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
|
/* $OpenBSD: md_init.h,v 1.15 2017/08/11 20:13:31 guenther Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* Copyright (c) 2001 Simon Burge
* All rights reserved.
*
* 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.
*/
/*
* Allocate 32 bytes for the stack frame. Store GP at SP+16 (since
* this is where code generated by the compiler for fallthru processing
* expects it to be), and the RA at SP+24.
*/
/* this is gross... */
#ifdef __ABICALLS__
#define MD_FUNCTION_PROLOGUE(entry_pt) \
" .frame $sp,32,$31 \n" \
" .set reorder \n" \
" dsubu $sp,$sp,32 \n" \
" .cpsetup $25, 16, "#entry_pt" \n" \
" sd $ra ,24($sp) \n"
#else
#define MD_FUNCTION_PROLOGUE(entry_pt) \
" dsubu $sp,$sp,32 \n" \
" sd $ra ,24($sp) \n"
#endif
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
".align 2 \n" \
".globl "#entry_pt" \n" \
".type "#entry_pt"@function \n" \
".ent "#entry_pt" \n" \
#entry_pt": \n" \
MD_FUNCTION_PROLOGUE(entry_pt) \
" /* fall thru */ \n" \
".end "#entry_pt" \n" \
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" ld $ra ,24($sp) \n" \
" # next should have been a .cpreturn \n" \
" ld $gp,16($sp) \n" \
" .set noreorder \n" \
" j $ra \n" \
" daddu $sp,$sp,32 \n" \
" .set reorder \n" \
".previous")
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" jal " #func " \n" \
".previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 3 \n" \
" .globl __start \n" \
" .ent __start \n" \
" .type __start, @function \n" \
"__start: \n" \
" lui $gp, %hi(%neg(%gp_rel(__start))) \n" \
" addiu $gp, $gp, %lo(%neg(%gp_rel(__start))) \n" \
" daddu $gp, $gp, $t9 \n" \
" move $a0, $sp \n" \
" dsrl $a1, $sp, 4 \n" /* align stack on a */ \
" dsll $sp, $a1, 4 \n" /* 16 byte boundary */ \
" move $a1, $v0 \n" \
" dla $t9, ___start \n" \
" jr $t9 \n" \
" .end __start \n" \
" .previous")
#define MD_RCRT0_START \
__asm( \
".text \n" \
" .align 3 \n" \
" .globl __start \n" \
" .ent __start \n" \
" .type __start, @function \n" \
"__start: \n" \
" dsubu $sp, $sp, 160 \n" \
" lui $gp, %hi(%neg(%gp_rel(__start))) \n" \
" addiu $gp, $gp, %lo(%neg(%gp_rel(__start))) \n" \
" daddu $gp, $gp, $t9 \n" \
" dla $s1, 1f \n" \
" bgezal $zero, 1f \n" \
"1: \n" \
" dsubu $s0, $ra, $s1 \n" \
" daddu $a0, $sp, 160 \n" \
" daddu $a1, $sp, 0 \n" \
" dla $a2, _DYNAMIC \n" \
" daddu $a2, $s0 \n" \
" dla $t9, _dl_boot_bind \n" \
" daddu $t9, $s0 \n" \
" jalr $t9 \n" \
" daddu $sp, $sp, 160 \n" \
" move $a0, $sp \n" \
" dsrl $a1, $sp, 4 \n" /* align stack on a */ \
" dsll $sp, $a1, 4 \n" /* 16 byte boundary */ \
" move $a1, $zero \n" \
" dla $t9, ___start \n" \
" jr $t9 \n" \
" .end __start \n" \
" .globl _dl_exit \n" \
" .ent _dl_exit \n" \
" .type _dl_exit, @function \n" \
"_dl_exit: \n" \
" li $v0, 1 \n" \
" syscall \n" \
" j $ra \n" \
" .end _dl_exit \n" \
" .previous")
struct kframe {
long kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
#define MD_START_ARGS struct kframe *kfp, void (*cleanup)(void)
#define MD_START_SETUP \
char **argv, **envp; \
long argc; \
\
argc = kfp->kargc; \
argv = &kfp->kargv[0]; \
envp = argv + argc + 1;
|
