MdePkg: Add DECLARE_LENGTH opcode of dependency expression

To avoid messy parsing of the Depex section of a Capsule, it would be a lot easier for everyone involved if we preceded the Capsule Depex Section with a length declaration. It provides simple bounds checking to avoid having to parse the op-codes, but in the case of a malformed depex being parsed, avoid other issues which can be messy. REF: UEFI spec 2.10 Table 23.4 Signed-off-by: Yi Li <[email protected]> Cc: Michael D Kinney <[email protected]> Cc: Liming Gao <[email protected]> Cc: Zhiguang Liu <[email protected]> Reviewed-by: Wei6 Xu <[email protected]> Reviewed-by: Liming Gao <[email protected]>
ipxe · Jan 19, 2024 · 00bf689 · 00bf689
1 parent 9d3fe85
commit 00bf689
Showing 1 changed file with 15 additions and 14 deletions.
diff --git a/MdePkg/Include/Protocol/FirmwareManagement.h b/MdePkg/Include/Protocol/FirmwareManagement.h
@@ -30,20 +30,21 @@ typedef struct _EFI_FIRMWARE_MANAGEMENT_PROTOCOL EFI_FIRMWARE_MANAGEMENT_PROTOCO
 ///
 /// Dependency Expression Opcode
 ///
-#define EFI_FMP_DEP_PUSH_GUID     0x00
-#define EFI_FMP_DEP_PUSH_VERSION  0x01
-#define EFI_FMP_DEP_VERSION_STR   0x02
-#define EFI_FMP_DEP_AND           0x03
-#define EFI_FMP_DEP_OR            0x04
-#define EFI_FMP_DEP_NOT           0x05
-#define EFI_FMP_DEP_TRUE          0x06
-#define EFI_FMP_DEP_FALSE         0x07
-#define EFI_FMP_DEP_EQ            0x08
-#define EFI_FMP_DEP_GT            0x09
-#define EFI_FMP_DEP_GTE           0x0A
-#define EFI_FMP_DEP_LT            0x0B
-#define EFI_FMP_DEP_LTE           0x0C
-#define EFI_FMP_DEP_END           0x0D
+#define EFI_FMP_DEP_PUSH_GUID       0x00
+#define EFI_FMP_DEP_PUSH_VERSION    0x01
+#define EFI_FMP_DEP_VERSION_STR     0x02
+#define EFI_FMP_DEP_AND             0x03
+#define EFI_FMP_DEP_OR              0x04
+#define EFI_FMP_DEP_NOT             0x05
+#define EFI_FMP_DEP_TRUE            0x06
+#define EFI_FMP_DEP_FALSE           0x07
+#define EFI_FMP_DEP_EQ              0x08
+#define EFI_FMP_DEP_GT              0x09
+#define EFI_FMP_DEP_GTE             0x0A
+#define EFI_FMP_DEP_LT              0x0B
+#define EFI_FMP_DEP_LTE             0x0C
+#define EFI_FMP_DEP_END             0x0D
+#define EFI_FMP_DEP_DECLARE_LENGTH  0x0E
 
 ///
 /// Image Attribute - Dependency