1 /*
2 * linux/arch/arm/kernel/arthur.c
3 *
4 * Copyright (C) 1998, 1999, 2000, 2001 Philip Blundell
5 *
6 * Arthur personality
7 */
8
9 /*
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16 #include <linux/module.h>
17 #include <linux/personality.h>
18 #include <linux/stddef.h>
19 #include <linux/signal.h>
20 #include <linux/init.h>
21 #include <linux/sched.h>
22
23 #include <asm/ptrace.h>
24
25 /* Arthur doesn't have many signals, and a lot of those that it does
26 have don't map easily to any Linux equivalent. Never mind. */
27
28 #define ARTHUR_SIGABRT 1
29 #define ARTHUR_SIGFPE 2
30 #define ARTHUR_SIGILL 3
31 #define ARTHUR_SIGINT 4
32 #define ARTHUR_SIGSEGV 5
33 #define ARTHUR_SIGTERM 6
34 #define ARTHUR_SIGSTAK 7
35 #define ARTHUR_SIGUSR1 8
36 #define ARTHUR_SIGUSR2 9
37 #define ARTHUR_SIGOSERROR 10
38
39 static unsigned long arthur_to_linux_signals[32] = {
40 0, 1, 2, 3, 4, 5, 6, 7,
41 8, 9, 10, 11, 12, 13, 14, 15,
42 16, 17, 18, 19, 20, 21, 22, 23,
43 24, 25, 26, 27, 28, 29, 30, 31
44 };
45
46 static unsigned long linux_to_arthur_signals[32] = {
47 0, -1, ARTHUR_SIGINT, -1,
48 ARTHUR_SIGILL, 5, ARTHUR_SIGABRT, 7,
49 ARTHUR_SIGFPE, 9, ARTHUR_SIGUSR1, ARTHUR_SIGSEGV,
50 ARTHUR_SIGUSR2, 13, 14, ARTHUR_SIGTERM,
51 16, 17, 18, 19,
52 20, 21, 22, 23,
53 24, 25, 26, 27,
54 28, 29, 30, 31
55 };
56
arthur_lcall7(int nr,struct pt_regs * regs)57 static void arthur_lcall7(int nr, struct pt_regs *regs)
58 {
59 struct siginfo info;
60 info.si_signo = SIGSWI;
61 info.si_errno = nr;
62 /* Bounce it to the emulator */
63 send_sig_info(SIGSWI, &info, current);
64 }
65
66 static struct exec_domain arthur_exec_domain = {
67 .name = "Arthur",
68 .handler = arthur_lcall7,
69 .pers_low = PER_RISCOS,
70 .pers_high = PER_RISCOS,
71 .signal_map = arthur_to_linux_signals,
72 .signal_invmap = linux_to_arthur_signals,
73 .module = THIS_MODULE,
74 };
75
76 /*
77 * We could do with some locking to stop Arthur being removed while
78 * processes are using it.
79 */
80
arthur_init(void)81 static int __init arthur_init(void)
82 {
83 return register_exec_domain(&arthur_exec_domain);
84 }
85
arthur_exit(void)86 static void __exit arthur_exit(void)
87 {
88 unregister_exec_domain(&arthur_exec_domain);
89 }
90
91 module_init(arthur_init);
92 module_exit(arthur_exit);
93
94 MODULE_LICENSE("GPL");
95