| /* Darwin support for GDB, the GNU debugger. |
| Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc. |
| |
| Contributed by AdaCore. |
| |
| This file is part of GDB. |
| |
| 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, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "defs.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "bfd.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "buildsym.h" |
| #include "gdbcmd.h" |
| #include "gdbcore.h" |
| #include "mach-o.h" |
| #include "gdb_assert.h" |
| #include "aout/stab_gnu.h" |
| #include "vec.h" |
| |
| #include <string.h> |
| |
| /* If non-zero displays debugging message. */ |
| static int mach_o_debug_level = 0; |
| |
| /* Dwarf debugging information are never in the final executable. They stay |
| in object files and the executable contains the list of object files read |
| during the link. |
| Each time an oso (other source) is found in the executable, the reader |
| creates such a structure. They are read after the processing of the |
| executable. |
| */ |
| typedef struct oso_el |
| { |
| /* Object file name. */ |
| const char *name; |
| |
| /* Associated time stamp. */ |
| unsigned long mtime; |
| |
| /* Number of sections. This is the length of SYMBOLS and OFFSETS array. */ |
| int num_sections; |
| |
| /* Each seaction of the object file is represented by a symbol and its |
| offset. If the offset is 0, we assume that the symbol is at offset 0 |
| in the OSO object file and a symbol lookup in the main file is |
| required to get the offset. */ |
| asymbol **symbols; |
| bfd_vma *offsets; |
| } |
| oso_el; |
| |
| /* Vector of object files to be read after the executable. This is one |
| global variable but it's life-time is the one of macho_symfile_read. */ |
| DEF_VEC_O (oso_el); |
| static VEC (oso_el) *oso_vector; |
| |
| struct macho_oso_data |
| { |
| /* Per objfile symbol table. This is used to apply relocation to sections |
| It is loaded only once, then relocated, and free after sections are |
| relocated. */ |
| asymbol **symbol_table; |
| |
| /* The offsets for this objfile. Used to relocate the symbol_table. */ |
| struct oso_el *oso; |
| |
| struct objfile *main_objfile; |
| }; |
| |
| /* Data for OSO being processed. */ |
| |
| static struct macho_oso_data current_oso; |
| |
| static void |
| macho_new_init (struct objfile *objfile) |
| { |
| } |
| |
| static void |
| macho_symfile_init (struct objfile *objfile) |
| { |
| objfile->flags |= OBJF_REORDERED; |
| init_entry_point_info (objfile); |
| } |
| |
| /* Add a new OSO to the vector of OSO to load. */ |
| |
| static void |
| macho_register_oso (const asymbol *oso_sym, int nbr_sections, |
| asymbol **symbols, bfd_vma *offsets) |
| { |
| oso_el el; |
| |
| el.name = oso_sym->name; |
| el.mtime = oso_sym->value; |
| el.num_sections = nbr_sections; |
| el.symbols = symbols; |
| el.offsets = offsets; |
| VEC_safe_push (oso_el, oso_vector, &el); |
| } |
| |
| /* Build the minimal symbol table from SYMBOL_TABLE of length |
| NUMBER_OF_SYMBOLS for OBJFILE. |
| Read OSO files at the end. */ |
| |
| static void |
| macho_symtab_read (struct objfile *objfile, |
| long number_of_symbols, asymbol **symbol_table) |
| { |
| struct gdbarch *gdbarch = get_objfile_arch (objfile); |
| long storage_needed; |
| long i, j; |
| CORE_ADDR offset; |
| enum minimal_symbol_type ms_type; |
| unsigned int nbr_sections = bfd_count_sections (objfile->obfd); |
| asymbol **first_symbol = NULL; |
