/* DWARF 2 support.
- Copyright (C) 1994-2017 Free Software Foundation, Inc.
+ Copyright (C) 1994-2019 Free Software Foundation, Inc.
Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions
(gavin@cygnus.com).
#include "libbfd.h"
#include "elf-bfd.h"
#include "dwarf2.h"
+#include "hashtab.h"
/* The data in the .debug_line statement prologue looks like this. */
/* Section VMAs at the time the stash was built. */
bfd_vma *sec_vma;
+ /* Number of sections in the SEC_VMA table. */
+ unsigned int sec_vma_count;
/* Number of sections whose VMA we must adjust. */
int adjusted_section_count;
{ NULL, NULL },
};
-/* NB/ Numbers in this enum must match up with indicies
+/* NB/ Numbers in this enum must match up with indices
into the dwarf_debug_sections[] array above. */
enum dwarf_debug_section_enum
{
asection *msec;
const char *section_name = sec->uncompressed_name;
bfd_byte *contents = *section_buffer;
+ bfd_size_type amt;
/* The section may have already been read. */
if (contents == NULL)
}
if (! msec)
{
- _bfd_error_handler (_("Dwarf Error: Can't find %s section."),
+ _bfd_error_handler (_("DWARF error: can't find %s section."),
sec->uncompressed_name);
bfd_set_error (bfd_error_bad_value);
return FALSE;
*section_size = msec->rawsize ? msec->rawsize : msec->size;
/* Paranoia - alloc one extra so that we can make sure a string
section is NUL terminated. */
- contents = (bfd_byte *) bfd_malloc (*section_size + 1);
+ amt = *section_size + 1;
+ if (amt == 0)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return FALSE;
+ }
+ contents = (bfd_byte *) bfd_malloc (amt);
if (contents == NULL)
return FALSE;
if (syms
if (offset != 0 && offset >= *section_size)
{
/* xgettext: c-format */
- _bfd_error_handler (_("Dwarf Error: Offset (%llu)"
- " greater than or equal to %s size (%Lu)."),
- (long long) offset, section_name, *section_size);
+ _bfd_error_handler (_("DWARF error: offset (%" PRIu64 ")"
+ " greater than or equal to %s size (%" PRIu64 ")"),
+ (uint64_t) offset, section_name,
+ (uint64_t) *section_size);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
static bfd_byte *
-read_n_bytes (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_byte *buf,
- bfd_byte *end,
- unsigned int size ATTRIBUTE_UNUSED)
+read_n_bytes (bfd_byte * buf,
+ bfd_byte * end,
+ struct dwarf_block * block)
{
- if (buf + size > end)
- return NULL;
- return buf;
+ unsigned int size = block->size;
+ bfd_byte * block_end = buf + size;
+
+ if (block_end > end || block_end < buf)
+ {
+ block->data = NULL;
+ block->size = 0;
+ return end;
+ }
+ else
+ {
+ block->data = buf;
+ return block_end;
+ }
}
/* Scans a NUL terminated string starting at BUF, returning a pointer to it.
