/* Darwin support for GDB, the GNU debugger.
- Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
Contributed by AdaCore.
/* If non-zero displays debugging message. */
static int mach_o_debug_level = 0;
-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);
-}
-
/* 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.
int num_sections;
/* Each seaction of the object file is represented by a symbol and its
- offset. */
+ 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. */
+/* 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;
-/* Add a new OSO to the 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_add_oso (const asymbol *oso_sym, int nbr_sections,
- asymbol **symbols, bfd_vma *offsets)
+macho_register_oso (const asymbol *oso_sym, int nbr_sections,
+ asymbol **symbols, bfd_vma *offsets)
{
oso_el el;
{
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:
- if ((sym->name == NULL || sym->name[0] == 0)
- && oso_file != NULL)
+ /* An empty SO entry terminates a chunk for an OSO file. */
+ if ((sym->name == NULL || sym->name[0] == 0) && oso_file != NULL)
{
- macho_add_oso (oso_file, nbr_sections,
- first_symbol, first_offset);
+ macho_register_oso (oso_file, nbr_sections,
+ first_symbol, first_offset);
first_symbol = NULL;
first_offset = NULL;
oso_file = NULL;
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;
}
case N_GSYM:
gdb_assert (oso_file != NULL);
if (first_symbol[sym->section->index] == NULL)
- first_symbol[sym->section->index] = sym;
+ {
+ /* 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 *));
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;
}
}
}
+ /* Just in case there is no trailing SO entry. */
if (oso_file != NULL)
- macho_add_oso (oso_file, nbr_sections, first_symbol, first_offset);
+ macho_register_oso (oso_file, nbr_sections, first_symbol, first_offset);
}
/* If NAME describes an archive member (ie: ARCHIVE '(' MEMBER ')'),
/* Add an oso file as a symbol file. */
static void
-macho_add_oso_symfile (oso_el *oso, bfd *abfd, struct objfile *main_objfile)
+macho_add_oso_symfile (oso_el *oso, bfd *abfd,
+ struct objfile *main_objfile, int symfile_flags)
{
- struct section_addr_info *addrs;
- int len;
+ 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_set_cacheable (abfd, 1);
-
- /* Compute addr length. */
- len = 0;
- for (i = 0; i < oso->num_sections; i++)
- if (oso->symbols[i] != NULL)
- len++;
-
- addrs = alloc_section_addr_info (len);
+
+ /* Relocate sections. */
leading_char = bfd_get_symbol_leading_char (main_objfile->obfd);
- len = 0;
for (i = 0; i < oso->num_sections; i++)
- if (oso->symbols[i] != NULL)
- {
- if (oso->offsets[i])
- addrs->other[len].addr = 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"),
- oso->symbols[i]->name);
- addrs->other[len].addr = 0;
- }
- else
- addrs->other[len].addr = SYMBOL_VALUE_ADDRESS (msym);
- }
- addrs->other[len].name = (char *)oso->symbols[i]->section->name;
- len++;
- }
-
- if (mach_o_debug_level > 1)
{
- int j;
- for (j = 0; j < addrs->num_sections; j++)
+ 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 (addrs->other[j].addr),
- addrs->other[j].name);
+ core_addr_to_string (vma), sectname);
}
- symbol_file_add_from_bfd (abfd, 0, addrs, 0);
+ /* 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_oso_symfile (struct objfile *main_objfile)
+macho_symfile_read_all_oso (struct objfile *main_objfile, int symfile_flags)
{
int ix;
VEC (oso_el) *vec;
&& !memcmp (member_name, oso2->name + pfx_len + 1,
member_len))
{
- macho_add_oso_symfile (oso2, member_bfd, main_objfile);
+ macho_add_oso_symfile (oso2, member_bfd,
+ main_objfile, symfile_flags);
oso2->name = NULL;
break;
}
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);
+ macho_add_oso_symfile (oso, abfd, main_objfile, symfile_flags);
ix++;
}
size_t base_len = strlen (base_name);
char *dsym_filename = alloca (name_len + dsym_len + base_len + 1);
bfd *dsym_bfd;
- asection *sect;
- bfd_byte main_uuid[16];
- bfd_byte dsym_uuid[16];
+ 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);
if (access (dsym_filename, R_OK) != 0)
return NULL;
- sect = bfd_get_section_by_name (objfile->obfd, "LC_UUID");
- if (sect == 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;
}
- if (!bfd_get_section_contents (objfile->obfd, sect, main_uuid,
- 0, sizeof (main_uuid)))
- {
- warning (_("can't read UUID in %s"), objfile->name);
- return NULL;
- }
-
dsym_filename = xstrdup (dsym_filename);
dsym_bfd = bfd_openr (dsym_filename, gnutarget);
if (dsym_bfd == NULL)
return NULL;
}
- sect = bfd_get_section_by_name (dsym_bfd, "LC_UUID");
- if (sect == 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 (!bfd_get_section_contents (dsym_bfd, sect, dsym_uuid,
- 0, sizeof (dsym_uuid)))
- {
- warning (_("can't read UUID in %s"), dsym_filename);
- bfd_close (dsym_bfd);
- xfree (dsym_filename);
- return NULL;
- }
- if (memcmp (dsym_uuid, main_uuid, sizeof (main_uuid)))
+ 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);
return NULL;
}
return dsym_bfd;
-
}
static void
-macho_symfile_read (struct objfile *objfile, int mainline)
+macho_symfile_read (struct objfile *objfile, int symfile_flags)
{
bfd *abfd = objfile->obfd;
struct cleanup *back_to;
{
int ix;
oso_el *oso;
+ struct bfd_section *asect, *dsect;
if (mach_o_debug_level > 0)
printf_unfiltered (_("dsym file found\n"));
VEC_free (oso_el, oso_vector);
oso_vector = NULL;
- /* Now recurse: read dwarf from dsym. */
- symbol_file_add_from_bfd (dsym_bfd, 0, NULL, 0);
+ /* 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;
+ return;
}
}
if (dwarf2_has_info (objfile))
{
/* DWARF 2 sections */
- dwarf2_build_psymtabs (objfile, mainline);
+ dwarf2_build_psymtabs (objfile);
}
/* Do not try to read .eh_frame/.debug_frame as they are not relocated
/* Then the oso. */
if (oso_vector != NULL)
- macho_oso_symfile (objfile);
+ 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_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 */
};
projects / deliverable / binutils-gdb.git / blobdiff