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Atmosphere/libraries/libmesosphere/source/svc/kern_svc_debug.cpp
SciresM 96f95b9f95
Integrate new result macros. (#1780)
* result: try out some experimental shenanigans

* result: sketch out some more shenanigans

* result: see what it looks like to convert kernel to use result conds instead of guards

* make rest of kernel use experimental new macro-ing
2022-02-14 14:45:32 -08:00

532 lines
24 KiB
C++

/*
* Copyright (c) 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 <mesosphere.hpp>
namespace ams::kern::svc {
/* ============================= Common ============================= */
namespace {
constexpr inline int32_t MaximumDebuggableThreadCount = 0x60;
Result DebugActiveProcess(ams::svc::Handle *out_handle, uint64_t process_id) {
/* Get the process from its id. */
KProcess *process = KProcess::GetProcessFromId(process_id);
R_UNLESS(process != nullptr, svc::ResultInvalidProcessId());
/* Close the reference we opened to the process on scope exit. */
ON_SCOPE_EXIT { process->Close(); };
/* Check that the debugging is allowed. */
if (!process->IsPermittedDebug()) {
R_UNLESS(GetCurrentProcess().CanForceDebug(), svc::ResultInvalidState());
}
/* Disallow debugging one's own processs, to prevent softlocks. */
R_UNLESS(process != GetCurrentProcessPointer(), svc::ResultInvalidState());
/* Get the current handle table. */
auto &handle_table = GetCurrentProcess().GetHandleTable();
/* Create a new debug object. */
KDebug *debug = KDebug::Create();
R_UNLESS(debug != nullptr, svc::ResultOutOfResource());
ON_SCOPE_EXIT { debug->Close(); };
/* Initialize the debug object. */
debug->Initialize();
/* Register the debug object. */
KDebug::Register(debug);
/* Try to attach to the target process. */
R_TRY(debug->Attach(process));
/* Add the new debug object to the handle table. */
R_TRY(handle_table.Add(out_handle, debug));
R_SUCCEED();
}
Result BreakDebugProcess(ams::svc::Handle debug_handle) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Break the process. */
R_TRY(debug->BreakProcess());
R_SUCCEED();
}
Result TerminateDebugProcess(ams::svc::Handle debug_handle) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Terminate the process. */
R_TRY(debug->TerminateProcess());
R_SUCCEED();
}
template<typename EventInfoType>
Result GetDebugEvent(KUserPointer<EventInfoType *> out_info, ams::svc::Handle debug_handle) {
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Create and clear a new event info. */
EventInfoType info;
std::memset(std::addressof(info), 0, sizeof(info));
/* Get the next info from the debug object. */
R_TRY(debug->GetDebugEventInfo(std::addressof(info)));
/* Copy the info out to the user. */
R_TRY(out_info.CopyFrom(std::addressof(info)));
R_SUCCEED();
}
Result ContinueDebugEventImpl(ams::svc::Handle debug_handle, uint32_t flags, const uint64_t *thread_ids, int32_t num_thread_ids) {
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Continue the event. */
R_TRY(debug->ContinueDebug(flags, thread_ids, num_thread_ids));
R_SUCCEED();
}
Result ContinueDebugEvent(ams::svc::Handle debug_handle, uint32_t flags, KUserPointer<const uint64_t *> user_thread_ids, int32_t num_thread_ids) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Verify that the flags are valid. */
R_UNLESS((flags | ams::svc::ContinueFlag_AllMask) == ams::svc::ContinueFlag_AllMask, svc::ResultInvalidEnumValue());
