diff options
Diffstat (limited to 'contrib/binutils/bfd/dwarf2.c')
| -rw-r--r-- | contrib/binutils/bfd/dwarf2.c | 715 |
1 files changed, 267 insertions, 448 deletions
diff --git a/contrib/binutils/bfd/dwarf2.c b/contrib/binutils/bfd/dwarf2.c index 0639826..6182ea9 100644 --- a/contrib/binutils/bfd/dwarf2.c +++ b/contrib/binutils/bfd/dwarf2.c @@ -1,6 +1,6 @@ /* DWARF 2 support. - Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 - Free Software Foundation, Inc. + Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, + 2004 Free Software Foundation, Inc. Adapted from gdb/dwarf2read.c by Gavin Koch of Cygnus Solutions (gavin@cygnus.com). @@ -61,21 +61,12 @@ struct attribute { char *str; struct dwarf_block *blk; - unsigned int unsnd; - int snd; - bfd_vma addr; + bfd_uint64_t val; + bfd_int64_t sval; } u; }; -/* Get at parts of an attribute structure. */ - -#define DW_STRING(attr) ((attr)->u.str) -#define DW_UNSND(attr) ((attr)->u.unsnd) -#define DW_BLOCK(attr) ((attr)->u.blk) -#define DW_SND(attr) ((attr)->u.snd) -#define DW_ADDR(attr) ((attr)->u.addr) - /* Blocks are a bunch of untyped bytes. */ struct dwarf_block { @@ -157,7 +148,7 @@ struct comp_unit /* The DW_AT_comp_dir attribute. */ char* comp_dir; - /* True if there is a line number table associated with this comp. unit. */ + /* TRUE if there is a line number table associated with this comp. unit. */ int stmtlist; /* The offset into .debug_line of the line number table. */ @@ -209,53 +200,6 @@ struct attr_abbrev #define ATTR_ALLOC_CHUNK 4 #endif -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 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 - PARAMS ((bfd *, char *, unsigned int *)); -static bfd_vma read_address PARAMS ((struct comp_unit *, char *)); -static struct abbrev_info *lookup_abbrev - PARAMS ((unsigned int, struct abbrev_info **)); -static struct abbrev_info **read_abbrevs - PARAMS ((bfd *, bfd_vma, struct dwarf2_debug *)); -static char *read_attribute - PARAMS ((struct attribute *, struct attr_abbrev *, - struct comp_unit *, char *)); -static char *read_attribute_value - PARAMS ((struct attribute *, unsigned, - struct comp_unit *, char *)); -static void add_line_info - PARAMS ((struct line_info_table *, bfd_vma, char *, - unsigned int, unsigned int, int)); -static char *concat_filename PARAMS ((struct line_info_table *, unsigned int)); -static void arange_add PARAMS ((struct comp_unit *, bfd_vma, bfd_vma)); -static struct line_info_table *decode_line_info - PARAMS ((struct comp_unit *, struct dwarf2_debug *)); -static boolean lookup_address_in_line_info_table - PARAMS ((struct line_info_table *, bfd_vma, struct funcinfo *, - const char **, unsigned int *)); -static boolean lookup_address_in_function_table - PARAMS ((struct funcinfo *, bfd_vma, struct funcinfo **, const char **)); -static boolean scan_unit_for_functions PARAMS ((struct comp_unit *)); -static bfd_vma find_rela_addend - PARAMS ((bfd *, asection *, bfd_size_type, asymbol**)); -static struct comp_unit *parse_comp_unit - PARAMS ((bfd *, struct dwarf2_debug *, bfd_vma, unsigned int)); -static boolean comp_unit_contains_address - PARAMS ((struct comp_unit *, bfd_vma)); -static boolean comp_unit_find_nearest_line - PARAMS ((struct comp_unit *, bfd_vma, const char **, const char **, - unsigned int *, struct dwarf2_debug *)); -static asection *find_debug_info PARAMS ((bfd *, asection *)); - /* VERBATIM The following function up to the END VERBATIM mark are copied directly from dwarf2read.c. */ @@ -263,74 +207,39 @@ static asection *find_debug_info PARAMS ((bfd *, asection *)); /* Read dwarf information from a buffer. */ static unsigned int -read_1_byte (abfd, buf) - bfd *abfd ATTRIBUTE_UNUSED; - char *buf; +read_1_byte (bfd *abfd ATTRIBUTE_UNUSED, char *buf) { - return bfd_get_8 (abfd, (bfd_byte *) buf); + return bfd_get_8 (abfd, buf); } static int -read_1_signed_byte (abfd, buf) - bfd *abfd ATTRIBUTE_UNUSED; - char *buf; +read_1_signed_byte (bfd *abfd ATTRIBUTE_UNUSED, char *buf) { - return bfd_get_signed_8 (abfd, (bfd_byte *) buf); + return bfd_get_signed_8 (abfd, buf); } static unsigned int -read_2_bytes (abfd, buf) - bfd *abfd; - char *buf; +read_2_bytes (bfd *abfd, char *buf) { - return bfd_get_16 (abfd, (bfd_byte *) buf); + return bfd_get_16 (abfd, buf); } -#if 0 /* This is not used. */ - -static int -read_2_signed_bytes (abfd, buf) - bfd *abfd; - char *buf; -{ - return bfd_get_signed_16 (abfd, (bfd_byte *) buf); -} - -#endif - static unsigned int -read_4_bytes (abfd, buf) - bfd *abfd; - char *buf; -{ - return bfd_get_32 (abfd, (bfd_byte *) buf); -} - -#if 0 /* This is not used. */ - -static int -read_4_signed_bytes (abfd, buf) - bfd *abfd; - char *buf; +read_4_bytes (bfd *abfd, char *buf) { - return bfd_get_signed_32 (abfd, (bfd_byte *) buf); + return bfd_get_32 (abfd, buf); } -#endif - -static bfd_vma -read_8_bytes (abfd, buf) - bfd *abfd; - char *buf; +static bfd_uint64_t +read_8_bytes (bfd *abfd, char *buf) { - return bfd_get_64 (abfd, (bfd_byte *) buf); + return bfd_get_64 (abfd, buf); } static char * -read_n_bytes (abfd, buf, size) - bfd *abfd ATTRIBUTE_UNUSED; - char *buf; - unsigned int size ATTRIBUTE_UNUSED; +read_n_bytes (bfd *abfd ATTRIBUTE_UNUSED, + char *buf, + unsigned int size ATTRIBUTE_UNUSED) { /* If the size of a host char is 8 bits, we can return a pointer to the buffer, otherwise we have to copy the data to a buffer @@ -339,10 +248,9 @@ read_n_bytes (abfd, buf, size) } static char * -read_string (abfd, buf, bytes_read_ptr) - bfd *abfd ATTRIBUTE_UNUSED; - char *buf; - unsigned int *bytes_read_ptr; +read_string (bfd *abfd ATTRIBUTE_UNUSED, + char *buf, + unsigned int *bytes_read_ptr) { /* Return a pointer to the embedded string. */ if (*buf == '\0') @@ -356,12 +264,11 @@ read_string (abfd, buf, bytes_read_ptr) } static char * -read_indirect_string (unit, buf, bytes_read_ptr) - struct comp_unit* unit; - char *buf; - unsigned int *bytes_read_ptr; +read_indirect_string (struct comp_unit* unit, + char *buf, + unsigned int *bytes_read_ptr) { - bfd_vma offset; + bfd_uint64_t offset; struct dwarf2_debug *stash = unit->stash; if (unit->offset_size == 4) @@ -385,12 +292,12 @@ read_indirect_string (unit, buf, bytes_read_ptr) } stash->dwarf_str_size = msec->_raw_size; - stash->dwarf_str_buffer = (char*) bfd_alloc (abfd, msec->_raw_size); + stash->dwarf_str_buffer = 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)) + 0, msec->_raw_size)) return NULL; } @@ -409,10 +316,9 @@ read_indirect_string (unit, buf, bytes_read_ptr) } static unsigned int -read_unsigned_leb128 (abfd, buf, bytes_read_ptr) - bfd *abfd ATTRIBUTE_UNUSED; - char *buf; - unsigned int *bytes_read_ptr; +read_unsigned_leb128 (bfd *abfd ATTRIBUTE_UNUSED, + char *buf, + unsigned int *bytes_read_ptr) { unsigned int result; unsigned int num_read; @@ -425,7 +331,7 @@ read_unsigned_leb128 (abfd, buf, bytes_read_ptr) do { - byte = bfd_get_8 (abfd, (bfd_byte *) buf); + byte = bfd_get_8 (abfd, buf); buf ++; num_read ++; result |= ((byte & 0x7f) << shift); @@ -439,10 +345,9 @@ read_unsigned_leb128 (abfd, buf, bytes_read_ptr) } static int -read_signed_leb128 (abfd, buf, bytes_read_ptr) - bfd *abfd ATTRIBUTE_UNUSED; - char *buf; - unsigned int * bytes_read_ptr; +read_signed_leb128 (bfd *abfd ATTRIBUTE_UNUSED, + char *buf, + unsigned int * bytes_read_ptr) { int result; int shift; @@ -455,7 +360,7 @@ read_signed_leb128 (abfd, buf, bytes_read_ptr) do { - byte = bfd_get_8 (abfd, (bfd_byte *) buf); + byte = bfd_get_8 (abfd, buf); buf ++; num_read ++; result |= ((byte & 0x7f) << shift); @@ -473,19 +378,17 @@ read_signed_leb128 (abfd, buf, bytes_read_ptr) /* END VERBATIM */ -static bfd_vma -read_address (unit, buf) - struct comp_unit* unit; - char *buf; +static bfd_uint64_t +read_address (struct comp_unit *unit, char *buf) { switch (unit->addr_size) { case 8: - return bfd_get_64 (unit->abfd, (bfd_byte *) buf); + return bfd_get_64 (unit->abfd, buf); case 4: - return bfd_get_32 (unit->abfd, (bfd_byte *) buf); + return bfd_get_32 (unit->abfd, buf); case 2: - return bfd_get_16 (unit->abfd, (bfd_byte *) buf); + return bfd_get_16 (unit->abfd, buf); default: abort (); } @@ -494,9 +397,7 @@ read_address (unit, buf) /* Lookup an abbrev_info structure in the abbrev hash table. */ static struct abbrev_info * -lookup_abbrev (number,abbrevs) - unsigned int number; - struct abbrev_info **abbrevs; +lookup_abbrev (unsigned int number, struct abbrev_info **abbrevs) { unsigned int hash_number; struct abbrev_info *abbrev; @@ -521,10 +422,7 @@ lookup_abbrev (number,abbrevs) in a hash table. */ static struct abbrev_info** -read_abbrevs (abfd, offset, stash) - bfd * abfd; - bfd_vma offset; - struct dwarf2_debug *stash; +read_abbrevs (bfd *abfd, bfd_uint64_t offset, struct dwarf2_debug *stash) { struct abbrev_info **abbrevs; char *abbrev_ptr; @@ -546,13 +444,11 @@ read_abbrevs (abfd, offset, stash) } stash->dwarf_abbrev_size = msec->_raw_size; - stash->dwarf_abbrev_buffer = (char*) bfd_alloc (abfd, msec->_raw_size); + stash->dwarf_abbrev_buffer + = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, + stash->syms); if (! stash->dwarf_abbrev_buffer) return 0; - - if (! bfd_get_section_contents (abfd, msec, stash->dwarf_abbrev_buffer, - (bfd_vma) 0, msec->_raw_size)) - return 0; } if (offset >= stash->dwarf_abbrev_size) @@ -564,7 +460,7 @@ read_abbrevs (abfd, offset, stash) } amt = sizeof (struct abbrev_info*) * ABBREV_HASH_SIZE; - abbrevs = (struct abbrev_info**) bfd_zalloc (abfd, amt); + abbrevs = bfd_zalloc (abfd, amt); abbrev_ptr = stash->dwarf_abbrev_buffer + offset; abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read); @@ -574,7 +470,7 @@ read_abbrevs (abfd, offset, stash) while (abbrev_number) { amt = sizeof (struct abbrev_info); - cur_abbrev = (struct abbrev_info *) bfd_zalloc (abfd, amt); + cur_abbrev = bfd_zalloc (abfd, amt); /* Read in abbrev header. */ cur_abbrev->number = abbrev_number; @@ -596,8 +492,7 @@ read_abbrevs (abfd, offset, stash) { amt = cur_abbrev->num_attrs + ATTR_ALLOC_CHUNK; amt *= sizeof (struct attr_abbrev); - cur_abbrev->attrs = ((struct attr_abbrev *) - bfd_realloc (cur_abbrev->attrs, amt)); + cur_abbrev->attrs = bfd_realloc (cur_abbrev->attrs, amt); if (! cur_abbrev->attrs) return 0; } @@ -638,11 +533,10 @@ read_abbrevs (abfd, offset, stash) /* Read an attribute value described by an attribute form. */ static char * -read_attribute_value (attr, form, unit, info_ptr) - struct attribute *attr; - unsigned form; - struct comp_unit *unit; - char *info_ptr; +read_attribute_value (struct attribute *attr, + unsigned form, + struct comp_unit *unit, + char *info_ptr) { bfd *abfd = unit->abfd; unsigned int bytes_read; @@ -654,101 +548,101 @@ 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. */ + /* FIXME: DWARF3 draft says DW_FORM_ref_addr is offset_size. */ case DW_FORM_ref_addr: - DW_ADDR (attr) = read_address (unit, info_ptr); + attr->u.val = read_address (unit, info_ptr); info_ptr += unit->addr_size; break; case DW_FORM_block2: amt = sizeof (struct dwarf_block); - blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + blk = bfd_alloc (abfd, amt); blk->size = read_2_bytes (abfd, info_ptr); info_ptr += 2; blk->data = read_n_bytes (abfd, info_ptr, blk->size); info_ptr += blk->size; - DW_BLOCK (attr) = blk; + attr->u.blk = blk; break; case DW_FORM_block4: amt = sizeof (struct dwarf_block); - blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + blk = bfd_alloc (abfd, amt); blk->size = read_4_bytes (abfd, info_ptr); info_ptr += 4; blk->data = read_n_bytes (abfd, info_ptr, blk->size); info_ptr += blk->size; - DW_BLOCK (attr) = blk; + attr->u.blk = blk; break; case DW_FORM_data2: - DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); + attr->u.val = read_2_bytes (abfd, info_ptr); info_ptr += 2; break; case DW_FORM_data4: - DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); + attr->u.val = read_4_bytes (abfd, info_ptr); info_ptr += 4; break; case DW_FORM_data8: - DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); + attr->u.val = read_8_bytes (abfd, info_ptr); info_ptr += 8; break; case DW_FORM_string: - DW_STRING (attr) = read_string (abfd, info_ptr, &bytes_read); + attr->u.str = 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); + attr->u.str = 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); + blk = bfd_alloc (abfd, amt); blk->size = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); info_ptr += bytes_read; blk->data = read_n_bytes (abfd, info_ptr, blk->size); info_ptr += blk->size; - DW_BLOCK (attr) = blk; + attr->u.blk = blk; break; case DW_FORM_block1: amt = sizeof (struct dwarf_block); - blk = (struct dwarf_block *) bfd_alloc (abfd, amt); + blk = bfd_alloc (abfd, amt); blk->size = read_1_byte (abfd, info_ptr); info_ptr += 1; blk->data = read_n_bytes (abfd, info_ptr, blk->size); info_ptr += blk->size; - DW_BLOCK (attr) = blk; + attr->u.blk = blk; break; case DW_FORM_data1: - DW_UNSND (attr) = read_1_byte (abfd, info_ptr); + attr->u.val = read_1_byte (abfd, info_ptr); info_ptr += 1; break; case DW_FORM_flag: - DW_UNSND (attr) = read_1_byte (abfd, info_ptr); + attr->u.val = read_1_byte (abfd, info_ptr); info_ptr += 1; break; case DW_FORM_sdata: - DW_SND (attr) = read_signed_leb128 (abfd, info_ptr, &bytes_read); + attr->u.sval = read_signed_leb128 (abfd, info_ptr, &bytes_read); info_ptr += bytes_read; break; case DW_FORM_udata: - DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + attr->u.val = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); info_ptr += bytes_read; break; case DW_FORM_ref1: - DW_UNSND (attr) = read_1_byte (abfd, info_ptr); + attr->u.val = read_1_byte (abfd, info_ptr); info_ptr += 1; break; case DW_FORM_ref2: - DW_UNSND (attr) = read_2_bytes (abfd, info_ptr); + attr->u.val = read_2_bytes (abfd, info_ptr); info_ptr += 2; break; case DW_FORM_ref4: - DW_UNSND (attr) = read_4_bytes (abfd, info_ptr); + attr->u.val = read_4_bytes (abfd, info_ptr); info_ptr += 4; break; case DW_FORM_ref8: - DW_UNSND (attr) = read_8_bytes (abfd, info_ptr); + attr->u.val = read_8_bytes (abfd, info_ptr); info_ptr += 8; break; case DW_FORM_ref_udata: - DW_UNSND (attr) = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); + attr->u.val = read_unsigned_leb128 (abfd, info_ptr, &bytes_read); info_ptr += bytes_read; break; case DW_FORM_indirect: @@ -767,11 +661,10 @@ read_attribute_value (attr, form, unit, info_ptr) /* Read an attribute described by an abbreviated attribute. */ static char * -read_attribute (attr, abbrev, unit, info_ptr) - struct attribute *attr; - struct attr_abbrev *abbrev; - struct comp_unit *unit; - char *info_ptr; +read_attribute (struct attribute *attr, + struct attr_abbrev *abbrev, + struct comp_unit *unit, + char *info_ptr) { attr->name = abbrev->name; info_ptr = read_attribute_value (attr, abbrev->form, unit, info_ptr); @@ -821,22 +714,21 @@ struct funcinfo bfd_vma