[libc][uefi] add status codes

Author: RossComputerGuy

libc/include/llvm-libc-types/EFI_STATUS.h

@@ -13,4 +13,48 @@
 
 typedef size_t EFI_STATUS;
 
+#define EFI_SUCCESS 0
+
+#define EFI_LOAD_ERROR 1
+#define EFI_INVALID_PARAMETER 2
+#define EFI_UNSUPPORTED 3
+#define EFI_BAD_BUFFER_SIZE 4
+#define EFI_BUFFER_TOO_SMALL 5
+#define EFI_NOT_READY 6
+#define EFI_DEVICE_ERROR 7
+#define EFI_WRITE_PROTECTED 8
+#define EFI_OUT_OF_RESOURCES 9
+#define EFI_VOLUME_CORRUPTED 10
+#define EFI_VOLUME_FULL 11
+#define EFI_NO_MEDIA 12
+#define EFI_MEDIA_CHANGED 13
+#define EFI_NOT_FOUND 14
+#define EFI_ACCESS_DENIED 15
+#define EFI_NO_RESPONSE 16
+#define EFI_NO_MAPPING 17
+#define EFI_TIMEOUT 18
+#define EFI_NOT_STARTED 19
+#define EFI_ALREADY_STARTED 20
+#define EFI_ABORTED 21
+#define EFI_ICMP_ERROR 22
+#define EFI_TFTP_ERROR 23
+#define EFI_PROTOCOL_ERROR 24
+#define EFI_INCOMPATIBLE_VERSION 25
+#define EFI_SECURITY_VIOLATION 26
+#define EFI_CRC_ERROR 27
+#define EFI_END_OF_MEDIA 28
+#define EFI_END_OF_FILE 31
+#define EFI_INVALID_LANGUAGE 32
+#define EFI_COMPROMISED_DATA 33
+#define EFI_IP_ADDRESS_CONFLICT 34
+#define EFI_HTTP_ERROR 35
+
+#define EFI_WARN_UNKNOWN_GLYPH 1
+#define EFI_WARN_DELETE_FAILURE 2
+#define EFI_WARN_WRITE_FAILURE 3
+#define EFI_WARN_BUFFER_TOO_SMALL 4
+#define EFI_WARN_STALE_DATA 5
+#define EFI_WARN_FILE_SYSTEM 6
+#define EFI_WARN_RESET_REQUIRED 7
+
 #endif // LLVM_LIBC_TYPES_EFI_STATUS_H

libc/startup/uefi/crt1.cpp

@@ -27,6 +27,6 @@ EFI_STATUS EfiMain(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *SystemTable) {
   main(0, nullptr, nullptr);
 
   // TODO: convert the return value of main to EFI_STATUS
-  return 0; // TODO: EFI_SUCCESS
+  return EFI_SUCCESS;
 }
 }