/* Multiple versions of memcpy All versions must be listed in ifunc-impl-list.c. Copyright (C) 2010-2013 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 . */ #include #include /* Define multiple versions only for the definition in lib and for DSO. In static binaries we need memcpy before the initialization happened. */ #if defined SHARED && !defined NOT_IN_libc .text ENTRY(memcpy) .type memcpy, @gnu_indirect_function pushl %ebx cfi_adjust_cfa_offset (4) cfi_rel_offset (ebx, 0) LOAD_PIC_REG(bx) cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) jne 1f call __init_cpu_features 1: leal __memcpy_ia32@GOTOFF(%ebx), %eax testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx) jz 2f leal __memcpy_ssse3@GOTOFF(%ebx), %eax testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx) jz 2f leal __memcpy_ssse3_rep@GOTOFF(%ebx), %eax 2: popl %ebx cfi_adjust_cfa_offset (-4) cfi_restore (ebx) ret END(memcpy) # undef ENTRY # define ENTRY(name) \ .type __memcpy_ia32, @function; \ .p2align 4; \ .globl __memcpy_ia32; \ .hidden __memcpy_ia32; \ __memcpy_ia32: cfi_startproc; \ CALL_MCOUNT # undef END # define END(name) \ cfi_endproc; .size __memcpy_ia32, .-__memcpy_ia32 # undef ENTRY_CHK # define ENTRY_CHK(name) \ .type __memcpy_chk_ia32, @function; \ .globl __memcpy_chk_ia32; \ .p2align 4; \ __memcpy_chk_ia32: cfi_startproc; \ CALL_MCOUNT # undef END_CHK # define END_CHK(name) \ cfi_endproc; .size __memcpy_chk_ia32, .-__memcpy_chk_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_memcpy; __GI_memcpy = __memcpy_ia32 #endif #include "../memcpy.S"