1050 lines
31 KiB
C
1050 lines
31 KiB
C
/* Darwin support for GDB, the GNU debugger.
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Copyright (C) 2008-2012 Free Software Foundation, Inc.
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Contributed by AdaCore.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "bfd.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "buildsym.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "mach-o.h"
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#include "gdb_assert.h"
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#include "aout/stab_gnu.h"
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#include "vec.h"
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#include "psympriv.h"
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#include "complaints.h"
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#include <string.h>
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/* If non-zero displays debugging message. */
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static int mach_o_debug_level = 0;
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/* Dwarf debugging information are never in the final executable. They stay
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in object files and the executable contains the list of object files read
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during the link.
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Each time an oso (other source) is found in the executable, the reader
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creates such a structure. They are read after the processing of the
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executable. */
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typedef struct oso_el
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{
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/* Object file name. Can also be a member name. */
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const char *name;
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/* Associated time stamp. */
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unsigned long mtime;
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/* Stab symbols range for this OSO. */
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asymbol **oso_sym;
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asymbol **end_sym;
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/* Number of interesting stabs in the range. */
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unsigned int nbr_syms;
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}
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oso_el;
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/* Vector of object files to be read after the executable. This is one
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global variable but it's life-time is the one of macho_symfile_read. */
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DEF_VEC_O (oso_el);
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static VEC (oso_el) *oso_vector;
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static void
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macho_new_init (struct objfile *objfile)
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{
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}
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static void
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macho_symfile_init (struct objfile *objfile)
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{
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objfile->flags |= OBJF_REORDERED;
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init_entry_point_info (objfile);
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}
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/* Add a new OSO to the vector of OSO to load. */
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static void
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macho_register_oso (struct objfile *objfile,
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asymbol **oso_sym, asymbol **end_sym,
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unsigned int nbr_syms)
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{
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oso_el el;
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el.name = (*oso_sym)->name;
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el.mtime = (*oso_sym)->value;
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el.oso_sym = oso_sym;
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el.end_sym = end_sym;
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el.nbr_syms = nbr_syms;
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VEC_safe_push (oso_el, oso_vector, &el);
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}
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/* Add symbol SYM to the minimal symbol table of OBJFILE. */
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static void
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macho_symtab_add_minsym (struct objfile *objfile, const asymbol *sym)
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{
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if (sym->name == NULL || *sym->name == '\0')
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{
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/* Skip names that don't exist (shouldn't happen), or names
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that are null strings (may happen). */
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return;
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}
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if (sym->flags & (BSF_GLOBAL | BSF_LOCAL | BSF_WEAK))
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{
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CORE_ADDR symaddr;
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CORE_ADDR offset;
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enum minimal_symbol_type ms_type;
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offset = ANOFFSET (objfile->section_offsets, sym->section->index);
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/* Bfd symbols are section relative. */
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symaddr = sym->value + sym->section->vma;
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/* Select global/local/weak symbols. Note that bfd puts abs
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symbols in their own section, so all symbols we are
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interested in will have a section. */
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/* Relocate all non-absolute and non-TLS symbols by the
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section offset. */
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if (sym->section != &bfd_abs_section
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&& !(sym->section->flags & SEC_THREAD_LOCAL))
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symaddr += offset;
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if (sym->section == &bfd_abs_section)
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ms_type = mst_abs;
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else if (sym->section->flags & SEC_CODE)
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{
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if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
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ms_type = mst_text;
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else
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ms_type = mst_file_text;
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}
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else if (sym->section->flags & SEC_ALLOC)
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{
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if (sym->flags & (BSF_GLOBAL | BSF_WEAK))
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{
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if (sym->section->flags & SEC_LOAD)
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ms_type = mst_data;
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else
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ms_type = mst_bss;
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}
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else if (sym->flags & BSF_LOCAL)
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{
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/* Not a special stabs-in-elf symbol, do regular
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symbol processing. */
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if (sym->section->flags & SEC_LOAD)
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ms_type = mst_file_data;
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else
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ms_type = mst_file_bss;
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}
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else
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ms_type = mst_unknown;
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}
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else
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return; /* Skip this symbol. */
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prim_record_minimal_symbol_and_info
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(sym->name, symaddr, ms_type, sym->section->index,
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sym->section, objfile);
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}
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}
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/* Build the minimal symbol table from SYMBOL_TABLE of length
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NUMBER_OF_SYMBOLS for OBJFILE. Registers OSO filenames found. */
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static void
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macho_symtab_read (struct objfile *objfile,
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long number_of_symbols, asymbol **symbol_table)
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{
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long i;
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const asymbol *dir_so = NULL;
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const asymbol *file_so = NULL;
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asymbol **oso_file = NULL;
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unsigned int nbr_syms = 0;
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/* Current state while reading stabs. */
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enum
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{
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/* Not within an SO part. Only non-debugging symbols should be present,
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and will be added to the minimal symbols table. */
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S_NO_SO,
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/* First SO read. Introduce an SO section, and may be followed by a second
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SO. The SO section should contain onl debugging symbols. */
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S_FIRST_SO,
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/* Second non-null SO found, just after the first one. Means that the first
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is in fact a directory name. */
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S_SECOND_SO,
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/* Non-null OSO found. Debugging info are DWARF in this OSO file. */
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S_DWARF_FILE,
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S_STAB_FILE