if (stash->alt_bfd_ptr == NULL)
{
- bfd * debug_bfd;
- char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR);
+ bfd *debug_bfd;
+ char *debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR);
if (debug_filename == NULL)
return NULL;
- if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
- || ! bfd_check_format (debug_bfd, bfd_object))
- {
- if (debug_bfd)
- bfd_close (debug_bfd);
+ debug_bfd = bfd_openr (debug_filename, NULL);
+ free (debug_filename);
+ if (debug_bfd == NULL)
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ return NULL;
- /* FIXME: Should we report our failure to follow the debuglink ? */
- free (debug_filename);
+ if (!bfd_check_format (debug_bfd, bfd_object))
+ {
+ bfd_close (debug_bfd);
return NULL;
}
stash->alt_bfd_ptr = debug_bfd;
if (stash->alt_bfd_ptr == NULL)
{
- bfd * debug_bfd;
- char * debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR);
+ bfd *debug_bfd;
+ char *debug_filename = bfd_follow_gnu_debugaltlink (unit->abfd, DEBUGDIR);
if (debug_filename == NULL)
return FALSE;
- if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
- || ! bfd_check_format (debug_bfd, bfd_object))
- {
- if (debug_bfd)
- bfd_close (debug_bfd);
+ debug_bfd = bfd_openr (debug_filename, NULL);
+ free (debug_filename);
+ if (debug_bfd == NULL)
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ return NULL;
- /* FIXME: Should we report our failure to follow the debuglink ? */
- free (debug_filename);
+ if (!bfd_check_format (debug_bfd, bfd_object))
+ {
+ bfd_close (debug_bfd);
return NULL;
}
stash->alt_bfd_ptr = debug_bfd;
if (info_ptr >= info_ptr_end && form != DW_FORM_flag_present)
{
- _bfd_error_handler (_("Dwarf Error: Info pointer extends beyond end of attributes"));
+ _bfd_error_handler (_("DWARF error: info pointer extends beyond end of attributes"));
bfd_set_error (bfd_error_bad_value);
return info_ptr;
}
return NULL;
blk->size = read_2_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 2;
- blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
- info_ptr += blk->size;
+ info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk);
attr->u.blk = blk;
break;
case DW_FORM_block4:
return NULL;
blk->size = read_4_bytes (abfd, info_ptr, info_ptr_end);
info_ptr += 4;
- blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
- info_ptr += blk->size;
+ info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk);
attr->u.blk = blk;
break;
case DW_FORM_data2:
blk->size = _bfd_safe_read_leb128 (abfd, info_ptr, &bytes_read,
FALSE, info_ptr_end);
info_ptr += bytes_read;
- blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
- info_ptr += blk->size;
+ info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk);
attr->u.blk = blk;
break;
case DW_FORM_block1:
return NULL;
blk->size = read_1_byte (abfd, info_ptr, info_ptr_end);
info_ptr += 1;
- blk->data = read_n_bytes (abfd, info_ptr, info_ptr_end, blk->size);
- info_ptr += blk->size;
+ info_ptr = read_n_bytes (info_ptr, info_ptr_end, blk);
attr->u.blk = blk;
break;
case DW_FORM_data1:
attr->u.sval = implicit_const;
break;
default:
- _bfd_error_handler (_("Dwarf Error: Invalid or unhandled FORM value: %#x."),
+ _bfd_error_handler (_("DWARF error: invalid or unhandled FORM value: %#x"),
form);
bfd_set_error (bfd_error_bad_value);
return NULL;
{
char *filename;
- if (file - 1 >= table->num_files)
+ if (table == NULL || file - 1 >= table->num_files)
{
/* FILE == 0 means unknown. */
if (file)
_bfd_error_handler
- (_("Dwarf Error: mangled line number section (bad file number)."));
+ (_("DWARF error: mangled line number section (bad file number)"));
return strdup ("<unknown>");
}
buf += bytes_read;
if (format_count == 0 && data_count != 0)
{
- _bfd_error_handler (_("Dwarf Error: Zero format count."));
