mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 15:00:06 +00:00
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
|
/* __simple_dl_elf_hash for testing true elf symbol lookup.
|
||
|
|
Copyright (C) 2022 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/>. */
|
||
|
|
|
||
|
|
#ifndef _SIMPLE_DL_ELF_HASH_H
|
||
|
|
#define _SIMPLE_DL_ELF_HASH_H 1
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/* For testing/benchmarking purposes. Real implementation in
|
||
|
|
sysdeps/generic/dl-hash.h. */
|
||
|
|
static uint32_t
|
||
|
|
__attribute__ ((unused))
|
||
|
|
__simple_dl_elf_hash (const char *name_arg)
|
||
|
|
{
|
||
|
|
unsigned long int hash = 0;
|
||
|
|
for (unsigned char c = *name_arg; c != '\0'; c = *(++name_arg))
|
||
|
|
{
|
||
|
|
unsigned long int hi;
|
||
|
|
hash = (hash << 4) + c;
|
||
|
|
hi = hash & 0xf0000000;
|
||
|
|
hash ^= hi >> 24;
|
||
|
|
hash &= 0x0fffffff;
|
||
|
|
}
|
||
|
|
return hash;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* simple-dl-hash.h */
|