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dmnt: first pass at breakpoints/watchpoints

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This commit is contained in:
Michael Scire 2021-07-22 00:51:28 -07:00 committed by SciresM
parent 1401f3520e
commit d216a77187
15 changed files with 1606 additions and 5 deletions
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2
stratosphere/dmnt.gen2/dmnt.gen2.json
View file

@ -22,7 +22,7 @@
"value": {
"highest_thread_priority": 63,
"lowest_thread_priority": 24,
"lowest_cpu_id": 3,
"lowest_cpu_id": 0,
"highest_cpu_id": 3
}
}, {

54
stratosphere/dmnt.gen2/source/dmnt2_breakpoint_manager.cpp Normal file
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@ -0,0 +1,54 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "dmnt2_breakpoint_manager.hpp"
#include "dmnt2_debug_process.hpp"
#include "dmnt2_debug_log.hpp"
namespace ams::dmnt {
BreakPointManager::BreakPointManager(DebugProcess *debug_process) : BreakPointManagerBase(debug_process) {
/* ... */
}
void BreakPointManager::ClearStep() {
BreakPoint *bp = nullptr;
for (size_t i = 0; (bp = static_cast<BreakPoint *>(this->GetBreakPoint(i))) != nullptr; ++i) {
if (bp->m_in_use && bp->m_is_step) {
AMS_DMNT2_GDB_LOG_DEBUG("BreakPointManager::ClearStep %p 0x%lx (idx=%zu)\n", bp, bp->m_address, i);
bp->Clear(m_debug_process);
}
}
}
Result BreakPointManager::SetBreakPoint(uintptr_t address, size_t size, bool is_step) {
/* Get a free breakpoint. */
BreakPoint *bp = static_cast<BreakPoint *>(this->GetFreeBreakPoint());
/* Set the breakpoint. */
Result result = svc::ResultOutOfHandles();
if (bp != nullptr) {
result = bp->Set(m_debug_process, address, size, is_step);
}
if (R_FAILED(result)) {
AMS_DMNT2_GDB_LOG_DEBUG("BreakPointManager::SetBreakPoint %p 0x%lx !!! Fail 0x%08x !!!\n", bp, bp->m_address, result.GetValue());
}
return result;
}
}

41
stratosphere/dmnt.gen2/source/dmnt2_breakpoint_manager.hpp Normal file
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@ -0,0 +1,41 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#include "dmnt2_breakpoint_manager_base.hpp"
namespace ams::dmnt {
class DebugProcess;
struct BreakPoint : public BreakPointBase {
bool m_is_step;
BreakPoint() { /* ... */ }
virtual Result Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool is_step) = 0;
};
class BreakPointManager : public BreakPointManagerBase {
public:
explicit BreakPointManager(DebugProcess *debug_process);
void ClearStep();
Result SetBreakPoint(uintptr_t address, size_t size, bool is_step);
};
}

64
stratosphere/dmnt.gen2/source/dmnt2_breakpoint_manager_base.cpp Normal file
View file

@ -0,0 +1,64 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "dmnt2_breakpoint_manager_base.hpp"
#include "dmnt2_debug_process.hpp"
#include "dmnt2_debug_log.hpp"
namespace ams::dmnt {
BreakPointManagerBase::BreakPointManagerBase(DebugProcess *debug_process) : m_debug_process(debug_process) {
/* ... */
}
void BreakPointManagerBase::ClearAll() {
BreakPointBase *bp = nullptr;
for (size_t i = 0; (bp = static_cast<BreakPointBase *>(this->GetBreakPoint(i))) != nullptr; ++i) {
if (bp->m_in_use) {
bp->Clear(m_debug_process);
}
}
}
void BreakPointManagerBase::Reset() {
BreakPointBase *bp = nullptr;
for (size_t i = 0; (bp = static_cast<BreakPointBase *>(this->GetBreakPoint(i))) != nullptr; ++i) {
bp->Reset();
}
}
Result BreakPointManagerBase::ClearBreakPoint(uintptr_t address, size_t size) {
BreakPointBase *bp = nullptr;
for (size_t i = 0; (bp = static_cast<BreakPointBase *>(this->GetBreakPoint(i))) != nullptr; ++i) {
if (bp->m_in_use && bp->m_address == address) {
AMS_ABORT_UNLESS(bp->m_size == size);
return bp->Clear(m_debug_process);
}
}
return ResultSuccess();
}
BreakPointBase *BreakPointManagerBase::GetFreeBreakPoint() {
BreakPointBase *bp = nullptr;
for (size_t i = 0; (bp = static_cast<BreakPointBase *>(this->GetBreakPoint(i))) != nullptr; ++i) {
if (!bp->m_in_use) {
return bp;
}
}
return nullptr;
}
}

50
stratosphere/dmnt.gen2/source/dmnt2_breakpoint_manager_base.hpp Normal file
View file

@ -0,0 +1,50 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
namespace ams::dmnt {
class DebugProcess;
struct BreakPointBase {
bool m_in_use;
uintptr_t m_address;
size_t m_size;
BreakPointBase() : m_in_use(false) { /* ... */ }
void Reset() { m_in_use = false; }
virtual Result Clear(DebugProcess *debug_process) = 0;
};
class BreakPointManagerBase {
protected:
DebugProcess *m_debug_process;
public:
explicit BreakPointManagerBase(DebugProcess *debug_process);
void ClearAll();
void Reset();
Result ClearBreakPoint(uintptr_t address, size_t size);
protected:
virtual BreakPointBase *GetBreakPoint(size_t index) = 0;
BreakPointBase *GetFreeBreakPoint();
};
}