/* Verify that continue all and continue others flags are exclusive. */
constexpr u32 AllAndOthersMask = ams::svc::ContinueFlag_ContinueAll | ams::svc::ContinueFlag_ContinueOthers;
R_UNLESS((flags & AllAndOthersMask) != AllAndOthersMask, svc::ResultInvalidEnumValue());
/* Verify that the number of thread ids is valid. */
R_UNLESS((0 <= num_thread_ids && num_thread_ids <= MaximumDebuggableThreadCount), svc::ResultOutOfRange());
/* Copy the threads from userspace. */
uint64_t thread_ids[MaximumDebuggableThreadCount];
if (num_thread_ids > 0) {
R_TRY(user_thread_ids.CopyArrayTo(thread_ids, num_thread_ids));
}
/* Continue the event. */
R_TRY(ContinueDebugEventImpl(debug_handle, flags, thread_ids, num_thread_ids));
R_SUCCEED();
}
Result LegacyContinueDebugEvent(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Verify that the flags are valid. */
R_UNLESS((flags | ams::svc::ContinueFlag_AllMask) == ams::svc::ContinueFlag_AllMask, svc::ResultInvalidEnumValue());
/* Verify that continue all and continue others flags are exclusive. */
constexpr u32 AllAndOthersMask = ams::svc::ContinueFlag_ContinueAll | ams::svc::ContinueFlag_ContinueOthers;
R_UNLESS((flags & AllAndOthersMask) != AllAndOthersMask, svc::ResultInvalidEnumValue());
/* Continue the event. */
R_TRY(ContinueDebugEventImpl(debug_handle, flags, std::addressof(thread_id), 1));
R_SUCCEED();
}
Result GetDebugThreadContext(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {
/* Validate the context flags. */
R_UNLESS((context_flags | ams::svc::ThreadContextFlag_All) == ams::svc::ThreadContextFlag_All, svc::ResultInvalidEnumValue());
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Get the thread context. */
ams::svc::ThreadContext context = {};
R_TRY(debug->GetThreadContext(std::addressof(context), thread_id, context_flags));
/* Copy the context to userspace. */
R_TRY(out_context.CopyFrom(std::addressof(context)));
R_SUCCEED();
}
Result SetDebugThreadContext(ams::svc::Handle debug_handle, uint64_t thread_id, KUserPointer<const ams::svc::ThreadContext *> user_context, uint32_t context_flags) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Validate the context flags. */
#if defined(MESOSPHERE_ENABLE_HARDWARE_SINGLE_STEP)
{
/* Check that the flags are a subset of the allowable. */
constexpr u32 AllFlagsMask = ams::svc::ThreadContextFlag_All | ams::svc::ThreadContextFlag_SetSingleStep | ams::svc::ThreadContextFlag_ClearSingleStep;
R_UNLESS((context_flags | AllFlagsMask) == AllFlagsMask, svc::ResultInvalidEnumValue());
/* Check that thread isn't both setting and clearing single step. */
const bool set_ss = (context_flags & ams::svc::ThreadContextFlag_SetSingleStep) != 0;
const bool clear_ss = (context_flags & ams::svc::ThreadContextFlag_ClearSingleStep) != 0;
R_UNLESS(!(set_ss && clear_ss), svc::ResultInvalidEnumValue());
}
#else
{
/* Check that the flags are a subset of the allowable. */
R_UNLESS((context_flags | ams::svc::ThreadContextFlag_All) == ams::svc::ThreadContextFlag_All, svc::ResultInvalidEnumValue());
}
#endif
/* Copy the thread context from userspace. */
ams::svc::ThreadContext context;
R_TRY(user_context.CopyTo(std::addressof(context)));
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Set the thread context. */
R_TRY(debug->SetThreadContext(context, thread_id, context_flags));
R_SUCCEED();
}
Result QueryDebugProcessMemory(ams::svc::MemoryInfo *out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle debug_handle, uintptr_t address) {
