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kern: SvcLegacyGetFutureThreadInfo

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This commit is contained in:
Michael Scire 2020-08-04 19:35:57 -07:00 committed by SciresM
parent 3ec9a9e59f
commit b8c2782ede
3 changed files with 92 additions and 43 deletions
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7
libraries/libmesosphere/source/arch/arm64/svc/kern_svc_tables.cpp
View file

@ -147,6 +147,13 @@ namespace ams::kern::svc {
if (table_64_from_32) { ::ams::kern::svc::PatchSvcTableEntry(table_64_from_32, svc::SvcId_QueryIoMapping, LegacyQueryIoMapping::Call64From32); }
}
/* 6.0.0 broke the ABI for GetFutureThreadInfo, and renamed it to GetDebugFutureThreadInfo. */
if (target_fw < TargetFirmware_6_0_0) {
static_assert(svc::SvcId_GetDebugFutureThreadInfo == svc::SvcId_LegacyGetFutureThreadInfo);
if (table_64) { ::ams::kern::svc::PatchSvcTableEntry(table_64, svc::SvcId_GetDebugFutureThreadInfo, LegacyGetFutureThreadInfo::Call64); }
if (table_64_from_32) { ::ams::kern::svc::PatchSvcTableEntry(table_64_from_32, svc::SvcId_GetDebugFutureThreadInfo, LegacyGetFutureThreadInfo::Call64From32); }
}
/* 3.0.0 broke the ABI for ContinueDebugEvent. */
if (target_fw < TargetFirmware_3_0_0) {
if (table_64) { ::ams::kern::svc::PatchSvcTableEntry(table_64, svc::SvcId_ContinueDebugEvent, LegacyContinueDebugEvent::Call64); }