195
stratosphere/dmnt.gen2/source/dmnt2_debug_process.cpp
View file

@ -19,6 +19,14 @@
namespace ams::dmnt {
namespace {
s32 SignExtend(u32 value, u32 bits) {
return static_cast<s32>(value << (32 - bits)) >> (32 - bits);
}
}
Result DebugProcess::Attach(os::ProcessId process_id) {
/* Attach to the process. */
R_TRY(svc::DebugActiveProcess(std::addressof(m_debug_handle), process_id.value));
@ -39,6 +47,10 @@ namespace ams::dmnt {
void DebugProcess::Detach() {
if (m_is_valid) {
m_software_breakpoints.ClearAll();
m_hardware_breakpoints.ClearAll();
m_hardware_watchpoints.ClearAll();
R_ABORT_UNLESS(svc::CloseHandle(m_debug_handle));
m_debug_handle = svc::InvalidHandle;
}
@ -213,6 +225,189 @@ namespace ams::dmnt {
return svc::WriteDebugProcessMemory(m_debug_handle, reinterpret_cast<uintptr_t>(src), address, size);
}
Result DebugProcess::Continue() {
AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Continue() all\n");
u64 thread_ids[] = { 0 };
R_TRY(svc::ContinueDebugEvent(m_debug_handle, svc::ContinueFlag_ExceptionHandled | svc::ContinueFlag_EnableExceptionEvent | svc::ContinueFlag_ContinueAll, thread_ids, util::size(thread_ids)));
m_continue_thread_id = 0;
m_status = ProcessStatus_Running;
this->SetLastThreadId(0);
this->SetLastSignal(GdbSignal_Signal0);
return ResultSuccess();
}
Result DebugProcess::Continue(u64 thread_id) {
AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Continue() thread_id=%lx\n", thread_id);
u64 thread_ids[] = { thread_id };
R_TRY(svc::ContinueDebugEvent(m_debug_handle, svc::ContinueFlag_ExceptionHandled | svc::ContinueFlag_EnableExceptionEvent, thread_ids, util::size(thread_ids)));
m_continue_thread_id = thread_id;
m_status = ProcessStatus_Running;
this->SetLastThreadId(0);
this->SetLastSignal(GdbSignal_Signal0);
return ResultSuccess();
}
Result DebugProcess::Step() {
AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Step() all\n");
return this->Step(this->GetLastThreadId());
}
Result DebugProcess::Step(u64 thread_id) {
AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Step() thread_id=%lx\n", thread_id);
/* Get the thread context. */
svc::ThreadContext ctx;
R_TRY(this->GetThreadContext(std::addressof(ctx), thread_id, svc::ThreadContextFlag_Control));
/* Note that we're stepping. */
m_stepping = true;
/* Determine where we're stepping to. */
u64 current_pc = ctx.pc;
u64 step_target = 0;
this->GetBranchTarget(ctx, thread_id, current_pc, step_target);
/* Ensure we end with valid breakpoints. */
auto bp_guard = SCOPE_GUARD { this->ClearStep(); };
/* Set step breakpoint on current pc. */
/* TODO: aarch32 breakpoints. */
if (current_pc) {
R_TRY(m_step_breakpoints.SetBreakPoint(current_pc, sizeof(u32), true));
}
if (step_target) {
R_TRY(m_step_breakpoints.SetBreakPoint(step_target, sizeof(u32), true));
}
bp_guard.Cancel();
return ResultSuccess();
}
void DebugProcess::ClearStep() {
/* If we should, clear our step breakpoints. */
if (m_stepping) {
m_step_breakpoints.ClearStep();
m_stepping = false;
}
}
Result DebugProcess::Break() {
if (this->GetStatus() == ProcessStatus_Running) {
AMS_DMNT2_GDB_LOG_DEBUG("DebugProcess::Break\n");
return svc::BreakDebugProcess(m_debug_handle);
} else {
AMS_DMNT2_GDB_LOG_ERROR("DebugProcess::Break called on non-running process!\n");
return ResultSuccess();
}
}
void DebugProcess::GetBranchTarget(svc::ThreadContext &ctx, u64 thread_id, u64 &current_pc, u64 &target) {
/* Save pc, in case we modify it. */
const u64 pc = current_pc;
/* Clear the target. */
target = 0;
/* By default, we advance by four. */
current_pc += 4;
/* Get the instruction where we were. */
u32 insn = 0;
this->ReadMemory(std::addressof(insn), pc, sizeof(insn));
/* Handle by architecture. */
bool is_call = false;
if (this->Is64Bit()) {
if ((insn & 0x7C000000) == 0x14000000) {
/* Unconditional branch (b/bl) */
if (insn != 0x14000001) {
is_call = (insn & 0x80000000) == 0x80000000;
current_pc = 0;
target = SignExtend(((insn & 0x03FFFFFF) << 2), 28) + pc;
}
} else if ((insn & 0x7E000000) == 0x34000000) {
/* Compare/Branch (cbz/cbnz) */
target = SignExtend(((insn & 0x00FFFFE0) >> 3), 21) + pc;
} else if ((insn & 0x7E000000) == 0x36000000) {
/* Test and branch (tbz/tbnz) */
target = SignExtend(((insn & 0x0007FFE0) >> 3), 16) + pc;
} else if ((insn & 0xFF000010) == 0x54000000) {
/* Conditional branch (b.*) */
if ((insn & 0xF) == 0xE) {
/* Unconditional. */
current_pc = 0;
}
target = SignExtend(((insn & 0x00FFFFE0) >> 3), 21) + pc;
} else if ((insn & 0xFF8FFC1F) == 0xD60F0000) {
/* Unconditional branch */
is_call = (insn & 0x00F00000) == 0x00300000;
if (!is_call) {
current_pc = 0;
}
/* Get the register. */
svc::ThreadContext new_ctx;
if (R_SUCCEEDED(this->GetThreadContext(std::addressof(new_ctx), thread_id, svc::ThreadContextFlag_Control | svc::ThreadContextFlag_General))) {
const int reg = (insn & 0x03E0) >> 5;
if (reg < 29) {
target = new_ctx.r[reg];
} else if (reg == 29) {
target = new_ctx.fp;
} else if (reg == 30) {
target = new_ctx.lr;
} else if (reg == 31) {
target = new_ctx.sp;
}
}
}
} else {
/* TODO aarch32 branch decoding */
}
}
Result DebugProcess::SetBreakPoint(uintptr_t address, size_t size, bool is_step) {
return m_software_breakpoints.SetBreakPoint(address, size, is_step);
}
Result DebugProcess::ClearBreakPoint(uintptr_t address, size_t size) {
m_software_breakpoints.ClearBreakPoint(address, size);
return ResultSuccess();
}
Result DebugProcess::SetHardwareBreakPoint(uintptr_t address, size_t size, bool is_step) {
return m_hardware_breakpoints.SetBreakPoint(address, size, is_step);
}
Result DebugProcess::ClearHardwareBreakPoint(uintptr_t address, size_t size) {
m_hardware_breakpoints.ClearBreakPoint(address, size);
return ResultSuccess();
}
Result DebugProcess::SetWatchPoint(u64 address, u64 size, bool read, bool write) {
return m_hardware_watchpoints.SetWatchPoint(address, size, read, write);
}
Result DebugProcess::ClearWatchPoint(u64 address, u64 size) {
return m_hardware_watchpoints.ClearBreakPoint(address, size);
}
Result DebugProcess::GetWatchPointInfo(u64 address, bool &read, bool &write) {
return m_hardware_watchpoints.GetWatchPointInfo(address, read, write);
}
bool DebugProcess::IsValidWatchPoint(u64 address, u64 size) {
return HardwareWatchPointManager::IsValidWatchPoint(address, size);
}
Result DebugProcess::GetThreadCurrentCore(u32 *out, u64 thread_id) {
u64 dummy_value;
u32 val32 = 0;

