| 1 |
/* |
| 2 |
* main_unix.cpp - Emulation core, Unix implementation |
| 3 |
* |
| 4 |
* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig |
| 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 |
/* |
| 22 |
* NOTES: |
| 23 |
* |
| 24 |
* See main_beos.cpp for a description of the three operating modes. |
| 25 |
* |
| 26 |
* In addition to that, we have to handle the fact that the MacOS ABI |
| 27 |
* is slightly different from the SysV ABI used by Linux: |
| 28 |
* - Stack frames are different (e.g. LR is stored in 8(r1) under |
| 29 |
* MacOS, but in 4(r1) under Linux) |
| 30 |
* - There is no TOC under Linux; r2 is free for the user |
| 31 |
* - r13 is used as a small data pointer under Linux (but appearently |
| 32 |
* it is not used this way? To be sure, we specify -msdata=none |
| 33 |
* in the Makefile) |
| 34 |
* - As there is no TOC, there are also no TVECTs under Linux; |
| 35 |
* function pointers point directly to the function code |
| 36 |
* The Execute*() functions have to account for this. Additionally, we |
| 37 |
* cannot simply call MacOS functions by getting their TVECT and jumping |
| 38 |
* to it. Such calls are done via the call_macos*() functions in |
| 39 |
* asm_linux.S that create a MacOS stack frame, load the TOC pointer |
| 40 |
* and put the arguments into the right registers. |
| 41 |
* |
| 42 |
* As on the BeOS, we have to specify an alternate signal stack because |
| 43 |
* interrupts (and, under Linux, Low Memory accesses) may occur when r1 |
| 44 |
* is pointing to the Kernel Data or to Low Memory. There is one |
| 45 |
* problem, however, due to the alternate signal stack being global to |
| 46 |
* all signal handlers. Consider the following scenario: |
| 47 |
* - The main thread is executing some native PPC MacOS code in |
| 48 |
* MODE_NATIVE, running on the MacOS stack (somewhere in the Mac RAM). |
| 49 |
* - A SIGUSR2 interrupt occurs. The kernel switches to the signal |
| 50 |
* stack and starts executing the SIGUSR2 signal handler. |
| 51 |
* - The signal handler sees the MODE_NATIVE and calls ppc_interrupt() |
| 52 |
* to handle a native interrupt. |
| 53 |
* - ppc_interrupt() sets r1 to point to the Kernel Data and jumps to |
| 54 |
* the nanokernel. |
| 55 |
* - The nanokernel accesses a Low Memory global (most likely one of |
| 56 |
* the XLMs), a SIGSEGV occurs. |
| 57 |
* - The kernel sees that r1 does not point to the signal stack and |
| 58 |
* switches to the signal stack again, thus overwriting the data that |
| 59 |
* the SIGUSR2 handler put there. |
| 60 |
* The same problem arises when calling ExecutePPC() inside the MODE_EMUL_OP |
| 61 |
* interrupt handler. |
| 62 |
* |
| 63 |
* The solution is to set the signal stack to a second, "extra" stack |
| 64 |
* inside the SIGUSR2 handler before entering the Nanokernel or calling |
| 65 |
* ExecutePPC (or any function that might cause a mode switch). The signal |
| 66 |
* stack is restored before exiting the SIGUSR2 handler. |
| 67 |
* |
| 68 |
* TODO: |
| 69 |
* check if SIGSEGV handler works for all registers (including FP!) |
| 70 |
*/ |
| 71 |
|
| 72 |
#include <unistd.h> |
| 73 |
#include <fcntl.h> |
| 74 |
#include <time.h> |
| 75 |
#include <errno.h> |
| 76 |
#include <stdio.h> |
| 77 |
#include <stdlib.h> |
| 78 |
#include <string.h> |
| 79 |
#include <pthread.h> |
| 80 |
#include <sys/mman.h> |
| 81 |
#include <sys/ipc.h> |
| 82 |
#include <sys/shm.h> |
| 83 |
#include <signal.h> |
| 84 |
|
| 85 |
#include "sysdeps.h" |
| 86 |
#include "main.h" |
| 87 |
#include "version.h" |
| 88 |
#include "prefs.h" |
| 89 |
#include "prefs_editor.h" |
| 90 |
#include "cpu_emulation.h" |
| 91 |
#include "emul_op.h" |
| 92 |
#include "xlowmem.h" |
| 93 |
#include "xpram.h" |
| 94 |
#include "timer.h" |
| 95 |
#include "adb.h" |
| 96 |
#include "sony.h" |
| 97 |
#include "disk.h" |
| 98 |
#include "cdrom.h" |
| 99 |
#include "scsi.h" |
| 100 |
#include "video.h" |
| 101 |
#include "audio.h" |
| 102 |
#include "ether.h" |
| 103 |
#include "serial.h" |
| 104 |
#include "clip.h" |
| 105 |
#include "extfs.h" |
| 106 |
#include "sys.h" |
| 107 |
#include "macos_util.h" |
| 108 |
#include "rom_patches.h" |
| 109 |
#include "user_strings.h" |
| 110 |
|
| 111 |
#define DEBUG 0 |
| 112 |
#include "debug.h" |
| 113 |
|
| 114 |
|
| 115 |
#include <X11/Xlib.h> |
| 116 |
|
| 117 |
#ifdef ENABLE_GTK |
| 118 |
#include <gtk/gtk.h> |
| 119 |
#endif |
| 120 |
|
| 121 |
#ifdef ENABLE_XF86_DGA |
| 122 |
#include <X11/Xlib.h> |
| 123 |
#include <X11/Xutil.h> |
| 124 |
#include <X11/extensions/xf86dga.h> |
| 125 |
#endif |
| 126 |
|
| 127 |
#ifdef ENABLE_MON |
| 128 |
#include "mon.h" |
| 129 |
#endif |
| 130 |
|
| 131 |
|
| 132 |
// Enable Execute68k() safety checks? |
| 133 |
#define SAFE_EXEC_68K 0 |
| 134 |
|
| 135 |
// Interrupts in EMUL_OP mode? |
| 136 |
#define INTERRUPTS_IN_EMUL_OP_MODE 1 |
| 137 |
|
| 138 |
// Interrupts in native mode? |
| 139 |
#define INTERRUPTS_IN_NATIVE_MODE 1 |
| 140 |
|
| 141 |
|
| 142 |
// Constants |
| 143 |
const char ROM_FILE_NAME[] = "ROM"; |
| 144 |
const char ROM_FILE_NAME2[] = "Mac OS ROM"; |
| 145 |
|
| 146 |
const uint32 ROM_AREA_SIZE = 0x500000; // Size of ROM area |
| 147 |
const uint32 ROM_END = ROM_BASE + ROM_SIZE; // End of ROM |
| 148 |
|
| 149 |
const uint32 KERNEL_DATA_BASE = 0x68ffe000; // Address of Kernel Data |
| 150 |
const uint32 KERNEL_DATA2_BASE = 0x5fffe000; // Alternate address of Kernel Data |
| 151 |
const uint32 KERNEL_AREA_SIZE = 0x2000; // Size of Kernel Data area |
| 152 |
|
| 153 |
const uint32 SIG_STACK_SIZE = 0x10000; // Size of signal stack |
| 154 |
|
| 155 |
|
| 156 |
// 68k Emulator Data |
| 157 |
struct EmulatorData { |
| 158 |
uint32 v[0x400]; |
| 159 |
}; |
| 160 |
|
| 161 |
|
| 162 |
// Kernel Data |
| 163 |
struct KernelData { |
| 164 |
uint32 v[0x400]; |
| 165 |
EmulatorData ed; |
| 166 |
}; |
| 167 |
|
| 168 |
|
| 169 |
#if !EMULATED_PPC |
| 170 |
// Structure in which registers are saved in a signal handler; |
| 171 |
// sigcontext->regs points to it |
| 172 |
// (see arch/ppc/kernel/signal.c) |
| 173 |
typedef struct { |
| 174 |
uint32 u[4]; |
| 175 |
} __attribute((aligned(16))) vector128; |
| 176 |
#include <linux/elf.h> |
| 177 |
|
| 178 |
struct sigregs { |
| 179 |
elf_gregset_t gp_regs; // Identical to pt_regs |
| 180 |
double fp_regs[ELF_NFPREG]; // f0..f31 and fpsrc |
| 181 |
//more (uninteresting) stuff following here |
| 182 |
}; |
| 183 |
#endif |
| 184 |
|
| 185 |
|
| 186 |
// Global variables (exported) |
| 187 |
#if !EMULATED_PPC |
| 188 |
void *TOC; // Small data pointer (r13) |
| 189 |
#endif |
| 190 |
uint32 RAMBase; // Base address of Mac RAM |
| 191 |
uint32 RAMSize; // Size of Mac RAM |
| 192 |
uint32 KernelDataAddr; // Address of Kernel Data |
| 193 |
uint32 BootGlobsAddr; // Address of BootGlobs structure at top of Mac RAM |
| 194 |
uint32 PVR; // Theoretical PVR |
| 195 |
int64 CPUClockSpeed; // Processor clock speed (Hz) |
| 196 |
int64 BusClockSpeed; // Bus clock speed (Hz) |
| 197 |
|
| 198 |
|
| 199 |
// Global variables |
| 200 |
static char *x_display_name = NULL; // X11 display name |
| 201 |
Display *x_display = NULL; // X11 display handle |
| 202 |
|
| 203 |
static int zero_fd = 0; // FD of /dev/zero |
| 204 |
static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped |
| 205 |
static int kernel_area = -1; // SHM ID of Kernel Data area |
| 206 |
static bool rom_area_mapped = false; // Flag: Mac ROM mmap()ped |
| 207 |
static bool ram_area_mapped = false; // Flag: Mac RAM mmap()ped |
| 208 |
static void *mmap_RAMBase = NULL; // Base address of mmap()ed RAM area |
| 209 |
static KernelData *kernel_data; // Pointer to Kernel Data |
| 210 |
static EmulatorData *emulator_data; |
| 211 |
|
| 212 |
