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

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.13 by gbeauche, 2003-11-03T21:28:25Z vs.
Revision 1.53 by gbeauche, 2004-11-22T21:33:32Z

#	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	>	#if REAL_ADDRESSING
178	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
179	>	#else
180	>	// FIXME: needs to be >= 0x04000000
181	>	const uintptr RAM_BASE = 0x10000000;            // Base address of RAM
182	>	#endif
183		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
184
185
186		#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	–
187		struct sigregs {
188	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
189	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
190	<	//more (uninteresting) stuff following here
188	>	uint32 nip;
189	>	uint32 link;
190	>	uint32 ctr;
191	>	uint32 msr;
192	>	uint32 xer;
193	>	uint32 ccr;
194	>	uint32 gpr[32];
195		};
196	+
197	+	#if defined(__linux__)
198	+	#include <sys/ucontext.h>
199	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
200	+
201	+	struct machine_regs : public pt_regs
202	+	{
203	+	u_long & cr()                           { return pt_regs::ccr; }
204	+	uint32 cr() const                       { return pt_regs::ccr; }
205	+	uint32 lr() const                       { return pt_regs::link; }
206	+	uint32 ctr() const                      { return pt_regs::ctr; }
207	+	uint32 xer() const                      { return pt_regs::xer; }
208	+	uint32 msr() const                      { return pt_regs::msr; }
209	+	uint32 dar() const                      { return pt_regs::dar; }
210	+	u_long & pc()                           { return pt_regs::nip; }
211	+	uint32 pc() const                       { return pt_regs::nip; }
212	+	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
213	+	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
214	+	};
215	+	#endif
216	+
217	+	#if defined(__APPLE__) && defined(__MACH__)
218	+	#include <sys/signal.h>
219	+	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
220	+
221	+	#include <sys/ucontext.h>
222	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
223	+
224	+	struct machine_regs : public mcontext
225	+	{
226	+	uint32 & cr()                           { return ss.cr; }
227	+	uint32 cr() const                       { return ss.cr; }
228	+	uint32 lr() const                       { return ss.lr; }
229	+	uint32 ctr() const                      { return ss.ctr; }
230	+	uint32 xer() const                      { return ss.xer; }
231	+	uint32 msr() const                      { return ss.srr1; }
232	+	uint32 dar() const                      { return es.dar; }
233	+	uint32 & pc()                           { return ss.srr0; }
234	+	uint32 pc() const                       { return ss.srr0; }
235	+	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
236	+	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
237	+	};
238	+	#endif
239	+
240	+	static void build_sigregs(sigregs *srp, machine_regs *mrp)
241	+	{
242	+	srp->nip = mrp->pc();
243	+	srp->link = mrp->lr();
244	+	srp->ctr = mrp->ctr();
245	+	srp->msr = mrp->msr();
246	+	srp->xer = mrp->xer();
247	+	srp->ccr = mrp->cr();
248	+	for (int i = 0; i < 32; i++)
249	+	srp->gpr[i] = mrp->gpr(i);
250	+	}
251	+
252	+	static struct sigaltstack sig_stacks[SIG_STACK_COUNT];  // Stacks for signal handlers
253	+	static int sig_stack_id = 0;                                                    // Stack slot currently used
254	+
255	+	static inline void sig_stack_acquire(void)
256	+	{
257	+	if (++sig_stack_id == SIG_STACK_COUNT) {
258	+	printf("FATAL: signal stack overflow\n");
259	+	return;
260	+	}
261	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
262	+	}
263	+
264	+	static inline void sig_stack_release(void)
265	+	{
266	+	if (--sig_stack_id < 0) {
267	+	printf("FATAL: signal stack underflow\n");
268	+	return;
269	+	}
270	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
271	+	}
272		#endif
273
274
#	Line 172 | Line 278 | void *TOC;                             // Small data pointer (r13
278		#endif
279		uint32 RAMBase;                 // Base address of Mac RAM
280		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
281		uint32 KernelDataAddr;  // Address of Kernel Data
282		uint32 BootGlobsAddr;   // Address of BootGlobs structure at top of Mac RAM
283	+	uint32 DRCacheAddr;             // Address of DR Cache
284		uint32 PVR;                             // Theoretical PVR
285		int64 CPUClockSpeed;    // Processor clock speed (Hz)
286		int64 BusClockSpeed;    // Bus clock speed (Hz)
287	+	int64 TimebaseSpeed;    // Timebase clock speed (Hz)
288	+	uint8 *RAMBaseHost;             // Base address of Mac RAM (host address space)
289	+	uint8 *ROMBaseHost;             // Base address of Mac ROM (host address space)
290
291
292		// Global variables
293	+	#ifndef USE_SDL_VIDEO
294		char *x_display_name = NULL;                            // X11 display name
295		Display *x_display = NULL;                                      // X11 display handle
296	+	#ifdef X11_LOCK_TYPE
297	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
298	+	#endif
299	+	#endif
300
301		static int zero_fd = 0;                                         // FD of /dev/zero
190	–	static bool sheep_area_mapped = false;          // Flag: SheepShaver data area mmap()ed
302		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
303		static int kernel_area = -1;                            // SHM ID of Kernel Data area
304		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
305		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
306	+	static bool dr_cache_area_mapped = false;       // Flag: Mac DR Cache mmap()ped
307	+	static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
308		static KernelData *kernel_data;                         // Pointer to Kernel Data
309		static EmulatorData *emulator_data;
310
311		static uint8 last_xpram[XPRAM_SIZE];            // Buffer for monitoring XPRAM changes
312
313		static bool nvram_thread_active = false;        // Flag: NVRAM watchdog installed
314	+	static volatile bool nvram_thread_cancel;       // Flag: Cancel NVRAM thread
315		static pthread_t nvram_thread;                          // NVRAM watchdog
316		static bool tick_thread_active = false;         // Flag: MacOS thread installed
317	+	static volatile bool tick_thread_cancel;        // Flag: Cancel 60Hz thread
318		static pthread_t tick_thread;                           // 60Hz thread
319		static pthread_t emul_thread;                           // MacOS thread
320
#	Line 207 | Line 322 | static bool ready_for_signals = false;
322		static int64 num_segv = 0;                                      // Number of handled SEGV signals
323
324		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
325	<	#if !EMULATED_PPC
325	>	#if EMULATED_PPC
326	>	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
327	>	#else
328		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
329		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
330		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
331		static sigregs sigsegv_regs;                            // Register dump when crashed
332	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
333		#endif
334
335	+	uint32  SheepMem::page_size;                            // Size of a native page
336	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
337	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
338	+	uintptr SheepMem::proc;                                         // Bottom address of SheepShave procedures
339	+	uintptr SheepMem::data;                                         // Top of SheepShaver data (stack like storage)
340	+
341
342		// Prototypes
343	+	static bool kernel_data_init(void);
344	+	static void kernel_data_exit(void);
345		static void Quit(void);
346		static void *emul_func(void *arg);
347		static void *nvram_func(void *arg);
348		static void *tick_func(void *arg);
349		#if EMULATED_PPC
226	–	static void sigusr2_handler(int sig);
350		extern void emul_ppc(uint32 start);
351		extern void init_emul_ppc(void);
352		extern void exit_emul_ppc(void);
353	+	sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
354		#else
355	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
356	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
357	<	static void sigill_handler(int sig, sigcontext_struct *sc);
355	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
356	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
357	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
358		#endif
359
360
#	Line 252 | Line 376 | extern void paranoia_check(void);
376
377		#if EMULATED_PPC
378		/*
379	+	*  Return signal stack base
380	+	*/
381	+
382	+	uintptr SignalStackBase(void)
383	+	{
384	+	return sig_stack + SIG_STACK_SIZE;
385	+	}
386	+
387	+
388	+	/*
389		*  Atomic operations
390		*/
391
#	Line 292 | Line 426 | int atomic_or(int *var, int v)
426
427
428		/*
429	+	*  Memory management helpers
430	+	*/
431	+
432	+	static inline int vm_mac_acquire(uint32 addr, uint32 size)
433	+	{
434	+	return vm_acquire_fixed(Mac2HostAddr(addr), size);
435	+	}
436	+
437	+	static inline int vm_mac_release(uint32 addr, uint32 size)
438	+	{
439	+	return vm_release(Mac2HostAddr(addr), size);
440	+	}
441	+
442	+
443	+	/*
444		*  Main program
445		*/
446
#	Line 307 | Line 456 | static void usage(const char *prg_name)
456		int main(int argc, char **argv)
457		{
458		char str[256];
310	–	uint32 *boot_globs;
459		int16 i16;
460		int rom_fd;
461		FILE *proc_file;
#	Line 342 | Line 490 | int main(int argc, char **argv)
490		for (int i=1; i<argc; i++) {
491		if (strcmp(argv[i], "--help") == 0) {
492		usage(argv[0]);
493	+	#ifndef USE_SDL_VIDEO
494		} else if (strcmp(argv[i], "--display") == 0) {
495		i++;
496		if (i < argc)
497		x_display_name = strdup(argv[i]);
498	+	#endif
499		} else if (argv[i][0] == '-') {
500		fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
501		usage(argv[0]);
502		}
503		}
504
505	+	#ifdef USE_SDL
506	+	// Initialize SDL system
507	+	int sdl_flags = 0;
508	+	#ifdef USE_SDL_VIDEO
509	+	sdl_flags |= SDL_INIT_VIDEO;
510	+	#endif
511	+	#ifdef USE_SDL_AUDIO
512	+	sdl_flags |= SDL_INIT_AUDIO;
513	+	#endif
514	+	assert(sdl_flags != 0);
515	+	if (SDL_Init(sdl_flags) == -1) {
516	+	char str[256];
517	+	sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
518	+	ErrorAlert(str);
519	+	goto quit;
520	+	}
521	+	atexit(SDL_Quit);
522	+	#endif
523	+
524	+	#ifndef USE_SDL_VIDEO
525		// Open display
526		x_display = XOpenDisplay(x_display_name);
527		if (x_display == NULL) {
#	Line 365 | Line 535 | int main(int argc, char **argv)
535		// Fork out, so we can return from fullscreen mode when things get ugly
536		XF86DGAForkApp(DefaultScreen(x_display));
537		#endif
538	+	#endif
539
540		#ifdef ENABLE_MON
541		// Initialize mon
542		mon_init();
543		#endif
544
545	+	#if !EMULATED_PPC
546	+	// Create and install stacks for signal handlers
547	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
548	+	void *sig_stack = malloc(SIG_STACK_SIZE);
549	+	D(bug("Signal stack %d at %p\n", i, sig_stack));
550	+	if (sig_stack == NULL) {
551	+	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
552	+	goto quit;
553	+	}
554	+	sig_stacks[i].ss_sp = sig_stack;
555	+	sig_stacks[i].ss_flags = 0;
556	+	sig_stacks[i].ss_size = SIG_STACK_SIZE;
557	+	}
558	+	sig_stack_id = 0;
559	+	if (sigaltstack(&sig_stacks[0], NULL) < 0) {
560	+	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
561	+	ErrorAlert(str);
562	+	goto quit;
563	+	}
564	+	#endif
565	+
566	+	#if !EMULATED_PPC
567	+	// Install SIGSEGV and SIGBUS handlers
568	+	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
569	+	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
570	+	sigsegv_action.sa_sigaction = sigsegv_handler;
571	+	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
572	+	#ifdef HAVE_SIGNAL_SA_RESTORER
573	+	sigsegv_action.sa_restorer = NULL;
574	+	#endif
575	+	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
576	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
577	+	ErrorAlert(str);
578	+	goto quit;
579	+	}
580	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
581	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
582	+	ErrorAlert(str);
583	+	goto quit;
584	+	}
585	+	#else
586	+	// Install SIGSEGV handler for CPU emulator
587	+	if (!sigsegv_install_handler(sigsegv_handler)) {
588	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
589	+	ErrorAlert(str);
590	+	goto quit;
591	+	}
592	+	#endif
593	+
594	+	// Initialize VM system
595	+	vm_init();
596	+
597		// Get system info
598		PVR = 0x00040000;                       // Default: 604
599		CPUClockSpeed = 100000000;      // Default: 100MHz
600		BusClockSpeed = 100000000;      // Default: 100MHz
601	<	#if !EMULATED_PPC
601	>	TimebaseSpeed =  25000000;      // Default:  25MHz
602	>	#if EMULATED_PPC
603	>	PVR = 0x000c0000;                       // Default: 7400 (with AltiVec)
604	>	#elif defined(__APPLE__) && defined(__MACH__)
605	>	proc_file = popen("ioreg -c IOPlatformDevice", "r");
606	>	if (proc_file) {
607	>	char line[256];
608	>	bool powerpc_node = false;
609	>	while (fgets(line, sizeof(line) - 1, proc_file)) {
610	>	// Read line
611	>	int len = strlen(line);
612	>	if (len == 0)
613	>	continue;
614	>	line[len - 1] = 0;
615	>
616	>	// Parse line
617	>	if (strstr(line, "o PowerPC,"))
618	>	powerpc_node = true;
619	>	else if (powerpc_node) {
620	>	uint32 value;
621	>	char head[256];
622	>	if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
623	>	PVR = value;
624	>	else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
625	>	CPUClockSpeed = value;
626	>	else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
627	>	BusClockSpeed = value;
628	>	else if (sscanf(line, "%[ |]\"timebase-frequency\" = <%x>", head, &value) == 2)
629	>	TimebaseSpeed = value;
630	>	else if (strchr(line, '}'))
631	>	powerpc_node = false;
632	>	}
633	>	}
634	>	fclose(proc_file);
635	>	} else {
636	>	sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
637	>	WarningAlert(str);
638	>	}
639	>	#else
640		proc_file = fopen("/proc/cpuinfo", "r");
641		if (proc_file) {
642	+	// CPU specs from Linux kernel
643	+	// TODO: make it more generic with features (e.g. AltiVec) and
644	+	// cache information and friends for NameRegistry
645	+	static const struct {
646	+	uint32 pvr_mask;
647	+	uint32 pvr_value;
648	+	const char *cpu_name;
649	+	}
650	+	cpu_specs[] = {
651	+	{ 0xffff0000, 0x00010000, "601" },
652	+	{ 0xffff0000, 0x00030000, "603" },
653	+	{ 0xffff0000, 0x00060000, "603e" },
654	+	{ 0xffff0000, 0x00070000, "603ev" },
655	+	{ 0xffff0000, 0x00040000, "604" },
656	+	{ 0xfffff000, 0x00090000, "604e" },
657	+	{ 0xffff0000, 0x00090000, "604r" },
658	+	{ 0xffff0000, 0x000a0000, "604ev" },
659	+	{ 0xffffffff, 0x00084202, "740/750" },
660	+	{ 0xfffff000, 0x00083000, "745/755" },
661	+	{ 0xfffffff0, 0x00080100, "750CX" },
662	+	{ 0xfffffff0, 0x00082200, "750CX" },
663	+	{ 0xfffffff0, 0x00082210, "750CXe" },
664	+	{ 0xffffff00, 0x70000100, "750FX" },
665	+	{ 0xffffffff, 0x70000200, "750FX" },
666	+	{ 0xffff0000, 0x70000000, "750FX" },
667	+	{ 0xffff0000, 0x70020000, "750GX" },
668	+	{ 0xffff0000, 0x00080000, "740/750" },
669	+	{ 0xffffffff, 0x000c1101, "7400 (1.1)" },
670	+	{ 0xffff0000, 0x000c0000, "7400" },
671	+	{ 0xffff0000, 0x800c0000, "7410" },
672	+	{ 0xffffffff, 0x80000200, "7450" },
673	+	{ 0xffffffff, 0x80000201, "7450" },
674	+	{ 0xffff0000, 0x80000000, "7450" },
675	+	{ 0xffffff00, 0x80010100, "7455" },
676	+	{ 0xffffffff, 0x80010200, "7455" },
