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Each thread gets a 0x200-byte area from the 0x1000-sized page, when all 8 thread slots in a single page are used up, the kernel allocates a new page to hold another 8 entries. This is consistent with what the real kernel does.
167 lines
5.4 KiB
C++
167 lines
5.4 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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#pragma once
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#include <bitset>
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#include <cstddef>
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#include <memory>
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#include <string>
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#include <boost/container/static_vector.hpp>
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#include "common/bit_field.h"
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#include "common/common_types.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/vm_manager.h"
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namespace Kernel {
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struct AddressMapping {
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// Address and size must be page-aligned
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VAddr address;
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u32 size;
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bool writable;
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bool unk_flag;
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};
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enum class MemoryRegion : u16 {
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APPLICATION = 1,
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SYSTEM = 2,
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BASE = 3,
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};
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union ProcessFlags {
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u16 raw;
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BitField< 0, 1, u16> allow_debug; ///< Allows other processes to attach to and debug this process.
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BitField< 1, 1, u16> force_debug; ///< Allows this process to attach to processes even if they don't have allow_debug set.
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BitField< 2, 1, u16> allow_nonalphanum;
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BitField< 3, 1, u16> shared_page_writable; ///< Shared page is mapped with write permissions.
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BitField< 4, 1, u16> privileged_priority; ///< Can use priority levels higher than 24.
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BitField< 5, 1, u16> allow_main_args;
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BitField< 6, 1, u16> shared_device_mem;
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BitField< 7, 1, u16> runnable_on_sleep;
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BitField< 8, 4, MemoryRegion> memory_region; ///< Default region for memory allocations for this process
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BitField<12, 1, u16> loaded_high; ///< Application loaded high (not at 0x00100000).
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};
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class ResourceLimit;
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struct MemoryRegionInfo;
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struct CodeSet final : public Object {
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static SharedPtr<CodeSet> Create(std::string name, u64 program_id);
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std::string GetTypeName() const override { return "CodeSet"; }
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std::string GetName() const override { return name; }
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static const HandleType HANDLE_TYPE = HandleType::CodeSet;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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/// Name of the process
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std::string name;
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/// Title ID corresponding to the process
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u64 program_id;
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std::shared_ptr<std::vector<u8>> memory;
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struct Segment {
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size_t offset = 0;
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VAddr addr = 0;
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u32 size = 0;
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};
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Segment code, rodata, data;
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VAddr entrypoint;
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private:
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CodeSet();
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~CodeSet() override;
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};
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class Process final : public Object {
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public:
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static SharedPtr<Process> Create(SharedPtr<CodeSet> code_set);
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std::string GetTypeName() const override { return "Process"; }
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std::string GetName() const override { return codeset->name; }
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static const HandleType HANDLE_TYPE = HandleType::Process;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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static u32 next_process_id;
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SharedPtr<CodeSet> codeset;
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/// Resource limit descriptor for this process
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SharedPtr<ResourceLimit> resource_limit;
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/// The process may only call SVCs which have the corresponding bit set.
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std::bitset<0x80> svc_access_mask;
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/// Maximum size of the handle table for the process.
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unsigned int handle_table_size = 0x200;
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/// Special memory ranges mapped into this processes address space. This is used to give
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/// processes access to specific I/O regions and device memory.
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boost::container::static_vector<AddressMapping, 8> address_mappings;
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ProcessFlags flags;
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/// Kernel compatibility version for this process
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u16 kernel_version = 0;
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/// The id of this process
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u32 process_id = next_process_id++;
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/**
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* Parses a list of kernel capability descriptors (as found in the ExHeader) and applies them
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* to this process.
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*/
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void ParseKernelCaps(const u32* kernel_caps, size_t len);
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/**
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* Applies address space changes and launches the process main thread.
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*/
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void Run(s32 main_thread_priority, u32 stack_size);
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///////////////////////////////////////////////////////////////////////////////////////////////
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// Memory Management
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VMManager vm_manager;
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// Memory used to back the allocations in the regular heap. A single vector is used to cover
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// the entire virtual address space extents that bound the allocations, including any holes.
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// This makes deallocation and reallocation of holes fast and keeps process memory contiguous
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// in the emulator address space, allowing Memory::GetPointer to be reasonably safe.
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std::shared_ptr<std::vector<u8>> heap_memory;
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// The left/right bounds of the address space covered by heap_memory.
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VAddr heap_start = 0, heap_end = 0;
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u32 heap_used = 0, linear_heap_used = 0, misc_memory_used = 0;
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MemoryRegionInfo* memory_region = nullptr;
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/// The Thread Local Storage area is allocated as processes create threads,
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/// each TLS area is 0x200 bytes, so one page (0x1000) is split up in 8 parts, and each part
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/// holds the TLS for a specific thread. This vector contains which parts are in use for each page as a bitmask.
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/// This vector will grow as more pages are allocated for new threads.
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std::vector<std::bitset<8>> tls_slots;
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VAddr GetLinearHeapAreaAddress() const;
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VAddr GetLinearHeapBase() const;
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VAddr GetLinearHeapLimit() const;
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ResultVal<VAddr> HeapAllocate(VAddr target, u32 size, VMAPermission perms);
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ResultCode HeapFree(VAddr target, u32 size);
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ResultVal<VAddr> LinearAllocate(VAddr target, u32 size, VMAPermission perms);
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ResultCode LinearFree(VAddr target, u32 size);
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private:
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Process();
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~Process() override;
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};
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extern SharedPtr<Process> g_current_process;
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}
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