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) 1995 NeXT Computer, Inc. All Rights Reserved | |
| 25 | * | |
| 26 | * HISTORY | |
| 27 | * 20-Apr-92 Bruce Martin (bmartin@next.com) | |
| 28 | * Created from M68K sources. | |
| 29 | */ | |
| 30 | ||
| 31 | /* | |
| 32 | * C library -- _setjmp, _longjmp | |
| 33 | * | |
| 34 | * _longjmp(a,v) | |
| 35 | * will generate a "return(v)" from | |
| 36 | * the last call to | |
| 37 | * _setjmp(a) | |
| 38 | * by restoring registers from the stack, | |
| 39 | * The previous signal state is NOT restored. | |
| 40 | * | |
| 41 | */ | |
| 42 | ||
| 43 | #include <architecture/i386/asm_help.h> | |
| 44 | ||
| 45 | #define JB_RBX 0 | |
| 46 | #define JB_RBP 8 | |
| 47 | #define JB_RSP 16 | |
| 48 | #define JB_R12 24 | |
| 49 | #define JB_R13 32 | |
| 50 | #define JB_R14 40 | |
| 51 | #define JB_R15 48 | |
| 52 | #define JB_RIP 56 | |
| 53 | #define JB_RFLAGS 64 | |
| 54 | #define JB_MXCSR 72 | |
| 55 | #define JB_FPCONTROL 76 | |
| 56 | #define JB_MASK 80 | |
| 57 | ||
| 58 | LEAF(__setjmp, 0) | |
| 59 | // %rdi is a jmp_buf (struct sigcontext *) | |
| 60 | ||
| 61 | // now build sigcontext | |
| 62 | movq %rbx, JB_RBX(%rdi) | |
| 63 | movq %rbp, JB_RBP(%rdi) | |
| 64 | movq %r12, JB_R12(%rdi) | |
| 65 | movq %r13, JB_R13(%rdi) | |
| 66 | movq %r14, JB_R14(%rdi) | |
| 67 | movq %r15, JB_R15(%rdi) | |
| 68 | ||
| 69 | // RIP is set to the frame return address value | |
| 70 | movq (%rsp), %rax | |
| 71 | movq %rax, JB_RIP(%rdi) | |
| 72 | // RSP is set to the frame return address plus 8 | |
| 73 | leaq 8(%rsp), %rax | |
| 74 | movq %rax, JB_RSP(%rdi) | |
| 75 | ||
| 76 | // save fp control word | |
| 77 | fnstcw JB_FPCONTROL(%rdi) | |
| 78 | ||
| 79 | // save MXCSR | |
| 80 | stmxcsr JB_MXCSR(%rdi) | |
| 81 | ||
| 82 | // return 0 | |
| 83 | xorl %eax, %eax | |
| 84 | ret | |
| 85 | ||
| 86 | ||
| 87 | LEAF(__longjmp, 0) | |
| 88 | fninit // Clear all FP exceptions | |
| 89 | // %rdi is a jmp_buf (struct sigcontext *) | |
| 90 | // %esi is the return value | |
| 91 | movl %esi, %eax | |
| 92 | testl %esi, %esi | |
| 93 | jnz 1f | |
| 94 | incl %eax | |
| 95 | ||
| 96 | // general registers | |
| 97 | 1: | |
| 98 | movq JB_RBX(%rdi), %rbx | |
| 99 | movq JB_RBP(%rdi), %rbp | |
| 100 | movq JB_RSP(%rdi), %rsp | |
| 101 | movq JB_R12(%rdi), %r12 | |
| 102 | movq JB_R13(%rdi), %r13 | |
| 103 | movq JB_R14(%rdi), %r14 | |
| 104 | movq JB_R15(%rdi), %r15 | |
| 105 | ||
| 106 | // restore FP control word | |
| 107 | fldcw JB_FPCONTROL(%rdi) | |
| 108 | ||
| 109 | // restore MXCSR | |
| 110 | ldmxcsr JB_MXCSR(%rdi) | |
| 111 | ||
| 112 | ||
| 113 | // Make sure DF is reset | |
| 114 | cld | |
| 115 | ||
| 116 | jmp *JB_RIP(%rdi) |