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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