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asm_arm64.s
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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "textflag.h"
#include "funcdata.h"
// The frames of each of the two functions below contain two locals, at offsets
// that are known to the runtime.
//
// The first local is a bool called retValid with a whole pointer-word reserved
// for it on the stack. The purpose of this word is so that the runtime knows
// whether the stack-allocated return space contains valid values for stack
// scanning.
//
// The second local is an abi.RegArgs value whose offset is also known to the
// runtime, so that a stack map for it can be constructed, since it contains
// pointers visible to the GC.
#define LOCAL_RETVALID 40
#define LOCAL_REGARGS 48
// The frame size of the functions below is
// 32 (args of callReflect) + 8 (bool + padding) + 392 (abi.RegArgs) = 432.
// makeFuncStub is the code half of the function returned by MakeFunc.
// See the comment on the declaration of makeFuncStub in makefunc.go
// for more details.
// No arg size here, runtime pulls arg map out of the func value.
TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$432
NO_LOCAL_POINTERS
// NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this
// frame is specially handled in the runtime. See the comment above LOCAL_RETVALID.
ADD $LOCAL_REGARGS, RSP, R20
CALL runtime·spillArgs(SB)
MOVD R26, 32(RSP) // outside of moveMakeFuncArgPtrs's arg area
MOVD R26, R0
MOVD R20, R1
CALL ·moveMakeFuncArgPtrs<ABIInternal>(SB)
MOVD 32(RSP), R26
MOVD R26, 8(RSP)
MOVD $argframe+0(FP), R3
MOVD R3, 16(RSP)
MOVB $0, LOCAL_RETVALID(RSP)
ADD $LOCAL_RETVALID, RSP, R3
MOVD R3, 24(RSP)
ADD $LOCAL_REGARGS, RSP, R3
MOVD R3, 32(RSP)
CALL ·callReflect(SB)
ADD $LOCAL_REGARGS, RSP, R20
CALL runtime·unspillArgs(SB)
RET
// methodValueCall is the code half of the function returned by makeMethodValue.
// See the comment on the declaration of methodValueCall in makefunc.go
// for more details.
// No arg size here; runtime pulls arg map out of the func value.
TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$432
NO_LOCAL_POINTERS
// NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this
// frame is specially handled in the runtime. See the comment above LOCAL_RETVALID.
ADD $LOCAL_REGARGS, RSP, R20
CALL runtime·spillArgs(SB)
MOVD R26, 32(RSP) // outside of moveMakeFuncArgPtrs's arg area
MOVD R26, R0
MOVD R20, R1
CALL ·moveMakeFuncArgPtrs<ABIInternal>(SB)
MOVD 32(RSP), R26
MOVD R26, 8(RSP)
MOVD $argframe+0(FP), R3
MOVD R3, 16(RSP)
MOVB $0, LOCAL_RETVALID(RSP)
ADD $LOCAL_RETVALID, RSP, R3
MOVD R3, 24(RSP)
ADD $LOCAL_REGARGS, RSP, R3
MOVD R3, 32(RSP)
CALL ·callMethod(SB)
ADD $LOCAL_REGARGS, RSP, R20
CALL runtime·unspillArgs(SB)
RET