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/sched.h>
21#include <linux/init.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
39static 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
46static 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
57static 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
66static struct exec_domain arthur_exec_domain = {
67	"Arthur",	/* name */
68	arthur_lcall7,
69	PER_RISCOS, PER_RISCOS,
70	arthur_to_linux_signals,
71	linux_to_arthur_signals,
72	THIS_MODULE,
73	NULL		/* Nothing after this in the list. */
74};
75
76/*
77 * We could do with some locking to stop Arthur being removed while
78 * processes are using it.
79 */
80
81int __init arthur_init(void)
82{
83	return register_exec_domain(&arthur_exec_domain);
84}
85
86void __exit arthur_exit(void)
87{
88	unregister_exec_domain(&arthur_exec_domain);
89}
90
91module_init(arthur_init);
92module_exit(arthur_exit);
93