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AArch64 Exceptions.Debug Pseudocode
Library pseudocode for aarch64/exceptions/debug/AArch64.BreakpointException
// AArch64.BreakpointException() // ============================= AArch64.BreakpointException(FaultRecord fault) assert PSTATE.EL != EL3; route_to_el2 = (PSTATE.EL IN {EL0, EL1} && EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.TDE == '1')); bits(64) preferred_exception_return = ThisInstrAddr(); vect_offset = 0x0; vaddress = bits(64) UNKNOWN; exception = AArch64.AbortSyndrome(Exception_Breakpoint, fault, vaddress); if PSTATE.EL == EL2 || route_to_el2 then AArch64.TakeException(EL2, exception, preferred_exception_return, vect_offset); else AArch64.TakeException(EL1, exception, preferred_exception_return, vect_offset);
Library pseudocode for aarch64/exceptions/debug/AArch64.SoftwareBreakpoint
// AArch64.SoftwareBreakpoint() // ============================ AArch64.SoftwareBreakpoint(bits(16) immediate) route_to_el2 = (PSTATE.EL IN {EL0, EL1} && EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.TDE == '1')); bits(64) preferred_exception_return = ThisInstrAddr(); vect_offset = 0x0; exception = ExceptionSyndrome(Exception_SoftwareBreakpoint); exception.syndrome<15:0> = immediate; if UInt(PSTATE.EL) > UInt(EL1) then AArch64.TakeException(PSTATE.EL, exception, preferred_exception_return, vect_offset); elsif route_to_el2 then AArch64.TakeException(EL2, exception, preferred_exception_return, vect_offset); else AArch64.TakeException(EL1, exception, preferred_exception_return, vect_offset);
Library pseudocode for aarch64/exceptions/debug/AArch64.SoftwareStepException
// AArch64.SoftwareStepException() // =============================== AArch64.SoftwareStepException() assert PSTATE.EL != EL3; route_to_el2 = (PSTATE.EL IN {EL0, EL1} && EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.TDE == '1')); bits(64) preferred_exception_return = ThisInstrAddr(); vect_offset = 0x0; exception = ExceptionSyndrome(Exception_SoftwareStep); if SoftwareStep_DidNotStep() then exception.syndrome<24> = '0'; else exception.syndrome<24> = '1'; exception.syndrome<6> = if SoftwareStep_SteppedEX() then '1' else '0'; if PSTATE.EL == EL2 || route_to_el2 then AArch64.TakeException(EL2, exception, preferred_exception_return, vect_offset); else AArch64.TakeException(EL1, exception, preferred_exception_return, vect_offset);
Library pseudocode for aarch64/exceptions/debug/AArch64.VectorCatchException
// AArch64.VectorCatchException() // ============================== // Vector Catch taken from EL0 or EL1 to EL2. This can only be called when debug exceptions are // being routed to EL2, as Vector Catch is a legacy debug event. AArch64.VectorCatchException(FaultRecord fault) assert PSTATE.EL != EL2; assert EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.TDE == '1'); bits(64) preferred_exception_return = ThisInstrAddr(); vect_offset = 0x0; vaddress = bits(64) UNKNOWN; exception = AArch64.AbortSyndrome(Exception_VectorCatch, fault, vaddress); AArch64.TakeException(EL2, exception, preferred_exception_return, vect_offset);
Library pseudocode for aarch64/exceptions/debug/AArch64.WatchpointException
// AArch64.WatchpointException() // ============================= AArch64.WatchpointException(bits(64) vaddress, FaultRecord fault) assert PSTATE.EL != EL3; route_to_el2 = (PSTATE.EL IN {EL0, EL1} && EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.TDE == '1')); bits(64) preferred_exception_return = ThisInstrAddr(); vect_offset = 0x0; if HaveNV2Ext() && fault.acctype == AccType_NV2REGISTER then exception = AArch64.AbortSyndrome(Exception_NV2Watchpoint, fault, vaddress); else exception = AArch64.AbortSyndrome(Exception_Watchpoint, fault, vaddress); if PSTATE.EL == EL2 || route_to_el2 then AArch64.TakeException(EL2, exception, preferred_exception_return, vect_offset); else AArch64.TakeException(EL1, exception, preferred_exception_return, vect_offset);