+ _bfd_error_handler (_("DWARF error: zero format count"));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if we know that we are going to run out of buffer. */
if (data_count > (bfd_vma) (buf_end - buf))
{
- _bfd_error_handler (_("Dwarf Error: data count (%Lx) larger than buffer size."),
- data_count);
+ _bfd_error_handler
+ (_("DWARF error: data count (%" PRIx64 ") larger than buffer size"),
+ (uint64_t) data_count);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
break;
default:
_bfd_error_handler
- (_("Dwarf Error: Unknown format content type %Lu."),
- content_type);
+ (_("DWARF error: unknown format content type %" PRIu64),
+ (uint64_t) content_type);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (stash->dwarf_line_size < 16)
{
_bfd_error_handler
- (_("Dwarf Error: Line info section is too small (%Ld)"),
- stash->dwarf_line_size);
+ (_("DWARF error: line info section is too small (%" PRId64 ")"),
+ (int64_t) stash->dwarf_line_size);
bfd_set_error (bfd_error_bad_value);
return NULL;
}
{
_bfd_error_handler
/* xgettext: c-format */
- (_("Dwarf Error: Line info data is bigger (%#Lx)"
+ (_("DWARF error: line info data is bigger (%#" PRIx64 ")"
" than the space remaining in the section (%#lx)"),
- lh.total_length, (unsigned long) (line_end - line_ptr));
+ (uint64_t) lh.total_length, (unsigned long) (line_end - line_ptr));
bfd_set_error (bfd_error_bad_value);
return NULL;
}
if (lh.version < 2 || lh.version > 5)
{
_bfd_error_handler
- (_("Dwarf Error: Unhandled .debug_line version %d."), lh.version);
+ (_("DWARF error: unhandled .debug_line version %d"), lh.version);
bfd_set_error (bfd_error_bad_value);
return NULL;
}
>= line_end)
{
_bfd_error_handler
- (_("Dwarf Error: Ran out of room reading prologue"));
+ (_("DWARF error: ran out of room reading prologue"));
bfd_set_error (bfd_error_bad_value);
return NULL;
}
if (segment_selector_size != 0)
{
_bfd_error_handler
- (_("Dwarf Error: Line info unsupported segment selector size %u."),
+ (_("DWARF error: line info unsupported segment selector size %u"),
segment_selector_size);
bfd_set_error (bfd_error_bad_value);
return NULL;
if (lh.maximum_ops_per_insn == 0)
{
_bfd_error_handler
- (_("Dwarf Error: Invalid maximum operations per instruction."));
+ (_("DWARF error: invalid maximum operations per instruction"));
bfd_set_error (bfd_error_bad_value);
return NULL;
}
if (line_ptr + (lh.opcode_base - 1) >= line_end)
{
- _bfd_error_handler (_("Dwarf Error: Ran out of room reading opcodes"));
+ _bfd_error_handler (_("DWARF error: ran out of room reading opcodes"));
bfd_set_error (bfd_error_bad_value);
return NULL;
}
break;
default:
_bfd_error_handler
- (_("Dwarf Error: mangled line number section."));
+ (_("DWARF error: mangled line number section"));
bfd_set_error (bfd_error_bad_value);
line_fail:
if (filename != NULL)
bfd_vma best_fit_len = 0;
struct arange *arange;
const char *name = bfd_asymbol_name (sym);
- asection *sec = bfd_get_section (sym);
+ asection *sec = bfd_asymbol_section (sym);
for (each_func = unit->function_table;
each_func;
unsigned int *linenumber_ptr)
{
const char *name = bfd_asymbol_name (sym);
- asection *sec = bfd_get_section (sym);
+ asection *sec = bfd_asymbol_section (sym);
struct varinfo* each;
for (each = unit->variable_table; each; each = each->prev_var)
return FALSE;
}
+static struct comp_unit *stash_comp_unit (struct dwarf2_debug *);
+static bfd_boolean comp_unit_maybe_decode_line_info (struct comp_unit *,
+ struct dwarf2_debug *);
+
static bfd_boolean
-find_abstract_instance_name (struct comp_unit *unit,
- bfd_byte *orig_info_ptr,
- struct attribute *attr_ptr,
- const char **pname,
- bfd_boolean *is_linkage)
+find_abstract_instance (struct comp_unit * unit,
+ bfd_byte * orig_info_ptr,
+ struct attribute * attr_ptr,
+ const char ** pname,
+ bfd_boolean * is_linkage,
+ char ** filename_ptr,
+ int * linenumber_ptr)
{
bfd *abfd = unit->abfd;
bfd_byte *info_ptr;
info_ptr = unit->stash->info_ptr_memory;
info_ptr_end = unit->stash->info_ptr_end;
total = info_ptr_end - info_ptr;
- if (!die_ref || die_ref >= total)
+ if (!die_ref)
+ return TRUE;
+ else if (die_ref >= total)
{
_bfd_error_handler
- (_("Dwarf Error: Invalid abstract instance DIE ref."));
+ (_("DWARF error: invalid abstract instance DIE ref"));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr)
break;
- if (u)
+ while (u == NULL)
{
- unit = u;
- info_ptr_end = unit->end_ptr;
+ u = stash_comp_unit (unit->stash);
+ if (u == NULL)
+ break;
+ if (info_ptr >= u->info_ptr_unit && info_ptr < u->end_ptr)
+ break;
+ u = NULL;
+ }
+
+ if (u == NULL)
+ {
+ _bfd_error_handler
+ (_("DWARF error: unable to locate abstract instance DIE ref %"
+ PRIu64), (uint64_t) die_ref);
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
}
- /* else FIXME: What do we do now ? */
+ unit = u;
+ info_ptr_end = unit->end_ptr;
}
}
else if (attr_ptr->form == DW_FORM_GNU_ref_alt)
if (info_ptr == NULL)
{
_bfd_error_handler
- (_("Dwarf Error: Unable to read alt ref %llu."),
- (long long) die_ref);
+ (_("DWARF error: unable to read alt ref %" PRIu64),
+ (uint64_t) die_ref);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (!die_ref || die_ref >= total)
{
_bfd_error_handler
- (_("Dwarf Error: Invalid abstract instance DIE ref."));
+ (_("DWARF error: invalid abstract instance DIE ref"));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (! abbrev)
{
_bfd_error_handler
- (_("Dwarf Error: Could not find abbrev number %u."), abbrev_number);
+ (_("DWARF error: could not find abbrev number %u"), abbrev_number);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
if (info_ptr == orig_info_ptr)
{
_bfd_error_handler
- (_("Dwarf Error: Abstract instance recursion detected."));
+ (_("DWARF error: abstract instance recursion detected"));
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
}
break;
case DW_AT_specification:
- if (!find_abstract_instance_name (unit, info_ptr, &attr,
- pname, is_linkage))
+ if (!find_abstract_instance (unit, info_ptr, &attr,
+ &name, is_linkage,
+ filename_ptr, linenumber_ptr))
return FALSE;
break;
case DW_AT_linkage_name:
*is_linkage = TRUE;
}
break;
+ case DW_AT_decl_file:
+ if (!comp_unit_maybe_decode_line_info (unit, unit->stash))
+ return FALSE;
+ *filename_ptr = concat_filename (unit->line_table,
+ attr.u.val);
+ break;
+ case DW_AT_decl_line:
+ *linenumber_ptr = attr.u.val;
+ break;
default:
break;
}
{
bfd *abfd = unit->abfd;
bfd_byte *info_ptr = unit->first_child_die_ptr;
- bfd_byte *info_ptr_end = unit->stash->info_ptr_end;
+ bfd_byte *info_ptr_end = unit->end_ptr;
int nesting_level = 0;
struct nest_funcinfo {
struct funcinfo *func;
if (abbrev_number != previous_failed_abbrev)
{
_bfd_error_handler
- (_("Dwarf Error: Could not find abbrev number %u."),
+ (_("DWARF error: could not find abbrev number %u"),
abbrev_number);
previous_failed_abbrev = abbrev_number;
}
case DW_AT_abstract_origin:
case DW_AT_specification:
- if (!find_abstract_instance_name (unit, info_ptr, &attr,
- &func->name,
- &func->is_linkage))
+ if (!find_abstract_instance (unit, info_ptr, &attr,
+ &func->name,
+ &func->is_linkage,
+ &func->file,
+ &func->line))
goto fail;
break;
return FALSE;
}
-/* Parse a DWARF2 compilation unit starting at INFO_PTR. This
+/* Parse a DWARF2 compilation unit starting at INFO_PTR. UNIT_LENGTH
includes the compilation unit header that proceeds the DIE's, but
does not include the length field that precedes each compilation
unit header. END_PTR points one past the end of this comp unit.
