c9c1ba0952
The real kernel requires services to set up their static buffer targets ahead of time. This implementation does not require that and will simply create the storage for the buffers as they are processed in the incoming IPC request. Static buffers are kept in an unordered_map keyed by their buffer id, and are written into the already-setup area of the request thread when responding an IPC request. This fixes a regression (crash) introduced in #2992. This PR introduces more warnings due to the [[deprecated]] attribute being added to void PushStaticBuffer(VAddr buffer_vaddr, size_t size, u8 buffer_id); and VAddr PopStaticBuffer(size_t* data_size);
501 lines
17 KiB
C++
501 lines
17 KiB
C++
// Copyright 2016 Citra Emulator Project
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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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#pragma once
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#include <array>
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#include <tuple>
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#include <type_traits>
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#include <utility>
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#include <vector>
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#include "core/hle/ipc.h"
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#include "core/hle/kernel/handle_table.h"
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#include "core/hle/kernel/hle_ipc.h"
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#include "core/hle/kernel/kernel.h"
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namespace IPC {
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class RequestHelperBase {
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protected:
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Kernel::HLERequestContext* context = nullptr;
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u32* cmdbuf;
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ptrdiff_t index = 1;
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Header header;
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public:
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RequestHelperBase(Kernel::HLERequestContext& context, Header desired_header)
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: context(&context), cmdbuf(context.CommandBuffer()), header(desired_header) {}
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RequestHelperBase(u32* command_buffer, Header command_header)
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: cmdbuf(command_buffer), header(command_header) {}
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/// Returns the total size of the request in words
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size_t TotalSize() const {
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return 1 /* command header */ + header.normal_params_size + header.translate_params_size;
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}
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void ValidateHeader() {
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DEBUG_ASSERT_MSG(index == TotalSize(), "Operations do not match the header (cmd 0x%x)",
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header.raw);
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}
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void Skip(unsigned size_in_words, bool set_to_null) {
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if (set_to_null)
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memset(cmdbuf + index, 0, size_in_words * sizeof(u32));
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index += size_in_words;
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}
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/**
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* @brief Retrieves the address of a static buffer, used when a buffer is needed for output
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* @param buffer_id The index of the static buffer
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* @param data_size If non-null, will store the size of the buffer
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*/
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VAddr PeekStaticBuffer(u8 buffer_id, size_t* data_size = nullptr) const {
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u32* static_buffer = cmdbuf + Kernel::kStaticBuffersOffset / sizeof(u32) + buffer_id * 2;
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if (data_size)
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*data_size = StaticBufferDescInfo{static_buffer[0]}.size;
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return static_buffer[1];
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}
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};
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class RequestBuilder : public RequestHelperBase {
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public:
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RequestBuilder(Kernel::HLERequestContext& context, Header command_header)
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: RequestHelperBase(context, command_header) {
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// From this point we will start overwriting the existing command buffer, so it's safe to
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// release all previous incoming Object pointers since they won't be usable anymore.
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context.ClearIncomingObjects();
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cmdbuf[0] = header.raw;
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}
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RequestBuilder(Kernel::HLERequestContext& context, u16 command_id, unsigned normal_params_size,
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unsigned translate_params_size)
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: RequestBuilder(
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context, Header{MakeHeader(command_id, normal_params_size, translate_params_size)}) {}
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RequestBuilder(u32* command_buffer, Header command_header)
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: RequestHelperBase(command_buffer, command_header) {
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cmdbuf[0] = header.raw;
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}
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explicit RequestBuilder(u32* command_buffer, u32 command_header)
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: RequestBuilder(command_buffer, Header{command_header}) {}
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RequestBuilder(u32* command_buffer, u16 command_id, unsigned normal_params_size,
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unsigned translate_params_size)
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: RequestBuilder(command_buffer,
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MakeHeader(command_id, normal_params_size, translate_params_size)) {}
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// Validate on destruction, as there shouldn't be any case where we don't want it
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~RequestBuilder() {
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ValidateHeader();
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}
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template <typename T>
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void Push(T value);
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template <typename First, typename... Other>
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void Push(const First& first_value, const Other&... other_values);
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/**
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* @brief Copies the content of the given trivially copyable class to the buffer as a normal
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* param
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* @note: The input class must be correctly packed/padded to fit hardware layout.
