projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f15e832d | 1 | /* |
| 3f6f0ccf KB |
2 | * Copyright (c) 1988, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 4afb9d15 | 4 | * |
| f15e832d KB |
5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Computer Consoles Inc. | |
| fecdfc15 | 7 | * |
| c0567266 KB |
8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| f15e832d KB |
35 | */ |
| 36 | ||
| 37 | #if defined(LIBC_SCCS) && !defined(lint) | |
| ad787160 | 38 | .asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93" |
| f15e832d | 39 | #endif /* LIBC_SCCS and not lint */ |
| 28396825 SL |
40 | |
| 41 | /* | |
| 42 | * C library -- _setjmp, _longjmp | |
| 43 | * | |
| 44 | * _longjmp(a,v) | |
| 45 | * will generate a "return(v)" from | |
| 46 | * the last call to | |
| 47 | * _setjmp(a) | |
| 48 | * by restoring registers from the stack, | |
| 49 | * The previous signal state is NOT restored. | |
| 50 | */ | |
| 51 | ||
| 52 | #include "DEFS.h" | |
| 53 | ||
| 54 | ENTRY(_setjmp, 0) | |
| 55 | movl 4(fp),r0 | |
| 56 | movl (fp),(r0) # save frame pointer of caller | |
| 57 | movl -8(fp),4(r0) # save pc of caller | |
| 58 | clrl r0 | |
| 59 | ret | |
| 60 | ||
| 61 | ENTRY(_longjmp, 0) | |
| 62 | movl 8(fp),r0 # return(v) | |
| 63 | movl 4(fp),r1 # fetch buffer | |
| 64 | tstl (r1) | |
| 65 | beql botch | |
| 66 | loop: | |
| 67 | cmpl (r1),(fp) | |
| 68 | beql done | |
| 69 | blssu botch | |
| 70 | movl $loop,-8(fp) | |
| 71 | ret # pop another frame | |
| 72 | ||
| 73 | done: | |
| 74 | cmpb *-8(fp),reiins # returning to an "rei"? | |
| 75 | bneq 1f | |
| 76 | movab 3f,-8(fp) # do return w/ psl-pc pop | |
| 77 | brw 2f | |
| 78 | 1: | |
| 79 | movab 4f,-8(fp) # do standard return | |
| 80 | 2: | |
| 81 | ret # unwind stack before signals enabled | |
| 82 | 3: | |
| 83 | addl2 $8,sp # compensate for PSL-PC push | |
| 84 | 4: | |
| 85 | jmp *4(r1) # done, return.... | |
| 86 | ||
| 87 | botch: | |
| 88 | callf $4,_longjmperror | |
| 89 | halt | |
| 90 | ||
| 91 | .data | |
| 92 | reiins: rei |