static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes |
| 213 |
|
| 214 |
static bool nvram_thread_active = false; // Flag: NVRAM watchdog installed |
| 215 |
static pthread_t nvram_thread; // NVRAM watchdog |
| 216 |
static bool tick_thread_active = false; // Flag: MacOS thread installed |
| 217 |
static pthread_t tick_thread; // 60Hz thread |
| 218 |
static pthread_t emul_thread; // MacOS thread |
| 219 |
|
| 220 |
static bool ready_for_signals = false; // Handler installed, signals can be sent |
| 221 |
static int64 num_segv = 0; // Number of handled SEGV signals |
| 222 |
|
| 223 |
#if !EMULATED_PPC |
| 224 |
static struct sigaction sigusr2_action; // Interrupt signal (of emulator thread) |
| 225 |
static struct sigaction sigsegv_action; // Data access exception signal (of emulator thread) |
| 226 |
static struct sigaction sigill_action; // Illegal instruction signal (of emulator thread) |
| 227 |
static void *sig_stack = NULL; // Stack for signal handlers |
| 228 |
static void *extra_stack = NULL; // Stack for SIGSEGV inside interrupt handler |
| 229 |
static bool emul_thread_fatal = false; // Flag: MacOS thread crashed, tick thread shall dump debug output |
| 230 |
static sigregs sigsegv_regs; // Register dump when crashed |
| 231 |
#endif |
| 232 |
|
| 233 |
|
| 234 |
// Prototypes |
| 235 |
static void Quit(void); |
| 236 |
static void *emul_func(void *arg); |
| 237 |
static void *nvram_func(void *arg); |
| 238 |
static void *tick_func(void *arg); |
| 239 |
#if !EMULATED_PPC |
| 240 |
static void sigusr2_handler(int sig, sigcontext_struct *sc); |
| 241 |
static void sigsegv_handler(int sig, sigcontext_struct *sc); |
| 242 |
static void sigill_handler(int sig, sigcontext_struct *sc); |
| 243 |
#endif |
| 244 |
|
| 245 |
|
| 246 |
// From asm_linux.S |
| 247 |
#if EMULATED_PPC |
| 248 |
extern int atomic_add(int *var, int v); |
| 249 |
extern int atomic_and(int *var, int v); |
| 250 |
extern int atomic_or(int *var, int v); |
| 251 |
#else |
| 252 |
extern "C" void *get_toc(void); |
| 253 |
extern "C" void *get_sp(void); |
| 254 |
extern "C" void flush_icache_range(void *start, void *end); |
| 255 |
extern "C" void jump_to_rom(uint32 entry, uint32 context); |
| 256 |
extern "C" void quit_emulator(void); |
| 257 |
extern "C" void execute_68k(uint32 pc, M68kRegisters *r); |
| 258 |
extern "C" void ppc_interrupt(uint32 entry, uint32 kernel_data); |
| 259 |
extern "C" int atomic_add(int *var, int v); |
| 260 |
extern "C" int atomic_and(int *var, int v); |
| 261 |
extern "C" int atomic_or(int *var, int v); |
| 262 |
extern void paranoia_check(void); |
| 263 |
#endif |
| 264 |
|
| 265 |
|
| 266 |
// Decode LZSS data |
| 267 |
static void decode_lzss(const uint8 *src, uint8 *dest, int size) |
| 268 |
{ |
| 269 |
char dict[0x1000]; |
| 270 |
int run_mask = 0, dict_idx = 0xfee; |
| 271 |
for (;;) { |
| 272 |
if (run_mask < 0x100) { |
| 273 |
// Start new run |
| 274 |
if (--size < 0) |
| 275 |
break; |
| 276 |
run_mask = *src++ | 0xff00; |
| 277 |
} |
| 278 |
bool bit = run_mask & 1; |
| 279 |
run_mask >>= 1; |
| 280 |
if (bit) { |
| 281 |
// Verbatim copy |
| 282 |
if (--size < 0) |
| 283 |
break; |
| 284 |
int c = *src++; |
| 285 |
dict[dict_idx++] = c; |
| 286 |
*dest++ = c; |
| 287 |
dict_idx &= 0xfff; |
| 288 |
} else { |
| 289 |
// Copy from dictionary |
| 290 |
if (--size < 0) |
| 291 |
break; |
| 292 |
int idx = *src++; |
| 293 |
if (--size < 0) |
| 294 |
break; |
| 295 |
int cnt = *src++; |
| 296 |
idx |= (cnt << 4) & 0xf00; |
| 297 |
cnt = (cnt & 0x0f) + 3; |
| 298 |
while (cnt--) { |
| 299 |
char c = dict[idx++]; |
| 300 |
dict[dict_idx++] = c; |
| 301 |
*dest++ = c; |
| 302 |
idx &= 0xfff; |
| 303 |
dict_idx &= 0xfff; |
| 304 |
} |
| 305 |
} |
| 306 |
} |
| 307 |
} |
| 308 |
|
| 309 |
|
| 310 |
/* |
| 311 |
* Main program |
| 312 |
*/ |
| 313 |
|
| 314 |
static void usage(const char *prg_name) |
| 315 |
{ |
| 316 |
printf("Usage: %s [OPTION...]\n", prg_name); |
| 317 |
printf("\nUnix options:\n"); |
| 318 |
printf(" --display STRING\n X display to use\n"); |
| 319 |
PrefsPrintUsage(); |
| 320 |
exit(0); |
| 321 |
} |
| 322 |
|
| 323 |
int main(int argc, char **argv) |
| 324 |
{ |
| 325 |
char str[256]; |
| 326 |
uint32 *boot_globs; |
| 327 |
int16 i16; |
| 328 |
int drive, driver; |
| 329 |
int rom_fd; |
| 330 |
FILE *proc_file; |
| 331 |
const char *rom_path; |
| 332 |
uint32 rom_size, actual; |
| 333 |
uint8 *rom_tmp; |
| 334 |
time_t now, expire; |
| 335 |
|
| 336 |
// Initialize variables |
| 337 |
RAMBase = 0; |
| 338 |
mmap_RAMBase = NULL; |
| 339 |
tzset(); |
| 340 |
|
| 341 |
// Print some info |
| 342 |
printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR); |
| 343 |
printf(" %s\n", GetString(STR_ABOUT_TEXT2)); |
| 344 |
|
| 345 |
#if !EMULATED_PPC |
| 346 |
// Get TOC pointer |
| 347 |
TOC = get_toc(); |
| 348 |
#endif |
| 349 |
|
| 350 |
#ifdef ENABLE_GTK |
| 351 |
// Init GTK |
| 352 |
gtk_set_locale(); |
| 353 |
gtk_init(&argc, &argv); |
| 354 |
#endif |
| 355 |
|
| 356 |
// Read preferences |
| 357 |
PrefsInit(argc, argv); |
| 358 |
|
| 359 |
// Parse command line arguments |
| 360 |
for (int i=1; i<argc; i++) { |
| 361 |
if (strcmp(argv[i], "--help") == 0) { |
| 362 |
usage(argv[0]); |
| 363 |
} else if (strcmp(argv[i], "--display") == 0) { |
| 364 |
i++; |
| 365 |
if (i < argc) |
| 366 |
x_display_name = strdup(argv[i]); |
| 367 |
} else if (argv[i][0] == '-') { |
| 368 |
fprintf(stderr, "Unrecognized option '%s'\n", argv[i]); |
| 369 |
usage(argv[0]); |
| 370 |
} |
| 371 |
} |
| 372 |
|
| 373 |
// Open display |
| 374 |
x_display = XOpenDisplay(x_display_name); |
| 375 |
if (x_display == NULL) { |
| 376 |
char str[256]; |
| 377 |
sprintf(str, GetString(STR_NO_XSERVER_ERR), XDisplayName(x_display_name)); |
| 378 |
ErrorAlert(str); |
| 379 |
goto quit; |
| 380 |
} |
| 381 |
|
| 382 |
#if defined(ENABLE_XF86_DGA) && !defined(ENABLE_MON) |
| 383 |
// Fork out, so we can return from fullscreen mode when things get ugly |
| 384 |
XF86DGAForkApp(DefaultScreen(x_display)); |
| 385 |
#endif |
| 386 |
|
| 387 |
#ifdef ENABLE_MON |
| 388 |
// Initialize mon |
| 389 |
mon_init(); |
| 390 |
#endif |
| 391 |
|
| 392 |
// Get system info |
| 393 |
PVR = 0x00040000; // Default: 604 |
| 394 |
CPUClockSpeed = 100000000; // Default: 100MHz |
| 395 |
BusClockSpeed = 100000000; // Default: 100MHz |
| 396 |
#if !EMULATED_PPC |
| 397 |
proc_file = fopen("/proc/cpuinfo", "r"); |
| 398 |
if (proc_file) { |
| 399 |
char line[256]; |
| 400 |
while(fgets(line, 255, proc_file)) { |
| 401 |
// Read line |
| 402 |
int len = strlen(line); |
| 403 |
if (len == 0) |
| 404 |
continue; |
| 405 |
line[len-1] = 0; |
| 406 |
|
| 407 |
// Parse line |
| 408 |
int i; |
| 409 |
char value[256]; |
| 410 |
if (sscanf(line, "cpu : %s", value) == 1) { |
| 411 |
if (strcmp(value, "601") == 0) |
| 412 |
PVR = 0x00010000; |
| 413 |
else if (strcmp(value, "603") == 0) |
| 414 |
PVR = 0x00030000; |
| 415 |
else if (strcmp(value, "604") == 0) |
| 416 |
PVR = 0x00040000; |
| 417 |
else if (strcmp(value, "603e") == 0) |
| 418 |
PVR = 0x00060000; |
| 419 |
else if (strcmp(value, "603ev") == 0) |
| 420 |
PVR = 0x00070000; |
| 421 |
else if (strcmp(value, "604e") == 0) |
| 422 |
PVR = 0x00090000; |
| 423 |
else if (strcmp(value, "604ev5") == 0) |
| 424 |
PVR = 0x000a0000; |
| 425 |
else if (strcmp(value, "750") == 0) |
| 426 |
PVR = 0x00080000; |
| 427 |
else if (strcmp(value, "821") == 0) |
| 428 |
PVR = 0x00320000; |
| 429 |
else if (strcmp(value, "860") == 0) |
| 430 |
PVR = 0x00500000; |
| 431 |
else |
| 432 |
printf("WARNING: Unknown CPU type '%s', assuming 604\n", value); |
| 433 |
} |
| 434 |
if (sscanf(line, "clock : %dMHz", &i) == 1) |
| 435 |
CPUClockSpeed = BusClockSpeed = i * 1000000; |
| 436 |
} |
| 437 |
fclose(proc_file); |
| 438 |
} else { |
