feat(asm): emit the riscv64 local-exec TLS sequence

Assisted-by: GLM 5.3

asm/goobjriscv.go

@@ -30,6 +30,8 @@ func (img *Image) GOObjectRISCV(pkgPath, srcPath string) ([]byte, error) {
 			return relocRISCVPcrelStype, 8
 		case RelRISCVJal:
 			return relocRISCVJal, 4
+		case RelRISCVTLSLE:
+			return relocRISCVTLSLE, 8
 		default:
 			return relocRISCVPcrelItype, 8
 		}
@@ -38,11 +40,13 @@ func (img *Image) GOObjectRISCV(pkgPath, srcPath string) ([]byte, error) {
 
 // RISC-V relocation types (cmd/internal/objabi).  The Go linker applies
 // R_RISCV_PCREL_ITYPE/STYPE to an AUIPC + I/S-type instruction pair as a
-// single 8-byte field; R_RISCV_JAL covers a single 4-byte J-type instruction.
+// single 8-byte field; R_RISCV_JAL covers a single 4-byte J-type instruction;
+// R_RISCV_TLS_LE covers the LUI + I-type pair of a local-exec TLS reference.
 const (
 	relocRISCVJal        = 59 // R_RISCV_JAL
 	relocRISCVPcrelItype = 62 // R_RISCV_PCREL_ITYPE
 	relocRISCVPcrelStype = 63 // R_RISCV_PCREL_STYPE
+	relocRISCVTLSLE      = 65 // R_RISCV_TLS_LE
 )
 
 // toolchainObjectPreambleRISCV returns the "go object ...\n!\n" header