diff options
Diffstat (limited to 'lib/libc/arch/vax/gen/setjmp.S')
| -rw-r--r-- | lib/libc/arch/vax/gen/setjmp.S | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/lib/libc/arch/vax/gen/setjmp.S b/lib/libc/arch/vax/gen/setjmp.S new file mode 100644 index 00000000000..789b7e29963 --- /dev/null +++ b/lib/libc/arch/vax/gen/setjmp.S @@ -0,0 +1,97 @@ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) + /* .asciz "@(#)setjmp.s 8.1 (Berkeley) 6/4/93" */ + .asciz "$NetBSD: setjmp.S,v 1.1 1995/04/17 12:23:46 ragge Exp $" +#endif /* LIBC_SCCS 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 stack, + * and a struct sigcontext, see <signal.h> + */ + +#include "DEFS.h" + +ENTRY(setjmp, R6) + movl 4(ap),r6 # construct sigcontext + subl2 $12,sp # space for current struct sigstack + pushl sp # get current values + pushl $0 # no new values + calls $4,_sigaltstack # pop args plus signal stack value + movl (sp)+,(r6)+ # save onsigstack status of caller + pushl $0 + calls $1,_sigblock # get signal mask + movl r0,(r6)+ # save signal mask of caller + movl (ap),r0 + moval 4(ap)[r0],(r6)+ # save sp of caller + movl 12(fp),(r6)+ # save frame pointer of caller + movl 8(fp),(r6)+ # save argument pointer of caller + movl 16(fp),(r6)+ # save pc of caller + movpsl (r6) # save psl of caller + movw 4(fp),(r6) + clrl r0 + ret + +ENTRY(longjmp, 0) + movl 8(ap),r0 # return(v) + movl 4(ap),r1 # fetch buffer + tstl 12(r1) + beql botch +loop: + cmpl 12(r1),fp # are we there yet? + beql done + blssu botch + moval 20(fp),r2 + blbc 6(fp),1f # was r0 saved? + movl r0,(r2)+ +1: + bbc $1,6(fp),2f # was r1 saved? + movl r1,(r2) +2: + movl $loop,16(fp) + ret # pop another frame + +done: + pushl r1 # pointer to sigcontext + calls $1,_sigreturn # restore previous context + # we should never return +botch: + calls $0,_longjmperror + halt |