mirror of
https://github.com/PabloMK7/citra.git
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Core: Properly configure address space when loading a binary
The code now properly configures the process image to match the loaded binary segments (code, rodata, data) instead of just blindly allocating a large chunk of dummy memory.
This commit is contained in:
Yuri Kunde Schlesner
parent
51820691e7
commit
5c5cf2f8e0
11 changed files with 223 additions and 52 deletions
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@ -37,7 +37,7 @@ ArchiveFactory_SaveData::ArchiveFactory_SaveData(const std::string& sdmc_directo
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}
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ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveData::Open(const Path& path) {
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std::string concrete_mount_point = GetSaveDataPath(mount_point, Kernel::g_current_process->program_id);
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std::string concrete_mount_point = GetSaveDataPath(mount_point, Kernel::g_current_process->codeset->program_id);
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if (!FileUtil::Exists(concrete_mount_point)) {
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// When a SaveData archive is created for the first time, it is not yet formatted
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// and the save file/directory structure expected by the game has not yet been initialized.
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@ -52,7 +52,7 @@ ResultVal<std::unique_ptr<ArchiveBackend>> ArchiveFactory_SaveData::Open(const P
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}
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ResultCode ArchiveFactory_SaveData::Format(const Path& path) {
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std::string concrete_mount_point = GetSaveDataPath(mount_point, Kernel::g_current_process->program_id);
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std::string concrete_mount_point = GetSaveDataPath(mount_point, Kernel::g_current_process->codeset->program_id);
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FileUtil::DeleteDirRecursively(concrete_mount_point);
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FileUtil::CreateFullPath(concrete_mount_point);
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return RESULT_SUCCESS;
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@ -47,6 +47,7 @@ enum class HandleType : u32 {
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Semaphore = 10,
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Timer = 11,
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ResourceLimit = 12,
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CodeSet = 13,
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};
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enum {
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@ -5,24 +5,39 @@
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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 "common/make_unique.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/mem_map.h"
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#include "core/memory.h"
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namespace Kernel {
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SharedPtr<CodeSet> CodeSet::Create(std::string name, u64 program_id) {
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SharedPtr<CodeSet> codeset(new CodeSet);
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codeset->name = std::move(name);
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codeset->program_id = program_id;
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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, u64 program_id) {
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SharedPtr<Process> Process::Create(SharedPtr<CodeSet> code_set) {
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SharedPtr<Process> process(new Process);
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process->name = std::move(name);
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process->program_id = program_id;
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process->codeset = std::move(code_set);
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process->flags.raw = 0;
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process->flags.memory_region = MemoryRegion::APPLICATION;
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process->address_space = Common::make_unique<VMManager>();
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Memory::InitLegacyAddressSpace(*process->address_space);
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return process;
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}
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@ -87,8 +102,19 @@ void Process::ParseKernelCaps(const u32* kernel_caps, size_t len) {
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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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Kernel::SetupMainThread(entry_point, main_thread_priority);
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void Process::Run(s32 main_thread_priority, u32 stack_size) {
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auto MapSegment = [&](CodeSet::Segment& segment, VMAPermission permissions, MemoryState memory_state) {
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auto vma = address_space->MapMemoryBlock(segment.addr, codeset->memory,
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segment.offset, segment.size, memory_state).Unwrap();
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address_space->Reprotect(vma, permissions);
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};
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MapSegment(codeset->code, VMAPermission::ReadExecute, MemoryState::Code);
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MapSegment(codeset->rodata, VMAPermission::Read, MemoryState::Code);
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MapSegment(codeset->data, VMAPermission::ReadWrite, MemoryState::Private);
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address_space->LogLayout();
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Kernel::SetupMainThread(codeset->entrypoint, main_thread_priority);
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}
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Kernel::Process::Process() {}
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@ -47,23 +47,51 @@ union ProcessFlags {
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};
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class ResourceLimit;
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class VMManager;
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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(std::string name, u64 program_id);
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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 name; }
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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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/// 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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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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@ -81,6 +109,7 @@ public:
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/// Bitmask of the used TLS slots
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std::bitset<300> used_tls_slots;
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std::unique_ptr<VMManager> address_space;
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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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@ -91,7 +120,7 @@ public:
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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(VAddr entry_point, s32 main_thread_priority, u32 stack_size);
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void Run(s32 main_thread_priority, u32 stack_size);
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private:
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Process();
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@ -35,6 +35,10 @@ VMManager::VMManager() {
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Reset();
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}
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VMManager::~VMManager() {
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Reset();
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}
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void VMManager::Reset() {
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vma_map.clear();
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@ -130,6 +134,16 @@ void VMManager::Reprotect(VMAHandle vma_handle, VMAPermission new_perms) {
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MergeAdjacent(iter);
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}
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void VMManager::LogLayout() const {
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for (const auto& p : vma_map) {
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const VirtualMemoryArea& vma = p.second;
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LOG_DEBUG(Kernel, "%08X - %08X size: %8X %c%c%c", vma.base, vma.base + vma.size, vma.size,
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(u8)vma.permissions & (u8)VMAPermission::Read ? 'R' : '-',
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(u8)vma.permissions & (u8)VMAPermission::Write ? 'W' : '-',
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(u8)vma.permissions & (u8)VMAPermission::Execute ? 'X' : '-');
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}
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}
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VMManager::VMAIter VMManager::StripIterConstness(const VMAHandle & iter) {
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// This uses a neat C++ trick to convert a const_iterator to a regular iterator, given
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// non-const access to its container.
