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
|
/*
* Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
* Licensed under the GPL
*/
#include <signal.h>
#include <errno.h>
#include "kern_util.h"
#include "as-layout.h"
#include "task.h"
#include "sigcontext.h"
#include "skas.h"
#include "ptrace_user.h"
#include "sysdep/ptrace.h"
#include "sysdep/ptrace_user.h"
#include "os.h"
void sig_handler_common_skas(int sig, void *sc_ptr)
{
struct sigcontext *sc = sc_ptr;
union uml_pt_regs *r;
void (*handler)(int, union uml_pt_regs *);
int save_user, save_errno = errno;
/* 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.
* XXX Figure out why this is better than SA_NODEFER
*/
if(sig == SIGSEGV)
change_sig(SIGSEGV, 1);
r = TASK_REGS(get_current());
save_user = r->skas.is_user;
r->skas.is_user = 0;
if ( sig == SIGFPE || sig == SIGSEGV ||
sig == SIGBUS || sig == SIGILL ||
sig == SIGTRAP ) {
GET_FAULTINFO_FROM_SC(r->skas.faultinfo, sc);
}
change_sig(SIGUSR1, 1);
handler = sig_info[sig];
/* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
if (sig != SIGIO && sig != SIGWINCH &&
sig != SIGVTALRM && sig != SIGALRM)
unblock_signals();
handler(sig, r);
errno = save_errno;
r->skas.is_user = save_user;
}
extern int ptrace_faultinfo;
void user_signal(int sig, union uml_pt_regs *regs, int pid)
{
void (*handler)(int, union uml_pt_regs *);
int segv = ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
(sig == SIGILL) || (sig == SIGTRAP));
if (segv)
get_skas_faultinfo(pid, ®s->skas.faultinfo);
handler = sig_info[sig];
handler(sig, (union uml_pt_regs *) regs);
unblock_signals();
}
|
