1/* 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 __setcontext
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
34	.section ".text";
35ENTRY (__setcontext)
36	mr	r4,r3
37	li	r3,0
38	li	r5,_UC_SIZE_2_3_4;
39	DO_CALL (SYS_ify (swapcontext));
40	bso-	cr0,1f
41/* the kernel does not set the return code for the success case */
42	li	r3,0
43	blr
441:
45	b	__syscall_error@local
46END(__setcontext)
47
48versioned_symbol (libc, __setcontext, setcontext, GLIBC_2_3_4)
49
50#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
51
52	compat_text_section
53
54# undef __CONTEXT_FUNC_NAME
55# define __CONTEXT_FUNC_NAME __novec_setcontext
56# undef __CONTEXT_ENABLE_VRS
57
58# include "setcontext-common.S"
59
60	.previous
61
62compat_symbol (libc, __novec_setcontext, setcontext, GLIBC_2_3_3)
63
64#endif
65
66#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_3_3)
67
68# define _ERRNO_H	1
69# include <bits/errno.h>
70
71	compat_text_section
72ENTRY (__setcontext_stub)
73	li	r3,ENOSYS
74	b	__syscall_error@local
75END (__setcontext_stub)
76	.previous
77
78compat_symbol (libc, __setcontext_stub, setcontext, GLIBC_2_0)
79
80#endif
81