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@ -101,7 +101,7 @@ struct VirtualMemoryArea {
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* - http://duartes.org/gustavo/blog/post/how-the-kernel-manages-your-memory/
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* - http://duartes.org/gustavo/blog/post/page-cache-the-affair-between-memory-and-files/
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*/
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class VMManager {
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class VMManager final {
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// TODO(yuriks): Make page tables switchable to support multiple VMManagers
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public:
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/**
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@ -121,6 +121,7 @@ public:
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using VMAHandle = decltype(vma_map)::const_iterator;
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VMManager();
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~VMManager();
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/// Clears the address space map, re-initializing with a single free area.
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void Reset();
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@ -168,6 +169,9 @@ public:
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/// Changes the permissions of the given VMA.
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void Reprotect(VMAHandle vma, VMAPermission new_perms);
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/// Dumps the address space layout to the log, for debugging
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void LogLayout() const;
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private:
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using VMAIter = decltype(vma_map)::iterator;
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@ -101,7 +101,10 @@ static u32 TranslateAddr(u32 addr, const THREEloadinfo *loadinfo, u32* offsets)
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return loadinfo->seg_addrs[2] + addr - offsets[1];
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}
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static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr)
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using Kernel::SharedPtr;
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using Kernel::CodeSet;
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static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr, SharedPtr<CodeSet>* out_codeset)
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{
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if (!file.IsOpen())
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return ERROR_FILE;
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@ -201,13 +204,29 @@ static THREEDSX_Error Load3DSXFile(FileUtil::IOFile& file, u32 base_addr)
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}
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}
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// Write the data
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memcpy(Memory::GetPointer(base_addr), program_image.data(), program_image.size());
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// Create the CodeSet
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SharedPtr<CodeSet> code_set = CodeSet::Create("", 0);
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code_set->code.offset = loadinfo.seg_ptrs[0] - program_image.data();
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code_set->code.addr = loadinfo.seg_addrs[0];
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code_set->code.size = loadinfo.seg_sizes[0];
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code_set->rodata.offset = loadinfo.seg_ptrs[1] - program_image.data();
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code_set->rodata.addr = loadinfo.seg_addrs[1];
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code_set->rodata.size = loadinfo.seg_sizes[1];
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code_set->data.offset = loadinfo.seg_ptrs[2] - program_image.data();
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code_set->data.addr = loadinfo.seg_addrs[2];
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code_set->data.size = loadinfo.seg_sizes[2];
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code_set->entrypoint = code_set->code.addr;
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code_set->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
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LOG_DEBUG(Loader, "code size: 0x%X", loadinfo.seg_sizes[0]);
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LOG_DEBUG(Loader, "rodata size: 0x%X", loadinfo.seg_sizes[1]);
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LOG_DEBUG(Loader, "data size: 0x%X (including 0x%X of bss)", loadinfo.seg_sizes[2], hdr.bss_size);
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*out_codeset = code_set;
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return ERROR_NONE;
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}
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@ -230,17 +249,19 @@ ResultStatus AppLoader_THREEDSX::Load() {
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if (!file->IsOpen())
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return ResultStatus::Error;
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Kernel::g_current_process = Kernel::Process::Create(filename, 0);
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SharedPtr<CodeSet> codeset;
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if (Load3DSXFile(*file, Memory::PROCESS_IMAGE_VADDR, &codeset) != ERROR_NONE)
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return ResultStatus::Error;
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codeset->name = filename;
