ARM: add comments re DAP assumptions

[openocd.git] / src / target / arm9tdmi.c

diff --git a/src/target/arm9tdmi.c b/src/target/arm9tdmi.c
index 301412cd7936dc4cc98894d148dfb9a8317a38f9..ae0c4e05edd30462e0e7667758e8e708e2de8984 100644 (file)
--- a/src/target/arm9tdmi.c
+++ b/src/target/arm9tdmi.c
@@ -269,8 +269,6 @@ int arm9tdmi_clock_data_in(struct arm_jtag *jtag_info, uint32_t *in)
        return ERROR_OK;
 }
 
-extern void arm_endianness(uint8_t *tmp, void *in, int size, int be, int flip);
-
 static int arm9endianness(jtag_callback_data_t arg,
        jtag_callback_data_t size, jtag_callback_data_t be,
        jtag_callback_data_t captured)
@@ -836,6 +834,12 @@ COMMAND_HANDLER(handle_arm9tdmi_catch_vectors_command)
        struct reg *vector_catch;
        uint32_t vector_catch_value;
 
+       if (!target_was_examined(target))
+       {
+               LOG_ERROR("Target not examined yet");
+               return ERROR_FAIL;
+       }
+
        /* it's uncommon, but some ARM7 chips can support this */
        if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC
                        || !arm7_9->has_vector_catch) {