Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | /* * Copyright (c) 1999-2015 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1992 NeXT Computer, Inc. All rights reserved. */ #include "SYS.h" #if defined(__i386__) /* * i386 needs custom assembly to transform the return from syscalls * into a proper stack for a function call out to cerror{,_nocancel}. */ LABEL(tramp_cerror) mov %esp, %edx andl $0xfffffff0, %esp subl $16, %esp movl %edx, 4(%esp) movl %eax, (%esp) CALL_EXTERN(_cerror) movl 4(%esp), %esp ret LABEL(tramp_cerror_nocancel) mov %esp, %edx andl $0xfffffff0, %esp subl $16, %esp movl %edx, 4(%esp) movl %eax, (%esp) CALL_EXTERN(_cerror_nocancel) movl 4(%esp), %esp ret LABEL(__sysenter_trap) popl %edx movl %esp, %ecx sysenter .globl _i386_get_ldt ALIGN _i386_get_ldt: movl $6,%eax MACHDEP_SYSCALL_TRAP jnb 2f jmp tramp_cerror 2: ret .globl _i386_set_ldt ALIGN _i386_set_ldt: movl $5,%eax MACHDEP_SYSCALL_TRAP jnb 2f jmp tramp_cerror 2: ret ALIGN .globl __thread_set_tsd_base __thread_set_tsd_base: pushl 4(%esp) pushl $0 movl $3,%eax MACHDEP_SYSCALL_TRAP addl $8,%esp ret #elif defined(__x86_64__) .globl _i386_get_ldt ALIGN _i386_get_ldt: movl $6,%eax MACHDEP_SYSCALL_TRAP jnb 2f movq %rax, %rdi jmp _cerror 2: ret .globl _i386_set_ldt ALIGN _i386_set_ldt: movl $5,%eax MACHDEP_SYSCALL_TRAP jnb 2f movq %rax, %rdi jmp _cerror 2: ret ALIGN .globl __thread_set_tsd_base __thread_set_tsd_base: movl $0, %esi // 0 as the second argument movl $ SYSCALL_CONSTRUCT_MDEP(3), %eax // Machine-dependent syscall number 3 MACHDEP_SYSCALL_TRAP ret #elif defined(__arm__) .align 2 .globl __thread_set_tsd_base __thread_set_tsd_base: mov r3, #2 mov r12, #0x80000000 swi #SWI_SYSCALL bx lr #elif defined(__arm64__) .align 2 .globl __thread_set_tsd_base __thread_set_tsd_base: mov x3, #2 mov x16, #0x80000000 svc #SWI_SYSCALL ret #else #error unknown architecture #endif .subsections_via_symbols |