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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. //go:build ppc64 || ppc64le #include "textflag.h" #include "funcdata.h" #include "asm_ppc64x.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+FIXED_FRAME #define LOCAL_REGARGS 40+FIXED_FRAME // The frame size of the functions below is // 32 (args of callReflect) + 8 (bool + padding) + 296 (abi.RegArgs) = 336. // 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),$336 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, R1, R20 CALL runtime·spillArgs(SB) MOVD R11, FIXED_FRAME+32(R1) // save R11 MOVD R11, FIXED_FRAME+0(R1) // arg for moveMakeFuncArgPtrs MOVD R20, FIXED_FRAME+8(R1) // arg for local args CALL ·moveMakeFuncArgPtrs(SB) MOVD FIXED_FRAME+32(R1), R11 // restore R11 ctxt MOVD R11, FIXED_FRAME+0(R1) // ctxt (arg0) MOVD $argframe+0(FP), R3 // save arg to callArg MOVD R3, FIXED_FRAME+8(R1) // frame (arg1) ADD $LOCAL_RETVALID, R1, R3 // addr of return flag MOVB R0, (R3) // clear flag MOVD R3, FIXED_FRAME+16(R1) // addr retvalid (arg2) ADD $LOCAL_REGARGS, R1, R3 MOVD R3, FIXED_FRAME+24(R1) // abiregargs (arg3) BL ·callReflect(SB) ADD $LOCAL_REGARGS, R1, R20 // set address of spill area 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),$336 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, R1, R20 CALL runtime·spillArgs(SB) MOVD R11, FIXED_FRAME+0(R1) // arg0 ctxt MOVD R11, FIXED_FRAME+32(R1) // save for later MOVD R20, FIXED_FRAME+8(R1) // arg1 abiregargs CALL ·moveMakeFuncArgPtrs(SB) MOVD FIXED_FRAME+32(R1), R11 // restore ctxt MOVD R11, FIXED_FRAME+0(R1) // set as arg0 MOVD $argframe+0(FP), R3 // frame pointer MOVD R3, FIXED_FRAME+8(R1) // set as arg1 ADD $LOCAL_RETVALID, R1, R3 MOVB $0, (R3) // clear ret flag MOVD R3, FIXED_FRAME+16(R1) // addr of return flag ADD $LOCAL_REGARGS, R1, R3 // addr of abiregargs MOVD R3, FIXED_FRAME+24(R1) // set as arg3 BL ·callMethod(SB) ADD $LOCAL_REGARGS, R1, R20 CALL runtime·unspillArgs(SB) RET