+static unsigned long
+calc_gnu_debuglink_crc32 (unsigned long crc,
+ const unsigned char * buf,
+ bfd_size_type len)
+{
+ static const unsigned long crc32_table[256] =
+ {
+ 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
+ 0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
+ 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
+ 0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+ 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
+ 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
+ 0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
+ 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+ 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
+ 0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
+ 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
+ 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+ 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
+ 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
+ 0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
+ 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+ 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
+ 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
+ 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
+ 0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+ 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
+ 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
+ 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
+ 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+ 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
+ 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
+ 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
+ 0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+ 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
+ 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
+ 0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
+ 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+ 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
+ 0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
+ 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
+ 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+ 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
+ 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
+ 0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
+ 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+ 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
+ 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
+ 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
+ 0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+ 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
+ 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
+ 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
+ 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+ 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
+ 0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
+ 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
+ 0x2d02ef8d
+ };
+ const unsigned char *end;
+
+ crc = ~crc & 0xffffffff;
+ for (end = buf + len; buf < end; ++ buf)
+ crc = crc32_table[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+ return ~crc & 0xffffffff;
+}
+
+typedef bfd_boolean (* check_func_type) (const char *, void *);
+typedef const char * (* parse_func_type) (struct dwarf_section *, void *);
+
+static bfd_boolean
+check_gnu_debuglink (const char * pathname, void * crc_pointer)
+{
+ static unsigned char buffer [8 * 1024];
+ FILE * f;
+ bfd_size_type count;
+ unsigned long crc = 0;
+ void * sep_data;
+
+ sep_data = open_debug_file (pathname);
+ if (sep_data == NULL)
+ return FALSE;
+
+ /* Yes - we are opening the file twice... */
+ f = fopen (pathname, "rb");
+ if (f == NULL)
+ {
+ /* Paranoia: This should never happen. */
+ close_debug_file (sep_data);
+ warn (_("Unable to reopen separate debug info file: %s\n"), pathname);
+ return FALSE;
+ }
+
+ while ((count = fread (buffer, 1, sizeof (buffer), f)) > 0)
+ crc = calc_gnu_debuglink_crc32 (crc, buffer, count);
+
+ fclose (f);
+
+ if (crc != * (unsigned long *) crc_pointer)
+ {
+ close_debug_file (sep_data);
+ warn (_("Separate debug info file %s found, but CRC does not match - ignoring\n"),
+ pathname);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static const char *
+parse_gnu_debuglink (struct dwarf_section * section, void * data)
+{
+ const char * name;
+ unsigned int crc_offset;
+ unsigned long * crc32 = (unsigned long *) data;
+
+ /* The name is first.
+ The CRC value is stored after the filename, aligned up to 4 bytes. */
+ name = (const char *) section->start;
+
+ crc_offset = strnlen (name, section->size) + 1;
+ crc_offset = (crc_offset + 3) & ~3;
+ if (crc_offset + 4 > section->size)
+ return NULL;
+
+ * crc32 = byte_get (section->start + crc_offset, 4);
+ return name;
+}
+
+static bfd_boolean
+check_gnu_debugaltlink (const char * filename, void * data ATTRIBUTE_UNUSED)
+{
+ void * sep_data = open_debug_file (filename);
+
+ if (sep_data == NULL)
+ return FALSE;
+
+ /* FIXME: We should now extract the build-id in the separate file
+ and check it... */
+
+ return TRUE;
+}
+
+typedef struct build_id_data
+{
+ bfd_size_type len;
+ const unsigned char * data;
+} Build_id_data;
+
+static const char *
+parse_gnu_debugaltlink (struct dwarf_section * section, void * data)
+{
+ const char * name;
+ bfd_size_type namelen;
+ bfd_size_type id_len;
+ Build_id_data * build_id_data;
+
+ /* The name is first.
+ The build-id follows immediately, with no padding, up to the section's end. */
+
+ name = (const char *) section->start;
+ namelen = strnlen (name, section->size) + 1;
+ if (namelen >= section->size)
+ return NULL;
+
+ id_len = section->size - namelen;
+ if (id_len < 0x14)
+ return NULL;
+
+ build_id_data = calloc (1, sizeof * build_id_data);
+ if (build_id_data == NULL)
+ return NULL;
+
+ build_id_data->len = id_len;
+ build_id_data->data = section->start + namelen;
+
+ * (Build_id_data **) data = build_id_data;
+
+ return name;
+}
+
+static void *
+load_separate_debug_info (const char * main_filename,
+ struct dwarf_section * xlink,
+ parse_func_type parse_func,
+ check_func_type check_func,
+ void * func_data)
+{
+ const char * separate_filename;
+ char * debugfile;
+ char * canon_dir;
+ size_t canon_dirlen;
+ size_t dirlen;
+
+ if ((separate_filename = parse_func (xlink, func_data)) == NULL)
+ {
+ warn (_("Corrupt debuglink section: %s\n"),
+ xlink->name ? xlink->name : xlink->uncompressed_name);
+ return FALSE;
+ }
+
+ /* Attempt to locate the separate file.
