sh: Fix bogus regs pointer in do_IRQ().

SH-3 and SH-4 were trampling the register, and SH-2 wasn't even
setting it in the first place. This ended up with some rather
broken behaviour in the sysrq show_regs().

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

2 files changed, 5 insertions, 1 deletions

diff --git a/arch/sh/kernel/cpu/sh2/entry.S b/arch/sh/kernel/cpu/sh2/entry.S
index 7f7d292f36ec..c16dc8fec489 100644
--- a/arch/sh/kernel/cpu/sh2/entry.S
+++ b/arch/sh/kernel/cpu/sh2/entry.S
@@ -165,6 +165,7 @@ ENTRY(exception_handler)
 
 interrupt_entry:
         mov     r9,r4
+        mov     r15,r5
         mov.l   6f,r9
         mov.l   7f,r8
         jmp     @r8
diff --git a/arch/sh/kernel/cpu/sh3/entry.S b/arch/sh/kernel/cpu/sh3/entry.S
index c19205b0f2c0..f3e827f29a46 100644
--- a/arch/sh/kernel/cpu/sh3/entry.S
+++ b/arch/sh/kernel/cpu/sh3/entry.S
@@ -514,13 +514,16 @@ skip_save:
 
 interrupt_exception:
         mov.l   1f, r9
+        mov.l   2f, r4
+        mov.l   @r4, r4
         jmp     @r9
-         nop
+         mov    r15, r5
         rts
          nop
 
         .align 2
 1:      .long   do_IRQ
+2:      .long   INTEVT
 
         .align  2
 ENTRY(exception_none)