[PATCH 20/22] UML - S390 preparation, sighandler interface abstraction

[PATCH 20/22] UML - S390 preparation, sighandler interface abstraction

[Jeff Dike]

From: Bodo Stroesser <bstroesser@fujitsu-siemens.com>

s390 passes parameters in registers. So the only safe way to
find out the address of signal context, error-address and
error-type (trap_no), which are passed to signal handlers as
parameters, is to declare these parameters.
So I inserted an subarch-specific macro which holds the
declaration of parameters for signal handlers.

Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>

Index: linux-2.6.11/arch/um/include/sysdep-i386/signal.h
===================================================================
--- linux-2.6.11.orig/arch/um/include/sysdep-i386/signal.h	2005-04-29 13:44:52.000000000 -0400
+++ linux-2.6.11/arch/um/include/sysdep-i386/signal.h	2005-04-29 14:38:05.000000000 -0400
@@ -8,6 +8,8 @@
 
 #include <signal.h>
 
+#define ARCH_SIGHDLR_PARAM int sig
+
 #define ARCH_GET_SIGCONTEXT(sc, sig) \
 	do sc = (struct sigcontext *) (&sig + 1); while(0)
 
Index: linux-2.6.11/arch/um/include/sysdep-x86_64/signal.h
===================================================================
--- linux-2.6.11.orig/arch/um/include/sysdep-x86_64/signal.h	2005-04-29 13:44:52.000000000 -0400
+++ linux-2.6.11/arch/um/include/sysdep-x86_64/signal.h	2005-04-29 14:38:05.000000000 -0400
@@ -6,6 +6,8 @@
 #ifndef __X86_64_SIGNAL_H_
 #define __X86_64_SIGNAL_H_
 
+#define ARCH_SIGHDLR_PARAM int sig
+
 #define ARCH_GET_SIGCONTEXT(sc, sig_addr) \
 	do { \
 		struct ucontext *__uc; \
Index: linux-2.6.11/arch/um/os-Linux/signal.c
===================================================================
--- linux-2.6.11.orig/arch/um/os-Linux/signal.c	2005-04-29 14:22:28.000000000 -0400
+++ linux-2.6.11/arch/um/os-Linux/signal.c	2005-04-29 14:38:05.000000000 -0400
@@ -8,7 +8,7 @@
 #include "mode.h"
 #include "sysdep/signal.h"
 
-void sig_handler(int sig)
+void sig_handler(ARCH_SIGHDLR_PARAM)
 {
 	struct sigcontext *sc;
 
@@ -19,7 +19,7 @@
 
 extern int timer_irq_inited;
 
-void alarm_handler(int sig)
+void alarm_handler(ARCH_SIGHDLR_PARAM)
 {
 	struct sigcontext *sc;