4 files changed, 30 insertions, 4 deletions

diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c
index eee69b9f52c9..fb2a97a75fb1 100644
--- a/arch/um/os-Linux/main.c
+++ b/arch/um/os-Linux/main.c
@@ -78,7 +78,7 @@ static void install_fatal_handler(int sig)
         }
 }
 
-#define UML_LIB_PATH    ":/usr/lib/uml"
+#define UML_LIB_PATH    ":" OS_LIB_PATH "/uml"
 
 static void setup_env_path(void)
 {
@@ -142,7 +142,6 @@ int __init main(int argc, char **argv, char **envp)
          */
         install_fatal_handler(SIGINT);
         install_fatal_handler(SIGTERM);
-        install_fatal_handler(SIGHUP);
 
         scan_elf_aux(envp);
 
diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c
index e0477c3ee894..0c45dc8efb05 100644
--- a/arch/um/os-Linux/process.c
+++ b/arch/um/os-Linux/process.c
@@ -253,6 +253,7 @@ void init_new_thread_signals(void)
                     SA_ONSTACK | SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGALRM,
                     SIGVTALRM, -1);
         signal(SIGWINCH, SIG_IGN);
+        signal(SIGTERM, SIG_DFL);
 }
 
 int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr)
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index dec5678fc17f..6e3359d6a839 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -60,7 +60,7 @@ static inline long long timeval_to_ns(const struct timeval *tv)
 long long disable_timer(void)
 {
         struct itimerval time = ((struct itimerval) { { 0, 0 }, { 0, 0 } });
-        int remain, max = UM_NSEC_PER_SEC / UM_HZ;
+        long long remain, max = UM_NSEC_PER_SEC / UM_HZ;
 
         if (setitimer(ITIMER_VIRTUAL, &time, &time) < 0)
                 printk(UM_KERN_ERR "disable_timer - setitimer failed, "
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 6ea77979531c..5803b1887672 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -5,6 +5,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 #include <errno.h>
 #include <signal.h>
 #include <string.h>
@@ -75,6 +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;
@@ -116,5 +137,10 @@ void os_dump_core(void)
         while ((pid = waitpid(-1, NULL, WNOHANG | __WALL)) > 0)
                 os_kill_ptraced_process(pid, 0);
 
-        abort();
+        uml_abort();
+}
+
+void um_early_printk(const char *s, unsigned int n)
+{
+        printf("%.*s", n, s);
 }