| /* Darwin support for GDB, the GNU debugger. |
| Copyright (C) 2008-2012 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 "psympriv.h" |
| #include "complaints.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. Can also be a member name. */ |
| const char *name; |
| |
| /* Associated time stamp. */ |
| unsigned long mtime; |
| |
| /* Stab symbols range for this OSO. */ |
| asymbol **oso_sym; |
| asymbol **end_sym; |
| |
| /* Number of interesting stabs in the range. */ |
| unsigned int nbr_syms; |
| } |
| 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; |
| |
| 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 (struct objfile *objfile, |
| asymbol **oso_sym, asymbol **end_sym, |
| unsigned int nbr_syms) |
| { |
| oso_el el; |
| |
| el.name = (*oso_sym)->name; |
| el.mtime = (*oso_sym)->value; |
| el.oso_sym = oso_sym; |
| el.end_sym = end_sym; |
| el.nbr_syms = nbr_syms; |
| VEC_safe_push (oso_el, oso_vector, &el); |
| } |
| |
| /* Add symbol SYM to the minimal symbol table of OBJFILE. */ |
| |
| static void |
| macho_symtab_add_minsym (struct objfile *objfile, const asymbol *sym) |
| { |
| if (sym->name == NULL || *sym->name == '\0') |
| { |
| /* Skip names that don't exist (shouldn't happen), or names |
| that are null strings (may happen). */ |
| return; |
| } |
| |
| if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK)) |
| { |
| CORE_ADDR symaddr; |
| CORE_ADDR offset; |
| enum minimal_symbol_type ms_type; |
| |
| offset = ANOFFSET (objfile->section_offsets, sym->section->index); |
| |
| /* 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_ptr |
| && !(sym->section->flags & SEC_THREAD_LOCAL)) |
| symaddr += offset; |
| |
| if (sym->section == bfd_abs_section_ptr) |
| 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 |
| return; /* Skip this symbol. */ |
| |
| prim_record_minimal_symbol_and_info |
| (sym->name, symaddr, ms_type, sym->section->index, |
| sym->section, objfile); |
| } |
| } |
| |
| /* Build the minimal symbol table from SYMBOL_TABLE of length |
| NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */ |
| |
| static void |
| macho_symtab_read (struct objfile *objfile, |
| long number_of_symbols, asymbol **symbol_table) |
| { |
| long i; |
| const asymbol *dir_so = NULL; |
| const asymbol *file_so = NULL; |
| asymbol **oso_file = NULL; |
| unsigned int nbr_syms = 0; |
| |
| /* Current state while reading stabs. */ |
| enum |
| { |
| /* Not within an SO part. Only non-debugging symbols should be present, |
| and will be added to the minimal symbols table. */ |
| S_NO_SO, |
| |
| /* First SO read. Introduce an SO section, and may be followed by a second |
| SO. The SO section should contain onl debugging symbols. */ |
| S_FIRST_SO, |
| |
| /* Second non-null SO found, just after the first one. Means that the first |
| is in fact a directory name. */ |
| S_SECOND_SO, |
| |
| /* Non-null OSO found. Debugging info are DWARF in this OSO file. */ |
| S_DWARF_FILE, |
| |
| S_STAB_FILE |
| } state = S_NO_SO; |
| |
| for (i = 0; i < number_of_symbols; i++) |
| { |
| const asymbol *sym = symbol_table[i]; |
| bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; |
| |
| switch (state) |
| { |
| case S_NO_SO: |
| if (mach_o_sym->n_type == N_SO) |
| { |
| /* Start of object stab. */ |
| if (sym->name == NULL || sym->name[0] == 0) |
| { |
| /* Unexpected empty N_SO. */ |
| complaint (&symfile_complaints, |
| _("Unexpected empty N_SO stab")); |
| } |
| else |
| { |
| file_so = sym; |
| dir_so = NULL; |
| state = S_FIRST_SO; |
| } |
| } |
| else if (sym->flags & BSF_DEBUGGING) |
| { |
| if (mach_o_sym->n_type == N_OPT) |
| { |
| /* No complaint for OPT. */ |
| break; |
| } |
| |
| /* Debugging symbols are not expected here. */ |
| complaint (&symfile_complaints, |
