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https://github.com/yuzu-emu/yuzu.git
synced 2024-08-24 06:17:19 +02:00
service: jit: document and clean up
This commit is contained in:
parent
7f77aafe41
commit
64e93dc959
@ -21,9 +21,10 @@ struct CodeRange {
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class IJitEnvironment final : public ServiceFramework<IJitEnvironment> {
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public:
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explicit IJitEnvironment(Core::System& system_, CodeRange user_rx, CodeRange user_ro)
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explicit IJitEnvironment(Core::System& system_, Kernel::KProcess& process_, CodeRange user_rx,
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CodeRange user_ro)
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: ServiceFramework{system_, "IJitEnvironment", ServiceThreadType::CreateNew},
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context{system_.Memory()} {
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process{&process_}, context{system_.Memory()} {
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// clang-format off
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static const FunctionInfo functions[] = {
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{0, &IJitEnvironment::GenerateCode, "GenerateCode"},
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@ -43,54 +44,80 @@ public:
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}
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void GenerateCode(Kernel::HLERequestContext& ctx) {
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struct Parameters {
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LOG_DEBUG(Service_JIT, "called");
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struct InputParameters {
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u32 data_size;
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u64 command;
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CodeRange cr1;
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CodeRange cr2;
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std::array<CodeRange, 2> ranges;
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Struct32 data;
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};
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struct OutputParameters {
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s32 return_value;
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std::array<CodeRange, 2> ranges;
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};
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IPC::RequestParser rp{ctx};
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const auto parameters{rp.PopRaw<Parameters>()};
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const auto parameters{rp.PopRaw<InputParameters>()};
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// Optional input/output buffers
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std::vector<u8> input_buffer{ctx.CanReadBuffer() ? ctx.ReadBuffer() : std::vector<u8>()};
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std::vector<u8> output_buffer(ctx.CanWriteBuffer() ? ctx.GetWriteBufferSize() : 0);
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const VAddr return_ptr{context.AddHeap(0u)};
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const VAddr cr1_in_ptr{context.AddHeap(parameters.cr1)};
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const VAddr cr2_in_ptr{context.AddHeap(parameters.cr2)};
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const VAddr cr1_out_ptr{
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context.AddHeap(CodeRange{.offset = parameters.cr1.offset, .size = 0})};
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const VAddr cr2_out_ptr{
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context.AddHeap(CodeRange{.offset = parameters.cr2.offset, .size = 0})};
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// Function call prototype:
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// void GenerateCode(s32* ret, CodeRange* c0_out, CodeRange* c1_out, JITConfiguration* cfg,
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// u64 cmd, u8* input_buf, size_t input_size, CodeRange* c0_in,
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// CodeRange* c1_in, Struct32* data, size_t data_size, u8* output_buf,
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// size_t output_size);
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//
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// The command argument is used to control the behavior of the plugin during code
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// generation. The configuration allows the plugin to access the output code ranges, and the
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// other arguments are used to transfer state between the game and the plugin.
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const VAddr ret_ptr{context.AddHeap(0u)};
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const VAddr c0_in_ptr{context.AddHeap(parameters.ranges[0])};
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const VAddr c1_in_ptr{context.AddHeap(parameters.ranges[1])};
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const VAddr c0_out_ptr{context.AddHeap(ClearSize(parameters.ranges[0]))};
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const VAddr c1_out_ptr{context.AddHeap(ClearSize(parameters.ranges[1]))};
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const VAddr input_ptr{context.AddHeap(input_buffer.data(), input_buffer.size())};
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const VAddr output_ptr{context.AddHeap(output_buffer.data(), output_buffer.size())};
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const VAddr data_ptr{context.AddHeap(parameters.data)};
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const VAddr configuration_ptr{context.AddHeap(configuration)};
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context.CallFunction(callbacks.GenerateCode, return_ptr, cr1_out_ptr, cr2_out_ptr,
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// The callback does not directly return a value, it only writes to the output pointer
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context.CallFunction(callbacks.GenerateCode, ret_ptr, c0_out_ptr, c1_out_ptr,
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configuration_ptr, parameters.command, input_ptr, input_buffer.size(),
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cr1_in_ptr, cr2_in_ptr, data_ptr, parameters.data_size, output_ptr,
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c0_in_ptr, c1_in_ptr, data_ptr, parameters.data_size, output_ptr,
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output_buffer.size());
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const s32 return_value{context.GetHeap<s32>(return_ptr)};
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const s32 return_value{context.GetHeap<s32>(ret_ptr)};
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if (return_value == 0) {
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// The callback has written to the output executable code range,
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// requiring an instruction cache invalidation
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system.InvalidateCpuInstructionCacheRange(configuration.user_rx_memory.offset,
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configuration.user_rx_memory.size);
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// Write back to the IPC output buffer, if provided
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if (ctx.CanWriteBuffer()) {
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context.GetHeap(output_ptr, output_buffer.data(), output_buffer.size());
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ctx.WriteBuffer(output_buffer.data(), output_buffer.size());
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}
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const auto cr1_out{context.GetHeap<CodeRange>(cr1_out_ptr)};
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const auto cr2_out{context.GetHeap<CodeRange>(cr2_out_ptr)};
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const OutputParameters out{
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.return_value = return_value,
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.ranges =
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{
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context.GetHeap<CodeRange>(c0_out_ptr),
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context.GetHeap<CodeRange>(c1_out_ptr),
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},
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};
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IPC::ResponseBuilder rb{ctx, 8};
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rb.Push(ResultSuccess);
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rb.Push<u64>(return_value);
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rb.PushRaw(cr1_out);
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rb.PushRaw(cr2_out);
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rb.PushRaw(out);
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} else {
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LOG_WARNING(Service_JIT, "plugin GenerateCode callback failed");
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IPC::ResponseBuilder rb{ctx, 2};
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@ -99,25 +126,40 @@ public:
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};
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void Control(Kernel::HLERequestContext& ctx) {
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LOG_DEBUG(Service_JIT, "called");
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IPC::RequestParser rp{ctx};
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const auto command{rp.PopRaw<u64>()};
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const auto input_buffer{ctx.ReadBuffer()};
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// Optional input/output buffers
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std::vector<u8> input_buffer{ctx.CanReadBuffer() ? ctx.ReadBuffer() : std::vector<u8>()};
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std::vector<u8> output_buffer(ctx.CanWriteBuffer() ? ctx.GetWriteBufferSize() : 0);
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const VAddr return_ptr{context.AddHeap(0u)};
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// Function call prototype:
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// u64 Control(s32* ret, JITConfiguration* cfg, u64 cmd, u8* input_buf, size_t input_size,
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// u8* output_buf, size_t output_size);
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//
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// This function is used to set up the state of the plugin before code generation, generally
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// passing objects like pointers to VM state from the game. It is usually called once.
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const VAddr ret_ptr{context.AddHeap(0u)};
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const VAddr configuration_ptr{context.AddHeap(configuration)};
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const VAddr input_ptr{context.AddHeap(input_buffer.data(), input_buffer.size())};
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const VAddr output_ptr{context.AddHeap(output_buffer.data(), output_buffer.size())};
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const u64 wrapper_value{
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context.CallFunction(callbacks.Control, return_ptr, configuration_ptr, command,
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input_ptr, input_buffer.size(), output_ptr, output_buffer.size())};
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const s32 return_value{context.GetHeap<s32>(return_ptr)};
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const u64 wrapper_value{context.CallFunction(callbacks.Control, ret_ptr, configuration_ptr,
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command, input_ptr, input_buffer.size(),
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output_ptr, output_buffer.size())};
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const s32 return_value{context.GetHeap<s32>(ret_ptr)};
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if (wrapper_value == 0 && return_value == 0) {
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// Write back to the IPC output buffer, if provided
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if (ctx.CanWriteBuffer()) {
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context.GetHeap(output_ptr, output_buffer.data(), output_buffer.size());
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ctx.WriteBuffer(output_buffer.data(), output_buffer.size());
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}
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IPC::ResponseBuilder rb{ctx, 3};
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rb.Push(ResultSuccess);
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rb.Push(return_value);
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@ -129,8 +171,13 @@ public:
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}
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void LoadPlugin(Kernel::HLERequestContext& ctx) {
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LOG_DEBUG(Service_JIT, "called");
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IPC::RequestParser rp{ctx};
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const auto tmem_size{rp.PopRaw<u64>()};
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const auto tmem_handle{ctx.GetCopyHandle(0)};
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const auto nro_plugin{ctx.ReadBuffer(1)};
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if (tmem_size == 0) {
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LOG_ERROR(Service_JIT, "attempted to load plugin with empty transfer memory");
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IPC::ResponseBuilder rb{ctx, 2};
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@ -138,9 +185,7 @@ public:
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return;
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}
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const auto tmem_handle{ctx.GetCopyHandle(0)};
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auto tmem{system.CurrentProcess()->GetHandleTable().GetObject<Kernel::KTransferMemory>(
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tmem_handle)};
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auto tmem{process->GetHandleTable().GetObject<Kernel::KTransferMemory>(tmem_handle)};
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if (tmem.IsNull()) {
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LOG_ERROR(Service_JIT, "attempted to load plugin with invalid transfer memory handle");
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IPC::ResponseBuilder rb{ctx, 2};
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@ -148,24 +193,24 @@ public:
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return;
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}
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configuration.work_memory.offset = tmem->GetSourceAddress();
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configuration.work_memory.size = tmem_size;
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// Set up the configuration with the required TransferMemory address
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configuration.transfer_memory.offset = tmem->GetSourceAddress();
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configuration.transfer_memory.size = tmem_size;
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const auto nro_plugin{ctx.ReadBuffer(1)};
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// Gather up all the callbacks from the loaded plugin
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auto symbols{Core::Symbols::GetSymbols(nro_plugin, true)};
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const auto GetSymbol{[&](std::string name) { return symbols[name].first; }};
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const auto GetSymbol{[&](const std::string& name) { return symbols[name].first; }};
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callbacks =
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GuestCallbacks{.rtld_fini = GetSymbol("_fini"),
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.rtld_init = GetSymbol("_init"),
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.Control = GetSymbol("nnjitpluginControl"),
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.ResolveBasicSymbols = GetSymbol("nnjitpluginResolveBasicSymbols"),
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.SetupDiagnostics = GetSymbol("nnjitpluginSetupDiagnostics"),
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.Configure = GetSymbol("nnjitpluginConfigure"),
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.GenerateCode = GetSymbol("nnjitpluginGenerateCode"),
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.GetVersion = GetSymbol("nnjitpluginGetVersion"),
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.Keeper = GetSymbol("nnjitpluginKeeper"),
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.OnPrepared = GetSymbol("nnjitpluginOnPrepared")};
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callbacks.rtld_fini = GetSymbol("_fini");
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callbacks.rtld_init = GetSymbol("_init");
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callbacks.Control = GetSymbol("nnjitpluginControl");
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callbacks.ResolveBasicSymbols = GetSymbol("nnjitpluginResolveBasicSymbols");
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callbacks.SetupDiagnostics = GetSymbol("nnjitpluginSetupDiagnostics");
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callbacks.Configure = GetSymbol("nnjitpluginConfigure");
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callbacks.GenerateCode = GetSymbol("nnjitpluginGenerateCode");
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callbacks.GetVersion = GetSymbol("nnjitpluginGetVersion");
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callbacks.OnPrepared = GetSymbol("nnjitpluginOnPrepared");
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callbacks.Keeper = GetSymbol("nnjitpluginKeeper");
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if (callbacks.GetVersion == 0 || callbacks.Configure == 0 || callbacks.GenerateCode == 0 ||
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callbacks.OnPrepared == 0) {
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@ -186,12 +231,16 @@ public:
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configuration.sys_ro_memory.size);
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context.MapProcessMemory(configuration.sys_rx_memory.offset,
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configuration.sys_rx_memory.size);
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context.MapProcessMemory(configuration.work_memory.offset, configuration.work_memory.size);
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context.MapProcessMemory(configuration.transfer_memory.offset,
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configuration.transfer_memory.size);
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// Run ELF constructors, if needed
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if (callbacks.rtld_init != 0) {
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context.CallFunction(callbacks.rtld_init);
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}
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// Function prototype:
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// u64 GetVersion();
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const auto version{context.CallFunction(callbacks.GetVersion)};
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if (version != 1) {