if (version)
{
_bfd_error_handler
- (_("Dwarf Error: found dwarf version '%u', this reader"
- " only handles version 2, 3, 4 and 5 information."), version);
+ (_("DWARF error: found dwarf version '%u', this reader"
+ " only handles version 2, 3, 4 and 5 information"), version);
bfd_set_error (bfd_error_bad_value);
}
return NULL;
{
_bfd_error_handler
/* xgettext: c-format */
- (_("Dwarf Error: found address size '%u', this reader"
- " can not handle sizes greater than '%u'."),
+ (_("DWARF error: found address size '%u', this reader"
+ " can not handle sizes greater than '%u'"),
addr_size,
(unsigned int) sizeof (bfd_vma));
bfd_set_error (bfd_error_bad_value);
if (addr_size != 2 && addr_size != 4 && addr_size != 8)
{
_bfd_error_handler
- ("Dwarf Error: found address size '%u', this reader"
- " can only handle address sizes '2', '4' and '8'.", addr_size);
+ ("DWARF error: found address size '%u', this reader"
+ " can only handle address sizes '2', '4' and '8'", addr_size);
bfd_set_error (bfd_error_bad_value);
return NULL;
}
abbrev = lookup_abbrev (abbrev_number, abbrevs);
if (! abbrev)
{
- _bfd_error_handler (_("Dwarf Error: Could not find abbrev number %u."),
+ _bfd_error_handler (_("DWARF error: could not find abbrev number %u"),
abbrev_number);
bfd_set_error (bfd_error_bad_value);
return NULL;
if (! is_str_attr (attr.form))
{
_bfd_error_handler
- (_("Dwarf Error: DW_AT_comp_dir attribute encountered with a non-string form."));
+ (_("DWARF error: DW_AT_comp_dir attribute encountered with a non-string form"));
comp_dir = NULL;
}
{
bfd_boolean func_p;
- if (unit->error)
+ if (!comp_unit_maybe_decode_line_info (unit, stash))
return FALSE;
- if (! unit->line_table)
- {
- if (! unit->stmtlist)
- {
- unit->error = 1;
- return FALSE;
- }
-
- unit->line_table = decode_line_info (unit, stash);
-
- if (! unit->line_table)
- {
- unit->error = 1;
- return FALSE;
- }
-
- if (unit->first_child_die_ptr < unit->end_ptr
- && ! scan_unit_for_symbols (unit))
- {
- unit->error = 1;
- return FALSE;
- }
- }
-
*function_ptr = NULL;
func_p = lookup_address_in_function_table (unit, addr, function_ptr);
if (func_p && (*function_ptr)->tag == DW_TAG_inlined_subroutine)
struct info_list_node *node;
struct arange *arange;
const char *name = bfd_asymbol_name (sym);
- asection *sec = bfd_get_section (sym);
+ asection *sec = bfd_asymbol_section (sym);
for (node = lookup_info_hash_table (hash_table, name);
node;
unsigned int *linenumber_ptr)
{
const char *name = bfd_asymbol_name (sym);
- asection *sec = bfd_get_section (sym);
+ asection *sec = bfd_asymbol_section (sym);
struct varinfo* each;
struct info_list_node *node;
stash->sec_vma = bfd_malloc (sizeof (*stash->sec_vma) * abfd->section_count);
if (stash->sec_vma == NULL)
return FALSE;
- for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next)
+ stash->sec_vma_count = abfd->section_count;
+ for (i = 0, s = abfd->sections;
+ s != NULL && i < abfd->section_count;
+ i++, s = s->next)
{
if (s->output_section != NULL)
stash->sec_vma[i] = s->output_section->vma + s->output_offset;
asection *s;
unsigned int i;
- for (i = 0, s = abfd->sections; i < abfd->section_count; i++, s = s->next)
+ /* PR 24334: If the number of sections in ABFD has changed between
+ when the stash was created and now, then we cannot trust the
+ stashed vma information. */
+ if (abfd->section_count != stash->sec_vma_count)
+ return FALSE;
+
+ for (i = 0, s = abfd->sections;
+ s != NULL && i < abfd->section_count;
+ i++, s = s->next)
{
bfd_vma vma;
fail more quickly. */
return FALSE;
+ debug_bfd = bfd_openr (debug_filename, NULL);
+ free (debug_filename);
+ if (debug_bfd == NULL)
+ /* FIXME: Should we report our failure to follow the debuglink ? */
+ return FALSE;
+
/* Set BFD_DECOMPRESS to decompress debug sections. */
- if ((debug_bfd = bfd_openr (debug_filename, NULL)) == NULL
- || !(debug_bfd->flags |= BFD_DECOMPRESS,
- bfd_check_format (debug_bfd, bfd_object))
+ debug_bfd->flags |= BFD_DECOMPRESS;
+ if (!bfd_check_format (debug_bfd, bfd_object)
|| (msec = find_debug_info (debug_bfd,
debug_sections, NULL)) == NULL
|| !bfd_generic_link_read_symbols (debug_bfd))
{
- if (debug_bfd)
- bfd_close (debug_bfd);
- /* FIXME: Should we report our failure to follow the debuglink ? */
- free (debug_filename);
+ bfd_close (debug_bfd);
return FALSE;
}
return TRUE;
}
+/* Parse the next DWARF2 compilation unit at STASH->INFO_PTR. */
+
+static struct comp_unit *
+stash_comp_unit (struct dwarf2_debug *stash)
+{
+ bfd_size_type length;
+ unsigned int offset_size;
+ bfd_byte *info_ptr_unit = stash->info_ptr;
+
+ if (stash->info_ptr >= stash->info_ptr_end)
+ return NULL;
+
+ length = read_4_bytes (stash->bfd_ptr, stash->info_ptr,
+ stash->info_ptr_end);
+ /* A 0xffffff length is the DWARF3 way of indicating
+ we use 64-bit offsets, instead of 32-bit offsets. */
+ if (length == 0xffffffff)
+ {
+ offset_size = 8;
+ length = read_8_bytes (stash->bfd_ptr, stash->info_ptr + 4,
+ stash->info_ptr_end);
+ stash->info_ptr += 12;
+ }
+ /* A zero length is the IRIX way of indicating 64-bit offsets,
+ mostly because the 64-bit length will generally fit in 32
+ bits, and the endianness helps. */
+ else if (length == 0)
+ {
+ offset_size = 8;
+ length = read_4_bytes (stash->bfd_ptr, stash->info_ptr + 4,
+ stash->info_ptr_end);
+ stash->info_ptr += 8;
+ }
+ /* In the absence of the hints above, we assume 32-bit DWARF2
+ offsets even for targets with 64-bit addresses, because:
+ a) most of the time these targets will not have generated
+ more than 2Gb of debug info and so will not need 64-bit
+ offsets,
+ and
+ b) if they do use 64-bit offsets but they are not using
+ the size hints that are tested for above then they are
+ not conforming to the DWARF3 standard anyway. */
+ else
+ {
+ offset_size = 4;
+ stash->info_ptr += 4;
+ }
+
+ if (length != 0
+ && stash->info_ptr + length <= stash->info_ptr_end
+ && stash->info_ptr + length > stash->info_ptr)
+ {
+ struct comp_unit *each = parse_comp_unit (stash, length, info_ptr_unit,
+ offset_size);
+ if (each)
+ {
+ if (stash->all_comp_units)
+ stash->all_comp_units->prev_unit = each;
+ else
+ stash->last_comp_unit = each;
+
+ each->next_unit = stash->all_comp_units;
+ stash->all_comp_units = each;
+
+ stash->info_ptr += length;
+
+ if ((bfd_size_type) (stash->info_ptr - stash->sec_info_ptr)
+ == stash->sec->size)
+ {
+ stash->sec = find_debug_info (stash->bfd_ptr,
+ stash->debug_sections,
+ stash->sec);
+ stash->sec_info_ptr = stash->info_ptr;
+ }
+ return each;
+ }
+ }
+
+ /* Don't trust any of the DWARF info after a corrupted length or
+ parse error. */
