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PR binutils/12855
* readelf.c (process_version_sections): Handle binaries containing corrupt version information. (process_symbol_table): Stop processing a symbol's version information if it could not be read in. (get_data): Add comment describing the function. (process_section_headers): Set dynamic_strings_length to 0 if the dynamic strings could not be read in. (process_dynamic_section): Likewise. (process_section_groups): Stop processing the group information if the data could not be read in. (hppa_processs_unwind): Assert that there is only one string table in the file. (arm_process_unwind): Likewise. (ia64_process_unwind): Likewise. Set the size of the unwind auxillary information to 0 if the data could not be read. (load_specific_debug_section): Handle a failure to read in the section. (process_mips_specific): Stop display of the PLT GOT section if it could not be read in.
This commit is contained in:
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516ec24de2
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@ -1,3 +1,28 @@
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2011-06-08 Nick Clifton <nickc@redhat.com>
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PR binutils/12855
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* readelf.c (process_version_sections): Handle binaries containing
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corrupt version information.
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(process_symbol_table): Stop processing a symbol's version
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information if it could not be read in.
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(get_data): Add comment describing the function.
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(process_section_headers): Set dynamic_strings_length to 0 if the
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dynamic strings could not be read in.
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(process_dynamic_section): Likewise.
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(process_section_groups): Stop processing the group information if
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the data could not be read in.
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(hppa_processs_unwind): Assert that there is only one string table
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in the file.
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(arm_process_unwind): Likewise.
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(ia64_process_unwind): Likewise.
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Set the size of the unwind auxillary information to 0 if the data
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could not be read.
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(load_specific_debug_section): Handle a failure to read in the
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section.
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(process_mips_specific): Stop display of the PLT GOT section if it
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could not be read in.
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2011-06-08 Tristan Gingold <gingold@adacore.com>
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* makefile.vms (DEFS): Define OBJDUMP_PRIVATE_VECTORS.
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@ -286,6 +286,12 @@ print_mode;
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} \
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while (0)
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/* Retrieve NMEMB structures, each SIZE bytes long from FILE starting at OFFSET.
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Put the retrieved data into VAR, if it is not NULL. Otherwise allocate a buffer
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using malloc and fill that. In either case return the pointer to the start of
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the retrieved data or NULL if something went wrong. If something does go wrong
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emit an error message using REASON as part of the context. */
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static void *
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get_data (void * var, FILE * file, long offset, size_t size, size_t nmemb,
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const char * reason)
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@ -4548,7 +4554,7 @@ process_section_headers (FILE * file)
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dynamic_strings = (char *) get_data (NULL, file, section->sh_offset,
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1, section->sh_size,
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_("dynamic strings"));
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dynamic_strings_length = section->sh_size;
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dynamic_strings_length = dynamic_strings == NULL ? 0 : section->sh_size;
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}
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else if (section->sh_type == SHT_SYMTAB_SHNDX)
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{
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@ -5029,6 +5035,8 @@ process_section_groups (FILE * file)
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start = (unsigned char *) get_data (NULL, file, section->sh_offset,
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1, section->sh_size,
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_("section data"));
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if (start == NULL)
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continue;
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indices = start;
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size = (section->sh_size / section->sh_entsize) - 1;
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@ -5734,6 +5742,7 @@ ia64_process_unwind (FILE * file)
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aux.symtab = GET_ELF_SYMBOLS (file, sec);
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strsec = section_headers + sec->sh_link;
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assert (aux.strtab == NULL);
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aux.strtab = (char *) get_data (NULL, file, strsec->sh_offset,
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1, strsec->sh_size,
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_("string table"));
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@ -5816,11 +5825,11 @@ ia64_process_unwind (FILE * file)
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}
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else
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{
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aux.info_size = sec->sh_size;
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aux.info_addr = sec->sh_addr;
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aux.info = (unsigned char *) get_data (NULL, file, sec->sh_offset, 1,
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aux.info_size,
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sec->sh_size,
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_("unwind info"));
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aux.info_size = aux.info == NULL ? 0 : sec->sh_size;
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printf (_("\nUnwind section "));
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@ -6147,6 +6156,7 @@ hppa_process_unwind (FILE * file)
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aux.symtab = GET_ELF_SYMBOLS (file, sec);
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strsec = section_headers + sec->sh_link;
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assert (aux.strtab == NULL);
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aux.strtab = (char *) get_data (NULL, file, strsec->sh_offset,
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1, strsec->sh_size,
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_("string table"));
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@ -6273,7 +6283,6 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
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arm_sec->sec = sec;
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arm_sec->data = get_data (NULL, aux->file, sec->sh_offset, 1,
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sec->sh_size, _("unwind data"));
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arm_sec->rela = NULL;
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arm_sec->nrelas = 0;
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@ -7032,6 +7041,7 @@ arm_process_unwind (FILE *file)
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aux.symtab = GET_ELF_SYMBOLS (file, sec);
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strsec = section_headers + sec->sh_link;
