From 0c93800ec1d3b1a3b4d1fb7358f0acf864d4b385 Mon Sep 17 00:00:00 2001
From: Martin Luessi <mluessi@gmail.com>
Date: Thu, 1 Jun 2023 08:50:09 -0700
Subject: [PATCH] AP_HAL_ChibiOS: Copy vector table to RAM if external flash is
 primary

---
 libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk  | 4 ++++
 libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py | 1 +
 2 files changed, 5 insertions(+)

diff --git a/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk b/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk
index df4fcea197..893b358f54 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk
+++ b/libraries/AP_HAL_ChibiOS/hwdef/common/chibios_board.mk
@@ -264,6 +264,10 @@ endif
 # Define ASM defines here
 UADEFS =
 
+ifeq ($(COPY_VECTORS_TO_RAM),yes)
+ UADEFS += -DCRT0_INIT_VECTORS=1
+endif
+
 # List all user directories here
 UINCDIR =
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
index e7703b7341..1f92219bbb 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
+++ b/libraries/AP_HAL_ChibiOS/hwdef/scripts/chibios_hwdef.py
@@ -1363,6 +1363,7 @@ INCLUDE common_mixf.ld
 ''' % (flash_base, flash_length, ext_flash_base, ext_flash_length, ram0_start, ram0_len))
         else:
             self.env_vars['HAS_EXTERNAL_FLASH_SECTIONS'] = 1
+            self.build_flags.append('COPY_VECTORS_TO_RAM=yes')
             f.write('''/* generated ldscript.ld */
 MEMORY
 {