high; }; -/* add_line_info: adds a new entry to the line_info list in the - line_info_table, ensuring that the list is sorted. Note that the - line_info list is sorted from highest to lowest VMA (with possible - duplicates); that is, line_info->prev_line always accesses an equal - or smaller VMA. */ +/* Adds a new entry to the line_info list in the line_info_table, ensuring + that the list is sorted. Note that the line_info list is sorted from + highest to lowest VMA (with possible duplicates); that is, + line_info->prev_line always accesses an equal or smaller VMA. */ + static void -add_line_info (table, address, filename, line, column, end_sequence) - struct line_info_table* table; - bfd_vma address; - char* filename; - unsigned int line; - unsigned int column; - int end_sequence; +add_line_info (struct line_info_table *table, + bfd_vma address, + char *filename, + unsigned int line, + unsigned int column, + int end_sequence) { bfd_size_type amt = sizeof (struct line_info); - struct line_info* info = (struct line_info*) bfd_alloc (table->abfd, amt); + struct line_info* info = bfd_alloc (table->abfd, amt); /* Find the correct location for 'info'. Normally we will receive new line_info data 1) in order and 2) with increasing VMAs. @@ -905,16 +797,26 @@ add_line_info (table, address, filename, line, column, end_sequence) /* Set member data of 'info'. */ info->address = address; - info->filename = filename; info->line = line; info->column = column; info->end_sequence = end_sequence; + + if (filename && filename[0]) + { + info->filename = bfd_alloc (table->abfd, strlen (filename) + 1); + if (info->filename) + strcpy (info->filename, filename); + } + else + info->filename = NULL; } +/* Extract a fully qualified filename from a line info table. + The returned string has been malloc'ed and it is the caller's + responsibility to free it. */ + static char * -concat_filename (table, file) - struct line_info_table* table; - unsigned int file; +concat_filename (struct line_info_table *table, unsigned int file) { char* filename; @@ -922,32 +824,36 @@ concat_filename (table, file) { (*_bfd_error_handler) (_("Dwarf Error: mangled line number section (bad file number).")); - return "<unknown>"; + return strdup ("<unknown>"); } filename = table->files[file - 1].name; - if (IS_ABSOLUTE_PATH(filename)) - return filename; - else + + if (! IS_ABSOLUTE_PATH (filename)) { char* dirname = (table->files[file - 1].dir ? table->dirs[table->files[file - 1].dir - 1] : table->comp_dir); - /* Not all tools set DW_AT_comp_dir, so dirname may be unknown. The - best we can do is return the filename part. */ - if (dirname == NULL) - return filename; - else - return (char*) concat (dirname, "/", filename, NULL); + /* Not all tools set DW_AT_comp_dir, so dirname may be unknown. + The best we can do is return the filename part. */ + if (dirname != NULL) + { + unsigned int len = strlen (dirname) + strlen (filename) + 2; + char * name; + + name = bfd_malloc (len); + if (name) + sprintf (name, "%s/%s", dirname, filename); + return name; + } } + + return strdup (filename); } static void -arange_add (unit, low_pc, high_pc) - struct comp_unit *unit; - bfd_vma low_pc; - bfd_vma high_pc; +arange_add (struct comp_unit *unit, bfd_vma low_pc, bfd_vma high_pc) { struct arange *arange; @@ -980,8 +886,7 @@ arange_add (unit, low_pc, high_pc) } /* Need to allocate a new arange and insert it into the arange list. */ - arange = (struct arange *) - bfd_zalloc (unit->abfd, (bfd_size_type) sizeof (*arange)); + arange = bfd_zalloc (unit->abfd, sizeof (*arange)); arange->low = low_pc; arange->high = high_pc; @@ -992,9 +897,7 @@ arange_add (unit, low_pc, high_pc) /* Decode the line number information for UNIT. */ static struct line_info_table* -decode_line_info (unit, stash) - struct comp_unit *unit; - struct dwarf2_debug *stash; +decode_line_info (struct comp_unit *unit, struct dwarf2_debug *stash) { bfd *abfd = unit->abfd; struct line_info_table* table; @@ -1019,21 +922,15 @@ decode_line_info (unit, stash) } stash->dwarf_line_size = msec->_raw_size; - stash->dwarf_line_buffer = (char *) bfd_alloc (abfd, msec->_raw_size); + stash->dwarf_line_buffer + = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, + stash->syms); if (! stash->dwarf_line_buffer) return 0; - - if (! bfd_get_section_contents (abfd, msec, stash->dwarf_line_buffer, - (bfd_vma) 0, msec->_raw_size)) - return 0; - - /* FIXME: We ought to apply the relocs against this section before - we process it... */ } - /* Since we are using un-relocated data, it is possible to get a bad value - for the line_offset. Validate it here so that we won't get a segfault - below. */ + /* It is possible to get a bad value for the line_offset. Validate + it here so that we won't get a segfault below. */ if (unit->line_offset >= stash->dwarf_line_size) { (*_bfd_error_handler) (_("Dwarf Error: Line offset (%lu) greater than or equal to .debug_line size (%lu)."), @@ -1043,7 +940,7 @@ decode_line_info (unit, stash) } amt = sizeof (struct line_info_table); - table = (struct line_info_table*) bfd_alloc (abfd, amt); + table = bfd_alloc (abfd, amt); table->abfd = abfd; table->comp_dir = unit->comp_dir; @@ -1095,7 +992,7 @@ decode_line_info (unit, stash) lh.opcode_base = read_1_byte (abfd, line_ptr); line_ptr += 1; amt = lh.opcode_base * sizeof (unsigned char); - lh.standard_opcode_lengths = (unsigned char *) bfd_alloc (abfd, amt); + lh.standard_opcode_lengths = bfd_alloc (abfd, amt); lh.standard_opcode_lengths[0] = 1; @@ -1114,7 +1011,7 @@ decode_line_info (unit, stash) { amt = table->num_dirs + DIR_ALLOC_CHUNK; amt *= sizeof (char *); - table->dirs = (char **) bfd_realloc (table->dirs, amt); + table->dirs = bfd_realloc (table->dirs, amt); if (! table->dirs) return 0; } @@ -1133,7 +1030,7 @@ decode_line_info (unit, stash) { amt = table->num_files + FILE_ALLOC_CHUNK; amt *= sizeof (struct fileinfo); - table->files = (struct fileinfo *) bfd_realloc (table->files, amt); + table->files = bfd_realloc (table->files, amt); if (! table->files) return 0; } @@ -1158,7 +1055,7 @@ decode_line_info (unit, stash) { /* State machine registers. */ bfd_vma address = 0; - char * filename = concat_filename (table, 1); + char * filename = table->num_files ? concat_filename (table, 1) : NULL; unsigned int line = 1; unsigned int column = 0; int is_stmt = lh.default_is_stmt; @@ -1224,8 +1121,7 @@ decode_line_info (unit, stash) { amt = table->num_files + FILE_ALLOC_CHUNK; amt *= sizeof (struct fileinfo); - table->files = - (struct fileinfo *) bfd_realloc (table->files, amt); + table->files = bfd_realloc (table->files, amt); if (! table->files) return 0; } @@ -1272,6 +1168,8 @@ decode_line_info (unit, stash) based, the references are 1 based. */ file = read_unsigned_leb128 (abfd, line_ptr, &bytes_read); line_ptr += bytes_read; + if (filename) + free (filename); filename = concat_filename (table, file); break; } @@ -1296,6 +1194,7 @@ decode_line_info (unit, stash) default: { int i; + /* Unknown standard opcode, ignore it. */ for (i = 0; i < lh.standard_opcode_lengths[op_code]; i++) { @@ -1305,23 +1204,24 @@ decode_line_info (unit, stash) } } } + + if (filename) + free (filename); } return table; } -/* If ADDR is within TABLE set the output parameters and return true, - otherwise return false. The output parameters, FILENAME_PTR and +/* If ADDR is within TABLE set the output parameters and return TRUE, + otherwise return FALSE. The output parameters, FILENAME_PTR and LINENUMBER_PTR, are pointers to the objects to be filled in. */ -static boolean -lookup_address_in_line_info_table (table, addr, function, filename_ptr, - linenumber_ptr) - struct line_info_table* table; - bfd_vma addr; - struct funcinfo *function; - const char **filename_ptr; - unsigned int *linenumber_ptr; +static bfd_boolean +lookup_address_in_line_info_table (struct line_info_table *table, + bfd_vma addr, + struct funcinfo *function, + const char **filename_ptr, + unsigned int *linenumber_ptr) { /* Note: table->last_line should be a descendingly sorted list. */ struct line_info* next_line = table->last_line; @@ -1329,7 +1229,7 @@ lookup_address_in_line_info_table (table, addr, function, filename_ptr, *filename_ptr = NULL; if (!next_line) - return false; + return FALSE; each_line = next_line->prev_line; @@ -1343,10 +1243,10 @@ lookup_address_in_line_info_table (table, addr, function, filename_ptr, /* If we have an address match, save this info. This allows us to return as good as results as possible for strange debugging info. */ - boolean addr_match = false; + bfd_boolean addr_match = FALSE; if (each_line->address <= addr && addr <= next_line->address) { - addr_match = true; + addr_match = TRUE; /* If this line appears to span functions, and addr is in the later function, return the first line of that function instead @@ -1367,7 +1267,7 @@ lookup_address_in_line_info_table (table, addr, function, filename_ptr, } if (addr_match && !each_line->end_sequence) - return true; /* we have definitely found what we want */ + return TRUE; /* we have definitely found what we want */ next_line = each_line; each_line = each_line->prev_line; @@ -1383,23 +1283,21 @@ lookup_address_in_line_info_table (table, addr, function, filename_ptr, { *filename_ptr = next_line->filename; *linenumber_ptr = next_line->line; - return true; + return TRUE; } - return false; + return FALSE; } /* Function table functions. */ -/* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return true. */ +/* If ADDR is within TABLE, set FUNCTIONNAME_PTR, and return TRUE. */ -static boolean -lookup_address_in_function_table (table, addr, function_ptr, - functionname_ptr) - struct funcinfo* table; - bfd_vma addr; - struct funcinfo** function_ptr; - const char **functionname_ptr; +static bfd_boolean +lookup_address_in_function_table (struct funcinfo *table, + bfd_vma addr, + struct funcinfo **function_ptr, + const char **functionname_ptr) { struct funcinfo* each_func; @@ -1411,11 +1309,11 @@ lookup_address_in_function_table (table, addr, function_ptr, { *functionname_ptr = each_func->name; *function_ptr = each_func; - return true; + return TRUE; } } - return false; + return FALSE; } /* DWARF2 Compilation unit functions. */ @@ -1423,9 +1321,8 @@ lookup_address_in_function_table (table, addr, function_ptr, /* Scan over each die in a comp. unit looking for functions to add to the function table. */ -static boolean -scan_unit_for_functions (unit) - struct comp_unit *unit; +static bfd_boolean +scan_unit_for_functions (struct comp_unit *unit) { bfd *abfd = unit->abfd; char *info_ptr = unit->first_child_die_ptr; @@ -1454,13 +1351,13 @@ scan_unit_for_functions (unit) (*_bfd_error_handler) (_("Dwarf Error: Could not find abbrev number %u."), abbrev_number); bfd_set_error (bfd_error_bad_value); - return false; + return FALSE; } if (abbrev->tag == DW_TAG_subprogram) { bfd_size_type amt = sizeof (struct funcinfo); - func = (struct funcinfo *) bfd_zalloc (abfd, amt); + func = bfd_zalloc (abfd, amt); func->prev_func = unit->function_table; unit->function_table = func; } @@ -1477,23 +1374,23 @@ scan_unit_for_functions (unit) { case DW_AT_name: - name = DW_STRING (&attr); + name = attr.u.str; /* Prefer DW_AT_MIPS_linkage_name over DW_AT_name. */ if (func->name == NULL) - func->name = DW_STRING (&attr); + func->name = attr.u.str; break; case DW_AT_MIPS_linkage_name: - func->name = DW_STRING (&attr); + func->name = attr.u.str; break; case DW_AT_low_pc: - func->low = DW_ADDR (&attr); + func->low = attr.u.val; break; case DW_AT_high_pc: - func->high = DW_ADDR (&attr); + func->high = attr.u.val; break; default: @@ -1505,7 +1402,7 @@ scan_unit_for_functions (unit) switch (attr.name) { case DW_AT_name: - name = DW_STRING (&attr); + name = attr.u.str; break; default: @@ -1518,66 +1415,12 @@ scan_unit_for_functions (unit) nesting_level++; } - return true; -} - -/* Look for a RELA relocation to be applied on OFFSET of section SEC, - and return the addend if such a relocation is found. Since this is - only used to find relocations referring to the .debug_abbrev - section, we make sure the relocation refers to this section, but - this is not strictly necessary, and it can probably be safely - removed if needed. However, it is important to note that this - function only returns the addend, it doesn't serve the purpose of - applying a generic relocation. - - If no suitable relocation is found, or if it is not a real RELA - relocation, this function returns 0. */ - -static bfd_vma -find_rela_addend (abfd, sec, offset, syms) - bfd* abfd; - asection* sec; - bfd_size_type offset; - asymbol** syms; -{ - long reloc_size = bfd_get_reloc_upper_bound (abfd, sec); - arelent **relocs = NULL; - long reloc_count, relc; - - if (reloc_size <= 0) - return 0; - - relocs = (arelent **) bfd_malloc ((bfd_size_type) reloc_size); - if (relocs == NULL) - return 0; - - reloc_count = bfd_canonicalize_reloc (abfd, sec, relocs, syms); - - if (reloc_count <= 0) - { - free (relocs); - return 0; - } - - for (relc = 0; relc < reloc_count; relc++) - if (relocs[relc]->address == offset - && (*relocs[relc]->sym_ptr_ptr)->flags & BSF_SECTION_SYM - && strcmp ((*relocs[relc]->sym_ptr_ptr)->name, - ".debug_abbrev") == 0) - { - bfd_vma addend = (relocs[relc]->howto->partial_inplace - ? 0 : relocs[relc]->addend); - free (relocs); - return addend; - } - - free (relocs); - return 0; + return TRUE; } /* Parse a DWARF2 compilation unit starting at INFO_PTR. This includes the compilation unit header that proceeds the DIE's, but - does not include the length field that preceeds each compilation + does not include the length field that precedes each compilation unit header. END_PTR points one past the end of this comp unit. OFFSET_SIZE is the size of DWARF2 offsets (either 4 or 8 bytes). @@ -1585,15 +1428,14 @@ find_rela_addend (abfd, sec, offset, syms) to get to the line number information for the compilation unit. */ static struct comp_unit * -parse_comp_unit (abfd, stash, unit_length, offset_size) - bfd* abfd; - struct dwarf2_debug *stash; - bfd_vma unit_length; - unsigned int offset_size; +parse_comp_unit (bfd *abfd, + struct dwarf2_debug *stash, + bfd_vma unit_length, + unsigned int offset_size) { struct comp_unit* unit; unsigned int version; - bfd_vma abbrev_offset = 0; + bfd_uint64_t abbrev_offset = 0; unsigned int addr_size; struct abbrev_info** abbrevs; unsigned int abbrev_number, bytes_read, i; @@ -1602,7 +1444,6 @@ parse_comp_unit (abfd, stash, unit_length, offset_size) char *info_ptr = stash->info_ptr; char *end_ptr = info_ptr + unit_length; bfd_size_type amt; - bfd_size_type off; version = read_2_bytes (abfd, info_ptr); info_ptr += 2; @@ -1611,12 +1452,6 @@ parse_comp_unit (abfd, stash, unit_length, offset_size) abbrev_offset = read_4_bytes (abfd, info_ptr); 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 - relocation and extract