36
stratosphere/dmnt.gen2/source/dmnt2_debug_process.hpp
View file

@ -17,6 +17,9 @@
#include <stratosphere.hpp>
#include "dmnt2_gdb_signal.hpp"
#include "dmnt2_module_definition.hpp"
#include "dmnt2_software_breakpoint.hpp"
#include "dmnt2_hardware_breakpoint.hpp"
#include "dmnt2_hardware_watchpoint.hpp"
namespace ams::dmnt {
@ -45,17 +48,24 @@ namespace ams::dmnt {
ProcessStatus m_status{ProcessStatus_DebugBreak};
os::ProcessId m_process_id{os::InvalidProcessId};
u64 m_last_thread_id{};
u64 m_thread_id_override;
u64 m_thread_id_override{};
u64 m_continue_thread_id{};
GdbSignal m_last_signal{};
bool m_stepping{false};
bool m_thread_valid[ThreadCountMax]{};
u64 m_thread_ids[ThreadCountMax]{};
osdbg::ThreadInfo m_thread_infos[ThreadCountMax]{};
svc::DebugInfoCreateProcess m_create_process_info{};
SoftwareBreakPointManager m_software_breakpoints;
HardwareBreakPointManager m_hardware_breakpoints;
HardwareWatchPointManager m_hardware_watchpoints;
BreakPointManager &m_step_breakpoints;
ModuleDefinition m_module_definitions[ModuleCountMax]{};
size_t m_module_count{};
size_t m_main_module{};
public:
constexpr DebugProcess() = default;
/* TODO: ifdef for hardware breakpoints. */
DebugProcess() : m_software_breakpoints(this), m_hardware_breakpoints(this), m_hardware_watchpoints(this), m_step_breakpoints(m_software_breakpoints) { /* ... */ }
~DebugProcess() { this->Detach(); }
svc::Handle GetHandle() const { return m_debug_handle; }
@ -102,9 +112,31 @@ namespace ams::dmnt {
Result ReadMemory(void *dst, uintptr_t address, size_t size);
Result WriteMemory(const void *src, uintptr_t address, size_t size);
Result Continue();
Result Continue(u64 thread_id);
Result Step();
Result Step(u64 thread_id);
void ClearStep();
Result Break();
Result SetBreakPoint(uintptr_t address, size_t size, bool is_step);
Result ClearBreakPoint(uintptr_t address, size_t size);
Result SetHardwareBreakPoint(uintptr_t address, size_t size, bool is_step);
Result ClearHardwareBreakPoint(uintptr_t address, size_t size);
Result SetWatchPoint(u64 address, u64 size, bool read, bool write);
Result ClearWatchPoint(u64 address, u64 size);
Result GetWatchPointInfo(u64 address, bool &read, bool &write);
static bool IsValidWatchPoint(u64 address, u64 size);
Result GetThreadCurrentCore(u32 *out, u64 thread_id);
Result GetProcessDebugEvent(svc::DebugEventInfo *out);
void GetBranchTarget(svc::ThreadContext &ctx, u64 thread_id, u64 &current_pc, u64 &target);
private:
Result Start();

