diff options
Diffstat (limited to 'binutils-2.25/bfd/mach-o.c')
| -rw-r--r-- | binutils-2.25/bfd/mach-o.c | 5028 |
1 files changed, 5028 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/mach-o.c b/binutils-2.25/bfd/mach-o.c new file mode 100644 index 00000000..32e48ac3 --- /dev/null +++ b/binutils-2.25/bfd/mach-o.c @@ -0,0 +1,5028 @@ +/* Mach-O support for BFD. + Copyright 1999-2013 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 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#include "sysdep.h" +#include "mach-o.h" +#include "bfd.h" +#include "libbfd.h" +#include "libiberty.h" +#include "aout/stab_gnu.h" +#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 +#define bfd_mach_o_mkobject bfd_mach_o_gen_mkobject + +#define FILE_ALIGN(off, algn) \ + (((off) + ((file_ptr) 1 << (algn)) - 1) & ((file_ptr) -1 << (algn))) + +unsigned int +bfd_mach_o_version (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = NULL; + + BFD_ASSERT (bfd_mach_o_valid (abfd)); + mdata = bfd_mach_o_get_data (abfd); + + return mdata->header.version; +} + +bfd_boolean +bfd_mach_o_valid (bfd *abfd) +{ + if (abfd == NULL || abfd->xvec == NULL) + return FALSE; + + if (abfd->xvec->flavour != bfd_target_mach_o_flavour) + return FALSE; + + if (bfd_mach_o_get_data (abfd) == NULL) + return FALSE; + return TRUE; +} + +static INLINE bfd_boolean +mach_o_wide_p (bfd_mach_o_header *header) +{ + switch (header->version) + { + case 1: + return FALSE; + case 2: + return TRUE; + default: + BFD_FAIL (); + return FALSE; + } +} + +static INLINE bfd_boolean +bfd_mach_o_wide_p (bfd *abfd) +{ + return mach_o_wide_p (&bfd_mach_o_get_data (abfd)->header); +} + +/* Tables to translate well known Mach-O segment/section names to bfd + names. Use of canonical names (such as .text or .debug_frame) is required + by gdb. */ + +/* __TEXT Segment. */ +static const mach_o_section_name_xlat text_section_names_xlat[] = + { + { ".text", "__text", + SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS, 0}, + { ".const", "__const", + SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".static_const", "__static_const", + SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".cstring", "__cstring", + SEC_READONLY | SEC_DATA | SEC_LOAD | SEC_MERGE | SEC_STRINGS, + BFD_MACH_O_S_CSTRING_LITERALS, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".literal4", "__literal4", + SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_4BYTE_LITERALS, + BFD_MACH_O_S_ATTR_NONE, 2}, + { ".literal8", "__literal8", + SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_8BYTE_LITERALS, + BFD_MACH_O_S_ATTR_NONE, 3}, + { ".literal16", "__literal16", + SEC_READONLY | SEC_DATA | SEC_LOAD, BFD_MACH_O_S_16BYTE_LITERALS, + BFD_MACH_O_S_ATTR_NONE, 4}, + { ".constructor", "__constructor", + SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".destructor", "__destructor", + SEC_CODE | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".eh_frame", "__eh_frame", + 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, 2}, + { NULL, NULL, 0, 0, 0, 0} + }; + +/* __DATA Segment. */ +static const mach_o_section_name_xlat data_section_names_xlat[] = + { + { ".data", "__data", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".bss", "__bss", + SEC_NO_FLAGS, BFD_MACH_O_S_ZEROFILL, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".const_data", "__const", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".static_data", "__static_data", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".mod_init_func", "__mod_init_func", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS, + BFD_MACH_O_S_ATTR_NONE, 2}, + { ".mod_term_func", "__mod_term_func", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS, + BFD_MACH_O_S_ATTR_NONE, 2}, + { ".dyld", "__dyld", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 0}, + { ".cfstring", "__cfstring", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NONE, 2}, + { NULL, NULL, 0, 0, 0, 0} + }; + +/* __DWARF Segment. */ +static const mach_o_section_name_xlat dwarf_section_names_xlat[] = + { + { ".debug_frame", "__debug_frame", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_info", "__debug_info", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_abbrev", "__debug_abbrev", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_aranges", "__debug_aranges", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_macinfo", "__debug_macinfo", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_line", "__debug_line", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_loc", "__debug_loc", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_pubnames", "__debug_pubnames", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_pubtypes", "__debug_pubtypes", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_str", "__debug_str", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_ranges", "__debug_ranges", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_macro", "__debug_macro", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { ".debug_gdb_scripts", "__debug_gdb_scri", + SEC_DEBUGGING, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_DEBUG, 0}, + { NULL, NULL, 0, 0, 0, 0} + }; + +/* __OBJC Segment. */ +static const mach_o_section_name_xlat objc_section_names_xlat[] = + { + { ".objc_class", "__class", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_meta_class", "__meta_class", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_cat_cls_meth", "__cat_cls_meth", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_cat_inst_meth", "__cat_inst_meth", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_protocol", "__protocol", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_string_object", "__string_object", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_cls_meth", "__cls_meth", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_inst_meth", "__inst_meth", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_cls_refs", "__cls_refs", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_message_refs", "__message_refs", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_LITERAL_POINTERS, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_symbols", "__symbols", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_category", "__category", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_class_vars", "__class_vars", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_instance_vars", "__instance_vars", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_module_info", "__module_info", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_selector_strs", "__selector_strs", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_CSTRING_LITERALS, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_image_info", "__image_info", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc_selector_fixup", "__sel_fixup", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + /* Objc V1 */ + { ".objc1_class_ext", "__class_ext", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc1_property_list", "__property", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { ".objc1_protocol_ext", "__protocol_ext", + SEC_DATA | SEC_LOAD, BFD_MACH_O_S_REGULAR, + BFD_MACH_O_S_ATTR_NO_DEAD_STRIP, 0}, + { NULL, NULL, 0, 0, 0, 0} + }; + +static const mach_o_segment_name_xlat segsec_names_xlat[] = + { + { "__TEXT", text_section_names_xlat }, + { "__DATA", data_section_names_xlat }, + { "__DWARF", dwarf_section_names_xlat }, + { "__OBJC", objc_section_names_xlat }, + { 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. */ + +/* Fetch the translation from a Mach-O section designation (segment, section) + as a bfd short name, if one exists. Otherwise return NULL. + + Allow the segment and section names to be unterminated 16 byte arrays. */ + +const mach_o_section_name_xlat * +bfd_mach_o_section_data_for_mach_sect (bfd *abfd, const char *segname, + const char *sectname) +{ + const struct mach_o_segment_name_xlat *seg; + const mach_o_section_name_xlat *sec; + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + + /* First try any target-specific translations defined... */ + if (bed->segsec_names_xlat) + for (seg = bed->segsec_names_xlat; seg->segname; seg++) + if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) + for (sec = seg->sections; sec->mach_o_name; sec++) + if (strncmp (sec->mach_o_name, sectname, + BFD_MACH_O_SECTNAME_SIZE) == 0) + return sec; + + /* ... and then the Mach-O generic ones. */ + for (seg = segsec_names_xlat; seg->segname; seg++) + if (strncmp (seg->segname, segname, BFD_MACH_O_SEGNAME_SIZE) == 0) + for (sec = seg->sections; sec->mach_o_name; sec++) + if (strncmp (sec->mach_o_name, sectname, + BFD_MACH_O_SECTNAME_SIZE) == 0) + return sec; + + return NULL; +} + +/* If the bfd_name for this section is a 'canonical' form for which we + know the Mach-O data, return the segment name and the data for the + Mach-O equivalent. Otherwise return NULL. */ + +const mach_o_section_name_xlat * +bfd_mach_o_section_data_for_bfd_name (bfd *abfd, const char *bfd_name, + const char **segname) +{ + const struct mach_o_segment_name_xlat *seg; + const mach_o_section_name_xlat *sec; + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + *segname = NULL; + + if (bfd_name[0] != '.') + return NULL; + + /* First try any target-specific translations defined... */ + if (bed->segsec_names_xlat) + for (seg = bed->segsec_names_xlat; seg->segname; seg++) + for (sec = seg->sections; sec->bfd_name; sec++) + if (strcmp (bfd_name, sec->bfd_name) == 0) + { + *segname = seg->segname; + return sec; + } + + /* ... and then the Mach-O generic ones. */ + for (seg = segsec_names_xlat; seg->segname; seg++) + for (sec = seg->sections; sec->bfd_name; sec++) + if (strcmp (bfd_name, sec->bfd_name) == 0) + { + *segname = seg->segname; + return sec; + } + + return NULL; +} + +/* Convert Mach-O section name to BFD. + + Try to use standard/canonical names, for which we have tables including + default flag settings - which are returned. Otherwise forge a new name + in the form "<segmentname>.<sectionname>" this will be prefixed with + LC_SEGMENT. if the segment name does not begin with an underscore. + + SEGNAME and SECTNAME are 16 byte arrays (they do not need to be NUL- + terminated if the name length is exactly 16 bytes - but must be if the name + length is less than 16 characters). */ + +void +bfd_mach_o_convert_section_name_to_bfd (bfd *abfd, const char *segname, + const char *secname, const char **name, + flagword *flags) +{ + const mach_o_section_name_xlat *xlat; + char *res; + unsigned int len; + const char *pfx = ""; + + *name = NULL; + *flags = SEC_NO_FLAGS; + + /* First search for a canonical name... + xlat will be non-null if there is an entry for segname, secname. */ + xlat = bfd_mach_o_section_data_for_mach_sect (abfd, segname, secname); + if (xlat) + { + len = strlen (xlat->bfd_name); + res = bfd_alloc (abfd, len+1); + if (res == NULL) + return; + memcpy (res, xlat->bfd_name, len+1); + *name = res; + *flags = xlat->bfd_flags; + return; + } + + /* ... else we make up a bfd name from the segment concatenated with the + section. */ + + len = 16 + 1 + 16 + 1; + + /* Put "LC_SEGMENT." prefix if the segment name is weird (ie doesn't start + with an underscore. */ + if (segname[0] != '_') + { + static const char seg_pfx[] = "LC_SEGMENT."; + + pfx = seg_pfx; + len += sizeof (seg_pfx) - 1; + } + + res = bfd_alloc (abfd, len); + if (res == NULL) + return; + snprintf (res, len, "%s%.16s.