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Merge pull request #3077 from Subv/hle_static_buffer

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Kernel/IPC: Implement StaticBuffer translation for HLE services that use the HLERequestContext architecture.
This commit is contained in:
Sebastian Valle 2017-11-19 11:34:02 -05:00 • committed by GitHub
commit 555c8ba7c1
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11 changed files with 182 additions and 45 deletions
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42
src/core/hle/kernel/hle_ipc.cpp
View file

@ -2,6 +2,7 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <vector>
#include <boost/range/algorithm_ext/erase.hpp>
#include "common/assert.h"
#include "common/common_types.h"
@ -44,6 +45,16 @@ void HLERequestContext::ClearIncomingObjects() {
request_handles.clear();
}
const std::vector<u8>& HLERequestContext::GetStaticBuffer(u8 buffer_id) const {
ASSERT_MSG(!static_buffers[buffer_id].empty(), "Empty static buffer!");
return static_buffers[buffer_id];
}
void HLERequestContext::AddStaticBuffer(u8 buffer_id, std::vector<u8> data) {
ASSERT(static_buffers[buffer_id].empty() && !data.empty());
static_buffers[buffer_id] = std::move(data);
}
ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf,
Process& src_process,
HandleTable& src_table) {
@ -84,6 +95,18 @@ ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* sr
cmd_buf[i++] = src_process.process_id;
break;
}
case IPC::DescriptorType::StaticBuffer: {
VAddr source_address = src_cmdbuf[i];
IPC::StaticBufferDescInfo buffer_info{descriptor};
// Copy the input buffer into our own vector and store it.
std::vector<u8> data(buffer_info.size);
Memory::ReadBlock(src_process, source_address, data.data(), data.size());
AddStaticBuffer(buffer_info.buffer_id, std::move(data));
cmd_buf[i++] = source_address;
break;
}
default:
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
}
@ -124,6 +147,25 @@ ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf, P
}
break;
}
case IPC::DescriptorType::StaticBuffer: {
IPC::StaticBufferDescInfo buffer_info{descriptor};
const auto& data = GetStaticBuffer(buffer_info.buffer_id);
// Grab the address that the target thread set up to receive the response static buffer
// and write our data there. The static buffers area is located right after the command
// buffer area.
size_t static_buffer_offset = IPC::COMMAND_BUFFER_LENGTH + 2 * buffer_info.buffer_id;
IPC::StaticBufferDescInfo target_descriptor{dst_cmdbuf[static_buffer_offset]};
VAddr target_address = dst_cmdbuf[static_buffer_offset + 1];
ASSERT_MSG(target_descriptor.size >= data.size(), "Static buffer data is too big");
Memory::WriteBlock(dst_process, target_address, data.data(), data.size());
dst_cmdbuf[i++] = target_address;
break;
}
default:
UNIMPLEMENTED_MSG("Unsupported handle translation: 0x%08X", descriptor);
}

14
src/core/hle/kernel/hle_ipc.h
View file

@ -119,6 +119,18 @@ public:
*/
void ClearIncomingObjects();
/**
* Retrieves the static buffer identified by the input buffer_id. The static buffer *must* have
* been created in PopulateFromIncomingCommandBuffer by way of an input StaticBuffer descriptor.
*/
const std::vector<u8>& GetStaticBuffer(u8 buffer_id) const;
/**
* Sets up a static buffer that will be copied to the target process when the request is
* translated.
*/
void AddStaticBuffer(u8 buffer_id, std::vector<u8> data);
/// Populates this context with data from the requesting process/thread.
ResultCode PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf, Process& src_process,
HandleTable& src_table);
@ -131,6 +143,8 @@ private:
SharedPtr<ServerSession> session;
// TODO(yuriks): Check common usage of this and optimize size accordingly
boost::container::small_vector<SharedPtr<Object>, 8> request_handles;
// The static buffers will be created when the IPC request is translated.
std::array<std::vector<u8>, IPC::MAX_STATIC_BUFFERS> static_buffers;
};
} // namespace Kernel