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

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.8 by gbeauche, 2003-09-29T15:46:07Z vs.
Revision 1.67 by gbeauche, 2005-06-30T10:17:58Z

#	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) 1997-2005 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 27 | Line 27
27		*  is slightly different from the SysV ABI used by Linux:
28		*    - Stack frames are different (e.g. LR is stored in 8(r1) under
29		*      MacOS, but in 4(r1) under Linux)
30	<	*    - There is no TOC under Linux; r2 is free for the user
30	>	*    - There is a pointer to Thread Local Storage (TLS) under Linux with
31	>	*      recent enough glibc. This is r2 in 32-bit mode and r13 in
32	>	*      64-bit mode (PowerOpen/AIX ABI)
33		*    - r13 is used as a small data pointer under Linux (but appearently
34		*      it is not used this way? To be sure, we specify -msdata=none
35		*      in the Makefile)
36	<	*    - As there is no TOC, there are also no TVECTs under Linux;
37	<	*      function pointers point directly to the function code
36	>	*    - There are no TVECTs under Linux; function pointers point
37	>	*      directly to the function code
38		*  The Execute*() functions have to account for this. Additionally, we
39		*  cannot simply call MacOS functions by getting their TVECT and jumping
40		*  to it. Such calls are done via the call_macos*() functions in
#	Line 65 | Line 67
67		*  ExecutePPC (or any function that might cause a mode switch). The signal
68		*  stack is restored before exiting the SIGUSR2 handler.
69		*
70	+	*  Note that POSIX standard says you can't modify the alternate
71	+	*  signal stack while the process is executing on it. There is a
72	+	*  hackaround though: we install a trampoline SIGUSR2 handler that
73	+	*  sets up an alternate stack itself and calls the real handler.
74	+	*  Then, when we call sigaltstack() there, we no longer get an EPERM,
75	+	*  i.e. it now works.
76	+	*
77		*  TODO:
78		*    check if SIGSEGV handler works for all registers (including FP!)
79		*/
#	Line 93 | Line 102
102		#include "xpram.h"
103		#include "timer.h"
104		#include "adb.h"
96	–	#include "sony.h"
97	–	#include "disk.h"
98	–	#include "cdrom.h"
99	–	#include "scsi.h"
105		#include "video.h"
101	–	#include "audio.h"
102	–	#include "ether.h"
103	–	#include "serial.h"
104	–	#include "clip.h"
105	–	#include "extfs.h"
106		#include "sys.h"
107		#include "macos_util.h"
108		#include "rom_patches.h"
#	Line 114 | Line 114
114		#include "debug.h"
115
116
117	+	#ifdef HAVE_DIRENT_H
118	+	#include <dirent.h>
119	+	#endif
120	+
121	+	#ifdef USE_SDL
122	+	#include <SDL.h>
123	+	#endif
124	+
125	+	#ifndef USE_SDL_VIDEO
126		#include <X11/Xlib.h>
127	+	#endif
128
129		#ifdef ENABLE_GTK
130		#include <gtk/gtk.h>
#	Line 131 | Line 141
141		#endif
142
143
144	+	// Enable emulation of unaligned lmw/stmw?
145	+	#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
146	+
147		// Enable Execute68k() safety checks?
148		#define SAFE_EXEC_68K 0
149
#	Line 145 | Line 158
158		const char ROM_FILE_NAME[] = "ROM";
159		const char ROM_FILE_NAME2[] = "Mac OS ROM";
160
161	<	const uint32 RAM_BASE = 0x20000000;                     // Base address of RAM
161	>	#if REAL_ADDRESSING
162	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
163	>	#else
164	>	// FIXME: needs to be >= 0x04000000
165	>	const uintptr RAM_BASE = 0x10000000;            // Base address of RAM
166	>	#endif
167		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
168
169
170		#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	–
171		struct sigregs {
172	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
173	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
174	<	//more (uninteresting) stuff following here
172	>	uint32 nip;
173	>	uint32 link;
174	>	uint32 ctr;
175	>	uint32 msr;
176	>	uint32 xer;
177	>	uint32 ccr;
178	>	uint32 gpr[32];
179	>	};
180	>
181	>	#if defined(__linux__)
182	>	#include <sys/ucontext.h>
183	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
184	>
185	>	struct machine_regs : public pt_regs
186	>	{
187	>	u_long & cr()                           { return pt_regs::ccr; }
188	>	uint32 cr() const                       { return pt_regs::ccr; }
189	>	uint32 lr() const                       { return pt_regs::link; }
190	>	uint32 ctr() const                      { return pt_regs::ctr; }
191	>	uint32 xer() const                      { return pt_regs::xer; }
192	>	uint32 msr() const                      { return pt_regs::msr; }
193	>	uint32 dar() const                      { return pt_regs::dar; }
194	>	u_long & pc()                           { return pt_regs::nip; }
195	>	uint32 pc() const                       { return pt_regs::nip; }
196	>	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
197	>	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
198		};
199		#endif
200
201	+	#if defined(__NetBSD__)
202	+	#include <sys/ucontext.h>
203	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)&(((ucontext_t *)scp)->uc_mcontext))
204	+
205	+	struct machine_regs : public mcontext_t
206	+	{
207	+	long & cr()                                     { return __gregs[_REG_CR]; }
208	+	uint32 cr() const                       { return __gregs[_REG_CR]; }
209	+	uint32 lr() const                       { return __gregs[_REG_LR]; }
210	+	uint32 ctr() const                      { return __gregs[_REG_CTR]; }
211	+	uint32 xer() const                      { return __gregs[_REG_XER]; }
212	+	uint32 msr() const                      { return __gregs[_REG_MSR]; }
213	+	uint32 dar() const                      { return (uint32)(((siginfo_t *)(((unsigned long)this) - offsetof(ucontext_t, uc_mcontext))) - 1)->si_addr; } /* HACK */
214	+	long & pc()                                     { return __gregs[_REG_PC]; }
215	+	uint32 pc() const                       { return __gregs[_REG_PC]; }
216	+	long & gpr(int i)                       { return __gregs[_REG_R0 + i]; }
217	+	uint32 gpr(int i) const         { return __gregs[_REG_R0 + i]; }
218	+	};
219	+	#endif
220	+
221	+	#if defined(__APPLE__) && defined(__MACH__)
222	+	#include <sys/signal.h>
223	+	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
224	+
225	+	#include <sys/ucontext.h>
226	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
227	+
228	+	struct machine_regs : public mcontext
229	+	{
230	+	uint32 & cr()                           { return ss.cr; }
231	+	uint32 cr() const                       { return ss.cr; }
232	+	uint32 lr() const                       { return ss.lr; }
233	+	uint32 ctr() const                      { return ss.ctr; }
234	+	uint32 xer() const                      { return ss.xer; }
235	+	uint32 msr() const                      { return ss.srr1; }
236	+	uint32 dar() const                      { return es.dar; }
237	+	uint32 & pc()                           { return ss.srr0; }
238	+	uint32 pc() const                       { return ss.srr0; }
239	+	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
240	+	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
241	+	};
242	+	#endif
243	+
244	+	static void build_sigregs(sigregs *srp, machine_regs *mrp)
245	+	{
246	+	srp->nip = mrp->pc();
247	+	srp->link = mrp->lr();
248	+	srp->ctr = mrp->ctr();
249	+	srp->msr = mrp->msr();
250	+	srp->xer = mrp->xer();
251	+	srp->ccr = mrp->cr();
252	+	for (int i = 0; i < 32; i++)
253	+	srp->gpr[i] = mrp->gpr(i);
254	+	}
255	+	#endif
256	+
257
258		// Global variables (exported)
259		#if !EMULATED_PPC
260	<	void *TOC;                              // Small data pointer (r13)
260	>	void *TOC = NULL;               // Pointer to Thread Local Storage (r2)
261	>	void *R13 = NULL;               // Pointer to .sdata section (r13 under Linux)
262		#endif
263		uint32 RAMBase;                 // Base address of Mac RAM
264		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
265		uint32 KernelDataAddr;  // Address of Kernel Data
