NetBSD/libexec/ld.elf_so/arch/i386/rtld_start.S

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1999-02-19 13:22:14 +03:00
/* $NetBSD: rtld_start.S,v 1.3 1999/02/19 10:22:14 christos Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
.text
.align 4
.globl .rtld_start
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.type .rtld_start,@function
.rtld_start:
subl $8,%esp # make room of obj_main and exit proc
movl %esp,%eax # save stack pointer for _rtld
pushl %ebx # save ps_strings
pushl %eax
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call _rtld@PLT # _rtld(sp)
addl $4,%esp # pop args
popl %ebx # %ebx = ps_strings
popl %edx # %edx = cleanup
popl %ecx # %ecx = obj_main
jmp *%eax
.align 4
.globl _rtld_bind_start
.type _rtld_bind_start,@function
_rtld_bind_start: # (obj, reloff)
pushf # save registers
pushl %eax
pushl %ecx
pushl %edx
pushl %ebx
pushl %ebp
pushl %esi
pushl %edi
pushl %ds
pushl %es
pushl 44(%esp) # Copy of reloff
pushl 44(%esp) # Copy of obj
call _rtld_bind@PLT # Call the binder
addl $8,%esp # pop binder args
movl %eax,44(%esp) # Store function to be called in obj
popl %es # restore registers
popl %ds
popl %edi
popl %esi
popl %ebp
popl %ebx
popl %edx
popl %ecx
popl %eax
popf
leal 4(%esp),%esp # Discard reloff, do not change eflags
ret