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asm_amd64.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"
#include "go_asm.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 32
#define LOCAL_REGARGS 40
// 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.
// This frame contains two locals. See the comment above LOCAL_RETVALID.
TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$312
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.
LEAQ LOCAL_REGARGS(SP), R12
CALL runtime·spillArgs(SB)
MOVQ DX, 24(SP) // outside of moveMakeFuncArgPtrs's arg area
MOVQ DX, 0(SP)
MOVQ R12, 8(SP)
CALL ·moveMakeFuncArgPtrs(SB)
MOVQ 24(SP), DX
MOVQ DX, 0(SP)
LEAQ argframe+0(FP), CX
MOVQ CX, 8(SP)
MOVB $0, LOCAL_RETVALID(SP)
LEAQ LOCAL_RETVALID(SP), AX
MOVQ AX, 16(SP)
LEAQ LOCAL_REGARGS(SP), AX
MOVQ AX, 24(SP)
CALL ·callReflect(SB)
LEAQ LOCAL_REGARGS(SP), R12
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.
// This frame contains two locals. See the comment above LOCAL_RETVALID.
TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$312
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.
LEAQ LOCAL_REGARGS(SP), R12
CALL runtime·spillArgs(SB)
MOVQ DX, 24(SP) // outside of moveMakeFuncArgPtrs's arg area
MOVQ DX, 0(SP)
MOVQ R12, 8(SP)
CALL ·moveMakeFuncArgPtrs(SB)
MOVQ 24(SP), DX
MOVQ DX, 0(SP)
LEAQ argframe+0(FP), CX
MOVQ CX, 8(SP)
MOVB $0, LOCAL_RETVALID(SP)
LEAQ LOCAL_RETVALID(SP), AX
MOVQ AX, 16(SP)
LEAQ LOCAL_REGARGS(SP), AX
MOVQ AX, 24(SP)
CALL ·callMethod(SB)
LEAQ LOCAL_REGARGS(SP), R12
CALL runtime·unspillArgs(SB)
RET