[efi] Print well-known GUIDs by name in debug messages

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/interface/efi/efi_debug.c b/src/interface/efi/efi_debug.c
index f1427f511846000d3bb4647cee42b7e77e3a4247..611f46cefad676d4f63e5e1d526c24751b664550 100644 (file)
--- a/src/interface/efi/efi_debug.c
+++ b/src/interface/efi/efi_debug.c
@@ -34,6 +34,10 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #include <ipxe/efi/efi_driver.h>
 #include <ipxe/efi/Protocol/DevicePath.h>
 #include <ipxe/efi/Protocol/DevicePathToText.h>
+#include <ipxe/efi/Protocol/BlockIo.h>
+#include <ipxe/efi/Protocol/DiskIo.h>
+#include <ipxe/efi/Protocol/SimpleFileSystem.h>
+#include <ipxe/efi/Protocol/SimpleNetwork.h>
 
 /** Device path protocol GUID */
 static EFI_GUID efi_device_path_protocol_guid
@@ -43,6 +47,24 @@ static EFI_GUID efi_device_path_protocol_guid
 static EFI_DEVICE_PATH_TO_TEXT_PROTOCOL *efidpt;
 EFI_REQUEST_PROTOCOL ( EFI_DEVICE_PATH_TO_TEXT_PROTOCOL, &efidpt );
 
+/** A well-known GUID */
+struct efi_well_known_guid {
+       /** GUID */
+       EFI_GUID guid;
+       /** Name */
+       const char *name;
+};
+
+/** Well-known GUIDs */
+static struct efi_well_known_guid efi_well_known_guids[] = {
+       { EFI_BLOCK_IO_PROTOCOL_GUID,           "BlockIo" },
+       { EFI_DISK_IO_PROTOCOL_GUID,            "DiskIo" },
+       { EFI_DEVICE_PATH_PROTOCOL_GUID,        "DevicePath" },
+       { EFI_LOADED_IMAGE_PROTOCOL_GUID,       "LoadedImage" },
+       { EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID, "SimpleFileSystem" },
+       { EFI_SIMPLE_NETWORK_PROTOCOL_GUID,     "SimpleNetwork" },
+};
+
 /**
  * Convert GUID to a printable string
  *
@@ -54,6 +76,16 @@ const char * efi_guid_ntoa ( EFI_GUID *guid ) {
                union uuid uuid;
                EFI_GUID guid;
        } u;
+       unsigned int i;
+
+       /* Check for a match against well-known GUIDs */
+       for ( i = 0 ; i < ( sizeof ( efi_well_known_guids ) /
+                           sizeof ( efi_well_known_guids[0] ) ) ; i++ ) {
+               if ( memcmp ( guid, &efi_well_known_guids[i].guid,
+                             sizeof ( *guid ) ) == 0 ) {
+                       return efi_well_known_guids[i].name;
+               }
+       }
 
        /* Convert GUID to standard endianness */
        memcpy ( &u.guid, guid, sizeof ( u.guid ) );