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root/cebix/SheepShaver/src/Unix/main_unix.cpp
Revision: 1.98
Committed: 2011-12-30T17:38:39Z (12 years, 5 months ago) by asvitkine
Branch: MAIN
Changes since 1.97: +1 -0 lines
Log Message: 
fix ppc build breakage

File Contents

# Content
1 /*
2 * main_unix.cpp - Emulation core, Unix implementation
3 *
4 * SheepShaver (C) 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 a pointer to Thread Local Storage (TLS) under Linux with
31 * recent enough glibc. This is r2 in 32-bit mode and r13 in
32 * 64-bit mode (PowerOpen/AIX ABI)
33 * - r13 is used as a small data pointer under Linux (but appearently
34 * it is not used this way? To be sure, we specify -msdata=none
35 * in the Makefile)
36 * - There are no TVECTs under Linux; function pointers point
37 * directly to the function code
38 * The Execute*() functions have to account for this. Additionally, we
39 * cannot simply call MacOS functions by getting their TVECT and jumping
40 * to it. Such calls are done via the call_macos*() functions in
41 * asm_linux.S that create a MacOS stack frame, load the TOC pointer
42 * and put the arguments into the right registers.
43 *
44 * As on the BeOS, we have to specify an alternate signal stack because
45 * interrupts (and, under Linux, Low Memory accesses) may occur when r1
46 * is pointing to the Kernel Data or to Low Memory. There is one
47 * problem, however, due to the alternate signal stack being global to
48 * all signal handlers. Consider the following scenario:
49 * - The main thread is executing some native PPC MacOS code in
50 * MODE_NATIVE, running on the MacOS stack (somewhere in the Mac RAM).
51 * - A SIGUSR2 interrupt occurs. The kernel switches to the signal
52 * stack and starts executing the SIGUSR2 signal handler.
53 * - The signal handler sees the MODE_NATIVE and calls ppc_interrupt()
54 * to handle a native interrupt.
55 * - ppc_interrupt() sets r1 to point to the Kernel Data and jumps to
56 * the nanokernel.
57 * - The nanokernel accesses a Low Memory global (most likely one of
58 * the XLMs), a SIGSEGV occurs.
59 * - The kernel sees that r1 does not point to the signal stack and
60 * switches to the signal stack again, thus overwriting the data that
61 * the SIGUSR2 handler put there.
62 * The same problem arises when calling ExecutePPC() inside the MODE_EMUL_OP
63 * interrupt handler.
64 *
65 * The solution is to set the signal stack to a second, "extra" stack
66 * inside the SIGUSR2 handler before entering the Nanokernel or calling
67 * ExecutePPC (or any function that might cause a mode switch). The signal
68 * stack is restored before exiting the SIGUSR2 handler.
69 *
70 * Note that POSIX standard says you can't modify the alternate
71 * signal stack while the process is executing on it. There is a
72 * hackaround though: we install a trampoline SIGUSR2 handler that
73 * sets up an alternate stack itself and calls the real handler.
74 * Then, when we call sigaltstack() there, we no longer get an EPERM,
75 * i.e. it now works.
76 *
77 * TODO:
78 * check if SIGSEGV handler works for all registers (including FP!)
79 */
80
81 #include <unistd.h>
82 #include <fcntl.h>
83 #include <time.h>
84 #include <errno.h>
85 #include <stdio.h>
86 #include <stdlib.h>
87 #include <string.h>
88 #include <pthread.h>
89 #include <sys/mman.h>
90 #include <sys/ipc.h>
91 #include <sys/shm.h>
92 #include <sys/stat.h>
93 #include <signal.h>
94
95 #include "sysdeps.h"
96 #include "main.h"
97 #include "version.h"
98 #include "prefs.h"
99 #include "prefs_editor.h"
100 #include "cpu_emulation.h"
101 #include "emul_op.h"
102 #include "xlowmem.h"
103 #include "xpram.h"
104 #include "timer.h"
105 #include "adb.h"
106 #include "video.h"
107 #include "sys.h"
108 #include "macos_util.h"
109 #include "rom_patches.h"
110 #include "user_strings.h"
111 #include "vm_alloc.h"
112 #include "sigsegv.h"
113 #include "sigregs.h"
114 #include "rpc.h"
115
116 #define DEBUG 0
117 #include "debug.h"
118
119
120 #ifdef HAVE_DIRENT_H
121 #include <dirent.h>
122 #endif
123
124 #ifdef USE_SDL
125 #include <SDL.h>
126 #endif
127
128 #ifndef USE_SDL_VIDEO
129 #include <X11/Xlib.h>
130 #endif
131
132 #ifdef ENABLE_GTK
133 #include <gtk/gtk.h>
134 #endif
135
136 #ifdef ENABLE_XF86_DGA
137 #include <X11/Xlib.h>
138 #include <X11/Xutil.h>
139 #include <X11/extensions/Xxf86dga.h>
140 #endif
141
142 #ifdef ENABLE_MON
143 #include "mon.h"
144 #endif
145
146
147 // Enable emulation of unaligned lmw/stmw?
148 #define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
149
150 // Enable Execute68k() safety checks?
151 #define SAFE_EXEC_68K 0
152
153 // Interrupts in EMUL_OP mode?
154 #define INTERRUPTS_IN_EMUL_OP_MODE 1
155
156 // Interrupts in native mode?
157 #define INTERRUPTS_IN_NATIVE_MODE 1
158
159
160 // Constants
161 const char ROM_FILE_NAME[] = "ROM";
162 const char ROM_FILE_NAME2[] = "Mac OS ROM";
163
164 #if !REAL_ADDRESSING
165 // FIXME: needs to be >= 0x04000000
166 const uintptr RAM_BASE = 0x10000000; // Base address of RAM
167 #endif
168 const uintptr ROM_BASE = 0x40800000; // Base address of ROM
169 #if REAL_ADDRESSING
170 const uint32 ROM_ALIGNMENT = 0x100000; // ROM must be aligned to a 1MB boundary
171 #endif
172 const uint32 SIG_STACK_SIZE = 0x10000; // Size of signal stack
173
174
175 // Global variables (exported)
176 #if !EMULATED_PPC
177 void *TOC = NULL; // Pointer to Thread Local Storage (r2)
178 void *R13 = NULL; // Pointer to .sdata section (r13 under Linux)
179 #endif
180 uint32 RAMBase; // Base address of Mac RAM
181 uint32 RAMSize; // Size of Mac RAM
182 uint32 ROMBase; // Base address of Mac ROM
183 uint32 KernelDataAddr; // Address of Kernel Data
184 uint32 BootGlobsAddr; // Address of BootGlobs structure at top of Mac RAM
185 uint32 DRCacheAddr; // Address of DR Cache
186 uint32 PVR; // Theoretical PVR
187 int64 CPUClockSpeed; // Processor clock speed (Hz)
188 int64 BusClockSpeed; // Bus clock speed (Hz)
189 int64 TimebaseSpeed; // Timebase clock speed (Hz)
190 uint8 *RAMBaseHost; // Base address of Mac RAM (host address space)
191 uint8 *ROMBaseHost; // Base address of Mac ROM (host address space)
192
193
194 // Global variables
195 #ifndef USE_SDL_VIDEO
196 char *x_display_name = NULL; // X11 display name
197 Display *x_display = NULL; // X11 display handle
198 #ifdef X11_LOCK_TYPE
199 X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
200 #endif
201 #endif
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 bool dr_cache_area_mapped = false; // Flag: Mac DR Cache mmap()ped
209 static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
210 static KernelData *kernel_data; // Pointer to Kernel Data
211 static EmulatorData *emulator_data;
212
213 static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes
214
215 static bool nvram_thread_active = false; // Flag: NVRAM watchdog installed
216 static volatile bool nvram_thread_cancel; // Flag: Cancel NVRAM thread
217 static pthread_t nvram_thread; // NVRAM watchdog
218 static bool tick_thread_active = false; // Flag: MacOS thread installed
219 static volatile bool tick_thread_cancel; // Flag: Cancel 60Hz thread
220 static pthread_t tick_thread; // 60Hz thread
221 static pthread_t emul_thread; // MacOS thread
222
223 static bool ready_for_signals = false; // Handler installed, signals can be sent
224 static int64 num_segv = 0; // Number of handled SEGV signals
225
226 static struct sigaction sigusr2_action; // Interrupt signal (of emulator thread)
227 #if EMULATED_PPC
228 static uintptr sig_stack = 0; // Stack for PowerPC interrupt routine
229 #else
230 static struct sigaction sigsegv_action; // Data access exception signal (of emulator thread)
231 static struct sigaction sigill_action; // Illegal instruction signal (of emulator thread)
232 static stack_t sig_stack; // Stack for signal handlers
233 static stack_t extra_stack; // Stack for SIGSEGV inside interrupt handler
234 static bool emul_thread_fatal = false; // Flag: MacOS thread crashed, tick thread shall dump debug output