| bfd_vma *first_offset = NULL; |
| const asymbol *oso_file = NULL; |
| |
| for (i = 0; i < number_of_symbols; i++) |
| { |
| asymbol *sym = symbol_table[i]; |
| bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; |
| |
| offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
| |
| if (sym->flags & BSF_DEBUGGING) |
| { |
| bfd_vma addr; |
| |
| /* Debugging symbols are used to collect OSO file names as well |
| as section offsets. */ |
| |
| switch (mach_o_sym->n_type) |
| { |
| case N_SO: |
| /* An empty SO entry terminates a chunk for an OSO file. */ |
| if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL) |
| { |
| macho_register_oso (oso_file, nbr_sections, |
| first_symbol, first_offset); |
| first_symbol = NULL; |
| first_offset = NULL; |
| oso_file = NULL; |
| } |
| break; |
| case N_FUN: |
| case N_STSYM: |
| if (sym->name == NULL || sym->name[0] == '\0') |
| break; |
| /* Fall through. */ |
| case N_BNSYM: |
| gdb_assert (oso_file != NULL); |
| addr = sym->value |
| + bfd_get_section_vma (sym->section->bfd, sym->section); |
| if (addr != 0 |
| && first_symbol[sym->section->index] == NULL) |
| { |
| /* These STAB entries can directly relocate a section. */ |
| first_symbol[sym->section->index] = sym; |
| first_offset[sym->section->index] = addr + offset; |
| } |
| break; |
| case N_GSYM: |
| gdb_assert (oso_file != NULL); |
| if (first_symbol[sym->section->index] == NULL) |
| { |
| /* This STAB entry needs a symbol look-up to relocate |
| the section. */ |
| first_symbol[sym->section->index] = sym; |
| first_offset[sym->section->index] = 0; |
| } |
| break; |
| case N_OSO: |
| /* New OSO file. */ |
| gdb_assert (oso_file == NULL); |
| first_symbol = (asymbol **)xmalloc (nbr_sections |
| * sizeof (asymbol *)); |
| first_offset = (bfd_vma *)xmalloc (nbr_sections |
| * sizeof (bfd_vma)); |
| for (j = 0; j < nbr_sections; j++) |
| first_symbol[j] = NULL; |
| oso_file = sym; |
| break; |
| } |
| continue; |
| } |
| |
| if (sym->name == NULL || *sym->name == '\0') |
| { |
| /* Skip names that don't exist (shouldn't happen), or names |
| that are null strings (may happen). */ |
| continue; |
| } |
| |
| if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) |
| { |
| struct minimal_symbol *msym; |
| CORE_ADDR symaddr; |
| |
| /* Bfd symbols are section relative. */ |
| symaddr = sym->value + sym->section->vma; |
| |
| /* Select global/local/weak symbols. Note that bfd puts abs |
| symbols in their own section, so all symbols we are |
| interested in will have a section. */ |
| /* Relocate all non-absolute and non-TLS symbols by the |
| section offset. */ |
| if (sym->section != &bfd_abs_section |
| && !(sym->section->flags & SEC_THREAD_LOCAL)) |
| symaddr += offset; |
| |
| if (sym->section == &bfd_abs_section) |
| ms_type = mst_abs; |
| else if (sym->section->flags & SEC_CODE) |
| { |
| if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
| ms_type = mst_text; |
| else |
| ms_type = mst_file_text; |
| } |
| else if (sym->section->flags & SEC_ALLOC) |
| { |
| if (sym->flags & (BSF_GLOBAL | BSF_WEAK)) |
| { |
| if (sym->section->flags & SEC_LOAD) |
| ms_type = mst_data; |
| else |
| ms_type = mst_bss; |
| } |
| else if (sym->flags & BSF_LOCAL) |
| { |
| /* Not a special stabs-in-elf symbol, do regular |
| symbol processing. */ |
| if (sym->section->flags & SEC_LOAD) |
| ms_type = mst_file_data; |
| else |
| ms_type = mst_file_bss; |
| } |
| else |
| ms_type = mst_unknown; |
