// 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 "asmconstants.h" #include "unixasmmacros.inc" // LPVOID __stdcall GetCurrentIP(void)// LEAF_ENTRY GetCurrentIP, _TEXT mov x0, lr ret lr LEAF_END GetCurrentIP, _TEXT // LPVOID __stdcall GetCurrentSP(void)// LEAF_ENTRY GetCurrentSP, _TEXT mov x0, sp ret lr LEAF_END GetCurrentSP, _TEXT //----------------------------------------------------------------------------- // This routine captures the machine state. It is used by helper method frame //----------------------------------------------------------------------------- //void LazyMachStateCaptureState(struct LazyMachState *pState)// LEAF_ENTRY LazyMachStateCaptureState, _TEXT // marks that this is not yet valid mov w1, #0 str w1, [x0, #MachState__isValid] str lr, [x0, #LazyMachState_captureIp] // str instruction does not save sp register directly so move to temp register mov x1, sp str x1, [x0, #LazyMachState_captureSp] // save non-volatile registers that can contain object references add x1, x0, #LazyMachState_captureX19_X29 stp x19, x20, [x1, #(16*0)] stp x21, x22, [x1, #(16*1)] stp x23, x24, [x1, #(16*2)] stp x25, x26, [x1, #(16*3)] stp x27, x28, [x1, #(16*4)] str x29, [x1, #(16*5)] ret lr LEAF_END LazyMachStateCaptureState, _TEXT // // If a preserved register were pushed onto the stack between // the managed caller and the H_M_F, ptrX19_X29 will point to its // location on the stack and it would have been updated on the // stack by the GC already and it will be popped back into the // appropriate register when the appropriate epilog is run. // // Otherwise, the register is preserved across all the code // in this HCALL or FCALL, so we need to update those registers // here because the GC will have updated our copies in the // frame. // // So, if ptrX19_X29 points into the MachState, we need to update // the register here. That's what this macro does. // .macro RestoreRegMS regIndex, reg // Incoming: // // x0 = address of MachState // // $regIndex: Index of the register (x19-x28). For x19, index is 19. //For x20, index is 20, and so on. // // $reg: Register name (e.g. x19, x20, etc) // // Get the address of the specified captured register from machine state add x2, x0, #(MachState__captureX19_X29 + ((\regIndex-19)*8)) // Get the content of specified preserved register pointer from machine state ldr x3, [x0, #(MachState__ptrX19_X29 + ((\regIndex-19)*8))] cmp x2, x3 bne LOCAL_LABEL(NoRestore_\reg) ldr \reg, [x2] LOCAL_LABEL(NoRestore_\reg): .endmacro // EXTERN_C int __fastcall HelperMethodFrameRestoreState( // INDEBUG_COMMA(HelperMethodFrame *pFrame) // MachState *pState // ) LEAF_ENTRY HelperMethodFrameRestoreState, _TEXT #ifdef _DEBUG mov x0, x1 #endif // If machine state is invalid, then simply exit ldr w1, [x0, #MachState__isValid] cmp w1, #0 beq LOCAL_LABEL(Done) RestoreRegMS 19, X19 RestoreRegMS 20, X20 RestoreRegMS 21, X21 RestoreRegMS 22, X22 RestoreRegMS 23, X23 RestoreRegMS 24, X24 RestoreRegMS 25, X25 RestoreRegMS 26, X26 RestoreRegMS 27, X27 RestoreRegMS 28, X28 RestoreRegMS 29, X29 LOCAL_LABEL(Done): // Its imperative that the return value of HelperMethodFrameRestoreState is zero // as it is used in the state machine to loop until it becomes zero. // Refer to HELPER_METHOD_FRAME_END macro for details. mov x0,#0 ret lr LEAF_END HelperMethodFrameRestoreState, _TEXT // ------------------------------------------------------------------ // The call in ndirect import precode points to this function. NESTED_ENTRY NDirectImportThunk, _TEXT, NoHandler PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -224 SAVE_ARGUMENT_REGISTERS sp, 16 SAVE_FLOAT_ARGUMENT_REGISTERS sp, 96 mov x0, x12 bl NDirectImportWorker mov x12, x0 // pop the stack and restore original register state RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 96 RESTORE_ARGUMENT_REGISTERS sp, 16 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 224 // If we got back from NDirectImportWorker, the MD has been successfully // linked. Proceed to execute the original DLL call. EPILOG_BRANCH_REG x12 NESTED_END NDirectImportThunk, _TEXT // ------------------------------------------------------------------ // The call in fixup precode initally points to this function. // The pupose of this function is to load the MethodDesc and forward the call to prestub. NESTED_ENTRY PrecodeFixupThunk, _TEXT, NoHandler // x12 = FixupPrecode * // On Exit // x12 = MethodDesc* // x13, x14 Trashed // Inline computation done by FixupPrecode::GetMethodDesc() ldrb w13, [x12, #Offset_PrecodeChunkIndex] //m_PrecodeChunkIndex ldrb w14, [x12, #Offset_MethodDescChunkIndex] // m_MethodDescChunkIndex add x12, x12, w13, uxtw #FixupPrecode_ALIGNMENT_SHIFT_1 add x13, x12, w13, uxtw #FixupPrecode_ALIGNMENT_SHIFT_2 ldr x13, [x13, #SIZEOF__FixupPrecode] add x12, x13, w14, uxtw #MethodDesc_ALIGNMENT_SHIFT b ThePreStub NESTED_END PrecodeFixupThunk, _TEXT // ------------------------------------------------------------------ NESTED_ENTRY ThePreStub, _TEXT, NoHandler PROLOG_WITH_TRANSITION_BLOCK add x0, sp, #__PWTB_TransitionBlock // pTransitionBlock mov x1, METHODDESC_REGISTER // pMethodDesc bl PreStubWorker mov x9, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL EPILOG_BRANCH_REG x9 NESTED_END ThePreStub, _TEXT // ------------------------------------------------------------------ // ThePreStubPatch() LEAF_ENTRY ThePreStubPatch, _TEXT nop .globl C_FUNC(ThePreStubPatchLabel) C_FUNC(ThePreStubPatchLabel): ret