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/* Save current context and jump to a new context.
Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA
02110-1301 USA. */
#include <sysdep.h>
#include <rtld-global-offsets.h>
#include <shlib-compat.h>
#include <kernel-features.h>
#define __ASSEMBLY__
#include <asm/ptrace.h>
#include "ucontext_i.h"
#define __CONTEXT_FUNC_NAME __swapcontext
#define __CONTEXT_ENABLE_FPRS 1
#define __CONTEXT_ENABLE_VRS 1
/* Size of ucontext in GLIBC_2.3.4 and later. */
#define _UC_SIZE_2_3_4 1184
#ifdef __ASSUME_SWAPCONTEXT_SYSCALL
.section ".text";
ENTRY (__swapcontext)
li r5,_UC_SIZE_2_3_4;
DO_CALL (SYS_ify (swapcontext));
bso- cr0,1f
/* the kernel does not set the return code for the success case */
li r3,0
blr
1:
b __syscall_error@local
END(__swapcontext)
#else
# include "swapcontext-common.S"
#endif
versioned_symbol (libc, __swapcontext, swapcontext, GLIBC_2_3_4)
#if SHLIB_COMPAT (libc, GLIBC_2_3_3, GLIBC_2_3_4)
compat_text_section
# undef __CONTEXT_FUNC_NAME
# define __CONTEXT_FUNC_NAME __novec_swapcontext
# undef __CONTEXT_ENABLE_VRS
# include "swapcontext-common.S"
.previous
compat_symbol (libc, __novec_swapcontext, swapcontext, GLIBC_2_3_3)
#endif
#if SHLIB_COMPAT (libc, GLIBC_2_1, GLIBC_2_3_3)
# define _ERRNO_H 1
# include <bits/errno.h>
compat_text_section
ENTRY (__swapcontext_stub)
li r3,ENOSYS
b __syscall_error@local
END (__swapcontext_stub)
.previous
compat_symbol (libc, __swapcontext_stub, swapcontext, GLIBC_2_1)
#endif
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