/*
* 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 $SYSCALL_CONSTRUCT_MDEP(6), %eax
MACHDEP_SYSCALL_TRAP
jnb 2f
movq %rax, %rdi
jmp _cerror
2: ret
.globl _i386_set_ldt
ALIGN
_i386_set_ldt:
movl $SYSCALL_CONSTRUCT_MDEP(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