syscall: use name+(NN)FP on linux/arm

Generated with a modified version of go vet and tested on android.

Change-Id: I1ff20135c5ab9de5a6dbf76ea2991167271ee70d
Reviewed-on: https://go-review.googlesource.com/2815Reviewed-by: Ian Lance Taylor <iant@golang.org>

src/syscall/asm_linux_arm.s

@@ -15,10 +15,10 @@
 
 TEXT	·Syscall(SB),NOSPLIT,$0-28
 	BL		runtime·entersyscall(SB)
-	MOVW	4(SP), R7
-	MOVW	8(SP), R0
-	MOVW	12(SP), R1
-	MOVW	16(SP), R2
+	MOVW	trap+0(FP), R7
+	MOVW	a1+4(FP), R0
+	MOVW	a2+8(FP), R1
+	MOVW	a3+12(FP), R2
 	MOVW	$0, R3
 	MOVW	$0, R4
 	MOVW	$0, R5
@@ -27,18 +27,18 @@ TEXT	·Syscall(SB),NOSPLIT,$0-28
 	CMP		R1, R0
 	BLS		ok
 	MOVW	$-1, R1
-	MOVW	R1, 20(SP)	// r1
+	MOVW	R1, r1+16(FP)
 	MOVW	$0, R2
-	MOVW	R2, 24(SP)	// r2
+	MOVW	R2, r2+20(FP)
 	RSB		$0, R0, R0
-	MOVW	R0, 28(SP)	// errno
+	MOVW	R0, err+24(FP)
 	BL		runtime·exitsyscall(SB)
 	RET
 ok:
-	MOVW	R0, 20(SP) // r1
+	MOVW	R0, r1+16(FP)
 	MOVW	$0, R0
-	MOVW	R0, 24(SP)	// r2
-	MOVW	R0, 28(SP)	// errno
+	MOVW	R0, r2+20(FP)
+	MOVW	R0, err+24(FP)
 	BL		runtime·exitsyscall(SB)
 	RET
 
@@ -46,59 +46,59 @@ ok:
 // Actually Syscall5 but the rest of the code expects it to be named Syscall6.
 TEXT	·Syscall6(SB),NOSPLIT,$0-40
 	BL		runtime·entersyscall(SB)
-	MOVW	4(SP), R7	// syscall entry
-	MOVW	8(SP), R0
-	MOVW	12(SP), R1
-	MOVW	16(SP), R2
-	MOVW	20(SP), R3
-	MOVW	24(SP), R4
-	MOVW	28(SP), R5
+	MOVW	trap+0(FP), R7	// syscall entry
+	MOVW	a1+4(FP), R0
+	MOVW	a2+8(FP), R1
+	MOVW	a3+12(FP), R2
+	MOVW	a4+16(FP), R3
+	MOVW	a5+20(FP), R4
+	MOVW	a6+24(FP), R5
 	SWI		$0
 	MOVW	$0xfffff001, R6
 	CMP		R6, R0
 	BLS		ok6
 	MOVW	$-1, R1
-	MOVW	R1, 32(SP)	// r1
+	MOVW	R1, r1+28(FP)
 	MOVW	$0, R2
-	MOVW	R2, 36(SP)	// r2
+	MOVW	R2, r2+32(FP)
 	RSB		$0, R0, R0
-	MOVW	R0, 40(SP)	// errno
+	MOVW	R0, err+36(FP)
 	BL		runtime·exitsyscall(SB)
 	RET
 ok6:
-	MOVW	R0, 32(SP) // r1
-	MOVW	R1, 36(SP)	// r2
+	MOVW	R0, r1+28(FP)
+	MOVW	R1, r2+32(FP)
 	MOVW	$0, R0
-	MOVW	R0, 40(SP)	// errno
+	MOVW	R0, err+36(FP)
 	BL		runtime·exitsyscall(SB)
 	RET
 
