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root/cebix/SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp

Comparing SheepShaver/src/kpx_cpu/sheepshaver_glue.cpp (file contents):
Revision 1.2 by gbeauche, 2003-09-28T21:27:34Z vs.
Revision 1.28 by gbeauche, 2004-02-16T15:34:55Z

#	Line 1 | Line 1
1		/*
2		*  sheepshaver_glue.cpp - Glue Kheperix CPU to SheepShaver CPU engine interface
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 21 | Line 21
21		#include "sysdeps.h"
22		#include "cpu_emulation.h"
23		#include "main.h"
24	+	#include "prefs.h"
25		#include "xlowmem.h"
26		#include "emul_op.h"
27		#include "rom_patches.h"
28		#include "macos_util.h"
29		#include "block-alloc.hpp"
30		#include "sigsegv.h"
30	–	#include "spcflags.h"
31		#include "cpu/ppc/ppc-cpu.hpp"
32		#include "cpu/ppc/ppc-operations.hpp"
33	+	#include "cpu/ppc/ppc-instructions.hpp"
34	+	#include "thunks.h"
35
36		// Used for NativeOp trampolines
37		#include "video.h"
38		#include "name_registry.h"
39		#include "serial.h"
40	+	#include "ether.h"
41
42		#include <stdio.h>
43
#	Line 43 | Line 46
46		#include "mon_disass.h"
47		#endif
48
49	<	#define DEBUG 1
49	>	#define DEBUG 0
50		#include "debug.h"
51
52	+	// Emulation time statistics
53	+	#define EMUL_TIME_STATS 1
54	+
55	+	#if EMUL_TIME_STATS
56	+	static clock_t emul_start_time;
57	+	static uint32 interrupt_count = 0;
58	+	static clock_t interrupt_time = 0;
59	+	static uint32 exec68k_count = 0;
60	+	static clock_t exec68k_time = 0;
61	+	static uint32 native_exec_count = 0;
62	+	static clock_t native_exec_time = 0;
63	+	static uint32 macos_exec_count = 0;
64	+	static clock_t macos_exec_time = 0;
65	+	#endif
66	+
67		static void enter_mon(void)
68		{
69		// Start up mon in real-mode
#	Line 55 | Line 73 | static void enter_mon(void)
73		#endif
74		}
75
76	+	// From main_*.cpp
77	+	extern uintptr SignalStackBase();
78	+
79	+	// From rsrc_patches.cpp
80	+	extern "C" void check_load_invoc(uint32 type, int16 id, uint32 h);
81	+
82	+	// PowerPC EmulOp to exit from emulation looop
83	+	const uint32 POWERPC_EXEC_RETURN = POWERPC_EMUL_OP | 1;
84	+
85		// Enable multicore (main/interrupts) cpu emulation?
86	<	#define MULTICORE_CPU 0
86	>	#define MULTICORE_CPU (ASYNC_IRQ ? 1 : 0)
87
88		// Enable Execute68k() safety checks?
89		#define SAFE_EXEC_68K 1
#	Line 70 | Line 97 | static void enter_mon(void)
97		// Interrupts in native mode?
98		#define INTERRUPTS_IN_NATIVE_MODE 1
99
100	<	// 68k Emulator Data
101	<	struct EmulatorData {
75	<	uint32  v[0x400];
76	<	};
100	>	// Pointer to Kernel Data
101	>	static KernelData * const kernel_data = (KernelData *)KERNEL_DATA_BASE;
102
103	<	// Kernel Data
104	<	struct KernelData {
80	<	uint32  v[0x400];
81	<	EmulatorData ed;
82	<	};
103	>	// SIGSEGV handler
104	>	static sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
105
106	<	// Pointer to Kernel Data
107	<	static KernelData * const kernel_data = (KernelData *)0x68ffe000;
106	>	// JIT Compiler enabled?
107	>	static inline bool enable_jit_p()
108	>	{
109	>	return PrefsFindBool("jit");
110	>	}
111
112
113		/**
114		*              PowerPC emulator glue with special 'sheep' opcodes
115		**/
116
117	<	struct sheepshaver_exec_return { };
117	>	enum {
118	>	PPC_I(SHEEP) = PPC_I(MAX),
119	>	PPC_I(SHEEP_MAX)
120	>	};
121
122		class sheepshaver_cpu
123		: public powerpc_cpu
#	Line 99 | Line 127 | class sheepshaver_cpu
127
128		public:
129
130	<	sheepshaver_cpu()
131	<	: powerpc_cpu()
104	<	{ init_decoder(); }
130	>	// Constructor
131	>	sheepshaver_cpu();
132
133	<	// Condition Register accessors
133	>	// CR & XER accessors
134		uint32 get_cr() const           { return cr().get(); }
135		void set_cr(uint32 v)           { cr().set(v); }
136	+	uint32 get_xer() const          { return xer().get(); }
137	+	void set_xer(uint32 v)          { xer().set(v); }
138
139	<	// Execution loop
140	<	void execute(uint32 pc);
139	>	// Execute EMUL_OP routine
140	>	void execute_emul_op(uint32 emul_op);
141
142		// Execute 68k routine
143		void execute_68k(uint32 entry, M68kRegisters *r);
#	Line 119 | Line 148 | public:
148		// Execute MacOS/PPC code
149		uint32 execute_macos_code(uint32 tvect, int nargs, uint32 const *args);
150
151	+	// Compile one instruction
152	+	virtual bool compile1(codegen_context_t & cg_context);
153	+
154		// Resource manager thunk
155		void get_resource(uint32 old_get_resource);
156
157		// Handle MacOS interrupt
158	<	void interrupt(uint32 entry, sheepshaver_cpu *cpu);
159	<
128	<	// spcflags for interrupts handling
129	<	static uint32 spcflags;
158	>	void interrupt(uint32 entry);
159	>	void handle_interrupt();
160
161		// Lazy memory allocator (one item at a time)
162		void *operator new(size_t size)
#	Line 136 | Line 166 | public:
166		// FIXME: really make surre array allocation fail at link time?
167		void *operator new[](size_t);
168		void operator delete[](void *p);
169	+
170	+	// Make sure the SIGSEGV handler can access CPU registers
171	+	friend sigsegv_return_t sigsegv_handler(sigsegv_address_t, sigsegv_address_t);
172		};
173
174	<	uint32 sheepshaver_cpu::spcflags = 0;
175	<	lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
174	>	// FIXME: this specialization doesn't work with GCC
175	>	// template<> lazy_allocator< sheepshaver_cpu > allocator_helper< sheepshaver_cpu, lazy_allocator >::allocator;
176	>	template< class data_type, template< class > class allocator_type >
177	>	allocator_type< data_type > allocator_helper< data_type, allocator_type >::allocator;
178
179	<	void sheepshaver_cpu::init_decoder()
179	>	sheepshaver_cpu::sheepshaver_cpu()
180	>	: powerpc_cpu(enable_jit_p())
181		{
182	<	#ifndef PPC_NO_STATIC_II_INDEX_TABLE
183	<	static bool initialized = false;
148	<	if (initialized)
149	<	return;
150	<	initialized = true;
151	<	#endif
182	>	init_decoder();
183	>	}
184
185	+	void sheepshaver_cpu::init_decoder()
186	+	{
187		static const instr_info_t sheep_ii_table[] = {
188		{ "sheep",
189	<	(execute_fn)&sheepshaver_cpu::execute_sheep,
189	>	(execute_pmf)&sheepshaver_cpu::execute_sheep,
190		NULL,
191	<	D_form, 6, 0, CFLOW_TRAP
191	>	PPC_I(SHEEP),
192	>	D_form, 6, 0, CFLOW_JUMP | CFLOW_TRAP
193		}
194		};
195
#	Line 181 | Line 216 | typedef bit_field< 20, 20 > FN_field;
216		typedef bit_field< 21, 25 > NATIVE_OP_field;
217		typedef bit_field< 26, 31 > EMUL_OP_field;
218
219	+	// Execute EMUL_OP routine
220	+	void sheepshaver_cpu::execute_emul_op(uint32 emul_op)
221	+	{
222	+	M68kRegisters r68;
223	+	WriteMacInt32(XLM_68K_R25, gpr(25));
224	+	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
225	+	for (int i = 0; i < 8; i++)
226	+	r68.d[i] = gpr(8 + i);
227	+	for (int i = 0; i < 7; i++)
228	+	r68.a[i] = gpr(16 + i);
229	+	r68.a[7] = gpr(1);
230	+	uint32 saved_cr = get_cr() & CR_field<2>::mask();
231	+	uint32 saved_xer = get_xer();
232	+	EmulOp(&r68, gpr(24), emul_op);
233	+	set_cr(saved_cr);
234	+	set_xer(saved_xer);
235	+	for (int i = 0; i < 8; i++)
236	+	gpr(8 + i) = r68.d[i];
237	+	for (int i = 0; i < 7; i++)
238	+	gpr(16 + i) = r68.a[i];
239	+	gpr(1) = r68.a[7];
240	+	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
241	+	}
242	+
243		// Execute SheepShaver instruction
244		void sheepshaver_cpu::execute_sheep(uint32 opcode)
245		{
#	Line 191 | Line 250 | void sheepshaver_cpu::execute_sheep(uint
250		case 0:         // EMUL_RETURN
251		QuitEmulator();
252		break;
253	<
253	>
254		case 1:         // EXEC_RETURN
255	<	throw sheepshaver_exec_return();
255	>	spcflags().set(SPCFLAG_CPU_EXEC_RETURN);
256		break;
257
258		case 2:         // EXEC_NATIVE
#	Line 204 | Line 263 | void sheepshaver_cpu::execute_sheep(uint
263		pc() += 4;
264		break;
265
266	<	default: {      // EMUL_OP
267	<	M68kRegisters r68;
209	<	WriteMacInt32(XLM_68K_R25, gpr(25));
210	<	WriteMacInt32(XLM_RUN_MODE, MODE_EMUL_OP);
211	<	for (int i = 0; i < 8; i++)
212	<	r68.d[i] = gpr(8 + i);
213	<	for (int i = 0; i < 7; i++)
214	<	r68.a[i] = gpr(16 + i);
215	<	r68.a[7] = gpr(1);
216	<	EmulOp(&r68, gpr(24), EMUL_OP_field::extract(opcode) - 3);
217	<	for (int i = 0; i < 8; i++)
218	<	gpr(8 + i) = r68.d[i];
219	<	for (int i = 0; i < 7; i++)
220	<	gpr(16 + i) = r68.a[i];
221	<	gpr(1) = r68.a[7];
222	<	WriteMacInt32(XLM_RUN_MODE, MODE_68K);
266	>	default:        // EMUL_OP
267	>	execute_emul_op(EMUL_OP_field::extract(opcode) - 3);
