Text file src/pkg/syscall/asm_nacl_arm.s

     1	// Copyright 2014 The Go Authors. All rights reserved.
     2	// Use of this source code is governed by a BSD-style
     3	// license that can be found in the LICENSE file.
     4	
     5	#include "textflag.h"
     6	#include "funcdata.h"
     7	#include "../runtime/syscall_nacl.h"
     8	
     9	//
    10	// System call support for ARM, Native Client
    11	//
    12	
    13	#define NACL_SYSCALL(code) \
    14		MOVW $(0x10000 + ((code)<<5)), R8; BL (R8)
    15	
    16	#define NACL_SYSJMP(code) \
    17		MOVW $(0x10000 + ((code)<<5)), R8; B (R8)
    18	
    19	TEXT ·Syscall(SB),NOSPLIT,$0-28
    20		BL	runtime·entersyscall(SB)
    21		MOVW	trap+0(FP), R8
    22		MOVW	a1+4(FP), R0
    23		MOVW	a2+8(FP), R1
    24		MOVW	a3+12(FP), R2
    25		// more args would use R3, and then stack.
    26		MOVW	$0x10000, R7
    27		ADD	R8<<5, R7
    28		BL	(R7)
    29		CMP	$0, R0
    30		BGE	ok
    31		MOVW	$-1, R1
    32		MOVW	R1, r1+16(FP)
    33		MOVW	R1, r2+20(FP)
    34		RSB	$0, R0
    35		MOVW	R0, err+24(FP)
    36		BL	runtime·exitsyscall(SB)
    37		RET
    38	ok:
    39		MOVW	R0, r1+16(FP)
    40		MOVW	R1, r2+20(FP)
    41		MOVW	$0, R2
    42		MOVW	R2, err+24(FP)
    43		BL	runtime·exitsyscall(SB)
    44		RET

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