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-rw-r--r--src/core/hle/kernel/shared_memory.cpp151
-rw-r--r--src/core/hle/kernel/shared_memory.h127
2 files changed, 58 insertions, 220 deletions
diff --git a/src/core/hle/kernel/shared_memory.cpp b/src/core/hle/kernel/shared_memory.cpp
index afb2e3fc2..e28da6869 100644
--- a/src/core/hle/kernel/shared_memory.cpp
+++ b/src/core/hle/kernel/shared_memory.cpp
@@ -2,149 +2,56 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
-#include <utility>
-
#include "common/assert.h"
-#include "common/logging/log.h"
-#include "core/hle/kernel/errors.h"
+#include "core/core.h"
#include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/page_table.h"
#include "core/hle/kernel/shared_memory.h"
namespace Kernel {
-SharedMemory::SharedMemory(KernelCore& kernel) : Object{kernel} {}
-SharedMemory::~SharedMemory() = default;
-
-std::shared_ptr<SharedMemory> SharedMemory::Create(KernelCore& kernel, Process* owner_process,
- u64 size, MemoryPermission permissions,
- MemoryPermission other_permissions,
- VAddr address, MemoryRegion region,
- std::string name) {
- std::shared_ptr<SharedMemory> shared_memory = std::make_shared<SharedMemory>(kernel);
-
- shared_memory->owner_process = owner_process;
- shared_memory->name = std::move(name);
- shared_memory->size = size;
- shared_memory->permissions = permissions;
- shared_memory->other_permissions = other_permissions;
-
- if (address == 0) {
- shared_memory->backing_block = std::make_shared<Kernel::PhysicalMemory>(size);
- shared_memory->backing_block_offset = 0;
-
- // Refresh the address mappings for the current process.
- if (kernel.CurrentProcess() != nullptr) {
- kernel.CurrentProcess()->VMManager().RefreshMemoryBlockMappings(
- shared_memory->backing_block.get());
- }
- } else {
- const auto& vm_manager = shared_memory->owner_process->VMManager();
+SharedMemory::SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory)
+ : Object{kernel}, device_memory{device_memory} {}
- // The memory is already available and mapped in the owner process.
- const auto vma = vm_manager.FindVMA(address);
- ASSERT_MSG(vm_manager.IsValidHandle(vma), "Invalid memory address");
- ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address");
-
- // The returned VMA might be a bigger one encompassing the desired address.
- const auto vma_offset = address - vma->first;
- ASSERT_MSG(vma_offset + size <= vma->second.size,
- "Shared memory exceeds bounds of mapped block");
-
- shared_memory->backing_block = vma->second.backing_block;
- shared_memory->backing_block_offset = vma->second.offset + vma_offset;
- }
-
- shared_memory->base_address = address;
+SharedMemory::~SharedMemory() = default;
- return shared_memory;
-}
+std::shared_ptr<SharedMemory> SharedMemory::Create(
+ KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process,
+ Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission,
+ Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size,
+ std::string name) {
-std::shared_ptr<SharedMemory> SharedMemory::CreateForApplet(
- KernelCore& kernel, std::shared_ptr<Kernel::PhysicalMemory> heap_block, std::size_t offset,
- u64 size, MemoryPermission permissions, MemoryPermission other_permissions, std::string name) {
- std::shared_ptr<SharedMemory> shared_memory = std::make_shared<SharedMemory>(kernel);
+ std::shared_ptr<SharedMemory> shared_memory{
+ std::make_shared<SharedMemory>(kernel, device_memory)};
- shared_memory->owner_process = nullptr;
- shared_memory->name = std::move(name);
+ shared_memory->owner_process = owner_process;
+ shared_memory->page_list = std::move(page_list);
+ shared_memory->owner_permission = owner_permission;
+ shared_memory->user_permission = user_permission;
+ shared_memory->physical_address = physical_address;
shared_memory->size = size;
- shared_memory->permissions = permissions;
- shared_memory->other_permissions = other_permissions;
- shared_memory->backing_block = std::move(heap_block);
- shared_memory->backing_block_offset = offset;
- shared_memory->base_address =
- kernel.CurrentProcess()->VMManager().GetHeapRegionBaseAddress() + offset;
+ shared_memory->name = name;
return shared_memory;
}
-ResultCode SharedMemory::Map(Process& target_process, VAddr address, MemoryPermission permissions,
- MemoryPermission other_permissions) {
- const MemoryPermission own_other_permissions =
- &target_process == owner_process ? this->permissions : this->other_permissions;
-
- // Automatically allocated memory blocks can only be mapped with other_permissions = DontCare
- if (base_address == 0 && other_permissions != MemoryPermission::DontCare) {
- return ERR_INVALID_MEMORY_PERMISSIONS;
- }
-
- // Error out if the requested permissions don't match what the creator process allows.