266		uint32 BootGlobsAddr;   // Address of BootGlobs structure at top of Mac RAM
267	+	uint32 DRCacheAddr;             // Address of DR Cache
268		uint32 PVR;                             // Theoretical PVR
269		int64 CPUClockSpeed;    // Processor clock speed (Hz)
270		int64 BusClockSpeed;    // Bus clock speed (Hz)
271	+	int64 TimebaseSpeed;    // Timebase clock speed (Hz)
272	+	uint8 *RAMBaseHost;             // Base address of Mac RAM (host address space)
273	+	uint8 *ROMBaseHost;             // Base address of Mac ROM (host address space)
274
275
276		// Global variables
277	<	static char *x_display_name = NULL;                     // X11 display name
277	>	#ifndef USE_SDL_VIDEO
278	>	char *x_display_name = NULL;                            // X11 display name
279		Display *x_display = NULL;                                      // X11 display handle
280	+	#ifdef X11_LOCK_TYPE
281	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
282	+	#endif
283	+	#endif
284
285		static int zero_fd = 0;                                         // FD of /dev/zero
190	–	static bool sheep_area_mapped = false;          // Flag: SheepShaver data area mmap()ed
286		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
287		static int kernel_area = -1;                            // SHM ID of Kernel Data area
288		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
289		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
290	+	static bool dr_cache_area_mapped = false;       // Flag: Mac DR Cache mmap()ped
291	+	static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
292		static KernelData *kernel_data;                         // Pointer to Kernel Data
293		static EmulatorData *emulator_data;
294
295		static uint8 last_xpram[XPRAM_SIZE];            // Buffer for monitoring XPRAM changes
296
297		static bool nvram_thread_active = false;        // Flag: NVRAM watchdog installed
298	+	static volatile bool nvram_thread_cancel;       // Flag: Cancel NVRAM thread
299		static pthread_t nvram_thread;                          // NVRAM watchdog
300		static bool tick_thread_active = false;         // Flag: MacOS thread installed
301	+	static volatile bool tick_thread_cancel;        // Flag: Cancel 60Hz thread
302		static pthread_t tick_thread;                           // 60Hz thread
303		static pthread_t emul_thread;                           // MacOS thread
304
#	Line 207 | Line 306 | static bool ready_for_signals = false;
306		static int64 num_segv = 0;                                      // Number of handled SEGV signals
307
308		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
309	<	#if !EMULATED_PPC
309	>	#if EMULATED_PPC
310	>	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
311	>	#else
312		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
313		static struct sigaction sigill_action;          // Illegal instruction signal (of emulator thread)
314	<	static void *sig_stack = NULL;                          // Stack for signal handlers
315	<	static void *extra_stack = NULL;                        // Stack for SIGSEGV inside interrupt handler
314	>	static struct sigaltstack sig_stack;            // Stack for signal handlers
315	>	static struct sigaltstack extra_stack;          // Stack for SIGSEGV inside interrupt handler
316		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
317		static sigregs sigsegv_regs;                            // Register dump when crashed
318	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
319		#endif
320
321	+	uint32  SheepMem::page_size;                            // Size of a native page
322	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
323	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
324	+	uintptr SheepMem::proc;                                         // Bottom address of SheepShave procedures
325	+	uintptr SheepMem::data;                                         // Top of SheepShaver data (stack like storage)
326	+
327
328		// Prototypes
329	+	static bool kernel_data_init(void);
330	+	static void kernel_data_exit(void);
331		static void Quit(void);
332		static void *emul_func(void *arg);
333		static void *nvram_func(void *arg);
334		static void *tick_func(void *arg);
335		#if EMULATED_PPC
336	<	static void sigusr2_handler(int sig);
336	>	extern void emul_ppc(uint32 start);
337	>	extern void init_emul_ppc(void);
338	>	extern void exit_emul_ppc(void);
339	>	sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
340		#else
341	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
342	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
343	<	static void sigill_handler(int sig, sigcontext_struct *sc);
341	>	extern "C" void sigusr2_handler_init(int sig, siginfo_t *sip, void *scp);
342	>	extern "C" void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
343	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
344	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
345		#endif
346
347
348		// From asm_linux.S
349	<	#if EMULATED_PPC
236	<	extern int atomic_add(int *var, int v);
237	<	extern int atomic_and(int *var, int v);
238	<	extern int atomic_or(int *var, int v);
239	<	#else
240	<	extern "C" void *get_toc(void);
349	>	#if !EMULATED_PPC
350		extern "C" void *get_sp(void);
351	<	extern "C" void flush_icache_range(void *start, void *end);
351	>	extern "C" void *get_r2(void);
352	>	extern "C" void set_r2(void *);
353	>	extern "C" void *get_r13(void);
354	>	extern "C" void set_r13(void *);
355	>	extern "C" void flush_icache_range(uint32 start, uint32 end);
356		extern "C" void jump_to_rom(uint32 entry, uint32 context);
357		extern "C" void quit_emulator(void);
358		extern "C" void execute_68k(uint32 pc, M68kRegisters *r);
#	Line 251 | Line 364 | extern void paranoia_check(void);
364		#endif
365
366
367	+	#if EMULATED_PPC
368	+	/*
369	+	*  Return signal stack base
370	+	*/
371	+
372	+	uintptr SignalStackBase(void)
373	+	{
374	+	return sig_stack + SIG_STACK_SIZE;
375	+	}
376	+
377	+
378	+	/*
379	+	*  Atomic operations
380	+	*/
381	+
382	+	#if HAVE_SPINLOCKS
383	+	static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED;
384	+	#else
385	+	#define spin_lock(LOCK)
386	+	#define spin_unlock(LOCK)
387	+	#endif
388	+
389	+	int atomic_add(int *var, int v)
390	+	{
391	+	spin_lock(&atomic_ops_lock);
392	+	int ret = *var;
393	+	*var += v;
394	+	spin_unlock(&atomic_ops_lock);
395	+	return ret;
396	+	}
397	+
398	+	int atomic_and(int *var, int v)
399	+	{
400	+	spin_lock(&atomic_ops_lock);
401	+	int ret = *var;
402	+	*var &= v;
403	+	spin_unlock(&atomic_ops_lock);
404	+	return ret;
405	+	}
406	+
407	+	int atomic_or(int *var, int v)
408	+	{
409	+	spin_lock(&atomic_ops_lock);
410	+	int ret = *var;
411	+	*var |= v;
412	+	spin_unlock(&atomic_ops_lock);
413	+	return ret;
414	+	}
415	+	#endif
416	+
417	+
418	+	/*
419	+	*  Memory management helpers
420	+	*/
421	+
422	+	static inline int vm_mac_acquire(uint32 addr, uint32 size)
423	+	{
424	+	return vm_acquire_fixed(Mac2HostAddr(addr), size);
425	+	}
426	+
427	+	static inline int vm_mac_release(uint32 addr, uint32 size)
428	+	{
429	+	return vm_release(Mac2HostAddr(addr), size);
430	+	}
431	+
432	+
433		/*
434		*  Main program
435		*/
#	Line 267 | Line 446 | static void usage(const char *prg_name)
446		int main(int argc, char **argv)
447		{
448		char str[256];
270	–	uint32 *boot_globs;
271	–	int16 i16;
272	–	int drive, driver;
449		int rom_fd;
450		FILE *proc_file;
451		const char *rom_path;
#	Line 286 | Line 462 | int main(int argc, char **argv)
462		printf(" %s\n", GetString(STR_ABOUT_TEXT2));
463
464		#if !EMULATED_PPC
465	+	#ifdef SYSTEM_CLOBBERS_R2
466		// Get TOC pointer
467	<	TOC = get_toc();
467	>	TOC = get_r2();
468	>	#endif
469	>	#ifdef SYSTEM_CLOBBERS_R13
470	>	// Get r13 register
471	>	R13 = get_r13();
472	>	#endif
473		#endif
474
475		#ifdef ENABLE_GTK
#	Line 303 | Line 485 | int main(int argc, char **argv)
485		for (int i=1; i<argc; i++) {
486		if (strcmp(argv[i], "--help") == 0) {
487		usage(argv[0]);
488	+	#ifndef USE_SDL_VIDEO