lr LEAF_END ThePreStubPatch, _TEXT //----------------------------------------------------------------------------- // The following Macros help in WRITE_BARRIER Implemetations // WRITE_BARRIER_ENTRY // // Declare the start of a write barrier function. Use similarly to NESTED_ENTRY. This is the only legal way // to declare a write barrier function. // .macro WRITE_BARRIER_ENTRY name LEAF_ENTRY \name, _TEXT .endmacro // WRITE_BARRIER_END // // The partner to WRITE_BARRIER_ENTRY, used like NESTED_END. // .macro WRITE_BARRIER_END name LEAF_END_MARKED \name, _TEXT .endmacro // ------------------------------------------------------------------ // Start of the writeable code region LEAF_ENTRY JIT_PatchedCodeStart, _TEXT ret lr LEAF_END JIT_PatchedCodeStart, _TEXT // void JIT_UpdateWriteBarrierState(bool skipEphemeralCheck) // // Update shadow copies of the various state info required for barrier // // State info is contained in a literal pool at the end of the function // Placed in text section so that it is close enough to use ldr literal and still // be relocatable. Eliminates need for PREPARE_EXTERNAL_VAR in hot code. // // Align and group state info together so it fits in a single cache line // and each entry can be written atomically // WRITE_BARRIER_ENTRY JIT_UpdateWriteBarrierState PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -16 // x0-x7 will contain intended new state // x8 will preserve skipEphemeralCheck // x12 will be used for pointers mov x8, x0 PREPARE_EXTERNAL_VAR g_card_table, x12 ldr x0, [x12] #ifdef FEATURE_MANUALLY_MANAGED_CARD_BUNDLES PREPARE_EXTERNAL_VAR g_card_bundle_table, x12 ldr x1, [x12] #endif #ifdef WRITE_BARRIER_CHECK PREPARE_EXTERNAL_VAR g_GCShadow, x12 ldr x2, [x12] #endif #ifdef FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP PREPARE_EXTERNAL_VAR g_sw_ww_table, x12 ldr x3, [x12] #endif PREPARE_EXTERNAL_VAR g_ephemeral_low, x12 ldr x4, [x12] PREPARE_EXTERNAL_VAR g_ephemeral_high, x12 ldr x5, [x12] cbz x8, LOCAL_LABEL(EphemeralCheckEnabled) movz x4, #0 movn x5, #0 LOCAL_LABEL(EphemeralCheckEnabled): PREPARE_EXTERNAL_VAR g_lowest_address, x12 ldr x6, [x12] PREPARE_EXTERNAL_VAR g_highest_address, x12 ldr x7, [x12] // Update wbs state adr x12, LOCAL_LABEL(wbs_begin) stp x0, x1, [x12], 16 stp x2, x3, [x12], 16 stp x4, x5, [x12], 16 stp x6, x7, [x12], 16 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 16 EPILOG_RETURN // Begin patchable literal pool .balign 64 // Align to power of two at least as big as patchable literal pool so that it fits optimally in cache line LOCAL_LABEL(wbs_begin): LOCAL_LABEL(wbs_card_table): .quad 0 LOCAL_LABEL(wbs_card_bundle_table): .quad 0 LOCAL_LABEL(wbs_GCShadow): .quad 0 LOCAL_LABEL(wbs_sw_ww_table): .quad 0 LOCAL_LABEL(wbs_ephemeral_low): .quad 0 LOCAL_LABEL(wbs_ephemeral_high): .quad 0 LOCAL_LABEL(wbs_lowest_address): .quad 0 LOCAL_LABEL(wbs_highest_address): .quad 0 WRITE_BARRIER_END JIT_UpdateWriteBarrierState // ------------------------------------------------------------------ // End of the writeable code region LEAF_ENTRY JIT_PatchedCodeLast, _TEXT ret lr LEAF_END JIT_PatchedCodeLast, _TEXT // void JIT_ByRefWriteBarrier // On entry: // x13 : the source address (points to object reference to write) // x14 : the destination address (object reference written here) // // On exit: // x12 : trashed // x13 : incremented by 8 // x14 : incremented by 8 // x15 : trashed // x17 : trashed (ip1) if FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP // WRITE_BARRIER_ENTRY JIT_ByRefWriteBarrier ldr x15, [x13], 8 b C_FUNC(JIT_CheckedWriteBarrier) WRITE_BARRIER_END JIT_ByRefWriteBarrier //----------------------------------------------------------------------------- // Simple WriteBarriers // void JIT_CheckedWriteBarrier(Object** dst, Object* src) // On entry: // x14 : the destination address (LHS of the assignment) // x15 : the object reference (RHS of the assignment) // // On exit: // x12 : trashed // x14 : trashed (incremented by 8 to implement JIT_ByRefWriteBarrier contract) // x15 : trashed // x17 : trashed (ip1) if FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP // WRITE_BARRIER_ENTRY JIT_CheckedWriteBarrier ldr x12, LOCAL_LABEL(wbs_lowest_address) cmp x14, x12 ldr x12, LOCAL_LABEL(wbs_highest_address) // Compare against the upper bound if the previous comparison indicated // that the destination address is greater than or equal to the lower // bound. Otherwise, set the C flag (specified by the 0x2) so that the // branch below is not taken. ccmp x14, x12, #0x2, hs blo C_FUNC(JIT_WriteBarrier) LOCAL_LABEL(NotInHeap): str x15, [x14], 8 ret lr WRITE_BARRIER_END JIT_CheckedWriteBarrier // void JIT_WriteBarrier(Object** dst, Object* src) // On entry: // x14 : the destination address (LHS of the assignment) // x15 : the object reference (RHS of the assignment) // // On exit: // x12 : trashed // x14 : trashed (incremented by 8 to implement JIT_ByRefWriteBarrier contract) // x15 : trashed // x17 : trashed (ip1) if FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP // WRITE_BARRIER_ENTRY JIT_WriteBarrier stlr x15, [x14] #ifdef WRITE_BARRIER_CHECK // Update GC Shadow Heap // Do not perform the work if g_GCShadow is 0 ldr x12, LOCAL_LABEL(wbs_GCShadow) cbz x12, LOCAL_LABEL(ShadowUpdateDisabled) // need temporary register. Save before using. str x13, [sp, #-16]! // Compute address of shadow heap location: // pShadow = g_GCShadow + (x14 - g_lowest_address) ldr x13, LOCAL_LABEL(wbs_lowest_address) sub x13, x14, x13 add x12, x13, x12 // if (pShadow >= g_GCShadowEnd) goto end PREPARE_EXTERNAL_VAR g_GCShadowEnd, x13 ldr x13, [x13] cmp x12, x13 bhs LOCAL_LABEL(ShadowUpdateEnd) // *pShadow = x15 str x15, [x12] // Ensure that the write to the shadow heap occurs before the read from the GC heap so that race // conditions are caught by INVALIDGCVALUE. dmb ish // if ([x14] == x15) goto end ldr x13, [x14] cmp x13, x15 beq LOCAL_LABEL(ShadowUpdateEnd) // *pShadow = INVALIDGCVALUE (0xcccccccd) movz x13, #0xcccd movk x13, #0xcccc, LSL #16 str x13, [x12] LOCAL_LABEL(ShadowUpdateEnd): ldr x13, [sp], #16 LOCAL_LABEL(ShadowUpdateDisabled): #endif #ifdef FEATURE_USE_SOFTWARE_WRITE_WATCH_FOR_GC_HEAP // Update the write watch table if necessary ldr x12, LOCAL_LABEL(wbs_sw_ww_table) cbz x12, LOCAL_LABEL(CheckCardTable) add x12, x12, x14, lsr #0xc // SoftwareWriteWatch::AddressToTableByteIndexShift ldrb w17, [x12] cbnz x17, LOCAL_LABEL(CheckCardTable) mov w17, #0xFF strb w17, [x12] #endif LOCAL_LABEL(CheckCardTable): // Branch to Exit if the reference is not in the Gen0 heap // ldr x12, LOCAL_LABEL(wbs_ephemeral_low) cbz x12, LOCAL_LABEL(SkipEphemeralCheck) cmp x15, x12 ldr x12, LOCAL_LABEL(wbs_ephemeral_high) // Compare against the upper bound if the previous comparison indicated // that the destination address is greater than or equal to the lower // bound. Otherwise, set the C flag (specified by the 0x2) so that the // branch to exit is taken. ccmp x15, x12, #0x2, hs bhi LOCAL_LABEL(Exit) LOCAL_LABEL(SkipEphemeralCheck): // Check if we need to update the card table ldr x12, LOCAL_LABEL(wbs_card_table) add x15, x12, x14, lsr #11 ldrb w12, [x15] cmp x12, 0xFF beq LOCAL_LABEL(Exit) LOCAL_LABEL(UpdateCardTable): mov x12, 0xFF strb w12, [x15] #ifdef FEATURE_MANUALLY_MANAGED_CARD_BUNDLES // Check if we need to update the card bundle table ldr x12, LOCAL_LABEL(wbs_card_bundle_table) add x15, x12, x14, lsr #21 ldrb w12, [x15] cmp x12, 0xFF beq LOCAL_LABEL(Exit) LOCAL_LABEL(UpdateCardBundle): mov x12, 0xFF strb w12, [x15] #endif LOCAL_LABEL(Exit): add x14, x14, 8 ret lr WRITE_BARRIER_END JIT_WriteBarrier #ifdef FEATURE_PREJIT //------------------------------------------------ // VirtualMethodFixupStub // // In NGEN images, virtual slots inherited from cross-module dependencies // point to a jump thunk that calls into the following function that will // call into a VM helper. The VM helper is responsible for patching up // thunk, upon executing the precode, so that all subsequent calls go directly // to the actual method body. // // This is done lazily for performance reasons. // // On entry: // // x0 = "this" pointer // x12 = Address of thunk NESTED_ENTRY VirtualMethodFixupStub, _TEXT, NoHandler // Save arguments and return address PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -224 SAVE_ARGUMENT_REGISTERS sp, 16 SAVE_FLOAT_ARGUMENT_REGISTERS sp, 96 // Refer to ZapImportVirtualThunk::Save // for details on this. // // Move the thunk start address in x1 mov x1, x12 // Call the helper in the VM to perform the actual fixup // and tell us where to tail call. x0 already contains // the this pointer. bl C_FUNC(VirtualMethodFixupWorker) // On return, x0 contains the target to tailcall to mov x12, x0 // pop the stack and restore original register state RESTORE_ARGUMENT_REGISTERS sp, 16 RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 96 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 224 PATCH_LABEL VirtualMethodFixupPatchLabel // and tailcall to the actual method EPILOG_BRANCH_REG x12 NESTED_END VirtualMethodFixupStub, _TEXT #endif // FEATURE_PREJIT //------------------------------------------------ // ExternalMethodFixupStub // // In NGEN images, calls to cross-module external methods initially // point to a jump thunk that calls into the following function that will // call into a VM helper. The VM helper is responsible for patching up the // thunk, upon executing the precode, so that all subsequent calls go directly // to the actual method body. // // This is done lazily for performance reasons. // // On entry: // // x12 = Address of thunk NESTED_ENTRY ExternalMethodFixupStub, _TEXT, NoHandler PROLOG_WITH_TRANSITION_BLOCK add x0, sp, #__PWTB_TransitionBlock // pTransitionBlock mov x1, x12 // pThunk mov x2, #0 // sectionIndex mov x3, #0 // pModule bl C_FUNC(ExternalMethodFixupWorker) // mov the address we patched to in x12 so that we can tail call to it mov x12, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL PATCH_LABEL ExternalMethodFixupPatchLabel EPILOG_BRANCH_REG x12 NESTED_END ExternalMethodFixupStub, _TEXT // void SinglecastDelegateInvokeStub(Delegate *pThis) LEAF_ENTRY SinglecastDelegateInvokeStub, _TEXT cmp x0, #0 beq LOCAL_LABEL(LNullThis) ldr x16, [x0, #DelegateObject___methodPtr] ldr x0, [x0, #DelegateObject___target] br x16 LOCAL_LABEL(LNullThis): mov x0, #CORINFO_NullReferenceException_ASM b C_FUNC(JIT_InternalThrow) LEAF_END SinglecastDelegateInvokeStub, _TEXT #ifdef FEATURE_COMINTEROP #define ComCallPreStub_FrameSize (SIZEOF__GSCookie + SIZEOF__ComMethodFrame) #define ComCallPreStub_FirstStackAdjust (8 + SIZEOF__ArgumentRegisters + 2 * 8) // x8, reg args , fp & lr already pushed #define ComCallPreStub_StackAlloc0 (ComCallPreStub_FrameSize - ComCallPreStub_FirstStackAdjust) #define ComCallPreStub_StackAlloc1 (ComCallPreStub_StackAlloc0 + SIZEOF__FloatArgumentRegisters + 8)// 8 for ErrorReturn #define ComCallPreStub_StackAlloc (ComCallPreStub_StackAlloc1 + (ComCallPreStub_StackAlloc1 & 8)) #define ComCallPreStub_FrameOffset (ComCallPreStub_StackAlloc - (SIZEOF__ComMethodFrame - ComCallPreStub_FirstStackAdjust)) #define ComCallPreStub_ErrorReturnOffset0 SIZEOF__FloatArgumentRegisters #define ComCallPreStub_FirstStackAdjust (ComCallPreStub_ErrorReturnOffset0 + (ComCallPreStub_ErrorReturnOffset0 & 8)) // ------------------------------------------------------------------ // COM to CLR stub called the first time a particular method is invoked.