trigger the creation of
+ the load commands if they are not already present. */
if (! abfd->output_has_begun && ! bfd_mach_o_build_commands (abfd))
return FALSE;
if (new_symbol == NULL)
return new_symbol;
new_symbol->the_bfd = abfd;
- new_symbol->udata.i = 0;
+ new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET;
return new_symbol;
}
if (mach_o_wide_p (header))
header->reserved = (*get32) (raw.reserved);
+ else
+ header->reserved = 0;
return TRUE;
}
s->symbol.name = sym->strtab + stroff;
s->symbol.value = value;
s->symbol.flags = 0x0;
- s->symbol.udata.i = 0;
+ s->symbol.udata.i = i;
s->n_type = type;
s->n_sect = section;
s->n_desc = desc;
}
else
{
- if (type & BFD_MACH_O_N_PEXT)
- s->symbol.flags |= BSF_GLOBAL;
-
- if (type & BFD_MACH_O_N_EXT)
+ if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT))
s->symbol.flags |= BSF_GLOBAL;
-
- if (!(type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)))
+ else
s->symbol.flags |= BSF_LOCAL;
switch (symtype)
return 0;
}
+static int
+bfd_mach_o_read_fvmlib (bfd *abfd, bfd_mach_o_load_command *command)
+{
+ bfd_mach_o_fvmlib_command *fvm = &command->command.fvmlib;
+ struct mach_o_fvmlib_command_external raw;
+ unsigned int nameoff;
+
+ if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
+ || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
+ return -1;
+
+ nameoff = bfd_h_get_32 (abfd, raw.name);
+ fvm->minor_version = bfd_h_get_32 (abfd, raw.minor_version);
+ fvm->header_addr = bfd_h_get_32 (abfd, raw.header_addr);
+
+ fvm->name_offset = command->offset + nameoff;
+ fvm->name_len = command->len - nameoff;
+ fvm->name_str = bfd_alloc (abfd, fvm->name_len);
+ if (fvm->name_str == NULL)
+ return -1;
+ if (bfd_seek (abfd, fvm->name_offset, SEEK_SET) != 0
+ || bfd_bread (fvm->name_str, fvm->name_len, abfd) != fvm->name_len)
+ return -1;
+ return 0;
+}
+
static int
bfd_mach_o_read_thread (bfd *abfd, bfd_mach_o_load_command *command)
{
return TRUE;
}
+static bfd_boolean
+bfd_mach_o_read_encryption_info (bfd *abfd, bfd_mach_o_load_command *command)
+{
+ bfd_mach_o_encryption_info_command *cmd = &command->command.encryption_info;
+ struct mach_o_encryption_info_command_external raw;
+
+ if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
+ || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+
+ cmd->cryptoff = bfd_get_32 (abfd, raw.cryptoff);
+ cmd->cryptsize = bfd_get_32 (abfd, raw.cryptsize);
+ cmd->cryptid = bfd_get_32 (abfd, raw.cryptid);
+ return TRUE;
+}
+
+static bfd_boolean
+bfd_mach_o_read_main (bfd *abfd, bfd_mach_o_load_command *command)
+{
+ bfd_mach_o_main_command *cmd = &command->command.main;
+ struct mach_o_entry_point_command_external raw;
+
+ if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
+ || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+
+ cmd->entryoff = bfd_get_64 (abfd, raw.entryoff);
+ cmd->stacksize = bfd_get_64 (abfd, raw.stacksize);
+ return TRUE;
+}
+
+static bfd_boolean
+bfd_mach_o_read_source_version (bfd *abfd, bfd_mach_o_load_command *command)
+{
+ bfd_mach_o_source_version_command *cmd = &command->command.source_version;
+ struct mach_o_source_version_command_external raw;
+ bfd_uint64_t ver;
+
+ if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0
+ || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw))
+ return FALSE;
+
+ ver = bfd_get_64 (abfd, raw.version);
+ /* Note: we use a serie of shift to avoid shift > 32 (for which gcc
+ generates warnings) in case of the host doesn't support 64 bit
+ integers. */
+ cmd->e = ver & 0x3ff;
+ ver >>= 10;
+ cmd->d = ver & 0x3ff;
+ ver >>= 10;
+ cmd->c = ver & 0x3ff;
+ ver >>= 10;
+ cmd->b = ver & 0x3ff;
+ ver >>= 10;
+ cmd->a = ver & 0xffffff;
+ return TRUE;
+}
+
static int
bfd_mach_o_read_segment (bfd *abfd,
bfd_mach_o_load_command *command,