489		} else if (strcmp(argv[i], "--display") == 0) {
490		i++;
491		if (i < argc)
492		x_display_name = strdup(argv[i]);
493	+	#endif
494		} else if (argv[i][0] == '-') {
495		fprintf(stderr, "Unrecognized option '%s'\n", argv[i]);
496		usage(argv[0]);
497		}
498		}
499
500	+	#ifdef USE_SDL
501	+	// Initialize SDL system
502	+	int sdl_flags = 0;
503	+	#ifdef USE_SDL_VIDEO
504	+	sdl_flags |= SDL_INIT_VIDEO;
505	+	#endif
506	+	#ifdef USE_SDL_AUDIO
507	+	sdl_flags |= SDL_INIT_AUDIO;
508	+	#endif
509	+	assert(sdl_flags != 0);
510	+	if (SDL_Init(sdl_flags) == -1) {
511	+	char str[256];
512	+	sprintf(str, "Could not initialize SDL: %s.\n", SDL_GetError());
513	+	ErrorAlert(str);
514	+	goto quit;
515	+	}
516	+	atexit(SDL_Quit);
517	+	#endif
518	+
519	+	#ifndef USE_SDL_VIDEO
520		// Open display
521		x_display = XOpenDisplay(x_display_name);
522		if (x_display == NULL) {
#	Line 326 | Line 530 | int main(int argc, char **argv)
530		// Fork out, so we can return from fullscreen mode when things get ugly
531		XF86DGAForkApp(DefaultScreen(x_display));
532		#endif
533	+	#endif
534
535		#ifdef ENABLE_MON
536		// Initialize mon
537		mon_init();
538		#endif
539
540	+	#if !EMULATED_PPC
541	+	// Create and install stacks for signal handlers
542	+	sig_stack.ss_sp = malloc(SIG_STACK_SIZE);
543	+	D(bug("Signal stack at %p\n", sig_stack.ss_sp));
544	+	if (sig_stack.ss_sp == NULL) {
545	+	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
546	+	goto quit;
547	+	}
548	+	sig_stack.ss_flags = 0;
549	+	sig_stack.ss_size = SIG_STACK_SIZE;
550	+	if (sigaltstack(&sig_stack, NULL) < 0) {
551	+	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
552	+	ErrorAlert(str);
553	+	goto quit;
554	+	}
555	+	extra_stack.ss_sp = malloc(SIG_STACK_SIZE);
556	+	D(bug("Extra stack at %p\n", extra_stack.ss_sp));
557	+	if (extra_stack.ss_sp == NULL) {
558	+	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
559	+	goto quit;
560	+	}
561	+	extra_stack.ss_flags = 0;
562	+	extra_stack.ss_size = SIG_STACK_SIZE;
563	+	#endif
564	+
565	+	#if !EMULATED_PPC
566	+	// Install SIGSEGV and SIGBUS handlers
567	+	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
568	+	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
569	+	sigsegv_action.sa_sigaction = sigsegv_handler;
570	+	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
571	+	#ifdef HAVE_SIGNAL_SA_RESTORER
572	+	sigsegv_action.sa_restorer = NULL;
573	+	#endif
574	+	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
575	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
576	+	ErrorAlert(str);
577	+	goto quit;
578	+	}
579	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
580	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
581	+	ErrorAlert(str);
582	+	goto quit;
583	+	}
584	+	#else
585	+	// Install SIGSEGV handler for CPU emulator
586	+	if (!sigsegv_install_handler(sigsegv_handler)) {
587	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
588	+	ErrorAlert(str);
589	+	goto quit;
590	+	}
591	+	#endif
592	+
593	+	// Initialize VM system
594	+	vm_init();
595	+
596		// Get system info
597		PVR = 0x00040000;                       // Default: 604
598		CPUClockSpeed = 100000000;      // Default: 100MHz
599		BusClockSpeed = 100000000;      // Default: 100MHz
600	<	#if !EMULATED_PPC
600	>	TimebaseSpeed =  25000000;      // Default:  25MHz
601	>	#if EMULATED_PPC
602	>	PVR = 0x000c0000;                       // Default: 7400 (with AltiVec)
603	>	#elif defined(__APPLE__) && defined(__MACH__)
604	>	proc_file = popen("ioreg -c IOPlatformDevice", "r");
605	>	if (proc_file) {
606	>	char line[256];
607	>	bool powerpc_node = false;
608	>	while (fgets(line, sizeof(line) - 1, proc_file)) {
609	>	// Read line
610	>	int len = strlen(line);
611	>	if (len == 0)
612	>	continue;
613	>	line[len - 1] = 0;
614	>
615	>	// Parse line
616	>	if (strstr(line, "o PowerPC,"))
617	>	powerpc_node = true;
618	>	else if (powerpc_node) {
619	>	uint32 value;
620	>	char head[256];
621	>	if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
622	>	PVR = value;
623	>	else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
624	>	CPUClockSpeed = value;
625	>	else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
626	>	BusClockSpeed = value;
627	>	else if (sscanf(line, "%[ |]\"timebase-frequency\" = <%x>", head, &value) == 2)
628	>	TimebaseSpeed = value;
629	>	else if (strchr(line, '}'))
630	>	powerpc_node = false;
631	>	}
632	>	}
633	>	fclose(proc_file);
634	>	} else {
635	>	sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
636	>	WarningAlert(str);
637	>	}
638	>	#else
639		proc_file = fopen("/proc/cpuinfo", "r");
640		if (proc_file) {
641	+	// CPU specs from Linux kernel
642	+	// TODO: make it more generic with features (e.g. AltiVec) and
643	+	// cache information and friends for NameRegistry
644	+	static const struct {
645	+	uint32 pvr_mask;
646	+	uint32 pvr_value;
647	+	const char *cpu_name;
648	+	}
649	+	cpu_specs[] = {
650	+	{ 0xffff0000, 0x00010000, "601" },
651	+	{ 0xffff0000, 0x00030000, "603" },
652	+	{ 0xffff0000, 0x00060000, "603e" },
653	+	{ 0xffff0000, 0x00070000, "603ev" },
654	+	{ 0xffff0000, 0x00040000, "604" },
655	+	{ 0xfffff000, 0x00090000, "604e" },
656	+	{ 0xffff0000, 0x00090000, "604r" },
657	+	{ 0xffff0000, 0x000a0000, "604ev" },
658	+	{ 0xffffffff, 0x00084202, "740/750" },
659	+	{ 0xfffff000, 0x00083000, "745/755" },
660	+	{ 0xfffffff0, 0x00080100, "750CX" },
661	+	{ 0xfffffff0, 0x00082200, "750CX" },
662	+	{ 0xfffffff0, 0x00082210, "750CXe" },
663	+	{ 0xffffff00, 0x70000100, "750FX" },
664	+	{ 0xffffffff, 0x70000200, "750FX" },
665	+	{ 0xffff0000, 0x70000000, "750FX" },
666	+	{ 0xffff0000, 0x70020000, "750GX" },
667	+	{ 0xffff0000, 0x00080000, "740/750" },
668	+	{ 0xffffffff, 0x000c1101, "7400 (1.1)" },
669	+	{ 0xffff0000, 0x000c0000, "7400" },
670	+	{ 0xffff0000, 0x800c0000, "7410" },
671	+	{ 0xffffffff, 0x80000200, "7450" },
672	+	{ 0xffffffff, 0x80000201, "7450" },
673	+	{ 0xffff0000, 0x80000000, "7450" },
674	+	{ 0xffffff00, 0x80010100, "7455" },
675	+	{ 0xffffffff, 0x80010200, "7455" },
676	+	{ 0xffff0000, 0x80010000, "7455" },
677	+	{ 0xffff0000, 0x80020000, "7457" },
678	+	{ 0xffff0000, 0x80030000, "7447A" },
679	+	{ 0x7fff0000, 0x00810000, "82xx" },
680	+	{ 0x7fff0000, 0x00820000, "8280" },
681	+	{ 0xffff0000, 0x00400000, "Power3 (630)" },
682	+	{ 0xffff0000, 0x00410000, "Power3 (630+)" },
683	+	{ 0xffff0000, 0x00360000, "I-star" },
684	+	{ 0xffff0000, 0x00370000, "S-star" },
685	+	{ 0xffff0000, 0x00350000, "Power4" },
686	+	{ 0xffff0000, 0x00390000, "PPC970" },
687	+	{ 0xffff0000, 0x003a0000, "POWER5" },
688	+	{ 0, 0, 0 }
689	+	};
690	+
691		char line[256];
692		while(fgets(line, 255, proc_file)) {
693		// Read line
#	Line 350 | 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;
364	<	else if (strcmp(value, "604e") == 0)
365	<	PVR = 0x00090000;
366	<	else if (strcmp(value, "604ev5") == 0)
367	<	PVR = 0x000a0000;
368	<	else if (strcmp(value, "750") == 0)
369	<	PVR = 0x00080000;
370	<	else if (strcmp(value, "821") == 0)
371	<	PVR = 0x00320000;
372	<	else if (strcmp(value, "860") == 0)
373	<	PVR = 0x00500000;
374	<	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 382 | 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 406 | 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;
437	<	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		}
445	–	SheepStack1Base = SHEEP_BASE + 0x10000;
446	–	SheepStack2Base = SheepStack1Base + 0x10000;
447	–	SheepThunksBase = SheepStack2Base + 0x1000;
448	–	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 470 | 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 484 | 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 520 | Line 909 | int main(int argc, char **argv)
909		}
910		delete[] rom_tmp;
911
912	<	// Load NVRAM
913	<	XPRAMInit();
525	<
526	<	// Set boot volume
527	<	drive = PrefsFindInt32("bootdrive");
528	<	XPRAM[0x1378] = i16 >> 8;
529	<	XPRAM[0x1379] = i16 & 0xff;
530	<	driver = PrefsFindInt32("bootdriver");
