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root/cebix/SheepShaver/src/Unix/main_unix.cpp

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.8 by gbeauche, 2003-09-29T15:46:07Z vs.
Revision 1.49 by gbeauche, 2004-07-07T04:33:37Z

#	Line 1 | Line 1
1		/*
2		*  main_unix.cpp - Emulation core, Unix implementation
3		*
4	<	*  SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
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
#	Line 65 | Line 65
65		*  ExecutePPC (or any function that might cause a mode switch). The signal
66		*  stack is restored before exiting the SIGUSR2 handler.
67		*
68	+	*  There is apparently another problem when processing signals. In
69	+	*  fullscreen mode, we get quick updates of the mouse position. This
70	+	*  causes an increased number of calls to TriggerInterrupt(). And,
71	+	*  since IRQ_NEST is not fully handled atomically, nested calls to
72	+	*  ppc_interrupt() may cause stack corruption to eventually crash the
73	+	*  emulator.
74	+	*
75	+	*  FIXME:
76	+	*  The current solution is to allocate another signal stack when
77	+	*  processing ppc_interrupt(). However, it may be better to detect
78	+	*  the INTFLAG_ADB case and handle it specifically with some extra mutex?
79	+	*
80		*  TODO:
81		*    check if SIGSEGV handler works for all registers (including FP!)
82		*/
#	Line 109 | Line 121
121		#include "user_strings.h"
122		#include "vm_alloc.h"
123		#include "sigsegv.h"
124	+	#include "thunks.h"
125
126		#define DEBUG 0
127		#include "debug.h"
128
129
130	+	#ifdef HAVE_DIRENT_H
131	+	#include <dirent.h>
132	+	#endif
133	+
134	+	#ifdef USE_SDL
135	+	#include <SDL.h>
136	+	#endif
137	+
138	+	#ifndef USE_SDL_VIDEO
139		#include <X11/Xlib.h>
140	+	#endif
141
142		#ifdef ENABLE_GTK
143		#include <gtk/gtk.h>
#	Line 131 | Line 154
154		#endif
155
156
157	+	// Enable emulation of unaligned lmw/stmw?
158	+	#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
159	+
160		// Enable Execute68k() safety checks?
161		#define SAFE_EXEC_68K 0
162
#	Line 140 | Line 166
166		// Interrupts in native mode?
167		#define INTERRUPTS_IN_NATIVE_MODE 1
168
169	+	// Number of alternate stacks for signal handlers?
170	+	#define SIG_STACK_COUNT 4
171	+
172
173		// Constants
174		const char ROM_FILE_NAME[] = "ROM";
175		const char ROM_FILE_NAME2[] = "Mac OS ROM";
176
177	<	const uint32 RAM_BASE = 0x20000000;                     // Base address of RAM
177	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
178		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
179
180
181		#if !EMULATED_PPC
153	–	// Structure in which registers are saved in a signal handler;
154	–	// sigcontext->regs points to it
155	–	// (see arch/ppc/kernel/signal.c)
156	–	typedef struct {
157	–	uint32 u[4];
158	–	} __attribute((aligned(16))) vector128;
159	–	#include <linux/elf.h>
160	–
182		struct sigregs {
183	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
184	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
185	<	//more (uninteresting) stuff following here
183	>	uint32 nip;
184	>	uint32 link;
185	>	uint32 ctr;
186	>	uint32 msr;
187	>	uint32 xer;
188	>	uint32 ccr;
189	>	uint32 gpr[32];
190	>	};
191	>
192	>	#if defined(__linux__)
193	>	#include <sys/ucontext.h>
194	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
195	>
196	>	struct machine_regs : public pt_regs
197	>	{
198	>	u_long & cr()                           { return pt_regs::ccr; }
199	>	uint32 cr() const                       { return pt_regs::ccr; }
200	>	uint32 lr() const                       { return pt_regs::link; }
201	>	uint32 ctr() const                      { return pt_regs::ctr; }
202	>	uint32 xer() const                      { return pt_regs::xer; }
203	>	uint32 msr() const                      { return pt_regs::msr; }
204	>	uint32 dar() const                      { return pt_regs::dar; }
205	>	u_long & pc()                           { return pt_regs::nip; }
206	>	uint32 pc() const                       { return pt_regs::nip; }
207	>	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
208	>	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
209	>	};
210	>	#endif
211	>
212	>	#if defined(__APPLE__) && defined(__MACH__)
213	>	#include <sys/signal.h>
214	>	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
215	>
216	>	#include <sys/ucontext.h>
217	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
218	>
219	>	struct machine_regs : public mcontext
220	>	{
221	>	uint32 & cr()                           { return ss.cr; }
222	>	uint32 cr() const                       { return ss.cr; }
223	>	uint32 lr() const                       { return ss.lr; }
224	>	uint32 ctr() const                      { return ss.ctr; }
225	>	uint32 xer() const                      { return ss.xer; }
226	>	uint32 msr() const                      { return ss.srr1; }
227	>	uint32 dar() const                      { return es.dar; }
228	>	uint32 & pc()                           { return ss.srr0; }
229	>	uint32 pc() const                       { return ss.srr0; }
230	>	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
231	>	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
232		};
233		#endif
234
235	+	static void build_sigregs(sigregs *srp, machine_regs *mrp)
236	+	{
237	+	srp->nip = mrp->pc();
238	+	srp->link = mrp->lr();
239	+	srp->ctr = mrp->ctr();
240	+	srp->msr = mrp->msr();
241	+	srp->xer = mrp->xer();
242	+	srp->ccr = mrp->cr();
243	+	for (int i = 0; i < 32; i++)
244	+	srp->gpr[i] = mrp->gpr(i);
245	+	}
246	+
247	+	static struct sigaltstack sig_stacks[SIG_STACK_COUNT];  // Stacks for signal handlers
248	+	static int sig_stack_id = 0;                                                    // Stack slot currently used
249	+
250	+	static inline void sig_stack_acquire(void)
251	+	{
252	+	if (++sig_stack_id == SIG_STACK_COUNT) {
253	+	printf("FATAL: signal stack overflow\n");
254	+	return;
255	+	}
256	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
257	+	}
258	+
259	+	static inline void sig_stack_release(void)
260	+	{
261	+	if (--sig_stack_id < 0) {
262	+	printf("FATAL: signal stack underflow\n");
263	+	return;
264	+	}
265	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
266	+	}
267	+	#endif
268	+
269
270		// Global variables (exported)
271		#if !EMULATED_PPC
#	Line 172 | Line 273 | void *TOC;                             // Small data pointer (r13
273		#endif
274		uint32 RAMBase;                 // Base address of Mac RAM
275		uint32 RAMSize;                 // Size of Mac RAM
175	–	uint32 SheepStack1Base; // SheepShaver first alternate stack base
176	–	uint32 SheepStack2Base; // SheepShaver second alternate stack base
177	–	uint32 SheepThunksBase; // SheepShaver thunks base
276		uint32 KernelDataAddr;  // Address of Kernel Data
277		uint32 BootGlobsAddr;   // Address of BootGlobs structure at top of Mac RAM
278	+	uint32 DRCacheAddr;             // Address of DR Cache
279		uint32 PVR;                             // Theoretical PVR
280		int64 CPUClockSpeed;    // Processor clock speed (Hz)
281		int64 BusClockSpeed;    // Bus clock speed (Hz)
282	+	int64 TimebaseSpeed;    // Timebase clock speed (Hz)
283
284
285		// Global variables
286	<	static char *x_display_name = NULL;                     // X11 display name