268		pc() += 4;
269		break;
270		}
226	–	}
271		}
272
273	<	// Checks for pending interrupts
274	<	struct execute_nothing {
275	<	static inline void execute(powerpc_cpu *) { }
276	<	};
273	>	// Compile one instruction
274	>	bool sheepshaver_cpu::compile1(codegen_context_t & cg_context)
275	>	{
276	>	#if PPC_ENABLE_JIT
277	>	const instr_info_t *ii = cg_context.instr_info;
278	>	if (ii->mnemo != PPC_I(SHEEP))
279	>	return false;
280	>
281	>	bool compiled = false;
282	>	powerpc_dyngen & dg = cg_context.codegen;
283	>	uint32 opcode = cg_context.opcode;
284
285	<	static void HandleInterrupt(void);
285	>	switch (opcode & 0x3f) {
286	>	case 0:         // EMUL_RETURN
287	>	dg.gen_invoke(QuitEmulator);
288	>	compiled = true;
289	>	break;
290
291	<	struct execute_spcflags_check {
292	<	static inline void execute(powerpc_cpu *cpu) {
293	<	if (SPCFLAGS_TEST(SPCFLAG_ALL_BUT_EXEC_RETURN)) {
294	<	if (SPCFLAGS_TEST( SPCFLAG_ENTER_MON )) {
295	<	SPCFLAGS_CLEAR( SPCFLAG_ENTER_MON );
296	<	enter_mon();
297	<	}
298	<	if (SPCFLAGS_TEST( SPCFLAG_DOINT )) {
299	<	SPCFLAGS_CLEAR( SPCFLAG_DOINT );
300	<	HandleInterrupt();
301	<	}
302	<	if (SPCFLAGS_TEST( SPCFLAG_INT )) {
303	<	SPCFLAGS_CLEAR( SPCFLAG_INT );
304	<	SPCFLAGS_SET( SPCFLAG_DOINT );
291	>	case 1:         // EXEC_RETURN
292	>	dg.gen_spcflags_set(SPCFLAG_CPU_EXEC_RETURN);
293	>	compiled = true;
294	>	break;
295	>
296	>	case 2: {       // EXEC_NATIVE
297	>	uint32 selector = NATIVE_OP_field::extract(opcode);
298	>	switch (selector) {
299	>	case NATIVE_PATCH_NAME_REGISTRY:
300	>	dg.gen_invoke(DoPatchNameRegistry);
301	>	compiled = true;
302	>	break;
303	>	case NATIVE_VIDEO_INSTALL_ACCEL:
304	>	dg.gen_invoke(VideoInstallAccel);
305	>	compiled = true;
306	>	break;
307	>	case NATIVE_VIDEO_VBL:
308	>	dg.gen_invoke(VideoVBL);
309	>	compiled = true;
310	>	break;
311	>	case NATIVE_GET_RESOURCE:
312	>	case NATIVE_GET_1_RESOURCE:
313	>	case NATIVE_GET_IND_RESOURCE:
314	>	case NATIVE_GET_1_IND_RESOURCE:
315	>	case NATIVE_R_GET_RESOURCE: {
316	>	static const uint32 get_resource_ptr[] = {
317	>	XLM_GET_RESOURCE,
318	>	XLM_GET_1_RESOURCE,
319	>	XLM_GET_IND_RESOURCE,
320	>	XLM_GET_1_IND_RESOURCE,
321	>	XLM_R_GET_RESOURCE
322	>	};
323	>	uint32 old_get_resource = ReadMacInt32(get_resource_ptr[selector - NATIVE_GET_RESOURCE]);
324	>	typedef void (*func_t)(dyngen_cpu_base, uint32);
325	>	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::get_resource).ptr();
326	>	dg.gen_invoke_CPU_im(func, old_get_resource);
327	>	compiled = true;
328	>	break;
329	>	}
330	>	case NATIVE_DISABLE_INTERRUPT:
331	>	dg.gen_invoke(DisableInterrupt);
332	>	compiled = true;
333	>	break;
334	>	case NATIVE_ENABLE_INTERRUPT:
335	>	dg.gen_invoke(EnableInterrupt);
336	>	compiled = true;
337	>	break;
338	>	case NATIVE_CHECK_LOAD_INVOC:
339	>	dg.gen_load_T0_GPR(3);
340	>	dg.gen_load_T1_GPR(4);
341	>	dg.gen_se_16_32_T1();
342	>	dg.gen_load_T2_GPR(5);
343	>	dg.gen_invoke_T0_T1_T2((void (*)(uint32, uint32, uint32))check_load_invoc);
344	>	compiled = true;
345	>	break;
346	>	}
347	>	if (FN_field::test(opcode)) {
348	>	if (compiled) {
349	>	dg.gen_load_A0_LR();
350	>	dg.gen_set_PC_A0();
351		}
352	+	cg_context.done_compile = true;
353		}
354	+	else
355	+	cg_context.done_compile = false;
356	+	break;
357		}
253	–	};
358
359	<	// Execution loop
360	<	void sheepshaver_cpu::execute(uint32 entry)
361	<	{
362	<	try {
363	<	pc() = entry;
364	<	powerpc_cpu::do_execute<execute_nothing, execute_spcflags_check>();