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LOG_ERROR(Service_JIT, "unknown plugin version {}", version);
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@ -200,16 +249,26 @@ public:
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return;
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}
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// Function prototype:
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// void ResolveBasicSymbols(void (*resolver)(const char* name));
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const auto resolve{context.GetHelper("_resolve")};
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if (callbacks.ResolveBasicSymbols != 0) {
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context.CallFunction(callbacks.ResolveBasicSymbols, resolve);
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}
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// Function prototype:
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// void SetupDiagnostics(u32 enabled, void (**resolver)(const char* name));
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const auto resolve_ptr{context.AddHeap(resolve)};
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if (callbacks.SetupDiagnostics != 0) {
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context.CallFunction(callbacks.SetupDiagnostics, 0u, resolve_ptr);
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}
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context.CallFunction(callbacks.Configure, 0u);
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// Function prototype:
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// void Configure(u32* memory_flags);
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context.CallFunction(callbacks.Configure, 0ull);
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// Function prototype:
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// void OnPrepared(JITConfiguration* cfg);
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const auto configuration_ptr{context.AddHeap(configuration)};
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context.CallFunction(callbacks.OnPrepared, configuration_ptr);
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@ -218,6 +277,8 @@ public:
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}
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void GetCodeAddress(Kernel::HLERequestContext& ctx) {
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LOG_DEBUG(Service_JIT, "called");
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IPC::ResponseBuilder rb{ctx, 6};
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rb.Push(ResultSuccess);
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rb.Push(configuration.user_rx_memory.offset);
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@ -243,11 +304,17 @@ private:
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struct JITConfiguration {
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CodeRange user_rx_memory;
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CodeRange user_ro_memory;
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CodeRange work_memory;
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CodeRange transfer_memory;
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CodeRange sys_rx_memory;
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CodeRange sys_ro_memory;
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};
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static CodeRange ClearSize(CodeRange in) {
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in.size = 0;
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return in;
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}
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Kernel::KScopedAutoObject<Kernel::KProcess> process;
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GuestCallbacks callbacks;
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JITConfiguration configuration;
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JITContext context;
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@ -275,8 +342,9 @@ public:
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IPC::RequestParser rp{ctx};
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const auto parameters{rp.PopRaw<Parameters>()};
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const auto executable_mem_handle{ctx.GetCopyHandle(1)};
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const auto readable_mem_handle{ctx.GetCopyHandle(2)};
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const auto process_handle{ctx.GetCopyHandle(0)};
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const auto rx_mem_handle{ctx.GetCopyHandle(1)};
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const auto ro_mem_handle{ctx.GetCopyHandle(2)};
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if (parameters.rx_size == 0 || parameters.ro_size == 0) {
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LOG_ERROR(Service_JIT, "attempted to init with empty code regions");
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@ -285,42 +353,47 @@ public:
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return;
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}
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// The copy handle at index 0 is the process handle, but handle tables are
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// per-process, so there is no point reading it here until we are multiprocess
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const auto& process{*system.CurrentProcess()};
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// Fetch using the handle table for the current process here,
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// since we are not multiprocess yet.
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const auto& handle_table{system.CurrentProcess()->GetHandleTable()};
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auto executable_mem{
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process.GetHandleTable().GetObject<Kernel::KCodeMemory>(executable_mem_handle)};
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if (executable_mem.IsNull()) {
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LOG_ERROR(Service_JIT, "executable_mem is null for handle=0x{:08X}",
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executable_mem_handle);
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auto process{handle_table.GetObject<Kernel::KProcess>(process_handle)};
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if (process.IsNull()) {
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LOG_ERROR(Service_JIT, "process is null for handle=0x{:08X}", process_handle);
