| // 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 |