359	>	default: {      // EMUL_OP
360	>	typedef void (*func_t)(dyngen_cpu_base, uint32);
361	>	func_t func = (func_t)nv_mem_fun(&sheepshaver_cpu::execute_emul_op).ptr();
362	>	dg.gen_invoke_CPU_im(func, EMUL_OP_field::extract(opcode) - 3);
363	>	cg_context.done_compile = false;
364	>	compiled = true;
365	>	break;
366		}
262	–	catch (sheepshaver_exec_return const &) {
263	–	// Nothing, simply return
264	–	}
265	–	catch (...) {
266	–	printf("ERROR: execute() received an unknown exception!\n");
267	–	QuitEmulator();
367		}
368	+	return compiled;
369	+	#endif
370	+	return false;
371		}
372
373		// Handle MacOS interrupt
374	<	void sheepshaver_cpu::interrupt(uint32 entry, sheepshaver_cpu *cpu)
374	>	void sheepshaver_cpu::interrupt(uint32 entry)
375		{
376	<	#if MULTICORE_CPU
377	<	// Initialize stack pointer from previous CPU running
378	<	gpr(1) = cpu->gpr(1);
379	<	#else
376	>	#if EMUL_TIME_STATS
377	>	interrupt_count++;
378	>	const clock_t interrupt_start = clock();
379	>	#endif
380	>
381	>	#if !MULTICORE_CPU
382		// Save program counters and branch registers
383		uint32 saved_pc = pc();
384		uint32 saved_lr = lr();
385		uint32 saved_ctr= ctr();
386	+	uint32 saved_sp = gpr(1);
387		#endif
388
389	<	// Create stack frame
390	<	gpr(1) -= 64;
389	>	// Initialize stack pointer to SheepShaver alternate stack base
390	>	gpr(1) = SignalStackBase() - 64;
391
392		// Build trampoline to return from interrupt
393	<	uint32 trampoline[] = { POWERPC_EMUL_OP | 1 };
393	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
394
395		// Prepare registers for nanokernel interrupt routine
396	<	kernel_data->v[0x004 >> 2] = gpr(1);
397	<	kernel_data->v[0x018 >> 2] = gpr(6);
396	>	kernel_data->v[0x004 >> 2] = htonl(gpr(1));
397	>	kernel_data->v[0x018 >> 2] = htonl(gpr(6));
398
399	<	gpr(6) = kernel_data->v[0x65c >> 2];
399	>	gpr(6) = ntohl(kernel_data->v[0x65c >> 2]);
400		assert(gpr(6) != 0);
401		WriteMacInt32(gpr(6) + 0x13c, gpr(7));
402		WriteMacInt32(gpr(6) + 0x144, gpr(8));
#	Line 302 | Line 407 | void sheepshaver_cpu::interrupt(uint32 e
407		WriteMacInt32(gpr(6) + 0x16c, gpr(13));
408
409		gpr(1)  = KernelDataAddr;
410	<	gpr(7)  = kernel_data->v[0x660 >> 2];
410	>	gpr(7)  = ntohl(kernel_data->v[0x660 >> 2]);
411		gpr(8)  = 0;
412	<	gpr(10) = (uint32)trampoline;
413	<	gpr(12) = (uint32)trampoline;
414	<	gpr(13) = cr().get();
412	>	gpr(10) = trampoline.addr();
413	>	gpr(12) = trampoline.addr();
414	>	gpr(13) = get_cr();
415
416		// rlwimi. r7,r7,8,0,0
417		uint32 result = op_ppc_rlwimi::apply(gpr(7), 8, 0x80000000, gpr(7));
#	Line 314 | Line 419 | void sheepshaver_cpu::interrupt(uint32 e
419		gpr(7) = result;
420
421		gpr(11) = 0xf072; // MSR (SRR1)
422	<	cr().set((gpr(11) & 0x0fff0000) | (cr().get() & ~0x0fff0000));
422	>	cr().set((gpr(11) & 0x0fff0000) | (get_cr() & ~0x0fff0000));
423
424		// Enter nanokernel
425		execute(entry);
426
322	–	// Cleanup stack
323	–	gpr(1) += 64;
324	–
427		#if !MULTICORE_CPU
428		// Restore program counters and branch registers
429		pc() = saved_pc;
430		lr() = saved_lr;
431		ctr()= saved_ctr;
432	+	gpr(1) = saved_sp;
433	+	#endif
434	+
435	+	#if EMUL_TIME_STATS
436	+	interrupt_time += (clock() - interrupt_start);
437		#endif
438		}
439
440		// Execute 68k routine
441		void sheepshaver_cpu::execute_68k(uint32 entry, M68kRegisters *r)
442		{
443	+	#if EMUL_TIME_STATS
444	+	exec68k_count++;
445	+	const clock_t exec68k_start = clock();
446	+	#endif
447	+
448		#if SAFE_EXEC_68K
449		if (ReadMacInt32(XLM_RUN_MODE) != MODE_EMUL_OP)
450		printf("FATAL: Execute68k() not called from EMUL_OP mode\n");
#	Line 342 | Line 454 | void sheepshaver_cpu::execute_68k(uint32
454		uint32 saved_pc = pc();
455		uint32 saved_lr = lr();
456		uint32 saved_ctr= ctr();
457	+	uint32 saved_cr = get_cr();
458
459		// Create MacOS stack frame
460	+	// FIXME: make sure MacOS doesn't expect PPC registers to live on top
461		uint32 sp = gpr(1);
462	<	gpr(1) -= 56 + 19*4 + 18*8;
462	>	gpr(1) -= 56;
463		WriteMacInt32(gpr(1), sp);
464
465		// Save PowerPC registers
466	<	memcpy(Mac2HostAddr(gpr(1)+56), &gpr(13), sizeof(uint32)*(32-13));
466	>	uint32 saved_GPRs[19];
467	>	memcpy(&saved_GPRs[0], &gpr(13), sizeof(uint32)*(32-13));
468		#if SAVE_FP_EXEC_68K
469	<	memcpy(Mac2HostAddr(gpr(1)+56+19*4), &fpr(14), sizeof(double)*(32-14));
469	>	double saved_FPRs[18];
470	>	memcpy(&saved_FPRs[0], &fpr(14), sizeof(double)*(32-14));
471		#endif
472
473		// Setup registers for 68k emulator
#	Line 365 | Line 481 | void sheepshaver_cpu::execute_68k(uint32
481		gpr(25) = ReadMacInt32(XLM_68K_R25);            // MSB of SR
482		gpr(26) = 0;
483		gpr(28) = 0;                                                            // VBR
484	<	gpr(29) = kernel_data->ed.v[0x74 >> 2];         // Pointer to opcode table
485	<	gpr(30) = kernel_data->ed.v[0x78 >> 2];         // Address of emulator
484	>	gpr(29) = ntohl(kernel_data->ed.v[0x74 >> 2]);          // Pointer to opcode table
485	>	gpr(30) = ntohl(kernel_data->ed.v[0x78 >> 2]);          // Address of emulator
486		gpr(31) = KernelDataAddr + 0x1000;
487
488		// Push return address (points to EXEC_RETURN opcode) on stack
#	Line 398 | Line 514 | void sheepshaver_cpu::execute_68k(uint32
514		r->a[i] = gpr(16 + i);
515
516		// Restore PowerPC registers
517	<	memcpy(&gpr(13), Mac2HostAddr(gpr(1)+56), sizeof(uint32)*(32-13));
517	>	memcpy(&gpr(13), &saved_GPRs[0], sizeof(uint32)*(32-13));
518		#if SAVE_FP_EXEC_68K
519	<	memcpy(&fpr(14), Mac2HostAddr(gpr(1)+56+19*4), sizeof(double)*(32-14));
519	>	memcpy(&fpr(14), &saved_FPRs[0], sizeof(double)*(32-14));
520		#endif
521
522		// Cleanup stack
523	<	gpr(1) += 56 + 19*4 + 18*8;
523	>	gpr(1) += 56;
524
525		// Restore program counters and branch registers
526		pc() = saved_pc;
527		lr() = saved_lr;
528		ctr()= saved_ctr;
529	+	set_cr(saved_cr);
530	+
531	+	#if EMUL_TIME_STATS
532	+	exec68k_time += (clock() - exec68k_start);
533	+	#endif
534		}
535
536		// Call MacOS PPC code
537		uint32 sheepshaver_cpu::execute_macos_code(uint32 tvect, int nargs, uint32 const *args)
538		{
539	+	#if EMUL_TIME_STATS
540	+	macos_exec_count++;
541	+	const clock_t macos_exec_start = clock();
542	+	#endif
543	+
544		// Save program counters and branch registers
545		uint32 saved_pc = pc();
546		uint32 saved_lr = lr();
547		uint32 saved_ctr= ctr();
548
549		// Build trampoline with EXEC_RETURN
550	<	uint32 trampoline[] = { POWERPC_EMUL_OP | 1 };
551	<	lr() = (uint32)trampoline;
550	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
551	>	lr() = trampoline.addr();
552
553		gpr(1) -= 64;                                                           // Create stack frame
554		uint32 proc = ReadMacInt32(tvect);                      // Get routine address
#	Line 453 | Line 579 | uint32 sheepshaver_cpu::execute_macos_co
579		lr() = saved_lr;
580		ctr()= saved_ctr;
581
582	+	#if EMUL_TIME_STATS
583	+	macos_exec_time += (clock() - macos_exec_start);
584	+	#endif
585	+
586		return retval;
587		}
588