%.16s", pfx, segname, secname); + *name = res; +} + +/* Convert a bfd section name to a Mach-O segment + section name. + + If the name is a canonical one for which we have a Darwin match + return the translation table - which contains defaults for flags, + type, attribute and default alignment data. + + Otherwise, expand the bfd_name (assumed to be in the form + "[LC_SEGMENT.]<segmentname>.<sectionname>") and return NULL. */ + +static const mach_o_section_name_xlat * +bfd_mach_o_convert_section_name_to_mach_o (bfd *abfd ATTRIBUTE_UNUSED, + asection *sect, + bfd_mach_o_section *section) +{ + const mach_o_section_name_xlat *xlat; + const char *name = bfd_get_section_name (abfd, sect); + const char *segname; + const char *dot; + unsigned int len; + unsigned int seglen; + unsigned int seclen; + + memset (section->segname, 0, BFD_MACH_O_SEGNAME_SIZE + 1); + memset (section->sectname, 0, BFD_MACH_O_SECTNAME_SIZE + 1); + + /* See if is a canonical name ... */ + xlat = bfd_mach_o_section_data_for_bfd_name (abfd, name, &segname); + if (xlat) + { + strcpy (section->segname, segname); + strcpy (section->sectname, xlat->mach_o_name); + return xlat; + } + + /* .. else we convert our constructed one back to Mach-O. + Strip LC_SEGMENT. prefix, if present. */ + if (strncmp (name, "LC_SEGMENT.", 11) == 0) + name += 11; + + /* Find a dot. */ + dot = strchr (name, '.'); + len = strlen (name); + + /* Try to split name into segment and section names. */ + if (dot && dot != name) + { + seglen = dot - name; + seclen = len - (dot + 1 - name); + + if (seglen < 16 && seclen < 16) + { + memcpy (section->segname, name, seglen); + section->segname[seglen] = 0; + memcpy (section->sectname, dot + 1, seclen); + section->sectname[seclen] = 0; + return NULL; + } + } + + /* The segment and section names are both missing - don't make them + into dots. */ + if (dot && dot == name) + return NULL; + + /* Just duplicate the name into both segment and section. */ + if (len > 16) + len = 16; + memcpy (section->segname, name, len); + section->segname[len] = 0; + memcpy (section->sectname, name, len); + section->sectname[len] = 0; + return NULL; +} + +/* Return the size of an entry for section SEC. + Must be called only for symbol pointer section and symbol stubs + sections. */ + +unsigned int +bfd_mach_o_section_get_entry_size (bfd *abfd, bfd_mach_o_section *sec) +{ + 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: + return bfd_mach_o_wide_p (abfd) ? 8 : 4; + case BFD_MACH_O_S_SYMBOL_STUBS: + return sec->reserved2; + default: + BFD_FAIL (); + return 0; + } +} + +/* Return the number of indirect symbols for a section. + Must be called only for symbol pointer section and symbol stubs + sections. */ + +unsigned int +bfd_mach_o_section_get_nbr_indirect (bfd *abfd, bfd_mach_o_section *sec) +{ + unsigned int elsz; + + elsz = bfd_mach_o_section_get_entry_size (abfd, sec); + if (elsz == 0) + return 0; + else + return sec->size / elsz; +} + + +/* Copy any private info we understand from the input symbol + to the output symbol. */ + +bfd_boolean +bfd_mach_o_bfd_copy_private_symbol_data (bfd *ibfd ATTRIBUTE_UNUSED, + asymbol *isymbol, + bfd *obfd 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; +} + +/* Copy any private info we understand from the input section + to the output section. */ + +bfd_boolean +bfd_mach_o_bfd_copy_private_section_data (bfd *ibfd ATTRIBUTE_UNUSED, + asection *isection, + bfd *obfd ATTRIBUTE_UNUSED, + asection *osection) +{ + if (osection->used_by_bfd == NULL) + osection->used_by_bfd = isection->used_by_bfd; + else + if (isection->used_by_bfd != NULL) + memcpy (osection->used_by_bfd, isection->used_by_bfd, + sizeof (bfd_mach_o_section)); + + if (osection->used_by_bfd != NULL) + ((bfd_mach_o_section *)osection->used_by_bfd)->bfdsection = osection; + + return TRUE; +} + +/* Copy any private info we understand from the input bfd + to the output bfd. */ + +bfd_boolean +bfd_mach_o_bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd) +{ + if (bfd_get_flavour (ibfd) != bfd_target_mach_o_flavour + || bfd_get_flavour (obfd) != bfd_target_mach_o_flavour) + return TRUE; + + BFD_ASSERT (bfd_mach_o_valid (ibfd)); + BFD_ASSERT (bfd_mach_o_valid (obfd)); + + /* FIXME: copy commands. */ + + return TRUE; +} + +/* This allows us to set up to 32 bits of flags (unless we invent some + fiendish scheme to subdivide). For now, we'll just set the file flags + without error checking - just overwrite. */ + +bfd_boolean +bfd_mach_o_bfd_set_private_flags (bfd *abfd, flagword flags) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + + if (!mdata) + return FALSE; + + mdata->header.flags = flags; + return TRUE; +} + +/* Count the total number of symbols. */ + +static long +bfd_mach_o_count_symbols (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + + if (mdata->symtab == NULL) + return 0; + return mdata->symtab->nsyms; +} + +long +bfd_mach_o_get_symtab_upper_bound (bfd *abfd) +{ + long nsyms = bfd_mach_o_count_symbols (abfd); + + return ((nsyms + 1) * sizeof (asymbol *)); +} + +long +bfd_mach_o_canonicalize_symtab (bfd *abfd, asymbol **alocation) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + long nsyms = bfd_mach_o_count_symbols (abfd); + bfd_mach_o_symtab_command *sym = mdata->symtab; + unsigned long j; + + if (nsyms < 0) + return nsyms; + + if (nsyms == 0) + { + /* Do not try to read symbols if there are none. */ + alocation[0] = NULL; + return 0; + } + + if (!bfd_mach_o_read_symtab_symbols (abfd)) + { + (*_bfd_error_handler) + (_("bfd_mach_o_canonicalize_symtab: unable to load symbols")); + return 0; + } + + BFD_ASSERT (sym->symbols != NULL); + + for (j = 0; j < sym->nsyms; j++) + alocation[j] = &sym->symbols[j].symbol; + + alocation[j] = NULL; + + return nsyms; +} + +/* Create synthetic symbols for indirect symbols. */ + +long +bfd_mach_o_get_synthetic_symtab (bfd *abfd, + long symcount ATTRIBUTE_UNUSED, + asymbol **syms ATTRIBUTE_UNUSED, + long dynsymcount ATTRIBUTE_UNUSED, + asymbol **dynsyms ATTRIBUTE_UNUSED, + asymbol **ret) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; + bfd_mach_o_symtab_command *symtab = mdata->symtab; + asymbol *s; + unsigned long count, i, j, n; + size_t size; + char *names; + char *nul_name; + + *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 ("$stub"); + } + + s = *ret = (asymbol *) bfd_malloc (size); + if (s == NULL) + return -1; + names = (char *) (s + count); + nul_name = names; + *names++ = 0; + + n = 0; + for (i = 0; i < mdata->nsects; i++) + { + bfd_mach_o_section *sec = mdata->sections[i]; + unsigned int first, last; + bfd_vma addr; + bfd_vma entry_size; + + switch (sec->flags & BFD_MACH_O_SECTION_TYPE_MASK) + { + case BFD_MACH_O_S_NON_LAZY_SYMBOL_POINTERS: + case BFD_MACH_O_S_LAZY_SYMBOL_POINTERS: + case BFD_MACH_O_S_SYMBOL_STUBS: + /* Only these sections have indirect symbols. */ + first = sec->reserved1; + last = first + bfd_mach_o_section_get_nbr_indirect (abfd, sec); + addr = sec->addr; + entry_size = bfd_mach_o_section_get_entry_size (abfd, sec); + for (j = first; j < last; j++) + { + unsigned int isym = dysymtab->indirect_syms[j]; + + s->flags = BSF_GLOBAL | BSF_SYNTHETIC; + s->section = sec->bfdsection; + s->value = addr - sec->addr; + s->udata.p = NULL; + + if (isym < symtab->nsyms + && symtab->symbols[isym].symbol.name) + { + const char *sym = symtab->symbols[isym].symbol.name; + size_t len; + + s->name = names; + len = strlen (sym); + memcpy (names, sym, len); + names += len; + memcpy (names, "$stub", sizeof ("$stub")); + names += sizeof ("$stub"); + } + else + s->name = nul_name; + + addr += entry_size; + s++; + n++; + } + break; + default: + break; + } + } + + return n; +} + +void +bfd_mach_o_get_symbol_info (bfd *abfd ATTRIBUTE_UNUSED, + asymbol *symbol, + symbol_info *ret) +{ + bfd_symbol_info (symbol, ret); +} + +void +bfd_mach_o_print_symbol (bfd *abfd, + void * afile, + asymbol *symbol, + bfd_print_symbol_type how) +{ + FILE *file = (FILE *) afile; + const char *name; + bfd_mach_o_asymbol *asym = (bfd_mach_o_asymbol *)symbol; + + switch (how) + { + case bfd_print_symbol_name: + fprintf (file, "%s", symbol->name); + break; + default: + bfd_print_symbol_vandf (abfd, (void *) file, symbol); + if (asym->n_type & BFD_MACH_O_N_STAB) + name = bfd_get_stab_name (asym->n_type); + else + switch (asym->n_type & BFD_MACH_O_N_TYPE) + { + case BFD_MACH_O_N_UNDF: + if (symbol->value == 0) + name = "UND"; + else + name = "COM"; + break; + case BFD_MACH_O_N_ABS: + name = "ABS"; + break; + case BFD_MACH_O_N_INDR: + name = "INDR"; + break; + case BFD_MACH_O_N_PBUD: + name = "PBUD"; + break; + case BFD_MACH_O_N_SECT: + name = "SECT"; + break; + default: + name = "???"; + break; + } + if (name == NULL) + name = ""; + fprintf (file, " %02x %-6s %02x %04x", + asym->n_type, name, asym->n_sect, asym->n_desc); + if ((asym->n_type & BFD_MACH_O_N_STAB) == 0 + && (asym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) + fprintf (file, " [%s]", symbol->section->name); + fprintf (file, " %s", symbol->name); + } +} + +static void +bfd_mach_o_convert_architecture (bfd_mach_o_cpu_type mtype, + bfd_mach_o_cpu_subtype msubtype, + 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; + *subtype = bfd_mach_i386_i386; + break; + case BFD_MACH_O_CPU_TYPE_X86_64: + *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; + 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_POWERPC: + *type = bfd_arch_powerpc; + *subtype = bfd_mach_ppc; + break; + case BFD_MACH_O_CPU_TYPE_POWERPC_64: + *type = bfd_arch_powerpc; + *subtype = bfd_mach_ppc64; + break; + default: + *type = bfd_arch_unknown; + break; + } +} + +static bfd_boolean +bfd_mach_o_write_header (bfd *abfd, bfd_mach_o_header *header) +{ + struct mach_o_header_external raw; + unsigned int size; + + size = mach_o_wide_p (header) ? + BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; + + bfd_h_put_32 (abfd, header->magic, raw.magic); + bfd_h_put_32 (abfd, header->cputype, raw.cputype); + bfd_h_put_32 (abfd, header->cpusubtype, raw.cpusubtype); + bfd_h_put_32 (abfd, header->filetype, raw.filetype); + bfd_h_put_32 (abfd, header->ncmds, raw.ncmds); + bfd_h_put_32 (abfd, header->sizeofcmds, raw.sizeofcmds); + bfd_h_put_32 (abfd, header->flags, raw.flags); + + if (mach_o_wide_p (header)) + bfd_h_put_32 (abfd, header->reserved, raw.reserved); + + if (bfd_seek (abfd, 0, SEEK_SET) != 0 + || bfd_bwrite (&raw, size, abfd) != size) + return FALSE; + + return TRUE; +} + +static int +bfd_mach_o_write_thread (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_thread_command *cmd = &command->command.thread; + unsigned int i; + struct mach_o_thread_command_external raw; + unsigned int offset; + + BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) + || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); + + offset = 8; + for (i = 0; i < cmd->nflavours; i++) + { + BFD_ASSERT ((cmd->flavours[i].size % 4) == 0); + BFD_ASSERT (cmd->flavours[i].offset == + (command->offset + offset + BFD_MACH_O_LC_SIZE)); + + bfd_h_put_32 (abfd, cmd->flavours[i].flavour, raw.flavour); + bfd_h_put_32 (abfd, (cmd->flavours[i].size / 4), raw.count); + + if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 + || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + offset += cmd->flavours[i].size + sizeof (raw); + } + + return 0; +} + +long +bfd_mach_o_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED, + asection *asect) +{ + 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, + arelent *res, asymbol **syms) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + bfd_mach_o_reloc_info reloc; + bfd_vma addr; + asymbol **sym; + + addr = bfd_get_32 (abfd, raw->r_address); + 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, 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]; + if (symnum >= sect->addr && symnum < sect->addr + sect->size) + { + res->sym_ptr_ptr = sect->bfdsection->symbol_ptr_ptr; + res->addend = symnum - sect->addr; + break; + } + } + + /* 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_address = BFD_MACH_O_GET_SR_TYPE (addr); + res->address = BFD_MACH_O_GET_SR_ADDRESS (addr); + } + else + { + 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 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; + } + /* 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; + + /* 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; +} + +static int +bfd_mach_o_canonicalize_relocs (bfd *abfd, unsigned long filepos, + unsigned long count, + arelent *res, asymbol **syms) +{ + unsigned long i; + struct mach_o_reloc_info_external *native_relocs; + bfd_size_type native_size; + + /* Allocate and read relocs. */ + native_size = count * BFD_MACH_O_RELENT_SIZE; + native_relocs = + (struct mach_o_reloc_info_external *) bfd_malloc (native_size); + if (native_relocs == NULL) + return -1; + + if (bfd_seek (abfd, filepos, SEEK_SET) != 0 + || bfd_bread (native_relocs, native_size, abfd) != native_size) + goto err; + + for (i = 0; i < count; i++) + { + if (bfd_mach_o_canonicalize_one_reloc (abfd, &native_relocs[i], + &res[i], syms) < 0) + goto err; + } + free (native_relocs); + return i; + err: + free (native_relocs); + return -1; +} + +long +bfd_mach_o_canonicalize_reloc (bfd *abfd, asection *asect, + arelent **rels, asymbol **syms) +{ + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + unsigned long i; + arelent *res; + + if (asect->reloc_count == 0) + return 0; + + /* No need to go further if we don't know how to read relocs. */ + if (bed->_bfd_mach_o_swap_reloc_in == NULL) + return 0; + + if (asect->relocation == NULL) + { + res = bfd_malloc (asect->reloc_count * sizeof (arelent)); + if (res == NULL) + return -1; + + if (bfd_mach_o_canonicalize_relocs (abfd, asect->rel_filepos, + asect->reloc_count, res, syms) < 0) + { + free (res); + return -1; + } + asect->relocation = res; + } + + res = asect->relocation; + for (i = 0; i < asect->reloc_count; i++) + rels[i] = &res[i]; + rels[i] = NULL; + + return i; +} + +long +bfd_mach_o_get_dynamic_reloc_upper_bound (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + + if (mdata->dysymtab == NULL) + return 1; + return (mdata->dysymtab->nextrel + mdata->dysymtab->nlocrel + 1) + * sizeof (arelent *); +} + +long +bfd_mach_o_canonicalize_dynamic_reloc (bfd *abfd, arelent **rels, + struct bfd_symbol **syms) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_dysymtab_command *dysymtab = mdata->dysymtab; + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + unsigned long i; + arelent *res; + + if (dysymtab == NULL) + return 0; + if (dysymtab->nextrel == 0 && dysymtab->nlocrel == 0) + return 0; + + /* No need to go further if we don't know how to read relocs. */ + if (bed->_bfd_mach_o_swap_reloc_in == NULL) + return 0; + + if (mdata->dyn_reloc_cache == NULL) + { + res = bfd_malloc ((dysymtab->nextrel + dysymtab->nlocrel) + * sizeof (arelent)); + if (res == NULL) + return -1; + + if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->extreloff, + dysymtab->nextrel, res, syms) < 0) + { + free (res); + return -1; + } + + if (bfd_mach_o_canonicalize_relocs (abfd, dysymtab->locreloff, + dysymtab->nlocrel, + res + dysymtab->nextrel, syms) < 0) + { + free (res); + return -1; + } + + mdata->dyn_reloc_cache = res; + } + + res = mdata->dyn_reloc_cache; + for (i = 0; i < dysymtab->nextrel + dysymtab->nlocrel; i++) + rels[i] = &res[i]; + rels[i] = NULL; + 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) +{ + unsigned int i; + arelent **entries; + asection *sec; + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + + sec = section->bfdsection; + if (sec->reloc_count == 0) + return TRUE; + + if (bed->_bfd_mach_o_swap_reloc_out == NULL) + return TRUE; + + if (bfd_seek (abfd, section->reloff, SEEK_SET) != 0) + return FALSE; + + /* Convert and write. */ + entries = section->bfdsection->orelocation; + for (i = 0; i < section->nreloc; i++) + { + arelent *rel = entries[i]; + struct mach_o_reloc_info_external raw; + bfd_mach_o_reloc_info info, *pinfo = &info; + + /* Convert relocation to an intermediate representation. */ + if (!(*bed->_bfd_mach_o_swap_reloc_out) (rel, pinfo)) + return FALSE; + + /* Lower the relocation info. */ + if (pinfo->r_scattered) + { + unsigned long v; + + v = BFD_MACH_O_SR_SCATTERED + | (pinfo->r_pcrel ? BFD_MACH_O_SR_PCREL : 0) + | BFD_MACH_O_SET_SR_LENGTH(pinfo->r_length) + | BFD_MACH_O_SET_SR_TYPE(pinfo->r_type) + | BFD_MACH_O_SET_SR_ADDRESS(pinfo->r_address); + /* Note: scattered relocs have field in reverse order... */ + bfd_put_32 (abfd, v, raw.r_address); + bfd_put_32 (abfd, pinfo->r_value, raw.r_symbolnum); + } + else + { + bfd_put_32 (abfd, pinfo->r_address, raw.r_address); + bfd_mach_o_swap_out_non_scattered_reloc (abfd, raw.r_symbolnum, + pinfo); + } + + if (bfd_bwrite (&raw, BFD_MACH_O_RELENT_SIZE, abfd) + != BFD_MACH_O_RELENT_SIZE) + return FALSE; + } + return TRUE; +} + +static int +bfd_mach_o_write_section_32 (bfd *abfd, bfd_mach_o_section *section) +{ + struct mach_o_section_32_external raw; + + memcpy (raw.sectname, section->sectname, 16); + memcpy (raw.segname, section->segname, 16); + bfd_h_put_32 (abfd, section->addr, raw.addr); + bfd_h_put_32 (abfd, section->size, raw.size); + bfd_h_put_32 (abfd, section->offset, raw.offset); + bfd_h_put_32 (abfd, section->align, raw.align); + bfd_h_put_32 (abfd, section->reloff, raw.reloff); + bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); + bfd_h_put_32 (abfd, section->flags, raw.flags); + bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); + bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); + + if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_SIZE, abfd) + != BFD_MACH_O_SECTION_SIZE) + return -1; + + return 0; +} + +static int +bfd_mach_o_write_section_64 (bfd *abfd, bfd_mach_o_section *section) +{ + struct mach_o_section_64_external raw; + + memcpy (raw.sectname, section->sectname, 16); + memcpy (raw.segname, section->segname, 16); + bfd_h_put_64 (abfd, section->addr, raw.addr); + bfd_h_put_64 (abfd, section->size, raw.size); + bfd_h_put_32 (abfd, section->offset, raw.offset); + bfd_h_put_32 (abfd, section->align, raw.align); + bfd_h_put_32 (abfd, section->reloff, raw.reloff); + bfd_h_put_32 (abfd, section->nreloc, raw.nreloc); + bfd_h_put_32 (abfd, section->flags, raw.flags); + bfd_h_put_32 (abfd, section->reserved1, raw.reserved1); + bfd_h_put_32 (abfd, section->reserved2, raw.reserved2); + bfd_h_put_32 (abfd, section->reserved3, raw.reserved3); + + if (bfd_bwrite (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) + != BFD_MACH_O_SECTION_64_SIZE) + return -1; + + return 0; +} + +static int +bfd_mach_o_write_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) +{ + struct mach_o_segment_command_32_external raw; + bfd_mach_o_segment_command *seg = &command->command.segment; + bfd_mach_o_section *sec; + + BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); + + for (sec = seg->sect_head; sec != NULL; sec = sec->next) + if (!bfd_mach_o_write_relocs (abfd, sec)) + return -1; + + memcpy (raw.segname, seg->segname, 16); + bfd_h_put_32 (abfd, seg->vmaddr, raw.vmaddr); + bfd_h_put_32 (abfd, seg->vmsize, raw.vmsize); + bfd_h_put_32 (abfd, seg->fileoff, raw.fileoff); + bfd_h_put_32 (abfd, seg->filesize, raw.filesize); + bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); + bfd_h_put_32 (abfd, seg->initprot, raw.initprot); + bfd_h_put_32 (abfd, seg->nsects, raw.nsects); + bfd_h_put_32 (abfd, seg->flags, raw.flags); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + for (sec = seg->sect_head; sec != NULL; sec = sec->next) + if (bfd_mach_o_write_section_32 (abfd, sec)) + return -1; + + return 0; +} + +static int +bfd_mach_o_write_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) +{ + struct mach_o_segment_command_64_external raw; + bfd_mach_o_segment_command *seg = &command->command.segment; + bfd_mach_o_section *sec; + + BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); + + for (sec = seg->sect_head; sec != NULL; sec = sec->next) + if (!bfd_mach_o_write_relocs (abfd, sec)) + return -1; + + memcpy (raw.segname, seg->segname, 16); + bfd_h_put_64 (abfd, seg->vmaddr, raw.vmaddr); + bfd_h_put_64 (abfd, seg->vmsize, raw.vmsize); + bfd_h_put_64 (abfd, seg->fileoff, raw.fileoff); + bfd_h_put_64 (abfd, seg->filesize, raw.filesize); + bfd_h_put_32 (abfd, seg->maxprot, raw.maxprot); + bfd_h_put_32 (abfd, seg->initprot, raw.initprot); + bfd_h_put_32 (abfd, seg->nsects, raw.nsects); + bfd_h_put_32 (abfd, seg->flags, raw.flags); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + for (sec = seg->sect_head; sec != NULL; sec = sec->next) + if (bfd_mach_o_write_section_64 (abfd, sec)) + return -1; + + return 0; +} + +static bfd_boolean +bfd_mach_o_write_symtab (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_symtab_command *sym = &command->command.symtab; + unsigned long i; + unsigned int wide = bfd_mach_o_wide_p (abfd); + unsigned int symlen = wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; + struct bfd_strtab_hash *strtab; + asymbol **symbols = bfd_get_outsymbols (abfd); + + BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); + + /* Write the symbols first. */ + mdata->filelen = FILE_ALIGN(mdata->filelen, wide ? 