515
stratosphere/dmnt.gen2/source/dmnt2_gdb_server_impl.cpp
View file

@ -20,6 +20,25 @@
namespace ams::dmnt {
namespace {
constexpr const u32 SdkBreakPoint = 0xE7FFFFFF;
constexpr const u32 SdkBreakPointMask = 0xFFFFFFFF;
constexpr const u32 ArmBreakPoint = 0xE7FFDEFE;
constexpr const u32 ArmBreakPointMask = 0xFFFFFFFF;
constexpr const u32 A64BreakPoint = 0xD4200000;
constexpr const u32 A64BreakPointMask = 0xFFE0001F;
constexpr const u32 A64Halt = 0xD4400000;
constexpr const u32 A64HaltMask = 0xFFE0001F;
constexpr const u32 A32BreakPoint = 0xE1200070;
constexpr const u32 A32BreakPointMask = 0xFFF000F0;
constexpr const u32 T16BreakPoint = 0x0000BE00;
constexpr const u32 T16BreakPointMask = 0x0000FF00;
constexpr const char TargetXmlAarch64[] =
"l<?xml version=\"1.0\"?>"
"<!DOCTYPE target SYSTEM \"gdb-target.dtd\">"
@ -349,6 +368,15 @@ namespace ams::dmnt {
AMS_DMNT2_GDB_LOG_DEBUG("Offset/Length %x/%x\n", offset, length);
}
s32 FindThreadIdIndex(u64 *thread_ids, s32 num_threads, u64 thread_id) {
for (auto i = 0; i < num_threads; ++i) {
if (thread_ids[i] == thread_id) {
return i;
}
}
return 0;
}
void SetGdbRegister32(char *dst, u32 value) {
if (value != 0) {
AppendReply(dst, "%08x", util::ConvertToBigEndian(value));
@ -570,10 +598,189 @@ namespace ams::dmnt {
}
/* Process the event. */
bool reply = false;
GdbSignal signal;
char send_buffer[GdbPacketBufferSize];
u64 thread_id = d.thread_id;
m_debug_process.ClearStep();
send_buffer[0] = 0;
switch (d.type) {
default:
AMS_DMNT2_GDB_LOG_DEBUG("Unhandled ProcessEvent %u\n", static_cast<u32>(d.type));
case svc::DebugEvent_Exception:
{
switch (d.info.exception.type) {
case svc::DebugException_BreakPoint:
{
signal = GdbSignal_BreakpointTrap;
const uintptr_t address = d.info.exception.address;
const bool is_instr = d.info.exception.specific.break_point.type == svc::BreakPointType_HardwareInstruction;
AMS_DMNT2_GDB_LOG_DEBUG("BreakPoint %lx, addr=%lx, type=%s\n", thread_id, address, is_instr ? "Instr" : "Data");
if (is_instr) {
SetReply(send_buffer, "T%02Xthread:p%lx.%lx;hwbreak:;", static_cast<u32>(signal), m_process_id.value, thread_id);
} else {
bool read = false, write = false;
const char *type = "watch";
if (R_SUCCEEDED(m_debug_process.GetWatchPointInfo(address, read, write))) {
if (read && write) {
type = "awatch";
} else if (read) {
type = "rwatch";
}
} else {
AMS_DMNT2_GDB_LOG_DEBUG("GetWatchPointInfo FAIL %lx, addr=%lx, type=%s\n", thread_id, address, is_instr ? "Instr" : "Data");
}
SetReply(send_buffer, "T%02Xthread:p%lx.%lx;%s:%lx;", static_cast<u32>(signal), m_process_id.value, thread_id, type, address);
}
reply = true;
}
break;
case svc::DebugException_DebuggerBreak:
{
AMS_DMNT2_GDB_LOG_DEBUG("DebuggerBreak %lx, last=%lx\n", thread_id, m_debug_process.GetLastThreadId());
signal = GdbSignal_Interrupt;
thread_id = m_debug_process.GetLastThreadId();
m_debug_process.SetLastThreadId(thread_id);
}
break;
case svc::DebugException_UndefinedInstruction:
{
signal = GdbSignal_IllegalInstruction;
uintptr_t address = d.info.exception.address;
const u32 insn = d.info.exception.specific.undefined_instruction.insn;
u32 new_insn = 0;
svc::ThreadContext ctx;
if (R_SUCCEEDED(m_debug_process.GetThreadContext(std::addressof(ctx), thread_id, svc::ThreadContextFlag_Control))) {
bool insn_changed = false;
if (ctx.pstate & 0x20) {
/* Thumb mode. */
address &= ~1;
if (R_SUCCEEDED(m_debug_process.ReadMemory(std::addressof(new_insn), address, 2))) {
switch ((new_insn >> 11) & 0x1F) {
case 0x1D:
case 0x1E:
case 0x1F:
{
if (R_SUCCEEDED(m_debug_process.ReadMemory(reinterpret_cast<u8 *>(std::addressof(new_insn)) + 2, address + 2, 2))) {
insn_changed = (new_insn != insn);
}
}
break;
default:
insn_changed = (new_insn != insn);
break;
}
if ((insn & T16BreakPointMask) == T16BreakPoint) {
signal = GdbSignal_BreakpointTrap;
}
}
} else {
/* Non-thumb. */
if (R_SUCCEEDED(m_debug_process.ReadMemory(std::addressof(new_insn), address, sizeof(new_insn)))) {
insn_changed = (new_insn != insn);
}
if (((insn & SdkBreakPointMask) == SdkBreakPoint) ||
((insn & ArmBreakPointMask) == ArmBreakPoint) ||
((insn & A64BreakPointMask) == A64BreakPoint) ||
((insn & A32BreakPointMask) == A32BreakPoint) ||
((insn & A64HaltMask) == A64Halt))
{
signal = GdbSignal_BreakpointTrap;
}
}
if (insn_changed) {
AMS_DMNT2_GDB_LOG_DEBUG("Instruction Changed %lx, address=%p, insn=%08x, new_insn=%08x\n", thread_id, reinterpret_cast<void *>(address), insn, new_insn);
}
}
if (signal == GdbSignal_IllegalInstruction) {
AMS_DMNT2_GDB_LOG_DEBUG("Undefined Instruction %lx, address=%p, insn=%08x\n", thread_id, reinterpret_cast<void *>(address), insn);
} else if (signal == GdbSignal_BreakpointTrap && ((insn & SdkBreakPointMask) != SdkBreakPoint)) {
AMS_DMNT2_GDB_LOG_DEBUG("Non-SDK BreakPoint %lx, address=%p, insn=%08x\n", thread_id, reinterpret_cast<void *>(address), insn);
}
if (signal == GdbSignal_BreakpointTrap) {
SetReply(send_buffer, "T%02Xthread:p%lx.%lx;swbreak:;", static_cast<u32>(signal), m_process_id.value, thread_id);
reply = true;
}
m_debug_process.ClearStep();
}
break;
default:
AMS_DMNT2_GDB_LOG_DEBUG("Unhandled Exception %u %lx\n", static_cast<u32>(d.info.exception.type), thread_id);
signal = GdbSignal_SegmentationFault;
break;
}
if (!reply) {
SetReply(send_buffer, "T%02Xthread:p%lx.%lx;", static_cast<u32>(signal), m_process_id.value, thread_id);
reply = true;
}
m_debug_process.SetLastThreadId(thread_id);
m_debug_process.SetLastSignal(signal);
}
break;
case svc::DebugEvent_CreateThread:
{
AMS_DMNT2_GDB_LOG_DEBUG("CreateThread %lx\n", thread_id);
if (m_debug_process.IsValid()) {
m_debug_process.Continue();
} else {
SetReply(send_buffer, "W00");
reply = true;
}
}
case svc::DebugEvent_ExitThread:
{
AMS_DMNT2_GDB_LOG_DEBUG("ExitThread %lx\n", thread_id);
if (m_debug_process.IsValid()) {
m_debug_process.Continue();
} else {
SetReply(send_buffer, "W00");
reply = true;
}
}
break;
case svc::DebugEvent_ExitProcess:
{
m_killed = true;
AMS_DMNT2_GDB_LOG_DEBUG("ExitProcess\n");
if (d.info.exit_process.reason == svc::ProcessExitReason_ExitProcess) {
SetReply(send_buffer, "W00");
} else {
SetReply(send_buffer, "X%02X", GdbSignal_Killed);
}
m_debug_process.Detach();
reply = true;
}
break;
default:
AMS_DMNT2_GDB_LOG_DEBUG("Unhandled ProcessEvent %u %lx\n", static_cast<u32>(d.type), thread_id);
m_debug_process.Continue();
break;
}
if (reply) {
bool do_break;
this->SendPacket(std::addressof(do_break), send_buffer);
if (do_break) {
m_debug_process.Break();
}
}
}
}
@ -658,6 +865,12 @@ namespace ams::dmnt {
case 'H':
this->H();
break;
case 'T':
this->T();
break;
case 'Z':
this->Z();
break;
case 'g':
if (!this->g()) {
m_killed = true;
@ -672,6 +885,9 @@ namespace ams::dmnt {
case 'q':
this->q();
break;
case 'z':
this->z();
break;
case '!':
SetReplyOk(m_reply_packet);
break;
@ -730,6 +946,106 @@ namespace ams::dmnt {
}
}
void GdbServerImpl::T() {
if (const char *dot = std::strchr(m_receive_packet, '.'); dot != nullptr) {
const u64 thread_id = DecodeHex(dot + 1);
svc::ThreadContext ctx;
if (R_SUCCEEDED(m_debug_process.GetThreadContext(std::addressof(ctx), thread_id, svc::ThreadContextFlag_Control))) {
SetReplyOk(m_reply_packet);
} else {
SetReply(m_reply_packet, "E01");
}
} else {
SetReplyError(m_reply_packet, "E01");
}
}
void GdbServerImpl::Z() {
/* Increment past the 'Z'. */
++m_receive_packet;
/* Decode the type. */
if (!('0' <= m_receive_packet[0] && m_receive_packet[0] <= '4') || m_receive_packet[1] != ',') {
SetReplyError(m_reply_packet, "E01");
return;
}
const auto type = m_receive_packet[0] - '0';
m_receive_packet += 2;
/* Decode the address/length. */
