ldasm.S revision 1.2 
1/*	$OpenBSD: ldasm.S,v 1.2 2004/02/09 16:47:19 drahn Exp $ */
2
3/*
4 * Copyright (c) 2004 Dale Rahn
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
19 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#define DL_DATA_SIZE	(16 * 4)	/* XXX */
30#include <machine/asm.h>
31#include <sys/syscall.h>
32#include <arm/swi.h>
33
34ENTRY(_dl_start)
35	mov	fp, sp
36	mov	r5, sp
37	mov	lr, r6				@ save lr
38	sub	sp, sp, #4+4+DL_DATA_SIZE
39	add	r7, sp, #4			@ dl_data
40
41	mov	r0, fp				@ original stack
42	mov	r1, r7				@ dl_data
43
44	bl	_dl_boot_bind
45
46	add	r0, r5, #4			@ argv
47	ldr	r1, [r5, #0x0]			@ envp
48	add	r1, r1, #2
49	add	r1, fp, r1, lsl #2
50	ldr	r2, [r7, #7*4]			@ loff from dl_data
51	mov	r3, r7				@ dl_data
52	bl	_dl_boot
53
54	mov	sp, fp
55	mov	fp, #0
56	mov	lr, r6
57
58	mov	pc, r0
59
60
61ENTRY(_dl_bind_start)
62
63	/* STUB */
64
65
66/* ld.so SYSCALLS */
67
68#define DL_SYSCALL(n) DL_SYSCALL2(n,n)
69#define DL_SYSCALL2(n,c)					\
70	.global		__CONCAT(_dl_,n)		;\
71	.type		__CONCAT(_dl_,n)%function	;\
72__CONCAT(_dl_,n):					;\
73	swi	SWI_OS_NETBSD|__CONCAT(SYS_,c)		;\
74	bcs	.L_cerr					;\
75	mov	pc, lr
76
77	.section	".text"
78	.align		4
79DL_SYSCALL(close)
80
81
82	.global		_dl_exit
83	.type		_dl_exit%function
84_dl_exit:
85	swi	SWI_OS_NETBSD|SYS_exit
86	1:
87		b 1b
88
89DL_SYSCALL(issetugid)
90DL_SYSCALL2(_syscall,__syscall)
91DL_SYSCALL(munmap)
92DL_SYSCALL(mprotect)
93DL_SYSCALL(open)
94DL_SYSCALL(read)
95DL_SYSCALL(write)
96DL_SYSCALL(stat)
97DL_SYSCALL(fstat)
98DL_SYSCALL(fcntl)
99DL_SYSCALL2(sysctl,__sysctl)
100
101DL_SYSCALL(getdirentries)
102
103	.global		_dl_sigprocmask
104	.type		_dl_sigprocmask%function
105_dl_sigprocmask:
106	teq	r1, #0
107	moveq	r0, #1
108	moveq	r1, #0
109	ldrne	r1, [r1]
110	swi	SWI_OS_NETBSD|SYS_sigprocmask
111	bcs	.L_cerr
112	teq	r2, #0
113	strne	r0, [r2]
114	mov	r0, #0
115	mov	pc, lr
116
117.L_cerr:
118	mov	r0, #0
119	sub	r0, r0, #1
120	mov	pc, lr
121