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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 1.42 by gbeauche, 2004-06-24T15:37:25Z

#	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 USE_SDL
131	+	#include <SDL.h>
132	+	#endif
133	+
134	+	#ifndef USE_SDL_VIDEO
135		#include <X11/Xlib.h>
136	+	#endif
137
138		#ifdef ENABLE_GTK
139		#include <gtk/gtk.h>
#	Line 131 | Line 150
150		#endif
151
152
153	+	// Enable emulation of unaligned lmw/stmw?
154	+	#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
155	+
156		// Enable Execute68k() safety checks?
157		#define SAFE_EXEC_68K 0
158
#	Line 140 | Line 162
162		// Interrupts in native mode?
163		#define INTERRUPTS_IN_NATIVE_MODE 1
164
165	+	// Number of alternate stacks for signal handlers?
166	+	#define SIG_STACK_COUNT 4
167	+
168
169		// Constants
170		const char ROM_FILE_NAME[] = "ROM";
171		const char ROM_FILE_NAME2[] = "Mac OS ROM";
172
173	<	const uint32 RAM_BASE = 0x20000000;                     // Base address of RAM
173	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
174		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
175
176
177		#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	–
178		struct sigregs {
179	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
180	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
181	<	//more (uninteresting) stuff following here
179	>	uint32 nip;
180	>	uint32 link;
181	>	uint32 ctr;
182	>	uint32 msr;
183	>	uint32 xer;
184	>	uint32 ccr;
185	>	uint32 gpr[32];
186	>	};
187	>
188	>	#if defined(__linux__)
189	>	#include <sys/ucontext.h>
190	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
191	>
192	>	struct machine_regs : public pt_regs
193	>	{
194	>	u_long & cr()                           { return pt_regs::ccr; }
195	>	uint32 cr() const                       { return pt_regs::ccr; }
196	>	uint32 lr() const                       { return pt_regs::link; }
197	>	uint32 ctr() const                      { return pt_regs::ctr; }
198	>	uint32 xer() const                      { return pt_regs::xer; }
199	>	uint32 msr() const                      { return pt_regs::msr; }
200	>	uint32 dar() const                      { return pt_regs::dar; }
201	>	u_long & pc()                           { return pt_regs::nip; }
202	>	uint32 pc() const                       { return pt_regs::nip; }
203	>	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
204	>	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
205	>	};
206	>	#endif
207	>
208	>	#if defined(__APPLE__) && defined(__MACH__)
209	>	#include <sys/signal.h>
210	>	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
211	>
212	>	#include <sys/ucontext.h>
213	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
214	>
215	>	struct machine_regs : public mcontext
216	>	{
217	>	uint32 & cr()                           { return ss.cr; }
218	>	uint32 cr() const                       { return ss.cr; }
219	>	uint32 lr() const                       { return ss.lr; }
220	>	uint32 ctr() const                      { return ss.ctr; }
221	>	uint32 xer() const                      { return ss.xer; }
222	>	uint32 msr() const                      { return ss.srr1; }
223	>	uint32 dar() const                      { return es.dar; }
224	>	uint32 & pc()                           { return ss.srr0; }
225	>	uint32 pc() const                       { return ss.srr0; }
226	>	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
227	>	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
228		};
229		#endif
230
231	+	static void build_sigregs(sigregs *srp, machine_regs *mrp)
232	+	{
233	+	srp->nip = mrp->pc();
234	+	srp->link = mrp->lr();
235	+	srp->ctr = mrp->ctr();
236	+	srp->msr = mrp->msr();
237	+	srp->xer = mrp->xer();
238	+	srp->ccr = mrp->cr();
239	+	for (int i = 0; i < 32; i++)
240	+	srp->gpr[i] = mrp->gpr(i);
241	+	}
242	+
243	+	static struct sigaltstack sig_stacks[SIG_STACK_COUNT];  // Stacks for signal handlers
244	+	static int sig_stack_id = 0;                                                    // Stack slot currently used
245	+
246	+	static inline void sig_stack_acquire(void)
247	+	{
248	+	if (++sig_stack_id == SIG_STACK_COUNT) {
249	+	printf("FATAL: signal stack overflow\n");
250	+	return;
251	+	}
252	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
253	+	}
254	+
255	+	static inline void sig_stack_release(void)
256	+	{
257	+	if (--sig_stack_id < 0) {
258	+	printf("FATAL: signal stack underflow\n");
259	+	return;
260	+	}
261	+	sigaltstack(&sig_stacks[sig_stack_id], NULL);
262	+	}
263	+	#endif
264	+
265
266		// Global variables (exported)
267		#if !EMULATED_PPC
#	Line 172 | Line 269 | void *TOC;                             // Small data pointer (r13
269		#endif
270		uint32 RAMBase;                 // Base address of Mac RAM
271		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
272		uint32 KernelDataAddr;  // Address of Kernel Data
273		uint32 BootGlobsAddr;   // Address of BootGlobs structure at top of Mac RAM
274	+	uint32 DRCacheAddr;             // Address of DR Cache
275		uint32 PVR;                             // Theoretical PVR
276		int64 CPUClockSpeed;    // Processor clock speed (Hz)
277		int64 BusClockSpeed;    // Bus clock speed (Hz)
278
279
280		// Global variables
281	+	#ifndef USE_SDL_VIDEO
282		char *x_display_name = NULL;                            // X11 display name
283		Display *x_display = NULL;                                      // X11 display handle
284	+	#ifdef X11_LOCK_TYPE
285	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
286	+	#endif
287	+	#endif
288
289		static int zero_fd = 0;                                         // FD of /dev/zero
190	–	static bool sheep_area_mapped = false;          // Flag: SheepShaver data area mmap()ed
290		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
291		static int kernel_area = -1;                            // SHM ID of Kernel Data area
292		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
293		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
