xref: /xnu-8020.101.4/libsyscall/custom/custom.s (revision e7776783b89a353188416a9a346c6cdb4928faad)
1*e7776783SApple OSS Distributions/*
2*e7776783SApple OSS Distributions * Copyright (c) 1999-2015 Apple Inc. All rights reserved.
3*e7776783SApple OSS Distributions *
4*e7776783SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*e7776783SApple OSS Distributions *
6*e7776783SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*e7776783SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*e7776783SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*e7776783SApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*e7776783SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*e7776783SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*e7776783SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*e7776783SApple OSS Distributions * terms of an Apple operating system software license agreement.
14*e7776783SApple OSS Distributions *
15*e7776783SApple OSS Distributions * Please obtain a copy of the License at
16*e7776783SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*e7776783SApple OSS Distributions *
18*e7776783SApple OSS Distributions * The Original Code and all software distributed under the License are
19*e7776783SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*e7776783SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*e7776783SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*e7776783SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*e7776783SApple OSS Distributions * Please see the License for the specific language governing rights and
24*e7776783SApple OSS Distributions * limitations under the License.
25*e7776783SApple OSS Distributions *
26*e7776783SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*e7776783SApple OSS Distributions */
28*e7776783SApple OSS Distributions/* Copyright (c) 1992 NeXT Computer, Inc.  All rights reserved.
29*e7776783SApple OSS Distributions */
30*e7776783SApple OSS Distributions
31*e7776783SApple OSS Distributions#include "SYS.h"
32*e7776783SApple OSS Distributions
33*e7776783SApple OSS Distributions#if defined(__i386__)
34*e7776783SApple OSS Distributions
35*e7776783SApple OSS Distributions/*
36*e7776783SApple OSS Distributions * i386 needs custom assembly to transform the return from syscalls
37*e7776783SApple OSS Distributions * into a proper stack for a function call out to cerror{,_nocancel}.
38*e7776783SApple OSS Distributions */
39*e7776783SApple OSS Distributions
40*e7776783SApple OSS DistributionsLABEL(tramp_cerror)
41*e7776783SApple OSS Distributions	mov		%esp, %edx
42*e7776783SApple OSS Distributions	andl	$0xfffffff0, %esp
43*e7776783SApple OSS Distributions	subl	$16, %esp
44*e7776783SApple OSS Distributions	movl	%edx, 4(%esp)
45*e7776783SApple OSS Distributions	movl	%eax, (%esp)
46*e7776783SApple OSS Distributions	CALL_EXTERN(_cerror)
47*e7776783SApple OSS Distributions	movl	4(%esp), %esp
48*e7776783SApple OSS Distributions	ret
49*e7776783SApple OSS Distributions
50*e7776783SApple OSS DistributionsLABEL(tramp_cerror_nocancel)
51*e7776783SApple OSS Distributions	mov		%esp, %edx
52*e7776783SApple OSS Distributions	andl	$0xfffffff0, %esp
53*e7776783SApple OSS Distributions	subl	$16, %esp
54*e7776783SApple OSS Distributions	movl	%edx, 4(%esp)
55*e7776783SApple OSS Distributions	movl	%eax, (%esp)
56*e7776783SApple OSS Distributions	CALL_EXTERN(_cerror_nocancel)
57*e7776783SApple OSS Distributions	movl	4(%esp), %esp
58*e7776783SApple OSS Distributions	ret
59*e7776783SApple OSS Distributions
60*e7776783SApple OSS DistributionsLABEL(__sysenter_trap)
61*e7776783SApple OSS Distributions	popl %edx
62*e7776783SApple OSS Distributions	movl %esp, %ecx
63*e7776783SApple OSS Distributions	sysenter
64*e7776783SApple OSS Distributions
65*e7776783SApple OSS Distributions	.globl _i386_get_ldt
66*e7776783SApple OSS Distributions	ALIGN
67*e7776783SApple OSS Distributions_i386_get_ldt:
68*e7776783SApple OSS Distributions	movl    $6,%eax
69*e7776783SApple OSS Distributions	MACHDEP_SYSCALL_TRAP
70*e7776783SApple OSS Distributions	jnb		2f