| 439 |
sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno)); |
| 440 |
WarningAlert(str); |
| 441 |
} |
| 442 |
#endif |
| 443 |
D(bug("PVR: %08x (assumed)\n", PVR)); |
| 444 |
|
| 445 |
// Init system routines |
| 446 |
SysInit(); |
| 447 |
|
| 448 |
// Show preferences editor |
| 449 |
if (!PrefsFindBool("nogui")) |
| 450 |
if (!PrefsEditor()) |
| 451 |
goto quit; |
| 452 |
|
| 453 |
#if !EMULATED_PPC |
| 454 |
// Check some things |
| 455 |
paranoia_check(); |
| 456 |
#endif |
| 457 |
|
| 458 |
// Open /dev/zero |
| 459 |
zero_fd = open("/dev/zero", O_RDWR); |
| 460 |
if (zero_fd < 0) { |
| 461 |
sprintf(str, GetString(STR_NO_DEV_ZERO_ERR), strerror(errno)); |
| 462 |
ErrorAlert(str); |
| 463 |
goto quit; |
| 464 |
} |
| 465 |
|
| 466 |
// Create Low Memory area (0x0000..0x3000) |
| 467 |
if (mmap((char *)0x0000, 0x3000, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0) == (void *)-1) { |
| 468 |
sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno)); |
| 469 |
ErrorAlert(str); |
| 470 |
goto quit; |
| 471 |
} |
| 472 |
lm_area_mapped = true; |
| 473 |
|
| 474 |
// Create areas for Kernel Data |
| 475 |
kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600); |
| 476 |
if (kernel_area == -1) { |
| 477 |
sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno)); |
| 478 |
ErrorAlert(str); |
| 479 |
goto quit; |
| 480 |
} |
| 481 |
if (shmat(kernel_area, (void *)KERNEL_DATA_BASE, 0) < 0) { |
| 482 |
sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno)); |
| 483 |
ErrorAlert(str); |
| 484 |
goto quit; |
| 485 |
} |
| 486 |
if (shmat(kernel_area, (void *)KERNEL_DATA2_BASE, 0) < 0) { |
| 487 |
sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno)); |
| 488 |
ErrorAlert(str); |
| 489 |
goto quit; |
| 490 |
} |
| 491 |
kernel_data = (KernelData *)0x68ffe000; |
| 492 |
emulator_data = &kernel_data->ed; |
| 493 |
KernelDataAddr = (uint32)kernel_data; |
| 494 |
D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data)); |
| 495 |
|
| 496 |
// Create area for Mac ROM |
| 497 |
if (mmap((char *)ROM_BASE, ROM_AREA_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0) == (void *)-1) { |
| 498 |
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno)); |
| 499 |
ErrorAlert(str); |
| 500 |
goto quit; |
| 501 |
} |
| 502 |
rom_area_mapped = true; |
| 503 |
D(bug("ROM area at %08x\n", ROM_BASE)); |
| 504 |
|
| 505 |
// Create area for Mac RAM |
| 506 |
RAMSize = PrefsFindInt32("ramsize"); |
| 507 |
if (RAMSize < 8*1024*1024) { |
| 508 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
| 509 |
RAMSize = 8*1024*1024; |
| 510 |
} |
| 511 |
|
| 512 |
mmap_RAMBase = mmap((void *)0x20000000, RAMSize, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0); |
| 513 |
if (mmap_RAMBase == (void *)-1) { |
| 514 |
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno)); |
| 515 |
ErrorAlert(str); |
| 516 |
goto quit; |
| 517 |
} |
| 518 |
RAMBase = (uint32)mmap_RAMBase; |
| 519 |
ram_area_mapped = true; |
| 520 |
D(bug("RAM area at %08x\n", RAMBase)); |
| 521 |
|
| 522 |
if (RAMBase > ROM_BASE) { |
| 523 |
ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR)); |
| 524 |
goto quit; |
| 525 |
} |
| 526 |
|
| 527 |
// Load Mac ROM |
| 528 |
rom_path = PrefsFindString("rom"); |
| 529 |
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY); |
| 530 |
if (rom_fd < 0) { |
| 531 |
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME2, O_RDONLY); |
| 532 |
if (rom_fd < 0) { |
| 533 |
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR)); |
| 534 |
goto quit; |
| 535 |
} |
| 536 |
} |
| 537 |
printf(GetString(STR_READING_ROM_FILE)); |
| 538 |
rom_size = lseek(rom_fd, 0, SEEK_END); |
| 539 |
lseek(rom_fd, 0, SEEK_SET); |
| 540 |
rom_tmp = new uint8[ROM_SIZE]; |
| 541 |
actual = read(rom_fd, (void *)rom_tmp, ROM_SIZE); |
| 542 |
close(rom_fd); |
| 543 |
if (actual == ROM_SIZE) { |
| 544 |
// Plain ROM image |
| 545 |
memcpy((void *)ROM_BASE, rom_tmp, ROM_SIZE); |
| 546 |
delete[] rom_tmp; |
| 547 |
} else { |
| 548 |
if (strncmp((char *)rom_tmp, "<CHRP-BOOT>", 11) == 0) { |
| 549 |
// CHRP compressed ROM image |
| 550 |
D(bug("CHRP ROM image\n")); |
| 551 |
uint32 lzss_offset, lzss_size; |
| 552 |
|
| 553 |
char *s = strstr((char *)rom_tmp, "constant lzss-offset"); |
| 554 |
if (s == NULL) { |
| 555 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 556 |
goto quit; |
| 557 |
} |
| 558 |
s -= 7; |
| 559 |
if (sscanf(s, "%06x", &lzss_offset) != 1) { |
| 560 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 561 |
goto quit; |
| 562 |
} |
| 563 |
s = strstr((char *)rom_tmp, "constant lzss-size"); |
| 564 |
if (s == NULL) { |
| 565 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 566 |
goto quit; |
| 567 |
} |
| 568 |
s -= 7; |
| 569 |
if (sscanf(s, "%06x", &lzss_size) != 1) { |
| 570 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 571 |
goto quit; |
| 572 |
} |
| 573 |
D(bug("Offset of compressed data: %08x\n", lzss_offset)); |
| 574 |
D(bug("Size of compressed data: %08x\n", lzss_size)); |
| 575 |
|
| 576 |
D(bug("Uncompressing ROM...\n")); |
| 577 |
decode_lzss(rom_tmp + lzss_offset, (uint8 *)ROM_BASE, lzss_size); |
| 578 |
delete[] rom_tmp; |
| 579 |
} else if (rom_size != 4*1024*1024) { |
| 580 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
| 581 |
goto quit; |
| 582 |
} else { |
| 583 |
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR)); |
| 584 |
goto quit; |
| 585 |
} |
| 586 |
} |
| 587 |
|
| 588 |
// Load NVRAM |
| 589 |
XPRAMInit(); |
| 590 |
|
| 591 |
// Set boot volume |
| 592 |
drive = PrefsFindInt32("bootdrive"); |
| 593 |
XPRAM[0x1378] = i16 >> 8; |
| 594 |
XPRAM[0x1379] = i16 & 0xff; |
| 595 |
driver = PrefsFindInt32("bootdriver"); |
| 596 |
XPRAM[0x137a] = i16 >> 8; |
| 597 |
XPRAM[0x137b] = i16 & 0xff; |
| 598 |
|
| 599 |
// Create BootGlobs at top of Mac memory |
| 600 |
memset((void *)(RAMBase + RAMSize - 4096), 0, 4096); |
| 601 |
BootGlobsAddr = RAMBase + RAMSize - 0x1c; |
| 602 |
boot_globs = (uint32 *)BootGlobsAddr; |
| 603 |
boot_globs[-5] = htonl(RAMBase + RAMSize); // MemTop |
| 604 |
boot_globs[0] = htonl(RAMBase); // First RAM bank |
| 605 |
boot_globs[1] = htonl(RAMSize); |
| 606 |
boot_globs[2] = htonl((uint32)-1); // End of bank table |
| 607 |
|
| 608 |
// Init drivers |
| 609 |
SonyInit(); |
| 610 |
DiskInit(); |
| 611 |
CDROMInit(); |
| 612 |
SCSIInit(); |
| 613 |
|
| 614 |
// Init external file system |
| 615 |
ExtFSInit(); |
| 616 |
|
| 617 |
// Init audio |
| 618 |
AudioInit(); |
| 619 |
|
| 620 |
// Init network |
| 621 |
EtherInit(); |
| 622 |
|
| 623 |
// Init serial ports |
| 624 |
SerialInit(); |
| 625 |
|
| 626 |
// Init Time Manager |
| 627 |
TimerInit(); |
| 628 |
|
| 629 |
// Init clipboard |
| 630 |
ClipInit(); |
| 631 |
|
| 632 |
// Init video |
| 633 |
if (!VideoInit()) |
| 634 |
goto quit; |
| 635 |
|
| 636 |
// Install ROM patches |
| 637 |
if (!PatchROM()) { |
| 638 |
ErrorAlert(GetString(STR_UNSUPPORTED_ROM_TYPE_ERR)); |
| 639 |
goto quit; |
| 640 |
} |
| 641 |
|
| 642 |
// Clear caches (as we loaded and patched code) and write protect ROM |
| 643 |
#if !EMULATED_PPC |
| 644 |
MakeExecutable(0, (void *)ROM_BASE, ROM_AREA_SIZE); |
| 645 |
#endif |
| 646 |
mprotect((char *)ROM_BASE, ROM_AREA_SIZE, PROT_EXEC | PROT_READ); |
| 647 |
|
| 648 |
// Initialize Kernel Data |
| 649 |
memset(kernel_data, 0, sizeof(KernelData)); |
| 650 |
if (ROMType == ROMTYPE_NEWWORLD) { |
| 651 |
static uint32 of_dev_tree[4] = {0, 0, 0, 0}; |
| 652 |
static uint8 vector_lookup_tbl[128]; |
| 653 |
static uint8 vector_mask_tbl[64]; |
| 654 |
memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80); |
| 655 |
memset(vector_lookup_tbl, 0, 128); |
| 656 |
memset(vector_mask_tbl, 0, 64); |
| 657 |
kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE); |
