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
|
/* $OpenBSD: md_init.h,v 1.1 2017/01/11 13:59:02 patrick Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
*/
#ifdef __PIC__
/* This nastyness derived from gcc3 output */
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" bl " #func " \n" \
" .previous")
#else
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" adr x0, 1f \n" \
" ldr x0, [x0] \n" \
" adr lr, 2f \n" \
" br x0 \n" \
"1: .xword " #func " \n" \
"2: \n" \
" .previous")
#endif
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",%function \n" \
" .align 4 \n" \
#entry_pt": \n" \
" sub sp, sp, #16 \n" \
" str lr, [sp] \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" ldr lr, [sp] \n" \
" add sp, sp, #16 \n" \
" ret \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 0 \n" \
" .globl _start \n" \
" .globl __start \n" \
"_start: \n" \
"__start: \n" \
" mov x3, x2 /* cleanup */ \n" \
"/* Get argc/argv/envp from stack */ \n" \
" ldr x0, [sp] \n" \
" add x1, sp, #0x0008 \n" \
" add x2, x1, x0, lsl #3 \n" \
" add x2, x2, #0x0008 \n" \
" \n" \
" b ___start \n" \
".previous");
#define MD_RCRT0_START \
char **environ, *__progname; \
__asm( \
".text \n" \
" .align 0 \n" \
" .globl _start \n" \
" .globl __start \n" \
"_start: \n" \
"__start: \n" \
" mov fp, sp \n" \
" mov x0, fp \n" \
" \n" \
" sub sp, sp, #8+8+(16*8) \n" \
" add x1, sp, #8 \n" \
" \n" \
" adrp x2, :got:_DYNAMIC \n" \
" \n" \
" bl _dl_boot_bind \n" \
" \n" \
" mov sp, fp \n" \
" mov fp, #0 \n" \
" \n" \
" mov x3, #0 /* cleanup */ \n" \
"/* Get argc/argv/envp from stack */ \n" \
" ldr x0, [sp] \n" \
" add x1, sp, #0x0008 \n" \
" add x2, x1, x0, lsl #3 \n" \
" add x2, x2, #0x0008 \n" \
" \n" \
" b ___start \n" \
" \n" \
"_dl_exit: \n" \
" mov x8, #1 \n" \
" svc #0 \n" \
"_dl_printf: \n" \
" ret \n" \
".previous");
|
