1 files changed, 125 insertions, 0 deletions
diff --git a/src/syscall/asm_freebsd_riscv64.s b/src/syscall/asm_freebsd_riscv64.s
new file mode 100644
index 0000000..dc21f76
--- /dev/null
+++ b/src/syscall/asm_freebsd_riscv64.s
@@ -0,0 +1,125 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+//
+// System calls for riscv64, FreeBSD
+//
+
+// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64)
+TEXT ·Syscall(SB),NOSPLIT,$0-56
+	CALL	runtime·entersyscall(SB)
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	trap+0(FP), T0	// syscall entry
+	ECALL
+	BNE	T0, ZERO, err
+	MOV	A0, r1+32(FP)	// r1
+	MOV	A1, r2+40(FP)	// r2
+	MOV	ZERO, err+48(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+err:
+	MOV	$-1, T0
+	MOV	T0, r1+32(FP)	// r1
+	MOV	ZERO, r2+40(FP)	// r2
+	MOV	A0, err+48(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+
+// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	CALL	runtime·entersyscall(SB)
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	a4+32(FP), A3
+	MOV	a5+40(FP), A4
+	MOV	a6+48(FP), A5
+	MOV	trap+0(FP), T0	// syscall entry
+	ECALL
+	BNE	T0, ZERO, err
+	MOV	A0, r1+56(FP)	// r1
+	MOV	A1, r2+64(FP)	// r2
+	MOV	ZERO, err+72(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+err:
+	MOV	$-1, T0
+	MOV	T0, r1+56(FP)	// r1
+	MOV	ZERO, r2+64(FP)	// r2
+	MOV	A0, err+72(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	trap+0(FP), T0	// syscall entry
+	ECALL
+	BNE	T0, ZERO, err
+	MOV	A0, r1+32(FP)	// r1
+	MOV	A1, r2+40(FP)	// r2
+	MOV	ZERO, err+48(FP)	// errno
+	RET
+err:
+	MOV	$-1, T0
+	MOV	T0, r1+32(FP)	// r1
+	MOV	ZERO, r2+40(FP)	// r2
+	MOV	A0, err+48(FP)	// errno
+	RET
+
+// func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	a4+32(FP), A3
+	MOV	a5+40(FP), A4
+	MOV	a6+48(FP), A5
+	MOV	trap+0(FP), T0	// syscall entry
+	ECALL
+	BNE	T0, ZERO, err
+	MOV	A0, r1+56(FP)	// r1
+	MOV	A1, r2+64(FP)	// r2
+	MOV	ZERO, err+72(FP)	// errno
+	RET
+err:
+	MOV	$-1, T0
+	MOV	T0, r1+56(FP)	// r1
+	MOV	ZERO, r2+64(FP)	// r2
+	MOV	A0, err+72(FP)	// errno
+	RET
+
+// Actually Syscall7
+// func Syscall9(num uintptr, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr)
+TEXT ·Syscall9(SB),NOSPLIT,$0-104
+	CALL	runtime·entersyscall(SB)
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	a4+32(FP), A3
+	MOV	a5+40(FP), A4
+	MOV	a6+48(FP), A5
+	MOV	a7+56(FP), A6
+	MOV	num+0(FP), T0	// syscall entry
+	ECALL
+	BNE	T0, ZERO, err
+	MOV	A0, r1+80(FP)	// r1
+	MOV	A1, r2+88(FP)	// r2
+	MOV	ZERO, err+96(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+err:
+	MOV	$-1, T0
+	MOV	T0, r1+80(FP)	// r1
+	MOV	ZERO, r2+88(FP)	// r2
+	MOV	A0, err+96(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET