summaryrefslogtreecommitdiffstats
path: root/src/core/hle/service/jit/jit.cpp
blob: a94d05e1970f22eb46d22b340bcf1aa097cace35 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include "core/arm/debug.h"
#include "core/arm/symbols.h"
#include "core/core.h"
#include "core/hle/kernel/k_code_memory.h"
#include "core/hle/kernel/k_transfer_memory.h"
#include "core/hle/result.h"
#include "core/hle/service/ipc_helpers.h"
#include "core/hle/service/jit/jit.h"
#include "core/hle/service/jit/jit_context.h"
#include "core/hle/service/server_manager.h"
#include "core/hle/service/service.h"
#include "core/memory.h"

namespace Service::JIT {

struct CodeRange {
    u64 offset;
    u64 size;
};

class IJitEnvironment final : public ServiceFramework<IJitEnvironment> {
public:
    explicit IJitEnvironment(Core::System& system_, Kernel::KProcess& process_, CodeRange user_rx,
                             CodeRange user_ro)
        : ServiceFramework{system_, "IJitEnvironment"}, process{&process_},
          context{process->GetMemory()} {
        // clang-format off
        static const FunctionInfo functions[] = {
            {0, &IJitEnvironment::GenerateCode, "GenerateCode"},
            {1, &IJitEnvironment::Control, "Control"},
            {1000, &IJitEnvironment::LoadPlugin, "LoadPlugin"},
            {1001, &IJitEnvironment::GetCodeAddress, "GetCodeAddress"},
        };
        // clang-format on

        RegisterHandlers(functions);

        // Identity map user code range into sysmodule context
        configuration.user_ro_memory = user_ro;
        configuration.user_rx_memory = user_rx;
        configuration.sys_ro_memory = user_ro;
        configuration.sys_rx_memory = user_rx;
    }

    void GenerateCode(HLERequestContext& ctx) {
        LOG_DEBUG(Service_JIT, "called");

        struct InputParameters {
            u32 data_size;
            u64 command;
            std::array<CodeRange, 2> ranges;
            Struct32 data;
        };

        struct OutputParameters {
            s32 return_value;
            std::array<CodeRange, 2> ranges;
        };

        IPC::RequestParser rp{ctx};
        const auto parameters{rp.PopRaw<InputParameters>()};

        // Optional input/output buffers
        const auto input_buffer{ctx.CanReadBuffer() ? ctx.ReadBuffer() : std::span<const u8>()};
        std::vector<u8> output_buffer(ctx.CanWriteBuffer() ? ctx.GetWriteBufferSize() : 0);

        // Function call prototype:
        // void GenerateCode(s32* ret, CodeRange* c0_out, CodeRange* c1_out, JITConfiguration* cfg,
        //                   u64 cmd, u8* input_buf, size_t input_size, CodeRange* c0_in,
        //                   CodeRange* c1_in, Struct32* data, size_t data_size, u8* output_buf,
        //                   size_t output_size);
        //
        // The command argument is used to control the behavior of the plugin during code
        // generation. The configuration allows the plugin to access the output code ranges, and the
        // other arguments are used to transfer state between the game and the plugin.

        const VAddr ret_ptr{context.AddHeap(0u)};
        const VAddr c0_in_ptr{context.AddHeap(parameters.ranges[0])};
        const VAddr c1_in_ptr{context.AddHeap(parameters.ranges[1])};
        const VAddr c0_out_ptr{context.AddHeap(ClearSize(parameters.ranges[0]))};
        const VAddr c1_out_ptr{context.AddHeap(ClearSize(parameters.ranges[1]))};

        const VAddr input_ptr{context.AddHeap(input_buffer.data(), input_buffer.size())};
        const VAddr output_ptr{context.AddHeap(output_buffer.data(), output_buffer.size())};
        const VAddr data_ptr{context.AddHeap(parameters.data)};
        const VAddr configuration_ptr{context.AddHeap(configuration)};

        // The callback does not directly return a value, it only writes to the output pointer
        context.CallFunction(callbacks.GenerateCode, ret_ptr, c0_out_ptr, c1_out_ptr,
                             configuration_ptr, parameters.command, input_ptr, input_buffer.size(),
                             c0_in_ptr, c1_in_ptr, data_ptr, parameters.data_size, output_ptr,
                             output_buffer.size());

        const s32 return_value{context.GetHeap<s32>(ret_ptr)};

        if (return_value == 0) {
            // The callback has written to the output executable code range,
            // requiring an instruction cache invalidation
            Core::InvalidateInstructionCacheRange(process.GetPointerUnsafe(),
                                                  configuration.user_rx_memory.offset,
                                                  configuration.user_rx_memory.size);

            // Write back to the IPC output buffer, if provided
            if (ctx.CanWriteBuffer()) {
                context.GetHeap(output_ptr, output_buffer.data(), output_buffer.size());
                ctx.WriteBuffer(output_buffer.data(), output_buffer.size());
            }

            const OutputParameters out{
                .return_value = return_value,
                .ranges =
                    {
                        context.GetHeap<CodeRange>(c0_out_ptr),
                        context.GetHeap<CodeRange>(c1_out_ptr),
                    },
            };

            IPC::ResponseBuilder rb{ctx, 8};
            rb.Push(ResultSuccess);
            rb.PushRaw(out);
        } else {
            LOG_WARNING(Service_JIT, "plugin GenerateCode callback failed");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
        }
    };

    void Control(HLERequestContext& ctx) {
        LOG_DEBUG(Service_JIT, "called");

        IPC::RequestParser rp{ctx};
        const auto command{rp.PopRaw<u64>()};

        // Optional input/output buffers
        const auto input_buffer{ctx.CanReadBuffer() ? ctx.ReadBuffer() : std::span<const u8>()};
        std::vector<u8> output_buffer(ctx.CanWriteBuffer() ? ctx.GetWriteBufferSize() : 0);

        // Function call prototype:
        // u64 Control(s32* ret, JITConfiguration* cfg, u64 cmd, u8* input_buf, size_t input_size,
        //             u8* output_buf, size_t output_size);
        //
        // This function is used to set up the state of the plugin before code generation, generally
        // passing objects like pointers to VM state from the game. It is usually called once.

        const VAddr ret_ptr{context.AddHeap(0u)};
        const VAddr configuration_ptr{context.AddHeap(configuration)};
        const VAddr input_ptr{context.AddHeap(input_buffer.data(), input_buffer.size())};
        const VAddr output_ptr{context.AddHeap(output_buffer.data(), output_buffer.size())};

        const u64 wrapper_value{context.CallFunction(callbacks.Control, ret_ptr, configuration_ptr,
                                                     command, input_ptr, input_buffer.size(),
                                                     output_ptr, output_buffer.size())};

        const s32 return_value{context.GetHeap<s32>(ret_ptr)};

        if (wrapper_value == 0 && return_value == 0) {
            // Write back to the IPC output buffer, if provided
            if (ctx.CanWriteBuffer()) {
                context.GetHeap(output_ptr, output_buffer.data(), output_buffer.size());
                ctx.WriteBuffer(output_buffer.data(), output_buffer.size());
            }

            IPC::ResponseBuilder rb{ctx, 3};
            rb.Push(ResultSuccess);
            rb.Push(return_value);
        } else {
            LOG_WARNING(Service_JIT, "plugin Control callback failed");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
        }
    }

    void LoadPlugin(HLERequestContext& ctx) {
        LOG_DEBUG(Service_JIT, "called");

        IPC::RequestParser rp{ctx};
        const auto tmem_size{rp.PopRaw<u64>()};
        const auto tmem_handle{ctx.GetCopyHandle(0)};
        const auto nro_plugin{ctx.ReadBuffer(1)};

        if (tmem_size == 0) {
            LOG_ERROR(Service_JIT, "attempted to load plugin with empty transfer memory");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        auto tmem{ctx.GetObjectFromHandle<Kernel::KTransferMemory>(tmem_handle)};
        if (tmem.IsNull()) {
            LOG_ERROR(Service_JIT, "attempted to load plugin with invalid transfer memory handle");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        // Set up the configuration with the required TransferMemory address
        configuration.transfer_memory.offset = GetInteger(tmem->GetSourceAddress());
        configuration.transfer_memory.size = tmem_size;

        // Gather up all the callbacks from the loaded plugin
        auto symbols{Core::Symbols::GetSymbols(nro_plugin, true)};
        const auto GetSymbol{[&](const std::string& name) { return symbols[name].first; }};

        callbacks.rtld_fini = GetSymbol("_fini");
        callbacks.rtld_init = GetSymbol("_init");
        callbacks.Control = GetSymbol("nnjitpluginControl");
        callbacks.ResolveBasicSymbols = GetSymbol("nnjitpluginResolveBasicSymbols");
        callbacks.SetupDiagnostics = GetSymbol("nnjitpluginSetupDiagnostics");
        callbacks.Configure = GetSymbol("nnjitpluginConfigure");
        callbacks.GenerateCode = GetSymbol("nnjitpluginGenerateCode");
        callbacks.GetVersion = GetSymbol("nnjitpluginGetVersion");
        callbacks.OnPrepared = GetSymbol("nnjitpluginOnPrepared");
        callbacks.Keeper = GetSymbol("nnjitpluginKeeper");

        if (callbacks.GetVersion == 0 || callbacks.Configure == 0 || callbacks.GenerateCode == 0 ||
            callbacks.OnPrepared == 0) {
            LOG_ERROR(Service_JIT, "plugin does not implement all necessary functionality");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        if (!context.LoadNRO(nro_plugin)) {
            LOG_ERROR(Service_JIT, "failed to load plugin");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        context.MapProcessMemory(configuration.sys_ro_memory.offset,
                                 configuration.sys_ro_memory.size);
        context.MapProcessMemory(configuration.sys_rx_memory.offset,
                                 configuration.sys_rx_memory.size);
        context.MapProcessMemory(configuration.transfer_memory.offset,
                                 configuration.transfer_memory.size);

        // Run ELF constructors, if needed
        if (callbacks.rtld_init != 0) {
            context.CallFunction(callbacks.rtld_init);
        }

        // Function prototype:
        // u64 GetVersion();
        const auto version{context.CallFunction(callbacks.GetVersion)};
        if (version != 1) {
            LOG_ERROR(Service_JIT, "unknown plugin version {}", version);
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        // Function prototype:
        // void ResolveBasicSymbols(void (*resolver)(const char* name));
        const auto resolve{context.GetHelper("_resolve")};
        if (callbacks.ResolveBasicSymbols != 0) {
            context.CallFunction(callbacks.ResolveBasicSymbols, resolve);
        }

        // Function prototype:
        // void SetupDiagnostics(u32 enabled, void (**resolver)(const char* name));
        const auto resolve_ptr{context.AddHeap(resolve)};
        if (callbacks.SetupDiagnostics != 0) {
            context.CallFunction(callbacks.SetupDiagnostics, 0u, resolve_ptr);
        }

        // Function prototype:
        // void Configure(u32* memory_flags);
        context.CallFunction(callbacks.Configure, 0ull);

        // Function prototype:
        // void OnPrepared(JITConfiguration* cfg);
        const auto configuration_ptr{context.AddHeap(configuration)};
        context.CallFunction(callbacks.OnPrepared, configuration_ptr);

        IPC::ResponseBuilder rb{ctx, 2};
        rb.Push(ResultSuccess);
    }

    void GetCodeAddress(HLERequestContext& ctx) {
        LOG_DEBUG(Service_JIT, "called");