 // func RawSyscall6(trap uintptr, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr);
 // Actually RawSyscall5 but the rest of the code expects it to be named RawSyscall6.
 TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
-	MOVW	4(SP), R7	// syscall entry
-	MOVW	8(SP), R0
-	MOVW	12(SP), R1
-	MOVW	16(SP), R2
-	MOVW	20(SP), R3
-	MOVW	24(SP), R4
-	MOVW	28(SP), R5
+	MOVW	trap+0(FP), R7	// syscall entry
+	MOVW	a1+4(FP), R0
+	MOVW	a2+8(FP), R1
+	MOVW	a3+12(FP), R2
+	MOVW	a4+16(FP), R3
+	MOVW	a5+20(FP), R4
+	MOVW	a6+24(FP), R5
 	SWI		$0
 	MOVW	$0xfffff001, R6
 	CMP		R6, R0
 	BLS		ok2
 	MOVW	$-1, R1
-	MOVW	R1, 32(SP)	// r1
+	MOVW	R1, r1+28(FP)
 	MOVW	$0, R2
-	MOVW	R2, 36(SP)	// r2
+	MOVW	R2, r2+32(FP)
 	RSB		$0, R0, R0
-	MOVW	R0, 40(SP)	// errno
+	MOVW	R0, err+36(FP)
 	RET
 ok2:
-	MOVW	R0, 32(SP) // r1
-	MOVW	R1, 36(SP)	// r2
+	MOVW	R0, r1+28(FP)
+	MOVW	R1, r2+32(FP)
 	MOVW	$0, R0
-	MOVW	R0, 40(SP)	// errno
+	MOVW	R0, err+36(FP)
 	RET
 
 #define SYS__LLSEEK 140  /* from zsysnum_linux_arm.go */
@@ -110,50 +110,50 @@ ok2:
 TEXT ·seek(SB),NOSPLIT,$0-28
 	BL	runtime·entersyscall(SB)
 	MOVW	$SYS__LLSEEK, R7	// syscall entry
-	MOVW	4(SP), R0	// fd
-	MOVW	12(SP), R1	// offset-high
-	MOVW	8(SP), R2	// offset-low
-	MOVW	$20(SP), R3
-	MOVW	16(SP), R4	// whence
+	MOVW	fd+0(FP), R0
+	MOVW	offset_hi+8(FP), R1
+	MOVW	offset_lo+4(FP), R2
+	MOVW	$newoffset_lo+16(FP), R3
+	MOVW	whence+12(FP), R4
 	SWI	$0
 	MOVW	$0xfffff001, R6
 	CMP	R6, R0
 	BLS	okseek
 	MOVW	$0, R1
-	MOVW	R1, 20(SP)
-	MOVW	R1, 24(SP)
+	MOVW	R1, newoffset_lo+16(FP)
+	MOVW	R1, newoffset_hi+20(FP)
 	RSB	$0, R0, R0
-	MOVW	R0, 28(SP)	// errno
+	MOVW	R0, err+24(FP)
 	BL	runtime·exitsyscall(SB)
 	RET
 okseek:
 	// system call filled in newoffset already
 	MOVW	$0, R0
-	MOVW	R0, 28(SP)	// errno
+	MOVW	R0, err+24(FP)
 	BL	runtime·exitsyscall(SB)
 	RET	
 
 // func RawSyscall(trap uintptr, a1, a2, a3 uintptr) (r1, r2, err uintptr);
 TEXT ·RawSyscall(SB),NOSPLIT,$0-28
-	MOVW	4(SP), R7	// syscall entry
-	MOVW	8(SP), R0
-	MOVW	12(SP), R1
-	MOVW	16(SP), R2
+	MOVW	trap+0(FP), R7	// syscall entry
+	MOVW	a1+4(FP), R0
+	MOVW	a2+8(FP), R1
+	MOVW	a3+12(FP), R2
 	SWI		$0
 	MOVW	$0xfffff001, R1
 	CMP		R1, R0
 	BLS		ok1
 	MOVW	$-1, R1
-	MOVW	R1, 20(SP)	// r1
+	MOVW	R1, r1+16(FP)
 	MOVW	$0, R2
-	MOVW	R2, 24(SP)	// r2
+	MOVW	R2, r2+20(FP)
 	RSB		$0, R0, R0
-	MOVW	R0, 28(SP)	// errno
+	MOVW	R0, err+24(FP)
 	RET
 ok1:
-	MOVW	R0, 20(SP) // r1
+	MOVW	R0, r1+16(FP)
 	MOVW	$0, R0
-	MOVW	R0, 24(SP)	// r2
-	MOVW	R0, 28(SP)	// errno
+	MOVW	R0, r2+20(FP)
+	MOVW	R0, err+24(FP)
 	RET