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author | msmith <msmith@FreeBSD.org> | 1998-11-04 00:23:18 +0000 |
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committer | msmith <msmith@FreeBSD.org> | 1998-11-04 00:23:18 +0000 |
commit | e29cc743ca6f306c0f53a54c8bb57e6d3e7e53fe (patch) | |
tree | 85dbc861f90f7fcd32aa8ec9ec463954081b4f80 /lib/libstand/i386 | |
parent | 6332255de8f2bc4fcc64b2e891b8f1dcb3dc6612 (diff) | |
download | FreeBSD-src-e29cc743ca6f306c0f53a54c8bb57e6d3e7e53fe.zip FreeBSD-src-e29cc743ca6f306c0f53a54c8bb57e6d3e7e53fe.tar.gz |
Move setjmp/longjmp implementations here from libc; no signal handling
in libstand, only for i386 until I locate an alpha setjmp/longjmp.
Minimal 64-bit gcc integer support for i386. This is kinda nasty, and
should be revisited once we decide whether the bootblocks need
quad arithmetic.
Diffstat (limited to 'lib/libstand/i386')
-rw-r--r-- | lib/libstand/i386/setjmp.S | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/lib/libstand/i386/setjmp.S b/lib/libstand/i386/setjmp.S new file mode 100644 index 0000000..6bd0497 --- /dev/null +++ b/lib/libstand/i386/setjmp.S @@ -0,0 +1,81 @@ +/*- + * 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. + * + * $Id$ + */ + +/* + * 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 <machine/asm.h> + +ENTRY(setjmp) + 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 + +ENTRY(longjmp) + movl 4(%esp),%edx + 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 |