1/* Save current context and jump to a new context.
2   Copyright (C) 2002-2022 Free Software Foundation, Inc.
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
16   License along with the GNU C Library.  If not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#include <sysdep.h>
20#include <rtld-global-offsets.h>
21#include <shlib-compat.h>
22
23#define __ASSEMBLY__
24#include <asm/ptrace.h>
25#include "ucontext_i.h"
26
27#define __CONTEXT_FUNC_NAME __swapcontext
28#undef __CONTEXT_ENABLE_FPRS
29#undef __CONTEXT_ENABLE_VRS
30
31# include "swapcontext-common.S"
32
33versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
34
35#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
36
37/* For the nofpu case the old/new versions are the same function.  */
38strong_alias (__swapcontext, __novec_swapcontext)
39
40compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3)
41
42#endif
43
44#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
45
46#define _ERRNO_H	1
47#include <bits/errno.h>
48
49	compat_text_section
50ENTRY (__swapcontext_stub)
51	li	r3,ENOSYS
52	b	__syscall_error@local
53END (__swapcontext_stub)
54	.previous
55
56compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1)
57
58#endif
59