+ stash->info_ptr = stash->info_ptr_end;
+ return NULL;
+}
+
+/* Hash function for an asymbol. */
+
+static hashval_t
+hash_asymbol (const void *sym)
+{
+ const asymbol *asym = sym;
+ return htab_hash_string (asym->name);
+}
+
+/* Equality function for asymbols. */
+
+static int
+eq_asymbol (const void *a, const void *b)
+{
+ const asymbol *sa = a;
+ const asymbol *sb = b;
+ return strcmp (sa->name, sb->name) == 0;
+}
+
/* Scan the debug information in PINFO looking for a DW_TAG_subprogram
abbrev with a DW_AT_low_pc attached to it. Then lookup that same
symbol in SYMBOLS and return the difference between the low_pc and
{
struct dwarf2_debug *stash;
struct comp_unit * unit;
+ htab_t sym_hash;
+ bfd_signed_vma result = 0;
+ asymbol ** psym;
stash = (struct dwarf2_debug *) *pinfo;
- if (stash == NULL)
+ if (stash == NULL || symbols == NULL)
return 0;
- for (unit = stash->all_comp_units; unit; unit = unit->next_unit)
+ sym_hash = htab_create_alloc (10, hash_asymbol, eq_asymbol,
+ NULL, xcalloc, free);
+ for (psym = symbols; * psym != NULL; psym++)
{
- struct funcinfo * func;
+ asymbol * sym = * psym;
- if (unit->function_table == NULL)
+ if (sym->flags & BSF_FUNCTION && sym->section != NULL)
{
- if (unit->line_table == NULL)
- unit->line_table = decode_line_info (unit, stash);
- if (unit->line_table != NULL)
- scan_unit_for_symbols (unit);
+ void **slot = htab_find_slot (sym_hash, sym, INSERT);
+ *slot = sym;
}
+ }
+
+ for (unit = stash->all_comp_units; unit; unit = unit->next_unit)
+ {
+ struct funcinfo * func;
+
+ comp_unit_maybe_decode_line_info (unit, stash);
for (func = unit->function_table; func != NULL; func = func->prev_func)
if (func->name && func->arange.low)
{
- asymbol ** psym;
+ asymbol search, *sym;
/* FIXME: Do we need to scan the aranges looking for the lowest pc value ? */
- for (psym = symbols; * psym != NULL; psym++)
+ search.name = func->name;
+ sym = htab_find (sym_hash, &search);
+ if (sym != NULL)
{
- asymbol * sym = * psym;
-
- if (sym->flags & BSF_FUNCTION
- && sym->section != NULL
- && strcmp (sym->name, func->name) == 0)
- return ((bfd_signed_vma) func->arange.low) -
- ((bfd_signed_vma) (sym->value + sym->section->vma));
+ result = ((bfd_signed_vma) func->arange.low) -
+ ((bfd_signed_vma) (sym->value + sym->section->vma));
+ goto done;
}
}
}
- return 0;
+ done:
+ htab_delete (sym_hash);
+ return result;
}
/* Find the source code location of SYMBOL. If SYMBOL is NULL
NULL the FUNCTIONNAME_PTR is also filled in.
SYMBOLS contains the symbol table for ABFD.
DEBUG_SECTIONS contains the name of the dwarf debug sections.
- ADDR_SIZE is the number of bytes in the initial .debug_info length
field and in the abbreviation offset, or zero to indicate that the
default value should be used. */
unsigned int *linenumber_ptr,
unsigned int *discriminator_ptr,
const struct dwarf_debug_section *debug_sections,
- unsigned int addr_size,
void **pinfo)
{
/* Read each compilation unit from the section .debug_info, and check
if (do_line)
{
BFD_ASSERT (section == NULL && offset == 0 && functionname_ptr == NULL);
- section = bfd_get_section (symbol);
+ section = bfd_asymbol_section (symbol);
addr = symbol->value;
}
else
}
}
- /* The DWARF2 spec says that the initial length field, and the
- offset of the abbreviation table, should both be 4-byte values.