+ This should duplicate the logic in bfd/opncls.c:find_separate_debug_file(). */
+
+ canon_dir = lrealpath (main_filename);
+
+ for (canon_dirlen = strlen (canon_dir); canon_dirlen > 0; canon_dirlen--)
+ if (IS_DIR_SEPARATOR (canon_dir[canon_dirlen - 1]))
+ break;
+ canon_dir[canon_dirlen] = '\0';
+
+#ifndef DEBUGDIR
+#define DEBUGDIR "/lib/debug"
+#endif
+#ifndef EXTRA_DEBUG_ROOT1
+#define EXTRA_DEBUG_ROOT1 "/usr/lib/debug"
+#endif
+#ifndef EXTRA_DEBUG_ROOT2
+#define EXTRA_DEBUG_ROOT2 "/usr/lib/debug/usr"
+#endif
+
+ debugfile = (char *) malloc (strlen (DEBUGDIR) + 1
+ + canon_dirlen
+ + strlen (".debug/")
+#ifdef EXTRA_DEBUG_ROOT1
+ + strlen (EXTRA_DEBUG_ROOT1)
+#endif
+#ifdef EXTRA_DEBUG_ROOT2
+ + strlen (EXTRA_DEBUG_ROOT2)
+#endif
+ + strlen (separate_filename)
+ + 1);
+ if (debugfile == NULL)
+ {
+ warn (_("Out of memory"));
+ return NULL;
+ }
+
+ /* First try in the current directory. */
+ sprintf (debugfile, "%s", separate_filename);
+ if (check_func (debugfile, func_data))
+ goto found;
+
+ /* Then try in a subdirectory called .debug. */
+ sprintf (debugfile, ".debug/%s", separate_filename);
+ if (check_func (debugfile, func_data))
+ goto found;
+
+ /* Then try in the same directory as the original file. */
+ sprintf (debugfile, "%s%s", canon_dir, separate_filename);
+ if (check_func (debugfile, func_data))
+ goto found;
+
+ /* And the .debug subdirectory of that directory. */
+ sprintf (debugfile, "%s.debug/%s", canon_dir, separate_filename);
+ if (check_func (debugfile, func_data))
+ goto found;
+
+#ifdef EXTRA_DEBUG_ROOT1
+ /* Try the first extra debug file root. */
+ sprintf (debugfile, "%s/%s", EXTRA_DEBUG_ROOT1, separate_filename);
+ if (check_func (debugfile, func_data))
+ goto found;
+#endif
+
+#ifdef EXTRA_DEBUG_ROOT2
+ /* Try the second extra debug file root. */
+ sprintf (debugfile, "%s/%s", EXTRA_DEBUG_ROOT2, separate_filename);
+ if (check_func (debugfile, func_data))
+ goto found;
+#endif
+
+ /* Then try in the global debugfile directory. */
+ strcpy (debugfile, DEBUGDIR);
+ dirlen = strlen (DEBUGDIR) - 1;
+ if (dirlen > 0 && DEBUGDIR[dirlen] != '/')
+ strcat (debugfile, "/");
+ strcat (debugfile, (const char *) separate_filename);
+
+ if (check_func (debugfile, func_data))
+ goto found;
+
+ /* Failed to find the file. */
+ warn (_("could not find separate debug file '%s'\n"), separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+
+#ifdef EXTRA_DEBUG_ROOT2
+ sprintf (debugfile, "%s/%s", EXTRA_DEBUG_ROOT2, separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+#endif
+
+#ifdef EXTRA_DEBUG_ROOT1
+ sprintf (debugfile, "%s/%s", EXTRA_DEBUG_ROOT1, separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+#endif
+
+ sprintf (debugfile, "%s.debug/%s", canon_dir, separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+
+ sprintf (debugfile, "%s%s", canon_dir, separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+
+ sprintf (debugfile, ".debug/%s", separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+
+ sprintf (debugfile, "%s", separate_filename);
+ warn (_("tried: %s\n"), debugfile);
+
+ free (canon_dir);
+ free (debugfile);
+ return NULL;
+
+ found:
+ free (canon_dir);
+
+ /* Now open the file.... */
+ if ((separate_debug_file = open_debug_file (debugfile)) == NULL)
+ {
+ warn (_("failed to open separate debug file: %s\n"), debugfile);
+ free (debugfile);
+ return FALSE;
+ }
+
+ /* FIXME: We do not check to see if there are any other separate debug info
