projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 2d21ac55 | 1 | /* |
| 316670eb | 2 | * Copyright (c) 1999-2011 Apple Inc. All rights reserved. |
| 2d21ac55 A |
3 | * |
| 4 | * @APPLE_OSREFERENCE_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. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 14 | * | |
| 15 | * Please obtain a copy of the License at | |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 25 | * | |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 27 | */ | |
| 28 | /* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved. | |
| 29 | */ | |
| 30 | ||
| 31 | #include "SYS.h" | |
| 32 | ||
| 6d2010ae | 33 | #if defined(__i386__) |
| 2d21ac55 A |
34 | |
| 35 | .globl _errno | |
| 36 | ||
| 37 | LABEL(cerror) | |
| 316670eb A |
38 | movl $0,%ecx |
| 39 | jmp 1f | |
| 40 | LABEL(cerror_nocancel) | |
| 41 | movl $1,%ecx | |
| 42 | 1: REG_TO_EXTERN(%eax, _errno) | |
| 2d21ac55 A |
43 | mov %esp,%edx |
| 44 | andl $0xfffffff0,%esp | |
| 45 | subl $16,%esp | |
| 316670eb A |
46 | movl %edx,8(%esp) |
| 47 | movl %ecx,4(%esp) | |
| 2d21ac55 A |
48 | movl %eax,(%esp) |
| 49 | CALL_EXTERN(_cthread_set_errno_self) | |
| 316670eb | 50 | movl 8(%esp),%esp |
| 2d21ac55 A |
51 | movl $-1,%eax |
| 52 | movl $-1,%edx /* in case a 64-bit value is returned */ | |
| 53 | ret | |
| 54 | ||
| 6d2010ae | 55 | LABEL(__sysenter_trap) |
| 2d21ac55 A |
56 | popl %edx |
| 57 | movl %esp, %ecx | |
| 58 | sysenter | |
| 59 | ||
| 60 | #elif defined(__x86_64__) | |
| 61 | ||
| 62 | .globl _errno | |
| 63 | ||
| 64 | LABEL(cerror) | |
| 316670eb A |
65 | /* cancelable syscall, for arg1 to _cthread_set_errno_self */ |
| 66 | movq $0,%rsi | |
| 67 | jmp 1f | |
| 68 | LABEL(cerror_nocancel) | |
| 69 | /* non-cancelable, see above. */ | |
| 70 | movq $1,%rsi | |
| 71 | 1: PICIFY(_errno) /* address -> %r11 */ | |
| 6d2010ae A |
72 | movl %eax,(%r11) |
| 73 | mov %rsp,%rdx | |
| 2d21ac55 A |
74 | andq $-16,%rsp |
| 75 | subq $16,%rsp | |
| 76 | // Preserve the original stack | |
| 77 | movq %rdx,(%rsp) | |
| 78 | movq %rax,%rdi | |
| 79 | CALL_EXTERN(_cthread_set_errno_self) | |
| 80 | // Restore the original stack | |
| 81 | movq (%rsp),%rsp | |
| 82 | movq $-1,%rax | |
| 83 | movq $-1,%rdx /* in case a 128-bit value is returned */ | |
| 84 | ret | |
| 85 | ||
| 2d21ac55 A |
86 | #else |
| 87 | #error Unsupported architecture | |
| 88 | #endif | |
| 89 | ||
| 90 | #if defined(__i386__) || defined(__x86_64__) | |
| 91 | ||
| 92 | .globl _i386_get_ldt | |
| 93 | ALIGN | |
| 94 | _i386_get_ldt: | |
| 95 | movl $6,%eax | |
| 96 | MACHDEP_SYSCALL_TRAP | |
| 97 | jnb 2f | |
| 98 | jmp cerror | |
| 99 | 2: ret | |
| 100 | ||
| 101 | ||
| 102 | .globl _i386_set_ldt | |
| 103 | ALIGN | |
| 104 | _i386_set_ldt: | |
| 105 | movl $5,%eax | |
| 106 | MACHDEP_SYSCALL_TRAP | |
| 107 | jnb 2f | |
| 108 | jmp cerror | |
| 109 | 2: ret | |
| 110 | ||
| 111 | #endif |