1/*	$NetBSD: rtld_start.S,v 1.3 1999/02/19 10:22:14 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39#include <machine/asm.h>
40
41	.text
42	.align	4
43	.globl	.rtld_start
44	.type	.rtld_start,@function
45.rtld_start:
46	subl	$8,%esp			# make room of obj_main and exit proc
47	movl	%esp,%eax		# save stack pointer for _rtld
48	pushl	%ebx			# save ps_strings
49
50	pushl	%eax
51	call	_rtld@PLT		# _rtld(sp)
52	addl	$4,%esp			# pop args
53
54	popl	%ebx			# %ebx = ps_strings
55	popl	%edx			# %edx = cleanup
56	popl	%ecx			# %ecx = obj_main
57	jmp	*%eax
58
59	.align	4
60	.globl	_rtld_bind_start
61	.type	_rtld_bind_start,@function
62_rtld_bind_start:	# (obj, reloff)
63	pushf				# save registers
64	pushl	%eax
65	pushl	%ecx
66	pushl	%edx
67	pushl	%ebx
68	pushl	%ebp
69	pushl	%esi
70	pushl	%edi
71	pushl	%ds
72	pushl	%es
73
74	pushl	44(%esp)		# Copy of reloff
75	pushl	44(%esp)		# Copy of obj
76	call	_rtld_bind@PLT		# Call the binder
77	addl	$8,%esp			# pop binder args
78	movl	%eax,44(%esp)		# Store function to be called in obj
79
80	popl	%es			# restore registers
81	popl	%ds
82	popl	%edi
83	popl	%esi
84	popl	%ebp
85	popl	%ebx
86	popl	%edx
87	popl	%ecx
88	popl	%eax
89	popf
90
91	leal	4(%esp),%esp		# Discard reloff, do not change eflags
92	ret
93