diff options
Diffstat (limited to 'lib/libc/i386/gen/sigsetjmp.S')
| -rw-r--r-- | lib/libc/i386/gen/sigsetjmp.S | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/lib/libc/i386/gen/sigsetjmp.S b/lib/libc/i386/gen/sigsetjmp.S new file mode 100644 index 000000000000..0920b6da9956 --- /dev/null +++ b/lib/libc/i386/gen/sigsetjmp.S @@ -0,0 +1,127 @@ +/*- + * 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. + * 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. + * + * @(#)setjmp.s 5.1 (Berkeley) 4/23/90" + */ + +#if defined(LIBC_SCCS) && !defined(lint) + .text + .asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $" +#endif /* LIBC_SCCS and not lint */ +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +#include "SYS.h" + +/*- + * TODO: + * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, + * remove the other *jmp functions and define everything in terms + * of the renamed functions. This requires compiler support for + * the renamed functions (introduced in gcc-2.5.3; previous versions + * only supported *jmp with 0 or 1 leading underscores). + * + * Restore _all_ the registers and the signal mask atomically. Can + * use sigreturn() if sigreturn() works. + */ + +ENTRY(sigsetjmp) + movl 8(%esp),%eax + movl 4(%esp),%ecx + movl %eax,44(%ecx) + testl %eax,%eax + jz 2f + PIC_PROLOGUE +#ifdef PIC + subl $12,%esp /* make the stack 16-byte aligned */ +#endif + leal 28(%ecx), %eax + pushl %eax /* (sigset_t*)oset */ + pushl $0 /* (sigset_t*)set */ + pushl $1 /* SIG_BLOCK */ + call PIC_PLT(CNAME(_sigprocmask)) +#ifdef PIC + addl $24,%esp +#else + addl $12,%esp +#endif + PIC_EPILOGUE + movl 4(%esp),%ecx +2: 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) + fnstcw 24(%ecx) + xorl %eax,%eax + ret +END(sigsetjmp) + + WEAK_REFERENCE(__siglongjmp, siglongjmp) +ENTRY(__siglongjmp) + movl 4(%esp),%edx + cmpl $0,44(%edx) + jz 2f + PIC_PROLOGUE +#ifdef PIC + subl $12,%esp /* make the stack 16-byte aligned */ +#endif + pushl $0 /* (sigset_t*)oset */ + leal 28(%edx), %eax + pushl %eax /* (sigset_t*)set */ + pushl $3 /* SIG_SETMASK */ + call PIC_PLT(CNAME(_sigprocmask)) +#ifdef PIC + addl $24,%esp +#else + addl $12,%esp +#endif + PIC_EPILOGUE + movl 4(%esp),%edx +2: 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 24(%edx) + testl %eax,%eax + jnz 1f + incl %eax +1: movl %ecx,0(%esp) + ret +END(__siglongjmp) + + .section .note.GNU-stack,"",%progbits |