diff options
Diffstat (limited to 'libc/arch-x86/bionic/setjmp.S')
| -rw-r--r-- | libc/arch-x86/bionic/setjmp.S | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/libc/arch-x86/bionic/setjmp.S b/libc/arch-x86/bionic/setjmp.S new file mode 100644 index 0000000..bcb5f9d --- /dev/null +++ b/libc/arch-x86/bionic/setjmp.S @@ -0,0 +1,93 @@ +/* $OpenBSD: setjmp.S,v 1.8 2005/08/07 11:30:38 espie Exp $ */ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * 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. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS OR CONTRIBUTORS 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> + +/* + * 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(setjmp) + PIC_PROLOGUE + pushl $0 +#ifdef PIC + call PIC_PLT(_C_LABEL(sigblock)) +#else + call _C_LABEL(sigblock) +#endif + addl $4,%esp + PIC_EPILOGUE + + movl 4(%esp),%ecx + movl 0(%esp),%edx + movl %edx, 0(%ecx) + movl %ebx, 4(%ecx) + movl %esp, 8(%ecx) + movl %ebp,12(%ecx) + movl %esi,16(%ecx) + movl %edi,20(%ecx) + movl %eax,24(%ecx) + xorl %eax,%eax + ret + +ENTRY(longjmp) + movl 4(%esp),%edx + PIC_PROLOGUE + pushl 24(%edx) +#ifdef PIC + call PIC_PLT(_C_LABEL(sigsetmask)) +#else + call _C_LABEL(sigsetmask) +#endif + addl $4,%esp + PIC_EPILOGUE + + movl 4(%esp),%edx + movl 8(%esp),%eax + movl 0(%edx),%ecx + movl 4(%edx),%ebx + movl 8(%edx),%esp + movl 12(%edx),%ebp + movl 16(%edx),%esi + movl 20(%edx),%edi + testl %eax,%eax + jnz 1f + incl %eax +1: movl %ecx,0(%esp) + ret |