/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* This gcrt1.o module is provided as the bare minimum required to build a
* 32-bit profile executable with gcc -pg. It is installed in /usr/lib
* where it will be picked up by gcc, along with crti.o and crtn.o
*/
.ident "%Z%%M% %I% %E% SMI"
.file "gcrt1.s"
.globl _start
.globl _etext
/* global entities defined elsewhere but used here */
.globl main
.globl __fpstart
.globl _init
.globl _fini
.globl exit
.globl _exit
.globl monstartup
.weak _mcleanup
.weak _DYNAMIC
.section .data
.weak environ
.set environ,_environ
.globl _environ
.type _environ,@object
.size _environ,4
.align 4
_environ:
.4byte 0x0
.globl ___Argv
.type ___Argv,@object
.size ___Argv,4
.align 4
___Argv:
.4byte 0x0
.section .text
.align 4
/*
* C language startup routine.
* Assume that exec code has cleared the direction flag in the TSS.
* Assume that %esp is set to the addr after the last word pushed.
* The stack contains (in order): argc, argv[],envp[],...
* Assume that all of the segment registers are initialized.
*
* Allocate a NULL return address and a NULL previous %ebp as if
* there was a genuine call to _start.
* sdb stack trace shows _start(argc,argv[0],argv[1],...,envp[0],...)
*/
.type _start,@function
_start:
pushl $0
pushl $0
movl %esp,%ebp /* The first stack frame */
/*
* Check to see if there is an _mcleanup() function linked in, and if so,
* register it with atexit() as the last thing to be run by exit().
*/
pushl %edx /* save rt_do_exit for later atexit */
movl $_mcleanup,%eax
testl %eax,%eax
jz 1f
pushl %eax
call atexit
addl $4,%esp
1:
movl $_DYNAMIC,%eax
testl %eax,%eax
jz 1f
call atexit /* register rt_do_exit */
1:
addl $4,%esp
pushl $_fini
call atexit
addl $4,%esp
/* start profiling */
pushl %ebp
movl %esp,%ebp
pushl $_etext
pushl $_start
call monstartup
addl $8,%esp
popl %ebp
/*
* The following code provides almost standard static destructor handling
* for systems that do not have the modified atexit processing in their
* system libraries. It checks for the existence of the new routine
* "_get_exit_frame_monitor()", which is in libc.so when the new exit-handling
* code is there. It then check for the existence of "__Crun::do_exit_code()"
* which will be in libCrun.so whenever the code was linked with the C++
* compiler. If there is no enhanced atexit, and we do have do_exit_code,
* we register the latter with atexit. There are 5 extra slots in
* atexit, so this will still be standard conforming. Since the code
* is registered after the .fini section, it runs before the library
* cleanup code, leaving nothing for the calls to _do_exit_code_in_range
* to handle.
*
* Remove this code and the associated code in libCrun when the earliest
* system to be supported is Solaris 8.
*/
.weak _get_exit_frame_monitor
.weak __1cG__CrunMdo_exit_code6F_v_
.section .data
.align 4
__get_exit_frame_monitor_ptr:
.4byte _get_exit_frame_monitor
.type __get_exit_frame_monitor_ptr,@object
.size __get_exit_frame_monitor_ptr,4
.align 4
__do_exit_code_ptr:
.4byte __1cG__CrunMdo_exit_code6F_v_
.type __do_exit_code_ptr,@object
.size __do_exit_code_ptr,4
.section .text
lea __get_exit_frame_monitor_ptr, %eax
movl (%eax), %eax
testl %eax,%eax
jz 1f
lea __do_exit_code_ptr, %eax
movl (%eax), %eax
testl %eax, %eax
jz 1f
pushl %eax
call atexit /* atexit(__Crun::do_exit_code()) */
addl $4,%esp
1:
/*
* End of destructor handling code
*/
/*
* Calculate the location of the envp array by adding the size of
* the argv array to the start of the argv array.
*/
movl 8(%ebp),%eax /* argc */
movl _environ, %edx /* fixed bug 4302802 */
testl %edx, %edx /* check if _enviorn==0 */
jne 1f /* fixed bug 4203802 */
leal 16(%ebp,%eax,4),%edx /* envp */
movl %edx,_environ /* copy to _environ */
1:
andl $-16,%esp /* align the stack */
subl $4,%esp
pushl %edx
leal 12(%ebp),%edx /* argv */
movl %edx,___Argv
pushl %edx
pushl %eax /* argc */
call __fpstart
call _init
call main /* main(argc,argv,envp) */
addl $12,%esp
pushl %eax /* return value from main */
pushl %eax /* push it again (for _exit(), below) */
call exit
addl $4,%esp
call _exit /* if user redefined exit, call _exit */
addl $4,%esp
hlt
.size _start, .-_start