uml: move sig_handler_common_skas

This patch moves sig_handler_common_skas from
arch/um/os-Linux/skas/trap.c to its only caller in
arch/um/os-Linux/signal.c.  trap.c is now empty, so it can be removed.

This is code movement only - the significant cleanup needed here is
done in the next patch.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

4 files changed, 65 insertions, 79 deletions

diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index bce2881aebd7..b9779ac5e5d7 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -292,9 +292,6 @@ extern int add_sigio_fd(int fd);
 extern int ignore_sigio_fd(int fd);
 extern void maybe_sigio_broken(int fd, int read);
 
-/* skas/trap */
-extern void sig_handler_common_skas(int sig, void *sc_ptr);
-
 /* sys-x86_64/prctl.c */
 extern int os_arch_prctl(int pid, int code, unsigned long *addr);
 
diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c
index 62a66f38a913..cde9e766b5b4 100644
--- a/arch/um/os-Linux/signal.c
+++ b/arch/um/os-Linux/signal.c
@@ -9,12 +9,74 @@
 #include <errno.h>
 #include <signal.h>
 #include <strings.h>
+#include "as-layout.h"
+#include "kern_constants.h"
 #include "kern_util.h"
 #include "os.h"
 #include "sysdep/barrier.h"
 #include "sysdep/sigcontext.h"
+#include "task.h"
 #include "user.h"
 
+void (*sig_info[NSIG])(int, struct uml_pt_regs *) = {
+        [SIGTRAP]       = relay_signal,
+        [SIGFPE]        = relay_signal,
+        [SIGILL]        = relay_signal,
+        [SIGWINCH]      = winch,
+        [SIGBUS]        = bus_handler,
+        [SIGSEGV]       = segv_handler,
+        [SIGIO]         = sigio_handler,
+        [SIGVTALRM]     = timer_handler };
+
+static struct uml_pt_regs ksig_regs[UM_NR_CPUS];
+
+void sig_handler_common_skas(int sig, void *sc_ptr)
+{
+        struct sigcontext *sc = sc_ptr;
+        struct uml_pt_regs *r;
+        void (*handler)(int, struct uml_pt_regs *);
+        int save_user, save_errno = errno;
+
+        /*
+         * This is done because to allow SIGSEGV to be delivered inside a SEGV
+         * handler.  This can happen in copy_user, and if SEGV is disabled,
+         * the process will die.
+         * XXX Figure out why this is better than SA_NODEFER
+         */
+        if (sig == SIGSEGV) {
+                change_sig(SIGSEGV, 1);
+                /*
+                 * For segfaults, we want the data from the
+                 * sigcontext.  In this case, we don't want to mangle
+                 * the process registers, so use a static set of
+                 * registers.  For other signals, the process
+                 * registers are OK.
+                 */
+                r = &ksig_regs[cpu()];
+                copy_sc(r, sc_ptr);
+        } else
+                r = TASK_REGS(get_current());
+
+        save_user = r->is_user;
+        r->is_user = 0;
+        if ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
+            (sig == SIGILL) || (sig == SIGTRAP))
+                GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
+
+        change_sig(SIGUSR1, 1);
+
+        handler = sig_info[sig];
+
+        /* unblock SIGVTALRM, SIGIO if sig isn't IRQ signal */
+        if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGVTALRM))
+                unblock_signals();
+
+        handler(sig, r);
+
+        errno = save_errno;
+        r->is_user = save_user;
+}
+
 /* Copied from linux/compiler-gcc.h since we can't include it directly */
 #define barrier() __asm__ __volatile__("": : :"memory")
 
diff --git a/arch/um/os-Linux/skas/Makefile b/arch/um/os-Linux/skas/Makefile
index 5fd8d4dad66a..d2ea3409e072 100644
--- a/arch/um/os-Linux/skas/Makefile
+++ b/arch/um/os-Linux/skas/Makefile
@@ -1,10 +1,10 @@
 #
-# Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com)
+# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
 # Licensed under the GPL
 #
 
-obj-y := mem.o process.o trap.o
+obj-y := mem.o process.o
 
-USER_OBJS := mem.o process.o trap.o
+USER_OBJS := $(obj-y)
 
 include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
deleted file mode 100644
index a19a74f08fa9..000000000000
--- a/arch/um/os-Linux/skas/trap.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <errno.h>
-#include <signal.h>
-#include "sysdep/ptrace.h"
-#include "kern_constants.h"
-#include "as-layout.h"
-#include "kern_util.h"
-#include "os.h"
-#include "sigcontext.h"
-#include "task.h"
-
-void (*sig_info[NSIG])(int, struct uml_pt_regs *) = {
-        [SIGTRAP]       = relay_signal,
-        [SIGFPE]        = relay_signal,
-        [SIGILL]        = relay_signal,
-        [SIGWINCH]      = winch,
-        [SIGBUS]        = bus_handler,
-        [SIGSEGV]       = segv_handler,
-        [SIGIO]         = sigio_handler,
-        [SIGVTALRM]     = timer_handler };
-
-static struct uml_pt_regs ksig_regs[UM_NR_CPUS];
-
-void sig_handler_common_skas(int sig, void *sc_ptr)
-{
-        struct sigcontext *sc = sc_ptr;
-        struct uml_pt_regs *r;
-        void (*handler)(int, struct uml_pt_regs *);
-        int save_user, save_errno = errno;
-
-        /*
-         * This is done because to allow SIGSEGV to be delivered inside a SEGV
-         * handler.  This can happen in copy_user, and if SEGV is disabled,
-         * the process will die.
-         * XXX Figure out why this is better than SA_NODEFER
-         */
-        if (sig == SIGSEGV) {
-                change_sig(SIGSEGV, 1);
-                /*
-                 * For segfaults, we want the data from the
-                 * sigcontext.  In this case, we don't want to mangle
-                 * the process registers, so use a static set of
-                 * registers.  For other signals, the process
-                 * registers are OK.
-                 */
-                r = &ksig_regs[cpu()];
-                copy_sc(r, sc_ptr);
-        }
-        else r = TASK_REGS(get_current());
-
-        save_user = r->is_user;
-        r->is_user = 0;
-        if ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
-            (sig == SIGILL) || (sig == SIGTRAP))
-                GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
-
-        change_sig(SIGUSR1, 1);
-
-        handler = sig_info[sig];
-
-        /* unblock SIGVTALRM, SIGIO if sig isn't IRQ signal */
-        if ((sig != SIGIO) && (sig != SIGWINCH) && (sig != SIGVTALRM))
-                unblock_signals();
-
-        handler(sig, r);
-
-        errno = save_errno;
-        r->is_user = save_user;
-}