1 |
/* |
2 |
* main_unix.cpp - Emulation core, Unix implementation |
3 |
* |
4 |
* SheepShaver (C) 1997-2004 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 |
#include "vm_alloc.h" |
111 |
#include "sigsegv.h" |
112 |
#include "thunks.h" |
113 |
|
114 |
#define DEBUG 0 |
115 |
#include "debug.h" |
116 |
|
117 |
|
118 |
#include <X11/Xlib.h> |
119 |
|
120 |
#ifdef ENABLE_GTK |
121 |
#include <gtk/gtk.h> |
122 |
#endif |
123 |
|
124 |
#ifdef ENABLE_XF86_DGA |
125 |
#include <X11/Xlib.h> |
126 |
#include <X11/Xutil.h> |
127 |
#include <X11/extensions/xf86dga.h> |
128 |
#endif |
129 |
|
130 |
#ifdef ENABLE_MON |
131 |
#include "mon.h" |
132 |
#endif |
133 |
|
134 |
|
135 |
// Enable emulation of unaligned lmw/stmw? |
136 |
#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1 |
137 |
|
138 |
// Enable Execute68k() safety checks? |
139 |
#define SAFE_EXEC_68K 0 |
140 |
|
141 |
// Interrupts in EMUL_OP mode? |
142 |
#define INTERRUPTS_IN_EMUL_OP_MODE 1 |
143 |
|
144 |
// Interrupts in native mode? |
145 |
#define INTERRUPTS_IN_NATIVE_MODE 1 |
146 |
|
147 |
|
148 |
// Constants |
149 |
const char ROM_FILE_NAME[] = "ROM"; |
150 |
const char ROM_FILE_NAME2[] = "Mac OS ROM"; |
151 |
|
152 |
const uintptr RAM_BASE = 0x20000000; // Base address of RAM |
153 |
const uint32 SIG_STACK_SIZE = 0x10000; // Size of signal stack |
154 |
|
155 |
|
156 |
#if !EMULATED_PPC |
157 |
struct sigregs { |
158 |
uint32 nip; |
159 |
uint32 link; |
160 |
uint32 ctr; |
161 |
uint32 msr; |
162 |
uint32 xer; |
163 |
uint32 ccr; |
164 |
uint32 gpr[32]; |
165 |
}; |
166 |
|
167 |
#if defined(__linux__) |
168 |
#include <sys/ucontext.h> |
169 |
#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs)) |
170 |
|
171 |
struct machine_regs : public pt_regs |
172 |
{ |
173 |
u_long & cr() { return pt_regs::ccr; } |
174 |
uint32 cr() const { return pt_regs::ccr; } |
175 |
uint32 lr() const { return pt_regs::link; } |
176 |
uint32 ctr() const { return pt_regs::ctr; } |
177 |
uint32 xer() const { return pt_regs::xer; } |
178 |
uint32 msr() const { return pt_regs::msr; } |
179 |
uint32 dar() const { return pt_regs::dar; } |
180 |
u_long & pc() { return pt_regs::nip; } |
181 |
uint32 pc() const { return pt_regs::nip; } |
182 |
u_long & gpr(int i) { return pt_regs::gpr[i]; } |
183 |
uint32 gpr(int i) const { return pt_regs::gpr[i]; } |
184 |
}; |
185 |
#endif |
186 |
|
187 |
#if defined(__APPLE__) && defined(__MACH__) |
188 |
#include <sys/signal.h> |
189 |
extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss); |
190 |
|
191 |
#include <sys/ucontext.h> |
192 |
#define MACHINE_REGISTERS(scp) ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext)) |
193 |
|
194 |
struct machine_regs : public mcontext |
195 |
{ |
196 |
uint32 & cr() { return ss.cr; } |
197 |
uint32 cr() const { return ss.cr; } |
198 |
uint32 lr() const { return ss.lr; } |
199 |
uint32 ctr() const { return ss.ctr; } |
200 |
uint32 xer() const { return ss.xer; } |
201 |
uint32 msr() const { return ss.srr1; } |
202 |
uint32 dar() const { return es.dar; } |
203 |
uint32 & pc() { return ss.srr0; } |
204 |
uint32 pc() const { return ss.srr0; } |
205 |
uint32 & gpr(int i) { return (&ss.r0)[i]; } |
206 |
uint32 gpr(int i) const { return (&ss.r0)[i]; } |
207 |
}; |
208 |
#endif |
209 |
|
210 |
static void build_sigregs(sigregs *srp, machine_regs *mrp) |
211 |
{ |
212 |
srp->nip = mrp->pc(); |
213 |
srp->link = mrp->lr(); |
214 |
srp->ctr = mrp->ctr(); |
215 |
srp->msr = mrp->msr(); |
216 |
srp->xer = mrp->xer(); |
217 |
srp->ccr = mrp->cr(); |
218 |
for (int i = 0; i < 32; i++) |
219 |
srp->gpr[i] = mrp->gpr(i); |
220 |
} |
221 |
#endif |
222 |
|
223 |
|
224 |
// Global variables (exported) |
225 |
#if !EMULATED_PPC |
226 |
void *TOC; // Small data pointer (r13) |
227 |
#endif |
228 |
uint32 RAMBase; // Base address of Mac RAM |
229 |
uint32 RAMSize; // Size of Mac RAM |
230 |
uint32 KernelDataAddr; // Address of Kernel Data |
231 |
uint32 BootGlobsAddr; // Address of BootGlobs structure at top of Mac RAM |
232 |
uint32 PVR; // Theoretical PVR |
233 |
int64 CPUClockSpeed; // Processor clock speed (Hz) |
234 |
int64 BusClockSpeed; // Bus clock speed (Hz) |
235 |
|
236 |
|
237 |
// Global variables |
238 |
char *x_display_name = NULL; // X11 display name |
239 |
Display *x_display = NULL; // X11 display handle |
240 |
#ifdef X11_LOCK_TYPE |
241 |
X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock |
242 |
#endif |
243 |
|
244 |
static int zero_fd = 0; // FD of /dev/zero |
245 |
static bool lm_area_mapped = false; // Flag: Low Memory area mmap()ped |
246 |
static int kernel_area = -1; // SHM ID of Kernel Data area |
247 |
static bool rom_area_mapped = false; // Flag: Mac ROM mmap()ped |
248 |
static bool ram_area_mapped = false; // Flag: Mac RAM mmap()ped |
249 |
static KernelData *kernel_data; // Pointer to Kernel Data |
250 |
static EmulatorData *emulator_data; |
251 |
|
252 |
static uint8 last_xpram[XPRAM_SIZE]; // Buffer for monitoring XPRAM changes |
253 |
|
254 |
static bool nvram_thread_active = false; // Flag: NVRAM watchdog installed |
255 |
static pthread_t nvram_thread; // NVRAM watchdog |
256 |
static bool tick_thread_active = false; // Flag: MacOS thread installed |
257 |
static pthread_t tick_thread; // 60Hz thread |
258 |
static pthread_t emul_thread; // MacOS thread |
259 |
|
260 |
static bool ready_for_signals = false; // Handler installed, signals can be sent |
261 |
static int64 num_segv = 0; // Number of handled SEGV signals |
262 |
|
263 |
static struct sigaction sigusr2_action; // Interrupt signal (of emulator thread) |
264 |
#if EMULATED_PPC |
265 |
static uintptr sig_stack = 0; // Stack for PowerPC interrupt routine |
266 |
#else |
267 |
static struct sigaction sigsegv_action; // Data access exception signal (of emulator thread) |
268 |
static struct sigaction sigill_action; // Illegal instruction signal (of emulator thread) |
269 |
static void *sig_stack = NULL; // Stack for signal handlers |
270 |
static void *extra_stack = NULL; // Stack for SIGSEGV inside interrupt handler |
271 |
static bool emul_thread_fatal = false; // Flag: MacOS thread crashed, tick thread shall dump debug output |
272 |
static sigregs sigsegv_regs; // Register dump when crashed |
273 |
static const char *crash_reason = NULL; // Reason of the crash (SIGSEGV, SIGBUS, SIGILL) |
274 |
#endif |
275 |
|
276 |
uint32 SheepMem::page_size; // Size of a native page |
277 |
uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros |
278 |
uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data |
279 |
uintptr SheepMem::top = 0; // Top of SheepShaver data (stack like storage) |
280 |
|
281 |
|
282 |
// Prototypes |
283 |
static void Quit(void); |
284 |
static void *emul_func(void *arg); |
285 |
static void *nvram_func(void *arg); |
286 |
static void *tick_func(void *arg); |
287 |
#if EMULATED_PPC |
288 |
static void sigusr2_handler(int sig); |
289 |
extern void emul_ppc(uint32 start); |
290 |
extern void init_emul_ppc(void); |
291 |
extern void exit_emul_ppc(void); |
292 |
#else |
293 |
static void sigusr2_handler(int sig, siginfo_t *sip, void *scp); |
294 |
static void sigsegv_handler(int sig, siginfo_t *sip, void *scp); |
295 |
static void sigill_handler(int sig, siginfo_t *sip, void *scp); |
296 |
#endif |
297 |
|
298 |
|
299 |
// From asm_linux.S |
300 |
#if !EMULATED_PPC |
301 |
extern "C" void *get_toc(void); |
302 |
extern "C" void *get_sp(void); |
303 |
extern "C" void flush_icache_range(void *start, void *end); |
304 |
extern "C" void jump_to_rom(uint32 entry, uint32 context); |
305 |
extern "C" void quit_emulator(void); |
306 |
extern "C" void execute_68k(uint32 pc, M68kRegisters *r); |
307 |
extern "C" void ppc_interrupt(uint32 entry, uint32 kernel_data); |
308 |
extern "C" int atomic_add(int *var, int v); |
309 |
extern "C" int atomic_and(int *var, int v); |
310 |
extern "C" int atomic_or(int *var, int v); |
311 |
extern void paranoia_check(void); |
312 |
#endif |
313 |
|
314 |
|
315 |
#if EMULATED_PPC |
316 |
/* |
317 |
* Return signal stack base |
318 |
*/ |
319 |
|
320 |
uintptr SignalStackBase(void) |
321 |
{ |
322 |
return sig_stack + SIG_STACK_SIZE; |
323 |
} |
324 |
|
325 |
|
326 |
/* |
327 |
* Atomic operations |
328 |
*/ |
329 |
|
330 |
#if HAVE_SPINLOCKS |
331 |
static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED; |
332 |
#else |
333 |
#define spin_lock(LOCK) |
334 |
#define spin_unlock(LOCK) |
335 |
#endif |
336 |
|
337 |
int atomic_add(int *var, int v) |
338 |
{ |
339 |
spin_lock(&atomic_ops_lock); |
340 |
int ret = *var; |
341 |
*var += v; |
342 |
spin_unlock(&atomic_ops_lock); |
343 |
return ret; |
344 |
} |
345 |
|
346 |
int atomic_and(int *var, int v) |
347 |
{ |
348 |
spin_lock(&atomic_ops_lock); |
349 |
int ret = *var; |
350 |
*var &= v; |
351 |
spin_unlock(&atomic_ops_lock); |
352 |
return ret; |
353 |
} |
354 |
|
355 |
int atomic_or(int *var, int v) |
356 |
{ |
357 |
spin_lock(&atomic_ops_lock); |
358 |
int ret = *var; |
359 |
*var |= v; |
360 |
spin_unlock(&atomic_ops_lock); |
361 |
return ret; |
362 |
} |
363 |
#endif |
364 |
|
365 |
|
366 |
/* |
367 |
* Main program |
368 |
*/ |
369 |
|
370 |
static void usage(const char *prg_name) |
371 |
{ |
372 |
printf("Usage: %s [OPTION...]\n", prg_name); |
373 |
printf("\nUnix options:\n"); |
374 |
printf(" --display STRING\n X display to use\n"); |
375 |
PrefsPrintUsage(); |
376 |
exit(0); |
377 |
} |
378 |
|
379 |
int main(int argc, char **argv) |
380 |
{ |
381 |
char str[256]; |
382 |
uint32 *boot_globs; |
383 |
int16 i16; |
384 |
int rom_fd; |
385 |
FILE *proc_file; |
386 |
const char *rom_path; |
387 |
uint32 rom_size, actual; |
388 |
uint8 *rom_tmp; |
389 |
time_t now, expire; |
390 |
|
391 |
// Initialize variables |
392 |
RAMBase = 0; |
393 |
tzset(); |
394 |
|
395 |
// Print some info |
396 |
printf(GetString(STR_ABOUT_TEXT1), VERSION_MAJOR, VERSION_MINOR); |
397 |
printf(" %s\n", GetString(STR_ABOUT_TEXT2)); |
398 |
|
399 |
#if !EMULATED_PPC |
400 |
// Get TOC pointer |
401 |
TOC = get_toc(); |
402 |
#endif |
403 |
|
404 |
#ifdef ENABLE_GTK |
405 |
// Init GTK |
406 |
gtk_set_locale(); |
407 |
gtk_init(&argc, &argv); |
408 |
#endif |
409 |
|
410 |
// Read preferences |
411 |
PrefsInit(argc, argv); |
412 |
|
413 |
// Parse command line arguments |
414 |
for (int i=1; i<argc; i++) { |
415 |
if (strcmp(argv[i], "--help") == 0) { |
416 |
usage(argv[0]); |
417 |
} else if (strcmp(argv[i], "--display") == 0) { |
418 |
i++; |
419 |
if (i < argc) |
420 |
x_display_name = strdup(argv[i]); |
421 |
} else if (argv[i][0] == '-') { |
422 |
fprintf(stderr, "Unrecognized option '%s'\n", argv[i]); |
423 |
usage(argv[0]); |
424 |
} |
425 |
} |
426 |
|
427 |
// Open display |
428 |
x_display = XOpenDisplay(x_display_name); |
429 |
if (x_display == NULL) { |
430 |
char str[256]; |
431 |
sprintf(str, GetString(STR_NO_XSERVER_ERR), XDisplayName(x_display_name)); |
432 |
ErrorAlert(str); |
433 |
goto quit; |
434 |
} |
435 |
|
436 |
#if defined(ENABLE_XF86_DGA) && !defined(ENABLE_MON) |
437 |
// Fork out, so we can return from fullscreen mode when things get ugly |
438 |
XF86DGAForkApp(DefaultScreen(x_display)); |
439 |
#endif |
440 |
|
441 |
#ifdef ENABLE_MON |
442 |
// Initialize mon |
443 |
mon_init(); |
444 |
#endif |
445 |
|
446 |
// Get system info |
447 |
PVR = 0x00040000; // Default: 604 |
448 |
CPUClockSpeed = 100000000; // Default: 100MHz |
449 |
BusClockSpeed = 100000000; // Default: 100MHz |
450 |
#if EMULATED_PPC |
451 |
PVR = 0x000c0000; // Default: 7400 (with AltiVec) |
452 |
#else |
453 |
proc_file = fopen("/proc/cpuinfo", "r"); |
454 |
if (proc_file) { |
455 |
char line[256]; |
456 |
while(fgets(line, 255, proc_file)) { |
457 |
// Read line |
458 |
int len = strlen(line); |
459 |
if (len == 0) |
460 |
continue; |
461 |
line[len-1] = 0; |
462 |
|
463 |
// Parse line |
464 |
int i; |
465 |
char value[256]; |
466 |
if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) { |
467 |
if (strcmp(value, "601") == 0) |
468 |
PVR = 0x00010000; |
469 |
else if (strcmp(value, "603") == 0) |
470 |
PVR = 0x00030000; |
471 |
else if (strcmp(value, "604") == 0) |
472 |
PVR = 0x00040000; |
473 |
else if (strcmp(value, "603e") == 0) |
474 |
PVR = 0x00060000; |
475 |
else if (strcmp(value, "603ev") == 0) |
476 |
PVR = 0x00070000; |
477 |
else if (strcmp(value, "604e") == 0) |
478 |
PVR = 0x00090000; |
479 |
else if (strcmp(value, "604ev5") == 0) |
480 |
PVR = 0x000a0000; |
481 |
else if (strcmp(value, "750") == 0) |
482 |
PVR = 0x00080000; |
483 |
else if (strcmp(value, "821") == 0) |
484 |
PVR = 0x00320000; |
485 |
else if (strcmp(value, "860") == 0) |
486 |
PVR = 0x00500000; |
487 |
else if (strcmp(value, "7400") == 0) |
488 |
PVR = 0x000c0000; |
489 |
else if (strcmp(value, "7410") == 0) |
490 |
PVR = 0x800c0000; |
491 |
else |
492 |
printf("WARNING: Unknown CPU type '%s', assuming 604\n", value); |
493 |
} |
494 |
if (sscanf(line, "clock : %dMHz", &i) == 1) |
495 |
CPUClockSpeed = BusClockSpeed = i * 1000000; |
496 |
} |
497 |
fclose(proc_file); |
498 |
} else { |
499 |
sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno)); |
500 |
WarningAlert(str); |
501 |
} |
502 |
#endif |
503 |
D(bug("PVR: %08x (assumed)\n", PVR)); |
504 |
|
505 |
// Init system routines |
506 |
SysInit(); |
507 |
|
508 |
// Show preferences editor |
509 |
if (!PrefsFindBool("nogui")) |
510 |
if (!PrefsEditor()) |
511 |
goto quit; |
512 |
|
513 |
#if !EMULATED_PPC |
514 |
// Check some things |
515 |
paranoia_check(); |
516 |
#endif |
517 |
|
518 |
// Open /dev/zero |
519 |
zero_fd = open("/dev/zero", O_RDWR); |
520 |
if (zero_fd < 0) { |
521 |
sprintf(str, GetString(STR_NO_DEV_ZERO_ERR), strerror(errno)); |
522 |
ErrorAlert(str); |
523 |
goto quit; |
524 |
} |
525 |
|
526 |
#ifndef PAGEZERO_HACK |
527 |
// Create Low Memory area (0x0000..0x3000) |
528 |
if (vm_acquire_fixed((char *)0, 0x3000) < 0) { |
529 |
sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno)); |
530 |
ErrorAlert(str); |
531 |
goto quit; |
532 |
} |
533 |
lm_area_mapped = true; |
534 |
#endif |
535 |
|
536 |
// Create areas for Kernel Data |
537 |
kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600); |
538 |
if (kernel_area == -1) { |
539 |
sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno)); |
540 |
ErrorAlert(str); |
541 |
goto quit; |
542 |
} |
543 |
if (shmat(kernel_area, (void *)KERNEL_DATA_BASE, 0) < 0) { |
544 |
sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno)); |
545 |
ErrorAlert(str); |
546 |
goto quit; |
547 |
} |
548 |
if (shmat(kernel_area, (void *)KERNEL_DATA2_BASE, 0) < 0) { |
549 |
sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno)); |
550 |
ErrorAlert(str); |
551 |
goto quit; |
552 |
} |
553 |
kernel_data = (KernelData *)KERNEL_DATA_BASE; |
554 |
emulator_data = &kernel_data->ed; |
555 |
KernelDataAddr = KERNEL_DATA_BASE; |
556 |
D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data)); |
557 |
|
558 |
// Create area for SheepShaver data |
559 |
if (!SheepMem::Init()) { |
560 |
sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno)); |
561 |
ErrorAlert(str); |
562 |
goto quit; |
563 |
} |
564 |
|
565 |
// Create area for Mac ROM |
566 |
if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) { |
567 |
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno)); |
568 |
ErrorAlert(str); |
569 |
goto quit; |
570 |
} |
571 |
#if !EMULATED_PPC |
572 |
if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) { |
573 |
sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno)); |
574 |
ErrorAlert(str); |
575 |
goto quit; |
576 |
} |
577 |
#endif |
578 |
rom_area_mapped = true; |
579 |
D(bug("ROM area at %08x\n", ROM_BASE)); |