71*e7776783SApple OSS Distributions	jmp		tramp_cerror
72*e7776783SApple OSS Distributions2:	ret
73*e7776783SApple OSS Distributions
74*e7776783SApple OSS Distributions
75*e7776783SApple OSS Distributions	.globl _i386_set_ldt
76*e7776783SApple OSS Distributions	ALIGN
77*e7776783SApple OSS Distributions_i386_set_ldt:
78*e7776783SApple OSS Distributions	movl    $5,%eax
79*e7776783SApple OSS Distributions	MACHDEP_SYSCALL_TRAP
80*e7776783SApple OSS Distributions	jnb		2f
81*e7776783SApple OSS Distributions	jmp		tramp_cerror
82*e7776783SApple OSS Distributions2:	ret
83*e7776783SApple OSS Distributions
84*e7776783SApple OSS Distributions	ALIGN
85*e7776783SApple OSS Distributions	.globl __thread_set_tsd_base
86*e7776783SApple OSS Distributions__thread_set_tsd_base:
87*e7776783SApple OSS Distributions	pushl   4(%esp)
88*e7776783SApple OSS Distributions	pushl   $0
89*e7776783SApple OSS Distributions	movl    $3,%eax
90*e7776783SApple OSS Distributions	MACHDEP_SYSCALL_TRAP
91*e7776783SApple OSS Distributions	addl    $8,%esp
92*e7776783SApple OSS Distributions	ret
93*e7776783SApple OSS Distributions
94*e7776783SApple OSS Distributions#elif defined(__x86_64__)
95*e7776783SApple OSS Distributions
96*e7776783SApple OSS Distributions	.globl _i386_get_ldt
97*e7776783SApple OSS Distributions	ALIGN
98*e7776783SApple OSS Distributions_i386_get_ldt:
99*e7776783SApple OSS Distributions	movl    $SYSCALL_CONSTRUCT_MDEP(6), %eax
100*e7776783SApple OSS Distributions	MACHDEP_SYSCALL_TRAP
101*e7776783SApple OSS Distributions	jnb		2f
102*e7776783SApple OSS Distributions	movq	%rax, %rdi
103*e7776783SApple OSS Distributions	jmp		_cerror
104*e7776783SApple OSS Distributions2:	ret
105*e7776783SApple OSS Distributions
106*e7776783SApple OSS Distributions
107*e7776783SApple OSS Distributions	.globl _i386_set_ldt
108*e7776783SApple OSS Distributions	ALIGN
109*e7776783SApple OSS Distributions_i386_set_ldt:
110*e7776783SApple OSS Distributions	movl    $SYSCALL_CONSTRUCT_MDEP(5), %eax
111*e7776783SApple OSS Distributions	MACHDEP_SYSCALL_TRAP
112*e7776783SApple OSS Distributions	jnb		2f
113*e7776783SApple OSS Distributions	movq	%rax, %rdi
114*e7776783SApple OSS Distributions	jmp		_cerror
115*e7776783SApple OSS Distributions2:	ret
116*e7776783SApple OSS Distributions
117*e7776783SApple OSS Distributions	ALIGN
118*e7776783SApple OSS Distributions	.globl __thread_set_tsd_base
119*e7776783SApple OSS Distributions__thread_set_tsd_base:
120*e7776783SApple OSS Distributions	movl	$0, %esi	// 0 as the second argument
121*e7776783SApple OSS Distributions	movl    $ SYSCALL_CONSTRUCT_MDEP(3), %eax	// Machine-dependent syscall number 3
122*e7776783SApple OSS Distributions	MACHDEP_SYSCALL_TRAP
123*e7776783SApple OSS Distributions	ret
124*e7776783SApple OSS Distributions
125*e7776783SApple OSS Distributions#elif defined(__arm__)
126*e7776783SApple OSS Distributions
127*e7776783SApple OSS Distributions	.align 2
128*e7776783SApple OSS Distributions	.globl __thread_set_tsd_base
129*e7776783SApple OSS Distributions__thread_set_tsd_base:
130*e7776783SApple OSS Distributions	mov	r3, #2
131*e7776783SApple OSS Distributions	mov	r12, #0x80000000
132*e7776783SApple OSS Distributions	swi	#SWI_SYSCALL
133*e7776783SApple OSS Distributions	bx	lr
134*e7776783SApple OSS Distributions
135*e7776783SApple OSS Distributions#elif defined(__arm64__)
136*e7776783SApple OSS Distributions
137*e7776783SApple OSS Distributions	.align 2
138*e7776783SApple OSS Distributions	.globl __thread_set_tsd_base
139*e7776783SApple OSS Distributions__thread_set_tsd_base:
140*e7776783SApple OSS Distributions	mov	x3, #2
141*e7776783SApple OSS Distributions	mov	x16, #0x80000000
142*e7776783SApple OSS Distributions	svc 	#SWI_SYSCALL
143*e7776783SApple OSS Distributions	ret
144*e7776783SApple OSS Distributions
145*e7776783SApple OSS Distributions#else
146*e7776783SApple OSS Distributions#error unknown architecture
147*e7776783SApple OSS Distributions#endif
148*e7776783SApple OSS Distributions
149*e7776783SApple OSS Distributions.subsections_via_symbols
150