286	>	#ifndef USE_SDL_VIDEO
287	>	char *x_display_name = NULL;                            // X11 display name
288		Display *x_display = NULL;                                      // X11 display handle
289	+	#ifdef X11_LOCK_TYPE
290	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
291	+	#endif
292	+	#endif
293
294		static int zero_fd = 0;                                         // FD of /dev/zero
190	–	static bool sheep_area_mapped = false;          // Flag: SheepShaver data area mmap()ed
295		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
296		static int kernel_area = -1;                            // SHM ID of Kernel Data area
297		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
298		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
299	+	static bool dr_cache_area_mapped = false;       // Flag: Mac DR Cache mmap()ped
300	+	static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
301		static KernelData *kernel_data;                         // Pointer to Kernel Data
302		static EmulatorData *emulator_data;
303
304		static uint8 last_xpram[XPRAM_SIZE];            // Buffer for monitoring XPRAM changes
305
306		static bool nvram_thread_active = false;        // Flag: NVRAM watchdog installed
307	+	static volatile bool nvram_thread_cancel;       // Flag: Cancel NVRAM thread
308		static pthread_t nvram_thread;                          // NVRAM watchdog
309		static bool tick_thread_active = false;         // Flag: MacOS thread installed
310	+	static volatile bool tick_thread_cancel;        // Flag: Cancel 60Hz thread
311		static pthread_t tick_thread;                           // 60Hz thread
312		static pthread_t emul_thread;                           // MacOS thread
313
#	Line 207 | Line 315 | static bool ready_for_signals = false;
315		static int64 num_segv = 0;                                      // Number of handled SEGV signals
316
317		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
318	<	#if !EMULATED_PPC
318	>	#if EMULATED_PPC
319	>	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
320	>	#else
321		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
322		static struct sigaction sigill_action;          // Illegal instruction signal (of emulator thread)
213	–	static void *sig_stack = NULL;                          // Stack for signal handlers
214	–	static void *extra_stack = NULL;                        // Stack for SIGSEGV inside interrupt handler
323		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
324		static sigregs sigsegv_regs;                            // Register dump when crashed
325	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
326		#endif
327
328	+	uint32  SheepMem::page_size;                            // Size of a native page
329	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
330	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
331	+	uintptr SheepMem::top = 0;                                      // Top of SheepShaver data (stack like storage)
332	+
333
334		// Prototypes
335		static void Quit(void);
#	Line 223 | Line 337 | static void *emul_func(void *arg);
337		static void *nvram_func(void *arg);
338		static void *tick_func(void *arg);
339		#if EMULATED_PPC
340	<	static void sigusr2_handler(int sig);
340	>	extern void emul_ppc(uint32 start);
341	>	extern void init_emul_ppc(void);
342	>	extern void exit_emul_ppc(void);
343	>	sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
344		#else
345	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
346	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
347	<	static void sigill_handler(int sig, sigcontext_struct *sc);
345	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
346	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
347	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
348		#endif
349
350
351		// From asm_linux.S
352	<	#if EMULATED_PPC
236	<	extern int atomic_add(int *var, int v);
237	<	extern int atomic_and(int *var, int v);
238	<	extern int atomic_or(int *var, int v);
239	<	#else
352	>	#if !EMULATED_PPC
353		extern "C" void *get_toc(void);
354		extern "C" void *get_sp(void);
355		extern "C" void flush_icache_range(void *start, void *end);
#	Line 251 | Line 364 | extern void paranoia_check(void);
364		#endif
365
366
367	+	#if EMULATED_PPC
368	+	/*
369	+	*  Return signal stack base
370	+	*/
371	+
372	+	uintptr SignalStackBase(void)
373	+	{
374	+	return sig_stack + SIG_STACK_SIZE;
375	+	}
376	+
377	+
378	+	/*
379	+	*  Atomic operations
380	+	*/
381	+
382	+	#if HAVE_SPINLOCKS
383	+	static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED;
384	+	#else
385	+	#define spin_lock(LOCK)
386	+	#define spin_unlock(LOCK)
387	+	#endif
388	+
389	+	int atomic_add(int *var, int v)
390	+	{
391	+	spin_lock(&atomic_ops_lock);
392	+	int ret = *var;
393	+	*var += v;
394	+	spin_unlock(&atomic_ops_lock);
395	+	return ret;
396	+	}
397	+
398	+	int atomic_and(int *var, int v)
399	+	{
400	+	spin_lock(&atomic_ops_lock);
401	+	int ret = *var;
402	+	*var &= v;
403	+	spin_unlock(&atomic_ops_lock);
404	+	return ret;
405	+	}
406	+
407	+	int atomic_or(int *var, int v)
408	+	{
409	+	spin_lock(&atomic_ops_lock);
410	+	int ret = *var;
411	+	*var |= v;
412	+	spin_unlock(&atomic_ops_lock);
413	+	return ret;
414	+	}
415	+	#endif
416	+
417	+
418		/*
419		*  Main program
420		*/
#	Line 269 | Line 433 | int main(int argc, char **argv)
433		char str[256];
434		uint32 *boot_globs;
435		int16 i16;
272	–	int drive, driver;
436		int rom_fd;
437		FILE *proc_file;
438		const char *rom_path;
#	Line 303 | Line 466 | int main(int argc, char **argv)
466		for (int i=1; i<argc; i++) {
467		if (strcmp(argv[i], "--help") == 0) {
468		usage(argv[0]);
469	+	#ifndef USE_SDL_VIDEO
470		} else if (strcmp(argv[i], "--display") == 0) {
471		i++;
472		if (i < argc)
473		x_display_name = strdup(argv[i]);
474	+	#endif
475		} else if (argv[i][0] == '-') {
476		fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
477		usage(argv[0]);
478		}
479		}
480
481	+	#ifdef USE_SDL
482	+	// Initialize SDL system
483	+	int sdl_flags = 0;
484	+	#ifdef USE_SDL_VIDEO
485	+	sdl_flags |= SDL_INIT_VIDEO;
486	+	#endif
487	+	assert(sdl_flags != 0);
488	+	if (SDL_Init(sdl_flags) == -1) {
489	+	char str[256];
490	+	sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
491	+	ErrorAlert(str);
492	+	goto quit;
493	+	}
494	+	atexit(SDL_Quit);
495	+	#endif
496	+
497	+	#ifndef USE_SDL_VIDEO
498		// Open display
499		x_display = XOpenDisplay(x_display_name);
500		if (x_display == NULL) {
#	Line 326 | Line 508 | int main(int argc, char **argv)
508		// Fork out, so we can return from fullscreen mode when things get ugly
509		XF86DGAForkApp(DefaultScreen(x_display));
510		#endif
511	+	#endif
512
513		#ifdef ENABLE_MON
514		// Initialize mon
515		mon_init();
516		#endif
517
518	+	#if !EMULATED_PPC
519	+	// Create and install stacks for signal handlers
520	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
521	+	void *sig_stack = malloc(SIG_STACK_SIZE);
522	+	D(bug("Signal stack %d at %p\n", i, sig_stack));
523	+	if (sig_stack == NULL) {
524	+	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
525	+	goto quit;
526	+	}
527	+	sig_stacks[i].ss_sp = sig_stack;
528	+	sig_stacks[i].ss_flags = 0;
