/* BFD back-end for VERSAdos-E objects.
- Copyright (C) 1995-2015 Free Software Foundation, Inc.
+ Copyright (C) 1995-2018 Free Software Foundation, Inc.
Written by Steve Chamberlain of Cygnus Support <sac@cygnus.com>.
Versados is a Motorola trademark.
{
asection *section; /* Ptr to bfd version. */
unsigned char *contents; /* Used to build image. */
+ bfd_size_type content_size; /* The size of the contents buffer. */
int pc;
int relocs; /* Reloc count, valid end of pass 1. */
int donerel; /* Have relocs been translated. */
unsigned char esd_entries[1];
};
-#define ESD_ABS 0
-#define ESD_COMMON 1
+#define ESD_ABS 0
+#define ESD_COMMON 1
#define ESD_STD_REL_SEC 2
#define ESD_SHRT_REL_SEC 3
#define ESD_XDEF_IN_SEC 4
if (abfd->tdata.versados_data == NULL)
{
bfd_size_type amt = sizeof (tdata_type);
- tdata_type *tdata = bfd_alloc (abfd, amt);
+ tdata_type *tdata = bfd_zalloc (abfd, amt);
if (tdata == NULL)
return FALSE;
break;
case ESD_XDEF_IN_ABS:
sec = bfd_abs_section_ptr;
+ /* Fall through. */
case ESD_XDEF_IN_SEC:
{
int snum = VDATA (abfd)->def_idx++;
};
static int
-get_offset (int len, unsigned char *ptr)
+get_offset (unsigned int len, unsigned char *ptr)
{
int val = 0;
if (len)
{
- int i;
+ unsigned int i;
val = *ptr++;
if (val & 0x80)
| (otr->map[2] << 8)
| (otr->map[3] << 0);
- struct esdid *esdid = &EDATA (abfd, otr->esdid - 1);
+ struct esdid *esdid;
unsigned char *contents;
bfd_boolean need_contents = FALSE;
unsigned int dst_idx;
/* PR 17512: file: ac7da425. */
if (otr->esdid == 0)
return;
-
+
+ esdid = &EDATA (abfd, otr->esdid - 1);
contents = esdid->contents;
dst_idx = esdid->pc;
-
+
for (shift = ((unsigned long) 1 << 31); shift && srcp < endp; shift >>= 1)
{
if (bits & shift)
int flag = *srcp++;
int esdids = (flag >> 5) & 0x7;
int sizeinwords = ((flag >> 3) & 1) ? 2 : 1;
- int offsetlen = flag & 0x7;
+ unsigned int offsetlen = flag & 0x7;
int j;
+ /* PR 21591: Check for invalid lengths. */
+ if (srcp + esdids + offsetlen >= endp)
+ return;
+
if (esdids == 0)
{
/* A zero esdid means the new pc is the offset given. */
if (pass == 1)
need_contents = TRUE;
- else if (contents && dst_idx < esdid->section->size - sizeinwords * 2)
+ else if (contents && dst_idx < esdid->content_size - sizeinwords * 2)
for (j = 0; j < sizeinwords * 2; j++)
{
contents[dst_idx + (sizeinwords * 2) - j - 1] = val;
{
need_contents = TRUE;
- if (esdid->section && contents && dst_idx < esdid->section->size)
+ if (esdid->section && contents && dst_idx < esdid->content_size - 1)
if (pass == 2)
{
/* Absolute code, comes in 16 bit lumps. */
size = esdid->section->size;
esdid->contents = bfd_alloc (abfd, size);
+ esdid->content_size = size;
}
else
esdid->contents = NULL;
file_ptr offset,
bfd_size_type count)
{
+ struct esdid *esdid;
+
if (!versados_pass_2 (abfd))
return FALSE;
- memcpy (location,
- EDATA (abfd, section->target_index).contents + offset,
- (size_t) count);
+ esdid = &EDATA (abfd, section->target_index);
+
+ if (esdid->contents == NULL
+ || offset < 0
+ || (bfd_size_type) offset > esdid->content_size
+ || offset + count > esdid->content_size)
+ return FALSE;
+
+ memcpy (location, esdid->contents + offset, (size_t) count);
return TRUE;
}
return section->reloc_count;
}
-#define versados_close_and_cleanup _bfd_generic_close_and_cleanup
-#define versados_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
-#define versados_new_section_hook _bfd_generic_new_section_hook
-#define versados_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
-#define versados_bfd_is_local_label_name bfd_generic_is_local_label_name
-#define versados_get_lineno _bfd_nosymbols_get_lineno
-#define versados_find_nearest_line _bfd_nosymbols_find_nearest_line
-#define versados_find_line _bfd_nosymbols_find_line
-#define versados_find_inliner_info _bfd_nosymbols_find_inliner_info
+#define versados_close_and_cleanup _bfd_generic_close_and_cleanup
