1*e83f7ba2SBen Gras/* $NetBSD: rtld_start.S,v 1.11 2010/12/05 00:56:07 joerg Exp $ */ 2*e83f7ba2SBen Gras 3*e83f7ba2SBen Gras/*- 4*e83f7ba2SBen Gras * Copyright (c) 1998, 2002 The NetBSD Foundation, Inc. 5*e83f7ba2SBen Gras * All rights reserved. 6*e83f7ba2SBen Gras * 7*e83f7ba2SBen Gras * This code is derived from software contributed to The NetBSD Foundation 8*e83f7ba2SBen Gras * by Christos Zoulas and by Charles M. Hannum. 9*e83f7ba2SBen Gras * 10*e83f7ba2SBen Gras * Redistribution and use in source and binary forms, with or without 11*e83f7ba2SBen Gras * modification, are permitted provided that the following conditions 12*e83f7ba2SBen Gras * are met: 13*e83f7ba2SBen Gras * 1. Redistributions of source code must retain the above copyright 14*e83f7ba2SBen Gras * notice, this list of conditions and the following disclaimer. 15*e83f7ba2SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 16*e83f7ba2SBen Gras * notice, this list of conditions and the following disclaimer in the 17*e83f7ba2SBen Gras * documentation and/or other materials provided with the distribution. 18*e83f7ba2SBen Gras * 19*e83f7ba2SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20*e83f7ba2SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21*e83f7ba2SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22*e83f7ba2SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23*e83f7ba2SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24*e83f7ba2SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25*e83f7ba2SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26*e83f7ba2SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27*e83f7ba2SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28*e83f7ba2SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29*e83f7ba2SBen Gras * POSSIBILITY OF SUCH DAMAGE. 30*e83f7ba2SBen Gras */ 31*e83f7ba2SBen Gras 32*e83f7ba2SBen Gras#include <machine/asm.h> 33*e83f7ba2SBen Gras 34*e83f7ba2SBen Gras .text 35*e83f7ba2SBen Gras .align 4 36*e83f7ba2SBen Gras .globl .rtld_start 37*e83f7ba2SBen Gras .hidden .rtld_start 38*e83f7ba2SBen Gras .type .rtld_start,@function 39*e83f7ba2SBen Gras.rtld_start: 40*e83f7ba2SBen Gras subl $8,%esp # make room of obj_main and exit proc 41*e83f7ba2SBen Gras pushl %ebx # save ps_strings 42*e83f7ba2SBen Gras 43*e83f7ba2SBen Gras call 1f 44*e83f7ba2SBen Gras1: 45*e83f7ba2SBen Gras popl %edx 46*e83f7ba2SBen Gras leal _DYNAMIC-1b(%edx),%ecx # &_DYNAMIC 47*e83f7ba2SBen Gras movl %ecx,%ebx 48*e83f7ba2SBen Gras subl _GLOBAL_OFFSET_TABLE_-1b(%edx),%ebx 49*e83f7ba2SBen Gras 50*e83f7ba2SBen Gras pushl %ebx # relocbase 51*e83f7ba2SBen Gras pushl %ecx # &_DYNAMIC 52*e83f7ba2SBen Gras call _rtld_relocate_nonplt_self 53*e83f7ba2SBen Gras 54*e83f7ba2SBen Gras leal 12(%esp),%eax # &cleanup 55*e83f7ba2SBen Gras pushl %ebx # relocbase 56*e83f7ba2SBen Gras pushl %eax # sp 57*e83f7ba2SBen Gras call _rtld # _rtld(sp, relocbase) 58*e83f7ba2SBen Gras 59*e83f7ba2SBen Gras addl $16,%esp # pop args 60*e83f7ba2SBen Gras 61*e83f7ba2SBen Gras popl %ebx # %ebx = ps_strings 62*e83f7ba2SBen Gras popl %edx # %edx = cleanup 63*e83f7ba2SBen Gras popl %ecx # %ecx = obj_main 64*e83f7ba2SBen Gras jmp *%eax 65*e83f7ba2SBen Gras 66*e83f7ba2SBen Gras .align 4 67*e83f7ba2SBen Gras .globl _rtld_bind_start 68*e83f7ba2SBen Gras .hidden _rtld_bind_start 69*e83f7ba2SBen Gras .type _rtld_bind_start,@function 70*e83f7ba2SBen Gras_rtld_bind_start: # (obj, reloff) 71*e83f7ba2SBen Gras pushf # save registers 72*e83f7ba2SBen Gras pushl %eax 73*e83f7ba2SBen Gras pushl %ecx 74*e83f7ba2SBen Gras pushl %edx 75*e83f7ba2SBen Gras 76*e83f7ba2SBen Gras pushl 20(%esp) # Copy of reloff 77*e83f7ba2SBen Gras pushl 20(%esp) # Copy of obj 78*e83f7ba2SBen Gras call _rtld_bind # Call the binder 79*e83f7ba2SBen Gras addl $8,%esp # pop binder args 80*e83f7ba2SBen Gras movl %eax,20(%esp) # Store function to be called in obj 81*e83f7ba2SBen Gras 82*e83f7ba2SBen Gras popl %edx 83*e83f7ba2SBen Gras popl %ecx 84*e83f7ba2SBen Gras popl %eax 85*e83f7ba2SBen Gras popf 86*e83f7ba2SBen Gras 87*e83f7ba2SBen Gras leal 4(%esp),%esp # Discard reloff, do not change eflags 88*e83f7ba2SBen Gras ret 89