blob: 7501900f8941feecb59ed63700962c6087a54262 (
plain)
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
|
/*
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include "sysdep/ptrace.h"
#include "sysdep/sigcontext.h"
#include "user_util.h"
#include "kern_util.h"
#include "task.h"
#include "tt.h"
#include "os.h"
void sig_handler_common_tt(int sig, void *sc_ptr)
{
struct sigcontext *sc = sc_ptr;
struct tt_regs save_regs, *r;
struct signal_info *info;
int save_errno = errno, is_user;
/* This is done because to allow SIGSEGV to be delivered inside a SEGV
* handler. This can happen in copy_user, and if SEGV is disabled,
* the process will die.
*/
if(sig == SIGSEGV)
change_sig(SIGSEGV, 1);
r = &TASK_REGS(get_current())->tt;
if ( sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGILL ||
sig == SIGTRAP ) {
GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
}
save_regs = *r;
is_user = user_context(SC_SP(sc));
r->sc = sc;
if(sig != SIGUSR2)
r->syscall = -1;
info = &sig_info[sig];
if(!info->is_irq) unblock_signals();
(*info->handler)(sig, (union uml_pt_regs *) r);
if(is_user){
interrupt_end();
block_signals();
set_user_mode(NULL);
}
*r = save_regs;
errno = save_errno;
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/
|