| 658 |
kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree); // OF device tree base |
| 659 |
kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl); |
| 660 |
kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl); |
| 661 |
kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE); // OpenPIC base |
| 662 |
kernel_data->v[0xbb0 >> 2] = htonl(0); // ADB base |
| 663 |
kernel_data->v[0xc20 >> 2] = htonl(RAMSize); |
| 664 |
kernel_data->v[0xc24 >> 2] = htonl(RAMSize); |
| 665 |
kernel_data->v[0xc30 >> 2] = htonl(RAMSize); |
| 666 |
kernel_data->v[0xc34 >> 2] = htonl(RAMSize); |
| 667 |
kernel_data->v[0xc38 >> 2] = htonl(0x00010020); |
| 668 |
kernel_data->v[0xc3c >> 2] = htonl(0x00200001); |
| 669 |
kernel_data->v[0xc40 >> 2] = htonl(0x00010000); |
| 670 |
kernel_data->v[0xc50 >> 2] = htonl(RAMBase); |
| 671 |
kernel_data->v[0xc54 >> 2] = htonl(RAMSize); |
| 672 |
kernel_data->v[0xf60 >> 2] = htonl(PVR); |
| 673 |
kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed); |
| 674 |
kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed); |
| 675 |
kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed); |
| 676 |
} else { |
| 677 |
kernel_data->v[0xc80 >> 2] = htonl(RAMSize); |
| 678 |
kernel_data->v[0xc84 >> 2] = htonl(RAMSize); |
| 679 |
kernel_data->v[0xc90 >> 2] = htonl(RAMSize); |
| 680 |
kernel_data->v[0xc94 >> 2] = htonl(RAMSize); |
| 681 |
kernel_data->v[0xc98 >> 2] = htonl(0x00010020); |
| 682 |
kernel_data->v[0xc9c >> 2] = htonl(0x00200001); |
| 683 |
kernel_data->v[0xca0 >> 2] = htonl(0x00010000); |
| 684 |
kernel_data->v[0xcb0 >> 2] = htonl(RAMBase); |
| 685 |
kernel_data->v[0xcb4 >> 2] = htonl(RAMSize); |
| 686 |
kernel_data->v[0xf80 >> 2] = htonl(PVR); |
| 687 |
kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed); |
| 688 |
kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed); |
| 689 |
kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed); |
| 690 |
} |
| 691 |
|
| 692 |
// Initialize extra low memory |
| 693 |
D(bug("Initializing Low Memory...\n")); |
| 694 |
memset(NULL, 0, 0x3000); |
| 695 |
WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h')); // Signature to detect SheepShaver |
| 696 |
WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data); // For trap replacement routines |
| 697 |
WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR |
| 698 |
WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch |
| 699 |
WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode) |
| 700 |
#if !EMULATED_PPC |
| 701 |
WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
| 702 |
WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule); // DLPI ethernet driver functions |
| 703 |
WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule); |
| 704 |
WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open); |
| 705 |
WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close); |
| 706 |
WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput); |
| 707 |
WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv); |
| 708 |
WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO); |
| 709 |
#endif |
| 710 |
D(bug("Low Memory initialized\n")); |
| 711 |
|
| 712 |
// Start 60Hz thread |
| 713 |
tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0); |
| 714 |
D(bug("Tick thread installed (%ld)\n", tick_thread)); |
| 715 |
|
| 716 |
// Start NVRAM watchdog thread |
| 717 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
| 718 |
nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0); |
| 719 |
D(bug("NVRAM thread installed (%ld)\n", nvram_thread)); |
| 720 |
|
| 721 |
#if !EMULATED_PPC |
| 722 |
// Create and install stacks for signal handlers |
| 723 |
sig_stack = malloc(SIG_STACK_SIZE); |
| 724 |
D(bug("Signal stack at %p\n", sig_stack)); |
| 725 |
if (sig_stack == NULL) { |
| 726 |
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR)); |
| 727 |
goto quit; |
| 728 |
} |
| 729 |
extra_stack = malloc(SIG_STACK_SIZE); |
| 730 |
D(bug("Extra stack at %p\n", extra_stack)); |
| 731 |
if (extra_stack == NULL) { |
| 732 |
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR)); |
| 733 |
goto quit; |
| 734 |
} |
| 735 |
struct sigaltstack new_stack; |
| 736 |
new_stack.ss_sp = sig_stack; |
| 737 |
new_stack.ss_flags = 0; |
| 738 |
new_stack.ss_size = SIG_STACK_SIZE; |
| 739 |
if (sigaltstack(&new_stack, NULL) < 0) { |
| 740 |
sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno)); |
| 741 |
ErrorAlert(str); |
| 742 |
goto quit; |
| 743 |
} |
| 744 |
#endif |
| 745 |
|
| 746 |
#if !EMULATED_PPC |
| 747 |
// Install SIGSEGV handler |
| 748 |
sigemptyset(&sigsegv_action.sa_mask); // Block interrupts during SEGV handling |
| 749 |
sigaddset(&sigsegv_action.sa_mask, SIGUSR2); |
| 750 |
sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler; |
| 751 |
sigsegv_action.sa_flags = SA_ONSTACK; |
| 752 |
sigsegv_action.sa_restorer = NULL; |
| 753 |
if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) { |
| 754 |
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno)); |
| 755 |
ErrorAlert(str); |
| 756 |
goto quit; |
| 757 |
} |
| 758 |
|
| 759 |
// Install SIGILL handler |
| 760 |
sigemptyset(&sigill_action.sa_mask); // Block interrupts during ILL handling |
| 761 |
sigaddset(&sigill_action.sa_mask, SIGUSR2); |
| 762 |
sigill_action.sa_handler = (__sighandler_t)sigill_handler; |
| 763 |
sigill_action.sa_flags = SA_ONSTACK; |
| 764 |
sigill_action.sa_restorer = NULL; |
| 765 |
if (sigaction(SIGILL, &sigill_action, NULL) < 0) { |
| 766 |
sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno)); |
| 767 |
ErrorAlert(str); |
| 768 |
goto quit; |
| 769 |
} |
| 770 |
|
| 771 |
// Install interrupt signal handler |
| 772 |
sigemptyset(&sigusr2_action.sa_mask); |
| 773 |
sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler; |
| 774 |
sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART; |
| 775 |
sigusr2_action.sa_restorer = NULL; |
| 776 |
if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) { |
| 777 |
sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno)); |
| 778 |
ErrorAlert(str); |
| 779 |
goto quit; |
| 780 |
} |
| 781 |
#endif |
| 782 |
|
| 783 |
// Get my thread ID and execute MacOS thread function |
| 784 |
emul_thread = pthread_self(); |
| 785 |
D(bug("MacOS thread is %ld\n", emul_thread)); |
| 786 |
emul_func(NULL); |
| 787 |
|
| 788 |
quit: |
| 789 |
Quit(); |
| 790 |
return 0; |
| 791 |
} |
| 792 |
|
| 793 |
|
| 794 |
/* |
| 795 |
* Cleanup and quit |
| 796 |
*/ |
| 797 |
|
| 798 |
static void Quit(void) |
| 799 |
{ |
| 800 |
// Stop 60Hz thread |
| 801 |
if (tick_thread_active) { |
| 802 |
pthread_cancel(tick_thread); |
| 803 |
pthread_join(tick_thread, NULL); |
| 804 |
} |
| 805 |
|
| 806 |
// Stop NVRAM watchdog thread |
| 807 |
if (nvram_thread_active) { |
| 808 |
pthread_cancel(nvram_thread); |
| 809 |
pthread_join(nvram_thread, NULL); |
| 810 |
} |
| 811 |
|
| 812 |
#if !EMULATED_PPC |
| 813 |
// Uninstall SIGSEGV handler |
| 814 |
sigemptyset(&sigsegv_action.sa_mask); |
| 815 |
sigsegv_action.sa_handler = SIG_DFL; |
| 816 |
sigsegv_action.sa_flags = 0; |
| 817 |
sigaction(SIGSEGV, &sigsegv_action, NULL); |
| 818 |
|
| 819 |
// Uninstall SIGILL handler |
| 820 |
sigemptyset(&sigill_action.sa_mask); |
| 821 |
sigill_action.sa_handler = SIG_DFL; |
| 822 |
sigill_action.sa_flags = 0; |
| 823 |
sigaction(SIGILL, &sigill_action, NULL); |
| 824 |
#endif |
| 825 |
|
| 826 |
// Save NVRAM |
| 827 |
XPRAMExit(); |
| 828 |
|
| 829 |
// Exit clipboard |
| 830 |
ClipExit(); |
| 831 |
|
| 832 |
// Exit Time Manager |
| 833 |
TimerExit(); |
| 834 |
|
| 835 |
// Exit serial |
| 836 |
SerialExit(); |
| 837 |
|
| 838 |
// Exit network |
| 839 |
EtherExit(); |
| 840 |
|
| 841 |
// Exit audio |
| 842 |
AudioExit(); |
| 843 |
|
| 844 |
// Exit video |
| 845 |
VideoExit(); |
| 846 |
|
| 847 |
// Exit external file system |
| 848 |
ExtFSExit(); |
| 849 |
|
| 850 |
// Exit drivers |
| 851 |
SCSIExit(); |
| 852 |
CDROMExit(); |
| 853 |
DiskExit(); |
| 854 |
SonyExit(); |
| 855 |
|
| 856 |
// Delete RAM area |
| 857 |
if (ram_area_mapped) |
| 858 |
munmap(mmap_RAMBase, RAMSize); |
| 859 |
|
| 860 |
// Delete ROM area |
| 861 |
if (rom_area_mapped) |
| 862 |
munmap((char *)ROM_BASE, ROM_AREA_SIZE); |
| 863 |
|
| 864 |
// Delete Kernel Data area |
| 865 |
if (kernel_area >= 0) { |
| 866 |
shmdt((void *)KERNEL_DATA_BASE); |
| 867 |
shmdt((void *)KERNEL_DATA2_BASE); |
| 868 |
shmctl(kernel_area, IPC_RMID, NULL); |
| 869 |
} |
| 870 |
|
| 871 |
// Delete Low Memory area |
| 872 |
if (lm_area_mapped) |
| 873 |
munmap((char *)0x0000, 0x3000); |
| 874 |
|
| 875 |
// Close /dev/zero |
| 876 |
if (zero_fd > 0) |
| 877 |
close(zero_fd); |
| 878 |
|
| 879 |
// Exit system routines |
| 880 |
SysExit(); |
| 881 |
|
| 882 |
// Exit preferences |
| 883 |
PrefsExit(); |
| 884 |
|
| 885 |
#ifdef ENABLE_MON |
| 886 |
// Exit mon |
| 887 |
mon_exit(); |
| 888 |
#endif |
| 889 |
|
| 890 |
// Close X11 server connection |
| 891 |
if (x_display) |
| 892 |
XCloseDisplay(x_display); |
| 893 |
|
| 894 |
exit(0); |
| 895 |
} |
| 896 |
|
| 897 |
|
| 898 |
/* |
| 899 |
* Jump into Mac ROM, start 680x0 emulator |
| 900 |
*/ |
| 901 |
|
| 902 |
#if EMULATED_PPC |
| 903 |
extern void emul_ppc(uint32 start); |
| 904 |
extern void init_emul_ppc(void); |
| 905 |
void jump_to_rom(uint32 entry) |
| 906 |
{ |
| 907 |
init_emul_ppc(); |
| 908 |
emul_ppc(entry); |
| 909 |
} |
| 910 |
#endif |
| 911 |
|
| 912 |
|
| 913 |
/* |
| 914 |
* Emulator thread function |
| 915 |
*/ |
| 916 |
|
| 917 |
static void *emul_func(void *arg) |
| 918 |
{ |
| 919 |
// We're now ready to receive signals |
| 920 |
ready_for_signals = true; |
| 921 |
|
| 922 |
// Decrease priority, so more time-critical things like audio will work better |
| 923 |
nice(1); |
| 924 |
|
| 925 |
// Jump to ROM boot routine |
| 926 |
D(bug("Jumping to ROM\n")); |
| 927 |
#if EMULATED_PPC |
| 928 |
jump_to_rom(ROM_BASE + 0x310000); |
| 929 |
#else |
| 930 |
jump_to_rom(ROM_BASE + 0x310000, (uint32)emulator_data); |
| 931 |
#endif |
| 932 |
D(bug("Returned from ROM\n")); |
| 933 |
|
| 934 |
// We're no longer ready to receive signals |
| 935 |
ready_for_signals = false; |
| 936 |
return NULL; |
| 937 |
} |
| 938 |
|
| 939 |
|
| 940 |
#if !EMULATED_PPC |
| 941 |
/* |
| 942 |
* Execute 68k subroutine (must be ended with RTS) |
| 943 |
* This must only be called by the emul_thread when in EMUL_OP mode |
| 944 |
* r->a[7] is unused, the routine runs on the caller's stack |
| 945 |
*/ |
| 946 |
|
| 947 |
void Execute68k(uint32 pc, M68kRegisters *r) |
| 948 |
{ |
| 949 |
#if SAFE_EXEC_68K |
| 950 |
if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP) |
| 951 |
printf("FATAL: Execute68k() not called from EMUL_OP mode\n"); |
| 952 |
if (!pthread_equal(pthread_self(), emul_thread)) |
| 953 |
printf("FATAL: Execute68k() not called from emul_thread\n"); |
| 954 |
#endif |
| 955 |
execute_68k(pc, r); |
| 956 |
} |
| 957 |
|
| 958 |
|
| 959 |
/* |
| 960 |
* Execute 68k A-Trap from EMUL_OP routine |
| 961 |
* r->a[7] is unused, the routine runs on the caller's stack |
| 962 |
*/ |
| 963 |
|
| 964 |
void Execute68kTrap(uint16 trap, M68kRegisters *r) |
| 965 |
{ |
| 966 |
uint16 proc[2] = {trap, M68K_RTS}; |
| 967 |
Execute68k((uint32)proc, r); |
| 968 |
} |
| 969 |
#endif |
| 970 |
|
| 971 |
|
| 972 |
/* |
| 973 |
* Execute PPC code from EMUL_OP routine (real mode switch) |
| 974 |
*/ |
| 975 |
|
| 976 |
void ExecutePPC(void (*func)()) |
| 977 |
{ |
| 978 |
uint32 tvect[2] = {(uint32)func, 0}; // Fake TVECT |
| 979 |
RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect); |
| 980 |
M68kRegisters r; |
| 981 |
Execute68k((uint32)&desc, &r); |
| 982 |
} |
| 983 |
|
| 984 |
|
| 985 |
/* |
| 986 |
* Quit emulator (cause return from jump_to_rom) |
| 987 |
*/ |
| 988 |
|
| 989 |
void QuitEmulator(void) |
| 990 |
{ |
| 991 |
#if EMULATED_PPC |
| 992 |
Quit(); |
| 993 |
#else |
| 994 |
quit_emulator(); |
| 995 |
#endif |
| 996 |
} |
| 997 |
|
| 998 |
|
| 999 |
/* |
| 1000 |
* Pause/resume emulator |
| 1001 |
*/ |
| 1002 |
|
| 1003 |
void PauseEmulator(void) |
| 1004 |
{ |
| 1005 |
pthread_kill(emul_thread, SIGSTOP); |
| 1006 |
} |
| 1007 |
|
| 1008 |
void ResumeEmulator(void) |
| 1009 |
{ |
| 1010 |
pthread_kill(emul_thread, SIGCONT); |
| 1011 |
} |
| 1012 |
|
| 1013 |
|
| 1014 |
/* |
| 1015 |
* Dump 68k registers |
| 1016 |
*/ |
| 1017 |
|
| 1018 |
void Dump68kRegs(M68kRegisters *r) |
| 1019 |
{ |
| 1020 |
// Display 68k registers |
| 1021 |
for (int i=0; i<8; i++) { |
| 1022 |
printf("d%d: %08x", i, r->d[i]); |
| 1023 |
if (i == 3 || i == 7) |
| 1024 |
printf("\n"); |
| 1025 |
else |
| 1026 |
printf(", "); |
| 1027 |
} |
| 1028 |
for (int i=0; i<8; i++) { |
| 1029 |
printf("a%d: %08x", i, r->a[i]); |
| 1030 |
if (i == 3 || i == 7) |
| 1031 |
printf("\n"); |
| 1032 |
else |
| 1033 |
printf(", "); |
| 1034 |
} |
| 1035 |
} |
| 1036 |
|
| 1037 |
|
| 1038 |
/* |
| 1039 |
* Make code executable |
| 1040 |
*/ |
| 1041 |
|
| 1042 |
void MakeExecutable(int dummy, void *start, uint32 length) |
| 1043 |
{ |
| 1044 |
#if !EMULATED_PPC |
| 1045 |
if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE))) |
| 1046 |
return; |
| 1047 |
flush_icache_range(start, (void *)((uint32)start + length)); |
| 1048 |
#endif |
| 1049 |
} |
| 1050 |
|
| 1051 |
|
| 1052 |
/* |
| 1053 |
* Patch things after system startup (gets called by disk driver accRun routine) |
| 1054 |
*/ |
| 1055 |
|
| 1056 |
void PatchAfterStartup(void) |
| 1057 |
{ |
| 1058 |
ExecutePPC(VideoInstallAccel); |
| 1059 |
InstallExtFS(); |
| 1060 |
} |
| 1061 |
|
| 1062 |
|
| 1063 |
/* |
| 1064 |
* NVRAM watchdog thread (saves NVRAM every minute) |
| 1065 |
*/ |
| 1066 |
|
| 1067 |
static void *nvram_func(void *arg) |
| 1068 |
{ |
| 1069 |
struct timespec req = {60, 0}; // 1 minute |
| 1070 |
|
| 1071 |
for (;;) { |
| 1072 |
pthread_testcancel(); |
| 1073 |
nanosleep(&req, NULL); |
| 1074 |
pthread_testcancel(); |
| 1075 |
if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) { |
| 1076 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
| 1077 |
SaveXPRAM(); |
| 1078 |
} |
| 1079 |
} |
| 1080 |
return NULL; |
| 1081 |
} |
| 1082 |
|
| 1083 |
|
| 1084 |
/* |
| 1085 |
* 60Hz thread (really 60.15Hz) |
| 1086 |
*/ |
| 1087 |
|
| 1088 |
static void *tick_func(void *arg) |
| 1089 |
{ |
| 1090 |
int tick_counter = 0; |
| 1091 |
struct timespec req = {0, 16625000}; |
| 1092 |
|
| 1093 |
for (;;) { |
| 1094 |
|
| 1095 |
// Wait |
| 1096 |
nanosleep(&req, NULL); |
| 1097 |
|
| 1098 |
#if !EMULATED_PPC |
| 1099 |
// Did we crash? |
| 1100 |
if (emul_thread_fatal) { |
| 1101 |
|
| 1102 |
// Yes, dump registers |
| 1103 |
pt_regs *r = (pt_regs *)&sigsegv_regs; |
| 1104 |
char str[256]; |
| 1105 |
sprintf(str, "SIGSEGV\n" |
| 1106 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 1107 |
" xer %08lx cr %08lx \n" |
| 1108 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 1109 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 1110 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 1111 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 1112 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 1113 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 1114 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 1115 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 1116 |
r->nip, r->link, r->ctr, r->msr, |
| 1117 |
r->xer, r->ccr, |
| 1118 |
r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3], |
| 1119 |
r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7], |
| 1120 |
