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
|
/* POSIX.1 sigaction call for Linux/SPARC.
Copyright (C) 1997-2000,2002,2003,2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx), 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Ported to uClibc from glibc: 090520:
Jan Buchholz, KIP, Uni Heidelberg <jan.buchholz@kip.uni-heidelberg.de>
Austin Foxley, Ceton Corporation <austinf@cetoncorp.com>
*/
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <sys/syscall.h>
#include <bits/kernel_sigaction.h>
_syscall5(int, rt_sigaction, int, a, int, b, int, c, int, d, int, e)
static void __rt_sigreturn_stub(void);
static void __sigreturn_stub(void);
int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
{
int ret;
struct sigaction kact, koact;
unsigned long stub = 0;
if (act) {
kact.sa_handler = act->sa_handler;
memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
if (((kact.sa_flags = act->sa_flags) & SA_SIGINFO) != 0)
stub = (unsigned long) &__rt_sigreturn_stub;
else
stub = (unsigned long) &__sigreturn_stub;
stub -= 8;
kact.sa_restorer = NULL;
}
/* XXX The size argument hopefully will have to be changed to the
* real size of the user-level sigset_t. */
ret = INLINE_SYSCALL (rt_sigaction, 5, sig, act ? &kact : 0,
oact ? &koact : 0, stub, _NSIG / 8);
if (oact && ret >= 0) {
oact->sa_handler = koact.sa_handler;
memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
oact->sa_flags = koact.sa_flags;
oact->sa_restorer = koact.sa_restorer;
}
return ret;
}
#ifndef LIBC_SIGACTION
weak_alias(__libc_sigaction,sigaction)
libc_hidden_weak(sigaction)
#endif
static void
__rt_sigreturn_stub(void)
{
__asm__(
"mov %0, %%g1\n\t"
"ta 0x10\n\t"
: /* no outputs */
: "i" (__NR_rt_sigreturn)
);
}
static void
__sigreturn_stub(void)
{
__asm__(
"mov %0, %%g1\n\t"
"ta 0x10\n\t"
: /* no outputs */
: "i" (__NR_sigreturn)
);
}
|
