[ViewVC] Diff of: cebix/SheepShaver/src/Unix/main

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.13 by gbeauche, 2003-11-03T21:28:25Z vs.
Revision 1.38 by gbeauche, 2004-05-31T10:55:42Z

#	Line 1 \| Line 1
1		/*
2		* main_unix.cpp - Emulation core, Unix implementation
3		*
4	<	* SheepShaver (C) 1997-2002 Christian Bauer and Marc Hellwig
4	>	* SheepShaver (C) 1997-2004 Christian Bauer and Marc Hellwig
5		*
6		* This program is free software; you can redistribute it and/or modify
7		* it under the terms of the GNU General Public License as published by
#	Line 65 \| Line 65
65		* ExecutePPC (or any function that might cause a mode switch). The signal
66		* stack is restored before exiting the SIGUSR2 handler.
67		*
68	+	* There is apparently another problem when processing signals. In
69	+	* fullscreen mode, we get quick updates of the mouse position. This
70	+	* causes an increased number of calls to TriggerInterrupt(). And,
71	+	* since IRQ_NEST is not fully handled atomically, nested calls to
72	+	* ppc_interrupt() may cause stack corruption to eventually crash the
73	+	* emulator.
74	+	*
75	+	* FIXME:
76	+	* The current solution is to allocate another signal stack when
77	+	* processing ppc_interrupt(). However, it may be better to detect
78	+	* the INTFLAG_ADB case and handle it specifically with some extra mutex?
79	+	*
80		* TODO:
81		* check if SIGSEGV handler works for all registers (including FP!)
82		*/
#	Line 109 \| Line 121
121		#include "user_strings.h"
122		#include "vm_alloc.h"
123		#include "sigsegv.h"
124	+	#include "thunks.h"
125
126		#define DEBUG 0
127		#include "debug.h"
#	Line 131 \| 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 140 \| 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 RAM_BASE = 0x20000000; // Base address of RAM
167	>	const uintptr RAM_BASE = 0x20000000; // Base address of RAM
168		const uint32 SIG_STACK_SIZE = 0x10000; // Size of signal stack
169
170
171		#if !EMULATED_PPC
153	–	// Structure in which registers are saved in a signal handler;
154	–	// sigcontext->regs points to it
155	–	// (see arch/ppc/kernel/signal.c)
156	–	typedef struct {
157	–	uint32 u[4];
158	–	} __attribute((aligned(16))) vector128;
159	–	#include <linux/elf.h>
160	–
172		struct sigregs {
173	<	elf_gregset_t gp_regs; // Identical to pt_regs
174	<	double fp_regs[ELF_NFPREG]; // f0..f31 and fpsrc
175	<	//more (uninteresting) stuff following here
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	>	#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	+	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	+	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
260		// Global variables (exported)
261		#if !EMULATED_PPC
#	Line 172 \| Line 263 \| *void TOC; // Small data pointer (r13**
263		#endif
264		uint32 RAMBase; // Base address of Mac RAM
265		uint32 RAMSize; // Size of Mac RAM
175	–	uint32 SheepStack1Base; // SheepShaver first alternate stack base
176	–	uint32 SheepStack2Base; // SheepShaver second alternate stack base
177	–	uint32 SheepThunksBase; // SheepShaver thunks base
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)
#	Line 185 \| Line 274 \| int64 BusClockSpeed; // Bus clock speed
274		// Global variables
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
190	–	static bool sheep_area_mapped = false; // Flag: SheepShaver data area mmap()ed
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 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
#	Line 207 \| Line 300 \| static bool ready_for_signals = false;
300		static int64 num_segv = 0; // Number of handled SEGV signals
301
302		static struct sigaction sigusr2_action; // Interrupt signal (of emulator thread)
303	<	#if !EMULATED_PPC
303	>	#if EMULATED_PPC
304	>	static uintptr sig_stack = 0; // Stack for PowerPC interrupt routine
305	>	#else
306		static struct sigaction sigsegv_action; // Data access exception signal (of emulator thread)
307		static struct sigaction sigill_action; // Illegal instruction signal (of emulator thread)
213	–	static void *sig_stack = NULL; // Stack for signal handlers
214	–	static void *extra_stack = NULL; // Stack for SIGSEGV inside interrupt handler
308		static bool emul_thread_fatal = false; // Flag: MacOS thread crashed, tick thread shall dump debug output
309		static sigregs sigsegv_regs; // Register dump when crashed
310	+	static const char *crash_reason = NULL; // Reason of the crash (SIGSEGV, SIGBUS, SIGILL)
311		#endif
312
313	+	uint32 SheepMem::page_size; // Size of a native page
314	+	uintptr SheepMem::zero_page = 0; // Address of ro page filled in with zeros
315	+	uintptr SheepMem::base = 0x60000000; // Address of SheepShaver data
316	+	uintptr SheepMem::top = 0; // Top of SheepShaver data (stack like storage)
317	+
318
319		// Prototypes
320		static void Quit(void);
#	Line 223 \| Line 322 \| *static void emul_func(void arg);*
322		static void nvram_func(void arg);
323		static void tick_func(void arg);
324		#if EMULATED_PPC
226	–	static void sigusr2_handler(int sig);
325		extern void emul_ppc(uint32 start);
326		extern void init_emul_ppc(void);
327		extern void exit_emul_ppc(void);
328		#else
329	<	static void sigusr2_handler(int sig, sigcontext_struct *sc);
330	<	static void sigsegv_handler(int sig, sigcontext_struct *sc);
331	<	static void sigill_handler(int sig, sigcontext_struct *sc);
329	>	static void sigusr2_handler(int sig, siginfo_t sip, void scp);