const char *comma = std::strchr(m_receive_packet, ',');
if (comma == nullptr) {
SetReplyError(m_reply_packet, "E01");
return;
}
/* Parse address/length. */
const u64 address = DecodeHex(m_receive_packet);
const u64 length = DecodeHex(comma + 1);
switch (type) {
case 0: /* SW */
{
if (length == 2 || length == 4) {
if (R_SUCCEEDED(m_debug_process.SetBreakPoint(address, length, false))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
}
break;
case 1: /* HW */
{
if (length == 2 || length == 4) {
if (R_SUCCEEDED(m_debug_process.SetHardwareBreakPoint(address, length, false))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
}
break;
case 2: /* Watch-W */
{
if (m_debug_process.IsValidWatchPoint(address, length)) {
if (R_SUCCEEDED(m_debug_process.SetWatchPoint(address, length, false, true))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
}
break;
case 3: /* Watch-R */
{
if (m_debug_process.IsValidWatchPoint(address, length)) {
if (R_SUCCEEDED(m_debug_process.SetWatchPoint(address, length, true, false))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
}
break;
case 4: /* Watch-A */
{
if (m_debug_process.IsValidWatchPoint(address, length)) {
if (R_SUCCEEDED(m_debug_process.SetWatchPoint(address, length, true, true))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
}
break;
default:
break;
}
}
bool GdbServerImpl::g() {
/* Get thread id. */
u64 thread_id = m_debug_process.GetThreadIdOverride();
@ -781,6 +1097,8 @@ namespace ams::dmnt {
void GdbServerImpl::v() {
if (ParsePrefix(m_receive_packet, "vAttach;")) {
this->vAttach();
} else if (ParsePrefix(m_receive_packet, "vCont")) {
this->vCont();
} else {
AMS_DMNT2_GDB_LOG_DEBUG("Not Implemented v: %s\n", m_receive_packet);
}
@ -817,6 +1135,140 @@ namespace ams::dmnt {
}
}
void GdbServerImpl::vCont() {
/* Check if this is a query about what we support. */
if (ParsePrefix(m_receive_packet, "?")) {
SetReply(m_reply_packet, "vCont;c;C;s;S;");
return;
}
/* We want to parse semicolon separated fields repeatedly. */
char *saved;
char *token = strtok_r(m_receive_packet, ";", std::addressof(saved));
/* Validate the initial token. */
if (token == nullptr) {
return;
}
/* Prepare to parse threads. */
u64 thread_ids[DebugProcess::ThreadCountMax] = {};
u8 continue_modes[DebugProcess::ThreadCountMax] = {};
s32 num_threads;
if (R_FAILED(m_debug_process.GetThreadList(std::addressof(num_threads), thread_ids, util::size(thread_ids)))) {
AMS_DMNT2_GDB_LOG_ERROR("vCont: Failed to get thread list\n");
SetReplyError(m_reply_packet, "E01");
return;
}
/* Handle each token. */
Result result = ResultSuccess();
DebugProcess::ContinueMode default_continue_mode = DebugProcess::ContinueMode_Stopped;
while (token != nullptr && R_SUCCEEDED(result)) {
result = this->ParseVCont(token, thread_ids, continue_modes, num_threads, default_continue_mode);
token = strtok_r(nullptr, ";", std::addressof(saved));
}
AMS_DMNT2_GDB_LOG_DEBUG("vCont: NumThreads=%d, Default Continue Mode=%d\n", num_threads, static_cast<int>(default_continue_mode));
/* Act on all threads. */
s64 thread_id = -1;
for (auto i = 0; i < num_threads; ++i) {
if (continue_modes[i] == DebugProcess::ContinueMode_Step || (continue_modes[i] == DebugProcess::ContinueMode_Stopped && default_continue_mode == DebugProcess::ContinueMode_Step)) {
thread_id = thread_ids[i];
result = m_debug_process.Step(thread_ids[i]);
}
}
/* Continue the last thread. */
if (static_cast<u64>(thread_id) == m_debug_process.GetLastThreadId() && default_continue_mode != DebugProcess::ContinueMode_Continue) {
result = m_debug_process.Continue(thread_id);
} else {
result = m_debug_process.Continue();
}
/* Set reply. */
if (R_SUCCEEDED(result)) {
SetReplyOk(m_reply_packet);
} else {
AMS_DMNT2_GDB_LOG_ERROR("vCont: Failed %08x\n", result.GetValue());
SetReplyError(m_reply_packet, "E01");
}
}
Result GdbServerImpl::ParseVCont(char * const token, u64 *thread_ids, u8 *continue_modes, s32 num_threads, DebugProcess::ContinueMode &default_continue_mode) {
/* Parse the thread id. */
s64 thread_id = -1;
s32 signal = -1;
s32 thread_ix = -1;
if (token[0] && token[1]) {
if (char *colon = std::strchr(token, ':'); colon != nullptr) {
*colon = 0;
if (char *dot = std::strchr(colon + 1, '.'); dot != nullptr) {
*dot = 0;
thread_id = std::strcmp(dot + 1, "-1") == 0 ? -1 : static_cast<s64>(DecodeHex(dot + 1));
thread_ix = FindThreadIdIndex(thread_ids, num_threads, static_cast<u64>(thread_id));
}
}
}
/* Check that we don't already have a default mode. */
if (thread_id == -1 && default_continue_mode != DebugProcess::ContinueMode_Stopped) {
AMS_DMNT2_GDB_LOG_ERROR("vCont: Too many defaults specified\n");
}
/* Handle the action. */
switch (token[0]) {
case 'c':
if (thread_id > 0) {
AMS_DMNT2_GDB_LOG_DEBUG("vCont: Continue %lx\n", static_cast<u64>(thread_id));
continue_modes[thread_ix] = DebugProcess::ContinueMode_Continue;
} else {
default_continue_mode = DebugProcess::ContinueMode_Continue;
}
break;
case 'C':
if (token[1]) {
signal = std::strcmp(token + 1, "-1") == 0 ? -1 : static_cast<s32>(DecodeHex(token + 1));
}
AMS_DMNT2_GDB_LOG_WARN("vCont: Ignoring C, signal=%d\n", signal);
if (thread_id > 0) {
AMS_DMNT2_GDB_LOG_DEBUG("vCont: Continue %lx, signal=%d\n", static_cast<u64>(thread_id), signal);
continue_modes[thread_ix] = DebugProcess::ContinueMode_Continue;
} else {
default_continue_mode = DebugProcess::ContinueMode_Continue;
}
break;
case 's':
if (thread_id > 0) {
AMS_DMNT2_GDB_LOG_DEBUG("vCont: Step %lx\n", static_cast<u64>(thread_id));
continue_modes[thread_ix] = DebugProcess::ContinueMode_Step;
} else {
default_continue_mode = DebugProcess::ContinueMode_Step;
}
break;
case 'S':
if (token[1]) {
signal = std::strcmp(token + 1, "-1") == 0 ? -1 : static_cast<s32>(DecodeHex(token + 1));
}
AMS_DMNT2_GDB_LOG_WARN("vCont: Ignoring S, signal=%d\n", signal);
if (thread_id > 0) {
AMS_DMNT2_GDB_LOG_DEBUG("vCont: Step %lx, signal=%d\n", static_cast<u64>(thread_id), signal);
continue_modes[thread_ix] = DebugProcess::ContinueMode_Step;
} else {
default_continue_mode = DebugProcess::ContinueMode_Step;
}
break;
default:
AMS_DMNT2_GDB_LOG_WARN("vCont: Ignoring %c\n", token[0]);
break;
}
return ResultSuccess();
}
void GdbServerImpl::q() {
if (ParsePrefix(m_receive_packet, "qAttached:")) {
this->qAttached();
@ -1081,6 +1533,65 @@ namespace ams::dmnt {
return true;
}
void GdbServerImpl::z() {
/* Increment past the 'z'. */
++m_receive_packet;
/* Decode the type. */
if (!('0' <= m_receive_packet[0] && m_receive_packet[0] <= '4') || m_receive_packet[1] != ',') {
SetReplyError(m_reply_packet, "E01");
return;
}
const auto type = m_receive_packet[0] - '0';
m_receive_packet += 2;
/* Decode the address/length. */
const char *comma = std::strchr(m_receive_packet, ',');
if (comma == nullptr) {
SetReplyError(m_reply_packet, "E01");
return;
}
/* Parse address/length. */
const u64 address = DecodeHex(m_receive_packet);
const u64 length = DecodeHex(comma + 1);
switch (type) {
case 0: /* SW */
{
if (R_SUCCEEDED(m_debug_process.ClearBreakPoint(address, length))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
break;
case 1: /* HW */
{
if (R_SUCCEEDED(m_debug_process.ClearHardwareBreakPoint(address, length))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
break;
case 2: /* Watch-W */
case 3: /* Watch-R */
case 4: /* Watch-A */
{
if (R_SUCCEEDED(m_debug_process.ClearWatchPoint(address, length))) {
SetReplyOk(m_reply_packet);
} else {
SetReplyError(m_reply_packet, "E01");
}
}
break;
default:
break;
}
}
void GdbServerImpl::QuestionMark() {
if (m_debug_process.IsValid()) {
if (m_debug_process.GetLastThreadId() == 0) {

