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-rw-r--r--arch/sh/kernel/traps.c24
1 files changed, 20 insertions, 4 deletions
diff --git a/arch/sh/kernel/traps.c b/arch/sh/kernel/traps.c
index b3e0067db35..f69bd968fcc 100644
--- a/arch/sh/kernel/traps.c
+++ b/arch/sh/kernel/traps.c
@@ -5,18 +5,32 @@
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
+#include <asm/unwinder.h>
#include <asm/system.h>
#ifdef CONFIG_BUG
-static void handle_BUG(struct pt_regs *regs)
+void handle_BUG(struct pt_regs *regs)
{
+ const struct bug_entry *bug;
+ unsigned long bugaddr = regs->pc;
enum bug_trap_type tt;
- tt = report_bug(regs->pc, regs);
+
+ if (!is_valid_bugaddr(bugaddr))
+ goto invalid;
+
+ bug = find_bug(bugaddr);
+
+ /* Switch unwinders when unwind_stack() is called */
+ if (bug->flags & BUGFLAG_UNWINDER)
+ unwinder_faulted = 1;
+
+ tt = report_bug(bugaddr, regs);
if (tt == BUG_TRAP_TYPE_WARN) {
- regs->pc += instruction_size(regs->pc);
+ regs->pc += instruction_size(bugaddr);
return;
}
+invalid:
die("Kernel BUG", regs, TRAPA_BUG_OPCODE & 0xff);
}
@@ -28,8 +42,10 @@ int is_valid_bugaddr(unsigned long addr)
return 0;
if (probe_kernel_address((insn_size_t *)addr, opcode))
return 0;
+ if (opcode == TRAPA_BUG_OPCODE)
+ return 1;
- return opcode == TRAPA_BUG_OPCODE;
+ return 0;
}
#endif