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assert (aux.strtab == NULL);
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aux.strtab = get_data (NULL, file, strsec->sh_offset,
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1, strsec->sh_size, _("string table"));
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aux.strtab_size = aux.strtab != NULL ? strsec->sh_size : 0;
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@ -7541,7 +7551,7 @@ process_dynamic_section (FILE * file)
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dynamic_strings = (char *) get_data (NULL, file, offset, 1,
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str_tab_len,
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_("dynamic string table"));
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dynamic_strings_length = str_tab_len;
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dynamic_strings_length = dynamic_strings == NULL ? 0 : str_tab_len;
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break;
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}
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}
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@ -8079,9 +8089,9 @@ process_version_sections (FILE * file)
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edefs = (Elf_External_Verdef *)
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get_data (NULL, file, section->sh_offset, 1,section->sh_size,
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_("version definition section"));
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endbuf = (char *) edefs + section->sh_size;
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if (!edefs)
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break;
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endbuf = (char *) edefs + section->sh_size;
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for (idx = cnt = 0; cnt < section->sh_info; ++cnt)
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{
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@ -8198,9 +8208,9 @@ process_version_sections (FILE * file)
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section->sh_offset, 1,
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section->sh_size,
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_("version need section"));
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endbuf = (char *) eneed + section->sh_size;
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if (!eneed)
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break;
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endbuf = (char *) eneed + section->sh_size;
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for (idx = cnt = 0; cnt < section->sh_info; ++cnt)
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{
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@ -8416,8 +8426,9 @@ process_version_sections (FILE * file)
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Elf_External_Vernaux evna;
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unsigned long a_off;
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get_data (&evn, file, offset, sizeof (evn), 1,
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_("version need"));
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if (get_data (&evn, file, offset, sizeof (evn), 1,
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_("version need")) == NULL)
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break;
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ivn.vn_aux = BYTE_GET (evn.vn_aux);
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ivn.vn_next = BYTE_GET (evn.vn_next);
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@ -8426,11 +8437,17 @@ process_version_sections (FILE * file)
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do
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{
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get_data (&evna, file, a_off, sizeof (evna),
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1, _("version need aux (2)"));
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if (get_data (&evna, file, a_off, sizeof (evna),
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1, _("version need aux (2)")) == NULL)
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{
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ivna.vna_next = 0;
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ivna.vna_other = 0;
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}
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else
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{
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ivna.vna_next = BYTE_GET (evna.vna_next);
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ivna.vna_other = BYTE_GET (evna.vna_other);
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}
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a_off += ivna.vna_next;
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}
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@ -8471,11 +8488,17 @@ process_version_sections (FILE * file)
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do
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{
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get_data (&evd, file, offset, sizeof (evd), 1,
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_("version def"));
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if (get_data (&evd, file, offset, sizeof (evd), 1,
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_("version def")) == NULL)
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{
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ivd.vd_next = 0;
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ivd.vd_ndx = 0;
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}
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else
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{
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ivd.vd_next = BYTE_GET (evd.vd_next);
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ivd.vd_ndx = BYTE_GET (evd.vd_ndx);
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}
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offset += ivd.vd_next;
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}
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@ -8489,10 +8512,11 @@ process_version_sections (FILE * file)
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ivd.vd_aux = BYTE_GET (evd.vd_aux);
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get_data (&evda, file,
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if (get_data (&evda, file,
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offset - ivd.vd_next + ivd.vd_aux,
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sizeof (evda), 1,
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_("version def aux"));
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_("version def aux")) == NULL)
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break;
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ivda.vda_name = BYTE_GET (evda.vda_name);
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@ -9153,8 +9177,8 @@ process_symbol_table (FILE * file)
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print_symbol (25, psym->st_name < strtab_size
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? strtab + psym->st_name : _("<corrupt>"));
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if (section->sh_type == SHT_DYNSYM &&
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version_info[DT_VERSIONTAGIDX (DT_VERSYM)] != 0)
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if (section->sh_type == SHT_DYNSYM
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&& version_info[DT_VERSIONTAGIDX (DT_VERSYM)] != 0)
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{
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unsigned char data[2];
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unsigned short vers_data;
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@ -9166,8 +9190,9 @@ process_symbol_table (FILE * file)
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(file, version_info[DT_VERSIONTAGIDX (DT_VERSYM)],
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sizeof data + si * sizeof (vers_data));
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get_data (&data, file, offset + si * sizeof (vers_data),
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sizeof (data), 1, _("version data"));
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if (get_data (&data, file, offset + si * sizeof (vers_data),
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sizeof (data), 1, _("version data")) == NULL)
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break;
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vers_data = byte_get (data, 2);
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@ -9195,8 +9220,14 @@ process_symbol_table (FILE * file)
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{
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unsigned long vna_off;
