/* ELF attributes support (based on ARM EABI attributes).
- Copyright 2005, 2006, 2007, 2009, 2010, 2012
- Free Software Foundation, Inc.
+ Copyright (C) 2005-2016 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
/* Return the size of a single attribute. */
static bfd_vma
-obj_attr_size (int tag, obj_attribute *attr)
+obj_attr_size (unsigned int tag, obj_attribute *attr)
{
bfd_vma size;
/* Write attribute ATTR to butter P, and return a pointer to the following
byte. */
static bfd_byte *
-write_obj_attribute (bfd_byte *p, int tag, obj_attribute *attr)
+write_obj_attribute (bfd_byte *p, unsigned int tag, obj_attribute *attr)
{
/* Suppress default entries. */
if (is_default_attr (attr))
attr = elf_known_obj_attributes (abfd)[vendor];
for (i = LEAST_KNOWN_OBJ_ATTRIBUTE; i < NUM_KNOWN_OBJ_ATTRIBUTES; i++)
{
- int tag = i;
+ unsigned int tag = i;
if (get_elf_backend_data (abfd)->obj_attrs_order)
tag = get_elf_backend_data (abfd)->obj_attrs_order (i);
p = write_obj_attribute (p, tag, &attr[tag]);
/* Allocate/find an object attribute. */
static obj_attribute *
-elf_new_obj_attr (bfd *abfd, int vendor, int tag)
+elf_new_obj_attr (bfd *abfd, int vendor, unsigned int tag)
{
obj_attribute *attr;
obj_attribute_list *list;
/* Return the value of an integer object attribute. */
int
-bfd_elf_get_obj_attr_int (bfd *abfd, int vendor, int tag)
+bfd_elf_get_obj_attr_int (bfd *abfd, int vendor, unsigned int tag)
{
obj_attribute_list *p;
/* Add an integer object attribute. */
void
-bfd_elf_add_obj_attr_int (bfd *abfd, int vendor, int tag, unsigned int i)
+bfd_elf_add_obj_attr_int (bfd *abfd, int vendor, unsigned int tag, unsigned int i)
{
obj_attribute *attr;
/* Add a string object attribute. */
void
-bfd_elf_add_obj_attr_string (bfd *abfd, int vendor, int tag, const char *s)
+bfd_elf_add_obj_attr_string (bfd *abfd, int vendor, unsigned int tag, const char *s)
{
obj_attribute *attr;
/* Add a int+string object attribute. */
void
-bfd_elf_add_obj_attr_int_string (bfd *abfd, int vendor, int tag,
+bfd_elf_add_obj_attr_int_string (bfd *abfd, int vendor,
+ unsigned int tag,
unsigned int i, const char *s)
{
obj_attribute *attr;
/* Determine whether a GNU object attribute tag takes an integer, a
string or both. */
static int
-gnu_obj_attrs_arg_type (int tag)
+gnu_obj_attrs_arg_type (unsigned int tag)
{
/* Except for Tag_compatibility, for GNU attributes we follow the
same rule ARM ones > 32 follow: odd-numbered tags take strings
/* Determine what arguments an attribute tag takes. */
int
-_bfd_elf_obj_attrs_arg_type (bfd *abfd, int vendor, int tag)
+_bfd_elf_obj_attrs_arg_type (bfd *abfd, int vendor, unsigned int tag)
{
switch (vendor)
{
{
bfd_byte *contents;
bfd_byte *p;
+ bfd_byte *p_end;
bfd_vma len;
const char *std_sec;
+ /* PR 17512: file: 2844a11d. */
+ if (hdr->sh_size == 0)
+ return;
contents = (bfd_byte *) bfd_malloc (hdr->sh_size);
if (!contents)
return;
return;
}
p = contents;
+ p_end = p + hdr->sh_size;
std_sec = get_elf_backend_data (abfd)->obj_attrs_vendor;
+
if (*(p++) == 'A')
{
len = hdr->sh_size - 1;
- while (len > 0)
+
+ while (len > 0 && p < p_end - 4)
{
- int namelen;
+ unsigned namelen;
bfd_vma section_len;
int vendor;
section_len = bfd_get_32 (abfd, p);
p += 4;
+ if (section_len == 0)
+ break;
if (section_len > len)
section_len = len;
len -= section_len;
- namelen = strlen ((char *) p) + 1;
- section_len -= namelen + 4;
+ section_len -= 4;
+ namelen = strnlen ((char *) p, section_len) + 1;
+ if (namelen == 0 || namelen >= section_len)
+ break;
+ section_len -= namelen;
if (std_sec && strcmp ((char *) p, std_sec) == 0)
vendor = OBJ_ATTR_PROC;
else if (strcmp ((char *) p, "gnu") == 0)
}
p += namelen;
- while (section_len > 0)
+ while (section_len > 0 && p < p_end)
{
- int tag;
+ unsigned int tag;
unsigned int n;
unsigned int val;
bfd_vma subsection_len;
bfd_byte *end;
- tag = read_unsigned_leb128 (abfd, p, &n);
+ tag = safe_read_leb128 (abfd, p, &n, FALSE, p_end);
p += n;
- subsection_len = bfd_get_32 (abfd, p);
+ if (p < p_end - 4)
+ subsection_len = bfd_get_32 (abfd, p);
+ else
+ subsection_len = 0;
p += 4;
+ if (subsection_len == 0)
+ break;
if (subsection_len > section_len)
subsection_len = section_len;
section_len -= subsection_len;
subsection_len -= n + 4;
end = p + subsection_len;
+ /* PR 17512: file: 0e8c0c90. */
+ if (end > p_end)
+ end = p_end;
switch (tag)
{
case Tag_File:
{
int type;
- tag = read_unsigned_leb128 (abfd, p, &n);
+ tag = safe_read_leb128 (abfd, p, &n, FALSE, end);
p += n;
type = _bfd_elf_obj_attrs_arg_type (abfd, vendor, tag);
switch (type & (ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL))
{
case ATTR_TYPE_FLAG_INT_VAL | ATTR_TYPE_FLAG_STR_VAL:
- val = read_unsigned_leb128 (abfd, p, &n);
+ val = safe_read_leb128 (abfd, p, &n, FALSE, end);
p += n;
bfd_elf_add_obj_attr_int_string (abfd, vendor, tag,
- val, (char *)p);
+ val, (char *) p);
p += strlen ((char *)p) + 1;
break;
case ATTR_TYPE_FLAG_STR_VAL:
bfd_elf_add_obj_attr_string (abfd, vendor, tag,
- (char *)p);
+ (char *) p);
p += strlen ((char *)p) + 1;
break;
case ATTR_TYPE_FLAG_INT_VAL:
- val = read_unsigned_leb128 (abfd, p, &n);
+ val = safe_read_leb128 (abfd, p, &n, FALSE, end);
p += n;
bfd_elf_add_obj_attr_int (abfd, vendor, tag, val);
break;
for (; in_list || out_list; )
{
bfd *err_bfd = NULL;
- int err_tag = 0;
+ unsigned int err_tag = 0;
/* The tags for each list are in numerical order. */
/* If the tags are equal, then merge. */