#	Line 461 | Line 591 | inline void sheepshaver_cpu::execute_ppc
591		{
592		// Save branch registers
593		uint32 saved_lr = lr();
464	–	uint32 saved_ctr= ctr();
594
595	<	const uint32 trampoline[] = { POWERPC_EMUL_OP | 1 };
595	>	SheepVar32 trampoline = POWERPC_EXEC_RETURN;
596	>	WriteMacInt32(trampoline.addr(), POWERPC_EXEC_RETURN);
597	>	lr() = trampoline.addr();
598
468	–	lr() = (uint32)trampoline;
469	–	ctr()= entry;
599		execute(entry);
600
601		// Restore branch registers
602		lr() = saved_lr;
474	–	ctr()= saved_ctr;
603		}
604
605		// Resource Manager thunk
478	–	extern "C" void check_load_invoc(uint32 type, int16 id, uint16 **h);
479	–
606		inline void sheepshaver_cpu::get_resource(uint32 old_get_resource)
607		{
608		uint32 type = gpr(3);
#	Line 487 | Line 613 | inline void sheepshaver_cpu::get_resourc
613
614		// Call old routine
615		execute_ppc(old_get_resource);
490	–	uint16 **handle = (uint16 **)gpr(3);
616
617		// Call CheckLoad()
618	+	uint32 handle = gpr(3);
619		check_load_invoc(type, id, handle);
620	<	gpr(3) = (uint32)handle;
620	>	gpr(3) = handle;
621
622		// Cleanup stack
623		gpr(1) += 56;
#	Line 506 | Line 632 | static sheepshaver_cpu *main_cpu = NULL;
632		static sheepshaver_cpu *interrupt_cpu = NULL;   // CPU emulator to handle interrupts
633		static sheepshaver_cpu *current_cpu = NULL;             // Current CPU emulator context
634
635	+	void FlushCodeCache(uintptr start, uintptr end)
636	+	{
637	+	D(bug("FlushCodeCache(%08x, %08x)\n", start, end));
638	+	main_cpu->invalidate_cache_range(start, end);
639	+	#if MULTICORE_CPU
640	+	interrupt_cpu->invalidate_cache_range(start, end);
641	+	#endif
642	+	}
643	+
644		static inline void cpu_push(sheepshaver_cpu *new_cpu)
645		{
646		#if MULTICORE_CPU
#	Line 536 | Line 671 | static void dump_log(void)
671		*  Initialize CPU emulation
672		*/
673
674	<	static struct sigaction sigsegv_action;
540	<
541	<	#if defined(__powerpc__)
542	<	#include <sys/ucontext.h>
543	<	#endif
544	<
545	<	static void sigsegv_handler(int sig, siginfo_t *sip, void *scp)
674	>	static sigsegv_return_t sigsegv_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction)
675		{
547	–	const uintptr addr = (uintptr)sip->si_addr;
676		#if ENABLE_VOSF
677	<	// Handle screen fault.
678	<	extern bool Screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction);
679	<	if (Screen_fault_handler((sigsegv_address_t)addr, SIGSEGV_INVALID_PC))
680	<	return;
677	>	// Handle screen fault
678	>	extern bool Screen_fault_handler(sigsegv_address_t, sigsegv_address_t);
679	>	if (Screen_fault_handler(fault_address, fault_instruction))
680	>	return SIGSEGV_RETURN_SUCCESS;
681		#endif
682	<	#if defined(__powerpc__)
683	<	if (addr >= ROM_BASE && addr < ROM_BASE + ROM_SIZE) {
684	<	printf("IGNORE write access to ROM at %08x\n", addr);
685	<	(((ucontext_t *)scp)->uc_mcontext.regs)->nip += 4;
686	<	return;
687	<	}
688	<	if (addr >= 0xf3012000 && addr < 0xf3014000 && 0) {
689	<	printf("IGNORE write access to ROM at %08x\n", addr);
690	<	(((ucontext_t *)scp)->uc_mcontext.regs)->nip += 4;
691	<	return;
682	>
683	>	const uintptr addr = (uintptr)fault_address;
684	>	#if HAVE_SIGSEGV_SKIP_INSTRUCTION
685	>	// Ignore writes to ROM
686	>	if ((addr - ROM_BASE) < ROM_SIZE)
687	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
688	>
689	>	// Get program counter of target CPU
690	>	sheepshaver_cpu * const cpu = current_cpu;
691	>	const uint32 pc = cpu->pc();
692	>
693	>	// Fault in Mac ROM or RAM?