330	>	static void sigsegv_handler(int sig, siginfo_t sip, void scp);
331	>	static void sigill_handler(int sig, siginfo_t sip, void scp);
332		#endif
333
334
#	Line 252 \| Line 350 \| extern void paranoia_check(void);
350
351		#if EMULATED_PPC
352		/*
353	+	* Return signal stack base
354	+	*/
355	+
356	+	uintptr SignalStackBase(void)
357	+	{
358	+	return sig_stack + SIG_STACK_SIZE;
359	+	}
360	+
361	+
362	+	/*
363		* Atomic operations
364		*/
365
#	Line 375 \| Line 483 \| int main(int argc, char argv)**
483		PVR = 0x00040000; // Default: 604
484		CPUClockSpeed = 100000000; // Default: 100MHz
485		BusClockSpeed = 100000000; // Default: 100MHz
486	<	#if !EMULATED_PPC
486	>	#if EMULATED_PPC
487	>	PVR = 0x000c0000; // Default: 7400 (with AltiVec)
488	>	#else
489		proc_file = fopen("/proc/cpuinfo", "r");
490		if (proc_file) {
491		char line[256];
#	Line 389 \| Line 499 \| int main(int argc, char argv)**
499		// Parse line
500		int i;
501		char value[256];
502	<	if (sscanf(line, "cpu : %s", value) == 1) {
502	>	if (sscanf(line, "cpu : %[0-9A-Za-a]", value) == 1) {
503		if (strcmp(value, "601") == 0)
504		PVR = 0x00010000;
505		else if (strcmp(value, "603") == 0)
#	Line 410 \| Line 520 \| int main(int argc, char argv)**
520		PVR = 0x00320000;
521		else if (strcmp(value, "860") == 0)
522		PVR = 0x00500000;
523	+	else if (strcmp(value, "7400") == 0)
524	+	PVR = 0x000c0000;
525	+	else if (strcmp(value, "7410") == 0)
526	+	PVR = 0x800c0000;
527		else
528		printf("WARNING: Unknown CPU type '%s', assuming 604\n", value);
529		}
#	Line 421 \| Line 535 \| int main(int argc, char argv)**
535		sprintf(str, GetString(STR_PROC_CPUINFO_WARN), strerror(errno));
536		WarningAlert(str);
537		}
538	+
539	+	// Get actual bus frequency
540	+	proc_file = fopen("/proc/device-tree/clock-frequency", "r");
541	+	if (proc_file) {
542	+	union { uint8 b[4]; uint32 l; } value;
543	+	if (fread(value.b, sizeof(value), 1, proc_file) == 1)
544	+	BusClockSpeed = value.l;
545	+	fclose(proc_file);
546	+	}
547		#endif
548		D(bug("PVR: %08x (assumed)\n", PVR));
549
#	Line 445 \| Line 568 \| int main(int argc, char argv)**
568		goto quit;
569		}
570
571	+	#ifndef PAGEZERO_HACK
572		// Create Low Memory area (0x0000..0x3000)
573		if (vm_acquire_fixed((char *)0, 0x3000) < 0) {
574		sprintf(str, GetString(STR_LOW_MEM_MMAP_ERR), strerror(errno));
#	Line 452 \| Line 576 \| int main(int argc, char argv)**
576		goto quit;
577		}
578		lm_area_mapped = true;
579	+	#endif
580
581		// Create areas for Kernel Data
582		kernel_area = shmget(IPC_PRIVATE, KERNEL_AREA_SIZE, 0600);
#	Line 470 \| Line 595 \| int main(int argc, char argv)**
595		ErrorAlert(str);
596		goto quit;
597		}
598	<	kernel_data = (KernelData *)0x68ffe000;
598	>	kernel_data = (KernelData *)KERNEL_DATA_BASE;
599		emulator_data = &kernel_data->ed;
600	<	KernelDataAddr = (uint32)kernel_data;
600	>	KernelDataAddr = KERNEL_DATA_BASE;
601		D(bug("Kernel Data at %p, Emulator Data at %p\n", kernel_data, emulator_data));
602
603	+	// Create area for DR Cache
604	+	if (vm_acquire_fixed((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE) < 0) {
605	+	sprintf(str, GetString(STR_DR_EMULATOR_MMAP_ERR), strerror(errno));
606	+	ErrorAlert(str);
607	+	goto quit;
608	+	}
609	+	dr_emulator_area_mapped = true;
610	+	if (vm_acquire_fixed((void *)DR_CACHE_BASE, DR_CACHE_SIZE) < 0) {
611	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
612	+	ErrorAlert(str);
613	+	goto quit;
614	+	}
615	+	dr_cache_area_mapped = true;
616	+	#if !EMULATED_PPC
617	+	if (vm_protect((char *)DR_CACHE_BASE, DR_CACHE_SIZE, VM_PAGE_READ \| VM_PAGE_WRITE \| VM_PAGE_EXECUTE) < 0) {
618	+	sprintf(str, GetString(STR_DR_CACHE_MMAP_ERR), strerror(errno));
619	+	ErrorAlert(str);
620	+	goto quit;
621	+	}
622	+	#endif
623	+	DRCacheAddr = DR_CACHE_BASE;
624	+	D(bug("DR Cache at %p\n", DRCacheAddr));
625	+
626		// Create area for SheepShaver data
627	<	if (vm_acquire_fixed((char *)SHEEP_BASE, SHEEP_SIZE) < 0) {
627	>	if (!SheepMem::Init()) {
628		sprintf(str, GetString(STR_SHEEP_MEM_MMAP_ERR), strerror(errno));
629		ErrorAlert(str);
630		goto quit;
631		}
484	–	SheepStack1Base = SHEEP_BASE + 0x10000;
485	–	SheepStack2Base = SheepStack1Base + 0x10000;
486	–	SheepThunksBase = SheepStack2Base + 0x1000;
487	–	sheep_area_mapped = true;
632
633		// Create area for Mac ROM
634		if (vm_acquire_fixed((char *)ROM_BASE, ROM_AREA_SIZE) < 0) {
#	Line 492 \| Line 636 \| int main(int argc, char argv)**
636		ErrorAlert(str);
637		goto quit;
638		}
639	<	#if !EMULATED_PPC \|\| defined(__powerpc__)
639	>	#if !EMULATED_PPC
640		if (vm_protect((char *)ROM_BASE, ROM_AREA_SIZE, VM_PAGE_READ \| VM_PAGE_WRITE \| VM_PAGE_EXECUTE) < 0) {
641		sprintf(str, GetString(STR_ROM_MMAP_ERR), strerror(errno));
642		ErrorAlert(str);
#	Line 562 \| Line 706 \| int main(int argc, char argv)**
706		// Load NVRAM
707		XPRAMInit();
708
709	+	// Load XPRAM default values if signature not found
710	+	if (XPRAM[0x130c] != 0x4e \|\| XPRAM[0x130d] != 0x75
711	+	\|\| XPRAM[0x130e] != 0x4d \|\| XPRAM[0x130f] != 0x63) {
712	+	D(bug("Loading XPRAM default values\n"));
713	+	memset(XPRAM + 0x1300, 0, 0x100);
714	+	XPRAM[0x130c] = 0x4e; // "NuMc" signature
715	+	XPRAM[0x130d] = 0x75;
716	+	XPRAM[0x130e] = 0x4d;
717	+	XPRAM[0x130f] = 0x63;
718	+	XPRAM[0x1301] = 0x80; // InternalWaitFlags = DynWait (don't wait for SCSI devices upon bootup)
719	+	XPRAM[0x1310] = 0xa8; // Standard PRAM values
720	+	XPRAM[0x1311] = 0x00;
721	+	XPRAM[0x1312] = 0x00;
