Add RISC-V relocation types.

Reviewed by:	emaste

sys/sys/elf_common.h

@@ -1145,6 +1145,56 @@ typedef struct {
 #define	R_PPC_EMB_BIT_FLD	115
 #define	R_PPC_EMB_RELSDA	116
 
+/*
+ * RISC-V relocation types.
+ */
+
+/* Relocation types used by the dynamic linker. */
+#define	R_RISCV_NONE		0
+#define	R_RISCV_32		1
+#define	R_RISCV_64		2
+#define	R_RISCV_RELATIVE	3
+#define	R_RISCV_COPY		4
+#define	R_RISCV_JUMP_SLOT	5
+#define	R_RISCV_TLS_DTPMOD32	6
+#define	R_RISCV_TLS_DTPMOD64	7
+#define	R_RISCV_TLS_DTPREL32	8
+#define	R_RISCV_TLS_DTPREL64	9
+#define	R_RISCV_TLS_TPREL32	10
+#define	R_RISCV_TLS_TPREL64	11
+
+/* Relocation types not used by the dynamic linker. */
+#define	R_RISCV_BRANCH		16
+#define	R_RISCV_JAL		17
+#define	R_RISCV_CALL		18
+#define	R_RISCV_CALL_PLT	19
+#define	R_RISCV_GOT_HI20	20
+#define	R_RISCV_TLS_GOT_HI20	21
+#define	R_RISCV_TLS_GD_HI20	22
+#define	R_RISCV_PCREL_HI20	23
+#define	R_RISCV_PCREL_LO12_I	24
+#define	R_RISCV_PCREL_LO12_S	25
+#define	R_RISCV_HI20		26
+#define	R_RISCV_LO12_I		27
+#define	R_RISCV_LO12_S		28
+#define	R_RISCV_TPREL_HI20	29
+#define	R_RISCV_TPREL_LO12_I	30
+#define	R_RISCV_TPREL_LO12_S	31
+#define	R_RISCV_TPREL_ADD	32
+#define	R_RISCV_ADD8		33
+#define	R_RISCV_ADD16		34
+#define	R_RISCV_ADD32		35
+#define	R_RISCV_ADD64		36
+#define	R_RISCV_SUB8		37
+#define	R_RISCV_SUB16		38
+#define	R_RISCV_SUB32		39
+#define	R_RISCV_SUB64		40
+#define	R_RISCV_GNU_VTINHERIT	41
+#define	R_RISCV_GNU_VTENTRY	42
+#define	R_RISCV_ALIGN		43
+#define	R_RISCV_RVC_BRANCH	44
+#define	R_RISCV_RVC_JUMP	45
+
 #define	R_SPARC_NONE		0
 #define	R_SPARC_8		1
 #define	R_SPARC_16		2