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
207
208
|
/* $NetBSD: asm.h,v 1.30 2006/01/20 22:02:40 christos Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)asm.h 5.5 (Berkeley) 5/7/91
*/
#ifndef _I386_ASM_H_
#define _I386_ASM_H_
#ifdef _KERNEL_OPT
#include "opt_multiprocessor.h"
#endif
#ifdef PIC
#define PIC_PROLOGUE \
pushl %ebx; \
call 1f; \
1: \
popl %ebx; \
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
#define PIC_EPILOGUE \
popl %ebx
#define PIC_PLT(x) x@PLT
#define PIC_GOT(x) x@GOT(%ebx)
#define PIC_GOTOFF(x) x@GOTOFF(%ebx)
#else
#define PIC_PROLOGUE
#define PIC_EPILOGUE
#define PIC_PLT(x) x
#define PIC_GOT(x) x
#define PIC_GOTOFF(x) x
#endif
#ifdef __ELF__
# define _C_LABEL(x) x
#else
# ifdef __STDC__
# define _C_LABEL(x) _ ## x
# else
# define _C_LABEL(x) _/**/x
# endif
#endif
#define _ASM_LABEL(x) x
#define CVAROFF(x, y) _C_LABEL(x) + y
#ifdef __STDC__
# define __CONCAT(x,y) x ## y
# define __STRING(x) #x
#else
# define __CONCAT(x,y) x/**/y
# define __STRING(x) "x"
#endif
/* let kernels and others override entrypoint alignment */
#if !defined(_ALIGN_TEXT) && !defined(_KERNEL)
# ifdef __ELF__
# define _ALIGN_TEXT .align 4
# else
# define _ALIGN_TEXT .align 2
# endif
#endif
#define _ENTRY(x) \
.text; _ALIGN_TEXT; .globl x; .type x,@function; x:
#ifdef _KERNEL
#if defined(MULTIPROCESSOR)
#define CPUVAR(off) %fs:__CONCAT(CPU_INFO_,off)
#else
#define CPUVAR(off) _C_LABEL(cpu_info_primary)+__CONCAT(CPU_INFO_,off)
#endif /* MULTIPROCESSOR */
/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
#ifdef __ELF__
#ifdef __STDC__
#define IDTVEC(name) \
ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
#else
#define IDTVEC(name) \
ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
#endif /* __STDC__ */
#else
#ifdef __STDC__
#define IDTVEC(name) \
ALIGN_TEXT; .globl _X ## name; .type _X ## name,@function; _X ## name:
#else
#define IDTVEC(name) \
ALIGN_TEXT; .globl _X/**/name; .type _X/**/name,@function; _X/**/name:
#endif /* __STDC__ */
#endif /* __ELF__ */
#ifdef __ELF__
#define ALIGN_DATA .align 4
#define ALIGN_TEXT .align 4,0x90 /* 4-byte boundaries, NOP-filled */
#define SUPERALIGN_TEXT .align 16,0x90 /* 16-byte boundaries better for 486 */
#else
#define ALIGN_DATA .align 2
#define ALIGN_TEXT .align 2,0x90 /* 4-byte boundaries, NOP-filled */
#define SUPERALIGN_TEXT .align 4,0x90 /* 16-byte boundaries better for 486 */
#endif /* __ELF__ */
#define _ALIGN_TEXT ALIGN_TEXT
#ifdef GPROF
#ifdef __ELF__
#define MCOUNT_ASM call _C_LABEL(__mcount)
#else /* __ELF__ */
#define MCOUNT_ASM call _C_LABEL(mcount)
#endif /* __ELF__ */
#else /* GPROF */
#define MCOUNT_ASM /* nothing */
#endif /* GPROF */
#endif /* _KERNEL */
#ifdef GPROF
# ifdef __ELF__
# define _PROF_PROLOGUE \
pushl %ebp; movl %esp,%ebp; call PIC_PLT(__mcount); popl %ebp
# else
# define _PROF_PROLOGUE \
pushl %ebp; movl %esp,%ebp; call PIC_PLT(mcount); popl %ebp
# endif
#else
# define _PROF_PROLOGUE
#endif
#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
#define NENTRY(y) _ENTRY(_C_LABEL(y))
#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
#define ASMSTR .asciz
#ifdef __ELF__
#define RCSID(x) .section ".ident"; .asciz x
#else
#define RCSID(x) .text; .asciz x
#endif
#ifdef NO_KERNEL_RCSIDS
#define __KERNEL_RCSID(_n, _s) /* nothing */
#else
#define __KERNEL_RCSID(_n, _s) RCSID(_s)
#endif
#ifdef __ELF__
#define WEAK_ALIAS(alias,sym) \
.weak alias; \
alias = sym
#endif
/*
* STRONG_ALIAS: create a strong alias.
*/
#define STRONG_ALIAS(alias,sym) \
.globl alias; \
alias = sym
#ifdef __STDC__
#define WARN_REFERENCES(sym,msg) \
.stabs msg ## ,30,0,0,0 ; \
.stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
#elif defined(__ELF__)
#define WARN_REFERENCES(sym,msg) \
.stabs msg,30,0,0,0 ; \
.stabs __STRING(sym),1,0,0,0
#else
#define WARN_REFERENCES(sym,msg) \
.stabs msg,30,0,0,0 ; \
.stabs __STRING(_/**/sym),1,0,0,0
#endif /* __STDC__ */
#endif /* !_I386_ASM_H_ */
|
