+/* MIPS architecture level. */
+#define EF_MIPS_ARCH_1 0x00000000 /* -mips1 code. */
+#define EF_MIPS_ARCH_2 0x10000000 /* -mips2 code. */
+#define EF_MIPS_ARCH_3 0x20000000 /* -mips3 code. */
+#define EF_MIPS_ARCH_4 0x30000000 /* -mips4 code. */
+#define EF_MIPS_ARCH_5 0x40000000 /* -mips5 code. */
+#define EF_MIPS_ARCH_32 0x50000000 /* MIPS32 code. */
+#define EF_MIPS_ARCH_64 0x60000000 /* MIPS64 code. */
+
+/* The ABI of a file. */
+#define EF_MIPS_ABI_O32 0x00001000 /* O32 ABI. */
+#define EF_MIPS_ABI_O64 0x00002000 /* O32 extended for 64 bit. */
+