294	+	static bool dr_cache_area_mapped = false;       // Flag: Mac DR Cache mmap()ped
295	+	static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
296		static KernelData *kernel_data;                         // Pointer to Kernel Data
297		static EmulatorData *emulator_data;
298
299		static uint8 last_xpram[XPRAM_SIZE];            // Buffer for monitoring XPRAM changes
300
301		static bool nvram_thread_active = false;        // Flag: NVRAM watchdog installed
302	+	static volatile bool nvram_thread_cancel;       // Flag: Cancel NVRAM thread
303		static pthread_t nvram_thread;                          // NVRAM watchdog
304		static bool tick_thread_active = false;         // Flag: MacOS thread installed
305	+	static volatile bool tick_thread_cancel;        // Flag: Cancel 60Hz thread
306		static pthread_t tick_thread;                           // 60Hz thread
307		static pthread_t emul_thread;                           // MacOS thread
308
#	Line 207 | Line 310 | static bool ready_for_signals = false;
310		static int64 num_segv = 0;                                      // Number of handled SEGV signals
311
312		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
313	<	#if !EMULATED_PPC
313	>	#if EMULATED_PPC
314	>	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
315	>	#else
316		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
317		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
318		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
319		static sigregs sigsegv_regs;                            // Register dump when crashed
320	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
321		#endif
322
323	+	uint32  SheepMem::page_size;                            // Size of a native page
324	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
325	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
326	+	uintptr SheepMem::top = 0;                                      // Top of SheepShaver data (stack like storage)
327	+
328
329		// Prototypes
330		static void Quit(void);
#	Line 223 | Line 332 | static void *emul_func(void *arg);
332		static void *nvram_func(void *arg);
333		static void *tick_func(void *arg);
334		#if EMULATED_PPC
226	–	static void sigusr2_handler(int sig);
335		extern void emul_ppc(uint32 start);
336		extern void init_emul_ppc(void);
337		extern void exit_emul_ppc(void);
338		#else
339	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
340	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
341	<	static void sigill_handler(int sig, sigcontext_struct *sc);
339	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
340	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
341	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
342		#endif
343
344
#	Line 252 | Line 360 | extern void paranoia_check(void);
360
361		#if EMULATED_PPC
362		/*
363	+	*  Return signal stack base
364	+	*/
365	+
366	+	uintptr SignalStackBase(void)
367	+	{
368	+	return sig_stack + SIG_STACK_SIZE;
369	+	}
370	+
371	+
372	+	/*
373		*  Atomic operations
374		*/
375
#	Line 342 | Line 460 | int main(int argc, char **argv)
460		for (int i=1; i<argc; i++) {
461		if (strcmp(argv[i], "--help") == 0) {
462		usage(argv[0]);
463	+	#ifndef USE_SDL_VIDEO
464		} else if (strcmp(argv[i], "--display") == 0) {
465		i++;
466		if (i < argc)
467		x_display_name = strdup(argv[i]);
468	+	#endif
469		} else if (argv[i][0] == '-') {
470		fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
471		usage(argv[0]);
472		}
473		}
474
475	+	#ifdef USE_SDL
476	+	// Initialize SDL system
477	+	int sdl_flags = 0;
478	+	#ifdef USE_SDL_VIDEO
479	+	sdl_flags |= SDL_INIT_VIDEO;
480	+	#endif
481	+	assert(sdl_flags != 0);
482	+	if (SDL_Init(sdl_flags) == -1) {
483	+	char str[256];
484	+	sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
485	+	ErrorAlert(str);
486	+	goto quit;
487	+	}
488	+	atexit(SDL_Quit);
489	+	#endif
490	+
491	+	#ifndef USE_SDL_VIDEO
492		// Open display
493		x_display = XOpenDisplay(x_display_name);
494		if (x_display == NULL) {
#	Line 365 | Line 502 | int main(int argc, char **argv)
502		// Fork out, so we can return from fullscreen mode when things get ugly
503		XF86DGAForkApp(DefaultScreen(x_display));
504		#endif
505	+	#endif
506
507		#ifdef ENABLE_MON
508		// Initialize mon
#	Line 375 | Line 513 | int main(int argc, char **argv)
513		PVR = 0x00040000;                       // Default: 604
514		CPUClockSpeed = 100000000;      // Default: 100MHz
515		BusClockSpeed = 100000000;      // Default: 100MHz
516	<	#if !EMULATED_PPC
516	>	#if EMULATED_PPC
517	>	PVR = 0x000c0000;                       // Default: 7400 (with AltiVec)
518	>	#elif defined(__APPLE__) && defined(__MACH__)
519	>	proc_file = popen("ioreg -c IOPlatformDevice", "r");
520	>	if (proc_file) {
521	>	char line[256];
522	>	bool powerpc_node = false;
523	>	while (fgets(line, sizeof(line) - 1, proc_file)) {
524	>	// Read line
525	>	int len = strlen(line);
526	>	if (len == 0)
527	>	continue;
528	>	line[len - 1] = 0;
529	>
530	>	// Parse line
531	>	if (strstr(line, "o PowerPC,"))
532	>	powerpc_node = true;
533	>	else if (powerpc_node) {
534	>	uint32 value;
535	>	char head[256];
536	>	if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
537	>	PVR = value;
538	>	else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
539	>	CPUClockSpeed = value;
540	>	else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
541	>	BusClockSpeed = value;
542	>	else if (strchr(line, '}'))
543	>	powerpc_node = false;
544	>	}
545	>	}
546	>	fclose(proc_file);
547	>	} else {
548	>	sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
549	>	WarningAlert(str);
550	>	}
551	>	#else
552		proc_file = fopen("/proc/cpuinfo", "r");
553		if (proc_file) {
554		char line[256];
#	Line 389 | Line 562 | int main(int argc, char **argv)
562		// Parse line
563		int i;
564		char value[256];
565	<	if (sscanf(line, "cpu : %s", value) == 1) {
565	>	if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
566		if (strcmp(value, "601") == 0)
567		PVR = 0x00010000;
568		else if (strcmp(value, "603") == 0)
#	Line 410 | Line 583 | int main(int argc, char **argv)
583		PVR = 0x00320000;
584		else if (strcmp(value, "860") == 0)
585		PVR = 0x00500000;
586	+	else if (strcmp(value, "7400") == 0)
587	+	PVR = 0x000c0000;
588	+	else if (strcmp(value, "7410") == 0)
589	+	PVR = 0x800c0000;
590		else
591		printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
592		}
#	Line 421 | Line 598 | int main(int argc, char **argv)
598		sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
599		WarningAlert(str);
600		}
601	+
602	+	// Get actual bus frequency
603	+	proc_file = fopen("/proc/device-tree/clock-frequency", "r");
604	+	if (proc_file) {
605	+	union { uint8 b[4]; uint32 l; } value;
606	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
607	+	BusClockSpeed = value.l;
608	+	fclose(proc_file);
609	+	}
610		#endif
611		D(bug("PVR: %08x (assumed)\n", PVR));
612
#	Line 445 | Line 631 | int main(int argc, char **argv)
631		goto quit;
632		}
633
634	+	#ifndef PAGEZERO_HACK
635		// Create Low Memory area (0x0000..0x3000)
636		if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
637		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
#	Line 452 | Line 639 | int main(int argc, char **argv)
639		goto quit;
640		}
641		lm_area_mapped = true;
642	+	#endif
643
644		// Create areas for Kernel Data
645		kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
#	Line 470 | Line 658 | int main(int argc, char **argv)
658		ErrorAlert(str);
659		goto quit;
660		}
661	<	kernel_data = (KernelData *)0x68ffe000;
661	>	kernel_data = (KernelData *)KERNEL_DATA_BASE;
662		emulator_data = &kernel_data->ed;
663	<	KernelDataAddr = (uint32)kernel_data;
663	>	KernelDataAddr = KERNEL_DATA_BASE;
664		D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
665
666	+	// Create area for DR Cache
667	+	if (vm_acquire_fixed((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
668	+	sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
669	+	ErrorAlert(str);
670	+	goto quit;
671	+	}
672	+	dr_emulator_area_mapped = true;
673	+	if (vm_acquire_fixed((void *)DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
674	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
675	+	ErrorAlert(str);
676	+	goto quit;
677	+	}
678	+	dr_cache_area_mapped = true;
679	+	#if !EMULATED_PPC
680	+	if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
681	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
682	+	ErrorAlert(str);
683	+	goto quit;
684	+	}
685	+	#endif
686	+	DRCacheAddr = DR_CACHE_BASE;
687	+	D(bug("DR Cache at %p\n", DRCacheAddr));
688	+
689		// Create area for SheepShaver data
690	<	if (vm_acquire_fixed((char *)SHEEP_BASE, SHEEP_SIZE) < 0) {
690	>	if (!SheepMem::Init()) {
691		sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
692		ErrorAlert(str);
693		goto quit;
694		}
484	–	SheepStack1Base = SHEEP_BASE + 0x10000;
485	–	SheepStack2Base = SheepStack1Base + 0x10000;
486	–	SheepThunksBase = SheepStack2Base + 0x1000;
487	–	sheep_area_mapped = true;
695
696		// Create area for Mac ROM
697		if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
#	Line 492 | Line 699 | int main(int argc, char **argv)
699		ErrorAlert(str);
700		goto quit;
701		}
702	<	#if !EMULATED_PPC || defined(__powerpc__)
702	>	#if !EMULATED_PPC
703		if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
704		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
705		ErrorAlert(str);
#	Line 562 | Line 769 | int main(int argc, char **argv)
769		// Load NVRAM
770		XPRAMInit();
771
772	+	// Load XPRAM default values if signature not found
773	+	if (XPRAM[0x130c] != 0x4e || XPRAM[0x130d] != 0x75
774	+	|| XPRAM[0x130e] != 0x4d || XPRAM[0x130f] != 0x63) {
775	+	D(bug("Loading XPRAM default values\n"));
776	+	memset(XPRAM + 0x1300, 0, 0x100);
777	+	XPRAM[0x130c] = 0x4e;   // "NuMc" signature
778	+	XPRAM[0x130d] = 0x75;
779	+	XPRAM[0x130e] = 0x4d;
780	+	XPRAM[0x130f] = 0x63;
781	+	XPRAM[0x1301] = 0x80;   // InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
782	+	XPRAM[0x1310] = 0xa8;   // Standard PRAM values
783	+	XPRAM[0x1311] = 0x00;
784	+	XPRAM[0x1312] = 0x00;
785	+	XPRAM[0x1313] = 0x22;
786	+	XPRAM[0x1314] = 0xcc;
787	+	XPRAM[0x1315] = 0x0a;
788	+	XPRAM[0x1316] = 0xcc;
789	+	XPRAM[0x1317] = 0x0a;
790	+	XPRAM[0x131c] = 0x00;
791	+	XPRAM[0x131d] = 0x02;
792	+	XPRAM[0x131e] = 0x63;
793	+	XPRAM[0x131f] = 0x00;
794	+	XPRAM[0x1308] = 0x13;
795	+	XPRAM[0x1309] = 0x88;
796	+	XPRAM[0x130a] = 0x00;
797	+	XPRAM[0x130b] = 0xcc;
798	+	XPRAM[0x1376] = 0x00;   // OSDefault = MacOS
799	+	XPRAM[0x1377] = 0x01;
800	+	}
801	+
802		// Set boot volume
803		i16 = PrefsFindInt32("bootdrive");
804		XPRAM[0x1378] = i16 >> 8;
#	Line 579 | Line 816 | int main(int argc, char **argv)
816		boot_globs[1] = htonl(RAMSize);
817		boot_globs[2] = htonl((uint32)-1);                      // End of bank table
818
819	+	// Init thunks
820	+	if (!ThunksInit())
821	+	goto quit;
822	+
823		// Init drivers
824		SonyInit();
825		DiskInit();
#	Line 588 | Line 829 | int main(int argc, char **argv)
829		// Init external file system
830		ExtFSInit();
831
832	+	// Init ADB
833	+	ADBInit();
834	+
835		// Init audio
836		AudioInit();
837
#	Line 622 | Line 866 | int main(int argc, char **argv)
866		// Initialize Kernel Data
867		memset(kernel_data, 0, sizeof(KernelData));
868		if (ROMType == ROMTYPE_NEWWORLD) {
869	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
870	<	static uint8 vector_lookup_tbl[128];
871	<	static uint8 vector_mask_tbl[64];
869	>	uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
870	>	memset((void *)of_dev_tree, 0, 4 * sizeof(uint32));
871	>	uintptr vector_lookup_tbl = SheepMem::Reserve(128);
872	>	uintptr vector_mask_tbl = SheepMem::Reserve(64);
873		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
874	<	memset(vector_lookup_tbl, 0, 128);
875	<	memset(vector_mask_tbl, 0, 64);
874	>	memset((void *)vector_lookup_tbl, 0, 128);
875	>	memset((void *)vector_mask_tbl, 0, 64);
