src/core/core.c (view raw)
1/* Copyright (c) 2013-2016 Jeffrey Pfau
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6#include <mgba/core/core.h>
7
8#include <mgba/core/cheats.h>
9#include <mgba/core/log.h>
10#include <mgba/core/serialize.h>
11#include <mgba-util/vfs.h>
12#include <mgba/internal/debugger/symbols.h>
13
14#ifdef USE_ELF
15#include <mgba-util/elf-read.h>
16#endif
17
18#ifdef M_CORE_GB
19#include <mgba/gb/core.h>
20#include <mgba/gb/interface.h>
21#endif
22#ifdef M_CORE_GBA
23#include <mgba/gba/core.h>
24#include <mgba/gba/interface.h>
25#endif
26#ifndef MINIMAL_CORE
27#include <mgba/feature/video-logger.h>
28#endif
29
30static const struct mCoreFilter {
31 bool (*filter)(struct VFile*);
32 struct mCore* (*open)(void);
33 enum mPlatform platform;
34} _filters[] = {
35#ifdef M_CORE_GBA
36 { GBAIsROM, GBACoreCreate, mPLATFORM_GBA },
37#endif
38#ifdef M_CORE_GB
39 { GBIsROM, GBCoreCreate, mPLATFORM_GB },
40#endif
41 { 0, 0, mPLATFORM_NONE }
42};
43
44struct mCore* mCoreFindVF(struct VFile* vf) {
45 if (!vf) {
46 return NULL;
47 }
48 const struct mCoreFilter* filter;
49 for (filter = &_filters[0]; filter->filter; ++filter) {
50 if (filter->filter(vf)) {
51 break;
52 }
53 }
54 if (filter->open) {
55 return filter->open();
56 }
57#ifndef MINIMAL_CORE
58 return mVideoLogCoreFind(vf);
59#endif
60 return NULL;
61}
62
63enum mPlatform mCoreIsCompatible(struct VFile* vf) {
64 if (!vf) {
65 return mPLATFORM_NONE;
66 }
67 const struct mCoreFilter* filter;
68 for (filter = &_filters[0]; filter->filter; ++filter) {
69 if (filter->filter(vf)) {
70 return filter->platform;
71 }
72 }
73 return mPLATFORM_NONE;
74}
75
76#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
77#include <mgba-util/png-io.h>
78
79#ifdef PSP2
80#include <psp2/photoexport.h>
81#endif
82
83struct mCore* mCoreFind(const char* path) {
84 struct VDir* archive = VDirOpenArchive(path);
85 struct mCore* core = NULL;
86 if (archive) {
87 struct VDirEntry* dirent = archive->listNext(archive);
88 while (dirent) {
89 struct VFile* vf = archive->openFile(archive, dirent->name(dirent), O_RDONLY);
90 if (!vf) {
91 dirent = archive->listNext(archive);
92 continue;
93 }
94 core = mCoreFindVF(vf);
95 vf->close(vf);
96 if (core) {
97 break;
98 }
99 dirent = archive->listNext(archive);
100 }
101 archive->close(archive);
102 } else {
103 struct VFile* vf = VFileOpen(path, O_RDONLY);
104 if (!vf) {
105 return NULL;
106 }
107 core = mCoreFindVF(vf);
108 vf->close(vf);
109 }
110 if (core) {
111 return core;
112 }
113 return NULL;
114}
115
116bool mCoreLoadFile(struct mCore* core, const char* path) {
117#ifdef FIXED_ROM_BUFFER
118 return mCorePreloadFile(core, path);
119#else
120 struct VFile* rom = mDirectorySetOpenPath(&core->dirs, path, core->isROM);
121 if (!rom) {
122 return false;
123 }
124
125 bool ret = core->loadROM(core, rom);
126 if (!ret) {
127 rom->close(rom);
128 }
129 return ret;
130#endif
131}
132
133bool mCorePreloadVF(struct mCore* core, struct VFile* vf) {