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*/
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template <typename T>
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void PushRaw(const T& value);
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// TODO : ensure that translate params are added after all regular params
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template <typename... H>
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void PushCopyHandles(H... handles);
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template <typename... H>
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void PushMoveHandles(H... handles);
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template <typename... O>
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void PushObjects(Kernel::SharedPtr<O>... pointers);
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void PushCurrentPIDHandle();
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[[deprecated]] void PushStaticBuffer(VAddr buffer_vaddr, size_t size, u8 buffer_id);
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void PushStaticBuffer(const std::vector<u8>& buffer, u8 buffer_id);
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void PushMappedBuffer(VAddr buffer_vaddr, size_t size, MappedBufferPermissions perms);
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};
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/// Push ///
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template <>
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inline void RequestBuilder::Push(u32 value) {
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cmdbuf[index++] = value;
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}
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template <typename T>
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void RequestBuilder::PushRaw(const T& value) {
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static_assert(std::is_trivially_copyable<T>(), "Raw types should be trivially copyable");
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std::memcpy(cmdbuf + index, &value, sizeof(T));
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index += (sizeof(T) + 3) / 4; // round up to word length
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}
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template <>
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inline void RequestBuilder::Push(u8 value) {
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PushRaw(value);
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}
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template <>
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inline void RequestBuilder::Push(u16 value) {
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PushRaw(value);
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}
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template <>
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inline void RequestBuilder::Push(u64 value) {
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Push(static_cast<u32>(value));
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Push(static_cast<u32>(value >> 32));
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}
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template <>
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inline void RequestBuilder::Push(bool value) {
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Push(static_cast<u8>(value));
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}
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template <>
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inline void RequestBuilder::Push(ResultCode value) {
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Push(value.raw);
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}
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template <typename First, typename... Other>
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void RequestBuilder::Push(const First& first_value, const Other&... other_values) {
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Push(first_value);
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Push(other_values...);
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}
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template <typename... H>
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inline void RequestBuilder::PushCopyHandles(H... handles) {
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Push(CopyHandleDesc(sizeof...(H)));
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Push(static_cast<Kernel::Handle>(handles)...);
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}
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template <typename... H>
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inline void RequestBuilder::PushMoveHandles(H... handles) {
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Push(MoveHandleDesc(sizeof...(H)));
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Push(static_cast<Kernel::Handle>(handles)...);
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}
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template <typename... O>
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inline void RequestBuilder::PushObjects(Kernel::SharedPtr<O>... pointers) {
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PushMoveHandles(context->AddOutgoingHandle(std::move(pointers))...);
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}
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inline void RequestBuilder::PushCurrentPIDHandle() {
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Push(CallingPidDesc());
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Push(u32(0));
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}
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inline void RequestBuilder::PushStaticBuffer(VAddr buffer_vaddr, size_t size, u8 buffer_id) {
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Push(StaticBufferDesc(size, buffer_id));
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Push(buffer_vaddr);
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}
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inline void RequestBuilder::PushStaticBuffer(const std::vector<u8>& buffer, u8 buffer_id) {
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ASSERT_MSG(buffer_id < MAX_STATIC_BUFFERS, "Invalid static buffer id");
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Push(StaticBufferDesc(buffer.size(), buffer_id));
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// This address will be replaced by the correct static buffer address during IPC translation.
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Push<VAddr>(0xDEADC0DE);
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context->AddStaticBuffer(buffer_id, buffer);
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}
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inline void RequestBuilder::PushMappedBuffer(VAddr buffer_vaddr, size_t size,
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MappedBufferPermissions perms) {
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Push(MappedBufferDesc(size, perms));
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Push(buffer_vaddr);
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}
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class RequestParser : public RequestHelperBase {
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public:
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RequestParser(Kernel::HLERequestContext& context, Header desired_header)
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: RequestHelperBase(context, desired_header) {}
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RequestParser(Kernel::HLERequestContext& context, u16 command_id, unsigned normal_params_size,
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unsigned translate_params_size)
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: RequestParser(context,
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Header{MakeHeader(command_id, normal_params_size, translate_params_size)}) {
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}
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RequestParser(u32* command_buffer, Header command_header)
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: RequestHelperBase(command_buffer, command_header) {}
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explicit RequestParser(u32* command_buffer, u32 command_header)
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: RequestParser(command_buffer, Header{command_header}) {}
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RequestParser(u32* command_buffer, u16 command_id, unsigned normal_params_size,
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unsigned translate_params_size)
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: RequestParser(command_buffer,
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MakeHeader(command_id, normal_params_size, translate_params_size)) {}
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RequestBuilder MakeBuilder(u32 normal_params_size, u32 translate_params_size,
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bool validateHeader = true) {
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if (validateHeader)
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ValidateHeader();
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Header builderHeader{MakeHeader(static_cast<u16>(header.command_id), normal_params_size,
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translate_params_size)};
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if (context != nullptr)
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return {*context, builderHeader};
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else
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return {cmdbuf, builderHeader};
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}
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template <typename T>
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T Pop();
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template <typename T>
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void Pop(T& value);
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template <typename First, typename... Other>
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void Pop(First& first_value, Other&... other_values);
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/// Equivalent to calling `PopHandles<1>()[0]`.