235 static sigregs sigsegv_regs; // Register dump when crashed
236 static const char *crash_reason = NULL; // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
237 #endif
238
239 static rpc_connection_t *gui_connection = NULL; // RPC connection to the GUI
240 static const char *gui_connection_path = NULL; // GUI connection identifier
241
242 uint32 SheepMem::page_size; // Size of a native page
243 uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros
244 uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data
245 uintptr SheepMem::proc; // Bottom address of SheepShave procedures
246 uintptr SheepMem::data; // Top of SheepShaver data (stack like storage)
247
248
249 // Prototypes
250 static bool kernel_data_init(void);
251 static void kernel_data_exit(void);
252 static void Quit(void);
253 static void *emul_func(void *arg);
254 static void *nvram_func(void *arg);
255 static void *tick_func(void *arg);
256 #if EMULATED_PPC
257 extern void emul_ppc(uint32 start);
258 extern void init_emul_ppc(void);
259 extern void exit_emul_ppc(void);
260 sigsegv_return_t sigsegv_handler(sigsegv_info_t *sip);
261 #else
262 extern "C" void sigusr2_handler_init(int sig, siginfo_t *sip, void *scp);
263 extern "C" void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
264 static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
265 static void sigill_handler(int sig, siginfo_t *sip, void *scp);
266 #endif
267
268
269 // From asm_linux.S
270 #if !EMULATED_PPC
271 extern "C" void *get_sp(void);
272 extern "C" void *get_r2(void);
273 extern "C" void set_r2(void *);
274 extern "C" void *get_r13(void);
275 extern "C" void set_r13(void *);
276 extern "C" void flush_icache_range(uint32 start, uint32 end);
277 extern "C" void jump_to_rom(uint32 entry, uint32 context);
278 extern "C" void quit_emulator(void);
279 extern "C" void execute_68k(uint32 pc, M68kRegisters *r);
280 extern "C" void ppc_interrupt(uint32 entry, uint32 kernel_data);
281 extern "C" int atomic_add(int *var, int v);
282 extern "C" int atomic_and(int *var, int v);
283 extern "C" int atomic_or(int *var, int v);
284 extern void paranoia_check(void);
285 #endif
286
287
288 #if EMULATED_PPC
289 /*
290 * Return signal stack base
291 */
292
293 uintptr SignalStackBase(void)
294 {
295 return sig_stack + SIG_STACK_SIZE;
296 }
297
298
299 /*
300 * Atomic operations
301 */
302
303 #if HAVE_SPINLOCKS
304 static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED;
305 #else
306 #define spin_lock(LOCK)
307 #define spin_unlock(LOCK)
308 #endif
309
310 int atomic_add(int *var, int v)
311 {
312 spin_lock(&atomic_ops_lock);
313 int ret = *var;
314 *var += v;
315 spin_unlock(&atomic_ops_lock);
316 return ret;
317 }
318
319 int atomic_and(int *var, int v)
320 {
321 spin_lock(&atomic_ops_lock);
322 int ret = *var;
323 *var &= v;
324 spin_unlock(&atomic_ops_lock);
325 return ret;
326 }
327
328 int atomic_or(int *var, int v)
329 {
330 spin_lock(&atomic_ops_lock);
331 int ret = *var;
332 *var |= v;
333 spin_unlock(&atomic_ops_lock);
334 return ret;
335 }
336 #endif
337
338
339 /*
340 * Memory management helpers
341 */
342
343 static inline uint8 *vm_mac_acquire(uint32 size)
344 {
345 return (uint8 *)vm_acquire(size);
346 }
347
348 static inline int vm_mac_acquire_fixed(uint32 addr, uint32 size)
349 {
350 return vm_acquire_fixed(Mac2HostAddr(addr), size);
351 }
352
353 static inline int vm_mac_release(uint32 addr, uint32 size)
354 {
355 return vm_release(Mac2HostAddr(addr), size);
356 }
357
358
359 /*
360 * Main program
361 */
362
363 static void usage(const char *prg_name)
364 {
365 printf("Usage: %s [OPTION...]\n", prg_name);
366 printf("\nUnix options:\n");
367 printf(" --display STRING\n X display to use\n");
368 PrefsPrintUsage();
369 exit(0);
370 }
371
372 static bool valid_vmdir(const char *path)
373 {
374 const int suffix_len = sizeof(".sheepvm") - 1;
375 int len = strlen(path);
376 if (len && path[len - 1] == '/') // to support both ".sheepvm" and ".sheepvm/"
377 len--;
378 if (len > suffix_len && !strncmp(path + len - suffix_len, ".sheepvm", suffix_len)) {
379 struct stat d;
380 if (!stat(path, &d) && S_ISDIR(d.st_mode)) {
381 return true;
382 }
383 }
384 return false;
385 }
386
387 static void get_system_info(void)
388 {
389 #if !EMULATED_PPC
390 FILE *proc_file;
391 #endif
392
393 PVR = 0x00040000; // Default: 604
394 CPUClockSpeed = 100000000; // Default: 100MHz
395 BusClockSpeed = 100000000; // Default: 100MHz
396 TimebaseSpeed = 25000000; // Default: 25MHz
397
398 #if EMULATED_PPC
399 PVR = 0x000c0000; // Default: 7400 (with AltiVec)
400 #elif defined(__APPLE__) && defined(__MACH__)
401 proc_file = popen("ioreg -c IOPlatformDevice", "r");
402 if (proc_file) {
403 char line[256];
404 bool powerpc_node = false;
405 while (fgets(line, sizeof(line) - 1, proc_file)) {
406 // Read line
407 int len = strlen(line);
408 if (len == 0)
409 continue;
410 line[len - 1] = 0;
411
412 // Parse line
413 if (strstr(line, "o PowerPC,"))
414 powerpc_node = true;
415 else if (powerpc_node) {
416 uint32 value;
417 char head[256];
418 if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
419 PVR = value;
420 else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
421 CPUClockSpeed = value;
422 else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
423 BusClockSpeed = value;
424 else if (sscanf(line, "%[ |]\"timebase-frequency\" = <%x>", head, &value) == 2)
425 TimebaseSpeed = value;
426 else if (strchr(line, '}'))
427 powerpc_node = false;
428 }
429 }
430 fclose(proc_file);
431 } else {
432 char str[256];
433 sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
434 WarningAlert(str);
435 }
436 #else
437 proc_file = fopen("/proc/cpuinfo", "r");
438 if (proc_file) {
439 // CPU specs from Linux kernel
440 // TODO: make it more generic with features (e.g. AltiVec) and
441 // cache information and friends for NameRegistry
442 static const struct {
443 uint32 pvr_mask;
444 uint32 pvr_value;
445 const char *cpu_name;
446 }
447 cpu_specs[] = {
448 { 0xffff0000, 0x00010000, "601" },
449 { 0xffff0000, 0x00030000, "603" },
450 { 0xffff0000, 0x00060000, "603e" },
451 { 0xffff0000, 0x00070000, "603ev" },
452 { 0xffff0000, 0x00040000, "604" },
453 { 0xfffff000, 0x00090000, "604e" },
454 { 0xffff0000, 0x00090000, "604r" },
455 { 0xffff0000, 0x000a0000, "604ev" },
456 { 0xffffffff, 0x00084202, "740/750" },
457 { 0xfffff000, 0x00083000, "745/755" },
458 { 0xfffffff0, 0x00080100, "750CX" },
459 { 0xfffffff0, 0x00082200, "750CX" },
460 { 0xfffffff0, 0x00082210, "750CXe" },
461 { 0xffffff00, 0x70000100, "750FX" },
462 { 0xffffffff, 0x70000200, "750FX" },
463 { 0xffff0000, 0x70000000, "750FX" },
464 { 0xffff0000, 0x70020000, "750GX" },
465 { 0xffff0000, 0x00080000, "740/750" },
466 { 0xffffffff, 0x000c1101, "7400 (1.1)" },
467 { 0xffff0000, 0x000c0000, "7400" },
468 { 0xffff0000, 0x800c0000, "7410" },
469 { 0xffffffff, 0x80000200, "7450" },
470 { 0xffffffff, 0x80000201, "7450" },
471 { 0xffff0000, 0x80000000, "7450" },
472 { 0xffffff00, 0x80010100, "7455" },
473 { 0xffffffff, 0x80010200, "7455" },
474 { 0xffff0000, 0x80010000, "7455" },
475 { 0xffff0000, 0x80020000, "7457" },
476 { 0xffff0000, 0x80030000, "7447A" },
477 { 0xffff0000, 0x80040000, "7448" },
478 { 0x7fff0000, 0x00810000, "82xx" },
479 { 0x7fff0000, 0x00820000, "8280" },
480 { 0xffff0000, 0x00400000, "Power3 (630)" },
481 { 0xffff0000, 0x00410000, "Power3 (630+)" },
482 { 0xffff0000, 0x00360000, "I-star" },
483 { 0xffff0000, 0x00370000, "S-star" },
484 { 0xffff0000, 0x00350000, "Power4" },
485 { 0xffff0000, 0x00390000, "PPC970" },
486 { 0xffff0000, 0x003c0000, "PPC970FX" },
487 { 0xffff0000, 0x00440000, "PPC970MP" },
488 { 0xffff0000, 0x003a0000, "POWER5 (gr)" },
489 { 0xffff0000, 0x003b0000, "POWER5+ (gs)" },
490 { 0xffff0000, 0x003e0000, "POWER6" },
491 { 0xffff0000, 0x00700000, "Cell Broadband Engine" },
492 { 0x7fff0000, 0x00900000, "PA6T" },
493 { 0, 0, 0 }
494 };
495
496 char line[256];
497 while(fgets(line, 255, proc_file)) {
498 // Read line
499 int len = strlen(line);
500 if (len == 0)
501 continue;
502 line[len-1] = 0;
503
504 // Parse line
505 int i;
506 float f;
507 char value[256];
508 if (sscanf(line, "cpu : %[^,]", value) == 1) {
509 // Search by name
510 const char *cpu_name = NULL;
511 for (int i = 0; cpu_specs[i].pvr_mask != 0; i++) {
512 if (strcmp(cpu_specs[i].cpu_name, value) == 0) {
513 cpu_name = cpu_specs[i].cpu_name;
514 PVR = cpu_specs[i].pvr_value;
515 break;
516 }
517 }
518 if (cpu_name == NULL)
519 printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
520 else
521 printf("Found a PowerPC %s processor\n", cpu_name);
522 }
523 if (sscanf(line, "clock : %fMHz", &f) == 1)
524 CPUClockSpeed = BusClockSpeed = ((int64)f) * 1000000;
525 else if (sscanf(line, "clock : %dMHz", &i) == 1)
526 CPUClockSpeed = BusClockSpeed = i * 1000000;
527 }
528 fclose(proc_file);
529 } else {
530 sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
531 WarningAlert(str);
532 }
533
534 // Get actual bus frequency
535 proc_file = fopen("/proc/device-tree/clock-frequency", "r");
536 if (proc_file) {
537 union { uint8 b[4]; uint32 l; } value;
538 if (fread(value.b, sizeof(value), 1, proc_file) == 1)
539 BusClockSpeed = value.l;
540 fclose(proc_file);
541 }
542
543 // Get actual timebase frequency
544 TimebaseSpeed = BusClockSpeed / 4;
545 DIR *cpus_dir;
546 if ((cpus_dir = opendir("/proc/device-tree/cpus")) != NULL) {
547 struct dirent *cpu_entry;
548 while ((cpu_entry = readdir(cpus_dir)) != NULL) {
549 if (strstr(cpu_entry->d_name, "PowerPC,") == cpu_entry->d_name) {
550 char timebase_freq_node[256];
551 sprintf(timebase_freq_node, "/proc/device-tree/cpus/%s/timebase-frequency", cpu_entry->d_name);
552 proc_file = fopen(timebase_freq_node, "r");
553 if (proc_file) {
554 union { uint8 b[4]; uint32 l; } value;
555 if (fread(value.b, sizeof(value), 1, proc_file) == 1)
556 TimebaseSpeed = value.l;
557 fclose(proc_file);
558 }
559 }
560 }
561 closedir(cpus_dir);
562 }
563 #endif
564
565 // Remap any newer G4/G5 processor to plain G4 for compatibility
566 switch (PVR >> 16) {
567 case 0x8000: // 7450
568 case 0x8001: // 7455
569 case 0x8002: // 7457
570 case 0x8003: // 7447A
571 case 0x8004: // 7448
572 case 0x0039: // 970
573 case 0x003c: // 970FX
574 case 0x0044: // 970MP
575 PVR = 0x000c0000; // 7400
576 break;
577 }
578 D(bug("PVR: %08x (assumed)\n", PVR));
579 }
580
581 static bool load_mac_rom(void)
582 {
583 uint32 rom_size, actual;
584 uint8 *rom_tmp;
585 const char *rom_path = PrefsFindString("rom");
586 int rom_fd = open(rom_path && *rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY);
587 if (rom_fd < 0) {
588 rom_fd = open(ROM_FILE_NAME2, O_RDONLY);
589 if (rom_fd < 0) {
590 ErrorAlert(GetString(STR_NO_ROM_FILE_ERR));
591 return false;
592 }
593 }
594 printf("%s", GetString(STR_READING_ROM_FILE));
595 rom_size = lseek(rom_fd, 0, SEEK_END);
596 lseek(rom_fd, 0, SEEK_SET);
597 rom_tmp = new uint8[ROM_SIZE];
598 actual = read(rom_fd, (void *)rom_tmp, ROM_SIZE);
599 close(rom_fd);
600
601 // Decode Mac ROM
602 if (!DecodeROM(rom_tmp, actual)) {
603 if (rom_size != 4*1024*1024) {
604 ErrorAlert(GetString(STR_ROM_SIZE_ERR));
605 return false;
606 } else {
607 ErrorAlert(GetString(STR_ROM_FILE_READ_ERR));
608 return false;
609 }
610 }
611 delete[] rom_tmp;
612 return true;
613 }
614
615 static bool install_signal_handlers(void)
616 {
617 char str[256];
618 #if !EMULATED_PPC
619 // Create and install stacks for signal handlers
620 sig_stack.ss_sp = malloc(SIG_STACK_SIZE);
621 D(bug("Signal stack at %p\n", sig_stack.ss_sp));
622 if (sig_stack.ss_sp == NULL) {
623 ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
624 return false;
625 }
626 sig_stack.ss_flags = 0;
627 sig_stack.ss_size = SIG_STACK_SIZE;
628 if (sigaltstack(&sig_stack, NULL) < 0) {
629 sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
630 ErrorAlert(str);
631 return false;
632 }
633 extra_stack.ss_sp = malloc(SIG_STACK_SIZE);
634 D(bug("Extra stack at %p\n", extra_stack.ss_sp));
635 if (extra_stack.ss_sp == NULL) {
636 ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
637 return false;
638 }
639 extra_stack.ss_flags = 0;
640 extra_stack.ss_size = SIG_STACK_SIZE;
641
642 // Install SIGSEGV and SIGBUS handlers
643 sigemptyset(&sigsegv_action.sa_mask); // Block interrupts during SEGV handling
644 sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
645 sigsegv_action.sa_sigaction = sigsegv_handler;
646 sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
647 #ifdef HAVE_SIGNAL_SA_RESTORER
648 sigsegv_action.sa_restorer = NULL;
649 #endif
650 if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
651 sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
652 ErrorAlert(str);
653 return false;
654 }
655 if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
656 sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGBUS", strerror(errno));
657 ErrorAlert(str);
658 return false;
659 }
660 #else
661 // Install SIGSEGV handler for CPU emulator
662 if (!sigsegv_install_handler(sigsegv_handler)) {
663 sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGSEGV", strerror(errno));
664 ErrorAlert(str);
665 return false;
666 }
667 #endif
668 return true;
669 }
670
671 static bool init_sdl()
672 {
673 int sdl_flags = 0;
674 #ifdef USE_SDL_VIDEO
675 sdl_flags |= SDL_INIT_VIDEO;
676 #endif
677 #ifdef USE_SDL_AUDIO
678 sdl_flags |= SDL_INIT_AUDIO;
679 #endif
680 assert(sdl_flags != 0);
681
682 #ifdef USE_SDL_VIDEO
683 // Don't let SDL block the screensaver
684 setenv("SDL_VIDEO_ALLOW_SCREENSAVER", "1", TRUE);
685
686 // Make SDL pass through command-clicks and option-clicks unaltered
687 setenv("SDL_HAS3BUTTONMOUSE", "1", TRUE);
688 #endif
689
690 if (SDL_Init(sdl_flags) == -1) {
691 char str[256];
692 sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
693 ErrorAlert(str);
694 return false;
695 }
696 atexit(SDL_Quit);
697
698 // Don't let SDL catch SIGINT and SIGTERM signals
699 signal(SIGINT, SIG_DFL);
700 signal(SIGTERM, SIG_DFL);
701 return true;
702 }
703
704 int main(int argc, char **argv)
705 {
706 char str[256];
707 bool memory_mapped_from_zero, ram_rom_areas_contiguous;
708 const char *vmdir = NULL;
709
710 // Initialize variables
711 RAMBase = 0;
712 tzset();
713
714 // Print some info
715 printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR);
716 printf(" %s\n", GetString(STR_ABOUT_TEXT2));
717
718 #if !EMULATED_PPC
719 #ifdef SYSTEM_CLOBBERS_R2
720 // Get TOC pointer
721 TOC = get_r2();
722 #endif
723 #ifdef SYSTEM_CLOBBERS_R13
724 // Get r13 register
725 R13 = get_r13();
726 #endif
727 #endif
728
729 // Parse command line arguments
730 for (int i=1; i<argc; i++) {
731 if (strcmp(argv[i], "--help") == 0) {
732 usage(argv[0]);
733 #ifndef USE_SDL_VIDEO
734 } else if (strcmp(argv[i], "--display") == 0) {
735 i++;
736 if (i < argc)
737 x_display_name = strdup(argv[i]);
738 #endif
739 } else if (strcmp(argv[i], "--gui-connection") == 0) {
740 argv[i++] = NULL;
741 if (i < argc) {
742 gui_connection_path = argv[i];
743 argv[i] = NULL;
744 }
745 } else if (valid_vmdir(argv[i])) {
746 vmdir = argv[i];
747 argv[i] = NULL;
748 printf("Using %s as vmdir.\n", vmdir);
749 if (chdir(vmdir)) {
750 printf("Failed to chdir to %s. Good bye.", vmdir);
751 exit(1);
752 }
753 break;
754 }
755 }
756
757 // Remove processed arguments
758 for (int i=1; i<argc; i++) {
759 int k;
760 for (k=i; k<argc; k++)
761 if (argv[k] != NULL)
762 break;
763 if (k > i) {
764 k -= i;
765 for (int j=i+k; j<argc; j++)
766 argv[j-k] = argv[j];
767 argc -= k;
768 }
769 }
770
771 // Connect to the external GUI
772 if (gui_connection_path) {
773 if ((gui_connection = rpc_init_client(gui_connection_path)) == NULL) {
774 fprintf(stderr, "Failed to initialize RPC client connection to the GUI\n");
775 return 1;
776 }
777 }
778
779 #ifdef ENABLE_GTK
780 if (!gui_connection) {
781 // Init GTK
782 gtk_set_locale();
783 gtk_init(&argc, &argv);
784 }
785 #endif
786
787 // Read preferences
788 PrefsInit(vmdir, argc, argv);
789
790 // Any command line arguments left?
791 for (int i=1; i<argc; i++) {
792 if (argv[i][0] == '-') {
793 fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
794 usage(argv[0]);
795 }
796 }
797
798 #ifdef USE_SDL
799 // Initialize SDL system
800 if (!init_sdl())
801 goto quit;
802 #endif
803
804 #ifndef USE_SDL_VIDEO
805 // Open display
806 x_display = XOpenDisplay(x_display_name);
807 if (x_display == NULL) {
808 char str[256];
809 sprintf(str, GetString(STR_NO_XSERVER_ERR), XDisplayName(x_display_name));
810 ErrorAlert(str);
811 goto quit;
812 }
813
814 #if defined(ENABLE_XF86_DGA) && !defined(ENABLE_MON)
815 // Fork out, so we can return from fullscreen mode when things get ugly
816 XF86DGAForkApp(DefaultScreen(x_display));
817 #endif
818 #endif
819
820 #ifdef ENABLE_MON
821 // Initialize mon
822 mon_init();
823 #endif
824
825 // Install signal handlers
826 if (!install_signal_handlers())
827 goto quit;
828
829 // Initialize VM system
830 vm_init();
831
832 // Get system info
833 get_system_info();
834
835 // Init system routines
836 SysInit();
837
838 // Show preferences editor
839 if (!PrefsFindBool("nogui"))
840 if (!PrefsEditor())
841 goto quit;
842
843 #if !EMULATED_PPC
844 // Check some things
845 paranoia_check();
846 #endif
847
848 // Open /dev/zero
849 zero_fd = open("/dev/zero", O_RDWR);
850 if (zero_fd < 0) {
851 sprintf(str, GetString(STR_NO_DEV_ZERO_ERR), strerror(errno));
852 ErrorAlert(str);
853 goto quit;
854 }
855
856 // Create areas for Kernel Data
857 if (!kernel_data_init())
858 goto quit;
859 kernel_data = (KernelData *)Mac2HostAddr(KERNEL_DATA_BASE);
860 emulator_data = &kernel_data->ed;
861 KernelDataAddr = KERNEL_DATA_BASE;
862 D(bug("Kernel Data at %p (%08x)\n", kernel_data, KERNEL_DATA_BASE));
863 D(bug("Emulator Data at %p (%08x)\n", emulator_data, KERNEL_DATA_BASE + offsetof(KernelData, ed)));
864
865 // Create area for DR Cache
866 if (vm_mac_acquire_fixed(DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
867 sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
868 ErrorAlert(str);
869 goto quit;
870 }
871 dr_emulator_area_mapped = true;
872 if (vm_mac_acquire_fixed(DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
873 sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
874 ErrorAlert(str);
875 goto quit;
876 }
877 dr_cache_area_mapped = true;
878 #if !EMULATED_PPC
879 if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
880 sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
881 ErrorAlert(str);
882 goto quit;
883 }
884 #endif
885 DRCacheAddr = DR_CACHE_BASE;
886 D(bug("DR Cache at %p\n", DRCacheAddr));
887
888 // Create area for SheepShaver data
889 if (!SheepMem::Init()) {
890 sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
891 ErrorAlert(str);
892 goto quit;
893 }
894
895 // Create area for Mac RAM
896 RAMSize = PrefsFindInt32("ramsize");
897 if (RAMSize < 8*1024*1024) {
898 WarningAlert(GetString(STR_SMALL_RAM_WARN));
899 RAMSize = 8*1024*1024;
900 }
901 memory_mapped_from_zero = false;
902 ram_rom_areas_contiguous = false;
903 #if REAL_ADDRESSING && HAVE_LINKER_SCRIPT
904 if (vm_mac_acquire_fixed(0, RAMSize) == 0) {
905 D(bug("Could allocate RAM from 0x0000\n"));
906 RAMBase = 0;
907 RAMBaseHost = Mac2HostAddr(RAMBase);
908 memory_mapped_from_zero = true;
909 }
910 #endif
911 if (!memory_mapped_from_zero) {
912 #ifndef PAGEZERO_HACK
913 // Create Low Memory area (0x0000..0x3000)
914 if (vm_mac_acquire_fixed(0, 0x3000) < 0) {
915 sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
916 ErrorAlert(str);
917 goto quit;
918 }
919 lm_area_mapped = true;
920 #endif
921 #if REAL_ADDRESSING
922 // Allocate RAM at any address. Since ROM must be higher than RAM, allocate the RAM
923 // and ROM areas contiguously, plus a little extra to allow for ROM address alignment.
924 RAMBaseHost = vm_mac_acquire(RAMSize + ROM_AREA_SIZE + ROM_ALIGNMENT);
925 if (RAMBaseHost == VM_MAP_FAILED) {
926 sprintf(str, GetString(STR_RAM_ROM_MMAP_ERR), strerror(errno));
927 ErrorAlert(str);
928 goto quit;
929 }
930 RAMBase = Host2MacAddr(RAMBaseHost);
931 ROMBase = (RAMBase + RAMSize + ROM_ALIGNMENT -1) & -ROM_ALIGNMENT;
932 ROMBaseHost = Mac2HostAddr(ROMBase);
933 ram_rom_areas_contiguous = true;
934 #else
935 if (vm_mac_acquire_fixed(RAM_BASE, RAMSize) < 0) {
936 sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
937 ErrorAlert(str);
938 goto quit;
939 }
940 RAMBase = RAM_BASE;
941 RAMBaseHost = Mac2HostAddr(RAMBase);
942 #endif
943 }
944 #if !EMULATED_PPC
945 if (vm_protect(RAMBaseHost, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
946 sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
947 ErrorAlert(str);
948 goto quit;
949 }
950 #endif
951 ram_area_mapped = true;
952 D(bug("RAM area at %p (%08x)\n", RAMBaseHost, RAMBase));
953
954 if (RAMBase > KernelDataAddr) {
955 ErrorAlert(GetString(STR_RAM_AREA_TOO_HIGH_ERR));
956 goto quit;
957 }
958
959 // Create area for Mac ROM
960 if (!ram_rom_areas_contiguous) {
961 if (vm_mac_acquire_fixed(ROM_BASE, ROM_AREA_SIZE) < 0) {
962 sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
963 ErrorAlert(str);
964 goto quit;
965 }
966 ROMBase = ROM_BASE;
967 ROMBaseHost = Mac2HostAddr(ROMBase);
968 }
969 #if !EMULATED_PPC
970 if (vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
971 sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
972 ErrorAlert(str);
973 goto quit;
974 }
975 #endif
976 rom_area_mapped = true;
977 D(bug("ROM area at %p (%08x)\n", ROMBaseHost, ROMBase));
978
979 if (RAMBase > ROMBase) {
980 ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR));
981 goto quit;
982 }
983
984 // Load Mac ROM
985 if (!load_mac_rom())
986 goto quit;
987
988 // Initialize everything
989 if (!InitAll(vmdir))
990 goto quit;
991 D(bug("Initialization complete\n"));
992
993 // Clear caches (as we loaded and patched code) and write protect ROM
994 #if !EMULATED_PPC
995 flush_icache_range(ROMBase, ROMBase + ROM_AREA_SIZE);
996 #endif
997 vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
998
999 // Start 60Hz thread
1000 tick_thread_cancel = false;
1001 tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
1002 D(bug("Tick thread installed (%ld)\n", tick_thread));
1003
1004 // Start NVRAM watchdog thread
1005 memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1006 nvram_thread_cancel = false;
1007 nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
1008 D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
1009
1010 #if !EMULATED_PPC
1011 // Install SIGILL handler
1012 sigemptyset(&sigill_action.sa_mask); // Block interrupts during ILL handling
1013 sigaddset(&sigill_action.sa_mask, SIGUSR2);
1014 sigill_action.sa_sigaction = sigill_handler;
1015 sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
1016 #ifdef HAVE_SIGNAL_SA_RESTORER
1017 sigill_action.sa_restorer = NULL;
1018 #endif
1019 if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
1020 sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGILL", strerror(errno));
1021 ErrorAlert(str);
1022 goto quit;
1023 }
1024 #endif
1025
1026 #if !EMULATED_PPC
1027 // Install interrupt signal handler
1028 sigemptyset(&sigusr2_action.sa_mask);
1029 sigusr2_action.sa_sigaction = sigusr2_handler_init;
1030 sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
1031 #ifdef HAVE_SIGNAL_SA_RESTORER
1032 sigusr2_action.sa_restorer = NULL;
1033 #endif
1034 if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
1035 sprintf(str, GetString(STR_SIG_INSTALL_ERR), "SIGUSR2", strerror(errno));
1036 ErrorAlert(str);
1037 goto quit;
1038 }
1039 #endif
1040
1041 // Get my thread ID and execute MacOS thread function
1042 emul_thread = pthread_self();
1043 D(bug("MacOS thread is %ld\n", emul_thread));
1044 emul_func(NULL);
1045
1046 quit:
1047 Quit();
1048 return 0;
1049 }
1050
1051
1052 /*
1053 * Cleanup and quit
1054 */
1055
1056 static void Quit(void)
1057 {
1058 #if EMULATED_PPC
1059 // Exit PowerPC emulation
1060 exit_emul_ppc();
1061 #endif
1062
1063 // Stop 60Hz thread
1064 if (tick_thread_active) {
1065 tick_thread_cancel = true;
1066 pthread_cancel(tick_thread);
1067 pthread_join(tick_thread, NULL);
1068 }
1069
1070 // Stop NVRAM watchdog thread
1071 if (nvram_thread_active) {
1072 nvram_thread_cancel = true;
1073 pthread_cancel(nvram_thread);
1074 pthread_join(nvram_thread, NULL);
1075 }
1076
1077 #if !EMULATED_PPC
1078 // Uninstall SIGSEGV and SIGBUS handlers
1079 sigemptyset(&sigsegv_action.sa_mask);
1080 sigsegv_action.sa_handler = SIG_DFL;
1081 sigsegv_action.sa_flags = 0;
1082 sigaction(SIGSEGV, &sigsegv_action, NULL);
1083 sigaction(SIGBUS, &sigsegv_action, NULL);
1084
1085 // Uninstall SIGILL handler
1086 sigemptyset(&sigill_action.sa_mask);
1087 sigill_action.sa_handler = SIG_DFL;
1088 sigill_action.sa_flags = 0;
1089 sigaction(SIGILL, &sigill_action, NULL);
1090
1091 // Delete stacks for signal handlers
1092 if (sig_stack.ss_sp)
1093 free(sig_stack.ss_sp);
1094 if (extra_stack.ss_sp)
1095 free(extra_stack.ss_sp);
1096 #endif
1097
1098 // Deinitialize everything
1099 ExitAll();
1100
1101 // Delete SheepShaver globals
1102 SheepMem::Exit();
1103
1104 // Delete RAM area
1105 if (ram_area_mapped)
1106 vm_mac_release(RAMBase, RAMSize);
1107
1108 // Delete ROM area
1109 if (rom_area_mapped)
1110 vm_mac_release(ROMBase, ROM_AREA_SIZE);
1111
1112 // Delete DR cache areas
1113 if (dr_emulator_area_mapped)
1114 vm_mac_release(DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1115 if (dr_cache_area_mapped)
1116 vm_mac_release(DR_CACHE_BASE, DR_CACHE_SIZE);
1117
1118 // Delete Kernel Data area
1119 kernel_data_exit();
1120
1121 // Delete Low Memory area
1122 if (lm_area_mapped)
1123 vm_mac_release(0, 0x3000);
1124
1125 // Close /dev/zero
1126 if (zero_fd > 0)
1127 close(zero_fd);
1128
1129 // Exit system routines
1130 SysExit();
1131
1132 // Exit preferences
1133 PrefsExit();
1134
1135 #ifdef ENABLE_MON
1136 // Exit mon
1137 mon_exit();
1138 #endif
1139
1140 // Close X11 server connection
1141 #ifndef USE_SDL_VIDEO
1142 if (x_display)
1143 XCloseDisplay(x_display);
1144 #endif
1145
1146 // Notify GUI we are about to leave
1147 if (gui_connection) {
1148 if (rpc_method_invoke(gui_connection, RPC_METHOD_EXIT, RPC_TYPE_INVALID) == RPC_ERROR_NO_ERROR)
1149 rpc_method_wait_for_reply(gui_connection, RPC_TYPE_INVALID);
1150 }
1151
1152 exit(0);
1153 }
1154
1155
1156 /*
1157 * Initialize Kernel Data segments
1158 */
1159
1160 static bool kernel_data_init(void)
1161 {
1162 char str[256];
1163 uint32 kernel_area_size = (KERNEL_AREA_SIZE + SHMLBA - 1) & -SHMLBA;
1164
1165 kernel_area = shmget(IPC_PRIVATE, kernel_area_size, 0600);
1166 if (kernel_area == -1) {
1167 sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno));
1168 ErrorAlert(str);
1169 return false;
1170 }
1171 void *kernel_addr = Mac2HostAddr(KERNEL_DATA_BASE & -SHMLBA);
1172 if (shmat(kernel_area, kernel_addr, 0) != kernel_addr) {
1173 sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno));
1174 ErrorAlert(str);
1175 return false;
1176 }
1177 kernel_addr = Mac2HostAddr(KERNEL_DATA2_BASE & -SHMLBA);
1178 if (shmat(kernel_area, kernel_addr, 0) != kernel_addr) {
1179 sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno));
1180 ErrorAlert(str);
1181 return false;
1182 }
1183 return true;
1184 }
1185
1186
1187 /*
1188 * Deallocate Kernel Data segments
1189 */
1190
1191 static void kernel_data_exit(void)
1192 {
1193 if (kernel_area >= 0) {
1194 shmdt(Mac2HostAddr(KERNEL_DATA_BASE & -SHMLBA));
1195 shmdt(Mac2HostAddr(KERNEL_DATA2_BASE & -SHMLBA));
1196 shmctl(kernel_area, IPC_RMID, NULL);
1197 }
1198 }
1199
1200
1201 /*
1202 * Jump into Mac ROM, start 680x0 emulator
1203 */
1204
1205 #if EMULATED_PPC
1206 void jump_to_rom(uint32 entry)
1207 {
1208 init_emul_ppc();
1209 emul_ppc(entry);
1210 }
1211 #endif
1212
1213
1214 /*
1215 * Emulator thread function
1216 */
1217
1218 static void *emul_func(void *arg)
1219 {
1220 // We're now ready to receive signals
1221 ready_for_signals = true;
1222
1223 // Decrease priority, so more time-critical things like audio will work better
1224 nice(1);
1225
1226 // Jump to ROM boot routine
1227 D(bug("Jumping to ROM\n"));
1228 #if EMULATED_PPC
1229 jump_to_rom(ROMBase + 0x310000);
1230 #else
1231 jump_to_rom(ROMBase + 0x310000, (uint32)emulator_data);
1232 #endif
1233 D(bug("Returned from ROM\n"));
1234
1235 // We're no longer ready to receive signals
1236 ready_for_signals = false;
1237 return NULL;
1238 }
1239
1240
1241 #if !EMULATED_PPC
1242 /*
1243 * Execute 68k subroutine (must be ended with RTS)
1244 * This must only be called by the emul_thread when in EMUL_OP mode
1245 * r->a[7] is unused, the routine runs on the caller's stack
1246 */
1247
1248 void Execute68k(uint32 pc, M68kRegisters *r)
1249 {
1250 #if SAFE_EXEC_68K
1251 if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
1252 printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
1253 if (!pthread_equal(pthread_self(), emul_thread))
1254 printf("FATAL: Execute68k() not called from emul_thread\n");
1255 #endif
1256 execute_68k(pc, r);
1257 }
1258
1259
1260 /*
1261 * Execute 68k A-Trap from EMUL_OP routine
1262 * r->a[7] is unused, the routine runs on the caller's stack
1263 */
1264
1265 void Execute68kTrap(uint16 trap, M68kRegisters *r)
1266 {
1267 uint16 proc[2] = {trap, M68K_RTS};
1268 Execute68k((uint32)proc, r);
1269 }
1270 #endif
1271
1272
1273 /*
1274 * Quit emulator (cause return from jump_to_rom)
1275 */
1276
1277 void QuitEmulator(void)
1278 {
1279 #if EMULATED_PPC
1280 Quit();
1281 #else
1282 quit_emulator();
1283 #endif
1284 }
1285
1286
1287 /*
1288 * Dump 68k registers
1289 */
1290
1291 void Dump68kRegs(M68kRegisters *r)
1292 {
1293 // Display 68k registers
1294 for (int i=0; i<8; i++) {
1295 printf("d%d: %08x", i, r->d[i]);
1296 if (i == 3 || i == 7)
1297 printf("\n");
1298 else
1299 printf(", ");
1300 }
1301 for (int i=0; i<8; i++) {
1302 printf("a%d: %08x", i, r->a[i]);
1303 if (i == 3 || i == 7)
1304 printf("\n");
1305 else
1306 printf(", ");
1307 }
1308 }
1309
1310
1311 /*
1312 * Make code executable
1313 */
1314
1315 void MakeExecutable(int dummy, uint32 start, uint32 length)
1316 {
1317 if ((start >= ROMBase) && (start < (ROMBase + ROM_SIZE)))
1318 return;
1319 #if EMULATED_PPC
1320 FlushCodeCache(start, start + length);
1321 #else
1322 flush_icache_range(start, start + length);
1323 #endif
1324 }
1325
1326
1327 /*
1328 * NVRAM watchdog thread (saves NVRAM every minute)
1329 */
1330
1331 static void nvram_watchdog(void)
1332 {
1333 if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1334 memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1335 SaveXPRAM();
1336 }
1337 }
1338
1339 static void *nvram_func(void *arg)
1340 {
1341 while (!nvram_thread_cancel) {
1342 for (int i=0; i<60 && !nvram_thread_cancel; i++)
1343 Delay_usec(999999); // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1344 nvram_watchdog();
1345 }
1346 return NULL;
1347 }
1348
1349
1350 /*
1351 * 60Hz thread (really 60.15Hz)
1352 */
1353
1354 static void *tick_func(void *arg)
1355 {
1356 int tick_counter = 0;
1357 uint64 start = GetTicks_usec();
1358 int64 ticks = 0;
1359 uint64 next = GetTicks_usec();
1360
1361 while (!tick_thread_cancel) {
1362
1363 // Wait
1364 next += 16625;
1365 int64 delay = next - GetTicks_usec();
1366 if (delay > 0)
1367 Delay_usec(delay);
1368 else if (delay < -16625)
1369 next = GetTicks_usec();
1370 ticks++;
1371
1372 #if !EMULATED_PPC
1373 // Did we crash?
1374 if (emul_thread_fatal) {
1375
1376 // Yes, dump registers
1377 sigregs *r = &sigsegv_regs;
1378 char str[256];
1379 if (crash_reason == NULL)
1380 crash_reason = "SIGSEGV";
1381 sprintf(str, "%s\n"
1382 " pc %08lx lr %08lx ctr %08lx msr %08lx\n"
1383 " xer %08lx cr %08lx \n"
1384 " r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
1385 " r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n"
1386 " r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n"
1387 " r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n"
1388 " r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n"
1389 " r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
1390 " r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
1391 " r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
1392 crash_reason,
1393 r->nip, r->link, r->ctr, r->msr,
1394 r->xer, r->ccr,
1395 r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1396 r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1397 r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1398 r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1399 r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1400 r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1401 r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1402 r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1403 printf(str);
1404 VideoQuitFullScreen();
1405
1406 #ifdef ENABLE_MON
1407 // Start up mon in real-mode
1408 printf("Welcome to the sheep factory.\n");
1409 char *arg[4] = {"mon", "-m", "-r", NULL};
1410 mon(3, arg);
1411 #endif
1412 return NULL;
1413 }
1414 #endif
1415
1416 // Pseudo Mac 1Hz interrupt, update local time
1417 if (++tick_counter > 60) {
1418 tick_counter = 0;
1419 WriteMacInt32(0x20c, TimerDateTime());
1420 }
1421
1422 // Trigger 60Hz interrupt
1423 if (ReadMacInt32(XLM_IRQ_NEST) == 0) {
1424 SetInterruptFlag(INTFLAG_VIA);
1425 TriggerInterrupt();
1426 }
1427 }
1428
1429 uint64 end = GetTicks_usec();
1430 D(bug("%lld ticks in %lld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1431 return NULL;
1432 }
1433
1434
1435 /*
1436 * Pthread configuration
1437 */
1438
1439 void Set_pthread_attr(pthread_attr_t *attr, int priority)
1440 {
1441 #ifdef HAVE_PTHREADS
1442 pthread_attr_init(attr);
1443 #if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1444 // Some of these only work for superuser
1445 if (geteuid() == 0) {
1446 pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1447 pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1448 struct sched_param fifo_param;
1449 fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1450 sched_get_priority_max(SCHED_FIFO)) / 2 +
1451 priority);
1452 pthread_attr_setschedparam(attr, &fifo_param);
1453 }
1454 if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1455 #ifdef PTHREAD_SCOPE_BOUND_NP
1456 // If system scope is not available (eg. we're not running
1457 // with CAP_SCHED_MGT capability on an SGI box), try bound
1458 // scope. It exposes pthread scheduling to the kernel,
1459 // without setting realtime priority.
1460 pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1461 #endif
1462 }
1463 #endif
1464 #endif
1465 }
1466
1467
1468 /*
1469 * Mutexes
1470 */
1471
1472 #ifdef HAVE_PTHREADS
1473
1474 struct B2_mutex {
1475 B2_mutex() {
1476 pthread_mutexattr_t attr;
1477 pthread_mutexattr_init(&attr);
1478 // Initialize the mutex for priority inheritance --
1479 // required for accurate timing.
1480 #if defined(HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL) && !defined(__CYGWIN__)
1481 pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
1482 #endif
1483 #if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
1484 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
1485 #endif
1486 #ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
1487 pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
1488 #endif
1489 pthread_mutex_init(&m, &attr);
1490 pthread_mutexattr_destroy(&attr);
1491 }
1492 ~B2_mutex() {
1493 pthread_mutex_trylock(&m); // Make sure it's locked before
1494 pthread_mutex_unlock(&m); // unlocking it.
1495 pthread_mutex_destroy(&m);
1496 }
1497 pthread_mutex_t m;
1498 };
1499
1500 B2_mutex *B2_create_mutex(void)
1501 {
1502 return new B2_mutex;
1503 }
1504
1505 void B2_lock_mutex(B2_mutex *mutex)
1506 {
1507 pthread_mutex_lock(&mutex->m);
1508 }
1509
1510 void B2_unlock_mutex(B2_mutex *mutex)
1511 {
1512 pthread_mutex_unlock(&mutex->m);
1513 }
1514
1515 void B2_delete_mutex(B2_mutex *mutex)
1516 {
1517 delete mutex;
1518 }
1519
1520 #else
1521
1522 struct B2_mutex {
1523 int dummy;
1524 };
1525
1526 B2_mutex *B2_create_mutex(void)
1527 {
1528 return new B2_mutex;
1529 }
1530
1531 void B2_lock_mutex(B2_mutex *mutex)
1532 {
1533 }
1534
1535 void B2_unlock_mutex(B2_mutex *mutex)
1536 {
1537 }
1538
1539 void B2_delete_mutex(B2_mutex *mutex)
1540 {
1541 delete mutex;
1542 }
1543
1544 #endif
1545
1546
1547 /*
1548 * Trigger signal USR2 from another thread
1549 */
1550
1551 #if !EMULATED_PPC
1552 void TriggerInterrupt(void)
1553 {
1554 if (ready_for_signals) {
1555 idle_resume();
1556 pthread_kill(emul_thread, SIGUSR2);
1557 }
1558 }
1559 #endif
1560
1561
1562 /*
1563 * Interrupt flags (must be handled atomically!)
1564 */
1565
1566 volatile uint32 InterruptFlags = 0;
1567
1568 void SetInterruptFlag(uint32 flag)
1569 {
1570 atomic_or((int *)&InterruptFlags, flag);
1571 }
1572
1573 void ClearInterruptFlag(uint32 flag)
1574 {
1575 atomic_and((int *)&InterruptFlags, ~flag);
1576 }
1577
1578
1579 /*
1580 * Disable interrupts
1581 */
1582
1583 void DisableInterrupt(void)
1584 {
1585 #if EMULATED_PPC
1586 WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1587 #else
1588 atomic_add((int *)XLM_IRQ_NEST, 1);
1589 #endif
1590 }
1591
1592
1593 /*
1594 * Enable interrupts
1595 */
1596
1597 void EnableInterrupt(void)
1598 {
1599 #if EMULATED_PPC
1600 WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1601 #else
1602 atomic_add((int *)XLM_IRQ_NEST, -1);
1603 #endif
1604 }
1605
1606
1607 /*
1608 * USR2 handler
1609 */
1610
1611 #if !EMULATED_PPC
1612 void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1613 {
1614 machine_regs *r = MACHINE_REGISTERS(scp);
1615
1616 #ifdef SYSTEM_CLOBBERS_R2
1617 // Restore pointer to Thread Local Storage
1618 set_r2(TOC);
1619 #endif
1620 #ifdef SYSTEM_CLOBBERS_R13
1621 // Restore pointer to .sdata section
1622 set_r13(R13);
1623 #endif
1624
1625 #ifdef USE_SDL_VIDEO
1626 // We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
1627 SDL_PumpEvents();
1628 #endif
1629
1630 // Do nothing if interrupts are disabled
1631 if (*(int32 *)XLM_IRQ_NEST > 0)
1632 return;
1633
1634 // Disable MacOS stack sniffer
1635 WriteMacInt32(0x110, 0);
1636
1637 // Interrupt action depends on current run mode
1638 switch (ReadMacInt32(XLM_RUN_MODE)) {
1639 case MODE_68K:
1640 // 68k emulator active, trigger 68k interrupt level 1
1641 WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1642 r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1643 break;
1644
1645 #if INTERRUPTS_IN_NATIVE_MODE
1646 case MODE_NATIVE:
1647 // 68k emulator inactive, in nanokernel?
1648 if (r->gpr(1) != KernelDataAddr) {
1649
1650 // Set extra stack for SIGSEGV handler
1651 sigaltstack(&extra_stack, NULL);
1652
1653 // Prepare for 68k interrupt level 1
1654 WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1655 WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1656
1657 // Execute nanokernel interrupt routine (this will activate the 68k emulator)
1658 DisableInterrupt();
1659 if (ROMType == ROMTYPE_NEWWORLD)
1660 ppc_interrupt(ROMBase + 0x312b1c, KernelDataAddr);
1661 else
1662 ppc_interrupt(ROMBase + 0x312a3c, KernelDataAddr);
1663
1664 // Reset normal stack
1665 sigaltstack(&sig_stack, NULL);
1666 }
1667 break;
1668 #endif
1669
1670 #if INTERRUPTS_IN_EMUL_OP_MODE
1671 case MODE_EMUL_OP:
1672 // 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0
1673 if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1674
1675 // Set extra stack for SIGSEGV handler
1676 sigaltstack(&extra_stack, NULL);
1677 #if 1
1678 // Execute full 68k interrupt routine
1679 M68kRegisters r;
1680 uint32 old_r25 = ReadMacInt32(XLM_68K_R25); // Save interrupt level
1681 WriteMacInt32(XLM_68K_R25, 0x21); // Execute with interrupt level 1
1682 static const uint16 proc[] = {
1683 0x3f3c, 0x0000, // move.w #$0000,-(sp) (fake format word)
1684 0x487a, 0x000a, // pea @1(pc) (return address)
1685 0x40e7, // move sr,-(sp) (saved SR)
1686 0x2078, 0x0064, // move.l $64,a0
1687 0x4ed0, // jmp (a0)
1688 M68K_RTS // @1
1689 };
1690 Execute68k((uint32)proc, &r);
1691 WriteMacInt32(XLM_68K_R25, old_r25); // Restore interrupt level
1692 #else
1693 // Only update cursor
1694 if (HasMacStarted()) {
1695 if (InterruptFlags & INTFLAG_VIA) {
1696 ClearInterruptFlag(INTFLAG_VIA);
1697 ADBInterrupt();
1698 ExecuteNative(NATIVE_VIDEO_VBL);
1699 }
1700 }
1701 #endif
1702 // Reset normal stack
1703 sigaltstack(&sig_stack, NULL);
1704 }
1705 break;
1706 #endif
1707 }
1708 }
1709 #endif
1710
1711
1712 /*
1713 * SIGSEGV handler
1714 */
1715
1716 #if !EMULATED_PPC
1717 static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1718 {
1719 machine_regs *r = MACHINE_REGISTERS(scp);
1720
1721 // Get effective address
1722 uint32 addr = r->dar();
1723
1724 #ifdef SYSTEM_CLOBBERS_R2
1725 // Restore pointer to Thread Local Storage
1726 set_r2(TOC);
1727 #endif
1728 #ifdef SYSTEM_CLOBBERS_R13
1729 // Restore pointer to .sdata section
1730 set_r13(R13);
1731 #endif
1732
1733 #if ENABLE_VOSF
1734 // Handle screen fault
1735 #if SIGSEGV_CHECK_VERSION(1,0,0)
1736 sigsegv_info_t si;
1737 si.addr = (sigsegv_address_t)addr;
1738 si.pc = (sigsegv_address_t)r->pc();
1739 #endif
1740 extern bool Screen_fault_handler(sigsegv_info_t *sip);
1741 if (Screen_fault_handler(&si))
1742 return;
1743 #endif
1744
1745 num_segv++;
1746
1747 // Fault in Mac ROM or RAM or DR Cache?
1748 bool mac_fault = (r->pc() >= ROMBase) && (r->pc() < (ROMBase + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)) || (r->pc() >= DR_CACHE_BASE && r->pc() < (DR_CACHE_BASE + DR_CACHE_SIZE));
1749 if (mac_fault) {
1750
1751 // "VM settings" during MacOS 8 installation
1752 if (r->pc() == ROMBase + 0x488160 && r->gpr(20) == 0xf8000000) {
1753 r->pc() += 4;
1754 r->gpr(8) = 0;
1755 return;
1756
1757 // MacOS 8.5 installation
1758 } else if (r->pc() == ROMBase + 0x488140 && r->gpr(16) == 0xf8000000) {
1759 r->pc() += 4;
1760 r->gpr(8) = 0;
1761 return;
1762
1763 // MacOS 8 serial drivers on startup
1764 } else if (r->pc() == ROMBase + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1765 r->pc() += 4;
1766 r->gpr(8) = 0;
1767 return;
1768
1769 // MacOS 8.1 serial drivers on startup
1770 } else if (r->pc() == ROMBase + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1771 r->pc() += 4;
1772 return;
1773 } else if (r->pc() == ROMBase + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1774 r->pc() += 4;
1775 return;
1776
1777 // MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1778 } else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1779 r->pc() += 4;
1780 return;
1781 } else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1782 r->pc() += 4;
1783 return;
1784 }
1785
1786 // Get opcode and divide into fields
1787 uint32 opcode = *((uint32 *)r->pc());
1788 uint32 primop = opcode >> 26;
1789 uint32 exop = (opcode >> 1) & 0x3ff;
1790 uint32 ra = (opcode >> 16) & 0x1f;
1791 uint32 rb = (opcode >> 11) & 0x1f;
1792 uint32 rd = (opcode >> 21) & 0x1f;
1793 int32 imm = (int16)(opcode & 0xffff);
1794
1795 // Analyze opcode
1796 enum {
1797 TYPE_UNKNOWN,
1798 TYPE_LOAD,
1799 TYPE_STORE
1800 } transfer_type = TYPE_UNKNOWN;
1801 enum {
1802 SIZE_UNKNOWN,
1803 SIZE_BYTE,
1804 SIZE_HALFWORD,
1805 SIZE_WORD
1806 } transfer_size = SIZE_UNKNOWN;
1807 enum {
1808 MODE_UNKNOWN,
1809 MODE_NORM,
1810 MODE_U,
1811 MODE_X,
1812 MODE_UX
1813 } addr_mode = MODE_UNKNOWN;
1814 switch (primop) {
1815 case 31:
1816 switch (exop) {
1817 case 23: // lwzx
1818 transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break;
1819 case 55: // lwzux
1820 transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break;
1821 case 87: // lbzx
1822 transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break;
1823 case 119: // lbzux
1824 transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break;
1825 case 151: // stwx
1826 transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break;
1827 case 183: // stwux
1828 transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break;
1829 case 215: // stbx
1830 transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break;
1831 case 247: // stbux
1832 transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break;
1833 case 279: // lhzx
1834 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break;
1835 case 311: // lhzux
1836 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break;
1837 case 343: // lhax
1838 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break;
1839 case 375: // lhaux
1840 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break;
1841 case 407: // sthx
1842 transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break;
1843 case 439: // sthux
1844 transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break;
1845 }
1846 break;
1847
1848 case 32: // lwz
1849 transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
1850 case 33: // lwzu
1851 transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
1852 case 34: // lbz
1853 transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break;
1854 case 35: // lbzu
1855 transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break;
1856 case 36: // stw
1857 transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
1858 case 37: // stwu
1859 transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
1860 case 38: // stb
1861 transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break;
1862 case 39: // stbu
1863 transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break;
1864 case 40: // lhz
1865 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1866 case 41: // lhzu
1867 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1868 case 42: // lha
1869 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1870 case 43: // lhau
1871 transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1872 case 44: // sth
1873 transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1874 case 45: // sthu
1875 transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1876 #if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1877 case 46: // lmw
1878 if ((addr % 4) != 0) {
1879 uint32 ea = addr;
1880 D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1881 for (int i = rd; i <= 31; i++) {
1882 r->gpr(i) = ReadMacInt32(ea);
1883 ea += 4;
1884 }
1885 r->pc() += 4;
1886 goto rti;
1887 }
1888 break;
1889 case 47: // stmw
1890 if ((addr % 4) != 0) {
1891 uint32 ea = addr;
1892 D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1893 for (int i = rd; i <= 31; i++) {
1894 WriteMacInt32(ea, r->gpr(i));
1895 ea += 4;
1896 }
1897 r->pc() += 4;
1898 goto rti;
1899 }
1900 break;
1901 #endif
1902 }
1903
1904 // Ignore ROM writes (including to the zero page, which is read-only)
1905 if (transfer_type == TYPE_STORE &&
1906 ((addr >= ROMBase && addr < ROMBase + ROM_SIZE) ||
1907 (addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1908 // 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->pc()));
1909 if (addr_mode == MODE_U || addr_mode == MODE_UX)
1910 r->gpr(ra) = addr;
1911 r->pc() += 4;
1912 goto rti;
1913 }
1914
1915 // Ignore illegal memory accesses?
1916 if (PrefsFindBool("ignoresegv")) {
1917 if (addr_mode == MODE_U || addr_mode == MODE_UX)
1918 r->gpr(ra) = addr;
1919 if (transfer_type == TYPE_LOAD)
1920 r->gpr(rd) = 0;
1921 r->pc() += 4;
1922 goto rti;
1923 }
1924
1925 // In GUI mode, show error alert
1926 if (!PrefsFindBool("nogui")) {
1927 char str[256];
1928 if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1929 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->pc(), r->gpr(24), r->gpr(1));
1930 else
1931 sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1932 ErrorAlert(str);
1933 QuitEmulator();
1934 return;
1935 }
1936 }
1937
1938 // For all other errors, jump into debugger (sort of...)
1939 crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1940 if (!ready_for_signals) {
1941 printf("%s\n");
1942 printf(" sigcontext %p, machine_regs %p\n", scp, r);
1943 printf(
1944 " pc %08lx lr %08lx ctr %08lx msr %08lx\n"
1945 " xer %08lx cr %08lx \n"
1946 " r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
1947 " r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n"
1948 " r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n"
1949 " r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n"
1950 " r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n"
1951 " r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
1952 " r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
1953 " r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
1954 crash_reason,
1955 r->pc(), r->lr(), r->ctr(), r->msr(),
1956 r->xer(), r->cr(),
1957 r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1958 r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1959 r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1960 r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1961 r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1962 r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1963 r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1964 r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1965 exit(1);
1966 QuitEmulator();
1967 return;
1968 } else {
1969 // We crashed. Save registers, tell tick thread and loop forever
1970 build_sigregs(&sigsegv_regs, r);
1971 emul_thread_fatal = true;
1972 for (;;) ;
1973 }
1974 rti:;
1975 }
1976
1977
1978 /*
1979 * SIGILL handler
1980 */
1981
1982 static void sigill_handler(int sig, siginfo_t *sip, void *scp)
1983 {
1984 machine_regs *r = MACHINE_REGISTERS(scp);
1985 char str[256];
1986
1987 #ifdef SYSTEM_CLOBBERS_R2
1988 // Restore pointer to Thread Local Storage
1989 set_r2(TOC);
1990 #endif
1991 #ifdef SYSTEM_CLOBBERS_R13
1992 // Restore pointer to .sdata section
1993 set_r13(R13);
1994 #endif
1995
1996 // Fault in Mac ROM or RAM?
1997 bool mac_fault = (r->pc() >= ROMBase) && (r->pc() < (ROMBase + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1998 if (mac_fault) {
1999
2000 // Get opcode and divide into fields
2001 uint32 opcode = *((uint32 *)r->pc());
2002 uint32 primop = opcode >> 26;
2003 uint32 exop = (opcode >> 1) & 0x3ff;
2004 uint32 ra = (opcode >> 16) & 0x1f;
2005 uint32 rb = (opcode >> 11) & 0x1f;
2006 uint32 rd = (opcode >> 21) & 0x1f;
2007 int32 imm = (int16)(opcode & 0xffff);
2008
2009 switch (primop) {
2010 case 9: // POWER instructions
2011 case 22:
2012 power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
2013 ErrorAlert(str);
2014 QuitEmulator();
2015 return;
2016
2017 case 31:
2018 switch (exop) {
2019 case 83: // mfmsr
2020 r->gpr(rd) = 0xf072;
2021 r->pc() += 4;
2022 goto rti;
2023
2024 case 210: // mtsr
2025 case 242: // mtsrin
2026 case 306: // tlbie
2027 r->pc() += 4;
2028 goto rti;
2029
2030 case 339: { // mfspr
2031 int spr = ra | (rb << 5);
2032 switch (spr) {
2033 case 0: // MQ
2034 case 22: // DEC
2035 case 952: // MMCR0
2036 case 953: // PMC1
2037 case 954: // PMC2
2038 case 955: // SIA
2039 case 956: // MMCR1
2040 case 957: // PMC3
2041 case 958: // PMC4
2042 case 959: // SDA
2043 r->pc() += 4;
2044 goto rti;
2045 case 25: // SDR1
2046 r->gpr(rd) = 0xdead001f;
2047 r->pc() += 4;
2048 goto rti;
2049 case 287: // PVR
2050 r->gpr(rd) = PVR;
2051 r->pc() += 4;
2052 goto rti;
2053 }
2054 break;
2055 }
2056
2057 case 467: { // mtspr
2058 int spr = ra | (rb << 5);
2059 switch (spr) {
2060 case 0: // MQ
2061 case 22: // DEC
2062 case 275: // SPRG3
2063 case 528: // IBAT0U
2064 case 529: // IBAT0L
2065 case 530: // IBAT1U
2066 case 531: // IBAT1L
2067 case 532: // IBAT2U
2068 case 533: // IBAT2L
2069 case 534: // IBAT3U
2070 case 535: // IBAT3L
2071 case 536: // DBAT0U
2072 case 537: // DBAT0L
2073 case 538: // DBAT1U
2074 case 539: // DBAT1L
2075 case 540: // DBAT2U
2076 case 541: // DBAT2L
2077 case 542: // DBAT3U
2078 case 543: // DBAT3L
2079 case 952: // MMCR0
2080 case 953: // PMC1
2081 case 954: // PMC2
2082 case 955: // SIA
2083 case 956: // MMCR1
2084 case 957: // PMC3
2085 case 958: // PMC4
2086 case 959: // SDA
2087 r->pc() += 4;
2088 goto rti;
2089 }
2090 break;
2091 }
2092
2093 case 29: case 107: case 152: case 153: // POWER instructions
2094 case 184: case 216: case 217: case 248:
2095 case 264: case 277: case 331: case 360:
2096 case 363: case 488: case 531: case 537:
2097 case 541: case 664: case 665: case 696:
2098 case 728: case 729: case 760: case 920:
2099 case 921: case 952:
2100 goto power_inst;
2101 }
2102 }
2103
2104 // In GUI mode, show error alert
2105 if (!PrefsFindBool("nogui")) {
2106 sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2107 ErrorAlert(str);
2108 QuitEmulator();
2109 return;
2110 }
2111 }
2112
2113 // For all other errors, jump into debugger (sort of...)
2114 crash_reason = "SIGILL";
2115 if (!ready_for_signals) {
2116 printf("%s\n");
2117 printf(" sigcontext %p, machine_regs %p\n", scp, r);
2118 printf(
2119 " pc %08lx lr %08lx ctr %08lx msr %08lx\n"
2120 " xer %08lx cr %08lx \n"
2121 " r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
2122 " r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n"
2123 " r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n"
2124 " r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n"
2125 " r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n"
2126 " r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
2127 " r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
2128 " r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
2129 crash_reason,
2130 r->pc(), r->lr(), r->ctr(), r->msr(),
2131 r->xer(), r->cr(),
2132 r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2133 r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2134 r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2135 r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2136 r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2137 r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2138 r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2139 r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2140 exit(1);
2141 QuitEmulator();
2142 return;
2143 } else {
2144 // We crashed. Save registers, tell tick thread and loop forever
2145 build_sigregs(&sigsegv_regs, r);
2146 emul_thread_fatal = true;
2147 for (;;) ;
2148 }
2149 rti:;
2150 }
2151 #endif
2152
2153
2154 /*
2155 * Helpers to share 32-bit addressable data with MacOS
2156 */
2157
2158 bool SheepMem::Init(void)
2159 {
2160 // Size of a native page
2161 page_size = getpagesize();
2162
2163 // Allocate SheepShaver globals
2164 proc = base;
2165 if (vm_mac_acquire_fixed(base, size) < 0)
2166 return false;
2167
2168 // Allocate page with all bits set to 0, right in the middle
2169 // This is also used to catch undesired overlaps between proc and data areas
2170 zero_page = proc + (size / 2);
2171 Mac_memset(zero_page, 0, page_size);
2172 if (vm_protect(Mac2HostAddr(zero_page), page_size, VM_PAGE_READ) < 0)
2173 return false;
2174
2175 #if EMULATED_PPC
2176 // Allocate alternate stack for PowerPC interrupt routine
2177 sig_stack = base + size;
2178 if (vm_mac_acquire_fixed(sig_stack, SIG_STACK_SIZE) < 0)
2179 return false;
2180 #endif
2181
2182 data = base + size;
2183 return true;
2184 }
2185
2186 void SheepMem::Exit(void)
2187 {
2188 if (data) {
2189 // Delete SheepShaver globals
2190 vm_mac_release(base, size);
2191
2192 #if EMULATED_PPC
2193 // Delete alternate stack for PowerPC interrupt routine
2194 vm_mac_release(sig_stack, SIG_STACK_SIZE);
2195 #endif
2196 }
2197 }
2198
2199
2200 /*
2201 * Display alert
2202 */
2203
2204 #ifdef ENABLE_GTK
2205 static void dl_destroyed(void)
2206 {
2207 gtk_main_quit();
2208 }
2209
2210 static void dl_quit(GtkWidget *dialog)
2211 {
2212 gtk_widget_destroy(dialog);
2213 }
2214
2215 void display_alert(int title_id, int prefix_id, int button_id, const char *text)
2216 {
2217 char str[256];
2218 sprintf(str, GetString(prefix_id), text);
2219
2220 GtkWidget *dialog = gtk_dialog_new();
2221 gtk_window_set_title(GTK_WINDOW(dialog), GetString(title_id));
2222 gtk_container_border_width(GTK_CONTAINER(dialog), 5);
2223 gtk_widget_set_uposition(GTK_WIDGET(dialog), 100, 150);
2224 gtk_signal_connect(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(dl_destroyed), NULL);
2225
2226 GtkWidget *label = gtk_label_new(str);
2227 gtk_widget_show(label);
2228 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), label, TRUE, TRUE, 0);
2229
2230 GtkWidget *button = gtk_button_new_with_label(GetString(button_id));
2231 gtk_widget_show(button);
2232 gtk_signal_connect_object(GTK_OBJECT(button), "clicked", GTK_SIGNAL_FUNC(dl_quit), GTK_OBJECT(dialog));
2233 gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, FALSE, FALSE, 0);
2234 GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
2235 gtk_widget_grab_default(button);
2236 gtk_widget_show(dialog);
2237
2238 gtk_main();
2239 }
2240 #endif
2241
2242
2243 /*
2244 * Display error alert
2245 */
2246
2247 void ErrorAlert(const char *text)
2248 {
2249 if (gui_connection) {
2250 if (rpc_method_invoke(gui_connection, RPC_METHOD_ERROR_ALERT, RPC_TYPE_STRING, text, RPC_TYPE_INVALID) == RPC_ERROR_NO_ERROR &&
2251 rpc_method_wait_for_reply(gui_connection, RPC_TYPE_INVALID) == RPC_ERROR_NO_ERROR)
2252 return;
2253 }
2254 #if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2255 if (PrefsFindBool("nogui") || x_display == NULL) {
2256 printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2257 return;
2258 }
2259 VideoQuitFullScreen();
2260 display_alert(STR_ERROR_ALERT_TITLE, STR_GUI_ERROR_PREFIX, STR_QUIT_BUTTON, text);
2261 #else
2262 printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2263 #endif
2264 }
2265
2266
2267 /*
2268 * Display warning alert
2269 */
2270
2271 void WarningAlert(const char *text)
2272 {
2273 if (gui_connection) {
2274 if (rpc_method_invoke(gui_connection, RPC_METHOD_WARNING_ALERT, RPC_TYPE_STRING, text, RPC_TYPE_INVALID) == RPC_ERROR_NO_ERROR &&
2275 rpc_method_wait_for_reply(gui_connection, RPC_TYPE_INVALID) == RPC_ERROR_NO_ERROR)
2276 return;
2277 }
2278 #if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2279 if (PrefsFindBool("nogui") || x_display == NULL) {
2280 printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2281 return;
2282 }
2283 display_alert(STR_WARNING_ALERT_TITLE, STR_GUI_WARNING_PREFIX, STR_OK_BUTTON, text);
2284 #else
2285 printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2286 #endif
2287 }
2288
2289
2290 /*
2291 * Display choice alert
2292 */
2293
2294 bool ChoiceAlert(const char *text, const char *pos, const char *neg)
2295 {
2296 printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2297 return false; //!!
2298 }