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PR binutils/12855

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* 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:
Nick Clifton 2011-06-08 15:59:07 +00:00
parent 516ec24de2
commit 592458412f
2 changed files with 131 additions and 50 deletions
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25
binutils/ChangeLog
View File

@ -1,3 +1,28 @@
2011-06-08 Nick Clifton <nickc@redhat.com>
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.
2011-06-08 Tristan Gingold <gingold@adacore.com>
* makefile.vms (DEFS): Define OBJDUMP_PRIVATE_VECTORS.

124
binutils/readelf.c
View File

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