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