1/* 2 * Copyright (c) 1999-2015 Apple Inc. All rights reserved. 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 33#if defined(__i386__) 34 35/* 36 * i386 needs custom assembly to transform the return from syscalls 37 * into a proper stack for a function call out to cerror{,_nocancel}. 38 */ 39 40LABEL(tramp_cerror) 41 mov %esp, %edx 42 andl $0xfffffff0, %esp 43 subl $16, %esp 44 movl %edx, 4(%esp) 45 movl %eax, (%esp) 46 CALL_EXTERN(_cerror) 47 movl 4(%esp), %esp 48 ret 49 50LABEL(tramp_cerror_nocancel) 51 mov %esp, %edx 52 andl $0xfffffff0, %esp 53 subl $16, %esp 54 movl %edx, 4(%esp) 55 movl %eax, (%esp) 56 CALL_EXTERN(_cerror_nocancel) 57 movl 4(%esp), %esp 58 ret 59 60LABEL(__sysenter_trap) 61 popl %edx 62 movl %esp, %ecx 63 sysenter 64 65 .globl _i386_get_ldt 66 ALIGN 67_i386_get_ldt: 68 movl $6,%eax 69 MACHDEP_SYSCALL_TRAP 70 jnb 2f 71 jmp tramp_cerror 722: ret 73 74 75 .globl _i386_set_ldt 76 ALIGN 77_i386_set_ldt: 78 movl $5,%eax 79 MACHDEP_SYSCALL_TRAP 80 jnb 2f 81 jmp tramp_cerror 822: ret 83 84 ALIGN 85 .globl __thread_set_tsd_base 86__thread_set_tsd_base: 87 pushl 4(%esp) 88 pushl $0 89 movl $3,%eax 90 MACHDEP_SYSCALL_TRAP 91 addl $8,%esp 92 ret 93 94#elif defined(__x86_64__) 95 96 .globl _i386_get_ldt 97 ALIGN 98_i386_get_ldt: 99 movl $SYSCALL_CONSTRUCT_MDEP(6), %eax 100 MACHDEP_SYSCALL_TRAP 101 jnb 2f 102 movq %rax, %rdi 103 jmp _cerror 1042: ret 105 106 107 .globl _i386_set_ldt 108 ALIGN 109_i386_set_ldt: 110 movl $SYSCALL_CONSTRUCT_MDEP(5), %eax 111 MACHDEP_SYSCALL_TRAP 112 jnb 2f 113 movq %rax, %rdi 114 jmp _cerror 1152: ret 116 117 ALIGN 118 .globl __thread_set_tsd_base 119__thread_set_tsd_base: 120 movl $0, %esi // 0 as the second argument 121 movl $ SYSCALL_CONSTRUCT_MDEP(3), %eax // Machine-dependent syscall number 3 122 MACHDEP_SYSCALL_TRAP 123 ret 124 125#elif defined(__arm__) 126 127 .align 2 128 .globl __thread_set_tsd_base 129__thread_set_tsd_base: 130 mov r3, #2 131 mov r12, #0x80000000 132 swi #SWI_SYSCALL 133 bx lr 134 135#elif defined(__arm64__) 136 137 .align 2 138 .globl __thread_set_tsd_base 139__thread_set_tsd_base: 140 mov x3, #2 141 mov x16, #0x80000000 142 svc #SWI_SYSCALL 143 ret 144 145#else 146#error unknown architecture 147#endif 148 149.subsections_via_symbols 150