529	+	sig_stacks[i].ss_size = SIG_STACK_SIZE;
530	+	}
531	+	sig_stack_id = 0;
532	+	if (sigaltstack(&sig_stacks[0], NULL) < 0) {
533	+	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
534	+	ErrorAlert(str);
535	+	goto quit;
536	+	}
537	+	#endif
538	+
539	+	#if !EMULATED_PPC
540	+	// Install SIGSEGV and SIGBUS handlers
541	+	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
542	+	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
543	+	sigsegv_action.sa_sigaction = sigsegv_handler;
544	+	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
545	+	#ifdef HAVE_SIGNAL_SA_RESTORER
546	+	sigsegv_action.sa_restorer = NULL;
547	+	#endif
548	+	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
549	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
550	+	ErrorAlert(str);
551	+	goto quit;
552	+	}
553	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
554	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
555	+	ErrorAlert(str);
556	+	goto quit;
557	+	}
558	+	#else
559	+	// Install SIGSEGV handler for CPU emulator
560	+	if (!sigsegv_install_handler(sigsegv_handler)) {
561	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
562	+	ErrorAlert(str);
563	+	goto quit;
564	+	}
565	+	#endif
566	+
567	+	// Initialize VM system
568	+	vm_init();
569	+
570		// Get system info
571		PVR = 0x00040000;                       // Default: 604
572		CPUClockSpeed = 100000000;      // Default: 100MHz
573		BusClockSpeed = 100000000;      // Default: 100MHz
574	<	#if !EMULATED_PPC
574	>	TimebaseSpeed =  25000000;      // Default:  25MHz
575	>	#if EMULATED_PPC
576	>	PVR = 0x000c0000;                       // Default: 7400 (with AltiVec)
577	>	#elif defined(__APPLE__) && defined(__MACH__)
578	>	proc_file = popen("ioreg -c IOPlatformDevice", "r");
579	>	if (proc_file) {
580	>	char line[256];
581	>	bool powerpc_node = false;
582	>	while (fgets(line, sizeof(line) - 1, proc_file)) {
583	>	// Read line
584	>	int len = strlen(line);
585	>	if (len == 0)
586	>	continue;
587	>	line[len - 1] = 0;
588	>
589	>	// Parse line
590	>	if (strstr(line, "o PowerPC,"))
591	>	powerpc_node = true;
592	>	else if (powerpc_node) {
593	>	uint32 value;
594	>	char head[256];
595	>	if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
596	>	PVR = value;
597	>	else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
598	>	CPUClockSpeed = value;
599	>	else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
600	>	BusClockSpeed = value;
601	>	else if (sscanf(line, "%[ |]\"timebase-frequency\" = <%x>", head, &value) == 2)
602	>	TimebaseSpeed = value;
603	>	else if (strchr(line, '}'))
604	>	powerpc_node = false;
605	>	}
606	>	}
607	>	fclose(proc_file);
608	>	} else {
609	>	sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
610	>	WarningAlert(str);
611	>	}
612	>	#else
613		proc_file = fopen("/proc/cpuinfo", "r");
614		if (proc_file) {
615		char line[256];
#	Line 350 | Line 623 | int main(int argc, char **argv)
623		// Parse line
624		int i;
625		char value[256];
626	<	if (sscanf(line, "cpu : %s", value) == 1) {
626	>	if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
627		if (strcmp(value, "601") == 0)
628		PVR = 0x00010000;
629		else if (strcmp(value, "603") == 0)
#	Line 367 | Line 640 | int main(int argc, char **argv)
640		PVR = 0x000a0000;
641		else if (strcmp(value, "750") == 0)
642		PVR = 0x00080000;
643	+	else if (strcmp(value, "750FX") == 0)
644	+	PVR = 0x70000000;
645		else if (strcmp(value, "821") == 0)
646		PVR = 0x00320000;
647		else if (strcmp(value, "860") == 0)
648		PVR = 0x00500000;
649	+	else if (strcmp(value, "7400") == 0)
650	+	PVR = 0x000c0000;
651	+	else if (strcmp(value, "7410") == 0)
652	+	PVR = 0x800c0000;
653	+	else if (strcmp(value, "7450") == 0)
654	+	PVR = 0x80000000;
655	+	else if (strcmp(value, "7455") == 0)
656	+	PVR = 0x80010000;
657	+	else if (strcmp(value, "7457") == 0)
658	+	PVR = 0x80020000;
659	+	else if (strcmp(value, "PPC970") == 0)
660	+	PVR = 0x00390000;
661		else
662		printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
663		}
#	Line 382 | Line 669 | int main(int argc, char **argv)
669		sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
670		WarningAlert(str);
671		}
672	+
673	+	// Get actual bus frequency
674	+	proc_file = fopen("/proc/device-tree/clock-frequency", "r");
675	+	if (proc_file) {
676	+	union { uint8 b[4]; uint32 l; } value;
677	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
678	+	BusClockSpeed = value.l;
679	+	fclose(proc_file);
680	+	}
681	+
682	+	// Get actual timebase frequency
683	+	TimebaseSpeed = BusClockSpeed / 4;
684	+	DIR *cpus_dir;
685	+	if ((cpus_dir = opendir("/proc/device-tree/cpus")) != NULL) {
686	+	struct dirent *cpu_entry;
687	+	while ((cpu_entry = readdir(cpus_dir)) != NULL) {
688	+	if (strstr(cpu_entry->d_name, "PowerPC,") == cpu_entry->d_name) {
689	+	char timebase_freq_node[256];
690	+	sprintf(timebase_freq_node, "/proc/device-tree/cpus/%s/timebase-frequency", cpu_entry->d_name);
691	+	proc_file = fopen(timebase_freq_node, "r");
692	+	if (proc_file) {
693	+	union { uint8 b[4]; uint32 l; } value;
694	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
695	+	TimebaseSpeed = value.l;
696	+	fclose(proc_file);
697	+	}
698	+	}
699	+	}
700	+	closedir(cpus_dir);
701	+	}
702		#endif
703	+	// Remap any newer G4/G5 processor to plain G4 for compatibility
704	+	switch (PVR >> 16) {
705	+	case 0x8000:                            // 7450
706	+	case 0x8001:                            // 7455
707	+	case 0x8002:                            // 7457
708	+	case 0x0039:                            //  970
709	+	PVR = 0x000c0000;               // 7400
710	+	break;
711	+	}
712		D(bug("PVR: %08x (assumed)\n", PVR));
713
714		// Init system routines
#	Line 406 | Line 732 | int main(int argc, char **argv)
732		goto quit;
733		}
734
735	+	#ifndef PAGEZERO_HACK
736		// Create Low Memory area (0x0000..0x3000)
737		if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
738		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
#	Line 413 | Line 740 | int main(int argc, char **argv)
740		goto quit;
741		}
742		lm_area_mapped = true;
743	+	#endif
744
745		// Create areas for Kernel Data
746		kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
#	Line 431 | Line 759 | int main(int argc, char **argv)
759		ErrorAlert(str);
760		goto quit;
761		}
762	<	kernel_data = (KernelData *)0x68ffe000;
762	>	kernel_data = (KernelData *)KERNEL_DATA_BASE;
763		emulator_data = &kernel_data->ed;
764	<	KernelDataAddr = (uint32)kernel_data;
764	>	KernelDataAddr = KERNEL_DATA_BASE;
765		D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
766
767	+	// Create area for DR Cache
768	+	if (vm_acquire_fixed((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
769	+	sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
770	+	ErrorAlert(str);
771	+	goto quit;
772	+	}
773	+	dr_emulator_area_mapped = true;
774	+	if (vm_acquire_fixed((void *)DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
775	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
776	+	ErrorAlert(str);
777	+	goto quit;
778	+	}
779	+	dr_cache_area_mapped = true;
780	+	#if !EMULATED_PPC
781	+	if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
782	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
783	+	ErrorAlert(str);
784	+	goto quit;
785	+	}
786	+	#endif
787	+	DRCacheAddr = DR_CACHE_BASE;
788	+	D(bug("DR Cache at %p\n", DRCacheAddr));
789	+
790		// Create area for SheepShaver data
791	<	if (vm_acquire_fixed((char *)SHEEP_BASE, SHEEP_SIZE) < 0) {
791	>	if (!SheepMem::Init()) {
792		sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
793		ErrorAlert(str);
794		goto quit;
795		}
445	–	SheepStack1Base = SHEEP_BASE + 0x10000;
446	–	SheepStack2Base = SheepStack1Base + 0x10000;
447	–	SheepThunksBase = SheepStack2Base + 0x1000;
448	–	sheep_area_mapped = true;
796
797		// Create area for Mac ROM
798		if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
#	Line 453 | Line 800 | int main(int argc, char **argv)
800		ErrorAlert(str);
801		goto quit;
802		}
803	<	#if !EMULATED_PPC || defined(__powerpc__)
803	>	#if !EMULATED_PPC
804		if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
805		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
806		ErrorAlert(str);
#	Line 523 | Line 870 | int main(int argc, char **argv)
870		// Load NVRAM
871		XPRAMInit();
872
873	+	// Load XPRAM default values if signature not found
874	+	if (XPRAM[0x130c] != 0x4e || XPRAM[0x130d] != 0x75
875	+	|| XPRAM[0x130e] != 0x4d || XPRAM[0x130f] != 0x63) {
876	+	D(bug("Loading XPRAM default values\n"));
877	+	memset(XPRAM + 0x1300, 0, 0x100);
878	+	XPRAM[0x130c] = 0x4e;   // "NuMc" signature
879	+	XPRAM[0x130d] = 0x75;
880	+	XPRAM[0x130e] = 0x4d;
881	+	XPRAM[0x130f] = 0x63;
882	+	XPRAM[0x1301] = 0x80;   // InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
883	+	XPRAM[0x1310] = 0xa8;   // Standard PRAM values
884	+	XPRAM[0x1311] = 0x00;
885	+	XPRAM[0x1312] = 0x00;
886	+	XPRAM[0x1313] = 0x22;
887	+	XPRAM[0x1314] = 0xcc;
888	+	XPRAM[0x1315] = 0x0a;
889	+	XPRAM[0x1316] = 0xcc;
890	+	XPRAM[0x1317] = 0x0a;
891	+	XPRAM[0x131c] = 0x00;
892	+	XPRAM[0x131d] = 0x02;
893	+	XPRAM[0x131e] = 0x63;
894	+	XPRAM[0x131f] = 0x00;
895	+	XPRAM[0x1308] = 0x13;
896	+	XPRAM[0x1309] = 0x88;
897	+	XPRAM[0x130a] = 0x00;
898	+	XPRAM[0x130b] = 0xcc;
899	+	XPRAM[0x1376] = 0x00;   // OSDefault = MacOS
900	+	XPRAM[0x1377] = 0x01;
901	+	}
902	+
903		// Set boot volume
904	<	drive = PrefsFindInt32("bootdrive");
904	>	i16 = PrefsFindInt32("bootdrive");
905		XPRAM[0x1378] = i16 >> 8;
906		XPRAM[0x1379] = i16 & 0xff;
907	<	driver = PrefsFindInt32("bootdriver");
907	>	i16 = PrefsFindInt32("bootdriver");
908		XPRAM[0x137a] = i16 >> 8;
909		XPRAM[0x137b] = i16 & 0xff;
910
#	Line 540 | Line 917 | int main(int argc, char **argv)
917		boot_globs[1] = htonl(RAMSize);
918		boot_globs[2] = htonl((uint32)-1);                      // End of bank table
919
920	+	// Init thunks
921	+	if (!ThunksInit())
922	+	goto quit;
923	+
924		// Init drivers
925		SonyInit();
926		DiskInit();
#	Line 549 | Line 930 | int main(int argc, char **argv)
930		// Init external file system
931		ExtFSInit();
932
933	+	// Init ADB
934	+	ADBInit();
935	+
936		// Init audio
937		AudioInit();
938
#	Line 583 | Line 967 | int main(int argc, char **argv)
967		// Initialize Kernel Data
968		memset(kernel_data, 0, sizeof(KernelData));
969		if (ROMType == ROMTYPE_NEWWORLD) {
970	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
971	<	static uint8 vector_lookup_tbl[128];
972	<	static uint8 vector_mask_tbl[64];
970	>	uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
971	>	memset((void *)of_dev_tree, 0, 4 * sizeof(uint32));
972	>	uintptr vector_lookup_tbl = SheepMem::Reserve(128);
973	>	uintptr vector_mask_tbl = SheepMem::Reserve(64);
974		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
975	<	memset(vector_lookup_tbl, 0, 128);
976	<	memset(vector_mask_tbl, 0, 64);
975	>	memset((void *)vector_lookup_tbl, 0, 128);
976	>	memset((void *)vector_mask_tbl, 0, 64);
977		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
978	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
979	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
980	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
978	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree);                        // OF device tree base
979	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
980	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
981		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
982		kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
983		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 605 | Line 990 | int main(int argc, char **argv)
990		kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
991		kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
992		kernel_data->v[0xf60 >> 2] = htonl(PVR);
993	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
994	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
995	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
993	>	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
994	>	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
995	>	kernel_data->v[0xf6c >> 2] = htonl(TimebaseSpeed);                      // timebase-frequency
996		} else {
997		kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
998		kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
#	Line 619 | Line 1004 | int main(int argc, char **argv)
1004		kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
1005		kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
1006		kernel_data->v[0xf80 >> 2] = htonl(PVR);
1007	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
1008	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
1009	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
1007	>	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
1008	>	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
1009	>	kernel_data->v[0xf8c >> 2] = htonl(TimebaseSpeed);                      // timebase-frequency
1010		}
1011
1012		// Initialize extra low memory
1013		D(bug("Initializing Low Memory...\n"));
1014		memset(NULL, 0, 0x3000);
1015		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
1016	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
1016	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr);                                 // For trap replacement routines
1017		WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
1018		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
1019		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
1020	<	#if EMULATED_PPC
1021	<	WriteMacInt32(XLM_ETHER_INIT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_INIT));
1022	<	WriteMacInt32(XLM_ETHER_TERM, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_TERM));
638	<	WriteMacInt32(XLM_ETHER_OPEN, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_OPEN));
639	<	WriteMacInt32(XLM_ETHER_CLOSE, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_CLOSE));
640	<	WriteMacInt32(XLM_ETHER_WPUT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_WPUT));
641	<	WriteMacInt32(XLM_ETHER_RSRV, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_RSRV));
642	<	WriteMacInt32(XLM_VIDEO_DOIO, POWERPC_NATIVE_OP_FUNC(NATIVE_VIDEO_DO_DRIVER_IO));
643	<	#else
644	<	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                    // TOC pointer of emulator
645	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule);                // DLPI ethernet driver functions
