projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 3af48cbd | 1 | /* Multiple versions of __memcpy_chk |
| b090e8ea | 2 | All versions must be listed in ifunc-impl-list.c. |
| b168057a | 3 | Copyright (C) 2010-2015 Free Software Foundation, Inc. |
| 3af48cbd L |
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/>. */ | |
| 3af48cbd L |
20 | |
| 21 | #include <sysdep.h> | |
| 22 | #include <init-arch.h> | |
| 23 | ||
| 24 | /* Define multiple versions only for the definition in lib and for | |
| 25 | DSO. There are no multiarch memcpy functions for static binaries. | |
| 26 | */ | |
| 4f41c682 | 27 | #if IS_IN (libc) |
| 3af48cbd | 28 | # ifdef SHARED |
| 3af48cbd L |
29 | .text |
| 30 | ENTRY(__memcpy_chk) | |
| 31 | .type __memcpy_chk, @gnu_indirect_function | |
| 32 | pushl %ebx | |
| 33 | cfi_adjust_cfa_offset (4) | |
| 34 | cfi_rel_offset (ebx, 0) | |
| 9a1d9254 | 35 | LOAD_PIC_REG(bx) |
| 3af48cbd L |
36 | cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) |
| 37 | jne 1f | |
| 38 | call __init_cpu_features | |
| 39 | 1: leal __memcpy_chk_ia32@GOTOFF(%ebx), %eax | |
| 8b4416d8 AS |
40 | testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx) |
| 41 | jz 2f | |
| 42 | leal __memcpy_chk_sse2_unaligned@GOTOFF(%ebx), %eax | |
| 43 | testl $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features@GOTOFF(%ebx) | |
| 44 | jnz 2f | |
| 3af48cbd L |
45 | testl $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx) |
| 46 | jz 2f | |
| 47 | leal __memcpy_chk_ssse3@GOTOFF(%ebx), %eax | |
| 48 | testl $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx) | |
| 49 | jz 2f | |
| 50 | leal __memcpy_chk_ssse3_rep@GOTOFF(%ebx), %eax | |
| 51 | 2: popl %ebx | |
| 52 | cfi_adjust_cfa_offset (-4) | |
| 53 | cfi_restore (ebx) | |
| 54 | ret | |
| 55 | END(__memcpy_chk) | |
| 56 | # else | |
| 57 | # include "../memcpy_chk.S" | |
| 58 | # endif | |
| 59 | #endif |