| //===-- DNBArchImpl.h -------------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // Created by Greg Clayton on 6/25/07. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef __DebugNubArchMachARM_h__ |
| #define __DebugNubArchMachARM_h__ |
| |
| #if defined (__arm__) |
| |
| #include "DNBArch.h" |
| #if defined (USE_ARM_DISASSEMBLER_FRAMEWORK) |
| #include <ARMDisassembler/ARMDisassembler.h> |
| #endif |
| |
| class MachThread; |
| |
| class DNBArchMachARM : public DNBArchProtocol |
| { |
| public: |
| enum { kMaxNumThumbITBreakpoints = 4 }; |
| |
| DNBArchMachARM(MachThread *thread) : |
| m_thread(thread), |
| m_state(), |
| m_hw_single_chained_step_addr(INVALID_NUB_ADDRESS), |
| m_sw_single_step_next_pc(INVALID_NUB_ADDRESS), |
| m_sw_single_step_break_id(INVALID_NUB_BREAK_ID), |
| m_sw_single_step_itblock_break_count(0), |
| m_last_decode_pc(INVALID_NUB_ADDRESS), |
| m_watchpoint_hw_index(-1), |
| m_watchpoint_did_occur(false), |
| m_watchpoint_resume_single_step_enabled(false) |
| { |
| memset(&m_dbg_save, 0, sizeof(m_dbg_save)); |
| #if defined (USE_ARM_DISASSEMBLER_FRAMEWORK) |
| ThumbStaticsInit(&m_last_decode_thumb); |
| #endif |
| for (int i = 0; i < kMaxNumThumbITBreakpoints; i++) |
| m_sw_single_step_itblock_break_id[i] = INVALID_NUB_BREAK_ID; |
| } |
| |
| virtual ~DNBArchMachARM() |
| { |
| } |
| |
| static void Initialize(); |
| static const DNBRegisterSetInfo * |
| GetRegisterSetInfo(nub_size_t *num_reg_sets); |
| |
| virtual bool GetRegisterValue(int set, int reg, DNBRegisterValue *value); |
| virtual bool SetRegisterValue(int set, int reg, const DNBRegisterValue *value); |
| virtual nub_size_t GetRegisterContext (void *buf, nub_size_t buf_len); |
| virtual nub_size_t SetRegisterContext (const void *buf, nub_size_t buf_len); |
| |
| virtual kern_return_t GetRegisterState (int set, bool force); |
| virtual kern_return_t SetRegisterState (int set); |
| virtual bool RegisterSetStateIsValid (int set) const; |
| |
| virtual uint64_t GetPC(uint64_t failValue); // Get program counter |
| virtual kern_return_t SetPC(uint64_t value); |
| virtual uint64_t GetSP(uint64_t failValue); // Get stack pointer |
| virtual void ThreadWillResume(); |
| virtual bool ThreadDidStop(); |
| virtual bool NotifyException(MachException::Data& exc); |
| |
| static DNBArchProtocol *Create (MachThread *thread); |
| static const uint8_t * const SoftwareBreakpointOpcode (nub_size_t byte_size); |
| static uint32_t GetCPUType(); |
| |
| virtual uint32_t NumSupportedHardwareBreakpoints(); |
| virtual uint32_t NumSupportedHardwareWatchpoints(); |
| virtual uint32_t EnableHardwareBreakpoint (nub_addr_t addr, nub_size_t size); |
| virtual uint32_t EnableHardwareWatchpoint (nub_addr_t addr, nub_size_t size, bool read, bool write); |
| virtual bool DisableHardwareBreakpoint (uint32_t hw_break_index); |
| virtual bool DisableHardwareWatchpoint (uint32_t hw_break_index); |
| virtual bool EnableHardwareWatchpoint0 (uint32_t hw_break_index, bool Delegate); |
| virtual bool DisableHardwareWatchpoint0 (uint32_t hw_break_index, bool Delegate); |
| virtual bool StepNotComplete (); |
| virtual void HardwareWatchpointStateChanged (); |
| virtual uint32_t GetHardwareWatchpointHit(nub_addr_t &addr); |
| |
| typedef arm_debug_state_t DBG; |
| |
| protected: |
| |
| |
| kern_return_t EnableHardwareSingleStep (bool enable); |
| kern_return_t SetSingleStepSoftwareBreakpoints (); |
| |
| bool ConditionPassed(uint8_t condition, uint32_t cpsr); |
| #if defined (USE_ARM_DISASSEMBLER_FRAMEWORK) |
| bool ComputeNextPC(nub_addr_t currentPC, arm_decoded_instruction_t decodedInstruction, bool currentPCIsThumb, nub_addr_t *targetPC); |
| arm_error_t DecodeInstructionUsingDisassembler(nub_addr_t curr_pc, uint32_t curr_cpsr, arm_decoded_instruction_t *decodedInstruction, thumb_static_data_t *thumbStaticData, nub_addr_t *next_pc); |
| void DecodeITBlockInstructions(nub_addr_t curr_pc); |
| #endif |
| void EvaluateNextInstructionForSoftwareBreakpointSetup(nub_addr_t currentPC, uint32_t cpsr, bool currentPCIsThumb, nub_addr_t *nextPC, bool *nextPCIsThumb); |
| static nub_bool_t BreakpointHit (nub_process_t pid, nub_thread_t tid, nub_break_t breakID, void *baton); |
| |
| typedef enum RegisterSetTag |
| { |
| e_regSetALL = REGISTER_SET_ALL, |
| e_regSetGPR = ARM_THREAD_STATE, |
| e_regSetVFP = ARM_VFP_STATE, |