646	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
647	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
648	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
649	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
650	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
651	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
1020	>	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage());                             // Pointer to read-only page with all bits set to 0
1021	>	#if !EMULATED_PPC
1022	>	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                            // TOC pointer of emulator
1023		#endif
1024	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT));       // DLPI ethernet driver functions
1025	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
1026	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
1027	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
1028	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
1029	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
1030	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
1031		D(bug("Low Memory initialized\n"));
1032
1033		// Start 60Hz thread
1034	+	tick_thread_cancel = false;
1035		tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
1036		D(bug("Tick thread installed (%ld)\n", tick_thread));
1037
1038		// Start NVRAM watchdog thread
1039		memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1040	+	nvram_thread_cancel = false;
1041		nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
1042		D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
1043
1044		#if !EMULATED_PPC
665	–	// Create and install stacks for signal handlers
666	–	sig_stack = malloc(SIG_STACK_SIZE);
667	–	D(bug("Signal stack at %p\n", sig_stack));
668	–	if (sig_stack == NULL) {
669	–	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
670	–	goto quit;
671	–	}
672	–	extra_stack = malloc(SIG_STACK_SIZE);
673	–	D(bug("Extra stack at %p\n", extra_stack));
674	–	if (extra_stack == NULL) {
675	–	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
676	–	goto quit;
677	–	}
678	–	struct sigaltstack new_stack;
679	–	new_stack.ss_sp = sig_stack;
680	–	new_stack.ss_flags = 0;
681	–	new_stack.ss_size = SIG_STACK_SIZE;
682	–	if (sigaltstack(&new_stack, NULL) < 0) {
683	–	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
684	–	ErrorAlert(str);
685	–	goto quit;
686	–	}
687	–	#endif
688	–
689	–	#if !EMULATED_PPC
690	–	// Install SIGSEGV handler
691	–	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
692	–	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
693	–	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
694	–	sigsegv_action.sa_flags = SA_ONSTACK;
695	–	sigsegv_action.sa_restorer = NULL;
696	–	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
697	–	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
698	–	ErrorAlert(str);
699	–	goto quit;
700	–	}
701	–
1045		// Install SIGILL handler
1046		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
1047		sigaddset(&sigill_action.sa_mask, SIGUSR2);
1048	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
1049	<	sigill_action.sa_flags = SA_ONSTACK;
1048	>	sigill_action.sa_sigaction = sigill_handler;
1049	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
1050	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1051		sigill_action.sa_restorer = NULL;
1052	+	#endif
1053		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
1054		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
1055		ErrorAlert(str);
#	Line 712 | Line 1057 | int main(int argc, char **argv)
1057		}
1058		#endif
1059
1060	+	#if !EMULATED_PPC
1061		// Install interrupt signal handler
1062		sigemptyset(&sigusr2_action.sa_mask);
1063	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
1064	<	sigusr2_action.sa_flags = 0;
1065	<	#if !EMULATED_PPC
720	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
721	<	#endif
1063	>	sigusr2_action.sa_sigaction = sigusr2_handler;
1064	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
1065	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1066		sigusr2_action.sa_restorer = NULL;
1067	+	#endif
1068		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
1069		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
1070		ErrorAlert(str);
1071		goto quit;
1072		}
1073	+	#endif
1074
1075		// Get my thread ID and execute MacOS thread function
1076		emul_thread = pthread_self();
#	Line 743 | Line 1089 | quit:
1089
1090		static void Quit(void)
1091		{
1092	+	#if EMULATED_PPC
1093	+	// Exit PowerPC emulation
1094	+	exit_emul_ppc();
1095	+	#endif
1096	+
1097		// Stop 60Hz thread
1098		if (tick_thread_active) {
1099	+	tick_thread_cancel = true;
1100		pthread_cancel(tick_thread);
1101		pthread_join(tick_thread, NULL);
1102		}
1103
1104		// Stop NVRAM watchdog thread
1105		if (nvram_thread_active) {
1106	+	nvram_thread_cancel = true;
1107		pthread_cancel(nvram_thread);
1108		pthread_join(nvram_thread, NULL);
1109		}
1110
1111		#if !EMULATED_PPC
1112	<	// Uninstall SIGSEGV handler
1112	>	// Uninstall SIGSEGV and SIGBUS handlers
1113		sigemptyset(&sigsegv_action.sa_mask);
1114		sigsegv_action.sa_handler = SIG_DFL;
1115		sigsegv_action.sa_flags = 0;
1116		sigaction(SIGSEGV, &sigsegv_action, NULL);
1117	+	sigaction(SIGBUS, &sigsegv_action, NULL);
1118
1119		// Uninstall SIGILL handler
1120		sigemptyset(&sigill_action.sa_mask);
1121		sigill_action.sa_handler = SIG_DFL;
1122		sigill_action.sa_flags = 0;
1123		sigaction(SIGILL, &sigill_action, NULL);
1124	+
1125	+	// Delete stacks for signal handlers
1126	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
1127	+	void *sig_stack = sig_stacks[i].ss_sp;
1128	+	if (sig_stack)
1129	+	free(sig_stack);
1130	+	}
1131		#endif
1132
1133		// Save NVRAM
#	Line 787 | Line 1148 | static void Quit(void)
1148		// Exit audio
1149		AudioExit();
1150
1151	+	// Exit ADB
1152	+	ADBExit();
1153	+
1154		// Exit video
1155		VideoExit();
1156
#	Line 799 | Line 1163 | static void Quit(void)
1163		DiskExit();
1164		SonyExit();
1165
1166	+	// Delete thunks
1167	+	ThunksExit();
1168	+
1169	+	// Delete SheepShaver globals
1170	+	SheepMem::Exit();
1171	+
1172		// Delete RAM area
1173		if (ram_area_mapped)
1174		vm_release((char *)RAM_BASE, RAMSize);
#	Line 807 | Line 1177 | static void Quit(void)
1177		if (rom_area_mapped)
1178		vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1179
1180	+	// Delete DR cache areas
1181	+	if (dr_emulator_area_mapped)
1182	+	vm_release((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1183	+	if (dr_cache_area_mapped)
1184	+	vm_release((void *)DR_CACHE_BASE, DR_CACHE_SIZE);
1185	+
1186		// Delete Kernel Data area
1187		if (kernel_area >= 0) {
1188		shmdt((void *)KERNEL_DATA_BASE);
#	Line 834 | Line 1210 | static void Quit(void)
1210		#endif
1211
1212		// Close X11 server connection
1213	+	#ifndef USE_SDL_VIDEO
1214		if (x_display)
1215		XCloseDisplay(x_display);
1216	+	#endif
1217
1218		exit(0);
1219		}
#	Line 846 | Line 1224 | static void Quit(void)
1224		*/
1225
1226		#if EMULATED_PPC
849	–	extern void emul_ppc(uint32 start);
850	–	extern void init_emul_ppc(void);
1227		void jump_to_rom(uint32 entry)
1228		{
1229		init_emul_ppc();