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get_data (&evn, file, offset, sizeof (evn), 1,
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_("version need"));
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if (get_data (&evn, file, offset, sizeof (evn), 1,
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_("version need")) == NULL)
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{
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ivna.vna_next = 0;
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ivna.vna_other = 0;
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ivna.vna_name = 0;
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break;
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}
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ivn.vn_aux = BYTE_GET (evn.vn_aux);
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ivn.vn_next = BYTE_GET (evn.vn_next);
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@ -9207,13 +9238,20 @@ process_symbol_table (FILE * file)
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{
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Elf_External_Vernaux evna;
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get_data (&evna, file, vna_off,
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if (get_data (&evna, file, vna_off,
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sizeof (evna), 1,
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_("version need aux (3)"));
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_("version need aux (3)")) == NULL)
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{
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ivna.vna_next = 0;
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ivna.vna_other = 0;
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ivna.vna_name = 0;
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}
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else
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{
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ivna.vna_other = BYTE_GET (evna.vna_other);
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ivna.vna_next = BYTE_GET (evna.vna_next);
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ivna.vna_name = BYTE_GET (evna.vna_name);
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}
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vna_off += ivna.vna_next;
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}
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@ -9260,12 +9298,19 @@ process_symbol_table (FILE * file)
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{
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Elf_External_Verdef evd;
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get_data (&evd, file, off, sizeof (evd),
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1, _("version def"));
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if (get_data (&evd, file, off, sizeof (evd),
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1, _("version def")) == NULL)
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{
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ivd.vd_ndx = 0;
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ivd.vd_aux = 0;
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ivd.vd_next = 0;
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}
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else
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{
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ivd.vd_ndx = BYTE_GET (evd.vd_ndx);
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ivd.vd_aux = BYTE_GET (evd.vd_aux);
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ivd.vd_next = BYTE_GET (evd.vd_next);
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}
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off += ivd.vd_next;
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}
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@ -9275,8 +9320,9 @@ process_symbol_table (FILE * file)
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off -= ivd.vd_next;
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off += ivd.vd_aux;
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get_data (&evda, file, off, sizeof (evda),
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1, _("version def aux"));
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if (get_data (&evda, file, off, sizeof (evda),
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1, _("version def aux")) == NULL)
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break;
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ivda.vda_name = BYTE_GET (evda.vda_name);
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@ -10361,12 +10407,17 @@ load_specific_debug_section (enum dwarf_section_display_enum debug,
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snprintf (buf, sizeof (buf), _("%s section data"), section->name);
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section->address = sec->sh_addr;
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section->size = sec->sh_size;
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section->start = (unsigned char *) get_data (NULL, (FILE *) file,
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sec->sh_offset, 1,
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sec->sh_size, buf);
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if (section->start == NULL)
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section->size = 0;
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else
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{
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section->size = sec->sh_size;
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if (uncompress_section_contents (§ion->start, §ion->size))
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sec->sh_size = section->size;
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}
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if (section->start == NULL)
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return 0;
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@ -11934,6 +11985,9 @@ process_mips_specific (FILE * file)
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offset = offset_from_vma (file, pltgot, global_end - pltgot);
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data = (unsigned char *) get_data (NULL, file, offset,
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global_end - pltgot, 1, _("GOT"));
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if (data == NULL)
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return 0;
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printf (_("\nPrimary GOT:\n"));
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printf (_(" Canonical gp value: "));
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print_vma (pltgot + 0x7ff0, LONG_HEX);
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@ -12030,6 +12084,9 @@ process_mips_specific (FILE * file)
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offset = offset_from_vma (file, mips_pltgot, end - mips_pltgot);
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data = (unsigned char *) get_data (NULL, file, offset, end - mips_pltgot,
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1, _("PLT GOT"));
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if (data == NULL)
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return 0;
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printf (_("\nPLT GOT:\n\n"));
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printf (_(" Reserved entries:\n"));
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printf (_(" %*s %*s Purpose\n"),
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@ -12108,8 +12165,6 @@ process_gnu_liblist (FILE * file)
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strtab = (char *) get_data (NULL, file, string_sec->sh_offset, 1,
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string_sec->sh_size,
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_("liblist string table"));
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strtab_size = string_sec->sh_size;
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if (strtab == NULL
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|| section->sh_entsize != sizeof (Elf32_External_Lib))
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{
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@ -12117,6 +12172,7 @@ process_gnu_liblist (FILE * file)
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free (strtab);
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break;
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}
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strtab_size = string_sec->sh_size;
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printf (_("\nLibrary list section '%s' contains %lu entries:\n"),
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SECTION_NAME (section),
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