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} state = S_NO_SO;
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for (i = 0; i < number_of_symbols; i++)
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{
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const asymbol *sym = symbol_table[i];
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bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym;
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switch (state)
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{
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case S_NO_SO:
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if (mach_o_sym->n_type == N_SO)
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{
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/* Start of object stab. */
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if (sym->name == NULL || sym->name[0] == 0)
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{
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/* Unexpected empty N_SO. */
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complaint (&symfile_complaints,
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_("Unexpected empty N_SO stab"));
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}
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else
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{
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file_so = sym;
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dir_so = NULL;
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state = S_FIRST_SO;
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}
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}
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else if (sym->flags & BSF_DEBUGGING)
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{
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if (mach_o_sym->n_type == N_OPT)
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{
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/* No complaint for OPT. */
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break;
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}
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/* Debugging symbols are not expected here. */
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complaint (&symfile_complaints,
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_("%s: Unexpected debug stab outside SO markers"),
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objfile->name);
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}
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else
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{
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/* Non-debugging symbols go to the minimal symbol table. */
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macho_symtab_add_minsym (objfile, sym);
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}
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break;
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case S_FIRST_SO:
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case S_SECOND_SO:
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if (mach_o_sym->n_type == N_SO)
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{
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if (sym->name == NULL || sym->name[0] == 0)
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{
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/* Unexpected empty N_SO. */
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complaint (&symfile_complaints, _("Empty SO section"));
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state = S_NO_SO;
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}
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else if (state == S_FIRST_SO)
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{
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/* Second SO stab for the file name. */
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dir_so = file_so;
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file_so = sym;
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state = S_SECOND_SO;
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}
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else
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complaint (&symfile_complaints, _("Three SO in a raw"));
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}
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else if (mach_o_sym->n_type == N_OSO)
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{
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if (sym->name == NULL || sym->name[0] == 0)
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{
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/* Empty OSO. Means that this file was compiled with
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stabs. */
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state = S_STAB_FILE;
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warning (_("stabs debugging not supported for %s"),
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file_so->name);
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}
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else
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{
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/* Non-empty OSO for a Dwarf file. */
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oso_file = symbol_table + i;
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nbr_syms = 0;
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state = S_DWARF_FILE;
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}
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}
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else
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complaint (&symfile_complaints,
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_("Unexpected stab after SO"));
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break;
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case S_STAB_FILE:
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case S_DWARF_FILE:
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if (mach_o_sym->n_type == N_SO)
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{
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if (sym->name == NULL || sym->name[0] == 0)
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{
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/* End of file. */
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if (state == S_DWARF_FILE)
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macho_register_oso (objfile, oso_file, symbol_table + i,
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nbr_syms);
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state = S_NO_SO;
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}
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else
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{
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complaint (&symfile_complaints, _("Missing nul SO"));
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file_so = sym;
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dir_so = NULL;
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state = S_FIRST_SO;
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}
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}
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else if (sym->flags & BSF_DEBUGGING)
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{
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if (state == S_STAB_FILE)
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{
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/* FIXME: to be implemented. */
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}
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else
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{
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switch (mach_o_sym->n_type)
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{
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case N_FUN:
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if (sym->name == NULL || sym->name[0] == 0)
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break;
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/* Fall through. */
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case N_STSYM:
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/* Interesting symbol. */
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nbr_syms++;
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break;
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case N_ENSYM:
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case N_BNSYM:
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case N_GSYM:
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break;
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default:
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complaint (&symfile_complaints,
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_("unhandled stab for dwarf OSO file"));
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break;
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}
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}
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}
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else
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complaint (&symfile_complaints,
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_("non-debugging symbol within SO"));
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break;
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}
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}
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if (state != S_NO_SO)
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complaint (&symfile_complaints, _("missing nul SO"));
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}
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/* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'),
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returns the length of the archive name.
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Returns -1 otherwise. */
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static int
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get_archive_prefix_len (const char *name)
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{
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char *lparen;
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int name_len = strlen (name);
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if (name_len == 0 || name[name_len - 1] != ')')
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return -1;
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lparen = strrchr (name, '(');
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if (lparen == NULL || lparen == name)
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return -1;
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return lparen - name;
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}
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/* Compare function to qsort OSOs, so that members of a library are
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gathered. */
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static int
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oso_el_compare_name (const void *vl, const void *vr)
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{
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const oso_el *l = (const oso_el *)vl;
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const oso_el *r = (const oso_el *)vr;
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return strcmp (l->name, r->name);
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}
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/* Hash table entry structure for the stabs symbols in the main object file.
