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-rw-r--r--src/core/hle/kernel/shared_memory.cpp28
-rw-r--r--src/core/hle/kernel/shared_memory.h25
2 files changed, 37 insertions, 16 deletions
diff --git a/src/core/hle/kernel/shared_memory.cpp b/src/core/hle/kernel/shared_memory.cpp
index cb5c16696..0c59f4876 100644
--- a/src/core/hle/kernel/shared_memory.cpp
+++ b/src/core/hle/kernel/shared_memory.cpp
@@ -2,6 +2,8 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <cstring>
+
#include "common/logging/log.h"
#include "core/mem_map.h"
@@ -12,11 +14,15 @@ namespace Kernel {
SharedMemory::SharedMemory() {}
SharedMemory::~SharedMemory() {}
-SharedPtr<SharedMemory> SharedMemory::Create(std::string name) {
+SharedPtr<SharedMemory> SharedMemory::Create(u32 size, MemoryPermission permissions,
+ MemoryPermission other_permissions, std::string name) {
SharedPtr<SharedMemory> shared_memory(new SharedMemory);
shared_memory->name = std::move(name);
shared_memory->base_address = 0x0;
+ shared_memory->size = size;
+ shared_memory->permissions = permissions;
+ shared_memory->other_permissions = other_permissions;
return shared_memory;
}
@@ -24,7 +30,7 @@ SharedPtr<SharedMemory> SharedMemory::Create(std::string name) {
ResultCode SharedMemory::Map(VAddr address, MemoryPermission permissions,
MemoryPermission other_permissions) {
- if (address < Memory::SHARED_MEMORY_VADDR || address >= Memory::SHARED_MEMORY_VADDR_END) {
+ if (address < Memory::SHARED_MEMORY_VADDR || address + size >= Memory::SHARED_MEMORY_VADDR_END) {
LOG_ERROR(Kernel, "cannot map id=%u, address=0x%08X outside of shared mem bounds!",
GetObjectId(), address);
// TODO: Verify error code with hardware
@@ -32,21 +38,25 @@ ResultCode SharedMemory::Map(VAddr address, MemoryPermission permissions,
ErrorSummary::InvalidArgument, ErrorLevel::Permanent);
}
+ // TODO: Test permissions
+
+ // HACK: Since there's no way to write to the memory block without mapping it onto the game
+ // process yet, at least initialize memory the first time it's mapped.
+ if (address != this->base_address) {
+ std::memset(Memory::GetPointer(address), 0, size);
+ }
+
this->base_address = address;
- this->permissions = permissions;
- this->other_permissions = other_permissions;
return RESULT_SUCCESS;
}
-ResultVal<u8*> SharedMemory::GetPointer(u32 offset) {
+u8* SharedMemory::GetPointer(u32 offset) {
if (base_address != 0)
- return MakeResult<u8*>(Memory::GetPointer(base_address + offset));
+ return Memory::GetPointer(base_address + offset);
LOG_ERROR(Kernel_SVC, "memory block id=%u not mapped!", GetObjectId());
- // TODO(yuriks): Verify error code.
- return ResultCode(ErrorDescription::InvalidAddress, ErrorModule::Kernel,
- ErrorSummary::InvalidState, ErrorLevel::Permanent);
+ return nullptr;
}
} // namespace
diff --git a/src/core/hle/kernel/shared_memory.h b/src/core/hle/kernel/shared_memory.h
index 5833b411c..204266896 100644
--- a/src/core/hle/kernel/shared_memory.h
+++ b/src/core/hle/kernel/shared_memory.h
@@ -27,11 +27,16 @@ class SharedMemory final : public Object {
public:
/**
* Creates a shared memory object
- * @param name Optional object name, used only for debugging purposes.
+ * @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 SharedPtr<SharedMemory> Create(std::string name = "Unknown");
+ static SharedPtr<SharedMemory> Create(u32 size, MemoryPermission permissions,
+ MemoryPermission other_permissions, std::string name = "Unknown");
std::string GetTypeName() const override { return "SharedMemory"; }
+ std::string GetName() const override { return name; }
static const HandleType HANDLE_TYPE = HandleType::SharedMemory;
HandleType GetHandleType() const override { return HANDLE_TYPE; }
@@ -49,12 +54,18 @@ public:
* @param offset Offset from the start of the shared memory block to get pointer
* @return Pointer to the shared memory block from the specified offset
*/
- ResultVal<u8*> GetPointer(u32 offset = 0);
+ u8* GetPointer(u32 offset = 0);
- VAddr base_address; ///< Address of shared memory block in RAM
- MemoryPermission permissions; ///< Permissions of shared memory block (SVC field)
- MemoryPermission other_permissions; ///< Other permissions of shared memory block (SVC field)
- std::string name; ///< Name of shared memory object (optional)
+ /// Address of shared memory block in the process.
+ VAddr base_address;
+ /// Size of the memory block. Page-aligned.
+ u32 size;
+ /// Permission restrictions applied to the process which created the block.
+ MemoryPermission permissions;
+ /// Permission restrictions applied to other processes mapping the block.
+ MemoryPermission other_permissions;
+ /// Name of shared memory object.
+ std::string name;
private:
SharedMemory();