armv4_5: do not read/write non-existent registers

Change-Id: I4a0c401a325e57ba5d4d93d83b7e6b71a4d0865e
Signed-off-by: Tarek BOCHKATI <tarek.bouchkati@gmail.com>
Reviewed-on: http://openocd.zylin.com/6064
Tested-by: jenkins
Reviewed-by: Marc Schink <dev@zapb.de>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

diff --git a/src/target/armv4_5.c b/src/target/armv4_5.c
index 8ba9136462e6e25fbd1a30dcba49e1962eb5ac94..084a6f9b21413d78308590c57cd11ea7805bfebb 100644 (file)
--- a/src/target/armv4_5.c
+++ b/src/target/armv4_5.c
@@ -1681,7 +1681,7 @@ static int arm_full_context(struct target *target)
        int retval = ERROR_OK;
 
        for (; num_regs && retval == ERROR_OK; num_regs--, reg++) {
-               if (reg->valid)
+               if (!reg->exist || reg->valid)
                        continue;
                retval = armv4_5_get_core_reg(reg);
        }