694	>	bool mac_fault = (pc >= ROM_BASE) && (pc < (ROM_BASE + ROM_AREA_SIZE)) || (pc >= RAMBase) && (pc < (RAMBase + RAMSize));
695	>	if (mac_fault) {
696	>
697	>	// "VM settings" during MacOS 8 installation
698	>	if (pc == ROM_BASE + 0x488160 && cpu->gpr(20) == 0xf8000000)
699	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
700	>
701	>	// MacOS 8.5 installation
702	>	else if (pc == ROM_BASE + 0x488140 && cpu->gpr(16) == 0xf8000000)
703	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
704	>
705	>	// MacOS 8 serial drivers on startup
706	>	else if (pc == ROM_BASE + 0x48e080 && (cpu->gpr(8) == 0xf3012002 || cpu->gpr(8) == 0xf3012000))
707	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
708	>
709	>	// MacOS 8.1 serial drivers on startup
710	>	else if (pc == ROM_BASE + 0x48c5e0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
711	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
712	>	else if (pc == ROM_BASE + 0x4a10a0 && (cpu->gpr(20) == 0xf3012002 || cpu->gpr(20) == 0xf3012000))
713	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
714	>
715	>	// Ignore all other faults, if requested
716	>	if (PrefsFindBool("ignoresegv"))
717	>	return SIGSEGV_RETURN_SKIP_INSTRUCTION;
718		}
565	–	#endif
566	–	printf("Caught SIGSEGV at address %p\n", sip->si_addr);
567	–	printf("Native PC: %08x\n", (((ucontext_t *)scp)->uc_mcontext.regs)->nip);
568	–	printf("Current CPU: %s\n", current_cpu == main_cpu ? "main" : "interrupts");
569	–	#if 1
570	–	dump_registers();
719		#else
720	<	printf("Main CPU context\n");
573	<	main_cpu->dump_registers();
574	<	printf("Interrupts CPU context\n");
575	<	interrupt_cpu->dump_registers();
720	>	#error "FIXME: You don't have the capability to skip instruction within signal handlers"
721		#endif
722	+
723	+	printf("SIGSEGV\n");
724	+	printf("  pc %p\n", fault_instruction);
725	+	printf("  ea %p\n", fault_address);
726	+	printf(" cpu %s\n", current_cpu == main_cpu ? "main" : "interrupts");
727	+	dump_registers();
728		current_cpu->dump_log();
729		enter_mon();
730		QuitEmulator();
731	+
732	+	return SIGSEGV_RETURN_FAILURE;
733		}
734
735		void init_emul_ppc(void)
#	Line 584 | Line 737 | void init_emul_ppc(void)
737		// Initialize main CPU emulator
738		main_cpu = new sheepshaver_cpu();
739		main_cpu->set_register(powerpc_registers::GPR(3), any_register((uint32)ROM_BASE + 0x30d000));
740	+	main_cpu->set_register(powerpc_registers::GPR(4), any_register(KernelDataAddr + 0x1000));
741		WriteMacInt32(XLM_RUN_MODE, MODE_68K);
742
743		#if MULTICORE_CPU
#	Line 591 | Line 745 | void init_emul_ppc(void)
745		interrupt_cpu = new sheepshaver_cpu();
746		#endif
747
748	<	// Install SIGSEGV handler
749	<	sigemptyset(&sigsegv_action.sa_mask);
596	<	sigsegv_action.sa_sigaction = sigsegv_handler;
597	<	sigsegv_action.sa_flags = SA_SIGINFO;
598	<	sigsegv_action.sa_restorer = NULL;
599	<	sigaction(SIGSEGV, &sigsegv_action, NULL);
748	>	// Install the handler for SIGSEGV
749	>	sigsegv_install_handler(sigsegv_handler);
750
751		#if ENABLE_MON
752		// Install "regs" command in cxmon
753		mon_add_command("regs", dump_registers, "regs                     Dump PowerPC registers\n");
754		mon_add_command("log", dump_log, "log                      Dump PowerPC emulation log\n");
755		#endif
756	+
757	+	#if EMUL_TIME_STATS
758	+	emul_start_time = clock();
759	+	#endif
760	+	}
761	+
762	+	/*
763	+	*  Deinitialize emulation
764	+	*/
765	+
766	+	void exit_emul_ppc(void)
767	+	{
768	+	#if EMUL_TIME_STATS
769	+	clock_t emul_end_time = clock();
770	+
771	+	printf("### Statistics for SheepShaver emulation parts\n");
772	+	const clock_t emul_time = emul_end_time - emul_start_time;
773	+	printf("Total emulation time : %.1f sec\n", double(emul_time) / double(CLOCKS_PER_SEC));
774	+	printf("Total interrupt count: %d (%2.1f Hz)\n", interrupt_count,
775	+	(double(interrupt_count) * CLOCKS_PER_SEC) / double(emul_time));
776	+
777	+	#define PRINT_STATS(LABEL, VAR_PREFIX) do {                                                             \
778	+	printf("Total " LABEL " count : %d\n", VAR_PREFIX##_count);             \
779	+	printf("Total " LABEL " time  : %.1f sec (%.1f%%)\n",                   \
780	+	double(VAR_PREFIX##_time) / double(CLOCKS_PER_SEC),          \
781	+	100.0 * double(VAR_PREFIX##_time) / double(emul_time));      \
782	+	} while (0)
783	+
784	+	PRINT_STATS("Execute68k[Trap] execution", exec68k);
785	+	PRINT_STATS("NativeOp execution", native_exec);
786	+	PRINT_STATS("MacOS routine execution", macos_exec);
787	+