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Kernel::g_current_process = Kernel::Process::Create(std::move(codeset));
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Kernel::g_current_process->svc_access_mask.set();
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Kernel::g_current_process->address_mappings = default_address_mappings;
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// Attach the default resource limit (APPLICATION) to the process
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Kernel::g_current_process->resource_limit = Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
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if (Load3DSXFile(*file, Memory::PROCESS_IMAGE_VADDR) != ERROR_NONE)
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return ResultStatus::Error;
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Kernel::g_current_process->Run(Memory::PROCESS_IMAGE_VADDR, 48, Kernel::DEFAULT_STACK_SIZE);
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Kernel::g_current_process->Run(48, Kernel::DEFAULT_STACK_SIZE);
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is_loaded = true;
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return ResultStatus::Success;
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@ -16,6 +16,9 @@
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#include "core/loader/elf.h"
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#include "core/memory.h"
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using Kernel::SharedPtr;
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using Kernel::CodeSet;
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// ELF Header Constants
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@ -97,6 +100,12 @@ enum ElfSectionFlags
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#define PT_LOPROC 0x70000000
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#define PT_HIPROC 0x7FFFFFFF
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// Segment flags
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#define PF_X 0x1
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#define PF_W 0x2
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#define PF_R 0x4
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#define PF_MASKPROC 0xF0000000
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typedef unsigned int Elf32_Addr;
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typedef unsigned short Elf32_Half;
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typedef unsigned int Elf32_Off;
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@ -193,7 +202,7 @@ public:
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ElfMachine GetMachine() const { return (ElfMachine)(header->e_machine); }
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u32 GetEntryPoint() const { return entryPoint; }
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u32 GetFlags() const { return (u32)(header->e_flags); }
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void LoadInto(u32 vaddr);
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SharedPtr<CodeSet> LoadInto(u32 vaddr);
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bool LoadSymbols();
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int GetNumSegments() const { return (int)(header->e_phnum); }
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@ -249,7 +258,7 @@ const char *ElfReader::GetSectionName(int section) const {
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return nullptr;
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}
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void ElfReader::LoadInto(u32 vaddr) {
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SharedPtr<CodeSet> ElfReader::LoadInto(u32 vaddr) {
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LOG_DEBUG(Loader, "String section: %i", header->e_shstrndx);
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// Should we relocate?
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@ -267,19 +276,61 @@ void ElfReader::LoadInto(u32 vaddr) {
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u32 segment_addr[32];
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u32 base_addr = relocate ? vaddr : 0;
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for (unsigned i = 0; i < header->e_phnum; i++) {
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Elf32_Phdr* p = segments + i;
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LOG_DEBUG(Loader, "Type: %i Vaddr: %08x Filesz: %i Memsz: %i ", p->p_type, p->p_vaddr,
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u32 total_image_size = 0;
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for (unsigned int i = 0; i < header->e_phnum; ++i) {
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Elf32_Phdr* p = &segments[i];
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if (p->p_type == PT_LOAD) {
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total_image_size += (p->p_memsz + 0xFFF) & ~0xFFF;
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}
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}
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std::vector<u8> program_image(total_image_size);
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size_t current_image_position = 0;
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SharedPtr<CodeSet> codeset = CodeSet::Create("", 0);
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for (unsigned int i = 0; i < header->e_phnum; ++i) {
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Elf32_Phdr* p = &segments[i];
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LOG_DEBUG(Loader, "Type: %i Vaddr: %08X Filesz: %8X Memsz: %8X ", p->p_type, p->p_vaddr,
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p->p_filesz, p->p_memsz);
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if (p->p_type == PT_LOAD) {
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segment_addr[i] = base_addr + p->p_vaddr;
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memcpy(Memory::GetPointer(segment_addr[i]), GetSegmentPtr(i), p->p_filesz);