- if (static_cast<u32>(permissions) & ~static_cast<u32>(own_other_permissions)) {
- LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
- GetObjectId(), address, name);
- return ERR_INVALID_MEMORY_PERMISSIONS;
- }
+ResultCode SharedMemory::Map(Process& target_process, VAddr address, std::size_t size,
+ Memory::MemoryPermission permission) {
+ const u64 page_count{(size + Memory::PageSize - 1) / Memory::PageSize};
- // Error out if the provided permissions are not compatible with what the creator process needs.
- if (other_permissions != MemoryPermission::DontCare &&
- static_cast<u32>(this->permissions) & ~static_cast<u32>(other_permissions)) {
- LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
- GetObjectId(), address, name);
- return ERR_INVALID_MEMORY_PERMISSIONS;
+ if (page_list.GetNumPages() != page_count) {
+ UNIMPLEMENTED();
}
- VAddr target_address = address;
+ Memory::MemoryPermission expected =
+ &target_process == owner_process ? owner_permission : user_permission;
- // Map the memory block into the target process
- auto result = target_process.VMManager().MapMemoryBlock(
- target_address, backing_block, backing_block_offset, size, MemoryState::Shared);
- if (result.Failed()) {
- LOG_ERROR(
- Kernel,
- "cannot map id={}, target_address=0x{:X} name={}, error mapping to virtual memory",
- GetObjectId(), target_address, name);
- return result.Code();
+ if (permission != expected) {
+ UNIMPLEMENTED();
}
- return target_process.VMManager().ReprotectRange(target_address, size,
- ConvertPermissions(permissions));
-}
-
-ResultCode SharedMemory::Unmap(Process& target_process, VAddr address, u64 unmap_size) {
- if (unmap_size != size) {
- LOG_ERROR(Kernel,
- "Invalid size passed to Unmap. Size must be equal to the size of the "
- "memory managed. Shared memory size=0x{:016X}, Unmap size=0x{:016X}",
- size, unmap_size);
- return ERR_INVALID_SIZE;
- }
-
- // TODO(Subv): Verify what happens if the application tries to unmap an address that is not
- // mapped to a SharedMemory.
- return target_process.VMManager().UnmapRange(address, size);
-}
-
-VMAPermission SharedMemory::ConvertPermissions(MemoryPermission permission) {
- u32 masked_permissions =
- static_cast<u32>(permission) & static_cast<u32>(MemoryPermission::ReadWriteExecute);
- return static_cast<VMAPermission>(masked_permissions);
-}
-
-u8* SharedMemory::GetPointer(std::size_t offset) {
- return backing_block->data() + backing_block_offset + offset;
-}
-
-const u8* SharedMemory::GetPointer(std::size_t offset) const {
- return backing_block->data() + backing_block_offset + offset;
+ return target_process.PageTable().MapPages(address, page_list, Memory::MemoryState::Shared,
+ permission);
}
} // namespace Kernel
diff --git a/src/core/hle/kernel/shared_memory.h b/src/core/hle/kernel/shared_memory.h
index 014951d82..06fe693de 100644
--- a/src/core/hle/kernel/shared_memory.h
+++ b/src/core/hle/kernel/shared_memory.h
@@ -8,8 +8,10 @@
#include <string>
#include "common/common_types.h"
+#include "core/device_memory.h"
+#include "core/hle/kernel/memory/memory_block.h"
+#include "core/hle/kernel/memory/page_linked_list.h"
#include "core/hle/kernel/object.h"
-#include "core/hle/kernel/physical_memory.h"
#include "core/hle/kernel/process.h"
#include "core/hle/result.h"
@@ -17,63 +19,21 @@ namespace Kernel {
class KernelCore;
-/// Permissions for mapped shared memory blocks
-enum class MemoryPermission : u32 {
- None = 0,
- Read = (1u << 0),
- Write = (1u << 1),
- ReadWrite = (Read | Write),
- Execute = (1u << 2),
- ReadExecute = (Read | Execute),
- WriteExecute = (Write | Execute),
- ReadWriteExecute = (Read | Write | Execute),
- DontCare = (1u << 28)
-};
-
class SharedMemory final : public Object {
public:
- explicit SharedMemory(KernelCore& kernel);
+ explicit SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory);
~SharedMemory() override;
- /**
- * Creates a shared memory object.
- * @param kernel The kernel instance to create a shared memory instance under.
- * @param owner_process Process that created this shared memory object.
- * @param size Size of the memory block. Must be page-aligned.
- * @param permissions Permission restrictions applied to the process which created the block.
- * @param other_permissions Permission restrictions applied to other processes mapping the
- * block.
- * @param address The address from which to map the Shared Memory.
- * @param region If the address is 0, the shared memory will be allocated in this region of the
- * linear heap.
- * @param name Optional object name, used for debugging purposes.