580 |
|
581 |
// Create area for Mac RAM |
582 |
RAMSize = PrefsFindInt32("ramsize"); |
583 |
if (RAMSize < 8*1024*1024) { |
584 |
WarningAlert(GetString(STR_SMALL_RAM_WARN)); |
585 |
RAMSize = 8*1024*1024; |
586 |
} |
587 |
|
588 |
if (vm_acquire_fixed((char *)RAM_BASE, RAMSize) < 0) { |
589 |
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno)); |
590 |
ErrorAlert(str); |
591 |
goto quit; |
592 |
} |
593 |
#if !EMULATED_PPC |
594 |
if (vm_protect((char *)RAM_BASE, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) { |
595 |
sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno)); |
596 |
ErrorAlert(str); |
597 |
goto quit; |
598 |
} |
599 |
#endif |
600 |
RAMBase = RAM_BASE; |
601 |
ram_area_mapped = true; |
602 |
D(bug("RAM area at %08x\n", RAMBase)); |
603 |
|
604 |
if (RAMBase > ROM_BASE) { |
605 |
ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR)); |
606 |
goto quit; |
607 |
} |
608 |
|
609 |
// Load Mac ROM |
610 |
rom_path = PrefsFindString("rom"); |
611 |
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME, O_RDONLY); |
612 |
if (rom_fd < 0) { |
613 |
rom_fd = open(rom_path ? rom_path : ROM_FILE_NAME2, O_RDONLY); |
614 |
if (rom_fd < 0) { |
615 |
ErrorAlert(GetString(STR_NO_ROM_FILE_ERR)); |
616 |
goto quit; |
617 |
} |
618 |
} |
619 |
printf(GetString(STR_READING_ROM_FILE)); |
620 |
rom_size = lseek(rom_fd, 0, SEEK_END); |
621 |
lseek(rom_fd, 0, SEEK_SET); |
622 |
rom_tmp = new uint8[ROM_SIZE]; |
623 |
actual = read(rom_fd, (void *)rom_tmp, ROM_SIZE); |
624 |
close(rom_fd); |
625 |
|
626 |
// Decode Mac ROM |
627 |
if (!DecodeROM(rom_tmp, actual)) { |
628 |
if (rom_size != 4*1024*1024) { |
629 |
ErrorAlert(GetString(STR_ROM_SIZE_ERR)); |
630 |
goto quit; |
631 |
} else { |
632 |
ErrorAlert(GetString(STR_ROM_FILE_READ_ERR)); |
633 |
goto quit; |
634 |
} |
635 |
} |
636 |
delete[] rom_tmp; |
637 |
|
638 |
// Load NVRAM |
639 |
XPRAMInit(); |
640 |
|
641 |
// Set boot volume |
642 |
i16 = PrefsFindInt32("bootdrive"); |
643 |
XPRAM[0x1378] = i16 >> 8; |
644 |
XPRAM[0x1379] = i16 & 0xff; |
645 |
i16 = PrefsFindInt32("bootdriver"); |
646 |
XPRAM[0x137a] = i16 >> 8; |
647 |
XPRAM[0x137b] = i16 & 0xff; |
648 |
|
649 |
// Create BootGlobs at top of Mac memory |
650 |
memset((void *)(RAMBase + RAMSize - 4096), 0, 4096); |
651 |
BootGlobsAddr = RAMBase + RAMSize - 0x1c; |
652 |
boot_globs = (uint32 *)BootGlobsAddr; |
653 |
boot_globs[-5] = htonl(RAMBase + RAMSize); // MemTop |
654 |
boot_globs[0] = htonl(RAMBase); // First RAM bank |
655 |
boot_globs[1] = htonl(RAMSize); |
656 |
boot_globs[2] = htonl((uint32)-1); // End of bank table |
657 |
|
658 |
// Init thunks |
659 |
if (!ThunksInit()) |
660 |
goto quit; |
661 |
|
662 |
// Init drivers |
663 |
SonyInit(); |
664 |
DiskInit(); |
665 |
CDROMInit(); |
666 |
SCSIInit(); |
667 |
|
668 |
// Init external file system |
669 |
ExtFSInit(); |
670 |
|
671 |
// Init ADB |
672 |
ADBInit(); |
673 |
|
674 |
// Init audio |
675 |
AudioInit(); |
676 |
|
677 |
// Init network |
678 |
EtherInit(); |
679 |
|
680 |
// Init serial ports |
681 |
SerialInit(); |
682 |
|
683 |
// Init Time Manager |
684 |
TimerInit(); |
685 |
|
686 |
// Init clipboard |
687 |
ClipInit(); |
688 |
|
689 |
// Init video |
690 |
if (!VideoInit()) |
691 |
goto quit; |
692 |
|
693 |
// Install ROM patches |
694 |
if (!PatchROM()) { |
695 |
ErrorAlert(GetString(STR_UNSUPPORTED_ROM_TYPE_ERR)); |
696 |
goto quit; |
697 |
} |
698 |
|
699 |
// Clear caches (as we loaded and patched code) and write protect ROM |
700 |
#if !EMULATED_PPC |
701 |
MakeExecutable(0, (void *)ROM_BASE, ROM_AREA_SIZE); |
702 |
#endif |
703 |
vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE); |
704 |
|
705 |
// Initialize Kernel Data |
706 |
memset(kernel_data, 0, sizeof(KernelData)); |
707 |
if (ROMType == ROMTYPE_NEWWORLD) { |
708 |
uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32)); |
709 |
memset((void *)of_dev_tree, 0, 4 * sizeof(uint32)); |
710 |
uintptr vector_lookup_tbl = SheepMem::Reserve(128); |
711 |
uintptr vector_mask_tbl = SheepMem::Reserve(64); |
712 |
memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80); |
713 |
memset((void *)vector_lookup_tbl, 0, 128); |
714 |
memset((void *)vector_mask_tbl, 0, 64); |
715 |
kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE); |
716 |
kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree); // OF device tree base |
717 |
kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl); |
718 |
kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl); |
719 |
kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE); // OpenPIC base |
720 |
kernel_data->v[0xbb0 >> 2] = htonl(0); // ADB base |
721 |
kernel_data->v[0xc20 >> 2] = htonl(RAMSize); |
722 |
kernel_data->v[0xc24 >> 2] = htonl(RAMSize); |
723 |
kernel_data->v[0xc30 >> 2] = htonl(RAMSize); |
724 |
kernel_data->v[0xc34 >> 2] = htonl(RAMSize); |
725 |
kernel_data->v[0xc38 >> 2] = htonl(0x00010020); |
726 |
kernel_data->v[0xc3c >> 2] = htonl(0x00200001); |
727 |
kernel_data->v[0xc40 >> 2] = htonl(0x00010000); |
728 |
kernel_data->v[0xc50 >> 2] = htonl(RAMBase); |
729 |
kernel_data->v[0xc54 >> 2] = htonl(RAMSize); |
730 |
kernel_data->v[0xf60 >> 2] = htonl(PVR); |
731 |
kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed); |
732 |
kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed); |
733 |
kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed); |
734 |
} else { |
735 |
kernel_data->v[0xc80 >> 2] = htonl(RAMSize); |
736 |
kernel_data->v[0xc84 >> 2] = htonl(RAMSize); |
737 |
kernel_data->v[0xc90 >> 2] = htonl(RAMSize); |
738 |
kernel_data->v[0xc94 >> 2] = htonl(RAMSize); |
739 |
kernel_data->v[0xc98 >> 2] = htonl(0x00010020); |
740 |
kernel_data->v[0xc9c >> 2] = htonl(0x00200001); |
741 |
kernel_data->v[0xca0 >> 2] = htonl(0x00010000); |
742 |
kernel_data->v[0xcb0 >> 2] = htonl(RAMBase); |
743 |
kernel_data->v[0xcb4 >> 2] = htonl(RAMSize); |
744 |
kernel_data->v[0xf80 >> 2] = htonl(PVR); |
745 |
kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed); |
746 |
kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed); |
747 |
kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed); |
748 |
} |
749 |
|
750 |
// Initialize extra low memory |
751 |
D(bug("Initializing Low Memory...\n")); |
752 |
memset(NULL, 0, 0x3000); |
753 |
WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h')); // Signature to detect SheepShaver |
754 |
WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr); // For trap replacement routines |
755 |
WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR |
756 |
WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch |
757 |
WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode) |
758 |
WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage()); // Pointer to read-only page with all bits set to 0 |
759 |
#if !EMULATED_PPC |
760 |
WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator |
761 |
#endif |
762 |
WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT)); // DLPI ethernet driver functions |
763 |
WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM)); |
764 |
WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN)); |
765 |
WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE)); |
766 |
WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT)); |
767 |
WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV)); |
768 |
WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO)); |
769 |
D(bug("Low Memory initialized\n")); |
770 |
|
771 |
// Start 60Hz thread |
772 |
tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0); |
773 |
D(bug("Tick thread installed (%ld)\n", tick_thread)); |
774 |
|
775 |
// Start NVRAM watchdog thread |
776 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
777 |
nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0); |
778 |
D(bug("NVRAM thread installed (%ld)\n", nvram_thread)); |
779 |
|
780 |
#if !EMULATED_PPC |
781 |
// Create and install stacks for signal handlers |
782 |
sig_stack = malloc(SIG_STACK_SIZE); |
783 |
D(bug("Signal stack at %p\n", sig_stack)); |
784 |
if (sig_stack == NULL) { |
785 |
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR)); |
786 |
goto quit; |
787 |
} |
788 |
extra_stack = malloc(SIG_STACK_SIZE); |
789 |
D(bug("Extra stack at %p\n", extra_stack)); |
790 |
if (extra_stack == NULL) { |
791 |
ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR)); |
792 |
goto quit; |
793 |
} |
794 |
struct sigaltstack new_stack; |
795 |
new_stack.ss_sp = sig_stack; |
796 |
new_stack.ss_flags = 0; |
797 |
new_stack.ss_size = SIG_STACK_SIZE; |
798 |
if (sigaltstack(&new_stack, NULL) < 0) { |
799 |
sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno)); |
800 |
ErrorAlert(str); |
801 |
goto quit; |
802 |
} |
803 |
#endif |
804 |
|
805 |
#if !EMULATED_PPC |
806 |
// Install SIGSEGV and SIGBUS handlers |
807 |
sigemptyset(&sigsegv_action.sa_mask); // Block interrupts during SEGV handling |
808 |
sigaddset(&sigsegv_action.sa_mask, SIGUSR2); |
809 |
sigsegv_action.sa_sigaction = sigsegv_handler; |
810 |
sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO; |
811 |
#ifdef HAVE_SIGNAL_SA_RESTORER |
812 |
sigsegv_action.sa_restorer = NULL; |
813 |
#endif |
814 |
if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) { |
815 |
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno)); |
816 |
ErrorAlert(str); |
817 |
goto quit; |
818 |
} |
819 |
if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) { |
820 |
sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno)); |
821 |
ErrorAlert(str); |
822 |
goto quit; |
823 |
} |
824 |
|
825 |
// Install SIGILL handler |
826 |
sigemptyset(&sigill_action.sa_mask); // Block interrupts during ILL handling |
827 |
sigaddset(&sigill_action.sa_mask, SIGUSR2); |
828 |
sigill_action.sa_sigaction = sigill_handler; |
829 |
sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO; |
830 |
#ifdef HAVE_SIGNAL_SA_RESTORER |
831 |
sigill_action.sa_restorer = NULL; |
832 |
#endif |
833 |
if (sigaction(SIGILL, &sigill_action, NULL) < 0) { |
834 |
sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno)); |
835 |
ErrorAlert(str); |
836 |
goto quit; |
837 |
} |
838 |
#endif |
839 |
|
840 |
#if !EMULATED_PPC |
841 |
// Install interrupt signal handler |
842 |
sigemptyset(&sigusr2_action.sa_mask); |
843 |
sigusr2_action.sa_sigaction = sigusr2_handler; |
844 |
sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO; |
845 |
#ifdef HAVE_SIGNAL_SA_RESTORER |
846 |
sigusr2_action.sa_restorer = NULL; |
847 |
#endif |
848 |
if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) { |
849 |
sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno)); |
850 |
ErrorAlert(str); |
851 |
goto quit; |
852 |
} |
853 |
#endif |
854 |
|
855 |
// Get my thread ID and execute MacOS thread function |
856 |
emul_thread = pthread_self(); |
857 |
D(bug("MacOS thread is %ld\n", emul_thread)); |
858 |
emul_func(NULL); |
859 |
|
860 |
quit: |
861 |
Quit(); |
862 |
return 0; |
863 |
} |
864 |
|
865 |
|
866 |
/* |
867 |
* Cleanup and quit |
868 |
*/ |
869 |
|
870 |
static void Quit(void) |
871 |
{ |
872 |
#if EMULATED_PPC |
873 |
// Exit PowerPC emulation |
874 |
exit_emul_ppc(); |
875 |
#endif |
876 |
|
877 |
// Stop 60Hz thread |
878 |
if (tick_thread_active) { |
879 |
pthread_cancel(tick_thread); |
880 |
pthread_join(tick_thread, NULL); |
881 |
} |
882 |
|
883 |
// Stop NVRAM watchdog thread |
884 |
if (nvram_thread_active) { |
885 |
pthread_cancel(nvram_thread); |
886 |
pthread_join(nvram_thread, NULL); |
887 |
} |
888 |
|
889 |
#if !EMULATED_PPC |
890 |
// Uninstall SIGSEGV and SIGBUS handlers |
891 |
sigemptyset(&sigsegv_action.sa_mask); |
892 |
sigsegv_action.sa_handler = SIG_DFL; |
893 |
sigsegv_action.sa_flags = 0; |
894 |
sigaction(SIGSEGV, &sigsegv_action, NULL); |
895 |
sigaction(SIGBUS, &sigsegv_action, NULL); |
896 |
|
897 |
// Uninstall SIGILL handler |
898 |
sigemptyset(&sigill_action.sa_mask); |
899 |
sigill_action.sa_handler = SIG_DFL; |
900 |
sigill_action.sa_flags = 0; |
901 |
sigaction(SIGILL, &sigill_action, NULL); |
902 |
#endif |
903 |
|
904 |
// Save NVRAM |
905 |
XPRAMExit(); |
906 |
|
907 |
// Exit clipboard |
908 |
ClipExit(); |
909 |
|
910 |
// Exit Time Manager |
911 |
TimerExit(); |
912 |
|
913 |
// Exit serial |
914 |
SerialExit(); |
915 |
|
916 |
// Exit network |
917 |
EtherExit(); |
918 |
|
919 |
// Exit audio |
920 |
AudioExit(); |
921 |
|
922 |
// Exit ADB |
923 |
ADBExit(); |
924 |
|
925 |
// Exit video |
926 |
VideoExit(); |
927 |
|
928 |
// Exit external file system |
929 |
ExtFSExit(); |
930 |
|
931 |
// Exit drivers |
932 |
SCSIExit(); |
933 |
CDROMExit(); |
934 |
DiskExit(); |
935 |
SonyExit(); |
936 |
|
937 |
// Delete thunks |
938 |
ThunksExit(); |
939 |
|
940 |
// Delete SheepShaver globals |
941 |
SheepMem::Exit(); |
942 |
|
943 |
// Delete RAM area |
944 |
if (ram_area_mapped) |
945 |
vm_release((char *)RAM_BASE, RAMSize); |
946 |
|
947 |
// Delete ROM area |
948 |
if (rom_area_mapped) |
949 |
vm_release((char *)ROM_BASE, ROM_AREA_SIZE); |
950 |
|
951 |
// Delete Kernel Data area |
952 |
if (kernel_area >= 0) { |
953 |
shmdt((void *)KERNEL_DATA_BASE); |
954 |
shmdt((void *)KERNEL_DATA2_BASE); |
955 |
shmctl(kernel_area, IPC_RMID, NULL); |
956 |
} |
957 |
|
958 |
// Delete Low Memory area |
959 |
if (lm_area_mapped) |
960 |
munmap((char *)0x0000, 0x3000); |
961 |
|
962 |
// Close /dev/zero |
963 |
if (zero_fd > 0) |
964 |
close(zero_fd); |
965 |
|
966 |
// Exit system routines |
967 |
SysExit(); |
968 |
|
969 |
// Exit preferences |
970 |
PrefsExit(); |
971 |
|
972 |
#ifdef ENABLE_MON |
973 |
// Exit mon |
974 |
mon_exit(); |
975 |
#endif |
976 |
|
977 |
// Close X11 server connection |
978 |
if (x_display) |
979 |
XCloseDisplay(x_display); |
980 |
|
981 |
exit(0); |
982 |
} |
983 |
|
984 |
|
985 |
/* |
986 |
* Jump into Mac ROM, start 680x0 emulator |
987 |
*/ |
988 |
|
989 |
#if EMULATED_PPC |
990 |
void jump_to_rom(uint32 entry) |
991 |
{ |
992 |
init_emul_ppc(); |
993 |
emul_ppc(entry); |
994 |
} |
995 |
#endif |
996 |
|
997 |
|
998 |
/* |
999 |
* Emulator thread function |
1000 |
*/ |
1001 |
|
1002 |
static void *emul_func(void *arg) |
1003 |
{ |
1004 |
// We're now ready to receive signals |
1005 |
ready_for_signals = true; |
1006 |
|
1007 |
// Decrease priority, so more time-critical things like audio will work better |
1008 |
nice(1); |
1009 |
|
1010 |
// Jump to ROM boot routine |
1011 |
D(bug("Jumping to ROM\n")); |
1012 |
#if EMULATED_PPC |
1013 |
jump_to_rom(ROM_BASE + 0x310000); |
1014 |
#else |
1015 |
jump_to_rom(ROM_BASE + 0x310000, (uint32)emulator_data); |
1016 |
#endif |
1017 |
D(bug("Returned from ROM\n")); |
1018 |
|
1019 |
// We're no longer ready to receive signals |
1020 |
ready_for_signals = false; |
1021 |
return NULL; |
1022 |
} |
1023 |
|
1024 |
|
1025 |
#if !EMULATED_PPC |
1026 |
/* |
1027 |
* Execute 68k subroutine (must be ended with RTS) |
1028 |
* This must only be called by the emul_thread when in EMUL_OP mode |
1029 |
* r->a[7] is unused, the routine runs on the caller's stack |
1030 |
*/ |
1031 |
|
1032 |
void Execute68k(uint32 pc, M68kRegisters *r) |
1033 |
{ |
1034 |
#if SAFE_EXEC_68K |
1035 |
if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP) |
1036 |
printf("FATAL: Execute68k() not called from EMUL_OP mode\n"); |
1037 |
if (!pthread_equal(pthread_self(), emul_thread)) |
1038 |
printf("FATAL: Execute68k() not called from emul_thread\n"); |
1039 |
#endif |
1040 |
execute_68k(pc, r); |
1041 |
} |
1042 |
|
1043 |
|
1044 |
/* |
1045 |
* Execute 68k A-Trap from EMUL_OP routine |
1046 |
* r->a[7] is unused, the routine runs on the caller's stack |
1047 |
*/ |
1048 |
|
1049 |
void Execute68kTrap(uint16 trap, M68kRegisters *r) |
1050 |
{ |
1051 |
uint16 proc[2] = {trap, M68K_RTS}; |
1052 |
Execute68k((uint32)proc, r); |
1053 |
} |
1054 |
#endif |
1055 |
|
1056 |
|
1057 |
/* |
1058 |
* Quit emulator (cause return from jump_to_rom) |
1059 |
*/ |
1060 |
|
1061 |
void QuitEmulator(void) |
1062 |
{ |
1063 |
#if EMULATED_PPC |
1064 |
Quit(); |
1065 |
#else |
1066 |
quit_emulator(); |
1067 |
#endif |
1068 |
} |
1069 |
|
1070 |
|
1071 |
/* |
1072 |
* Pause/resume emulator |
1073 |
*/ |
1074 |
|
1075 |
void PauseEmulator(void) |
1076 |
{ |
1077 |
pthread_kill(emul_thread, SIGSTOP); |
1078 |
} |
1079 |
|
1080 |
void ResumeEmulator(void) |
1081 |
{ |
1082 |
pthread_kill(emul_thread, SIGCONT); |
1083 |
} |
1084 |
|
1085 |
|
1086 |
/* |
1087 |
* Dump 68k registers |
1088 |
*/ |
1089 |
|
1090 |
void Dump68kRegs(M68kRegisters *r) |
1091 |
{ |
1092 |
// Display 68k registers |
1093 |
for (int i=0; i<8; i++) { |
1094 |
printf("d%d: %08x", i, r->d[i]); |
1095 |
if (i == 3 || i == 7) |
1096 |
printf("\n"); |
1097 |
else |
1098 |
printf(", "); |
1099 |
} |
1100 |
for (int i=0; i<8; i++) { |
1101 |
printf("a%d: %08x", i, r->a[i]); |
1102 |
if (i == 3 || i == 7) |
1103 |
printf("\n"); |
1104 |
else |
1105 |
printf(", "); |
1106 |
} |
1107 |
} |
1108 |
|
1109 |
|
1110 |
/* |
1111 |
* Make code executable |
1112 |
*/ |
1113 |
|
1114 |
void MakeExecutable(int dummy, void *start, uint32 length) |
1115 |
{ |
1116 |
if (((uintptr)start >= ROM_BASE) && ((uintptr)start < (ROM_BASE + ROM_SIZE))) |
1117 |
return; |
1118 |
#if EMULATED_PPC |
1119 |
FlushCodeCache((uintptr)start, (uintptr)start + length); |
1120 |
#else |
1121 |
flush_icache_range(start, (void *)((uintptr)start + length)); |
1122 |
#endif |
1123 |
} |
1124 |
|
1125 |
|
1126 |
/* |
1127 |
* Patch things after system startup (gets called by disk driver accRun routine) |
1128 |
*/ |
1129 |
|
1130 |
void PatchAfterStartup(void) |
1131 |
{ |
1132 |
ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL); |
1133 |
InstallExtFS(); |
1134 |
} |
1135 |
|
1136 |
|
1137 |
/* |
1138 |
* NVRAM watchdog thread (saves NVRAM every minute) |
1139 |
*/ |
1140 |
|
1141 |
static void *nvram_func(void *arg) |
1142 |
{ |
1143 |
struct timespec req = {60, 0}; // 1 minute |
1144 |
|
1145 |
for (;;) { |
1146 |
pthread_testcancel(); |
1147 |
nanosleep(&req, NULL); |
1148 |
pthread_testcancel(); |
1149 |
if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) { |
1150 |
memcpy(last_xpram, XPRAM, XPRAM_SIZE); |
1151 |
SaveXPRAM(); |
1152 |
} |
1153 |
} |
1154 |
return NULL; |
1155 |
} |
1156 |
|
1157 |
|
1158 |
/* |
1159 |
* 60Hz thread (really 60.15Hz) |
1160 |
*/ |
1161 |
|
1162 |
static void *tick_func(void *arg) |
1163 |
{ |
1164 |
int tick_counter = 0; |
1165 |
struct timespec req = {0, 16625000}; |
1166 |
|
1167 |
for (;;) { |
1168 |
|
1169 |
// Wait |
1170 |
nanosleep(&req, NULL); |
1171 |
|
1172 |
#if !EMULATED_PPC |
1173 |
// Did we crash? |
1174 |
if (emul_thread_fatal) { |
1175 |
|
1176 |
// Yes, dump registers |
1177 |
sigregs *r = &sigsegv_regs; |
1178 |
char str[256]; |
1179 |
if (crash_reason == NULL) |
1180 |
crash_reason = "SIGSEGV"; |
1181 |
sprintf(str, "%s\n" |
1182 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
1183 |
" xer %08lx cr %08lx \n" |
1184 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
1185 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
1186 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
1187 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
1188 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
1189 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
1190 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
1191 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
1192 |
crash_reason, |
1193 |
r->nip, r->link, r->ctr, r->msr, |
1194 |
r->xer, r->ccr, |
1195 |
r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3], |
1196 |
r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7], |
1197 |
r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11], |
1198 |
r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15], |
1199 |
r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19], |
1200 |
r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23], |
1201 |
r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27], |
1202 |
r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]); |
1203 |
printf(str); |
1204 |
VideoQuitFullScreen(); |
1205 |
|
1206 |
#ifdef ENABLE_MON |
1207 |
// Start up mon in real-mode |
1208 |
printf("Welcome to the sheep factory.\n"); |
1209 |
char *arg[4] = {"mon", "-m", "-r", NULL}; |
1210 |
mon(3, arg); |
1211 |
#endif |
1212 |
return NULL; |
1213 |
} |
1214 |
#endif |
1215 |
|
1216 |
// Pseudo Mac 1Hz interrupt, update local time |
1217 |
if (++tick_counter > 60) { |
1218 |
tick_counter = 0; |
1219 |
WriteMacInt32(0x20c, TimerDateTime()); |
1220 |
} |
1221 |
|
1222 |
// Trigger 60Hz interrupt |
1223 |
if (ReadMacInt32(XLM_IRQ_NEST) == 0) { |
1224 |
SetInterruptFlag(INTFLAG_VIA); |
1225 |
TriggerInterrupt(); |
1226 |
} |
1227 |
} |
1228 |
return NULL; |
1229 |
} |
1230 |
|
1231 |
|
1232 |
/* |
1233 |
* Pthread configuration |
1234 |
*/ |
1235 |
|
1236 |
void Set_pthread_attr(pthread_attr_t *attr, int priority) |
1237 |
{ |
1238 |
#ifdef HAVE_PTHREADS |
1239 |
pthread_attr_init(attr); |
1240 |
#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING) |
1241 |
// Some of these only work for superuser |
1242 |
if (geteuid() == 0) { |
1243 |
pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED); |
1244 |
pthread_attr_setschedpolicy(attr, SCHED_FIFO); |
1245 |
struct sched_param fifo_param; |
1246 |
fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) + |
1247 |
sched_get_priority_max(SCHED_FIFO)) / 2 + |
1248 |
priority); |
1249 |
pthread_attr_setschedparam(attr, &fifo_param); |
1250 |
} |
1251 |
if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) { |
1252 |
#ifdef PTHREAD_SCOPE_BOUND_NP |
1253 |
// If system scope is not available (eg. we're not running |
1254 |
// with CAP_SCHED_MGT capability on an SGI box), try bound |
1255 |
// scope. It exposes pthread scheduling to the kernel, |
1256 |
// without setting realtime priority. |
1257 |
pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP); |
1258 |
#endif |
1259 |
} |
1260 |
#endif |
1261 |
#endif |
1262 |
} |
1263 |
|
1264 |
|
1265 |
/* |
1266 |
* Mutexes |
1267 |
*/ |
1268 |
|
1269 |
#ifdef HAVE_PTHREADS |
1270 |
|
1271 |
struct B2_mutex { |
1272 |
B2_mutex() { |
1273 |
pthread_mutexattr_t attr; |
1274 |
pthread_mutexattr_init(&attr); |
1275 |
// Initialize the mutex for priority inheritance -- |
1276 |
// required for accurate timing. |
1277 |
#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL |
1278 |
pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT); |
1279 |
#endif |
1280 |
#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL) |
1281 |
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL); |
1282 |
#endif |
1283 |
#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED |
1284 |
pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE); |
1285 |
#endif |
1286 |
pthread_mutex_init(&m, &attr); |
1287 |
pthread_mutexattr_destroy(&attr); |
1288 |
} |
1289 |
~B2_mutex() { |
1290 |
pthread_mutex_trylock(&m); // Make sure it's locked before |
1291 |
pthread_mutex_unlock(&m); // unlocking it. |
1292 |
pthread_mutex_destroy(&m); |
1293 |
} |
1294 |
pthread_mutex_t m; |
1295 |
}; |
1296 |
|
1297 |
B2_mutex *B2_create_mutex(void) |
1298 |
{ |
1299 |
return new B2_mutex; |
1300 |
} |
1301 |
|
1302 |
void B2_lock_mutex(B2_mutex *mutex) |
1303 |
{ |
1304 |
pthread_mutex_lock(&mutex->m); |
1305 |
} |
1306 |
|
1307 |
void B2_unlock_mutex(B2_mutex *mutex) |
1308 |
{ |
1309 |
pthread_mutex_unlock(&mutex->m); |
1310 |
} |
1311 |
|
1312 |
void B2_delete_mutex(B2_mutex *mutex) |
1313 |
{ |
1314 |
delete mutex; |
1315 |
} |
1316 |
|
1317 |
#else |
1318 |
|
1319 |
struct B2_mutex { |
1320 |
int dummy; |
1321 |
}; |
1322 |
|
1323 |
B2_mutex *B2_create_mutex(void) |
1324 |
{ |
1325 |
return new B2_mutex; |
1326 |
} |
1327 |
|
1328 |
void B2_lock_mutex(B2_mutex *mutex) |
1329 |
{ |
1330 |
} |
1331 |
|
1332 |
void B2_unlock_mutex(B2_mutex *mutex) |
1333 |
{ |
1334 |
} |
1335 |
|
1336 |
void B2_delete_mutex(B2_mutex *mutex) |
1337 |
{ |
1338 |
delete mutex; |
1339 |
} |
1340 |
|
1341 |
#endif |
1342 |
|
1343 |
|
1344 |
/* |
1345 |
* Trigger signal USR2 from another thread |
1346 |
*/ |
1347 |
|
1348 |
#if !EMULATED_PPC || ASYNC_IRQ |
1349 |
void TriggerInterrupt(void) |
1350 |
{ |
1351 |
if (ready_for_signals) |
1352 |
pthread_kill(emul_thread, SIGUSR2); |
1353 |
} |
1354 |
#endif |
1355 |
|
1356 |
|
1357 |
/* |
1358 |
* Interrupt flags (must be handled atomically!) |
1359 |
*/ |
1360 |
|
1361 |
volatile uint32 InterruptFlags = 0; |
1362 |
|
1363 |
void SetInterruptFlag(uint32 flag) |
1364 |
{ |
1365 |
atomic_or((int *)&InterruptFlags, flag); |
1366 |
} |
1367 |
|
1368 |
void ClearInterruptFlag(uint32 flag) |
1369 |
{ |
1370 |
atomic_and((int *)&InterruptFlags, ~flag); |
1371 |
} |
1372 |
|
1373 |
|
1374 |
/* |
1375 |
* Disable interrupts |
1376 |
*/ |
1377 |
|
1378 |
void DisableInterrupt(void) |
1379 |
{ |
1380 |
atomic_add((int *)XLM_IRQ_NEST, 1); |
1381 |
} |
1382 |
|
1383 |
|
1384 |
/* |
1385 |
* Enable interrupts |
1386 |
*/ |
1387 |
|
1388 |
void EnableInterrupt(void) |
1389 |
{ |
1390 |
atomic_add((int *)XLM_IRQ_NEST, -1); |
1391 |
} |
1392 |
|
1393 |
|
1394 |
/* |
1395 |
* USR2 handler |
1396 |
*/ |
1397 |
|
1398 |
#if EMULATED_PPC |
1399 |
static void sigusr2_handler(int sig) |
1400 |
{ |
1401 |
#if ASYNC_IRQ |
1402 |
extern void HandleInterrupt(void); |
1403 |
HandleInterrupt(); |
1404 |
#endif |
1405 |
} |
1406 |
#else |
1407 |
static void sigusr2_handler(int sig, siginfo_t *sip, void *scp) |
1408 |
{ |
1409 |
machine_regs *r = MACHINE_REGISTERS(scp); |
1410 |
|
1411 |
// Do nothing if interrupts are disabled |
1412 |
if (*(int32 *)XLM_IRQ_NEST > 0) |
1413 |
return; |
1414 |
|
1415 |
// Disable MacOS stack sniffer |
1416 |
WriteMacInt32(0x110, 0); |
1417 |
|
1418 |
// Interrupt action depends on current run mode |
1419 |
switch (ReadMacInt32(XLM_RUN_MODE)) { |
1420 |
case MODE_68K: |
1421 |
// 68k emulator active, trigger 68k interrupt level 1 |
1422 |
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1); |
1423 |
r->cr() |= ntohl(kernel_data->v[0x674 >> 2]); |
1424 |
break; |
1425 |
|
1426 |
#if INTERRUPTS_IN_NATIVE_MODE |
1427 |
case MODE_NATIVE: |
1428 |
// 68k emulator inactive, in nanokernel? |
1429 |
if (r->gpr(1) != KernelDataAddr) { |
1430 |
// Prepare for 68k interrupt level 1 |
1431 |
WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1); |
1432 |
WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2])); |
1433 |
|
1434 |
// Execute nanokernel interrupt routine (this will activate the 68k emulator) |
1435 |
atomic_add((int32 *)XLM_IRQ_NEST, 1); |
1436 |
if (ROMType == ROMTYPE_NEWWORLD) |
1437 |
ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr); |
1438 |
else |
1439 |
ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr); |
1440 |
} |
1441 |
break; |
1442 |
#endif |
1443 |
|
1444 |
#if INTERRUPTS_IN_EMUL_OP_MODE |
1445 |
case MODE_EMUL_OP: |
1446 |
// 68k emulator active, within EMUL_OP routine, execute 68k interrupt routine directly when interrupt level is 0 |
1447 |
if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) { |
1448 |
|
1449 |
// Set extra stack for SIGSEGV handler |
1450 |
struct sigaltstack new_stack; |
1451 |
new_stack.ss_sp = extra_stack; |
1452 |
new_stack.ss_flags = 0; |
1453 |
new_stack.ss_size = SIG_STACK_SIZE; |
1454 |
sigaltstack(&new_stack, NULL); |
1455 |
#if 1 |
1456 |
// Execute full 68k interrupt routine |
1457 |
M68kRegisters r; |
1458 |
uint32 old_r25 = ReadMacInt32(XLM_68K_R25); // Save interrupt level |
1459 |
WriteMacInt32(XLM_68K_R25, 0x21); // Execute with interrupt level 1 |
1460 |
static const uint16 proc[] = { |
1461 |
0x3f3c, 0x0000, // move.w #$0000,-(sp) (fake format word) |
1462 |
0x487a, 0x000a, // pea @1(pc) (return address) |
1463 |
0x40e7, // move sr,-(sp) (saved SR) |
1464 |
0x2078, 0x0064, // move.l $64,a0 |
1465 |
0x4ed0, // jmp (a0) |
1466 |
M68K_RTS // @1 |
1467 |
}; |
1468 |
Execute68k((uint32)proc, &r); |
1469 |
WriteMacInt32(XLM_68K_R25, old_r25); // Restore interrupt level |
1470 |
#else |
1471 |
// Only update cursor |
1472 |
if (HasMacStarted()) { |
1473 |
if (InterruptFlags & INTFLAG_VIA) { |
1474 |
ClearInterruptFlag(INTFLAG_VIA); |
1475 |
ADBInterrupt(); |
1476 |
ExecuteNative(NATIVE_VIDEO_VBL); |
1477 |
} |
1478 |
} |
1479 |
#endif |
1480 |
// Reset normal signal stack |
1481 |
new_stack.ss_sp = sig_stack; |
1482 |
new_stack.ss_flags = 0; |
1483 |
new_stack.ss_size = SIG_STACK_SIZE; |
1484 |
sigaltstack(&new_stack, NULL); |
1485 |
} |
1486 |
break; |
1487 |
#endif |
1488 |
} |
1489 |
} |
1490 |
#endif |
1491 |
|
1492 |
|
1493 |
/* |
1494 |
* SIGSEGV handler |
1495 |
*/ |
1496 |
|
1497 |
#if !EMULATED_PPC |
1498 |
static void sigsegv_handler(int sig, siginfo_t *sip, void *scp) |
1499 |
{ |
1500 |
machine_regs *r = MACHINE_REGISTERS(scp); |
1501 |
|
1502 |
// Get effective address |
1503 |
uint32 addr = r->dar(); |
1504 |
|
1505 |
#if ENABLE_VOSF |
1506 |
// Handle screen fault. |
1507 |
extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction); |
1508 |
if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc())) |
1509 |
return; |
1510 |
#endif |
1511 |
|
1512 |
num_segv++; |
1513 |
|
1514 |
// Fault in Mac ROM or RAM? |
1515 |
bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)); |
1516 |
if (mac_fault) { |
1517 |
|
1518 |
// "VM settings" during MacOS 8 installation |
1519 |
if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) { |
1520 |
r->pc() += 4; |
1521 |
r->gpr(8) = 0; |
1522 |
return; |
1523 |
|
1524 |
// MacOS 8.5 installation |
1525 |
} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) { |
1526 |
r->pc() += 4; |
1527 |
r->gpr(8) = 0; |
1528 |
return; |
1529 |
|
1530 |
// MacOS 8 serial drivers on startup |
1531 |
} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) { |
1532 |
r->pc() += 4; |
1533 |
r->gpr(8) = 0; |
1534 |
return; |
1535 |
|
1536 |
// MacOS 8.1 serial drivers on startup |
1537 |
} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) { |
1538 |
r->pc() += 4; |
1539 |
return; |
1540 |
} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) { |
1541 |
r->pc() += 4; |
1542 |
return; |
1543 |
} |
1544 |
|
1545 |
// Get opcode and divide into fields |
1546 |
uint32 opcode = *((uint32 *)r->pc()); |
1547 |
uint32 primop = opcode >> 26; |
1548 |
uint32 exop = (opcode >> 1) & 0x3ff; |
1549 |
uint32 ra = (opcode >> 16) & 0x1f; |
1550 |
uint32 rb = (opcode >> 11) & 0x1f; |
1551 |
uint32 rd = (opcode >> 21) & 0x1f; |
1552 |
int32 imm = (int16)(opcode & 0xffff); |
1553 |
|
1554 |
// Analyze opcode |
1555 |
enum { |
1556 |
TYPE_UNKNOWN, |
1557 |
TYPE_LOAD, |
1558 |
TYPE_STORE |
1559 |
} transfer_type = TYPE_UNKNOWN; |
1560 |
enum { |
1561 |
SIZE_UNKNOWN, |
1562 |
SIZE_BYTE, |
1563 |
SIZE_HALFWORD, |
1564 |
SIZE_WORD |
1565 |
} transfer_size = SIZE_UNKNOWN; |
1566 |
enum { |
1567 |
MODE_UNKNOWN, |
1568 |
MODE_NORM, |
1569 |
MODE_U, |
1570 |
MODE_X, |
1571 |
MODE_UX |
1572 |
} addr_mode = MODE_UNKNOWN; |
1573 |
switch (primop) { |
1574 |
case 31: |
1575 |
switch (exop) { |
1576 |
case 23: // lwzx |
1577 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
1578 |
case 55: // lwzux |
1579 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
1580 |
case 87: // lbzx |
1581 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
1582 |
case 119: // lbzux |
1583 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
1584 |
case 151: // stwx |
1585 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_X; break; |
1586 |
case 183: // stwux |
1587 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_UX; break; |
1588 |
case 215: // stbx |
1589 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_X; break; |
1590 |
case 247: // stbux |
1591 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_UX; break; |
1592 |
case 279: // lhzx |
1593 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
1594 |
case 311: // lhzux |
1595 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
1596 |
case 343: // lhax |
1597 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
1598 |
case 375: // lhaux |
1599 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
1600 |
case 407: // sthx |
1601 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_X; break; |
1602 |
case 439: // sthux |
1603 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_UX; break; |
1604 |
} |
1605 |
break; |
1606 |
|
1607 |
case 32: // lwz |
1608 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
1609 |
case 33: // lwzu |
1610 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
1611 |
case 34: // lbz |
1612 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
1613 |
case 35: // lbzu |
1614 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
1615 |
case 36: // stw |
1616 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break; |
1617 |
case 37: // stwu |
1618 |
transfer_type = TYPE_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break; |
1619 |
case 38: // stb |
1620 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_NORM; break; |
1621 |
case 39: // stbu |
1622 |
transfer_type = TYPE_STORE; transfer_size = SIZE_BYTE; addr_mode = MODE_U; break; |
1623 |
case 40: // lhz |
1624 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
1625 |
case 41: // lhzu |
1626 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
1627 |
case 42: // lha |
1628 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
1629 |
case 43: // lhau |
1630 |
transfer_type = TYPE_LOAD; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
1631 |
case 44: // sth |
1632 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break; |
1633 |
case 45: // sthu |
1634 |
transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break; |
1635 |
#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE |
1636 |
case 46: // lmw |
1637 |
if ((addr % 4) != 0) { |
1638 |
uint32 ea = addr; |
1639 |
D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc())); |
1640 |
for (int i = rd; i <= 31; i++) { |
1641 |
r->gpr(i) = ReadMacInt32(ea); |
1642 |
ea += 4; |
1643 |
} |
1644 |
r->pc() += 4; |
1645 |
goto rti; |
1646 |
} |
1647 |
break; |
1648 |
case 47: // stmw |
1649 |
if ((addr % 4) != 0) { |
1650 |
uint32 ea = addr; |
1651 |
D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc())); |
1652 |
for (int i = rd; i <= 31; i++) { |
1653 |
WriteMacInt32(ea, r->gpr(i)); |
1654 |
ea += 4; |
1655 |
} |
1656 |
r->pc() += 4; |
1657 |
goto rti; |
1658 |
} |
1659 |
break; |
1660 |
#endif |
1661 |
} |
1662 |
|
1663 |
// Ignore ROM writes (including to the zero page, which is read-only) |
1664 |
if (transfer_type == TYPE_STORE && |
1665 |
((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) || |
1666 |
(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) { |
1667 |
// 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())); |
1668 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
1669 |
r->gpr(ra) = addr; |
1670 |
r->pc() += 4; |
1671 |
goto rti; |
1672 |
} |
1673 |
|
1674 |
// Ignore illegal memory accesses? |
1675 |
if (PrefsFindBool("ignoresegv")) { |
1676 |
if (addr_mode == MODE_U || addr_mode == MODE_UX) |
1677 |
r->gpr(ra) = addr; |
1678 |
if (transfer_type == TYPE_LOAD) |
1679 |
r->gpr(rd) = 0; |
1680 |
r->pc() += 4; |
1681 |
goto rti; |
1682 |
} |
1683 |
|
1684 |
// In GUI mode, show error alert |
1685 |
if (!PrefsFindBool("nogui")) { |
1686 |
char str[256]; |
1687 |
if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE) |
1688 |
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)); |
1689 |
else |
1690 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode); |
1691 |
ErrorAlert(str); |
1692 |
QuitEmulator(); |
1693 |
return; |
1694 |
} |
1695 |
} |
1696 |
|
1697 |
// For all other errors, jump into debugger (sort of...) |
1698 |
crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV"; |
1699 |
if (!ready_for_signals) { |
1700 |
printf("%s\n"); |
1701 |
printf(" sigcontext %p, machine_regs %p\n", scp, r); |
1702 |
printf( |
1703 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
1704 |
" xer %08lx cr %08lx \n" |
1705 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
1706 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
1707 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
1708 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
1709 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
1710 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
1711 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
1712 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
1713 |
crash_reason, |
1714 |
r->pc(), r->lr(), r->ctr(), r->msr(), |
1715 |
r->xer(), r->cr(), |
1716 |
r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3), |
1717 |
r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7), |
1718 |
r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11), |
1719 |
r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15), |
1720 |
r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19), |
1721 |
r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23), |
1722 |
r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27), |
1723 |
r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31)); |
1724 |
exit(1); |
1725 |
QuitEmulator(); |
1726 |
return; |
1727 |
} else { |
1728 |
// We crashed. Save registers, tell tick thread and loop forever |
1729 |
build_sigregs(&sigsegv_regs, r); |
1730 |
emul_thread_fatal = true; |
1731 |
for (;;) ; |
1732 |
} |
1733 |
rti:; |
1734 |
} |
1735 |
|
1736 |
|
1737 |
/* |
1738 |
* SIGILL handler |
1739 |
*/ |
1740 |
|
1741 |
static void sigill_handler(int sig, siginfo_t *sip, void *scp) |
1742 |
{ |
1743 |
machine_regs *r = MACHINE_REGISTERS(scp); |
1744 |
char str[256]; |
1745 |
|
1746 |
// Fault in Mac ROM or RAM? |
1747 |
bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)); |
1748 |
if (mac_fault) { |
1749 |
|
1750 |
// Get opcode and divide into fields |
1751 |
uint32 opcode = *((uint32 *)r->pc()); |
1752 |
uint32 primop = opcode >> 26; |
1753 |
uint32 exop = (opcode >> 1) & 0x3ff; |
1754 |
uint32 ra = (opcode >> 16) & 0x1f; |
1755 |
uint32 rb = (opcode >> 11) & 0x1f; |
1756 |
uint32 rd = (opcode >> 21) & 0x1f; |
1757 |
int32 imm = (int16)(opcode & 0xffff); |
1758 |
|
1759 |
switch (primop) { |
1760 |
case 9: // POWER instructions |
1761 |
case 22: |
1762 |
power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode); |
1763 |
ErrorAlert(str); |
1764 |
QuitEmulator(); |
1765 |
return; |
1766 |
|
1767 |
case 31: |
1768 |
switch (exop) { |
1769 |
case 83: // mfmsr |
1770 |
r->gpr(rd) = 0xf072; |
1771 |
r->pc() += 4; |
1772 |
goto rti; |
1773 |
|
1774 |
case 210: // mtsr |
1775 |
case 242: // mtsrin |
1776 |
case 306: // tlbie |
1777 |
r->pc() += 4; |
1778 |
goto rti; |
1779 |
|
1780 |
case 339: { // mfspr |
1781 |
int spr = ra | (rb << 5); |
1782 |
switch (spr) { |
1783 |
case 0: // MQ |
1784 |
case 22: // DEC |
1785 |
case 952: // MMCR0 |
1786 |
case 953: // PMC1 |
1787 |
case 954: // PMC2 |
1788 |
case 955: // SIA |
1789 |
case 956: // MMCR1 |
1790 |
case 957: // PMC3 |
1791 |
case 958: // PMC4 |
1792 |
case 959: // SDA |
1793 |
r->pc() += 4; |
1794 |
goto rti; |
1795 |
case 25: // SDR1 |
1796 |
r->gpr(rd) = 0xdead001f; |
1797 |
r->pc() += 4; |
1798 |
goto rti; |
1799 |
case 287: // PVR |
1800 |
r->gpr(rd) = PVR; |
1801 |
r->pc() += 4; |
1802 |
goto rti; |
1803 |
} |
1804 |
break; |
1805 |
} |
1806 |
|
1807 |
case 467: { // mtspr |
1808 |
int spr = ra | (rb << 5); |
1809 |
switch (spr) { |
1810 |
case 0: // MQ |
1811 |
case 22: // DEC |
1812 |
case 275: // SPRG3 |
1813 |
case 528: // IBAT0U |
1814 |
case 529: // IBAT0L |
1815 |
case 530: // IBAT1U |
1816 |
case 531: // IBAT1L |
1817 |
case 532: // IBAT2U |
1818 |
case 533: // IBAT2L |
1819 |
case 534: // IBAT3U |
1820 |
case 535: // IBAT3L |
1821 |
case 536: // DBAT0U |
1822 |
case 537: // DBAT0L |
1823 |
case 538: // DBAT1U |
1824 |
case 539: // DBAT1L |
1825 |
case 540: // DBAT2U |
1826 |
case 541: // DBAT2L |
1827 |
case 542: // DBAT3U |
1828 |
case 543: // DBAT3L |
1829 |
case 952: // MMCR0 |
1830 |
case 953: // PMC1 |
1831 |
case 954: // PMC2 |
1832 |
case 955: // SIA |
1833 |
case 956: // MMCR1 |
1834 |
case 957: // PMC3 |
1835 |
case 958: // PMC4 |
1836 |
case 959: // SDA |
1837 |
r->pc() += 4; |
1838 |
goto rti; |
1839 |
} |
1840 |
break; |
1841 |
} |
1842 |
|
1843 |
case 29: case 107: case 152: case 153: // POWER instructions |
1844 |
case 184: case 216: case 217: case 248: |
1845 |
case 264: case 277: case 331: case 360: |
1846 |
case 363: case 488: case 531: case 537: |
1847 |
case 541: case 664: case 665: case 696: |
1848 |
case 728: case 729: case 760: case 920: |
1849 |
case 921: case 952: |
1850 |
goto power_inst; |
1851 |
} |
1852 |
} |
1853 |
|
1854 |
// In GUI mode, show error alert |
1855 |
if (!PrefsFindBool("nogui")) { |
1856 |
sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode); |
1857 |
ErrorAlert(str); |
1858 |
QuitEmulator(); |
1859 |
return; |
1860 |
} |
1861 |
} |
1862 |
|
1863 |
// For all other errors, jump into debugger (sort of...) |
1864 |
crash_reason = "SIGILL"; |
1865 |
if (!ready_for_signals) { |
1866 |
printf("%s\n"); |
1867 |
printf(" sigcontext %p, machine_regs %p\n", scp, r); |
1868 |
printf( |
1869 |
" pc %08lx lr %08lx ctr %08lx msr %08lx\n" |
1870 |
" xer %08lx cr %08lx \n" |
1871 |
" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n" |
1872 |
" r4 %08lx r5 %08lx r6 %08lx r7 %08lx\n" |
1873 |
" r8 %08lx r9 %08lx r10 %08lx r11 %08lx\n" |
1874 |
" r12 %08lx r13 %08lx r14 %08lx r15 %08lx\n" |
1875 |
" r16 %08lx r17 %08lx r18 %08lx r19 %08lx\n" |
1876 |
" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n" |
1877 |
" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n" |
1878 |
" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n", |
1879 |
crash_reason, |
1880 |
r->pc(), r->lr(), r->ctr(), r->msr(), |
1881 |
r->xer(), r->cr(), |
1882 |
r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3), |
1883 |
r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7), |
1884 |
r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11), |
1885 |
r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15), |
1886 |
r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19), |
1887 |
r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23), |
1888 |
r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27), |
1889 |
r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31)); |
1890 |
exit(1); |
1891 |
QuitEmulator(); |
1892 |
return; |
1893 |
} else { |
1894 |
// We crashed. Save registers, tell tick thread and loop forever |
1895 |
build_sigregs(&sigsegv_regs, r); |
1896 |
emul_thread_fatal = true; |
1897 |
for (;;) ; |
1898 |
} |
1899 |
rti:; |
1900 |
} |
1901 |
#endif |
1902 |
|
1903 |
|
1904 |
/* |
1905 |
* Helpers to share 32-bit addressable data with MacOS |
1906 |
*/ |
1907 |
|
1908 |
bool SheepMem::Init(void) |
1909 |
{ |
1910 |
// Size of a native page |
1911 |
page_size = getpagesize(); |
1912 |
|
1913 |
// Allocate SheepShaver globals |
1914 |
if (vm_acquire_fixed((char *)base, size) < 0) |
1915 |
return false; |
1916 |
|
1917 |
// Allocate page with all bits set to 0 |
1918 |
zero_page = base + size; |
1919 |
if (vm_acquire_fixed((char *)zero_page, page_size) < 0) |
1920 |
return false; |
1921 |
memset((char *)zero_page, 0, page_size); |
1922 |
if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0) |
1923 |
return false; |
1924 |
|
1925 |
#if EMULATED_PPC |
1926 |
// Allocate alternate stack for PowerPC interrupt routine |
1927 |
sig_stack = zero_page + page_size; |
1928 |
if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0) |
1929 |
return false; |
1930 |
#endif |
1931 |
|
1932 |
top = base + size; |
1933 |
return true; |
1934 |
} |
1935 |
|
1936 |
void SheepMem::Exit(void) |
1937 |
{ |
1938 |
if (top) { |
1939 |
// Delete SheepShaver globals |
1940 |
vm_release((void *)base, size); |
1941 |
|
1942 |
// Delete zero page |
1943 |
vm_release((void *)zero_page, page_size); |
1944 |
|
1945 |
#if EMULATED_PPC |
1946 |
// Delete alternate stack for PowerPC interrupt routine |
1947 |
vm_release((void *)sig_stack, SIG_STACK_SIZE); |
1948 |
#endif |
1949 |
} |
1950 |
} |
1951 |
|
1952 |
|
1953 |
/* |
1954 |
* Display alert |
1955 |
*/ |
1956 |
|
1957 |
#ifdef ENABLE_GTK |
1958 |
static void dl_destroyed(void) |
1959 |
{ |
1960 |
gtk_main_quit(); |
1961 |
} |
1962 |
|
1963 |
static void dl_quit(GtkWidget *dialog) |
1964 |
{ |
1965 |
gtk_widget_destroy(dialog); |
1966 |
} |
1967 |
|
1968 |
void display_alert(int title_id, int prefix_id, int button_id, const char *text) |
1969 |
{ |
1970 |
char str[256]; |
1971 |
sprintf(str, GetString(prefix_id), text); |
1972 |
|
1973 |
GtkWidget *dialog = gtk_dialog_new(); |
1974 |
gtk_window_set_title(GTK_WINDOW(dialog), GetString(title_id)); |
1975 |
gtk_container_border_width(GTK_CONTAINER(dialog), 5); |
1976 |
gtk_widget_set_uposition(GTK_WIDGET(dialog), 100, 150); |
1977 |
gtk_signal_connect(GTK_OBJECT(dialog), "destroy", GTK_SIGNAL_FUNC(dl_destroyed), NULL); |
1978 |
|
1979 |
GtkWidget *label = gtk_label_new(str); |
1980 |
gtk_widget_show(label); |
1981 |
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), label, TRUE, TRUE, 0); |
1982 |
|
1983 |
GtkWidget *button = gtk_button_new_with_label(GetString(button_id)); |
1984 |
gtk_widget_show(button); |
1985 |
gtk_signal_connect_object(GTK_OBJECT(button), "clicked", GTK_SIGNAL_FUNC(dl_quit), GTK_OBJECT(dialog)); |
1986 |
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, FALSE, FALSE, 0); |
1987 |
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT); |
1988 |
gtk_widget_grab_default(button); |
1989 |
gtk_widget_show(dialog); |
1990 |
|
1991 |
gtk_main(); |
1992 |
} |
1993 |
#endif |
1994 |
|
1995 |
|
1996 |
/* |
1997 |
* Display error alert |
1998 |
*/ |
1999 |
|
2000 |
void ErrorAlert(const char *text) |
2001 |
{ |
2002 |
#ifdef ENABLE_GTK |
2003 |
if (PrefsFindBool("nogui") || x_display == NULL) { |
2004 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
2005 |
return; |
2006 |
} |
2007 |
VideoQuitFullScreen(); |
2008 |
display_alert(STR_ERROR_ALERT_TITLE, STR_GUI_ERROR_PREFIX, STR_QUIT_BUTTON, text); |
2009 |
#else |
2010 |
printf(GetString(STR_SHELL_ERROR_PREFIX), text); |
2011 |
#endif |
2012 |
} |
2013 |
|
2014 |
|
2015 |
/* |
2016 |
* Display warning alert |
2017 |
*/ |
2018 |
|
2019 |
void WarningAlert(const char *text) |
2020 |
{ |
2021 |
#ifdef ENABLE_GTK |
2022 |
if (PrefsFindBool("nogui") || x_display == NULL) { |
2023 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
2024 |
return; |
2025 |
} |
2026 |
display_alert(STR_WARNING_ALERT_TITLE, STR_GUI_WARNING_PREFIX, STR_OK_BUTTON, text); |
2027 |
#else |
2028 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
2029 |
#endif |
2030 |
} |
2031 |
|
2032 |
|
2033 |
/* |
2034 |
* Display choice alert |
2035 |
*/ |
2036 |
|
2037 |
bool ChoiceAlert(const char *text, const char *pos, const char *neg) |
2038 |
{ |
2039 |
printf(GetString(STR_SHELL_WARNING_PREFIX), text); |
2040 |
return false; //!! |
2041 |
} |