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* elf-bfd.h (struct elf_link_hash_entry): Add vtable_entries_size.

Browse Source 
* elf.c (_bfd_elf_link_hash_newfunc): Clear it.
        * elflink.h (elf_gc_propagate_vtable_entries_used): Copy it, and
        respect it as an upper bound on what memory to reference.
        (elf_gc_smash_unused_vtentry_relocs): Likewise.
        (elf_gc_record_vtentry): Handle as-yet undefined vtables.  Set and
        update vtable_entries_size appropriately.
This commit is contained in:
Richard Henderson 1998-11-18 04:26:39 +00:00
parent 206e3a8a5c
commit 468bc0c5fe
2 changed files with 54 additions and 8 deletions
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10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
Tue Nov 17 20:23:35 1998 Richard Henderson <rth@cygnus.com>
* elf-bfd.h (struct elf_link_hash_entry): Add vtable_entries_size.
* elf.c (_bfd_elf_link_hash_newfunc): Clear it.
* elflink.h (elf_gc_propagate_vtable_entries_used): Copy it, and
respect it as an upper bound on what memory to reference.
(elf_gc_smash_unused_vtentry_relocs): Likewise.
(elf_gc_record_vtentry): Handle as-yet undefined vtables. Set and
update vtable_entries_size appropriately.
Tue Nov 17 15:28:31 1998 Nick Clifton <nickc@cygnus.com>
* elf32-fr30.c (fr30_reloc_type_lookup): Used integers to hold

52
bfd/elflink.h
View File

@ -5724,6 +5724,7 @@ elf_gc_propagate_vtable_entries_used (h, okp)
/* None of this table's entries were referenced. Re-use the
parent's table. */
h->vtable_entries_used = h->vtable_parent->vtable_entries_used;
h->vtable_entries_size = h->vtable_parent->vtable_entries_size;
}
else
{
@ -5736,7 +5737,7 @@ elf_gc_propagate_vtable_entries_used (h, okp)
pu = h->vtable_parent->vtable_entries_used;
if (pu != NULL)
{
n = h->vtable_parent->size / FILE_ALIGN;
n = h->vtable_parent->vtable_entries_size / FILE_ALIGN;
while (--n != 0)
{
if (*pu) *cu = true;
@ -5779,7 +5780,8 @@ elf_gc_smash_unused_vtentry_relocs (h, okp)
if (rel->r_offset >= hstart && rel->r_offset < hend)
{
/* If the entry is in use, do nothing. */
if (h->vtable_entries_used)
if (h->vtable_entries_used
&& (rel->r_offset - hstart) < h->vtable_entries_size)
{
bfd_vma entry = (rel->r_offset - hstart) / FILE_ALIGN;
if (h->vtable_entries_used[entry])
@ -5911,17 +5913,51 @@ elf_gc_record_vtentry (abfd, sec, h, addend)
struct elf_link_hash_entry *h;
bfd_vma addend;
{
if (h->vtable_entries_used == NULL)
if (addend >= h->vtable_entries_size)
{
size_t size, bytes;
boolean *ptr = h->vtable_entries_used;
/* While the symbol is undefined, we have to be prepared to handle
a zero size. */
if (h->root.type == bfd_link_hash_undefined)
size = addend;
else
{
size = h->size;
if (size < addend)
{
/* Oops! We've got a reference past the defined end of
the table. This is probably a bug -- shall we warn? */
size = addend;
}
}
/* Allocate one extra entry for use as a "done" flag for the
consolidation pass. */
size_t size = (h->size / FILE_ALIGN + 1) * sizeof(boolean);
h->vtable_entries_used = (boolean *) bfd_alloc (abfd, size);
if (h->vtable_entries_used == NULL)
return false;
bytes = (size / FILE_ALIGN + 1) * sizeof(boolean);
if (ptr)
{
size_t oldbytes;
ptr = realloc (ptr-1, bytes);
if (ptr == NULL)
return false;
oldbytes = (h->vtable_entries_size/FILE_ALIGN + 1) * sizeof(boolean);
memset (ptr + oldbytes, 0, bytes - oldbytes);
}
else
{
ptr = calloc (1, bytes);
if (ptr == NULL)
return false;
}
/* And arrange for that done flag to be at index -1. */
memset (h->vtable_entries_used++, 0, size);
h->vtable_entries_used = ptr+1;
h->vtable_entries_size = size;
}
h->vtable_entries_used[addend / FILE_ALIGN] = true;