projects / apple / libplatform.git / blame
| Commit | Line | Data |
|---|---|---|
| ada7c492 A |
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) 1998-2008 Apple Inc. All rights reserved. | |
| 25 | * | |
| 26 | * File: sys/arm/setjmp.s | |
| 27 | * | |
| 28 | * Implements sigsetjmp(), setjmp(), _setjmp() | |
| 29 | * | |
| 30 | */ | |
| 31 | ||
| 32 | #include <architecture/arm/asm_help.h> | |
| 33 | #include "_setjmp.h" | |
| 34 | ||
| 35 | /* | |
| 36 | * setjmp routines | |
| 37 | */ | |
| 38 | ||
| 39 | /* int sigsetjmp(sigjmp_buf env, int savemask); */ | |
| 40 | ||
| 41 | ENTRY_POINT(_sigsetjmp) | |
| 42 | str r1, [ r0, #JMP_SIGFLAG ] // save sigflag | |
| 43 | cmp r1, #0 // test if r1 is 0 | |
| 44 | beq L__exit // if r1 == 0 do _setjmp() | |
| 45 | // else *** fall through *** to setjmp() | |
| 46 | ||
| 47 | /* int setjmp(jmp_buf env); */ | |
| 48 | ||
| 49 | ENTRY_POINT(_setjmp) | |
| 50 | str lr, [ r0, #JMP_lr ] | |
| 51 | str r8, [ r0, #JMP_r8 ] | |
| 442fbc9d A |
52 | mov r8, r0 // r8 = jmp_buf |
| 53 | ||
| 54 | // Get previous sigmask | |
| 55 | mov r0, #1 // r0 = SIG_BLOCK | |
| 56 | mov r1, #0 // r1 = NULL | |
| 57 | add r2, r8, #JMP_sigmask // r2 = address to put the sigmask in | |
| 58 | CALL_EXTERNAL(_sigprocmask) // sigprocmask(SIGBLOCK, NULL, &old_mask); | |
| 59 | ||
| 60 | // Get altstack status | |
| 61 | sub sp, sp, #32 // Put a stack_t on the stack | |
| 62 | mov r0, #0 // r0 = ss = NULL | |
| 63 | mov r1, sp // r1 = oss = the place on the stack where stack_t is located | |
| 64 | CALL_EXTERNAL(___sigaltstack) // sigaltstack(NULL, oss) | |
| 65 | ldr r0, [sp, STACK_SSFLAGS] // r0 = ss flags from stack_t | |
| 66 | str r0, [r8, JMP_sigonstack] // *(r8 + JMP_sigonstack) = r0 | |
| 67 | add sp, sp, #32 // reset sp | |
| 68 | ||
| 69 | // Do the remaining register stuff | |
| ada7c492 | 70 | mov r0, r8 // restore jmp_buf ptr |
| 442fbc9d A |
71 | ldr r8, [ r0, #JMP_r8 ] |
| 72 | ldr lr, [ r0, #JMP_lr ] | |
| ada7c492 A |
73 | L__exit: |
| 74 | BRANCH_EXTERNAL(__setjmp) |