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

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.4 by gbeauche, 2003-05-13T16:59:57Z vs.
Revision 1.41 by gbeauche, 2004-06-22T17:10:07Z

#	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 108 | Line 120
120		#include "rom_patches.h"
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"
#	Line 130 | Line 144
144		#endif
145
146
147	+	// Enable emulation of unaligned lmw/stmw?
148	+	#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
149	+
150		// Enable Execute68k() safety checks?
151		#define SAFE_EXEC_68K 0
152
#	Line 139 | Line 156
156		// Interrupts in native mode?
157		#define INTERRUPTS_IN_NATIVE_MODE 1
158
159	+	// Number of alternate stacks for signal handlers?
160	+	#define SIG_STACK_COUNT 4
161	+
162
163		// Constants
164		const char ROM_FILE_NAME[] = "ROM";
165		const char ROM_FILE_NAME2[] = "Mac OS ROM";
166
167	<	const uint32 ROM_AREA_SIZE = 0x500000;          // Size of ROM area
148	<	const uint32 ROM_END = ROM_BASE + ROM_SIZE;     // End of ROM
149	<
150	<	const uint32 KERNEL_DATA_BASE = 0x68ffe000;     // Address of Kernel Data
151	<	const uint32 KERNEL_DATA2_BASE = 0x5fffe000;    // Alternate address of Kernel Data
152	<	const uint32 KERNEL_AREA_SIZE = 0x2000;         // Size of Kernel Data area
153	<
167	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
168		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
169
170
171	<	// 68k Emulator Data
172	<	struct EmulatorData {
173	<	uint32  v[0x400];
171	>	#if !EMULATED_PPC
172	>	struct sigregs {
173	>	uint32 nip;
174	>	uint32 link;
175	>	uint32 ctr;
176	>	uint32 msr;
177	>	uint32 xer;
178	>	uint32 ccr;
179	>	uint32 gpr[32];
180		};
181
182	+	#if defined(__linux__)
183	+	#include <sys/ucontext.h>
184	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
185	+
186	+	struct machine_regs : public pt_regs
187	+	{
188	+	u_long & cr()                           { return pt_regs::ccr; }
189	+	uint32 cr() const                       { return pt_regs::ccr; }
190	+	uint32 lr() const                       { return pt_regs::link; }
191	+	uint32 ctr() const                      { return pt_regs::ctr; }
192	+	uint32 xer() const                      { return pt_regs::xer; }
193	+	uint32 msr() const                      { return pt_regs::msr; }
194	+	uint32 dar() const                      { return pt_regs::dar; }
195	+	u_long & pc()                           { return pt_regs::nip; }
196	+	uint32 pc() const                       { return pt_regs::nip; }
197	+	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
198	+	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
199	+	};
200	+	#endif
201
202	<	// Kernel Data
203	<	struct KernelData {
204	<	uint32  v[0x400];
205	<	EmulatorData ed;
202	>	#if defined(__APPLE__) && defined(__MACH__)
203	>	#include <sys/signal.h>
204	>	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
205	>
206	>	#include <sys/ucontext.h>
207	>	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
208	>
209	>	struct machine_regs : public mcontext
210	>	{
211	>	uint32 & cr()                           { return ss.cr; }
212	>	uint32 cr() const                       { return ss.cr; }
213	>	uint32 lr() const                       { return ss.lr; }
214	>	uint32 ctr() const                      { return ss.ctr; }
215	>	uint32 xer() const                      { return ss.xer; }
216	>	uint32 msr() const                      { return ss.srr1; }
217	>	uint32 dar() const                      { return es.dar; }
218	>	uint32 & pc()                           { return ss.srr0; }
219	>	uint32 pc() const                       { return ss.srr0; }
220	>	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
221	>	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
222		};
223	+	#endif
224
225	+	static void build_sigregs(sigregs *srp, machine_regs *mrp)
226	+	{
227	+	srp->nip = mrp->pc();
228	+	srp->link = mrp->lr();
229	+	srp->ctr = mrp->ctr();
230	+	srp->msr = mrp->msr();
231	+	srp->xer = mrp->xer();
232	+	srp->ccr = mrp->cr();
233	+	for (int i = 0; i < 32; i++)
234	+	srp->gpr[i] = mrp->gpr(i);
235	+	}
236
237	<	#if !EMULATED_PPC
238	<	// Structure in which registers are saved in a signal handler;
172	<	// sigcontext->regs points to it
173	<	// (see arch/ppc/kernel/signal.c)
174	<	typedef struct {
175	<	uint32 u[4];
176	<	} __attribute((aligned(16))) vector128;
177	<	#include <linux/elf.h>
237	>	static struct sigaltstack sig_stacks[SIG_STACK_COUNT];  // Stacks for signal handlers
238	>	static int sig_stack_id = 0;                                                    // Stack slot currently used
239
240	<	struct sigregs {
241	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
242	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
243	<	//more (uninteresting) stuff following here
244	<	};
240	>	static inline void sig_stack_acquire(void)
241	>	{
242	>	if (++sig_stack_id == SIG_STACK_COUNT) {
243	>	printf("FATAL: signal stack overflow\n");
244	>	return;
245	>	}
246	>	sigaltstack(&sig_stacks[sig_stack_id], NULL);
247	>	}
248	>
249	>	static inline void sig_stack_release(void)
250	>	{
251	>	if (--sig_stack_id < 0) {
252	>	printf("FATAL: signal stack underflow\n");
253	>	return;
254	>	}
255	>	sigaltstack(&sig_stacks[sig_stack_id], NULL);
256	>	}
257		#endif
258
259
#	Line 192 | Line 265 | uint32 RAMBase;                        // Base address of Mac
265		uint32 RAMSize;                 // Size of Mac RAM
266		uint32 KernelDataAddr;  // Address of Kernel Data
267		uint32 BootGlobsAddr;   // Address of BootGlobs structure at top of Mac RAM
268	+	uint32 DRCacheAddr;             // Address of DR Cache
269		uint32 PVR;                             // Theoretical PVR
270		int64 CPUClockSpeed;    // Processor clock speed (Hz)
271		int64 BusClockSpeed;    // Bus clock speed (Hz)
272
273
274		// Global variables
275	<	static char *x_display_name = NULL;                     // X11 display name
275	>	char *x_display_name = NULL;                            // X11 display name
276		Display *x_display = NULL;                                      // X11 display handle
277	+	#ifdef X11_LOCK_TYPE
278	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
279	+	#endif
280
281		static int zero_fd = 0;                                         // FD of /dev/zero
282		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
283		static int kernel_area = -1;                            // SHM ID of Kernel Data area
284		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
285		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
286	<	static void *mmap_RAMBase = NULL;                       // Base address of mmap()ed RAM area
286	>	static bool dr_cache_area_mapped = false;       // Flag: Mac DR Cache mmap()ped
287	>	static bool dr_emulator_area_mapped = false;// Flag: Mac DR Emulator mmap()ped
288		static KernelData *kernel_data;                         // Pointer to Kernel Data
289		static EmulatorData *emulator_data;
290
291		static uint8 last_xpram[XPRAM_SIZE];            // Buffer for monitoring XPRAM changes
292
293		static bool nvram_thread_active = false;        // Flag: NVRAM watchdog installed
294	+	static volatile bool nvram_thread_cancel;       // Flag: Cancel NVRAM thread
295		static pthread_t nvram_thread;                          // NVRAM watchdog
296		static bool tick_thread_active = false;         // Flag: MacOS thread installed
297	+	static volatile bool tick_thread_cancel;        // Flag: Cancel 60Hz thread
298		static pthread_t tick_thread;                           // 60Hz thread
299		static pthread_t emul_thread;                           // MacOS thread
300
301		static bool ready_for_signals = false;          // Handler installed, signals can be sent
302		static int64 num_segv = 0;                                      // Number of handled SEGV signals
303
224	–	#if !EMULATED_PPC
304		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
305	+	#if EMULATED_PPC
306	+	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
307	+	#else
308		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
309		static struct sigaction sigill_action;          // Illegal instruction signal (of emulator thread)
228	–	static void *sig_stack = NULL;                          // Stack for signal handlers
229	–	static void *extra_stack = NULL;                        // Stack for SIGSEGV inside interrupt handler
310		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
311		static sigregs sigsegv_regs;                            // Register dump when crashed
312	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
313		#endif
314
315	+	uint32  SheepMem::page_size;                            // Size of a native page
316	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
317	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
318	+	uintptr SheepMem::top = 0;                                      // Top of SheepShaver data (stack like storage)
319	+
320
321		// Prototypes
322		static void Quit(void);
323		static void *emul_func(void *arg);
324		static void *nvram_func(void *arg);
325		static void *tick_func(void *arg);
326	<	#if !EMULATED_PPC
327	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
328	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
329	<	static void sigill_handler(int sig, sigcontext_struct *sc);
326	>	#if EMULATED_PPC
327	>	extern void emul_ppc(uint32 start);
328	>	extern void init_emul_ppc(void);
329	>	extern void exit_emul_ppc(void);
330	>	#else
331	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
332	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
333	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
334		#endif
335
336
337		// From asm_linux.S
338	<	#if EMULATED_PPC
249	<	extern int atomic_add(int *var, int v);
250	<	extern int atomic_and(int *var, int v);
251	<	extern int atomic_or(int *var, int v);
252	<	#else
338	>	#if !EMULATED_PPC
339		extern "C" void *get_toc(void);
340		extern "C" void *get_sp(void);
341		extern "C" void flush_icache_range(void *start, void *end);
#	Line 264 | Line 350 | extern void paranoia_check(void);
350		#endif
351
352
353	+	#if EMULATED_PPC
354	+	/*
355	+	*  Return signal stack base
356	+	*/
357	+
358	+	uintptr SignalStackBase(void)
359	+	{
360	+	return sig_stack + SIG_STACK_SIZE;
361	+	}
362	+
363	+
364	+	/*
365	+	*  Atomic operations
366	+	*/
367	+
368	+	#if HAVE_SPINLOCKS
369	+	static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED;
370	+	#else
371	+	#define spin_lock(LOCK)
372	+	#define spin_unlock(LOCK)
373	+	#endif
374	+
375	+	int atomic_add(int *var, int v)
376	+	{
377	+	spin_lock(&atomic_ops_lock);
378	+	int ret = *var;
379	+	*var += v;
380	+	spin_unlock(&atomic_ops_lock);
381	+	return ret;
382	+	}
383	+
384	+	int atomic_and(int *var, int v)
385	+	{
386	+	spin_lock(&atomic_ops_lock);
387	+	int ret = *var;
388	+	*var &= v;
389	+	spin_unlock(&atomic_ops_lock);
390	+	return ret;
391	+	}
392	+
393	+	int atomic_or(int *var, int v)
394	+	{
395	+	spin_lock(&atomic_ops_lock);
396	+	int ret = *var;
397	+	*var |= v;
398	+	spin_unlock(&atomic_ops_lock);
399	+	return ret;
400	+	}
401	+	#endif
402	+
403	+
404		/*
405		*  Main program
406		*/
#	Line 282 | Line 419 | int main(int argc, char **argv)
419		char str[256];
420		uint32 *boot_globs;
421		int16 i16;
285	–	int drive, driver;
422		int rom_fd;
423		FILE *proc_file;
424		const char *rom_path;
#	Line 292 | Line 428 | int main(int argc, char **argv)
428
429		// Initialize variables
430		RAMBase = 0;
295	–	mmap_RAMBase = NULL;
431		tzset();
432
433		// Print some info
#	Line 350 | Line 485 | int main(int argc, char **argv)
485		PVR = 0x00040000;                       // Default: 604
486		CPUClockSpeed = 100000000;      // Default: 100MHz
487		BusClockSpeed = 100000000;      // Default: 100MHz
488	<	#if !EMULATED_PPC
488	>	#if EMULATED_PPC
489	>	PVR = 0x000c0000;                       // Default: 7400 (with AltiVec)
490	>	#elif defined(__APPLE__) && defined(__MACH__)
491	>	proc_file = popen("ioreg -c IOPlatformDevice", "r");
492	>	if (proc_file) {
493	>	char line[256];
494	>	bool powerpc_node = false;
495	>	while (fgets(line, sizeof(line) - 1, proc_file)) {
496	>	// Read line
497	>	int len = strlen(line);
498	>	if (len == 0)
499	>	continue;
500	>	line[len - 1] = 0;
501	>
502	>	// Parse line
503	>	if (strstr(line, "o PowerPC,"))
504	>	powerpc_node = true;
505	>	else if (powerpc_node) {
506	>	uint32 value;
507	>	char head[256];
508	>	if (sscanf(line, "%[ |]\"cpu-version\" = <%x>", head, &value) == 2)
509	>	PVR = value;
510	>	else if (sscanf(line, "%[ |]\"clock-frequency\" = <%x>", head, &value) == 2)
511	>	CPUClockSpeed = value;
512	>	else if (sscanf(line, "%[ |]\"bus-frequency\" = <%x>", head, &value) == 2)
513	>	BusClockSpeed = value;
514	>	else if (strchr(line, '}'))
515	>	powerpc_node = false;
516	>	}
517	>	}
518	>	fclose(proc_file);
519	>	} else {
520	>	sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
521	>	WarningAlert(str);
522	>	}
523	>	#else
524		proc_file = fopen("/proc/cpuinfo", "r");
525		if (proc_file) {
526		char line[256];
#	Line 364 | Line 534 | int main(int argc, char **argv)
534		// Parse line
535		int i;
536		char value[256];
537	<	if (sscanf(line, "cpu : %s", value) == 1) {
537	>	if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
