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; Licensed to the .NET Foundation under one or more agreements.
; The .NET Foundation licenses this file to you under the MIT license.
; See the LICENSE file in the project root for more information.
; ==++==
;;
;;
;; ==--==
#include "ksarm64.h"
#include "asmconstants.h"
#include "asmmacros.h"
IMPORT VarargPInvokeStubWorker
IMPORT GenericPInvokeCalliStubWorker
; ------------------------------------------------------------------
; Macro to generate PInvoke Stubs.
; $__PInvokeStubFuncName : function which calls the actual stub obtained from VASigCookie
; $__PInvokeGenStubFuncName : function which generates the IL stubs for PInvoke
;
; Params :-
; $FuncPrefix : prefix of the function name for the stub
; Eg. VarargPinvoke, GenericPInvokeCalli
; $VASigCookieReg : register which contains the VASigCookie
; $SaveFPArgs : "Yes" or "No" . For varidic functions FP Args are not present in FP regs
; So need not save FP Args registers for vararg Pinvoke
MACRO
PINVOKE_STUB $FuncPrefix,$VASigCookieReg,$HiddenArg,$SaveFPArgs
GBLS __PInvokeStubFuncName
GBLS __PInvokeGenStubFuncName
GBLS __PInvokeStubWorkerName
IF "$FuncPrefix" == "GenericPInvokeCalli"
__PInvokeStubFuncName SETS "$FuncPrefix":CC:"Helper"
ELSE
__PInvokeStubFuncName SETS "$FuncPrefix":CC:"Stub"
ENDIF
__PInvokeGenStubFuncName SETS "$FuncPrefix":CC:"GenILStub"
__PInvokeStubWorkerName SETS "$FuncPrefix":CC:"StubWorker"
IF "$VASigCookieReg" == "x1"
__PInvokeStubFuncName SETS "$__PInvokeStubFuncName":CC:"_RetBuffArg"
__PInvokeGenStubFuncName SETS "$__PInvokeGenStubFuncName":CC:"_RetBuffArg"
ENDIF
NESTED_ENTRY $__PInvokeStubFuncName
; get the stub
ldr x9, [$VASigCookieReg, #VASigCookie__pNDirectILStub]
; if null goto stub generation
cbz x9, %0
EPILOG_BRANCH_REG x9
0
EPILOG_BRANCH $__PInvokeGenStubFuncName
NESTED_END
NESTED_ENTRY $__PInvokeGenStubFuncName
PROLOG_WITH_TRANSITION_BLOCK 0, $SaveFPArgs
; x2 = Umanaged Target\MethodDesc
mov x2, $HiddenArg
; x1 = VaSigCookie
IF "$VASigCookieReg" != "x1"
mov x1, $VASigCookieReg
ENDIF
; x0 = pTransitionBlock
add x0, sp, #__PWTB_TransitionBlock
; save hidden arg
mov x19, $HiddenArg
bl $__PInvokeStubWorkerName
; restore hidden arg (method desc or unmanaged target)
mov $HiddenArg , x19
EPILOG_WITH_TRANSITION_BLOCK_TAILCALL
EPILOG_BRANCH $__PInvokeStubFuncName
NESTED_END
MEND
TEXTAREA
; ------------------------------------------------------------------
; VarargPInvokeStub & VarargPInvokeGenILStub
; There is a separate stub when the method has a hidden return buffer arg.
;
; in:
; x0 = VASigCookie*
; x12 = MethodDesc *
;
PINVOKE_STUB VarargPInvoke, x0, x12, {false}
; ------------------------------------------------------------------
; GenericPInvokeCalliHelper & GenericPInvokeCalliGenILStub
; Helper for generic pinvoke calli instruction
;
; in:
; x15 = VASigCookie*
; x14 = Unmanaged target
;
PINVOKE_STUB GenericPInvokeCalli, x15, x14, {true}
; ------------------------------------------------------------------
; VarargPInvokeStub_RetBuffArg & VarargPInvokeGenILStub_RetBuffArg
; Vararg PInvoke Stub when the method has a hidden return buffer arg
;
; in:
; x1 = VASigCookie*
; x12 = MethodDesc*
;
PINVOKE_STUB VarargPInvoke, x1, x12, {false}
; Must be at very end of file
END
|
