[PATCH V3] include: Add check for offset fw_dynamic_info

[Xiang W]

Add static detection to prevent the modification of struct fw_dynamic_info
from forgetting the modification of FW_DYNAMIC_INFO_xxx_OFFSET

Signed-off-by: Xiang W <wxjstz at 126.com>
---
V3 change:
* reword commit message

 include/sbi/fw_dynamic.h | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/include/sbi/fw_dynamic.h b/include/sbi/fw_dynamic.h
index dea207b..978f10b 100644
--- a/include/sbi/fw_dynamic.h
+++ b/include/sbi/fw_dynamic.h
@@ -74,6 +74,38 @@ struct fw_dynamic_info {
 	 */
 	unsigned long boot_hart;
 } __packed;
+/** Prevent modification of struct fw_dynamic_info from affecting
+ * FW_DYNAMIC_INFO_xxx_OFFSET */
+_Static_assert(
+	offsetof(struct fw_dynamic_info, magic)
+		== FW_DYNAMIC_INFO_MAGIC_OFFSET,
+	"struct fw_dynamic_info definition has changed, please redefine "
+	"FW_DYNAMIC_INFO_MAGIC_OFFSET");
+_Static_assert(
+	offsetof(struct fw_dynamic_info, version)
+		== FW_DYNAMIC_INFO_VERSION_OFFSET,
+	"struct fw_dynamic_info definition has changed, please redefine "
+	"FW_DYNAMIC_INFO_VERSION_OFFSET");
+_Static_assert(
+	offsetof(struct fw_dynamic_info, next_addr)
+		== FW_DYNAMIC_INFO_NEXT_ADDR_OFFSET,
+	"struct fw_dynamic_info definition has changed, please redefine "
+	"FW_DYNAMIC_INFO_NEXT_ADDR_OFFSET");
+_Static_assert(
+	offsetof(struct fw_dynamic_info, next_mode)
+		== FW_DYNAMIC_INFO_NEXT_MODE_OFFSET,
+	"struct fw_dynamic_info definition has changed, please redefine "
+	"FW_DYNAMIC_INFO_NEXT_MODE_OFFSET");
+_Static_assert(
+	offsetof(struct fw_dynamic_info, options)
+		== FW_DYNAMIC_INFO_OPTIONS_OFFSET,
+	"struct fw_dynamic_info definition has changed, please redefine "
+	"FW_DYNAMIC_INFO_OPTIONS_OFFSET");
+_Static_assert(
+	offsetof(struct fw_dynamic_info, boot_hart)
+		== FW_DYNAMIC_INFO_BOOT_HART_OFFSET,
+	"struct fw_dynamic_info definition has changed, please redefine "
+	"FW_DYNAMIC_INFO_BOOT_HART_OFFSET");
 
 #endif
 
-- 
2.30.2