538		if (strcmp(value, "601") == 0)
539		PVR = 0x00010000;
540		else if (strcmp(value, "603") == 0)
#	Line 385 | Line 555 | int main(int argc, char **argv)
555		PVR = 0x00320000;
556		else if (strcmp(value, "860") == 0)
557		PVR = 0x00500000;
558	+	else if (strcmp(value, "7400") == 0)
559	+	PVR = 0x000c0000;
560	+	else if (strcmp(value, "7410") == 0)
561	+	PVR = 0x800c0000;
562		else
563		printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
564		}
#	Line 396 | Line 570 | int main(int argc, char **argv)
570		sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
571		WarningAlert(str);
572		}
573	+
574	+	// Get actual bus frequency
575	+	proc_file = fopen("/proc/device-tree/clock-frequency", "r");
576	+	if (proc_file) {
577	+	union { uint8 b[4]; uint32 l; } value;
578	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
579	+	BusClockSpeed = value.l;
580	+	fclose(proc_file);
581	+	}
582		#endif
583		D(bug("PVR: %08x (assumed)\n", PVR));
584
#	Line 420 | Line 603 | int main(int argc, char **argv)
603		goto quit;
604		}
605
606	+	#ifndef PAGEZERO_HACK
607		// Create Low Memory area (0x0000..0x3000)
608		if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
609		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
#	Line 427 | Line 611 | int main(int argc, char **argv)
611		goto quit;
612		}
613		lm_area_mapped = true;
614	+	#endif
615
616		// Create areas for Kernel Data
617		kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
#	Line 445 | Line 630 | int main(int argc, char **argv)
630		ErrorAlert(str);
631		goto quit;
632		}
633	<	kernel_data = (KernelData *)0x68ffe000;
633	>	kernel_data = (KernelData *)KERNEL_DATA_BASE;
634		emulator_data = &kernel_data->ed;
635	<	KernelDataAddr = (uint32)kernel_data;
635	>	KernelDataAddr = KERNEL_DATA_BASE;
636		D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
637
638	+	// Create area for DR Cache
639	+	if (vm_acquire_fixed((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
640	+	sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
641	+	ErrorAlert(str);
642	+	goto quit;
643	+	}
644	+	dr_emulator_area_mapped = true;
645	+	if (vm_acquire_fixed((void *)DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
646	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
647	+	ErrorAlert(str);
648	+	goto quit;
649	+	}
650	+	dr_cache_area_mapped = true;
651	+	#if !EMULATED_PPC
652	+	if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
653	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
654	+	ErrorAlert(str);
655	+	goto quit;
656	+	}
657	+	#endif
658	+	DRCacheAddr = DR_CACHE_BASE;
659	+	D(bug("DR Cache at %p\n", DRCacheAddr));
660	+
661	+	// Create area for SheepShaver data
662	+	if (!SheepMem::Init()) {
663	+	sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
664	+	ErrorAlert(str);
665	+	goto quit;
666	+	}
667	+
668		// Create area for Mac ROM
669		if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
670		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
#	Line 473 | Line 688 | int main(int argc, char **argv)
688		RAMSize = 8*1024*1024;
689		}
690
691	<	mmap_RAMBase = (void *)0x20000000;
477	<	if (vm_acquire_fixed(mmap_RAMBase, RAMSize) < 0) {
691	>	if (vm_acquire_fixed((char *)RAM_BASE, RAMSize) < 0) {
692		sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
693		ErrorAlert(str);
694		goto quit;
695		}
696		#if !EMULATED_PPC
697	<	if (vm_protect(mmap_RAMBase, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
697	>	if (vm_protect((char *)RAM_BASE, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
698		sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
699		ErrorAlert(str);
700		goto quit;
701		}
702		#endif
703	<	RAMBase = (uint32)mmap_RAMBase;
703	>	RAMBase = RAM_BASE;
704		ram_area_mapped = true;
705		D(bug("RAM area at %08x\n", RAMBase));
706
#	Line 527 | Line 741 | int main(int argc, char **argv)
741		// Load NVRAM
742		XPRAMInit();
743
744	+	// Load XPRAM default values if signature not found
745	+	if (XPRAM[0x130c] != 0x4e || XPRAM[0x130d] != 0x75
746	+	|| XPRAM[0x130e] != 0x4d || XPRAM[0x130f] != 0x63) {
747	+	D(bug("Loading XPRAM default values\n"));
748	+	memset(XPRAM + 0x1300, 0, 0x100);
749	+	XPRAM[0x130c] = 0x4e;   // "NuMc" signature
750	+	XPRAM[0x130d] = 0x75;
751	+	XPRAM[0x130e] = 0x4d;
752	+	XPRAM[0x130f] = 0x63;
753	+	XPRAM[0x1301] = 0x80;   // InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
754	+	XPRAM[0x1310] = 0xa8;   // Standard PRAM values
755	+	XPRAM[0x1311] = 0x00;
756	+	XPRAM[0x1312] = 0x00;
757	+	XPRAM[0x1313] = 0x22;
758	+	XPRAM[0x1314] = 0xcc;
759	+	XPRAM[0x1315] = 0x0a;
760	+	XPRAM[0x1316] = 0xcc;
761	+	XPRAM[0x1317] = 0x0a;
762	+	XPRAM[0x131c] = 0x00;
763	+	XPRAM[0x131d] = 0x02;
764	+	XPRAM[0x131e] = 0x63;
765	+	XPRAM[0x131f] = 0x00;
766	+	XPRAM[0x1308] = 0x13;
767	+	XPRAM[0x1309] = 0x88;
768	+	XPRAM[0x130a] = 0x00;
769	+	XPRAM[0x130b] = 0xcc;
770	+	XPRAM[0x1376] = 0x00;   // OSDefault = MacOS
771	+	XPRAM[0x1377] = 0x01;
772	+	}
773	+
774		// Set boot volume
775	<	drive = PrefsFindInt32("bootdrive");
775	>	i16 = PrefsFindInt32("bootdrive");
776		XPRAM[0x1378] = i16 >> 8;
777		XPRAM[0x1379] = i16 & 0xff;
778	<	driver = PrefsFindInt32("bootdriver");
778	>	i16 = PrefsFindInt32("bootdriver");
779		XPRAM[0x137a] = i16 >> 8;
780		XPRAM[0x137b] = i16 & 0xff;
781
#	Line 544 | Line 788 | int main(int argc, char **argv)
788		boot_globs[1] = htonl(RAMSize);
789		boot_globs[2] = htonl((uint32)-1);                      // End of bank table
790
791	+	// Init thunks
792	+	if (!ThunksInit())
793	+	goto quit;
794	+
795		// Init drivers
796		SonyInit();
797		DiskInit();
#	Line 553 | Line 801 | int main(int argc, char **argv)
801		// Init external file system
802		ExtFSInit();
803
804	+	// Init ADB
805	+	ADBInit();
806	+
807		// Init audio
808		AudioInit();
809
#	Line 587 | Line 838 | int main(int argc, char **argv)
838		// Initialize Kernel Data
839		memset(kernel_data, 0, sizeof(KernelData));
840		if (ROMType == ROMTYPE_NEWWORLD) {
841	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
842	<	static uint8 vector_lookup_tbl[128];
843	<	static uint8 vector_mask_tbl[64];
841	>	uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
842	>	memset((void *)of_dev_tree, 0, 4 * sizeof(uint32));
843	>	uintptr vector_lookup_tbl = SheepMem::Reserve(128);
844	>	uintptr vector_mask_tbl = SheepMem::Reserve(64);
845		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
846	<	memset(vector_lookup_tbl, 0, 128);
847	<	memset(vector_mask_tbl, 0, 64);
846	>	memset((void *)vector_lookup_tbl, 0, 128);
847	>	memset((void *)vector_mask_tbl, 0, 64);
848		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
