1 /* __simple_dl_elf_hash for testing true elf symbol lookup.
2    Copyright (C) 2022 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library; if not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 #ifndef _SIMPLE_DL_ELF_HASH_H
20 #define _SIMPLE_DL_ELF_HASH_H 1
21 
22 #include <stdint.h>
23 
24 /* For testing/benchmarking purposes.  Real implementation in
25    sysdeps/generic/dl-hash.h.  */
26 static uint32_t
27 __attribute__ ((unused))
__simple_dl_elf_hash(const char * name_arg)28 __simple_dl_elf_hash (const char *name_arg)
29 {
30   unsigned long int hash = 0;
31   for (unsigned char c = *name_arg; c != '\0'; c = *(++name_arg))
32     {
33       unsigned long int hi;
34       hash = (hash << 4) + c;
35       hi = hash & 0xf0000000;
36       hash ^= hi >> 24;
37       hash &= 0x0fffffff;
38     }
39   return hash;
40 }
41 
42 #endif /* simple-dl-hash.h */
43