// // // On entry: // x12 : ComCallMethodDesc* provided by prepad thunk // plus user arguments in registers and on the stack // // On exit: // tail calls to real method // NESTED_ENTRY ComCallPreStub, _TEXT, NoHandler // Save arguments and return address PROLOG_SAVE_REG_PAIR fp, lr, -ComCallPreStub_FirstStackAdjust! PROLOG_STACK_ALLOC ComCallPreStub_StackAlloc SAVE_ARGUMENT_REGISTERS sp, (16+ComCallPreStub_StackAlloc) SAVE_FLOAT_ARGUMENT_REGISTERS sp, 0 str x12, [sp, #(ComCallPreStub_FrameOffset + UnmanagedToManagedFrame__m_pvDatum)] add x0, sp, #(ComCallPreStub_FrameOffset) add x1, sp, #(ComCallPreStub_ErrorReturnOffset) bl ComPreStubWorker cbz x0, ComCallPreStub_ErrorExit mov x12, x0 // pop the stack and restore original register state RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 0 RESTORE_ARGUMENT_REGISTERS sp, (16+ComCallPreStub_StackAlloc) EPILOG_STACK_FREE ComCallPreStub_StackAlloc EPILOG_RESTORE_REG_PAIR fp, lr, ComCallPreStub_FirstStackAdjust! // and tailcall to the actual method EPILOG_BRANCH_REG x12 ComCallPreStub_ErrorExit ldr x0, [sp, #(ComCallPreStub_ErrorReturnOffset)] // ErrorReturn // pop the stack EPILOG_STACK_FREE ComCallPreStub_StackAlloc EPILOG_RESTORE_REG_PAIR fp, lr, ComCallPreStub_FirstStackAdjust! EPILOG_RETURN NESTED_END ComCallPreStub, _TEXT // ------------------------------------------------------------------ // COM to CLR stub which sets up a ComMethodFrame and calls COMToCLRWorker. // // On entry: // x12 : ComCallMethodDesc* provided by prepad thunk // plus user arguments in registers and on the stack // // On exit: // Result in x0/d0 as per the real method being called // NESTED_ENTRY GenericComCallStub, _TEXT, NoHandler // Save arguments and return address PROLOG_SAVE_REG_PAIR fp, lr, -GenericComCallStub_FirstStackAdjust! PROLOG_STACK_ALLOC GenericComCallStub_StackAlloc SAVE_ARGUMENT_REGISTERS sp, (16+GenericComCallStub_StackAlloc) SAVE_FLOAT_ARGUMENT_REGISTERS sp, 0 str x12, [sp, #(GenericComCallStub_FrameOffset + UnmanagedToManagedFrame__m_pvDatum)] add x1, sp, #GenericComCallStub_FrameOffset bl COMToCLRWorker // pop the stack EPILOG_STACK_FREE GenericComCallStub_StackAlloc EPILOG_RESTORE_REG_PAIR fp, lr, GenericComCallStub_FirstStackAdjust! EPILOG_RETURN NESTED_END GenericComCallStub, _TEXT // ------------------------------------------------------------------ // COM to CLR stub called from COMToCLRWorker that actually dispatches to the real managed method. // // On entry: // x0 : dwStackSlots, count of argument stack slots to copy // x1 : pFrame, ComMethodFrame pushed by GenericComCallStub above // x2 : pTarget, address of code to call // x3 : pSecretArg, hidden argument passed to target above in x12 // x4 : pDangerousThis, managed 'this' reference // // On exit: // Result in x0/d0 as per the real method being called // NESTED_ENTRY COMToCLRDispatchHelper, _TEXT,CallDescrWorkerUnwindFrameChainHandler PROLOG_SAVE_REG_PAIR fp, lr, -16! cbz x0, COMToCLRDispatchHelper_RegSetup add x9, x1, #SIZEOF__ComMethodFrame add x9, x9, x0, LSL #3 COMToCLRDispatchHelper_StackLoop ldr x8, [x9, #-8]! str x8, [sp, #-8]! sub x0, x0, #1 cbnz x0, COMToCLRDispatchHelper_StackLoop COMToCLRDispatchHelper_RegSetup RESTORE_FLOAT_ARGUMENT_REGISTERS x1, -1 * GenericComCallStub_FrameOffset mov lr, x2 mov x12, x3 mov x0, x4 ldp x2, x3, [x1, #(SIZEOF__ComMethodFrame - SIZEOF__ArgumentRegisters + 16)] ldp x4, x5, [x1, #(SIZEOF__ComMethodFrame - SIZEOF__ArgumentRegisters + 32)] ldp x6, x7, [x1, #(SIZEOF__ComMethodFrame - SIZEOF__ArgumentRegisters + 48)] ldr x8, [x1, #(SIZEOF__ComMethodFrame - SIZEOF__ArgumentRegisters - 8)] ldr x1, [x1, #(SIZEOF__ComMethodFrame - SIZEOF__ArgumentRegisters + 8)] blr lr EPILOG_STACK_RESTORE EPILOG_RESTORE_REG_PAIR fp, lr, 16! EPILOG_RETURN NESTED_END COMToCLRDispatchHelper, _TEXT #endif // FEATURE_COMINTEROP // // x12 = UMEntryThunk* // NESTED_ENTRY TheUMEntryPrestub, _TEXT, UnhandledExceptionHandlerUnix // Save arguments and return address PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -224 SAVE_ARGUMENT_REGISTERS sp, 16 SAVE_FLOAT_ARGUMENT_REGISTERS sp, 96 mov x0, x12 bl C_FUNC(TheUMEntryPrestubWorker) // save real target address in x12. mov x12, x0 // pop the stack and restore original register state RESTORE_ARGUMENT_REGISTERS sp, 16 RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 96 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 224 // and tailcall to the actual method EPILOG_BRANCH_REG x12 NESTED_END TheUMEntryPrestub, _TEXT // // x12 = UMEntryThunk* // NESTED_ENTRY UMThunkStub, _TEXT, UnhandledExceptionHandlerUnix // Save arguments and return address PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -112 // 72 for regArgs, 8 for x19 & 8 for x12 // save callee saved reg x19. x19 is used in the method to store thread* PROLOG_SAVE_REG x19, 96 SAVE_ARGUMENT_REGISTERS sp, 16 #define UMThunkStub_HiddenArg 88 // offset