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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/* $NetBSD: asm.h,v 1.23 2020/04/17 14:19:44 joerg Exp $ */
/*
* Copyright (c) 1994 Allen Briggs
* All rights reserved.
*
* Gleaned from locore.s and sun3 asm.h which had the following copyrights:
* locore.s:
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990 The Regents of the University of California.
* sun3/include/asm.h:
* Copyright (c) 1993 Adam Glass
* Copyright (c) 1990 The Regents of the University of California.
*
* 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 University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef _ASM_H_
#define _ASM_H_
/* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */
#ifndef _LOCORE
#define _LOCORE
#endif
#include <machine/frame.h>
#ifdef __ELF__
#define _C_LABEL(name) name
#else
#ifdef __STDC__
#define _C_LABEL(name) _ ## name
#else
#define _C_LABEL(name) _/**/name
#endif
#endif
#define _ASM_LABEL(name) name
#ifdef __PIC__
/*
* PIC_PROLOGUE() is akin to the compiler generated function prologue for
* PIC code. It leaves the address of the Global Offset Table in DEST,
* clobbering register TMP in the process.
*
* We can use two code sequences. We can read the %pc or use the call
* instruction that saves the pc in %o7. Call requires the branch unit and
* IEU1, and clobbers %o7 which needs to be restored. This instruction
* sequence takes about 4 cycles due to instruction interdependence. Reading
* the pc takes 4 cycles to dispatch and is always dispatched alone. That
* sequence takes 7 cycles.
*/
#ifdef __arch64__
#define PIC_PROLOGUE(dest,tmp) \
mov %o7, tmp; \
sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \
call 0f; \
or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \
0: \
add dest,%o7,dest; \
mov tmp, %o7
#else
#define PIC_PROLOGUE(dest,tmp) \
mov %o7,tmp; 3: call 4f; nop; 4: \
sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \
add dest,%o7,dest; mov tmp,%o7
#endif
/*
* PICCY_SET() does the equivalent of a `set var, %dest' instruction in
* a PIC-like way, but without involving the Global Offset Table. This
* only works for VARs defined in the same file *and* in the text segment.
*/
#ifdef __arch64__
#define PICCY_SET(var,dest,tmp) \
3: rd %pc, tmp; add tmp,(var-3b),dest
#else
#define PICCY_SET(var,dest,tmp) \
mov %o7,tmp; 3: call 4f; nop; 4: \
add %o7,(var-3b),dest; mov tmp,%o7
#endif
#else
#define PIC_PROLOGUE(dest,tmp)
#define PICCY_OFFSET(var,dest,tmp)
#endif
#define FTYPE(x) .type x,@function
#define OTYPE(x) .type x,@object
#define _ENTRY(name) \
.align 4; .globl name; FTYPE(name); name:
#ifdef GPROF
/* see _MCOUNT_ENTRY in profile.h */
#ifdef __ELF__
#ifdef __arch64__
#define _PROF_PROLOGUE \
.data; .align 8; 1: .word 0; .word 0; \
.text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \
or %o0,%lo(1b),%o0; restore
#else
#define _PROF_PROLOGUE \
.data; .align 4; 1: .long 0; \
.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call _mcount; \
or %o0,%lo(1b),%o0; restore
#endif
#else
#ifdef __arch64__
#define _PROF_PROLOGUE \
.data; .align 8; 1: .word 0; .word 0; \
.text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \
or %o0,%lo(1b),%o0; restore
#else
#define _PROF_PROLOGUE \
.data; .align 4; 1: .long 0; \
.text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \
or %o0,%lo(1b),%o0; restore
#endif
#endif
#else
#define _PROF_PROLOGUE
#endif
#define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
#define ENTRY_NOPROFILE(name) _ENTRY(_C_LABEL(name))
#define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
#define FUNC(name) ASENTRY(name)
#define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \
OTYPE(_C_LABEL(name)); _C_LABEL(name):
#define END(y) .size y, . - y
#define ASMSTR .asciz
#ifdef __ELF__
#define RCSID(x) .pushsection ".ident","MS",@progbits,1; \
.asciz x; \
.popsection
#else
#define RCSID(name) .asciz name
#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
/*
* WARN_REFERENCES: create a warning if the specified symbol is referenced.
*/
#ifdef __ELF__
#ifdef __STDC__
#define WARN_REFERENCES(sym,msg) \
.pushsection .gnu.warning. ## sym; \
.ascii msg; \
.popsection
#else
#define WARN_REFERENCES(sym,msg) \
.pushsection .gnu.warning./**/sym; \
.ascii msg; \
.popsection
#endif /* __STDC__ */
#else
#ifdef __STDC__
#define __STRING(x) #x
#define WARN_REFERENCES(sym,msg) \
.stabs msg ## ,30,0,0,0 ; \
.stabs __STRING(_ ## sym) ## ,1,0,0,0
#else
#define __STRING(x) "x"
#define WARN_REFERENCES(sym,msg) \
.stabs msg,30,0,0,0 ; \
.stabs __STRING(_/**/sym),1,0,0,0
#endif /* __STDC__ */
#endif /* __ELF__ */
#ifdef __arch64__
#define INCR64X(what,r0,r1) \
sethi %hi(what), r0; \
ldx [r0 + %lo(what)], r1; \
inc r1; \
stx r1, [r0 + %lo(what)]
#define INCR64(what) INCR64X(what,%o0,%o1)
#else
#define INCR64X(what,r0,r1,r2) \
sethi %hi(what), r2; \
ldd [r2 + %lo(what)], r0; \
inccc r1; \
addx r0, 0, r0; \
std r0, [r2 + %lo(what)]
#define INCR64(what) INCR64X(what,%o0,%o1,%l7)
#endif
#endif /* _ASM_H_ */
|