677	+	{ 0xffff0000, 0x80010000, "7455" },
678	+	{ 0xffff0000, 0x80020000, "7457" },
679	+	{ 0xffff0000, 0x80030000, "7447A" },
680	+	{ 0x7fff0000, 0x00810000, "82xx" },
681	+	{ 0x7fff0000, 0x00820000, "8280" },
682	+	{ 0xffff0000, 0x00400000, "Power3 (630)" },
683	+	{ 0xffff0000, 0x00410000, "Power3 (630+)" },
684	+	{ 0xffff0000, 0x00360000, "I-star" },
685	+	{ 0xffff0000, 0x00370000, "S-star" },
686	+	{ 0xffff0000, 0x00350000, "Power4" },
687	+	{ 0xffff0000, 0x00390000, "PPC970" },
688	+	{ 0, 0, 0 }
689	+	};
690	+
691		char line[256];
692		while(fgets(line, 255, proc_file)) {
693		// Read line
#	Line 389 | Line 699 | int main(int argc, char **argv)
699		// Parse line
700		int i;
701		char value[256];
702	<	if (sscanf(line, "cpu : %s", value) == 1) {
703	<	if (strcmp(value, "601") == 0)
704	<	PVR = 0x00010000;
705	<	else if (strcmp(value, "603") == 0)
706	<	PVR = 0x00030000;
707	<	else if (strcmp(value, "604") == 0)
708	<	PVR = 0x00040000;
709	<	else if (strcmp(value, "603e") == 0)
710	<	PVR = 0x00060000;
711	<	else if (strcmp(value, "603ev") == 0)
712	<	PVR = 0x00070000;
403	<	else if (strcmp(value, "604e") == 0)
404	<	PVR = 0x00090000;
405	<	else if (strcmp(value, "604ev5") == 0)
406	<	PVR = 0x000a0000;
407	<	else if (strcmp(value, "750") == 0)
408	<	PVR = 0x00080000;
409	<	else if (strcmp(value, "821") == 0)
410	<	PVR = 0x00320000;
411	<	else if (strcmp(value, "860") == 0)
412	<	PVR = 0x00500000;
413	<	else
702	>	if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
703	>	// Search by name
704	>	const char *cpu_name = NULL;
705	>	for (int i = 0; cpu_specs[i].pvr_mask != 0; i++) {
706	>	if (strcmp(cpu_specs[i].cpu_name, value) == 0) {
707	>	cpu_name = cpu_specs[i].cpu_name;
708	>	PVR = cpu_specs[i].pvr_value;
709	>	break;
710	>	}
711	>	}
712	>	if (cpu_name == NULL)
713		printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
714	+	else
715	+	printf("Found a PowerPC %s processor\n", cpu_name);
716		}
717		if (sscanf(line, "clock : %dMHz", &i) == 1)
718		CPUClockSpeed = BusClockSpeed = i * 1000000;
#	Line 421 | Line 722 | int main(int argc, char **argv)
722		sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
723		WarningAlert(str);
724		}
725	+
726	+	// Get actual bus frequency
727	+	proc_file = fopen("/proc/device-tree/clock-frequency", "r");
728	+	if (proc_file) {
729	+	union { uint8 b[4]; uint32 l; } value;
730	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
731	+	BusClockSpeed = value.l;
732	+	fclose(proc_file);
733	+	}
734	+
735	+	// Get actual timebase frequency
736	+	TimebaseSpeed = BusClockSpeed / 4;
737	+	DIR *cpus_dir;
738	+	if ((cpus_dir = opendir("/proc/device-tree/cpus")) != NULL) {
739	+	struct dirent *cpu_entry;
740	+	while ((cpu_entry = readdir(cpus_dir)) != NULL) {
741	+	if (strstr(cpu_entry->d_name, "PowerPC,") == cpu_entry->d_name) {
742	+	char timebase_freq_node[256];
743	+	sprintf(timebase_freq_node, "/proc/device-tree/cpus/%s/timebase-frequency", cpu_entry->d_name);
744	+	proc_file = fopen(timebase_freq_node, "r");
745	+	if (proc_file) {
746	+	union { uint8 b[4]; uint32 l; } value;
747	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
748	+	TimebaseSpeed = value.l;
749	+	fclose(proc_file);
750	+	}
751	+	}
752	+	}
753	+	closedir(cpus_dir);
754	+	}
755		#endif
756	+	// Remap any newer G4/G5 processor to plain G4 for compatibility
757	+	switch (PVR >> 16) {
758	+	case 0x8000:                            // 7450
759	+	case 0x8001:                            // 7455
760	+	case 0x8002:                            // 7457
761	+	case 0x0039:                            //  970
762	+	PVR = 0x000c0000;               // 7400
763	+	break;
764	+	}
765		D(bug("PVR: %08x (assumed)\n", PVR));
766
767		// Init system routines
#	Line 445 | Line 785 | int main(int argc, char **argv)
785		goto quit;
786		}
787
788	+	#ifndef PAGEZERO_HACK
789		// Create Low Memory area (0x0000..0x3000)
790	<	if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
790	>	if (vm_mac_acquire(0, 0x3000) < 0) {
791		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
792		ErrorAlert(str);
793		goto quit;
794		}
795		lm_area_mapped = true;
796	+	#endif
797
798		// Create areas for Kernel Data
799	<	kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
800	<	if (kernel_area == -1) {
801	<	sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno));
799	>	if (!kernel_data_init())
800	>	goto quit;
801	>	kernel_data = (KernelData *)Mac2HostAddr(KERNEL_DATA_BASE);
802	>	emulator_data = &kernel_data->ed;
803	>	KernelDataAddr = KERNEL_DATA_BASE;
804	>	D(bug("Kernel Data at %p (%08x)\n", kernel_data, KERNEL_DATA_BASE));
805	>	D(bug("Emulator Data at %p (%08x)\n", emulator_data, KERNEL_DATA_BASE + offsetof(KernelData, ed)));
806	>
807	>	// Create area for DR Cache
808	>	if (vm_mac_acquire(DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
809	>	sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
810		ErrorAlert(str);
811		goto quit;
812		}
813	<	if (shmat(kernel_area, (void *)KERNEL_DATA_BASE, 0) < 0) {
814	<	sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno));
813	>	dr_emulator_area_mapped = true;
814	>	if (vm_mac_acquire(DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
815	>	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
816		ErrorAlert(str);
817		goto quit;
818		}
819	<	if (shmat(kernel_area, (void *)KERNEL_DATA2_BASE, 0) < 0) {
820	<	sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno));
819	>	dr_cache_area_mapped = true;
820	>	#if !EMULATED_PPC
821	>	if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
822	>	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
823		ErrorAlert(str);
824		goto quit;
825		}
826	<	kernel_data = (KernelData *)0x68ffe000;
827	<	emulator_data = &kernel_data->ed;
828	<	KernelDataAddr = (uint32)kernel_data;
476	<	D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
826	>	#endif
827	>	DRCacheAddr = DR_CACHE_BASE;
828	>	D(bug("DR Cache at %p\n", DRCacheAddr));
829
830		// Create area for SheepShaver data
831	<	if (vm_acquire_fixed((char *)SHEEP_BASE, SHEEP_SIZE) < 0) {
831	>	if (!SheepMem::Init()) {
832		sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
833		ErrorAlert(str);
834		goto quit;
835		}
484	–	SheepStack1Base = SHEEP_BASE + 0x10000;
485	–	SheepStack2Base = SheepStack1Base + 0x10000;
486	–	SheepThunksBase = SheepStack2Base + 0x1000;
487	–	sheep_area_mapped = true;
836
837		// Create area for Mac ROM
838	<	if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
838	>	if (vm_mac_acquire(ROM_BASE, ROM_AREA_SIZE) < 0) {
839		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
840		ErrorAlert(str);
841		goto quit;
842		}
843	<	#if !EMULATED_PPC || defined(__powerpc__)
844	<	if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
843	>	ROMBaseHost = Mac2HostAddr(ROM_BASE);
844	>	#if !EMULATED_PPC
845	>	if (vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
846		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
847		ErrorAlert(str);
848		goto quit;
849		}
850		#endif
851		rom_area_mapped = true;
852	<	D(bug("ROM area at %08x\n", ROM_BASE));
852	>	D(bug("ROM area at %p (%08x)\n", ROMBaseHost, ROM_BASE));
853
854		// Create area for Mac RAM
855		RAMSize = PrefsFindInt32("ramsize");
#	Line 509 | Line 858 | int main(int argc, char **argv)
858		RAMSize = 8*1024*1024;
859		}
860
861	<	if (vm_acquire_fixed((char *)RAM_BASE, RAMSize) < 0) {
861	>	if (vm_mac_acquire(RAM_BASE, RAMSize) < 0) {
862		sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
863		ErrorAlert(str);
864		goto quit;
865		}
866	+	RAMBaseHost = Mac2HostAddr(RAM_BASE);
867		#if !EMULATED_PPC
868	<	if (vm_protect((char *)RAM_BASE, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
868	>	if (vm_protect(RAMBaseHost, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
869		sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