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Kernel::Handle PopHandle();
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/**
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* Pops a descriptor containing `N` handles. The handles are returned as an array. The
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* descriptor must contain exactly `N` handles, it is not permitted to, for example, call
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* PopHandles<1>() twice to read a multi-handle descriptor with 2 handles, or to make a single
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* PopHandles<2>() call to read 2 single-handle descriptors.
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*/
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template <unsigned int N>
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std::array<Kernel::Handle, N> PopHandles();
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/// Convenience wrapper around PopHandles() which assigns the handles to the passed references.
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template <typename... H>
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void PopHandles(H&... handles) {
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std::tie(handles...) = PopHandles<sizeof...(H)>();
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}
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/// Equivalent to calling `PopGenericObjects<1>()[0]`.
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Kernel::SharedPtr<Kernel::Object> PopGenericObject();
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/// Equivalent to calling `std::get<0>(PopObjects<T>())`.
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template <typename T>
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Kernel::SharedPtr<T> PopObject();
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/**
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* Pop a descriptor containing `N` handles and resolves them to Kernel::Object pointers. If a
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* handle is invalid, null is returned for that object instead. The same caveats from
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* PopHandles() apply regarding `N` matching the number of handles in the descriptor.
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*/
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template <unsigned int N>
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std::array<Kernel::SharedPtr<Kernel::Object>, N> PopGenericObjects();
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/**
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* Resolves handles to Kernel::Objects as in PopGenericsObjects(), but then also casts them to
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* the passed `T` types, while verifying that the cast is valid. If the type of an object does
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* not match, null is returned instead.
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*/
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template <typename... T>
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std::tuple<Kernel::SharedPtr<T>...> PopObjects();
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/// Convenience wrapper around PopObjects() which assigns the handles to the passed references.
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template <typename... T>
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void PopObjects(Kernel::SharedPtr<T>&... pointers) {
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std::tie(pointers...) = PopObjects<T...>();
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}
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/**
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* @brief Pops the static buffer vaddr
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* @return The virtual address of the buffer
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* @param[out] data_size If non-null, the pointed value will be set to the size of the data
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*
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* In real services, static buffers must be set up before any IPC request using those is sent.
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* It is the duty of the process (usually services) to allocate and set up the receiving static
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* buffer information. Our HLE services do not need to set up the buffers beforehand.
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* Please note that the setup uses virtual addresses.
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*/
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[[deprecated]] VAddr PopStaticBuffer(size_t* data_size);
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/**
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* @brief Pops a static buffer from the IPC request buffer.
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* @return The buffer that was copied from the IPC request originator.
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*
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* In real services, static buffers must be set up before any IPC request using those is sent.
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* It is the duty of the process (usually services) to allocate and set up the receiving static
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* buffer information. Our HLE services do not need to set up the buffers beforehand.
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*/
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const std::vector<u8>& PopStaticBuffer();
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/**
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* @brief Pops the mapped buffer vaddr
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* @return The virtual address of the buffer
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* @param[out] data_size If non-null, the pointed value will be set to the size of the data
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* given by the source process
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* @param[out] buffer_perms If non-null, the pointed value will be set to the permissions of the
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* buffer
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*/
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VAddr PopMappedBuffer(size_t* data_size = nullptr,
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MappedBufferPermissions* buffer_perms = nullptr);
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/**
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* @brief Reads the next normal parameters as a struct, by copying it
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* @note: The output class must be correctly packed/padded to fit hardware layout.
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*/
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template <typename T>
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void PopRaw(T& value);
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/**
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* @brief Reads the next normal parameters as a struct, by copying it into a new value
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* @note: The output class must be correctly packed/padded to fit hardware layout.