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Query the mapping's info. */
R_TRY(debug->QueryMemoryInfo(out_memory_info, out_page_info, address));
R_SUCCEED();
}
template<typename T>
Result QueryDebugProcessMemory(KUserPointer<T *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle debug_handle, uint64_t address) {
/* Get an ams::svc::MemoryInfo for the region. */
ams::svc::MemoryInfo info = {};
R_TRY(QueryDebugProcessMemory(std::addressof(info), out_page_info, debug_handle, address));
/* Copy the info to userspace. */
if constexpr (std::same_as<T, ams::svc::MemoryInfo>) {
R_TRY(out_memory_info.CopyFrom(std::addressof(info)));
} else {
/* Convert the info. */
T converted_info = {};
static_assert(std::same_as<decltype(T{}.base_address), decltype(ams::svc::MemoryInfo{}.base_address)>);
static_assert(std::same_as<decltype(T{}.size), decltype(ams::svc::MemoryInfo{}.size)>);
converted_info.base_address = info.base_address;
converted_info.size = info.size;
converted_info.state = info.state;
converted_info.attribute = info.attribute;
converted_info.permission = info.permission;
converted_info.ipc_count = info.ipc_count;
converted_info.device_count = info.device_count;
/* Copy it. */
R_TRY(out_memory_info.CopyFrom(std::addressof(converted_info)));
}
R_SUCCEED();
}
Result ReadDebugProcessMemory(uintptr_t buffer, ams::svc::Handle debug_handle, uintptr_t address, size_t size) {
/* Validate address / size. */
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
R_UNLESS((buffer < buffer + size), svc::ResultInvalidCurrentMemory());
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Read the memory. */
R_TRY(debug->ReadMemory(buffer, address, size));
R_SUCCEED();
}
Result WriteDebugProcessMemory(ams::svc::Handle debug_handle, uintptr_t buffer, uintptr_t address, size_t size) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Validate address / size. */
R_UNLESS(size > 0, svc::ResultInvalidSize());
R_UNLESS((address < address + size), svc::ResultInvalidCurrentMemory());
R_UNLESS((buffer < buffer + size), svc::ResultInvalidCurrentMemory());
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Write the memory. */
R_TRY(debug->WriteMemory(buffer, address, size));
R_SUCCEED();
}
Result SetHardwareBreakPoint(ams::svc::HardwareBreakPointRegisterName name, uint64_t flags, uint64_t value) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNotImplemented());
/* Set the breakpoint. */
R_TRY(KDebug::SetHardwareBreakPoint(name, flags, value));
R_SUCCEED();
}
Result GetDebugThreadParam(uint64_t *out_64, uint32_t *out_32, ams::svc::Handle debug_handle, uint64_t thread_id, ams::svc::DebugThreadParam param) {
/* Get the debug object. */
KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Get the thread from its id. */
KThread *thread = KThread::GetThreadFromId(thread_id);
R_UNLESS(thread != nullptr, svc::ResultInvalidThreadId());
ON_SCOPE_EXIT { thread->Close(); };
/* Get the process from the debug object. */
R_UNLESS(debug->IsAttached(), svc::ResultProcessTerminated());
R_UNLESS(debug->OpenProcess(), svc::ResultProcessTerminated());
/* Close the process when we're done. */
ON_SCOPE_EXIT { debug->CloseProcess(); };
/* Get the proces. */
KProcess * const process = debug->GetProcessUnsafe();
/* Verify that the process is the thread's parent. */
R_UNLESS(process == thread->GetOwnerProcess(), svc::ResultInvalidThreadId());
/* Get the parameter. */
switch (param) {
case ams::svc::DebugThreadParam_Priority:
