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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"
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; CallingConventionCoverter Helpers ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
POINTER_SIZE equ 0x08
;;
;; Note: The "__jmpstub__" prefix is used to indicate to debugger
;; that it must step-through this stub when it encounters it while
;; stepping.
;;
;;
;; void CallingConventionConverter_ReturnThunk()
;;
LEAF_ENTRY CallingConventionConverter_ReturnThunk
ret
LEAF_END CallingConventionConverter_ReturnThunk
;;
;; __jmpstub__CallingConventionConverter_CommonCallingStub
;;
;; struct CallingConventionConverter_CommonCallingStub_PointerData
;; {
;; void *ManagedCallConverterThunk;
;; void *UniversalThunk;
;; }
;;
;; struct CommonCallingStubInputData
;; {
;; ULONG_PTR CallingConventionId;
;; CallingConventionConverter_CommonCallingStub_PointerData *commonData; // Only the ManagedCallConverterThunk field is used
;; // However, it is specified just like other platforms, so the behavior of the common
;; // calling stub is easier to debug
;; }
;;
;; xip0 - Points at CommonCallingStubInputData
;;
;;
LEAF_ENTRY __jmpstub__CallingConventionConverter_CommonCallingStub
ldr xip1, [xip0] ; put CallingConventionId into xip1 as "parameter" to universal transition thunk
ldr xip0, [xip0, #POINTER_SIZE] ; get pointer to CallingConventionConverter_CommonCallingStub_PointerData into xip0
ldr x12, [xip0, #POINTER_SIZE] ; get address of UniversalTransitionThunk (which we'll tailcall to later)
ldr xip0, [xip0] ; get address of ManagedCallConverterThunk (target for universal thunk to call)
br x12
LEAF_END __jmpstub__CallingConventionConverter_CommonCallingStub
;;
;; void CallingConventionConverter_GetStubs(IntPtr *returnVoidStub, IntPtr *returnIntegerStub, IntPtr *commonCallingStub)
;;
LEAF_ENTRY CallingConventionConverter_GetStubs
ldr x12, =CallingConventionConverter_ReturnThunk
str x12, [x0] ;; ARM doesn't need different return thunks.
str x12, [x1]
ldr x12, =__jmpstub__CallingConventionConverter_CommonCallingStub
str x12, [x2]
ret
LEAF_END CallingConventionConverter_GetStubs
END
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