127
libraries/libmesosphere/source/svc/kern_svc_thread_profiler.cpp
View file

@ -21,6 +21,56 @@ namespace ams::kern::svc {
namespace {
Result GetLastThreadInfoImpl(ams::svc::LastThreadContext *out_context, uintptr_t *out_tls_address, uint32_t *out_flags) {
/* Disable interrupts. */
KScopedInterruptDisable di;
/* Get the previous thread. */
KThread *prev_thread = Kernel::GetScheduler().GetPreviousThread();
R_UNLESS(prev_thread != nullptr, svc::ResultNoThread());
/* Verify the last thread was owned by the current process. */
R_UNLESS(prev_thread->GetOwnerProcess() == GetCurrentProcessPointer(), svc::ResultUnknownThread());
/* Clear the output flags. */
*out_flags = 0;
/* Get the thread's exception context. */
GetExceptionContext(prev_thread)->GetSvcThreadContext(out_context);
/* Get the tls address. */
*out_tls_address = GetInteger(prev_thread->GetThreadLocalRegionAddress());
/* Set the syscall flag if appropriate. */
if (prev_thread->IsCallingSvc()) {
*out_flags |= ams::svc::LastThreadInfoFlag_ThreadInSystemCall;
}
return ResultSuccess();
}
Result SynchronizeCurrentProcessToFutureTime(int64_t ns) {
/* Get the wait object. */
KWaitObject *wait_object = GetCurrentProcess().GetWaitObjectPointer();
/* Convert the timeout from nanoseconds to ticks. */
s64 timeout;
if (ns > 0) {
u64 ticks = KHardwareTimer::GetTick();
ticks += ams::svc::Tick(TimeSpan::FromNanoSeconds(ns));
ticks += 2;
timeout = ticks;
} else {
timeout = ns;
}
/* Synchronize to the desired time. */
R_TRY(wait_object->Synchronize(timeout));
return ResultSuccess();
}
Result GetDebugFutureThreadInfo(ams::svc::LastThreadContext *out_context, uint64_t *out_thread_id, ams::svc::Handle debug_handle, int64_t ns) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNoThread());
@ -30,25 +80,7 @@ namespace ams::kern::svc {
R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
/* Synchronize the current process to the desired time. */
{
/* Get the wait object. */
KWaitObject *wait_object = GetCurrentProcess().GetWaitObjectPointer();
/* Convert the timeout from nanoseconds to ticks. */
s64 timeout;
if (ns > 0) {
u64 ticks = KHardwareTimer::GetTick();
ticks += ams::svc::Tick(TimeSpan::FromNanoSeconds(ns));
ticks += 2;
timeout = ticks;
} else {
timeout = ns;
}
/* Synchronize to the desired time. */
R_TRY(wait_object->Synchronize(timeout));
}
R_TRY(SynchronizeCurrentProcessToFutureTime(ns));
/* Get the running thread info. */
R_TRY(debug->GetRunningThreadInfo(out_context, out_thread_id));
@ -56,35 +88,25 @@ namespace ams::kern::svc {
return ResultSuccess();
}
Result LegacyGetFutureThreadInfo(ams::svc::LastThreadContext *out_context, uintptr_t *out_tls_address, uint32_t *out_flags, int64_t ns) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNoThread());
/* Synchronize the current process to the desired time. */
R_TRY(SynchronizeCurrentProcessToFutureTime(ns));
/* Get the thread info. */
R_TRY(GetLastThreadInfoImpl(out_context, out_tls_address, out_flags));
return ResultSuccess();
}
Result GetLastThreadInfo(ams::svc::LastThreadContext *out_context, uintptr_t *out_tls_address, uint32_t *out_flags) {
/* Only allow invoking the svc on development hardware. */
R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNoThread());
/* Get the thread info. */
{
KScopedInterruptDisable di;
/* Get the previous thread. */
KThread *prev_thread = Kernel::GetScheduler().GetPreviousThread();
R_UNLESS(prev_thread != nullptr, svc::ResultNoThread());
/* Verify the last thread was owned by the current process. */
R_UNLESS(prev_thread->GetOwnerProcess() == GetCurrentProcessPointer(), svc::ResultUnknownThread());
/* Clear the output flags. */
*out_flags = 0;
/* Get the thread's exception context. */
GetExceptionContext(prev_thread)->GetSvcThreadContext(out_context);
/* Get the tls address. */
*out_tls_address = GetInteger(prev_thread->GetThreadLocalRegionAddress());
/* Set the syscall flag if appropriate. */
if (prev_thread->IsCallingSvc()) {
*out_flags |= ams::svc::LastThreadInfoFlag_ThreadInSystemCall;
}
}
R_TRY(GetLastThreadInfoImpl(out_context, out_tls_address, out_flags));
return ResultSuccess();
}
@ -97,6 +119,10 @@ namespace ams::kern::svc {
return GetDebugFutureThreadInfo(out_context, out_thread_id, debug_handle, ns);
}
Result LegacyGetFutureThreadInfo64(ams::svc::lp64::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags, int64_t ns) {
return LegacyGetFutureThreadInfo(out_context, reinterpret_cast<uintptr_t *>(out_tls_address), out_flags, ns);
}
Result GetLastThreadInfo64(ams::svc::lp64::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags) {
static_assert(sizeof(*out_tls_address) == sizeof(uintptr_t));
return GetLastThreadInfo(out_context, reinterpret_cast<uintptr_t *>(out_tls_address), out_flags);
@ -117,6 +143,21 @@ namespace ams::kern::svc {
return ResultSuccess();
}
Result LegacyGetFutureThreadInfo64From32(ams::svc::ilp32::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags, int64_t ns) {
static_assert(sizeof(*out_tls_address) == sizeof(uintptr_t));
ams::svc::LastThreadContext context = {};
R_TRY(LegacyGetFutureThreadInfo(std::addressof(context), reinterpret_cast<uintptr_t *>(out_tls_address), out_flags, ns));
*out_context = {
.fp = static_cast<u32>(context.fp),
.sp = static_cast<u32>(context.sp),
.lr = static_cast<u32>(context.lr),
.pc = static_cast<u32>(context.pc),
};
return ResultSuccess();
}
Result GetLastThreadInfo64From32(ams::svc::ilp32::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags) {
static_assert(sizeof(*out_tls_address) == sizeof(uintptr_t));

1
libraries/libvapours/include/vapours/svc/svc_definitions.hpp
View file

@ -151,6 +151,7 @@
HANDLER(0x7E, Result, SetResourceLimitLimitValue, INPUT(::ams::svc::Handle, resource_limit_handle), INPUT(::ams::svc::LimitableResource, which), INPUT(int64_t, limit_value)) \
HANDLER(0x7F, void, CallSecureMonitor, OUTPUT(::ams::svc::NAMESPACE::SecureMonitorArguments, args)) \
\
HANDLER(0x2E, Result, LegacyGetFutureThreadInfo, OUTPUT(::ams::svc::NAMESPACE::LastThreadContext, out_context), OUTPUT(::ams::svc::Address, out_tls_address), OUTPUT(uint32_t, out_flags), INPUT(int64_t, ns)) \
HANDLER(0x55, Result, LegacyQueryIoMapping, OUTPUT(::ams::svc::Address, out_address), INPUT(::ams::svc::PhysicalAddress, physical_address), INPUT(::ams::svc::Size, size)) \
HANDLER(0x64, Result, LegacyContinueDebugEvent, INPUT(::ams::svc::Handle, debug_handle), INPUT(uint32_t, flags), INPUT(uint64_t, thread_id))