diff options
Diffstat (limited to 'binutils/readelf.c')
| -rw-r--r-- | binutils/readelf.c | 684 |
1 files changed, 355 insertions, 329 deletions
diff --git a/binutils/readelf.c b/binutils/readelf.c index 87c8119..ce739e6 100644 --- a/binutils/readelf.c +++ b/binutils/readelf.c @@ -214,6 +214,7 @@ static struct group ** section_headers_groups; #define DISASS_DUMP (1 << 1) /* The -i command line switch. */ #define DEBUG_DUMP (1 << 2) /* The -w command line switch. */ #define STRING_DUMP (1 << 3) /* The -p command line switch. */ +#define RELOC_DUMP (1 << 4) /* The -R command line switch. */ typedef unsigned char dump_type; @@ -2844,11 +2845,12 @@ static struct option options[] = {"unwind", no_argument, 0, 'u'}, {"archive-index", no_argument, 0, 'c'}, {"hex-dump", required_argument, 0, 'x'}, - {"debug-dump", optional_argument, 0, OPTION_DEBUG_DUMP}, + {"relocated-dump", required_argument, 0, 'R'}, {"string-dump", required_argument, 0, 'p'}, #ifdef SUPPORT_DISASSEMBLY {"instruction-dump", required_argument, 0, 'i'}, #endif + {"debug-dump", optional_argument, 0, OPTION_DEBUG_DUMP}, {"version", no_argument, 0, 'v'}, {"wide", no_argument, 0, 'W'}, @@ -2885,6 +2887,8 @@ usage (FILE * stream) Dump the contents of section <number|name> as bytes\n\ -p --string-dump=<number|name>\n\ Dump the contents of section <number|name> as strings\n\ + -R --relocated-dump=<number|name>\n\ + Dump the contents of section <number|name> as relocated bytes\n\ -w[lLiaprmfFsoR] or\n\ --debug-dump[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=str,=loc,=Ranges]\n\ Display the contents of DWARF2 debug sections\n")); @@ -2961,6 +2965,22 @@ request_dump_byname (const char * section, dump_type type) dump_sects_byname = new_request; } +static inline void +request_dump (dump_type type) +{ + int section; + char * cp; + + do_dump++; + section = strtoul (optarg, & cp, 0); + + if (! *cp && section >= 0) + request_dump_bynumber (section, type); + else + request_dump_byname (optarg, type); +} + + static void parse_args (int argc, char ** argv) { @@ -2970,11 +2990,8 @@ parse_args (int argc, char ** argv) usage (stderr); while ((c = getopt_long - (argc, argv, "ADHINSVWacdeghi:lnp:rstuvw::x:", options, NULL)) != EOF) + (argc, argv, "ADHINR:SVWacdeghi:lnp:rstuvw::x:", options, NULL)) != EOF) { - char * cp; - int section; - switch (c) { case 0: @@ -3048,20 +3065,13 @@ parse_args (int argc, char ** argv) do_archive_index++; break; case 'x': - do_dump++; - section = strtoul (optarg, & cp, 0); - if (! *cp && section >= 0) - request_dump_bynumber (section, HEX_DUMP); - else - request_dump_byname (optarg, HEX_DUMP); + request_dump (HEX_DUMP); break; case 'p': - do_dump++; - section = strtoul (optarg, & cp, 0); - if (! *cp && section >= 0) - request_dump_bynumber (section, STRING_DUMP); - else - request_dump_byname (optarg, STRING_DUMP); + request_dump (STRING_DUMP); + break; + case 'R': + request_dump (RELOC_DUMP); break; case 'w': do_dump++; @@ -3088,12 +3098,8 @@ parse_args (int argc, char ** argv) break; #ifdef SUPPORT_DISASSEMBLY case 'i': - do_dump++; - section = strtoul (optarg, & cp, 0); - if (! *cp && section >= 0) - request_dump_bynumber (section, DISASS_DUMP); - else - request_dump_byname (optarg, DISASS_DUMP); + request_dump (DISASS_DUMP); + break; #endif case 'v': print_version (program_name); @@ -7759,190 +7765,57 @@ process_syminfo (FILE * file ATTRIBUTE_UNUSED) return 1; } -#ifdef SUPPORT_DISASSEMBLY -static int -disassemble_section (Elf_Internal_Shdr * section, FILE * file) -{ - printf (_("\nAssembly dump of section %s\n"), - SECTION_NAME (section)); - - /* XXX -- to be done --- XXX */ - - return 1; -} -#endif - -static int -dump_section_as_strings (Elf_Internal_Shdr * section, FILE * file) -{ - Elf_Internal_Shdr * relsec; - bfd_size_type num_bytes; - bfd_vma addr; - char * data; - char * end; - char * start; - char * name = SECTION_NAME (section); - bfd_boolean some_strings_shown; - - num_bytes = section->sh_size; - - if (num_bytes == 0 || section->sh_type == SHT_NOBITS) - { - printf (_("\nSection '%s' has no data to dump.\n"), name); - return 0; - } - - addr = section->sh_addr; - - start = get_data (NULL, file, section->sh_offset, 1, num_bytes, - _("section data")); - if (!start) - return 0; - - printf (_("\nString dump of section '%s':\n"), name); - - /* If the section being dumped has relocations against it the user might - be expecting these relocations to have been applied. Check for this - case and issue a warning message in order to avoid confusion. - FIXME: Maybe we ought to have an option that dumps a section with - relocs applied ? */ - for (relsec = section_headers; - relsec < section_headers + elf_header.e_shnum; - ++relsec) - { - if ((relsec->sh_type != SHT_RELA && relsec->sh_type != SHT_REL) - || relsec->sh_info >= elf_header.e_shnum - || section_headers + relsec->sh_info != section - || relsec->sh_size == 0 - || relsec->sh_link >= elf_header.e_shnum) - continue; - - printf (_(" Note: This section has relocations against it, but these have NOT been applied to this dump.\n")); - break; - } - - data = start; - end = start + num_bytes; - some_strings_shown = FALSE; - - while (data < end) - { - while (!ISPRINT (* data)) - if (++ data >= end) - break; - - if (data < end) - { -#ifndef __MSVCRT__ - printf (" [%6tx] %s\n", data - start, data); -#else - printf (" [%6Ix] %s\n", (size_t) (data - start), data); -#endif - data += strlen (data); - some_strings_shown = TRUE; - } - } - - if (! some_strings_shown) - printf (_(" No strings found in this section.")); - - free (start); - - putchar ('\n'); - return 1; -} - +/* Check to see if the given reloc needs to be handled in a target specific + manner. If so then process the reloc and return TRUE otherwise return + FALSE. */ -static int -dump_section_as_bytes (Elf_Internal_Shdr * section, FILE * file) +static bfd_boolean +target_specific_reloc_handling (Elf_Internal_Rela * reloc, + unsigned char * start, + Elf_Internal_Sym * symtab) { - Elf_Internal_Shdr * relsec; - bfd_size_type bytes; - bfd_vma addr; - unsigned char * data; - unsigned char * start; - - bytes = section->sh_size; - - if (bytes == 0 || section->sh_type == SHT_NOBITS) - { - printf (_("\nSection '%s' has no data to dump.\n"), - SECTION_NAME (section)); - return 0; - } - else - printf (_("\nHex dump of section '%s':\n"), SECTION_NAME (section)); - - addr = section->sh_addr; - - start = get_data (NULL, file, section->sh_offset, 1, bytes, - _("section data")); - if (!start) - return 0; - - /* If the section being dumped has relocations against it the user might - be expecting these relocations to have been applied. Check for this - case and issue a warning message in order to avoid confusion. - FIXME: Maybe we ought to have an option that dumps a section with - relocs applied ? */ - for (relsec = section_headers; - relsec < section_headers + elf_header.e_shnum; - ++relsec) - { - if ((relsec->sh_type != SHT_RELA && relsec->sh_type != SHT_REL) - || relsec->sh_info >= elf_header.e_shnum - || section_headers + relsec->sh_info != section - || relsec->sh_size == 0 - || relsec->sh_link >= elf_header.e_shnum) - continue; - - printf (_(" NOTE: This section has relocations against it, but these have NOT been applied to this dump.\n")); - break; - } - - data = start; + unsigned int reloc_type = get_reloc_type (reloc->r_info); - while (bytes) + switch (elf_header.e_machine) { - int j; - int k; - int lbytes; - - lbytes = (bytes > 16 ? 16 : bytes); - - printf (" 0x%8.8lx ", (unsigned long) addr); - - for (j = 0; j < 16; j++) - { - if (j < lbytes) - printf ("%2.2x", data[j]); - else - printf (" "); + case EM_MN10300: + case EM_CYGNUS_MN10300: + { + static Elf_Internal_Sym * saved_sym = NULL; - if ((j & 3) == 3) - printf (" "); - } + switch (reloc_type) + { + case 34: /* R_MN10300_ALIGN */ + return TRUE; + case 33: /* R_MN10300_SYM_DIFF */ + saved_sym = symtab + get_reloc_symindex (reloc->r_info); + return TRUE; + case 1: /* R_MN10300_32 */ + case 2: /* R_MN10300_16 */ + if (saved_sym != NULL) + { + bfd_vma value; - for (j = 0; j < lbytes; j++) - { - k = data[j]; - if (k >= ' ' && k < 0x7f) - printf ("%c", k); - else - printf ("."); - } + value = reloc->r_addend + + (symtab[get_reloc_symindex (reloc->r_info)].st_value + - saved_sym->st_value); - putchar ('\n'); + byte_put (start + reloc->r_offset, value, reloc_type == 1 ? 