projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 70103b53 | 1 | /*- |
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2 | * Copyright (c) 1990, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
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4 | * |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * the Systems Programming Group of the University of Utah Computer | |
| 7 | * Science Department. | |
| 8 | * | |
| c0567266 KB |
9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions | |
| 11 | * are met: | |
| 12 | * 1. Redistributions of source code must retain the above copyright | |
| 13 | * notice, this list of conditions and the following disclaimer. | |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 15 | * notice, this list of conditions and the following disclaimer in the | |
| 16 | * documentation and/or other materials provided with the distribution. | |
| 17 | * 3. All advertising materials mentioning features or use of this software | |
| 18 | * must display the following acknowledgement: | |
| 19 | * This product includes software developed by the University of | |
| 20 | * California, Berkeley and its contributors. | |
| 21 | * 4. Neither the name of the University nor the names of its contributors | |
| 22 | * may be used to endorse or promote products derived from this software | |
| 23 | * without specific prior written permission. | |
| 24 | * | |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 35 | * SUCH DAMAGE. | |
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36 | */ |
| 37 | ||
| 38 | #if defined(LIBC_SCCS) && !defined(lint) | |
| ad787160 | 39 | .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" |
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40 | #endif /* LIBC_SCCS and not lint */ |
| 41 | ||
| 42 | /* | |
| 43 | * C library -- _setjmp, _longjmp | |
| 44 | * | |
| 45 | * _longjmp(a,v) | |
| 46 | * will generate a "return(v)" from | |
| 47 | * the last call to | |
| 48 | * _setjmp(a) | |
| 49 | * by restoring registers from the stack, | |
| 50 | * The previous signal state is NOT restored. | |
| 51 | */ | |
| 52 | ||
| 53 | #include "DEFS.h" | |
| 54 | ||
| 55 | ENTRY(_setjmp) | |
| 56 | movl sp@(4),a0 /* save area pointer */ | |
| 57 | clrl a0@+ /* no old onstack */ | |
| 58 | clrl a0@+ /* no old sigmask */ | |
| 59 | movl sp,a0@+ /* save old SP */ | |
| 60 | movl a6,a0@+ /* save old FP */ | |
| 61 | clrl a0@+ /* no old AP */ | |
| 62 | movl sp@,a0@+ /* save old PC */ | |
| 63 | clrl a0@+ /* clear PS */ | |
| 64 | moveml #0x3CFC,a0@ /* save other non-scratch regs */ | |
| 65 | clrl d0 /* return zero */ | |
| 66 | rts | |
| 67 | ||
| 68 | ENTRY(_longjmp) | |
| 69 | movl sp@(4),a0 /* save area pointer */ | |
| 70 | addql #8,a0 /* skip onstack/sigmask */ | |
| 71 | tstl a0@ /* ensure non-zero SP */ | |
| 72 | jeq botch /* oops! */ | |
| 73 | movl sp@(8),d0 /* grab return value */ | |
| 74 | jne ok /* non-zero ok */ | |
| 75 | moveq #1,d0 /* else make non-zero */ | |
| 76 | ok: | |
| 77 | movl a0@+,sp /* restore SP */ | |
| 78 | movl a0@+,a6 /* restore FP */ | |
| 79 | addql #4,a0 /* skip AP */ | |
| 80 | movl a0@+,sp@ /* restore PC */ | |
| 81 | moveml a0@(4),#0x3CFC /* restore non-scratch regs */ | |
| 82 | rts | |
| 83 | ||
| 84 | botch: | |
| 85 | jsr _longjmperror | |
| 86 | stop #0 |