For now, unconditionally lock the GDB stub ROM as soon as possible.
---
 software/bios/main.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/software/bios/main.c b/software/bios/main.c
index d476831..2182114 100644
--- a/software/bios/main.c
+++ b/software/bios/main.c
@@ -613,6 +613,9 @@ int main(int i, char **c)
 {
        char buffer[64];
 
+       /* lock gdbstub ROM */
+       CSR_DBG_WRITE_LOCK = 1;
+
        CSR_GPIO_OUT = GPIO_LED1;
        rescue = !((unsigned int)main > FLASH_OFFSET_REGULAR_BIOS);
 
-- 
1.7.2.5

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