722	+	XPRAM[0x1313] = 0x22;
723	+	XPRAM[0x1314] = 0xcc;
724	+	XPRAM[0x1315] = 0x0a;
725	+	XPRAM[0x1316] = 0xcc;
726	+	XPRAM[0x1317] = 0x0a;
727	+	XPRAM[0x131c] = 0x00;
728	+	XPRAM[0x131d] = 0x02;
729	+	XPRAM[0x131e] = 0x63;
730	+	XPRAM[0x131f] = 0x00;
731	+	XPRAM[0x1308] = 0x13;
732	+	XPRAM[0x1309] = 0x88;
733	+	XPRAM[0x130a] = 0x00;
734	+	XPRAM[0x130b] = 0xcc;
735	+	XPRAM[0x1376] = 0x00; // OSDefault = MacOS
736	+	XPRAM[0x1377] = 0x01;
737	+	}
738	+
739		// Set boot volume
740		i16 = PrefsFindInt32("bootdrive");
741		XPRAM[0x1378] = i16 >> 8;
#	Line 579 \| Line 753 \| int main(int argc, char argv)**
753		boot_globs[1] = htonl(RAMSize);
754		boot_globs[2] = htonl((uint32)-1); // End of bank table
755
756	+	// Init thunks
757	+	if (!ThunksInit())
758	+	goto quit;
759	+
760		// Init drivers
761		SonyInit();
762		DiskInit();
#	Line 588 \| Line 766 \| int main(int argc, char argv)**
766		// Init external file system
767		ExtFSInit();
768
769	+	// Init ADB
770	+	ADBInit();
771	+
772		// Init audio
773		AudioInit();
774
#	Line 622 \| Line 803 \| int main(int argc, char argv)**
803		// Initialize Kernel Data
804		memset(kernel_data, 0, sizeof(KernelData));
805		if (ROMType == ROMTYPE_NEWWORLD) {
806	<	static uint32 of_dev_tree[4] = {0, 0, 0, 0};
807	<	static uint8 vector_lookup_tbl[128];
808	<	static uint8 vector_mask_tbl[64];
806	>	uintptr of_dev_tree = SheepMem::Reserve(4 * sizeof(uint32));
807	>	memset((void )of_dev_tree, 0, 4 sizeof(uint32));
808	>	uintptr vector_lookup_tbl = SheepMem::Reserve(128);
809	>	uintptr vector_mask_tbl = SheepMem::Reserve(64);
810		memset((uint8 *)kernel_data + 0xb80, 0x3d, 0x80);
811	<	memset(vector_lookup_tbl, 0, 128);
812	<	memset(vector_mask_tbl, 0, 64);
811	>	memset((void *)vector_lookup_tbl, 0, 128);
812	>	memset((void *)vector_mask_tbl, 0, 64);
813		kernel_data->v[0xb80 >> 2] = htonl(ROM_BASE);
814	<	kernel_data->v[0xb84 >> 2] = htonl((uint32)of_dev_tree); // OF device tree base
815	<	kernel_data->v[0xb90 >> 2] = htonl((uint32)vector_lookup_tbl);
816	<	kernel_data->v[0xb94 >> 2] = htonl((uint32)vector_mask_tbl);
814	>	kernel_data->v[0xb84 >> 2] = htonl(of_dev_tree); // OF device tree base
815	>	kernel_data->v[0xb90 >> 2] = htonl(vector_lookup_tbl);
816	>	kernel_data->v[0xb94 >> 2] = htonl(vector_mask_tbl);
817		kernel_data->v[0xb98 >> 2] = htonl(ROM_BASE); // OpenPIC base
818		kernel_data->v[0xbb0 >> 2] = htonl(0); // ADB base
819		kernel_data->v[0xc20 >> 2] = htonl(RAMSize);
#	Line 644 \| Line 826 \| int main(int argc, char argv)**
826		kernel_data->v[0xc50 >> 2] = htonl(RAMBase);
827		kernel_data->v[0xc54 >> 2] = htonl(RAMSize);
828		kernel_data->v[0xf60 >> 2] = htonl(PVR);
829	<	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed);
830	<	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed);
831	<	kernel_data->v[0xf6c >> 2] = htonl(CPUClockSpeed);
829	>	kernel_data->v[0xf64 >> 2] = htonl(CPUClockSpeed); // clock-frequency
830	>	kernel_data->v[0xf68 >> 2] = htonl(BusClockSpeed); // bus-frequency
831	>	kernel_data->v[0xf6c >> 2] = htonl(BusClockSpeed / 4); // timebase-frequency
832		} else {
833		kernel_data->v[0xc80 >> 2] = htonl(RAMSize);
834		kernel_data->v[0xc84 >> 2] = htonl(RAMSize);
#	Line 658 \| Line 840 \| int main(int argc, char argv)**
840		kernel_data->v[0xcb0 >> 2] = htonl(RAMBase);
841		kernel_data->v[0xcb4 >> 2] = htonl(RAMSize);
842		kernel_data->v[0xf80 >> 2] = htonl(PVR);
843	<	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed);
844	<	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed);
845	<	kernel_data->v[0xf8c >> 2] = htonl(CPUClockSpeed);
843	>	kernel_data->v[0xf84 >> 2] = htonl(CPUClockSpeed); // clock-frequency
844	>	kernel_data->v[0xf88 >> 2] = htonl(BusClockSpeed); // bus-frequency
845	>	kernel_data->v[0xf8c >> 2] = htonl(BusClockSpeed / 4); // timebase-frequency
846		}
847
848		// Initialize extra low memory
849		D(bug("Initializing Low Memory...\n"));
850		memset(NULL, 0, 0x3000);
851		WriteMacInt32(XLM_SIGNATURE, FOURCC('B','a','a','h')); // Signature to detect SheepShaver
852	<	WriteMacInt32(XLM_KERNEL_DATA, (uint32)kernel_data); // For trap replacement routines
852	>	WriteMacInt32(XLM_KERNEL_DATA, KernelDataAddr); // For trap replacement routines
853		WriteMacInt32(XLM_PVR, PVR); // Theoretical PVR
854		WriteMacInt32(XLM_BUS_CLOCK, BusClockSpeed); // For DriverServicesLib patch
855		WriteMacInt16(XLM_EXEC_RETURN_OPCODE, M68K_EXEC_RETURN); // For Execute68k() (RTS from the executed 68k code will jump here and end 68k mode)
856	<	#if EMULATED_PPC
857	<	WriteMacInt32(XLM_ETHER_INIT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_INIT));
858	<	WriteMacInt32(XLM_ETHER_TERM, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_TERM));
677	<	WriteMacInt32(XLM_ETHER_OPEN, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_OPEN));
678	<	WriteMacInt32(XLM_ETHER_CLOSE, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_CLOSE));
679	<	WriteMacInt32(XLM_ETHER_WPUT, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_WPUT));
680	<	WriteMacInt32(XLM_ETHER_RSRV, POWERPC_NATIVE_OP_FUNC(NATIVE_ETHER_RSRV));
681	<	WriteMacInt32(XLM_VIDEO_DOIO, POWERPC_NATIVE_OP_FUNC(NATIVE_VIDEO_DO_DRIVER_IO));
682	<	#else
683	<	WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator
684	<	WriteMacInt32(XLM_ETHER_INIT, (uint32)InitStreamModule); // DLPI ethernet driver functions
685	<	WriteMacInt32(XLM_ETHER_TERM, (uint32)TerminateStreamModule);
