ptrace.S revision 129202 
1/*	$NetBSD: ptrace.S,v 1.7 2003/08/07 16:42:04 agc 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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	from: @(#)ptrace.s	5.1 (Berkeley) 4/23/90
32 */
33
34#include <machine/asm.h>
35__FBSDID("$FreeBSD: head/lib/libc/arm/sys/ptrace.S 129202 2004-05-14 12:04:31Z cognet $");
36#include "SYS.h"
37
38ENTRY(ptrace)
39#ifdef _REENTRANT
40	stmfd	sp!, {r0-r3, lr}
41	sub	sp, sp, #4	/* align stack */
42	bl	PIC_SYM(_C_LABEL(__errno), PLT)
43	add	sp, sp, #4	/* unalign stack */
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, .Lgot
52	add	r0, pc, r0
53.L1:
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	PIC_SYM(CERROR, PLT)
66	mov	pc, lr
67
68#ifndef _REENTRANT
69#ifdef PIC
70	.align	0
71.Lgot:
72	.word	_C_LABEL(_GLOBAL_OFFSET_TABLE_) + (. - (.L1+4))
73#endif /* PIC */
74
75.Lerrno:
76	.word	PIC_SYM(_C_LABEL(errno), GOT)
77#endif /* !_REENTRANT */
78