break;
case BFD_MACH_O_LC_LOADFVMLIB:
case BFD_MACH_O_LC_IDFVMLIB:
+ if (bfd_mach_o_read_fvmlib (abfd, command) != 0)
+ return -1;
+ break;
case BFD_MACH_O_LC_IDENT:
case BFD_MACH_O_LC_FVMFILE:
case BFD_MACH_O_LC_PREPAGE:
case BFD_MACH_O_LC_CODE_SIGNATURE:
case BFD_MACH_O_LC_SEGMENT_SPLIT_INFO:
case BFD_MACH_O_LC_FUNCTION_STARTS:
+ case BFD_MACH_O_LC_DATA_IN_CODE:
+ case BFD_MACH_O_LC_DYLIB_CODE_SIGN_DRS:
if (bfd_mach_o_read_linkedit (abfd, command) != 0)
return -1;
break;
+ case BFD_MACH_O_LC_ENCRYPTION_INFO:
+ if (!bfd_mach_o_read_encryption_info (abfd, command))
+ return -1;
+ break;
case BFD_MACH_O_LC_DYLD_INFO:
if (bfd_mach_o_read_dyld_info (abfd, command) != 0)
return -1;
if (!bfd_mach_o_read_version_min (abfd, command))
return -1;
break;
+ case BFD_MACH_O_LC_MAIN:
+ if (!bfd_mach_o_read_main (abfd, command))
+ return -1;
+ break;
+ case BFD_MACH_O_LC_SOURCE_VERSION:
+ if (!bfd_mach_o_read_source_version (abfd, command))
+ return -1;
+ break;
default:
- (*_bfd_error_handler)(_("%B: unable to read unknown load command 0x%lx"),
+ (*_bfd_error_handler)(_("%B: unknown load command 0x%lx"),
abfd, (unsigned long) command->type);
break;
}
if (header.cputype != cputype)
goto wrong;
}
- else
- {
- switch (header.cputype)
- {
- case BFD_MACH_O_CPU_TYPE_I386:
- /* Handled by mach-o-i386 */
- goto wrong;
- default:
- break;
- }
- }
+
if (filetype)
{
if (header.filetype != filetype)
return NULL;
}
+/* Set the filename for a fat binary member ABFD, whose bfd architecture is
+ ARCH_TYPE/ARCH_SUBTYPE and corresponding entry in header is ENTRY.
+ Set arelt_data and origin fields too. */
+
+static void
+bfd_mach_o_fat_member_init (bfd *abfd,
+ enum bfd_architecture arch_type,
+ unsigned long arch_subtype,
+ mach_o_fat_archentry *entry)
+{
+ struct areltdata *areltdata;
+ /* Create the member filename. Use ARCH_NAME. */
+ const bfd_arch_info_type *ap = bfd_lookup_arch (arch_type, arch_subtype);
+
+ if (ap)
+ {
+ /* Use the architecture name if known. */
+ abfd->filename = ap->printable_name;
+ }
+ else
+ {
+ /* Forge a uniq id. */
+ const size_t namelen = 2 + 8 + 1 + 2 + 8 + 1;
+ char *name = bfd_alloc (abfd, namelen);
+ snprintf (name, namelen, "0x%lx-0x%lx",
+ entry->cputype, entry->cpusubtype);
+ abfd->filename = name;
+ }
+
+ areltdata = bfd_zmalloc (sizeof (struct areltdata));
+ areltdata->parsed_size = entry->size;
+ abfd->arelt_data = areltdata;
+ abfd->iostream = NULL;
+ abfd->origin = entry->offset;
+}
+
bfd *
bfd_mach_o_openr_next_archived_file (bfd *archive, bfd *prev)
{
/* Find index of previous entry. */
if (prev == NULL)
- i = 0; /* Start at first one. */
+ {
+ /* Start at first one. */
+ i = 0;
+ }
else
{
+ /* Find index of PREV. */
for (i = 0; i < adata->nfat_arch; i++)
{
if (adata->archentries[i].offset == prev->origin)
bfd_set_error (bfd_error_bad_value);
return NULL;
}
- i++; /* Get next entry. */
- }
+
+ /* Get next entry. */
+ i++;
+ }
if (i >= adata->nfat_arch)
{
if (nbfd == NULL)
return NULL;
- nbfd->origin = entry->offset;
-
bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype,
&arch_type, &arch_subtype);
- /* Create the member filename. Use ARCH_NAME. */
- nbfd->filename = bfd_printable_arch_mach (arch_type, arch_subtype);
- nbfd->iostream = NULL;
+ bfd_mach_o_fat_member_init (nbfd, arch_type, arch_subtype, entry);
+
bfd_set_arch_mach (nbfd, arch_type, arch_subtype);
return nbfd;
}
+/* Analogous to stat call. */
+
+static int
+bfd_mach_o_fat_stat_arch_elt (bfd *abfd, struct stat *buf)
+{
+ if (abfd->arelt_data == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
+
+ buf->st_mtime = 0;
+ buf->st_uid = 0;
+ buf->st_gid = 0;
+ buf->st_mode = 0644;
+ buf->st_size = arelt_size (abfd);
+
+ return 0;
+}
+
/* If ABFD format is FORMAT and architecture is ARCH, return it.
