| // 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 路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路spillArgs(SB) | |
| MOVQ DX, 24(SP) // outside of moveMakeFuncArgPtrs's arg area | |
| MOVQ DX, 0(SP) | |
| MOVQ R12, 8(SP) | |
| CALL 路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 路callReflect(SB) | |
| LEAQ LOCAL_REGARGS(SP), R12 | |
| CALL runtime路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 路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路spillArgs(SB) | |
| MOVQ DX, 24(SP) // outside of moveMakeFuncArgPtrs's arg area | |
| MOVQ DX, 0(SP) | |
| MOVQ R12, 8(SP) | |
| CALL 路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 路callMethod(SB) | |
| LEAQ LOCAL_REGARGS(SP), R12 | |
| CALL runtime路unspillArgs(SB) | |
| RET | |