runtime/cgo: add context argument to crosscall2 on mips64

Change-Id: Id018516075842afd8af12fbf207763a851d5a851
Reviewed-on: https://go-review.googlesource.com/22754Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/runtime/cgo/asm_mips64x.s

@@ -7,38 +7,39 @@
 #include "textflag.h"
 
 /*
- * void crosscall2(void (*fn)(void*, int32), void*, int32)
+ * void crosscall2(void (*fn)(void*, int32, uintptr), void*, int32, uintptr)
  * Save registers and call fn with two arguments.
  */
 TEXT crosscall2(SB),NOSPLIT,$-8
 	/*
 	 * We still need to save all callee save register as before, and then
-	 *  push 2 args for fn (R5 and R6).
+	 *  push 3 args for fn (R5, R6, R7).
 	 * Also note that at procedure entry in gc world, 8(R29) will be the
 	 *  first arg.
 	 */
-	ADDV	$(-8*22), R29
+	ADDV	$(-8*23), R29
 	MOVV	R5, (8*1)(R29)
 	MOVV	R6, (8*2)(R29)
-	MOVV	R16, (8*3)(R29)
-	MOVV	R17, (8*4)(R29)
-	MOVV	R18, (8*5)(R29)
-	MOVV	R19, (8*6)(R29)
-	MOVV	R20, (8*7)(R29)
-	MOVV	R21, (8*8)(R29)
-	MOVV	R22, (8*9)(R29)
-	MOVV	R23, (8*10)(R29)
-	MOVV	RSB, (8*11)(R29)
-	MOVV	g, (8*12)(R29)
-	MOVV	R31, (8*13)(R29)
-	MOVD	F24, (8*14)(R29)
-	MOVD	F25, (8*15)(R29)
-	MOVD	F26, (8*16)(R29)
-	MOVD	F27, (8*17)(R29)
-	MOVD	F28, (8*18)(R29)
-	MOVD	F29, (8*19)(R29)
-	MOVD	F30, (8*20)(R29)
-	MOVD	F31, (8*21)(R29)
+	MOVV	R7, (8*3)(R29)
+	MOVV	R16, (8*4)(R29)
+	MOVV	R17, (8*5)(R29)
+	MOVV	R18, (8*6)(R29)
+	MOVV	R19, (8*7)(R29)
+	MOVV	R20, (8*8)(R29)
+	MOVV	R21, (8*9)(R29)
+	MOVV	R22, (8*10)(R29)
+	MOVV	R23, (8*11)(R29)
+	MOVV	RSB, (8*12)(R29)
+	MOVV	g, (8*13)(R29)
+	MOVV	R31, (8*14)(R29)
+	MOVD	F24, (8*15)(R29)
+	MOVD	F25, (8*16)(R29)
+	MOVD	F26, (8*17)(R29)
+	MOVD	F27, (8*18)(R29)
+	MOVD	F28, (8*19)(R29)
+	MOVD	F29, (8*20)(R29)
+	MOVD	F30, (8*21)(R29)
+	MOVD	F31, (8*22)(R29)
 
 	// Initialize Go ABI environment
 	// prepare SB register = PC & 0xffffffff00000000
@@ -51,24 +52,25 @@ TEXT crosscall2(SB),NOSPLIT,$-8
 
 	MOVV	(8*1)(R29), R5
 	MOVV	(8*2)(R29), R6
-	MOVV	(8*3)(R29), R16
-	MOVV	(8*4)(R29), R17
-	MOVV	(8*5)(R29), R18
-	MOVV	(8*6)(R29), R19
-	MOVV	(8*7)(R29), R20
-	MOVV	(8*8)(R29), R21
-	MOVV	(8*9)(R29), R22
-	MOVV	(8*10)(R29), R23
-	MOVV	(8*11)(R29), RSB
-	MOVV	(8*12)(R29), g
-	MOVV	(8*13)(R29), R31
-	MOVD	(8*14)(R29), F24
-	MOVD	(8*15)(R29), F25
-	MOVD	(8*16)(R29), F26
-	MOVD	(8*17)(R29), F27
-	MOVD	(8*18)(R29), F28
-	MOVD	(8*19)(R29), F29
-	MOVD	(8*20)(R29), F30
-	MOVD	(8*21)(R29), F31
-	ADDV	$(8*22), R29
+	MOVV	(8*3)(R29), R7
+	MOVV	(8*4)(R29), R16
+	MOVV	(8*5)(R29), R17
+	MOVV	(8*6)(R29), R18
+	MOVV	(8*7)(R29), R19
+	MOVV	(8*8)(R29), R20
+	MOVV	(8*9)(R29), R21
+	MOVV	(8*10)(R29), R22
+	MOVV	(8*11)(R29), R23
+	MOVV	(8*12)(R29), RSB
+	MOVV	(8*13)(R29), g
+	MOVV	(8*14)(R29), R31
+	MOVD	(8*15)(R29), F24
+	MOVD	(8*16)(R29), F25
+	MOVD	(8*17)(R29), F26
+	MOVD	(8*18)(R29), F27
+	MOVD	(8*19)(R29), F28
+	MOVD	(8*20)(R29), F29
+	MOVD	(8*21)(R29), F30
+	MOVD	(8*22)(R29), F31
+	ADDV	$(8*23), R29
 	RET