the addend to obtain the actual - 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 += offset_size; addr_size = read_1_byte (abfd, info_ptr); info_ptr += 1; @@ -1669,7 +1504,7 @@ parse_comp_unit (abfd, stash, unit_length, offset_size) } amt = sizeof (struct comp_unit); - unit = (struct comp_unit*) bfd_zalloc (abfd, amt); + unit = bfd_zalloc (abfd, amt); unit->abfd = abfd; unit->addr_size = addr_size; unit->offset_size = offset_size; @@ -1687,29 +1522,29 @@ parse_comp_unit (abfd, stash, unit_length, offset_size) { case DW_AT_stmt_list: unit->stmtlist = 1; - unit->line_offset = DW_UNSND (&attr); + unit->line_offset = attr.u.val; break; case DW_AT_name: - unit->name = DW_STRING (&attr); + unit->name = attr.u.str; break; case DW_AT_low_pc: - unit->arange.low = DW_ADDR (&attr); + unit->arange.low = attr.u.val; break; case DW_AT_high_pc: - unit->arange.high = DW_ADDR (&attr); + unit->arange.high = attr.u.val; break; case DW_AT_comp_dir: { - char* comp_dir = DW_STRING (&attr); + char* comp_dir = attr.u.str; if (comp_dir) { /* Irix 6.2 native cc prepends <machine>.: to the compilation directory, get rid of it. */ - char *cp = (char*) strchr (comp_dir, ':'); + char *cp = strchr (comp_dir, ':'); if (cp && cp != comp_dir && cp[-1] == '.' && cp[1] == '/') comp_dir = cp + 1; @@ -1727,28 +1562,26 @@ parse_comp_unit (abfd, stash, unit_length, offset_size) return unit; } -/* Return true if UNIT contains the address given by ADDR. */ +/* Return TRUE if UNIT contains the address given by ADDR. */ -static boolean -comp_unit_contains_address (unit, addr) - struct comp_unit* unit; - bfd_vma addr; +static bfd_boolean +comp_unit_contains_address (struct comp_unit *unit, bfd_vma addr) { struct arange *arange; if (unit->error) - return false; + return FALSE; arange = &unit->arange; do { if (addr >= arange->low && addr < arange->high) - return true; + return TRUE; arange = arange->next; } while (arange); - return false; + return FALSE; } /* If UNIT contains ADDR, set the output parameters to the values for @@ -1756,32 +1589,30 @@ comp_unit_contains_address (unit, addr) FUNCTIONNAME_PTR, and LINENUMBER_PTR, are pointers to the objects to be filled in. - Return true of UNIT contains ADDR, and no errors were encountered; - false otherwise. */ - -static boolean -comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr, - linenumber_ptr, stash) - struct comp_unit* unit; - bfd_vma addr; - const char **filename_ptr; - const char **functionname_ptr; - unsigned int *linenumber_ptr; - struct dwarf2_debug *stash; + Return TRUE if UNIT contains ADDR, and no errors were encountered; + FALSE otherwise. */ + +static bfd_boolean +comp_unit_find_nearest_line (struct comp_unit *unit, + bfd_vma addr, + const char **filename_ptr, + const char **functionname_ptr, + unsigned int *linenumber_ptr, + struct dwarf2_debug *stash) { - boolean line_p; - boolean func_p; + bfd_boolean line_p; + bfd_boolean func_p; struct funcinfo *function; if (unit->error) - return false; + return FALSE; if (! unit->line_table) { if (! unit->stmtlist) { unit->error = 1; - return false; + return FALSE; } unit->line_table = decode_line_info (unit, stash); @@ -1789,14 +1620,14 @@ comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr, if (! unit->line_table) { unit->error = 1; - return false; + return FALSE; } if (unit->first_child_die_ptr < unit->end_ptr && ! scan_unit_for_functions (unit)) { unit->error = 1; - return false; + return FALSE; } } @@ -1806,7 +1637,7 @@ comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr, line_p = lookup_address_in_line_info_table (unit->line_table, addr, function, filename_ptr, linenumber_ptr); - return (boolean) (line_p || func_p); + return line_p || func_p; } /* Locate a section in a BFD containing debugging info. The search starts @@ -1822,9 +1653,7 @@ comp_unit_find_nearest_line (unit, addr, filename_ptr, functionname_ptr, #define GNU_LINKONCE_INFO ".gnu.linkonce.wi." static asection * -find_debug_info (abfd, after_sec) - bfd * abfd; - asection * after_sec; +find_debug_info (bfd *abfd, asection *after_sec) { asection * msec; @@ -1847,25 +1676,22 @@ find_debug_info (abfd, after_sec) return NULL; } -/* The DWARF2 version of find_nearest line. Return true if the line +/* The DWARF2 version of find_nearest line. Return TRUE if the line is found without error. ADDR_SIZE is the number of bytes in the initial .debug_info length field and in the abbreviation offset. You may use zero to indicate that the default value should be used. */ -boolean -_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, - filename_ptr, functionname_ptr, - linenumber_ptr, addr_size, pinfo) - bfd *abfd; - asection *section; - asymbol **symbols; - bfd_vma offset; - const char **filename_ptr; - const char **functionname_ptr; - unsigned int *linenumber_ptr; - unsigned int addr_size; - PTR *pinfo; +bfd_boolean +_bfd_dwarf2_find_nearest_line (bfd *abfd, + asection *section, + asymbol **symbols, + bfd_vma offset, + const char **filename_ptr, + const char **functionname_ptr, + unsigned int *linenumber_ptr, + unsigned int addr_size, + void **pinfo) { /* Read each compilation unit from the section .debug_info, and check to see if it contains the address we are searching for. If yes, @@ -1875,7 +1701,7 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, We keep a list of all the previously read compilation units, and a pointer to the next un-read compilation unit. Check the previously read units before reading more. */ - struct dwarf2_debug *stash = (struct dwarf2_debug *) *pinfo; + struct dwarf2_debug *stash = *pinfo; /* What address are we looking for? */ bfd_vma addr = offset + section->vma; @@ -1899,18 +1725,18 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, asection *msec; bfd_size_type amt = sizeof (struct dwarf2_debug); - stash = (struct dwarf2_debug*) bfd_zalloc (abfd, amt); + stash = bfd_zalloc (abfd, amt); if (! stash) - return false; + return FALSE; - *pinfo = (PTR) stash; + *pinfo = stash; msec = find_debug_info (abfd, NULL); if (! msec) /* No dwarf2 info. Note that at this point the stash has been allocated, but contains zeros, this lets future calls to this function fail quicker. */ - return false; + return FALSE; /* There can be more than one DWARF2 info section in a BFD these days. Read them all in and produce one large stash. We do this in two @@ -1920,9 +1746,9 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, for (total_size = 0; msec; msec = find_debug_info (abfd, msec)) total_size += msec->_raw_size; - stash->info_ptr = (char *) bfd_alloc (abfd, total_size); + stash->info_ptr = bfd_alloc (abfd, total_size); if (stash->info_ptr == NULL) - return false; + return FALSE; stash->info_ptr_end = stash->info_ptr; @@ -1939,8 +1765,8 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, start = stash->info_ptr_end - stash->info_ptr; - if (! bfd_get_section_contents (abfd, msec, stash->info_ptr + start, - (bfd_vma) 0, size)) + if ((bfd_simple_get_relocated_section_contents + (abfd, msec, stash->info_ptr + start, symbols)) == NULL) continue; stash->info_ptr_end = stash->info_ptr + start + size; @@ -1953,25 +1779,10 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, stash->syms = symbols; } - /* FIXME: There is a problem with the contents of the - .debug_info section. The 'low' and 'high' addresses of the - comp_units are computed by relocs against symbols in the - .text segment. We need these addresses in order to determine - the nearest line number, and so we have to resolve the - relocs. There is a similar problem when the .debug_line - section is processed as well (e.g., there may be relocs - against the operand of the DW_LNE_set_address operator). - - Unfortunately getting hold of the reloc information is hard... - - For now, this means that disassembling object files (as - opposed to fully executables) does not always work as well as - we would like. */ - /* A null info_ptr indicates that there is no dwarf2 info (or that an error occured while setting up the stash). */ if (! stash->info_ptr) - return false; + return FALSE; /* Check the previously read comp. units first. */ for (each = stash->all_comp_units; each; each = each->next_unit) @@ -1984,29 +1795,37 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, while (stash->info_ptr < stash->info_ptr_end) { bfd_vma length; - boolean found; + bfd_boolean found; unsigned int offset_size = addr_size; - if (addr_size == 4) + length = read_4_bytes (abfd, stash->info_ptr); + /* A 0xffffff length is the DWARF3 way of indicating we use + 64-bit offsets, instead of 32-bit offsets. */ + if (length == 0xffffffff) { - 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 if (length == 0) - { - /* Handle (non-standard) 64-bit DWARF2 formats. */ - offset_size = 8; - length = read_4_bytes (abfd, stash->info_ptr + 4); - stash->info_ptr += 4; - } + offset_size = 8; + length = read_8_bytes (abfd, stash->info_ptr + 4); + 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 (abfd, stash->info_ptr + 4); + stash->info_ptr += 8; + } + /* In the absence of the hints above, we assume addr_size-sized + offsets, for backward-compatibility with pre-DWARF3 64-bit + platforms. */ + else if (addr_size == 8) + { + length = read_8_bytes (abfd, stash->info_ptr); + stash->info_ptr += 8; } else - length = read_8_bytes (abfd, stash->info_ptr); - stash->info_ptr += addr_size; + stash->info_ptr += 4; if (length > 0) { @@ -2034,10 +1853,10 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, { if (comp_unit_contains_address (each, addr)) return comp_unit_find_nearest_line (each, addr, - filename_ptr, - functionname_ptr, - linenumber_ptr, - stash); + filename_ptr, + functionname_ptr, + linenumber_ptr, + stash); } else { @@ -2047,11 +1866,11 @@ _bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, linenumber_ptr, stash); if (found) - return true; + return TRUE; } } } } - return false; + return FALSE; } |
