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
|
/* $OpenBSD: SYS.h,v 1.23 2016/06/16 03:21:09 guenther Exp $*/
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
*
* from: @(#)SYS.h 5.5 (Berkeley) 5/7/91
*/
#include <sys/syscall.h>
#include <machine/asm.h>
/*
* We define a hidden alias with the prefix "_libc_" for each global symbol
* that may be used internally. By referencing _libc_x instead of x, other
* parts of libc prevent overriding by the application and avoid unnecessary
* relocations.
*/
#define _HIDDEN(x) _libc_##x
#define _HIDDEN_ALIAS(x,y) \
STRONG_ALIAS(_HIDDEN(x),y); \
.hidden _HIDDEN(x)
#define _HIDDEN_FALIAS(x,y) \
_HIDDEN_ALIAS(x,y); \
.type _HIDDEN(x),@function
/*
* For functions implemented in ASM that aren't syscalls.
* END_STRONG(x) Like DEF_STRONG() in C; for standard/reserved C names
* END_WEAK(x) Like DEF_WEAK() in C; for non-ISO C names
*/
#define END_STRONG(x) END(x); _HIDDEN_FALIAS(x,x); END(_HIDDEN(x))
#define END_WEAK(x) END_STRONG(x); .weak x
#define __CONCAT(p,x) p##x
#define __ENTRY(p,x) ENTRY(__CONCAT(p,x))
#define __END(p,x) END(__CONCAT(p,x)); \
_HIDDEN_ALIAS(x,__CONCAT(p,x)); \
END(_HIDDEN(x))
#define __SYSCALLNAME(p,x) __CONCAT(p,x)
#define __ALIAS(prefix,name) WEAK_ALIAS(name,__CONCAT(prefix,name))
#ifdef __PIC__
#define CERROR __cerror#plt
#define PIC_SAVE(reg) or reg, %r25, %r0
#define PIC_RESTORE(reg) or %r25, reg, %r0
#define PIC_SETUP \
or %r11, %r0, %r1; \
or.u %r25, %r0, %hi16(.Lpic#abdiff); \
bsr.n .Lpic; \
or %r25, %r25, %lo16(.Lpic#abdiff); \
.Lpic: add %r25, %r25, %r1; \
or %r1, %r0, %r11
#if __PIC__ > 1
#define PIC_LOAD(reg,sym) \
or.u %r11, %r0, %hi16(__CONCAT(sym,#got_rel)); \
or %r11, %r11, %lo16(__CONCAT(sym,#got_rel)); \
ld reg, %r25, %r11
#define PIC_STORE(reg,sym) \
or.u %r11, %r0, %hi16(__CONCAT(sym,#got_rel)); \
or %r11, %r11, %lo16(__CONCAT(sym,#got_rel)); \
st reg, %r25, %r11
#else /* -fpic */
#define PIC_LOAD(reg,sym) \
ld %r11, %r25, __CONCAT(sym,#got_rel); \
ld reg, %r11, %r0
#define PIC_STORE(reg,sym) \
ld %r11, %r25, __CONCAT(sym,#got_rel); \
st reg, %r11, %r0
#endif
#else
#define CERROR __cerror
#endif
#define __DO_SYSCALL(x) \
or %r13, %r0, __SYSCALLNAME(SYS_,x); \
tb0 0, %r0, 450
#define __SYSCALL__NOERROR(p,x,y) \
__ENTRY(p,x); \
__ALIAS(p,x); \
__DO_SYSCALL(y)
#define __SYSCALL_HIDDEN__NOERROR(p,x,y) \
__ENTRY(p,x); \
__DO_SYSCALL(y)
#define __SYSCALL(p,x,y) \
__SYSCALL__NOERROR(p,x,y); \
br CERROR
#define __SYSCALL_HIDDEN(p,x,y) \
__SYSCALL_HIDDEN__NOERROR(p,x,y); \
br CERROR
#define __PSEUDO_NOERROR(p,x,y) \
__SYSCALL__NOERROR(p,x,y); \
or %r0, %r0, %r0; \
jmp %r1; \
__END(p,x); END(x)
#define __PSEUDO(p,x,y) \
__SYSCALL(p,x,y); \
jmp %r1; \
__END(p,x); END(x)
#define __PSEUDO_HIDDEN(p,x,y) \
__SYSCALL_HIDDEN(p,x,y); \
jmp %r1; \
__END(p,x)
/*
* System calls entry points are really named _thread_sys_{syscall},
* and weakly aliased to the name {syscall}. This allows the thread
* library to replace system calls at link time.
*/
#define SYSCALL(x) __SYSCALL(_thread_sys_,x,x)
#define RSYSCALL(x) __PSEUDO(_thread_sys_,x,x)
#define RSYSCALL_HIDDEN(x) __PSEUDO_HIDDEN(_thread_sys_,x,x)
#define PSEUDO(x,y) __PSEUDO(_thread_sys_,x,y)
#define PSEUDO_NOERROR(x,y) __PSEUDO_NOERROR(_thread_sys_,x,y)
#define SYSENTRY_HIDDEN(x) __ENTRY(_thread_sys_,x)
#define SYSENTRY(x) SYSENTRY_HIDDEN(x); \
__ALIAS(_thread_sys_,x)
#define SYSCALL_END_HIDDEN(x) __END(_thread_sys_,x)
#define SYSCALL_END(x) SYSCALL_END_HIDDEN(x); END(x)
#define ASMSTR .asciz
.globl __cerror
|
