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
|
/* $OpenBSD: md_init.h,v 1.6 2016/03/20 02:32:39 guenther 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\"\n" \
" call " #func "\n" \
" .previous")
/*
* Align is after because we want the function to start at the first
* address of the section, but overall we want the section to be
* aligned by the align amount.
*/
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
#entry_pt": \n" \
" .align 16 \n" \
" subq $8,%rsp \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" addq $8,%rsp \n" \
" ret \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 8 \n" \
" .globl __start \n" \
" .globl _start \n" \
"_start: \n" \
"__start: \n" \
" movq %rdx,%rcx \n" \
" movq (%rsp),%rdi \n" \
" leaq 16(%rsp,%rdi,8),%rdx \n" \
" leaq 8(%rsp),%rsi \n" \
" subq $8,%rsp \n" \
" andq $~15,%rsp \n" \
" addq $8,%rsp \n" \
" jmp ___start \n" \
" .previous")
#define MD_RCRT0_START \
__asm( \
".text \n" \
" .align 8 \n" \
" .globl __start \n" \
" .type __start,@function \n" \
"_start: \n" \
"__start: \n" \
" movq %rsp, %r12 \n" \
" subq $8, %rsp \n" \
" andq $~15, %rsp \n" \
" addq $8, %rsp \n" \
" pushq %rbx \n" \
" subq $(16*8), %rsp \n" \
" leaq _DYNAMIC(%rip),%rdx \n" \
" movq %rsp, %rsi \n" \
" movq %r12, %rdi \n" \
" call _dl_boot_bind@PLT \n" \
" \n" \
" movq $0, %rcx \n" \
" movq %r12, %rsp \n" \
" movq (%rsp),%rdi \n" \
" leaq 16(%rsp,%rdi,8),%rdx \n" \
" leaq 8(%rsp),%rsi \n" \
" subq $8,%rsp \n" \
" andq $~15,%rsp \n" \
" addq $8,%rsp \n" \
" jmp ___start \n" \
" \n" \
" .global _dl_exit \n" \
" .type _dl_exit,@function \n" \
" .align 8 \n" \
"_dl_exit: \n" \
" movl $(1), %eax \n" \
" syscall \n" \
" jb 1f \n" \
" ret \n" \
"1: \n" \
" neg %rax \n" \
" ret \n" \
" .previous")
|
