| 1 |
/* |
| 2 |
* main_beos.cpp - Startup code for BeOS |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2001 Christian Bauer |
| 5 |
* |
| 6 |
* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
| 11 |
* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#include <AppKit.h> |
| 22 |
#include <InterfaceKit.h> |
| 23 |
#include <KernelKit.h> |
| 24 |
#include <StorageKit.h> |
| 25 |
|
| 26 |
#include <unistd.h> |
| 27 |
#include <fcntl.h> |
| 28 |
#include <signal.h> |
| 29 |
#include <stdio.h> |
| 30 |
#include <stdlib.h> |
| 31 |
#include <time.h> |
| 32 |
|
| 33 |
#include "sysdeps.h" |
| 34 |
#include "cpu_emulation.h" |
| 35 |
#include "xpram.h" |
| 36 |
#include "timer.h" |
| 37 |
#include "video.h" |
| 38 |
#include "rom_patches.h" |
| 39 |
#include "prefs.h" |
| 40 |
#include "prefs_editor.h" |
| 41 |
#include "sys.h" |
| 42 |
#include "user_strings.h" |
| 43 |
#include "version.h" |
| 44 |
#include "main.h" |
| 45 |
|
| 46 |
#include "sheep_driver.h" |
| 47 |
|
| 48 |
#define DEBUG 0 |
| 49 |
#include "debug.h" |
| 50 |
|
| 51 |
|
| 52 |
// Constants |
| 53 |
const char APP_SIGNATURE[] = "application/x-vnd.cebix-BasiliskII"; |
| 54 |
const char ROM_FILE_NAME[] = "ROM"; |
| 55 |
const char RAM_AREA_NAME[] = "Macintosh RAM"; |
| 56 |
const char ROM_AREA_NAME[] = "Macintosh ROM"; |
| 57 |
const uint32 MSG_START = 'strt'; // Emulator start message |
| 58 |
const uint32 ROM_AREA_SIZE = 0x500000; // Enough to hold PowerMac ROM (for powerrom_cpu) |
| 59 |
|
| 60 |
// Prototypes |
| 61 |
#if __POWERPC__ |
| 62 |
static void sigsegv_handler(vregs *r); |
| 63 |
#endif |
| 64 |
|
| 65 |
|
| 66 |
// Application object |
| 67 |
class BasiliskII : public BApplication { |
| 68 |
public: |
| 69 |
BasiliskII() : BApplication(APP_SIGNATURE) |
| 70 |
{ |
| 71 |
// Find application directory and cwd to it |
| 72 |
app_info the_info; |
| 73 |
GetAppInfo(&the_info); |
| 74 |
BEntry the_file(&the_info.ref); |
| 75 |
BEntry the_dir; |
| 76 |
the_file.GetParent(&the_dir); |
| 77 |
BPath the_path; |
| 78 |
the_dir.GetPath(&the_path); |
| 79 |
chdir(the_path.Path()); |
| 80 |
|
| 81 |
// Initialize other variables |
| 82 |
rom_area = ram_area = -1; |
| 83 |
xpram_thread = tick_thread = -1; |
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xpram_thread_active = true; |
| 85 |
tick_thread_active = true; |
| 86 |
AllowQuitting = true; |
| 87 |
} |
| 88 |
virtual void ReadyToRun(void); |
| 89 |
virtual void MessageReceived(BMessage *msg); |
| 90 |
void StartEmulator(void); |
| 91 |
virtual bool QuitRequested(void); |
| 92 |
virtual void Quit(void); |
| 93 |
|
| 94 |
thread_id xpram_thread; // XPRAM watchdog |
| 95 |
thread_id tick_thread; // 60Hz thread |
| 96 |
|
| 97 |
volatile bool xpram_thread_active; // Flag for quitting the XPRAM thread |
| 98 |
volatile bool tick_thread_active; // Flag for quitting the 60Hz thread |
| 99 |
|
| 100 |
bool AllowQuitting; // Flag: Alt-Q quitting allowed |
| 101 |
|
| 102 |
private: |
| 103 |
static status_t emul_func(void *arg); |
| 104 |
static status_t tick_func(void *arg); |
| 105 |
static status_t xpram_func(void *arg); |
| 106 |
static void sigsegv_invoc(int sig, void *arg, vregs *r); |
| 107 |
|
| 108 |
void init_rom(void); |
| 109 |
void load_rom(void); |
| 110 |
|
| 111 |
area_id rom_area; // ROM area ID |
| 112 |
area_id ram_area; // RAM area ID |
| 113 |
|
| 114 |
struct sigaction sigsegv_action; // Data access exception signal (of emulator thread) |
| 115 |
|
| 116 |
// Exceptions |
| 117 |
class area_error {}; |
| 118 |
class file_open_error {}; |
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class file_read_error {}; |
| 120 |
class rom_size_error {}; |
| 121 |
}; |
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|
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static BasiliskII *the_app; |
| 124 |
|
| 125 |
|
| 126 |
// CPU and FPU type, addressing mode |
| 127 |
int CPUType; |
| 128 |
bool CPUIs68060; |
| 129 |
int FPUType; |
| 130 |
bool TwentyFourBitAddressing; |
| 131 |
|
| 132 |
|
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// Global variables for PowerROM CPU |
| 134 |
thread_id emul_thread = -1; // Emulator thread |
| 135 |
|
| 136 |
#if __POWERPC__ |
| 137 |
int sheep_fd = -1; // fd of sheep driver |
| 138 |
#endif |
| 139 |
|
| 140 |
|
| 141 |
/* |
| 142 |
* Create application object and start it |
| 143 |
*/ |
| 144 |
|
| 145 |
int main(int argc, char **argv) |
| 146 |
{ |
| 147 |
the_app = new BasiliskII(); |
| 148 |
the_app->Run(); |
| 149 |
delete the_app; |
| 150 |
return 0; |
| 151 |
} |
| 152 |
|
| 153 |
|
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/* |
| 155 |
* Run application |
| 156 |
*/ |
| 157 |
|
| 158 |
void BasiliskII::ReadyToRun(void) |
| 159 |
{ |
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// Initialize variables |
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RAMBaseHost = NULL; |
| 162 |
ROMBaseHost = NULL; |
| 163 |
srand(real_time_clock()); |
| 164 |
tzset(); |
| 165 |
|
| 166 |
// Print some info |
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printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR); |
| 168 |
printf(" %s\n", GetString(STR_ABOUT_TEXT2)); |
| 169 |
|
| 170 |
// Delete old areas |
| 171 |
area_id old_ram_area = find_area(RAM_AREA_NAME); |
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if (old_ram_area > 0) |
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delete_area(old_ram_area); |
| 174 |
area_id old_rom_area = find_area(ROM_AREA_NAME); |
| 175 |
if (old_rom_area > 0) |
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delete_area(old_rom_area); |
| 177 |
|
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// Read preferences |
| 179 |
int argc = 0; |
| 180 |
char **argv = NULL; |
| 181 |
PrefsInit(argc, argv); |
| 182 |
|
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// Init system routines |
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SysInit(); |
| 185 |
|
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// Show preferences editor (or start emulator directly) |
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if (!PrefsFindBool("nogui")) |
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PrefsEditor(); |
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else |
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PostMessage(MSG_START); |
| 191 |
} |
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|
