/* Discard section not used at runtime from object files.
- Copyright (C) 2000-2012 Red Hat, Inc.
+ Copyright (C) 2000-2012, 2014 Red Hat, Inc.
This file is part of elfutils.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
Elf_Data debuglink_crc_data;
bool any_symtab_changes = false;
Elf_Data *shstrtab_data = NULL;
+ void *debuglink_buf = NULL;
/* Create the full name of the file. */
if (prefix != NULL)
goto fail_close;
}
+ if (shstrndx >= shnum)
+ goto illformed;
+
+#define elf_assert(test) do { if (!(test)) goto illformed; } while (0)
+
/* Storage for section information. We leave room for two more
entries since we unconditionally create a section header string
table. Maybe some weird tool created an ELF file without one.
{
/* This should always be true (i.e., there should not be any
holes in the numbering). */
- assert (elf_ndxscn (scn) == cnt);
+ elf_assert (elf_ndxscn (scn) == cnt);
shdr_info[cnt].scn = scn;
shdr_info[cnt].shdr.sh_name);
if (shdr_info[cnt].name == NULL)
{
+ illformed:
error (0, 0, gettext ("illformed file '%s'"), fname);
goto fail_close;
}
/* Remember the shdr.sh_link value. */
shdr_info[cnt].old_sh_link = shdr_info[cnt].shdr.sh_link;
+ if (shdr_info[cnt].old_sh_link >= shnum)
+ goto illformed;
/* Sections in files other than relocatable object files which
are not loaded can be freely moved by us. In relocatable
appropriate reference. */
if (unlikely (shdr_info[cnt].shdr.sh_type == SHT_SYMTAB_SHNDX))
{
- assert (shdr_info[shdr_info[cnt].shdr.sh_link].symtab_idx == 0);
+ elf_assert (shdr_info[shdr_info[cnt].shdr.sh_link].symtab_idx == 0);
shdr_info[shdr_info[cnt].shdr.sh_link].symtab_idx = cnt;
}
else if (unlikely (shdr_info[cnt].shdr.sh_type == SHT_GROUP))
for (inner = 1;
inner < shdr_info[cnt].data->d_size / sizeof (Elf32_Word);
++inner)
- shdr_info[grpref[inner]].group_idx = cnt;
+ {
+ if (grpref[inner] < shnum)
+ shdr_info[grpref[inner]].group_idx = cnt;
+ else
+ goto illformed;
+ }
if (inner == 1 || (inner == 2 && (grpref[0] & GRP_COMDAT) == 0))
/* If the section group contains only one element and this
}
else if (unlikely (shdr_info[cnt].shdr.sh_type == SHT_GNU_versym))
{
- assert (shdr_info[shdr_info[cnt].shdr.sh_link].version_idx == 0);
+ elf_assert (shdr_info[shdr_info[cnt].shdr.sh_link].version_idx == 0);
shdr_info[shdr_info[cnt].shdr.sh_link].version_idx = cnt;
}
discarded right away. */
if ((shdr_info[cnt].shdr.sh_flags & SHF_GROUP) != 0)
{
- assert (shdr_info[cnt].group_idx != 0);
+ elf_assert (shdr_info[cnt].group_idx != 0);
if (shdr_info[shdr_info[cnt].group_idx].idx == 0)
{
{
/* If a relocation section is marked as being removed make
sure the section it is relocating is removed, too. */
- if ((shdr_info[cnt].shdr.sh_type == SHT_REL
+ if (shdr_info[cnt].shdr.sh_type == SHT_REL
|| shdr_info[cnt].shdr.sh_type == SHT_RELA)
- && shdr_info[shdr_info[cnt].shdr.sh_info].idx != 0)
- shdr_info[cnt].idx = 1;
+ {
+ if (shdr_info[cnt].shdr.sh_info >= shnum)
+ goto illformed;
+ else if (shdr_info[shdr_info[cnt].shdr.sh_info].idx != 0)
+ shdr_info[cnt].idx = 1;
+ }
/* If a group section is marked as being removed make
sure all the sections it contains are being removed, too. */
if (shdr_info[cnt].symtab_idx != 0
&& shdr_info[shdr_info[cnt].symtab_idx].data == NULL)
{
- assert (shdr_info[cnt].shdr.sh_type == SHT_SYMTAB);
+ elf_assert (shdr_info[cnt].shdr.sh_type == SHT_SYMTAB);
shdr_info[shdr_info[cnt].symtab_idx].data
= elf_getdata (shdr_info[shdr_info[cnt].symtab_idx].scn,
else if (scnidx == SHN_XINDEX)
scnidx = xndx;
+ if (scnidx >= shnum)
+ goto illformed;
+
if (shdr_info[scnidx].idx == 0)
/* This symbol table has a real symbol in
a discarded section. So preserve the
}
/* Handle references through sh_info. */
- if (SH_INFO_LINK_P (&shdr_info[cnt].shdr)
- && shdr_info[shdr_info[cnt].shdr.sh_info].idx == 0)
+ if (SH_INFO_LINK_P (&shdr_info[cnt].shdr))
{
- shdr_info[shdr_info[cnt].shdr.sh_info].idx = 1;
- changes |= shdr_info[cnt].shdr.sh_info < cnt;
+ if (shdr_info[cnt].shdr.sh_info >= shnum)
+ goto illformed;
+ else if ( shdr_info[shdr_info[cnt].shdr.sh_info].idx == 0)