r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11], |
| 1121 |
r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15], |
| 1122 |
r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19], |
| 1123 |
r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23], |
| 1124 |
r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27], |
| 1125 |
r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]); |
| 1126 |
printf(str); |
| 1127 |
VideoQuitFullScreen(); |
| 1128 |
|
| 1129 |
#ifdef ENABLE_MON |
| 1130 |
// Start up mon in real-mode |
| 1131 |
printf("Welcome to the sheep factory.\n"); |
| 1132 |
char *arg[4] = {"mon", "-m", "-r", NULL}; |
| 1133 |
mon(3, arg); |
| 1134 |
#endif |
| 1135 |
return NULL; |
| 1136 |
} |
| 1137 |
#endif |
| 1138 |
|
| 1139 |
// Pseudo Mac 1Hz interrupt, update local time |
| 1140 |
if (++tick_counter > 60) { |
| 1141 |
tick_counter = 0; |
| 1142 |
WriteMacInt32(0x20c, TimerDateTime()); |
| 1143 |
} |
| 1144 |
|
| 1145 |
// Trigger 60Hz interrupt |
| 1146 |
if (ReadMacInt32(XLM_IRQ_NEST) == 0) { |
| 1147 |
SetInterruptFlag(INTFLAG_VIA); |
| 1148 |
TriggerInterrupt(); |
| 1149 |
} |
| 1150 |
} |
| 1151 |
return NULL; |
| 1152 |
} |
| 1153 |
|
| 1154 |
|
| 1155 |
/* |
| 1156 |
* Mutexes |
| 1157 |
*/ |
| 1158 |
|
| 1159 |
struct B2_mutex { |
| 1160 |
int dummy; |
| 1161 |
}; |
| 1162 |
|
| 1163 |
B2_mutex *B2_create_mutex(void) |
| 1164 |
{ |
| 1165 |
return new B2_mutex; |
| 1166 |
} |
| 1167 |
|
| 1168 |
void B2_lock_mutex(B2_mutex *mutex) |
| 1169 |
{ |
| 1170 |
} |
| 1171 |
|
| 1172 |
void B2_unlock_mutex(B2_mutex *mutex) |
| 1173 |
{ |
| 1174 |
} |
| 1175 |
|
| 1176 |
void B2_delete_mutex(B2_mutex *mutex) |
| 1177 |
{ |
| 1178 |
delete mutex; |
| 1179 |
} |
| 1180 |
|
| 1181 |
|
| 1182 |
/* |
| 1183 |
* Trigger signal USR2 from another thread |
| 1184 |
*/ |
| 1185 |
|
| 1186 |
void TriggerInterrupt(void) |
| 1187 |
{ |
| 1188 |
#if EMULATED_PPC |
| 1189 |
WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1); |
| 1190 |
#else |
| 1191 |
#if 0 |
| 1192 |
WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1); |
| 1193 |
#else |
| 1194 |
if (ready_for_signals) |
| 1195 |
pthread_kill(emul_thread, SIGUSR2); |
| 1196 |
#endif |
| 1197 |
#endif |
| 1198 |
} |
| 1199 |
|
| 1200 |
|
| 1201 |
/* |
| 1202 |
* Interrupt flags (must be handled atomically!) |
| 1203 |
*/ |
| 1204 |
|
| 1205 |
volatile uint32 InterruptFlags = 0; |
| 1206 |
|
| 1207 |
void SetInterruptFlag(uint32 flag) |
| 1208 |
{ |
| 1209 |
atomic_or((int *)&InterruptFlags, flag); |
| 1210 |
} |
| 1211 |
|
| 1212 |
void ClearInterruptFlag(uint32 flag) |
| 1213 |
{ |
| 1214 |
atomic_and((int *)&InterruptFlags, ~flag); |
| 1215 |
} |
| 1216 |
|
| 1217 |
|
| 1218 |
/* |
| 1219 |
* Disable interrupts |
| 1220 |
*/ |
| 1221 |
|
| 1222 |
void DisableInterrupt(void) |
| 1223 |
{ |
| 1224 |
atomic_add((int *)XLM_IRQ_NEST, 1); |
| 1225 |
} |
| 1226 |
|
| 1227 |
|
| 1228 |
/* |
| 1229 |
* Enable interrupts |
| 1230 |
*/ |
| 1231 |
|
| 1232 |
void EnableInterrupt(void) |
| 1233 |
{ |
| 1234 |
atomic_add((int *)XLM_IRQ_NEST, -1); |
| 1235 |
} |
| 1236 |
|
| 1237 |
|
| 1238 |
#if !EMULATED_PPC |
| 1239 |
/* |
| 1240 |
* USR2 handler |
| 1241 |
*/ |
| 1242 |
|
| 1243 |
static void sigusr2_handler(int sig, sigcontext_struct *sc) |
| 1244 |
{ |
| 1245 |
pt_regs *r = sc->regs; |
| 1246 |
|
| 1247 |
// Do nothing if interrupts are disabled |
| 1248 |
if (*(int32 *)XLM_IRQ_NEST > 0) |
| 1249 |
return; |
| 1250 |
|
| 1251 |
// Disable MacOS stack sniffer |
| 1252 |
WriteMacInt32(0x110, 0); |
| 1253 |
|
| 1254 |
// Interrupt action depends on current run mode |
| 1255 |
switch (ReadMacInt32(XLM_RUN_MODE)) { |
| 1256 |
case MODE_68K: |
| 1257 |
// 68k emulator active, trigger 68k interrupt level 1 |
| 1258 |
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1); |
| 1259 |
r->ccr |= ntohl(kernel_data->v[0x674 >> 2]); |
| 1260 |
break; |
| 1261 |
|
| 1262 |
#if INTERRUPTS_IN_NATIVE_MODE |
| 1263 |
case MODE_NATIVE: |
| 1264 |
// 68k emulator inactive, in nanokernel? |
| 1265 |
if (r->gpr[1] != KernelDataAddr) { |
| 1266 |
// Prepare for 68k interrupt level 1 |
| 1267 |
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1); |
| 1268 |
WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2])); |
| 1269 |
|
| 1270 |
// Execute nanokernel interrupt routine (this will activate the 68k emulator) |
| 1271 |
atomic_add((int32 *)XLM_IRQ_NEST, 1); |
| 1272 |
if (ROMType == ROMTYPE_NEWWORLD) |
| 1273 |
ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr); |
| 1274 |
else |
| 1275 |
ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr); |
| 1276 |
} |
| 1277 |
break; |
| 1278 |
#endif |
| 1279 |
|
| 1280 |
#if INTERRUPTS_IN_EMUL_OP_MODE |
| 1281 |
case MODE_EMUL_OP: |
| 1282 |
// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0 |
| 1283 |
if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) { |
| 1284 |
|
| 1285 |
// Set extra stack for SIGSEGV handler |
| 1286 |
struct sigaltstack new_stack; |
| 1287 |
new_stack.ss_sp = extra_stack; |
| 1288 |
new_stack.ss_flags = 0; |
| 1289 |
new_stack.ss_size = SIG_STACK_SIZE; |
| 1290 |
sigaltstack(&new_stack, NULL); |
| 1291 |
#if 1 |
| 1292 |
// Execute full 68k interrupt routine |
| 1293 |
M68kRegisters r; |
| 1294 |
uint32 old_r25 = ReadMacInt32(XLM_68K_R25); // Save interrupt level |
| 1295 |
WriteMacInt32(XLM_68K_R25, 0x21); // Execute with interrupt level 1 |
| 1296 |
static const uint16 proc[] = { |
| 1297 |
0x3f3c, 0x0000, // move.w #$0000,-(sp) (fake format word) |
| 1298 |
0x487a, 0x000a, // pea @1(pc) (return address) |
| 1299 |
0x40e7, // move sr,-(sp) (saved SR) |
| 1300 |
0x2078, 0x0064, // move.l $64,a0 |
| 1301 |
0x4ed0, // jmp (a0) |
| 1302 |
M68K_RTS // @1 |
| 1303 |
}; |
| 1304 |
Execute68k((uint32)proc, &r); |
| 1305 |
WriteMacInt32(XLM_68K_R25, old_r25); // Restore interrupt level |
| 1306 |
#else |
| 1307 |
// Only update cursor |
| 1308 |
if (HasMacStarted()) { |
| 1309 |
if (InterruptFlags & INTFLAG_VIA) { |
| 1310 |
ClearInterruptFlag(INTFLAG_VIA); |
| 1311 |
ADBInterrupt(); |
| 1312 |
ExecutePPC(VideoVBL); |
| 1313 |
} |
| 1314 |
} |
| 1315 |
#endif |
| 1316 |
// Reset normal signal stack |
| 1317 |
new_stack.ss_sp = sig_stack; |
| 1318 |
new_stack.ss_flags = 0; |
| 1319 |
new_stack.ss_size = SIG_STACK_SIZE; |
| 1320 |
sigaltstack(&new_stack, NULL); |
| 1321 |
} |
| 1322 |
break; |
| 1323 |
#endif |
| 1324 |
|
| 1325 |
} |
| 1326 |
} |
| 1327 |
|
| 1328 |
|
| 1329 |
/* |
| 1330 |
* SIGSEGV handler |
| 1331 |
*/ |
| 1332 |
|
| 1333 |
static void sigsegv_handler(int sig, sigcontext_struct *sc) |
| 1334 |
{ |
| 1335 |
pt_regs *r = sc->regs; |
| 1336 |
num_segv++; |
| 1337 |
|
| 1338 |
// Fault in Mac ROM or RAM? |
| 1339 |
bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize)); |
| 1340 |
if (mac_fault) { |
| 1341 |
|
| 1342 |
// Get opcode and divide into fields |
| 1343 |
uint32 opcode = *((uint32 *)r->nip); |
| 1344 |
uint32 primop = opcode >> 26; |
| 1345 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 1346 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 1347 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 1348 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 1349 |
int32 imm = (int16)(opcode & 0xffff); |
| 1350 |
|
| 1351 |
// "VM settings" during MacOS 8 installation |
| 1352 |
if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) { |
| 1353 |
r->nip += 4; |
| 1354 |
r->gpr[8] = 0; |
| 1355 |
return; |
| 1356 |
|
| 1357 |
// MacOS 8.5 installation |
| 1358 |
} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) { |
| 1359 |
r->nip += 4; |
| 1360 |
r->gpr[8] = 0; |
| 1361 |
return; |
| 1362 |
|
| 1363 |
// MacOS 8 serial drivers on startup |
| 1364 |
} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) { |
| 1365 |
r->nip += 4; |
| 1366 |
r->gpr[8] = 0; |
