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>

diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c
index aaddb724a5fb266013c62bd528304588f2dc9aca..ce9981b5339bb08cf82bdd10d79ca8c385b11bbb 100644 (file)
--- 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;