Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6

[linux-2.6] / arch / mips / kernel / traps.c

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 549cbb8209a327d1ce332ac793887a8a7613df79..b7292a56d4cd80b65d4bf2ef6f6ff016d371c857 100644 (file)
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -41,6 +41,7 @@
 #include <asm/mmu_context.h>
 #include <asm/watch.h>
 #include <asm/types.h>
+#include <asm/stacktrace.h>
 
 extern asmlinkage void handle_int(void);
 extern asmlinkage void handle_tlbm(void);
@@ -74,8 +75,9 @@ void (*board_ejtag_handler_setup)(void);
 void (*board_bind_eic_interrupt)(int irq, int regset);
 
 
-static void show_raw_backtrace(unsigned long *sp)
+static void show_raw_backtrace(unsigned long reg29)
 {
+       unsigned long *sp = (unsigned long *)reg29;
        unsigned long addr;
 
        printk("Call Trace:");
@@ -91,39 +93,32 @@ static void show_raw_backtrace(unsigned long *sp)
 }
 
 #ifdef CONFIG_KALLSYMS
-static int raw_show_trace;
+int raw_show_trace;
 static int __init set_raw_show_trace(char *str)
 {
        raw_show_trace = 1;
        return 1;
 }
 __setup("raw_show_trace", set_raw_show_trace);
+#endif
 
-extern unsigned long unwind_stack(struct task_struct *task,
-                                 unsigned long **sp, unsigned long pc);
 static void show_backtrace(struct task_struct *task, struct pt_regs *regs)
 {
-       unsigned long *sp = (long *)regs->regs[29];
+       unsigned long sp = regs->regs[29];
+       unsigned long ra = regs->regs[31];
        unsigned long pc = regs->cp0_epc;
-       int top = 1;
 
        if (raw_show_trace || !__kernel_text_address(pc)) {
                show_raw_backtrace(sp);
                return;
        }
        printk("Call Trace:\n");
-       while (__kernel_text_address(pc)) {
+       do {
                print_ip_sym(pc);
-               pc = unwind_stack(task, &sp, pc);
-               if (top && pc == 0)
-                       pc = regs->regs[31];    /* leaf? */
-               top = 0;
-       }
+               pc = unwind_stack(task, &sp, pc, &ra);
+       } while (pc);
        printk("\n");
 }
-#else
-#define show_backtrace(task, r) show_raw_backtrace((long *)(r)->regs[29]);
-#endif
 
 /*
  * This routine abuses get_user()/put_user() to reference pointers
@@ -158,24 +153,6 @@ static void show_stacktrace(struct task_struct *task, struct pt_regs *regs)
        show_backtrace(task, regs);
 }
 
-static noinline void prepare_frametrace(struct pt_regs *regs)
-{
-       __asm__ __volatile__(
-               "1: la $2, 1b\n\t"
-#ifdef CONFIG_64BIT
-               "sd $2, %0\n\t"
-               "sd $29, %1\n\t"
-               "sd $31, %2\n\t"
-#else
-               "sw $2, %0\n\t"
-               "sw $29, %1\n\t"
-               "sw $31, %2\n\t"
-#endif
-               : "=m" (regs->cp0_epc),
-               "=m" (regs->regs[29]), "=m" (regs->regs[31])
-               : : "memory");
-}
-
 void show_stack(struct task_struct *task, unsigned long *sp)
 {
        struct pt_regs regs;
@@ -200,17 +177,10 @@ void show_stack(struct task_struct *task, unsigned long *sp)
  */
 void dump_stack(void)
 {
-       unsigned long stack;
+       struct pt_regs regs;
 
-#ifdef CONFIG_KALLSYMS
-       if (!raw_show_trace) {
-               struct pt_regs regs;
-               prepare_frametrace(&regs);
-               show_backtrace(current, &regs);
-               return;
-       }
-#endif
-       show_raw_backtrace(&stack);
+       prepare_frametrace(&regs);
+       show_backtrace(current, &regs);
 }
 
 EXPORT_SYMBOL(dump_stack);