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- /*
- * Copyright (c) 1983 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 5.9 (Berkeley) 6/1/90"
- #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 $8,sp # space for current struct sigstack
- pushl sp # get current values
- pushl $0 # no new values
- calls $3,_sigstack # 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
-