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

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.2 by cebix, 2002-02-21T15:12:12Z vs.
Revision 1.26 by gbeauche, 2004-01-18T22:14:31Z

#	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 107 | Line 107
107		#include "macos_util.h"
108		#include "rom_patches.h"
109		#include "user_strings.h"
110	+	#include "vm_alloc.h"
111	+	#include "sigsegv.h"
112	+	#include "thunks.h"
113
114		#define DEBUG 0
115		#include "debug.h"
#	Line 129 | Line 132
132		#endif
133
134
135	+	// Enable emulation of unaligned lmw/stmw?
136	+	#define EMULATE_UNALIGNED_LOADSTORE_MULTIPLE 1
137	+
138		// Enable Execute68k() safety checks?
139		#define SAFE_EXEC_68K 0
140
#	Line 143 | Line 149
149		const char ROM_FILE_NAME[] = "ROM";
150		const char ROM_FILE_NAME2[] = "Mac OS ROM";
151
152	<	const uint32 ROM_AREA_SIZE = 0x500000;          // Size of ROM area
147	<	const uint32 ROM_END = ROM_BASE + ROM_SIZE;     // End of ROM
148	<
149	<	const uint32 KERNEL_DATA_BASE = 0x68ffe000;     // Address of Kernel Data
150	<	const uint32 KERNEL_DATA2_BASE = 0x5fffe000;    // Alternate address of Kernel Data
151	<	const uint32 KERNEL_AREA_SIZE = 0x2000;         // Size of Kernel Data area
152	<
152	>	const uintptr RAM_BASE = 0x20000000;            // Base address of RAM
153		const uint32 SIG_STACK_SIZE = 0x10000;          // Size of signal stack
154
155
156	<	// 68k Emulator Data
157	<	struct EmulatorData {
158	<	uint32  v[0x400];
156	>	#if !EMULATED_PPC
157	>	struct sigregs {
158	>	uint32 nip;
159	>	uint32 link;
160	>	uint32 ctr;
161	>	uint32 msr;
162	>	uint32 xer;
163	>	uint32 ccr;
164	>	uint32 gpr[32];
165	>	};
166	>
167	>	#if defined(__linux__)
168	>	struct machine_regs : public pt_regs
169	>	{
170	>	u_long & cr()                           { return pt_regs::ccr; }
171	>	uint32 cr() const                       { return pt_regs::ccr; }
172	>	uint32 lr() const                       { return pt_regs::link; }
173	>	uint32 ctr() const                      { return pt_regs::ctr; }
174	>	uint32 xer() const                      { return pt_regs::xer; }
175	>	uint32 msr() const                      { return pt_regs::msr; }
176	>	uint32 dar() const                      { return pt_regs::dar; }
177	>	u_long & pc()                           { return pt_regs::nip; }
178	>	uint32 pc() const                       { return pt_regs::nip; }
179	>	u_long & gpr(int i)                     { return pt_regs::gpr[i]; }
180	>	uint32 gpr(int i) const         { return pt_regs::gpr[i]; }
181		};
182
183	+	#include <sys/ucontext.h>
184	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext.regs))
185	+	#endif
186
187	<	// Kernel Data
188	<	struct KernelData {
189	<	uint32  v[0x400];
190	<	EmulatorData ed;
187	>	#if defined(__APPLE__) && defined(__MACH__)
188	>	struct machine_regs : public mcontext
189	>	{
190	>	uint32 & cr()                           { return ss.cr; }
191	>	uint32 cr() const                       { return ss.cr; }
192	>	uint32 lr() const                       { return ss.lr; }
193	>	uint32 ctr() const                      { return ss.ctr; }
194	>	uint32 xer() const                      { return ss.xer; }
195	>	uint32 msr() const                      { return ss.srr1; }
196	>	uint32 dar() const                      { return es.dar; }
197	>	uint32 & pc()                           { return ss.srr0; }
198	>	uint32 pc() const                       { return ss.srr0; }
199	>	uint32 & gpr(int i)                     { return (&ss.r0)[i]; }
200	>	uint32 gpr(int i) const         { return (&ss.r0)[i]; }
201		};
202
203	+	#include <sys/ucontext.h>
204	+	#define MACHINE_REGISTERS(scp)  ((machine_regs *)(((ucontext_t *)scp)->uc_mcontext))
205
206	<	#if !EMULATED_PPC
207	<	// Structure in which registers are saved in a signal handler;
208	<	// sigcontext->regs points to it
172	<	// (see arch/ppc/kernel/signal.c)
173	<	typedef struct {
174	<	uint32 u[4];
175	<	} __attribute((aligned(16))) vector128;
176	<	#include <linux/elf.h>
206	>	#include <sys/signal.h>
207	>	extern "C" int sigaltstack(const struct sigaltstack *ss, struct sigaltstack *oss);
208	>	#endif
209
210	<	struct sigregs {
211	<	elf_gregset_t   gp_regs;                                // Identical to pt_regs
212	<	double                  fp_regs[ELF_NFPREG];    // f0..f31 and fpsrc
213	<	//more (uninteresting) stuff following here
214	<	};
210	>	static void build_sigregs(sigregs *srp, machine_regs *mrp)
211	>	{
212	>	srp->nip = mrp->pc();
213	>	srp->link = mrp->lr();
214	>	srp->ctr = mrp->ctr();
215	>	srp->msr = mrp->msr();
216	>	srp->xer = mrp->xer();
217	>	srp->ccr = mrp->cr();
218	>	for (int i = 0; i < 32; i++)
219	>	srp->gpr[i] = mrp->gpr(i);
220	>	}
221		#endif
222
223
#	Line 197 | Line 235 | int64 BusClockSpeed;   // Bus clock speed
235
236
237		// Global variables
238	<	static char *x_display_name = NULL;                     // X11 display name
238	>	char *x_display_name = NULL;                            // X11 display name
239		Display *x_display = NULL;                                      // X11 display handle
240	+	#ifdef X11_LOCK_TYPE
241	+	X11_LOCK_TYPE x_display_lock = X11_LOCK_INIT; // X11 display lock
242	+	#endif
243
244		static int zero_fd = 0;                                         // FD of /dev/zero
245		static bool lm_area_mapped = false;                     // Flag: Low Memory area mmap()ped
246		static int kernel_area = -1;                            // SHM ID of Kernel Data area
247		static bool rom_area_mapped = false;            // Flag: Mac ROM mmap()ped
248		static bool ram_area_mapped = false;            // Flag: Mac RAM mmap()ped
208	–	static void *mmap_RAMBase = NULL;                       // Base address of mmap()ed RAM area