| } |
| else |
| continue; /* Skip this symbol. */ |
| |
| gdb_assert (sym->section->index < nbr_sections); |
| if (oso_file != NULL |
| && first_symbol[sym->section->index] == NULL) |
| { |
| /* Standard symbols can directly relocate sections. */ |
| first_symbol[sym->section->index] = sym; |
| first_offset[sym->section->index] = symaddr; |
| } |
| |
| msym = prim_record_minimal_symbol_and_info |
| (sym->name, symaddr, ms_type, sym->section->index, |
| sym->section, objfile); |
| } |
| } |
| |
| /* Just in case there is no trailing SO entry. */ |
| if (oso_file != NULL) |
| macho_register_oso (oso_file, nbr_sections, first_symbol, first_offset); |
| } |
| |
| /* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'), |
| returns the length of the archive name. |
| Returns -1 otherwise. */ |
| |
| static int |
| get_archive_prefix_len (const char *name) |
| { |
| char *lparen; |
| int name_len = strlen (name); |
| |
| if (name_len == 0 || name[name_len - 1] != ')') |
| return -1; |
| |
| lparen = strrchr (name, '('); |
| if (lparen == NULL || lparen == name) |
| return -1; |
| return lparen - name; |
| } |
| |
| static int |
| oso_el_compare_name (const void *vl, const void *vr) |
| { |
| const oso_el *l = (const oso_el *)vl; |
| const oso_el *r = (const oso_el *)vr; |
| |
| return strcmp (l->name, r->name); |
| } |
| |
| /* Add an oso file as a symbol file. */ |
| |
| static void |
| macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
| struct objfile *main_objfile, int symfile_flags) |
| { |
| struct objfile *objfile; |
| int i; |
| char leading_char; |
| |
| if (mach_o_debug_level > 0) |
| printf_unfiltered (_("Loading symbols from oso: %s\n"), oso->name); |
| |
| if (!bfd_check_format (abfd, bfd_object)) |
| { |
| warning (_("`%s': can't read symbols: %s."), oso->name, |
| bfd_errmsg (bfd_get_error ())); |
| bfd_close (abfd); |
| return; |
| } |
| |
| bfd_set_cacheable (abfd, 1); |
| |
| /* Relocate sections. */ |
| |
| leading_char = bfd_get_symbol_leading_char (main_objfile->obfd); |
| |
| for (i = 0; i < oso->num_sections; i++) |
| { |
| asection *sect; |
| const char *sectname; |
| bfd_vma vma; |
| |
| /* Empty slot. */ |
| if (oso->symbols[i] == NULL) |
| continue; |
| |
| if (oso->offsets[i]) |
| vma = oso->offsets[i]; |
| else |
| { |
| struct minimal_symbol *msym; |
| const char *name = oso->symbols[i]->name; |
| |
| if (name[0] == leading_char) |
| ++name; |
| |
| if (mach_o_debug_level > 3) |
| printf_unfiltered (_("resolve sect %s with %s\n"), |
| oso->symbols[i]->section->name, |
| oso->symbols[i]->name); |
| msym = lookup_minimal_symbol (name, NULL, main_objfile); |
| if (msym == NULL) |
| { |
| warning (_("can't find symbol '%s' in minsymtab"), name); |
| continue; |
| } |
| else |
| vma = SYMBOL_VALUE_ADDRESS (msym); |
| } |
| sectname = (char *)oso->symbols[i]->section->name; |
| |
| sect = bfd_get_section_by_name (abfd, sectname); |
| if (sect == NULL) |
| { |
| warning (_("can't find section '%s' in OSO file %s"), |
| sectname, oso->name); |
| continue; |
| } |
| bfd_set_section_vma (abfd, sect, vma); |
| |
| if (mach_o_debug_level > 1) |
| printf_unfiltered (_(" %s: %s\n"), |
| core_addr_to_string (vma), sectname); |
| } |
| |
| /* Make sure that the filename was malloc'ed. The current filename comes |
| either from an OSO symbol name or from an archive name. Memory for both |
| is not managed by gdb. */ |
| abfd->filename = xstrdup (abfd->filename); |
| |
| gdb_assert (current_oso.symbol_table == NULL); |
| current_oso.main_objfile = main_objfile; |
| |
| /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
| from symfile.c:symbol_file_add_with_addrs_or_offsets. */ |
| objfile = symbol_file_add_from_bfd |
| (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
| main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
| | OBJF_READNOW | OBJF_USERLOADED)); |
| add_separate_debug_objfile (objfile, main_objfile); |
| |
| current_oso.main_objfile = NULL; |
| if (current_oso.symbol_table) |
| { |
| xfree (current_oso.symbol_table); |
| current_oso.symbol_table = NULL; |
| } |
| } |
| |
| /* Read symbols from the vector of oso files. */ |
| |
| static void |
| macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags) |
| { |
| int ix; |
| VEC (oso_el) *vec; |
| oso_el *oso; |
| |
| vec = oso_vector; |
| oso_vector = NULL; |
| |
| /* Sort oso by name so that files from libraries are gathered. */ |
| qsort (VEC_address (oso_el, vec), VEC_length (oso_el, vec), |
| sizeof (oso_el), oso_el_compare_name); |
| |
| for (ix = 0; VEC_iterate (oso_el, vec, ix, oso);) |
| { |
| int pfx_len; |
| |
| /* Check if this is a library name. */ |
| pfx_len = get_archive_prefix_len (oso->name); |
| if (pfx_len > 0) |
| { |
| bfd *archive_bfd; |
| bfd *member_bfd; |
| char *archive_name = XNEWVEC (char, pfx_len + 1); |
| int last_ix; |
| oso_el *oso2; |
| int ix2; |
| |
| memcpy (archive_name, oso->name, pfx_len); |
| archive_name[pfx_len] = '\0'; |
| |
| /* Compute number of oso for this archive. */ |
| for (last_ix = ix; |
| VEC_iterate (oso_el, vec, last_ix, oso2); last_ix++) |
| { |
| if (strncmp (oso2->name, archive_name, pfx_len) != 0) |
| break; |
| } |
| |
| /* Open the archive and check the format. */ |
| archive_bfd = bfd_openr (archive_name, gnutarget); |
| if (archive_bfd == NULL) |
| { |
| warning (_("Could not open OSO archive file \"%s\""), |
| archive_name); |
| ix = last_ix; |
| continue; |
| } |
| if (!bfd_check_format (archive_bfd, bfd_archive)) |
| { |
| warning (_("OSO archive file \"%s\" not an archive."), |
| archive_name); |
| bfd_close (archive_bfd); |
| ix = last_ix; |
| continue; |
| } |
| member_bfd = bfd_openr_next_archived_file (archive_bfd, NULL); |
| |
| if (member_bfd == NULL) |
| { |
| warning (_("Could not read archive members out of " |
| "OSO archive \"%s\""), archive_name); |
| bfd_close (archive_bfd); |
| ix = last_ix; |
| continue; |
| } |
| |
| /* Load all oso in this library. */ |
| while (member_bfd != NULL) |
| { |
| bfd *prev; |
| const char *member_name = member_bfd->filename; |
| int member_len = strlen (member_name); |
| |
| /* If this member is referenced, add it as a symfile. */ |
| for (ix2 = ix; ix2 < last_ix; ix2++) |
| { |
| oso2 = VEC_index (oso_el, vec, ix2); |
| |
| if (oso2->name |
| && strlen (oso2->name) == pfx_len + member_len + 2 |
| && !memcmp (member_name, oso2->name + pfx_len + 1, |
| member_len)) |
| { |
| macho_add_oso_symfile (oso2, member_bfd, |
| main_objfile, symfile_flags); |
| oso2->name = NULL; |
| break; |
| } |
| } |
| |
| prev = member_bfd; |
| member_bfd = bfd_openr_next_archived_file |
| (archive_bfd, member_bfd); |
| |
| /* Free previous member if not referenced by an oso. */ |
| if (ix2 >= last_ix) |
| bfd_close (prev); |
| } |
| for (ix2 = ix; ix2 < last_ix; ix2++) |
| { |
| oso_el *oso2 = VEC_index (oso_el, vec, ix2); |
| |
| if (oso2->name != NULL) |
| warning (_("Could not find specified archive member " |
| "for OSO name \"%s\""), oso->name); |
| } |
| ix = last_ix; |
| } |
| else |
| { |
| bfd *abfd; |
| |
| abfd = bfd_openr (oso->name, gnutarget); |
| if (!abfd) |
| warning (_("`%s': can't open to read symbols: %s."), oso->name, |
| bfd_errmsg (bfd_get_error ())); |
| else |
| macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags); |
| |
| ix++; |
| } |
| } |
| |
| for (ix = 0; VEC_iterate (oso_el, vec, ix, oso); ix++) |
| { |
| xfree (oso->symbols); |
| xfree (oso->offsets); |
| } |
| VEC_free (oso_el, vec); |
| } |
| |
| /* DSYM (debug symbols) files contain the debug info of an executable. |
| This is a separate file created by dsymutil(1) and is similar to debug |
| link feature on ELF. |
| DSYM files are located in a subdirectory. Append DSYM_SUFFIX to the |
| executable name and the executable base name to get the DSYM file name. */ |
| #define DSYM_SUFFIX ".dSYM/Contents/Resources/DWARF/" |
| |
| /* Check if a dsym file exists for OBJFILE. If so, returns a bfd for it. |
| Return NULL if no valid dsym file is found. */ |
| |
| static bfd * |
| macho_check_dsym (struct objfile *objfile) |
| { |
| size_t name_len = strlen (objfile->name); |
| size_t dsym_len = strlen (DSYM_SUFFIX); |
| const char *base_name = lbasename (objfile->name); |
| size_t base_len = strlen (base_name); |
| char *dsym_filename = alloca (name_len + dsym_len + base_len + 1); |
| bfd *dsym_bfd; |
| bfd_mach_o_load_command *main_uuid; |
| bfd_mach_o_load_command *dsym_uuid; |
| |
| strcpy (dsym_filename, objfile->name); |
| strcpy (dsym_filename + name_len, DSYM_SUFFIX); |
| strcpy (dsym_filename + name_len + dsym_len, base_name); |
| |
| if (access (dsym_filename, R_OK) != 0) |
| return NULL; |
| |
| if (bfd_mach_o_lookup_command (objfile->obfd, |
| BFD_MACH_O_LC_UUID, &main_uuid) == 0) |
| { |
| warning (_("can't find UUID in %s"), objfile->name); |
| return NULL; |
| } |
| dsym_filename = xstrdup (dsym_filename); |
| dsym_bfd = bfd_openr (dsym_filename, gnutarget); |
| if (dsym_bfd == NULL) |
| { |
| warning (_("can't open dsym file %s"), dsym_filename); |
| xfree (dsym_filename); |
| return NULL; |
| } |
| |
| if (!bfd_check_format (dsym_bfd, bfd_object)) |
| { |
| bfd_close (dsym_bfd); |
| warning (_("bad dsym file format: %s"), bfd_errmsg (bfd_get_error ())); |
| xfree (dsym_filename); |
| return NULL; |
| } |
| |
| if (bfd_mach_o_lookup_command (dsym_bfd, |
| BFD_MACH_O_LC_UUID, &dsym_uuid) == 0) |
| { |
| warning (_("can't find UUID in %s"), dsym_filename); |
| bfd_close (dsym_bfd); |
| xfree (dsym_filename); |
| return NULL; |
| } |
| if (memcmp (dsym_uuid->command.uuid.uuid, main_uuid->command.uuid.uuid, |
| sizeof (main_uuid->command.uuid.uuid))) |
| { |
| warning (_("dsym file UUID doesn't match the one in %s"), objfile->name); |
| bfd_close (dsym_bfd); |
| xfree (dsym_filename); |
| return NULL; |
| } |
| return dsym_bfd; |
| } |
| |
| static void |
| macho_symfile_read (struct objfile *objfile, int symfile_flags) |
| { |
| bfd *abfd = objfile->obfd; |
| struct cleanup *back_to; |
| CORE_ADDR offset; |
| long storage_needed; |
| bfd *dsym_bfd; |
| |
| init_minimal_symbol_collection (); |
| back_to = make_cleanup_discard_minimal_symbols (); |
| |
| /* Get symbols from the symbol table only if the file is an executable. |
| The symbol table of object files is not relocated and is expected to |
| be in the executable. */ |
| if (bfd_get_file_flags (abfd) & (EXEC_P | DYNAMIC)) |
| { |
| /* Process the normal symbol table first. */ |
| storage_needed = bfd_get_symtab_upper_bound (objfile->obfd); |
| if (storage_needed < 0) |
| error (_("Can't read symbols from %s: %s"), |
| bfd_get_filename (objfile->obfd), |
| bfd_errmsg (bfd_get_error ())); |
| |
| if (storage_needed > 0) |
| { |
| asymbol **symbol_table; |
| long symcount; |
| |
| symbol_table = (asymbol **) xmalloc (storage_needed); |
| make_cleanup (xfree, symbol_table); |
| symcount = bfd_canonicalize_symtab (objfile->obfd, symbol_table); |
| |
| if (symcount < 0) |
| error (_("Can't read symbols from %s: %s"), |
| bfd_get_filename (objfile->obfd), |
| bfd_errmsg (bfd_get_error ())); |
| |
| macho_symtab_read (objfile, symcount, symbol_table); |
| } |
| |
| install_minimal_symbols (objfile); |
| |
| /* Try to read .eh_frame / .debug_frame. */ |
| /* First, locate these sections. We ignore the result status |
| as it only checks for debug info. */ |
| dwarf2_has_info (objfile); |
| dwarf2_build_frame_info (objfile); |
| |
| /* Check for DSYM file. */ |
| dsym_bfd = macho_check_dsym (objfile); |
| if (dsym_bfd != NULL) |
| { |
| int ix; |
| oso_el *oso; |
| struct bfd_section *asect, *dsect; |
| |
| if (mach_o_debug_level > 0) |
| printf_unfiltered (_("dsym file found\n")); |
| |
| /* Remove oso. They won't be used. */ |
| for (ix = 0; VEC_iterate (oso_el, oso_vector, ix, oso); ix++) |
| { |
| xfree (oso->symbols); |
| xfree (oso->offsets); |
| } |
| VEC_free (oso_el, oso_vector); |
| oso_vector = NULL; |
| |
| /* Set dsym section size. */ |
| for (asect = objfile->obfd->sections, dsect = dsym_bfd->sections; |
| asect && dsect; |
| asect = asect->next, dsect = dsect->next) |
| { |
| if (strcmp (asect->name, dsect->name) != 0) |
| break; |
| bfd_set_section_size (dsym_bfd, dsect, |
| bfd_get_section_size (asect)); |
| } |
| |
| /* Add the dsym file as a separate file. */ |
| symbol_file_add_separate (dsym_bfd, symfile_flags, objfile); |
| |
| /* Don't try to read dwarf2 from main file or shared libraries. */ |
| return; |
| } |
| } |
| |
| if (dwarf2_has_info (objfile)) |
| { |
| /* DWARF 2 sections */ |
| dwarf2_build_psymtabs (objfile); |
| } |
| |
| /* Do not try to read .eh_frame/.debug_frame as they are not relocated |
| and dwarf2_build_frame_info cannot deal with unrelocated sections. */ |
| |
| /* Then the oso. */ |
| if (oso_vector != NULL) |
| macho_symfile_read_all_oso (objfile, symfile_flags); |
| } |
| |
| static bfd_byte * |
| macho_symfile_relocate (struct objfile *objfile, asection *sectp, |
| bfd_byte *buf) |
| { |
| bfd *abfd = objfile->obfd; |
| |
| /* We're only interested in sections with relocation |
| information. */ |
| if ((sectp->flags & SEC_RELOC) == 0) |
| return NULL; |
| |
| if (mach_o_debug_level > 0) |
| printf_unfiltered (_("Relocate section '%s' of %s\n"), |
| sectp->name, objfile->name); |
| |
| if (current_oso.symbol_table == NULL) |
| { |
| int storage; |
| int i; |
| char leading_char; |
| |
| storage = bfd_get_symtab_upper_bound (abfd); |
| current_oso.symbol_table = (asymbol **) xmalloc (storage); |
| bfd_canonicalize_symtab (abfd, current_oso.symbol_table); |
| |
| leading_char = bfd_get_symbol_leading_char (abfd); |
| |
| for (i = 0; current_oso.symbol_table[i]; i++) |
| { |
| asymbol *sym = current_oso.symbol_table[i]; |
| |
| if (bfd_is_com_section (sym->section)) |
| { |
| /* This one must be solved. */ |
| struct minimal_symbol *msym; |
| const char *name = sym->name; |
| |
| if (name[0] == leading_char) |
| name++; |
| |
| msym = lookup_minimal_symbol |
| (name, NULL, current_oso.main_objfile); |
| if (msym == NULL) |
| { |
| warning (_("can't find symbol '%s' in minsymtab"), name); |
| continue; |
| } |
| else |
| { |
| sym->section = &bfd_abs_section; |
| sym->value = SYMBOL_VALUE_ADDRESS (msym); |
| } |
| } |
| } |
| } |
| |
| return bfd_simple_get_relocated_section_contents (abfd, sectp, buf, NULL); |
| } |
| |
| static void |
| macho_symfile_finish (struct objfile *objfile) |
| { |
| } |
| |
| static void |
| macho_symfile_offsets (struct objfile *objfile, |
| struct section_addr_info *addrs) |
| { |
| unsigned int i; |
| unsigned int num_sections; |
| struct obj_section *osect; |
| |
| /* Allocate section_offsets. */ |
| objfile->num_sections = bfd_count_sections (objfile->obfd); |
| objfile->section_offsets = (struct section_offsets *) |
| obstack_alloc (&objfile->objfile_obstack, |
| SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| memset (objfile->section_offsets, 0, |
| SIZEOF_N_SECTION_OFFSETS (objfile->num_sections)); |
| |
| /* This code is run when we first add the objfile with |
| symfile_add_with_addrs_or_offsets, when "addrs" not "offsets" are |
| passed in. The place in symfile.c where the addrs are applied |
| depends on the addrs having section names. But in the dyld code |
| we build an anonymous array of addrs, so that code is a no-op. |
| Because of that, we have to apply the addrs to the sections here. |
| N.B. if an objfile slides after we've already created it, then it |
| goes through objfile_relocate. */ |
| |
| for (i = 0; i < addrs->num_sections; i++) |
| { |
| if (addrs->other[i].name == NULL) |
| continue; |
| |
| ALL_OBJFILE_OSECTIONS (objfile, osect) |
| { |
| const char *bfd_sect_name = osect->the_bfd_section->name; |
| |
| if (strcmp (bfd_sect_name, addrs->other[i].name) == 0) |
| { |
| obj_section_offset (osect) = addrs->other[i].addr; |
| break; |
| } |
| } |
| } |
| |
| objfile->sect_index_text = 0; |
| |
| ALL_OBJFILE_OSECTIONS (objfile, osect) |
| { |
| const char *bfd_sect_name = osect->the_bfd_section->name; |
| int sect_index = osect->the_bfd_section->index; |
| |
| if (strncmp (bfd_sect_name, "LC_SEGMENT.", 11) == 0) |
| bfd_sect_name += 11; |
| if (strcmp (bfd_sect_name, "__TEXT") == 0 |
| || strcmp (bfd_sect_name, "__TEXT.__text") == 0) |
| objfile->sect_index_text = sect_index; |
| } |
| } |
| |
| static struct sym_fns macho_sym_fns = { |
| bfd_target_mach_o_flavour, |
| |
| macho_new_init, /* sym_new_init: init anything gbl to entire symtab */ |
| macho_symfile_init, /* sym_init: read initial info, setup for sym_read() */ |
| macho_symfile_read, /* sym_read: read a symbol file into symtab */ |
| macho_symfile_finish, /* sym_finish: finished with file, cleanup */ |
| macho_symfile_offsets, /* sym_offsets: xlate external to internal form */ |
| default_symfile_segments, /* sym_segments: Get segment information from |
| a file. */ |
| NULL, /* sym_read_linetable */ |
| macho_symfile_relocate, /* sym_relocate: Relocate a debug section. */ |
| |
| NULL /* next: pointer to next struct sym_fns */ |
| }; |
| |
| void |
| _initialize_machoread () |
| { |
| add_symtab_fns (&macho_sym_fns); |
| |
| add_setshow_zinteger_cmd ("mach-o", class_obscure, |
| &mach_o_debug_level, _("\ |
| Set if printing Mach-O symbols processing."), _("\ |
| Show if printing Mach-O symbols processing."), NULL, |
| NULL, NULL, |
| &setdebuglist, &showdebuglist); |
| } |