876		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
877	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
878	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
879	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
877	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree);                        // OF device tree base
878	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
879	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
880		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
881		kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
882		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 644 | Line 889 | int main(int argc, char **argv)
889		kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
890		kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
891		kernel_data->v[0xf60 >> 2] = htonl(PVR);
892	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
893	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
894	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
892	>	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
893	>	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
894	>	kernel_data->v[0xf6c >> 2] = htonl(BusClockSpeed / 4);          // timebase-frequency
895		} else {
896		kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
897		kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
#	Line 658 | Line 903 | int main(int argc, char **argv)
903		kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
904		kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
905		kernel_data->v[0xf80 >> 2] = htonl(PVR);
906	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
907	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
908	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
906	>	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
907	>	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
908	>	kernel_data->v[0xf8c >> 2] = htonl(BusClockSpeed / 4);          // timebase-frequency
909		}
910
911		// Initialize extra low memory
912		D(bug("Initializing Low Memory...\n"));
913		memset(NULL, 0, 0x3000);
914		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
915	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
915	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr);                                 // For trap replacement routines
916		WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
917		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
918		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
919	<	#if EMULATED_PPC
920	<	WriteMacInt32(XLM_ETHER_INIT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_INIT));
921	<	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);
919	>	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage());                             // Pointer to read-only page with all bits set to 0
920	>	#if !EMULATED_PPC
921	>	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                            // TOC pointer of emulator
922		#endif
923	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT));       // DLPI ethernet driver functions
924	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
925	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
926	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
927	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
928	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
929	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
930		D(bug("Low Memory initialized\n"));
931
932		// Start 60Hz thread
933	+	tick_thread_cancel = false;
934		tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
935		D(bug("Tick thread installed (%ld)\n", tick_thread));
936
937		// Start NVRAM watchdog thread
938		memcpy(last_xpram, XPRAM, XPRAM_SIZE);
939	+	nvram_thread_cancel = false;
940		nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
941		D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
942
943		#if !EMULATED_PPC
944		// Create and install stacks for signal handlers
945	<	sig_stack = malloc(SIG_STACK_SIZE);
946	<	D(bug("Signal stack at %p\n", sig_stack));
947	<	if (sig_stack == NULL) {
948	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
949	<	goto quit;
950	<	}
951	<	extra_stack = malloc(SIG_STACK_SIZE);
952	<	D(bug("Extra stack at %p\n", extra_stack));
953	<	if (extra_stack == NULL) {
954	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
955	<	goto quit;
956	<	}
957	<	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) {
945	>	for (int i = 0; i < SIG_STACK_COUNT; i++) {
946	>	void *sig_stack = malloc(SIG_STACK_SIZE);
947	>	D(bug("Signal stack %d at %p\n", i, sig_stack));
948	>	if (sig_stack == NULL) {
949	>	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
950	>	goto quit;
951	>	}
952	>	sig_stacks[i].ss_sp = sig_stack;
953	>	sig_stacks[i].ss_flags = 0;
954	>	sig_stacks[i].ss_size = SIG_STACK_SIZE;
955	>	}
956	>	sig_stack_id = 0;
957	>	if (sigaltstack(&sig_stacks[0], NULL) < 0) {
958		sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
959		ErrorAlert(str);
960		goto quit;
#	Line 726 | Line 962 | int main(int argc, char **argv)
962		#endif
963
964		#if !EMULATED_PPC
965	<	// Install SIGSEGV handler
965	>	// Install SIGSEGV and SIGBUS handlers
966		sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
967		sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
968	<	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
969	<	sigsegv_action.sa_flags = SA_ONSTACK;
968	>	sigsegv_action.sa_sigaction = sigsegv_handler;
969	>	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
970	>	#ifdef HAVE_SIGNAL_SA_RESTORER
971		sigsegv_action.sa_restorer = NULL;
972	+	#endif
973		if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
974		sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
975		ErrorAlert(str);
976		goto quit;
977		}
978	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
979	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
980	+	ErrorAlert(str);
981	+	goto quit;
982	+	}
983
984		// Install SIGILL handler