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LOG_DEBUG(Loader, "Loadable Segment Copied to %08x, size %08x", segment_addr[i],
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p->p_memsz);
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CodeSet::Segment* codeset_segment;
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u32 permission_flags = p->p_flags & (PF_R | PF_W | PF_X);
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if (permission_flags == (PF_R | PF_X)) {
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codeset_segment = &codeset->code;
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} else if (permission_flags == (PF_R)) {
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codeset_segment = &codeset->rodata;
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} else if (permission_flags == (PF_R | PF_W)) {
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codeset_segment = &codeset->data;
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} else {
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LOG_ERROR(Loader, "Unexpected ELF PT_LOAD segment id %u with flags %X", i, p->p_flags);
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continue;
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}
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if (codeset_segment->size != 0) {
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LOG_ERROR(Loader, "ELF has more than one segment of the same type. Skipping extra segment (id %i)", i);
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continue;
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}
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u32 segment_addr = base_addr + p->p_vaddr;
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u32 aligned_size = (p->p_memsz + 0xFFF) & ~0xFFF;
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codeset_segment->offset = current_image_position;
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codeset_segment->addr = segment_addr;
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codeset_segment->size = aligned_size;
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memcpy(&program_image[current_image_position], GetSegmentPtr(i), p->p_filesz);
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current_image_position += aligned_size;
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}
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}
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codeset->entrypoint = base_addr + header->e_entry;
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codeset->memory = std::make_shared<std::vector<u8>>(std::move(program_image));
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LOG_DEBUG(Loader, "Done loading.");
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return codeset;
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}
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SectionID ElfReader::GetSectionByName(const char *name, int firstSection) const {
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@ -352,18 +403,18 @@ ResultStatus AppLoader_ELF::Load() {
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if (file->ReadBytes(&buffer[0], size) != size)
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return ResultStatus::Error;
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Kernel::g_current_process = Kernel::Process::Create(filename, 0);
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ElfReader elf_reader(&buffer[0]);
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SharedPtr<CodeSet> codeset = elf_reader.LoadInto(Memory::PROCESS_IMAGE_VADDR);
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codeset->name = filename;
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Kernel::g_current_process = Kernel::Process::Create(std::move(codeset));
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Kernel::g_current_process->svc_access_mask.set();
|
||||
Kernel::g_current_process->address_mappings = default_address_mappings;
|
||||
|
||||
// Attach the default resource limit (APPLICATION) to the process
|
||||
Kernel::g_current_process->resource_limit = Kernel::ResourceLimit::GetForCategory(Kernel::ResourceLimitCategory::APPLICATION);
|
||||
|
||||
ElfReader elf_reader(&buffer[0]);
|
||||
elf_reader.LoadInto(Memory::PROCESS_IMAGE_VADDR);
|
||||
// TODO: Fill application title
|
||||
|
||||
Kernel::g_current_process->Run(elf_reader.GetEntryPoint(), 48, Kernel::DEFAULT_STACK_SIZE);
|
||||
Kernel::g_current_process->Run(48, Kernel::DEFAULT_STACK_SIZE);
|
||||
|
||||
is_loaded = true;
|
||||
return ResultStatus::Success;
|
||||
|
|
|
|||
|
|
@ -118,6 +118,9 @@ FileType AppLoader_NCCH::IdentifyType(FileUtil::IOFile& file) {
|
|||
}
|
||||
|
||||
ResultStatus AppLoader_NCCH::LoadExec() const {
|
||||
using Kernel::SharedPtr;
|
||||
using Kernel::CodeSet;
|
||||
|
||||
if (!is_loaded)
|
||||
return ResultStatus::ErrorNotLoaded;
|
||||
|
||||
|
|
@ -126,7 +129,30 @@ ResultStatus AppLoader_NCCH::LoadExec() const {
|
|||
std::string process_name = Common::StringFromFixedZeroTerminatedBuffer(
|
||||
(const char*)exheader_header.codeset_info.name, 8);
|
||||
u64 program_id = *reinterpret_cast<u64_le const*>(&ncch_header.program_id[0]);
|
||||
Kernel::g_current_process = Kernel::Process::Create(process_name, program_id);
|
||||
|
||||
SharedPtr<CodeSet> codeset = CodeSet::Create(process_name, program_id);
|
||||
|
||||
codeset->code.offset = 0;
|
||||
codeset->code.addr = exheader_header.codeset_info.text.address;
|
||||
codeset->code.size = exheader_header.codeset_info.text.num_max_pages * Memory::PAGE_SIZE;
|
||||
|
||||
codeset->rodata.offset = codeset->code.offset + codeset->code.size;
|
||||
codeset->rodata.addr = exheader_header.codeset_info.ro.address;
|
||||
codeset->rodata.size = exheader_header.codeset_info.ro.num_max_pages * Memory::PAGE_SIZE;
|
||||
|
||||
// TODO(yuriks): Not sure if the bss size is added to the page-aligned .data size or just
|
||||
// to the regular size. Playing it safe for now.
|
||||
u32 bss_page_size = (exheader_header.codeset_info.bss_size + 0xFFF) & ~0xFFF;
|
||||
code.resize(code.size() + bss_page_size, 0);
|
||||
|
||||
codeset->data.offset = codeset->rodata.offset + codeset->rodata.size;
|
||||
codeset->data.addr = exheader_header.codeset_info.data.address;
|
||||
codeset->data.size = exheader_header.codeset_info.data.num_max_pages * Memory::PAGE_SIZE + bss_page_size;
|
||||
|
||||
codeset->entrypoint = codeset->code.addr;
|
||||
codeset->memory = std::make_shared<std::vector<u8>>(std::move(code));
|
||||
|
||||
Kernel::g_current_process = Kernel::Process::Create(std::move(codeset));
|
||||
|
||||
// Attach a resource limit to the process based on the resource limit category
|
||||
Kernel::g_current_process->resource_limit = Kernel::ResourceLimit::GetForCategory(
|
||||
|
|
@ -137,11 +163,9 @@ ResultStatus AppLoader_NCCH::LoadExec() const {
|
|||
std::copy_n(exheader_header.arm11_kernel_caps.descriptors, kernel_caps.size(), begin(kernel_caps));
|
||||
Kernel::g_current_process->ParseKernelCaps(kernel_caps.data(), kernel_caps.size());
|
||||
|
||||
Memory::WriteBlock(entry_point, &code[0], code.size());
|
||||
|
||||
s32 priority = exheader_header.arm11_system_local_caps.priority;
|
||||
u32 stack_size = exheader_header.codeset_info.stack_size;
|
||||
Kernel::g_current_process->Run(entry_point, priority, stack_size);
|
||||
Kernel::g_current_process->Run(priority, stack_size);
|
||||
return ResultStatus::Success;
|
||||
}
|
||||
return ResultStatus::Error;
|
||||
|
|
|
|||
|
|
@ -32,7 +32,6 @@ struct MemoryArea {
|
|||
|
||||
// We don't declare the IO regions in here since its handled by other means.
|
||||
static MemoryArea memory_areas[] = {
|
||||
{PROCESS_IMAGE_VADDR, PROCESS_IMAGE_MAX_SIZE, "Process Image"}, // ExeFS:/.code is loaded here
|
||||
{HEAP_VADDR, HEAP_SIZE, "Heap"}, // Application heap (main memory)
|
||||
{SHARED_MEMORY_VADDR, SHARED_MEMORY_SIZE, "Shared Memory"}, // Shared memory
|
||||
{LINEAR_HEAP_VADDR, LINEAR_HEAP_SIZE, "Linear Heap"}, // Linear heap (main memory)
|
||||
|
|
@ -132,13 +131,13 @@ VAddr PhysicalToVirtualAddress(const PAddr addr) {
|
|||
return addr | 0x80000000;
|
||||
}
|
||||
|
||||
// TODO(yuriks): Move this into Process
|
||||
static Kernel::VMManager address_space;
|
||||
|
||||
void Init() {
|
||||
using namespace Kernel;
|
||||
|
||||
InitMemoryMap();
|
||||
LOG_DEBUG(HW_Memory, "initialized OK");
|
||||
}
|
||||
|
||||
void InitLegacyAddressSpace(Kernel::VMManager& address_space) {
|
||||
using namespace Kernel;
|
||||
|
||||
for (MemoryArea& area : memory_areas) {
|
||||
auto block = std::make_shared<std::vector<u8>>(area.size);
|
||||
|
|
@ -152,14 +151,11 @@ void Init() {
|
|||
auto shared_page_vma = address_space.MapBackingMemory(SHARED_PAGE_VADDR,
|
||||
(u8*)&SharedPage::shared_page, SHARED_PAGE_SIZE, MemoryState::Shared).MoveFrom();
|
||||
address_space.Reprotect(shared_page_vma, VMAPermission::Read);
|
||||
|
||||
LOG_DEBUG(HW_Memory, "initialized OK");
|
||||
}
|
||||
|
||||
void Shutdown() {
|
||||
heap_map.clear();
|
||||
heap_linear_map.clear();
|
||||
address_space.Reset();
|
||||
|
||||
LOG_DEBUG(HW_Memory, "shutdown OK");
|
||||
}
|
||||
|
|
|
|||
|
|
@ -6,9 +6,14 @@
|
|||
|
||||
#include "common/common_types.h"
|
||||
|
||||
namespace Kernel {
|
||||
class VMManager;
|
||||
}
|
||||
|
||||
namespace Memory {
|
||||
|
||||
void Init();
|
||||
void InitLegacyAddressSpace(Kernel::VMManager& address_space);
|
||||
void Shutdown();
|
||||
|
||||
/**
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue