diff options
Diffstat (limited to 'REORG.TODO/sysdeps/i386/i686/multiarch/strlen.S')
| -rw-r--r-- | REORG.TODO/sysdeps/i386/i686/multiarch/strlen.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/i686/multiarch/strlen.S b/REORG.TODO/sysdeps/i386/i686/multiarch/strlen.S new file mode 100644 index 0000000000..77cf6bcdb0 --- /dev/null +++ b/REORG.TODO/sysdeps/i386/i686/multiarch/strlen.S @@ -0,0 +1,60 @@ +/* Multiple versions of strlen + All versions must be listed in ifunc-impl-list.c. + Copyright (C) 2009-2017 Free Software Foundation, Inc. + Contributed by Intel Corporation. + 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 + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <init-arch.h> + +/* Define multiple versions only for the definition in libc and for the + DSO. In static binaries, we need strlen before the initialization + happened. */ +#if defined SHARED && IS_IN (libc) + .text +ENTRY(strlen) + .type strlen, @gnu_indirect_function + LOAD_GOT_AND_RTLD_GLOBAL_RO + LOAD_FUNC_GOT_EAX (__strlen_ia32) + HAS_CPU_FEATURE (SSE2) + jz 2f + LOAD_FUNC_GOT_EAX (__strlen_sse2_bsf) + HAS_ARCH_FEATURE (Slow_BSF) + jz 2f + LOAD_FUNC_GOT_EAX (__strlen_sse2) +2: ret +END(strlen) + +# undef ENTRY +# define ENTRY(name) \ + .type __strlen_ia32, @function; \ + .globl __strlen_ia32; \ + .p2align 4; \ + __strlen_ia32: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __strlen_ia32, .-__strlen_ia32 +# undef libc_hidden_builtin_def +/* IFUNC doesn't work with the hidden functions in shared library since + they will be called without setting up EBX needed for PLT which is + used by IFUNC. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_strlen; __GI_strlen = __strlen_ia32 +#endif + +#include "../../i586/strlen.S" |