projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 A |
1 | /* |
| 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 734aad71 | 6 | * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. |
| e9ce8d39 | 7 | * |
| 734aad71 A |
8 | * This file contains Original Code and/or Modifications of Original Code |
| 9 | * as defined in and that are subject to the Apple Public Source License | |
| 10 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 11 | * compliance with the License. Please obtain a copy of the License at | |
| 12 | * http://www.opensource.apple.com/apsl/ and read it before using this | |
| 13 | * file. | |
| 14 | * | |
| 15 | * The Original Code and all software distributed under the License are | |
| 16 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| e9ce8d39 A |
17 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 18 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 734aad71 A |
19 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 20 | * Please see the License for the specific language governing rights and | |
| 21 | * limitations under the License. | |
| e9ce8d39 A |
22 | * |
| 23 | * @APPLE_LICENSE_HEADER_END@ | |
| 24 | */ | |
| 25 | /* | |
| 26 | * Copyright (c) 1998 Apple Computer, Inc. All rights reserved. | |
| 27 | * | |
| 28 | * File: sys/ppc/setjmp.s | |
| 29 | * | |
| 30 | * Implements sigsetjmp(), setjmp(), _setjmp() | |
| 31 | * | |
| 32 | * NOTE: Scatterloading this file will BREAK the functions. | |
| 33 | * | |
| 34 | * History: | |
| 35 | * 30-Aug-1998 Umesh Vaishampayan (umeshv@apple.com) | |
| 36 | * Created. Derived from _setjmp.s, setjmp.c and setjmp.s | |
| 37 | */ | |
| 38 | ||
| 39 | #include "SYS.h" | |
| 40 | #include <architecture/ppc/asm_help.h> | |
| 41 | #include "_setjmp.h" | |
| 42 | ||
| 43 | /* | |
| 44 | * setjmp routines | |
| 45 | */ | |
| 46 | ||
| 47 | /* int sigsetjmp(sigjmp_buf env, int savemask); */ | |
| 48 | ||
| 49 | LEAF(_sigsetjmp) | |
| 50 | cmpwi cr1,r4,0 ; this changes cr1[EQ] which is volatile | |
| 51 | stw r4, JMP_SIGFLAG(r3) ; save the sigflag for use by siglongjmp() | |
| 52 | beq- cr1, L__setjmp ; if r4 == 0 do _setjmp() | |
| 53 | ; else *** fall through *** to setjmp() | |
| 54 | ||
| 55 | /* int setjmp(jmp_buf env); */ | |
| 56 | ||
| 57 | LEAF(_setjmp) | |
| 58 | L_setjmp: | |
| 59 | mflr r0 | |
| 60 | stw r31, JMP_r31(r3) | |
| 61 | stw r0, JMP_lr(r3) | |
| 62 | mr r31, r3 | |
| 9385eb3d A |
63 | li r3, 1 ; get the previous signal mask |
| 64 | li r4, 0 | |
| 65 | la r5, JMP_sig(r31) ; get address where previous mask needs to be | |
| 66 | CALL_EXTERN(_sigprocmask) | |
| e9ce8d39 A |
67 | mr r3, r31 |
| 68 | lwz r0, JMP_lr(r3) | |
| 69 | mtlr r0 | |
| 70 | lwz r31, JMP_r31(r3) | |
| 71 | L__setjmp: | |
| 72 | BRANCH_EXTERN(__setjmp) |