diff options
Diffstat (limited to 'lib/libc/sparc64/gen/_setjmp.S')
| -rw-r--r-- | lib/libc/sparc64/gen/_setjmp.S | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/lib/libc/sparc64/gen/_setjmp.S b/lib/libc/sparc64/gen/_setjmp.S new file mode 100644 index 0000000..b72d2a0 --- /dev/null +++ b/lib/libc/sparc64/gen/_setjmp.S @@ -0,0 +1,105 @@ +/* + * 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. + * + * from: Header: _setjmp.s,v 1.1 91/07/06 16:45:53 torek Exp + */ + +#if defined(LIBC_SCCS) && !defined(lint) +#if 0 + .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" +#else + RCSID("$NetBSD: _setjmp.S,v 1.4 1998/10/08 02:27:59 eeh Exp $") +#endif +#endif /* LIBC_SCCS and not lint */ + +#if defined(SYSLIBC_RCS) && !defined(lint) + .text + .asciz "$FreeBSD$" +#endif /* SYSLIBC_RCS and not lint */ + +#include <machine/asm.h> + +#include "assym.s" + + .register %g2,#ignore + .register %g3,#ignore + +/* + * 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. + */ + +ENTRY(_setjmp) + stx %sp, [%o0 + _JB_SP] + stx %o7, [%o0 + _JB_PC] + stx %fp, [%o0 + _JB_FP] + retl + clr %o0 +END(_setjmp) + +ENTRY(_longjmp) + mov 1, %g1 + movrnz %o1, %o1, %g1 ! compute v ? v : 1 + mov %o0, %g2 + ldx [%g2 + _JB_FP], %g3 ! fetch callers frame +1: cmp %fp, %g3 ! compare against desired frame + bl,a 1b ! if below, + restore ! pop frame and loop + be,a 2f ! if there, + ldx [%g2 + _JB_SP], %o0 ! fetch return %sp + +.Lbotch: + call CNAME(longjmperror) + nop + call CNAME(abort) + nop + illtrap + +2: cmp %o0, %sp ! %sp must not decrease + bge,a 3f + mov %o0, %sp ! it is OK, put it in place + b,a .Lbotch + nop +3: ldx [%g2 + _JB_PC], %o7 ! fetch return address + retl + mov %g1, %o0 ! return v ? v : 1; +END(_longjmp) |