870		ErrorAlert(str);
871		goto quit;
#	Line 523 | Line 873 | int main(int argc, char **argv)
873		#endif
874		RAMBase = RAM_BASE;
875		ram_area_mapped = true;
876	<	D(bug("RAM area at %08x\n", RAMBase));
876	>	D(bug("RAM area at %p (%08x)\n", RAMBaseHost, RAMBase));
877
878		if (RAMBase > ROM_BASE) {
879		ErrorAlert(GetString(STR_RAM_HIGHER_THAN_ROM_ERR));
#	Line 562 | Line 912 | int main(int argc, char **argv)
912		// Load NVRAM
913		XPRAMInit();
914
915	+	// Load XPRAM default values if signature not found
916	+	if (XPRAM[0x130c] != 0x4e || XPRAM[0x130d] != 0x75
917	+	|| XPRAM[0x130e] != 0x4d || XPRAM[0x130f] != 0x63) {
918	+	D(bug("Loading XPRAM default values\n"));
919	+	memset(XPRAM + 0x1300, 0, 0x100);
920	+	XPRAM[0x130c] = 0x4e;   // "NuMc" signature
921	+	XPRAM[0x130d] = 0x75;
922	+	XPRAM[0x130e] = 0x4d;
923	+	XPRAM[0x130f] = 0x63;
924	+	XPRAM[0x1301] = 0x80;   // InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
925	+	XPRAM[0x1310] = 0xa8;   // Standard PRAM values
926	+	XPRAM[0x1311] = 0x00;
927	+	XPRAM[0x1312] = 0x00;
928	+	XPRAM[0x1313] = 0x22;
929	+	XPRAM[0x1314] = 0xcc;
930	+	XPRAM[0x1315] = 0x0a;
931	+	XPRAM[0x1316] = 0xcc;
932	+	XPRAM[0x1317] = 0x0a;
933	+	XPRAM[0x131c] = 0x00;
934	+	XPRAM[0x131d] = 0x02;
935	+	XPRAM[0x131e] = 0x63;
936	+	XPRAM[0x131f] = 0x00;
937	+	XPRAM[0x1308] = 0x13;
938	+	XPRAM[0x1309] = 0x88;
939	+	XPRAM[0x130a] = 0x00;
940	+	XPRAM[0x130b] = 0xcc;
941	+	XPRAM[0x1376] = 0x00;   // OSDefault = MacOS
942	+	XPRAM[0x1377] = 0x01;
943	+	}
944	+
945		// Set boot volume
946		i16 = PrefsFindInt32("bootdrive");
947		XPRAM[0x1378] = i16 >> 8;
#	Line 571 | Line 951 | int main(int argc, char **argv)
951		XPRAM[0x137b] = i16 & 0xff;
952
953		// Create BootGlobs at top of Mac memory
954	<	memset((void *)(RAMBase + RAMSize - 4096), 0, 4096);
954	>	memset(RAMBaseHost + RAMSize - 4096, 0, 4096);
955		BootGlobsAddr = RAMBase + RAMSize - 0x1c;
956	<	boot_globs = (uint32 *)BootGlobsAddr;
957	<	boot_globs[-5] = htonl(RAMBase + RAMSize);      // MemTop
958	<	boot_globs[0] = htonl(RAMBase);                         // First RAM bank
959	<	boot_globs[1] = htonl(RAMSize);
960	<	boot_globs[2] = htonl((uint32)-1);                      // End of bank table
956	>	WriteMacInt32(BootGlobsAddr - 5 * 4, RAMBase + RAMSize);        // MemTop
957	>	WriteMacInt32(BootGlobsAddr + 0 * 4, RAMBase);                          // First RAM bank
958	>	WriteMacInt32(BootGlobsAddr + 1 * 4, RAMSize);
959	>	WriteMacInt32(BootGlobsAddr + 2 * 4, (uint32)-1);                       // End of bank table
960	>
961	>	// Init thunks
962	>	if (!ThunksInit())
963	>	goto quit;
964
965		// Init drivers
966		SonyInit();
#	Line 588 | Line 971 | int main(int argc, char **argv)
971		// Init external file system
972		ExtFSInit();
973
974	+	// Init ADB
975	+	ADBInit();
976	+
977		// Init audio
978		AudioInit();
979
#	Line 615 | Line 1001 | int main(int argc, char **argv)
1001
1002		// Clear caches (as we loaded and patched code) and write protect ROM
1003		#if !EMULATED_PPC
1004	<	MakeExecutable(0, (void *)ROM_BASE, ROM_AREA_SIZE);
1004	>	MakeExecutable(0, ROM_BASE, ROM_AREA_SIZE);
1005		#endif
1006	<	vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
1006	>	vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
1007
1008		// Initialize Kernel Data
1009		memset(kernel_data, 0, sizeof(KernelData));
1010		if (ROMType == ROMTYPE_NEWWORLD) {
1011	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
1012	<	static uint8 vector_lookup_tbl[128];
1013	<	static uint8 vector_mask_tbl[64];
1011	>	uint32 of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
1012	>	Mac_memset(of_dev_tree, 0, 4 * sizeof(uint32));
1013	>	uint32 vector_lookup_tbl = SheepMem::Reserve(128);
1014	>	uint32 vector_mask_tbl = SheepMem::Reserve(64);
1015		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
1016	<	memset(vector_lookup_tbl, 0, 128);
1017	<	memset(vector_mask_tbl, 0, 64);
1016	>	Mac_memset(vector_lookup_tbl, 0, 128);
1017	>	Mac_memset(vector_mask_tbl, 0, 64);
1018		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
1019	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
1020	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
1021	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
1019	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree);                        // OF device tree base
1020	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
1021	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
1022		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
1023		kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
1024		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 644 | Line 1031 | int main(int argc, char **argv)
1031		kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
1032		kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
1033		kernel_data->v[0xf60 >> 2] = htonl(PVR);
1034	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
1035	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
1036	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
1034	>	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
1035	>	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
1036	>	kernel_data->v[0xf6c >> 2] = htonl(TimebaseSpeed);                      // timebase-frequency
1037		} else {
1038		kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
1039		kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
#	Line 658 | Line 1045 | int main(int argc, char **argv)
1045		kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
1046		kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
1047		kernel_data->v[0xf80 >> 2] = htonl(PVR);
1048	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
1049	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
1050	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
1048	>	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
1049	>	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
1050	>	kernel_data->v[0xf8c >> 2] = htonl(TimebaseSpeed);                      // timebase-frequency
1051		}
1052
1053		// Initialize extra low memory
1054		D(bug("Initializing Low Memory...\n"));
1055	<	memset(NULL, 0, 0x3000);
1055	>	Mac_memset(0, 0, 0x3000);
1056		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
1057	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
1057	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr);                                 // For trap replacement routines
1058		WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
1059		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
1060		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
1061	<	#if EMULATED_PPC
1062	<	WriteMacInt32(XLM_ETHER_INIT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_INIT));
1063	<	WriteMacInt32(XLM_ETHER_TERM, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_TERM));
677	<	WriteMacInt32(XLM_ETHER_OPEN, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_OPEN));
678	<	WriteMacInt32(XLM_ETHER_CLOSE, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_CLOSE));
679	<	WriteMacInt32(XLM_ETHER_WPUT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_WPUT));
680	<	WriteMacInt32(XLM_ETHER_RSRV, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_RSRV));
681	<	WriteMacInt32(XLM_VIDEO_DOIO, POWERPC_NATIVE_OP_FUNC(NATIVE_VIDEO_DO_DRIVER_IO));
682	<	#else
683	<	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                    // TOC pointer of emulator
684	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule);                // DLPI ethernet driver functions
685	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
686	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
687	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
688	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
