| // Copyright 2016 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/callMethod) + 8 (bool + padding) + 264 (abi.RegArgs) = 304. | |
| // 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 路makeFuncStub(SB),(NOSPLIT|WRAPPER),$304 | |
| NO_LOCAL_POINTERS | |
| ADD $LOCAL_REGARGS, R15, R10 // spillArgs using R10 | |
| BL runtime路spillArgs(SB) | |
| MOVD R12, 32(R15) // save context reg R12 > args of moveMakeFuncArgPtrs < LOCAL_REGARGS | |
| #ifdef GOEXPERIMENT_regabiargs | |
| MOVD R12, R2 | |
| MOVD R10, R3 | |
| #else | |
| MOVD R12, 8(R15) | |
| MOVD R10, 16(R15) | |
| #endif | |
| BL 路moveMakeFuncArgPtrs<ABIInternal>(SB) | |
| MOVD 32(R15), R12 // restore context reg R12 | |
| MOVD R12, 8(R15) | |
| MOVD $argframe+0(FP), R1 | |
| MOVD R1, 16(R15) | |
| MOVB $0, LOCAL_RETVALID(R15) | |
| ADD $LOCAL_RETVALID, R15, R1 | |
| MOVD R1, 24(R15) | |
| ADD $LOCAL_REGARGS, R15, R1 | |
| MOVD R1, 32(R15) | |
| BL 路callReflect(SB) | |
| ADD $LOCAL_REGARGS, R15, R10 // unspillArgs using R10 | |
| BL 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. | |
| TEXT 路methodValueCall(SB),(NOSPLIT|WRAPPER),$304 | |
| NO_LOCAL_POINTERS | |
| ADD $LOCAL_REGARGS, R15, R10 // spillArgs using R10 | |
| BL runtime路spillArgs(SB) | |
| MOVD R12, 32(R15) // save context reg R12 > args of moveMakeFuncArgPtrs < LOCAL_REGARGS | |
| #ifdef GOEXPERIMENT_regabiargs | |
| MOVD R12, R2 | |
| MOVD R10, R3 | |
| #else | |
| MOVD R12, 8(R15) | |
| MOVD R10, 16(R15) | |
| #endif | |
| BL 路moveMakeFuncArgPtrs<ABIInternal>(SB) | |
| MOVD 32(R15), R12 // restore context reg R12 | |
| MOVD R12, 8(R15) | |
| MOVD $argframe+0(FP), R1 | |
| MOVD R1, 16(R15) | |
| MOVB $0, LOCAL_RETVALID(R15) | |
| ADD $LOCAL_RETVALID, R15, R1 | |
| MOVD R1, 24(R15) | |
| ADD $LOCAL_REGARGS, R15, R1 | |
| MOVD R1, 32(R15) | |
| BL 路callMethod(SB) | |
| ADD $LOCAL_REGARGS, R15, R10 // unspillArgs using R10 | |
| BL runtime路unspillArgs(SB) | |
| RET | |