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, write to the Free
17 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
21 #include <rtld-global-offsets.h>
22 #include <shlib-compat.h>
23 #include <kernel-features.h>
26 #include <asm/ptrace.h>
27 #include "ucontext_i.h"
29 #define __CONTEXT_FUNC_NAME __swapcontext
30 #define __CONTEXT_ENABLE_FPRS 1
31 #define __CONTEXT_ENABLE_VRS 1
33 /* Size of ucontext in GLIBC_2.3.4 and later. */
34 #define _UC_SIZE_2_3_4 1184
36 #ifdef __ASSUME_SWAPCONTEXT_SYSCALL
40 DO_CALL (SYS_ify (swapcontext));
42 /* the kernel does not set the return code for the success case */
46 b __syscall_error@local
49 # include "swapcontext-common.S"
52 versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
54 #if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
58 # undef __CONTEXT_FUNC_NAME
59 # define __CONTEXT_FUNC_NAME __novec_swapcontext
60 # undef __CONTEXT_ENABLE_VRS
62 # include "swapcontext-common.S"
66 compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3)
70 #if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
73 # include <bits/errno.h>
76 ENTRY (__swapcontext_stub)
78 b __syscall_error@local
79 END (__swapcontext_stub)
82 compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1)