{
/* Get the priority. */
*out_32 = thread->GetPriority();
}
break;
case ams::svc::DebugThreadParam_State:
{
/* Get the thread state and suspend status. */
KThread::ThreadState state;
bool suspended_user;
bool suspended_debug;
{
KScopedSchedulerLock sl;
state = thread->GetState();
suspended_user = thread->IsSuspendRequested(KThread::SuspendType_Thread);
suspended_debug = thread->IsSuspendRequested(KThread::SuspendType_Debug);
}
/* Set the suspend flags. */
*out_32 = 0;
if (suspended_user) {
*out_32 |= ams::svc::ThreadSuspend_User;
}
if (suspended_debug) {
*out_32 |= ams::svc::ThreadSuspend_Debug;
}
/* Set the state. */
switch (state) {
case KThread::ThreadState_Initialized:
{
*out_64 = ams::svc::ThreadState_Initializing;
}
break;
case KThread::ThreadState_Waiting:
{
*out_64 = ams::svc::ThreadState_Waiting;
}
break;
case KThread::ThreadState_Runnable:
{
*out_64 = ams::svc::ThreadState_Running;
}
break;
case KThread::ThreadState_Terminated:
{
*out_64 = ams::svc::ThreadState_Terminated;
}
break;
default:
R_THROW(svc::ResultInvalidState());
}
}
break;
case ams::svc::DebugThreadParam_IdealCore:
{
/* Get the ideal core. */
s32 core_id;
u64 affinity_mask;
thread->GetPhysicalCoreMask(std::addressof(core_id), std::addressof(affinity_mask));
*out_32 = core_id;
}
break;
case ams::svc::DebugThreadParam_CurrentCore:
{
/* Get the current core. */
*out_32 = thread->GetActiveCore();
}
break;
case ams::svc::DebugThreadParam_AffinityMask:
{
/* Get the affinity mask. */
s32 core_id;
u64 affinity_mask;
thread->GetPhysicalCoreMask(std::addressof(core_id), std::addressof(affinity_mask));
*out_32 = affinity_mask;
}
break;
default:
R_THROW(ams::svc::ResultInvalidEnumValue());
}
R_SUCCEED();
}
}
/* ============================= 64 ABI ============================= */
Result DebugActiveProcess64(ams::svc::Handle *out_handle, uint64_t process_id) {
R_RETURN(DebugActiveProcess(out_handle, process_id));
}
Result BreakDebugProcess64(ams::svc::Handle debug_handle) {
R_RETURN(BreakDebugProcess(debug_handle));
}
Result TerminateDebugProcess64(ams::svc::Handle debug_handle) {
R_RETURN(TerminateDebugProcess(debug_handle));
}
Result GetDebugEvent64(KUserPointer<ams::svc::lp64::DebugEventInfo *> out_info, ams::svc::Handle debug_handle) {
R_RETURN(GetDebugEvent(out_info, debug_handle));
}
Result ContinueDebugEvent64(ams::svc::Handle debug_handle, uint32_t flags, KUserPointer<const uint64_t *> thread_ids, int32_t num_thread_ids) {
R_RETURN(ContinueDebugEvent(debug_handle, flags, thread_ids, num_thread_ids));
}
Result LegacyContinueDebugEvent64(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
R_RETURN(LegacyContinueDebugEvent(debug_handle, flags, thread_id));
}
Result GetDebugThreadContext64(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {
R_RETURN(GetDebugThreadContext(out_context, debug_handle, thread_id, context_flags));
}
Result SetDebugThreadContext64(ams::svc::Handle debug_handle, uint64_t thread_id, KUserPointer<const ams::svc::ThreadContext *> context, uint32_t context_flags) {
R_RETURN(SetDebugThreadContext(debug_handle, thread_id, context, context_flags));
}
Result QueryDebugProcessMemory64(KUserPointer<ams::svc::lp64::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle debug_handle, ams::svc::Address address) {
R_RETURN(QueryDebugProcessMemory(out_memory_info, out_page_info, debug_handle, address));
}