9
stratosphere/dmnt.gen2/source/dmnt2_gdb_server_impl.hpp
View file

@ -65,6 +65,10 @@ namespace ams::dmnt {
void H();
void Hg();
void T();
void Z();
bool g();
void m();
@ -72,6 +76,7 @@ namespace ams::dmnt {
void v();
void vAttach();
void vCont();
void q();
@ -84,7 +89,11 @@ namespace ams::dmnt {
void qXferOsdataRead();
bool qXferThreadsRead();
void z();
void QuestionMark();
private:
Result ParseVCont(char * const token, u64 *thread_ids, u8 *continue_modes, s32 num_threads, DebugProcess::ContinueMode &default_continue_mode);
};
}

235
stratosphere/dmnt.gen2/source/dmnt2_hardware_breakpoint.cpp Normal file
View file

@ -0,0 +1,235 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "dmnt2_hardware_breakpoint.hpp"
#include "dmnt2_debug_process.hpp"
#include "dmnt2_debug_log.hpp"
namespace ams::dmnt {
namespace {
constinit auto g_last_bp_register = -1;
constinit auto g_first_bp_ctx_register = -1;
constinit auto g_last_bp_ctx_register = -1;
constinit auto g_last_wp_register = -1;
constinit os::SdkMutex g_multicore_lock;
constinit bool g_multicore_started = false;
alignas(os::ThreadStackAlignment) constinit u8 g_multicore_thread_stack[16_KB];
constinit os::ThreadType g_multicore_thread;
constinit os::MessageQueueType g_multicore_request_queue;
constinit os::MessageQueueType g_multicore_response_queue;
constinit uintptr_t g_multicore_request_storage[2];
constinit uintptr_t g_multicore_response_storage[2];
void MultiCoreThread(void *) {
/* Get thread core mask. */
s32 cur_core;
u64 core_mask;
R_ABORT_UNLESS(svc::GetThreadCoreMask(std::addressof(cur_core), std::addressof(core_mask), svc::PseudoHandle::CurrentThread));
/* Service requests. */
while (true) {
/* Wait for a request to come in. */
uintptr_t request_v;
os::ReceiveMessageQueue(std::addressof(request_v), std::addressof(g_multicore_request_queue));
/* Process the request. */
const uintptr_t *request = reinterpret_cast<const uintptr_t *>(request_v);
bool success = true;
if (request[0] == 1) {
/* Set on each core. */
for (s32 core = 0; core < 4; ++core) {
/* Switch to the desired core. */
R_ABORT_UNLESS(svc::SetThreadCoreMask(svc::PseudoHandle::CurrentThread, core, (1 << core)));
/* Get the core mask. */
R_ABORT_UNLESS(svc::GetThreadCoreMask(std::addressof(cur_core), std::addressof(core_mask), svc::PseudoHandle::CurrentThread));
/* Set the breakpoint. */
const Result result = svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(request[1]), request[2], request[3]);
if (R_FAILED(result)) {
success = false;
AMS_DMNT2_GDB_LOG_ERROR("SetHardwareBreakPoint FAIL 0x%08x, core=%d, reg=%lu, ctrl=%lx, val=%lx\n", result.GetValue(), core, request[1], request[2], request[3]);
break;
}
}
}
os::SendMessageQueue(std::addressof(g_multicore_response_queue), static_cast<uintptr_t>(success));
}
}
void EnsureMultiCoreStarted() {
std::scoped_lock lk(g_multicore_lock);
if (!g_multicore_started) {
os::InitializeMessageQueue(std::addressof(g_multicore_request_queue), g_multicore_request_storage, util::size(g_multicore_request_storage));
os::InitializeMessageQueue(std::addressof(g_multicore_response_queue), g_multicore_response_storage, util::size(g_multicore_response_storage));
R_ABORT_UNLESS(os::CreateThread(std::addressof(g_multicore_thread), MultiCoreThread, nullptr, g_multicore_thread_stack, sizeof(g_multicore_thread_stack), os::HighestThreadPriority - 1));
os::StartThread(std::addressof(g_multicore_thread));
g_multicore_started = true;
}
}
}
Result HardwareBreakPoint::Clear(DebugProcess *debug_process) {
Result result = svc::ResultInvalidArgument();
if (m_in_use) {
AMS_DMNT2_GDB_LOG_DEBUG("HardwareBreakPoint::Clear %p 0x%lx\n", this, m_address);
result = HardwareBreakPointManager::SetExecutionBreakPoint(m_reg, m_ctx, 0);
this->Reset();
}
return result;
}
Result HardwareBreakPoint::Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool is_step) {
/* Set fields. */
m_is_step = is_step;
m_address = address;
m_size = size;
/* Set context breakpoint. */
R_TRY(HardwareBreakPointManager::SetContextBreakPoint(m_ctx, debug_process));
/* Set execution breakpoint. */
R_TRY(HardwareBreakPointManager::SetExecutionBreakPoint(m_reg, m_ctx, address));
/* Set as in-use. */
m_in_use = true;
return ResultSuccess();
}
HardwareBreakPointManager::HardwareBreakPointManager(DebugProcess *debug_process) : BreakPointManager(debug_process) {
/* Determine the number of breakpoint registers. */
CountBreakPointRegisters();
/* Initialize all breakpoints. */
for (size_t i = 0; i < util::size(m_breakpoints); ++i) {
m_breakpoints[i].Initialize(static_cast<svc::HardwareBreakPointRegisterName>(svc::HardwareBreakPointRegisterName_I0 + i), static_cast<svc::HardwareBreakPointRegisterName>(g_first_bp_ctx_register));
}
}
BreakPointBase *HardwareBreakPointManager::GetBreakPoint(size_t index) {
if (index < util::size(m_breakpoints)) {
return m_breakpoints + index;
} else {
return nullptr;
}
}
Result HardwareBreakPointManager::SetHardwareBreakPoint(u32 r, u64 dbgbcr, u64 value) {
/* Send request. */
const uintptr_t request[4] = {
1,
r,
dbgbcr,
value
};
R_UNLESS(SendMultiCoreRequest(request), dmnt::ResultUnknown());
return ResultSuccess();
}
Result HardwareBreakPointManager::SetContextBreakPoint(svc::HardwareBreakPointRegisterName ctx, DebugProcess *debug_process) {
/* Encode the register. */
const u64 dbgbcr = (0x3 << 20) | (0 << 16) | (0xF << 5) | 1;
const Result result = SetHardwareBreakPoint(ctx, dbgbcr, debug_process->GetHandle());
if (R_FAILED(result)) {
AMS_DMNT2_GDB_LOG_ERROR("SetContextBreakPoint FAIL 0x%08x ctx=%d\n", result.GetValue(), ctx);
}
return result;
}
svc::HardwareBreakPointRegisterName HardwareBreakPointManager::GetWatchPointContextRegister() {
CountBreakPointRegisters();
return static_cast<svc::HardwareBreakPointRegisterName>(g_first_bp_ctx_register + 1);
}
Result HardwareBreakPointManager::SetExecutionBreakPoint(svc::HardwareBreakPointRegisterName reg, svc::HardwareBreakPointRegisterName ctx, u64 address) {
/* Encode the register. */
const u64 dbgbcr = (0x1 << 20) | (ctx << 16) | (0xF << 5) | ((address != 0) ? 1 : 0);
const Result result = SetHardwareBreakPoint(reg, dbgbcr, address);
if (R_FAILED(result)) {
AMS_DMNT2_GDB_LOG_ERROR("SetContextBreakPoint FAIL 0x%08x reg=%d, ctx=%d, address=%lx\n", result.GetValue(), reg, ctx, address);
}
return result;
}
void HardwareBreakPointManager::CountBreakPointRegisters() {
/* Determine the valid breakpoint extents. */
if (g_last_bp_ctx_register == -1) {
/* Keep setting until we see a failure. */
for (int i = svc::HardwareBreakPointRegisterName_I0; i <= static_cast<int>(svc::HardwareBreakPointRegisterName_I15); ++i) {
if (R_FAILED(svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), 0, 0))) {
break;
}
g_last_bp_register = i;
}
AMS_DMNT2_GDB_LOG_DEBUG("Last valid breakpoint=%d\n", g_last_bp_register);
/* Determine the context register range. */
const u64 dbgbcr = (0x3 << 20) | (0x0 << 16) | (0xF << 5) | 1;
g_last_bp_ctx_register = g_last_bp_register;
for (int i = g_last_bp_ctx_register; i >= static_cast<int>(svc::HardwareBreakPointRegisterName_I0); --i) {
const Result result = svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), dbgbcr, svc::PseudoHandle::CurrentProcess);
svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), 0, 0);
if (R_FAILED(result)) {
if (!svc::ResultInvalidHandle::Includes(result)) {
break;
}
}
g_first_bp_ctx_register = i;
}
AMS_DMNT2_GDB_LOG_DEBUG("Context BreakPoints = %d-%d\n", g_first_bp_ctx_register, g_last_bp_ctx_register);
/* Determine valid watchpoint registers. */
for (int i = svc::HardwareBreakPointRegisterName_D0; i <= static_cast<int>(svc::HardwareBreakPointRegisterName_D15); ++i) {
if (R_FAILED(svc::SetHardwareBreakPoint(static_cast<svc::HardwareBreakPointRegisterName>(i), 0, 0))) {
break;
}
g_last_wp_register = i - svc::HardwareBreakPointRegisterName_D0;
}
AMS_DMNT2_GDB_LOG_DEBUG("Last valid watchpoint=%d\n", g_last_wp_register);
}
}
bool HardwareBreakPointManager::SendMultiCoreRequest(const void *request) {
/* Ensure the multi core thread is active. */
EnsureMultiCoreStarted();
/* Send the request. */
os::SendMessageQueue(std::addressof(g_multicore_request_queue), reinterpret_cast<uintptr_t>(request));
/* Get the response. */
uintptr_t response;
os::ReceiveMessageQueue(std::addressof(response), std::addressof(g_multicore_response_queue));
return static_cast<bool>(response);
}
}

55
stratosphere/dmnt.gen2/source/dmnt2_hardware_breakpoint.hpp Normal file
View file

@ -0,0 +1,55 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#include "dmnt2_breakpoint_manager.hpp"
namespace ams::dmnt {
struct HardwareBreakPoint : public BreakPoint {
svc::HardwareBreakPointRegisterName m_reg;
svc::HardwareBreakPointRegisterName m_ctx;
void Initialize(svc::HardwareBreakPointRegisterName r, svc::HardwareBreakPointRegisterName c) {
m_reg = r;
m_ctx = c;
}
virtual Result Clear(DebugProcess *debug_process) override;
virtual Result Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool is_step) override;
};
class HardwareBreakPointManager : public BreakPointManager {
public:
static constexpr size_t BreakPointCountMax = 0x10;
private:
HardwareBreakPoint m_breakpoints[BreakPointCountMax];
public:
static Result SetHardwareBreakPoint(u32 r, u64 dbgbcr, u64 value);
static Result SetContextBreakPoint(svc::HardwareBreakPointRegisterName ctx, DebugProcess *debug_process);
static svc::HardwareBreakPointRegisterName GetWatchPointContextRegister();
static Result SetExecutionBreakPoint(svc::HardwareBreakPointRegisterName reg, svc::HardwareBreakPointRegisterName ctx, u64 address);
public:
explicit HardwareBreakPointManager(DebugProcess *debug_process);
private:
virtual BreakPointBase *GetBreakPoint(size_t index) override;
private:
static void CountBreakPointRegisters();
static bool SendMultiCoreRequest(const void *request);
};
}

167
stratosphere/dmnt.gen2/source/dmnt2_hardware_watchpoint.cpp Normal file
View file

@ -0,0 +1,167 @@
/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "dmnt2_hardware_watchpoint.hpp"
#include "dmnt2_hardware_breakpoint.hpp"
#include "dmnt2_debug_process.hpp"
#include "dmnt2_debug_log.hpp"
namespace ams::dmnt {
namespace {
Result SetDataBreakPoint(svc::HardwareBreakPointRegisterName reg, svc::HardwareBreakPointRegisterName ctx, u64 address, u64 size, bool read, bool write) {
/* Determine lsc. */
const u8 lsc = (read ? 1 : 0) | (write ? 2 : 0);
/* Check that the watchpoint is valid. */
if (lsc != 0) {
R_UNLESS(HardwareWatchPointManager::IsValidWatchPoint(address, size), svc::ResultInvalidArgument());
}
/* Determine bas/mask. */
u8 bas = 0, mask = 0;
if (size <= 8) {
bas = ((1 << size) - 1) << (address & 7);
address = util::AlignDown(address, 8);
} else {
bas = 0xFF;
mask = util::PopCount(size - 1);
}
/* Build dbgbcr value. */
const u64 dbgbcr = (mask << 24) | (ctx << 16) | (bas << 5) | (lsc << 3) | ((lsc != 0) ? 1 : 0);
/* Set the breakpoint. */
const Result result = HardwareBreakPointManager::SetHardwareBreakPoint(reg, dbgbcr, address);
if (R_FAILED(result)) {
AMS_DMNT2_GDB_LOG_ERROR("SetDataBreakPoint FAIL 0x%08x, reg=%d, address=0x%lx\n", result.GetValue(), reg, address);
}
return result;
}
}
bool HardwareWatchPointManager::IsValidWatchPoint(u64 address, u64 size) {
/* Check size. */
if (size == 0) {
AMS_DMNT2_GDB_LOG_ERROR("HardwareWatchPointManager::IsValidWatchPoint(%lx, %lx) FAIL size == 0\n", address, size);
return false;
}
/* Validate. */
if (size <= 8) {
/* Check that address is aligned. */
if (util::AlignDown(address, 8) != util::AlignDown(address + size - 1, 8)) {
AMS_DMNT2_GDB_LOG_ERROR("HardwareWatchPointManager::IsValidWatchPoint(%lx, %lx) FAIL range crosses qword boundary\n", address, size);
return false;
}
} else {
/* Check size is small enough. */
if (size > 0x80000000) {
AMS_DMNT2_GDB_LOG_ERROR("HardwareWatchPointManager::IsValidWatchPoint(%lx, %lx) FAIL size too big\n", address, size);
return false;
}
/* Check size is power of two. */
if (!util::IsPowerOfTwo(size)) {
AMS_DMNT2_GDB_LOG_ERROR("HardwareWatchPointManager::IsValidWatchPoint(%lx, %lx) FAIL size not power of two\n", address, size);
return false;
}
/* Check alignment. */
if (!util::IsAligned(address, size)) {
AMS_DMNT2_GDB_LOG_ERROR("HardwareWatchPointManager::IsValidWatchPoint(%lx, %lx) FAIL address not size-aligned\n", address, size);
return false;
}
}
return true;
}
Result WatchPoint::Clear(DebugProcess *debug_process) {
Result result = svc::ResultInvalidArgument();
if (m_in_use) {
AMS_DMNT2_GDB_LOG_DEBUG("WatchPoint::Clear %p 0x%lx\n", this, m_address);
result = SetDataBreakPoint(m_reg, m_ctx, 0, 0, false, false);
this->Reset();
}
return result;
}
Result WatchPoint::Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool read, bool write) {
/* Set fields. */
m_address = address;
m_size = size;
m_read = read;
m_write = write;
/* Set context breakpoint. */
R_TRY(HardwareBreakPointManager::SetContextBreakPoint(m_ctx, debug_process));
/* Set watchpoint. */
R_TRY(SetDataBreakPoint(m_reg, m_ctx, address, size, read, write));
/* Set as in-use. */
m_in_use = true;
return ResultSuccess();
}
HardwareWatchPointManager::HardwareWatchPointManager(DebugProcess *debug_process) : BreakPointManagerBase(debug_process) {
const svc::HardwareBreakPointRegisterName ctx = HardwareBreakPointManager::GetWatchPointContextRegister();
for (size_t i = 0; i < util::size(m_breakpoints); ++i) {
m_breakpoints[i].Initialize(static_cast<svc::HardwareBreakPointRegisterName>(svc::HardwareBreakPointRegisterName_D0 + i), ctx);
}
}
BreakPointBase *HardwareWatchPointManager::GetBreakPoint(size_t index) {
if (index < util::size(m_breakpoints)) {
return m_breakpoints + index;
} else {
return nullptr;
}
}
Result HardwareWatchPointManager::SetWatchPoint(u64 address, u64 size, bool read, bool write) {
/* Get a free watchpoint. */
auto *bp = static_cast<WatchPoint *>(this->GetFreeBreakPoint());
R_UNLESS(bp != nullptr, svc::ResultOutOfHandles());
/* Set the watchpoint. */
return bp->Set(m_debug_process, address, size, read, write);
}
Result HardwareWatchPointManager::GetWatchPointInfo(u64 address, bool &read, bool &write) {
/* Find a matching watchpoint. */
for (const auto &bp : m_breakpoints) {
if (bp.m_in_use) {
if (bp.m_address <= address && address < bp.m_address + bp.m_size) {
read = bp.m_read;
write = bp.m_write;
return ResultSuccess();
}
}
}
/* Otherwise, we failed. */
AMS_DMNT2_GDB_LOG_ERROR("HardwareWatchPointManager::GetWatchPointInfo FAIL 0x%lx\n", address);
read = false;
write = false;
return svc::ResultInvalidArgument();
}
}

