1 files changed, 49 insertions, 0 deletions
diff --git a/src/syscall/asm9_unix2_amd64.s b/src/syscall/asm9_unix2_amd64.s
new file mode 100644
index 0000000..7e5e3c5
--- /dev/null
+++ b/src/syscall/asm9_unix2_amd64.s
@@ -0,0 +1,49 @@
+// Copyright 2016 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.
+
+//go:build dragonfly || freebsd
+// +build dragonfly freebsd
+
+#include "textflag.h"
+#include "funcdata.h"
+
+//
+// Syscall9 support for AMD64, DragonFly and FreeBSD
+//
+
+// func Syscall9(trap int64, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int64);
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	CALL	runtime·entersyscall(SB)
+	MOVQ	num+0(FP), AX	// syscall entry
+	MOVQ	a1+8(FP), DI
+	MOVQ	a2+16(FP), SI
+	MOVQ	a3+24(FP), DX
+	MOVQ	a4+32(FP), R10
+	MOVQ	a5+40(FP), R8
+	MOVQ	a6+48(FP), R9
+
+	// shift around the last three arguments so they're at the
+	// top of the stack when the syscall is called.
+	// note that we are scribbling over the Go arguments now.
+	MOVQ	SP, CX	// hide (SP) writes from vet
+	MOVQ	a7+56(FP), R11 // arg 7
+	MOVQ	R11, 8(CX)
+	MOVQ	a8+64(FP), R11 // arg 8
+	MOVQ	R11, 16(CX)
+	MOVQ	a9+72(FP), R11 // arg 9
+	MOVQ	R11, 24(CX)
+
+	SYSCALL
+	JCC	ok9
+	MOVQ	$-1, r1+80(FP)	// r1
+	MOVQ	$0, r2+88(FP)	// r2
+	MOVQ	AX, err+96(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET
+ok9:
+	MOVQ	AX, r1+80(FP)	// r1
+	MOVQ	DX, r2+88(FP)	// r2
+	MOVQ	$0, err+96(FP)	// errno
+	CALL	runtime·exitsyscall(SB)
+	RET