849	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
850	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
851	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
849	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree);                        // OF device tree base
850	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
851	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
852		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
853		kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
854		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 609 | Line 861 | int main(int argc, char **argv)
861		kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
862		kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
863		kernel_data->v[0xf60 >> 2] = htonl(PVR);
864	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
865	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
866	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
864	>	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
865	>	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
866	>	kernel_data->v[0xf6c >> 2] = htonl(BusClockSpeed / 4);          // timebase-frequency
867		} else {
868		kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
869		kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
#	Line 623 | Line 875 | int main(int argc, char **argv)
875		kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
876		kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
877		kernel_data->v[0xf80 >> 2] = htonl(PVR);
878	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
879	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
880	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
878	>	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);                      // clock-frequency
879	>	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);                      // bus-frequency
880	>	kernel_data->v[0xf8c >> 2] = htonl(BusClockSpeed / 4);          // timebase-frequency
881		}
882
883		// Initialize extra low memory
884		D(bug("Initializing Low Memory...\n"));
885		memset(NULL, 0, 0x3000);
886		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
887	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
887	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr);                                 // For trap replacement routines
888		WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
889		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
890		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
891	+	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage());                             // Pointer to read-only page with all bits set to 0
892		#if !EMULATED_PPC
893	<	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                    // TOC pointer of emulator
641	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule);                // DLPI ethernet driver functions
642	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
643	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
644	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
645	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
646	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
647	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
893	>	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                            // TOC pointer of emulator
894		#endif
895	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT));       // DLPI ethernet driver functions
896	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
897	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
898	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
899	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
900	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
901	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
902		D(bug("Low Memory initialized\n"));
903
904		// Start 60Hz thread
905	+	tick_thread_cancel = false;
906		tick_thread_active = (pthread_create(&tick_thread, NULL, tick_func, NULL) == 0);
907		D(bug("Tick thread installed (%ld)\n", tick_thread));
908
909		// Start NVRAM watchdog thread
910		memcpy(last_xpram, XPRAM, XPRAM_SIZE);
911	+	nvram_thread_cancel = false;
912		nvram_thread_active = (pthread_create(&nvram_thread, NULL, nvram_func, NULL) == 0);
913		D(bug("NVRAM thread installed (%ld)\n", nvram_thread));
914
915		#if !EMULATED_PPC
916		// Create and install stacks for signal handlers
917	<	sig_stack = malloc(SIG_STACK_SIZE);
918	<	D(bug("Signal stack at %p\n", sig_stack));
919	<	if (sig_stack == NULL) {
920	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
921	<	goto quit;
922	<	}
923	<	extra_stack = malloc(SIG_STACK_SIZE);
924	<	D(bug("Extra stack at %p\n", extra_stack));
925	<	if (extra_stack == NULL) {
926	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
927	<	goto quit;
928	<	}
929	<	struct sigaltstack new_stack;
675	<	new_stack.ss_sp = sig_stack;
676	<	new_stack.ss_flags = 0;
677	<	new_stack.ss_size = SIG_STACK_SIZE;
678	<	if (sigaltstack(&new_stack, NULL) < 0) {
917	>	for (int i = 0; i < SIG_STACK_COUNT; i++) {
918	>	void *sig_stack = malloc(SIG_STACK_SIZE);
919	>	D(bug("Signal stack %d at %p\n", i, sig_stack));
920	>	if (sig_stack == NULL) {
921	>	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
922	>	goto quit;
923	>	}
924	>	sig_stacks[i].ss_sp = sig_stack;
925	>	sig_stacks[i].ss_flags = 0;
926	>	sig_stacks[i].ss_size = SIG_STACK_SIZE;
927	>	}
928	>	sig_stack_id = 0;
929	>	if (sigaltstack(&sig_stacks[0], NULL) < 0) {
930		sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
931		ErrorAlert(str);
932		goto quit;
#	Line 683 | Line 934 | int main(int argc, char **argv)
934		#endif
935
936		#if !EMULATED_PPC
937	<	// Install SIGSEGV handler
937	>	// Install SIGSEGV and SIGBUS handlers
938		sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
939		sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
940	<	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
941	<	sigsegv_action.sa_flags = SA_ONSTACK;
940	>	sigsegv_action.sa_sigaction = sigsegv_handler;
941	>	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
942	>	#ifdef HAVE_SIGNAL_SA_RESTORER
943		sigsegv_action.sa_restorer = NULL;
944	+	#endif
945		if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
946		sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
947		ErrorAlert(str);
948		goto quit;
949		}
950	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
951	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
952	+	ErrorAlert(str);
953	+	goto quit;
954	+	}
955
956		// Install SIGILL handler
957		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