531	<	XPRAM[0x137a] = i16 >> 8;
532	<	XPRAM[0x137b] = i16 & 0xff;
533	<
534	<	// Create BootGlobs at top of Mac memory
535	<	memset((void *)(RAMBase + RAMSize - 4096), 0, 4096);
536	<	BootGlobsAddr = RAMBase + RAMSize - 0x1c;
537	<	boot_globs = (uint32 *)BootGlobsAddr;
538	<	boot_globs[-5] = htonl(RAMBase + RAMSize);      // MemTop
539	<	boot_globs[0] = htonl(RAMBase);                         // First RAM bank
540	<	boot_globs[1] = htonl(RAMSize);
541	<	boot_globs[2] = htonl((uint32)-1);                      // End of bank table
542	<
543	<	// Init drivers
544	<	SonyInit();
545	<	DiskInit();
546	<	CDROMInit();
547	<	SCSIInit();
548	<
549	<	// Init external file system
550	<	ExtFSInit();
551	<
552	<	// Init audio
553	<	AudioInit();
554	<
555	<	// Init network
556	<	EtherInit();
557	<
558	<	// Init serial ports
559	<	SerialInit();
560	<
561	<	// Init Time Manager
562	<	TimerInit();
563	<
564	<	// Init clipboard
565	<	ClipInit();
566	<
567	<	// Init video
568	<	if (!VideoInit())
569	<	goto quit;
570	<
571	<	// Install ROM patches
572	<	if (!PatchROM()) {
573	<	ErrorAlert(GetString(STR_UNSUPPORTED_ROM_TYPE_ERR));
912	>	// Initialize everything
913	>	if (!InitAll())
914		goto quit;
915	<	}
915	>	D(bug("Initialization complete\n"));
916
917		// Clear caches (as we loaded and patched code) and write protect ROM
918		#if !EMULATED_PPC
919	<	MakeExecutable(0, (void *)ROM_BASE, ROM_AREA_SIZE);
580	<	#endif
581	<	vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
582	<
583	<	// Initialize Kernel Data
584	<	memset(kernel_data, 0, sizeof(KernelData));
585	<	if (ROMType == ROMTYPE_NEWWORLD) {
586	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
587	<	static uint8 vector_lookup_tbl[128];
588	<	static uint8 vector_mask_tbl[64];
589	<	memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
590	<	memset(vector_lookup_tbl, 0, 128);
591	<	memset(vector_mask_tbl, 0, 64);
592	<	kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
593	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
594	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
595	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
596	<	kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
597	<	kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
598	<	kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
599	<	kernel_data->v[0xc24 >> 2] = htonl(RAMSize);
600	<	kernel_data->v[0xc30 >> 2] = htonl(RAMSize);
601	<	kernel_data->v[0xc34 >> 2] = htonl(RAMSize);
602	<	kernel_data->v[0xc38 >> 2] = htonl(0x00010020);
603	<	kernel_data->v[0xc3c >> 2] = htonl(0x00200001);
604	<	kernel_data->v[0xc40 >> 2] = htonl(0x00010000);
605	<	kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
606	<	kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
607	<	kernel_data->v[0xf60 >> 2] = htonl(PVR);
608	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
609	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
610	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
611	<	} else {
612	<	kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
613	<	kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
614	<	kernel_data->v[0xc90 >> 2] = htonl(RAMSize);
615	<	kernel_data->v[0xc94 >> 2] = htonl(RAMSize);
616	<	kernel_data->v[0xc98 >> 2] = htonl(0x00010020);
617	<	kernel_data->v[0xc9c >> 2] = htonl(0x00200001);
618	<	kernel_data->v[0xca0 >> 2] = htonl(0x00010000);
619	<	kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
620	<	kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
621	<	kernel_data->v[0xf80 >> 2] = htonl(PVR);
622	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
623	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
624	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
625	<	}
626	<
627	<	// Initialize extra low memory
628	<	D(bug("Initializing Low Memory...\n"));
629	<	memset(NULL, 0, 0x3000);
630	<	WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
631	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
632	<	WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
633	<	WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
634	<	WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
635	<	#if EMULATED_PPC
636	<	WriteMacInt32(XLM_ETHER_INIT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_INIT));
637	<	WriteMacInt32(XLM_ETHER_TERM, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_TERM));
638	<	WriteMacInt32(XLM_ETHER_OPEN, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_OPEN));
639	<	WriteMacInt32(XLM_ETHER_CLOSE, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_CLOSE));
640	<	WriteMacInt32(XLM_ETHER_WPUT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_WPUT));
641	<	WriteMacInt32(XLM_ETHER_RSRV, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_RSRV));
642	<	WriteMacInt32(XLM_VIDEO_DOIO, POWERPC_NATIVE_OP_FUNC(NATIVE_VIDEO_DO_DRIVER_IO));
643	<	#else
644	<	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                    // TOC pointer of emulator
645	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule);                // DLPI ethernet driver functions
646	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
647	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
648	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
649	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
650	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
651	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
919	>	flush_icache_range(ROM_BASE, ROM_BASE + ROM_AREA_SIZE);
920		#endif
921	<	D(bug("Low Memory initialized\n"));
921	>	vm_protect(ROMBaseHost, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
922
923		// Start 60Hz thread
924	+	tick_thread_cancel = false;
925		tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
926		D(bug("Tick thread installed (%ld)\n", tick_thread));
927
928		// Start NVRAM watchdog thread
929		memcpy(last_xpram, XPRAM, XPRAM_SIZE);
930	+	nvram_thread_cancel = false;
931		nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
932		D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
933
934		#if !EMULATED_PPC
665	–	// Create and install stacks for signal handlers
666	–	sig_stack = malloc(SIG_STACK_SIZE);
667	–	D(bug("Signal stack at %p\n", sig_stack));
668	–	if (sig_stack == NULL) {
669	–	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
670	–	goto quit;
671	–	}
672	–	extra_stack = malloc(SIG_STACK_SIZE);
673	–	D(bug("Extra stack at %p\n", extra_stack));
674	–	if (extra_stack == NULL) {
675	–	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
676	–	goto quit;
677	–	}
678	–	struct sigaltstack new_stack;
679	–	new_stack.ss_sp = sig_stack;
680	–	new_stack.ss_flags = 0;
681	–	new_stack.ss_size = SIG_STACK_SIZE;
682	–	if (sigaltstack(&new_stack, NULL) < 0) {
683	–	sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
684	–	ErrorAlert(str);
685	–	goto quit;
686	–	}
687	–	#endif
688	–
689	–	#if !EMULATED_PPC
690	–	// Install SIGSEGV handler
691	–	sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
692	–	sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
693	–	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
694	–	sigsegv_action.sa_flags = SA_ONSTACK;
695	–	sigsegv_action.sa_restorer = NULL;
696	–	if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
697	–	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
698	–	ErrorAlert(str);
699	–	goto quit;
700	–	}
701	–
935		// Install SIGILL handler
936		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
937		sigaddset(&sigill_action.sa_mask, SIGUSR2);
938	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
939	<	sigill_action.sa_flags = SA_ONSTACK;
938	>	sigill_action.sa_sigaction = sigill_handler;
939	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
940	>	#ifdef HAVE_SIGNAL_SA_RESTORER
941		sigill_action.sa_restorer = NULL;
942	+	#endif
943		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
944		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
945		ErrorAlert(str);