        IPC::ResponseBuilder rb{ctx, 6};
        rb.Push(ResultSuccess);
        rb.Push(configuration.user_rx_memory.offset);
        rb.Push(configuration.user_ro_memory.offset);
    }

private:
    using Struct32 = std::array<u8, 32>;

    struct GuestCallbacks {
        VAddr rtld_fini;
        VAddr rtld_init;
        VAddr Control;
        VAddr ResolveBasicSymbols;
        VAddr SetupDiagnostics;
        VAddr Configure;
        VAddr GenerateCode;
        VAddr GetVersion;
        VAddr Keeper;
        VAddr OnPrepared;
    };

    struct JITConfiguration {
        CodeRange user_rx_memory;
        CodeRange user_ro_memory;
        CodeRange transfer_memory;
        CodeRange sys_rx_memory;
        CodeRange sys_ro_memory;
    };

    static CodeRange ClearSize(CodeRange in) {
        in.size = 0;
        return in;
    }

    Kernel::KScopedAutoObject<Kernel::KProcess> process;
    GuestCallbacks callbacks;
    JITConfiguration configuration;
    JITContext context;
};

class JITU final : public ServiceFramework<JITU> {
public:
    explicit JITU(Core::System& system_) : ServiceFramework{system_, "jit:u"} {
        // clang-format off
        static const FunctionInfo functions[] = {
            {0, &JITU::CreateJitEnvironment, "CreateJitEnvironment"},
        };
        // clang-format on

        RegisterHandlers(functions);
    }

    void CreateJitEnvironment(HLERequestContext& ctx) {
        LOG_DEBUG(Service_JIT, "called");

        struct Parameters {
            u64 rx_size;
            u64 ro_size;
        };

        IPC::RequestParser rp{ctx};
        const auto parameters{rp.PopRaw<Parameters>()};
        const auto process_handle{ctx.GetCopyHandle(0)};
        const auto rx_mem_handle{ctx.GetCopyHandle(1)};
        const auto ro_mem_handle{ctx.GetCopyHandle(2)};

        if (parameters.rx_size == 0 || parameters.ro_size == 0) {
            LOG_ERROR(Service_JIT, "attempted to init with empty code regions");
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        auto process{ctx.GetObjectFromHandle<Kernel::KProcess>(process_handle)};
        if (process.IsNull()) {
            LOG_ERROR(Service_JIT, "process is null for handle=0x{:08X}", process_handle);
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        auto rx_mem{ctx.GetObjectFromHandle<Kernel::KCodeMemory>(rx_mem_handle)};
        if (rx_mem.IsNull()) {
            LOG_ERROR(Service_JIT, "rx_mem is null for handle=0x{:08X}", rx_mem_handle);
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        auto ro_mem{ctx.GetObjectFromHandle<Kernel::KCodeMemory>(ro_mem_handle)};
        if (ro_mem.IsNull()) {
            LOG_ERROR(Service_JIT, "ro_mem is null for handle=0x{:08X}", ro_mem_handle);
            IPC::ResponseBuilder rb{ctx, 2};
            rb.Push(ResultUnknown);
            return;
        }

        const CodeRange user_rx{
            .offset = GetInteger(rx_mem->GetSourceAddress()),
            .size = parameters.rx_size,
        };

        const CodeRange user_ro{
            .offset = GetInteger(ro_mem->GetSourceAddress()),
            .size = parameters.ro_size,
        };

        IPC::ResponseBuilder rb{ctx, 2, 0, 1};
        rb.Push(ResultSuccess);
        rb.PushIpcInterface<IJitEnvironment>(system, *process, user_rx, user_ro);
    }
};

void LoopProcess(Core::System& system) {
    auto server_manager = std::make_unique<ServerManager>(system);

    server_manager->RegisterNamedService("jit:u", std::make_shared<JITU>(system));
    ServerManager::RunServer(std::move(server_manager));
}

} // namespace Service::JIT