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*/
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template <typename T>
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T PopRaw();
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};
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/// Pop ///
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template <>
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inline u32 RequestParser::Pop() {
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return cmdbuf[index++];
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}
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template <typename T>
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void RequestParser::PopRaw(T& value) {
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static_assert(std::is_trivially_copyable<T>(), "Raw types should be trivially copyable");
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std::memcpy(&value, cmdbuf + index, sizeof(T));
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index += (sizeof(T) + 3) / 4; // round up to word length
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}
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template <typename T>
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T RequestParser::PopRaw() {
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T value;
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PopRaw(value);
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return value;
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}
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template <>
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inline u8 RequestParser::Pop() {
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return PopRaw<u8>();
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}
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template <>
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inline u16 RequestParser::Pop() {
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return PopRaw<u16>();
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}
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template <>
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inline u64 RequestParser::Pop() {
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const u64 lsw = Pop<u32>();
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const u64 msw = Pop<u32>();
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return msw << 32 | lsw;
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}
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template <>
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inline bool RequestParser::Pop() {
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return Pop<u8>() != 0;
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}
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template <>
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inline ResultCode RequestParser::Pop() {
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return ResultCode{Pop<u32>()};
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}
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template <typename T>
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void RequestParser::Pop(T& value) {
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value = Pop<T>();
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}
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template <typename First, typename... Other>
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void RequestParser::Pop(First& first_value, Other&... other_values) {
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first_value = Pop<First>();
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Pop(other_values...);
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}
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inline Kernel::Handle RequestParser::PopHandle() {
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const u32 handle_descriptor = Pop<u32>();
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DEBUG_ASSERT_MSG(IsHandleDescriptor(handle_descriptor),
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"Tried to pop handle(s) but the descriptor is not a handle descriptor");
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DEBUG_ASSERT_MSG(HandleNumberFromDesc(handle_descriptor) == 1,
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"Descriptor indicates that there isn't exactly one handle");
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return Pop<Kernel::Handle>();
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}
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template <unsigned int N>
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std::array<Kernel::Handle, N> RequestParser::PopHandles() {
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u32 handle_descriptor = Pop<u32>();
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ASSERT_MSG(IsHandleDescriptor(handle_descriptor),
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"Tried to pop handle(s) but the descriptor is not a handle descriptor");
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ASSERT_MSG(N == HandleNumberFromDesc(handle_descriptor),
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"Number of handles doesn't match the descriptor");
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std::array<Kernel::Handle, N> handles{};
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for (Kernel::Handle& handle : handles) {
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handle = Pop<Kernel::Handle>();
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}
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return handles;
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}
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inline Kernel::SharedPtr<Kernel::Object> RequestParser::PopGenericObject() {
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Kernel::Handle handle = PopHandle();
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return context->GetIncomingHandle(handle);
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}
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template <typename T>
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Kernel::SharedPtr<T> RequestParser::PopObject() {
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return Kernel::DynamicObjectCast<T>(PopGenericObject());
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}
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template <unsigned int N>
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inline std::array<Kernel::SharedPtr<Kernel::Object>, N> RequestParser::PopGenericObjects() {
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std::array<Kernel::Handle, N> handles = PopHandles<N>();
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std::array<Kernel::SharedPtr<Kernel::Object>, N> pointers;
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for (int i = 0; i < N; ++i) {
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pointers[i] = context->GetIncomingHandle(handles[i]);
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}
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return pointers;
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}
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namespace detail {
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template <typename... T, size_t... I>
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std::tuple<Kernel::SharedPtr<T>...> PopObjectsHelper(
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std::array<Kernel::SharedPtr<Kernel::Object>, sizeof...(T)>&& pointers,
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std::index_sequence<I...>) {
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return std::make_tuple(Kernel::DynamicObjectCast<T>(std::move(pointers[I]))...);
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}
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} // namespace detail
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template <typename... T>
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inline std::tuple<Kernel::SharedPtr<T>...> RequestParser::PopObjects() {
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return detail::PopObjectsHelper<T...>(PopGenericObjects<sizeof...(T)>(),
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std::index_sequence_for<T...>{});
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}
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inline VAddr RequestParser::PopStaticBuffer(size_t* data_size) {
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const u32 sbuffer_descriptor = Pop<u32>();
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StaticBufferDescInfo bufferInfo{sbuffer_descriptor};
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if (data_size != nullptr)
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*data_size = bufferInfo.size;
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return Pop<VAddr>();
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}
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inline const std::vector<u8>& RequestParser::PopStaticBuffer() {
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const u32 sbuffer_descriptor = Pop<u32>();
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// Pop the address from the incoming request buffer
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Pop<VAddr>();
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StaticBufferDescInfo buffer_info{sbuffer_descriptor};
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return context->GetStaticBuffer(buffer_info.buffer_id);
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}
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inline VAddr RequestParser::PopMappedBuffer(size_t* data_size,
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MappedBufferPermissions* buffer_perms) {
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const u32 sbuffer_descriptor = Pop<u32>();
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MappedBufferDescInfo bufferInfo{sbuffer_descriptor};
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if (data_size != nullptr)
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*data_size = bufferInfo.size;
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if (buffer_perms != nullptr)
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*buffer_perms = bufferInfo.perms;
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return Pop<VAddr>();
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}
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} // namespace IPC
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