2014-07-05 06:55:39 +02:00
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// Copyright 2014 Citra Emulator Project
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2014-12-17 06:38:14 +01:00
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// Licensed under GPLv2 or any later version
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2014-11-19 09:49:13 +01:00
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// Refer to the license.txt file included.
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2014-07-05 06:55:39 +02:00
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2018-07-19 01:02:47 +02:00
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#include <utility>
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2018-07-31 14:06:09 +02:00
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#include "common/assert.h"
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2015-05-06 09:06:12 +02:00
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#include "common/logging/log.h"
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2018-03-13 22:49:59 +01:00
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#include "core/core.h"
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2017-05-21 09:11:36 +02:00
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#include "core/hle/kernel/errors.h"
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2018-09-25 02:01:45 +02:00
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#include "core/hle/kernel/kernel.h"
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2016-09-21 08:52:38 +02:00
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#include "core/hle/kernel/shared_memory.h"
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#include "core/memory.h"
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2014-07-05 06:55:39 +02:00
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namespace Kernel {
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SharedMemory::SharedMemory(KernelCore& kernel) : Object{kernel} {}
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SharedMemory::~SharedMemory() = default;
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2015-02-01 01:56:59 +01:00
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2018-08-28 18:30:33 +02:00
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SharedPtr<SharedMemory> SharedMemory::Create(KernelCore& kernel, SharedPtr<Process> owner_process,
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u64 size, MemoryPermission permissions,
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MemoryPermission other_permissions, VAddr address,
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MemoryRegion region, std::string name) {
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SharedPtr<SharedMemory> shared_memory(new SharedMemory(kernel));
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2014-07-05 06:55:39 +02:00
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2018-07-19 01:02:47 +02:00
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shared_memory->owner_process = std::move(owner_process);
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2015-01-11 06:43:29 +01:00
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shared_memory->name = std::move(name);
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2015-05-11 00:47:07 +02:00
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shared_memory->size = size;
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shared_memory->permissions = permissions;
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shared_memory->other_permissions = other_permissions;
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2015-02-01 03:14:40 +01:00
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2018-08-04 02:45:39 +02:00
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if (address == 0) {
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shared_memory->backing_block = std::make_shared<std::vector<u8>>(size);
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shared_memory->backing_block_offset = 0;
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2018-08-03 05:37:44 +02:00
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2018-08-04 02:45:39 +02:00
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// Refresh the address mappings for the current process.
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if (Core::CurrentProcess() != nullptr) {
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2018-09-30 00:47:00 +02:00
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Core::CurrentProcess()->VMManager().RefreshMemoryBlockMappings(
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shared_memory->backing_block.get());
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}
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} else {
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auto& vm_manager = shared_memory->owner_process->VMManager();
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// The memory is already available and mapped in the owner process.
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auto vma = vm_manager.FindVMA(address);
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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 = address - 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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shared_memory->backing_block = vma->second.backing_block;
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shared_memory->backing_block_offset = vma->second.offset + vma_offset;
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}
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shared_memory->base_address = address;
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2015-02-01 03:14:40 +01:00
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return shared_memory;
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}
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2018-08-28 18:30:33 +02:00
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SharedPtr<SharedMemory> SharedMemory::CreateForApplet(
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2018-11-19 14:56:15 +01:00
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KernelCore& kernel, std::shared_ptr<std::vector<u8>> heap_block, std::size_t offset, u64 size,
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MemoryPermission permissions, MemoryPermission other_permissions, std::string name) {
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SharedPtr<SharedMemory> shared_memory(new SharedMemory(kernel));
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shared_memory->owner_process = nullptr;
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shared_memory->name = std::move(name);
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shared_memory->size = size;
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shared_memory->permissions = permissions;
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shared_memory->other_permissions = other_permissions;
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shared_memory->backing_block = std::move(heap_block);
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shared_memory->backing_block_offset = offset;
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shared_memory->base_address =
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kernel.CurrentProcess()->VMManager().GetHeapRegionBaseAddress() + offset;
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return shared_memory;
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}
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ResultCode SharedMemory::Map(Process* target_process, VAddr address, MemoryPermission permissions,
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MemoryPermission other_permissions) {
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const MemoryPermission own_other_permissions =
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target_process == owner_process ? this->permissions : this->other_permissions;
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2016-04-18 04:58:51 +02:00
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// Automatically allocated memory blocks can only be mapped with other_permissions = DontCare
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if (base_address == 0 && other_permissions != MemoryPermission::DontCare) {
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return ERR_INVALID_MEMORY_PERMISSIONS;
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}
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// Error out if the requested permissions don't match what the creator process allows.
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if (static_cast<u32>(permissions) & ~static_cast<u32>(own_other_permissions)) {
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2018-07-02 18:13:26 +02:00
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LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
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GetObjectId(), address, name);
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return ERR_INVALID_MEMORY_PERMISSIONS;
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}
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// Error out if the provided permissions are not compatible with what the creator process needs.
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if (other_permissions != MemoryPermission::DontCare &&
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static_cast<u32>(this->permissions) & ~static_cast<u32>(other_permissions)) {
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LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
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GetObjectId(), address, name);
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2018-08-25 11:40:42 +02:00
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return ERR_INVALID_MEMORY_PERMISSIONS;
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}
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2015-12-31 15:46:32 +01:00
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2016-04-18 04:07:52 +02:00
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VAddr target_address = address;
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2015-05-11 00:47:07 +02:00
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2016-04-18 04:07:52 +02:00
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// Map the memory block into the target process
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auto result = target_process->VMManager().MapMemoryBlock(
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target_address, backing_block, backing_block_offset, size, MemoryState::Shared);
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if (result.Failed()) {
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LOG_ERROR(
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Kernel,
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"cannot map id={}, target_address=0x{:X} name={}, error mapping to virtual memory",
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2018-04-26 01:11:22 +02:00
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GetObjectId(), target_address, name);
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return result.Code();
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}
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2014-07-05 16:22:03 +02:00
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2018-09-30 00:47:00 +02:00
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return target_process->VMManager().ReprotectRange(target_address, size,
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ConvertPermissions(permissions));
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2014-07-05 06:55:39 +02:00
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}
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2016-04-18 04:07:52 +02:00
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ResultCode SharedMemory::Unmap(Process* target_process, VAddr address) {
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// TODO(Subv): Verify what happens if the application tries to unmap an address that is not
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// mapped to a SharedMemory.
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2018-09-30 00:47:00 +02:00
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return target_process->VMManager().UnmapRange(address, size);
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2015-12-31 15:46:32 +01:00
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}
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2016-04-18 04:58:51 +02:00
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VMAPermission SharedMemory::ConvertPermissions(MemoryPermission permission) {
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u32 masked_permissions =
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static_cast<u32>(permission) & static_cast<u32>(MemoryPermission::ReadWriteExecute);
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return static_cast<VMAPermission>(masked_permissions);
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2018-04-26 01:52:48 +02:00
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}
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2016-04-18 04:58:51 +02:00
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2018-11-19 14:50:28 +01:00
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u8* SharedMemory::GetPointer(std::size_t offset) {
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return backing_block->data() + backing_block_offset + offset;
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2014-07-05 06:55:39 +02:00
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}
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2018-11-19 15:00:32 +01:00
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const u8* SharedMemory::GetPointer(std::size_t offset) const {
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return backing_block->data() + backing_block_offset + offset;
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}
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2017-10-01 20:57:50 +02:00
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} // namespace Kernel
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