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Merge pull request #2687 from lioncash/tls-process

kernel/process: Allocate the process' TLS region during initialization
This commit is contained in:
bunnei 2019-07-18 13:53:04 -04:00 committed by GitHub
commit 5d369112d9
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3 changed files with 30 additions and 14 deletions

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@ -184,19 +184,11 @@ ResultCode Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
}
void Process::Run(s32 main_thread_priority, u64 stack_size) {
// The kernel always ensures that the given stack size is page aligned.
main_thread_stack_size = Common::AlignUp(stack_size, Memory::PAGE_SIZE);
// Allocate and map the main thread stack
// TODO(bunnei): This is heap area that should be allocated by the kernel and not mapped as part
// of the user address space.
const VAddr mapping_address = vm_manager.GetTLSIORegionEndAddress() - main_thread_stack_size;
vm_manager
.MapMemoryBlock(mapping_address, std::make_shared<std::vector<u8>>(main_thread_stack_size),
0, main_thread_stack_size, MemoryState::Stack)
.Unwrap();
AllocateMainThreadStack(stack_size);
tls_region_address = CreateTLSRegion();
vm_manager.LogLayout();
ChangeStatus(ProcessStatus::Running);
SetupMainThread(*this, kernel, main_thread_priority);
@ -226,6 +218,9 @@ void Process::PrepareForTermination() {
stop_threads(system.Scheduler(2).GetThreadList());
stop_threads(system.Scheduler(3).GetThreadList());
FreeTLSRegion(tls_region_address);
tls_region_address = 0;
ChangeStatus(ProcessStatus::Exited);
}
@ -325,4 +320,16 @@ void Process::ChangeStatus(ProcessStatus new_status) {
WakeupAllWaitingThreads();
}
void Process::AllocateMainThreadStack(u64 stack_size) {
// The kernel always ensures that the given stack size is page aligned.
main_thread_stack_size = Common::AlignUp(stack_size, Memory::PAGE_SIZE);
// Allocate and map the main thread stack
const VAddr mapping_address = vm_manager.GetTLSIORegionEndAddress() - main_thread_stack_size;
vm_manager
.MapMemoryBlock(mapping_address, std::make_shared<std::vector<u8>>(main_thread_stack_size),
0, main_thread_stack_size, MemoryState::Stack)
.Unwrap();
}
} // namespace Kernel

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@ -135,6 +135,11 @@ public:
return mutex;
}
/// Gets the address to the process' dedicated TLS region.
VAddr GetTLSRegionAddress() const {
return tls_region_address;
}
/// Gets the current status of the process
ProcessStatus GetStatus() const {
return status;
@ -296,6 +301,9 @@ private:
/// a process signal.
void ChangeStatus(ProcessStatus new_status);
/// Allocates the main thread stack for the process, given the stack size in bytes.
void AllocateMainThreadStack(u64 stack_size);
/// Memory manager for this process.
Kernel::VMManager vm_manager;
@ -358,6 +366,9 @@ private:
/// variable related facilities.
Mutex mutex;
/// Address indicating the location of the process' dedicated TLS region.
VAddr tls_region_address = 0;
/// Random values for svcGetInfo RandomEntropy
std::array<u64, RANDOM_ENTROPY_SIZE> random_entropy{};

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@ -843,9 +843,7 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, u64 ha
return RESULT_SUCCESS;
case GetInfoType::UserExceptionContextAddr:
LOG_WARNING(Kernel_SVC,
"(STUBBED) Attempted to query user exception context address, returned 0");
*result = 0;
*result = process->GetTLSRegionAddress();
return RESULT_SUCCESS;
case GetInfoType::TotalPhysicalMemoryAvailableWithoutSystemResource: