1 files changed, 21 insertions, 28 deletions

diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c
index 9ad5fbec4593..3b600c2e63b8 100644
--- a/arch/um/os-Linux/skas/trap.c
+++ b/arch/um/os-Linux/skas/trap.c
@@ -5,8 +5,8 @@
 
 #include <signal.h>
 #include <errno.h>
-#include "user_util.h"
 #include "kern_util.h"
+#include "as-layout.h"
 #include "task.h"
 #include "sigcontext.h"
 #include "skas.h"
@@ -15,29 +15,39 @@
 #include "sysdep/ptrace_user.h"
 #include "os.h"
 
+static union uml_pt_regs ksig_regs[UM_NR_CPUS];
+
 void sig_handler_common_skas(int sig, void *sc_ptr)
 {
 	struct sigcontext *sc = sc_ptr;
-	struct skas_regs *r;
+	union uml_pt_regs *r;
 	void (*handler)(int, union uml_pt_regs *);
-	int save_errno = errno;
-	int save_user;
+	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)
+	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());
 
-	r = &TASK_REGS(get_current())->skas;
-	save_user = r->is_user;
-	r->is_user = 0;
+	save_user = r->skas.is_user;
+	r->skas.is_user = 0;
 	if ( sig == SIGFPE || sig == SIGSEGV ||
 	     sig == SIGBUS || sig == SIGILL ||
 	     sig == SIGTRAP ) {
-		GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
+		GET_FAULTINFO_FROM_SC(r->skas.faultinfo, sc);
 	}
 
 	change_sig(SIGUSR1, 1);
@@ -49,25 +59,8 @@ void sig_handler_common_skas(int sig, void *sc_ptr)
 	    sig != SIGVTALRM && sig != SIGALRM)
 		unblock_signals();
 
-	handler(sig, (union uml_pt_regs *) r);
+	handler(sig, r);
 
 	errno = save_errno;
-	r->is_user = save_user;
-}
-
-extern int ptrace_faultinfo;
-
-void user_signal(int sig, union uml_pt_regs *regs, int pid)
-{
-	void (*handler)(int, union uml_pt_regs *);
-	int segv = ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) ||
-		    (sig == SIGILL) || (sig == SIGTRAP));
-
-	if (segv)
-		get_skas_faultinfo(pid, &regs->skas.faultinfo);
-
-	handler = sig_info[sig];
-	handler(sig, (union uml_pt_regs *) regs);
-
-	unblock_signals();
+	r->skas.is_user = save_user;
 }