| _("%s: Unexpected debug stab outside SO markers"), |
| objfile->name); |
| } |
| else |
| { |
| /* Non-debugging symbols go to the minimal symbol table. */ |
| macho_symtab_add_minsym (objfile, sym); |
| } |
| break; |
| |
| case S_FIRST_SO: |
| case S_SECOND_SO: |
| if (mach_o_sym->n_type == N_SO) |
| { |
| if (sym->name == NULL || sym->name[0] == 0) |
| { |
| /* Unexpected empty N_SO. */ |
| complaint (&symfile_complaints, _("Empty SO section")); |
| state = S_NO_SO; |
| } |
| else if (state == S_FIRST_SO) |
| { |
| /* Second SO stab for the file name. */ |
| dir_so = file_so; |
| file_so = sym; |
| state = S_SECOND_SO; |
| } |
| else |
| complaint (&symfile_complaints, _("Three SO in a raw")); |
| } |
| else if (mach_o_sym->n_type == N_OSO) |
| { |
| if (sym->name == NULL || sym->name[0] == 0) |
| { |
| /* Empty OSO. Means that this file was compiled with |
| stabs. */ |
| state = S_STAB_FILE; |
| warning (_("stabs debugging not supported for %s"), |
| file_so->name); |
| } |
| else |
| { |
| /* Non-empty OSO for a Dwarf file. */ |
| oso_file = symbol_table + i; |
| nbr_syms = 0; |
| state = S_DWARF_FILE; |
| } |
| } |
| else |
| complaint (&symfile_complaints, |
| _("Unexpected stab after SO")); |
| break; |
| |
| case S_STAB_FILE: |
| case S_DWARF_FILE: |
| if (mach_o_sym->n_type == N_SO) |
| { |
| if (sym->name == NULL || sym->name[0] == 0) |
| { |
| /* End of file. */ |
| if (state == S_DWARF_FILE) |
| macho_register_oso (objfile, oso_file, symbol_table + i, |
| nbr_syms); |
| state = S_NO_SO; |
| } |
| else |
| { |
| complaint (&symfile_complaints, _("Missing nul SO")); |
| file_so = sym; |
| dir_so = NULL; |
| state = S_FIRST_SO; |
| } |
| } |
| else if (sym->flags & BSF_DEBUGGING) |
| { |
| if (state == S_STAB_FILE) |
| { |
| /* FIXME: to be implemented. */ |
| } |
| else |
| { |
| switch (mach_o_sym->n_type) |
| { |
| case N_FUN: |
| if (sym->name == NULL || sym->name[0] == 0) |
| break; |
| /* Fall through. */ |
| case N_STSYM: |
| /* Interesting symbol. */ |
| nbr_syms++; |
| break; |
| case N_ENSYM: |
| case N_BNSYM: |
| case N_GSYM: |
| break; |
| default: |
| complaint (&symfile_complaints, |
| _("unhandled stab for dwarf OSO file")); |
| break; |
| } |
| } |
| } |
| else |
| complaint (&symfile_complaints, |
| _("non-debugging symbol within SO")); |
| break; |
| } |
| } |
| |
| if (state != S_NO_SO) |
| complaint (&symfile_complaints, _("missing nul SO")); |
| } |
| |
| /* 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; |
| } |
| |
| /* Compare function to qsort OSOs, so that members of a library are |
| gathered. */ |
| |
| 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); |
| } |
| |
| /* Hash table entry structure for the stabs symbols in the main object file. |
| This is used to speed up lookup for symbols in the OSO. */ |
| |
| struct macho_sym_hash_entry |
| { |
| struct bfd_hash_entry base; |
| const asymbol *sym; |
| }; |
| |
| /* Routine to create an entry in the hash table. */ |
| |
| static struct bfd_hash_entry * |
| macho_sym_hash_newfunc (struct bfd_hash_entry *entry, |
| struct bfd_hash_table *table, |
| const char *string) |
| { |
| struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry; |
| |
| /* Allocate the structure if it has not already been allocated by a |
| subclass. */ |
| if (ret == NULL) |
| ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table, |
| sizeof (* ret)); |
| if (ret == NULL) |
| return NULL; |
| |
| /* Call the allocation method of the superclass. */ |
| ret = (struct macho_sym_hash_entry *) |
| bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string); |
| |
| if (ret) |
| { |
| /* Initialize the local fields. */ |
| ret->sym = NULL; |
| } |
| |
| return (struct bfd_hash_entry *) ret; |
| } |
| |
