projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 2c709c6f | 1 | /* Multiple versions of strlen |
| b090e8ea | 2 | All versions must be listed in ifunc-impl-list.c. |
| f7a9f785 | 3 | Copyright (C) 2009-2016 Free Software Foundation, Inc. |
| 2c709c6f UD |
4 | Contributed by Intel Corporation. |
| 5 | This file is part of the GNU C Library. | |
| 6 | ||
| 7 | The GNU C Library is free software; you can redistribute it and/or | |
| 8 | modify it under the terms of the GNU Lesser General Public | |
| 9 | License as published by the Free Software Foundation; either | |
| 10 | version 2.1 of the License, or (at your option) any later version. | |
| 11 | ||
| 12 | The GNU C Library is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | Lesser General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
18 | License along with the GNU C Library; if not, see |
| 19 | <http://www.gnu.org/licenses/>. */ | |
| 2c709c6f UD |
20 | |
| 21 | #include <sysdep.h> | |
| 2510d01d | 22 | #include <init-arch.h> |
| 2c709c6f UD |
23 | |
| 24 | /* Define multiple versions only for the definition in libc and for the | |
| 25 | DSO. In static binaries, we need strlen before the initialization | |
| 26 | happened. */ | |
| 4f41c682 | 27 | #if defined SHARED && IS_IN (libc) |
| 2c709c6f UD |
28 | .text |
| 29 | ENTRY(strlen) | |
| 30 | .type strlen, @gnu_indirect_function | |
| 1aee37a2 L |
31 | LOAD_GOT_AND_RTLD_GLOBAL_RO |
| 32 | LOAD_FUNC_GOT_EAX (__strlen_ia32) | |
| 33 | HAS_CPU_FEATURE (SSE2) | |
| 2c709c6f | 34 | jz 2f |
| 1aee37a2 L |
35 | LOAD_FUNC_GOT_EAX (__strlen_sse2_bsf) |
| 36 | HAS_ARCH_FEATURE (Slow_BSF) | |
| e73015f2 | 37 | jz 2f |
| 1aee37a2 L |
38 | LOAD_FUNC_GOT_EAX (__strlen_sse2) |
| 39 | 2: ret | |
| 2c709c6f UD |
40 | END(strlen) |
| 41 | ||
| 2c709c6f UD |
42 | # undef ENTRY |
| 43 | # define ENTRY(name) \ | |
| 44 | .type __strlen_ia32, @function; \ | |
| 45 | .globl __strlen_ia32; \ | |
| 2d2f482e | 46 | .p2align 4; \ |
| 2c709c6f UD |
47 | __strlen_ia32: cfi_startproc; \ |
| 48 | CALL_MCOUNT | |
| 49 | # undef END | |
| 50 | # define END(name) \ | |
| 51 | cfi_endproc; .size __strlen_ia32, .-__strlen_ia32 | |
| 52 | # undef libc_hidden_builtin_def | |
| 53 | /* IFUNC doesn't work with the hidden functions in shared library since | |
| 54 | they will be called without setting up EBX needed for PLT which is | |
| 55 | used by IFUNC. */ | |
| 56 | # define libc_hidden_builtin_def(name) \ | |
| 57 | .globl __GI_strlen; __GI_strlen = __strlen_ia32 | |
| 58 | #endif | |
| 59 | ||
| 60 | #include "../../i586/strlen.S" |