of saved UMEntryThunk * #define UMThunkStub_StackArgs 112 // offset of original stack args (total size of UMThunkStub frame) // save UMEntryThunk* str x12, [sp, #UMThunkStub_HiddenArg] // assuming GetThread does not clobber FP Args bl C_FUNC(GetThread) cbz x0, LOCAL_LABEL(UMThunkStub_DoThreadSetup) LOCAL_LABEL(UMThunkStub_HaveThread): mov x19, x0 // x19 = Thread * mov x9, 1 // m_fPreemptiveGCDisabled is 4 byte field so using 32-bit variant str w9, [x19, #Thread__m_fPreemptiveGCDisabled] PREPARE_EXTERNAL_VAR g_TrapReturningThreads, x2 ldr x3, [x2] // assuming x0 contains Thread* before jumping to UMThunkStub_DoTrapReturningThreads cbnz x3, LOCAL_LABEL(UMThunkStub_DoTrapReturningThreads) LOCAL_LABEL(UMThunkStub_InCooperativeMode): ldr x12, [fp, #UMThunkStub_HiddenArg] // x12 = UMEntryThunk* ldr x3, [x12, #UMEntryThunk__m_pUMThunkMarshInfo] // x3 = m_pUMThunkMarshInfo // m_cbActualArgSize is UINT32 and hence occupies 4 bytes ldr w2, [x3, #UMThunkMarshInfo__m_cbActualArgSize] // w2 = Stack arg bytes cbz w2, LOCAL_LABEL(UMThunkStub_RegArgumentsSetup) // extend to 64-bits uxtw x2, w2 // Source pointer add x0, fp, #UMThunkStub_StackArgs // move source pointer to end of Stack Args add x0, x0, x2 // Count of stack slot pairs to copy (divide by 16) lsr x1, x2, #4 // Is there an extra stack slot (can happen when stack arg bytes not multiple of 16) and x2, x2, #8 // If yes then start source pointer from 16 byte aligned stack slot add x0, x0, x2 // increment stack slot pair count by 1 if x2 is not zero add x1, x1, x2, LSR #3 LOCAL_LABEL(UMThunkStub_StackLoop): ldp x4, x5, [x0, #-16]! // pre-Index stp x4, x5, [sp, #-16]! // pre-Index subs x1, x1, #1 bne LOCAL_LABEL(UMThunkStub_StackLoop) LOCAL_LABEL(UMThunkStub_RegArgumentsSetup): ldr x16, [x3, #UMThunkMarshInfo__m_pILStub] RESTORE_ARGUMENT_REGISTERS fp, 16 blr x16 LOCAL_LABEL(UMThunkStub_PostCall): mov x4, 0 // m_fPreemptiveGCDisabled is 4 byte field so using 32-bit variant str w4, [x19, #Thread__m_fPreemptiveGCDisabled] EPILOG_STACK_RESTORE EPILOG_RESTORE_REG x19, 96 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 112 EPILOG_RETURN LOCAL_LABEL(UMThunkStub_DoThreadSetup): sub sp, sp, #SIZEOF__FloatArgumentRegisters SAVE_FLOAT_ARGUMENT_REGISTERS sp, 0 bl C_FUNC(CreateThreadBlockThrow) RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 0 add sp, sp, #SIZEOF__FloatArgumentRegisters b LOCAL_LABEL(UMThunkStub_HaveThread) LOCAL_LABEL(UMThunkStub_DoTrapReturningThreads): sub sp, sp, #SIZEOF__FloatArgumentRegisters SAVE_FLOAT_ARGUMENT_REGISTERS sp, 0 // x0 already contains Thread* pThread // UMEntryThunk* pUMEntry ldr x1, [fp, #UMThunkStub_HiddenArg] bl C_FUNC(UMThunkStubRareDisableWorker) RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 0 add sp, sp, #SIZEOF__FloatArgumentRegisters b LOCAL_LABEL(UMThunkStub_InCooperativeMode) NESTED_END UMThunkStub, _TEXT #ifdef FEATURE_HIJACK // ------------------------------------------------------------------ // Hijack function for functions which return a scalar type or a struct (value type) NESTED_ENTRY OnHijackTripThread, _TEXT, NoHandler PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -176 // Spill callee saved registers PROLOG_SAVE_REG_PAIR x19, x20, 16 PROLOG_SAVE_REG_PAIR x21, x22, 32 PROLOG_SAVE_REG_PAIR x23, x24, 48 PROLOG_SAVE_REG_PAIR x25, x26, 64 PROLOG_SAVE_REG_PAIR x27, x28, 80 // save any integral return value(s) stp x0, x1, [sp, #96] // save any FP/HFA return value(s) stp q0, q1, [sp, #112] stp q2, q3, [sp, #144] mov x0, sp bl OnHijackWorker // restore any integral return value(s) ldp x0, x1, [sp, #96] // restore any FP/HFA return value(s) ldp q0, q1, [sp, #112] ldp q2, q3, [sp, #144] EPILOG_RESTORE_REG_PAIR x19, x20, 16 EPILOG_RESTORE_REG_PAIR x21, x22, 32 EPILOG_RESTORE_REG_PAIR x23, x24, 48 EPILOG_RESTORE_REG_PAIR x25, x26, 64 EPILOG_RESTORE_REG_PAIR x27, x28, 80 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 176 EPILOG_RETURN NESTED_END OnHijackTripThread, _TEXT #endif // FEATURE_HIJACK // ------------------------------------------------------------------ // Redirection Stub for GC in fully interruptible method //GenerateRedirectedHandledJITCaseStub GCThreadControl // ------------------------------------------------------------------ //GenerateRedirectedHandledJITCaseStub DbgThreadControl // ------------------------------------------------------------------ //GenerateRedirectedHandledJITCaseStub UserSuspend #ifdef _DEBUG // ------------------------------------------------------------------ // Redirection Stub for GC Stress GenerateRedirectedHandledJITCaseStub GCStress #endif // ------------------------------------------------------------------ // This helper enables us to call into a funclet after restoring Fp register NESTED_ENTRY CallEHFunclet, _TEXT, NoHandler // On entry: // // X0 = throwable // X1 = PC to invoke // X2 = address of X19 register in CONTEXT record// used to restore the non-volatile registers of CrawlFrame // X3 = address of the location where the SP of funclet's caller (i.e. this helper) should be saved. // // Using below prolog instead of PROLOG_SAVE_REG_PAIR_INDEXED fp,lr, -96 // is intentional. Above statement would also emit instruction to save // sp in fp. If sp is saved in fp in prolog then it is not expected that fp can change in the body // of method. However, this method needs to be able to change fp before calling funclet. // This is required to access locals in funclet. PROLOG_SAVE_REG_PAIR_INDEXED