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|
| 194 |
/* |
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* Message received |
| 196 |
*/ |
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|
| 198 |
void BasiliskII::MessageReceived(BMessage *msg) |
| 199 |
{ |
| 200 |
switch (msg->what) { |
| 201 |
case MSG_START: |
| 202 |
StartEmulator(); |
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break; |
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default: |
| 205 |
BApplication::MessageReceived(msg); |
| 206 |
} |
| 207 |
} |
| 208 |
|
| 209 |
|
| 210 |
/* |
| 211 |
* Start emulator |
| 212 |
*/ |
| 213 |
|
| 214 |
void BasiliskII::StartEmulator(void) |
| 215 |
{ |
| 216 |
char str[256]; |
| 217 |
|
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#if REAL_ADDRESSING |
| 219 |
// Open sheep driver and remap low memory |
| 220 |
sheep_fd = open("/dev/sheep", 0); |
| 221 |
if (sheep_fd < 0) { |
| 222 |
sprintf(str, GetString(STR_NO_SHEEP_DRIVER_ERR), strerror(sheep_fd), sheep_fd); |
| 223 |
ErrorAlert(str); |
| 224 |
PostMessage(B_QUIT_REQUESTED); |
| 225 |
return; |
| 226 |
} |
| 227 |
status_t res = ioctl(sheep_fd, SHEEP_UP); |
| 228 |
if (res < 0) { |
| 229 |
sprintf(str, GetString(STR_SHEEP_UP_ERR), strerror(res), res); |
| 230 |
ErrorAlert(str); |
| 231 |
PostMessage(B_QUIT_REQUESTED); |
| 232 |
return; |
| 233 |
} |
| 234 |
#endif |
| 235 |
|
| 236 |
// Create area for Mac RAM |
| 237 |
RAMSize = PrefsFindInt32("ramsize") & 0xfff00000; // Round down to 1MB boundary |
| 238 |
if (RAMSize < 1024*1024) { |
| 239 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
| 240 |
RAMSize = 1024*1024; |
| 241 |
} |
| 242 |
|
| 243 |
RAMBaseHost = (uint8 *)0x10000000; |
| 244 |
ram_area = create_area(RAM_AREA_NAME, (void **)&RAMBaseHost, B_BASE_ADDRESS, RAMSize, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
| 245 |
if (ram_area < 0) { |
| 246 |
ErrorAlert(GetString(STR_NO_RAM_AREA_ERR)); |
| 247 |
PostMessage(B_QUIT_REQUESTED); |
| 248 |
return; |
| 249 |
} |
| 250 |
D(bug("RAM area %ld at %p\n", ram_area, RAMBaseHost)); |
| 251 |
|
| 252 |
// Create area and load Mac ROM |
| 253 |
try { |
| 254 |
init_rom(); |
| 255 |
} catch (area_error) { |
| 256 |
ErrorAlert(GetString(STR_NO_ROM_AREA_ERR)); |
| 257 |
PostMessage(B_QUIT_REQUESTED); |
| 258 |
return; |
| 259 |
} catch (file_open_error) { |
| 260 |
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR)); |
| 261 |
PostMessage(B_QUIT_REQUESTED); |
| 262 |
return; |
| 263 |
} catch (file_read_error) { |
| 264 |
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR)); |
| 265 |
PostMessage(B_QUIT_REQUESTED); |
| 266 |
return; |
| 267 |
} catch (rom_size_error) { |
| 268 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 269 |
PostMessage(B_QUIT_REQUESTED); |
| 270 |
return; |
| 271 |
} |
| 272 |
|
| 273 |
// Initialize everything |
| 274 |
if (!InitAll()) { |
| 275 |
PostMessage(B_QUIT_REQUESTED); |
| 276 |
return; |
| 277 |
} |
| 278 |
|
| 279 |
// Write protect ROM |
| 280 |
set_area_protection(rom_area, B_READ_AREA); |
| 281 |
|
| 282 |
// Disallow quitting with Alt-Q from now on |
| 283 |
AllowQuitting = false; |
| 284 |
|
| 285 |
// Start XPRAM watchdog thread |
| 286 |
