// 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 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, #-144 SAVE_ARGUMENT_REGISTERS sp, 16 SAVE_FLOAT_ARGUMENT_REGISTERS sp, 80 mov x0, x12 bl NDirectImportWorker mov x12, x0 // pop the stack and restore original register state RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 80 RESTORE_ARGUMENT_REGISTERS sp, 16 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, #144 // 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 // ------------------------------------------------------------------ // ARM64TODO: Implement PrecodeFixupThunk when PreCode is Enabled NESTED_ENTRY PrecodeFixupThunk, _TEXT, NoHandler 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 // ------------------------------------------------------------------ // void ResolveWorkerAsmStub(args in regs x0-x7 & stack, 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 C_FUNC(VSD_ResolveWorker) mov x9, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL EPILOG_BRANCH_REG x9 NESTED_END ResolveWorkerAsmStub, _TEXT NESTED_ENTRY ResolveWorkerChainLookupAsmStub, _TEXT, NoHandler // ARMSTUB TODO: implement chained lookup b C_FUNC(ResolveWorkerAsmStub) NESTED_END ResolveWorkerChainLookupAsmStub, _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 // 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 // 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 : incremented by 8 // x15 : trashed // WRITE_BARRIER_ENTRY JIT_CheckedWriteBarrier PREPARE_EXTERNAL_VAR g_lowest_address, x12 ldr x12, [x12] cmp x14, x12 blt LOCAL_LABEL(NotInHeap) PREPARE_EXTERNAL_VAR g_highest_address, x12 ldr x12, [x12] cmp x14, x12 blt 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 : incremented by 8 // x15 : trashed // WRITE_BARRIER_ENTRY JIT_WriteBarrier dmb ST str x15, [x14] // Branch to Exit if the reference is not in the Gen0 heap // PREPARE_EXTERNAL_VAR g_ephemeral_low, x12 ldr x12, [x12] cmp x15, x12 blt LOCAL_LABEL(Exit) PREPARE_EXTERNAL_VAR g_ephemeral_high, x12 ldr x12, [x12] cmp x15, x12 bgt LOCAL_LABEL(Exit) // Check if we need to update the card table PREPARE_EXTERNAL_VAR g_card_table, x12 ldr x12, [x12] 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] LOCAL_LABEL(Exit): add x14, x14, 8 ret lr WRITE_BARRIER_END JIT_WriteBarrier // ------------------------------------------------------------------ // Start of the writeable code region LEAF_ENTRY JIT_PatchedCodeStart, _TEXT ret lr LEAF_END JIT_PatchedCodeStart, _TEXT // ------------------------------------------------------------------ // End of the writeable code region LEAF_ENTRY JIT_PatchedCodeLast, _TEXT ret lr LEAF_END JIT_PatchedCodeLast, _TEXT //------------------------------------------------ // 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, #-144 SAVE_ARGUMENT_REGISTERS sp, 16 SAVE_FLOAT_ARGUMENT_REGISTERS sp, 80 // 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, 80 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, #144 PATCH_LABEL VirtualMethodFixupPatchLabel // and tailcall to the actual method EPILOG_BRANCH_REG x12 NESTED_END VirtualMEthodFixupStub, _TEXT //------------------------------------------------ // 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 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 // // x12 = UMEntryThunk* // NESTED_ENTRY TheUMEntryPrestub, _TEXT, UnhandledExceptionHandlerUnix // Save arguments and return address PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, #-144 SAVE_ARGUMENT_REGISTERS sp, 16 SAVE_FLOAT_ARGUMENT_REGISTERS sp, 80 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, 80 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, #144 // 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, #-96 // 64 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, #88 SAVE_ARGUMENT_REGISTERS sp, 16 #define UMThunkStub_HiddenArg 80 // offset of saved UMEntryThunk * #define UMThunkStub_StackArgs 96 // 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 x0, [x19, #Thread__m_pDomain] // m_dwDomainId is 4 bytes so using 32-bit variant ldr w1, [x12, #UMEntryThunk__m_dwDomainId] ldr w0, [x0, #AppDomain__m_dwId] cmp w0, w1 bne LOCAL_LABEL(UMThunkStub_WrongAppDomain) 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, #88 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, #96 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) LOCAL_LABEL(UMThunkStub_WrongAppDomain): // Saving FP Args as this is read by UM2MThunk_WrapperHelper sub sp, sp, #SIZEOF__FloatArgumentRegisters SAVE_FLOAT_ARGUMENT_REGISTERS sp, 0 // UMEntryThunk* pUMEntry ldr x0, [fp, #UMThunkStub_HiddenArg] // void * pArgs add x2, fp, #16 // remaining arguments are unused bl C_FUNC(UM2MDoADCallBack) // restore integral return value ldr x0, [fp, #16] // restore FP or HFA return value RESTORE_FLOAT_ARGUMENT_REGISTERS sp, 0 b LOCAL_LABEL(UMThunkStub_PostCall) NESTED_END UMThunkStub, _TEXT // UM2MThunk_WrapperHelper(void *pThunkArgs, // x0 // int cbStackArgs, // x1 (unused) // void *pAddr, // x2 (unused) // UMEntryThunk *pEntryThunk,// x3 // Thread *pThread) // x4 // pThunkArgs points to the argument registers pushed on the stack by UMThunkStub NESTED_ENTRY UM2MThunk_WrapperHelper, _TEXT, NoHandler PROLOG_SAVE_REG_PAIR_INDEXED fp, lr, #-32 PROLOG_SAVE_REG x19, #16 // save pThunkArgs in non-volatile reg. It is required after return from call to ILStub mov x19, x0 // ARM64TODO - Is this required by ILStub mov x12, x3 //// x12 = UMEntryThunk * // // Note that layout of the arguments is given by UMThunkStub frame // ldr x3, [x3, #UMEntryThunk__m_pUMThunkMarshInfo] // m_cbActualArgSize is 4-byte field ldr w2, [x3, #UMThunkMarshInfo__m_cbActualArgSize] cbz w2, LOCAL_LABEL(UM2MThunk_WrapperHelper_RegArgumentsSetup) // extend to 64- bits uxtw x2, w2 // Source pointer. Subtracting 16 bytes due to fp & lr add x6, x0, #(UMThunkStub_StackArgs-16) // move source ptr to end of Stack Args add x6, x6, 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 x6, x6, x2 // increment stack slot pair count by 1 if x2 is not zero add x1, x1, x2, LSR #3 LOCAL_LABEL(UM2MThunk_WrapperHelper_StackLoop): ldp x4, x5, [x6, #-16]! stp x4, x5, [sp, #-16]! subs x1, x1, #1 bne LOCAL_LABEL(UM2MThunk_WrapperHelper_StackLoop) LOCAL_LABEL(UM2MThunk_WrapperHelper_RegArgumentsSetup): ldr x16, [x3, #(UMThunkMarshInfo__m_pILStub)] // reload floating point registers RESTORE_FLOAT_ARGUMENT_REGISTERS x0, -1 * (SIZEOF__FloatArgumentRegisters + 16) // reload argument registers RESTORE_ARGUMENT_REGISTERS x0, 0 blr x16 // save integral return value str x0, [x19] // save FP/HFA return values SAVE_FLOAT_ARGUMENT_REGISTERS x19, -1 * (SIZEOF__FloatArgumentRegisters + 16) EPILOG_STACK_RESTORE EPILOG_RESTORE_REG x19, #16 EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, #32 EPILOG_RETURN NESTED_END UM2MThunk_WrapperHelper, _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 fp, lr, #-144 // 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 d0, d1, [sp, #112] stp d2, d3, [sp, #128] mov x0, sp bl OnHijackWorker // restore any integral return value(s) ldp x0, x1, [sp, #96] // restore any FP/HFA return value(s) ldp d0, d1, [sp, #112] ldp d2, d3, [sp, #128] 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 fp, lr, #144 EPILOG_RETURN NESTED_END OnHijackTripThread, _TEXT #endif // FEATURE_HIJACK // ------------------------------------------------------------------ // Redirection Stub for GC in fully interruptible method //GenerateRedirectedHandledJITCaseStub GCThreadControl // ------------------------------------------------------------------ //GenerateRedirectedHandledJITCaseStub DbgThreadControl // ------------------------------------------------------------------ //GenerateRedirectedHandledJITCaseStub UserSuspend // ------------------------------------------------------------------ //GenerateRedirectedHandledJITCaseStub YieldTask #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 // Using below prolog instead of PROLOG_SAVE_REG_PAIR fp,lr, #-16 // 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 x19,x20, #-16 PROLOG_SAVE_REG fp, #0 PROLOG_SAVE_REG lr, #8 // 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. // // Save the SP of this function str fp, [x3] ldr fp, [x2, #80] // offset of fp in CONTEXT relative to X19 // Invoke the funclet blr x1 nop EPILOG_RESTORE_REG_PAIR_INDEXED fp, lr, #16 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 // ------------------------------------------------------------------ // // Helpers for async (NullRef, AccessViolation) exceptions // NESTED_ENTRY NakedThrowHelper2, _TEXT ,FixContextHandler PROLOG_SAVE_REG_PAIR_INDEXED fp,lr, #-16 // On entry: // // X0 = Address of FaultingExceptionFrame bl C_FUNC(LinkFrameAndThrow) // Target should not return. EMIT_BREAKPOINT NESTED_END NakedThrowHelper2, _TEXT GenerateRedirectedStubWithFrame NakedThrowHelper, NakedThrowHelper2 #ifdef FEATURE_READYTORUN NESTED_ENTRY DelayLoad_MethodCall_FakeProlog, _TEXT, NoHandler DelayLoad_MethodCall: .global DelayLoad_MethodCall EMIT_BREAKPOINT 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 EMIT_BREAKPOINT 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, x12:DispatchToken) // // 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 StubDispatchFixupWorker mov x9, x0 EPILOG_WITH_TRANSITION_BLOCK_TAILCALL PATCH_LABEL StubDispatchFixupPatchLabel EPILOG_BRANCH_REG x9 NESTED_END StubDispatchFixupStub, _TEXT #endif