- However, some compilers do things differently. */
- if (addr_size == 0)
- addr_size = 4;
- BFD_ASSERT (addr_size == 4 || addr_size == 8);
-
/* Read each remaining comp. units checking each as they are read. */
- while (stash->info_ptr < stash->info_ptr_end)
+ while ((each = stash_comp_unit (stash)) != NULL)
{
- bfd_vma length;
- unsigned int offset_size = addr_size;
- bfd_byte *info_ptr_unit = stash->info_ptr;
-
- length = read_4_bytes (stash->bfd_ptr, stash->info_ptr, stash->info_ptr_end);
- /* A 0xffffff length is the DWARF3 way of indicating
- we use 64-bit offsets, instead of 32-bit offsets. */
- if (length == 0xffffffff)
- {
- offset_size = 8;
- length = read_8_bytes (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end);
- stash->info_ptr += 12;
- }
- /* A zero length is the IRIX way of indicating 64-bit offsets,
- mostly because the 64-bit length will generally fit in 32
- bits, and the endianness helps. */
- else if (length == 0)
- {
- offset_size = 8;
- length = read_4_bytes (stash->bfd_ptr, stash->info_ptr + 4, stash->info_ptr_end);
- stash->info_ptr += 8;
- }
- /* In the absence of the hints above, we assume 32-bit DWARF2
- offsets even for targets with 64-bit addresses, because:
- a) most of the time these targets will not have generated
- more than 2Gb of debug info and so will not need 64-bit
- offsets,
- and
- b) if they do use 64-bit offsets but they are not using
- the size hints that are tested for above then they are
- not conforming to the DWARF3 standard anyway. */
- else if (addr_size == 8)
- {
- offset_size = 4;
- stash->info_ptr += 4;
- }
+ /* DW_AT_low_pc and DW_AT_high_pc are optional for
+ compilation units. If we don't have them (i.e.,
+ unit->high == 0), we need to consult the line info table
+ to see if a compilation unit contains the given
+ address. */
+ if (do_line)
+ found = (((symbol->flags & BSF_FUNCTION) == 0
+ || each->arange.high == 0
+ || comp_unit_contains_address (each, addr))
+ && comp_unit_find_line (each, symbol, addr,
+ filename_ptr,
+ linenumber_ptr,
+ stash));
else
- stash->info_ptr += 4;
-
- if (length > 0)
- {
- bfd_byte * new_ptr;
-
- /* PR 21151 */
- if (stash->info_ptr + length > stash->info_ptr_end)
- return FALSE;
-
- each = parse_comp_unit (stash, length, info_ptr_unit,
- offset_size);
- if (!each)
- /* The dwarf information is damaged, don't trust it any
- more. */
- break;
-
- new_ptr = stash->info_ptr + length;
- /* PR 17512: file: 1500698c. */
- if (new_ptr < stash->info_ptr)
- {
- /* A corrupt length value - do not trust the info any more. */
- found = FALSE;
- break;
- }
- else
- stash->info_ptr = new_ptr;
-
- if (stash->all_comp_units)
- stash->all_comp_units->prev_unit = each;
- else
- stash->last_comp_unit = each;
-
- each->next_unit = stash->all_comp_units;
- stash->all_comp_units = each;
-
- /* DW_AT_low_pc and DW_AT_high_pc are optional for
- compilation units. If we don't have them (i.e.,
- unit->high == 0), we need to consult the line info table
- to see if a compilation unit contains the given
- address. */
- if (do_line)
- found = (((symbol->flags & BSF_FUNCTION) == 0
- || each->arange.high == 0
- || comp_unit_contains_address (each, addr))
- && comp_unit_find_line (each, symbol, addr,
- filename_ptr,
- linenumber_ptr,
- stash));
- else
- found = ((each->arange.high == 0
- || comp_unit_contains_address (each, addr))
- && comp_unit_find_nearest_line (each, addr,
- filename_ptr,
- &function,
- linenumber_ptr,
- discriminator_ptr,
- stash) != 0);
-
- if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr)
- == stash->sec->size)
- {
- stash->sec = find_debug_info (stash->bfd_ptr, debug_sections,
- stash->sec);
- stash->sec_info_ptr = stash->info_ptr;
- }
-
- if (found)
- goto done;
- }
+ found = ((each->arange.high == 0
+ || comp_unit_contains_address (each, addr))
+ && comp_unit_find_nearest_line (each, addr,
+ filename_ptr,
+ &function,
+ linenumber_ptr,
+ discriminator_ptr,
+ stash) != 0);
+
+ if (found)
+ break;
}
done: