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- /*-
- * 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 are permitted
- * provided that: (1) source distributions retain this entire copyright
- * notice and comment, and (2) distributions including binaries display
- * the following acknowledgement: ``This product includes software
- * developed by the University of California, Berkeley and its contributors''
- * in the documentation or other materials provided with the distribution
- * and in all advertising materials mentioning features or use of this
- * software. 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- */
-
- #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,
- * The previous signal state is NOT restored.
- */
-
- #include "DEFS.h"
-
- ENTRY(_setjmp)
- movl sp@(4),a0 /* save area pointer */
- clrl a0@+ /* no old onstack */
- clrl a0@+ /* no old sigmask */
- movl sp,a0@+ /* save old SP */
- movl a5,a0@+ /* save old FP */
- clrl a0@+ /* no old AP */
- movl sp@,a0@+ /* save old PC */
- clrl a0@+ /* clear PS */
- moveml d2-d7/a2-a4/a6,a0@ /* save other non-scratch regs */
- clrl d0 /* return zero */
- rts
-
- ENTRY(_longjmp)
- movl sp@(4),a0 /* save area pointer */
- addql #8,a0 /* skip onstack/sigmask */
- tstl a0@ /* 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:
- movl a0@+,sp /* restore SP */
- movl a0@+,a5 /* restore FP */
- addql #4,a0 /* skip AP */
- movl a0@+,sp@ /* restore PC */
- moveml a0@(4),d2-d7/a2-a4/a6 /* restore non-scratch regs */
- rts
-
- botch:
- jsr _longjmperror
- stop #0
-