mirror of https://go.googlesource.com/go
84 lines
3.3 KiB
ArmAsm
84 lines
3.3 KiB
ArmAsm
// Copyright 2012 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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//go:build ppc64 || ppc64le
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#include "textflag.h"
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#include "funcdata.h"
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#include "asm_ppc64x.h"
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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 32+FIXED_FRAME
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#define LOCAL_REGARGS 40+FIXED_FRAME
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// The frame size of the functions below is
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// 32 (args of callReflect) + 8 (bool + padding) + 296 (abi.RegArgs) = 336.
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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),$336
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NO_LOCAL_POINTERS
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// NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this
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// frame is specially handled in the runtime. See the comment above LOCAL_RETVALID.
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ADD $LOCAL_REGARGS, R1, R20
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CALL runtime·spillArgs(SB)
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MOVD R11, FIXED_FRAME+32(R1) // save R11
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MOVD R11, FIXED_FRAME+0(R1) // arg for moveMakeFuncArgPtrs
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MOVD R20, FIXED_FRAME+8(R1) // arg for local args
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CALL ·moveMakeFuncArgPtrs(SB)
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MOVD FIXED_FRAME+32(R1), R11 // restore R11 ctxt
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MOVD R11, FIXED_FRAME+0(R1) // ctxt (arg0)
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MOVD $argframe+0(FP), R3 // save arg to callArg
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MOVD R3, FIXED_FRAME+8(R1) // frame (arg1)
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ADD $LOCAL_RETVALID, R1, R3 // addr of return flag
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MOVB R0, (R3) // clear flag
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MOVD R3, FIXED_FRAME+16(R1) // addr retvalid (arg2)
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ADD $LOCAL_REGARGS, R1, R3
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MOVD R3, FIXED_FRAME+24(R1) // abiregargs (arg3)
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BL ·callReflect(SB)
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ADD $LOCAL_REGARGS, R1, R20 // set address of spill area
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CALL 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),$336
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NO_LOCAL_POINTERS
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// NO_LOCAL_POINTERS is a lie. The stack map for the two locals in this
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// frame is specially handled in the runtime. See the comment above LOCAL_RETVALID.
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ADD $LOCAL_REGARGS, R1, R20
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CALL runtime·spillArgs(SB)
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MOVD R11, FIXED_FRAME+0(R1) // arg0 ctxt
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MOVD R11, FIXED_FRAME+32(R1) // save for later
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MOVD R20, FIXED_FRAME+8(R1) // arg1 abiregargs
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CALL ·moveMakeFuncArgPtrs(SB)
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MOVD FIXED_FRAME+32(R1), R11 // restore ctxt
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MOVD R11, FIXED_FRAME+0(R1) // set as arg0
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MOVD $argframe+0(FP), R3 // frame pointer
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MOVD R3, FIXED_FRAME+8(R1) // set as arg1
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ADD $LOCAL_RETVALID, R1, R3
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MOVB $0, (R3) // clear ret flag
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MOVD R3, FIXED_FRAME+16(R1) // addr of return flag
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ADD $LOCAL_REGARGS, R1, R3 // addr of abiregargs
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MOVD R3, FIXED_FRAME+24(R1) // set as arg3
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BL ·callMethod(SB)
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ADD $LOCAL_REGARGS, R1, R20
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CALL runtime·unspillArgs(SB)
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RET
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