686	<	WriteMacInt32(XLM_ETHER_OPEN, (uint32)ether_open);
687	<	WriteMacInt32(XLM_ETHER_CLOSE, (uint32)ether_close);
688	<	WriteMacInt32(XLM_ETHER_WPUT, (uint32)ether_wput);
689	<	WriteMacInt32(XLM_ETHER_RSRV, (uint32)ether_rsrv);
690	<	WriteMacInt32(XLM_VIDEO_DOIO, (uint32)VideoDoDriverIO);
856	>	WriteMacInt32(XLM_ZERO_PAGE, SheepMem::ZeroPage()); // Pointer to read-only page with all bits set to 0
857	>	#if !EMULATED_PPC
858	>	WriteMacInt32(XLM_TOC, (uint32)TOC); // TOC pointer of emulator
859		#endif
860	+	WriteMacInt32(XLM_ETHER_INIT, NativeFunction(NATIVE_ETHER_INIT)); // DLPI ethernet driver functions
861	+	WriteMacInt32(XLM_ETHER_TERM, NativeFunction(NATIVE_ETHER_TERM));
862	+	WriteMacInt32(XLM_ETHER_OPEN, NativeFunction(NATIVE_ETHER_OPEN));
863	+	WriteMacInt32(XLM_ETHER_CLOSE, NativeFunction(NATIVE_ETHER_CLOSE));
864	+	WriteMacInt32(XLM_ETHER_WPUT, NativeFunction(NATIVE_ETHER_WPUT));
865	+	WriteMacInt32(XLM_ETHER_RSRV, NativeFunction(NATIVE_ETHER_RSRV));
866	+	WriteMacInt32(XLM_VIDEO_DOIO, NativeFunction(NATIVE_VIDEO_DO_DRIVER_IO));
867		D(bug("Low Memory initialized\n"));
868
869		// Start 60Hz thread
#	Line 702 \| Line 877 \| int main(int argc, char argv)**
877
878		#if !EMULATED_PPC
879		// Create and install stacks for signal handlers
880	<	sig_stack = malloc(SIG_STACK_SIZE);
881	<	D(bug("Signal stack at %p\n", sig_stack));
882	<	if (sig_stack == NULL) {
883	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
884	<	goto quit;
885	<	}
886	<	extra_stack = malloc(SIG_STACK_SIZE);
887	<	D(bug("Extra stack at %p\n", extra_stack));
888	<	if (extra_stack == NULL) {
889	<	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
890	<	goto quit;
891	<	}
892	<	struct sigaltstack new_stack;
718	<	new_stack.ss_sp = sig_stack;
719	<	new_stack.ss_flags = 0;
720	<	new_stack.ss_size = SIG_STACK_SIZE;
721	<	if (sigaltstack(&new_stack, NULL) < 0) {
880	>	for (int i = 0; i < SIG_STACK_COUNT; i++) {
881	>	void *sig_stack = malloc(SIG_STACK_SIZE);
882	>	D(bug("Signal stack %d at %p\n", i, sig_stack));
883	>	if (sig_stack == NULL) {
884	>	ErrorAlert(GetString(STR_NOT_ENOUGH_MEMORY_ERR));
885	>	goto quit;
886	>	}
887	>	sig_stacks[i].ss_sp = sig_stack;
888	>	sig_stacks[i].ss_flags = 0;
889	>	sig_stacks[i].ss_size = SIG_STACK_SIZE;
890	>	}
891	>	sig_stack_id = 0;
892	>	if (sigaltstack(&sig_stacks[0], NULL) < 0) {
893		sprintf(str, GetString(STR_SIGALTSTACK_ERR), strerror(errno));
894		ErrorAlert(str);
895		goto quit;
#	Line 726 \| Line 897 \| int main(int argc, char argv)**
897		#endif
898
899		#if !EMULATED_PPC
900	<	// Install SIGSEGV handler
900	>	// Install SIGSEGV and SIGBUS handlers
901		sigemptyset(&sigsegv_action.sa_mask); // Block interrupts during SEGV handling
902		sigaddset(&sigsegv_action.sa_mask, SIGUSR2);
903	<	sigsegv_action.sa_handler = (__sighandler_t)sigsegv_handler;
904	<	sigsegv_action.sa_flags = SA_ONSTACK;
903	>	sigsegv_action.sa_sigaction = sigsegv_handler;
904	>	sigsegv_action.sa_flags = SA_ONSTACK \| SA_SIGINFO;
905	>	#ifdef HAVE_SIGNAL_SA_RESTORER
906		sigsegv_action.sa_restorer = NULL;
907	+	#endif
908		if (sigaction(SIGSEGV, &sigsegv_action, NULL) < 0) {
909		sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
910		ErrorAlert(str);
911		goto quit;
912		}
913	+	if (sigaction(SIGBUS, &sigsegv_action, NULL) < 0) {
914	+	sprintf(str, GetString(STR_SIGSEGV_INSTALL_ERR), strerror(errno));
915	+	ErrorAlert(str);
916	+	goto quit;
917	+	}
918
919		// Install SIGILL handler
920		sigemptyset(&sigill_action.sa_mask); // Block interrupts during ILL handling
921		sigaddset(&sigill_action.sa_mask, SIGUSR2);
922	<	sigill_action.sa_handler = (__sighandler_t)sigill_handler;
923	<	sigill_action.sa_flags = SA_ONSTACK;
922	>	sigill_action.sa_sigaction = sigill_handler;
923	>	sigill_action.sa_flags = SA_ONSTACK \| SA_SIGINFO;
924	>	#ifdef HAVE_SIGNAL_SA_RESTORER
925		sigill_action.sa_restorer = NULL;
926	+	#endif
927		if (sigaction(SIGILL, &sigill_action, NULL) < 0) {
928		sprintf(str, GetString(STR_SIGILL_INSTALL_ERR), strerror(errno));
929		ErrorAlert(str);
#	Line 751 \| Line 931 \| int main(int argc, char argv)**
931		}
932		#endif
933
934	+	#if !EMULATED_PPC
935		// Install interrupt signal handler
936		sigemptyset(&sigusr2_action.sa_mask);
937	<	sigusr2_action.sa_handler = (__sighandler_t)sigusr2_handler;
938	<	sigusr2_action.sa_flags = 0;
939	<	#if !EMULATED_PPC
759	<	sigusr2_action.sa_flags = SA_ONSTACK \| SA_RESTART;
760	<	#endif
937	>	sigusr2_action.sa_sigaction = sigusr2_handler;
938	>	sigusr2_action.sa_flags = SA_ONSTACK \| SA_RESTART \| SA_SIGINFO;
939	>	#ifdef HAVE_SIGNAL_SA_RESTORER
940		sigusr2_action.sa_restorer = NULL;
941	+	#endif
942		if (sigaction(SIGUSR2, &sigusr2_action, NULL) < 0) {
943		sprintf(str, GetString(STR_SIGUSR2_INSTALL_ERR), strerror(errno));
944		ErrorAlert(str);
945		goto quit;
946		}
947	+	#endif
948
949		// Get my thread ID and execute MacOS thread function
950		emul_thread = pthread_self();
#	Line 800 \| Line 981 \| static void Quit(void)
981		}
982
983		#if !EMULATED_PPC
984	<	// Uninstall SIGSEGV handler
984	>	// Uninstall SIGSEGV and SIGBUS handlers
985		sigemptyset(&sigsegv_action.sa_mask);
986		sigsegv_action.sa_handler = SIG_DFL;
987		sigsegv_action.sa_flags = 0;
988		sigaction(SIGSEGV, &sigsegv_action, NULL);
989	+	sigaction(SIGBUS, &sigsegv_action, NULL);
990
991		// Uninstall SIGILL handler
992		sigemptyset(&sigill_action.sa_mask);
993		sigill_action.sa_handler = SIG_DFL;
994		sigill_action.sa_flags = 0;