249		static KernelData *kernel_data;                         // Pointer to Kernel Data
250		static EmulatorData *emulator_data;
251
#	Line 220 | Line 260 | static pthread_t emul_thread;                          // MacO
260		static bool ready_for_signals = false;          // Handler installed, signals can be sent
261		static int64 num_segv = 0;                                      // Number of handled SEGV signals
262
223	–	#if !EMULATED_PPC
263		static struct sigaction sigusr2_action;         // Interrupt signal (of emulator thread)
264	+	#if EMULATED_PPC
265	+	static uintptr sig_stack = 0;                           // Stack for PowerPC interrupt routine
266	+	#else
267		static struct sigaction sigsegv_action;         // Data access exception signal (of emulator thread)
268		static struct sigaction sigill_action;          // Illegal instruction signal (of emulator thread)
269		static void *sig_stack = NULL;                          // Stack for signal handlers
270		static void *extra_stack = NULL;                        // Stack for SIGSEGV inside interrupt handler
271		static bool emul_thread_fatal = false;          // Flag: MacOS thread crashed, tick thread shall dump debug output
272		static sigregs sigsegv_regs;                            // Register dump when crashed
273	+	static const char *crash_reason = NULL;         // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
274		#endif
275
276	+	uintptr SheepMem::zero_page = 0;                        // Address of ro page filled in with zeros
277	+	uintptr SheepMem::base = 0x60000000;            // Address of SheepShaver data
278	+	uintptr SheepMem::top = 0;                                      // Top of SheepShaver data (stack like storage)
279	+
280
281		// Prototypes
282		static void Quit(void);
283		static void *emul_func(void *arg);
284		static void *nvram_func(void *arg);
285		static void *tick_func(void *arg);
286	<	#if !EMULATED_PPC
287	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
288	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
289	<	static void sigill_handler(int sig, sigcontext_struct *sc);
286	>	#if EMULATED_PPC
287	>	static void sigusr2_handler(int sig);
288	>	extern void emul_ppc(uint32 start);
289	>	extern void init_emul_ppc(void);
290	>	extern void exit_emul_ppc(void);
291	>	#else
292	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp);
293	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp);
294	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp);
295		#endif
296
297
298		// From asm_linux.S
299	<	#if EMULATED_PPC
248	<	extern int atomic_add(int *var, int v);
249	<	extern int atomic_and(int *var, int v);
250	<	extern int atomic_or(int *var, int v);
251	<	#else
299	>	#if !EMULATED_PPC
300		extern "C" void *get_toc(void);
301		extern "C" void *get_sp(void);
302		extern "C" void flush_icache_range(void *start, void *end);
#	Line 263 | Line 311 | extern void paranoia_check(void);
311		#endif
312
313
314	<	// Decode LZSS data
315	<	static void decode_lzss(const uint8 *src, uint8 *dest, int size)
314	>	#if EMULATED_PPC
315	>	/*
316	>	*  Return signal stack base
317	>	*/
318	>
319	>	uintptr SignalStackBase(void)
320		{
321	<	char dict[0x1000];
270	<	int run_mask = 0, dict_idx = 0xfee;
271	<	for (;;) {
272	<	if (run_mask < 0x100) {
273	<	// Start new run
274	<	if (--size < 0)
275	<	break;
276	<	run_mask = *src++ | 0xff00;
277	<	}
278	<	bool bit = run_mask & 1;
279	<	run_mask >>= 1;
280	<	if (bit) {
281	<	// Verbatim copy
282	<	if (--size < 0)
283	<	break;
284	<	int c = *src++;
285	<	dict[dict_idx++] = c;
286	<	*dest++ = c;
287	<	dict_idx &= 0xfff;
288	<	} else {
289	<	// Copy from dictionary
290	<	if (--size < 0)
291	<	break;
292	<	int idx = *src++;
293	<	if (--size < 0)
294	<	break;
295	<	int cnt = *src++;
296	<	idx |= (cnt << 4) & 0xf00;
297	<	cnt = (cnt & 0x0f) + 3;
298	<	while (cnt--) {
299	<	char c = dict[idx++];
300	<	dict[dict_idx++] = c;
301	<	*dest++ = c;
302	<	idx &= 0xfff;
303	<	dict_idx &= 0xfff;
304	<	}
305	<	}
306	<	}
321	>	return sig_stack + SIG_STACK_SIZE;
322		}
323
324
325		/*
326	+	*  Atomic operations
327	+	*/
328	+
329	+	#if HAVE_SPINLOCKS
330	+	static spinlock_t atomic_ops_lock = SPIN_LOCK_UNLOCKED;
331	+	#else
332	+	#define spin_lock(LOCK)
333	+	#define spin_unlock(LOCK)
334	+	#endif
335	+
336	+	int atomic_add(int *var, int v)
337	+	{
338	+	spin_lock(&atomic_ops_lock);
339	+	int ret = *var;
340	+	*var += v;
341	+	spin_unlock(&atomic_ops_lock);
342	+	return ret;
343	+	}
344	+
345	+	int atomic_and(int *var, int v)
346	+	{
347	+	spin_lock(&atomic_ops_lock);
348	+	int ret = *var;
349	+	*var &= v;
350	+	spin_unlock(&atomic_ops_lock);
351	+	return ret;
352	+	}
353	+
354	+	int atomic_or(int *var, int v)
355	+	{
356	+	spin_lock(&atomic_ops_lock);
357	+	int ret = *var;
358	+	*var |= v;
359	+	spin_unlock(&atomic_ops_lock);
360	+	return ret;
361	+	}
362	+	#endif
363	+
364	+
365	+	/*
366		*  Main program
367		*/
368
#	Line 325 | Line 380 | int main(int argc, char **argv)
380		char str[256];
381		uint32 *boot_globs;
382		int16 i16;
328	–	int drive, driver;
383		int rom_fd;
384		FILE *proc_file;
385		const char *rom_path;
#	Line 335 | Line 389 | int main(int argc, char **argv)
389
390		// Initialize variables
391		RAMBase = 0;
338	–	mmap_RAMBase = NULL;
392		tzset();
393
394		// Print some info
#	Line 463 | Line 516 | int main(int argc, char **argv)
516		goto quit;
517		}
518
519	+	#ifndef PAGEZERO_HACK
520		// Create Low Memory area (0x0000..0x3000)
521	<	if (mmap((char *)0x0000, 0x3000, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0) == (void *)-1) {
521	>	if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
522		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
523		ErrorAlert(str);
524		goto quit;
525		}
526		lm_area_mapped = true;
527	+	#endif
528
529		// Create areas for Kernel Data
530		kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
#	Line 488 | Line 543 | int main(int argc, char **argv)
543		ErrorAlert(str);
544		goto quit;
545		}
546	<	kernel_data = (KernelData *)0x68ffe000;
546	>	kernel_data = (KernelData *)KERNEL_DATA_BASE;
547		emulator_data = &kernel_data->ed;
548	<	KernelDataAddr = (uint32)kernel_data;
548	>	KernelDataAddr = KERNEL_DATA_BASE;
549		D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
550
551	+	// Create area for SheepShaver data
552	+	if (!SheepMem::Init()) {
553	+	sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
554	+	ErrorAlert(str);
555	+	goto quit;
556	+	}
557	+
558		// Create area for Mac ROM
559	<	if (mmap((char *)ROM_BASE, ROM_AREA_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0) == (void *)-1) {
559	>	if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
560		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
561		ErrorAlert(str);
562		goto quit;
563		}
564	+	#if !EMULATED_PPC || defined(__powerpc__)
565	+	if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
566	+	sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
567	+	ErrorAlert(str);
568	+	goto quit;
569	+	}
570	+	#endif
571		rom_area_mapped = true;
572		D(bug("ROM area at %08x\n", ROM_BASE));
573
#	Line 509 | Line 578 | int main(int argc, char **argv)
578		RAMSize = 8*1024*1024;
579		}
580
581	<	mmap_RAMBase = mmap((void *)0x20000000, RAMSize, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, zero_fd, 0);
582	<	if (mmap_RAMBase == (void *)-1) {
581	>	if (vm_acquire_fixed((char *)RAM_BASE, RAMSize) < 0) {
582	>	sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
583	>	ErrorAlert(str);
584	>	goto quit;
585	>	}
586	>	#if !EMULATED_PPC
587	>	if (vm_protect((char *)RAM_BASE, RAMSize, VM_PAGE_READ | VM_PAGE_WRITE | VM_PAGE_EXECUTE) < 0) {
588		sprintf(str, GetString(STR_RAM_MMAP_ERR), strerror(errno));
589		ErrorAlert(str);
590		goto quit;
591		}
592	<	RAMBase = (uint32)mmap_RAMBase;
592	>	#endif
593	>	RAMBase = RAM_BASE;
594		ram_area_mapped = true;
595		D(bug("RAM area at %08x\n", RAMBase));
596
#	Line 540 | Line 615 | int main(int argc, char **argv)
615		rom_tmp = new uint8[ROM_SIZE];
616		actual = read(rom_fd, (void *)rom_tmp, ROM_SIZE);
617		close(rom_fd);
618	<	if (actual == ROM_SIZE) {
619	<	// Plain ROM image
620	<	memcpy((void *)ROM_BASE, rom_tmp, ROM_SIZE);
621	<	delete[] rom_tmp;
547	<	} else {
548	<	if (strncmp((char *)rom_tmp, "<CHRP-BOOT>", 11) == 0) {
549	<	// CHRP compressed ROM image
550	<	D(bug("CHRP ROM image\n"));
551	<	uint32 lzss_offset, lzss_size;
552	<
553	<	char *s = strstr((char *)rom_tmp, "constant lzss-offset");
554	<	if (s == NULL) {
555	<	ErrorAlert(GetString(STR_ROM_SIZE_ERR));
556	<	goto quit;
557	<	}
558	<	s -= 7;
559	<	if (sscanf(s, "%06x", &lzss_offset) != 1) {
560	<	ErrorAlert(GetString(STR_ROM_SIZE_ERR));
561	<	goto quit;
562	<	}
563	<	s = strstr((char *)rom_tmp, "constant lzss-size");
564	<	if (s == NULL) {
565	<	ErrorAlert(GetString(STR_ROM_SIZE_ERR));
566	<	goto quit;
567	<	}
568	<	s -= 7;
569	<	if (sscanf(s, "%06x", &lzss_size) != 1) {
570	<	ErrorAlert(GetString(STR_ROM_SIZE_ERR));
571	<	goto quit;
572	<	}
573	<	D(bug("Offset of compressed data: %08x\n", lzss_offset));
574	<	D(bug("Size of compressed data: %08x\n", lzss_size));
575	<
576	<	D(bug("Uncompressing ROM...\n"));
577	<	decode_lzss(rom_tmp + lzss_offset, (uint8 *)ROM_BASE, lzss_size);
578	<	delete[] rom_tmp;
579	<	} else if (rom_size != 4*1024*1024) {
618	>
619	>	// Decode Mac ROM
620	>	if (!DecodeROM(rom_tmp, actual)) {
621	>	if (rom_size != 4*1024*1024) {
622		ErrorAlert(GetString(STR_ROM_SIZE_ERR));
623		goto quit;
624		} else {
#	Line 584 | Line 626 | int main(int argc, char **argv)
626		goto quit;
627		}
628		}
629	+	delete[] rom_tmp;
630
631		// Load NVRAM
632		XPRAMInit();
633
634		// Set boot volume
635	<	drive = PrefsFindInt32("bootdrive");
635	>	i16 = PrefsFindInt32("bootdrive");
636		XPRAM[0x1378] = i16 >> 8;
637		XPRAM[0x1379] = i16 & 0xff;
638	<	driver = PrefsFindInt32("bootdriver");
638	>	i16 = PrefsFindInt32("bootdriver");
639		XPRAM[0x137a] = i16 >> 8;
640		XPRAM[0x137b] = i16 & 0xff;
641
#	Line 605 | Line 648 | int main(int argc, char **argv)
648		boot_globs[1] = htonl(RAMSize);
649		boot_globs[2] = htonl((uint32)-1);                      // End of bank table
650
651	+	// Init thunks
652	+	if (!ThunksInit())
653	+	goto quit;
654	+
655		// Init drivers
656		SonyInit();
657		DiskInit();
#	Line 614 | Line 661 | int main(int argc, char **argv)
661		// Init external file system
662		ExtFSInit();
663
664	+	// Init ADB
665	+	ADBInit();
666	+
667		// Init audio
668		AudioInit();
669
#	Line 643 | Line 693 | int main(int argc, char **argv)
693		#if !EMULATED_PPC
694		MakeExecutable(0, (void *)ROM_BASE, ROM_AREA_SIZE);
695		#endif
696	<	mprotect((char *)ROM_BASE, ROM_AREA_SIZE, PROT_EXEC | PROT_READ);
696	>	vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ | VM_PAGE_EXECUTE);
697
698		// Initialize Kernel Data
699		memset(kernel_data, 0, sizeof(KernelData));
700		if (ROMType == ROMTYPE_NEWWORLD) {
701	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
702	<	static uint8 vector_lookup_tbl[128];
703	<	static uint8 vector_mask_tbl[64];
701	>	uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
702	>	memset((void *)of_dev_tree, 0, 4 * sizeof(uint32));
703	>	uintptr vector_lookup_tbl = SheepMem::Reserve(128);
704	>	uintptr vector_mask_tbl = SheepMem::Reserve(64);
705		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
706	<	memset(vector_lookup_tbl, 0, 128);
707	<	memset(vector_mask_tbl, 0, 64);
706	>	memset((void *)vector_lookup_tbl, 0, 128);
707	>	memset((void *)vector_mask_tbl, 0, 64);
708		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
709	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree);        // OF device tree base
710	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
711	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
709	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree);                        // OF device tree base
710	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
711	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
712		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE);                           // OpenPIC base
713		kernel_data->v[0xbb0 >> 2] = htonl(0);                                          // ADB base
714		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 693 | Line 744 | int main(int argc, char **argv)
744		D(bug("Initializing Low Memory...\n"));
745		memset(NULL, 0, 0x3000);
746		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h'));                  // Signature to detect SheepShaver
747	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data);                    // For trap replacement routines
747	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr);                                 // For trap replacement routines
748		WriteMacInt32(XLM_PVR, PVR);                                                                    // Theoretical PVR
749		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed);                                    // For DriverServicesLib patch
750		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN);                // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
751	+	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage());                             // Pointer to read-only page with all bits set to 0
752		#if !EMULATED_PPC
753	<	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                    // TOC pointer of emulator
702	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule);                // DLPI ethernet driver functions
703	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
704	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
705	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
706	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
707	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
708	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
753	>	WriteMacInt32(XLM_TOC, (uint32)TOC);                                                            // TOC pointer of emulator
754		#endif
755	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT));       // DLPI ethernet driver functions
756	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
757	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
758	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
759	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
760	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
761	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
762		D(bug("Low Memory initialized\n"));
763
764		// Start 60Hz thread
#	Line 744 | Line 796 | int main(int argc, char **argv)
796		#endif
797
798		#if !EMULATED_PPC
799	<	// Install SIGSEGV handler
799	>	// Install SIGSEGV and SIGBUS handlers
800		sigemptyset(&sigsegv_action.sa_mask);   // Block interrupts during SEGV handling
801		sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
802	<	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
803	<	sigsegv_action.sa_flags = SA_ONSTACK;
802	>	sigsegv_action.sa_sigaction = sigsegv_handler;
803	>	sigsegv_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
804	>	#ifdef HAVE_SIGNAL_SA_RESTORER
805		sigsegv_action.sa_restorer = NULL;
806	+	#endif
807		if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
808		sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
809		ErrorAlert(str);
810		goto quit;
811		}
812	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
813	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
814	+	ErrorAlert(str);
815	+	goto quit;
816	+	}
817
818		// Install SIGILL handler
819		sigemptyset(&sigill_action.sa_mask);    // Block interrupts during ILL handling
820		sigaddset(&sigill_action.sa_mask, SIGUSR2);
821	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
822	<	sigill_action.sa_flags = SA_ONSTACK;
821	>	sigill_action.sa_sigaction = sigill_handler;
822	>	sigill_action.sa_flags = SA_ONSTACK | SA_SIGINFO;
823	>	#ifdef HAVE_SIGNAL_SA_RESTORER
824		sigill_action.sa_restorer = NULL;
825	+	#endif
826		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
827		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
828		ErrorAlert(str);
829		goto quit;
830		}
831	+	#endif
832
833	+	#if !EMULATED_PPC
834		// Install interrupt signal handler
835		sigemptyset(&sigusr2_action.sa_mask);
836	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
837	<	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART;
836	>	sigusr2_action.sa_sigaction = sigusr2_handler;
837	>	sigusr2_action.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
838	>	#ifdef HAVE_SIGNAL_SA_RESTORER
839		sigusr2_action.sa_restorer = NULL;
840	+	#endif
841		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
842		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
843		ErrorAlert(str);
#	Line 797 | Line 862 | quit:
862
863		static void Quit(void)
864		{
865	+	#if EMULATED_PPC
866	+	// Exit PowerPC emulation
867	+	exit_emul_ppc();
868	+	#endif
869	+
870		// Stop 60Hz thread
871		if (tick_thread_active) {
872		pthread_cancel(tick_thread);
#	Line 810 | Line 880 | static void Quit(void)
880		}
881
882		#if !EMULATED_PPC
883	<	// Uninstall SIGSEGV handler
883	>	// Uninstall SIGSEGV and SIGBUS handlers
884		sigemptyset(&sigsegv_action.sa_mask);
885		sigsegv_action.sa_handler = SIG_DFL;
886		sigsegv_action.sa_flags = 0;
887		sigaction(SIGSEGV, &sigsegv_action, NULL);
888	+	sigaction(SIGBUS, &sigsegv_action, NULL);
889
890		// Uninstall SIGILL handler
891		sigemptyset(&sigill_action.sa_mask);
#	Line 841 | Line 912 | static void Quit(void)
912		// Exit audio
913		AudioExit();
914
915	+	// Exit ADB
916	+	ADBExit();
917	+
918		// Exit video
919		VideoExit();
920
#	Line 853 | Line 927 | static void Quit(void)
927		DiskExit();
928		SonyExit();
929
930	+	// Delete thunks
931	+	ThunksExit();
932	+
933	+	// Delete SheepShaver globals
934	+	SheepMem::Exit();
935	+
936		// Delete RAM area
937		if (ram_area_mapped)
938	<	munmap(mmap_RAMBase, RAMSize);
938	>	vm_release((char *)RAM_BASE, RAMSize);
939
940		// Delete ROM area
941		if (rom_area_mapped)
942	<	munmap((char *)ROM_BASE, ROM_AREA_SIZE);
942	>	vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
943
944		// Delete Kernel Data area
945		if (kernel_area >= 0) {
#	Line 900 | Line 980 | static void Quit(void)
980		*/
981
982		#if EMULATED_PPC
903	–	extern void emul_ppc(uint32 start);
904	–	extern void init_emul_ppc(void);
983		void jump_to_rom(uint32 entry)
984		{
985		init_emul_ppc();
#	Line 970 | Line 1048 | void Execute68kTrap(uint16 trap, M68kReg
1048
1049
1050		/*
973	–	*  Execute PPC code from EMUL_OP routine (real mode switch)
974	–	*/
975	–
976	–	void ExecutePPC(void (*func)())
977	–	{
978	–	uint32 tvect[2] = {(uint32)func, 0};    // Fake TVECT
979	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
980	–	M68kRegisters r;
981	–	Execute68k((uint32)&desc, &r);
982	–	}
983	–
984	–
985	–	/*
1051		*  Quit emulator (cause return from jump_to_rom)
1052		*/
1053
#	Line 1041 | Line 1106 | void Dump68kRegs(M68kRegisters *r)
1106
1107		void MakeExecutable(int dummy, void *start, uint32 length)
1108		{
1109	<	#if !EMULATED_PPC
1045	<	if (((uint32)start >= ROM_BASE) && ((uint32)start < (ROM_BASE + ROM_SIZE)))
1109	>	if (((uintptr)start >= ROM_BASE) && ((uintptr)start < (ROM_BASE + ROM_SIZE)))
1110		return;
1111	<	flush_icache_range(start, (void *)((uint32)start + length));
1111	>	#if EMULATED_PPC
1112	>	FlushCodeCache((uintptr)start, (uintptr)start + length);
1113	>	#else
1114	>	flush_icache_range(start, (void *)((uintptr)start + length));
1115		#endif
1116		}
1117
#	Line 1055 | Line 1122 | void MakeExecutable(int dummy, void *sta
1122
1123		void PatchAfterStartup(void)
1124		{
1125	<	ExecutePPC(VideoInstallAccel);
1125	>	ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1126		InstallExtFS();
1127		}
1128
#	Line 1100 | Line 1167 | static void *tick_func(void *arg)
1167		if (emul_thread_fatal) {
1168
1169		// Yes, dump registers
1170	<	pt_regs *r = (pt_regs *)&sigsegv_regs;
1170	>	sigregs *r = &sigsegv_regs;
1171		char str[256];
1172	<	sprintf(str, "SIGSEGV\n"
1172	>	if (crash_reason == NULL)
1173	>	crash_reason = "SIGSEGV";
1174	>	sprintf(str, "%s\n"
1175		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1176		"  xer %08lx     cr %08lx  \n"
1177		"   r0 %08lx     r1 %08lx     r2 %08lx     r3 %08lx\n"
#	Line 1113 | Line 1182 | static void *tick_func(void *arg)
1182		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1183		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1184		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1185	+	crash_reason,
1186		r->nip, r->link, r->ctr, r->msr,
1187		r->xer, r->ccr,
1188		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1158 | Line 1228 | static void *tick_func(void *arg)
1228
1229		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1230		{
1231	<	// nothing to do
1231	>	#ifdef HAVE_PTHREADS
1232	>	pthread_attr_init(attr);
1233	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1234	>	// Some of these only work for superuser
1235	>	if (geteuid() == 0) {
1236	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1237	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1238	>	struct sched_param fifo_param;
1239	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1240	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1241	>	priority);
1242	>	pthread_attr_setschedparam(attr, &fifo_param);
1243	>	}
1244	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1245	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1246	>	// If system scope is not available (eg. we're not running
1247	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1248	>	// scope.  It exposes pthread scheduling to the kernel,
1249	>	// without setting realtime priority.
1250	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1251	>	#endif
1252	>	}
1253	>	#endif
1254	>	#endif
1255		}
1256
1257
#	Line 1166 | Line 1259 | void Set_pthread_attr(pthread_attr_t *at
1259		*  Mutexes
1260		*/
1261
1262	+	#ifdef HAVE_PTHREADS
1263	+
1264	+	struct B2_mutex {
1265	+	B2_mutex() {
1266	+	pthread_mutexattr_t attr;
1267	+	pthread_mutexattr_init(&attr);
1268	+	// Initialize the mutex for priority inheritance --
1269	+	// required for accurate timing.
1270	+	#ifdef HAVE_PTHREAD_MUTEXATTR_SETPROTOCOL
1271	+	pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
1272	+	#endif
1273	+	#if defined(HAVE_PTHREAD_MUTEXATTR_SETTYPE) && defined(PTHREAD_MUTEX_NORMAL)
1274	+	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_NORMAL);
1275	+	#endif
1276	+	#ifdef HAVE_PTHREAD_MUTEXATTR_SETPSHARED
1277	+	pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_PRIVATE);
1278	+	#endif
1279	+	pthread_mutex_init(&m, &attr);
1280	+	pthread_mutexattr_destroy(&attr);
1281	+	}
1282	+	~B2_mutex() {
1283	+	pthread_mutex_trylock(&m); // Make sure it's locked before
1284	+	pthread_mutex_unlock(&m);  // unlocking it.
1285	+	pthread_mutex_destroy(&m);
1286	+	}
1287	+	pthread_mutex_t m;
1288	+	};
1289	+
1290	+	B2_mutex *B2_create_mutex(void)
1291	+	{
1292	+	return new B2_mutex;
1293	+	}
1294	+
1295	+	void B2_lock_mutex(B2_mutex *mutex)
1296	+	{
1297	+	pthread_mutex_lock(&mutex->m);
1298	+	}
1299	+
1300	+	void B2_unlock_mutex(B2_mutex *mutex)
1301	+	{
1302	+	pthread_mutex_unlock(&mutex->m);
1303	+	}
1304	+
1305	+	void B2_delete_mutex(B2_mutex *mutex)
1306	+	{
1307	+	delete mutex;
1308	+	}
1309	+
1310	+	#else
1311	+
1312		struct B2_mutex {
1313		int dummy;
1314		};
#	Line 1188 | Line 1331 | void B2_delete_mutex(B2_mutex *mutex)
1331		delete mutex;
1332		}
1333
1334	+	#endif
1335	+
1336
1337		/*
1338		*  Trigger signal USR2 from another thread
1339		*/
1340
1341	+	#if !EMULATED_PPC || ASYNC_IRQ
1342		void TriggerInterrupt(void)
1343		{
1198	–	#if EMULATED_PPC
1199	–	WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
1200	–	#else
1201	–	#if 0
1202	–	WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
1203	–	#else
1344		if (ready_for_signals)
1345		pthread_kill(emul_thread, SIGUSR2);
1206	–	#endif
1207	–	#endif
1346		}
1347	+	#endif
1348
1349
1350		/*
#	Line 1245 | Line 1384 | void EnableInterrupt(void)
1384		}
1385
1386
1248	–	#if !EMULATED_PPC
1387		/*
1388		*  USR2 handler
1389		*/
1390
1391	<	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1391	>	#if EMULATED_PPC
1392	>	static void sigusr2_handler(int sig)
1393		{
1394	<	pt_regs *r = sc->regs;
1394	>	#if ASYNC_IRQ
1395	>	extern void HandleInterrupt(void);
1396	>	HandleInterrupt();
1397	>	#endif
1398	>	}
1399	>	#else
1400	>	static void sigusr2_handler(int sig, siginfo_t *sip, void *scp)
1401	>	{
1402	>	machine_regs *r = MACHINE_REGISTERS(scp);
1403
1404		// Do nothing if interrupts are disabled
1405		if (*(int32 *)XLM_IRQ_NEST > 0)
#	Line 1266 | Line 1413 | static void sigusr2_handler(int sig, sig
1413		case MODE_68K:
1414		// 68k emulator active, trigger 68k interrupt level 1
1415		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1416	<	r->ccr |= ntohl(kernel_data->v[0x674 >> 2]);
1416	>	r->cr() |= ntohl(kernel_data->v[0x674 >> 2]);
1417		break;
1418
1419		#if INTERRUPTS_IN_NATIVE_MODE
1420		case MODE_NATIVE:
1421		// 68k emulator inactive, in nanokernel?
1422	<	if (r->gpr[1] != KernelDataAddr) {
1422	>	if (r->gpr(1) != KernelDataAddr) {
1423		// Prepare for 68k interrupt level 1
1424		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1425		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) | ntohl(kernel_data->v[0x674 >> 2]));
#	Line 1319 | Line 1466 | static void sigusr2_handler(int sig, sig
1466		if (InterruptFlags & INTFLAG_VIA) {
1467		ClearInterruptFlag(INTFLAG_VIA);
1468		ADBInterrupt();
1469	<	ExecutePPC(VideoVBL);
1469	>	ExecuteNative(NATIVE_VIDEO_VBL);
1470		}
1471		}
1472		#endif
#	Line 1331 | Line 1478 | static void sigusr2_handler(int sig, sig
1478		}
1479		break;
1480		#endif
1334	–
1481		}
1482		}
1483	+	#endif
1484
1485
1486		/*
1487		*  SIGSEGV handler
1488		*/
1489
1490	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1490	>	#if !EMULATED_PPC
1491	>	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
1492		{
1493	<	pt_regs *r = sc->regs;
1493	>	machine_regs *r = MACHINE_REGISTERS(scp);
1494	>
1495	>	// Get effective address
1496	>	uint32 addr = r->dar();
1497	>
1498	>	#if ENABLE_VOSF
1499	>	// Handle screen fault.
1500	>	extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1501	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1502	>	return;
1503	>	#endif
1504	>
1505		num_segv++;
1506
1507		// Fault in Mac ROM or RAM?
1508	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1508	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1509		if (mac_fault) {
1510
1352	–	// Get opcode and divide into fields
1353	–	uint32 opcode = *((uint32 *)r->nip);
1354	–	uint32 primop = opcode >> 26;
1355	–	uint32 exop = (opcode >> 1) & 0x3ff;
1356	–	uint32 ra = (opcode >> 16) & 0x1f;
1357	–	uint32 rb = (opcode >> 11) & 0x1f;
1358	–	uint32 rd = (opcode >> 21) & 0x1f;
1359	–	int32 imm = (int16)(opcode & 0xffff);
1360	–
1511		// "VM settings" during MacOS 8 installation
1512	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1513	<	r->nip += 4;
1514	<	r->gpr[8] = 0;
1512	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1513	>	r->pc() += 4;
1514	>	r->gpr(8) = 0;
1515		return;
1516
1517		// MacOS 8.5 installation
1518	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1519	<	r->nip += 4;
1520	<	r->gpr[8] = 0;
1518	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1519	>	r->pc() += 4;
1520	>	r->gpr(8) = 0;
1521		return;
1522
1523		// MacOS 8 serial drivers on startup
1524	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 || r->gpr[8] == 0xf3012000)) {
1525	<	r->nip += 4;
1526	<	r->gpr[8] = 0;
1524	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 || r->gpr(8) == 0xf3012000)) {
1525	>	r->pc() += 4;
1526	>	r->gpr(8) = 0;
1527		return;
1528
1529		// MacOS 8.1 serial drivers on startup
1530	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1531	<	r->nip += 4;
1530	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1531	>	r->pc() += 4;
1532		return;
1533	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 || r->gpr[20] == 0xf3012000)) {
1534	<	r->nip += 4;
1533	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 || r->gpr(20) == 0xf3012000)) {
1534	>	r->pc() += 4;
1535		return;
1536		}
1537
1538	+	// Get opcode and divide into fields
1539	+	uint32 opcode = *((uint32 *)r->pc());
1540	+	uint32 primop = opcode >> 26;
1541	+	uint32 exop = (opcode >> 1) & 0x3ff;
1542	+	uint32 ra = (opcode >> 16) & 0x1f;
1543	+	uint32 rb = (opcode >> 11) & 0x1f;
1544	+	uint32 rd = (opcode >> 21) & 0x1f;
1545	+	int32 imm = (int16)(opcode & 0xffff);
1546	+
1547		// Analyze opcode
1548		enum {
1549		TYPE_UNKNOWN,
#	Line 1466 | Line 1625 | static void sigsegv_handler(int sig, sig
1625		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1626		case 45:        // sthu
1627		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1628	<	}
1629	<
1630	<	// Calculate effective address
1631	<	uint32 addr = 0;
1632	<	switch (addr_mode) {
1633	<	case MODE_X:
1634	<	case MODE_UX:
1635	<	if (ra == 0)
1636	<	addr = r->gpr[rb];
1637	<	else
1638	<	addr = r->gpr[ra] + r->gpr[rb];
1639	<	break;
1481	<	case MODE_NORM:
1482	<	case MODE_U:
1483	<	if (ra == 0)
1484	<	addr = (int32)(int16)imm;
1485	<	else
1486	<	addr = r->gpr[ra] + (int32)(int16)imm;
1628	>	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1629	>	case 46:        // lmw
1630	>	if (sig == SIGBUS) {
1631	>	uint32 ea = (ra == 0 ? 0 : r->gpr(ra)) + imm;
1632	>	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1633	>	for (int i = rd; i <= 31; i++) {
1634	>	r->gpr(i) = ReadMacInt32(ea);
1635	>	ea += 4;
1636	>	}
1637	>	r->pc() += 4;
1638	>	goto rti;
1639	>	}
1640		break;
1641	<	default:
1641	>	case 47:        // stmw
1642	>	if (sig == SIGBUS) {
1643	>	uint32 ea = (ra == 0 ? 0 : r->gpr(ra)) + imm;
1644	>	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1645	>	for (int i = rd; i <= 31; i++) {
1646	>	WriteMacInt32(ea, r->gpr(i));
1647	>	ea += 4;
1648	>	}
1649	>	r->pc() += 4;
1650	>	goto rti;
1651	>	}
1652		break;
1653	+	#endif
1654		}
1655	<
1655	>
1656		// Ignore ROM writes
1657		if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1658	<	//                      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));
1658	>	//                      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()));
1659		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1660	<	r->gpr[ra] = addr;
1661	<	r->nip += 4;
1660	>	r->gpr(ra) = addr;
1661	>	r->pc() += 4;
1662		goto rti;
1663		}
1664
1665		// Ignore illegal memory accesses?
1666		if (PrefsFindBool("ignoresegv")) {
1667		if (addr_mode == MODE_U || addr_mode == MODE_UX)
1668	<	r->gpr[ra] = addr;
1668	>	r->gpr(ra) = addr;
1669		if (transfer_type == TYPE_LOAD)
1670	<	r->gpr[rd] = 0;
1671	<	r->nip += 4;
1670	>	r->gpr(rd) = 0;
1671	>	r->pc() += 4;
1672		goto rti;
1673		}
1674
#	Line 1512 | Line 1676 | static void sigsegv_handler(int sig, sig
1676		if (!PrefsFindBool("nogui")) {
1677		char str[256];
1678		if (transfer_type == TYPE_LOAD || transfer_type == TYPE_STORE)
1679	<	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]);
1679	>	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));
1680		else
1681	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1681	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1682		ErrorAlert(str);
1683		QuitEmulator();
1684		return;
#	Line 1522 | Line 1686 | static void sigsegv_handler(int sig, sig
1686		}
1687
1688		// For all other errors, jump into debugger (sort of...)
1689	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1690		if (!ready_for_signals) {
1691	<	printf("SIGSEGV\n");
1692	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1691	>	printf("%s\n");
1692	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1693		printf(
1694		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1695		"  xer %08lx     cr %08lx  \n"
#	Line 1536 | Line 1701 | static void sigsegv_handler(int sig, sig
1701		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1702		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1703		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1704	<	r->nip, r->link, r->ctr, r->msr,
1705	<	r->xer, r->ccr,
1706	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1707	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1708	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1709	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1710	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1711	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1712	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1713	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1704	>	crash_reason,
1705	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1706	>	r->xer(), r->cr(),
1707	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1708	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1709	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1710	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1711	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1712	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1713	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1714	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1715		exit(1);
1716		QuitEmulator();
1717		return;
1718		} else {
1719		// We crashed. Save registers, tell tick thread and loop forever
1720	<	sigsegv_regs = *(sigregs *)r;
1720	>	build_sigregs(&sigsegv_regs, r);
1721		emul_thread_fatal = true;
1722		for (;;) ;
1723		}
#	Line 1563 | Line 1729 | rti:;
1729		*  SIGILL handler
1730		*/
1731
1732	<	static void sigill_handler(int sig, sigcontext_struct *sc)
1732	>	static void sigill_handler(int sig, siginfo_t *sip, void *scp)
1733		{
1734	<	pt_regs *r = sc->regs;
1734	>	machine_regs *r = MACHINE_REGISTERS(scp);
1735		char str[256];
1736
1737		// Fault in Mac ROM or RAM?
1738	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) || (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1738	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) || (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1739		if (mac_fault) {
1740
1741		// Get opcode and divide into fields
1742	<	uint32 opcode = *((uint32 *)r->nip);
1742	>	uint32 opcode = *((uint32 *)r->pc());
1743		uint32 primop = opcode >> 26;
1744		uint32 exop = (opcode >> 1) & 0x3ff;
1745		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1584 | Line 1750 | static void sigill_handler(int sig, sigc
1750		switch (primop) {
1751		case 9:         // POWER instructions
1752		case 22:
1753	<	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
1753	>	power_inst:             sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
1754		ErrorAlert(str);
1755		QuitEmulator();
1756		return;
#	Line 1592 | Line 1758 | power_inst:            sprintf(str, GetString(STR_
1758		case 31:
1759		switch (exop) {
1760		case 83:        // mfmsr
1761	<	r->gpr[rd] = 0xf072;
1762	<	r->nip += 4;
1761	>	r->gpr(rd) = 0xf072;
1762	>	r->pc() += 4;
1763		goto rti;
1764
1765		case 210:       // mtsr
1766		case 242:       // mtsrin
1767		case 306:       // tlbie
1768	<	r->nip += 4;
1768	>	r->pc() += 4;
1769		goto rti;
1770
1771		case 339: {     // mfspr
#	Line 1615 | Line 1781 | power_inst:            sprintf(str, GetString(STR_
1781		case 957:       // PMC3
1782		case 958:       // PMC4
1783		case 959:       // SDA
1784	<	r->nip += 4;
1784	>	r->pc() += 4;
1785		goto rti;
1786		case 25:        // SDR1
1787	<	r->gpr[rd] = 0xdead001f;
1788	<	r->nip += 4;
1787	>	r->gpr(rd) = 0xdead001f;
1788	>	r->pc() += 4;
1789		goto rti;
1790		case 287:       // PVR
1791	<	r->gpr[rd] = PVR;
1792	<	r->nip += 4;
1791	>	r->gpr(rd) = PVR;
1792	>	r->pc() += 4;
1793		goto rti;
1794		}
1795		break;
#	Line 1659 | Line 1825 | power_inst:            sprintf(str, GetString(STR_
1825		case 957:       // PMC3
1826		case 958:       // PMC4
1827		case 959:       // SDA
1828	<	r->nip += 4;
1828	>	r->pc() += 4;
1829		goto rti;
1830		}
1831		break;
#	Line 1678 | Line 1844 | power_inst:            sprintf(str, GetString(STR_
1844
1845		// In GUI mode, show error alert
1846		if (!PrefsFindBool("nogui")) {
1847	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1847	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1848		ErrorAlert(str);
1849		QuitEmulator();
1850		return;
#	Line 1686 | Line 1852 | power_inst:            sprintf(str, GetString(STR_
1852		}
1853
1854		// For all other errors, jump into debugger (sort of...)
1855	+	crash_reason = "SIGILL";
1856		if (!ready_for_signals) {
1857	<	printf("SIGILL\n");
1858	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1857	>	printf("%s\n");
1858	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1859		printf(
1860		"   pc %08lx     lr %08lx    ctr %08lx    msr %08lx\n"
1861		"  xer %08lx     cr %08lx  \n"
#	Line 1700 | Line 1867 | power_inst:            sprintf(str, GetString(STR_
1867		"  r20 %08lx    r21 %08lx    r22 %08lx    r23 %08lx\n"
1868		"  r24 %08lx    r25 %08lx    r26 %08lx    r27 %08lx\n"
1869		"  r28 %08lx    r29 %08lx    r30 %08lx    r31 %08lx\n",
1870	<	r->nip, r->link, r->ctr, r->msr,
1871	<	r->xer, r->ccr,
1872	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1873	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1874	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1875	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1876	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1877	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1878	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1879	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1870	>	crash_reason,
1871	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1872	>	r->xer(), r->cr(),
1873	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1874	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1875	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1876	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1877	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1878	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1879	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1880	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1881		exit(1);
1882		QuitEmulator();
1883		return;
1884		} else {
1885		// We crashed. Save registers, tell tick thread and loop forever
1886	<	sigsegv_regs = *(sigregs *)r;
1886	>	build_sigregs(&sigsegv_regs, r);
1887		emul_thread_fatal = true;
1888		for (;;) ;
1889		}
#	Line 1725 | Line 1893 | rti:;
1893
1894
1895		/*
1896	+	*  Helpers to share 32-bit addressable data with MacOS
1897	+	*/
1898	+
1899	+	bool SheepMem::Init(void)
1900	+	{
1901	+	const int page_size = getpagesize();
1902	+
1903	+	// Allocate SheepShaver globals
1904	+	if (vm_acquire_fixed((char *)base, size) < 0)
1905	+	return false;
1906	+
1907	+	// Allocate page with all bits set to 0
1908	+	zero_page = base + size;
1909	+	if (vm_acquire_fixed((char *)zero_page, page_size) < 0)
1910	+	return false;
1911	+	memset((char *)zero_page, 0, page_size);
1912	+	if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0)
1913	+	return false;
1914	+
1915	+	#if EMULATED_PPC
1916	+	// Allocate alternate stack for PowerPC interrupt routine
1917	+	sig_stack = zero_page + page_size;
1918	+	if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0)
1919	+	return false;
1920	+	#endif
1921	+
1922	+	top = base + size;
1923	+	return true;
1924	+	}
1925	+
1926	+	void SheepMem::Exit(void)
1927	+	{
1928	+	if (top) {
1929	+	const int page_size = getpagesize();
1930	+
1931	+	// Delete SheepShaver globals
1932	+	vm_release((void *)base, size);
1933	+
1934	+	// Delete zero page
1935	+	vm_release((void *)zero_page, page_size);
1936	+
1937	+	#if EMULATED_PPC
1938	+	// Delete alternate stack for PowerPC interrupt routine
1939	+	vm_release((void *)sig_stack, SIG_STACK_SIZE);
1940	+	#endif
1941	+	}
1942	+	}
1943	+
1944	+
1945	+	/*
1946		*  Display alert
1947		*/
1948

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