1 /* $NetBSD: rtld_start.S,v 1.7 2002/09/12 17:18:38 mycroft Exp $ */
4 * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas and by Charles M. Hannum.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include <machine/asm.h>
33 __FBSDID("$FreeBSD$");
38 .type .rtld_start,%function
40 mov r6, sp /* save the stack pointer */
41 bic sp, sp, #7 /* align the stack pointer */
42 sub sp, sp, #8 /* make room for obj_main & exit proc */
43 mov r4, r0 /* save ps_strings */
52 sub r1, sl, r5 /* relocbase */
53 add r0, r1, r0 /* &_DYNAMIC */
54 bl _rtld_relocate_nonplt_self
57 mov r0, r6 /* load the sp the kernel gave us */
58 bl _rtld /* call the shared loader */
59 mov r3, r0 /* save entry point */
61 ldr r2, [sp, #0] /* r2 = cleanup */
62 ldr r1, [sp, #4] /* r1 = obj_main */
63 mov sp, r6 /* restore stack */
64 mov r0, r4 /* restore ps_strings */
65 mov pc, r3 /* jump to the entry point */
67 .word _GLOBAL_OFFSET_TABLE_ - (.L1+8)
68 .word _GLOBAL_OFFSET_TABLE_(GOT)
72 .globl _rtld_bind_start
73 .type _rtld_bind_start,%function
80 stmdb sp!,{r0-r4,sl,fp}
82 sub r1, ip, lr /* r1 = 4 * (n + 1) */
83 sub r1, r1, #4 /* r1 = 4 * n */
84 add r1, r1, r1 /* r1 = 8 * n */
86 ldr r0, [lr, #-4] /* get obj ptr from GOT[1] */
87 mov r4, ip /* save GOT location */
89 bl _rtld_bind /* Call the binder */
91 str r0, [r4] /* save address in GOT */
92 mov ip, r0 /* save new address */
94 ldmia sp!,{r0-r4,sl,fp,lr} /* restore the stack */
95 mov pc, ip /* jump to the new address */