1abed2f4c4
These only exist to ferry data into a Process instance and end up going out of scope quite early. Because of this, we can just make it a plain struct for holding things and just std::move it into the relevant function. There's no need to make this inherit from the kernel's Object type.
325 lines
12 KiB
C++
325 lines
12 KiB
C++
// Copyright 2015 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <memory>
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#include "common/assert.h"
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#include "common/common_funcs.h"
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#include "common/logging/log.h"
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#include "core/core.h"
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#include "core/file_sys/program_metadata.h"
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#include "core/hle/kernel/errors.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/process.h"
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#include "core/hle/kernel/resource_limit.h"
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#include "core/hle/kernel/scheduler.h"
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#include "core/hle/kernel/thread.h"
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#include "core/hle/kernel/vm_manager.h"
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#include "core/memory.h"
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namespace Kernel {
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CodeSet::CodeSet() = default;
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CodeSet::~CodeSet() = default;
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SharedPtr<Process> Process::Create(KernelCore& kernel, std::string&& name) {
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SharedPtr<Process> process(new Process(kernel));
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process->name = std::move(name);
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process->flags.raw = 0;
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process->flags.memory_region.Assign(MemoryRegion::APPLICATION);
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process->resource_limit = kernel.ResourceLimitForCategory(ResourceLimitCategory::APPLICATION);
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process->status = ProcessStatus::Created;
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process->program_id = 0;
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process->process_id = kernel.CreateNewProcessID();
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process->svc_access_mask.set();
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kernel.AppendNewProcess(process);
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return process;
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}
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void Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
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program_id = metadata.GetTitleID();
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is_64bit_process = metadata.Is64BitProgram();
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vm_manager.Reset(metadata.GetAddressSpaceType());
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}
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void Process::ParseKernelCaps(const u32* kernel_caps, std::size_t len) {
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for (std::size_t i = 0; i < len; ++i) {
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u32 descriptor = kernel_caps[i];
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u32 type = descriptor >> 20;
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if (descriptor == 0xFFFFFFFF) {
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// Unused descriptor entry
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continue;
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} else if ((type & 0xF00) == 0xE00) { // 0x0FFF
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// Allowed interrupts list
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LOG_WARNING(Loader, "ExHeader allowed interrupts list ignored");
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} else if ((type & 0xF80) == 0xF00) { // 0x07FF
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// Allowed syscalls mask
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unsigned int index = ((descriptor >> 24) & 7) * 24;
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u32 bits = descriptor & 0xFFFFFF;
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while (bits && index < svc_access_mask.size()) {
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svc_access_mask.set(index, bits & 1);
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++index;
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bits >>= 1;
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}
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} else if ((type & 0xFF0) == 0xFE0) { // 0x00FF
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// Handle table size
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handle_table_size = descriptor & 0x3FF;
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} else if ((type & 0xFF8) == 0xFF0) { // 0x007F
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// Misc. flags
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flags.raw = descriptor & 0xFFFF;
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} else if ((type & 0xFFE) == 0xFF8) { // 0x001F
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// Mapped memory range
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if (i + 1 >= len || ((kernel_caps[i + 1] >> 20) & 0xFFE) != 0xFF8) {
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LOG_WARNING(Loader, "Incomplete exheader memory range descriptor ignored.");
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continue;
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}
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u32 end_desc = kernel_caps[i + 1];
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++i; // Skip over the second descriptor on the next iteration
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AddressMapping mapping;
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mapping.address = descriptor << 12;
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VAddr end_address = end_desc << 12;
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if (mapping.address < end_address) {
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mapping.size = end_address - mapping.address;
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} else {
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mapping.size = 0;
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}
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mapping.read_only = (descriptor & (1 << 20)) != 0;
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mapping.unk_flag = (end_desc & (1 << 20)) != 0;
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address_mappings.push_back(mapping);
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} else if ((type & 0xFFF) == 0xFFE) { // 0x000F
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// Mapped memory page
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AddressMapping mapping;
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mapping.address = descriptor << 12;
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mapping.size = Memory::PAGE_SIZE;
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mapping.read_only = false;
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mapping.unk_flag = false;
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address_mappings.push_back(mapping);
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} else if ((type & 0xFE0) == 0xFC0) { // 0x01FF
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// Kernel version
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kernel_version = descriptor & 0xFFFF;
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int minor = kernel_version & 0xFF;
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int major = (kernel_version >> 8) & 0xFF;
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LOG_INFO(Loader, "ExHeader kernel version: {}.{}", major, minor);
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} else {
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LOG_ERROR(Loader, "Unhandled kernel caps descriptor: 0x{:08X}", descriptor);
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}
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}
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}
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void Process::Run(VAddr entry_point, s32 main_thread_priority, u32 stack_size) {
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// Allocate and map the main thread stack
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// TODO(bunnei): This is heap area that should be allocated by the kernel and not mapped as part
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// of the user address space.
