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https://github.com/yuzu-emu/yuzu.git
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ServiceFramework: Use separate copy of command buffer
Copy the IPC command buffer to/from the request context before/after the handler is invoked. This is part of a move away from using global data for handling IPC requests.
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@ -44,6 +44,9 @@ inline u32* GetStaticBuffers(const int offset = 0) {
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namespace IPC {
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/// Size of the command buffer area, in 32-bit words.
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constexpr size_t COMMAND_BUFFER_LENGTH = 0x100 / sizeof(u32);
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// These errors are commonly returned by invalid IPC translations, so alias them here for
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// convenience.
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// TODO(yuriks): These will probably go away once translation is implemented inside the kernel.
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@ -4,8 +4,11 @@
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#pragma once
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#include <array>
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#include <memory>
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#include <vector>
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#include "common/common_types.h"
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#include "core/hle/ipc.h"
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#include "core/hle/kernel/kernel.h"
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#include "core/hle/kernel/server_session.h"
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@ -65,8 +68,8 @@ public:
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~HLERequestContext();
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/// Returns a pointer to the IPC command buffer for this request.
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u32* CommandBuffer() const {
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return cmd_buf;
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u32* CommandBuffer() {
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return cmd_buf.data();
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}
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/**
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@ -80,7 +83,7 @@ public:
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private:
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friend class Service::ServiceFrameworkBase;
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u32* cmd_buf = nullptr;
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std::array<u32, IPC::COMMAND_BUFFER_LENGTH> cmd_buf;
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SharedPtr<ServerSession> session;
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};
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@ -2,9 +2,12 @@
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <fmt/format.h>
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#include "common/assert.h"
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#include "common/logging/log.h"
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#include "common/string_util.h"
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#include "core/hle/ipc.h"
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#include "core/hle/kernel/client_port.h"
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#include "core/hle/kernel/server_port.h"
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#include "core/hle/kernel/server_session.h"
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@ -160,12 +163,6 @@ void ServiceFrameworkBase::ReportUnimplementedFunction(u32* cmd_buf, const Funct
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void ServiceFrameworkBase::HandleSyncRequest(SharedPtr<ServerSession> server_session) {
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u32* cmd_buf = Kernel::GetCommandBuffer();
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// TODO(yuriks): The kernel should be the one handling this as part of translation after
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// everything else is migrated
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Kernel::HLERequestContext context;
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context.cmd_buf = cmd_buf;
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context.session = std::move(server_session);
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u32 header_code = cmd_buf[0];
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auto itr = handlers.find(header_code);
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const FunctionInfoBase* info = itr == handlers.end() ? nullptr : &itr->second;
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@ -173,9 +170,26 @@ void ServiceFrameworkBase::HandleSyncRequest(SharedPtr<ServerSession> server_ses
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return ReportUnimplementedFunction(cmd_buf, info);
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}
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// TODO(yuriks): The kernel should be the one handling this as part of translation after
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// everything else is migrated
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IPC::Header request_header{cmd_buf[0]};
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size_t request_size =
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1 + request_header.normal_params_size + request_header.translate_params_size;
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ASSERT(request_size <= IPC::COMMAND_BUFFER_LENGTH); // TODO(yuriks): Return error
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Kernel::HLERequestContext context;
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std::copy_n(cmd_buf, request_size, context.cmd_buf.begin());
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context.session = std::move(server_session);
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LOG_TRACE(Service, "%s",
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MakeFunctionString(info->name, GetServiceName().c_str(), cmd_buf).c_str());
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handler_invoker(this, info->handler_callback, context);
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IPC::Header response_header{context.cmd_buf[0]};
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size_t response_size =
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1 + response_header.normal_params_size + response_header.translate_params_size;
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ASSERT(response_size <= IPC::COMMAND_BUFFER_LENGTH);
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std::copy_n(context.cmd_buf.begin(), response_size, cmd_buf);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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