mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* 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
177 lines
7.2 KiB
C++
177 lines
7.2 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::svc {
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/* ============================= Common ============================= */
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namespace {
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Result GetLastThreadInfoImpl(ams::svc::LastThreadContext *out_context, uintptr_t *out_tls_address, uint32_t *out_flags) {
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/* Disable interrupts. */
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KScopedInterruptDisable di;
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/* Get the previous thread. */
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KThread *prev_thread = Kernel::GetScheduler().GetPreviousThread();
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R_UNLESS(prev_thread != nullptr, svc::ResultNoThread());
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/* Verify the last thread was owned by the current process. */
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R_UNLESS(prev_thread->GetOwnerProcess() == GetCurrentProcessPointer(), svc::ResultUnknownThread());
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/* Clear the output flags. */
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*out_flags = 0;
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/* Get the thread's exception context. */
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GetExceptionContext(prev_thread)->GetSvcThreadContext(out_context);
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/* Get the tls address. */
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*out_tls_address = GetInteger(prev_thread->GetThreadLocalRegionAddress());
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/* Set the syscall flag if appropriate. */
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if (prev_thread->IsCallingSvc()) {
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*out_flags |= ams::svc::LastThreadInfoFlag_ThreadInSystemCall;
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}
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R_SUCCEED();
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}
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Result SynchronizeCurrentProcessToFutureTime(int64_t ns) {
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/* Get the wait object. */
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KWaitObject *wait_object = GetCurrentProcess().GetWaitObjectPointer();
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/* Convert the timeout from nanoseconds to ticks. */
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s64 timeout;
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if (ns > 0) {
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u64 ticks = KHardwareTimer::GetTick();
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ticks += ams::svc::Tick(TimeSpan::FromNanoSeconds(ns));
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ticks += 2;
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timeout = ticks;
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} else {
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timeout = ns;
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}
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/* Synchronize to the desired time. */
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R_TRY(wait_object->Synchronize(timeout));
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R_SUCCEED();
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}
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Result GetDebugFutureThreadInfo(ams::svc::LastThreadContext *out_context, uint64_t *out_thread_id, ams::svc::Handle debug_handle, int64_t ns) {
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/* Only allow invoking the svc on development hardware. */
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R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNoThread());
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/* Get the debug object. */
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KScopedAutoObject debug = GetCurrentProcess().GetHandleTable().GetObject<KDebug>(debug_handle);
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R_UNLESS(debug.IsNotNull(), svc::ResultInvalidHandle());
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/* Synchronize the current process to the desired time. */
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R_TRY(SynchronizeCurrentProcessToFutureTime(ns));
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/* Get the running thread info. */
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R_TRY(debug->GetRunningThreadInfo(out_context, out_thread_id));
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R_SUCCEED();
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}
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Result LegacyGetFutureThreadInfo(ams::svc::LastThreadContext *out_context, uintptr_t *out_tls_address, uint32_t *out_flags, int64_t ns) {
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/* Only allow invoking the svc on development hardware. */
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R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNoThread());
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/* Synchronize the current process to the desired time. */
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R_TRY(SynchronizeCurrentProcessToFutureTime(ns));
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/* Get the thread info. */
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R_TRY(GetLastThreadInfoImpl(out_context, out_tls_address, out_flags));
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R_SUCCEED();
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}
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Result GetLastThreadInfo(ams::svc::LastThreadContext *out_context, uintptr_t *out_tls_address, uint32_t *out_flags) {
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/* Only allow invoking the svc on development hardware. */
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R_UNLESS(KTargetSystem::IsDebugMode(), svc::ResultNoThread());
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/* Get the thread info. */
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R_TRY(GetLastThreadInfoImpl(out_context, out_tls_address, out_flags));
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R_SUCCEED();
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}
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}
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/* ============================= 64 ABI ============================= */
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Result GetDebugFutureThreadInfo64(ams::svc::lp64::LastThreadContext *out_context, uint64_t *out_thread_id, ams::svc::Handle debug_handle, int64_t ns) {
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R_RETURN(GetDebugFutureThreadInfo(out_context, out_thread_id, debug_handle, ns));
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}
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Result LegacyGetFutureThreadInfo64(ams::svc::lp64::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags, int64_t ns) {
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R_RETURN(LegacyGetFutureThreadInfo(out_context, reinterpret_cast<uintptr_t *>(out_tls_address), out_flags, ns));
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}
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Result GetLastThreadInfo64(ams::svc::lp64::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags) {
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static_assert(sizeof(*out_tls_address) == sizeof(uintptr_t));
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R_RETURN(GetLastThreadInfo(out_context, reinterpret_cast<uintptr_t *>(out_tls_address), out_flags));
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}
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/* ============================= 64From32 ABI ============================= */
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Result GetDebugFutureThreadInfo64From32(ams::svc::ilp32::LastThreadContext *out_context, uint64_t *out_thread_id, ams::svc::Handle debug_handle, int64_t ns) {
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ams::svc::LastThreadContext context = {};
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R_TRY(GetDebugFutureThreadInfo(std::addressof(context), out_thread_id, debug_handle, ns));
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*out_context = {
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.fp = static_cast<u32>(context.fp),
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.sp = static_cast<u32>(context.sp),
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.lr = static_cast<u32>(context.lr),
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.pc = static_cast<u32>(context.pc),
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};
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R_SUCCEED();
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}
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Result LegacyGetFutureThreadInfo64From32(ams::svc::ilp32::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags, int64_t ns) {
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static_assert(sizeof(*out_tls_address) == sizeof(uintptr_t));
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ams::svc::LastThreadContext context = {};
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R_TRY(LegacyGetFutureThreadInfo(std::addressof(context), reinterpret_cast<uintptr_t *>(out_tls_address), out_flags, ns));
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*out_context = {
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.fp = static_cast<u32>(context.fp),
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.sp = static_cast<u32>(context.sp),
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.lr = static_cast<u32>(context.lr),
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.pc = static_cast<u32>(context.pc),
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};
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R_SUCCEED();
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}
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Result GetLastThreadInfo64From32(ams::svc::ilp32::LastThreadContext *out_context, ams::svc::Address *out_tls_address, uint32_t *out_flags) {
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static_assert(sizeof(*out_tls_address) == sizeof(uintptr_t));
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ams::svc::LastThreadContext context = {};
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R_TRY(GetLastThreadInfo(std::addressof(context), reinterpret_cast<uintptr_t *>(out_tls_address), out_flags));
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*out_context = {
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.fp = static_cast<u32>(context.fp),
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.sp = static_cast<u32>(context.sp),
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.lr = static_cast<u32>(context.lr),
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.pc = static_cast<u32>(context.pc),
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};
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R_SUCCEED();
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}
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}
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