uml: dump core on panic
Dump core after a panic. This will provide better debugging information than
is currently available.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index b463170..901804d 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -279,6 +279,7 @@
extern void setup_machinename(char *machine_out);
extern void setup_hostinfo(char *buf, int len);
extern int setjmp_wrapper(void (*proc)(void *, void *), ...);
+extern void os_dump_core(void);
/* time.c */
#define BILLION (1000 * 1000 * 1000)
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 9bf3153..1cf954a 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -474,7 +474,7 @@
show_regs(&(current->thread.regs));
bust_spinlocks(0);
uml_exitcode = 1;
- machine_halt();
+ os_dump_core();
return 0;
}
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 48bc492..c307a89 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -119,3 +119,9 @@
va_end(args);
return n;
}
+
+void os_dump_core(void)
+{
+ signal(SIGSEGV, SIG_DFL);
+ abort();
+}