| /* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used |
| to get the value of global and common symbols. */ |
| |
| static CORE_ADDR |
| macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym) |
| { |
| /* For common symbol and global symbols, use the min symtab. */ |
| struct minimal_symbol *msym; |
| const char *name = sym->name; |
| |
| if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd)) |
| ++name; |
| msym = lookup_minimal_symbol (name, NULL, main_objfile); |
| if (msym == NULL) |
| { |
| warning (_("can't find symbol '%s' in minsymtab"), name); |
| return 0; |
| } |
| else |
| return SYMBOL_VALUE_ADDRESS (msym); |
| } |
| |
| /* Add oso file OSO/ABFD as a symbol file. */ |
| |
| static void |
| macho_add_oso_symfile (oso_el *oso, bfd *abfd, |
| struct objfile *main_objfile, int symfile_flags) |
| { |
| int storage; |
| int i; |
| asymbol **symbol_table; |
| asymbol **symp; |
| struct bfd_hash_table table; |
| int nbr_sections; |
| |
| /* Per section flag to mark which section have been rebased. */ |
| unsigned char *sections_rebased; |
| |
| if (mach_o_debug_level > 0) |
| printf_unfiltered |
| (_("Loading debugging 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; |
| } |
| |
| if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd)) |
| { |
| warning (_("`%s': file time stamp mismatch."), oso->name); |
| bfd_close (abfd); |
| return; |
| } |
| |
| if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc, |
| sizeof (struct macho_sym_hash_entry), |
| oso->nbr_syms)) |
| { |
| warning (_("`%s': can't create hash table"), oso->name); |
| bfd_close (abfd); |
| return; |
| } |
| |
| bfd_set_cacheable (abfd, 1); |
| |
| /* Read symbols table. */ |
| storage = bfd_get_symtab_upper_bound (abfd); |
| symbol_table = (asymbol **) xmalloc (storage); |
| bfd_canonicalize_symtab (abfd, symbol_table); |
| |
| /* Init section flags. */ |
| nbr_sections = bfd_count_sections (abfd); |
| sections_rebased = (unsigned char *) alloca (nbr_sections); |
| for (i = 0; i < nbr_sections; i++) |
| sections_rebased[i] = 0; |
| |
| /* Put symbols for the OSO file in the hash table. */ |
| for (symp = oso->oso_sym; symp != oso->end_sym; symp++) |
| { |
| const asymbol *sym = *symp; |
| bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; |
| |
| switch (mach_o_sym->n_type) |
| { |
| case N_ENSYM: |
| case N_BNSYM: |
| case N_GSYM: |
| sym = NULL; |
| break; |
| case N_FUN: |
| if (sym->name == NULL || sym->name[0] == 0) |
| sym = NULL; |
| break; |
| case N_STSYM: |
| break; |
| default: |
| sym = NULL; |
| break; |
| } |
| if (sym != NULL) |
| { |
| struct macho_sym_hash_entry *ent; |
| |
| ent = (struct macho_sym_hash_entry *) |
| bfd_hash_lookup (&table, sym->name, TRUE, FALSE); |
| if (ent->sym != NULL) |
| complaint (&symfile_complaints, |
| _("Duplicated symbol %s in symbol table"), sym->name); |
| else |
| { |
| if (mach_o_debug_level > 4) |
| { |
| struct gdbarch *arch = get_objfile_arch (main_objfile); |
| printf_unfiltered |
| (_("Adding symbol %s (addr: %s)\n"), |
| sym->name, paddress (arch, sym->value)); |
| } |
| ent->sym = sym; |
| } |
| } |
| } |
| |
| /* Relocate symbols of the OSO. */ |
| for (i = 0; symbol_table[i]; i++) |
| { |
| asymbol *sym = symbol_table[i]; |
| bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym; |
| |
| if (mach_o_sym->n_type & BFD_MACH_O_N_STAB) |
| continue; |
| if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_UNDF |
| && sym->value != 0) |
| { |
| /* For common symbol use the min symtab and modify the OSO |
| symbol table. */ |
| CORE_ADDR res; |
| |
| res = macho_resolve_oso_sym_with_minsym (main_objfile, sym); |
| if (res != 0) |
| { |
| sym->section = bfd_com_section_ptr; |
| sym->value = res; |
| } |
| } |
| else if ((mach_o_sym->n_type & BFD_MACH_O_N_TYPE) == BFD_MACH_O_N_SECT) |
