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| //===-- RegisterContextDarwin_arm64.h -----------------------------*- C++
//-*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_RegisterContextDarwin_arm64_h_
#define liblldb_RegisterContextDarwin_arm64_h_
#include "lldb/Target/RegisterContext.h"
#include "lldb/lldb-private.h"
// Break only in privileged or user mode
#define S_RSVD ((uint32_t)(0u << 1))
#define S_PRIV ((uint32_t)(1u << 1))
#define S_USER ((uint32_t)(2u << 1))
#define S_PRIV_USER ((S_PRIV) | (S_USER))
#define WCR_ENABLE ((uint32_t)(1u))
// Watchpoint load/store
#define WCR_LOAD ((uint32_t)(1u << 3))
#define WCR_STORE ((uint32_t)(1u << 4))
class RegisterContextDarwin_arm64 : public lldb_private::RegisterContext {
public:
RegisterContextDarwin_arm64(lldb_private::Thread &thread,
uint32_t concrete_frame_idx);
~RegisterContextDarwin_arm64() override;
void InvalidateAllRegisters() override;
size_t GetRegisterCount() override;
const lldb_private::RegisterInfo *GetRegisterInfoAtIndex(size_t reg) override;
size_t GetRegisterSetCount() override;
const lldb_private::RegisterSet *GetRegisterSet(size_t set) override;
bool ReadRegister(const lldb_private::RegisterInfo *reg_info,
lldb_private::RegisterValue ®_value) override;
bool WriteRegister(const lldb_private::RegisterInfo *reg_info,
const lldb_private::RegisterValue ®_value) override;
bool ReadAllRegisterValues(lldb::DataBufferSP &data_sp) override;
bool WriteAllRegisterValues(const lldb::DataBufferSP &data_sp) override;
uint32_t ConvertRegisterKindToRegisterNumber(lldb::RegisterKind kind,
uint32_t num) override;
uint32_t NumSupportedHardwareWatchpoints() override;
uint32_t SetHardwareWatchpoint(lldb::addr_t addr, size_t size, bool read,
bool write) override;
bool ClearHardwareWatchpoint(uint32_t hw_index) override;
// mirrors <mach/arm/thread_status.h> arm_thread_state64_t
struct GPR {
uint64_t x[29]; // x0-x28
uint64_t fp; // x29
uint64_t lr; // x30
uint64_t sp; // x31
uint64_t pc; // pc
uint32_t cpsr; // cpsr
};
struct VReg {
alignas(16) char bytes[16];
};
// mirrors <mach/arm/thread_status.h> arm_neon_state64_t
struct FPU {
VReg v[32];
uint32_t fpsr;
uint32_t fpcr;
};
// mirrors <mach/arm/thread_status.h> arm_exception_state64_t
struct EXC {
uint64_t far; // Virtual Fault Address
uint32_t esr; // Exception syndrome
uint32_t exception; // number of arm exception token
};
// mirrors <mach/arm/thread_status.h> arm_debug_state64_t
struct DBG {
uint64_t bvr[16];
uint64_t bcr[16];
uint64_t wvr[16];
uint64_t wcr[16];
uint64_t mdscr_el1;
};
static void LogDBGRegisters(lldb_private::Log *log, const DBG &dbg);
protected:
enum {
GPRRegSet = 6, // ARM_THREAD_STATE64
FPURegSet = 17, // ARM_NEON_STATE64
EXCRegSet = 7, // ARM_EXCEPTION_STATE64
DBGRegSet = 15 // ARM_DEBUG_STATE64
};
enum {
GPRWordCount = sizeof(GPR) / sizeof(uint32_t), // ARM_THREAD_STATE64_COUNT
FPUWordCount = sizeof(FPU) / sizeof(uint32_t), // ARM_NEON_STATE64_COUNT
EXCWordCount =
sizeof(EXC) / sizeof(uint32_t), // ARM_EXCEPTION_STATE64_COUNT
DBGWordCount = sizeof(DBG) / sizeof(uint32_t) // ARM_DEBUG_STATE64_COUNT
};
enum { Read = 0, Write = 1, kNumErrors = 2 };
GPR gpr;
FPU fpu;
EXC exc;
DBG dbg;
int gpr_errs[2]; // Read/Write errors
int fpu_errs[2]; // Read/Write errors
int exc_errs[2]; // Read/Write errors
int dbg_errs[2]; // Read/Write errors
void InvalidateAllRegisterStates() {
SetError(GPRRegSet, Read, -1);
SetError(FPURegSet, Read, -1);
SetError(EXCRegSet, Read, -1);
}
int GetError(int flavor, uint32_t err_idx) const {
if (err_idx < kNumErrors) {
switch (flavor) {
// When getting all errors, just OR all values together to see if
// we got any kind of error.
case GPRRegSet:
return gpr_errs[err_idx];
case FPURegSet:
return fpu_errs[err_idx];
case EXCRegSet:
return exc_errs[err_idx];
case DBGRegSet:
return dbg_errs[err_idx];
default:
break;
}
}
return -1;
}
bool SetError(int flavor, uint32_t err_idx, int err) {
if (err_idx < kNumErrors) {
switch (flavor) {
case GPRRegSet:
gpr_errs[err_idx] = err;
return true;
case FPURegSet:
fpu_errs[err_idx] = err;
return true;
case EXCRegSet:
exc_errs[err_idx] = err;
return true;
case DBGRegSet:
exc_errs[err_idx] = err;
return true;
default:
break;
}
}
return false;
}
bool RegisterSetIsCached(int set) const { return GetError(set, Read) == 0; }
int ReadGPR(bool force);
int ReadFPU(bool force);
int ReadEXC(bool force);
int ReadDBG(bool force);
int WriteGPR();
int WriteFPU();
int WriteEXC();
int WriteDBG();
// Subclasses override these to do the actual reading.
virtual int DoReadGPR(lldb::tid_t tid, int flavor, GPR &gpr) { return -1; }
virtual int DoReadFPU(lldb::tid_t tid, int flavor, FPU &fpu) = 0;
virtual int DoReadEXC(lldb::tid_t tid, int flavor, EXC &exc) = 0;
virtual int DoReadDBG(lldb::tid_t tid, int flavor, DBG &dbg) = 0;
virtual int DoWriteGPR(lldb::tid_t tid, int flavor, const GPR &gpr) = 0;
virtual int DoWriteFPU(lldb::tid_t tid, int flavor, const FPU &fpu) = 0;
virtual int DoWriteEXC(lldb::tid_t tid, int flavor, const EXC &exc) = 0;
virtual int DoWriteDBG(lldb::tid_t tid, int flavor, const DBG &dbg) = 0;
int ReadRegisterSet(uint32_t set, bool force);
int WriteRegisterSet(uint32_t set);
static uint32_t GetRegisterNumber(uint32_t reg_kind, uint32_t reg_num);
static int GetSetForNativeRegNum(int reg_num);
static size_t GetRegisterInfosCount();
static const lldb_private::RegisterInfo *GetRegisterInfos();
};
#endif // liblldb_RegisterContextDarwin_arm64_h_
|