syscall: add missing Syscall9 for darwin/amd64

Fixes #10068.

Change-Id: I1f12225ee16b0090b87403931c0bc0157f068309
Reviewed-on: https://go-review.googlesource.com/6555Reviewed-by: Minux Ma <minux@golang.org>

src/syscall/asm_darwin_amd64.s

@@ -9,10 +9,9 @@
 // System call support for AMD64, Darwin
 //
 
-// func Syscall(trap int64, a1, a2, a3 int64) (r1, r2, err int64);
-// func Syscall6(trap int64, a1, a2, a3, a4, a5, a6 int64) (r1, r2, err int64);
 // Trap # in AX, args in DI SI DX, return in AX DX
 
+// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno);
 TEXT	·Syscall(SB),NOSPLIT,$0-56
 	CALL	runtime·entersyscall(SB)
 	MOVQ	a1+8(FP), DI
@@ -37,6 +36,7 @@ ok:
 	CALL	runtime·exitsyscall(SB)
 	RET
 
+// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno);
 TEXT	·Syscall6(SB),NOSPLIT,$0-80
 	CALL	runtime·entersyscall(SB)
 	MOVQ	a1+8(FP), DI
@@ -61,6 +61,41 @@ ok6:
 	CALL	runtime·exitsyscall(SB)
 	RET
 
+// func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	CALL	runtime·entersyscall(SB)
+	MOVQ	trap+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
+	MOVQ	a7+56(FP), R11
+	MOVQ	a8+64(FP), R12
+	MOVQ	a9+72(FP), R13
+	SUBQ	$32, SP
+	MOVQ	R11, 8(SP)
+	MOVQ	R12, 16(SP)
+	MOVQ	R13, 24(SP)
+	ADDQ	$0x2000000, AX
+	SYSCALL
+	JCC	ok9
+	ADDQ	$32, SP
+	MOVQ	$-1, r1+80(FP)
+	MOVQ	$0, r2+88(FP)
+	MOVQ	AX, err+96(FP)
+	CALL	runtime·exitsyscall(SB)
+	RET
+ok9:
+	ADDQ	$32, SP
+	MOVQ	AX, r1+80(FP)
+	MOVQ	DX, r2+88(FP)
+	MOVQ	$0, err+96(FP)
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 TEXT ·RawSyscall(SB),NOSPLIT,$0-56
 	MOVQ	a1+8(FP), DI
 	MOVQ	a2+16(FP), SI
@@ -82,6 +117,7 @@ ok1:
 	MOVQ	$0, err+48(FP)
 	RET
 
+// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
 TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
 	MOVQ	a1+8(FP), DI
 	MOVQ	a2+16(FP), SI

src/syscall/syscall_darwin_amd64.go

@@ -67,4 +67,4 @@ func sendfile(outfd int, infd int, offset *int64, count int) (written int, err e
 	return
 }
 
-func Syscall9(num, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno) // sic
+func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)