1 files changed, 88 insertions, 0 deletions
diff --git a/arch/arm/kernel/arthur.c b/arch/arm/kernel/arthur.c
new file mode 100644
index 000000000..9994fdd4a
--- /dev/null
+++ b/arch/arm/kernel/arthur.c
@@ -0,0 +1,88 @@
+/*
+ * Arthur personality
+ * Copyright (C) 1998 Philip Blundell
+ */
+
+#include <linux/personality.h>
+#include <linux/module.h>
+#include <linux/stddef.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+
+#include <asm/ptrace.h>
+
+/* RISC OS doesn't have many signals, and a lot of those that it does
+   have don't map easily to any Linux equivalent.  Never mind.  */
+
+#define RISCOS_SIGABRT		1
+#define RISCOS_SIGFPE		2
+#define RISCOS_SIGILL		3
+#define RISCOS_SIGINT		4
+#define RISCOS_SIGSEGV		5
+#define RISCOS_SIGTERM		6
+#define RISCOS_SIGSTAK		7
+#define RISCOS_SIGUSR1		8
+#define RISCOS_SIGUSR2		9
+#define RISCOS_SIGOSERROR	10
+
+static unsigned long riscos_to_linux_signals[32] = {
+	0,	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
+};
+
+static unsigned long linux_to_riscos_signals[32] = {
+	0,		-1,		RISCOS_SIGINT,	-1,
+       	RISCOS_SIGILL,	5,		RISCOS_SIGABRT,	7,
+	RISCOS_SIGFPE,	9,		RISCOS_SIGUSR1,	RISCOS_SIGSEGV,	
+	RISCOS_SIGUSR2,	13,		14,		RISCOS_SIGTERM,
+	16,		17,		18,		19,
+	20,		21,		22,		23,
+	24,		25,		26,		27,
+	28,		29,		30,		31
+};
+
+static void arthur_lcall7(int nr, struct pt_regs *regs)
+{
+	struct siginfo info;
+	info.si_signo = SIGSWI;
+	info.si_code = nr;
+	/* Bounce it to the emulator */
+	send_sig_info(SIGSWI, &info, current);
+}
+
+static struct exec_domain riscos_exec_domain = {
+	"Arthur",	/* name */
+	(lcall7_func)arthur_lcall7,
+	PER_RISCOS, PER_RISCOS,
+	riscos_to_linux_signals,
+	linux_to_riscos_signals,
+#ifdef MODULE
+	&__this_module,	/* No usage counter. */
+#else
+	NULL,
+#endif
+	NULL		/* Nothing after this in the list. */
+};
+
+/*
+ * We could do with some locking to stop Arthur being removed while
+ * processes are using it.
+ */
+
+#ifdef MODULE
+int init_module(void)
+#else
+int initialise_arthur(void)
+#endif
+{
+	return register_exec_domain(&riscos_exec_domain);
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	unregister_exec_domain(&riscos_exec_domain);
+}
+#endif