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IPC::ResponseBuilder rb{ctx, 2};
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rb.Push(ResultUnknown);
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return;
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}
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auto readable_mem{
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process.GetHandleTable().GetObject<Kernel::KCodeMemory>(readable_mem_handle)};
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if (readable_mem.IsNull()) {
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LOG_ERROR(Service_JIT, "readable_mem is null for handle=0x{:08X}", readable_mem_handle);
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auto rx_mem{handle_table.GetObject<Kernel::KCodeMemory>(rx_mem_handle)};
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if (rx_mem.IsNull()) {
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LOG_ERROR(Service_JIT, "rx_mem is null for handle=0x{:08X}", rx_mem_handle);
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IPC::ResponseBuilder rb{ctx, 2};
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rb.Push(ResultUnknown);
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return;
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}
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auto ro_mem{handle_table.GetObject<Kernel::KCodeMemory>(ro_mem_handle)};
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if (ro_mem.IsNull()) {
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LOG_ERROR(Service_JIT, "ro_mem is null for handle=0x{:08X}", ro_mem_handle);
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IPC::ResponseBuilder rb{ctx, 2};
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rb.Push(ResultUnknown);
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return;
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}
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const CodeRange user_rx{
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.offset = executable_mem->GetSourceAddress(),
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.offset = rx_mem->GetSourceAddress(),
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.size = parameters.rx_size,
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};
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const CodeRange user_ro{
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.offset = readable_mem->GetSourceAddress(),
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.offset = ro_mem->GetSourceAddress(),
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.size = parameters.ro_size,
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};
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IPC::ResponseBuilder rb{ctx, 2, 0, 1};
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rb.Push(ResultSuccess);
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rb.PushIpcInterface<IJitEnvironment>(system, user_rx, user_ro);
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rb.PushIpcInterface<IJitEnvironment>(system, *process, user_rx, user_ro);
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}
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};
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@ -17,61 +17,15 @@
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namespace Service::JIT {
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constexpr std::array<u8, 4> STOP_ARM64 = {
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constexpr std::array<u8, 8> SVC0_ARM64 = {
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0x01, 0x00, 0x00, 0xd4, // svc #0
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};
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constexpr std::array<u8, 8> RESOLVE_ARM64 = {
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0x21, 0x00, 0x00, 0xd4, // svc #1
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0xc0, 0x03, 0x5f, 0xd6, // ret
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};
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constexpr std::array<u8, 4> PANIC_ARM64 = {
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0x41, 0x00, 0x00, 0xd4, // svc #2
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constexpr std::array HELPER_FUNCTIONS{
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"_stop", "_resolve", "_panic", "memcpy", "memmove", "memset",
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};
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constexpr std::array<u8, 60> MEMMOVE_ARM64 = {
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0x1f, 0x00, 0x01, 0xeb, // cmp x0, x1
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0x83, 0x01, 0x00, 0x54, // b.lo #+34
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0x42, 0x04, 0x00, 0xd1, // sub x2, x2, 1
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0x22, 0x01, 0xf8, 0xb7, // tbnz x2, #63, #+36
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0x23, 0x68, 0x62, 0x38, // ldrb w3, [x1, x2]
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0x03, 0x68, 0x22, 0x38, // strb w3, [x0, x2]
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0xfc, 0xff, 0xff, 0x17, // b #-16
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0x24, 0x68, 0x63, 0x38, // ldrb w4, [x1, x3]
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0x04, 0x68, 0x23, 0x38, // strb w4, [x0, x3]
|
||||
0x63, 0x04, 0x00, 0x91, // add x3, x3, 1
|
||||
0x7f, 0x00, 0x02, 0xeb, // cmp x3, x2
|
||||
0x8b, 0xff, 0xff, 0x54, // b.lt #-16
|
||||
0xc0, 0x03, 0x5f, 0xd6, // ret
|
||||
0x03, 0x00, 0x80, 0xd2, // mov x3, 0
|
||||
0xfc, 0xff, 0xff, 0x17, // b #-16
|
||||
};
|
||||
|
||||
constexpr std::array<u8, 28> MEMSET_ARM64 = {
|
||||
0x03, 0x00, 0x80, 0xd2, // mov x3, 0
|
||||
0x7f, 0x00, 0x02, 0xeb, // cmp x3, x2
|
||||
0x4b, 0x00, 0x00, 0x54, // b.lt #+8
|
||||
0xc0, 0x03, 0x5f, 0xd6, // ret
|
||||
0x01, 0x68, 0x23, 0x38, // strb w1, [x0, x3]
|
||||
0x63, 0x04, 0x00, 0x91, // add x3, x3, 1
|
||||
0xfb, 0xff, 0xff, 0x17, // b #-20
|
||||
};
|
||||
|
||||
struct HelperFunction {
|
||||
const char* name;
|
||||
const std::span<const u8> data;
|
||||
};
|
||||
|
||||
constexpr std::array<HelperFunction, 6> HELPER_FUNCTIONS{{
|
||||
{"_stop", STOP_ARM64},
|
||||
{"_resolve", RESOLVE_ARM64},
|
||||
{"_panic", PANIC_ARM64},
|
||||
{"memcpy", MEMMOVE_ARM64},
|
||||
{"memmove", MEMMOVE_ARM64},
|
||||
{"memset", MEMSET_ARM64},
|
||||
}};
|
||||
|
||||
struct Elf64_Dyn {
|
||||
u64 d_tag;
|
||||
u64 d_un;
|
||||
@ -224,17 +178,24 @@ public:
|
||||
InsertHelperFunctions();
|
||||
InsertStack();
|
||||
return true;
|
||||
} else {
|
||||
return false;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
bool FixupRelocations() {
|
||||
// The loaded NRO file has ELF relocations that must be processed before it can run.