Result ReadDebugProcessMemory64(ams::svc::Address buffer, ams::svc::Handle debug_handle, ams::svc::Address address, ams::svc::Size size) {
R_RETURN(ReadDebugProcessMemory(buffer, debug_handle, address, size));
}
Result WriteDebugProcessMemory64(ams::svc::Handle debug_handle, ams::svc::Address buffer, ams::svc::Address address, ams::svc::Size size) {
R_RETURN(WriteDebugProcessMemory(debug_handle, buffer, address, size));
}
Result SetHardwareBreakPoint64(ams::svc::HardwareBreakPointRegisterName name, uint64_t flags, uint64_t value) {
R_RETURN(SetHardwareBreakPoint(name, flags, value));
}
Result GetDebugThreadParam64(uint64_t *out_64, uint32_t *out_32, ams::svc::Handle debug_handle, uint64_t thread_id, ams::svc::DebugThreadParam param) {
R_RETURN(GetDebugThreadParam(out_64, out_32, debug_handle, thread_id, param));
}
/* ============================= 64From32 ABI ============================= */
Result DebugActiveProcess64From32(ams::svc::Handle *out_handle, uint64_t process_id) {
R_RETURN(DebugActiveProcess(out_handle, process_id));
}
Result BreakDebugProcess64From32(ams::svc::Handle debug_handle) {
R_RETURN(BreakDebugProcess(debug_handle));
}
Result TerminateDebugProcess64From32(ams::svc::Handle debug_handle) {
R_RETURN(TerminateDebugProcess(debug_handle));
}
Result GetDebugEvent64From32(KUserPointer<ams::svc::ilp32::DebugEventInfo *> out_info, ams::svc::Handle debug_handle) {
R_RETURN(GetDebugEvent(out_info, debug_handle));
}
Result ContinueDebugEvent64From32(ams::svc::Handle debug_handle, uint32_t flags, KUserPointer<const uint64_t *> thread_ids, int32_t num_thread_ids) {
R_RETURN(ContinueDebugEvent(debug_handle, flags, thread_ids, num_thread_ids));
}
Result LegacyContinueDebugEvent64From32(ams::svc::Handle debug_handle, uint32_t flags, uint64_t thread_id) {
R_RETURN(LegacyContinueDebugEvent(debug_handle, flags, thread_id));
}
Result GetDebugThreadContext64From32(KUserPointer<ams::svc::ThreadContext *> out_context, ams::svc::Handle debug_handle, uint64_t thread_id, uint32_t context_flags) {
R_RETURN(GetDebugThreadContext(out_context, debug_handle, thread_id, context_flags));
}
Result SetDebugThreadContext64From32(ams::svc::Handle debug_handle, uint64_t thread_id, KUserPointer<const ams::svc::ThreadContext *> context, uint32_t context_flags) {
R_RETURN(SetDebugThreadContext(debug_handle, thread_id, context, context_flags));
}
Result QueryDebugProcessMemory64From32(KUserPointer<ams::svc::ilp32::MemoryInfo *> out_memory_info, ams::svc::PageInfo *out_page_info, ams::svc::Handle debug_handle, ams::svc::Address address) {
R_RETURN(QueryDebugProcessMemory(out_memory_info, out_page_info, debug_handle, address));
}
Result ReadDebugProcessMemory64From32(ams::svc::Address buffer, ams::svc::Handle debug_handle, ams::svc::Address address, ams::svc::Size size) {
R_RETURN(ReadDebugProcessMemory(buffer, debug_handle, address, size));
}
Result WriteDebugProcessMemory64From32(ams::svc::Handle debug_handle, ams::svc::Address buffer, ams::svc::Address address, ams::svc::Size size) {
R_RETURN(WriteDebugProcessMemory(debug_handle, buffer, address, size));
}
Result SetHardwareBreakPoint64From32(ams::svc::HardwareBreakPointRegisterName name, uint64_t flags, uint64_t value) {
R_RETURN(SetHardwareBreakPoint(name, flags, value));
}
Result GetDebugThreadParam64From32(uint64_t *out_64, uint32_t *out_32, ams::svc::Handle debug_handle, uint64_t thread_id, ams::svc::DebugThreadParam param) {
R_RETURN(GetDebugThreadParam(out_64, out_32, debug_handle, thread_id, param));
}
}