1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
/*
* 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
|