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vm_manager
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.MapMemoryBlock(vm_manager.GetTLSIORegionEndAddress() - stack_size,
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std::make_shared<std::vector<u8>>(stack_size, 0), 0, stack_size,
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MemoryState::Mapped)
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.Unwrap();
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vm_manager.LogLayout();
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status = ProcessStatus::Running;
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Kernel::SetupMainThread(kernel, entry_point, main_thread_priority, *this);
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}
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void Process::PrepareForTermination() {
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status = ProcessStatus::Exited;
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const auto stop_threads = [this](const std::vector<SharedPtr<Thread>>& thread_list) {
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for (auto& thread : thread_list) {
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if (thread->GetOwnerProcess() != this)
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continue;
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if (thread == GetCurrentThread())
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continue;
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// TODO(Subv): When are the other running/ready threads terminated?
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ASSERT_MSG(thread->GetStatus() == ThreadStatus::WaitSynchAny ||
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thread->GetStatus() == ThreadStatus::WaitSynchAll,
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"Exiting processes with non-waiting threads is currently unimplemented");
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thread->Stop();
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}
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};
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auto& system = Core::System::GetInstance();
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stop_threads(system.Scheduler(0)->GetThreadList());
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stop_threads(system.Scheduler(1)->GetThreadList());
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stop_threads(system.Scheduler(2)->GetThreadList());
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stop_threads(system.Scheduler(3)->GetThreadList());
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}
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/**
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* Finds a free location for the TLS section of a thread.
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* @param tls_slots The TLS page array of the thread's owner process.
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* Returns a tuple of (page, slot, alloc_needed) where:
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* page: The index of the first allocated TLS page that has free slots.
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* slot: The index of the first free slot in the indicated page.
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* alloc_needed: Whether there's a need to allocate a new TLS page (All pages are full).
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*/
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static std::tuple<std::size_t, std::size_t, bool> FindFreeThreadLocalSlot(
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const std::vector<std::bitset<8>>& tls_slots) {
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// Iterate over all the allocated pages, and try to find one where not all slots are used.
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for (std::size_t page = 0; page < tls_slots.size(); ++page) {
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const auto& page_tls_slots = tls_slots[page];
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if (!page_tls_slots.all()) {
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// We found a page with at least one free slot, find which slot it is
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for (std::size_t slot = 0; slot < page_tls_slots.size(); ++slot) {
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if (!page_tls_slots.test(slot)) {
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return std::make_tuple(page, slot, false);
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}
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}
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}
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}
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return std::make_tuple(0, 0, true);
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}
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VAddr Process::MarkNextAvailableTLSSlotAsUsed(Thread& thread) {
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auto [available_page, available_slot, needs_allocation] = FindFreeThreadLocalSlot(tls_slots);
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const VAddr tls_begin = vm_manager.GetTLSIORegionBaseAddress();
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if (needs_allocation) {
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tls_slots.emplace_back(0); // The page is completely available at the start
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available_page = tls_slots.size() - 1;
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available_slot = 0; // Use the first slot in the new page
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// Allocate some memory from the end of the linear heap for this region.