+ files that would also match. */
+
+ printf (_("%s: Found separate debug info file: %s\n\n"), main_filename, debugfile);
+ separate_debug_filename = debugfile;
+
+ /* Do not free debugfile - it might be referenced inside
+ the structure returned by open_debug_file(). */
+ return separate_debug_file;
+}
+
+/* Attempt to load a separate dwarf object file. */
+
+static void *
+load_dwo_file (const char * main_filename)
+{
+ char * filename;
+
+ /* FIXME: Skip adding / if dwo_dir ends in /. */
+ filename = concat (dwo_dir, "/", dwo_name, NULL);
+ if (filename == NULL)
+ {
+ warn (_("Out of memory allocating dwo filename\n"));
+ return NULL;
+ }
+
+ if ((separate_debug_file = open_debug_file (filename)) == NULL)
+ {
+ warn (_("Unable to load dwo file: %s\n"), filename);
+ free (filename);
+ return NULL;
+ }
+
+ /* FIXME: We should check the dwo_id. */
+
+ printf (_("%s: Found separate debug object file: %s\n\n"), main_filename, filename);
+ separate_debug_filename = filename;
+ return separate_debug_file;
+}
+
+/* Load a separate debug info file, if it exists.
+ Returns the data pointer that is the result of calling open_debug_file
+ on the separate debug info file, or NULL if there were problems or there
+ is no such file. */
+
+void *
+load_separate_debug_file (void * file, const char * filename)
+{
+ /* Skip this operation if we are not interested in debug links. */
+ if (! do_follow_links && ! do_debug_links)
+ return NULL;
+
+ /* See if there is a dwo link. */
+ if (load_debug_section (str, file)
+ && load_debug_section (abbrev, file)
+ && load_debug_section (info, file))
+ {
+ dwo_name = dwo_dir = NULL;
+ dwo_id = NULL;
+ dwo_id_len = 0;
+
+ if (process_debug_info (& debug_displays[info].section, file, abbrev, TRUE, FALSE))
+ {
+ if (dwo_name != NULL)
+ {
+ if (do_debug_links)
+ {
+ printf (_("The %s section contains a link to a dwo file:\n"),
+ debug_displays [info].section.uncompressed_name);
+ printf (_(" Name: %s\n"), dwo_name);
+ printf (_(" Directory: %s\n"), dwo_dir ? dwo_dir : _("<not-found>"));
+ if (dwo_id != NULL)
+ display_data (printf (_(" ID: ")), dwo_id, dwo_id_len);
+ else
+ printf (_(" ID: <unknown>\n"));
+ printf ("\n\n");
+ }
+
+ /* FIXME: We do not check to see if there are any more dwo links in the file... */
+ if (do_follow_links)
+ return load_dwo_file (filename);
+ }
+ }
+ }
+
+ if (! do_follow_links)
+ /* The other debug links will be displayed by display_debug_links()
+ so we do not need to do any further processing here. */
+ return NULL;
+
+ /* FIXME: We do not check for the presence of both link sections in the same file. */
+ /* FIXME: We do not check the separate debug info file to see if it too contains debuglinks. */
+ /* FIXME: We do not check for the presence of multiple, same-name debuglink sections. */
+ /* FIXME: We do not check for the presence of a dwo link as well as a debuglink. */
+
+ if (load_debug_section (gnu_debugaltlink, file))
+ {
+ Build_id_data * build_id_data;
+
+ return load_separate_debug_info (filename,
+ & debug_displays[gnu_debugaltlink].section,
+ parse_gnu_debugaltlink,
+ check_gnu_debugaltlink,
+ & build_id_data);
+ }
+
+ if (load_debug_section (gnu_debuglink, file))
+ {
+ unsigned long crc32;
+
+ return load_separate_debug_info (filename,
+ & debug_displays[gnu_debuglink].section,
+ parse_gnu_debuglink,
+ check_gnu_debuglink,
+ & crc32);
+ }
+
+ do_follow_links = 0;
+ return NULL;
+}
+