3 : 2); + sym->symoff = mdata->filelen; + if (bfd_seek (abfd, sym->symoff, SEEK_SET) != 0) + return FALSE; + + sym->nsyms = bfd_get_symcount (abfd); + mdata->filelen += sym->nsyms * symlen; + + strtab = _bfd_stringtab_init (); + if (strtab == NULL) + return FALSE; + + if (sym->nsyms > 0) + /* Although we don't strictly need to do this, for compatibility with + Darwin system tools, actually output an empty string for the index + 0 entry. */ + _bfd_stringtab_add (strtab, "", TRUE, FALSE); + + for (i = 0; i < sym->nsyms; i++) + { + bfd_size_type str_index; + bfd_mach_o_asymbol *s = (bfd_mach_o_asymbol *)symbols[i]; + + 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; + } + + if (wide) + { + struct mach_o_nlist_64_external raw; + + bfd_h_put_32 (abfd, str_index, raw.n_strx); + bfd_h_put_8 (abfd, s->n_type, raw.n_type); + bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); + bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); + bfd_h_put_64 (abfd, s->symbol.section->vma + s->symbol.value, + raw.n_value); + + if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) + goto err; + } + else + { + struct mach_o_nlist_external raw; + + bfd_h_put_32 (abfd, str_index, raw.n_strx); + bfd_h_put_8 (abfd, s->n_type, raw.n_type); + bfd_h_put_8 (abfd, s->n_sect, raw.n_sect); + bfd_h_put_16 (abfd, s->n_desc, raw.n_desc); + bfd_h_put_32 (abfd, s->symbol.section->vma + s->symbol.value, + raw.n_value); + + if (bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) + goto err; + } + } + sym->strsize = _bfd_stringtab_size (strtab); + sym->stroff = mdata->filelen; + mdata->filelen += sym->strsize; + + if (_bfd_stringtab_emit (abfd, strtab) != TRUE) + goto err; + _bfd_stringtab_free (strtab); + + /* The command. */ + { + struct mach_o_symtab_command_external raw; + + bfd_h_put_32 (abfd, sym->symoff, raw.symoff); + bfd_h_put_32 (abfd, sym->nsyms, raw.nsyms); + bfd_h_put_32 (abfd, sym->stroff, raw.stroff); + bfd_h_put_32 (abfd, sym->strsize, raw.strsize); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bwrite (&raw, sizeof (raw), abfd) != sizeof (raw)) + return FALSE; + } + + return TRUE; + + err: + _bfd_stringtab_free (strtab); + return FALSE; +} + +/* 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]; + + /* 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) + { + /* 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->symbol.flags |= BSF_GLOBAL; + } + else + s->n_type = BFD_MACH_O_N_SECT; + + if (s->symbol.flags & BSF_GLOBAL) + s->n_type |= BFD_MACH_O_N_EXT; + } + + /* 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_type & BFD_MACH_O_N_STAB) != 0 + && s->symbol.name == NULL)) + s->n_sect = s->symbol.section->target_index; + + /* 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; +} + +bfd_boolean +bfd_mach_o_write_contents (bfd *abfd) +{ + 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; + + if (!bfd_mach_o_write_header (abfd, &mdata->header)) + return FALSE; + + for (i = 0; i < mdata->header.ncmds; i++) + { + struct mach_o_load_command_external raw; + bfd_mach_o_load_command *cur = &mdata->commands[i]; + unsigned long typeflag; + + typeflag = cur->type | (cur->type_required ? BFD_MACH_O_LC_REQ_DYLD : 0); + + bfd_h_put_32 (abfd, typeflag, raw.cmd); + bfd_h_put_32 (abfd, cur->len, raw.cmdsize); + + if (bfd_seek (abfd, cur->offset, SEEK_SET) != 0 + || bfd_bwrite (&raw, BFD_MACH_O_LC_SIZE, abfd) != 8) + return FALSE; + + switch (cur->type) + { + case BFD_MACH_O_LC_SEGMENT: + if (bfd_mach_o_write_segment_32 (abfd, cur) != 0) + return FALSE; + break; + case BFD_MACH_O_LC_SEGMENT_64: + if (bfd_mach_o_write_segment_64 (abfd, cur) != 0) + return FALSE; + break; + case BFD_MACH_O_LC_SYMTAB: + 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_UNIXTHREAD: + if (bfd_mach_o_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_LOAD_DYLIB: + case BFD_MACH_O_LC_LOAD_WEAK_DYLIB: + case BFD_MACH_O_LC_ID_DYLIB: + case BFD_MACH_O_LC_REEXPORT_DYLIB: + case BFD_MACH_O_LC_LOAD_UPWARD_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: + (*_bfd_error_handler) (_("unable to write unknown load command 0x%lx"), + (unsigned long) cur->type); + return FALSE; + } + } + + return TRUE; +} + +static void +bfd_mach_o_append_section_to_segment (bfd_mach_o_segment_command *seg, + asection *sec) +{ + bfd_mach_o_section *s = (bfd_mach_o_section *)sec->used_by_bfd; + if (seg->sect_head == NULL) + seg->sect_head = s; + else + seg->sect_tail->next = s; + seg->sect_tail = s; +} + +/* Create section Mach-O flags from BFD flags. */ + +static void +bfd_mach_o_set_section_flags_from_bfd (bfd *abfd ATTRIBUTE_UNUSED, asection *sec) +{ + flagword bfd_flags; + bfd_mach_o_section *s = bfd_mach_o_get_mach_o_section (sec); + + /* Create default flags. */ + bfd_flags = bfd_get_section_flags (abfd, sec); + if ((bfd_flags & SEC_CODE) == SEC_CODE) + s->flags = BFD_MACH_O_S_ATTR_PURE_INSTRUCTIONS + | BFD_MACH_O_S_ATTR_SOME_INSTRUCTIONS + | BFD_MACH_O_S_REGULAR; + else if ((bfd_flags & (SEC_ALLOC | SEC_LOAD)) == SEC_ALLOC) + s->flags = BFD_MACH_O_S_ZEROFILL; + else if (bfd_flags & SEC_DEBUGGING) + s->flags = BFD_MACH_O_S_REGULAR | BFD_MACH_O_S_ATTR_DEBUG; + else + s->flags = BFD_MACH_O_S_REGULAR; +} + +/* 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; + } + + /* 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; + + /* 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 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) + + a command (segment) to contain all the sections, + command for the symbol table, + a command for the dysymtab. + + ??? maybe we should assert that this is an MH_OBJECT? */ + + if (mdata->nsects > 0) + { + segcmd_idx = 0; + mdata->header.ncmds = 1; + } + + if (bfd_get_symcount (abfd) > 0) + { + mdata->header.ncmds++; + symtab_idx = segcmd_idx + 1; /* 0 if the seg command is absent. */ + } + + /* 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; + } + + if (wide) + base_offset = BFD_MACH_O_HEADER_64_SIZE; + else + base_offset = BFD_MACH_O_HEADER_SIZE; + + /* Well, we must have a header, at least. */ + mdata->filelen = base_offset; + + /* A bit unusual, but no content is valid; + as -n empty.s -o empty.o */ + if (mdata->header.ncmds == 0) + return TRUE; + + mdata->commands = bfd_zalloc (abfd, mdata->header.ncmds + * sizeof (bfd_mach_o_load_command)); + if (mdata->commands == NULL) + return FALSE; + + 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 + { + cmd->type = BFD_MACH_O_LC_SEGMENT; + cmd->len = BFD_MACH_O_LC_SEGMENT_SIZE + + BFD_MACH_O_SECTION_SIZE * seg->nsects; + } + + 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->header.sizeofcmds += cmd->len; + mdata->filelen += cmd->len; + } + + /* 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; +} + +/* Set the contents of a section. */ + +bfd_boolean +bfd_mach_o_set_section_contents (bfd *abfd, + asection *section, + const void * location, + file_ptr offset, + bfd_size_type count) +{ + file_ptr pos; + + /* 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 (count == 0) + return TRUE; + + pos = section->filepos + offset; + if (bfd_seek (abfd, pos, SEEK_SET) != 0 + || bfd_bwrite (location, count, abfd) != count) + return FALSE; + + return TRUE; +} + +int +bfd_mach_o_sizeof_headers (bfd *a ATTRIBUTE_UNUSED, + struct bfd_link_info *info 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. */ + +asymbol * +bfd_mach_o_make_empty_symbol (bfd *abfd) +{ + asymbol *new_symbol; + + new_symbol = bfd_zalloc (abfd, sizeof (bfd_mach_o_asymbol)); + if (new_symbol == NULL) + return new_symbol; + new_symbol->the_bfd = abfd; + new_symbol->udata.i = SYM_MACHO_FIELDS_UNSET; + return new_symbol; +} + +static bfd_boolean +bfd_mach_o_read_header (bfd *abfd, bfd_mach_o_header *header) +{ + struct mach_o_header_external raw; + unsigned int size; + bfd_vma (*get32) (const void *) = NULL; + + /* Just read the magic number. */ + if (bfd_seek (abfd, 0, SEEK_SET) != 0 + || bfd_bread (raw.magic, sizeof (raw.magic), abfd) != 4) + return FALSE; + + if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC) + { + header->byteorder = BFD_ENDIAN_BIG; + header->magic = BFD_MACH_O_MH_MAGIC; + header->version = 1; + get32 = bfd_getb32; + } + else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC) + { + header->byteorder = BFD_ENDIAN_LITTLE; + header->magic = BFD_MACH_O_MH_MAGIC; + header->version = 1; + get32 = bfd_getl32; + } + else if (bfd_getb32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) + { + header->byteorder = BFD_ENDIAN_BIG; + header->magic = BFD_MACH_O_MH_MAGIC_64; + header->version = 2; + get32 = bfd_getb32; + } + else if (bfd_getl32 (raw.magic) == BFD_MACH_O_MH_MAGIC_64) + { + header->byteorder = BFD_ENDIAN_LITTLE; + header->magic = BFD_MACH_O_MH_MAGIC_64; + header->version = 2; + get32 = bfd_getl32; + } + else + { + header->byteorder = BFD_ENDIAN_UNKNOWN; + return FALSE; + } + + /* Once the size of the header is known, read the full header. */ + size = mach_o_wide_p (header) ? + BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; + + if (bfd_seek (abfd, 0, SEEK_SET) != 0 + || bfd_bread (&raw, size, abfd) != size) + return FALSE; + + header->cputype = (*get32) (raw.cputype); + header->cpusubtype = (*get32) (raw.cpusubtype); + header->filetype = (*get32) (raw.filetype); + header->ncmds = (*get32) (raw.ncmds); + header->sizeofcmds = (*get32) (raw.sizeofcmds); + header->flags = (*get32) (raw.flags); + + if (mach_o_wide_p (header)) + header->reserved = (*get32) (raw.reserved); + else + header->reserved = 0; + + return TRUE; +} + +bfd_boolean +bfd_mach_o_new_section_hook (bfd *abfd, asection *sec) +{ + bfd_mach_o_section *s; + unsigned bfdalign = bfd_get_section_alignment (abfd, sec); + + s = bfd_mach_o_get_mach_o_section (sec); + if (s == NULL) + { + flagword bfd_flags; + static const mach_o_section_name_xlat * xlat; + + s = (bfd_mach_o_section *) bfd_zalloc (abfd, sizeof (*s)); + if (s == NULL) + return FALSE; + sec->used_by_bfd = s; + s->bfdsection = sec; + + /* Create the Darwin seg/sect name pair from the bfd name. + If this is a canonical name for which a specific paiting exists + there will also be defined flags, type, attribute and alignment + values. */ + xlat = bfd_mach_o_convert_section_name_to_mach_o (abfd, sec, s); + if (xlat != NULL) + { + s->flags = xlat->macho_sectype | xlat->macho_secattr; + s->align = xlat->sectalign > bfdalign ? xlat->sectalign + : bfdalign; + (void) bfd_set_section_alignment (abfd, sec, s->align); + bfd_flags = bfd_get_section_flags (abfd, sec); + if (bfd_flags == SEC_NO_FLAGS) + bfd_set_section_flags (abfd, sec, xlat->bfd_flags); + } + else + /* Create default flags. */ + bfd_mach_o_set_section_flags_from_bfd (abfd, sec); + } + + return _bfd_generic_new_section_hook (abfd, sec); +} + +static void +bfd_mach_o_init_section_from_mach_o (bfd *abfd, asection *sec, + unsigned long prot) +{ + flagword flags; + bfd_mach_o_section *section; + + flags = bfd_get_section_flags (abfd, sec); + section = bfd_mach_o_get_mach_o_section (sec); + + /* TODO: see if we should use the xlat system for doing this by + preference and fall back to this for unknown sections. */ + + if (flags == SEC_NO_FLAGS) + { + /* Try to guess flags. */ + if (section->flags & BFD_MACH_O_S_ATTR_DEBUG) + flags = SEC_DEBUGGING; + else + { + flags = SEC_ALLOC; + if ((section->flags & BFD_MACH_O_SECTION_TYPE_MASK) + != BFD_MACH_O_S_ZEROFILL) + { + flags |= SEC_LOAD; + if (prot & BFD_MACH_O_PROT_EXECUTE) + flags |= SEC_CODE; + if (prot & BFD_MACH_O_PROT_WRITE) + flags |= SEC_DATA; + else if (prot & BFD_MACH_O_PROT_READ) + flags |= SEC_READONLY; + } + } + } + else + { + if ((flags & SEC_DEBUGGING) == 0) + flags |= SEC_ALLOC; + } + + if (section->offset != 0) + flags |= SEC_HAS_CONTENTS; + if (section->nreloc != 0) + flags |= SEC_RELOC; + + bfd_set_section_flags (abfd, sec, flags); + + sec->vma = section->addr; + sec->lma = section->addr; + sec->size = section->size; + sec->filepos = section->offset; + sec->alignment_power = section->align; + sec->segment_mark = 0; + sec->reloc_count = section->nreloc; + sec->rel_filepos = section->reloff; +} + +static asection * +bfd_mach_o_make_bfd_section (bfd *abfd, + const unsigned char *segname, + const unsigned char *sectname) +{ + const char *sname; + flagword flags; + + bfd_mach_o_convert_section_name_to_bfd + (abfd, (const char *)segname, (const char *)sectname, &sname, &flags); + if (sname == NULL) + return NULL; + + return bfd_make_section_anyway_with_flags (abfd, sname, flags); +} + +static asection * +bfd_mach_o_read_section_32 (bfd *abfd, + unsigned int offset, + unsigned long prot) +{ + struct mach_o_section_32_external raw; + asection *sec; + bfd_mach_o_section *section; + + if (bfd_seek (abfd, offset, SEEK_SET) != 0 + || (bfd_bread (&raw, BFD_MACH_O_SECTION_SIZE, abfd) + != BFD_MACH_O_SECTION_SIZE)) + return NULL; + + sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); + if (sec == NULL) + return NULL; + + section = bfd_mach_o_get_mach_o_section (sec); + memcpy (section->segname, raw.segname, sizeof (raw.segname)); + section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; + memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); + section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; + section->addr = bfd_h_get_32 (abfd, raw.addr); + section->size = bfd_h_get_32 (abfd, raw.size); + section->offset = bfd_h_get_32 (abfd, raw.offset); + section->align = bfd_h_get_32 (abfd, raw.align); + section->reloff = bfd_h_get_32 (abfd, raw.reloff); + section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); + section->flags = bfd_h_get_32 (abfd, raw.flags); + section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); + section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); + section->reserved3 = 0; + + bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); + + return sec; +} + +static asection * +bfd_mach_o_read_section_64 (bfd *abfd, + unsigned int offset, + unsigned long prot) +{ + struct mach_o_section_64_external raw; + asection *sec; + bfd_mach_o_section *section; + + if (bfd_seek (abfd, offset, SEEK_SET) != 0 + || (bfd_bread (&raw, BFD_MACH_O_SECTION_64_SIZE, abfd) + != BFD_MACH_O_SECTION_64_SIZE)) + return NULL; + + sec = bfd_mach_o_make_bfd_section (abfd, raw.segname, raw.sectname); + if (sec == NULL) + return NULL; + + section = bfd_mach_o_get_mach_o_section (sec); + memcpy (section->segname, raw.segname, sizeof (raw.segname)); + section->segname[BFD_MACH_O_SEGNAME_SIZE] = 0; + memcpy (section->sectname, raw.sectname, sizeof (raw.sectname)); + section->sectname[BFD_MACH_O_SECTNAME_SIZE] = 0; + section->addr = bfd_h_get_64 (abfd, raw.addr); + section->size = bfd_h_get_64 (abfd, raw.size); + section->offset = bfd_h_get_32 (abfd, raw.offset); + section->align = bfd_h_get_32 (abfd, raw.align); + section->reloff = bfd_h_get_32 (abfd, raw.reloff); + section->nreloc = bfd_h_get_32 (abfd, raw.nreloc); + section->flags = bfd_h_get_32 (abfd, raw.flags); + section->reserved1 = bfd_h_get_32 (abfd, raw.reserved1); + section->reserved2 = bfd_h_get_32 (abfd, raw.reserved2); + section->reserved3 = bfd_h_get_32 (abfd, raw.reserved3); + + bfd_mach_o_init_section_from_mach_o (abfd, sec, prot); + + return sec; +} + +static asection * +bfd_mach_o_read_section (bfd *abfd, + unsigned int offset, + unsigned long prot, + unsigned int wide) +{ + if (wide) + return bfd_mach_o_read_section_64 (abfd, offset, prot); + else + return bfd_mach_o_read_section_32 (abfd, offset, prot); +} + +static bfd_boolean +bfd_mach_o_read_symtab_symbol (bfd *abfd, + bfd_mach_o_symtab_command *sym, + bfd_mach_o_asymbol *s, + unsigned long i) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + unsigned int wide = mach_o_wide_p (&mdata->header); + unsigned int symwidth = + wide ? BFD_MACH_O_NLIST_64_SIZE : BFD_MACH_O_NLIST_SIZE; + unsigned int symoff = sym->symoff + (i * symwidth); + struct mach_o_nlist_64_external raw; + unsigned char type = -1; + unsigned char section = -1; + short desc = -1; + symvalue value = -1; + unsigned long stroff = -1; + unsigned int symtype = -1; + + BFD_ASSERT (sym->strtab != NULL); + + if (bfd_seek (abfd, symoff, SEEK_SET) != 0 + || bfd_bread (&raw, symwidth, abfd) != symwidth) + { + (*_bfd_error_handler) + (_("bfd_mach_o_read_symtab_symbol: unable to read %d bytes at %lu"), + symwidth, (unsigned long) symoff); + return FALSE; + } + + stroff = bfd_h_get_32 (abfd, raw.n_strx); + type = bfd_h_get_8 (abfd, raw.n_type); + symtype = type & BFD_MACH_O_N_TYPE; + section = bfd_h_get_8 (abfd, raw.n_sect); + desc = bfd_h_get_16 (abfd, raw.n_desc); + if (wide) + value = bfd_h_get_64 (abfd, raw.n_value); + else + value = bfd_h_get_32 (abfd, raw.n_value); + + if (stroff >= sym->strsize) + { + (*_bfd_error_handler) + (_("bfd_mach_o_read_symtab_symbol: name out of range (%lu >= %lu)"), + (unsigned long) stroff, + (unsigned long) sym->strsize); + return FALSE; + } + + s->symbol.the_bfd = abfd; + s->symbol.name = sym->strtab + stroff; + s->symbol.value = value; + s->symbol.flags = 0x0; + s->symbol.udata.i = i; + s->n_type = type; + s->n_sect = section; + s->n_desc = desc; + + if (type & BFD_MACH_O_N_STAB) + { + s->symbol.flags |= BSF_DEBUGGING; + s->symbol.section = bfd_und_section_ptr; + switch (type) + { + case N_FUN: + case N_STSYM: + case N_LCSYM: + case N_BNSYM: + case N_SLINE: + case N_ENSYM: + case N_ECOMM: + case N_ECOML: + case N_GSYM: + if ((section > 0) && (section <= mdata->nsects)) + { + s->symbol.section = mdata->sections[section - 1]->bfdsection; + s->symbol.value = + s->symbol.value - mdata->sections[section - 1]->addr; + } + break; + } + } + else + { + if (type & (BFD_MACH_O_N_PEXT | BFD_MACH_O_N_EXT)) + s->symbol.flags |= BSF_GLOBAL; + else + s->symbol.flags |= BSF_LOCAL; + + switch (symtype) + { + case BFD_MACH_O_N_UNDF: + if (type == (BFD_MACH_O_N_UNDF | BFD_MACH_O_N_EXT) + && s->symbol.value != 0) + { + /* A common symbol. */ + s->symbol.section = bfd_com_section_ptr; + s->symbol.flags = BSF_NO_FLAGS; + } + else + { + s->symbol.section = bfd_und_section_ptr; + if (s->n_desc & BFD_MACH_O_N_WEAK_REF) + s->symbol.flags |= BSF_WEAK; + } + break; + case BFD_MACH_O_N_PBUD: + s->symbol.section = bfd_und_section_ptr; + break; + case BFD_MACH_O_N_ABS: + s->symbol.section = bfd_abs_section_ptr; + break; + case BFD_MACH_O_N_SECT: + if ((section > 0) && (section <= mdata->nsects)) + { + s->symbol.section = mdata->sections[section - 1]->bfdsection; + s->symbol.value = + s->symbol.value - mdata->sections[section - 1]->addr; + } + else + { + /* Mach-O uses 0 to mean "no section"; not an error. */ + if (section != 0) + { + (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: " + "symbol \"%s\" specified invalid section %d (max %lu): setting to undefined"), + s->symbol.name, section, mdata->nsects); + } + s->symbol.section = bfd_und_section_ptr; + } + break; + case BFD_MACH_O_N_INDR: + /* FIXME: we don't follow the BFD convention as this indirect symbol + won't be followed by the referenced one. This looks harmless + unless we start using the linker. */ + s->symbol.flags |= BSF_INDIRECT; + s->symbol.section = bfd_ind_section_ptr; + s->symbol.value = 0; + break; + default: + (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbol: " + "symbol \"%s\" specified invalid type field 0x%x: setting to undefined"), + s->symbol.name, symtype); + s->symbol.section = bfd_und_section_ptr; + break; + } + } + + return TRUE; +} + +bfd_boolean +bfd_mach_o_read_symtab_strtab (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_symtab_command *sym = mdata->symtab; + + /* Fail if there is no symtab. */ + if (sym == NULL) + return FALSE; + + /* Success if already loaded. */ + if (sym->strtab) + return TRUE; + + 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 FALSE; + } + sym->strtab = (char *) b->buffer + sym->stroff; + } + else + { + sym->strtab = bfd_alloc (abfd, sym->strsize); + if (sym->strtab == NULL) + return FALSE; + + if (bfd_seek (abfd, sym->stroff, SEEK_SET) != 0 + || bfd_bread (sym->strtab, sym->strsize, abfd) != sym->strsize) + { + bfd_set_error (bfd_error_file_truncated); + return FALSE; + } + } + + return TRUE; +} + +bfd_boolean +bfd_mach_o_read_symtab_symbols (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_symtab_command *sym = mdata->symtab; + unsigned long i; + + if (sym == NULL || sym->symbols) + { + /* Return now if there are no symbols or if already loaded. */ + return TRUE; + } + + sym->symbols = bfd_alloc (abfd, sym->nsyms * sizeof (bfd_mach_o_asymbol)); + + if (sym->symbols == NULL) + { + (*_bfd_error_handler) (_("bfd_mach_o_read_symtab_symbols: unable to allocate memory for symbols")); + return FALSE; + } + + if (!bfd_mach_o_read_symtab_strtab (abfd)) + return FALSE; + + for (i = 0; i < sym->nsyms; i++) + { + if (!bfd_mach_o_read_symtab_symbol (abfd, sym, &sym->symbols[i], i)) + return FALSE; + } + + return TRUE; +} + +static const char * +bfd_mach_o_i386_flavour_string (unsigned int flavour) +{ + switch ((int) flavour) + { + case BFD_MACH_O_x86_THREAD_STATE32: return "x86_THREAD_STATE32"; + case BFD_MACH_O_x86_FLOAT_STATE32: return "x86_FLOAT_STATE32"; + case BFD_MACH_O_x86_EXCEPTION_STATE32: return "x86_EXCEPTION_STATE32"; + case BFD_MACH_O_x86_THREAD_STATE64: return "x86_THREAD_STATE64"; + case BFD_MACH_O_x86_FLOAT_STATE64: return "x86_FLOAT_STATE64"; + case BFD_MACH_O_x86_EXCEPTION_STATE64: return "x86_EXCEPTION_STATE64"; + case BFD_MACH_O_x86_THREAD_STATE: return "x86_THREAD_STATE"; + case BFD_MACH_O_x86_FLOAT_STATE: return "x86_FLOAT_STATE"; + case BFD_MACH_O_x86_EXCEPTION_STATE: return "x86_EXCEPTION_STATE"; + case BFD_MACH_O_x86_DEBUG_STATE32: return "x86_DEBUG_STATE32"; + case BFD_MACH_O_x86_DEBUG_STATE64: return "x86_DEBUG_STATE64"; + case BFD_MACH_O_x86_DEBUG_STATE: return "x86_DEBUG_STATE"; + case BFD_MACH_O_x86_THREAD_STATE_NONE: return "x86_THREAD_STATE_NONE"; + default: return "UNKNOWN"; + } +} + +static const char * +bfd_mach_o_ppc_flavour_string (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"; + case BFD_MACH_O_PPC_THREAD_STATE64: return "PPC_THREAD_STATE64"; + case BFD_MACH_O_PPC_EXCEPTION_STATE64: return "PPC_EXCEPTION_STATE64"; + default: return "UNKNOWN"; + } +} + +static int +bfd_mach_o_read_dylinker (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_dylinker_command *cmd = &command->command.dylinker; + struct mach_o_str_command_external raw; + unsigned int nameoff; + + BFD_ASSERT ((command->type == BFD_MACH_O_LC_ID_DYLINKER) + || (command->type == BFD_MACH_O_LC_LOAD_DYLINKER)); + + 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.str); + + cmd->name_offset = command->offset + nameoff; + cmd->name_len = command->len - nameoff; + cmd->name_str = bfd_alloc (abfd, cmd->name_len); + if (cmd->name_str == NULL) + return -1; + if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0 + || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len) + return -1; + return 0; +} + +static int +bfd_mach_o_read_dylib (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_dylib_command *cmd = &command->command.dylib; + struct mach_o_dylib_command_external raw; + unsigned int nameoff; + + switch (command->type) + { + 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_REEXPORT_DYLIB: + case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: + break; + default: + BFD_FAIL (); + return -1; + } + + 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); + cmd->timestamp = bfd_h_get_32 (abfd, raw.timestamp); + cmd->current_version = bfd_h_get_32 (abfd, raw.current_version); + cmd->compatibility_version = bfd_h_get_32 (abfd, raw.compatibility_version); + + cmd->name_offset = command->offset + nameoff; + cmd->name_len = command->len - nameoff; + cmd->name_str = bfd_alloc (abfd, cmd->name_len); + if (cmd->name_str == NULL) + return -1; + if (bfd_seek (abfd, cmd->name_offset, SEEK_SET) != 0 + || bfd_bread (cmd->name_str, cmd->name_len, abfd) != cmd->name_len) + return -1; + return 0; +} + +static int +bfd_mach_o_read_prebound_dylib (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_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) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + bfd_mach_o_thread_command *cmd = &command->command.thread; + unsigned int offset; + unsigned int nflavours; + unsigned int i; + + BFD_ASSERT ((command->type == BFD_MACH_O_LC_THREAD) + || (command->type == BFD_MACH_O_LC_UNIXTHREAD)); + + /* Count the number of threads. */ + offset = 8; + nflavours = 0; + while (offset != command->len) + { + struct mach_o_thread_command_external raw; + + if (offset >= command->len) + return -1; + + if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 + || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + offset += sizeof (raw) + bfd_h_get_32 (abfd, raw.count) * 4; + nflavours++; + } + + /* Allocate threads. */ + cmd->flavours = 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) + { + struct mach_o_thread_command_external raw; + + if (offset >= command->len) + return -1; + + if (nflavours >= cmd->nflavours) + return -1; + + if (bfd_seek (abfd, command->offset + offset, SEEK_SET) != 0 + || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + cmd->flavours[nflavours].flavour = bfd_h_get_32 (abfd, raw.flavour); + cmd->flavours[nflavours].offset = command->offset + offset + sizeof (raw); + cmd->flavours[nflavours].size = bfd_h_get_32 (abfd, raw.count) * 4; + offset += cmd->flavours[nflavours].size + sizeof (raw); + nflavours++; + } + + for (i = 0; i < nflavours; i++) + { + asection *bfdsec; + unsigned int snamelen; + char *sname; + const char *flavourstr; + const char *prefix = "LC_THREAD"; + unsigned int j = 0; + + switch (mdata->header.cputype) + { + case BFD_MACH_O_CPU_TYPE_POWERPC: + case BFD_MACH_O_CPU_TYPE_POWERPC_64: + flavourstr = bfd_mach_o_ppc_flavour_string (cmd->flavours[i].flavour); + break; + case BFD_MACH_O_CPU_TYPE_I386: + case BFD_MACH_O_CPU_TYPE_X86_64: + 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 = bfd_alloc (abfd, snamelen); + if (sname == NULL) + return -1; + + for (;;) + { + sprintf (sname, "%s.%s.%u", prefix, flavourstr, j); + if (bfd_get_section_by_name (abfd, sname) == NULL) + break; + j++; + } + + bfdsec = bfd_make_section_with_flags (abfd, sname, SEC_HAS_CONTENTS); + + bfdsec->vma = 0; + bfdsec->lma = 0; + bfdsec->size = cmd->flavours[i].size; + bfdsec->filepos = cmd->flavours[i].offset; + bfdsec->alignment_power = 0x0; + + cmd->section = bfdsec; + } + + return 0; +} + +static int +bfd_mach_o_read_dysymtab (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_dysymtab_command *cmd = &command->command.dysymtab; + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + + BFD_ASSERT (command->type == BFD_MACH_O_LC_DYSYMTAB); + + { + struct mach_o_dysymtab_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 -1; + + cmd->ilocalsym = bfd_h_get_32 (abfd, raw.ilocalsym); + cmd->nlocalsym = bfd_h_get_32 (abfd, raw.nlocalsym); + cmd->iextdefsym = bfd_h_get_32 (abfd, raw.iextdefsym); + cmd->nextdefsym = bfd_h_get_32 (abfd, raw.nextdefsym); + cmd->iundefsym = bfd_h_get_32 (abfd, raw.iundefsym); + cmd->nundefsym = bfd_h_get_32 (abfd, raw.nundefsym); + cmd->tocoff = bfd_h_get_32 (abfd, raw.tocoff); + cmd->ntoc = bfd_h_get_32 (abfd, raw.ntoc); + cmd->modtaboff = bfd_h_get_32 (abfd, raw.modtaboff); + cmd->nmodtab = bfd_h_get_32 (abfd, raw.nmodtab); + cmd->extrefsymoff = bfd_h_get_32 (abfd, raw.extrefsymoff); + cmd->nextrefsyms = bfd_h_get_32 (abfd, raw.nextrefsyms); + cmd->indirectsymoff = bfd_h_get_32 (abfd, raw.indirectsymoff); + cmd->nindirectsyms = bfd_h_get_32 (abfd, raw.nindirectsyms); + cmd->extreloff = bfd_h_get_32 (abfd, raw.extreloff); + cmd->nextrel = bfd_h_get_32 (abfd, raw.nextrel); + cmd->locreloff = bfd_h_get_32 (abfd, raw.locreloff); + cmd->nlocrel = bfd_h_get_32 (abfd, raw.nlocrel); + } + + if (cmd->nmodtab != 0) + { + unsigned int i; + int wide = bfd_mach_o_wide_p (abfd); + unsigned int module_len = wide ? 56 : 52; + + cmd->dylib_module = + bfd_alloc (abfd, cmd->nmodtab * sizeof (bfd_mach_o_dylib_module)); + if (cmd->dylib_module == NULL) + return -1; + + if (bfd_seek (abfd, cmd->modtaboff, SEEK_SET) != 0) + return -1; + + for (i = 0; i < cmd->nmodtab; i++) + { + bfd_mach_o_dylib_module *module = &cmd->dylib_module[i]; + unsigned long v; + unsigned char buf[56]; + + if (bfd_bread ((void *) buf, module_len, abfd) != module_len) + return -1; + + module->module_name_idx = bfd_h_get_32 (abfd, buf + 0); + module->iextdefsym = bfd_h_get_32 (abfd, buf + 4); + module->nextdefsym = bfd_h_get_32 (abfd, buf + 8); + module->irefsym = bfd_h_get_32 (abfd, buf + 12); + module->nrefsym = bfd_h_get_32 (abfd, buf + 16); + module->ilocalsym = bfd_h_get_32 (abfd, buf + 20); + module->nlocalsym = bfd_h_get_32 (abfd, buf + 24); + module->iextrel = bfd_h_get_32 (abfd, buf + 28); + module->nextrel = bfd_h_get_32 (abfd, buf + 32); + v = bfd_h_get_32 (abfd, buf +36); + module->iinit = v & 0xffff; + module->iterm = (v >> 16) & 0xffff; + v = bfd_h_get_32 (abfd, buf + 40); + module->ninit = v & 0xffff; + module->nterm = (v >> 16) & 0xffff; + if (wide) + { + module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 44); + module->objc_module_info_addr = bfd_h_get_64 (abfd, buf + 48); + } + else + { + module->objc_module_info_addr = bfd_h_get_32 (abfd, buf + 44); + module->objc_module_info_size = bfd_h_get_32 (abfd, buf + 48); + } + } + } + + if (cmd->ntoc != 0) + { + unsigned int i; + + cmd->dylib_toc = bfd_alloc + (abfd, cmd->ntoc * sizeof (bfd_mach_o_dylib_table_of_content)); + if (cmd->dylib_toc == NULL) + return -1; + + if (bfd_seek (abfd, cmd->tocoff, SEEK_SET) != 0) + return -1; + + 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]; + + if (bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + toc->symbol_index = bfd_h_get_32 (abfd, raw.symbol_index); + toc->module_index = bfd_h_get_32 (abfd, raw.module_index); + } + } + + if (cmd->nindirectsyms != 0) + { + unsigned int i; + + cmd->indirect_syms = bfd_alloc + (abfd, cmd->nindirectsyms * sizeof (unsigned int)); + if (cmd->indirect_syms == NULL) + return -1; + + if (bfd_seek (abfd, cmd->indirectsymoff, SEEK_SET) != 0) + return -1; + + for (i = 0; i < cmd->nindirectsyms; i++) + { + unsigned char raw[4]; + unsigned int *is = &cmd->indirect_syms[i]; + + if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + *is = bfd_h_get_32 (abfd, raw); + } + } + + if (cmd->nextrefsyms != 0) + { + unsigned long v; + unsigned int i; + + cmd->ext_refs = bfd_alloc + (abfd, cmd->nextrefsyms * sizeof (bfd_mach_o_dylib_reference)); + if (cmd->ext_refs == NULL) + return -1; + + if (bfd_seek (abfd, cmd->extrefsymoff, SEEK_SET) != 0) + return -1; + + for (i = 0; i < cmd->nextrefsyms; i++) + { + unsigned char raw[4]; + bfd_mach_o_dylib_reference *ref = &cmd->ext_refs[i]; + + if (bfd_bread (raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + /* Fields isym and flags are written as bit-fields, thus we need + a specific processing for endianness. */ + v = bfd_h_get_32 (abfd, raw); + if (bfd_big_endian (abfd)) + { + ref->isym = (v >> 8) & 0xffffff; + ref->flags = v & 0xff; + } + else + { + ref->isym = v & 0xffffff; + ref->flags = (v >> 24) & 0xff; + } + } + } + + if (mdata->dysymtab) + return -1; + mdata->dysymtab = cmd; + + return 0; +} + +static int +bfd_mach_o_read_symtab (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_symtab_command *symtab = &command->command.symtab; + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + struct mach_o_symtab_command_external raw; + + BFD_ASSERT (command->type == BFD_MACH_O_LC_SYMTAB); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + symtab->symoff = bfd_h_get_32 (abfd, raw.symoff); + symtab->nsyms = bfd_h_get_32 (abfd, raw.nsyms); + symtab->stroff = bfd_h_get_32 (abfd, raw.stroff); + symtab->strsize = bfd_h_get_32 (abfd, raw.strsize); + symtab->symbols = NULL; + symtab->strtab = NULL; + + if (symtab->nsyms != 0) + abfd->flags |= HAS_SYMS; + + if (mdata->symtab) + return -1; + mdata->symtab = symtab; + return 0; +} + +static int +bfd_mach_o_read_uuid (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_uuid_command *cmd = &command->command.uuid; + + BFD_ASSERT (command->type == BFD_MACH_O_LC_UUID); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bread (cmd->uuid, 16, abfd) != 16) + return -1; + + return 0; +} + +static int +bfd_mach_o_read_linkedit (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_linkedit_command *cmd = &command->command.linkedit; + struct mach_o_linkedit_data_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 -1; + + cmd->dataoff = bfd_get_32 (abfd, raw.dataoff); + cmd->datasize = bfd_get_32 (abfd, raw.datasize); + return 0; +} + +static int +bfd_mach_o_read_str (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_str_command *cmd = &command->command.str; + struct mach_o_str_command_external raw; + unsigned long off; + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + off = bfd_get_32 (abfd, raw.str); + cmd->stroff = command->offset + off; + cmd->str_len = command->len - off; + cmd->str = bfd_alloc (abfd, cmd->str_len); + if (cmd->str == NULL) + return -1; + if (bfd_seek (abfd, cmd->stroff, SEEK_SET) != 0 + || bfd_bread ((void *) cmd->str, cmd->str_len, abfd) != cmd->str_len) + return -1; + return 0; +} + +static int +bfd_mach_o_read_dyld_info (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_dyld_info_command *cmd = &command->command.dyld_info; + struct mach_o_dyld_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 -1; + + cmd->rebase_off = bfd_get_32 (abfd, raw.rebase_off); + cmd->rebase_size = bfd_get_32 (abfd, raw.rebase_size); + cmd->bind_off = bfd_get_32 (abfd, raw.bind_off); + cmd->bind_size = bfd_get_32 (abfd, raw.bind_size); + cmd->weak_bind_off = bfd_get_32 (abfd, raw.weak_bind_off); + cmd->weak_bind_size = bfd_get_32 (abfd, raw.weak_bind_size); + cmd->lazy_bind_off = bfd_get_32 (abfd, raw.lazy_bind_off); + cmd->lazy_bind_size = bfd_get_32 (abfd, raw.lazy_bind_size); + cmd->export_off = bfd_get_32 (abfd, raw.export_off); + cmd->export_size = bfd_get_32 (abfd, raw.export_size); + return 0; +} + +static bfd_boolean +bfd_mach_o_read_version_min (bfd *abfd, bfd_mach_o_load_command *command) +{ + bfd_mach_o_version_min_command *cmd = &command->command.version_min; + struct mach_o_version_min_command_external raw; + unsigned int 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_32 (abfd, raw.version); + cmd->rel = ver >> 16; + cmd->maj = ver >> 8; + cmd->min = ver; + cmd->reserved = bfd_get_32 (abfd, raw.reserved); + 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, + unsigned int wide) +{ + bfd_mach_o_segment_command *seg = &command->command.segment; + unsigned long i; + + if (wide) + { + struct mach_o_segment_command_64_external raw; + + BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT_64); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + memcpy (seg->segname, raw.segname, 16); + seg->segname[16] = '\0'; + + seg->vmaddr = bfd_h_get_64 (abfd, raw.vmaddr); + seg->vmsize = bfd_h_get_64 (abfd, raw.vmsize); + seg->fileoff = bfd_h_get_64 (abfd, raw.fileoff); + seg->filesize = bfd_h_get_64 (abfd, raw.filesize); + seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); + seg->initprot = bfd_h_get_32 (abfd, raw.initprot); + seg->nsects = bfd_h_get_32 (abfd, raw.nsects); + seg->flags = bfd_h_get_32 (abfd, raw.flags); + } + else + { + struct mach_o_segment_command_32_external raw; + + BFD_ASSERT (command->type == BFD_MACH_O_LC_SEGMENT); + + if (bfd_seek (abfd, command->offset + BFD_MACH_O_LC_SIZE, SEEK_SET) != 0 + || bfd_bread (&raw, sizeof (raw), abfd) != sizeof (raw)) + return -1; + + memcpy (seg->segname, raw.segname, 16); + seg->segname[16] = '\0'; + + seg->vmaddr = bfd_h_get_32 (abfd, raw.vmaddr); + seg->vmsize = bfd_h_get_32 (abfd, raw.vmsize); + seg->fileoff = bfd_h_get_32 (abfd, raw.fileoff); + seg->filesize = bfd_h_get_32 (abfd, raw.filesize); + seg->maxprot = bfd_h_get_32 (abfd, raw.maxprot); + seg->initprot = bfd_h_get_32 (abfd, raw.initprot); + seg->nsects = bfd_h_get_32 (abfd, raw.nsects); + seg->flags = bfd_h_get_32 (abfd, raw.flags); + } + seg->sect_head = NULL; + seg->sect_tail = NULL; + + for (i = 0; i < seg->nsects; i++) + { + bfd_vma segoff; + asection *sec; + + if (wide) + segoff = command->offset + BFD_MACH_O_LC_SEGMENT_64_SIZE + + (i * BFD_MACH_O_SECTION_64_SIZE); + else + segoff = command->offset + BFD_MACH_O_LC_SEGMENT_SIZE + + (i * BFD_MACH_O_SECTION_SIZE); + + sec = bfd_mach_o_read_section (abfd, segoff, seg->initprot, wide); + if (sec == NULL) + return -1; + + bfd_mach_o_append_section_to_segment (seg, sec); + } + + return 0; +} + +static int +bfd_mach_o_read_segment_32 (bfd *abfd, bfd_mach_o_load_command *command) +{ + return bfd_mach_o_read_segment (abfd, command, 0); +} + +static int +bfd_mach_o_read_segment_64 (bfd *abfd, bfd_mach_o_load_command *command) +{ + return bfd_mach_o_read_segment (abfd, command, 1); +} + +static int +bfd_mach_o_read_command (bfd *abfd, bfd_mach_o_load_command *command) +{ + struct mach_o_load_command_external raw; + unsigned int cmd; + + /* Read command type and length. */ + if (bfd_seek (abfd, command->offset, SEEK_SET) != 0 + || bfd_bread (&raw, BFD_MACH_O_LC_SIZE, abfd) != BFD_MACH_O_LC_SIZE) + return -1; + + cmd = bfd_h_get_32 (abfd, raw.cmd); + command->type = cmd & ~BFD_MACH_O_LC_REQ_DYLD; + command->type_required = cmd & BFD_MACH_O_LC_REQ_DYLD ? TRUE : FALSE; + command->len = bfd_h_get_32 (abfd, raw.cmdsize); + + switch (command->type) + { + case BFD_MACH_O_LC_SEGMENT: + if (bfd_mach_o_read_segment_32 (abfd, command) != 0) + return -1; + break; + case BFD_MACH_O_LC_SEGMENT_64: + if (bfd_mach_o_read_segment_64 (abfd, command) != 0) + return -1; + break; + case BFD_MACH_O_LC_SYMTAB: + if (bfd_mach_o_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_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_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: + case BFD_MACH_O_LC_REEXPORT_DYLIB: + case BFD_MACH_O_LC_LOAD_UPWARD_DYLIB: + if (bfd_mach_o_read_dylib (abfd, command) != 0) + return -1; + break; + case BFD_MACH_O_LC_PREBOUND_DYLIB: + if (bfd_mach_o_read_prebound_dylib (abfd, command) != 0) + return -1; + 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_ROUTINES: + case BFD_MACH_O_LC_ROUTINES_64: + break; + case BFD_MACH_O_LC_SUB_FRAMEWORK: + case BFD_MACH_O_LC_SUB_UMBRELLA: + case BFD_MACH_O_LC_SUB_LIBRARY: + case BFD_MACH_O_LC_SUB_CLIENT: + case BFD_MACH_O_LC_RPATH: + if (bfd_mach_o_read_str (abfd, command) != 0) + return -1; + break; + case BFD_MACH_O_LC_DYSYMTAB: + if (bfd_mach_o_read_dysymtab (abfd, command) != 0) + return -1; + break; + case BFD_MACH_O_LC_TWOLEVEL_HINTS: + case BFD_MACH_O_LC_PREBIND_CKSUM: + break; + case BFD_MACH_O_LC_UUID: + if (bfd_mach_o_read_uuid (abfd, command) != 0) + return -1; + break; + 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; + break; + case BFD_MACH_O_LC_VERSION_MIN_MACOSX: + case BFD_MACH_O_LC_VERSION_MIN_IPHONEOS: + 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: unknown load command 0x%lx"), + abfd, (unsigned long) command->type); + break; + } + + return 0; +} + +static void +bfd_mach_o_flatten_sections (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + long csect = 0; + unsigned long i; + + /* Count total number of sections. */ + mdata->nsects = 0; + + for (i = 0; i < mdata->header.ncmds; i++) + { + if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT + || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64) + { + bfd_mach_o_segment_command *seg; + + seg = &mdata->commands[i].command.segment; + mdata->nsects += seg->nsects; + } + } + + /* Allocate sections array. */ + mdata->sections = bfd_alloc (abfd, + mdata->nsects * sizeof (bfd_mach_o_section *)); + + /* Fill the array. */ + csect = 0; + + for (i = 0; i < mdata->header.ncmds; i++) + { + if (mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT + || mdata->commands[i].type == BFD_MACH_O_LC_SEGMENT_64) + { + bfd_mach_o_segment_command *seg; + bfd_mach_o_section *sec; + + seg = &mdata->commands[i].command.segment; + BFD_ASSERT (csect + seg->nsects <= mdata->nsects); + + for (sec = seg->sect_head; sec != NULL; sec = sec->next) + mdata->sections[csect++] = sec; + } + } +} + +static bfd_boolean +bfd_mach_o_scan_start_address (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + 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)) + { + cmd = &mdata->commands[i].command.thread; + break; + } + else if (mdata->commands[i].type == BFD_MACH_O_LC_MAIN + && mdata->nsects > 1) + { + bfd_mach_o_main_command *main_cmd = &mdata->commands[i].command.main; + bfd_mach_o_section *text_sect = mdata->sections[0]; + if (text_sect) + { + abfd->start_address = main_cmd->entryoff + + (text_sect->addr - text_sect->offset); + return TRUE; + } + } + + /* An object file has no start address, so do not fail if not found. */ + if (cmd == NULL) + return TRUE; + + /* FIXME: create a subtarget hook ? */ + 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_x86_THREAD_STATE32)) + { + unsigned char buf[4]; + + if (bfd_seek (abfd, cmd->flavours[i].offset + 40, SEEK_SET) != 0 + || bfd_bread (buf, 4, abfd) != 4) + return FALSE; + + 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]; + + if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0 + || bfd_bread (buf, 4, abfd) != 4) + return FALSE; + + abfd->start_address = bfd_h_get_32 (abfd, buf); + } + else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_POWERPC_64) + && (cmd->flavours[i].flavour == BFD_MACH_O_PPC_THREAD_STATE64)) + { + unsigned char buf[8]; + + if (bfd_seek (abfd, cmd->flavours[i].offset + 0, SEEK_SET) != 0 + || bfd_bread (buf, 8, abfd) != 8) + return FALSE; + + abfd->start_address = bfd_h_get_64 (abfd, buf); + } + else if ((mdata->header.cputype == BFD_MACH_O_CPU_TYPE_X86_64) + && (cmd->flavours[i].flavour == BFD_MACH_O_x86_THREAD_STATE64)) + { + unsigned char buf[8]; + + if (bfd_seek (abfd, cmd->flavours[i].offset + (16 * 8), SEEK_SET) != 0 + || bfd_bread (buf, 8, abfd) != 8) + return FALSE; + + abfd->start_address = bfd_h_get_64 (abfd, buf); + } + } + + return TRUE; +} + +bfd_boolean +bfd_mach_o_set_arch_mach (bfd *abfd, + enum bfd_architecture arch, + unsigned long machine) +{ + bfd_mach_o_backend_data *bed = bfd_mach_o_get_backend_data (abfd); + + /* If this isn't the right architecture for this backend, and this + isn't the generic backend, fail. */ + if (arch != bed->arch + && arch != bfd_arch_unknown + && bed->arch != bfd_arch_unknown) + return FALSE; + + return bfd_default_set_arch_mach (abfd, arch, machine); +} + +static bfd_boolean +bfd_mach_o_scan (bfd *abfd, + bfd_mach_o_header *header, + bfd_mach_o_data_struct *mdata) +{ + unsigned int i; + enum bfd_architecture cputype; + unsigned long cpusubtype; + unsigned int hdrsize; + + hdrsize = mach_o_wide_p (header) ? + BFD_MACH_O_HEADER_64_SIZE : BFD_MACH_O_HEADER_SIZE; + + mdata->header = *header; + + abfd->flags = abfd->flags & BFD_IN_MEMORY; + switch (header->filetype) + { + case BFD_MACH_O_MH_OBJECT: + abfd->flags |= HAS_RELOC; + break; + case BFD_MACH_O_MH_EXECUTE: + abfd->flags |= EXEC_P; + break; + case BFD_MACH_O_MH_DYLIB: + case BFD_MACH_O_MH_BUNDLE: + abfd->flags |= DYNAMIC; + break; + } + + abfd->tdata.mach_o_data = mdata; + + bfd_mach_o_convert_architecture (header->cputype, header->cpusubtype, + &cputype, &cpusubtype); + if (cputype == bfd_arch_unknown) + { + (*_bfd_error_handler) + (_("bfd_mach_o_scan: unknown architecture 0x%lx/0x%lx"), + header->cputype, header->cpusubtype); + return FALSE; + } + + bfd_set_arch_mach (abfd, cputype, cpusubtype); + + if (header->ncmds != 0) + { + mdata->commands = bfd_alloc + (abfd, header->ncmds * sizeof (bfd_mach_o_load_command)); + if (mdata->commands == NULL) + return FALSE; + + for (i = 0; i < header->ncmds; i++) + { + bfd_mach_o_load_command *cur = &mdata->commands[i]; + + if (i == 0) + cur->offset = hdrsize; + else + { + bfd_mach_o_load_command *prev = &mdata->commands[i - 1]; + cur->offset = prev->offset + prev->len; + } + + if (bfd_mach_o_read_command (abfd, cur) < 0) + return FALSE; + } + } + + /* Sections should be flatten before scanning start address. */ + bfd_mach_o_flatten_sections (abfd); + if (!bfd_mach_o_scan_start_address (abfd)) + return FALSE; + + return TRUE; +} + +bfd_boolean +bfd_mach_o_mkobject_init (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = NULL; + + mdata = 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->nsects = 0; + mdata->sections = NULL; + mdata->dyn_reloc_cache = NULL; + + return TRUE; +} + +static bfd_boolean +bfd_mach_o_gen_mkobject (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata; + + if (!bfd_mach_o_mkobject_init (abfd)) + return FALSE; + + mdata = bfd_mach_o_get_data (abfd); + mdata->header.magic = BFD_MACH_O_MH_MAGIC; + mdata->header.cputype = 0; + mdata->header.cpusubtype = 0; + mdata->header.byteorder = abfd->xvec->byteorder; + mdata->header.version = 1; + + return TRUE; +} + +const bfd_target * +bfd_mach_o_header_p (bfd *abfd, + bfd_mach_o_filetype filetype, + bfd_mach_o_cpu_type cputype) +{ + bfd_mach_o_header header; + bfd_mach_o_data_struct *mdata; + + if (!bfd_mach_o_read_header (abfd, &header)) + goto wrong; + + if (! (header.byteorder == BFD_ENDIAN_BIG + || header.byteorder == BFD_ENDIAN_LITTLE)) + { + (*_bfd_error_handler) (_("unknown header byte-order value 0x%lx"), + (unsigned long) header.byteorder); + goto wrong; + } + + 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))) + goto wrong; + + /* Check cputype and filetype. + In case of wildcard, do not accept magics that are handled by existing + targets. */ + if (cputype) + { + if (header.cputype != cputype) + goto wrong; + } + + if (filetype) + { + if (header.filetype != filetype) + goto wrong; + } + else + { + switch (header.filetype) + { + case BFD_MACH_O_MH_CORE: + /* Handled by core_p */ + goto wrong; + default: + break; + } + } + + mdata = (bfd_mach_o_data_struct *) bfd_zalloc (abfd, sizeof (*mdata)); + if (mdata == NULL) + goto fail; + + if (!bfd_mach_o_scan (abfd, &header, mdata)) + goto wrong; + + return abfd->xvec; + + wrong: + bfd_set_error (bfd_error_wrong_format); + + fail: + return NULL; +} + +static const bfd_target * +bfd_mach_o_gen_object_p (bfd *abfd) +{ + return bfd_mach_o_header_p (abfd, 0, 0); +} + +static const bfd_target * +bfd_mach_o_gen_core_p (bfd *abfd) +{ + return bfd_mach_o_header_p (abfd, BFD_MACH_O_MH_CORE, 0); +} + +typedef struct mach_o_fat_archentry +{ + unsigned long cputype; + unsigned long cpusubtype; + unsigned long offset; + unsigned long size; + unsigned long align; +} 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 (bfd *abfd) +{ + mach_o_fat_data_struct *adata = NULL; + struct mach_o_fat_header_external hdr; + unsigned long i; + + if (bfd_seek (abfd, 0, SEEK_SET) != 0 + || bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr)) + goto error; + + adata = bfd_alloc (abfd, sizeof (mach_o_fat_data_struct)); + if (adata == NULL) + goto error; + + adata->magic = bfd_getb32 (hdr.magic); + adata->nfat_arch = bfd_getb32 (hdr.nfat_arch); + if (adata->magic != 0xcafebabe) + goto error; + /* Avoid matching Java bytecode files, which have the same magic number. + In the Java bytecode file format this field contains the JVM version, + which starts at 43.0. */ + if (adata->nfat_arch > 30) + goto error; + + adata->archentries = + bfd_alloc (abfd, adata->nfat_arch * sizeof (mach_o_fat_archentry)); + if (adata->archentries == NULL) + goto error; + + for (i = 0; i < adata->nfat_arch; i++) + { + struct mach_o_fat_arch_external arch; + if (bfd_bread (&arch, sizeof (arch), abfd) != sizeof (arch)) + goto error; + adata->archentries[i].cputype = bfd_getb32 (arch.cputype); + adata->archentries[i].cpusubtype = bfd_getb32 (arch.cpusubtype); + adata->archentries[i].offset = bfd_getb32 (arch.offset); + adata->archentries[i].size = bfd_getb32 (arch.size); + adata->archentries[i].align = bfd_getb32 (arch.align); + } + + abfd->tdata.mach_o_fat_data = adata; + return abfd->xvec; + + error: + if (adata != NULL) + bfd_release (abfd, adata); + bfd_set_error (bfd_error_wrong_format); + 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) +{ + mach_o_fat_data_struct *adata; + mach_o_fat_archentry *entry = NULL; + unsigned long i; + bfd *nbfd; + enum bfd_architecture arch_type; + unsigned long arch_subtype; + + adata = (mach_o_fat_data_struct *) archive->tdata.mach_o_fat_data; + BFD_ASSERT (adata != NULL); + + /* Find index of previous entry. */ + if (prev == NULL) + { + /* 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) + break; + } + + if (i == adata->nfat_arch) + { + /* Not found. */ + bfd_set_error (bfd_error_bad_value); + return NULL; + } + + /* Get next entry. */ + i++; + } + + if (i >= adata->nfat_arch) + { + bfd_set_error (bfd_error_no_more_archived_files); + return NULL; + } + + entry = &adata->archentries[i]; + nbfd = _bfd_new_bfd_contained_in (archive); + if (nbfd == NULL) + return NULL; + + bfd_mach_o_convert_architecture (entry->cputype, entry->cpusubtype, + &arch_type, &arch_subtype); + + 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, + const bfd_arch_info_type *arch) +{ + bfd *res; + mach_o_fat_data_struct *adata; + unsigned int i; + + if (bfd_check_format (abfd, format)) + { + if (bfd_get_arch_info (abfd) == arch) + return abfd; + return NULL; + } + if (!bfd_check_format (abfd, bfd_archive) + || abfd->xvec != &mach_o_fat_vec) + return NULL; + + /* This is a Mach-O fat image. */ + adata = (mach_o_fat_data_struct *) abfd->tdata.mach_o_fat_data; + BFD_ASSERT (adata != NULL); + + for (i = 0; i < adata->nfat_arch; i++) + { + struct mach_o_fat_archentry *e = &adata->archentries[i]; + enum bfd_architecture cpu_type; + unsigned long cpu_subtype; + + bfd_mach_o_convert_architecture (e->cputype, e->cpusubtype, + &cpu_type, &cpu_subtype); + if (cpu_type != arch->arch || cpu_subtype != arch->mach) + continue; + + /* The architecture is found. */ + res = _bfd_new_bfd_contained_in (abfd); + if (res == NULL) + return NULL; + + bfd_mach_o_fat_member_init (res, cpu_type, cpu_subtype, e); + + if (bfd_check_format (res, format)) + { + BFD_ASSERT (bfd_get_arch_info (res) == arch); + return res; + } + bfd_close (res); + return NULL; + } + + return NULL; +} + +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 = bfd_mach_o_get_data (abfd); + bfd_mach_o_load_command *ncmd = NULL; + unsigned int i, num; + + 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 (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; + } +} + +/* 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}, + { "mod_init_func_pointers", BFD_MACH_O_S_MOD_INIT_FUNC_POINTERS}, + { "mod_fini_func_pointers", BFD_MACH_O_S_MOD_FINI_FUNC_POINTERS}, + { "gb_zerofill", BFD_MACH_O_S_GB_ZEROFILL}, + { "interposing", BFD_MACH_O_S_INTERPOSING}, + { "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 }, + { "debug", BFD_MACH_O_S_ATTR_DEBUG }, + { "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 }, + { "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 (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) + { + /* 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; +} + +/* Get the section attribute from NAME. Return -1 if NAME is unknown. */ + +unsigned int +bfd_mach_o_get_section_attribute_from_name (const char *name) +{ + const bfd_mach_o_xlat_name *x; + + for (x = bfd_mach_o_section_attribute_name; x->name; x++) + if (strcmp (x->name, name) == 0) + return x->val; + return (unsigned int)-1; +} + +int +bfd_mach_o_core_fetch_environment (bfd *abfd, + unsigned char **rbuf, + unsigned int *rlen) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + 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_or_free (buf, size); + if (buf == NULL) + return -1; + + if (bfd_seek (abfd, end - size, SEEK_SET) != 0) + { + free (buf); + return -1; + } + + nread = bfd_bread (buf, size, abfd); + + if (nread != size) + { + free (buf); + return -1; + } + + for (offset = 4; offset <= size; offset += 4) + { + unsigned long val; + + val = *((unsigned long *) (buf + size - offset)); + if (! found_nonnull) + { + if (val != 0) + found_nonnull = 1; + } + else if (val == 0x0) + { + unsigned long bottom; + unsigned long top; + + bottom = seg->fileoff + seg->filesize - offset; + top = seg->fileoff + seg->filesize - 4; + *rbuf = bfd_malloc (top - bottom); + *rlen = top - bottom; + + memcpy (*rbuf, buf + size - *rlen, *rlen); + free (buf); + return 0; + } + } + + if (size == (end - start)) + break; + + size *= 2; + } + + free (buf); + } + } + + return -1; +} + +char * +bfd_mach_o_core_file_failing_command (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 (char *) buf; +} + +int +bfd_mach_o_core_file_failing_signal (bfd *abfd ATTRIBUTE_UNUSED) +{ + 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, + asymbol **symbols, + bfd_vma offset, + const char **filename_ptr, + const char **functionname_ptr, + unsigned int *line_ptr) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + 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, NULL, 0, + &mdata->dwarf2_find_line_info)) + return TRUE; + return FALSE; +} + +bfd_boolean +bfd_mach_o_close_and_cleanup (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + if (bfd_get_format (abfd) == bfd_object && mdata != NULL) + { + _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); +} + +bfd_boolean bfd_mach_o_free_cached_info (bfd *abfd) +{ + bfd_mach_o_data_struct *mdata = bfd_mach_o_get_data (abfd); + asection *asect; + free (mdata->dyn_reloc_cache); + mdata->dyn_reloc_cache = NULL; + for (asect = abfd->sections; asect != NULL; asect = asect->next) + { + free (asect->relocation); + asect->relocation = NULL; + } + + return TRUE; +} + +#define bfd_mach_o_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup +#define bfd_mach_o_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup + +#define bfd_mach_o_swap_reloc_in NULL +#define bfd_mach_o_swap_reloc_out NULL +#define 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_STRING +#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_NAME +#undef TARGET_STRING +#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 + +/* Not used. */ +#define bfd_mach_o_read_ar_hdr _bfd_noarchive_read_ar_hdr +#define bfd_mach_o_write_ar_hdr _bfd_noarchive_write_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_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_STRING "mach-o-fat" +#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_NAME +#undef TARGET_STRING +#undef TARGET_ARCHITECTURE +#undef TARGET_BIG_ENDIAN +#undef TARGET_ARCHIVE +#undef TARGET_PRIORITY |