|
||||
// Normally this would be processed by RTLD, but in HLE context, we don't have
|
||||
// the linker available, so we have to do it ourselves.
|
||||
|
||||
const VAddr mod_offset{callbacks->MemoryRead32(4)};
|
||||
if (callbacks->MemoryRead32(mod_offset) != Common::MakeMagic('M', 'O', 'D', '0')) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// For more info about dynamic entries, see the ELF ABI specification:
|
||||
// https://refspecs.linuxbase.org/elf/gabi4+/ch5.dynamic.html
|
||||
// https://refspecs.linuxbase.org/elf/gabi4+/ch4.reloc.html
|
||||
VAddr dynamic_offset{mod_offset + callbacks->MemoryRead32(mod_offset + 4)};
|
||||
VAddr rela_dyn = 0;
|
||||
size_t num_rela = 0;
|
||||
@ -266,13 +227,15 @@ public:
|
||||
}
|
||||
|
||||
void InsertHelperFunctions() {
|
||||
for (const auto& [name, contents] : HELPER_FUNCTIONS) {
|
||||
for (const auto& name : HELPER_FUNCTIONS) {
|
||||
helpers[name] = local_memory.size();
|
||||
local_memory.insert(local_memory.end(), contents.begin(), contents.end());
|
||||
local_memory.insert(local_memory.end(), SVC0_ARM64.begin(), SVC0_ARM64.end());
|
||||
}
|
||||
}
|
||||
|
||||
void InsertStack() {
|
||||
// Allocate enough space to avoid any reasonable risk of
|
||||
// overflowing the stack during plugin execution
|
||||
const u64 pad_amount{Common::AlignUp(local_memory.size(), STACK_ALIGN) -
|
||||
local_memory.size()};
|
||||
local_memory.insert(local_memory.end(), 0x10000 + pad_amount, 0);
|
||||
@ -292,9 +255,21 @@ public:
|
||||
}
|
||||
|
||||
void SetupArguments() {
|
||||
// The first 8 integer registers are used for the first 8 integer
|
||||
// arguments. Floating-point arguments are not handled at this time.
|
||||
//
|
||||
// If a function takes more than 8 arguments, then stack space is reserved
|
||||
// for the remaining arguments, and the remaining arguments are inserted in
|
||||
// ascending memory order, each argument aligned to an 8-byte boundary. The
|
||||
// stack pointer must remain aligned to 16 bytes.
|
||||
//
|
||||
// For more info, see the AArch64 ABI PCS:
|
||||
// https://github.com/ARM-software/abi-aa/blob/main/aapcs64/aapcs64.rst
|
||||
|
||||
for (size_t i = 0; i < 8 && i < argument_stack.size(); i++) {
|
||||
jit->SetRegister(i, argument_stack[i]);
|
||||
}
|
||||
|
||||
if (argument_stack.size() > 8) {
|
||||
const VAddr new_sp = Common::AlignDown(
|
||||
top_of_stack - (argument_stack.size() - 8) * sizeof(u64), STACK_ALIGN);
|
||||
@ -303,6 +278,8 @@ public:
|
||||
}
|
||||
jit->SetSP(new_sp);
|
||||
}
|
||||
|
||||
// Reset the call state for the next invocation
|
||||
argument_stack.clear();
|
||||
heap_pointer = top_of_stack;
|
||||
}
|
||||
@ -322,11 +299,16 @@ public:
|
||||
}
|
||||
|
||||
VAddr AddHeap(const void* data, size_t size) {
|
||||
// Require all heap data types to have the same alignment as the
|
||||
// stack pointer, for compatibility
|
||||
const size_t num_bytes{Common::AlignUp(size, STACK_ALIGN)};
|
||||
|
||||
// Make additional memory space if required
|
||||
if (heap_pointer + num_bytes > local_memory.size()) {
|
||||
local_memory.insert(local_memory.end(),
|
||||
(heap_pointer + num_bytes) - local_memory.size(), 0);
|
||||
}
|
||||
|
||||
const VAddr location{heap_pointer};
|
||||
std::memcpy(local_memory.data() + location, data, size);
|
||||
heap_pointer += num_bytes;
|
||||
@ -350,30 +332,67 @@ public:
|
||||
};
|
||||
|
||||
void DynarmicCallbacks64::CallSVC(u32 swi) {
|
||||
switch (swi) {
|
||||
case 0:
|
||||
parent.jit->HaltExecution();
|
||||
break;
|
||||
// Service calls are used to implement helper functionality.
