1 | /* Multiple versions of strcpy |
2 | All versions must be listed in ifunc-impl-list.c. |
3 | Copyright (C) 2009-2017 Free Software Foundation, Inc. |
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 |
18 | License along with the GNU C Library; if not, see |
19 | <http://www.gnu.org/licenses/>. */ |
20 | |
21 | #include <sysdep.h> |
22 | #include <init-arch.h> |
23 | |
24 | #if !defined (USE_AS_STPCPY) && !defined (USE_AS_STRNCPY) |
25 | # ifndef STRCPY |
26 | # define STRCPY strcpy |
27 | # endif |
28 | #endif |
29 | |
30 | #ifdef USE_AS_STPCPY |
31 | # ifdef USE_AS_STRNCPY |
32 | # define STRCPY_SSSE3 __stpncpy_ssse3 |
33 | # define STRCPY_SSE2 __stpncpy_sse2 |
34 | # define STRCPY_SSE2_UNALIGNED __stpncpy_sse2_unaligned |
35 | # define __GI_STRCPY __GI_stpncpy |
36 | # define __GI___STRCPY __GI___stpncpy |
37 | # else |
38 | # define STRCPY_SSSE3 __stpcpy_ssse3 |
39 | # define STRCPY_SSE2 __stpcpy_sse2 |
40 | # define STRCPY_SSE2_UNALIGNED __stpcpy_sse2_unaligned |
41 | # define __GI_STRCPY __GI_stpcpy |
42 | # define __GI___STRCPY __GI___stpcpy |
43 | # endif |
44 | #else |
45 | # ifdef USE_AS_STRNCPY |
46 | # define STRCPY_SSSE3 __strncpy_ssse3 |
47 | # define STRCPY_SSE2 __strncpy_sse2 |
48 | # define STRCPY_SSE2_UNALIGNED __strncpy_sse2_unaligned |
49 | # define __GI_STRCPY __GI_strncpy |
50 | # else |
51 | # define STRCPY_SSSE3 __strcpy_ssse3 |
52 | # define STRCPY_SSE2 __strcpy_sse2 |
53 | # define STRCPY_SSE2_UNALIGNED __strcpy_sse2_unaligned |
54 | # define __GI_STRCPY __GI_strcpy |
55 | # endif |
56 | #endif |
57 | |
58 | |
59 | /* Define multiple versions only for the definition in libc. */ |
60 | #if IS_IN (libc) |
61 | .text |
62 | ENTRY(STRCPY) |
63 | .type STRCPY, @gnu_indirect_function |
64 | LOAD_RTLD_GLOBAL_RO_RDX |
65 | leaq STRCPY_SSE2_UNALIGNED(%rip), %rax |
66 | HAS_ARCH_FEATURE (Fast_Unaligned_Load) |
67 | jnz 2f |
68 | leaq STRCPY_SSE2(%rip), %rax |
69 | HAS_CPU_FEATURE (SSSE3) |
70 | jz 2f |
71 | leaq STRCPY_SSSE3(%rip), %rax |
72 | 2: ret |
73 | END(STRCPY) |
74 | |
75 | # undef ENTRY |
76 | # define ENTRY(name) \ |
77 | .type STRCPY_SSE2, @function; \ |
78 | .align 16; \ |
79 | .globl STRCPY_SSE2; \ |
80 | .hidden STRCPY_SSE2; \ |
81 | STRCPY_SSE2: cfi_startproc; \ |
82 | CALL_MCOUNT |
83 | # undef END |
84 | # define END(name) \ |
85 | cfi_endproc; .size STRCPY_SSE2, .-STRCPY_SSE2 |
86 | # undef libc_hidden_builtin_def |
87 | /* It doesn't make sense to send libc-internal strcpy calls through a PLT. |
88 | The speedup we get from using SSSE3 instruction is likely eaten away |
89 | by the indirect call in the PLT. */ |
90 | # define libc_hidden_builtin_def(name) \ |
91 | .globl __GI_STRCPY; __GI_STRCPY = STRCPY_SSE2 |
92 | # undef libc_hidden_def |
93 | # define libc_hidden_def(name) \ |
94 | .globl __GI___STRCPY; __GI___STRCPY = STRCPY_SSE2 |
95 | #endif |
96 | |
97 | #ifndef USE_AS_STRNCPY |
98 | #include "../strcpy.S" |
99 | #endif |
100 | |