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This is used to speed up lookup for symbols in the OSO. */
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struct macho_sym_hash_entry
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{
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struct bfd_hash_entry base;
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const asymbol *sym;
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};
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/* Routine to create an entry in the hash table. */
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static struct bfd_hash_entry *
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macho_sym_hash_newfunc (struct bfd_hash_entry *entry,
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struct bfd_hash_table *table,
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const char *string)
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{
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struct macho_sym_hash_entry *ret = (struct macho_sym_hash_entry *) entry;
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/* Allocate the structure if it has not already been allocated by a
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subclass. */
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if (ret == NULL)
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ret = (struct macho_sym_hash_entry *) bfd_hash_allocate (table,
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sizeof (* ret));
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if (ret == NULL)
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return NULL;
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/* Call the allocation method of the superclass. */
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ret = (struct macho_sym_hash_entry *)
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bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string);
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if (ret)
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{
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/* Initialize the local fields. */
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ret->sym = NULL;
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}
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return (struct bfd_hash_entry *) ret;
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}
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/* Get the value of SYM from the minimal symtab of MAIN_OBJFILE. This is used
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to get the value of global and common symbols. */
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static CORE_ADDR
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macho_resolve_oso_sym_with_minsym (struct objfile *main_objfile, asymbol *sym)
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{
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/* For common symbol and global symbols, use the min symtab. */
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struct minimal_symbol *msym;
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const char *name = sym->name;
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if (name[0] == bfd_get_symbol_leading_char (main_objfile->obfd))
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++name;
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msym = lookup_minimal_symbol (name, NULL, main_objfile);
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if (msym == NULL)
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{
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warning (_("can't find symbol '%s' in minsymtab"), name);
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return 0;
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}
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else
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return SYMBOL_VALUE_ADDRESS (msym);
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}
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/* Add oso file OSO/ABFD as a symbol file. */
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static void
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macho_add_oso_symfile (oso_el *oso, bfd *abfd,
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struct objfile *main_objfile, int symfile_flags)
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{
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int storage;
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int i;
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asymbol **symbol_table;
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asymbol **symp;
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struct bfd_hash_table table;
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int nbr_sections;
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/* Per section flag to mark which section have been rebased. */
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unsigned char *sections_rebased;
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if (mach_o_debug_level > 0)
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printf_unfiltered
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(_("Loading debugging symbols from oso: %s\n"), oso->name);
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if (!bfd_check_format (abfd, bfd_object))
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{
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warning (_("`%s': can't read symbols: %s."), oso->name,
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bfd_errmsg (bfd_get_error ()));
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bfd_close (abfd);
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return;
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}
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if (abfd->my_archive == NULL && oso->mtime != bfd_get_mtime (abfd))
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{
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warning (_("`%s': file time stamp mismatch."), oso->name);
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bfd_close (abfd);
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return;
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}
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if (!bfd_hash_table_init_n (&table, macho_sym_hash_newfunc,
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sizeof (struct macho_sym_hash_entry),
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oso->nbr_syms))
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{
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warning (_("`%s': can't create hash table"), oso->name);
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bfd_close (abfd);
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return;
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}
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bfd_set_cacheable (abfd, 1);
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/* Read symbols table. */
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storage = bfd_get_symtab_upper_bound (abfd);
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symbol_table = (asymbol **) xmalloc (storage);
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bfd_canonicalize_symtab (abfd, symbol_table);
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/* Init section flags. */
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nbr_sections = bfd_count_sections (abfd);
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sections_rebased = (unsigned char *) alloca (nbr_sections);
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for (i = 0; i < nbr_sections; i++)
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sections_rebased[i] = 0;
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|
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/* Put symbols for the OSO file in the hash table. */
|
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for (symp = oso->oso_sym; symp != oso->end_sym; symp++)
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{
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const asymbol *sym = *symp;
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bfd_mach_o_asymbol *mach_o_sym = (bfd_mach_o_asymbol *)sym;
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switch (mach_o_sym->n_type)
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{
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case N_ENSYM:
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case N_BNSYM:
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case N_GSYM:
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sym = NULL;
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break;
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case N_FUN:
|
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if (sym->name == NULL || sym->name[0] == 0)
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sym = NULL;
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break;
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case N_STSYM:
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break;
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default:
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sym = NULL;
|
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break;
|
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}
|
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if (sym != NULL)
|
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{
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struct macho_sym_hash_entry *ent;
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ent = (struct macho_sym_hash_entry *)
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bfd_hash_lookup (&table, sym->name, TRUE, FALSE);
|
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if (ent->sym != NULL)
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complaint (&symfile_complaints,
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_("Duplicated symbol %s in symbol table"), sym->name);
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else
|
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{
|
|
if (mach_o_debug_level > 4)
|
|
{
|
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struct gdbarch *arch = get_objfile_arch (main_objfile);
|
|
printf_unfiltered
|
|
(_("Adding symbol %s (addr: %s)\n"),
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sym->name, paddress (arch, sym->value));
|
|
}
|
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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;
|
|
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. */
|
|
&psym_functions
|
|
};
|
|
|
|
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);
|
|
}
|