| 1367 |
return; |
| 1368 |
|
| 1369 |
// MacOS 8.1 serial drivers on startup |
| 1370 |
} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) { |
| 1371 |
r->nip += 4; |
| 1372 |
return; |
| 1373 |
} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) { |
| 1374 |
r->nip += 4; |
| 1375 |
return; |
| 1376 |
} |
| 1377 |
|
| 1378 |
// Analyze opcode |
| 1379 |
enum { |
| 1380 |
TYPE_UNKNOWN, |
| 1381 |
TYPE_LOAD, |
| 1382 |
TYPE_STORE |
| 1383 |
} transfer_type = TYPE_UNKNOWN; |
| 1384 |
enum { |
| 1385 |
SIZE_UNKNOWN, |
| 1386 |
SIZE_BYTE, |
| 1387 |
SIZE_HALFWORD, |
| 1388 |
SIZE_WORD |
| 1389 |
} transfer_size = SIZE_UNKNOWN; |
| 1390 |
enum { |
| 1391 |
MODE_UNKNOWN, |
| 1392 |
MODE_NORM, |
| 1393 |
MODE_U, |
| 1394 |
MODE_X, |
| 1395 |
MODE_UX |
| 1396 |
} addr_mode = MODE_UNKNOWN; |
| 1397 |
switch (primop) { |
| 1398 |
case 31: |
| 1399 |
switch (exop) { |
| 1400 |
case 23: // lwzx |
| 1401 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 1402 |
case 55: // lwzux |
| 1403 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 1404 |
case 87: // lbzx |
| 1405 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 1406 |
case 119: // lbzux |
| 1407 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 1408 |
case 151: // stwx |
| 1409 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
| 1410 |
case 183: // stwux |
| 1411 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
| 1412 |
case 215: // stbx |
| 1413 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
| 1414 |
case 247: // stbux |
| 1415 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
| 1416 |
case 279: // lhzx |
| 1417 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1418 |
case 311: // lhzux |
| 1419 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1420 |
case 343: // lhax |
| 1421 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1422 |
case 375: // lhaux |
| 1423 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1424 |
case 407: // sthx |
| 1425 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
| 1426 |
case 439: // sthux |
| 1427 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
| 1428 |
} |
| 1429 |
break; |
| 1430 |
|
| 1431 |
case 32: // lwz |
| 1432 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 1433 |
case 33: // lwzu |
| 1434 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 1435 |
case 34: // lbz |
| 1436 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 1437 |
case 35: // lbzu |
| 1438 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 1439 |
case 36: // stw |
| 1440 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
| 1441 |
case 37: // stwu |
| 1442 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
| 1443 |
case 38: // stb |
| 1444 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
| 1445 |
case 39: // stbu |
| 1446 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
| 1447 |
case 40: // lhz |
| 1448 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1449 |
case 41: // lhzu |
| 1450 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1451 |
case 42: // lha |
| 1452 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1453 |
case 43: // lhau |
| 1454 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1455 |
case 44: // sth |
| 1456 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
| 1457 |
case 45: // sthu |
| 1458 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
| 1459 |
} |
| 1460 |
|
| 1461 |
// Calculate effective address |
| 1462 |
uint32 addr = 0; |
| 1463 |
switch (addr_mode) { |
| 1464 |
case MODE_X: |
| 1465 |
case MODE_UX: |
| 1466 |
if (ra == 0) |
| 1467 |
addr = r->gpr[rb]; |
| 1468 |
else |
| 1469 |
addr = r->gpr[ra] + r->gpr[rb]; |
| 1470 |
break; |
| 1471 |
case MODE_NORM: |
| 1472 |
case MODE_U: |
| 1473 |
if (ra == 0) |
| 1474 |
addr = (int32)(int16)imm; |
| 1475 |
else |
| 1476 |
addr = r->gpr[ra] + (int32)(int16)imm; |
| 1477 |
break; |
| 1478 |
default: |
| 1479 |
break; |
| 1480 |
} |
| 1481 |
|
| 1482 |
// Ignore ROM writes |
| 1483 |
if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) { |
| 1484 |
// D(bug("WARNING: %s write access to ROM at %08lx, pc %08lx\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->nip)); |
| 1485 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 1486 |
r->gpr[ra] = addr; |
| 1487 |
r->nip += 4; |
| 1488 |
goto rti; |
| 1489 |
} |
| 1490 |
|
| 1491 |
// Ignore illegal memory accesses? |
| 1492 |
if (PrefsFindBool("ignoresegv")) { |
| 1493 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
| 1494 |
r->gpr[ra] = addr; |
| 1495 |
if (transfer_type == TYPE_LOAD) |
| 1496 |
r->gpr[rd] = 0; |
| 1497 |
r->nip += 4; |
| 1498 |
goto rti; |
| 1499 |
} |
| 1500 |
|
| 1501 |
// In GUI mode, show error alert |
| 1502 |
if (!PrefsFindBool("nogui")) { |
| 1503 |
char str[256]; |
| 1504 |
if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE) |
| 1505 |
sprintf(str, GetString(STR_MEM_ACCESS_ERR), transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_HALFWORD ? "halfword" : "word", transfer_type == TYPE_LOAD ? GetString(STR_MEM_ACCESS_READ) : GetString(STR_MEM_ACCESS_WRITE), addr, r->nip, r->gpr[24], r->gpr[1]); |
| 1506 |
else |
| 1507 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode); |
| 1508 |
ErrorAlert(str); |
| 1509 |
QuitEmulator(); |
| 1510 |
return; |
| 1511 |
} |
| 1512 |
} |
| 1513 |
|
| 1514 |
// For all other errors, jump into debugger (sort of...) |
| 1515 |
if (!ready_for_signals) { |
| 1516 |
printf("SIGSEGV\n"); |
| 1517 |
printf(" sigcontext %p, pt_regs %p\n", sc, r); |
| 1518 |
printf( |
| 1519 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 1520 |
" xer %08lx cr %08lx \n" |
| 1521 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 1522 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 1523 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 1524 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 1525 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 1526 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 1527 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 1528 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 1529 |
r->nip, r->link, r->ctr, r->msr, |
| 1530 |
r->xer, r->ccr, |
| 1531 |
r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3], |
| 1532 |
r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7], |
| 1533 |
r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11], |
| 1534 |
r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15], |
| 1535 |
r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19], |
| 1536 |
r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23], |
| 1537 |
r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27], |
| 1538 |
r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]); |
| 1539 |
exit(1); |
| 1540 |
QuitEmulator(); |
| 1541 |
return; |
| 1542 |
} else { |
| 1543 |
// We crashed. Save registers, tell tick thread and loop forever |
| 1544 |
sigsegv_regs = *(sigregs *)r; |
| 1545 |
emul_thread_fatal = true; |
| 1546 |
for (;;) ; |
| 1547 |
} |
| 1548 |
rti:; |
| 1549 |
} |
| 1550 |
|
| 1551 |
|
| 1552 |
/* |
| 1553 |
* SIGILL handler |
| 1554 |
*/ |
| 1555 |
|
| 1556 |
static void sigill_handler(int sig, sigcontext_struct *sc) |
| 1557 |
{ |
| 1558 |
pt_regs *r = sc->regs; |
| 1559 |
char str[256]; |
| 1560 |
|
| 1561 |
// Fault in Mac ROM or RAM? |
| 1562 |
bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize)); |
| 1563 |
if (mac_fault) { |
| 1564 |
|
| 1565 |
// Get opcode and divide into fields |
| 1566 |
uint32 opcode = *((uint32 *)r->nip); |
| 1567 |
uint32 primop = opcode >> 26; |
| 1568 |
uint32 exop = (opcode >> 1) & 0x3ff; |
| 1569 |
uint32 ra = (opcode >> 16) & 0x1f; |
| 1570 |
uint32 rb = (opcode >> 11) & 0x1f; |
| 1571 |
uint32 rd = (opcode >> 21) & 0x1f; |
| 1572 |
int32 imm = (int16)(opcode & 0xffff); |
| 1573 |
|
| 1574 |
switch (primop) { |
| 1575 |
case 9: // POWER instructions |
| 1576 |
case 22: |
| 1577 |
power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode); |
| 1578 |
ErrorAlert(str); |
| 1579 |
QuitEmulator(); |
| 1580 |
return; |
| 1581 |
|
| 1582 |
case 31: |
| 1583 |
switch (exop) { |
| 1584 |
case 83: // mfmsr |
| 1585 |
r->gpr[rd] = 0xf072; |
| 1586 |
r->nip += 4; |
| 1587 |
goto rti; |
| 1588 |
|
| 1589 |
case 210: // mtsr |
| 1590 |
case 242: // mtsrin |
| 1591 |
case 306: // tlbie |
| 1592 |
r->nip += 4; |
| 1593 |
goto rti; |
| 1594 |
|
| 1595 |
case 339: { // mfspr |
| 1596 |
int spr = ra | (rb << 5); |
| 1597 |
switch (spr) { |
| 1598 |
case 0: // MQ |
| 1599 |
case 22: // DEC |
| 1600 |
case 952: // MMCR0 |
| 1601 |
case 953: // PMC1 |
| 1602 |
case 954: // PMC2 |
| 1603 |
case 955: // SIA |
| 1604 |
case 956: // MMCR1 |
| 1605 |
case 957: // PMC3 |
| 1606 |
case 958: // PMC4 |
| 1607 |
case 959: // SDA |
| 1608 |
r->nip += 4; |
| 1609 |
goto rti; |
| 1610 |
case 25: // SDR1 |
| 1611 |
r->gpr[rd] = 0xdead001f; |
| 1612 |
r->nip += 4; |
| 1613 |
goto rti; |
| 1614 |
case 287: // PVR |
| 1615 |
r->gpr[rd] = PVR; |
| 1616 |
r->nip += 4; |
| 1617 |
goto rti; |
| 1618 |
} |
| 1619 |
break; |
| 1620 |
} |
| 1621 |
|
| 1622 |
case 467: { // mtspr |
| 1623 |
int spr = ra | (rb << 5); |
| 1624 |
switch (spr) { |
| 1625 |
case 0: // MQ |
| 1626 |
case 22: // DEC |
| 1627 |
case 275: // SPRG3 |
| 1628 |
case 528: // IBAT0U |
| 1629 |
case 529: // IBAT0L |
| 1630 |
case 530: // IBAT1U |
| 1631 |
case 531: // IBAT1L |
| 1632 |
case 532: // IBAT2U |
| 1633 |
case 533: // IBAT2L |
| 1634 |
case 534: // IBAT3U |
| 1635 |
case 535: // IBAT3L |
| 1636 |
case 536: // DBAT0U |
| 1637 |
case 537: // DBAT0L |
| 1638 |
case 538: // DBAT1U |
| 1639 |
case 539: // DBAT1L |
| 1640 |
case 540: // DBAT2U |
| 1641 |
case 541: // DBAT2L |
| 1642 |
case 542: // DBAT3U |
| 1643 |
case 543: // DBAT3L |
| 1644 |
case 952: // MMCR0 |
| 1645 |
case 953: // PMC1 |
| 1646 |
case 954: // PMC2 |
| 1647 |
case 955: // SIA |
| 1648 |
case 956: // MMCR1 |
| 1649 |
case 957: // PMC3 |
| 1650 |
case 958: // PMC4 |
| 1651 |
case 959: // SDA |
| 1652 |
r->nip += 4; |
| 1653 |
goto rti; |
| 1654 |
} |
| 1655 |
break; |
| 1656 |
} |
| 1657 |
|
| 1658 |
case 29: case 107: case 152: case 153: // POWER instructions |
| 1659 |
case 184: case 216: case 217: case 248: |
| 1660 |
case 264: case 277: case 331: case 360: |
| 1661 |
case 363: case 488: case 531: case 537: |
| 1662 |
case 541: case 664: case 665: case 696: |
| 1663 |
case 728: case 729: case 760: case 920: |
| 1664 |
case 921: case 952: |
| 1665 |
goto power_inst; |
| 1666 |
} |
| 1667 |
} |
| 1668 |
|
| 1669 |
// In GUI mode, show error alert |
| 1670 |
if (!PrefsFindBool("nogui")) { |
| 1671 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode); |
| 1672 |
ErrorAlert(str); |
| 1673 |
QuitEmulator(); |
| 1674 |
return; |
| 1675 |
} |
| 1676 |
} |
| 1677 |
|
| 1678 |
// For all other errors, jump into debugger (sort of...) |
| 1679 |
if (!ready_for_signals) { |
| 1680 |
printf("SIGILL\n"); |
| 1681 |
printf(" sigcontext %p, pt_regs %p\n", sc, r); |
| 1682 |
printf( |
| 1683 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
| 1684 |
" xer %08lx cr %08lx \n" |
| 1685 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
| 1686 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
| 1687 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
| 1688 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
| 1689 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
| 1690 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
| 1691 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
| 1692 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
| 1693 |
r->nip, r->link, r->ctr, r->msr, |
| 1694 |
r->xer, r->ccr, |
| 1695 |
r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3], |
| 1696 |
r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7], |
| 1697 |
r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11], |
| 1698 |
r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15], |
| 1699 |
r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19], |
| 1700 |
r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23], |
| 1701 |
r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27], |
| 1702 |
r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]); |
| 1703 |
exit(1); |
| 1704 |
QuitEmulator(); |
| 1705 |
return; |
| 1706 |
} else { |
| 1707 |
// We crashed. Save registers, tell tick thread and loop forever |
| 1708 |
sigsegv_regs = *(sigregs *)r; |
| 1709 |
emul_thread_fatal = true; |
| 1710 |
for (;;) ; |
| 1711 |
} |
| 1712 |
rti:; |
| 1713 |
} |
| 1714 |
#endif |
| 1715 |
|
| 1716 |
|
| 1717 |
/* |
| 1718 |
* Display alert |
| 1719 |
*/ |
| 1720 |
|
| 1721 |
#ifdef ENABLE_GTK |
| 1722 |
static void dl_destroyed(void) |
| 1723 |
{ |
| 1724 |
gtk_main_quit(); |
| 1725 |
} |
| 1726 |
|
| 1727 |
static void dl_quit(GtkWidget *dialog) |
| 1728 |
{ |
| 1729 |
gtk_widget_destroy(dialog); |
| 1730 |
} |
| 1731 |
|
| 1732 |
void display_alert(int title_id, int prefix_id, int button_id, const char *text) |
| 1733 |
{ |
| 1734 |
char str[256]; |
| 1735 |
sprintf(str, GetString(prefix_id), text); |
| 1736 |
|
| 1737 |
GtkWidget *dialog = gtk_dialog_new(); |
| 1738 |
gtk_window_set_title(GTK_WINDOW(dialog), GetString(title_id)); |
| 1739 |
gtk_container_border_width(GTK_CONTAINER(dialog), 5); |
| 1740 |
gtk_widget_set_uposition(GTK_WIDGET(dialog), 100, 150); |
| 1741 |
gtk_signal_connect(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(dl_destroyed), NULL); |
| 1742 |
|
| 1743 |
GtkWidget *label = gtk_label_new(str); |
| 1744 |
gtk_widget_show(label); |
| 1745 |
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), label, TRUE, TRUE, 0); |
| 1746 |
|
| 1747 |
GtkWidget *button = gtk_button_new_with_label(GetString(button_id)); |
| 1748 |
gtk_widget_show(button); |
| 1749 |
gtk_signal_connect_object(GTK_OBJECT(button), "clicked", GTK_SIGNAL_FUNC(dl_quit), GTK_OBJECT(dialog)); |
| 1750 |
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, FALSE, FALSE, 0); |
| 1751 |
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT); |
| 1752 |
gtk_widget_grab_default(button); |
| 1753 |
gtk_widget_show(dialog); |
| 1754 |
|
| 1755 |
gtk_main(); |
| 1756 |
} |
| 1757 |
#endif |
| 1758 |
|
| 1759 |
|
| 1760 |
/* |
| 1761 |
* Display error alert |
| 1762 |
*/ |
| 1763 |
|
| 1764 |
void ErrorAlert(const char *text) |
| 1765 |
{ |
| 1766 |
#ifdef ENABLE_GTK |
| 1767 |
if (PrefsFindBool("nogui") || x_display == NULL) { |
| 1768 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 1769 |
return; |
| 1770 |
} |
| 1771 |
VideoQuitFullScreen(); |
| 1772 |
display_alert(STR_ERROR_ALERT_TITLE, STR_GUI_ERROR_PREFIX, STR_QUIT_BUTTON, text); |
| 1773 |
#else |
| 1774 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
| 1775 |
#endif |
| 1776 |
} |
| 1777 |
|
| 1778 |
|
| 1779 |
/* |
| 1780 |
* Display warning alert |
| 1781 |
*/ |
| 1782 |
|
| 1783 |
void WarningAlert(const char *text) |
| 1784 |
{ |
| 1785 |
#ifdef ENABLE_GTK |
| 1786 |
if (PrefsFindBool("nogui") || x_display == NULL) { |
| 1787 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 1788 |
return; |
| 1789 |
} |
| 1790 |
display_alert(STR_WARNING_ALERT_TITLE, STR_GUI_WARNING_PREFIX, STR_OK_BUTTON, text); |
| 1791 |
#else |
| 1792 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 1793 |
#endif |
| 1794 |
} |
| 1795 |
|
| 1796 |
|
| 1797 |
/* |
| 1798 |
* Display choice alert |
| 1799 |
*/ |
| 1800 |
|
| 1801 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
| 1802 |
{ |
| 1803 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
| 1804 |
return false; //!! |
| 1805 |
} |