+#define versados_bfd_free_cached_info _bfd_generic_bfd_free_cached_info
+#define versados_new_section_hook _bfd_generic_new_section_hook
+#define versados_bfd_is_target_special_symbol ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
+#define versados_bfd_is_local_label_name bfd_generic_is_local_label_name
+#define versados_get_lineno _bfd_nosymbols_get_lineno
+#define versados_find_nearest_line _bfd_nosymbols_find_nearest_line
+#define versados_find_line _bfd_nosymbols_find_line
+#define versados_find_inliner_info _bfd_nosymbols_find_inliner_info
#define versados_get_symbol_version_string _bfd_nosymbols_get_symbol_version_string
-#define versados_make_empty_symbol _bfd_generic_make_empty_symbol
-#define versados_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
-#define versados_read_minisymbols _bfd_generic_read_minisymbols
-#define versados_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
-#define versados_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
-#define versados_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
-#define versados_set_arch_mach bfd_default_set_arch_mach
+#define versados_make_empty_symbol _bfd_generic_make_empty_symbol
+#define versados_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
+#define versados_read_minisymbols _bfd_generic_read_minisymbols
+#define versados_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
+#define versados_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
+#define versados_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
+#define versados_set_arch_mach bfd_default_set_arch_mach
#define versados_bfd_get_relocated_section_contents bfd_generic_get_relocated_section_contents
-#define versados_bfd_relax_section bfd_generic_relax_section
-#define versados_bfd_gc_sections bfd_generic_gc_sections
-#define versados_bfd_lookup_section_flags bfd_generic_lookup_section_flags
-#define versados_bfd_merge_sections bfd_generic_merge_sections
-#define versados_bfd_is_group_section bfd_generic_is_group_section
-#define versados_bfd_discard_group bfd_generic_discard_group
-#define versados_section_already_linked _bfd_generic_section_already_linked
-#define versados_bfd_define_common_symbol bfd_generic_define_common_symbol
-#define versados_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
-#define versados_bfd_link_add_symbols _bfd_generic_link_add_symbols
-#define versados_bfd_link_just_syms _bfd_generic_link_just_syms
+#define versados_bfd_relax_section bfd_generic_relax_section
+#define versados_bfd_gc_sections bfd_generic_gc_sections
+#define versados_bfd_lookup_section_flags bfd_generic_lookup_section_flags
+#define versados_bfd_merge_sections bfd_generic_merge_sections
+#define versados_bfd_is_group_section bfd_generic_is_group_section
+#define versados_bfd_discard_group bfd_generic_discard_group
+#define versados_section_already_linked _bfd_generic_section_already_linked
+#define versados_bfd_define_common_symbol bfd_generic_define_common_symbol
+#define versados_bfd_define_start_stop bfd_generic_define_start_stop
+#define versados_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
+#define versados_bfd_link_add_symbols _bfd_generic_link_add_symbols
+#define versados_bfd_link_just_syms _bfd_generic_link_just_syms
#define versados_bfd_copy_link_hash_symbol_type \
_bfd_generic_copy_link_hash_symbol_type
-#define versados_bfd_final_link _bfd_generic_final_link
-#define versados_bfd_link_split_section _bfd_generic_link_split_section
+#define versados_bfd_final_link _bfd_generic_final_link
+#define versados_bfd_link_split_section _bfd_generic_link_split_section
+#define versados_bfd_link_check_relocs _bfd_generic_link_check_relocs
+#define versados_set_reloc _bfd_generic_set_reloc
const bfd_target m68k_versados_vec =
{
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