LoongArch: Add guess unwinder support

[linux-2.6-microblaze.git] / arch / loongarch / kernel / traps.c

diff --git a/arch/loongarch/kernel/traps.c b/arch/loongarch/kernel/traps.c
index 1bf58c6..f65fdf9 100644 (file)
--- a/arch/loongarch/kernel/traps.c
+++ b/arch/loongarch/kernel/traps.c
@@ -43,6 +43,7 @@
 #include <asm/stacktrace.h>
 #include <asm/tlb.h>
 #include <asm/types.h>
+#include <asm/unwind.h>
 
 #include "access-helper.h"
 
@@ -64,19 +65,17 @@ static void show_backtrace(struct task_struct *task, const struct pt_regs *regs,
                           const char *loglvl, bool user)
 {
        unsigned long addr;
-       unsigned long *sp = (unsigned long *)(regs->regs[3] & ~3);
+       struct unwind_state state;
+       struct pt_regs *pregs = (struct pt_regs *)regs;
+
+       if (!task)
+               task = current;
 
        printk("%sCall Trace:", loglvl);
-#ifdef CONFIG_KALLSYMS
-       printk("%s\n", loglvl);
-#endif
-       while (!kstack_end(sp)) {
-               if (__get_addr(&addr, sp++, user)) {
-                       printk("%s (Bad stack address)", loglvl);
-                       break;
-               }
-               if (__kernel_text_address(addr))
-                       print_ip_sym(loglvl, addr);
+       for (unwind_start(&state, task, pregs);
+             !unwind_done(&state); unwind_next_frame(&state)) {
+               addr = unwind_get_return_address(&state);
+               print_ip_sym(loglvl, addr);
        }
        printk("%s\n", loglvl);
 }