| | 1 | /* |
| | 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. Please obtain a copy of the License at |
| | 10 | * http://www.opensource.apple.com/apsl/ and read it before using this |
| | 11 | * file. |
| | 12 | * |
| | 13 | * The Original Code and all software distributed under the License are |
| | 14 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 15 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 16 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 17 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 18 | * Please see the License for the specific language governing rights and |
| | 19 | * limitations under the License. |
| | 20 | * |
| | 21 | * @APPLE_LICENSE_HEADER_END@ |
| | 22 | */ |
| | 23 | /* |
| | 24 | * Copyright (c) 1998 Apple Computer, Inc. All rights reserved. |
| | 25 | * |
| | 26 | * File: sys/ppc/longjmp.s |
| | 27 | * |
| | 28 | * Implements siglongjmp(), longjmp(), _longjmp() |
| | 29 | * |
| | 30 | * NOTE: Scatterloading this file will BREAK the functions. |
| | 31 | * |
| | 32 | * History: |
| | 33 | * 30-Aug-1998 Umesh Vaishampayan (umeshv@apple.com) |
| | 34 | * Created. Derived from _setjmp.s, setjmp.c and setjmp.s |
| | 35 | */ |
| | 36 | |
| | 37 | /* We use mode-independent "g" opcodes such as "stg", and/or |
| | 38 | * mode-independent macros such as MI_GET_ADDRESS. These expand |
| | 39 | * into word operations when targeting __ppc__, and into doubleword |
| | 40 | * operations when targeting __ppc64__. |
| | 41 | */ |
| | 42 | #include <architecture/ppc/mode_independent_asm.h> |
| | 43 | |
| | 44 | #include "SYS.h" |
| | 45 | #include "_setjmp.h" |
| | 46 | |
| | 47 | /* |
| | 48 | * longjmp routines |
| | 49 | */ |
| | 50 | |
| | 51 | /* void siglongjmp(sigjmp_buf env, int val); */ |
| | 52 | |
| | 53 | MI_ENTRY_POINT(_siglongjmp) |
| | 54 | lg r0, JMP_SIGFLAG(r3) ; load sigflag saved by siglongjmp() |
| | 55 | cmpgi cr1,r0,0 ; this changes cr1 which is volatile |
| | 56 | beq-- cr1, L__exit ; if r0 == 0 do _longjmp() |
| | 57 | ; else *** fall through *** to longjmp() |
| | 58 | |
| | 59 | /* void longjmp(jmp_buf env, int val); */ |
| | 60 | |
| | 61 | MI_ENTRY_POINT(_longjmp) |
| | 62 | mr r30, r3 ; preserve args across _sigsetmask |
| | 63 | mr r31, r4 |
| | 64 | |
| | 65 | /* NB: this code assumes the signal mask is an int. Change the "lwz" below |
| | 66 | * if not. The JMP_sig field is already 8 bytes in the jmpbuf. |
| | 67 | */ |
| | 68 | lwz r3, JMP_sig(r3) ; restore the signal mask |
| | 69 | MI_CALL_EXTERNAL(_sigsetmask) // make a (deprecated!) syscall to set the mask |
| | 70 | mr r4, r31 |
| | 71 | mr r3, r30 |
| | 72 | L__exit: |
| | 73 | MI_BRANCH_EXTERNAL(__longjmp) |
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