#	Line 712 | Line 947 | int main(int argc, char **argv)
947		}
948		#endif
949
950	+	#if !EMULATED_PPC
951		// Install interrupt signal handler
952		sigemptyset(&sigusr2_action.sa_mask);
953	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
954	<	sigusr2_action.sa_flags = 0;
955	<	#if !EMULATED_PPC
720	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
721	<	#endif
953	>	sigusr2_action.sa_sigaction = sigusr2_handler_init;
954	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
955	>	#ifdef HAVE_SIGNAL_SA_RESTORER
956		sigusr2_action.sa_restorer = NULL;
957	+	#endif
958		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
959		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
960		ErrorAlert(str);
961		goto quit;
962		}
963	+	#endif
964
965		// Get my thread ID and execute MacOS thread function
966		emul_thread = pthread_self();
#	Line 743 | Line 979 | quit:
979
980		static void Quit(void)
981		{
982	+	#if EMULATED_PPC
983	+	// Exit PowerPC emulation
984	+	exit_emul_ppc();
985	+	#endif
986	+
987		// Stop 60Hz thread
988		if (tick_thread_active) {
989	+	tick_thread_cancel = true;
990		pthread_cancel(tick_thread);
991		pthread_join(tick_thread, NULL);
992		}
993
994		// Stop NVRAM watchdog thread
995		if (nvram_thread_active) {
996	+	nvram_thread_cancel = true;
997		pthread_cancel(nvram_thread);
998		pthread_join(nvram_thread, NULL);
999		}
1000
1001		#if !EMULATED_PPC
1002	<	// Uninstall SIGSEGV handler
1002	>	// Uninstall SIGSEGV and SIGBUS handlers
1003		sigemptyset(&sigsegv_action.sa_mask);
1004		sigsegv_action.sa_handler = SIG_DFL;
1005		sigsegv_action.sa_flags = 0;
1006		sigaction(SIGSEGV, &sigsegv_action, NULL);
1007	+	sigaction(SIGBUS, &sigsegv_action, NULL);
1008
1009		// Uninstall SIGILL handler
1010		sigemptyset(&sigill_action.sa_mask);
1011		sigill_action.sa_handler = SIG_DFL;
1012		sigill_action.sa_flags = 0;
1013		sigaction(SIGILL, &sigill_action, NULL);
770	–	#endif
771	–
772	–	// Save NVRAM
773	–	XPRAMExit();
774	–
775	–	// Exit clipboard
776	–	ClipExit();
777	–
778	–	// Exit Time Manager
779	–	TimerExit();
1014
1015	<	// Exit serial
1016	<	SerialExit();
1017	<
1018	<	// Exit network
1019	<	EtherExit();
1020	<
787	<	// Exit audio
788	<	AudioExit();
789	<
790	<	// Exit video
791	<	VideoExit();
1015	>	// Delete stacks for signal handlers
1016	>	if (sig_stack.ss_sp)
1017	>	free(sig_stack.ss_sp);
1018	>	if (extra_stack.ss_sp)
1019	>	free(extra_stack.ss_sp);
1020	>	#endif
1021
1022	<	// Exit external file system
1023	<	ExtFSExit();
1022	>	// Deinitialize everything
1023	>	ExitAll();
1024
1025	<	// Exit drivers
1026	<	SCSIExit();
798	<	CDROMExit();
799	<	DiskExit();
800	<	SonyExit();
1025	>	// Delete SheepShaver globals
1026	>	SheepMem::Exit();
1027
1028		// Delete RAM area
1029		if (ram_area_mapped)
1030	<	vm_release((char *)RAM_BASE, RAMSize);
1030	>	vm_mac_release(RAM_BASE, RAMSize);
1031
1032		// Delete ROM area
1033		if (rom_area_mapped)
1034	<	vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1034	>	vm_mac_release(ROM_BASE, ROM_AREA_SIZE);
1035	>
1036	>	// Delete DR cache areas
1037	>	if (dr_emulator_area_mapped)
1038	>	vm_mac_release(DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1039	>	if (dr_cache_area_mapped)
1040	>	vm_mac_release(DR_CACHE_BASE, DR_CACHE_SIZE);
1041
1042		// Delete Kernel Data area
1043	<	if (kernel_area >= 0) {
812	<	shmdt((void *)KERNEL_DATA_BASE);
813	<	shmdt((void *)KERNEL_DATA2_BASE);
814	<	shmctl(kernel_area, IPC_RMID, NULL);
815	<	}
1043	>	kernel_data_exit();
1044
1045		// Delete Low Memory area
1046		if (lm_area_mapped)
1047	<	munmap((char *)0x0000, 0x3000);
1047	>	vm_mac_release(0, 0x3000);
1048
1049		// Close /dev/zero
1050		if (zero_fd > 0)
#	Line 834 | Line 1062 | static void Quit(void)
1062		#endif
1063
1064		// Close X11 server connection
1065	+	#ifndef USE_SDL_VIDEO
1066		if (x_display)
1067		XCloseDisplay(x_display);
1068	+	#endif
1069
1070		exit(0);
1071		}
1072
1073
1074		/*
1075	+	*  Initialize Kernel Data segments
1076	+	*/
1077	+
1078	+	#if defined(__CYGWIN__)
1079	+	#define WIN32_LEAN_AND_MEAN
1080	+	#include <windows.h>
1081	+
1082	+	static HANDLE kernel_handle;                            // Shared memory handle for Kernel Data
1083	+	static DWORD allocation_granule;                        // Minimum size of allocateable are (64K)
1084	+	static DWORD kernel_area_size;                          // Size of Kernel Data area
1085	+	#endif
1086	+
1087	+	static bool kernel_data_init(void)
1088	+	{
1089	+	char str[256];
1090	+	#ifdef _WIN32
1091	+	SYSTEM_INFO si;
1092	+	GetSystemInfo(&si);
1093	+	allocation_granule = si.dwAllocationGranularity;
1094	+	kernel_area_size = (KERNEL_AREA_SIZE + allocation_granule - 1) & -allocation_granule;
1095	+
1096	+	char rcs[10];
1097	+	LPVOID kernel_addr;
1098	+	kernel_handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, kernel_area_size, NULL);
1099	+	if (kernel_handle == NULL) {
1100	+	sprintf(rcs, "%d", GetLastError());
1101	+	sprintf(str, GetString(STR_KD_SHMGET_ERR), rcs);
1102	+	ErrorAlert(str);
1103	+	return false;
1104	+	}
1105	+	kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule);
1106	+	if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
1107	+	sprintf(rcs, "%d", GetLastError());
1108	+	sprintf(str, GetString(STR_KD_SHMAT_ERR), rcs);
1109	+	ErrorAlert(str);
1110	+	return false;
1111	+	}
1112	+	kernel_addr = (LPVOID)Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule);
1113	+	if (MapViewOfFileEx(kernel_handle, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, kernel_area_size, kernel_addr) != kernel_addr) {
1114	+	sprintf(rcs, "%d", GetLastError());
1115	+	sprintf(str, GetString(STR_KD2_SHMAT_ERR), rcs);
1116	+	ErrorAlert(str);
1117	+	return false;
1118	+	}
1119	+	#else
1120	+	kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
1121	+	if (kernel_area == -1) {
1122	+	sprintf(str, GetString(STR_KD_SHMGET_ERR), strerror(errno));
1123	+	ErrorAlert(str);
1124	+	return false;
1125	+	}
1126	+	if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA_BASE), 0) < 0) {
1127	+	sprintf(str, GetString(STR_KD_SHMAT_ERR), strerror(errno));
1128	+	ErrorAlert(str);
1129	+	return false;
1130	+	}
1131	+	if (shmat(kernel_area, Mac2HostAddr(KERNEL_DATA2_BASE), 0) < 0) {
1132	+	sprintf(str, GetString(STR_KD2_SHMAT_ERR), strerror(errno));
1133	+	ErrorAlert(str);
1134	+	return false;
1135	+	}
1136	+	#endif
1137	+	return true;
1138	+	}
1139	+
1140	+
1141	+	/*
1142	+	*  Deallocate Kernel Data segments
1143	+	*/
1144	+
1145	+	static void kernel_data_exit(void)
1146	+	{
1147	+	#ifdef _WIN32
1148	+	if (kernel_handle) {
1149	+	UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA_BASE & -allocation_granule));
1150	+	UnmapViewOfFile(Mac2HostAddr(KERNEL_DATA2_BASE & -allocation_granule));
1151	+	CloseHandle(kernel_handle);
1152	+	}
1153	+	#else
1154	+	if (kernel_area >= 0) {
1155	+	shmdt(Mac2HostAddr(KERNEL_DATA_BASE));
1156	+	shmdt(Mac2HostAddr(KERNEL_DATA2_BASE));
1157	+	shmctl(kernel_area, IPC_RMID, NULL);
1158	+	}
1159	+	#endif
1160	+	}
1161	+
1162	+
1163	+	/*
1164		*  Jump into Mac ROM, start 680x0 emulator
1165		*/
1166
1167		#if EMULATED_PPC
849	–	extern void emul_ppc(uint32 start);
850	–	extern void init_emul_ppc(void);
1168		void jump_to_rom(uint32 entry)
1169		{
1170		init_emul_ppc();
#	Line 912 | Line 1229 | void Execute68kTrap(uint16 trap, M68kReg
1229		uint16 proc[2] = {trap, M68K_RTS};
1230		Execute68k((uint32)proc, r);
1231		}
915	–
916	–
917	–	/*
918	–	*  Execute PPC code from EMUL_OP routine (real mode switch)
919	–	*/
920	–
921	–	void ExecutePPC(void (*func)())
922	–	{
923	–	uint32 tvect[2] = {(uint32)func, 0};    // Fake TVECT
924	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
925	–	M68kRegisters r;
926	–	Execute68k((uint32)&desc, &r);
927	–	}
1232		#endif
1233
1234
#	Line 943 | Line 1247 | void QuitEmulator(void)
1247
1248
1249		/*
946	–	*  Pause/resume emulator
947	–	*/
948	–
949	–	void PauseEmulator(void)
950	–	{
951	–	pthread_kill(emul_thread, SIGSTOP);
952	–	}
953	–