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auto& tls_memory = thread.GetTLSMemory();
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tls_memory->insert(tls_memory->end(), Memory::PAGE_SIZE, 0);
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vm_manager.RefreshMemoryBlockMappings(tls_memory.get());
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vm_manager.MapMemoryBlock(tls_begin + available_page * Memory::PAGE_SIZE, tls_memory, 0,
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Memory::PAGE_SIZE, MemoryState::ThreadLocal);
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}
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tls_slots[available_page].set(available_slot);
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return tls_begin + available_page * Memory::PAGE_SIZE + available_slot * Memory::TLS_ENTRY_SIZE;
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}
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void Process::FreeTLSSlot(VAddr tls_address) {
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const VAddr tls_base = tls_address - vm_manager.GetTLSIORegionBaseAddress();
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const VAddr tls_page = tls_base / Memory::PAGE_SIZE;
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const VAddr tls_slot = (tls_base % Memory::PAGE_SIZE) / Memory::TLS_ENTRY_SIZE;
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tls_slots[tls_page].reset(tls_slot);
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}
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void Process::LoadModule(CodeSet module_, VAddr base_addr) {
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const auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions,
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MemoryState memory_state) {
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const auto vma = vm_manager
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.MapMemoryBlock(segment.addr + base_addr, module_.memory,
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segment.offset, segment.size, memory_state)
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.Unwrap();
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vm_manager.Reprotect(vma, permissions);
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};
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// Map CodeSet segments
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MapSegment(module_.CodeSegment(), VMAPermission::ReadExecute, MemoryState::CodeStatic);
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MapSegment(module_.RODataSegment(), VMAPermission::Read, MemoryState::CodeMutable);
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MapSegment(module_.DataSegment(), VMAPermission::ReadWrite, MemoryState::CodeMutable);
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}
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ResultVal<VAddr> Process::HeapAllocate(VAddr target, u64 size, VMAPermission perms) {
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if (target < vm_manager.GetHeapRegionBaseAddress() ||
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target + size > vm_manager.GetHeapRegionEndAddress() || target + size < target) {
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return ERR_INVALID_ADDRESS;
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}
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if (heap_memory == nullptr) {
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// Initialize heap
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heap_memory = std::make_shared<std::vector<u8>>();
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heap_start = heap_end = target;
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} else {
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vm_manager.UnmapRange(heap_start, heap_end - heap_start);
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}
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// If necessary, expand backing vector to cover new heap extents.
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if (target < heap_start) {
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heap_memory->insert(begin(*heap_memory), heap_start - target, 0);
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heap_start = target;
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vm_manager.RefreshMemoryBlockMappings(heap_memory.get());
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}
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if (target + size > heap_end) {
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heap_memory->insert(end(*heap_memory), (target + size) - heap_end, 0);
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heap_end = target + size;
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vm_manager.RefreshMemoryBlockMappings(heap_memory.get());
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}
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ASSERT(heap_end - heap_start == heap_memory->size());
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CASCADE_RESULT(auto vma, vm_manager.MapMemoryBlock(target, heap_memory, target - heap_start,
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size, MemoryState::Heap));
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vm_manager.Reprotect(vma, perms);
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heap_used = size;
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return MakeResult<VAddr>(heap_end - size);
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}
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ResultCode Process::HeapFree(VAddr target, u32 size) {
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if (target < vm_manager.GetHeapRegionBaseAddress() ||
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target + size > vm_manager.GetHeapRegionEndAddress() || target + size < target) {
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return ERR_INVALID_ADDRESS;
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}
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if (size == 0) {
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return RESULT_SUCCESS;
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}
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ResultCode result = vm_manager.UnmapRange(target, size);
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if (result.IsError())
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return result;
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heap_used -= size;
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return RESULT_SUCCESS;
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}
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ResultCode Process::MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size) {
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auto vma = vm_manager.FindVMA(src_addr);
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ASSERT_MSG(vma != vm_manager.vma_map.end(), "Invalid memory address");
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ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address");
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// The returned VMA might be a bigger one encompassing the desired address.
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auto vma_offset = src_addr - vma->first;
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ASSERT_MSG(vma_offset + size <= vma->second.size,
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"Shared memory exceeds bounds of mapped block");
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const std::shared_ptr<std::vector<u8>>& backing_block = vma->second.backing_block;
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std::size_t backing_block_offset = vma->second.offset + vma_offset;
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CASCADE_RESULT(auto new_vma,
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vm_manager.MapMemoryBlock(dst_addr, backing_block, backing_block_offset, size,
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MemoryState::Mapped));
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// Protect mirror with permissions from old region
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vm_manager.Reprotect(new_vma, vma->second.permissions);
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// Remove permissions from old region
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vm_manager.Reprotect(vma, VMAPermission::None);
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return RESULT_SUCCESS;
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}
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ResultCode Process::UnmapMemory(VAddr dst_addr, VAddr /*src_addr*/, u64 size) {
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return vm_manager.UnmapRange(dst_addr, size);
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}
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Kernel::Process::Process(KernelCore& kernel) : Object{kernel} {}
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Kernel::Process::~Process() {}
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} // namespace Kernel
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