---

yaml
---
r: 83189
b: refs/heads/master
c: ee3d9bd
h: refs/heads/master
i:
  83187: d569bab
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ca77b555c0aafa3070fbb67592abaaa1b8d31913
+refs/heads/master: ee3d9bd4de1ed93d2a7ee41c331ed30a1c7b8acd

trunk/arch/um/os-Linux/skas/process.c

@@ -55,10 +55,10 @@ static int ptrace_dump_regs(int pid)
  * Signals that are OK to receive in the stub - we'll just continue it.
  * SIGWINCH will happen when UML is inside a detached screen.
  */
-#define STUB_SIG_MASK ((1 << SIGVTALRM) | (1 << SIGWINCH))
+#define STUB_SIG_MASK (1 << SIGVTALRM)
 
 /* Signals that the stub will finish with - anything else is an error */
-#define STUB_DONE_MASK ((1 << SIGUSR1) | (1 << SIGTRAP))
+#define STUB_DONE_MASK (1 << SIGTRAP)
 
 void wait_stub_done(int pid)
 {
@@ -179,6 +179,7 @@ static int userspace_tramp(void *stack)
 	ptrace(PTRACE_TRACEME, 0, 0, 0);
 
 	signal(SIGTERM, SIG_DFL);
+	signal(SIGWINCH, SIG_IGN);
 	err = set_interval();
 	if (err)
 		panic("userspace_tramp - setting timer failed, errno = %d\n",
@@ -222,11 +223,7 @@ static int userspace_tramp(void *stack)
 
 		set_sigstack((void *) STUB_DATA, UM_KERN_PAGE_SIZE);
 		sigemptyset(&sa.sa_mask);
-		sigaddset(&sa.sa_mask, SIGIO);
-		sigaddset(&sa.sa_mask, SIGWINCH);
-		sigaddset(&sa.sa_mask, SIGVTALRM);
-		sigaddset(&sa.sa_mask, SIGUSR1);
-		sa.sa_flags = SA_ONSTACK;
+		sa.sa_flags = SA_ONSTACK | SA_NODEFER;
 		sa.sa_handler = (void *) v;
 		sa.sa_restorer = NULL;
 		if (sigaction(SIGSEGV, &sa, NULL) < 0)

trunk/arch/um/sys-i386/stub_segv.c

@@ -1,32 +1,17 @@
 /*
- * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
-#include <signal.h>
-#include <sys/select.h> /* The only way I can see to get sigset_t */
-#include <asm/unistd.h>
-#include "as-layout.h"
-#include "uml-config.h"
 #include "sysdep/stub.h"
 #include "sysdep/sigcontext.h"
-#include "sysdep/faultinfo.h"
 
 void __attribute__ ((__section__ (".__syscall_stub")))
 stub_segv_handler(int sig)
 {
 	struct sigcontext *sc = (struct sigcontext *) (&sig + 1);
-	int pid;
 
 	GET_FAULTINFO_FROM_SC(*((struct faultinfo *) STUB_DATA), sc);
 
-	pid = stub_syscall0(__NR_getpid);
-	stub_syscall2(__NR_kill, pid, SIGUSR1);
-
-	/* Load pointer to sigcontext into esp, since we need to leave
-	 * the stack in its original form when we do the sigreturn here, by
-	 * hand.
-	 */
-	__asm__ __volatile__("mov %0,%%esp ; movl %1, %%eax ; "
-			     "int $0x80" : : "a" (sc), "g" (__NR_sigreturn));
+	trap_myself();
 }

trunk/arch/um/sys-x86_64/stub_segv.c

@@ -1,51 +1,22 @@
 /*
- * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
-#include <stddef.h>
 #include <signal.h>
-#include <asm/unistd.h>
 #include "as-layout.h"
-#include "uml-config.h"
-#include "sysdep/sigcontext.h"
-#include "sysdep/faultinfo.h"
 #include "sysdep/stub.h"
-
-/* Copied from sys-x86_64/signal.c - Can't find an equivalent definition
- * in the libc headers anywhere.
- */
-struct rt_sigframe
-{
-	char *pretcode;
-	struct ucontext uc;
-	struct siginfo info;
-};
-
-/* Copied here from <linux/kernel.h> - we're userspace. */
-#define container_of(ptr, type, member) ({                   \
-	const typeof( ((type *)0)->member ) *__mptr = (ptr); \
-	(type *)( (char *)__mptr - offsetof(type,member) );})
+#include "sysdep/faultinfo.h"
+#include "sysdep/sigcontext.h"
 
 void __attribute__ ((__section__ (".__syscall_stub")))
 stub_segv_handler(int sig)
 {
 	struct ucontext *uc;
-        int pid;
 
 	__asm__ __volatile__("movq %%rdx, %0" : "=g" (uc) :);
 	GET_FAULTINFO_FROM_SC(*((struct faultinfo *) STUB_DATA),
 			      &uc->uc_mcontext);
-
-	pid = stub_syscall0(__NR_getpid);
-	stub_syscall2(__NR_kill, pid, SIGUSR1);
-
-	/* sys_sigreturn expects that the stack pointer will be 8 bytes into
-	 * the signal frame.  So, we use the ucontext pointer, which we know
-	 * already, to get the signal frame pointer, and add 8 to that.
-	 */
-	__asm__ __volatile__("movq %0, %%rsp; movq %1, %%rax ; syscall": :
-                             "g" ((unsigned long)
-                                  container_of(uc, struct rt_sigframe, uc) + 8),
-                             "g" (__NR_rt_sigreturn));
+	trap_myself();
 }
+