If ABFD is a fat image containing a member that corresponds to FORMAT
and ARCH, returns it.
In other case, returns NULL.
This function allows transparent uses of fat images. */
+
bfd *
bfd_mach_o_fat_extract (bfd *abfd,
bfd_format format,
if (res == NULL)
return NULL;
- res->origin = e->offset;
-
- res->filename = bfd_printable_arch_mach (cpu_type, cpu_subtype);
- res->iostream = NULL;
+ bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e);
if (bfd_check_format (res, format))
{
}
}
+/* The following two tables should be kept, as far as possible, in order of
+ most frequently used entries to optimize their use from gas. */
+
const bfd_mach_o_xlat_name bfd_mach_o_section_type_name[] =
{
{ "regular", BFD_MACH_O_S_REGULAR},
+ { "coalesced", BFD_MACH_O_S_COALESCED},
{ "zerofill", BFD_MACH_O_S_ZEROFILL},
{ "cstring_literals", BFD_MACH_O_S_CSTRING_LITERALS},
{ "4byte_literals", BFD_MACH_O_S_4BYTE_LITERALS},
{ "8byte_literals", BFD_MACH_O_S_8BYTE_LITERALS},
+ { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
{ "literal_pointers", BFD_MACH_O_S_LITERAL_POINTERS},
- { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
- { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
- { "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
{ "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS},
{ "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS},
- { "coalesced", BFD_MACH_O_S_COALESCED},
{ "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL},
{ "interposing", BFD_MACH_O_S_INTERPOSING},
- { "16byte_literals", BFD_MACH_O_S_16BYTE_LITERALS},
{ "dtrace_dof", BFD_MACH_O_S_DTRACE_DOF},
+ { "non_lazy_symbol_pointers", BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS},
+ { "lazy_symbol_pointers", BFD_MACH_O_S_LAZY_SYMBOL_POINTERS},
{ "symbol_stubs", BFD_MACH_O_S_SYMBOL_STUBS},
{ "lazy_dylib_symbol_pointers", BFD_MACH_O_S_LAZY_DYLIB_SYMBOL_POINTERS},
{ NULL, 0}
const bfd_mach_o_xlat_name bfd_mach_o_section_attribute_name[] =
{
+ { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
+ { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
{ "loc_reloc", BFD_MACH_O_S_ATTR_LOC_RELOC },
{ "ext_reloc", BFD_MACH_O_S_ATTR_EXT_RELOC },
- { "some_instructions", BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS },
{ "debug", BFD_MACH_O_S_ATTR_DEBUG },
- { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
{ "live_support", BFD_MACH_O_S_ATTR_LIVE_SUPPORT },
{ "no_dead_strip", BFD_MACH_O_S_ATTR_NO_DEAD_STRIP },
{ "strip_static_syms", BFD_MACH_O_S_ATTR_STRIP_STATIC_SYMS },
{ "no_toc", BFD_MACH_O_S_ATTR_NO_TOC },
- { "pure_instructions", BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS },
{ "self_modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
+ { "modifying_code", BFD_MACH_O_S_SELF_MODIFYING_CODE },
{ NULL, 0}
};
/* Get the section type from NAME. Return 256 if NAME is unknown. */
unsigned int
-bfd_mach_o_get_section_type_from_name (const char *name)
+bfd_mach_o_get_section_type_from_name (bfd *abfd, const char *name)
{
const bfd_mach_o_xlat_name *x;
+ bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd);
