Blackfin arch: fix bux - only reset the PC when necessary, otherwise gdb gets confused

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index aaddb724a5f..ce9981b5339 100644
--- a/arch/blackfin/kernel/traps.c
+++ b/arch/blackfin/kernel/traps.c
@@ -158,7 +158,7 @@ static void decode_address(char *buf, unsigned long address)
         }
 
         /* we were unable to find this address anywhere */
-        sprintf(buf, "[<0x%p>]", (void *)address);
+        sprintf(buf, "<0x%p> /* unknown address */", (void *)address);
 
 done:
         write_unlock_irqrestore(&tasklist_lock, flags);
@@ -467,7 +467,8 @@ asmlinkage void trap_c(struct pt_regs *fp)
                 /* Ensure that bad return addresses don't end up in an infinite
                  * loop, due to speculative loads/reads
                  */
-                fp->pc = SAFE_USER_INSTRUCTION;
+                if (trapnr == VEC_CPLB_I_M)
+                        fp->pc = SAFE_USER_INSTRUCTION;
         }
         info.si_signo = sig;
         info.si_errno = 0;