[PATCH] mm: uml kill unused
[linux-2.6] / arch / um / kernel / trap_user.c
1 /* 
2  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
3  * Licensed under the GPL
4  */
5
6 #include <stdlib.h>
7 #include <errno.h>
8 #include <setjmp.h>
9 #include <signal.h>
10 #include <sys/time.h>
11 #include <sys/wait.h>
12 #include <asm/page.h>
13 #include <asm/unistd.h>
14 #include <asm/ptrace.h>
15 #include "init.h"
16 #include "sysdep/ptrace.h"
17 #include "sigcontext.h"
18 #include "sysdep/sigcontext.h"
19 #include "irq_user.h"
20 #include "signal_user.h"
21 #include "time_user.h"
22 #include "task.h"
23 #include "mode.h"
24 #include "choose-mode.h"
25 #include "kern_util.h"
26 #include "user_util.h"
27 #include "os.h"
28
29 void kill_child_dead(int pid)
30 {
31         kill(pid, SIGKILL);
32         kill(pid, SIGCONT);
33         do {
34                 int n;
35                 CATCH_EINTR(n = waitpid(pid, NULL, 0));
36                 if (n > 0)
37                         kill(pid, SIGCONT);
38                 else
39                         break;
40         } while(1);
41 }
42
43 void segv_handler(int sig, union uml_pt_regs *regs)
44 {
45         struct faultinfo * fi = UPT_FAULTINFO(regs);
46
47         if(UPT_IS_USER(regs) && !SEGV_IS_FIXABLE(fi)){
48                 bad_segv(*fi, UPT_IP(regs));
49                 return;
50         }
51         segv(*fi, UPT_IP(regs), UPT_IS_USER(regs), regs);
52 }
53
54 void usr2_handler(int sig, union uml_pt_regs *regs)
55 {
56         CHOOSE_MODE(syscall_handler_tt(sig, regs), (void) 0);
57 }
58
59 struct signal_info sig_info[] = {
60         [ SIGTRAP ] { .handler          = relay_signal,
61                       .is_irq           = 0 },
62         [ SIGFPE ] { .handler           = relay_signal,
63                      .is_irq            = 0 },
64         [ SIGILL ] { .handler           = relay_signal,
65                      .is_irq            = 0 },
66         [ SIGWINCH ] { .handler         = winch,
67                        .is_irq          = 1 },
68         [ SIGBUS ] { .handler           = bus_handler,
69                      .is_irq            = 0 },
70         [ SIGSEGV] { .handler           = segv_handler,
71                      .is_irq            = 0 },
72         [ SIGIO ] { .handler            = sigio_handler,
73                     .is_irq             = 1 },
74         [ SIGVTALRM ] { .handler        = timer_handler,
75                         .is_irq         = 1 },
76         [ SIGALRM ] { .handler          = timer_handler,
77                       .is_irq           = 1 },
78         [ SIGUSR2 ] { .handler          = usr2_handler,
79                       .is_irq           = 0 },
80 };
81
82 void do_longjmp(void *b, int val)
83 {
84         sigjmp_buf *buf = b;
85
86         siglongjmp(*buf, val);
87 }
88
89 /*
90  * Overrides for Emacs so that we follow Linus's tabbing style.
91  * Emacs will notice this stuff at the end of the file and automatically
92  * adjust the settings for this buffer only.  This must remain at the end
93  * of the file.
94  * ---------------------------------------------------------------------------
95  * Local variables:
96  * c-file-style: "linux"
97  * End:
98  */