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Diffstat (limited to 'kern')
-rw-r--r--kern/startup.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/kern/startup.c b/kern/startup.c
index 417fa4a..a4b5a6f 100644
--- a/kern/startup.c
+++ b/kern/startup.c
@@ -27,6 +27,8 @@
* Mach kernel startup.
*/
+#include <string.h>
+
#include <mach/boolean.h>
#include <mach/machine.h>
#include <mach/task_special_ports.h>
@@ -76,6 +78,10 @@ extern void device_service_create();
void cpu_launch_first_thread(); /* forward */
void start_kernel_threads(); /* forward */
+#if ! MACH_KBD
+boolean_t reboot_on_panic = 1;
+#endif
+
#if NCPUS > 1
extern void start_other_cpus();
extern void action_thread();
@@ -83,6 +89,7 @@ extern void action_thread();
/* XX */
extern vm_offset_t phys_first_addr, phys_last_addr;
+extern char *kernel_cmdline;
/*
* Running in virtual memory, on the interrupt stack.
@@ -94,6 +101,23 @@ void setup_main()
{
thread_t startup_thread;
+#if MACH_KDB
+ /*
+ * Cause a breakpoint trap to the debugger before proceeding
+ * any further if the proper option flag was specified
+ * on the kernel's command line.
+ * XXX check for surrounding spaces.
+ */
+ if (strstr(kernel_cmdline, "-d ")) {
+ cninit(); /* need console for debugger */
+ SoftDebugger("init");
+ }
+#else /* MACH_KDB */
+ if (strstr (kernel_cmdline, "-H ")) {
+ reboot_on_panic = 0;
+ }
+#endif /* MACH_KDB */
+
panic_init();
printf_init();