#	Line 912 | Line 1288 | void Execute68kTrap(uint16 trap, M68kReg
1288		uint16 proc[2] = {trap, M68K_RTS};
1289		Execute68k((uint32)proc, r);
1290		}
915	–
916	–
917	–	/*
918	–	*  Execute PPC code from EMUL_OP routine (real mode switch)
919	–	*/
920	–
921	–	void ExecutePPC(void (*func)())
922	–	{
923	–	uint32 tvect[2] = {(uint32)func, 0};    // Fake TVECT
924	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
925	–	M68kRegisters r;
926	–	Execute68k((uint32)&desc, &r);
927	–	}
1291		#endif
1292
1293
#	Line 987 | Line 1350 | void Dump68kRegs(M68kRegisters *r)
1350
1351		void MakeExecutable(int dummy, void *start, uint32 length)
1352		{
1353	<	#if !EMULATED_PPC
991	<	if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE)))
1353	>	if (((uintptr)start >= ROM_BASE) && ((uintptr)start < (ROM_BASE + ROM_SIZE)))
1354		return;
1355	<	flush_icache_range(start, (void *)((uint32)start + length));
1355	>	#if EMULATED_PPC
1356	>	FlushCodeCache((uintptr)start, (uintptr)start + length);
1357	>	#else
1358	>	flush_icache_range(start, (void *)((uintptr)start + length));
1359		#endif
1360		}
1361
#	Line 1001 | Line 1366 | void MakeExecutable(int dummy, void *sta
1366
1367		void PatchAfterStartup(void)
1368		{
1004	–	#if EMULATED_PPC
1369		ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1006	–	#else
1007	–	ExecutePPC(VideoInstallAccel);
1008	–	#endif
1370		InstallExtFS();
1371		}
1372
#	Line 1014 | Line 1375 | void PatchAfterStartup(void)
1375		*  NVRAM watchdog thread (saves NVRAM every minute)
1376		*/
1377
1378	<	static void *nvram_func(void *arg)
1378	>	static void nvram_watchdog(void)
1379		{
1380	<	struct timespec req = {60, 0};  // 1 minute
1380	>	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1381	>	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1382	>	SaveXPRAM();
1383	>	}
1384	>	}
1385
1386	<	for (;;) {
1387	<	pthread_testcancel();
1388	<	nanosleep(&req, NULL);
1389	<	pthread_testcancel();
1390	<	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1391	<	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1027	<	SaveXPRAM();
1028	<	}
1386	>	static void *nvram_func(void *arg)
1387	>	{
1388	>	while (!nvram_thread_cancel) {
1389	>	for (int i=0; i<60 && !nvram_thread_cancel; i++)
1390	>	Delay_usec(999999);             // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1391	>	nvram_watchdog();
1392		}
1393		return NULL;
1394		}
#	Line 1038 | Line 1401 | static void *nvram_func(void *arg)
1401		static void *tick_func(void *arg)
1402		{
1403		int tick_counter = 0;
1404	<	struct timespec req = {0, 16625000};
1404	>	uint64 start = GetTicks_usec();
1405	>	int64 ticks = 0;
1406	>	uint64 next = GetTicks_usec();
1407
1408	<	for (;;) {
1408	>	while (!tick_thread_cancel) {
1409
1410		// Wait
1411	<	nanosleep(&req, NULL);
1411	>	next += 16625;
1412	>	int64 delay = next - GetTicks_usec();
1413	>	if (delay > 0)
1414	>	Delay_usec(delay);
1415	>	else if (delay < -16625)
1416	>	next = GetTicks_usec();
1417	>	ticks++;
1418
1419		#if !EMULATED_PPC
1420		// Did we crash?
1421		if (emul_thread_fatal) {
1422
1423		// Yes, dump registers
1424	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1424	>	sigregs *r = &sigsegv_regs;
1425		char str[256];
1426	<	sprintf(str, "SIGSEGV\n"
1426	>	if (crash_reason == NULL)
1427	>	crash_reason = "SIGSEGV";
1428	>	sprintf(str, "%s\n"
1429		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1430		"  xer %08lx     cr %08lx  \n"
1431		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1063 | Line 1436 | static void *tick_func(void *arg)
1436		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1437		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1438		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1439	+	crash_reason,
1440		r->nip, r->link, r->ctr, r->msr,
1441		r->xer, r->ccr,
1442		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1098 | Line 1472 | static void *tick_func(void *arg)
1472		TriggerInterrupt();
1473		}
1474		}
1475	+
1476	+	uint64 end = GetTicks_usec();
1477	+	D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1478		return NULL;
1479		}
1480
#	Line 1108 | Line 1485 | static void *tick_func(void *arg)
1485
1486		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1487		{
1488	<	// nothing to do
1488	>	#ifdef HAVE_PTHREADS
1489	>	pthread_attr_init(attr);
1490	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1491	>	// Some of these only work for superuser
1492	>	if (geteuid() == 0) {
1493	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1494	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1495	>	struct sched_param fifo_param;
1496	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1497	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1498	>	priority);
1499	>	pthread_attr_setschedparam(attr, &fifo_param);
1500	>	}
1501	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1502	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1503	>	// If system scope is not available (eg. we're not running
1504	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1505	>	// scope.  It exposes pthread scheduling to the kernel,
1506	>	// without setting realtime priority.
1507	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1508	>	#endif
1509	>	}
1510	>	#endif
1511	>	#endif
1512		}
1513
1514
#	Line 1195 | Line 1595 | void B2_delete_mutex(B2_mutex *mutex)
1595		*  Trigger signal USR2 from another thread
1596		*/
1597
1598	<	#if !EMULATED_PPC || ASYNC_IRQ
1598	>	#if !EMULATED_PPC
1599		void TriggerInterrupt(void)
1600		{
1601		if (ready_for_signals)
#	Line 1227 | Line 1627 | void ClearInterruptFlag(uint32 flag)
1627
1628		void DisableInterrupt(void)
1629		{
1630	+	#if EMULATED_PPC
1631	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1632	+	#else
1633		atomic_add((int *)XLM_IRQ_NEST, 1);
1634	+	#endif
1635		}
1636
1637
#	Line 1237 | Line 1641 | void DisableInterrupt(void)
1641
1642		void EnableInterrupt(void)
1643		{
1644	+	#if EMULATED_PPC
1645	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1646	+	#else
1647		atomic_add((int *)XLM_IRQ_NEST, -1);
1648	+	#endif
1649		}
1650
1651
#	Line 1245 | Line 1653 | void EnableInterrupt(void)
1653		*  USR2 handler
1654		*/
1655
1656	<	#if EMULATED_PPC
1657	<	static void sigusr2_handler(int sig)
1656	>	#if !EMULATED_PPC
1657	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1658		{
1659	<	#if ASYNC_IRQ
1660	<	extern void HandleInterrupt(void);
1661	<	HandleInterrupt();
1659	>	machine_regs *r = MACHINE_REGISTERS(scp);
1660	>
1661	>	#ifdef USE_SDL_VIDEO
1662	>	// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
1663	>	SDL_PumpEvents();
1664		#endif
1255	–	}
1256	–	#else
1257	–	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1258	–	{
1259	–	pt_regs *r = sc->regs;
1665
1666		// Do nothing if interrupts are disabled
1667		if (*(int32 *)XLM_IRQ_NEST > 0)
#	Line 1270 | Line 1675 | static void sigusr2_handler(int sig, sig
1675		case MODE_68K:
1676		// 68k emulator active, trigger 68k interrupt level 1
1677		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1678	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1678	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1679		break;
1680
1681		#if INTERRUPTS_IN_NATIVE_MODE
1682		case MODE_NATIVE:
1683		// 68k emulator inactive, in nanokernel?
1684	<	if (r->gpr[1] != KernelDataAddr) {
1684	>	if (r->gpr(1) != KernelDataAddr) {
1685	>
1686	>	// Set extra stack for nested interrupts
1687	>	sig_stack_acquire();
1688	>
1689		// Prepare for 68k interrupt level 1
1690		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1691		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1692
1693		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1694	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1694	>	DisableInterrupt();
1695		if (ROMType == ROMTYPE_NEWWORLD)
1696		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1697		else
1698		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1699	+
1700	+	// Reset normal signal stack
1701	+	sig_stack_release();
1702		}
1703		break;
1704		#endif
#	Line 1297 | Line 1709 | static void sigusr2_handler(int sig, sig
1709		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1710
1711		// Set extra stack for SIGSEGV handler
1712	<	struct sigaltstack new_stack;
1301	<	new_stack.ss_sp = extra_stack;
1302	<	new_stack.ss_flags = 0;
1303	<	new_stack.ss_size = SIG_STACK_SIZE;
1304	<	sigaltstack(&new_stack, NULL);
1712	>	sig_stack_acquire();
1713		#if 1
1714		// Execute full 68k interrupt routine
1715		M68kRegisters r;
#	Line 1323 | Line 1731 | static void sigusr2_handler(int sig, sig
1731		if (InterruptFlags & INTFLAG_VIA) {
1732		ClearInterruptFlag(INTFLAG_VIA);
1733		ADBInterrupt();
1734	<	ExecutePPC(VideoVBL);
1734	>	ExecuteNative(NATIVE_VIDEO_VBL);
1735		}
1736		}
1737		#endif
1738		// Reset normal signal stack
1739	<	new_stack.ss_sp = sig_stack;
1332	<	new_stack.ss_flags = 0;
1333	<	new_stack.ss_size = SIG_STACK_SIZE;
1334	<	sigaltstack(&new_stack, NULL);
1739	>	sig_stack_release();
1740		}
1741		break;
1742		#endif
#	Line 1345 | Line 1750 | static void sigusr2_handler(int sig, sig
1750		*/
1751
1752		#if !EMULATED_PPC
1753	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1753	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1754		{
1755	<	pt_regs *r = sc->regs;
1755	>	machine_regs *r = MACHINE_REGISTERS(scp);
1756
1757		// Get effective address
1758	<	uint32 addr = r->dar;
1758	>	uint32 addr = r->dar();
1759
1760		#if ENABLE_VOSF
1761		// Handle screen fault.
1762		extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1763	<	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->nip))
1763	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1764		return;
1765		#endif
1766
1767		num_segv++;
1768
1769	<	// Fault in Mac ROM or RAM?
1770	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1769	>	// Fault in Mac ROM or RAM or DR Cache?
1770	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize)) || (r->pc() >= DR_CACHE_BASE && r->pc() < (DR_CACHE_BASE + DR_CACHE_SIZE));
1771		if (mac_fault) {
1772
1773		// "VM settings" during MacOS 8 installation
1774	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1775	<	r->nip += 4;
1776	<	r->gpr[8] = 0;
1774	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1775	>	r->pc() += 4;
1776	>	r->gpr(8) = 0;
1777		return;
1778
1779		// MacOS 8.5 installation
1780	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1781	<	r->nip += 4;
1782	<	r->gpr[8] = 0;
1780	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1781	>	r->pc() += 4;
1782	>	r->gpr(8) = 0;
1783		return;
1784
1785		// MacOS 8 serial drivers on startup
1786	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1787	<	r->nip += 4;
1788	<	r->gpr[8] = 0;
1786	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1787	>	r->pc() += 4;
1788	>	r->gpr(8) = 0;
1789		return;
1790
1791		// MacOS 8.1 serial drivers on startup
1792	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1793	<	r->nip += 4;
1792	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1793	>	r->pc() += 4;
1794		return;
1795	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1796	<	r->nip += 4;
1795	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1796	>	r->pc() += 4;
1797	>	return;
1798	>
1799	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1800	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1801	>	r->pc() += 4;
1802	>	return;
1803	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1804	>	r->pc() += 4;
1805		return;
1806		}
1807
1808		// Get opcode and divide into fields
1809	<	uint32 opcode = *((uint32 *)r->nip);
1809	>	uint32 opcode = *((uint32 *)r->pc());
1810		uint32 primop = opcode >> 26;
1811		uint32 exop = (opcode >> 1) & 0x3ff;
1812		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1482 | Line 1895 | static void sigsegv_handler(int sig, sig
1895		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1896		case 45:        // sthu
1897		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1898	+	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1899	+	case 46:        // lmw
1900	+	if ((addr % 4) != 0) {
1901	+	uint32 ea = addr;
1902	+	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1903	+	for (int i = rd; i <= 31; i++) {
1904	+	r->gpr(i) = ReadMacInt32(ea);
1905	+	ea += 4;
1906	+	}
1907	+	r->pc() += 4;
1908	+	goto rti;
1909	+	}
1910	+	break;
1911	+	case 47:        // stmw
1912	+	if ((addr % 4) != 0) {
1913	+	uint32 ea = addr;
1914	+	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1915	+	for (int i = rd; i <= 31; i++) {
1916	+	WriteMacInt32(ea, r->gpr(i));
1917	+	ea += 4;
1918	+	}
1919	+	r->pc() += 4;
1920	+	goto rti;
1921	+	}
1922	+	break;
1923	+	#endif
1924		}
1925
1926	<	// Ignore ROM writes
1927	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1928	<	//                      D(bug("WARNING: %s write access to ROM at %08lx, pc %08lx\n", transfer_size == SIZE_BYTE ? "Byte" : transfer_size == SIZE_HALFWORD ? "Halfword" : "Word", addr, r->nip));
1926	>	// Ignore ROM writes (including to the zero page, which is read-only)
1927	>	if (transfer_type == TYPE_STORE &&
1928	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
1929	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1930	>	//                      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()));
1931		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1932	<	r->gpr[ra] = addr;
1933	<	r->nip += 4;
1932	>	r->gpr(ra) = addr;
1933	>	r->pc() += 4;
1934		goto rti;
1935		}
1936
1937		// Ignore illegal memory accesses?
1938		if (PrefsFindBool("ignoresegv")) {
1939		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1940	<	r->gpr[ra] = addr;
1940	>	r->gpr(ra) = addr;
1941		if (transfer_type == TYPE_LOAD)
1942	<	r->gpr[rd] = 0;
1943	<	r->nip += 4;
1942	>	r->gpr(rd) = 0;
1943	>	r->pc() += 4;
1944		goto rti;
1945		}
1946
#	Line 1507 | Line 1948 | static void sigsegv_handler(int sig, sig
1948		if (!PrefsFindBool("nogui")) {
1949		char str[256];
1950		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1951	<	sprintf(str, GetString(STR_MEM_ACCESS_ERR), transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_HALFWORD ? "halfword" : "word", transfer_type == TYPE_LOAD ? GetString(STR_MEM_ACCESS_READ) : GetString(STR_MEM_ACCESS_WRITE), addr, r->nip, r->gpr[24], r->gpr[1]);
1951	>	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));
1952		else
1953	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1953	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1954		ErrorAlert(str);
1955		QuitEmulator();
1956		return;
#	Line 1517 | Line 1958 | static void sigsegv_handler(int sig, sig
1958		}
1959
1960		// For all other errors, jump into debugger (sort of...)
1961	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1962		if (!ready_for_signals) {
1963	<	printf("SIGSEGV\n");
1964	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1963	>	printf("%s\n");
1964	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1965		printf(
1966		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1967		"  xer %08lx     cr %08lx  \n"
#	Line 1531 | Line 1973 | static void sigsegv_handler(int sig, sig
1973		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1974		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1975		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1976	<	r->nip, r->link, r->ctr, r->msr,
1977	<	r->xer, r->ccr,
1978	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1979	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1980	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1981	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1982	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1983	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1984	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1985	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1976	>	crash_reason,
1977	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1978	>	r->xer(), r->cr(),
1979	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1980	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1981	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1982	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1983	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1984	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1985	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1986	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1987		exit(1);
1988		QuitEmulator();
1989		return;
1990		} else {
1991		// We crashed. Save registers, tell tick thread and loop forever
1992	<	sigsegv_regs = *(sigregs *)r;
1992	>	build_sigregs(&sigsegv_regs, r);
1993		emul_thread_fatal = true;
1994		for (;;) ;
1995		}
#	Line 1558 | Line 2001 | rti:;
2001		*  SIGILL handler
2002		*/
2003
2004	<	static void sigill_handler(int sig, sigcontext_struct *sc)
2004	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
2005		{
2006	<	pt_regs *r = sc->regs;
2006	>	machine_regs *r = MACHINE_REGISTERS(scp);
2007		char str[256];
2008
2009		// Fault in Mac ROM or RAM?
2010	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
2010	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
2011		if (mac_fault) {
2012
2013		// Get opcode and divide into fields
2014	<	uint32 opcode = *((uint32 *)r->nip);
2014	>	uint32 opcode = *((uint32 *)r->pc());
2015		uint32 primop = opcode >> 26;
2016		uint32 exop = (opcode >> 1) & 0x3ff;
2017		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1579 | Line 2022 | static void sigill_handler(int sig, sigc
2022		switch (primop) {
2023		case 9:         // POWER instructions
2024		case 22:
2025	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
2025	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
2026		ErrorAlert(str);
2027		QuitEmulator();
2028		return;
#	Line 1587 | Line 2030 | power_inst:            sprintf(str, GetString(STR_
2030		case 31:
2031		switch (exop) {
2032		case 83:        // mfmsr
2033	<	r->gpr[rd] = 0xf072;
2034	<	r->nip += 4;
2033	>	r->gpr(rd) = 0xf072;
2034	>	r->pc() += 4;
2035		goto rti;
2036
2037		case 210:       // mtsr
2038		case 242:       // mtsrin
2039		case 306:       // tlbie
2040	<	r->nip += 4;
2040	>	r->pc() += 4;
2041		goto rti;
2042
2043		case 339: {     // mfspr
#	Line 1610 | Line 2053 | power_inst:            sprintf(str, GetString(STR_
2053		case 957:       // PMC3
2054		case 958:       // PMC4
2055		case 959:       // SDA
2056	<	r->nip += 4;
2056	>	r->pc() += 4;
2057		goto rti;
2058		case 25:        // SDR1
2059	<	r->gpr[rd] = 0xdead001f;
2060	<	r->nip += 4;
2059	>	r->gpr(rd) = 0xdead001f;
2060	>	r->pc() += 4;
2061		goto rti;
2062		case 287:       // PVR
2063	<	r->gpr[rd] = PVR;
2064	<	r->nip += 4;
2063	>	r->gpr(rd) = PVR;
2064	>	r->pc() += 4;
2065		goto rti;
2066		}
2067		break;
#	Line 1654 | Line 2097 | power_inst:            sprintf(str, GetString(STR_
2097		case 957:       // PMC3
2098		case 958:       // PMC4
2099		case 959:       // SDA
2100	<	r->nip += 4;
2100	>	r->pc() += 4;
2101		goto rti;
2102		}
2103		break;
#	Line 1673 | Line 2116 | power_inst:            sprintf(str, GetString(STR_
2116
2117		// In GUI mode, show error alert
2118		if (!PrefsFindBool("nogui")) {
2119	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2119	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2120		ErrorAlert(str);
2121		QuitEmulator();
2122		return;
#	Line 1681 | Line 2124 | power_inst:            sprintf(str, GetString(STR_
2124		}
2125
2126		// For all other errors, jump into debugger (sort of...)
2127	+	crash_reason = "SIGILL";
2128		if (!ready_for_signals) {
2129	<	printf("SIGILL\n");
2130	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2129	>	printf("%s\n");
2130	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2131		printf(
2132		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2133		"  xer %08lx     cr %08lx  \n"
#	Line 1695 | Line 2139 | power_inst:            sprintf(str, GetString(STR_
2139		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2140		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2141		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2142	<	r->nip, r->link, r->ctr, r->msr,
2143	<	r->xer, r->ccr,
2144	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2145	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2146	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2147	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2148	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2149	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2150	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2151	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2142	>	crash_reason,
2143	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2144	>	r->xer(), r->cr(),
2145	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2146	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2147	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2148	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2149	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2150	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2151	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2152	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2153		exit(1);
2154		QuitEmulator();
2155		return;
2156		} else {
2157		// We crashed. Save registers, tell tick thread and loop forever
2158	<	sigsegv_regs = *(sigregs *)r;
2158	>	build_sigregs(&sigsegv_regs, r);
2159		emul_thread_fatal = true;
2160		for (;;) ;
2161		}
#	Line 1720 | Line 2165 | rti:;
2165
2166
2167		/*
2168	+	*  Helpers to share 32-bit addressable data with MacOS
2169	+	*/
2170	+
2171	+	bool SheepMem::Init(void)
2172	+	{
2173	+	// Size of a native page
2174	+	page_size = getpagesize();
2175	+
2176	+	// Allocate SheepShaver globals
2177	+	if (vm_acquire_fixed((char *)base, size) < 0)
2178	+	return false;
2179	+
2180	+	// Allocate page with all bits set to 0
2181	+	zero_page = base + size;
2182	+	if (vm_acquire_fixed((char *)zero_page, page_size) < 0)
2183	+	return false;
2184	+	memset((char *)zero_page, 0, page_size);
2185	+	if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0)
2186	+	return false;
2187	+
2188	+	#if EMULATED_PPC
2189	+	// Allocate alternate stack for PowerPC interrupt routine
2190	+	sig_stack = zero_page + page_size;
2191	+	if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0)
2192	+	return false;
2193	+	#endif
2194	+
2195	+	top = base + size;
2196	+	return true;
2197	+	}
2198	+
2199	+	void SheepMem::Exit(void)
2200	+	{
2201	+	if (top) {
2202	+	// Delete SheepShaver globals
2203	+	vm_release((void *)base, size);
2204	+
2205	+	// Delete zero page
2206	+	vm_release((void *)zero_page, page_size);
2207	+
2208	+	#if EMULATED_PPC
2209	+	// Delete alternate stack for PowerPC interrupt routine
2210	+	vm_release((void *)sig_stack, SIG_STACK_SIZE);
2211	+	#endif
2212	+	}
2213	+	}
2214	+
2215	+
2216	+	/*
2217		*  Display alert
2218		*/
2219
#	Line 1768 | Line 2262 | void display_alert(int title_id, int pre
2262
2263		void ErrorAlert(const char *text)
2264		{
2265	<	#ifdef ENABLE_GTK
2265	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2266		if (PrefsFindBool("nogui") || x_display == NULL) {
2267		printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2268		return;
#	Line 1787 | Line 2281 | void ErrorAlert(const char *text)
2281
2282		void WarningAlert(const char *text)
2283		{
2284	<	#ifdef ENABLE_GTK
2284	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2285		if (PrefsFindBool("nogui") || x_display == NULL) {
2286		printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2287		return;

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