- */
- static std::shared_ptr<SharedMemory> Create(KernelCore& kernel, Process* owner_process,
- u64 size, MemoryPermission permissions,
- MemoryPermission other_permissions,
- VAddr address = 0,
- MemoryRegion region = MemoryRegion::BASE,
- std::string name = "Unknown");
-
- /**
- * Creates a shared memory object from a block of memory managed by an HLE applet.
- * @param kernel The kernel instance to create a shared memory instance under.
- * @param heap_block Heap block of the HLE applet.
- * @param offset The offset into the heap block that the SharedMemory will map.
- * @param size Size of the memory block. Must be page-aligned.
- * @param permissions Permission restrictions applied to the process which created the block.
- * @param other_permissions Permission restrictions applied to other processes mapping the
- * block.
- * @param name Optional object name, used for debugging purposes.
- */
- static std::shared_ptr<SharedMemory> CreateForApplet(
- KernelCore& kernel, std::shared_ptr<Kernel::PhysicalMemory> heap_block, std::size_t offset,
- u64 size, MemoryPermission permissions, MemoryPermission other_permissions,
- std::string name = "Unknown Applet");
+ static std::shared_ptr<SharedMemory> Create(
+ KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process,
+ Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission,
+ Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size,
+ std::string name = "Unknown");
std::string GetTypeName() const override {
return "SharedMemory";
}
+
std::string GetName() const override {
return name;
}
@@ -83,71 +43,42 @@ public:
return HANDLE_TYPE;
}
- /// Gets the size of the underlying memory block in bytes.
- u64 GetSize() const {
- return size;
- }
-
- /**
- * Converts the specified MemoryPermission into the equivalent VMAPermission.
- * @param permission The MemoryPermission to convert.
- */
- static VMAPermission ConvertPermissions(MemoryPermission permission);
-
/**
* Maps a shared memory block to an address in the target process' address space
- * @param target_process Process on which to map the memory block.
+ * @param target_process Process on which to map the memory block
* @param address Address in system memory to map shared memory block to
+ * @param size Size of the shared memory block to map
* @param permissions Memory block map permissions (specified by SVC field)
- * @param other_permissions Memory block map other permissions (specified by SVC field)
- */
- ResultCode Map(Process& target_process, VAddr address, MemoryPermission permissions,
- MemoryPermission other_permissions);
-
- /**
- * Unmaps a shared memory block from the specified address in system memory
- *
- * @param target_process Process from which to unmap the memory block.
- * @param address Address in system memory where the shared memory block is mapped.
- * @param unmap_size The amount of bytes to unmap from this shared memory instance.
- *
- * @return Result code of the unmap operation
- *
- * @pre The given size to unmap must be the same size as the amount of memory managed by
- * the SharedMemory instance itself, otherwise ERR_INVALID_SIZE will be returned.
*/
- ResultCode Unmap(Process& target_process, VAddr address, u64 unmap_size);
+ ResultCode Map(Process& target_process, VAddr address, std::size_t size,
+ Memory::MemoryPermission permission);
/**
* Gets a pointer to the shared memory block
* @param offset Offset from the start of the shared memory block to get pointer
* @return A pointer to the shared memory block from the specified offset
*/
- u8* GetPointer(std::size_t offset = 0);
+ u8* GetPointer(std::size_t offset = 0) {
+ return device_memory.GetPointer(physical_address + offset);
+ }
/**
- * Gets a constant pointer to the shared memory block
+ * Gets a pointer to the shared memory block
* @param offset Offset from the start of the shared memory block to get pointer
- * @return A constant pointer to the shared memory block from the specified offset
+ * @return A pointer to the shared memory block from the specified offset
*/
- const u8* GetPointer(std::size_t offset = 0) const;
+ const u8* GetPointer(std::size_t offset = 0) const {
+ return device_memory.GetPointer(physical_address + offset);
+ }
private:
- /// Backing memory for this shared memory block.
- std::shared_ptr<PhysicalMemory> backing_block;
- /// Offset into the backing block for this shared memory.
- std::size_t backing_block_offset = 0;
- /// Size of the memory block. Page-aligned.
- u64 size = 0;
- /// Permission restrictions applied to the process which created the block.
- MemoryPermission permissions{};
- /// Permission restrictions applied to other processes mapping the block.
- MemoryPermission other_permissions{};
- /// Process that created this shared memory block.
- Process* owner_process;
- /// Address of shared memory block in the owner process if specified.
- VAddr base_address = 0;
- /// Name of shared memory object.
+ Core::DeviceMemory& device_memory;
+ Process* owner_process{};
+ Memory::PageLinkedList page_list;
+ Memory::MemoryPermission owner_permission{};
+ Memory::MemoryPermission user_permission{};
+ PAddr physical_address{};
+ std::size_t size{};
std::string name;
};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 13:04:37 +0100