4 : 2); - data += lbytes; - addr += lbytes; - bytes -= lbytes; + saved_sym = NULL; + return TRUE; + } + break; + default: + if (saved_sym != NULL) + error (_("Unhandled MN10300 reloc type found after SYM_DIFF reloc")); + break; + } + break; + } } - free (start); - - putchar ('\n'); - return 1; + return FALSE; } /* Returns TRUE iff RELOC_TYPE is a 32-bit absolute RELA relocation used in @@ -8130,8 +8003,8 @@ is_32bit_pcrel_reloc (unsigned int reloc_type) /* Do not abort or issue an error message here. Not all targets use pc-relative 32-bit relocs in their DWARF debug information and we have already tested for target coverage in is_32bit_abs_reloc. A - more helpful warning message will be generated by - debug_apply_relocations anyway, so just return. */ + more helpful warning message will be generated by apply_relocations + anyway, so just return. */ return FALSE; } } @@ -8265,133 +8138,15 @@ is_none_reloc (unsigned int reloc_type) return FALSE; } -/* Uncompresses a section that was compressed using zlib, in place. - This is a copy of bfd_uncompress_section_contents, in bfd/compress.c */ - -static int -uncompress_section_contents (unsigned char ** buffer, dwarf_size_type * size) -{ -#ifndef HAVE_ZLIB_H - /* These are just to quiet gcc. */ - buffer = 0; - size = 0; - return FALSE; -#else - dwarf_size_type compressed_size = *size; - unsigned char * compressed_buffer = *buffer; - dwarf_size_type uncompressed_size; - unsigned char * uncompressed_buffer; - z_stream strm; - int rc; - dwarf_size_type header_size = 12; - - /* Read the zlib header. In this case, it should be "ZLIB" followed - by the uncompressed section size, 8 bytes in big-endian order. */ - if (compressed_size < header_size - || ! streq ((char *) compressed_buffer, "ZLIB")) - return 0; - - uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8; - uncompressed_size += compressed_buffer[11]; - - /* It is possible the section consists of several compressed - buffers concatenated together, so we uncompress in a loop. */ - strm.zalloc = NULL; - strm.zfree = NULL; - strm.opaque = NULL; - strm.avail_in = compressed_size - header_size; - strm.next_in = (Bytef *) compressed_buffer + header_size; - strm.avail_out = uncompressed_size; - uncompressed_buffer = xmalloc (uncompressed_size); - - rc = inflateInit (& strm); - while (strm.avail_in > 0) - { - if (rc != Z_OK) - goto fail; - strm.next_out = ((Bytef *) uncompressed_buffer - + (uncompressed_size - strm.avail_out)); - rc = inflate (&strm, Z_FINISH); - if (rc != Z_STREAM_END) - goto fail; - rc = inflateReset (& strm); - } - rc = inflateEnd (& strm); - if (rc != Z_OK - || strm.avail_out != 0) - goto fail; - - free (compressed_buffer); - *buffer = uncompressed_buffer; - *size = uncompressed_size; - return 1; - - fail: - free (uncompressed_buffer); - return 0; -#endif /* HAVE_ZLIB_H */ -} - -/* Check to see if the given reloc needs to be handled in a target specific - manner. If so then process the reloc and return TRUE otherwise return - FALSE. */ - -static bfd_boolean -target_specific_reloc_handling (Elf_Internal_Rela * reloc, - unsigned char * start, - Elf_Internal_Sym * symtab) -{ - unsigned int reloc_type = get_reloc_type (reloc->r_info); - - switch (elf_header.e_machine) - { - case EM_MN10300: - case EM_CYGNUS_MN10300: - { - static Elf_Internal_Sym * saved_sym = NULL; - - switch (reloc_type) - { - case 34: /* R_MN10300_ALIGN */ - return TRUE; - case 33: /* R_MN10300_SYM_DIFF */ - saved_sym = symtab + get_reloc_symindex (reloc->r_info); - return TRUE; - case 1: /* R_MN10300_32 */ - if (saved_sym != NULL) - { - bfd_vma value; - - value = reloc->r_addend - + (symtab[get_reloc_symindex (reloc->r_info)].st_value - - saved_sym->st_value); - - byte_put (start + reloc->r_offset, value, 4); - - saved_sym = NULL; - return TRUE; - } - break; - } - break; - } - } - - return FALSE; -} - -/* Apply relocations to a debug section. */ +/* Apply relocations to a section. + Note: So far support has been added only for those relocations + which can be found in debug sections. + FIXME: Add support for more relocations ? */ static void -debug_apply_relocations (void * file, - Elf_Internal_Shdr * section, - unsigned char * start) +apply_relocations (void * file, + Elf_Internal_Shdr * section, + unsigned char * start) { Elf_Internal_Shdr * relsec; unsigned char * end = start + section->sh_size; @@ -8399,7 +8154,7 @@ debug_apply_relocations (void * file, if (elf_header.e_type != ET_REL) return; - /* Find the reloc section associated with the debug section. */ + /* Find the reloc section associated with the section. */ for (relsec = section_headers; relsec < section_headers + elf_header.e_shnum; ++relsec) @@ -8524,6 +8279,274 @@ debug_apply_relocations (void * file, } } +#ifdef SUPPORT_DISASSEMBLY +static int +disassemble_section (Elf_Internal_Shdr * section, FILE * file) +{ + printf (_("\nAssembly dump of section %s\n"), + SECTION_NAME (section)); + + /* XXX -- to be done --- XXX */ + + return 1; +} +#endif + +/* Reads in the contents of SECTION from FILE, returning a pointer + to a malloc'ed buffer or NULL if something went wrong. */ + +static char * +get_section_contents (Elf_Internal_Shdr * section, FILE * file) +{ + bfd_size_type num_bytes; + + num_bytes = section->sh_size; + + if (num_bytes == 0 || section->sh_type == SHT_NOBITS) + { + printf (_("\nSection '%s' has no data to dump.\n"), + SECTION_NAME (section)); + return NULL; + } + + return get_data (NULL, file, section->sh_offset, 1, num_bytes, + _("section contents")); +} + + +static void +dump_section_as_strings (Elf_Internal_Shdr * section, FILE * file) +{ + Elf_Internal_Shdr * relsec; + bfd_size_type num_bytes; + bfd_vma addr; + char * data; + char * end; + char * start; + char * name = SECTION_NAME (section); + bfd_boolean some_strings_shown; + + start = get_section_contents (section, file); + if (start == NULL) + return; + + printf (_("\nString dump of section '%s':\n"), name); + + /* If the section being dumped has relocations against it the user might + be expecting these relocations to have been applied. Check for this + case and issue a warning message in order to avoid confusion. + FIXME: Maybe we ought to have an option that dumps a section with + relocs applied ? */ + for (relsec = section_headers; + relsec < section_headers + elf_header.e_shnum; + ++relsec) + { + if ((relsec->sh_type != SHT_RELA && relsec->sh_type != SHT_REL) + || relsec->sh_info >= elf_header.e_shnum + || section_headers + relsec->sh_info != section + || relsec->sh_size == 0 + || relsec->sh_link >= elf_header.e_shnum) + continue; + + printf (_(" Note: This section has relocations against it, but these have NOT been applied to this dump.\n")); + break; + } + + num_bytes = section->sh_size; + addr = section->sh_addr; + data = start; + end = start + num_bytes; + some_strings_shown = FALSE; + + while (data < end) + { + while (!ISPRINT (* data)) + if (++ data >= end) + break; + + if (data < end) + { +#ifndef __MSVCRT__ + printf (" [%6tx] %s\n", data - start, data); +#else + printf (" [%6Ix] %s\n", (size_t) (data - start), data); +#endif + data += strlen (data); + some_strings_shown = TRUE; + } + } + + if (! some_strings_shown) + printf (_(" No strings found in this section.")); + + free (start); + + putchar ('\n'); +} + +static void +dump_section_as_bytes (Elf_Internal_Shdr * section, + FILE * file, + bfd_boolean relocate) +{ + Elf_Internal_Shdr * relsec; + bfd_size_type bytes; + bfd_vma addr; + unsigned char * data; + unsigned char * start; + + start = (unsigned char *) get_section_contents (section, file); + if (start == NULL) + return; + + printf (_("\nHex dump of section '%s':\n"), SECTION_NAME (section)); + + if (relocate) + { + apply_relocations (file, section, start); + } + else + { + /* If the section being dumped has relocations against it the user might + be expecting these relocations to have been applied. Check for this + case and issue a warning message in order to avoid confusion. + FIXME: Maybe we ought to have an option that dumps a section with + relocs applied ? */ + for (relsec = section_headers; + relsec < section_headers + elf_header.e_shnum; + ++relsec) + { + if ((relsec->sh_type != SHT_RELA && relsec->sh_type != SHT_REL) + || relsec->sh_info >= elf_header.e_shnum + || section_headers + relsec->sh_info != section + || relsec->sh_size == 0 + || relsec->sh_link >= elf_header.e_shnum) + continue; + + printf (_(" NOTE: This section has relocations against it, but these have NOT been applied to this dump.