1 /* $NetBSD: rtld_start.S,v 1.9 2003/03/02 22:56:14 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 Christos Zoulas 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>
37 .type .rtld_start,@function
39 subl $8,%esp # make room of obj_main and exit proc
40 pushl %ebx # save ps_strings
45 leal _DYNAMIC-1b(%edx),%ecx # &_DYNAMIC
47 subl _GLOBAL_OFFSET_TABLE_-1b(%edx),%ebx
49 pushl %ebx # relocbase
50 pushl %ecx # &_DYNAMIC
51 call _rtld_relocate_nonplt_self@PLT
53 leal 12(%esp),%eax # &cleanup
54 pushl %ebx # relocbase
56 call _rtld@PLT # _rtld(sp, relocbase)
58 addl $16,%esp # pop args
60 popl %ebx # %ebx = ps_strings
61 popl %edx # %edx = cleanup
62 popl %ecx # %ecx = obj_main
66 .globl _rtld_bind_start
67 .type _rtld_bind_start,@function
68 _rtld_bind_start: # (obj, reloff)
69 pushf # save registers
74 pushl 20(%esp) # Copy of reloff
75 pushl 20(%esp) # Copy of obj
76 call _rtld_bind@PLT # Call the binder
77 addl $8,%esp # pop binder args
78 movl %eax,20(%esp) # Store function to be called in obj
85 leal 4(%esp),%esp # Discard reloff, do not change eflags