958		sigaddset(&sigill_action.sa_mask, SIGUSR2);
959	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
960	<	sigill_action.sa_flags = SA_ONSTACK;
959	>	sigill_action.sa_sigaction = sigill_handler;
960	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
961	>	#ifdef HAVE_SIGNAL_SA_RESTORER
962		sigill_action.sa_restorer = NULL;
963	+	#endif
964		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
965		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
966		ErrorAlert(str);
967		goto quit;
968		}
969	+	#endif
970
971	+	#if !EMULATED_PPC
972		// Install interrupt signal handler
973		sigemptyset(&sigusr2_action.sa_mask);
974	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
975	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
974	>	sigusr2_action.sa_sigaction = sigusr2_handler;
975	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
976	>	#ifdef HAVE_SIGNAL_SA_RESTORER
977		sigusr2_action.sa_restorer = NULL;
978	+	#endif
979		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
980		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
981		ErrorAlert(str);
#	Line 736 | Line 1000 | quit:
1000
1001		static void Quit(void)
1002		{
1003	+	#if EMULATED_PPC
1004	+	// Exit PowerPC emulation
1005	+	exit_emul_ppc();
1006	+	#endif
1007	+
1008		// Stop 60Hz thread
1009		if (tick_thread_active) {
1010	+	tick_thread_cancel = true;
1011		pthread_cancel(tick_thread);
1012		pthread_join(tick_thread, NULL);
1013		}
1014
1015		// Stop NVRAM watchdog thread
1016		if (nvram_thread_active) {
1017	+	nvram_thread_cancel = true;
1018		pthread_cancel(nvram_thread);
1019		pthread_join(nvram_thread, NULL);
1020		}
1021
1022		#if !EMULATED_PPC
1023	<	// Uninstall SIGSEGV handler
1023	>	// Uninstall SIGSEGV and SIGBUS handlers
1024		sigemptyset(&sigsegv_action.sa_mask);
1025		sigsegv_action.sa_handler = SIG_DFL;
1026		sigsegv_action.sa_flags = 0;
1027		sigaction(SIGSEGV, &sigsegv_action, NULL);
1028	+	sigaction(SIGBUS, &sigsegv_action, NULL);
1029
1030		// Uninstall SIGILL handler
1031		sigemptyset(&sigill_action.sa_mask);
1032		sigill_action.sa_handler = SIG_DFL;
1033		sigill_action.sa_flags = 0;
1034		sigaction(SIGILL, &sigill_action, NULL);
1035	+
1036	+	// Delete stacks for signal handlers
1037	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
1038	+	void *sig_stack = sig_stacks[i].ss_sp;
1039	+	if (sig_stack)
1040	+	free(sig_stack);
1041	+	}
1042		#endif
1043
1044		// Save NVRAM
#	Line 780 | Line 1059 | static void Quit(void)
1059		// Exit audio
1060		AudioExit();
1061
1062	+	// Exit ADB
1063	+	ADBExit();
1064	+
1065		// Exit video
1066		VideoExit();
1067
#	Line 792 | Line 1074 | static void Quit(void)
1074		DiskExit();
1075		SonyExit();
1076
1077	+	// Delete thunks
1078	+	ThunksExit();
1079	+
1080	+	// Delete SheepShaver globals
1081	+	SheepMem::Exit();
1082	+
1083		// Delete RAM area
1084		if (ram_area_mapped)
1085	<	vm_release(mmap_RAMBase, RAMSize);
1085	>	vm_release((char *)RAM_BASE, RAMSize);
1086
1087		// Delete ROM area
1088		if (rom_area_mapped)
1089		vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1090
1091	+	// Delete DR cache areas
1092	+	if (dr_emulator_area_mapped)
1093	+	vm_release((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1094	+	if (dr_cache_area_mapped)
1095	+	vm_release((void *)DR_CACHE_BASE, DR_CACHE_SIZE);
1096	+
1097		// Delete Kernel Data area
1098		if (kernel_area >= 0) {
1099		shmdt((void *)KERNEL_DATA_BASE);
#	Line 839 | Line 1133 | static void Quit(void)
1133		*/
1134
1135		#if EMULATED_PPC
842	–	extern void emul_ppc(uint32 start);
843	–	extern void init_emul_ppc(void);
1136		void jump_to_rom(uint32 entry)
1137		{
1138		init_emul_ppc();
#	Line 909 | Line 1201 | void Execute68kTrap(uint16 trap, M68kReg
1201
1202
1203		/*
912	–	*  Execute PPC code from EMUL_OP routine (real mode switch)
913	–	*/
914	–
915	–	void ExecutePPC(void (*func)())
916	–	{
917	–	uint32 tvect[2] = {(uint32)func, 0};    // Fake TVECT
918	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
919	–	M68kRegisters r;
920	–	Execute68k((uint32)&desc, &r);
921	–	}
922	–
923	–
924	–	/*
1204		*  Quit emulator (cause return from jump_to_rom)
1205		*/
1206
#	Line 980 | Line 1259 | void Dump68kRegs(M68kRegisters *r)
1259
1260		void MakeExecutable(int dummy, void *start, uint32 length)
1261		{
1262	<	#if !EMULATED_PPC
984	<	if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE)))
1262	>	if (((uintptr)start >= ROM_BASE) && ((uintptr)start < (ROM_BASE + ROM_SIZE)))
1263		return;
1264	<	flush_icache_range(start, (void *)((uint32)start + length));
1264	>	#if EMULATED_PPC
1265	>	FlushCodeCache((uintptr)start, (uintptr)start + length);
1266	>	#else
1267	>	flush_icache_range(start, (void *)((uintptr)start + length));
1268		#endif
1269		}
1270
#	Line 994 | Line 1275 | void MakeExecutable(int dummy, void *sta
1275
1276		void PatchAfterStartup(void)
1277		{
1278	<	ExecutePPC(VideoInstallAccel);
1278	>	ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1279		InstallExtFS();
1280		}
1281
#	Line 1003 | Line 1284 | void PatchAfterStartup(void)
1284		*  NVRAM watchdog thread (saves NVRAM every minute)
1285		*/
1286
1287	<	static void *nvram_func(void *arg)
1287	>	static void nvram_watchdog(void)
1288		{
1289	<	struct timespec req = {60, 0};  // 1 minute
1289	>	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1290	>	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1291	>	SaveXPRAM();
1292	>	}
1293	>	}
1294
1295	<	for (;;) {
1296	<	pthread_testcancel();
1297	<	nanosleep(&req, NULL);
1298	<	pthread_testcancel();
1299	<	if (memcmp(last_xpram, XPRAM, XPRAM_SIZE)) {
1300	<	memcpy(last_xpram, XPRAM, XPRAM_SIZE);
1016	<	SaveXPRAM();
1017	<	}
1295	>	static void *nvram_func(void *arg)
1296	>	{
1297	>	while (!nvram_thread_cancel) {
1298	>	for (int i=0; i<60 && !nvram_thread_cancel; i++)
1299	>	Delay_usec(999999);             // Only wait 1 second so we quit promptly when nvram_thread_cancel becomes true
1300	>	nvram_watchdog();
1301		}
1302		return NULL;
1303		}
#	Line 1027 | Line 1310 | static void *nvram_func(void *arg)
1310		static void *tick_func(void *arg)
1311		{
1312		int tick_counter = 0;
1313	<	struct timespec req = {0, 16625000};
1313	>	uint64 start = GetTicks_usec();
1314	>	int64 ticks = 0;
1315	>	uint64 next = GetTicks_usec();
1316
1317	<	for (;;) {
1317	>	while (!tick_thread_cancel) {
1318
1319		// Wait
1320	<	nanosleep(&req, NULL);
1320	>	next += 16625;
1321	>	int64 delay = next - GetTicks_usec();
1322	>	if (delay > 0)
1323	>	Delay_usec(delay);
1324	>	else if (delay < -16625)
1325	>	next = GetTicks_usec();
1326	>	ticks++;
1327
1328		#if !EMULATED_PPC
1329		// Did we crash?
