ptrace.S revision 1.2 
1/*	$NetBSD: ptrace.S,v 1.2 2001/01/09 19:47:28 bjh21 Exp $ */
2
3/*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *	from: @(#)ptrace.s	5.1 (Berkeley) 4/23/90
36 */
37
38#include "SYS.h"
39
40ENTRY(ptrace)
41#ifdef _REENTRANT
42	stmfd	sp!, {r0-r3, lr}
43	bl	_C_LABEL(__errno)
44	mov	r1, #0x00000000
45	str	r1, [r0]
46	ldmfd	sp!, {r0-r3, lr}
47#else
48	stmfd	sp!, {r0, r1}
49#ifdef PIC
50	/* Setup the GOT */
51	ldr	r0, got
52	add	r0, pc, r0
53L1:
54	ldr	r1, Lerrno
55	ldr	r1, [r0, r1]
56#else
57	ldr	r1, Lerrno
58#endif /* PIC */
59	mov	r0, #0x00000000
60	str	r0, [r1]
61	ldmfd	sp!, {r0, r1}
62#endif /* _REENTRANT */
63
64	SYSTRAP(ptrace)
65	bcs	cerror
66#ifdef __APCS_26__
67	movs	pc, lr
68#else
69	mov	pc, lr
70#endif
71
72#ifndef _REENTRANT
73#ifdef PIC
74	.align	0
75got:
76	.word	__GLOBAL_OFFSET_TABLE_ + (. - (L1+4))
77#endif /* PIC */
78
79Lerrno:
80	.word	_C_LABEL(errno)
81#endif /* !_REENTRANT */
82