i think it works

code/boot/include/riscv64/efisetjmp_arch.h

@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0+ OR BSD-2-Clause */
+
+#ifndef GNU_EFI_RISCV64_SETJMP_H
+#define GNU_EFI_RISCV64_SETJMP_H
+
+#define JMPBUF_ALIGN 8
+
+typedef struct {
+	/* GP regs */
+	UINT64	s0;
+	UINT64	s1;
+	UINT64	s2;
+	UINT64	s3;
+	UINT64	s4;
+	UINT64	s5;
+	UINT64	s6;
+	UINT64	s7;
+	UINT64	s8;
+	UINT64	s9;
+	UINT64	s10;
+	UINT64	s11;
+	UINT64	sp;
+	UINT64	ra;
+
+	/* FP regs */
+	UINT64	fs0;
+	UINT64	fs1;
+	UINT64	fs2;
+	UINT64	fs3;
+	UINT64	fs4;
+	UINT64	fs5;
+	UINT64	fs6;
+	UINT64	fs7;
+	UINT64	fs8;
+	UINT64	fs9;
+	UINT64	fs10;
+	UINT64	fs11;
+} EFI_ALIGN(JMPBUF_ALIGN) jmp_buf[1];
+
+#endif /* GNU_EFI_RISCV64_SETJMP_H */