954	–	void ResumeEmulator(void)
955	–	{
956	–	pthread_kill(emul_thread, SIGCONT);
957	–	}
958	–
959	–
960	–	/*
1250		*  Dump 68k registers
1251		*/
1252
#	Line 985 | Line 1274 | void Dump68kRegs(M68kRegisters *r)
1274		*  Make code executable
1275		*/
1276
1277	<	void MakeExecutable(int dummy, void *start, uint32 length)
1277	>	void MakeExecutable(int dummy, uint32 start, uint32 length)
1278		{
1279	<	#if !EMULATED_PPC
991	<	if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE)))
1279	>	if ((start >= ROM_BASE) && (start < (ROM_BASE + ROM_SIZE)))
1280		return;
993	–	flush_icache_range(start, (void *)((uint32)start + length));
994	–	#endif
995	–	}
996	–
997	–
998	–	/*
999	–	*  Patch things after system startup (gets called by disk driver accRun routine)
1000	–	*/
1001	–
1002	–	void PatchAfterStartup(void)
1003	–	{
1281		#if EMULATED_PPC
1282	<	ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1282	>	FlushCodeCache(start, start + length);
1283		#else
1284	<	ExecutePPC(VideoInstallAccel);
1284	>	flush_icache_range(start, start + length);
1285		#endif
1009	–	InstallExtFS();
1286		}
1287
1288
#	Line 1014 | Line 1290 | void PatchAfterStartup(void)
1290		*  NVRAM watchdog thread (saves NVRAM every minute)
1291		*/
1292
1293	<	static void *nvram_func(void *arg)
1293	>	static void nvram_watchdog(void)
1294		{
1295	<	struct timespec req = {60, 0};  // 1 minute
1295	>	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1296	>	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1297	>	SaveXPRAM();
1298	>	}
1299	>	}
1300
1301	<	for (;;) {
1302	<	pthread_testcancel();
1303	<	nanosleep(&req, NULL);
1304	<	pthread_testcancel();
1305	<	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1306	<	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1027	<	SaveXPRAM();
1028	<	}
1301	>	static void *nvram_func(void *arg)
1302	>	{
1303	>	while (!nvram_thread_cancel) {
1304	>	for (int i=0; i<60 && !nvram_thread_cancel; i++)
1305	>	Delay_usec(999999);             // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1306	>	nvram_watchdog();
1307		}
1308		return NULL;
1309		}
#	Line 1038 | Line 1316 | static void *nvram_func(void *arg)
1316		static void *tick_func(void *arg)
1317		{
1318		int tick_counter = 0;
1319	<	struct timespec req = {0, 16625000};
1319	>	uint64 start = GetTicks_usec();
1320	>	int64 ticks = 0;
1321	>	uint64 next = GetTicks_usec();
1322
1323	<	for (;;) {
1323	>	while (!tick_thread_cancel) {
1324
1325		// Wait
1326	<	nanosleep(&req, NULL);
1326	>	next += 16625;
1327	>	int64 delay = next - GetTicks_usec();
1328	>	if (delay > 0)
1329	>	Delay_usec(delay);
1330	>	else if (delay < -16625)
1331	>	next = GetTicks_usec();
1332	>	ticks++;
1333
1334		#if !EMULATED_PPC
1335		// Did we crash?
1336		if (emul_thread_fatal) {
1337
1338		// Yes, dump registers
1339	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1339	>	sigregs *r = &sigsegv_regs;
1340		char str[256];
1341	<	sprintf(str, "SIGSEGV\n"
1341	>	if (crash_reason == NULL)
1342	>	crash_reason = "SIGSEGV";
1343	>	sprintf(str, "%s\n"
1344		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1345		"  xer %08lx     cr %08lx  \n"
1346		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1063 | Line 1351 | static void *tick_func(void *arg)
1351		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1352		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1353		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1354	+	crash_reason,
1355		r->nip, r->link, r->ctr, r->msr,
1356		r->xer, r->ccr,
1357		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1098 | Line 1387 | static void *tick_func(void *arg)
1387		TriggerInterrupt();
1388		}
1389		}
1390	+
1391	+	uint64 end = GetTicks_usec();
1392	+	D(bug("%lld ticks in %lld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1393		return NULL;
1394		}
1395
#	Line 1108 | Line 1400 | static void *tick_func(void *arg)
1400
1401		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1402		{
1403	<	// nothing to do
1403	>	#ifdef HAVE_PTHREADS
1404	>	pthread_attr_init(attr);
1405	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1406	>	// Some of these only work for superuser
1407	>	if (geteuid() == 0) {
1408	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1409	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1410	>	struct sched_param fifo_param;
1411	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1412	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1413	>	priority);
1414	>	pthread_attr_setschedparam(attr, &fifo_param);
1415	>	}
1416	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1417	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1418	>	// If system scope is not available (eg. we're not running
1419	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1420	>	// scope.  It exposes pthread scheduling to the kernel,
1421	>	// without setting realtime priority.
1422	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1423	>	#endif
1424	>	}
1425	>	#endif
1426	>	#endif
1427		}
1428
1429
#	Line 1124 | Line 1439 | struct B2_mutex {
1439		pthread_mutexattr_init(&attr);
1440		// Initialize the mutex for priority inheritance --
1441		// required for accurate timing.
1442	<	#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
1442	>	#if defined(HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL) && !defined(__CYGWIN__)
1443		pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
1444		#endif
1445		#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
#	Line 1195 | Line 1510 | void B2_delete_mutex(B2_mutex *mutex)
1510		*  Trigger signal USR2 from another thread
1511		*/
1512
1513	<	#if !EMULATED_PPC || ASYNC_IRQ
1513	>	#if !EMULATED_PPC
1514		void TriggerInterrupt(void)
1515		{
1516	<	if (ready_for_signals)
1516	>	if (ready_for_signals) {
1517	>	idle_resume();
1518		pthread_kill(emul_thread, SIGUSR2);
1519	+	}
1520		}
1521		#endif
1522
#	Line 1227 | Line 1544 | void ClearInterruptFlag(uint32 flag)
1544
1545		void DisableInterrupt(void)
1546		{
1547	+	#if EMULATED_PPC
1548	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1549	+	#else
1550		atomic_add((int *)XLM_IRQ_NEST, 1);
1551	+	#endif
1552		}
1553
1554
#	Line 1237 | Line 1558 | void DisableInterrupt(void)
1558
1559		void EnableInterrupt(void)
1560		{
1561	+	#if EMULATED_PPC
1562	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1563	+	#else
1564		atomic_add((int *)XLM_IRQ_NEST, -1);
1565	+	#endif
1566		}
1567
1568
#	Line 1245 | Line 1570 | void EnableInterrupt(void)
1570		*  USR2 handler
1571		*/
1572
1573	<	#if EMULATED_PPC
1574	<	static void sigusr2_handler(int sig)
1573	>	#if !EMULATED_PPC
1574	>	void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1575		{
1576	<	#if ASYNC_IRQ
1577	<	extern void HandleInterrupt(void);
1578	<	HandleInterrupt();
1576	>	machine_regs *r = MACHINE_REGISTERS(scp);
1577	>
1578	>	#ifdef USE_SDL_VIDEO
1579	>	// We must fill in the events queue in the same thread that did call SDL_SetVideoMode()
1580	>	SDL_PumpEvents();
1581		#endif
1255	–	}
1256	–	#else
1257	–	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1258	–	{
1259	–	pt_regs *r = sc->regs;
1582
1583		// Do nothing if interrupts are disabled
1584		if (*(int32 *)XLM_IRQ_NEST > 0)
1585		return;
1586
1587	+	#ifdef SYSTEM_CLOBBERS_R2
1588	+	// Restore pointer to Thread Local Storage
1589	+	set_r2(TOC);
1590	+	#endif
1591	+	#ifdef SYSTEM_CLOBBERS_R13
1592	+	// Restore pointer to .sdata section
1593	+	set_r13(R13);
1594	+	#endif
1595	+
1596		// Disable MacOS stack sniffer
1597		WriteMacInt32(0x110, 0);
1598
#	Line 1270 | Line 1601 | static void sigusr2_handler(int sig, sig
1601		case MODE_68K:
1602		// 68k emulator active, trigger 68k interrupt level 1
1603		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1604	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1604	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1605		break;
1606
1607		#if INTERRUPTS_IN_NATIVE_MODE
1608		case MODE_NATIVE:
1609		// 68k emulator inactive, in nanokernel?
