diff options
Diffstat (limited to 'sys/lib/libkern/arch/sparc/_setjmp.S')
| -rw-r--r-- | sys/lib/libkern/arch/sparc/_setjmp.S | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/sys/lib/libkern/arch/sparc/_setjmp.S b/sys/lib/libkern/arch/sparc/_setjmp.S new file mode 100644 index 00000000000..cb42c847997 --- /dev/null +++ b/sys/lib/libkern/arch/sparc/_setjmp.S @@ -0,0 +1,94 @@ +/* $NetBSD: _setjmp.S,v 1.2 1994/10/26 06:39:54 cgd Exp $ */ + +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * 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. + * + * Header: _setjmp.s,v 1.1 91/07/06 16:45:53 torek Exp + */ + +#if defined(LIBC_SCCS) && !defined(lint) +#ifdef notdef + .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" +#endif + .asciz "$NetBSD: _setjmp.S,v 1.2 1994/10/26 06:39:54 cgd Exp $" +#endif /* LIBC_SCCS and not lint */ + +/* + * C library -- _setjmp, _longjmp + * + * _longjmp(a,v) + * will generate a "return(v?v:1)" from + * the last call to + * _setjmp(a) + * by unwinding the call stack. + * The previous signal state is NOT restored. + */ + +#include "DEFS.h" + +ENTRY(_setjmp) + std %sp, [%o0+0] /* caller's stack pointer and return pc */ + st %fp, [%o0+8] /* store caller's frame pointer */ + retl + clr %o0 ! return 0 + +ENTRY(_longjmp) + addcc %o1, %g0, %g6 ! compute v ? v : 1 in a global register + be,a 0f + mov 1, %g6 +0: + mov %o0, %g1 ! save a in another global register + ld [%g1+8], %g7 /* get caller's frame */ +1: + cmp %fp, %g7 ! compare against desired frame + bl,a 1b ! if below, + restore ! pop frame and loop + be,a 2f ! if there, + ldd [%g1+0], %o2 ! fetch return %sp and pc, and get out + +Lbotch: + call _longjmperror ! otherwise, went too far; bomb out + nop + unimp 0 + +2: + cmp %o2, %sp ! %sp must not decrease + bge,a 3f + mov %o2, %sp ! it is OK, put it in place + b,a Lbotch +3: + jmp %o3 + 8 ! success, return %g6 + mov %g6, %o0 |