985		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
986		sigaddset(&sigill_action.sa_mask, SIGUSR2);
987	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
988	<	sigill_action.sa_flags = SA_ONSTACK;
987	>	sigill_action.sa_sigaction = sigill_handler;
988	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
989	>	#ifdef HAVE_SIGNAL_SA_RESTORER
990		sigill_action.sa_restorer = NULL;
991	+	#endif
992		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
993		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
994		ErrorAlert(str);
#	Line 751 | Line 996 | int main(int argc, char **argv)
996		}
997		#endif
998
999	+	#if !EMULATED_PPC
1000		// Install interrupt signal handler
1001		sigemptyset(&sigusr2_action.sa_mask);
1002	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
1003	<	sigusr2_action.sa_flags = 0;
1004	<	#if !EMULATED_PPC
759	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
760	<	#endif
1002	>	sigusr2_action.sa_sigaction = sigusr2_handler;
1003	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
1004	>	#ifdef HAVE_SIGNAL_SA_RESTORER
1005		sigusr2_action.sa_restorer = NULL;
1006	+	#endif
1007		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
1008		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
1009		ErrorAlert(str);
1010		goto quit;
1011		}
1012	+	#endif
1013
1014		// Get my thread ID and execute MacOS thread function
1015		emul_thread = pthread_self();
#	Line 789 | Line 1035 | static void Quit(void)
1035
1036		// Stop 60Hz thread
1037		if (tick_thread_active) {
1038	+	tick_thread_cancel = true;
1039		pthread_cancel(tick_thread);
1040		pthread_join(tick_thread, NULL);
1041		}
1042
1043		// Stop NVRAM watchdog thread
1044		if (nvram_thread_active) {
1045	+	nvram_thread_cancel = true;
1046		pthread_cancel(nvram_thread);
1047		pthread_join(nvram_thread, NULL);
1048		}
1049
1050		#if !EMULATED_PPC
1051	<	// Uninstall SIGSEGV handler
1051	>	// Uninstall SIGSEGV and SIGBUS handlers
1052		sigemptyset(&sigsegv_action.sa_mask);
1053		sigsegv_action.sa_handler = SIG_DFL;
1054		sigsegv_action.sa_flags = 0;
1055		sigaction(SIGSEGV, &sigsegv_action, NULL);
1056	+	sigaction(SIGBUS, &sigsegv_action, NULL);
1057
1058		// Uninstall SIGILL handler
1059		sigemptyset(&sigill_action.sa_mask);
1060		sigill_action.sa_handler = SIG_DFL;
1061		sigill_action.sa_flags = 0;
1062		sigaction(SIGILL, &sigill_action, NULL);
1063	+
1064	+	// Delete stacks for signal handlers
1065	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
1066	+	void *sig_stack = sig_stacks[i].ss_sp;
1067	+	if (sig_stack)
1068	+	free(sig_stack);
1069	+	}
1070		#endif
1071
1072		// Save NVRAM
#	Line 831 | Line 1087 | static void Quit(void)
1087		// Exit audio
1088		AudioExit();
1089
1090	+	// Exit ADB
1091	+	ADBExit();
1092	+
1093		// Exit video
1094		VideoExit();
1095
#	Line 843 | Line 1102 | static void Quit(void)
1102		DiskExit();
1103		SonyExit();
1104
1105	+	// Delete thunks
1106	+	ThunksExit();
1107	+
1108	+	// Delete SheepShaver globals
1109	+	SheepMem::Exit();
1110	+
1111		// Delete RAM area
1112		if (ram_area_mapped)
1113		vm_release((char *)RAM_BASE, RAMSize);
#	Line 851 | Line 1116 | static void Quit(void)
1116		if (rom_area_mapped)
1117		vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1118
1119	+	// Delete DR cache areas
1120	+	if (dr_emulator_area_mapped)
1121	+	vm_release((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1122	+	if (dr_cache_area_mapped)
1123	+	vm_release((void *)DR_CACHE_BASE, DR_CACHE_SIZE);
1124	+
1125		// Delete Kernel Data area
1126		if (kernel_area >= 0) {
1127		shmdt((void *)KERNEL_DATA_BASE);
#	Line 878 | Line 1149 | static void Quit(void)
1149		#endif
1150
1151		// Close X11 server connection
1152	+	#ifndef USE_SDL_VIDEO
1153		if (x_display)
1154		XCloseDisplay(x_display);
1155	+	#endif
1156
1157		exit(0);
1158		}
#	Line 954 | Line 1227 | void Execute68kTrap(uint16 trap, M68kReg
1227		uint16 proc[2] = {trap, M68K_RTS};
1228		Execute68k((uint32)proc, r);
1229		}
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	–	}
1230		#endif
1231
1232
#	Line 1045 | Line 1305 | void MakeExecutable(int dummy, void *sta
1305
1306		void PatchAfterStartup(void)
1307		{
1048	–	#if EMULATED_PPC
1308		ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1050	–	#else
1051	–	ExecutePPC(VideoInstallAccel);
1052	–	#endif
1309		InstallExtFS();
1310		}
1311
#	Line 1058 | Line 1314 | void PatchAfterStartup(void)
1314		*  NVRAM watchdog thread (saves NVRAM every minute)
1315		*/
1316
1317	<	static void *nvram_func(void *arg)
1317	>	static void nvram_watchdog(void)
1318		{
1319	<	struct timespec req = {60, 0};  // 1 minute
1319	>	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1320	>	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1321	>	SaveXPRAM();
1322	>	}
1323	>	}
1324
1325	<	for (;;) {
1326	<	pthread_testcancel();
1327	<	nanosleep(&req, NULL);
1328	<	pthread_testcancel();
1329	<	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1330	<	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1071	<	SaveXPRAM();
1072	<	}
1325	>	static void *nvram_func(void *arg)
1326	>	{
1327	>	while (!nvram_thread_cancel) {
1328	>	for (int i=0; i<60 && !nvram_thread_cancel; i++)
1329	>	Delay_usec(999999);             // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1330	>	nvram_watchdog();
1331		}
1332		return NULL;
1333		}
#	Line 1082 | Line 1340 | static void *nvram_func(void *arg)
1340		static void *tick_func(void *arg)
1341		{
1342		int tick_counter = 0;
1343	<	struct timespec req = {0, 16625000};
1343	>	uint64 start = GetTicks_usec();
1344	>	int64 ticks = 0;
1345	>	uint64 next = GetTicks_usec();
1346
1347	<	for (;;) {
1347	>	while (!tick_thread_cancel) {
1348
1349		// Wait
1350	<	nanosleep(&req, NULL);
1350	>	next += 16625;
1351	>	int64 delay = next - GetTicks_usec();
1352	>	if (delay > 0)
1353	>	Delay_usec(delay);
1354	>	else if (delay < -16625)
1355	>	next = GetTicks_usec();
1356	>	ticks++;
1357
1358		#if !EMULATED_PPC
1359		// Did we crash?