for (x = bfd_mach_o_section_type_name; x->name; x++)
if (strcmp (x->name, name) == 0)
- return x->val;
+ {
+ /* We found it... does the target support it? */
+ if (bed->bfd_mach_o_section_type_valid_for_target == NULL
+ || bed->bfd_mach_o_section_type_valid_for_target (x->val))
+ return x->val; /* OK. */
+ else
+ break; /* Not supported. */
+ }
/* Maximum section ID = 0xff. */
return 256;
}
return 0;
}
+static bfd_mach_o_uuid_command *
+bfd_mach_o_lookup_uuid_command (bfd *abfd)
+{
+ bfd_mach_o_load_command *uuid_cmd;
+ int ncmd = bfd_mach_o_lookup_command (abfd, BFD_MACH_O_LC_UUID, &uuid_cmd);
+ if (ncmd != 1)
+ return FALSE;
+ return &uuid_cmd->command.uuid;
+}
+
+/* Return true if ABFD is a dSYM file and its UUID matches UUID_CMD. */
+
+static bfd_boolean
+bfd_mach_o_dsym_for_uuid_p (bfd *abfd, const bfd_mach_o_uuid_command *uuid_cmd)
+{
+ bfd_mach_o_uuid_command *dsym_uuid_cmd;
+
+ BFD_ASSERT (abfd);
+ BFD_ASSERT (uuid_cmd);
+
+ if (!bfd_check_format (abfd, bfd_object))
+ return FALSE;
+
+ if (bfd_get_flavour (abfd) != bfd_target_mach_o_flavour
+ || bfd_mach_o_get_data (abfd) == NULL
+ || bfd_mach_o_get_data (abfd)->header.filetype != BFD_MACH_O_MH_DSYM)
+ return FALSE;
+
+ dsym_uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
+ if (dsym_uuid_cmd == NULL)
+ return FALSE;
+
+ if (memcmp (uuid_cmd->uuid, dsym_uuid_cmd->uuid,
+ sizeof (uuid_cmd->uuid)) != 0)
+ return FALSE;
+
+ return TRUE;
+}
+
+/* Find a BFD in DSYM_FILENAME which matches ARCH and UUID_CMD.
+ The caller is responsible for closing the returned BFD object and
+ its my_archive if the returned BFD is in a fat dSYM. */
+
+static bfd *
+bfd_mach_o_find_dsym (const char *dsym_filename,
+ const bfd_mach_o_uuid_command *uuid_cmd,
+ const bfd_arch_info_type *arch)
+{
+ bfd *base_dsym_bfd, *dsym_bfd;
+
+ BFD_ASSERT (uuid_cmd);
+
+ base_dsym_bfd = bfd_openr (dsym_filename, NULL);
+ if (base_dsym_bfd == NULL)
+ return NULL;
+
+ dsym_bfd = bfd_mach_o_fat_extract (base_dsym_bfd, bfd_object, arch);
+ if (bfd_mach_o_dsym_for_uuid_p (dsym_bfd, uuid_cmd))
+ return dsym_bfd;
+
+ bfd_close (dsym_bfd);
+ if (base_dsym_bfd != dsym_bfd)
+ bfd_close (base_dsym_bfd);
+
+ return NULL;
+}
+
+/* Return a BFD created from a dSYM file for ABFD.
+ The caller is responsible for closing the returned BFD object, its
+ filename, and its my_archive if the returned BFD is in a fat dSYM. */
+
+static bfd *
+bfd_mach_o_follow_dsym (bfd *abfd)
+{
+ char *dsym_filename;
+ bfd_mach_o_uuid_command *uuid_cmd;
+ bfd *dsym_bfd, *base_bfd = abfd;
+ const char *base_basename;
+
+ if (abfd == NULL || bfd_get_flavour (abfd) != bfd_target_mach_o_flavour)
+ return NULL;
+
+ if (abfd->my_archive)
+ base_bfd = abfd->my_archive;
+ /* BFD may have been opened from a stream. */
+ if (base_bfd->filename == NULL)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+ base_basename = lbasename (base_bfd->filename);
+
+ uuid_cmd = bfd_mach_o_lookup_uuid_command (abfd);
+ if (uuid_cmd == NULL)
+ return NULL;
+
+ /* TODO: We assume the DWARF file has the same as the binary's.
+ It seems apple's GDB checks all files in the dSYM bundle directory.
