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- 1.1
- date 92.06.08.18.31.20; author mwild; state Exp;
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- @initial checkin
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- 1.1
- log
- @Initial revision
- @
- text
- @/*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * the Systems Programming Group of the University of Utah Computer
- * Science Department.
- *
- * 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 5.1 (Berkeley) 5/12/90"
- #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)
- subql #8,sp /* space for sigstack args/rvals */
- clrl sp@@ /* don't change it... */
- movl sp,sp@@(4) /* ...but return the current val */
- jsr _sigstack /* note: onstack returned in sp@@(4) */
- clrl sp@@ /* don't change mask, just return */
- jsr _sigblock /* old value */
- movl sp@@(4),d1 /* old onstack value */
- addql #8,sp
- movl sp@@(4),a0 /* save area pointer */
- movl d1,a0@@+ /* save old onstack value */
- movl d0,a0@@+ /* save old signal mask */
- lea sp@@(4),a1 /* adjust saved SP since we won't rts */
- movl a1,a0@@+ /* save old SP */
- movl a5,a0@@+ /* save old FP */
-
- movel 4:w,a1
- movew a1@@(0x126),a0@@(2) /* use TDNestCnt and IDNestCnt from Sysbase !*/
- movel a1@@(0x114),a1 /* ThisTask */
- movew a1@@(0x0e),a0@@ /* save task-specific flags (but tdnc and idnc) */
- lea a0@@(4),a0
-
- movl sp@@,a0@@+ /* save old PC */
- clrl a0@@+ /* clean PS */
- moveml d2-d7/a2-a4/a6,a0@@ /* save remaining non-scratch regs */
- clrl d0 /* return 0 */
- rts
-
- ENTRY(longjmp)
- movl sp@@(4),a0 /* save area pointer */
- tstl a0@@(8) /* ensure non-zero SP */
- jeq botch /* oops! */
- movl sp@@(8),d0 /* grab return value */
- jne ok /* non-zero ok */
- moveq #1,d0 /* else make non-zero */
- ok:
- moveml a0@@(28),d2-d7/a2-a4/a6 /* restore non-scratch regs */
- movl a0,sp@@- /* let sigreturn */
- jsr _sigreturn /* finish for us */
-
- botch:
- jsr _longjmperror
- stop #0
- @
-