1 /* Save current context and jump to a new context.
2 Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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.
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.
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 <http://www.gnu.org/licenses/>. */
20 #include <rtld-global-offsets.h>
21 #include <shlib-compat.h>
22 #include <kernel-features.h>
25 #include <asm/ptrace.h>
26 #include "ucontext_i.h"
28 #define __CONTEXT_FUNC_NAME __swapcontext
29 #define __CONTEXT_ENABLE_FPRS 1
30 #define __CONTEXT_ENABLE_VRS 1
32 /* Size of ucontext in GLIBC_2.3.4 and later. */
33 #define _UC_SIZE_2_3_4 1184
35 #ifdef __ASSUME_SWAPCONTEXT_SYSCALL
39 DO_CALL (SYS_ify (swapcontext));
41 /* the kernel does not set the return code for the success case */
45 b __syscall_error@local
48 # include "swapcontext-common.S"
51 versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
53 #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
57 # undef __CONTEXT_FUNC_NAME
58 # define __CONTEXT_FUNC_NAME __novec_swapcontext
59 # undef __CONTEXT_ENABLE_VRS
61 # include "swapcontext-common.S"
65 compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3)
69 #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
72 # include <bits/errno.h>
75 ENTRY (__swapcontext_stub)
77 b __syscall_error@local
78 END (__swapcontext_stub)
81 compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1)