diff options
Diffstat (limited to 'lib/libc/i386/gen/setjmp.S')
| -rw-r--r-- | lib/libc/i386/gen/setjmp.S | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/lib/libc/i386/gen/setjmp.S b/lib/libc/i386/gen/setjmp.S new file mode 100644 index 0000000..6525a16 --- /dev/null +++ b/lib/libc/i386/gen/setjmp.S @@ -0,0 +1,113 @@ +/*- + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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. + * + * $Id$ + */ + +#if defined(LIBC_RCS) && !defined(lint) + .text + .asciz "$Id$" +#endif /* LIBC_RCS and not lint */ + +/* + * C library -- _setjmp, _longjmp + * + * longjmp(a,v) + * will generate a "return(v)" from the last call to + * setjmp(a) + * by restoring registers from the environment 'a'. + * The previous signal state is restored. + */ + +#include "DEFS.h" +#include "SYS.h" + +#ifdef _THREAD_SAFE +ENTRY(_thread_sys_setjmp) +#else +ENTRY(setjmp) +#endif + PIC_PROLOGUE + pushl $0 +#ifdef _THREAD_SAFE + call PIC_PLT(CNAME(_thread_sys_sigblock)) +#else + call PIC_PLT(CNAME(sigblock)) +#endif + popl %edx + 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) + fnstcw 28(%ecx) + xorl %eax,%eax + ret + +#ifdef _THREAD_SAFE +ENTRY(_thread_sys_longjmp) +#else +ENTRY(longjmp) +#endif + movl 4(%esp),%edx + PIC_PROLOGUE + pushl 24(%edx) +#ifdef _THREAD_SAFE + call PIC_PLT(CNAME(_thread_sys_sigsetmask)) +#else + call PIC_PLT(CNAME(sigsetmask)) /* XXX this is not reentrant */ +#endif + popl %eax + 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 + fninit + fldcw 28(%edx) + testl %eax,%eax + jnz 1f + incl %eax +1: movl %ecx,0(%esp) + ret |