| { |
| /* Normal symbol. */ |
| asection *sec = sym->section; |
| bfd_mach_o_section *msec; |
| unsigned int sec_type; |
| |
| /* Skip buggy ones. */ |
| if (sec == NULL || sections_rebased[sec->index] != 0) |
| continue; |
| |
| /* Only consider regular, non-debugging sections. */ |
| msec = bfd_mach_o_get_mach_o_section (sec); |
| sec_type = msec->flags & BFD_MACH_O_SECTION_TYPE_MASK; |
| if ((sec_type == BFD_MACH_O_S_REGULAR |
| || sec_type == BFD_MACH_O_S_ZEROFILL) |
| && (msec->flags & BFD_MACH_O_S_ATTR_DEBUG) == 0) |
| { |
| CORE_ADDR addr = 0; |
| |
| if ((mach_o_sym->n_type & BFD_MACH_O_N_EXT) != 0) |
| { |
| /* Use the min symtab for global symbols. */ |
| addr = macho_resolve_oso_sym_with_minsym (main_objfile, sym); |
| } |
| else |
| { |
| struct macho_sym_hash_entry *ent; |
| |
| ent = (struct macho_sym_hash_entry *) |
| bfd_hash_lookup (&table, sym->name, FALSE, FALSE); |
| if (ent != NULL) |
| addr = bfd_asymbol_value (ent->sym); |
| } |
| |
| /* Adjust the section. */ |
| if (addr != 0) |
| { |
| CORE_ADDR res = addr - sym->value; |
| |
| if (mach_o_debug_level > 3) |
| { |
| struct gdbarch *arch = get_objfile_arch (main_objfile); |
| printf_unfiltered |
| (_("resolve sect %s with %s (set to %s)\n"), |
| sec->name, sym->name, |
| paddress (arch, res)); |
| } |
| bfd_set_section_vma (abfd, sec, res); |
| sections_rebased[sec->index] = 1; |
| } |
| } |
| else |
| { |
| /* Mark the section as never rebased. */ |
| sections_rebased[sec->index] = 2; |
| } |
| } |
| } |
| |
| bfd_hash_table_free (&table); |
| |
| /* 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); |
| |
| /* We need to clear SYMFILE_MAINLINE to avoid interractive question |
| from symfile.c:symbol_file_add_with_addrs_or_offsets. */ |
| symbol_file_add_from_bfd |
| (abfd, symfile_flags & ~(SYMFILE_MAINLINE | SYMFILE_VERBOSE), NULL, |
| main_objfile->flags & (OBJF_REORDERED | OBJF_SHARED |
| | OBJF_READNOW | OBJF_USERLOADED), |
| main_objfile); |
| } |
| |
| /* 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++; |
| } |
| } |
| |
| 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; |
| CORE_ADDR offset; |
| long storage_needed; |
| bfd *dsym_bfd; |
| |
| /* 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; |
| struct cleanup *back_to; |
| |
| symbol_table = (asymbol **) xmalloc (storage_needed); |
| make_cleanup (xfree, symbol_table); |
| |
| init_minimal_symbol_collection (); |
| back_to = make_cleanup_discard_minimal_symbols (); |
| |
| 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); |
| do_cleanups (back_to); |
| } |
| |
| /* 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, NULL); |
| 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. */ |
| 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, NULL)) |
| { |
| /* DWARF 2 sections */ |
| dwarf2_build_psymtabs (objfile); |
| } |
| |
| /* 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); |
| |
| 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 const struct sym_fns macho_sym_fns = { |
| bfd_target_mach_o_flavour, |
| |
| macho_new_init, /* init anything gbl to entire symtab */ |
| macho_symfile_init, /* read initial info, setup for sym_read() */ |
| macho_symfile_read, /* read a symbol file into symtab */ |
| NULL, /* sym_read_psymbols */ |
| macho_symfile_finish, /* finished with file, cleanup */ |
| macho_symfile_offsets, /* xlate external to internal form */ |
| default_symfile_segments, /* Get segment information from a file. */ |
| NULL, |
| macho_symfile_relocate, /* Relocate a debug section. */ |
| NULL, /* sym_get_probes */ |
| &psym_functions |
| }; |
| |
| /* -Wmissing-prototypes */ |
| extern initialize_file_ftype _initialize_machoread; |
| |
| 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); |
| } |
