sh: Generic kgdb stub support.

This migrates from the old bitrotted kgdb stub implementation and moves
to the generic stub. In the process support for SH-2/SH-2A is also added,
which the old stub never provided.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 7 insertions, 3 deletions

diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index efbb4268875e..d62359cfbbe2 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -308,15 +308,19 @@ ENTRY(system_call)
         mov.l   1f, r9
         mov.l   @r9, r8         ! Read from TRA (Trap Address) Register
 #endif
+
+        mov     #OFF_TRA, r10
+        add     r15, r10
+        mov.l   r8, @r10                ! set TRA value to tra
+
         /*
          * Check the trap type
          */
         mov     #((0x20 << 2) - 1), r9
         cmp/hi  r9, r8
         bt/s    debug_trap              ! it's a debug trap..
-         mov    #OFF_TRA, r9
-        add     r15, r9
-        mov.l   r8, @r9                 ! set TRA value to tra
+         nop
+
 #ifdef CONFIG_TRACE_IRQFLAGS
         mov.l   5f, r10
         jsr     @r10