+ {
+ shdr_info[shdr_info[cnt].shdr.sh_info].idx = 1;
+ changes |= shdr_info[cnt].shdr.sh_info < cnt;
+ }
}
/* Mark the section as investigated. */
error (EXIT_FAILURE, 0, gettext ("while generating output file: %s"),
elf_errmsg (-1));
- assert (elf_ndxscn (shdr_info[cnt].newscn) == shdr_info[cnt].idx);
+ elf_assert (elf_ndxscn (shdr_info[cnt].newscn) == shdr_info[cnt].idx);
/* Add this name to the section header string table. */
shdr_info[cnt].se = ebl_strtabadd (shst, shdr_info[cnt].name, 0);
error (EXIT_FAILURE, 0,
gettext ("while create section header section: %s"),
elf_errmsg (-1));
- assert (elf_ndxscn (shdr_info[cnt].newscn) == shdr_info[cnt].idx);
+ elf_assert (elf_ndxscn (shdr_info[cnt].newscn) == shdr_info[cnt].idx);
shdr_info[cnt].data = elf_newdata (shdr_info[cnt].newscn);
if (shdr_info[cnt].data == NULL)
shdr_info[cnt].data->d_align = 4;
shdr_info[cnt].shdr.sh_size = shdr_info[cnt].data->d_size
= crc_offset + 4;
- shdr_info[cnt].data->d_buf = xcalloc (1, shdr_info[cnt].data->d_size);
+ debuglink_buf = xcalloc (1, shdr_info[cnt].data->d_size);
+ shdr_info[cnt].data->d_buf = debuglink_buf;
strcpy (shdr_info[cnt].data->d_buf, debug_basename);
error (EXIT_FAILURE, 0,
gettext ("while create section header section: %s"),
elf_errmsg (-1));
- assert (elf_ndxscn (shdr_info[cnt].newscn) == idx);
+ elf_assert (elf_ndxscn (shdr_info[cnt].newscn) == idx);
/* Finalize the string table and fill in the correct indices in the
section headers. */
shndxdata = elf_getdata (shdr_info[shdr_info[cnt].symtab_idx].scn,
NULL);
- assert ((versiondata->d_size / sizeof (Elf32_Word))
+ elf_assert ((versiondata->d_size / sizeof (Elf32_Word))
>= shdr_info[cnt].data->d_size / elsize);
}
if (shdr_info[cnt].version_idx != 0)
{
- assert (shdr_info[cnt].shdr.sh_type == SHT_DYNSYM);
+ elf_assert (shdr_info[cnt].shdr.sh_type == SHT_DYNSYM);
/* This section has associated version
information. We have to modify that
information, too. */
versiondata = elf_getdata (shdr_info[shdr_info[cnt].version_idx].scn,
NULL);
- assert ((versiondata->d_size / sizeof (GElf_Versym))
+ elf_assert ((versiondata->d_size / sizeof (GElf_Versym))
>= shdr_info[cnt].data->d_size / elsize);
}
sec = shdr_info[sym->st_shndx].idx;
else
{
- assert (shndxdata != NULL);
+ elf_assert (shndxdata != NULL);
sec = shdr_info[xshndx].idx;
}
nxshndx = sec;
}
- assert (sec < SHN_LORESERVE || shndxdata != NULL);
+ elf_assert (sec < SHN_LORESERVE || shndxdata != NULL);
if ((inner != destidx || nshndx != sym->st_shndx
|| (shndxdata != NULL && nxshndx != xshndx))
{
size_t sidx = (sym->st_shndx != SHN_XINDEX
? sym->st_shndx : xshndx);
- assert (GELF_ST_TYPE (sym->st_info) == STT_SECTION
- || (shdr_info[sidx].shdr.sh_type == SHT_GROUP
- && shdr_info[sidx].shdr.sh_info == inner));
+ elf_assert (GELF_ST_TYPE (sym->st_info) == STT_SECTION
+ || ((shdr_info[sidx].shdr.sh_type
+ == SHT_GROUP)
+ && (shdr_info[sidx].shdr.sh_info
+ == inner)));
}
}
{
GElf_Sym sym_mem;
GElf_Sym *sym = gelf_getsym (symd, inner, &sym_mem);
- assert (sym != NULL);
+ elf_assert (sym != NULL);
const char *name = elf_strptr (elf, strshndx,
sym->st_name);
- assert (name != NULL);
+ elf_assert (name != NULL);
size_t hidx = elf_hash (name) % nbucket;
if (bucket[hidx] == 0)
else
{
/* Alpha and S390 64-bit use 64-bit SHT_HASH entries. */
- assert (shdr_info[cnt].shdr.sh_entsize
- == sizeof (Elf64_Xword));
+ elf_assert (shdr_info[cnt].shdr.sh_entsize
+ == sizeof (Elf64_Xword));
Elf64_Xword *bucket = (Elf64_Xword *) hashd->d_buf;
{
GElf_Sym sym_mem;
GElf_Sym *sym = gelf_getsym (symd, inner, &sym_mem);
- assert (sym != NULL);
+ elf_assert (sym != NULL);
const char *name = elf_strptr (elf, strshndx,
sym->st_name);
- assert (name != NULL);
+ elf_assert (name != NULL);
size_t hidx = elf_hash (name) % nbucket;
if (bucket[hidx] == 0)
free (shdr_info[cnt].debug_data->d_buf);
}
+ /* Free data we allocated for the .gnu_debuglink section. */
+ free (debuglink_buf);
+
/* Free the memory. */
if ((shnum + 2) * sizeof (struct shdr_info) > MAX_STACK_ALLOC)
free (shdr_info);
projects / platform / upstream / elfutils.git / blobdiff