X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fum%2Fos-Linux%2Futil.c;h=42827cafa6af3ac72f4c57d62e08968b81360faa;hb=4d9dec4db2efbd7edb549bd02373995b67496983;hp=a6f31d476993cd0314c8c6adbf9dad0c7c796f15;hpb=7924e4f6519dd5b349ed146fe9fe35206730be67;p=pandora-kernel.git

diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index a6f31d476993..42827cafa6af 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -1,39 +1,25 @@
 /*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <limits.h>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <sys/utsname.h>
-#include <sys/param.h>
-#include <sys/time.h>
-#include "asm/types.h"
-#include <ctype.h>
-#include <signal.h>
-#include <wait.h>
 #include <errno.h>
-#include <stdarg.h>
-#include <sched.h>
-#include <termios.h>
+#include <signal.h>
 #include <string.h>
-#include "kern_util.h"
-#include "user.h"
-#include "mem_user.h"
-#include "init.h"
-#include "ptrace_user.h"
-#include "uml-config.h"
-#include "os.h"
-#include "longjmp.h"
+#include <termios.h>
+#include <wait.h>
+#include <sys/mman.h>
+#include <sys/utsname.h>
 #include "kern_constants.h"
+#include "os.h"
+#include "user.h"
 
 void stack_protections(unsigned long address)
 {
-	if(mprotect((void *) address, UM_THREAD_SIZE,
+	if (mprotect((void *) address, UM_THREAD_SIZE,
 		    PROT_READ | PROT_WRITE | PROT_EXEC) < 0)
 		panic("protecting stack failed, errno = %d", errno);
 }
@@ -44,17 +30,19 @@ int raw(int fd)
 	int err;
 
 	CATCH_EINTR(err = tcgetattr(fd, &tt));
-	if(err < 0)
+	if (err < 0)
 		return -errno;
 
 	cfmakeraw(&tt);
 
 	CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
-	if(err < 0)
+	if (err < 0)
 		return -errno;
 
-	/* XXX tcsetattr could have applied only some changes
-	 * (and cfmakeraw() is a set of changes) */
+	/*
+	 * XXX tcsetattr could have applied only some changes
+	 * (and cfmakeraw() is a set of changes)
+	 */
 	return 0;
 }
 
@@ -88,6 +76,26 @@ void setup_hostinfo(char *buf, int len)
 		 host.release, host.version, host.machine);
 }
 
+/*
+ * We cannot use glibc's abort(). It makes use of tgkill() which
+ * has no effect within UML's kernel threads.
+ * After that glibc would execute an invalid instruction to kill
+ * the calling process and UML crashes with SIGSEGV.
+ */
+static inline void __attribute__ ((noreturn)) uml_abort(void)
+{
+	sigset_t sig;
+
+	fflush(NULL);
+
+	if (!sigemptyset(&sig) && !sigaddset(&sig, SIGABRT))
+		sigprocmask(SIG_UNBLOCK, &sig, 0);
+
+	for (;;)
+		if (kill(getpid(), SIGABRT) < 0)
+			exit(127);
+}
+
 void os_dump_core(void)
 {
 	int pid;
@@ -129,5 +137,5 @@ void os_dump_core(void)
 	while ((pid = waitpid(-1, NULL, WNOHANG | __WALL)) > 0)
 		os_kill_ptraced_process(pid, 0);
 
-	abort();
+	uml_abort();
 }