689	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
690	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
1061	>	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage());                             // Pointer to read-only page with all bits set to 0
1062	>	#if !EMULATED_PPC
1063	>	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                            // TOC pointer of emulator
1064		#endif
1065	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT));       // DLPI ethernet driver functions
1066	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
1067	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
1068	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
1069	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
1070	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
1071	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
1072		D(bug("Low Memory initialized\n"));
1073
1074		// Start 60Hz thread
1075	+	tick_thread_cancel = false;
1076		tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
1077		D(bug("Tick thread installed (%ld)\n", tick_thread));
1078
1079		// Start NVRAM watchdog thread
1080		memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1081	+	nvram_thread_cancel = false;
1082		nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
1083		D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
1084
1085		#if !EMULATED_PPC
704	–	// Create and install stacks for signal handlers
705	–	sig_stack = malloc(SIG_STACK_SIZE);
706	–	D(bug("Signal stack at %p\n", sig_stack));
707	–	if (sig_stack == NULL) {
708	–	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
709	–	goto quit;
710	–	}
711	–	extra_stack = malloc(SIG_STACK_SIZE);
712	–	D(bug("Extra stack at %p\n", extra_stack));
713	–	if (extra_stack == NULL) {
714	–	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
715	–	goto quit;
716	–	}
717	–	struct sigaltstack new_stack;
718	–	new_stack.ss_sp = sig_stack;
719	–	new_stack.ss_flags = 0;
720	–	new_stack.ss_size = SIG_STACK_SIZE;
721	–	if (sigaltstack(&new_stack, NULL) < 0) {
722	–	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
723	–	ErrorAlert(str);
724	–	goto quit;
725	–	}
726	–	#endif
727	–
728	–	#if !EMULATED_PPC
729	–	// Install SIGSEGV handler
730	–	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
731	–	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
732	–	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
733	–	sigsegv_action.sa_flags = SA_ONSTACK;
734	–	sigsegv_action.sa_restorer = NULL;
735	–	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
736	–	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
737	–	ErrorAlert(str);
738	–	goto quit;
739	–	}
740	–
1086		// Install SIGILL handler
1087		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
1088		sigaddset(&sigill_action.sa_mask, SIGUSR2);
1089	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
1090	<	sigill_action.sa_flags = SA_ONSTACK;
1089	>	sigill_action.sa_sigaction = sigill_handler;
1090	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
1091	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1092		sigill_action.sa_restorer = NULL;
1093	+	#endif
1094		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
1095		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
1096		ErrorAlert(str);
#	Line 751 | Line 1098 | int main(int argc, char **argv)
1098		}
1099		#endif
1100
1101	+	#if !EMULATED_PPC
1102		// Install interrupt signal handler
1103		sigemptyset(&sigusr2_action.sa_mask);
1104	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
1105	<	sigusr2_action.sa_flags = 0;
1106	<	#if !EMULATED_PPC
759	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
760	<	#endif
1104	>	sigusr2_action.sa_sigaction = sigusr2_handler;
1105	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
1106	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1107		sigusr2_action.sa_restorer = NULL;
1108	+	#endif
1109		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
1110		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
1111		ErrorAlert(str);
1112		goto quit;
1113		}
1114	+	#endif
1115
1116		// Get my thread ID and execute MacOS thread function
1117		emul_thread = pthread_self();
#	Line 789 | Line 1137 | static void Quit(void)
1137
1138		// Stop 60Hz thread
1139		if (tick_thread_active) {
1140	+	tick_thread_cancel = true;
1141		pthread_cancel(tick_thread);
1142		pthread_join(tick_thread, NULL);
1143		}
1144
1145		// Stop NVRAM watchdog thread
1146		if (nvram_thread_active) {
1147	+	nvram_thread_cancel = true;
1148		pthread_cancel(nvram_thread);
1149		pthread_join(nvram_thread, NULL);
1150		}
1151
1152		#if !EMULATED_PPC
1153	<	// Uninstall SIGSEGV handler
1153	>	// Uninstall SIGSEGV and SIGBUS handlers
1154		sigemptyset(&sigsegv_action.sa_mask);
1155		sigsegv_action.sa_handler = SIG_DFL;
1156		sigsegv_action.sa_flags = 0;
1157		sigaction(SIGSEGV, &sigsegv_action, NULL);
1158	+	sigaction(SIGBUS, &sigsegv_action, NULL);
1159
1160		// Uninstall SIGILL handler
1161		sigemptyset(&sigill_action.sa_mask);
1162		sigill_action.sa_handler = SIG_DFL;
1163		sigill_action.sa_flags = 0;
1164		sigaction(SIGILL, &sigill_action, NULL);
1165	+
1166	+	// Delete stacks for signal handlers
1167	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
1168	+	void *sig_stack = sig_stacks[i].ss_sp;
1169	+	if (sig_stack)
1170	+	free(sig_stack);
1171	+	}
1172		#endif
1173
1174		// Save NVRAM
#	Line 831 | Line 1189 | static void Quit(void)
1189		// Exit audio
1190		AudioExit();
1191
1192	+	// Exit ADB
1193	+	ADBExit();
1194	+
1195		// Exit video
1196		VideoExit();
1197
#	Line 843 | Line 1204 | static void Quit(void)
1204		DiskExit();
1205		SonyExit();
1206
1207	+	// Delete thunks
1208	+	ThunksExit();
1209	+
1210	+	// Delete SheepShaver globals
1211	+	SheepMem::Exit();
1212	+
1213		// Delete RAM area
1214		if (ram_area_mapped)
1215	<	vm_release((char *)RAM_BASE, RAMSize);
1215	>	vm_mac_release(RAM_BASE, RAMSize);
1216
1217		// Delete ROM area
1218		if (rom_area_mapped)
1219	<	vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1219	>	vm_mac_release(ROM_BASE, ROM_AREA_SIZE);
1220	>
1221	>	// Delete DR cache areas
1222	>	if (dr_emulator_area_mapped)
1223	>	vm_mac_release(DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1224	>	if (dr_cache_area_mapped)
1225	>	vm_mac_release(DR_CACHE_BASE, DR_CACHE_SIZE);
1226
1227		// Delete Kernel Data area
1228	<	if (kernel_area >= 0) {
856	<	shmdt((void *)KERNEL_DATA_BASE);
857	<	shmdt((void *)KERNEL_DATA2_BASE);
858	<	shmctl(kernel_area, IPC_RMID, NULL);
859	<	}
1228	>	kernel_data_exit();
1229
1230		// Delete Low Memory area
1231		if (lm_area_mapped)
1232	<	munmap((char *)0x0000, 0x3000);
1232	>	vm_mac_release(0, 0x3000);
1233
1234		// Close /dev/zero
1235		if (zero_fd > 0)
#	Line 878 | Line 1247 | static void Quit(void)
1247		#endif
1248
1249		// Close X11 server connection
1250	+	#ifndef USE_SDL_VIDEO
1251		if (x_display)
1252		XCloseDisplay(x_display);
1253	+	#endif
1254
1255		exit(0);
1256		}
1257
1258
1259		/*
1260	+	*  Initialize Kernel Data segments
1261	+	*/
1262	+
1263	+	#if defined(__CYGWIN__)
1264	+	#define WIN32_LEAN_AND_MEAN
1265	+	#include <windows.h>
1266	+
1267	+	static HANDLE kernel_handle;                            // Shared memory handle for Kernel Data
1268	+	static DWORD allocation_granule;                        // Minimum size of allocateable are (64K)
1269	+	static DWORD kernel_area_size;                          // Size of Kernel Data area
1270	+	#endif
1271	+
1272	+	static bool kernel_data_init(void)
1273	+	{
1274	+	#ifdef _WIN32
1275	+	SYSTEM_INFO si;
1276	+	GetSystemInfo(&si);
1277	+	allocation_granule = si.dwAllocationGranularity;
1278	+	kernel_area_size = (KERNEL_AREA_SIZE + allocation_granule - 1) & -allocation_granule;
1279	+
1280	+	char rcs[10];
1281	+	char str[256];
1282	+	LPVOID kernel_addr;
1283	+	kernel_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, kernel_area_size, NULL);
1284	+	if (kernel_handle == NULL) {
1285	+	sprintf(rcs, "%d", GetLastError());
1286	+	sprintf(str, GetString(STR_KD_SHMGET_ERR), rcs);
1287	+	ErrorAlert(str);
1288	+	return false;
1289	+	}
1290	+	kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule);
1291	+	if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
1292	+	sprintf(rcs, "%d", GetLastError());
1293	+	sprintf(str, GetString(STR_KD_SHMAT_ERR), rcs);
1294	+	ErrorAlert(str);
1295	+	return false;
1296	+	}
1297	+	kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule);
1298	+	if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
1299	+	sprintf(rcs, "%d", GetLastError());
1300	+	sprintf(str, GetString(STR_KD2_SHMAT_ERR), rcs);
1301	+	ErrorAlert(str);
1302	+	return false;
1303	+	}
1304	+	#else
1305	+	kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
1306	+	if (kernel_area == -1) {
1307	+	sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno));
1308	+	ErrorAlert(str);
1309	+	return false;
1310	+	}
1311	+	if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA_BASE), 0) < 0) {
1312	+	sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno));
1313	+	ErrorAlert(str);
1314	+	return false;
1315	+	}
1316	+	if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA2_BASE), 0) < 0) {
1317	+	sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno));
1318	+	ErrorAlert(str);
1319	+	return false;
1320	+	}
1321	+	#endif
1322	+	return true;
1323	+	}
1324	+
1325	+
1326	+	/*
1327	+	*  Deallocate Kernel Data segments
1328	+	*/
1329	+
1330	+	static void kernel_data_exit(void)
1331	+	{
1332	+	#ifdef _WIN32
1333	+	if (kernel_handle) {
1334	+	UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule));
1335	+	UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule));
1336	+	CloseHandle(kernel_handle);
1337	+	}
1338	+	#else
1339	+	if (kernel_area >= 0) {
1340	+	shmdt(Mac2HostAddr(KERNEL_DATA_BASE));
1341	+	shmdt(Mac2HostAddr(KERNEL_DATA2_BASE));
1342	+	shmctl(kernel_area, IPC_RMID, NULL);
1343	+	}
1344	+	#endif
1345	+	}
1346	+
1347	+
1348	+	/*
1349		*  Jump into Mac ROM, start 680x0 emulator
1350		*/
1351
#	Line 954 | Line 1414 | void Execute68kTrap(uint16 trap, M68kReg
1414		uint16 proc[2] = {trap, M68K_RTS};
1415		Execute68k((uint32)proc, r);
1416		}
957	–
958	–
959	–	/*
960	–	*  Execute PPC code from EMUL_OP routine (real mode switch)
961	–	*/
962	–
963	–	void ExecutePPC(void (*func)())
964	–	{
965	–	uint32 tvect[2] = {(uint32)func, 0};    // Fake TVECT
966	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
967	–	M68kRegisters r;
968	–	Execute68k((uint32)&desc, &r);
969	–	}
1417		#endif
1418
1419
#	Line 1027 | Line 1474 | void Dump68kRegs(M68kRegisters *r)
1474		*  Make code executable
1475		*/
1476
1477	<	void MakeExecutable(int dummy, void *start, uint32 length)
1477	>	void MakeExecutable(int dummy, uint32 start, uint32 length)
1478		{
1479	<	if (((uintptr)start >= ROM_BASE) && ((uintptr)start < (ROM_BASE + ROM_SIZE)))
1479	>	if ((start >= ROM_BASE) && (start < (ROM_BASE + ROM_SIZE)))
1480		return;
1481		#if EMULATED_PPC
1482	<	FlushCodeCache((uintptr)start, (uintptr)start + length);
1482	>	FlushCodeCache(start, start + length);
1483		#else
1484	<	flush_icache_range(start, (void *)((uintptr)start + length));
1484	>	flush_icache_range(start, (void *)(start + length));
1485		#endif
1486		}
1487
#	Line 1045 | Line 1492 | void MakeExecutable(int dummy, void *sta
1492
1493		void PatchAfterStartup(void)
1494		{
1048	–	#if EMULATED_PPC
1495		ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1050	–	#else
1051	–	ExecutePPC(VideoInstallAccel);
1052	–	#endif
1496		InstallExtFS();
1497		}
1498
#	Line 1058 | Line 1501 | void PatchAfterStartup(void)
1501		*  NVRAM watchdog thread (saves NVRAM every minute)
1502		*/
1503
1504	<	static void *nvram_func(void *arg)
1504	>	static void nvram_watchdog(void)
1505		{
1506	<	struct timespec req = {60, 0};  // 1 minute
1506	>	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1507	>	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1508	>	SaveXPRAM();
1509	>	}
1510	>	}
1511
1512	<	for (;;) {
1513	<	pthread_testcancel();
1514	<	nanosleep(&req, NULL);
1515	<	pthread_testcancel();
1516	<	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1517	<	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1071	<	SaveXPRAM();
1072	<	}
1512	>	static void *nvram_func(void *arg)
1513	>	{
1514	>	while (!nvram_thread_cancel) {
1515	>	for (int i=0; i<60 && !nvram_thread_cancel; i++)
1516	>	Delay_usec(999999);             // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1517	>	nvram_watchdog();
1518		}
1519		return NULL;
1520		}
#	Line 1082 | Line 1527 | static void *nvram_func(void *arg)
1527		static void *tick_func(void *arg)
1528		{
1529		int tick_counter = 0;
1530	<	struct timespec req = {0, 16625000};
1530	>	uint64 start = GetTicks_usec();
1531	>	int64 ticks = 0;
1532	>	uint64 next = GetTicks_usec();
1533
1534	<	for (;;) {
1534	>	while (!tick_thread_cancel) {
1535
1536		// Wait
1537	<	nanosleep(&req, NULL);
1537	>	next += 16625;
1538	>	int64 delay = next - GetTicks_usec();
1539	>	if (delay > 0)
1540	>	Delay_usec(delay);
1541	>	else if (delay < -16625)
1542	>	next = GetTicks_usec();
1543	>	ticks++;
1544
1545		#if !EMULATED_PPC
1546		// Did we crash?
1547		if (emul_thread_fatal) {
1548
1549		// Yes, dump registers
1550	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1550	>	sigregs *r = &sigsegv_regs;
1551		char str[256];
1552	<	sprintf(str, "SIGSEGV\n"
1552	>	if (crash_reason == NULL)
1553	>	crash_reason = "SIGSEGV";
1554	>	sprintf(str, "%s\n"
1555		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1556		"  xer %08lx     cr %08lx  \n"
1557		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1107 | Line 1562 | static void *tick_func(void *arg)
1562		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1563		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1564		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1565	+	crash_reason,
1566		r->nip, r->link, r->ctr, r->msr,
1567		r->xer, r->ccr,
1568		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1142 | Line 1598 | static void *tick_func(void *arg)
1598		TriggerInterrupt();
1599		}
1600		}
1601	+
1602	+	uint64 end = GetTicks_usec();
1603	+	D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1604		return NULL;
1605		}
1606
#	Line 1152 | Line 1611 | static void *tick_func(void *arg)
1611
1612		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1613		{
1614	<	// nothing to do
1614	>	#ifdef HAVE_PTHREADS
1615	>	pthread_attr_init(attr);
1616	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1617	>	// Some of these only work for superuser
1618	>	if (geteuid() == 0) {
1619	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1620	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1621	>	struct sched_param fifo_param;
1622	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1623	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1624	>	priority);
1625	>	pthread_attr_setschedparam(attr, &fifo_param);
1626	>	}
1627	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1628	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1629	>	// If system scope is not available (eg. we're not running
1630	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1631	>	// scope.  It exposes pthread scheduling to the kernel,
1632	>	// without setting realtime priority.
1633	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1634	>	#endif
1635	>	}
1636	>	#endif
1637	>	#endif
1638		}
1639
1640
#	Line 1168 | Line 1650 | struct B2_mutex {
1650		pthread_mutexattr_init(&attr);
1651		// Initialize the mutex for priority inheritance --
1652		// required for accurate timing.
1653	<	#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
1653	>	#if defined(HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL) && !defined(__CYGWIN__)
1654		pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
1655		#endif
1656		#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
#	Line 1239 | Line 1721 | void B2_delete_mutex(B2_mutex *mutex)
1721		*  Trigger signal USR2 from another thread
1722		*/
1723
1724	<	#if !EMULATED_PPC || ASYNC_IRQ
1724	>	#if !EMULATED_PPC
1725		void TriggerInterrupt(void)
1726		{
1727		if (ready_for_signals)
#	Line 1271 | Line 1753 | void ClearInterruptFlag(uint32 flag)
1753
1754		void DisableInterrupt(void)
1755		{
1756	+	#if EMULATED_PPC
1757	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1758	+	#else
1759		atomic_add((int *)XLM_IRQ_NEST, 1);
1760	+	#endif
1761		}
1762
1763
#	Line 1281 | Line 1767 | void DisableInterrupt(void)
1767
1768		void EnableInterrupt(void)
1769		{
1770	+	#if EMULATED_PPC
1771	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1772	+	#else
1773		atomic_add((int *)XLM_IRQ_NEST, -1);
1774	+	#endif
1775		}
1776
1777
#	Line 1289 | Line 1779 | void EnableInterrupt(void)
1779		*  USR2 handler
1780		*/
1781
1782	<	#if EMULATED_PPC
1783	<	static void sigusr2_handler(int sig)
1782	>	#if !EMULATED_PPC
1783	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1784		{
1785	<	#if ASYNC_IRQ
1786	<	extern void HandleInterrupt(void);
1787	<	HandleInterrupt();
1785	>	machine_regs *r = MACHINE_REGISTERS(scp);
1786	>
1787	>	#ifdef USE_SDL_VIDEO
1788	>	// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
1789	>	SDL_PumpEvents();
1790		#endif
1299	–	}
1300	–	#else
1301	–	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1302	–	{
1303	–	pt_regs *r = sc->regs;
1791
1792		// Do nothing if interrupts are disabled
1793		if (*(int32 *)XLM_IRQ_NEST > 0)
#	Line 1314 | Line 1801 | static void sigusr2_handler(int sig, sig
1801		case MODE_68K:
1802		// 68k emulator active, trigger 68k interrupt level 1
1803		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1804	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1804	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1805		break;
1806
1807		#if INTERRUPTS_IN_NATIVE_MODE
1808		case MODE_NATIVE:
1809		// 68k emulator inactive, in nanokernel?
1810	<	if (r->gpr[1] != KernelDataAddr) {
1810	>	if (r->gpr(1) != KernelDataAddr) {
1811	>
1812	>	// Set extra stack for nested interrupts
1813	>	sig_stack_acquire();
1814	>
1815		// Prepare for 68k interrupt level 1
1816		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1817		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1818
1819		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1820	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1820	>	DisableInterrupt();
1821		if (ROMType == ROMTYPE_NEWWORLD)
1822		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1823		else
1824		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1825	+
1826	+	// Reset normal signal stack
1827	+	sig_stack_release();
1828		}
1829		break;
1830		#endif
#	Line 1341 | Line 1835 | static void sigusr2_handler(int sig, sig
1835		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1836
1837		// Set extra stack for SIGSEGV handler
1838	<	struct sigaltstack new_stack;
1345	<	new_stack.ss_sp = extra_stack;
1346	<	new_stack.ss_flags = 0;
1347	<	new_stack.ss_size = SIG_STACK_SIZE;
1348	<	sigaltstack(&new_stack, NULL);
1838	>	sig_stack_acquire();
1839		#if 1
1840		// Execute full 68k interrupt routine
1841		M68kRegisters r;
#	Line 1367 | Line 1857 | static void sigusr2_handler(int sig, sig
1857		if (InterruptFlags & INTFLAG_VIA) {
1858		ClearInterruptFlag(INTFLAG_VIA);
1859		ADBInterrupt();
1860	<	ExecutePPC(VideoVBL);
1860	>	ExecuteNative(NATIVE_VIDEO_VBL);
1861		}
1862		}
1863		#endif
1864		// Reset normal signal stack
1865	<	new_stack.ss_sp = sig_stack;
1376	<	new_stack.ss_flags = 0;
1377	<	new_stack.ss_size = SIG_STACK_SIZE;
1378	<	sigaltstack(&new_stack, NULL);
1865	>	sig_stack_release();
1866		}
1867		break;
1868		#endif
#	Line 1389 | Line 1876 | static void sigusr2_handler(int sig, sig
1876		*/
1877
1878		#if !EMULATED_PPC
1879	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1879	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1880		{
1881	<	pt_regs *r = sc->regs;
1881	>	machine_regs *r = MACHINE_REGISTERS(scp);
1882
1883		// Get effective address
1884	<	uint32 addr = r->dar;
1884	>	uint32 addr = r->dar();
1885
1886		#if ENABLE_VOSF
1887		// Handle screen fault.
1888		extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1889	<	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->nip))
1889	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1890		return;
1891		#endif
1892
1893		num_segv++;
1894
1895	<	// Fault in Mac ROM or RAM?
1896	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1895	>	// Fault in Mac ROM or RAM or DR Cache?
1896	>	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));
1897		if (mac_fault) {
1898
1899		// "VM settings" during MacOS 8 installation
1900	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1901	<	r->nip += 4;
1902	<	r->gpr[8] = 0;
1900	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1901	>	r->pc() += 4;
1902	>	r->gpr(8) = 0;
1903		return;
1904
1905		// MacOS 8.5 installation
1906	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1907	<	r->nip += 4;
1908	<	r->gpr[8] = 0;
1906	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1907	>	r->pc() += 4;
1908	>	r->gpr(8) = 0;
1909		return;
1910
1911		// MacOS 8 serial drivers on startup
1912	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1913	<	r->nip += 4;
1914	<	r->gpr[8] = 0;
1912	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1913	>	r->pc() += 4;
1914	>	r->gpr(8) = 0;
1915		return;
1916
1917		// MacOS 8.1 serial drivers on startup
1918	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1919	<	r->nip += 4;
1918	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1919	>	r->pc() += 4;
1920		return;
1921	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1922	<	r->nip += 4;
1921	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1922	>	r->pc() += 4;
1923	>	return;
1924	>
1925	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1926	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1927	>	r->pc() += 4;
1928	>	return;
1929	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1930	>	r->pc() += 4;
1931		return;
1932		}
1933
1934		// Get opcode and divide into fields
1935	<	uint32 opcode = *((uint32 *)r->nip);
1935	>	uint32 opcode = *((uint32 *)r->pc());
1936		uint32 primop = opcode >> 26;
1937		uint32 exop = (opcode >> 1) & 0x3ff;
1938		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1526 | Line 2021 | static void sigsegv_handler(int sig, sig
2021		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
2022		case 45:        // sthu
2023		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
2024	+	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
2025	+	case 46:        // lmw
2026	+	if ((addr % 4) != 0) {
2027	+	uint32 ea = addr;
2028	+	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
2029	+	for (int i = rd; i <= 31; i++) {
2030	+	r->gpr(i) = ReadMacInt32(ea);
2031	+	ea += 4;
2032	+	}
2033	+	r->pc() += 4;
2034	+	goto rti;
2035	+	}
2036	+	break;
2037	+	case 47:        // stmw
2038	+	if ((addr % 4) != 0) {
2039	+	uint32 ea = addr;
2040	+	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
2041	+	for (int i = rd; i <= 31; i++) {
2042	+	WriteMacInt32(ea, r->gpr(i));
2043	+	ea += 4;
2044	+	}
2045	+	r->pc() += 4;
2046	+	goto rti;
2047	+	}
2048	+	break;
2049	+	#endif
2050		}
2051
2052	<	// Ignore ROM writes
2053	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
2054	<	//                      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));
2052	>	// Ignore ROM writes (including to the zero page, which is read-only)
2053	>	if (transfer_type == TYPE_STORE &&
2054	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
2055	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
2056	>	//                      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()));
2057		if (addr_mode == MODE_U || addr_mode == MODE_UX)
2058	<	r->gpr[ra] = addr;
2059	<	r->nip += 4;
2058	>	r->gpr(ra) = addr;
2059	>	r->pc() += 4;
2060		goto rti;
2061		}
2062
2063		// Ignore illegal memory accesses?
2064		if (PrefsFindBool("ignoresegv")) {
2065		if (addr_mode == MODE_U || addr_mode == MODE_UX)
2066	<	r->gpr[ra] = addr;
2066	>	r->gpr(ra) = addr;
2067		if (transfer_type == TYPE_LOAD)
2068	<	r->gpr[rd] = 0;
2069	<	r->nip += 4;
2068	>	r->gpr(rd) = 0;
2069	>	r->pc() += 4;
2070		goto rti;
2071		}
2072
#	Line 1551 | Line 2074 | static void sigsegv_handler(int sig, sig
2074		if (!PrefsFindBool("nogui")) {
2075		char str[256];
2076		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
2077	<	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]);
2077	>	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));
2078		else
2079	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2079	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2080		ErrorAlert(str);
2081		QuitEmulator();
2082		return;
#	Line 1561 | Line 2084 | static void sigsegv_handler(int sig, sig
2084		}
2085
2086		// For all other errors, jump into debugger (sort of...)
2087	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
2088		if (!ready_for_signals) {
2089	<	printf("SIGSEGV\n");
2090	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2089	>	printf("%s\n");
2090	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2091		printf(
2092		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2093		"  xer %08lx     cr %08lx  \n"
#	Line 1575 | Line 2099 | static void sigsegv_handler(int sig, sig
2099		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2100		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2101		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2102	<	r->nip, r->link, r->ctr, r->msr,
2103	<	r->xer, r->ccr,
2104	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2105	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2106	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2107	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2108	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2109	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2110	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2111	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2102	>	crash_reason,
2103	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2104	>	r->xer(), r->cr(),
2105	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2106	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2107	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2108	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2109	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2110	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2111	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2112	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2113		exit(1);
2114		QuitEmulator();
2115		return;
2116		} else {
2117		// We crashed. Save registers, tell tick thread and loop forever
2118	<	sigsegv_regs = *(sigregs *)r;
2118	>	build_sigregs(&sigsegv_regs, r);
2119		emul_thread_fatal = true;
2120		for (;;) ;
2121		}
#	Line 1602 | Line 2127 | rti:;
2127		*  SIGILL handler
2128		*/
2129
2130	<	static void sigill_handler(int sig, sigcontext_struct *sc)
2130	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
2131		{
2132	<	pt_regs *r = sc->regs;
2132	>	machine_regs *r = MACHINE_REGISTERS(scp);
2133		char str[256];
2134
2135		// Fault in Mac ROM or RAM?
2136	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
2136	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
2137		if (mac_fault) {
2138
2139		// Get opcode and divide into fields
2140	<	uint32 opcode = *((uint32 *)r->nip);
2140	>	uint32 opcode = *((uint32 *)r->pc());
2141		uint32 primop = opcode >> 26;
2142		uint32 exop = (opcode >> 1) & 0x3ff;
2143		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1623 | Line 2148 | static void sigill_handler(int sig, sigc
2148		switch (primop) {
2149		case 9:         // POWER instructions
2150		case 22:
2151	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
2151	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
2152		ErrorAlert(str);
2153		QuitEmulator();
2154		return;
#	Line 1631 | Line 2156 | power_inst:            sprintf(str, GetString(STR_
2156		case 31:
2157		switch (exop) {
2158		case 83:        // mfmsr
2159	<	r->gpr[rd] = 0xf072;
2160	<	r->nip += 4;
2159	>	r->gpr(rd) = 0xf072;
2160	>	r->pc() += 4;
2161		goto rti;
2162
2163		case 210:       // mtsr
2164		case 242:       // mtsrin
2165		case 306:       // tlbie
2166	<	r->nip += 4;
2166	>	r->pc() += 4;
2167		goto rti;
2168
2169		case 339: {     // mfspr
#	Line 1654 | Line 2179 | power_inst:            sprintf(str, GetString(STR_
2179		case 957:       // PMC3
2180		case 958:       // PMC4
2181		case 959:       // SDA
2182	<	r->nip += 4;
2182	>	r->pc() += 4;
2183		goto rti;
2184		case 25:        // SDR1
2185	<	r->gpr[rd] = 0xdead001f;
2186	<	r->nip += 4;
2185	>	r->gpr(rd) = 0xdead001f;
2186	>	r->pc() += 4;
2187		goto rti;
2188		case 287:       // PVR
2189	<	r->gpr[rd] = PVR;
2190	<	r->nip += 4;
2189	>	r->gpr(rd) = PVR;
2190	>	r->pc() += 4;
2191		goto rti;
2192		}
2193		break;
#	Line 1698 | Line 2223 | power_inst:            sprintf(str, GetString(STR_
2223		case 957:       // PMC3
2224		case 958:       // PMC4
2225		case 959:       // SDA
2226	<	r->nip += 4;
2226	>	r->pc() += 4;
2227		goto rti;
2228		}
2229		break;
#	Line 1717 | Line 2242 | power_inst:            sprintf(str, GetString(STR_
2242
2243		// In GUI mode, show error alert
2244		if (!PrefsFindBool("nogui")) {
2245	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2245	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2246		ErrorAlert(str);
2247		QuitEmulator();
2248		return;
#	Line 1725 | Line 2250 | power_inst:            sprintf(str, GetString(STR_
2250		}
2251
2252		// For all other errors, jump into debugger (sort of...)
2253	+	crash_reason = "SIGILL";
2254		if (!ready_for_signals) {
2255	<	printf("SIGILL\n");
2256	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2255	>	printf("%s\n");
2256	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2257		printf(
2258		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2259		"  xer %08lx     cr %08lx  \n"
#	Line 1739 | Line 2265 | power_inst:            sprintf(str, GetString(STR_
2265		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2266		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2267		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2268	<	r->nip, r->link, r->ctr, r->msr,
2269	<	r->xer, r->ccr,
2270	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2271	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2272	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2273	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2274	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2275	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2276	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2277	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2268	>	crash_reason,
2269	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2270	>	r->xer(), r->cr(),
2271	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2272	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2273	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2274	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2275	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2276	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2277	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2278	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2279		exit(1);
2280		QuitEmulator();
2281		return;
2282		} else {
2283		// We crashed. Save registers, tell tick thread and loop forever
2284	<	sigsegv_regs = *(sigregs *)r;
2284	>	build_sigregs(&sigsegv_regs, r);
2285		emul_thread_fatal = true;
2286		for (;;) ;
2287		}
#	Line 1764 | Line 2291 | rti:;
2291
2292
2293		/*
2294	+	*  Helpers to share 32-bit addressable data with MacOS
2295	+	*/
2296	+
2297	+	bool SheepMem::Init(void)
2298	+	{
2299	+	// Size of a native page
2300	+	page_size = getpagesize();
2301	+
2302	+	// Allocate SheepShaver globals
2303	+	proc = base;
2304	+	if (vm_mac_acquire(base, size) < 0)
2305	+	return false;
2306	+
2307	+	// Allocate page with all bits set to 0, right in the middle
2308	+	// This is also used to catch undesired overlaps between proc and data areas
2309	+	zero_page = proc + (size / 2);
2310	+	Mac_memset(zero_page, 0, page_size);
2311	+	if (vm_protect(Mac2HostAddr(zero_page), page_size, VM_PAGE_READ) < 0)
2312	+	return false;
2313	+
2314	+	#if EMULATED_PPC
2315	+	// Allocate alternate stack for PowerPC interrupt routine
2316	+	sig_stack = base + size;
2317	+	if (vm_mac_acquire(sig_stack, SIG_STACK_SIZE) < 0)
2318	+	return false;
2319	+	#endif
2320	+
2321	+	data = base + size;
2322	+	return true;
2323	+	}
2324	+
2325	+	void SheepMem::Exit(void)
2326	+	{
2327	+	if (data) {
2328	+	// Delete SheepShaver globals
2329	+	vm_mac_release(base, size);
2330	+
2331	+	#if EMULATED_PPC
2332	+	// Delete alternate stack for PowerPC interrupt routine
2333	+	vm_mac_release(sig_stack, SIG_STACK_SIZE);
2334	+	#endif
2335	+	}
2336	+	}
2337	+
2338	+
2339	+	/*
2340		*  Display alert
2341		*/
2342
#	Line 1812 | Line 2385 | void display_alert(int title_id, int pre
2385
2386		void ErrorAlert(const char *text)
2387		{
2388	<	#ifdef ENABLE_GTK
2388	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2389		if (PrefsFindBool("nogui") || x_display == NULL) {
2390		printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2391		return;
#	Line 1831 | Line 2404 | void ErrorAlert(const char *text)
2404
2405		void WarningAlert(const char *text)
2406		{
2407	<	#ifdef ENABLE_GTK
2407	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2408		if (PrefsFindBool("nogui") || x_display == NULL) {
2409		printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2410		return;

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