\n")); + break; + } + } + + addr = section->sh_addr; + bytes = section->sh_size; + data = start; + + while (bytes) + { + int j; + int k; + int lbytes; + + lbytes = (bytes > 16 ? 16 : bytes); + + printf (" 0x%8.8lx ", (unsigned long) addr); + + for (j = 0; j < 16; j++) + { + if (j < lbytes) + printf ("%2.2x", data[j]); + else + printf (" "); + + if ((j & 3) == 3) + printf (" "); + } + + for (j = 0; j < lbytes; j++) + { + k = data[j]; + if (k >= ' ' && k < 0x7f) + printf ("%c", k); + else + printf ("."); + } + + putchar ('\n'); + + data += lbytes; + addr += lbytes; + bytes -= lbytes; + } + + free (start); + + putchar ('\n'); +} + +/* Uncompresses a section that was compressed using zlib, in place. + This is a copy of bfd_uncompress_section_contents, in bfd/compress.c */ + +static int +uncompress_section_contents (unsigned char ** buffer, dwarf_size_type * size) +{ +#ifndef HAVE_ZLIB_H + /* These are just to quiet gcc. */ + buffer = 0; + size = 0; + return FALSE; +#else + dwarf_size_type compressed_size = *size; + unsigned char * compressed_buffer = *buffer; + dwarf_size_type uncompressed_size; + unsigned char * uncompressed_buffer; + z_stream strm; + int rc; + dwarf_size_type header_size = 12; + + /* Read the zlib header. In this case, it should be "ZLIB" followed + by the uncompressed section size, 8 bytes in big-endian order. */ + if (compressed_size < header_size + || ! streq ((char *) compressed_buffer, "ZLIB")) + return 0; + + uncompressed_size = compressed_buffer[4]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[5]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[6]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[7]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[8]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[9]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[10]; uncompressed_size <<= 8; + uncompressed_size += compressed_buffer[11]; + + /* It is possible the section consists of several compressed + buffers concatenated together, so we uncompress in a loop. */ + strm.zalloc = NULL; + strm.zfree = NULL; + strm.opaque = NULL; + strm.avail_in = compressed_size - header_size; + strm.next_in = (Bytef *) compressed_buffer + header_size; + strm.avail_out = uncompressed_size; + uncompressed_buffer = xmalloc (uncompressed_size); + + rc = inflateInit (& strm); + while (strm.avail_in > 0) + { + if (rc != Z_OK) + goto fail; + strm.next_out = ((Bytef *) uncompressed_buffer + + (uncompressed_size - strm.avail_out)); + rc = inflate (&strm, Z_FINISH); + if (rc != Z_STREAM_END) + goto fail; + rc = inflateReset (& strm); + } + rc = inflateEnd (& strm); + if (rc != Z_OK + || strm.avail_out != 0) + goto fail; + + free (compressed_buffer); + *buffer = uncompressed_buffer; + *size = uncompressed_size; + return 1; + + fail: + free (uncompressed_buffer); + return 0; +#endif /* HAVE_ZLIB_H */ +} + static int load_specific_debug_section (enum dwarf_section_display_enum debug, Elf_Internal_Shdr * sec, void * file) @@ -8551,7 +8574,7 @@ load_specific_debug_section (enum dwarf_section_display_enum debug, return 0; if (debug_displays [debug].relocate) - debug_apply_relocations (file, sec, section->start); + apply_relocations (file, sec, section->start); return 1; } @@ -8700,13 +8723,16 @@ process_section_contents (FILE * file) disassemble_section (section, file); #endif if (dump_sects[i] & HEX_DUMP) - dump_section_as_bytes (section, file); + dump_section_as_bytes (section, file, FALSE); - if (dump_sects[i] & DEBUG_DUMP) - display_debug_section (section, file); + if (dump_sects[i] & RELOC_DUMP) + dump_section_as_bytes (section, file, TRUE); if (dump_sects[i] & STRING_DUMP) dump_section_as_strings (section, file); + + if (dump_sects[i] & DEBUG_DUMP) + display_debug_section (section, file); } /* Check to see if the user requested a |