1330		if (emul_thread_fatal) {
1331
1332		// Yes, dump registers
1333	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1333	>	sigregs *r = &sigsegv_regs;
1334		char str[256];
1335	<	sprintf(str, "SIGSEGV\n"
1335	>	if (crash_reason == NULL)
1336	>	crash_reason = "SIGSEGV";
1337	>	sprintf(str, "%s\n"
1338		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1339		"  xer %08lx     cr %08lx  \n"
1340		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1052 | Line 1345 | static void *tick_func(void *arg)
1345		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1346		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1347		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1348	+	crash_reason,
1349		r->nip, r->link, r->ctr, r->msr,
1350		r->xer, r->ccr,
1351		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1087 | Line 1381 | static void *tick_func(void *arg)
1381		TriggerInterrupt();
1382		}
1383		}
1384	+
1385	+	uint64 end = GetTicks_usec();
1386	+	D(bug("%Ld ticks in %Ld usec = %f ticks/sec\n", ticks, end - start, ticks * 1000000.0 / (end - start)));
1387		return NULL;
1388		}
1389
#	Line 1097 | Line 1394 | static void *tick_func(void *arg)
1394
1395		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1396		{
1397	<	// nothing to do
1397	>	#ifdef HAVE_PTHREADS
1398	>	pthread_attr_init(attr);
1399	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1400	>	// Some of these only work for superuser
1401	>	if (geteuid() == 0) {
1402	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1403	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1404	>	struct sched_param fifo_param;
1405	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1406	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1407	>	priority);
1408	>	pthread_attr_setschedparam(attr, &fifo_param);
1409	>	}
1410	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1411	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1412	>	// If system scope is not available (eg. we're not running
1413	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1414	>	// scope.  It exposes pthread scheduling to the kernel,
1415	>	// without setting realtime priority.
1416	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1417	>	#endif
1418	>	}
1419	>	#endif
1420	>	#endif
1421		}
1422
1423
#	Line 1105 | Line 1425 | void Set_pthread_attr(pthread_attr_t *at
1425		*  Mutexes
1426		*/
1427
1428	+	#ifdef HAVE_PTHREADS
1429	+
1430	+	struct B2_mutex {
1431	+	B2_mutex() {
1432	+	pthread_mutexattr_t attr;
1433	+	pthread_mutexattr_init(&attr);
1434	+	// Initialize the mutex for priority inheritance --
1435	+	// required for accurate timing.
1436	+	#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
1437	+	pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
1438	+	#endif
1439	+	#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
1440	+	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
1441	+	#endif
1442	+	#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
1443	+	pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
1444	+	#endif
1445	+	pthread_mutex_init(&m, &attr);
1446	+	pthread_mutexattr_destroy(&attr);
1447	+	}
1448	+	~B2_mutex() {
1449	+	pthread_mutex_trylock(&m); // Make sure it's locked before
1450	+	pthread_mutex_unlock(&m);  // unlocking it.
1451	+	pthread_mutex_destroy(&m);
1452	+	}
1453	+	pthread_mutex_t m;
1454	+	};
1455	+
1456	+	B2_mutex *B2_create_mutex(void)
1457	+	{
1458	+	return new B2_mutex;
1459	+	}
1460	+
1461	+	void B2_lock_mutex(B2_mutex *mutex)
1462	+	{
1463	+	pthread_mutex_lock(&mutex->m);
1464	+	}
1465	+
1466	+	void B2_unlock_mutex(B2_mutex *mutex)
1467	+	{
1468	+	pthread_mutex_unlock(&mutex->m);
1469	+	}
1470	+
1471	+	void B2_delete_mutex(B2_mutex *mutex)
1472	+	{
1473	+	delete mutex;
1474	+	}
1475	+
1476	+	#else
1477	+
1478		struct B2_mutex {
1479		int dummy;
1480		};
#	Line 1127 | Line 1497 | void B2_delete_mutex(B2_mutex *mutex)
1497		delete mutex;
1498		}
1499
1500	+	#endif
1501	+
1502
1503		/*
1504		*  Trigger signal USR2 from another thread
1505		*/
1506
1507	+	#if !EMULATED_PPC
1508		void TriggerInterrupt(void)
1509		{
1137	–	#if EMULATED_PPC
1138	–	WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
1139	–	#else
1140	–	#if 0
1141	–	WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
1142	–	#else
1510		if (ready_for_signals)
1511		pthread_kill(emul_thread, SIGUSR2);
1145	–	#endif
1146	–	#endif
1512		}
1513	+	#endif
1514
1515
1516		/*
#	Line 1170 | Line 1536 | void ClearInterruptFlag(uint32 flag)
1536
1537		void DisableInterrupt(void)
1538		{
1539	+	#if EMULATED_PPC
1540	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) + 1);
1541	+	#else
1542		atomic_add((int *)XLM_IRQ_NEST, 1);
1543	+	#endif
1544		}
1545
1546
#	Line 1180 | Line 1550 | void DisableInterrupt(void)
1550
1551		void EnableInterrupt(void)
1552		{
1553	+	#if EMULATED_PPC
1554	+	WriteMacInt32(XLM_IRQ_NEST, int32(ReadMacInt32(XLM_IRQ_NEST)) - 1);
1555	+	#else
1556		atomic_add((int *)XLM_IRQ_NEST, -1);
1557	+	#endif
1558		}
1559
1560
1187	–	#if !EMULATED_PPC
1561		/*
1562		*  USR2 handler
1563		*/
1564
1565	<	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1565	>	#if !EMULATED_PPC
1566	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1567		{
1568	<	pt_regs *r = sc->regs;
1568	>	machine_regs *r = MACHINE_REGISTERS(scp);
1569
1570		// Do nothing if interrupts are disabled
1571		if (*(int32 *)XLM_IRQ_NEST > 0)
#	Line 1205 | Line 1579 | static void sigusr2_handler(int sig, sig
1579		case MODE_68K:
1580		// 68k emulator active, trigger 68k interrupt level 1
1581		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1582	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1582	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1583		break;
1584
1585		#if INTERRUPTS_IN_NATIVE_MODE
1586		case MODE_NATIVE:
1587		// 68k emulator inactive, in nanokernel?
1588	<	if (r->gpr[1] != KernelDataAddr) {
1588	>	if (r->gpr(1) != KernelDataAddr) {
1589	>
1590	>	// Set extra stack for nested interrupts
1591	>	sig_stack_acquire();
1592	>
1593		// Prepare for 68k interrupt level 1
1594		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1595		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
1596
1597		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1598	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1598	>	DisableInterrupt();
1599		if (ROMType == ROMTYPE_NEWWORLD)
1600		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1601		else
1602		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1603	+
1604	+	// Reset normal signal stack
1605	+	sig_stack_release();
1606		}
1607		break;
1608		#endif
#	Line 1232 | Line 1613 | static void sigusr2_handler(int sig, sig
1613		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1614
1615		// Set extra stack for SIGSEGV handler
1616	<	struct sigaltstack new_stack;
1236	<	new_stack.ss_sp = extra_stack;
1237	<	new_stack.ss_flags = 0;
1238	<	new_stack.ss_size = SIG_STACK_SIZE;
1239	<	sigaltstack(&new_stack, NULL);
1616	>	sig_stack_acquire();
1617		#if 1
1618		// Execute full 68k interrupt routine
1619		M68kRegisters r;
#	Line 1258 | Line 1635 | static void sigusr2_handler(int sig, sig
1635		if (InterruptFlags & INTFLAG_VIA) {
1636		ClearInterruptFlag(INTFLAG_VIA);
1637		ADBInterrupt();
1638	<	ExecutePPC(VideoVBL);
1638	>	ExecuteNative(NATIVE_VIDEO_VBL);
1639		}
1640		}
1641		#endif
1642		// Reset normal signal stack
1643	<	new_stack.ss_sp = sig_stack;
1267	<	new_stack.ss_flags = 0;
1268	<	new_stack.ss_size = SIG_STACK_SIZE;
1269	<	sigaltstack(&new_stack, NULL);
1643	>	sig_stack_release();
1644		}
1645		break;
1646		#endif
1273	–
1647		}
1648		}
1649	+	#endif
1650
1651
1652		/*
1653		*  SIGSEGV handler
1654		*/
1655
1656	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1656	>	#if !EMULATED_PPC
1657	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1658		{
1659	<	pt_regs *r = sc->regs;
1659	>	machine_regs *r = MACHINE_REGISTERS(scp);
1660	>
1661	>	// Get effective address
1662	>	uint32 addr = r->dar();
1663	>
1664	>	#if ENABLE_VOSF
1665	>	// Handle screen fault.