995		sigaction(SIGILL, &sigill_action, NULL);
996	+
997	+	// Delete stacks for signal handlers
998	+	for (int i = 0; i < SIG_STACK_COUNT; i++) {
999	+	void *sig_stack = sig_stacks[i].ss_sp;
1000	+	if (sig_stack)
1001	+	free(sig_stack);
1002	+	}
1003		#endif
1004
1005		// Save NVRAM
#	Line 831 \| Line 1020 \| static void Quit(void)
1020		// Exit audio
1021		AudioExit();
1022
1023	+	// Exit ADB
1024	+	ADBExit();
1025	+
1026		// Exit video
1027		VideoExit();
1028
#	Line 843 \| Line 1035 \| static void Quit(void)
1035		DiskExit();
1036		SonyExit();
1037
1038	+	// Delete thunks
1039	+	ThunksExit();
1040	+
1041	+	// Delete SheepShaver globals
1042	+	SheepMem::Exit();
1043	+
1044		// Delete RAM area
1045		if (ram_area_mapped)
1046		vm_release((char *)RAM_BASE, RAMSize);
#	Line 851 \| Line 1049 \| static void Quit(void)
1049		if (rom_area_mapped)
1050		vm_release((char *)ROM_BASE, ROM_AREA_SIZE);
1051
1052	+	// Delete DR cache areas
1053	+	if (dr_emulator_area_mapped)
1054	+	vm_release((void *)DR_EMULATOR_BASE, DR_EMULATOR_SIZE);
1055	+	if (dr_cache_area_mapped)
1056	+	vm_release((void *)DR_CACHE_BASE, DR_CACHE_SIZE);
1057	+
1058		// Delete Kernel Data area
1059		if (kernel_area >= 0) {
1060		shmdt((void *)KERNEL_DATA_BASE);
#	Line 954 \| Line 1158 \| void Execute68kTrap(uint16 trap, M68kReg
1158		uint16 proc[2] = {trap, M68K_RTS};
1159		Execute68k((uint32)proc, r);
1160		}
957	–
958	–
959	–	/*
960	–	* Execute PPC code from EMUL_OP routine (real mode switch)
961	–	*/
962	–
963	–	void ExecutePPC(void (*func)())
964	–	{
965	–	uint32 tvect[2] = {(uint32)func, 0}; // Fake TVECT
966	–	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
967	–	M68kRegisters r;
968	–	Execute68k((uint32)&desc, &r);
969	–	}
1161		#endif
1162
1163
#	Line 1045 \| Line 1236 \| *void MakeExecutable(int dummy, void sta**
1236
1237		void PatchAfterStartup(void)
1238		{
1048	–	#if EMULATED_PPC
1239		ExecuteNative(NATIVE_VIDEO_INSTALL_ACCEL);
1050	–	#else
1051	–	ExecutePPC(VideoInstallAccel);
1052	–	#endif
1240		InstallExtFS();
1241		}
1242
#	Line 1094 \| Line 1281 \| *static void tick_func(void arg)*
1281		if (emul_thread_fatal) {
1282
1283		// Yes, dump registers
1284	<	pt_regs r = (pt_regs )&sigsegv_regs;
1284	>	sigregs *r = &sigsegv_regs;
1285		char str[256];
1286	<	sprintf(str, "SIGSEGV\n"
1286	>	if (crash_reason == NULL)
1287	>	crash_reason = "SIGSEGV";
1288	>	sprintf(str, "%s\n"
1289		" pc %08lx lr %08lx ctr %08lx msr %08lx\n"
1290		" xer %08lx cr %08lx \n"
1291		" r0 %08lx r1 %08lx r2 %08lx r3 %08lx\n"
#	Line 1107 \| Line 1296 \| *static void tick_func(void arg)*
1296		" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
1297		" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
1298		" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
1299	+	crash_reason,
1300		r->nip, r->link, r->ctr, r->msr,
1301		r->xer, r->ccr,
1302		r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
#	Line 1152 \| Line 1342 \| *static void tick_func(void arg)*
1342
1343		void Set_pthread_attr(pthread_attr_t *attr, int priority)
1344		{
1345	<	// nothing to do
1345	>	#ifdef HAVE_PTHREADS
1346	>	pthread_attr_init(attr);
1347	>	#if defined(_POSIX_THREAD_PRIORITY_SCHEDULING)
1348	>	// Some of these only work for superuser
1349	>	if (geteuid() == 0) {
1350	>	pthread_attr_setinheritsched(attr, PTHREAD_EXPLICIT_SCHED);
1351	>	pthread_attr_setschedpolicy(attr, SCHED_FIFO);
1352	>	struct sched_param fifo_param;
1353	>	fifo_param.sched_priority = ((sched_get_priority_min(SCHED_FIFO) +
1354	>	sched_get_priority_max(SCHED_FIFO)) / 2 +
1355	>	priority);
1356	>	pthread_attr_setschedparam(attr, &fifo_param);
1357	>	}
1358	>	if (pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0) {
1359	>	#ifdef PTHREAD_SCOPE_BOUND_NP
1360	>	// If system scope is not available (eg. we're not running
1361	>	// with CAP_SCHED_MGT capability on an SGI box), try bound
1362	>	// scope. It exposes pthread scheduling to the kernel,
1363	>	// without setting realtime priority.
1364	>	pthread_attr_setscope(attr, PTHREAD_SCOPE_BOUND_NP);
1365	>	#endif
1366	>	}
1367	>	#endif
1368	>	#endif
1369		}
1370
1371
#	Line 1239 \| Line 1452 \| *void B2_delete_mutex(B2_mutex mutex)**
1452		* Trigger signal USR2 from another thread
1453		*/
1454
1455	<	#if !EMULATED_PPC \|\| ASYNC_IRQ
1455	>	#if !EMULATED_PPC
1456		void TriggerInterrupt(void)
1457		{
1458		if (ready_for_signals)
#	Line 1289 \| Line 1502 \| void EnableInterrupt(void)
1502		* USR2 handler
1503		*/
1504
1505	<	#if EMULATED_PPC
1506	<	static void sigusr2_handler(int sig)
1294	<	{
1295	<	#if ASYNC_IRQ
1296	<	extern void HandleInterrupt(void);
1297	<	HandleInterrupt();
1298	<	#endif
1299	<	}
1300	<	#else
1301	<	static void sigusr2_handler(int sig, sigcontext_struct *sc)
1505	>	#if !EMULATED_PPC
1506	>	static void sigusr2_handler(int sig, siginfo_t sip, void scp)
1507		{
1508	<	pt_regs *r = sc->regs;
1508	>	machine_regs *r = MACHINE_REGISTERS(scp);
1509
1510		// Do nothing if interrupts are disabled
1511		if ((int32 )XLM_IRQ_NEST > 0)
#	Line 1314 \| Line 1519 \| static void sigusr2_handler(int sig, sig
1519		case MODE_68K:
1520		// 68k emulator active, trigger 68k interrupt level 1
1521		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1522	<	r->ccr \|= ntohl(kernel_data->v[0x674 >> 2]);
1522	>	r->cr() \|= ntohl(kernel_data->v[0x674 >> 2]);
1523		break;
1524
1525		#if INTERRUPTS_IN_NATIVE_MODE
1526		case MODE_NATIVE:
1527		// 68k emulator inactive, in nanokernel?
1528	<	if (r->gpr[1] != KernelDataAddr) {
1528	>	if (r->gpr(1) != KernelDataAddr) {
1529	>
1530	>	// Set extra stack for nested interrupts
1531	>	sig_stack_acquire();
1532	>
1533		// Prepare for 68k interrupt level 1
1534		WriteMacInt16(ntohl(kernel_data->v[0x67c >> 2]), 1);
1535		WriteMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc, ReadMacInt32(ntohl(kernel_data->v[0x658 >> 2]) + 0xdc) \| ntohl(kernel_data->v[0x674 >> 2]));
1536
1537		// Execute nanokernel interrupt routine (this will activate the 68k emulator)
1538	<	atomic_add((int32 *)XLM_IRQ_NEST, 1);
1538	>	DisableInterrupt();
1539		if (ROMType == ROMTYPE_NEWWORLD)
1540		ppc_interrupt(ROM_BASE + 0x312b1c, KernelDataAddr);
1541		else
1542		ppc_interrupt(ROM_BASE + 0x312a3c, KernelDataAddr);
1543	+
1544	+	// Reset normal signal stack
1545	+	sig_stack_release();
1546		}
1547		break;
1548		#endif
#	Line 1341 \| Line 1553 \| static void sigusr2_handler(int sig, sig
1553		if ((ReadMacInt32(XLM_68K_R25) & 7) == 0) {
1554
1555		// Set extra stack for SIGSEGV handler
1556	<	struct sigaltstack new_stack;
1345	<	new_stack.ss_sp = extra_stack;
1346	<	new_stack.ss_flags = 0;
1347	<	new_stack.ss_size = SIG_STACK_SIZE;
1348	<	sigaltstack(&new_stack, NULL);
1556	>	sig_stack_acquire();
1557		#if 1
1558		// Execute full 68k interrupt routine
1559		M68kRegisters r;
#	Line 1367 \| Line 1575 \| static void sigusr2_handler(int sig, sig
1575		if (InterruptFlags & INTFLAG_VIA) {
1576		ClearInterruptFlag(INTFLAG_VIA);
1577		ADBInterrupt();
1578	<	ExecutePPC(VideoVBL);
1578	>	ExecuteNative(NATIVE_VIDEO_VBL);
1579		}
1580		}
1581		#endif
1582		// Reset normal signal stack
1583	<	new_stack.ss_sp = sig_stack;
1376	<	new_stack.ss_flags = 0;
1377	<	new_stack.ss_size = SIG_STACK_SIZE;
1378	<	sigaltstack(&new_stack, NULL);
1583	>	sig_stack_release();
1584		}
1585		break;
1586		#endif
#	Line 1389 \| Line 1594 \| static void sigusr2_handler(int sig, sig
1594		*/
1595
1596		#if !EMULATED_PPC
1597	<	static void sigsegv_handler(int sig, sigcontext_struct *sc)
1597	>	static void sigsegv_handler(int sig, siginfo_t sip, void scp)
1598		{
1599	<	pt_regs *r = sc->regs;
1599	>	machine_regs *r = MACHINE_REGISTERS(scp);
1600
1601		// Get effective address
1602	<	uint32 addr = r->dar;
1602	>	uint32 addr = r->dar();
1603
1604		#if ENABLE_VOSF
1605		// Handle screen fault.
1606		extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
1607	<	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->nip))
1607	>	if (Screen_fault_handler((sigsegv_address_t)addr, (sigsegv_address_t)r->pc()))
1608		return;
1609		#endif
1610
1611		num_segv++;
1612
1613	<	// Fault in Mac ROM or RAM?
1614	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) \|\| (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1613	>	// Fault in Mac ROM or RAM or DR Cache?
1614	>	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));
1615		if (mac_fault) {
1616
1617		// "VM settings" during MacOS 8 installation
1618	<	if (r->nip == ROM_BASE + 0x488160 && r->gpr[20] == 0xf8000000) {
1619	<	r->nip += 4;
1620	<	r->gpr[8] = 0;
1618	>	if (r->pc() == ROM_BASE + 0x488160 && r->gpr(20) == 0xf8000000) {
1619	>	r->pc() += 4;
1620	>	r->gpr(8) = 0;
1621		return;
1622
1623		// MacOS 8.5 installation
1624	<	} else if (r->nip == ROM_BASE + 0x488140 && r->gpr[16] == 0xf8000000) {
1625	<	r->nip += 4;
1626	<	r->gpr[8] = 0;
1624	>	} else if (r->pc() == ROM_BASE + 0x488140 && r->gpr(16) == 0xf8000000) {
1625	>	r->pc() += 4;
1626	>	r->gpr(8) = 0;
1627		return;
1628
1629		// MacOS 8 serial drivers on startup
1630	<	} else if (r->nip == ROM_BASE + 0x48e080 && (r->gpr[8] == 0xf3012002 \|\| r->gpr[8] == 0xf3012000)) {
1631	<	r->nip += 4;
1632	<	r->gpr[8] = 0;
1630	>	} else if (r->pc() == ROM_BASE + 0x48e080 && (r->gpr(8) == 0xf3012002 \|\| r->gpr(8) == 0xf3012000)) {
1631	>	r->pc() += 4;
1632	>	r->gpr(8) = 0;
1633		return;
1634
1635		// MacOS 8.1 serial drivers on startup
1636	<	} else if (r->nip == ROM_BASE + 0x48c5e0 && (r->gpr[20] == 0xf3012002 \|\| r->gpr[20] == 0xf3012000)) {
1637	<	r->nip += 4;
1636	>	} else if (r->pc() == ROM_BASE + 0x48c5e0 && (r->gpr(20) == 0xf3012002 \|\| r->gpr(20) == 0xf3012000)) {
1637	>	r->pc() += 4;
1638		return;
1639	<	} else if (r->nip == ROM_BASE + 0x4a10a0 && (r->gpr[20] == 0xf3012002 \|\| r->gpr[20] == 0xf3012000)) {
1640	<	r->nip += 4;
1639	>	} else if (r->pc() == ROM_BASE + 0x4a10a0 && (r->gpr(20) == 0xf3012002 \|\| r->gpr(20) == 0xf3012000)) {
1640	>	r->pc() += 4;
1641	>	return;
1642	>
1643	>	// MacOS 8.6 serial drivers on startup (with DR Cache and OldWorld ROM)
1644	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(16) == 0xf3012002 \|\| r->gpr(16) == 0xf3012000)) {
1645	>	r->pc() += 4;
1646	>	return;
1647	>	} else if ((r->pc() - DR_CACHE_BASE) < DR_CACHE_SIZE && (r->gpr(20) == 0xf3012002 \|\| r->gpr(20) == 0xf3012000)) {
1648	>	r->pc() += 4;
1649		return;
1650		}
1651
1652		// Get opcode and divide into fields
1653	<	uint32 opcode = ((uint32 )r->nip);
1653	>	uint32 opcode = ((uint32 )r->pc());
1654		uint32 primop = opcode >> 26;
1655		uint32 exop = (opcode >> 1) & 0x3ff;
1656		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1526 \| Line 1739 \| static void sigsegv_handler(int sig, sig
1739		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_NORM; break;
1740		case 45: // sthu
1741		transfer_type = TYPE_STORE; transfer_size = SIZE_HALFWORD; addr_mode = MODE_U; break;
1742	+	#if EMULATE_UNALIGNED_LOADSTORE_MULTIPLE
1743	+	case 46: // lmw
1744	+	if ((addr % 4) != 0) {
1745	+	uint32 ea = addr;
1746	+	D(bug("WARNING: unaligned lmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1747	+	for (int i = rd; i <= 31; i++) {
1748	+	r->gpr(i) = ReadMacInt32(ea);
1749	+	ea += 4;
1750	+	}
1751	+	r->pc() += 4;
1752	+	goto rti;
1753	+	}
1754	+	break;
1755	+	case 47: // stmw
1756	+	if ((addr % 4) != 0) {
1757	+	uint32 ea = addr;
1758	+	D(bug("WARNING: unaligned stmw to EA=%08x from IP=%08x\n", ea, r->pc()));
1759	+	for (int i = rd; i <= 31; i++) {
1760	+	WriteMacInt32(ea, r->gpr(i));
1761	+	ea += 4;
1762	+	}
1763	+	r->pc() += 4;
1764	+	goto rti;
1765	+	}
1766	+	break;
1767	+	#endif
1768		}
1769
1770	<	// Ignore ROM writes
1771	<	if (transfer_type == TYPE_STORE && addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
1772	<	// 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));
1770	>	// Ignore ROM writes (including to the zero page, which is read-only)