+ http://opensource.apple.com/source/gdb/gdb-1708/src/gdb/macosx/macosx-tdep.c
+ */
+ dsym_filename = (char *)bfd_malloc (strlen (base_bfd->filename)
+ + strlen (dsym_subdir) + 1
+ + strlen (base_basename) + 1);
+ sprintf (dsym_filename, "%s%s/%s",
+ base_bfd->filename, dsym_subdir, base_basename);
+
+ dsym_bfd = bfd_mach_o_find_dsym (dsym_filename, uuid_cmd,
+ bfd_get_arch_info (abfd));
+ if (dsym_bfd == NULL)
+ free (dsym_filename);
+
+ return dsym_bfd;
+}
+
bfd_boolean
bfd_mach_o_find_nearest_line (bfd *abfd,
asection *section,
unsigned int *line_ptr)
{
bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd);
- /* TODO: Handle executables and dylibs by using dSYMs. */
- if (mdata->header.filetype != BFD_MACH_O_MH_OBJECT)
+ if (mdata == NULL)
return FALSE;
+ switch (mdata->header.filetype)
+ {
+ case BFD_MACH_O_MH_OBJECT:
+ break;
+ case BFD_MACH_O_MH_EXECUTE:
+ case BFD_MACH_O_MH_DYLIB:
+ case BFD_MACH_O_MH_BUNDLE:
+ case BFD_MACH_O_MH_KEXT_BUNDLE:
+ if (mdata->dwarf2_find_line_info == NULL)
+ {
+ mdata->dsym_bfd = bfd_mach_o_follow_dsym (abfd);
+ /* When we couldn't find dSYM for this binary, we look for
+ the debug information in the binary itself. In this way,
+ we won't try finding separated dSYM again because
+ mdata->dwarf2_find_line_info will be filled. */
+ if (! mdata->dsym_bfd)
+ break;
+ if (! _bfd_dwarf2_slurp_debug_info (abfd, mdata->dsym_bfd,
+ dwarf_debug_sections, symbols,
+ &mdata->dwarf2_find_line_info))
+ return FALSE;
+ }
+ break;
+ default:
+ return FALSE;
+ }
if (_bfd_dwarf2_find_nearest_line (abfd, dwarf_debug_sections,
section, symbols, offset,
filename_ptr, functionname_ptr,
- line_ptr, 0,
+ line_ptr, NULL, 0,
&mdata->dwarf2_find_line_info))
return TRUE;
return FALSE;
{
_bfd_dwarf2_cleanup_debug_info (abfd, &mdata->dwarf2_find_line_info);
bfd_mach_o_free_cached_info (abfd);
+ if (mdata->dsym_bfd != NULL)
+ {
+ bfd *fat_bfd = mdata->dsym_bfd->my_archive;
+ char *dsym_filename = (char *)(fat_bfd
+ ? fat_bfd->filename
+ : mdata->dsym_bfd->filename);
+ bfd_close (mdata->dsym_bfd);
+ mdata->dsym_bfd = NULL;
+ if (fat_bfd)
+ bfd_close (fat_bfd);
+ free (dsym_filename);
+ }
}
+ if (bfd_get_format (abfd) == bfd_archive
+ && abfd->xvec == &mach_o_fat_vec)
+ return TRUE;
return _bfd_generic_close_and_cleanup (abfd);
}
#define bfd_mach_o_swap_reloc_out NULL
#define bfd_mach_o_print_thread NULL
#define bfd_mach_o_tgt_seg_table NULL
+#define bfd_mach_o_section_type_valid_for_tgt NULL
#define TARGET_NAME mach_o_be_vec
#define TARGET_STRING "mach-o-be"
#define TARGET_ARCHITECTURE bfd_arch_unknown
#define TARGET_BIG_ENDIAN 1
#define TARGET_ARCHIVE 0
+#define TARGET_PRIORITY 1
#include "mach-o-target.c"
#undef TARGET_NAME
#undef TARGET_ARCHITECTURE
#undef TARGET_BIG_ENDIAN
#undef TARGET_ARCHIVE
+#undef TARGET_PRIORITY
#define TARGET_NAME mach_o_le_vec
#define TARGET_STRING "mach-o-le"
#define TARGET_ARCHITECTURE bfd_arch_unknown
#define TARGET_BIG_ENDIAN 0
#define TARGET_ARCHIVE 0
+#define TARGET_PRIORITY 1
#include "mach-o-target.c"
#undef TARGET_ARCHITECTURE
#undef TARGET_BIG_ENDIAN
#undef TARGET_ARCHIVE
+#undef TARGET_PRIORITY
/* Not yet handled: creating an archive. */
#define bfd_mach_o_mkarchive _bfd_noarchive_mkarchive
#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_generic_stat_arch_elt bfd_mach_o_fat_stat_arch_elt
#define bfd_mach_o_update_armap_timestamp _bfd_noarchive_update_armap_timestamp
#define TARGET_NAME mach_o_fat_vec
#define TARGET_ARCHITECTURE bfd_arch_unknown
#define TARGET_BIG_ENDIAN 1
#define TARGET_ARCHIVE 1
+#define TARGET_PRIORITY 0
#include "mach-o-target.c"
#undef TARGET_ARCHITECTURE
#undef TARGET_BIG_ENDIAN
#undef TARGET_ARCHIVE
+#undef TARGET_PRIORITY
projects / deliverable / binutils-gdb.git / blobdiff