mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 05:50:14 +00:00
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
/* Cache the location of a link map hash table.
|
|
Copyright (C) 1995-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <assert.h>
|
|
#include <link.h>
|
|
#include <ldsodefs.h>
|
|
|
|
void
|
|
_dl_setup_hash (struct link_map *map)
|
|
{
|
|
Elf_Symndx *hash;
|
|
|
|
if (__glibc_likely (map->l_info[ELF_MACHINE_GNU_HASH_ADDRIDX] != NULL))
|
|
{
|
|
Elf32_Word *hash32
|
|
= (void *) D_PTR (map, l_info[ELF_MACHINE_GNU_HASH_ADDRIDX]);
|
|
map->l_nbuckets = *hash32++;
|
|
Elf32_Word symbias = *hash32++;
|
|
Elf32_Word bitmask_nwords = *hash32++;
|
|
/* Must be a power of two. */
|
|
assert ((bitmask_nwords & (bitmask_nwords - 1)) == 0);
|
|
map->l_gnu_bitmask_idxbits = bitmask_nwords - 1;
|
|
map->l_gnu_shift = *hash32++;
|
|
|
|
map->l_gnu_bitmask = (ElfW(Addr) *) hash32;
|
|
hash32 += __ELF_NATIVE_CLASS / 32 * bitmask_nwords;
|
|
|
|
map->l_gnu_buckets = hash32;
|
|
hash32 += map->l_nbuckets;
|
|
map->l_gnu_chain_zero = hash32 - symbias;
|
|
|
|
/* Initialize MIPS xhash translation table. */
|
|
ELF_MACHINE_XHASH_SETUP (hash32, symbias, map);
|
|
|
|
return;
|
|
}
|
|
|
|
if (!map->l_info[DT_HASH])
|
|
return;
|
|
hash = (void *) D_PTR (map, l_info[DT_HASH]);
|
|
|
|
map->l_nbuckets = *hash++;
|
|
/* Skip nchain. */
|
|
hash++;
|
|
map->l_buckets = hash;
|
|
hash += map->l_nbuckets;
|
|
map->l_chain = hash;
|
|
}
|