vserver 2.0 rc7

[linux-2.6.git] / arch / um / kernel / sysrq.c

diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c
index e630438..f808500 100644 (file)
--- a/arch/um/kernel/sysrq.c
+++ b/arch/um/kernel/sysrq.c
@@ -3,6 +3,7 @@
  * Licensed under the GPL
  */
 
+#include "linux/config.h"
 #include "linux/sched.h"
 #include "linux/kernel.h"
 #include "linux/module.h"
@@ -12,14 +13,14 @@
 #include "sysrq.h"
 #include "user_util.h"
 
-void show_trace(unsigned long * stack)
+/* Catch non-i386 SUBARCH's. */
+#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT)
+void show_trace(struct task_struct *task, unsigned long * stack)
 {
-       /* XXX: Copy the CONFIG_FRAME_POINTER stack-walking backtrace from
-        * arch/i386/kernel/traps.c, and then move this to sys-i386/sysrq.c.*/
         unsigned long addr;
 
         if (!stack) {
-                stack = (unsigned long*) &stack;
+               stack = (unsigned long*) &stack;
                WARN_ON(1);
        }
 
@@ -35,6 +36,7 @@ void show_trace(unsigned long * stack)
         }
         printk("\n");
 }
+#endif
 
 /*
  * stack dumps generator - this is used by arch-independent code.
@@ -44,7 +46,7 @@ void dump_stack(void)
 {
        unsigned long stack;
 
-       show_trace(&stack);
+       show_trace(current, &stack);
 }
 EXPORT_SYMBOL(dump_stack);
 
@@ -59,7 +61,11 @@ void show_stack(struct task_struct *task, unsigned long *esp)
        int i;
 
        if (esp == NULL) {
-               if (task != current) {
+               if (task != current && task != NULL) {
+                       /* XXX: Isn't this bogus? I.e. isn't this the
+                        * *userspace* stack of this task? If not so, use this
+                        * even when task == current (as in i386).
+                        */
                        esp = (unsigned long *) KSTK_ESP(task);
                        /* Which one? No actual difference - just coding style.*/
                        //esp = (unsigned long *) PT_REGS_IP(&task->thread.regs);
@@ -77,5 +83,6 @@ void show_stack(struct task_struct *task, unsigned long *esp)
                printk("%08lx ", *stack++);
        }
 
-       show_trace(esp);
+       printk("Call Trace: \n");
+       show_trace(current, esp);
 }