diff options
Diffstat (limited to 'bfd/dwarf2.c')
| -rw-r--r-- | bfd/dwarf2.c | 130 |
1 files changed, 108 insertions, 22 deletions
diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c index 3a7614d..6398d4e 100644 --- a/bfd/dwarf2.c +++ b/bfd/dwarf2.c @@ -40,7 +40,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ struct line_head { - unsigned int total_length; + bfd_vma total_length; unsigned short version; unsigned int prologue_length; unsigned char minimum_instruction_length; @@ -115,6 +115,12 @@ struct dwarf2_debug /* Length of the loaded .debug_line section. */ unsigned long dwarf_line_size; + + /* Pointer to the .debug_str section loaded into memory. */ + char* dwarf_str_buffer; + + /* Length of the loaded .debug_str section. */ + unsigned long dwarf_str_size; }; struct arange @@ -169,8 +175,14 @@ struct comp_unit /* A list of the functions found in this comp. unit. */ struct funcinfo* function_table; + /* Pointer to dwarf2_debug structure. */ + struct dwarf2_debug *stash; + /* Address size for this unit - from unit header. */ unsigned char addr_size; + + /* Offset size for this unit - from unit header. */ + unsigned char offset_size; }; /* This data structure holds the information of an abbrev. */ @@ -201,9 +213,10 @@ static unsigned int read_1_byte PARAMS ((bfd *, char *)); static int read_1_signed_byte PARAMS ((bfd *, char *)); static unsigned int read_2_bytes PARAMS ((bfd *, char *)); static unsigned int read_4_bytes PARAMS ((bfd *, char *)); -static unsigned int read_8_bytes PARAMS ((bfd *, char *)); +static bfd_vma read_8_bytes PARAMS ((bfd *, char *)); static char *read_n_bytes PARAMS ((bfd *, char *, unsigned int)); static char *read_string PARAMS ((bfd *, char *, unsigned int *)); +static char *read_indirect_string PARAMS ((struct comp_unit *, char *, unsigned int *)); static unsigned int read_unsigned_leb128 PARAMS ((bfd *, char *, unsigned int *)); static int read_signed_leb128 @@ -304,7 +317,7 @@ read_4_signed_bytes (abfd, buf) #endif -static unsigned int +static bfd_vma read_8_bytes (abfd, buf) bfd *abfd; char *buf; @@ -330,9 +343,7 @@ read_string (abfd, buf, bytes_read_ptr) char *buf; unsigned int *bytes_read_ptr; { - /* If the size of a host char is 8 bits, we can return a pointer - to the string, otherwise we have to copy the string to a buffer - allocated on the temporary obstack. */ + /* Return a pointer to the embedded string. */ if (*buf == '\0') { *bytes_read_ptr = 1; @@ -343,6 +354,59 @@ read_string (abfd, buf, bytes_read_ptr) return buf; } +static char * +read_indirect_string (unit, buf, bytes_read_ptr) + struct comp_unit* unit; + char *buf; + unsigned int *bytes_read_ptr; +{ + bfd_vma offset; + struct dwarf2_debug *stash = unit->stash; + + if (unit->offset_size == 4) + offset = read_4_bytes (unit->abfd, buf); + else + offset = read_8_bytes (unit->abfd, buf); + *bytes_read_ptr = unit->offset_size; + + if (! stash->dwarf_str_buffer) + { + asection *msec; + bfd *abfd = unit->abfd; + + msec = bfd_get_section_by_name (abfd, ".debug_str"); + if (! msec) + { + (*_bfd_error_handler) + (_("Dwarf Error: Can't find .debug_str section.")); + bfd_set_error (bfd_error_bad_value); + return NULL; + } + + stash->dwarf_str_size = msec->_raw_size; + stash->dwarf_str_buffer = (char*) bfd_alloc (abfd, msec->_raw_size); + if (! stash->dwarf_abbrev_buffer) + return NULL; + + if (! bfd_get_section_contents (abfd, msec, stash->dwarf_str_buffer, + (bfd_vma) 0, msec->_raw_size)) + return NULL; + } + + if (offset >= stash->dwarf_str_size) + { + (*_bfd_error_handler) (_("Dwarf Error: DW_FORM_strp offset (%u) greater than or equal to .debug_str size (%u)."), + offset, stash->dwarf_str_size ); + bfd_set_error (bfd_error_bad_value); + return NULL; + } + + buf = stash->dwarf_str_buffer + offset; + if (*buf == '\0') + return NULL; + return buf; +} + static unsigned int read_unsigned_leb128 (abfd, buf, bytes_read_ptr) bfd *abfd ATTRIBUTE_UNUSED; @@ -586,6 +650,7 @@ read_attribute_value (attr, form, unit, info_ptr) switch (form) { case DW_FORM_addr: + /* FIXME: DWARF3 draft sais DW_FORM_ref_addr is offset_size. */ case DW_FORM_ref_addr: DW_ADDR (attr) = read_address (unit, info_ptr); info_ptr += unit->addr_size; @@ -624,6 +689,10 @@ read_attribute_value (attr, form, unit, info_ptr) DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); info_ptr += bytes_read; break; + case DW_FORM_strp: + DW_STRING (attr) = read_indirect_string (unit, info_ptr, &bytes_read); + info_ptr += bytes_read; + break; case DW_FORM_block: amt = sizeof (struct dwarf_block); blk = (struct dwarf_block *) bfd_alloc (abfd, amt); @@ -683,7 +752,6 @@ read_attribute_value (attr, form, unit, info_ptr) info_ptr += bytes_read; info_ptr = read_attribute_value (attr, form, unit, info_ptr); break; - case DW_FORM_strp: default: (*_bfd_error_handler) (_("Dwarf Error: Invalid or unhandled FORM value: %d."), form); @@ -846,7 +914,7 @@ decode_line_info (unit, stash) char *line_ptr; char *line_end; struct line_head lh; - unsigned int i, bytes_read; + unsigned int i, bytes_read, offset_size; char *cur_file, *cur_dir; unsigned char op_code, extended_op, adj_opcode; bfd_size_type amt; @@ -906,11 +974,21 @@ decode_line_info (unit, stash) /* Read in the prologue. */ lh.total_length = read_4_bytes (abfd, line_ptr); line_ptr += 4; + offset_size = 4; + if (lh.total_length == 0xffffffff) + { + lh.total_length = read_8_bytes (abfd, line_ptr); + line_ptr += 8; + offset_size = 8; + } line_end = line_ptr + lh.total_length; lh.version = read_2_bytes (abfd, line_ptr); line_ptr += 2; - lh.prologue_length = read_4_bytes (abfd, line_ptr); - line_ptr += 4; + if (offset_size == 4) + lh.prologue_length = read_4_bytes (abfd, line_ptr); + else + lh.prologue_length = read_8_bytes (abfd, line_ptr); + line_ptr += offset_size; lh.minimum_instruction_length = read_1_byte (abfd, line_ptr); line_ptr += 1; lh.default_is_stmt = read_1_byte (abfd, line_ptr); @@ -1365,18 +1443,17 @@ find_rela_addend (abfd, sec, offset, syms) includes the compilation unit header that proceeds the DIE's, but does not include the length field that preceeds each compilation unit header. END_PTR points one past the end of this comp unit. - If ABBREV_LENGTH is 0, then the length of the abbreviation offset - is assumed to be four bytes. Otherwise, it it is the size given. + OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). This routine does not read the whole compilation unit; only enough to get to the line number information for the compilation unit. */ static struct comp_unit * -parse_comp_unit (abfd, stash, unit_length, abbrev_length) +parse_comp_unit (abfd, stash, unit_length, offset_size) bfd* abfd; struct dwarf2_debug *stash; bfd_vma unit_length; - unsigned int abbrev_length; + unsigned int offset_size; { struct comp_unit* unit; @@ -1396,12 +1473,10 @@ parse_comp_unit (abfd, stash, unit_length, abbrev_length) version = read_2_bytes (abfd, info_ptr); info_ptr += 2; - BFD_ASSERT (abbrev_length == 0 - || abbrev_length == 4 - || abbrev_length == 8); - if (abbrev_length == 0 || abbrev_length == 4) + BFD_ASSERT (offset_size == 4 || offset_size == 8); + if (offset_size == 4) abbrev_offset = read_4_bytes (abfd, info_ptr); - else if (abbrev_length == 8) + else abbrev_offset = read_8_bytes (abfd, info_ptr); /* The abbrev offset is generally a relocation pointing to .debug_abbrev+offset. On RELA targets, we have to find the @@ -1409,7 +1484,7 @@ parse_comp_unit (abfd, stash, unit_length, abbrev_length) abbrev_offset, so do it here. */ off = info_ptr - stash->sec_info_ptr; abbrev_offset += find_rela_addend (abfd, stash->sec, off, stash->syms); - info_ptr += abbrev_length; + info_ptr += offset_size; addr_size = read_1_byte (abfd, info_ptr); info_ptr += 1; @@ -1464,8 +1539,10 @@ parse_comp_unit (abfd, stash, unit_length, abbrev_length) unit = (struct comp_unit*) bfd_zalloc (abfd, amt); unit->abfd = abfd; unit->addr_size = addr_size; + unit->offset_size = offset_size; unit->abbrevs = abbrevs; unit->end_ptr = end_ptr; + unit->stash = stash; for (i = 0; i < abbrev->num_attrs; ++i) { @@ -1776,16 +1853,25 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, { bfd_vma length; boolean found; + unsigned int offset_size = addr_size; if (addr_size == 4) - length = read_4_bytes (abfd, stash->info_ptr); + { + length = read_4_bytes (abfd, stash->info_ptr); + if (length == 0xffffffff) + { + offset_size = 8; + length = read_8_bytes (abfd, stash->info_ptr + 4); + stash->info_ptr += 8; + } + } else length = read_8_bytes (abfd, stash->info_ptr); stash->info_ptr += addr_size; if (length > 0) { - each = parse_comp_unit (abfd, stash, length, addr_size); + each = parse_comp_unit (abfd, stash, length, offset_size); stash->info_ptr += length; if ((bfd_vma) (stash->info_ptr - stash->sec_info_ptr) |