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#include "dmnt2_breakpoint_manager_base.hpp"
namespace ams::dmnt {
struct WatchPoint : public BreakPointBase {
svc::HardwareBreakPointRegisterName m_reg;
svc::HardwareBreakPointRegisterName m_ctx;
bool m_read;
bool m_write;
void Initialize(svc::HardwareBreakPointRegisterName r, svc::HardwareBreakPointRegisterName c) {
m_reg = r;
m_ctx = c;
}
virtual Result Clear(DebugProcess *debug_process) override;
Result Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool read, bool write);
};
class HardwareWatchPointManager : public BreakPointManagerBase {
public:
static constexpr size_t BreakPointCountMax = 0x10;
private:
WatchPoint m_breakpoints[BreakPointCountMax];
public:
static bool IsValidWatchPoint(u64 address, u64 size);
public:
explicit HardwareWatchPointManager(DebugProcess *debug_process);
Result SetWatchPoint(u64 address, u64 size, bool read, bool write);
Result GetWatchPointInfo(u64 address, bool &read, bool &write);
private:
virtual BreakPointBase *GetBreakPoint(size_t index) override;
};
}

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "dmnt2_software_breakpoint.hpp"
#include "dmnt2_debug_process.hpp"
#include "dmnt2_debug_log.hpp"
namespace ams::dmnt {
namespace {
constexpr const u8 Aarch64BreakInstruction[] = {0xFF, 0xFF, 0xFF, 0xE7};
constexpr const u8 Aarch32BreakInstruction[] = {0xFE, 0xDE, 0xFF, 0xE7};
constexpr const u8 Aarch32ThumbBreakInstruction[] = {0x80, 0xB6};
}
Result SoftwareBreakPoint::Clear(DebugProcess *debug_process) {
Result result = svc::ResultInvalidArgument();
if (m_in_use) {
if (m_address) {
result = debug_process->WriteMemory(std::addressof(m_insn), m_address, m_size);
if (R_SUCCEEDED(result)) {
AMS_DMNT2_GDB_LOG_DEBUG("SoftwareBreakPoint::Clear %p 0x%lx, insn=0x%x\n", this, m_address, m_insn);
} else {
AMS_DMNT2_GDB_LOG_DEBUG("SoftwareBreakPoint::Clear %p 0x%lx, insn=0x%x, !!! Fail %08x !!!\n", this, m_address, m_insn, result.GetValue());
}
this->Reset();
} else {
AMS_DMNT2_GDB_LOG_ERROR("SoftwareBreakPoint::Clear %p 0x%lx, insn=0x%x, !!! Null Address !!!\n", this, m_address, m_insn);
}
}
return result;
}
Result SoftwareBreakPoint::Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool is_step) {
/* Set fields. */
m_is_step = is_step;
m_address = address;
m_size = size;
/* Read our instruction. */
Result result = debug_process->ReadMemory(std::addressof(m_insn), m_address, m_size);
AMS_DMNT2_GDB_LOG_DEBUG("SoftwareBreakPoint::Set %p 0x%lx, insn=0x%x\n", this, m_address, m_insn);
/* Set the breakpoint. */
if (debug_process->Is64Bit()) {
if (m_size == sizeof(Aarch64BreakInstruction)) {
result = debug_process->WriteMemory(Aarch64BreakInstruction, m_address, m_size);
} else {
result = svc::ResultInvalidArgument();
}
} else {
if (m_size == sizeof(Aarch32BreakInstruction) || m_size == sizeof(Aarch32ThumbBreakInstruction)) {
result = debug_process->WriteMemory(m_size == sizeof(Aarch32BreakInstruction) ? Aarch32BreakInstruction : Aarch32ThumbBreakInstruction, m_address, m_size);
} else {
result = svc::ResultInvalidArgument();
}
}
/* Check that we succeeded. */
if (R_SUCCEEDED(result)) {
m_in_use = true;
}
return result;
}
SoftwareBreakPointManager::SoftwareBreakPointManager(DebugProcess *debug_process) : BreakPointManager(debug_process) {
/* ... */
}
BreakPointBase *SoftwareBreakPointManager::GetBreakPoint(size_t index) {
if (index < util::size(m_breakpoints)) {
return m_breakpoints + index;
} else {
return nullptr;
}
}
}

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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stratosphere.hpp>
#include "dmnt2_breakpoint_manager.hpp"
namespace ams::dmnt {
struct SoftwareBreakPoint : public BreakPoint {
u32 m_insn;
virtual Result Clear(DebugProcess *debug_process) override;
virtual Result Set(DebugProcess *debug_process, uintptr_t address, size_t size, bool is_step) override;
};
class SoftwareBreakPointManager : public BreakPointManager {
public:
static constexpr size_t BreakPointCountMax = 0x80;
private:
SoftwareBreakPoint m_breakpoints[BreakPointCountMax];
public:
explicit SoftwareBreakPointManager(DebugProcess *debug_process);
private:
virtual BreakPointBase *GetBreakPoint(size_t index) override;
};
}