1360		if (emul_thread_fatal) {
1361
1362		// Yes, dump registers
1363	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1363	>	sigregs *r = &sigsegv_regs;
1364		char str[256];
1365	<	sprintf(str, "SIGSEGV\n"
1365	>	if (crash_reason == NULL)
1366	>	crash_reason = "SIGSEGV";
1367	>	sprintf(str, "%s\n"
1368		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1369		"  xer %08lx     cr %08lx  \n"
1370		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1107 | Line 1375 | static void *tick_func(void *arg)
1375		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1376		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1377		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1378	+	crash_reason,
1379		r->nip, r->link, r->ctr, r->msr,
1380		r->xer, r->ccr,
1381		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1142 | Line 1411 | static void *tick_func(void *arg)
1411		TriggerInterrupt();
1412		}
1413		}
1414	+
1415	+	uint64 end = GetTicks_usec();
1416	+	D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1417		return NULL;
1418		}
1419
#	Line 1152 | Line 1424 | static void *tick_func(void *arg)
1424
1425		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1426		{
1427	<	// nothing to do
1427	>	#ifdef HAVE_PTHREADS
1428	>	pthread_attr_init(attr);
1429	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1430	>	// Some of these only work for superuser
1431	>	if (geteuid() == 0) {
1432	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1433	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1434	>	struct sched_param fifo_param;
1435	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1436	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1437	>	priority);
1438	>	pthread_attr_setschedparam(attr, &fifo_param);
1439	>	}
1440	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1441	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1442	>	// If system scope is not available (eg. we're not running
1443	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1444	>	// scope.  It exposes pthread scheduling to the kernel,
1445	>	// without setting realtime priority.
1446	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1447	>	#endif
1448	>	}
1449	>	#endif
1450	>	#endif
1451		}
1452
1453
#	Line 1239 | Line 1534 | void B2_delete_mutex(B2_mutex *mutex)
1534		*  Trigger signal USR2 from another thread
1535		*/
1536
1537	<	#if !EMULATED_PPC || ASYNC_IRQ
1537	>	#if !EMULATED_PPC
1538		void TriggerInterrupt(void)
1539		{
1540		if (ready_for_signals)
#	Line 1271 | Line 1566 | void ClearInterruptFlag(uint32 flag)
1566
1567		void DisableInterrupt(void)
1568		{
1569	+	#if EMULATED_PPC
1570	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1571	+	#else
1572		atomic_add((int *)XLM_IRQ_NEST, 1);
1573	+	#endif
1574		}
1575
1576
#	Line 1281 | Line 1580 | void DisableInterrupt(void)
1580
1581		void EnableInterrupt(void)
1582		{
1583	+	#if EMULATED_PPC
1584	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1585	+	#else
1586		atomic_add((int *)XLM_IRQ_NEST, -1);
1587	+	#endif
1588		}
1589
1590
#	Line 1289 | Line 1592 | void EnableInterrupt(void)
1592		*  USR2 handler
1593		*/
1594
1595	<	#if EMULATED_PPC
1596	<	static void sigusr2_handler(int sig)
1595	>	#if !EMULATED_PPC
1596	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1597		{
1598	<	#if ASYNC_IRQ
1599	<	extern void HandleInterrupt(void);
1600	<	HandleInterrupt();
1598	>	machine_regs *r = MACHINE_REGISTERS(scp);
1599	>
1600	>	#ifdef USE_SDL_VIDEO
1601	>	// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
1602	>	SDL_PumpEvents();
1603		#endif
1299	–	}
1300	–	#else
1301	–	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1302	–	{
1303	–	pt_regs *r = sc->regs;
1604
1605		// Do nothing if interrupts are disabled
1606		if (*(int32 *)XLM_IRQ_NEST > 0)
#	Line 1314 | Line 1614 | static void sigusr2_handler(int sig, sig
1614		case MODE_68K:
1615		// 68k emulator active, trigger 68k interrupt level 1
1616		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1617	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1617	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1618		break;
1619
1620		#if INTERRUPTS_IN_NATIVE_MODE
1621		case MODE_NATIVE:
1622		// 68k emulator inactive, in nanokernel?
1623	<	if (r->gpr[1] != KernelDataAddr) {
1623	>	if (r->gpr(1) != KernelDataAddr) {
1624	>
1625	>	// Set extra stack for nested interrupts
1626	>	sig_stack_acquire();
1627	>
1628		// Prepare for 68k interrupt level 1
1629		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1630		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1631
1632		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1633	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1633	>	DisableInterrupt();
1634		if (ROMType == ROMTYPE_NEWWORLD)
1635		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1636		else
1637		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1638	+
1639	+	// Reset normal signal stack
1640	+	sig_stack_release();
1641		}
1642		break;
1643		#endif
#	Line 1341 | Line 1648 | static void sigusr2_handler(int sig, sig
1648		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1649
1650		// Set extra stack for SIGSEGV handler
1651	<	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);
1651	>	sig_stack_acquire();
1652		#if 1
1653		// Execute full 68k interrupt routine
1654		M68kRegisters r;
#	Line 1367 | Line 1670 | static void sigusr2_handler(int sig, sig
1670		if (InterruptFlags & INTFLAG_VIA) {
1671		ClearInterruptFlag(INTFLAG_VIA);
1672		ADBInterrupt();
1673	<	ExecutePPC(VideoVBL);
1673	>	ExecuteNative(NATIVE_VIDEO_VBL);
1674		}
1675		}
1676		#endif
1677		// Reset normal signal stack
1678	<	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);
1678	>	sig_stack_release();
1679		}
1680		break;
1681		#endif
#	Line 1389 | Line 1689 | static void sigusr2_handler(int sig, sig
1689		*/
1690
1691		#if !EMULATED_PPC
1692	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1692	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1693		{
1694	<	pt_regs *r = sc->regs;
1694	>	machine_regs *r = MACHINE_REGISTERS(scp);
1695
1696		// Get effective address
1697	<	uint32 addr = r->dar;
1697	>	uint32 addr = r->dar();
1698
1699		#if ENABLE_VOSF
1700		// Handle screen fault.
1701		extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1702	<	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->nip))
1702	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1703		return;
1704		#endif
1705
1706		num_segv++;
1707
1708	<	// Fault in Mac ROM or RAM?
1709	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1708	>	// Fault in Mac ROM or RAM or DR Cache?
1709	>	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));
1710		if (mac_fault) {
1711
1712		// "VM settings" during MacOS 8 installation
1713	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1714	<	r->nip += 4;
1715	<	r->gpr[8] = 0;
1713	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1714	>	r->pc() += 4;
1715	>	r->gpr(8) = 0;
1716		return;
1717
1718		// MacOS 8.5 installation
1719	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1720	<	r->nip += 4;
1721	<	r->gpr[8] = 0;
1719	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1720	>	r->pc() += 4;
1721	>	r->gpr(8) = 0;
1722		return;
1723
1724		// MacOS 8 serial drivers on startup
1725	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1726	<	r->nip += 4;
1727	<	r->gpr[8] = 0;
1725	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1726	>	r->pc() += 4;
1727	>	r->gpr(8) = 0;
1728		return;
1729
1730		// MacOS 8.1 serial drivers on startup
1731	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1732	<	r->nip += 4;
1731	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1732	>	r->pc() += 4;
1733	>	return;
1734	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1735	>	r->pc() += 4;
1736	>	return;
1737	>
1738	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1739	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1740	>	r->pc() += 4;
1741		return;
1742	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1743	<	r->nip += 4;
1742	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1743	>	r->pc() += 4;
1744		return;
1745		}
1746
1747		// Get opcode and divide into fields
1748	<	uint32 opcode = *((uint32 *)r->nip);
1748	>	uint32 opcode = *((uint32 *)r->pc());
1749		uint32 primop = opcode >> 26;
1750		uint32 exop = (opcode >> 1) & 0x3ff;
1751		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1526 | Line 1834 | static void sigsegv_handler(int sig, sig
1834		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1835		case 45:        // sthu
1836		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1837	+	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1838	+	case 46:        // lmw
1839	+	if ((addr % 4) != 0) {
1840	+	uint32 ea = addr;
1841	+	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1842	+	for (int i = rd; i <= 31; i++) {
1843	+	r->gpr(i) = ReadMacInt32(ea);
1844	+	ea += 4;
1845	+	}
1846	+	r->pc() += 4;
1847	+	goto rti;
1848	+	}
1849	+	break;
1850	+	case 47:        // stmw
1851	+	if ((addr % 4) != 0) {
1852	+	uint32 ea = addr;
1853	+	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1854	+	for (int i = rd; i <= 31; i++) {
1855	+	WriteMacInt32(ea, r->gpr(i));
1856	+	ea += 4;
1857	+	}
1858	+	r->pc() += 4;
1859	+	goto rti;
1860	+	}
1861	+	break;
1862	+	#endif
1863		}
1864
1865	<	// Ignore ROM writes
1866	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1867	<	//                      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));
1865	>	// Ignore ROM writes (including to the zero page, which is read-only)
1866	>	if (transfer_type == TYPE_STORE &&
1867	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
1868	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1869	>	//                      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()));
1870		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1871	<	r->gpr[ra] = addr;
1872	<	r->nip += 4;
1871	>	r->gpr(ra) = addr;
1872	>	r->pc() += 4;
1873		goto rti;
1874		}
1875
1876		// Ignore illegal memory accesses?
1877		if (PrefsFindBool("ignoresegv")) {
1878		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1879	<	r->gpr[ra] = addr;
1879	>	r->gpr(ra) = addr;
1880		if (transfer_type == TYPE_LOAD)
1881	<	r->gpr[rd] = 0;
1882	<	r->nip += 4;
1881	>	r->gpr(rd) = 0;
1882	>	r->pc() += 4;
1883		goto rti;
1884		}
1885
#	Line 1551 | Line 1887 | static void sigsegv_handler(int sig, sig
1887		if (!PrefsFindBool("nogui")) {
1888		char str[256];
1889		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1890	<	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]);
1890	>	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));
1891		else
1892	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1892	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1893		ErrorAlert(str);
1894		QuitEmulator();
1895		return;
#	Line 1561 | Line 1897 | static void sigsegv_handler(int sig, sig
1897		}
1898
1899		// For all other errors, jump into debugger (sort of...)
1900	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1901		if (!ready_for_signals) {
1902	<	printf("SIGSEGV\n");
1903	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1902	>	printf("%s\n");
1903	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1904		printf(
1905		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1906		"  xer %08lx     cr %08lx  \n"
#	Line 1575 | Line 1912 | static void sigsegv_handler(int sig, sig
1912		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1913		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1914		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1915	<	r->nip, r->link, r->ctr, r->msr,
1916	<	r->xer, r->ccr,
1917	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1918	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1919	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1920	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1921	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1922	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1923	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1924	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1915	>	crash_reason,
1916	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1917	>	r->xer(), r->cr(),
1918	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1919	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1920	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1921	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1922	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1923	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1924	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1925	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1926		exit(1);
1927		QuitEmulator();
1928		return;
1929		} else {
1930		// We crashed. Save registers, tell tick thread and loop forever
1931	<	sigsegv_regs = *(sigregs *)r;
1931	>	build_sigregs(&sigsegv_regs, r);
1932		emul_thread_fatal = true;
1933		for (;;) ;
1934		}
#	Line 1602 | Line 1940 | rti:;
1940		*  SIGILL handler
1941		*/
1942
1943	<	static void sigill_handler(int sig, sigcontext_struct *sc)
1943	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
1944		{
1945	<	pt_regs *r = sc->regs;
1945	>	machine_regs *r = MACHINE_REGISTERS(scp);
1946		char str[256];
1947
1948		// Fault in Mac ROM or RAM?
1949	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1949	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1950		if (mac_fault) {
1951
1952		// Get opcode and divide into fields
1953	<	uint32 opcode = *((uint32 *)r->nip);
1953	>	uint32 opcode = *((uint32 *)r->pc());
1954		uint32 primop = opcode >> 26;
1955		uint32 exop = (opcode >> 1) & 0x3ff;
1956		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1623 | Line 1961 | static void sigill_handler(int sig, sigc
1961		switch (primop) {
1962		case 9:         // POWER instructions
1963		case 22:
1964	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
1964	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
1965		ErrorAlert(str);
1966		QuitEmulator();
1967		return;
#	Line 1631 | Line 1969 | power_inst:            sprintf(str, GetString(STR_
1969		case 31:
1970		switch (exop) {
1971		case 83:        // mfmsr
1972	<	r->gpr[rd] = 0xf072;
1973	<	r->nip += 4;
1972	>	r->gpr(rd) = 0xf072;
1973	>	r->pc() += 4;
1974		goto rti;
1975
1976		case 210:       // mtsr
1977		case 242:       // mtsrin
1978		case 306:       // tlbie
1979	<	r->nip += 4;
1979	>	r->pc() += 4;
1980		goto rti;
1981
1982		case 339: {     // mfspr
#	Line 1654 | Line 1992 | power_inst:            sprintf(str, GetString(STR_
1992		case 957:       // PMC3
1993		case 958:       // PMC4
1994		case 959:       // SDA
1995	<	r->nip += 4;
1995	>	r->pc() += 4;
1996		goto rti;
1997		case 25:        // SDR1
1998	<	r->gpr[rd] = 0xdead001f;
1999	<	r->nip += 4;
1998	>	r->gpr(rd) = 0xdead001f;
1999	>	r->pc() += 4;
2000		goto rti;
2001		case 287:       // PVR
2002	<	r->gpr[rd] = PVR;
2003	<	r->nip += 4;
2002	>	r->gpr(rd) = PVR;
2003	>	r->pc() += 4;
2004		goto rti;
2005		}
2006		break;
#	Line 1698 | Line 2036 | power_inst:            sprintf(str, GetString(STR_
2036		case 957:       // PMC3
2037		case 958:       // PMC4
2038		case 959:       // SDA
2039	<	r->nip += 4;
2039	>	r->pc() += 4;
2040		goto rti;
2041		}
2042		break;
#	Line 1717 | Line 2055 | power_inst:            sprintf(str, GetString(STR_
2055
2056		// In GUI mode, show error alert
2057		if (!PrefsFindBool("nogui")) {
2058	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2058	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2059		ErrorAlert(str);
2060		QuitEmulator();
2061		return;
#	Line 1725 | Line 2063 | power_inst:            sprintf(str, GetString(STR_
2063		}
2064
2065		// For all other errors, jump into debugger (sort of...)
2066	+	crash_reason = "SIGILL";
2067		if (!ready_for_signals) {
2068	<	printf("SIGILL\n");
2069	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2068	>	printf("%s\n");
2069	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2070		printf(
2071		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2072		"  xer %08lx     cr %08lx  \n"
#	Line 1739 | Line 2078 | power_inst:            sprintf(str, GetString(STR_
2078		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2079		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2080		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2081	<	r->nip, r->link, r->ctr, r->msr,
2082	<	r->xer, r->ccr,
2083	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2084	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2085	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2086	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2087	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2088	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2089	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2090	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2081	>	crash_reason,
2082	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2083	>	r->xer(), r->cr(),
2084	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2085	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2086	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2087	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2088	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2089	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2090	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2091	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2092		exit(1);
2093		QuitEmulator();
2094		return;
2095		} else {
2096		// We crashed. Save registers, tell tick thread and loop forever
2097	<	sigsegv_regs = *(sigregs *)r;
2097	>	build_sigregs(&sigsegv_regs, r);
2098		emul_thread_fatal = true;
2099		for (;;) ;
2100		}
#	Line 1764 | Line 2104 | rti:;
2104
2105
2106		/*
2107	+	*  Helpers to share 32-bit addressable data with MacOS
2108	+	*/
2109	+
2110	+	bool SheepMem::Init(void)
2111	+	{
2112	+	// Size of a native page
2113	+	page_size = getpagesize();
2114	+
2115	+	// Allocate SheepShaver globals
2116	+	if (vm_acquire_fixed((char *)base, size) < 0)
2117	+	return false;
2118	+
2119	+	// Allocate page with all bits set to 0
2120	+	zero_page = base + size;
2121	+	if (vm_acquire_fixed((char *)zero_page, page_size) < 0)
2122	+	return false;
2123	+	memset((char *)zero_page, 0, page_size);
2124	+	if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0)
2125	+	return false;
2126	+
2127	+	#if EMULATED_PPC
2128	+	// Allocate alternate stack for PowerPC interrupt routine
2129	+	sig_stack = zero_page + page_size;
2130	+	if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0)
2131	+	return false;
2132	+	#endif
2133	+
2134	+	top = base + size;
2135	+	return true;
2136	+	}
2137	+
2138	+	void SheepMem::Exit(void)
2139	+	{
2140	+	if (top) {
2141	+	// Delete SheepShaver globals
2142	+	vm_release((void *)base, size);
2143	+
2144	+	// Delete zero page
2145	+	vm_release((void *)zero_page, page_size);
2146	+
2147	+	#if EMULATED_PPC
2148	+	// Delete alternate stack for PowerPC interrupt routine
2149	+	vm_release((void *)sig_stack, SIG_STACK_SIZE);
2150	+	#endif
2151	+	}
2152	+	}
2153	+
2154	+
2155	+	/*
2156		*  Display alert
2157		*/
2158
#	Line 1812 | Line 2201 | void display_alert(int title_id, int pre
2201
2202		void ErrorAlert(const char *text)
2203		{
2204	<	#ifdef ENABLE_GTK
2204	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2205		if (PrefsFindBool("nogui") || x_display == NULL) {
2206		printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2207		return;
#	Line 1831 | Line 2220 | void ErrorAlert(const char *text)
2220
2221		void WarningAlert(const char *text)
2222		{
2223	<	#ifdef ENABLE_GTK
2223	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2224		if (PrefsFindBool("nogui") || x_display == NULL) {
2225		printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2226		return;

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