xpram_thread = spawn_thread(xpram_func, "XPRAM Watchdog", B_LOW_PRIORITY, this); |
| 287 |
resume_thread(xpram_thread); |
| 288 |
|
| 289 |
// Start 60Hz interrupt |
| 290 |
tick_thread = spawn_thread(tick_func, "60Hz", B_REAL_TIME_PRIORITY, this); |
| 291 |
resume_thread(tick_thread); |
| 292 |
|
| 293 |
// Start emulator thread |
| 294 |
emul_thread = spawn_thread(emul_func, "MacOS", B_NORMAL_PRIORITY, this); |
| 295 |
resume_thread(emul_thread); |
| 296 |
} |
| 297 |
|
| 298 |
|
| 299 |
/* |
| 300 |
* Quit emulator |
| 301 |
*/ |
| 302 |
|
| 303 |
void QuitEmulator(void) |
| 304 |
{ |
| 305 |
the_app->AllowQuitting = true; |
| 306 |
be_app->PostMessage(B_QUIT_REQUESTED); |
| 307 |
exit_thread(0); |
| 308 |
} |
| 309 |
|
| 310 |
bool BasiliskII::QuitRequested(void) |
| 311 |
{ |
| 312 |
if (AllowQuitting) |
| 313 |
return BApplication::QuitRequested(); |
| 314 |
else |
| 315 |
return false; |
| 316 |
} |
| 317 |
|
| 318 |
void BasiliskII::Quit(void) |
| 319 |
{ |
| 320 |
status_t l; |
| 321 |
|
| 322 |
// Stop 60Hz interrupt |
| 323 |
if (tick_thread > 0) { |
| 324 |
tick_thread_active = false; |
| 325 |
wait_for_thread(tick_thread, &l); |
| 326 |
} |
| 327 |
|
| 328 |
// Wait for emulator thread to finish |
| 329 |
if (emul_thread > 0) |
| 330 |
wait_for_thread(emul_thread, &l); |
| 331 |
|
| 332 |
// Exit 680x0 emulation |
| 333 |
Exit680x0(); |
| 334 |
|
| 335 |
// Stop XPRAM watchdog thread |
| 336 |
if (xpram_thread > 0) { |
| 337 |
xpram_thread_active = false; |
| 338 |
suspend_thread(xpram_thread); // Wake thread up from snooze() |
| 339 |
snooze(1000); |
| 340 |
resume_thread(xpram_thread); |
| 341 |
wait_for_thread(xpram_thread, &l); |
| 342 |
} |
| 343 |
|
| 344 |
// Deinitialize everything |
| 345 |
ExitAll(); |
| 346 |
|
| 347 |
// Delete ROM area |
| 348 |
if (rom_area >= 0) |
| 349 |
delete_area(rom_area); |
| 350 |
|
| 351 |
// Delete RAM area |
| 352 |
if (ram_area >= 0) |
| 353 |
delete_area(ram_area); |
| 354 |
|
| 355 |
#if REAL_ADDRESSING |
| 356 |
// Unmap low memory and close memory mess driver |
| 357 |
if (sheep_fd >= 0) { |
| 358 |
ioctl(sheep_fd, SHEEP_DOWN); |
| 359 |
close(sheep_fd); |
| 360 |
} |
| 361 |
#endif |
| 362 |
|
| 363 |
// Exit system routines |
| 364 |
SysExit(); |
| 365 |
|
| 366 |
// Exit preferences |
| 367 |
PrefsExit(); |
| 368 |
|
| 369 |
BApplication::Quit(); |
| 370 |
} |
| 371 |
|
| 372 |
|
| 373 |
/* |
| 374 |
* Create area for ROM (sets rom_area) and load ROM file |
| 375 |
* |
| 376 |
* area_error : Cannot create area |
| 377 |
* file_open_error: Cannot open ROM file |
| 378 |
* file_read_error: Cannot read ROM file |
| 379 |
*/ |
| 380 |
|
| 381 |
void BasiliskII::init_rom(void) |
| 382 |
{ |
| 383 |
// Create area for ROM |
| 384 |
ROMBaseHost = (uint8 *)0x40800000; |
| 385 |
rom_area = create_area(ROM_AREA_NAME, (void **)&ROMBaseHost, B_BASE_ADDRESS, ROM_AREA_SIZE, B_NO_LOCK, B_READ_AREA | B_WRITE_AREA); |
| 386 |
if (rom_area < 0) |
| 387 |
throw area_error(); |
| 388 |
D(bug("ROM area %ld at %p\n", rom_area, ROMBaseHost)); |
| 389 |
|
| 390 |
// Load ROM |
| 391 |
load_rom(); |
| 392 |
} |
| 393 |
|
| 394 |
|
| 395 |
/* |
| 396 |
* Load ROM file |
| 397 |
* |
| 398 |
* file_open_error: Cannot open ROM file |
| 399 |
* file_read_error: Cannot read ROM file |
| 400 |
*/ |
| 401 |
|
| 402 |
void BasiliskII::load_rom(void) |
| 403 |
{ |
| 404 |
// Get rom file path from preferences |
| 405 |
const char *rom_path = PrefsFindString("rom"); |
| 406 |
|
| 407 |
// Try to open ROM file |
| 408 |
BFile file(rom_path ? rom_path : ROM_FILE_NAME, B_READ_ONLY); |
| 409 |
if (file.InitCheck() != B_NO_ERROR) |
| 410 |
throw file_open_error(); |
| 411 |
|
| 412 |
printf(GetString(STR_READING_ROM_FILE)); |
| 413 |
|
| 414 |
// Is the ROM size correct? |
| 415 |
off_t rom_size = 0; |
| 416 |
file.GetSize(&rom_size); |
| 417 |
if (rom_size != 64*1024 && rom_size != 128*1024 && rom_size != 256*1024 && rom_size != 512*1024 && rom_size != 1024*1024) |
| 418 |
throw rom_size_error(); |
| 419 |
|
| 420 |
uint8 *rom = new uint8[rom_size]; // Reading directly into the area doesn't work |
| 421 |
ssize_t actual = file.Read((void *)rom, rom_size); |
| 422 |
if (actual == rom_size) |
| 423 |
memcpy(ROMBaseHost, rom, rom_size); |
| 424 |
delete[] rom; |
| 425 |
if (actual != rom_size) |
| 426 |
throw file_read_error(); |
| 427 |
ROMSize = rom_size; |
| 428 |
} |
| 429 |
|
| 430 |
|
| 431 |
/* |
| 432 |
* Emulator thread function |
| 433 |
*/ |
| 434 |
|
| 435 |
status_t BasiliskII::emul_func(void *arg) |
| 436 |
{ |
| 437 |
BasiliskII *obj = (BasiliskII *)arg; |
| 438 |
|
| 439 |
#if __POWERPC__ |
| 440 |
// Install data access signal handler |
| 441 |
sigemptyset(&obj->sigsegv_action.sa_mask); |
| 442 |
obj->sigsegv_action.sa_handler = (__signal_func_ptr)(obj->sigsegv_invoc); |
| 443 |
obj->sigsegv_action.sa_flags = 0; |
| 444 |
obj->sigsegv_action.sa_userdata = arg; |
| 445 |
sigaction(SIGSEGV, &obj->sigsegv_action, NULL); |
| 446 |
#endif |
| 447 |
|
| 448 |
// Exceptions will send signals |
| 449 |
disable_debugger(true); |
| 450 |
|
| 451 |
// Start 68k and jump to ROM boot routine |
| 452 |
Start680x0(); |
| 453 |
|
| 454 |
// Quit program |
| 455 |
obj->AllowQuitting = true; |
| 456 |
be_app->PostMessage(B_QUIT_REQUESTED); |
| 457 |
return 0; |
| 458 |
} |
| 459 |
|
| 460 |
|
| 461 |
/* |
| 462 |
* Code was patched, flush caches if neccessary (i.e. when using a real 680x0 |
| 463 |
* or a dynamically recompiling emulator) |
| 464 |
*/ |
| 465 |
|
| 466 |
void FlushCodeCache(void *start, uint32 size) |
| 467 |
{ |
| 468 |
} |
| 469 |
|
| 470 |
|
| 471 |
/* |
| 472 |
* Interrupt flags (must be handled atomically!) |
| 473 |
*/ |
| 474 |
|
| 475 |
uint32 InterruptFlags = 0; |
| 476 |
|
| 477 |
void SetInterruptFlag(uint32 flag) |
| 478 |
{ |
| 479 |
atomic_or((int32 *)&InterruptFlags, flag); |
| 480 |
} |
| 481 |
|
| 482 |
void ClearInterruptFlag(uint32 flag) |
| 483 |
{ |
| 484 |
atomic_and((int32 *)&InterruptFlags, ~flag); |
| 485 |
} |
| 486 |
|
| 487 |
|
| 488 |
/* |
| 489 |
* 60Hz thread (really 60.15Hz) |
| 490 |
*/ |
| 491 |
|
| 492 |
status_t BasiliskII::tick_func(void *arg) |
| 493 |
{ |
| 494 |
BasiliskII *obj = (BasiliskII *)arg; |
| 495 |
int tick_counter = 0; |
| 496 |
bigtime_t current = system_time(); |
| 497 |
|
| 498 |
while (obj->tick_thread_active) { |
| 499 |
|
| 500 |
// Wait |
| 501 |
current += 16625; |
| 502 |
snooze_until(current, B_SYSTEM_TIMEBASE); |
| 503 |
|
| 504 |
// Pseudo Mac 1Hz interrupt, update local time |
| 505 |
if (++tick_counter > 60) { |
| 506 |
tick_counter = 0; |
| 507 |
WriteMacInt32(0x20c, TimerDateTime()); |
| 508 |
SetInterruptFlag(INTFLAG_1HZ); |
| 509 |
TriggerInterrupt(); |
| 510 |
} |
| 511 |
|
| 512 |
// Trigger 60Hz interrupt |
| 513 |
SetInterruptFlag(INTFLAG_60HZ); |
| 514 |
TriggerInterrupt(); |
| 515 |
} |
| 516 |
return 0; |
| 517 |
} |
| 518 |
|
| 519 |
|
| 520 |
/* |
| 521 |
* XPRAM watchdog thread (saves XPRAM every minute) |
| 522 |
*/ |
| 523 |
|
| 524 |
status_t BasiliskII::xpram_func(void *arg) |
| 525 |
{ |
| 526 |
uint8 last_xpram[256]; |
| 527 |
memcpy(last_xpram, XPRAM, 256); |
| 528 |
|
| 529 |
while (((BasiliskII *)arg)->xpram_thread_active) { |
| 530 |
snooze(60*1000000); |
| 531 |
if (memcmp(last_xpram, XPRAM, 256)) { |
| 532 |
memcpy(last_xpram, XPRAM, 256); |
| 533 |
SaveXPRAM(); |
| 534 |
} |
| 535 |
} |
| 536 |
return 0; |
| 537 |
} |
| 538 |
|
| 539 |
|
| 540 |
/* |
| 541 |
* Display error alert |
| 542 |
*/ |
| 543 |
|
| 544 |
void ErrorAlert(const char *text) |
| 545 |
{ |
| 546 |
if (PrefsFindBool("nogui")) { |
| 547 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 548 |
return; |
| 549 |
} |
| 550 |
VideoQuitFullScreen(); |
| 551 |
char str[256]; |
| 552 |
sprintf(str, GetString(STR_GUI_ERROR_PREFIX), text); |
| 553 |
BAlert *alert = new BAlert(GetString(STR_ERROR_ALERT_TITLE), str, GetString(STR_QUIT_BUTTON), NULL, NULL, B_WIDTH_AS_USUAL, B_STOP_ALERT); |
| 554 |
alert->Go(); |
| 555 |
} |
| 556 |
|
| 557 |
|
| 558 |
/* |
| 559 |
* Display warning alert |
| 560 |
*/ |
| 561 |
|
| 562 |
void WarningAlert(const char *text) |
| 563 |
{ |
| 564 |
if (PrefsFindBool("nogui")) { |
| 565 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 566 |
return; |
| 567 |
} |
| 568 |
char str[256]; |
| 569 |
sprintf(str, GetString(STR_GUI_WARNING_PREFIX), text); |
| 570 |
BAlert *alert = new BAlert(GetString(STR_WARNING_ALERT_TITLE), str, GetString(STR_OK_BUTTON), NULL, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT); |
| 571 |
alert->Go(); |
| 572 |
} |
| 573 |
|
| 574 |
|
| 575 |
/* |
| 576 |
* Display choice alert |
| 577 |
*/ |
| 578 |
|
| 579 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
| 580 |
{ |
| 581 |
char str[256]; |
| 582 |
sprintf(str, GetString(STR_GUI_WARNING_PREFIX), text); |
| 583 |
BAlert *alert = new BAlert(GetString(STR_WARNING_ALERT_TITLE), str, pos, neg, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT); |
| 584 |
return alert->Go() == 0; |
| 585 |
} |
| 586 |
|
| 587 |
|
| 588 |
/* |
| 589 |
* SEGV handler |
| 590 |
*/ |
| 591 |
|
| 592 |
#if __POWERPC__ |
| 593 |
static uint32 segv_r[32]; |
| 594 |
|
| 595 |
asm void BasiliskII::sigsegv_invoc(register int sig, register void *arg, register vregs *r) |
| 596 |
{ |
| 597 |
mflr r0 |
| 598 |
stw r0,8(r1) |
| 599 |
stwu r1,-56(r1) |
| 600 |
|
| 601 |
lwz r3,segv_r(r2) |
| 602 |
stmw r13,13*4(r3) |
| 603 |
|
| 604 |
mr r3,r5 |
| 605 |
bl sigsegv_handler |
| 606 |
|
| 607 |
lwz r3,segv_r(r2) |
| 608 |
lmw r13,13*4(r3) |
| 609 |
|
| 610 |
lwz r0,56+8(r1) |
| 611 |
mtlr r0 |
| 612 |
addi r1,r1,56 |
| 613 |
blr |
| 614 |
} |
| 615 |
|
| 616 |
static void sigsegv_handler(vregs *r) |
| 617 |
{ |
| 618 |
// Fetch volatile registers |
| 619 |
segv_r[0] = r->r0; |
| 620 |
segv_r[1] = r->r1; |
| 621 |
segv_r[2] = r->r2; |
| 622 |
segv_r[3] = r->r3; |
| 623 |
segv_r[4] = r->r4; |
| 624 |
segv_r[5] = r->r5; |
| 625 |
segv_r[6] = r->r6; |
| 626 |
segv_r[7] = r->r7; |
| 627 |
segv_r[8] = r->r8; |
| 628 |
segv_r[9] = r->r9; |
| 629 |
segv_r[10] = r->r10; |
| 630 |
segv_r[11] = r->r11; |
| 631 |
segv_r[12] = r->r12; |
| 632 |
|
| 633 |
// Get opcode and divide into fields |
| 634 |
uint32 opcode = *(uint32 *)r->pc; |
| 635 |
uint32 primop = opcode >> 26; |
| 636 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 637 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 638 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 639 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 640 |
uint32 imm = opcode & 0xffff; |
| 641 |
|
| 642 |
// Analyze opcode |
| 643 |
enum { |
| 644 |
TYPE_UNKNOWN, |
| 645 |
TYPE_LOAD, |
| 646 |
TYPE_STORE |
| 647 |
} transfer_type = TYPE_UNKNOWN; |
| 648 |
enum { |
| 649 |
SIZE_UNKNOWN, |
| 650 |
SIZE_BYTE, |
| 651 |
SIZE_HALFWORD, |
| 652 |
SIZE_WORD |
| 653 |
} transfer_size = SIZE_UNKNOWN; |
| 654 |
enum { |
| 655 |
MODE_UNKNOWN, |
| 656 |
MODE_NORM, |
| 657 |
MODE_U, |
| 658 |
MODE_X, |
| 659 |
MODE_UX |
| 660 |
} addr_mode = MODE_UNKNOWN; |
| 661 |
switch (primop) { |
| 662 |
case 31: |
| 663 |
switch (exop) { |
| 664 |
case 23: // lwzx |
| 665 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 666 |
case 55: // lwzux |
| 667 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 668 |
case 87: // lbzx |
| 669 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 670 |
case 119: // lbzux |
| 671 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 672 |
case 151: // stwx |
| 673 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 674 |
case 183: // stwux |
| 675 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 676 |
case 215: // stbx |
| 677 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 678 |
case 247: // stbux |
| 679 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 680 |
case 279: // lhzx |
| 681 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 682 |
case 311: // lhzux |
| 683 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 684 |
case 343: // lhax |
| 685 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 686 |
case 375: // lhaux |
| 687 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 688 |
case 407: // sthx |
| 689 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 690 |
case 439: // sthux |
| 691 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 692 |
} |
| 693 |
break; |
| 694 |
|
| 695 |
case 32: // lwz |
| 696 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 697 |
case 33: // lwzu |
| 698 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 699 |
case 34: // lbz |
| 700 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 701 |
case 35: // lbzu |
| 702 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 703 |
case 36: // stw |
| 704 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 705 |
case 37: // stwu |
| 706 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 707 |
case 38: // stb |
| 708 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 709 |
case 39: // stbu |
| 710 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 711 |
case 40: // lhz |
| 712 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 713 |
case 41: // lhzu |
| 714 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 715 |
case 42: // lha |
| 716 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 717 |
case 43: // lhau |
| 718 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 719 |
case 44: // sth |
| 720 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 721 |
case 45: // sthu |
| 722 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 723 |
} |
| 724 |
|
| 725 |
// Calculate effective address |
| 726 |
uint32 addr = 0; |
| 727 |
switch (addr_mode) { |
| 728 |
case MODE_X: |
| 729 |
case MODE_UX: |
| 730 |
if (ra == 0) |
| 731 |
addr = segv_r[rb]; |
| 732 |
else |
| 733 |
addr = segv_r[ra] + segv_r[rb]; |
| 734 |
break; |
| 735 |
case MODE_NORM: |
| 736 |
case MODE_U: |
| 737 |
if (ra == 0) |
| 738 |
addr = (int32)(int16)imm; |
| 739 |
else |
| 740 |
addr = segv_r[ra] + (int32)(int16)imm; |
| 741 |
break; |
| 742 |
} |
| 743 |
|
| 744 |
// Ignore ROM writes |
| 745 |
if (transfer_type == TYPE_STORE && addr >= (uint32)ROMBaseHost && addr < (uint32)ROMBaseHost + ROMSize) { |
| 746 |
// D(bug("WARNING: %s write access to ROM at %p, 68k pc %p\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->pc)); |
| 747 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 748 |
segv_r[ra] = addr; |
| 749 |
r->pc += 4; |
| 750 |
goto rti; |
| 751 |
} |
| 752 |
|
| 753 |
// For all other errors, jump into debugger |
| 754 |
char str[256]; |
| 755 |
sprintf(str, "SIGSEGV\n" |
| 756 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 757 |
" xer %08lx cr %08lx fpscr %08lx\n" |
| 758 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 759 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 760 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 761 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 762 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 763 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 764 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 765 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 766 |
r->pc, r->lr, r->ctr, r->msr, |
| 767 |
r->xer, r->cr, r->fpscr, |
| 768 |
r->r0, r->r1, r->r2, r->r3, |
| 769 |
r->r4, r->r5, r->r6, r->r7, |
| 770 |
r->r8, r->r9, r->r10, r->r11, |
| 771 |
r->r12, segv_r[13], segv_r[14], segv_r[15], |
| 772 |
segv_r[16], segv_r[17], segv_r[18], segv_r[19], |
| 773 |
segv_r[20], segv_r[21], segv_r[22], segv_r[23], |
| 774 |
segv_r[24], segv_r[25], segv_r[26], segv_r[27], |
| 775 |
segv_r[28], segv_r[29], segv_r[30], segv_r[31]); |
| 776 |
disable_debugger(false); |
| 777 |
debugger(str); |
| 778 |
QuitEmulator(); |
| 779 |
return; |
| 780 |
|
| 781 |
rti: |
| 782 |
// Restore volatile registers |
| 783 |
r->r0 = segv_r[0]; |
| 784 |
r->r1 = segv_r[1]; |
| 785 |
r->r2 = segv_r[2]; |
| 786 |
r->r3 = segv_r[3]; |
| 787 |
r->r4 = segv_r[4]; |
| 788 |
r->r5 = segv_r[5]; |
| 789 |
r->r6 = segv_r[6]; |
| 790 |
r->r7 = segv_r[7]; |
| 791 |
r->r8 = segv_r[8]; |
| 792 |
r->r9 = segv_r[9]; |
| 793 |
r->r10 = segv_r[10]; |
| 794 |
r->r11 = segv_r[11]; |
| 795 |
r->r12 = segv_r[12]; |
| 796 |
} |
| 797 |
#endif |