1610	<	if (r->gpr[1] != KernelDataAddr) {
1610	>	if (r->gpr(1) != KernelDataAddr) {
1611	>
1612	>	// Set extra stack for SIGSEGV handler
1613	>	sigaltstack(&extra_stack, NULL);
1614	>
1615		// Prepare for 68k interrupt level 1
1616		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1617		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1618
1619		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1620	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1620	>	DisableInterrupt();
1621		if (ROMType == ROMTYPE_NEWWORLD)
1622		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1623		else
1624		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1625	+
1626	+	// Reset normal stack
1627	+	sigaltstack(&sig_stack, NULL);
1628		}
1629		break;
1630		#endif
#	Line 1297 | Line 1635 | static void sigusr2_handler(int sig, sig
1635		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1636
1637		// Set extra stack for SIGSEGV handler
1638	<	struct sigaltstack new_stack;
1301	<	new_stack.ss_sp = extra_stack;
1302	<	new_stack.ss_flags = 0;
1303	<	new_stack.ss_size = SIG_STACK_SIZE;
1304	<	sigaltstack(&new_stack, NULL);
1638	>	sigaltstack(&extra_stack, NULL);
1639		#if 1
1640		// Execute full 68k interrupt routine
1641		M68kRegisters r;
#	Line 1323 | Line 1657 | static void sigusr2_handler(int sig, sig
1657		if (InterruptFlags & INTFLAG_VIA) {
1658		ClearInterruptFlag(INTFLAG_VIA);
1659		ADBInterrupt();
1660	<	ExecutePPC(VideoVBL);
1660	>	ExecuteNative(NATIVE_VIDEO_VBL);
1661		}
1662		}
1663		#endif
1664	<	// Reset normal signal stack
1665	<	new_stack.ss_sp = sig_stack;
1332	<	new_stack.ss_flags = 0;
1333	<	new_stack.ss_size = SIG_STACK_SIZE;
1334	<	sigaltstack(&new_stack, NULL);
1664	>	// Reset normal stack
1665	>	sigaltstack(&sig_stack, NULL);
1666		}
1667		break;
1668		#endif
#	Line 1345 | Line 1676 | static void sigusr2_handler(int sig, sig
1676		*/
1677
1678		#if !EMULATED_PPC
1679	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1679	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1680		{
1681	<	pt_regs *r = sc->regs;
1681	>	machine_regs *r = MACHINE_REGISTERS(scp);
1682
1683		// Get effective address
1684	<	uint32 addr = r->dar;
1684	>	uint32 addr = r->dar();
1685
1686	+	#ifdef SYSTEM_CLOBBERS_R2
1687	+	// Restore pointer to Thread Local Storage
1688	+	set_r2(TOC);
1689	+	#endif
1690	+	#ifdef SYSTEM_CLOBBERS_R13
1691	+	// Restore pointer to .sdata section
1692	+	set_r13(R13);
1693	+	#endif
1694	+
1695		#if ENABLE_VOSF
1696		// Handle screen fault.
1697		extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1698	<	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->nip))
1698	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1699		return;
1700		#endif
1701
1702		num_segv++;
1703
1704	<	// Fault in Mac ROM or RAM?
1705	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1704	>	// Fault in Mac ROM or RAM or DR Cache?
1705	>	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));
1706		if (mac_fault) {
1707
1708		// "VM settings" during MacOS 8 installation
1709	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1710	<	r->nip += 4;
1711	<	r->gpr[8] = 0;
1709	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1710	>	r->pc() += 4;
1711	>	r->gpr(8) = 0;
1712		return;
1713
1714		// MacOS 8.5 installation
1715	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1716	<	r->nip += 4;
1717	<	r->gpr[8] = 0;
1715	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1716	>	r->pc() += 4;
1717	>	r->gpr(8) = 0;
1718		return;
1719
1720		// MacOS 8 serial drivers on startup
1721	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1722	<	r->nip += 4;
1723	<	r->gpr[8] = 0;
1721	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1722	>	r->pc() += 4;
1723	>	r->gpr(8) = 0;
1724		return;
1725
1726		// MacOS 8.1 serial drivers on startup
1727	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1728	<	r->nip += 4;
1727	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1728	>	r->pc() += 4;
1729	>	return;
1730	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1731	>	r->pc() += 4;
1732		return;
1733	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1734	<	r->nip += 4;
1733	>
1734	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1735	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1736	>	r->pc() += 4;
1737	>	return;
1738	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1739	>	r->pc() += 4;
1740		return;
1741		}
1742
1743		// Get opcode and divide into fields
1744	<	uint32 opcode = *((uint32 *)r->nip);
1744	>	uint32 opcode = *((uint32 *)r->pc());
1745		uint32 primop = opcode >> 26;
1746		uint32 exop = (opcode >> 1) & 0x3ff;
1747		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1482 | Line 1830 | static void sigsegv_handler(int sig, sig
1830		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1831		case 45:        // sthu
1832		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1833	+	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1834	+	case 46:        // lmw
1835	+	if ((addr % 4) != 0) {
1836	+	uint32 ea = addr;
1837	+	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1838	+	for (int i = rd; i <= 31; i++) {
1839	+	r->gpr(i) = ReadMacInt32(ea);
1840	+	ea += 4;
1841	+	}
1842	+	r->pc() += 4;
1843	+	goto rti;
1844	+	}
1845	+	break;
1846	+	case 47:        // stmw
1847	+	if ((addr % 4) != 0) {
1848	+	uint32 ea = addr;
1849	+	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1850	+	for (int i = rd; i <= 31; i++) {
1851	+	WriteMacInt32(ea, r->gpr(i));
1852	+	ea += 4;
1853	+	}
1854	+	r->pc() += 4;
1855	+	goto rti;
1856	+	}
1857	+	break;
1858	+	#endif
1859		}
1860
1861	<	// Ignore ROM writes
1862	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1863	<	//                      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));
1861	>	// Ignore ROM writes (including to the zero page, which is read-only)
1862	>	if (transfer_type == TYPE_STORE &&
1863	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
1864	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1865	>	//                      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()));
1866		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1867	<	r->gpr[ra] = addr;
1868	<	r->nip += 4;
1867	>	r->gpr(ra) = addr;
1868	>	r->pc() += 4;
1869		goto rti;
1870		}
1871
1872		// Ignore illegal memory accesses?
1873		if (PrefsFindBool("ignoresegv")) {
1874		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1875	<	r->gpr[ra] = addr;
1875	>	r->gpr(ra) = addr;
1876		if (transfer_type == TYPE_LOAD)
1877	<	r->gpr[rd] = 0;
1878	<	r->nip += 4;
1877	>	r->gpr(rd) = 0;
1878	>	r->pc() += 4;
1879		goto rti;
1880		}
1881
#	Line 1507 | Line 1883 | static void sigsegv_handler(int sig, sig
1883		if (!PrefsFindBool("nogui")) {
1884		char str[256];
1885		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1886	<	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]);
1886	>	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));
1887		else
1888	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1888	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1889		ErrorAlert(str);
1890		QuitEmulator();
1891		return;
#	Line 1517 | Line 1893 | static void sigsegv_handler(int sig, sig
1893		}
1894
1895		// For all other errors, jump into debugger (sort of...)