x29, lr, -96 // Spill callee saved registers PROLOG_SAVE_REG_PAIR x19, x20, 16 PROLOG_SAVE_REG_PAIR x21, x22, 32 PROLOG_SAVE_REG_PAIR x23, x24, 48 PROLOG_SAVE_REG_PAIR x25, x26, 64 PROLOG_SAVE_REG_PAIR x27, x28, 80 // Save the SP of this function mov x4, sp str x4, [x3] ldp x19, x20, [x2, #0] ldp x21, x22, [x2, #16] ldp x23, x24, [x2, #32] ldp x25, x26, [x2, #48] ldp x27, x28, [x2, #64] ldr fp, [x2, #80] // offset of fp in CONTEXT relative to X19 // Invoke the funclet blr x1 nop EPILOG_RESTORE_REG_PAIR x19, x20, 16 EPILOG_RESTORE_REG_PAIR x21, x22, 32 EPILOG_RESTORE_REG_PAIR x23, x24, 48 EPILOG_RESTORE_REG_PAIR x25, x26, 64 EPILOG_RESTORE_REG_PAIR x27, x28, 80 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 96 EPILOG_RETURN NESTED_END CallEHFunclet, _TEXT // This helper enables us to call into a filter funclet by passing it the CallerSP to lookup the // frame pointer for accessing the locals in the parent method. NESTED_ENTRY CallEHFilterFunclet, _TEXT, NoHandler PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -16 // On entry: // // X0 = throwable // X1 = SP of the caller of the method/funclet containing the filter // X2 = PC to invoke // X3 = address of the location where the SP of funclet's caller (i.e. this helper) should be saved. // // Save the SP of this function str fp, [x3] // Invoke the filter funclet blr x2 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 16 EPILOG_RETURN NESTED_END CallEHFilterFunclet, _TEXT #define FaultingExceptionFrame_StackAlloc (SIZEOF__GSCookie + SIZEOF__FaultingExceptionFrame) #define FaultingExceptionFrame_FrameOffset SIZEOF__GSCookie .macro GenerateRedirectedStubWithFrame stub, target // // This is the primary function to which execution will be redirected to. // NESTED_ENTRY \stub, _TEXT, NoHandler // // IN: lr: original IP before redirect // PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -16 PROLOG_STACK_ALLOC FaultingExceptionFrame_StackAlloc // At this point, the stack maybe misaligned if the thread abort was asynchronously // triggered in the prolog or epilog of the managed method. For such a case, we must // align the stack before calling into the VM. // // Runtime check for 16-byte alignment. mov x0, sp and x0, x0, #15 sub sp, sp, x0 // Save pointer to FEF for GetFrameFromRedirectedStubStackFrame add x19, sp, #FaultingExceptionFrame_FrameOffset // Prepare to initialize to NULL mov x1,#0 str x1, [x19]// Initialize vtbl (it is not strictly necessary) str x1, [x19, #FaultingExceptionFrame__m_fFilterExecuted]// Initialize BOOL for personality routine mov x0, x19 // move the ptr to FEF in X0 bl C_FUNC(\target) // Target should not return. EMIT_BREAKPOINT NESTED_END \stub, _TEXT .endmacro // ------------------------------------------------------------------ // ResolveWorkerChainLookupAsmStub // // This method will perform a quick chained lookup of the entry if the // initial cache lookup fails. // // On Entry: // x9 contains the pointer to the current ResolveCacheElem // x11 contains the address of the indirection (and the flags in the low two bits) // x12 contains our contract the DispatchToken // Must be preserved: // x0 contains the instance object ref that we are making an interface call on // x9 Must point to a ResolveCacheElem [For Sanity] // [x1-x7] contains any additional register arguments for the interface method // // Loaded from x0 // x13 contains our type the MethodTable (from object ref in x0) // // On Exit: // x0, [x1-x7] arguments for the interface implementation target // // On Exit (to ResolveWorkerAsmStub): // x11 contains the address of the indirection and the flags in the low two bits. // x12 contains our contract (DispatchToken) // x16,x17 will be trashed // #define BACKPATCH_FLAG 1 #define PROMOTE_CHAIN_FLAG 2 NESTED_ENTRY ResolveWorkerChainLookupAsmStub, _TEXT, NoHandler tst x11, #BACKPATCH_FLAG // First we check if x11 has the BACKPATCH_FLAG set bne LOCAL_LABEL(Fail) // If the BACKPATCH_FLAGS is set we will go directly to the ResolveWorkerAsmStub ldr x13, [x0] // retrieve the MethodTable from the object ref in x0 LOCAL_LABEL(MainLoop): ldr x9, [x9, #ResolveCacheElem__pNext] // x9 <= the next entry in the chain cmp x9, #0 beq LOCAL_LABEL(Fail) ldp x16, x17, [x9] cmp x16, x13 // compare our MT with the one in the ResolveCacheElem bne LOCAL_LABEL(MainLoop) cmp x17, x12 // compare our DispatchToken with one in the ResolveCacheElem bne LOCAL_LABEL(MainLoop) LOCAL_LABEL(Success): PREPARE_EXTERNAL_VAR g_dispatch_cache_chain_success_counter, x13 ldr x16, [x13] subs x16, x16, #1 str x16, [x13] blt LOCAL_LABEL(Promote) ldr x16, [x9, #ResolveCacheElem__target] // get the ImplTarget br x16 // branch to interface implemenation target LOCAL_LABEL(Promote): // Move this entry to head postion of the chain mov x16, #256 str x16, [x13] // be quick to reset the counter so we don't get a bunch of contending threads orr x11, x11, #PROMOTE_CHAIN_FLAG // set PROMOTE_CHAIN_FLAG mov x12, x9 // We pass the ResolveCacheElem to ResolveWorkerAsmStub instead of the DispatchToken LOCAL_LABEL(Fail): b ResolveWorkerAsmStub // call the ResolveWorkerAsmStub method to transition into the VM NESTED_END ResolveWorkerChainLookupAsmStub, _TEXT // ------------------------------------------------------------------ // void ResolveWorkerAsmStub(args in regs x0-x7 & stack and possibly retbuf arg in x8, x11:IndirectionCellAndFlags, x12:DispatchToken) // // The stub dispatch thunk which transfers