1771	>	if (transfer_type == TYPE_STORE &&
1772	>	((addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) \|\|
1773	>	(addr >= SheepMem::ZeroPage() && addr < SheepMem::ZeroPage() + SheepMem::PageSize()))) {
1774	>	// 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()));
1775		if (addr_mode == MODE_U \|\| addr_mode == MODE_UX)
1776	<	r->gpr[ra] = addr;
1777	<	r->nip += 4;
1776	>	r->gpr(ra) = addr;
1777	>	r->pc() += 4;
1778		goto rti;
1779		}
1780
1781		// Ignore illegal memory accesses?
1782		if (PrefsFindBool("ignoresegv")) {
1783		if (addr_mode == MODE_U \|\| addr_mode == MODE_UX)
1784	<	r->gpr[ra] = addr;
1784	>	r->gpr(ra) = addr;
1785		if (transfer_type == TYPE_LOAD)
1786	<	r->gpr[rd] = 0;
1787	<	r->nip += 4;
1786	>	r->gpr(rd) = 0;
1787	>	r->pc() += 4;
1788		goto rti;
1789		}
1790
#	Line 1551 \| Line 1792 \| static void sigsegv_handler(int sig, sig
1792		if (!PrefsFindBool("nogui")) {
1793		char str[256];
1794		if (transfer_type == TYPE_LOAD \|\| transfer_type == TYPE_STORE)
1795	<	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]);
1795	>	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));
1796		else
1797	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1797	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1798		ErrorAlert(str);
1799		QuitEmulator();
1800		return;
#	Line 1561 \| Line 1802 \| static void sigsegv_handler(int sig, sig
1802		}
1803
1804		// For all other errors, jump into debugger (sort of...)
1805	+	crash_reason = (sig == SIGBUS) ? "SIGBUS" : "SIGSEGV";
1806		if (!ready_for_signals) {
1807	<	printf("SIGSEGV\n");
1808	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1807	>	printf("%s\n");
1808	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1809		printf(
1810		" pc %08lx lr %08lx ctr %08lx msr %08lx\n"
1811		" xer %08lx cr %08lx \n"
#	Line 1575 \| Line 1817 \| static void sigsegv_handler(int sig, sig
1817		" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
1818		" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
1819		" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
1820	<	r->nip, r->link, r->ctr, r->msr,
1821	<	r->xer, r->ccr,
1822	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1823	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1824	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1825	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1826	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1827	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1828	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1829	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1820	>	crash_reason,
1821	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1822	>	r->xer(), r->cr(),
1823	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1824	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1825	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1826	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1827	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1828	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1829	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1830	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1831		exit(1);
1832		QuitEmulator();
1833		return;
1834		} else {
1835		// We crashed. Save registers, tell tick thread and loop forever
1836	<	sigsegv_regs = (sigregs )r;
1836	>	build_sigregs(&sigsegv_regs, r);
1837		emul_thread_fatal = true;
1838		for (;;) ;
1839		}
#	Line 1602 \| Line 1845 \| rti:;
1845		* SIGILL handler
1846		*/
1847
1848	<	static void sigill_handler(int sig, sigcontext_struct *sc)
1848	>	static void sigill_handler(int sig, siginfo_t sip, void scp)
1849		{
1850	<	pt_regs *r = sc->regs;
1850	>	machine_regs *r = MACHINE_REGISTERS(scp);
1851		char str[256];
1852
1853		// Fault in Mac ROM or RAM?
1854	<	bool mac_fault = (r->nip >= ROM_BASE) && (r->nip < (ROM_BASE + ROM_AREA_SIZE)) \|\| (r->nip >= RAMBase) && (r->nip < (RAMBase + RAMSize));
1854	>	bool mac_fault = (r->pc() >= ROM_BASE) && (r->pc() < (ROM_BASE + ROM_AREA_SIZE)) \|\| (r->pc() >= RAMBase) && (r->pc() < (RAMBase + RAMSize));
1855		if (mac_fault) {
1856
1857		// Get opcode and divide into fields
1858	<	uint32 opcode = ((uint32 )r->nip);
1858	>	uint32 opcode = ((uint32 )r->pc());
1859		uint32 primop = opcode >> 26;
1860		uint32 exop = (opcode >> 1) & 0x3ff;
1861		uint32 ra = (opcode >> 16) & 0x1f;
#	Line 1623 \| Line 1866 \| static void sigill_handler(int sig, sigc
1866		switch (primop) {
1867		case 9: // POWER instructions
1868		case 22:
1869	<	power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->nip, r->gpr[1], opcode);
1869	>	power_inst: sprintf(str, GetString(STR_POWER_INSTRUCTION_ERR), r->pc(), r->gpr(1), opcode);
1870		ErrorAlert(str);
1871		QuitEmulator();
1872		return;
#	Line 1631 \| Line 1874 \| power_inst: sprintf(str, GetString(STR_
1874		case 31:
1875		switch (exop) {
1876		case 83: // mfmsr
1877	<	r->gpr[rd] = 0xf072;
1878	<	r->nip += 4;
1877	>	r->gpr(rd) = 0xf072;
1878	>	r->pc() += 4;
1879		goto rti;
1880
1881		case 210: // mtsr
1882		case 242: // mtsrin
1883		case 306: // tlbie
1884	<	r->nip += 4;
1884	>	r->pc() += 4;
1885		goto rti;
1886
1887		case 339: { // mfspr
#	Line 1654 \| Line 1897 \| power_inst: sprintf(str, GetString(STR_
1897		case 957: // PMC3
1898		case 958: // PMC4
1899		case 959: // SDA
1900	<	r->nip += 4;
1900	>	r->pc() += 4;
1901		goto rti;
1902		case 25: // SDR1
1903	<	r->gpr[rd] = 0xdead001f;
1904	<	r->nip += 4;
1903	>	r->gpr(rd) = 0xdead001f;
1904	>	r->pc() += 4;
1905		goto rti;
1906		case 287: // PVR
1907	<	r->gpr[rd] = PVR;
1908	<	r->nip += 4;
1907	>	r->gpr(rd) = PVR;
1908	>	r->pc() += 4;
1909		goto rti;
1910		}
1911		break;
#	Line 1698 \| Line 1941 \| power_inst: sprintf(str, GetString(STR_
1941		case 957: // PMC3
1942		case 958: // PMC4
1943		case 959: // SDA
1944	<	r->nip += 4;
1944	>	r->pc() += 4;
1945		goto rti;
1946		}
1947		break;
#	Line 1717 \| Line 1960 \| power_inst: sprintf(str, GetString(STR_
1960
1961		// In GUI mode, show error alert
1962		if (!PrefsFindBool("nogui")) {
1963	<	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->nip, r->gpr[24], r->gpr[1], opcode);
1963	>	sprintf(str, GetString(STR_UNKNOWN_SEGV_ERR), r->pc(), r->gpr(24), r->gpr(1), opcode);
1964		ErrorAlert(str);
1965		QuitEmulator();
1966		return;
#	Line 1725 \| Line 1968 \| power_inst: sprintf(str, GetString(STR_
1968		}
1969
1970		// For all other errors, jump into debugger (sort of...)