|
||||
//
|
||||
// The most important of these is the _stop helper, which transfers control
|
||||
// from the plugin back to HLE context to return a value. However, a few more
|
||||
// are also implemented to reduce the need for direct ARM implementations of
|
||||
// basic functionality, like memory operations.
|
||||
//
|
||||
// When we receive a helper request, the swi number will be zero, and the call
|
||||
// will have originated from an address we know is a helper function. Otherwise,
|
||||
// the plugin may be trying to issue a service call, which we shouldn't handle.
|
||||
|
||||
case 1: {
|
||||
if (swi != 0) {
|
||||
LOG_CRITICAL(Service_JIT, "plugin issued unknown service call {}", swi);
|
||||
parent.jit->HaltExecution();
|
||||
return;
|
||||
}
|
||||
|
||||
u64 pc{parent.jit->GetPC() - 4};
|
||||
auto& helpers{parent.helpers};
|
||||
|
||||
if (pc == helpers["memcpy"] || pc == helpers["memmove"]) {
|
||||
const VAddr dest{parent.jit->GetRegister(0)};
|
||||
const VAddr src{parent.jit->GetRegister(1)};
|
||||
const size_t n{parent.jit->GetRegister(2)};
|
||||
|
||||
if (dest < src) {
|
||||
for (size_t i = 0; i < n; i++) {
|
||||
MemoryWrite8(dest + i, MemoryRead8(src + i));
|
||||
}
|
||||
} else {
|
||||
for (size_t i = n; i > 0; i--) {
|
||||
MemoryWrite8(dest + i - 1, MemoryRead8(src + i - 1));
|
||||
}
|
||||
}
|
||||
} else if (pc == helpers["memset"]) {
|
||||
const VAddr dest{parent.jit->GetRegister(0)};
|
||||
const u64 c{parent.jit->GetRegister(1)};
|
||||
const size_t n{parent.jit->GetRegister(2)};
|
||||
|
||||
for (size_t i = 0; i < n; i++) {
|
||||
MemoryWrite8(dest + i, static_cast<u8>(c));
|
||||
}
|
||||
} else if (pc == helpers["_resolve"]) {
|
||||
// X0 contains a char* for a symbol to resolve
|
||||
std::string name{MemoryReadCString(parent.jit->GetRegister(0))};
|
||||
const auto helper{parent.helpers[name]};
|
||||
const auto name{MemoryReadCString(parent.jit->GetRegister(0))};
|
||||
const auto helper{helpers[name]};
|
||||
|
||||
if (helper != 0) {
|
||||
parent.jit->SetRegister(0, helper);
|
||||
} else {
|
||||
LOG_WARNING(Service_JIT, "plugin requested unknown function {}", name);
|
||||
parent.jit->SetRegister(0, parent.helpers["_panic"]);
|
||||
parent.jit->SetRegister(0, helpers["_panic"]);
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
case 2:
|
||||
default:
|
||||
} else if (pc == helpers["_stop"]) {
|
||||
parent.jit->HaltExecution();
|
||||
} else if (pc == helpers["_panic"]) {
|
||||
LOG_CRITICAL(Service_JIT, "plugin panicked!");
|
||||
parent.jit->HaltExecution();
|
||||
break;
|
||||
} else {
|
||||
LOG_CRITICAL(Service_JIT, "plugin issued syscall at unknown address 0x{:x}", pc);
|
||||
parent.jit->HaltExecution();
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -28,6 +28,7 @@ public:
|
||||
template <typename T, typename... Ts>
|
||||
u64 CallFunction(VAddr func, T argument, Ts... rest) {
|
||||
static_assert(std::is_trivially_copyable_v<T>);
|
||||
static_assert(!std::is_floating_point_v<T>);
|
||||
PushArgument(&argument, sizeof(argument));
|
||||
|
||||
if constexpr (sizeof...(rest) > 0) {
|
||||
|
Loading…
Reference in New Issue
Block a user