1896	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1897		if (!ready_for_signals) {
1898	<	printf("SIGSEGV\n");
1899	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1898	>	printf("%s\n");
1899	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1900		printf(
1901		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1902		"  xer %08lx     cr %08lx  \n"
#	Line 1531 | Line 1908 | static void sigsegv_handler(int sig, sig
1908		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1909		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1910		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1911	<	r->nip, r->link, r->ctr, r->msr,
1912	<	r->xer, r->ccr,
1913	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1914	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1915	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1916	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1917	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1918	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1919	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1920	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1911	>	crash_reason,
1912	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1913	>	r->xer(), r->cr(),
1914	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1915	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1916	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1917	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1918	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1919	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1920	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1921	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1922		exit(1);
1923		QuitEmulator();
1924		return;
1925		} else {
1926		// We crashed. Save registers, tell tick thread and loop forever
1927	<	sigsegv_regs = *(sigregs *)r;
1927	>	build_sigregs(&sigsegv_regs, r);
1928		emul_thread_fatal = true;
1929		for (;;) ;
1930		}
#	Line 1558 | Line 1936 | rti:;
1936		*  SIGILL handler
1937		*/
1938
1939	<	static void sigill_handler(int sig, sigcontext_struct *sc)
1939	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
1940		{
1941	<	pt_regs *r = sc->regs;
1941	>	machine_regs *r = MACHINE_REGISTERS(scp);
1942		char str[256];
1943
1944	+	#ifdef SYSTEM_CLOBBERS_R2
1945	+	// Restore pointer to Thread Local Storage
1946	+	set_r2(TOC);
1947	+	#endif
1948	+	#ifdef SYSTEM_CLOBBERS_R13
1949	+	// Restore pointer to .sdata section
1950	+	set_r13(R13);
1951	+	#endif
1952	+
1953		// Fault in Mac ROM or RAM?
1954	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1954	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1955		if (mac_fault) {
1956
1957		// Get opcode and divide into fields
1958	<	uint32 opcode = *((uint32 *)r->nip);
1958	>	uint32 opcode = *((uint32 *)r->pc());
1959		uint32 primop = opcode >> 26;
1960		uint32 exop = (opcode >> 1) & 0x3ff;
1961		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1579 | Line 1966 | static void sigill_handler(int sig, sigc
1966		switch (primop) {
1967		case 9:         // POWER instructions
1968		case 22:
1969	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
1969	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
1970		ErrorAlert(str);
1971		QuitEmulator();
1972		return;
#	Line 1587 | Line 1974 | power_inst:            sprintf(str, GetString(STR_
1974		case 31:
1975		switch (exop) {
1976		case 83:        // mfmsr
1977	<	r->gpr[rd] = 0xf072;
1978	<	r->nip += 4;
1977	>	r->gpr(rd) = 0xf072;
1978	>	r->pc() += 4;
1979		goto rti;
1980
1981		case 210:       // mtsr
1982		case 242:       // mtsrin
1983		case 306:       // tlbie
1984	<	r->nip += 4;
1984	>	r->pc() += 4;
1985		goto rti;
1986
1987		case 339: {     // mfspr
#	Line 1610 | Line 1997 | power_inst:            sprintf(str, GetString(STR_
1997		case 957:       // PMC3
1998		case 958:       // PMC4
1999		case 959:       // SDA
2000	<	r->nip += 4;
2000	>	r->pc() += 4;
2001		goto rti;
2002		case 25:        // SDR1
2003	<	r->gpr[rd] = 0xdead001f;
2004	<	r->nip += 4;
2003	>	r->gpr(rd) = 0xdead001f;
2004	>	r->pc() += 4;
2005		goto rti;
2006		case 287:       // PVR
2007	<	r->gpr[rd] = PVR;
2008	<	r->nip += 4;
2007	>	r->gpr(rd) = PVR;
2008	>	r->pc() += 4;
2009		goto rti;
2010		}
2011		break;
#	Line 1654 | Line 2041 | power_inst:            sprintf(str, GetString(STR_
2041		case 957:       // PMC3
2042		case 958:       // PMC4
2043		case 959:       // SDA
2044	<	r->nip += 4;
2044	>	r->pc() += 4;
2045		goto rti;
2046		}
2047		break;
#	Line 1673 | Line 2060 | power_inst:            sprintf(str, GetString(STR_
2060
2061		// In GUI mode, show error alert
2062		if (!PrefsFindBool("nogui")) {
2063	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2063	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2064		ErrorAlert(str);
2065		QuitEmulator();
2066		return;
#	Line 1681 | Line 2068 | power_inst:            sprintf(str, GetString(STR_
2068		}
2069
2070		// For all other errors, jump into debugger (sort of...)
2071	+	crash_reason = "SIGILL";
2072		if (!ready_for_signals) {
2073	<	printf("SIGILL\n");
2074	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2073	>	printf("%s\n");
2074	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2075		printf(
2076		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2077		"  xer %08lx     cr %08lx  \n"
#	Line 1695 | Line 2083 | power_inst:            sprintf(str, GetString(STR_
2083		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2084		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2085		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2086	<	r->nip, r->link, r->ctr, r->msr,
2087	<	r->xer, r->ccr,
2088	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2089	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2090	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2091	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2092	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2093	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2094	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2095	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2086	>	crash_reason,
2087	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2088	>	r->xer(), r->cr(),
2089	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2090	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2091	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2092	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2093	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2094	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2095	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2096	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2097		exit(1);
2098		QuitEmulator();
2099		return;
2100		} else {
2101		// We crashed. Save registers, tell tick thread and loop forever
2102	<	sigsegv_regs = *(sigregs *)r;
2102	>	build_sigregs(&sigsegv_regs, r);
2103		emul_thread_fatal = true;
2104		for (;;) ;
2105		}
#	Line 1720 | Line 2109 | rti:;
2109
2110
2111		/*
2112	+	*  Helpers to share 32-bit addressable data with MacOS
2113	+	*/
2114	+
2115	+	bool SheepMem::Init(void)
2116	+	{
2117	+	// Size of a native page
2118	+	page_size = getpagesize();
2119	+
2120	+	// Allocate SheepShaver globals
2121	+	proc = base;
2122	+	if (vm_mac_acquire(base, size) < 0)
2123	+	return false;
2124	+
2125	+	// Allocate page with all bits set to 0, right in the middle
2126	+	// This is also used to catch undesired overlaps between proc and data areas
2127	+	zero_page = proc + (size / 2);
2128	+	Mac_memset(zero_page, 0, page_size);
2129	+	if (vm_protect(Mac2HostAddr(zero_page), page_size, VM_PAGE_READ) < 0)
2130	+	return false;
2131	+
2132	+	#if EMULATED_PPC
2133	+	// Allocate alternate stack for PowerPC interrupt routine
2134	+	sig_stack = base + size;
2135	+	if (vm_mac_acquire(sig_stack, SIG_STACK_SIZE) < 0)
2136	+	return false;
2137	+	#endif
2138	+
2139	+	data = base + size;
2140	+	return true;
2141	+	}
2142	+
2143	+	void SheepMem::Exit(void)
2144	+	{
2145	+	if (data) {
2146	+	// Delete SheepShaver globals
2147	+	vm_mac_release(base, size);
2148	+
2149	+	#if EMULATED_PPC
2150	+	// Delete alternate stack for PowerPC interrupt routine
2151	+	vm_mac_release(sig_stack, SIG_STACK_SIZE);
2152	+	#endif
2153	+	}
2154	+	}
2155	+
2156	+
2157	+	/*
2158		*  Display alert
2159		*/
2160
#	Line 1768 | Line 2203 | void display_alert(int title_id, int pre
2203
2204		void ErrorAlert(const char *text)
2205		{
2206	<	#ifdef ENABLE_GTK
2206	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2207		if (PrefsFindBool("nogui") || x_display == NULL) {
2208		printf(GetString(STR_SHELL_ERROR_PREFIX), text);
2209		return;
#	Line 1787 | Line 2222 | void ErrorAlert(const char *text)
2222
2223		void WarningAlert(const char *text)
2224		{
2225	<	#ifdef ENABLE_GTK
2225	>	#if defined(ENABLE_GTK) && !defined(USE_SDL_VIDEO)
2226		if (PrefsFindBool("nogui") || x_display == NULL) {
2227		printf(GetString(STR_SHELL_WARNING_PREFIX), text);
2228		return;

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