control to VSD_ResolveWorker. NESTED_ENTRY ResolveWorkerAsmStub, _TEXT, NoHandler PROLOG_WITH_TRANSITION_BLOCK add x0, sp, #__PWTB_TransitionBlock // pTransitionBlock and x1, x11, #-4 // Indirection cell mov x2, x12 // DispatchToken and x3, x11, #3 // flag bl VSD_ResolveWorker mov x9, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL EPILOG_BRANCH_REG x9 NESTED_END ResolveWorkerAsmStub, _TEXT #ifdef FEATURE_READYTORUN NESTED_ENTRY DelayLoad_MethodCall_FakeProlog, _TEXT, NoHandler DelayLoad_MethodCall: .global DelayLoad_MethodCall PROLOG_WITH_TRANSITION_BLOCK add x0, sp, #__PWTB_TransitionBlock // pTransitionBlock mov x1, x11 // Indirection cell mov x2, x9 // sectionIndex mov x3, x10 // Module* bl ExternalMethodFixupWorker mov x12, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL // Share patch label b ExternalMethodFixupPatchLabel NESTED_END DelayLoad_MethodCall_FakeProlog, _TEXT .macro DynamicHelper frameFlags, suffix NESTED_ENTRY DelayLoad_Helper\suffix\()_FakeProlog, _TEXT, NoHandler DelayLoad_Helper\suffix: .global DelayLoad_Helper\suffix PROLOG_WITH_TRANSITION_BLOCK add x0, sp, #__PWTB_TransitionBlock // pTransitionBlock mov x1, x11 // Indirection cell mov x2, x9 // sectionIndex mov x3, x10 // Module* mov x4, \frameFlags bl DynamicHelperWorker cbnz x0, LOCAL_LABEL(FakeProlog\suffix\()_0) ldr x0, [sp, #__PWTB_ArgumentRegister_FirstArg] EPILOG_WITH_TRANSITION_BLOCK_RETURN LOCAL_LABEL(FakeProlog\suffix\()_0): mov x12, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL EPILOG_BRANCH_REG x12 NESTED_END DelayLoad_Helper\suffix\()_FakeProlog, _TEXT .endm DynamicHelper DynamicHelperFrameFlags_Default DynamicHelper DynamicHelperFrameFlags_ObjectArg, _Obj DynamicHelper DynamicHelperFrameFlags_ObjectArg | DynamicHelperFrameFlags_ObjectArg2, _ObjObj #endif #ifdef FEATURE_PREJIT // ------------------------------------------------------------------ // void StubDispatchFixupStub(args in regs x0-x7 & stack and possibly retbuff arg in x8, x11:IndirectionCellAndFlags) // // The stub dispatch thunk which transfers control to StubDispatchFixupWorker. NESTED_ENTRY StubDispatchFixupStub, _TEXT, NoHandler PROLOG_WITH_TRANSITION_BLOCK add x0, sp, #__PWTB_TransitionBlock // pTransitionBlock and x1, x11, #-4 // Indirection cell mov x2, #0 // sectionIndex mov x3, #0 // pModule bl C_FUNC(StubDispatchFixupWorker) mov x12, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL PATCH_LABEL StubDispatchFixupPatchLabel EPILOG_BRANCH_REG x12 NESTED_END StubDispatchFixupStub, _TEXT #endif #ifdef FEATURE_COMINTEROP // Function used by COM interop to get floating point return value (since it's not in the same // register(s) as non-floating point values). // // On entry// // x0 : size of the FP result (4 or 8 bytes) // x1 : pointer to 64-bit buffer to receive result // // On exit: // buffer pointed to by x1 on entry contains the float or double argument as appropriate // LEAF_ENTRY getFPReturn, _TEXT str d0, [x1] LEAF_END getFPReturn, _TEXT // ------------------------------------------------------------------ // Function used by COM interop to set floating point return value (since it's not in the same // register(s) as non-floating point values). // // On entry: // x0 : size of the FP result (4 or 8 bytes) // x1 : 32-bit or 64-bit FP result // // On exit: // s0 : float result if x0 == 4 // d0 : double result if x0 == 8 // LEAF_ENTRY setFPReturn, _TEXT fmov d0, x1 LEAF_END setFPReturn, _TEXT #endif // // JIT Static access helpers when coreclr host specifies single appdomain flag // // ------------------------------------------------------------------ // void* JIT_GetSharedNonGCStaticBase(SIZE_T moduleDomainID, DWORD dwClassDomainID) LEAF_ENTRY JIT_GetSharedNonGCStaticBase_SingleAppDomain, _TEXT // If class is not initialized, bail to C++ helper add x2, x0, #DomainLocalModule__m_pDataBlob ldrb w2, [x2, w1, UXTW] tst w2, #1 beq LOCAL_LABEL(JIT_GetSharedNonGCStaticBase_SingleAppDomain_CallHelper) ret lr LOCAL_LABEL(JIT_GetSharedNonGCStaticBase_SingleAppDomain_CallHelper): // Tail call JIT_GetSharedNonGCStaticBase_Helper b C_FUNC(JIT_GetSharedNonGCStaticBase_Helper) LEAF_END JIT_GetSharedNonGCStaticBase_SingleAppDomain, _TEXT // ------------------------------------------------------------------ // void* JIT_GetSharedNonGCStaticBaseNoCtor(SIZE_T moduleDomainID, DWORD dwClassDomainID) LEAF_ENTRY JIT_GetSharedNonGCStaticBaseNoCtor_SingleAppDomain, _TEXT ret lr LEAF_END JIT_GetSharedNonGCStaticBaseNoCtor_SingleAppDomain, _TEXT // ------------------------------------------------------------------ // void* JIT_GetSharedGCStaticBase(SIZE_T moduleDomainID, DWORD dwClassDomainID) LEAF_ENTRY JIT_GetSharedGCStaticBase_SingleAppDomain, _TEXT // If class is not initialized, bail to C++ helper add x2, x0, #DomainLocalModule__m_pDataBlob ldrb w2, [x2, w1, UXTW] tst w2, #1 beq LOCAL_LABEL(JIT_GetSharedGCStaticBase_SingleAppDomain_CallHelper) ldr x0, [x0, #DomainLocalModule__m_pGCStatics] ret lr LOCAL_LABEL(JIT_GetSharedGCStaticBase_SingleAppDomain_CallHelper): // Tail call Jit_GetSharedGCStaticBase_Helper b C_FUNC(JIT_GetSharedGCStaticBase_Helper) LEAF_END JIT_GetSharedGCStaticBase_SingleAppDomain, _TEXT // ------------------------------------------------------------------ // void* JIT_GetSharedGCStaticBaseNoCtor(SIZE_T moduleDomainID, DWORD dwClassDomainID) LEAF_ENTRY JIT_GetSharedGCStaticBaseNoCtor_SingleAppDomain, _TEXT ldr x0, [x0, #DomainLocalModule__m_pGCStatics] ret lr