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
|
/* Copyright (C) 1993, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#ifndef __GNUC__
#error This file uses GNU C extensions; you must compile with GCC.
#endif
/* Get the definition of `struct sigcontext'. */
#define KERNEL
#define sigvec sun_sigvec
#define sigstack sun_sigstack
#define sigcontext sun_sigcontext
#include "/usr/include/sys/signal.h"
#undef sigvec
#undef sigstack
#undef sigcontext
#undef NSIG
#undef SIGABRT
#undef SIGCLD
#undef SV_ONSTACK
#undef SV_RESETHAND
#undef SV_INTERRUPT
#undef SA_ONSTACK
#undef SA_NOCLDSTOP
#undef SIG_ERR
#undef SIG_DFL
#undef SIG_IGN
#undef sigmask
#undef SIG_BLOCK
#undef SIG_UNBLOCK
#undef SIG_SETMASK
#include <signal.h>
#include <stddef.h>
#include <errno.h>
/* Defined in __sigvec.S. */
extern int __raw_sigvec (int sig, const struct sigvec *vec,
struct sigvec *ovec);
/* User-specified signal handlers. */
#define mytramp 1
#ifdef mytramp
static __sighandler_t handlers[NSIG];
#else
#define handlers _sigfunc
extern __sighandler_t _sigfunc[];
#endif
#if mytramp
/* Handler for all signals that are handled by a user-specified function.
Saves and restores the general regs %g2-%g7, the %y register, and
all the FPU regs (including %fsr), around calling the user's handler. */
static void
trampoline (sig, code, context, addr)
int sig;
int code;
struct sigcontext *context;
void *addr;
{
int save[4];
/* Save the call-clobbered registers. */
asm volatile ("movem%.l d0-d1/a0-a1, %0" : : "m" (save[0]));
/* XXX should save/restore FP regs */
/* Call the user's handler. */
(*((void (*) __P ((int sig, int code, struct sigcontext *context,
PTR addr))) handlers[sig]))
(sig, code, context, addr);
/* Restore the call-clobbered registers. */
asm volatile ("movem%.l %0, d0-d1/a0-a1" : : "g" (save[0]) :
"d0", "d1", "a0", "a1");
__sigreturn (context);
}
#endif
int
__sigvec (sig, vec, ovec)
int sig;
const struct sigvec *vec;
struct sigvec *ovec;
{
#ifndef mytramp
extern void _sigtramp (int);
#define trampoline _sigtramp
#endif
struct sigvec myvec;
int mask;
__sighandler_t ohandler;
if (sig <= 0 || sig >= NSIG)
{
__set_errno (EINVAL);
return -1;
}
mask = __sigblock(sigmask(sig));
ohandler = handlers[sig];
if (vec != NULL &&
vec->sv_handler != SIG_IGN && vec->sv_handler != SIG_DFL)
{
handlers[sig] = vec->sv_handler;
myvec = *vec;
myvec.sv_handler = trampoline;
vec = &myvec;
}
if (__raw_sigvec(sig, vec, ovec) < 0)
{
int save = errno;
(void) __sigsetmask(mask);
errno = save;
return -1;
}
if (ovec != NULL && ovec->sv_handler == trampoline)
ovec->sv_handler = ohandler;
(void) __sigsetmask(mask);
return 0;
}
|
