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aebcf54c | 1 | /* Save current context and jump to a new context. |
04277e02 | 2 | Copyright (C) 2002-2019 Free Software Foundation, Inc. |
aebcf54c UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
aebcf54c UD |
18 | |
19 | #include <sysdep.h> | |
5ef6ae4b | 20 | #include <rtld-global-offsets.h> |
54ee14b3 | 21 | #include <shlib-compat.h> |
aebcf54c UD |
22 | |
23 | #define __ASSEMBLY__ | |
24 | #include <asm/ptrace.h> | |
25 | #include "ucontext_i.h" | |
26 | ||
c50ce9a4 UD |
27 | #define __CONTEXT_FUNC_NAME __swapcontext |
28 | #define __CONTEXT_ENABLE_FPRS 1 | |
29 | #define __CONTEXT_ENABLE_VRS 1 | |
30 | ||
31 | /* Size of ucontext in GLIBC_2.3.4 and later. */ | |
32 | #define _UC_SIZE_2_3_4 1184 | |
33 | ||
c50ce9a4 UD |
34 | .section ".text"; |
35 | ENTRY (__swapcontext) | |
36 | li r5,_UC_SIZE_2_3_4; | |
37 | DO_CALL (SYS_ify (swapcontext)); | |
38 | bso- cr0,1f | |
39 | /* the kernel does not set the return code for the success case */ | |
40 | li r3,0 | |
a334319f | 41 | blr |
c50ce9a4 UD |
42 | 1: |
43 | b __syscall_error@local | |
a334319f | 44 | END(__swapcontext) |
5ef6ae4b UD |
45 | |
46 | versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4) | |
47 | ||
48 | #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4) | |
49 | ||
d3a4a571 | 50 | compat_text_section |
9c84384c JM |
51 | |
52 | # undef __CONTEXT_FUNC_NAME | |
c50ce9a4 UD |
53 | # define __CONTEXT_FUNC_NAME __novec_swapcontext |
54 | # undef __CONTEXT_ENABLE_VRS | |
aebcf54c | 55 | |
c50ce9a4 | 56 | # include "swapcontext-common.S" |
aebcf54c | 57 | |
d3a4a571 | 58 | .previous |
5ef6ae4b UD |
59 | |
60 | compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3) | |
aebcf54c | 61 | |
5ef6ae4b | 62 | #endif |
54ee14b3 UD |
63 | |
64 | #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3) | |
65 | ||
c50ce9a4 UD |
66 | # define _ERRNO_H 1 |
67 | # include <bits/errno.h> | |
54ee14b3 | 68 | |
d3a4a571 | 69 | compat_text_section |
54ee14b3 UD |
70 | ENTRY (__swapcontext_stub) |
71 | li r3,ENOSYS | |
b0e196a4 | 72 | b __syscall_error@local |
d3a4a571 UD |
73 | END (__swapcontext_stub) |
74 | .previous | |
54ee14b3 UD |
75 | |
76 | compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1) | |
77 | ||
78 | #endif |