7c9644646f
This makes the formatting expectations more obvious (e.g. any zero padding specified is padding that's entirely dedicated to the value being printed, not any pretty-printing that also gets tacked on).
327 lines
11 KiB
C++
327 lines
11 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/hle/kernel/errors.h"
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#include "core/hle/kernel/memory.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/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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// Lists all processes that exist in the current session.
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static std::vector<SharedPtr<Process>> process_list;
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SharedPtr<CodeSet> CodeSet::Create(std::string name) {
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SharedPtr<CodeSet> codeset(new CodeSet);
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codeset->name = std::move(name);
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return codeset;
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}
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CodeSet::CodeSet() {}
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CodeSet::~CodeSet() {}
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u32 Process::next_process_id;
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SharedPtr<Process> Process::Create(std::string&& name) {
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SharedPtr<Process> process(new Process);
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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->status = ProcessStatus::Created;
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process->program_id = 0;
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process_list.push_back(process);
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return process;
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}
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void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
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for (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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NGLOG_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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NGLOG_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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NGLOG_INFO(Loader, "ExHeader kernel version: {}.{}", major, minor);
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} else {
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NGLOG_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(Memory::STACK_AREA_VADDR_END - 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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misc_memory_used += stack_size;
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memory_region->used += stack_size;
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// Map special address mappings
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MapSharedPages(vm_manager);
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for (const auto& mapping : address_mappings) {
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HandleSpecialMapping(vm_manager, mapping);
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}
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vm_manager.LogLayout();
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status = ProcessStatus::Running;
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Kernel::SetupMainThread(entry_point, main_thread_priority, this);
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}
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void Process::LoadModule(SharedPtr<CodeSet> module_, VAddr base_addr) {
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memory_region = GetMemoryRegion(flags.memory_region);
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auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions,
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MemoryState memory_state) {
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auto vma = vm_manager
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.MapMemoryBlock(segment.addr + base_addr, module_->memory, segment.offset,
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segment.size, memory_state)
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.Unwrap();
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vm_manager.Reprotect(vma, permissions);
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misc_memory_used += segment.size;
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memory_region->used += segment.size;
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};
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// Map CodeSet segments
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MapSegment(module_->code, VMAPermission::ReadExecute, MemoryState::CodeStatic);
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MapSegment(module_->rodata, VMAPermission::Read, MemoryState::CodeMutable);
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MapSegment(module_->data, VMAPermission::ReadWrite, MemoryState::CodeMutable);
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}
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VAddr Process::GetLinearHeapAreaAddress() const {
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// Starting from system version 8.0.0 a new linear heap layout is supported to allow usage of
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// the extra RAM in the n3DS.
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return kernel_version < 0x22C ? Memory::LINEAR_HEAP_VADDR : Memory::NEW_LINEAR_HEAP_VADDR;
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}
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VAddr Process::GetLinearHeapBase() const {
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return GetLinearHeapAreaAddress() + memory_region->base;
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}
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VAddr Process::GetLinearHeapLimit() const {
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return GetLinearHeapBase() + memory_region->size;
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}
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ResultVal<VAddr> Process::HeapAllocate(VAddr target, u64 size, VMAPermission perms) {
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if (target < Memory::HEAP_VADDR || target + size > Memory::HEAP_VADDR_END ||
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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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memory_region->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 < Memory::HEAP_VADDR || target + size > Memory::HEAP_VADDR_END ||
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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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memory_region->used -= size;
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return RESULT_SUCCESS;
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}
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ResultVal<VAddr> Process::LinearAllocate(VAddr target, u32 size, VMAPermission perms) {
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UNIMPLEMENTED();
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return {};
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}
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ResultCode Process::LinearFree(VAddr target, u32 size) {
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auto& linheap_memory = memory_region->linear_heap_memory;
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if (target < GetLinearHeapBase() || target + size > GetLinearHeapLimit() ||
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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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VAddr heap_end = GetLinearHeapBase() + (u32)linheap_memory->size();
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if (target + size > heap_end) {
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return ERR_INVALID_ADDRESS_STATE;
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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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linear_heap_used -= size;
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memory_region->used -= size;
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if (target + size == heap_end) {
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// End of linear heap has been freed, so check what's the last allocated block in it and
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// reduce the size.
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auto vma = vm_manager.FindVMA(target);
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ASSERT(vma != vm_manager.vma_map.end());
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ASSERT(vma->second.type == VMAType::Free);
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VAddr new_end = vma->second.base;
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if (new_end >= GetLinearHeapBase()) {
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linheap_memory->resize(new_end - GetLinearHeapBase());
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}
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}
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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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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() {}
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Kernel::Process::~Process() {}
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void ClearProcessList() {
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process_list.clear();
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}
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SharedPtr<Process> GetProcessById(u32 process_id) {
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auto itr = std::find_if(
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process_list.begin(), process_list.end(),
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[&](const SharedPtr<Process>& process) { return process->process_id == process_id; });
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if (itr == process_list.end())
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return nullptr;
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return *itr;
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}
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} // namespace Kernel
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