. file- and functionality-compatible with previous situation (FreeBSD csu) (with a crt1.o -> crt0.o symlink in /usr/lib) . harmonizes source with netbsd . harmonizes linker invocation (e.g. clang) with netbsd . helpful to get some arm code in there for the arm port project
88 lines
2.7 KiB
ArmAsm
88 lines
2.7 KiB
ArmAsm
/* $NetBSD: rtld_start.S,v 1.11 2010/12/05 00:56:07 joerg Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998, 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Christos Zoulas and by Charles M. Hannum.
|
|
*
|
|
* 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.
|
|
*
|
|
* 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
|
|
.hidden .rtld_start
|
|
.type .rtld_start,@function
|
|
.rtld_start:
|
|
subl $8,%esp # make room of obj_main and exit proc
|
|
pushl %ebx # save ps_strings
|
|
|
|
call 1f
|
|
1:
|
|
popl %edx
|
|
leal _DYNAMIC-1b(%edx),%ecx # &_DYNAMIC
|
|
movl %ecx,%ebx
|
|
subl _GLOBAL_OFFSET_TABLE_-1b(%edx),%ebx
|
|
|
|
pushl %ebx # relocbase
|
|
pushl %ecx # &_DYNAMIC
|
|
call _rtld_relocate_nonplt_self
|
|
|
|
leal 12(%esp),%eax # &cleanup
|
|
pushl %ebx # relocbase
|
|
pushl %eax # sp
|
|
call _rtld # _rtld(sp, relocbase)
|
|
|
|
addl $16,%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
|
|
.hidden _rtld_bind_start
|
|
.type _rtld_bind_start,@function
|
|
_rtld_bind_start: # (obj, reloff)
|
|
pushf # save registers
|
|
pushl %eax
|
|
pushl %ecx
|
|
pushl %edx
|
|
|
|
pushl 20(%esp) # Copy of reloff
|
|
pushl 20(%esp) # Copy of obj
|
|
call _rtld_bind # Call the binder
|
|
addl $8,%esp # pop binder args
|
|
movl %eax,20(%esp) # Store function to be called in obj
|
|
|
|
popl %edx
|
|
popl %ecx
|
|
popl %eax
|
|
popf
|
|
|
|
leal 4(%esp),%esp # Discard reloff, do not change eflags
|
|
ret
|