134 return mCorePreloadVFCB(core, vf, NULL, NULL);
135}
136
137bool mCorePreloadFile(struct mCore* core, const char* path) {
138 return mCorePreloadFileCB(core, path, NULL, NULL);
139}
140
141bool mCorePreloadVFCB(struct mCore* core, struct VFile* vf, void (cb)(size_t, size_t, void*), void* context) {
142 struct VFile* vfm;
143 size_t size = vf->size(vf);
144
145#ifdef FIXED_ROM_BUFFER
146 extern uint32_t* romBuffer;
147 extern size_t romBufferSize;
148 if (size > romBufferSize) {
149 return false;
150 }
151 vfm = VFileFromMemory(romBuffer, size);
152#else
153 vfm = VFileMemChunk(NULL, size);
154#endif
155
156 size_t chunkSize;
157#ifdef FIXED_ROM_BUFFER
158 uint8_t* buffer = (uint8_t*) romBuffer;
159 chunkSize = 0x10000;
160#else
161 uint8_t buffer[0x4000];
162 chunkSize = sizeof(buffer);
163#endif
164 ssize_t read;
165 size_t total = 0;
166 vf->seek(vf, 0, SEEK_SET);
167 while ((read = vf->read(vf, buffer, chunkSize)) > 0) {
168#ifdef FIXED_ROM_BUFFER
169 buffer += read;
170#else
171 vfm->write(vfm, buffer, read);
172#endif
173 total += read;
174 if (cb) {
175 cb(total, size, context);
176 }
177 }
178 vf->close(vf);
179 if (read < 0) {
180 vfm->close(vfm);
181 return false;
182 }
183 bool ret = core->loadROM(core, vfm);
184 if (!ret) {
185 vfm->close(vfm);
186 }
187 return ret;
188}
189
190bool mCorePreloadFileCB(struct mCore* core, const char* path, void (cb)(size_t, size_t, void*), void* context) {
191 struct VFile* rom = mDirectorySetOpenPath(&core->dirs, path, core->isROM);
192 if (!rom) {
193 return false;
194 }
195
196 bool ret = mCorePreloadVFCB(core, rom, cb, context);
197 if (!ret) {
198 rom->close(rom);
199 }
200 return ret;
201}
202
203bool mCoreAutoloadSave(struct mCore* core) {
204 if (!core->dirs.save) {
205 return false;
206 }
207 return core->loadSave(core, mDirectorySetOpenSuffix(&core->dirs, core->dirs.save, ".sav", O_CREAT | O_RDWR));
208}
209
210bool mCoreAutoloadPatch(struct mCore* core) {
211 if (!core->dirs.patch) {
212 return false;
213 }
214 return core->loadPatch(core, mDirectorySetOpenSuffix(&core->dirs, core->dirs.patch, ".ups", O_RDONLY)) ||
215 core->loadPatch(core, mDirectorySetOpenSuffix(&core->dirs, core->dirs.patch, ".ips", O_RDONLY)) ||
216 core->loadPatch(core, mDirectorySetOpenSuffix(&core->dirs, core->dirs.patch, ".bps", O_RDONLY));
217}
218
219bool mCoreAutoloadCheats(struct mCore* core) {
220 bool success = true;
221 int cheatAuto;
222 if (!mCoreConfigGetIntValue(&core->config, "cheatAutoload", &cheatAuto) || cheatAuto) {
223 struct VFile* vf = mDirectorySetOpenSuffix(&core->dirs, core->dirs.cheats, ".cheats", O_RDONLY);
224 if (vf) {
225 struct mCheatDevice* device = core->cheatDevice(core);
226 success = mCheatParseFile(device, vf);
227 vf->close(vf);
228 }
229 }
230 if (!mCoreConfigGetIntValue(&core->config, "cheatAutosave", &cheatAuto) || cheatAuto) {
231 struct mCheatDevice* device = core->cheatDevice(core);
232 device->autosave = true;
233 }
234 return success;
235}
236
237bool mCoreSaveState(struct mCore* core, int slot, int flags) {
