minix/lib/libc/arch/x86_64/gen/__setjmp14.S

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/* $NetBSD: __setjmp14.S,v 1.2 2013/09/12 15:36:16 joerg Exp $ */
/*
* Copyright (c) 2001 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Frank van der Linden for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#include <machine/setjmp.h>
#if defined(LIBC_SCCS)
RCSID("$NetBSD: __setjmp14.S,v 1.2 2013/09/12 15:36:16 joerg Exp $")
#endif
/*
* C library -- _setjmp, _longjmp
*
* longjmp(a,v)
* will generate a "return(v)" from the last call to
* setjmp(a)
* by restoring registers from the stack.
* The previous signal state is restored.
*/
ENTRY(__setjmp14)
movq (%rsp),%r11
movq %rbx,(_JB_RBX * 8)(%rdi)
movq %rbp,(_JB_RBP * 8)(%rdi)
movq %r12,(_JB_R12 * 8)(%rdi)
movq %r13,(_JB_R13 * 8)(%rdi)
movq %r14,(_JB_R14 * 8)(%rdi)
movq %r15,(_JB_R15 * 8)(%rdi)
movq %rsp,(_JB_RSP * 8)(%rdi)
movq %r11,(_JB_PC * 8)(%rdi)
leaq (_JB_SIGMASK * 8)(%rdi),%rdx
xorl %edi,%edi
xorq %rsi,%rsi
#ifdef __PIC__
call PIC_PLT(_C_LABEL(__sigprocmask14))
#else
call _C_LABEL(__sigprocmask14)
#endif
2: xorl %eax,%eax
ret
ENTRY(__longjmp14)
movq %rdi,%r12
movl %esi,%r8d
leaq (_JB_SIGMASK * 8)(%rdi),%rsi
movl $3,%edi /* SIG_SETMASK */
xorq %rdx,%rdx
pushq %r8
#ifdef __PIC__
call PIC_PLT(_C_LABEL(__sigprocmask14))
#else
call _C_LABEL(__sigprocmask14)
#endif
popq %r8
movq (_JB_RBX * 8)(%r12),%rbx
movq (_JB_RBP * 8)(%r12),%rbp
movq (_JB_R13 * 8)(%r12),%r13
movq (_JB_R14 * 8)(%r12),%r14
movq (_JB_R15 * 8)(%r12),%r15
movq (_JB_RSP * 8)(%r12),%rsp
movq (_JB_PC * 8)(%r12),%r11
movq (_JB_R12 * 8)(%r12),%r12
movl %r8d,%eax
testl %eax,%eax
jnz 1f
incl %eax
1: movq %r11,0(%rsp)
ret