1 /* $NetBSD: rtld_start.S,v 1.8 2003/03/01 15:14:59 mycroft Exp $ */
4 * Copyright (c) 1999, 2002, 2003 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Klaus Klein 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 subql #8,%sp | storage for obj and cleanup
41 lea (%pc,_GLOBAL_OFFSET_TABLE_@GOTPC),%a0
42 lea (%pc,_DYNAMIC),%a1
46 movel %a5,-(%sp) | relocbase
47 movel %a1,-(%sp) | &_DYNAMIC
48 jbsr _rtld_relocate_nonplt_self@PLTPC
49 addql #8,%sp | pop arguments
51 movel %a5,-(%sp) | relocbase
53 jbsr _rtld@PLTPC | entry = _rtld(sp, relocbase)
54 addql #8,%sp | pop arguments
56 moveal (%sp)+,%a1 | cleanup
57 moveal (%sp)+,%a0 | obj
59 jmp (%a3) | Go for it!
60 .size .rtld_start,.-.rtld_start
63 .globl _rtld_bind_start
64 .type _rtld_bind_start,@function
66 moveml %d0-%d1/%a0-%a1,-(%sp) | preserve caller-saved registers
67 movel 20(%sp),-(%sp) | push reloff
68 movel (16+4)(%sp),-(%sp) | push obj
69 jbsr _rtld_bind@PLTPC | %a0 = _rtld_bind(obj, reloff)
70 addql #8,%sp | pop args
72 movel %a0,(16+4)(%sp) | write fake `return' address over obj
74 movel %d0,(16+4)(%sp) | write fake `return' address over obj
76 moveml (%sp)+,%d0-%d1/%a0-%a1 | restore caller-saved registers
77 addql #4,%sp | skip reloff
78 rts | `return' right into function
79 .size _rtld_bind_start,.-_rtld_bind_start