00000040  6d a4 3f 3d 42 d7 78 a6  41 49 b7 12 c0 13 00 00  |m.?=B.x.AI......|
00000050  11 ff 01 00 01 00 00 0b  00 04 03 00 01 02 00 17  |................|
00000060  00 00 16 03 01 02 59 0b  00 02 55 00 02 52 00 02  |......Y...U..R..|
00000070  4f 30 82 02 4b 30 82 01  b4 a0 03 02 01 02 02 09  |O0..K0..........|
00000080  00 e8 f0 9d 3f e2 5b ea  a6 30 0d 06 09 2a 86 48  |....?.[..0...*.H|

00000010  47 e4 2d da c5 91 62 e4  7d 49 da 54 a3 79 fb 1d  |G.-...b.}I.T.y..|
00000020  59 49 e8 a6 ab 79 c0 9f  51 f9 d2 63 0d 8c 6b 7f  |YI...y..Q..c..k.|
00000030  b6 77 2d f3 b3 3e 78 86  3a 14 1a ab 3b 5e 23 b2  |.w-..>x.:...;^#.|
00000040  d3 5c b1 2b 5c f4 f0 9d  e2 87 08 d0 2f 24 30 d3  |.\.+\......./$0.|
00000050  05 eb f8 a6 b2 d1 52 00  c3 9e 0b 82 34 3e fd 5a  |......R.....4>.Z|

>>> Flow 4 (server to client)
00000000  14 03 01 00 01 01 16 03  01 00 28 67 3d c4 e9 a6  |..........(g=...|
00000010  bb 99 57 90 eb fa 86 ee  ab 00 08 61 2d c8 50 5b  |..W........a-.P[|
00000020  83 9c ce 83 60 7a 89 33  90 b7 f9 31 e9 37 04 3d  |....`z.3...1.7.=|
00000030  d6 01 44 17 03 01 00 18  0a 1c 6c 75 23 bc b2 e7  |..D.......lu#...|
00000040  30 2d 61 57 d3 a6 a2 72  6a 7a 2d 8a 7b fd 45 67  |0-aW...rjz-.{.Eg|

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
//
// The 5th and 6th arg go at sp+16, sp+20.
// Note that frame size of 20 means that 24 bytes gets reserved on stack.
TEXT ·Syscall6(SB),NOSPLIT,$20-40
	MOVW	num+0(FP), R2	// syscall entry
	MOVW	a1+4(FP), R4
	MOVW	a2+8(FP), R5
	MOVW	a3+12(FP), R6
	MOVW	a4+16(FP), R7
	MOVW	a5+20(FP), R8
	MOVW	a6+24(FP), R9
	MOVW	R8, 16(R29)
	MOVW	R9, 20(R29)

#include "textflag.h"
#include "funcdata.h"

//
// System call support for AMD64 unixes
//

// 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

TEXT	·Syscall(SB),NOSPLIT,$0-56
	CALL	runtime·entersyscall<ABIInternal>(SB)
	MOVQ	trap+0(FP), AX	// syscall entry
	MOVQ	a1+8(FP), DI

// extending across the entire argument area, we incorrectly concatenate
// the bitmaps and end up using 110000001. That bad bitmap causes a6
// to be considered a pointer.
func noPointerArgs(p, q *byte, a0, a1, a2, a3, a4, a5, a6 uintptr) {
	sink = make([]byte, 4096)
	sinkptr = q
	<-throttle
	sinkptr = p
}

var sinkptr *byte

func main() {
	const N = 1000
	for i := 0; i < N; i++ {

	MOVD	ZR, err+48(FP)	// err
	RET

// func Syscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
TEXT	·Syscall6(SB),NOSPLIT,$0-80
	BL	runtime·entersyscall<ABIInternal>(SB)
	MOVD	trap+0(FP), R17	// syscall entry
	MOVD	a1+8(FP), R0
	MOVD	a2+16(FP), R1
	MOVD	a3+24(FP), R2
	MOVD	a4+32(FP), R3
	MOVD	a5+40(FP), R4
	MOVD	a6+48(FP), R5
	SVC	$SYS_syscall
	BCC	ok
	MOVD	$-1, R1
	MOVD	R1, r1+56(FP)	// r1

00000040  16 03 03 02 59 0b 00 02  55 00 02 52 00 02 4f 30  |....Y...U..R..O0|
00000050  82 02 4b 30 82 01 b4 a0  03 02 01 02 02 09 00 e8  |..K0............|
00000060  f0 9d 3f e2 5b ea a6 30  0d 06 09 2a 86 48 86 f7  |..?.[..0...*.H..|
00000070  0d 01 01 0b 05 00 30 1f  31 0b 30 09 06 03 55 04  |......0.1.0...U.|
00000080  0a 13 02 47 6f 31 10 30  0e 06 03 55 04 03 13 07  |...Go1.0...U....|

00000190  e3 63 b1 9c ea dd 47 0a  ca 63 9e 50 9d ca 57 12  |.c....G..c.P..W.|
000001a0  05 9b fc f1 26 a2 5e 18  9b 32 00 38 1f ce a6 58  |....&.^..2.8...X|
000001b0  58 0f 61 e2 44 c2 89 34  cc f4 fd 9a dc 1a 67 a6  |X.a.D..4......g.|
000001c0  e8 b1 fc 9f dc bd 0b 21  01 49 0d 9b e1 40 00 f6  |.......!.I...@..|
000001d0  33 1a 57 c5 84 c1 98 3d  7f 53 d3 4d 2e 04 5e 40  |3.W....=.S.M..^@|

		a5 := e.(I1)
		a6 := e.(I2)
		isfalse(a1 == b1)
		isfalse(a1 == b2)
		isfalse(a2 == b1)
		isfalse(a2 == b2)
		istrue(a1 == a2)
		istrue(a1 == a3)
		istrue(a1 == a4)
		istrue(a1 == a5)
		istrue(a1 == a6)
		istrue(a2 == a3)
		istrue(a2 == a4)
		istrue(a2 == a5)
		istrue(a2 == a6)
		istrue(a3 == a4)
		istrue(a3 == a5)
		istrue(a3 == a6)
		istrue(a4 == a5)
		istrue(a4 == a6)