238 struct VFile* vf = mCoreGetState(core, slot, true);
239 if (!vf) {
240 return false;
241 }
242 bool success = mCoreSaveStateNamed(core, vf, flags);
243 vf->close(vf);
244 if (success) {
245 mLOG(STATUS, INFO, "State %i saved", slot);
246 } else {
247 mLOG(STATUS, INFO, "State %i failed to save", slot);
248 }
249
250 return success;
251}
252
253bool mCoreLoadState(struct mCore* core, int slot, int flags) {
254 struct VFile* vf = mCoreGetState(core, slot, false);
255 if (!vf) {
256 return false;
257 }
258 bool success = mCoreLoadStateNamed(core, vf, flags);
259 vf->close(vf);
260 if (success) {
261 mLOG(STATUS, INFO, "State %i loaded", slot);
262 } else {
263 mLOG(STATUS, INFO, "State %i failed to load", slot);
264 }
265
266 return success;
267}
268
269struct VFile* mCoreGetState(struct mCore* core, int slot, bool write) {
270 if (!core->dirs.state) {
271 return NULL;
272 }
273 char name[PATH_MAX + 14]; // Quash warning
274 snprintf(name, sizeof(name), "%s.ss%i", core->dirs.baseName, slot);
275 return core->dirs.state->openFile(core->dirs.state, name, write ? (O_CREAT | O_TRUNC | O_RDWR) : O_RDONLY);
276}
277
278void mCoreDeleteState(struct mCore* core, int slot) {
279 char name[PATH_MAX + 14]; // Quash warning
280 snprintf(name, sizeof(name), "%s.ss%i", core->dirs.baseName, slot);
281 core->dirs.state->deleteFile(core->dirs.state, name);
282}
283
284void mCoreTakeScreenshot(struct mCore* core) {
285#ifdef USE_PNG
286 size_t stride;
287 const void* pixels = 0;
288 unsigned width, height;
289 core->desiredVideoDimensions(core, &width, &height);
290 struct VFile* vf;
291#ifndef PSP2
292 vf = VDirFindNextAvailable(core->dirs.screenshot, core->dirs.baseName, "-", ".png", O_CREAT | O_TRUNC | O_WRONLY);
293#else
294 vf = VFileMemChunk(0, 0);
295#endif
296 bool success = false;
297 if (vf) {
298 core->getPixels(core, &pixels, &stride);
299 png_structp png = PNGWriteOpen(vf);
300 png_infop info = PNGWriteHeader(png, width, height);
301 success = PNGWritePixels(png, width, height, stride, pixels);
302 PNGWriteClose(png, info);
303#ifdef PSP2
304 void* data = vf->map(vf, 0, 0);
305 PhotoExportParam param = {
306 0,
307 NULL,
308 NULL,
309 NULL,
310 { 0 }
311 };
312 scePhotoExportFromData(data, vf->size(vf), ¶m, NULL, NULL, NULL, NULL, 0);
313#endif
314 vf->close(vf);
315 }
316 if (success) {
317 mLOG(STATUS, INFO, "Screenshot saved");
318 return;
319 }
320#else
321 UNUSED(core);
322#endif
323 mLOG(STATUS, WARN, "Failed to take screenshot");
324}
325#endif
326
327void mCoreInitConfig(struct mCore* core, const char* port) {
328 mCoreConfigInit(&core->config, port);
329}
330
331void mCoreLoadConfig(struct mCore* core) {
332#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
333 mCoreConfigLoad(&core->config);
334#endif
335 mCoreLoadForeignConfig(core, &core->config);
336}
337
338void mCoreLoadForeignConfig(struct mCore* core, const struct mCoreConfig* config) {
339 mCoreConfigMap(config, &core->opts);
340#if !defined(MINIMAL_CORE) || MINIMAL_CORE < 2
341 mDirectorySetMapOptions(&core->dirs, &core->opts);
342#endif
343 if (core->opts.audioBuffers) {
344 core->setAudioBufferSize(core, core->opts.audioBuffers);
345 }
346
347 mCoreConfigCopyValue(&core->config, config, "cheatAutosave");
348 mCoreConfigCopyValue(&core->config, config, "cheatAutoload");
349
350 core->loadConfig(core, config);
351}
352
353void mCoreSetRTC(struct mCore* core, struct mRTCSource* rtc) {
354 core->rtc.custom = rtc;
355 core->rtc.override = RTC_CUSTOM_START;
356}
357
358void* mCoreGetMemoryBlock(struct mCore* core, uint32_t start, size_t* size) {
359 return mCoreGetMemoryBlockMasked(core, start, size, mCORE_MEMORY_MAPPED);
360}
361
362void* mCoreGetMemoryBlockMasked(struct mCore* core, uint32_t start, size_t* size, uint32_t mask) {
363 const struct mCoreMemoryBlock* blocks;
364 size_t nBlocks = core->listMemoryBlocks(core, &blocks);
365 size_t i;
366 for (i = 0; i < nBlocks; ++i) {
367 if (!(blocks[i].flags & mCORE_MEMORY_MAPPED)) {
368 continue;
369 }
370 if (!(blocks[i].flags & mask)) {
371 continue;
372 }
373 if (start < blocks[i].start) {
374 continue;
375 }
376 if (start >= blocks[i].start + blocks[i].size) {
377 continue;
378 }
379 uint8_t* out = core->getMemoryBlock(core, blocks[i].id, size);
380 out += start - blocks[i].start;
381 *size -= start - blocks[i].start;
382 return out;
383 }
384 return NULL;
385}
386
387#ifdef USE_ELF
388bool mCoreLoadELF(struct mCore* core, struct ELF* elf) {
389 struct ELFProgramHeaders ph;
390 ELFProgramHeadersInit(&ph, 0);
391 ELFGetProgramHeaders(elf, &ph);
392 size_t i;
393 for (i = 0; i < ELFProgramHeadersSize(&ph); ++i) {
394 size_t bsize, esize;
395 Elf32_Phdr* phdr = ELFProgramHeadersGetPointer(&ph, i);
396 if (!phdr->p_filesz) {
397 continue;
398 }
399 void* block = mCoreGetMemoryBlockMasked(core, phdr->p_paddr, &bsize, mCORE_MEMORY_WRITE | mCORE_MEMORY_WORM);
400 char* bytes = ELFBytes(elf, &esize);
401 if (block && bsize >= phdr->p_filesz && esize > phdr->p_offset && esize >= phdr->p_filesz + phdr->p_offset) {
402 memcpy(block, &bytes[phdr->p_offset], phdr->p_filesz);
403 } else {
404 ELFProgramHeadersDeinit(&ph);
405 return false;
406 }
407 }
408 ELFProgramHeadersDeinit(&ph);
409 return true;
410}
411
412#ifdef USE_DEBUGGERS
413void mCoreLoadELFSymbols(struct mDebuggerSymbols* symbols, struct ELF* elf) {
414 size_t symIndex = ELFFindSection(elf, ".symtab");
415 size_t names = ELFFindSection(elf, ".strtab");
416 Elf32_Shdr* symHeader = ELFGetSectionHeader(elf, symIndex);
417 char* bytes = ELFBytes(elf, NULL);
418
419 Elf32_Sym* syms = (Elf32_Sym*) &bytes[symHeader->sh_offset];
420 size_t i;
421 for (i = 0; i * sizeof(*syms) < symHeader->sh_size; ++i) {
422 if (!syms[i].st_name || ELF32_ST_TYPE(syms[i].st_info) == STT_FILE) {
423 continue;
424 }
425 const char* name = ELFGetString(elf, names, syms[i].st_name);
426 if (name[0] == '$') {
427 continue;
428 }
429 mDebuggerSymbolAdd(symbols, name, syms[i].st_value, -1);
430 }
431}
432#endif
433#endif