1666	>	extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1667	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1668	>	return;
1669	>	#endif
1670	>
1671		num_segv++;
1672
1673	<	// Fault in Mac ROM or RAM?
1674	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1673	>	// Fault in Mac ROM or RAM or DR Cache?
1674	>	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));
1675		if (mac_fault) {
1676
1291	–	// Get opcode and divide into fields
1292	–	uint32 opcode = *((uint32 *)r->nip);
1293	–	uint32 primop = opcode >> 26;
1294	–	uint32 exop = (opcode >> 1) & 0x3ff;
1295	–	uint32 ra = (opcode >> 16) & 0x1f;
1296	–	uint32 rb = (opcode >> 11) & 0x1f;
1297	–	uint32 rd = (opcode >> 21) & 0x1f;
1298	–	int32 imm = (int16)(opcode & 0xffff);
1299	–
1677		// "VM settings" during MacOS 8 installation
1678	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1679	<	r->nip += 4;
1680	<	r->gpr[8] = 0;
1678	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1679	>	r->pc() += 4;
1680	>	r->gpr(8) = 0;
1681		return;
1682
1683		// MacOS 8.5 installation
1684	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1685	<	r->nip += 4;
1686	<	r->gpr[8] = 0;
1684	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1685	>	r->pc() += 4;
1686	>	r->gpr(8) = 0;
1687		return;
1688
1689		// MacOS 8 serial drivers on startup
1690	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1691	<	r->nip += 4;
1692	<	r->gpr[8] = 0;
1690	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1691	>	r->pc() += 4;
1692	>	r->gpr(8) = 0;
1693		return;
1694
1695		// MacOS 8.1 serial drivers on startup
1696	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1697	<	r->nip += 4;
1696	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1697	>	r->pc() += 4;
1698		return;
1699	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1700	<	r->nip += 4;
1699	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1700	>	r->pc() += 4;
1701	>	return;
1702	>
1703	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1704	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 || r->gpr(16) == 0xf3012000)) {
1705	>	r->pc() += 4;
1706	>	return;
1707	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1708	>	r->pc() += 4;
1709		return;
1710		}
1711
1712	+	// Get opcode and divide into fields
1713	+	uint32 opcode = *((uint32 *)r->pc());
1714	+	uint32 primop = opcode >> 26;
1715	+	uint32 exop = (opcode >> 1) & 0x3ff;
1716	+	uint32 ra = (opcode >> 16) & 0x1f;
1717	+	uint32 rb = (opcode >> 11) & 0x1f;
1718	+	uint32 rd = (opcode >> 21) & 0x1f;
1719	+	int32 imm = (int16)(opcode & 0xffff);
1720	+
1721		// Analyze opcode
1722		enum {
1723		TYPE_UNKNOWN,
#	Line 1405 | Line 1799 | static void sigsegv_handler(int sig, sig
1799		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1800		case 45:        // sthu
1801		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1802	<	}
1803	<
1804	<	// Calculate effective address
1805	<	uint32 addr = 0;
1806	<	switch (addr_mode) {
1807	<	case MODE_X:
1808	<	case MODE_UX:
1809	<	if (ra == 0)
1810	<	addr = r->gpr[rb];
1811	<	else
1812	<	addr = r->gpr[ra] + r->gpr[rb];
1813	<	break;
1420	<	case MODE_NORM:
1421	<	case MODE_U:
1422	<	if (ra == 0)
1423	<	addr = (int32)(int16)imm;
1424	<	else
1425	<	addr = r->gpr[ra] + (int32)(int16)imm;
1802	>	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1803	>	case 46:        // lmw
1804	>	if ((addr % 4) != 0) {
1805	>	uint32 ea = addr;
1806	>	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1807	>	for (int i = rd; i <= 31; i++) {
1808	>	r->gpr(i) = ReadMacInt32(ea);
1809	>	ea += 4;
1810	>	}
1811	>	r->pc() += 4;
1812	>	goto rti;
1813	>	}
1814		break;
1815	<	default:
1815	>	case 47:        // stmw
1816	>	if ((addr % 4) != 0) {
1817	>	uint32 ea = addr;
1818	>	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1819	>	for (int i = rd; i <= 31; i++) {
1820	>	WriteMacInt32(ea, r->gpr(i));
1821	>	ea += 4;
1822	>	}
1823	>	r->pc() += 4;
1824	>	goto rti;
1825	>	}
1826		break;
1827	+	#endif
1828		}
1829	<
1830	<	// Ignore ROM writes
1831	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1832	<	//                      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));
1829	>
1830	>	// Ignore ROM writes (including to the zero page, which is read-only)
1831	>	if (transfer_type == TYPE_STORE &&
1832	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) ||
1833	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1834	>	//                      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()));
1835		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1836	<	r->gpr[ra] = addr;
1837	<	r->nip += 4;
1836	>	r->gpr(ra) = addr;
1837	>	r->pc() += 4;
1838		goto rti;
1839		}
1840
1841		// Ignore illegal memory accesses?
1842		if (PrefsFindBool("ignoresegv")) {
1843		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1844	<	r->gpr[ra] = addr;
1844	>	r->gpr(ra) = addr;
1845		if (transfer_type == TYPE_LOAD)
1846	<	r->gpr[rd] = 0;
1847	<	r->nip += 4;
1846	>	r->gpr(rd) = 0;
1847	>	r->pc() += 4;
1848		goto rti;
1849		}
1850
#	Line 1451 | Line 1852 | static void sigsegv_handler(int sig, sig
1852		if (!PrefsFindBool("nogui")) {
1853		char str[256];
1854		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1855	<	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]);
1855	>	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));
1856		else
1857	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1857	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1858		ErrorAlert(str);
1859		QuitEmulator();
1860		return;
#	Line 1461 | Line 1862 | static void sigsegv_handler(int sig, sig
1862		}
1863
1864		// For all other errors, jump into debugger (sort of...)
1865	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1866		if (!ready_for_signals) {
1867	<	printf("SIGSEGV\n");
1868	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1867	>	printf("%s\n");
1868	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1869		printf(
1870		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1871		"  xer %08lx     cr %08lx  \n"
#	Line 1475 | Line 1877 | static void sigsegv_handler(int sig, sig
1877		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1878		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1879		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1880	<	r->nip, r->link, r->ctr, r->msr,
1881	<	r->xer, r->ccr,
1882	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1883	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1884	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1885	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1886	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1887	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1888	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1889	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1880	>	crash_reason,
1881	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1882	>	r->xer(), r->cr(),
1883	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1884	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1885	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1886	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1887	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1888	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1889	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1890	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1891		exit(1);
1892		QuitEmulator();
1893		return;
1894		} else {
1895		// We crashed. Save registers, tell tick thread and loop forever
1896	<	sigsegv_regs = *(sigregs *)r;
1896	>	build_sigregs(&sigsegv_regs, r);
1897		emul_thread_fatal = true;
1898		for (;;) ;
1899		}
#	Line 1502 | Line 1905 | rti:;
1905		*  SIGILL handler
1906		*/
1907
1908	<	static void sigill_handler(int sig, sigcontext_struct *sc)
1908	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
1909		{
1910	<	pt_regs *r = sc->regs;
1910	>	machine_regs *r = MACHINE_REGISTERS(scp);
1911		char str[256];
1912
1913		// Fault in Mac ROM or RAM?
1914	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1914	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1915		if (mac_fault) {
1916
1917		// Get opcode and divide into fields
1918	<	uint32 opcode = *((uint32 *)r->nip);
1918	>	uint32 opcode = *((uint32 *)r->pc());
1919		uint32 primop = opcode >> 26;
1920		uint32 exop = (opcode >> 1) & 0x3ff;
1921		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1523 | Line 1926 | static void sigill_handler(int sig, sigc
1926		switch (primop) {
1927		case 9:         // POWER instructions
1928		case 22:
1929	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
1929	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
1930		ErrorAlert(str);
1931		QuitEmulator();
1932		return;
#	Line 1531 | Line 1934 | power_inst:            sprintf(str, GetString(STR_
1934		case 31:
1935		switch (exop) {
1936		case 83:        // mfmsr
1937	<	r->gpr[rd] = 0xf072;
1938	<	r->nip += 4;
1937	>	r->gpr(rd) = 0xf072;
1938	>	r->pc() += 4;
1939		goto rti;
1940
1941		case 210:       // mtsr
1942		case 242:       // mtsrin
1943		case 306:       // tlbie
1944	<	r->nip += 4;
1944	>	r->pc() += 4;
1945		goto rti;
1946
1947		case 339: {     // mfspr
#	Line 1554 | Line 1957 | power_inst:            sprintf(str, GetString(STR_
1957		case 957:       // PMC3
1958		case 958:       // PMC4
1959		case 959:       // SDA
1960	<	r->nip += 4;
1960	>	r->pc() += 4;
1961		goto rti;
1962		case 25:        // SDR1
1963	<	r->gpr[rd] = 0xdead001f;
1964	<	r->nip += 4;
1963	>	r->gpr(rd) = 0xdead001f;
1964	>	r->pc() += 4;
1965		goto rti;
1966		case 287:       // PVR
1967	<	r->gpr[rd] = PVR;
1968	<	r->nip += 4;
1967	>	r->gpr(rd) = PVR;
1968	>	r->pc() += 4;
1969		goto rti;
1970		}
1971		break;
#	Line 1598 | Line 2001 | power_inst:            sprintf(str, GetString(STR_
2001		case 957:       // PMC3
2002		case 958:       // PMC4
2003		case 959:       // SDA
2004	<	r->nip += 4;
2004	>	r->pc() += 4;
2005		goto rti;
2006		}
2007		break;
#	Line 1617 | Line 2020 | power_inst:            sprintf(str, GetString(STR_
2020
2021		// In GUI mode, show error alert
2022		if (!PrefsFindBool("nogui")) {
2023	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
2023	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
2024		ErrorAlert(str);
2025		QuitEmulator();
2026		return;
#	Line 1625 | Line 2028 | power_inst:            sprintf(str, GetString(STR_
2028		}
2029
2030		// For all other errors, jump into debugger (sort of...)
2031	+	crash_reason = "SIGILL";
2032		if (!ready_for_signals) {
2033	<	printf("SIGILL\n");
2034	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
2033	>	printf("%s\n");
2034	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
2035		printf(
2036		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
2037		"  xer %08lx     cr %08lx  \n"
#	Line 1639 | Line 2043 | power_inst:            sprintf(str, GetString(STR_
2043		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
2044		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
2045		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
2046	<	r->nip, r->link, r->ctr, r->msr,
2047	<	r->xer, r->ccr,
2048	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
2049	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
2050	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
2051	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
2052	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
2053	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
2054	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
2055	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
2046	>	crash_reason,
2047	>	r->pc(), r->lr(), r->ctr(), r->msr(),
2048	>	r->xer(), r->cr(),
2049	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
2050	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
2051	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
2052	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
2053	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
2054	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
2055	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
2056	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
2057		exit(1);
2058		QuitEmulator();
2059		return;
2060		} else {
2061		// We crashed. Save registers, tell tick thread and loop forever
2062	<	sigsegv_regs = *(sigregs *)r;
2062	>	build_sigregs(&sigsegv_regs, r);
2063		emul_thread_fatal = true;
2064		for (;;) ;
2065		}
#	Line 1664 | Line 2069 | rti:;
2069
2070
2071		/*
2072	+	*  Helpers to share 32-bit addressable data with MacOS
2073	+	*/
2074	+
2075	+	bool SheepMem::Init(void)
2076	+	{
2077	+	// Size of a native page
2078	+	page_size = getpagesize();
2079	+
2080	+	// Allocate SheepShaver globals
2081	+	if (vm_acquire_fixed((char *)base, size) < 0)
2082	+	return false;
2083	+
2084	+	// Allocate page with all bits set to 0
2085	+	zero_page = base + size;
2086	+	if (vm_acquire_fixed((char *)zero_page, page_size) < 0)
2087	+	return false;
2088	+	memset((char *)zero_page, 0, page_size);
2089	+	if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0)
2090	+	return false;
2091	+
2092	+	#if EMULATED_PPC
2093	+	// Allocate alternate stack for PowerPC interrupt routine
2094	+	sig_stack = zero_page + page_size;
2095	+	if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0)
2096	+	return false;
2097	+	#endif
2098	+
2099	+	top = base + size;
2100	+	return true;
2101	+	}
2102	+
2103	+	void SheepMem::Exit(void)
2104	+	{
2105	+	if (top) {
2106	+	// Delete SheepShaver globals
2107	+	vm_release((void *)base, size);
2108	+
2109	+	// Delete zero page
2110	+	vm_release((void *)zero_page, page_size);
2111	+
2112	+	#if EMULATED_PPC
2113	+	// Delete alternate stack for PowerPC interrupt routine
2114	+	vm_release((void *)sig_stack, SIG_STACK_SIZE);
2115	+	#endif
2116	+	}
2117	+	}
2118	+
2119	+
2120	+	/*
2121		*  Display alert
2122		*/
2123

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