kdump: sh: parse elfcorehdr command line argument

[linux-2.6-omap-h63xx.git] / arch / sh / kernel / traps.c

diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index a3bdc68ef02c75adcdbfaca4b5d61c3218c60521..438f1ebcc45330cc0a5d320fee82a4b6840bcf1d 100644 (file)
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -4,6 +4,7 @@
 #include <linux/kdebug.h>
 #include <linux/signal.h>
 #include <linux/sched.h>
+#include <linux/uaccess.h>
 #include <asm/system.h>
 
 #ifdef CONFIG_BUG
@@ -21,7 +22,14 @@ static void handle_BUG(struct pt_regs *regs)
 
 int is_valid_bugaddr(unsigned long addr)
 {
-       return addr >= PAGE_OFFSET;
+       unsigned short opcode;
+
+       if (addr < PAGE_OFFSET)
+               return 0;
+       if (probe_kernel_address((u16 *)addr, opcode))
+               return 0;
+
+       return opcode == TRAPA_BUG_OPCODE;
 }
 #endif