LEAF_END JIT_GetSharedGCStaticBaseNoCtor_SingleAppDomain, _TEXT // ------------------------------------------------------------------ // __declspec(naked) void F_CALL_CONV JIT_Stelem_Ref(PtrArray* array, unsigned idx, Object* val) LEAF_ENTRY JIT_Stelem_Ref, _TEXT // We retain arguments as they were passed and use x0 == array x1 == idx x2 == val // check for null array cbz x0, LOCAL_LABEL(ThrowNullReferenceException) // idx bounds check ldr x3,[x0,#ArrayBase__m_NumComponents] cmp x3, x1 bls LOCAL_LABEL(ThrowIndexOutOfRangeException) // fast path to null assignment (doesn't need any write-barriers) cbz x2, LOCAL_LABEL(AssigningNull) // Verify the array-type and val-type matches before writing ldr x12, [x0] // x12 = array MT ldr x3, [x2] // x3 = val->GetMethodTable() ldr x12, [x12, #MethodTable__m_ElementType] // array->GetArrayElementTypeHandle() cmp x3, x12 beq C_FUNC(JIT_Stelem_DoWrite) // Types didnt match but allow writing into an array of objects PREPARE_EXTERNAL_VAR g_pObjectClass, x3 ldr x3, [x3] // x3 = *g_pObjectClass cmp x3, x12 // array type matches with Object* beq C_FUNC(JIT_Stelem_DoWrite) // array type and val type do not exactly match. Raise frame and do detailed match b C_FUNC(JIT_Stelem_Ref_NotExactMatch) LOCAL_LABEL(AssigningNull): // Assigning null doesn't need write barrier add x0, x0, x1, LSL #3 // x0 = x0 + (x1 x 8) = array->m_array[idx] str x2, [x0, #PtrArray__m_Array] // array->m_array[idx] = val ret LOCAL_LABEL(ThrowNullReferenceException): // Tail call JIT_InternalThrow(NullReferenceException) ldr x0, =CORINFO_NullReferenceException_ASM b C_FUNC(JIT_InternalThrow) LOCAL_LABEL(ThrowIndexOutOfRangeException): // Tail call JIT_InternalThrow(NullReferenceException) ldr x0, =CORINFO_IndexOutOfRangeException_ASM b C_FUNC(JIT_InternalThrow) LEAF_END JIT_Stelem_Ref, _TEXT // ------------------------------------------------------------------ // __declspec(naked) void F_CALL_CONV JIT_Stelem_Ref_NotExactMatch(PtrArray* array, // unsigned idx, Object* val) // x12 = array->GetArrayElementTypeHandle() // NESTED_ENTRY JIT_Stelem_Ref_NotExactMatch, _TEXT, NoHandler PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -48 // Spill callee saved registers PROLOG_SAVE_REG_PAIR x0, x1, 16 PROLOG_SAVE_REG x2, 32 // allow in case val can be casted to array element type // call ObjIsInstanceOfNoGC(val, array->GetArrayElementTypeHandle()) mov x1, x12 // array->GetArrayElementTypeHandle() mov x0, x2 bl C_FUNC(ObjIsInstanceOfNoGC) cmp x0, TypeHandle_CanCast beq LOCAL_LABEL(DoWrite) // ObjIsInstance returned TypeHandle::CanCast // check via raising frame LOCAL_LABEL(NeedFrame): add x1, sp, #16 // x1 = &array add x0, sp, #32 // x0 = &val bl C_FUNC(ArrayStoreCheck) // ArrayStoreCheck(&val, &array) LOCAL_LABEL(DoWrite): EPILOG_RESTORE_REG_PAIR x0, x1, 16 EPILOG_RESTORE_REG x2, 32 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, 48 b C_FUNC(JIT_Stelem_DoWrite) NESTED_END JIT_Stelem_Ref_NotExactMatch, _TEXT // ------------------------------------------------------------------ // __declspec(naked) void F_CALL_CONV JIT_Stelem_DoWrite(PtrArray* array, unsigned idx, Object* val) LEAF_ENTRY JIT_Stelem_DoWrite, _TEXT // Setup args for JIT_WriteBarrier. x14 = &array->m_array[idx] x15 = val add x14, x0, #PtrArray__m_Array // x14 = &array->m_array add x14, x14, x1, LSL #3 mov x15, x2 // x15 = val // Branch to the write barrier (which is already correctly overwritten with // single or multi-proc code based on the current CPU b C_FUNC(JIT_WriteBarrier) LEAF_END JIT_Stelem_DoWrite, _TEXT #ifdef PROFILING_SUPPORTED // ------------------------------------------------------------------ LEAF_ENTRY JIT_ProfilerEnterLeaveTailcallStub, _TEXT ret lr LEAF_END JIT_ProfilerEnterLeaveTailcallStub, _TEXT // ------------------------------------------------------------------ #define PROFILE_ENTER 1 #define PROFILE_LEAVE 2 #define PROFILE_TAILCALL 4 #define SIZEOF__PROFILE_PLATFORM_SPECIFIC_DATA 256 // ------------------------------------------------------------------ .macro GenerateProfileHelper helper, flags NESTED_ENTRY \helper\()Naked, _TEXT, NoHandler // On entry: // x10 = functionIDOrClientID // x11 = profiledSp // x12 = throwable // // On exit: // Values of x0-x8, q0-q7, fp are preserved. // Values of other volatile registers are not preserved. PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, -SIZEOF__PROFILE_PLATFORM_SPECIFIC_DATA // Allocate space and save Fp, Pc. SAVE_ARGUMENT_REGISTERS sp, 16 // Save x8 and argument registers (x0-x7). str xzr, [sp, 88] // Clear functionId. SAVE_FLOAT_ARGUMENT_REGISTERS sp, 96 // Save floating-point/SIMD registers (q0-q7). add x12, fp, SIZEOF__PROFILE_PLATFORM_SPECIFIC_DATA // Compute probeSp - initial value of Sp on entry to the helper. stp x12, x11, [sp, 224] // Save probeSp, profiledSp. str xzr, [sp, 240] // Clear hiddenArg. mov w12, \flags stp w12, wzr, [sp, 248] // Save flags and clear unused field. mov x0, x10 mov x1, sp bl \helper RESTORE_ARGUMENT_REGISTERS sp, 16 // Restore x8 and argument registers. RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 96 // Restore floating-point/SIMD registers. EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, SIZEOF__PROFILE_PLATFORM_SPECIFIC_DATA EPILOG_RETURN NESTED_END \helper\()Naked, _TEXT .endmacro GenerateProfileHelper ProfileEnter, PROFILE_ENTER GenerateProfileHelper ProfileLeave, PROFILE_LEAVE GenerateProfileHelper ProfileTailcall, PROFILE_TAILCALL #endif