| e_regSetEXC = ARM_EXCEPTION_STATE, |
| e_regSetDBG = ARM_DEBUG_STATE, |
| kNumRegisterSets |
| } RegisterSet; |
| |
| enum |
| { |
| Read = 0, |
| Write = 1, |
| kNumErrors = 2 |
| }; |
| |
| typedef arm_thread_state_t GPR; |
| typedef arm_vfp_state_t FPU; |
| typedef arm_exception_state_t EXC; |
| |
| static const DNBRegisterInfo g_gpr_registers[]; |
| static const DNBRegisterInfo g_vfp_registers[]; |
| static const DNBRegisterInfo g_exc_registers[]; |
| static const DNBRegisterSetInfo g_reg_sets[]; |
| |
| static const size_t k_num_gpr_registers; |
| static const size_t k_num_vfp_registers; |
| static const size_t k_num_exc_registers; |
| static const size_t k_num_all_registers; |
| static const size_t k_num_register_sets; |
| |
| struct Context |
| { |
| GPR gpr; |
| FPU vfp; |
| EXC exc; |
| }; |
| |
| // See also HardwareWatchpointStateChanged() which updates this class-wide variable. |
| static DBG Global_Debug_State; |
| static bool Valid_Global_Debug_State; |
| |
| struct State |
| { |
| Context context; |
| DBG dbg; |
| kern_return_t gpr_errs[2]; // Read/Write errors |
| kern_return_t vfp_errs[2]; // Read/Write errors |
| kern_return_t exc_errs[2]; // Read/Write errors |
| kern_return_t dbg_errs[2]; // Read/Write errors |
| State() |
| { |
| uint32_t i; |
| for (i=0; i<kNumErrors; i++) |
| { |
| gpr_errs[i] = -1; |
| vfp_errs[i] = -1; |
| exc_errs[i] = -1; |
| dbg_errs[i] = -1; |
| } |
| } |
| void InvalidateRegisterSetState(int set) |
| { |
| SetError (set, Read, -1); |
| } |
| kern_return_t GetError (int set, uint32_t err_idx) const |
| { |
| if (err_idx < kNumErrors) |
| { |
| switch (set) |
| { |
| // When getting all errors, just OR all values together to see if |
| // we got any kind of error. |
| case e_regSetALL: return gpr_errs[err_idx] | |
| vfp_errs[err_idx] | |
| exc_errs[err_idx] | |
| dbg_errs[err_idx] ; |
| case e_regSetGPR: return gpr_errs[err_idx]; |
| case e_regSetVFP: return vfp_errs[err_idx]; |
| case e_regSetEXC: return exc_errs[err_idx]; |
| case e_regSetDBG: return dbg_errs[err_idx]; |
| default: break; |
| } |
| } |
| return -1; |
| } |
| bool SetError (int set, uint32_t err_idx, kern_return_t err) |
| { |
| if (err_idx < kNumErrors) |
| { |
| switch (set) |
| { |
| case e_regSetALL: |
| gpr_errs[err_idx] = err; |
| vfp_errs[err_idx] = err; |
| dbg_errs[err_idx] = err; |
| exc_errs[err_idx] = err; |
| return true; |
| |
| case e_regSetGPR: |
| gpr_errs[err_idx] = err; |
| return true; |
| |
| case e_regSetVFP: |
| vfp_errs[err_idx] = err; |
| return true; |
| |
| case e_regSetEXC: |
| exc_errs[err_idx] = err; |
| return true; |
| |
| case e_regSetDBG: |
| dbg_errs[err_idx] = err; |
| return true; |
| default: break; |
| } |
| } |
| return false; |
| } |
| bool RegsAreValid (int set) const |
| { |
| return GetError(set, Read) == KERN_SUCCESS; |
| } |
| }; |
| |
| kern_return_t GetGPRState (bool force); |
| kern_return_t GetVFPState (bool force); |
| kern_return_t GetEXCState (bool force); |
| kern_return_t GetDBGState (bool force); |
| |
| kern_return_t SetGPRState (); |
| kern_return_t SetVFPState (); |
| kern_return_t SetEXCState (); |
| kern_return_t SetDBGState (); |
| |
| // Helper functions for watchpoint implementaions. |
| static void ClearWatchpointOccurred(); |
| static bool HasWatchpointOccurred(); |
| static bool IsWatchpointEnabled(const DBG &debug_state, uint32_t hw_index); |
| static nub_addr_t GetWatchAddress(const DBG &debug_state, uint32_t hw_index); |
| |
| protected: |
| MachThread * m_thread; |
| State m_state; |
| DBG m_dbg_save; |
| nub_addr_t m_hw_single_chained_step_addr; |
| // Software single stepping support |
| nub_addr_t m_sw_single_step_next_pc; |
| nub_break_t m_sw_single_step_break_id; |
| nub_break_t m_sw_single_step_itblock_break_id[kMaxNumThumbITBreakpoints]; |
| nub_addr_t m_sw_single_step_itblock_break_count; |
| // Disassembler state |
| #if defined (USE_ARM_DISASSEMBLER_FRAMEWORK) |
| thumb_static_data_t m_last_decode_thumb; |
| arm_decoded_instruction_t m_last_decode_arm; |
| #endif |
| nub_addr_t m_last_decode_pc; |
| |
| // The following member variables should be updated atomically. |
| int32_t m_watchpoint_hw_index; |
| bool m_watchpoint_did_occur; |
| bool m_watchpoint_resume_single_step_enabled; |
| }; |
| |
| #endif // #if defined (__arm__) |
| #endif // #ifndef __DebugNubArchMachARM_h__ |
