mirror of https://go.googlesource.com/go
80 lines
2.7 KiB
ArmAsm
80 lines
2.7 KiB
ArmAsm
// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "textflag.h"
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#include "funcdata.h"
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#define REGCTXT R29
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// The frames of each of the two functions below contain two locals, at offsets
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// that are known to the runtime.
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//
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// The first local is a bool called retValid with a whole pointer-word reserved
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// for it on the stack. The purpose of this word is so that the runtime knows
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// whether the stack-allocated return space contains valid values for stack
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// scanning.
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//
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// The second local is an abi.RegArgs value whose offset is also known to the
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// runtime, so that a stack map for it can be constructed, since it contains
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// pointers visible to the GC.
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#define LOCAL_RETVALID 40
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#define LOCAL_REGARGS 48
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// The frame size of the functions below is
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// 32 (args of callReflect) + 8 (bool + padding) + 392 (abi.RegArgs) = 432.
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// makeFuncStub is the code half of the function returned by MakeFunc.
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// See the comment on the declaration of makeFuncStub in makefunc.go
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// for more details.
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// No arg size here, runtime pulls arg map out of the func value.
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TEXT ·makeFuncStub(SB),(NOSPLIT|WRAPPER),$432
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NO_LOCAL_POINTERS
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ADDV $LOCAL_REGARGS, R3, R25 // spillArgs using R25
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JAL runtime·spillArgs(SB)
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MOVV REGCTXT, 32(R3) // save REGCTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS
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MOVV REGCTXT, R4
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MOVV R25, R5
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JAL ·moveMakeFuncArgPtrs<ABIInternal>(SB)
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MOVV 32(R3), REGCTXT // restore REGCTXT
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MOVV REGCTXT, 8(R3)
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MOVV $argframe+0(FP), R20
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MOVV R20, 16(R3)
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MOVV R0, LOCAL_RETVALID(R3)
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ADDV $LOCAL_RETVALID, R3, R20
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MOVV R20, 24(R3)
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ADDV $LOCAL_REGARGS, R3, R20
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MOVV R20, 32(R3)
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JAL ·callReflect(SB)
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ADDV $LOCAL_REGARGS, R3, R25 //unspillArgs using R25
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JAL runtime·unspillArgs(SB)
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RET
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// methodValueCall is the code half of the function returned by makeMethodValue.
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// See the comment on the declaration of methodValueCall in makefunc.go
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// for more details.
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// No arg size here; runtime pulls arg map out of the func value.
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TEXT ·methodValueCall(SB),(NOSPLIT|WRAPPER),$432
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NO_LOCAL_POINTERS
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ADDV $LOCAL_REGARGS, R3, R25 // spillArgs using R25
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JAL runtime·spillArgs(SB)
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MOVV REGCTXT, 32(R3) // save REGCTXT > args of moveMakeFuncArgPtrs < LOCAL_REGARGS
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MOVV REGCTXT, R4
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MOVV R25, R5
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JAL ·moveMakeFuncArgPtrs<ABIInternal>(SB)
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MOVV 32(R3), REGCTXT // restore REGCTXT
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MOVV REGCTXT, 8(R3)
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MOVV $argframe+0(FP), R20
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MOVV R20, 16(R3)
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MOVB R0, LOCAL_RETVALID(R3)
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ADDV $LOCAL_RETVALID, R3, R20
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MOVV R20, 24(R3)
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ADDV $LOCAL_REGARGS, R3, R20
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MOVV R20, 32(R3) // frame size to 32+SP as callreflect args)
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JAL ·callMethod(SB)
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ADDV $LOCAL_REGARGS, R3, R25 // unspillArgs using R25
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JAL runtime·unspillArgs(SB)
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RET
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