1971	+	crash_reason = "SIGILL";
1972		if (!ready_for_signals) {
1973	<	printf("SIGILL\n");
1974	<	printf(" sigcontext %p, pt_regs %p\n", sc, r);
1973	>	printf("%s\n");
1974	>	printf(" sigcontext %p, machine_regs %p\n", scp, r);
1975		printf(
1976		" pc %08lx lr %08lx ctr %08lx msr %08lx\n"
1977		" xer %08lx cr %08lx \n"
#	Line 1739 \| Line 1983 \| power_inst: sprintf(str, GetString(STR_
1983		" r20 %08lx r21 %08lx r22 %08lx r23 %08lx\n"
1984		" r24 %08lx r25 %08lx r26 %08lx r27 %08lx\n"
1985		" r28 %08lx r29 %08lx r30 %08lx r31 %08lx\n",
1986	<	r->nip, r->link, r->ctr, r->msr,
1987	<	r->xer, r->ccr,
1988	<	r->gpr[0], r->gpr[1], r->gpr[2], r->gpr[3],
1989	<	r->gpr[4], r->gpr[5], r->gpr[6], r->gpr[7],
1990	<	r->gpr[8], r->gpr[9], r->gpr[10], r->gpr[11],
1991	<	r->gpr[12], r->gpr[13], r->gpr[14], r->gpr[15],
1992	<	r->gpr[16], r->gpr[17], r->gpr[18], r->gpr[19],
1993	<	r->gpr[20], r->gpr[21], r->gpr[22], r->gpr[23],
1994	<	r->gpr[24], r->gpr[25], r->gpr[26], r->gpr[27],
1995	<	r->gpr[28], r->gpr[29], r->gpr[30], r->gpr[31]);
1986	>	crash_reason,
1987	>	r->pc(), r->lr(), r->ctr(), r->msr(),
1988	>	r->xer(), r->cr(),
1989	>	r->gpr(0), r->gpr(1), r->gpr(2), r->gpr(3),
1990	>	r->gpr(4), r->gpr(5), r->gpr(6), r->gpr(7),
1991	>	r->gpr(8), r->gpr(9), r->gpr(10), r->gpr(11),
1992	>	r->gpr(12), r->gpr(13), r->gpr(14), r->gpr(15),
1993	>	r->gpr(16), r->gpr(17), r->gpr(18), r->gpr(19),
1994	>	r->gpr(20), r->gpr(21), r->gpr(22), r->gpr(23),
1995	>	r->gpr(24), r->gpr(25), r->gpr(26), r->gpr(27),
1996	>	r->gpr(28), r->gpr(29), r->gpr(30), r->gpr(31));
1997		exit(1);
1998		QuitEmulator();
1999		return;
2000		} else {
2001		// We crashed. Save registers, tell tick thread and loop forever
2002	<	sigsegv_regs = (sigregs )r;
2002	>	build_sigregs(&sigsegv_regs, r);
2003		emul_thread_fatal = true;
2004		for (;;) ;
2005		}
#	Line 1764 \| Line 2009 \| rti:;
2009
2010
2011		/*
2012	+	* Helpers to share 32-bit addressable data with MacOS
2013	+	*/
2014	+
2015	+	bool SheepMem::Init(void)
2016	+	{
2017	+	// Size of a native page
2018	+	page_size = getpagesize();
2019	+
2020	+	// Allocate SheepShaver globals
2021	+	if (vm_acquire_fixed((char *)base, size) < 0)
2022	+	return false;
2023	+
2024	+	// Allocate page with all bits set to 0
2025	+	zero_page = base + size;
2026	+	if (vm_acquire_fixed((char *)zero_page, page_size) < 0)
2027	+	return false;
2028	+	memset((char *)zero_page, 0, page_size);
2029	+	if (vm_protect((char *)zero_page, page_size, VM_PAGE_READ) < 0)
2030	+	return false;
2031	+
2032	+	#if EMULATED_PPC
2033	+	// Allocate alternate stack for PowerPC interrupt routine
2034	+	sig_stack = zero_page + page_size;
2035	+	if (vm_acquire_fixed((char *)sig_stack, SIG_STACK_SIZE) < 0)
2036	+	return false;
2037	+	#endif
2038	+
2039	+	top = base + size;
2040	+	return true;
2041	+	}
2042	+
2043	+	void SheepMem::Exit(void)
2044	+	{
2045	+	if (top) {
2046	+	// Delete SheepShaver globals
2047	+	vm_release((void *)base, size);
2048	+
2049	+	// Delete zero page
2050	+	vm_release((void *)zero_page, page_size);
2051	+
2052	+	#if EMULATED_PPC
2053	+	// Delete alternate stack for PowerPC interrupt routine
2054	+	vm_release((void *)sig_stack, SIG_STACK_SIZE);
2055	+	#endif
2056	+	}
2057	+	}
2058	+
2059	+
2060	+	/*
2061		* Display alert
2062		*/
2063

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Comparing SheepShaver/src/Unix/main_unix.cpp (file contents): Revision 1.13 by gbeauche, 2003-11-03T21:28:25Z vs. Revision 1.38 by gbeauche, 2004-05-31T10:55:42Z

Diff Legend

Comparing SheepShaver/src/Unix/main_unix.cpp (file contents):
Revision 1.13 by gbeauche, 2003-11-03T21:28:25Z vs.
Revision 1.38 by gbeauche, 2004-05-31T10:55:42Z