788	+	#undef PRINT_STATS
789	+	printf("\n");
790	+	#endif
791	+
792	+	delete main_cpu;
793	+	#if MULTICORE_CPU
794	+	delete interrupt_cpu;
795	+	#endif
796		}
797
798		/*
#	Line 612 | Line 802 | void init_emul_ppc(void)
802		void emul_ppc(uint32 entry)
803		{
804		current_cpu = main_cpu;
805	+	#if 0
806		current_cpu->start_log();
807	+	#endif
808	+	// start emulation loop and enable code translation or caching
809		current_cpu->execute(entry);
810		}
811
#	Line 620 | Line 813 | void emul_ppc(uint32 entry)
813		*  Handle PowerPC interrupt
814		*/
815
816	<	// Atomic operations
817	<	extern int atomic_add(int *var, int v);
818	<	extern int atomic_and(int *var, int v);
819	<	extern int atomic_or(int *var, int v);
820	<
816	>	#if ASYNC_IRQ
817	>	void HandleInterrupt(void)
818	>	{
819	>	main_cpu->handle_interrupt();
820	>	}
821	>	#else
822		void TriggerInterrupt(void)
823		{
824		#if 0
825		WriteMacInt32(0x16a, ReadMacInt32(0x16a) + 1);
826		#else
827	<	SPCFLAGS_SET( SPCFLAG_INT );
827	>	// Trigger interrupt to main cpu only
828	>	if (main_cpu)
829	>	main_cpu->trigger_interrupt();
830		#endif
831		}
832	+	#endif
833
834	<	static void HandleInterrupt(void)
834	>	void sheepshaver_cpu::handle_interrupt(void)
835		{
836		// Do nothing if interrupts are disabled
837	<	if (int32(ReadMacInt32(XLM_IRQ_NEST)) > 0)
837	>	if (*(int32 *)XLM_IRQ_NEST > 0)
838		return;
839
840		// Do nothing if there is no interrupt pending
#	Line 653 | Line 850 | static void HandleInterrupt(void)
850		// 68k emulator active, trigger 68k interrupt level 1
851		assert(current_cpu == main_cpu);
852		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
853	<	main_cpu->set_cr(main_cpu->get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
853	>	set_cr(get_cr() | tswap32(kernel_data->v[0x674 >> 2]));
854		break;
855
856		#if INTERRUPTS_IN_NATIVE_MODE
857		case MODE_NATIVE:
858		// 68k emulator inactive, in nanokernel?
859		assert(current_cpu == main_cpu);
860	<	if (main_cpu->gpr(1) != KernelDataAddr) {
860	>	if (gpr(1) != KernelDataAddr) {
861		// Prepare for 68k interrupt level 1
862		WriteMacInt16(tswap32(kernel_data->v[0x67c >> 2]), 1);
863		WriteMacInt32(tswap32(kernel_data->v[0x658 >> 2]) + 0xdc,
#	Line 671 | Line 868 | static void HandleInterrupt(void)
868		DisableInterrupt();
869		cpu_push(interrupt_cpu);
870		if (ROMType == ROMTYPE_NEWWORLD)
871	<	current_cpu->interrupt(ROM_BASE + 0x312b1c, main_cpu);
871	>	current_cpu->interrupt(ROM_BASE + 0x312b1c);
872		else
873	<	current_cpu->interrupt(ROM_BASE + 0x312a3c, main_cpu);
873	>	current_cpu->interrupt(ROM_BASE + 0x312a3c);
874		cpu_pop();
875		}
876		break;
#	Line 704 | Line 901 | static void HandleInterrupt(void)
901		if (InterruptFlags & INTFLAG_VIA) {
902		ClearInterruptFlag(INTFLAG_VIA);
903		ADBInterrupt();
904	<	ExecutePPC(VideoVBL);
904	>	ExecuteNative(NATIVE_VIDEO_VBL);
905		}
906		}
907		#endif
#	Line 714 | Line 911 | static void HandleInterrupt(void)
911		}
912		}
913
717	–	/*
718	–	*  Execute NATIVE_OP opcode (called by PowerPC emulator)
719	–	*/
720	–
721	–	#define POWERPC_NATIVE_OP_INIT(LR, OP) \
722	–	tswap32(POWERPC_EMUL_OP | ((LR) << 11) | (((uint32)OP) << 6) | 2)
723	–
724	–	// FIXME: Make sure 32-bit relocations are used
725	–	const uint32 NativeOpTable[NATIVE_OP_MAX] = {
726	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_PATCH_NAME_REGISTRY),
727	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_INSTALL_ACCEL),
728	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_VBL),
729	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_VIDEO_DO_DRIVER_IO),
730	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_IRQ),
731	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_INIT),
732	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_TERM),
733	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_OPEN),
734	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_CLOSE),
735	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_WPUT),
736	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_ETHER_RSRV),
737	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_NOTHING),
738	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_OPEN),
739	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_PRIME_IN),
740	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_PRIME_OUT),
741	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_CONTROL),
742	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_STATUS),
743	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_SERIAL_CLOSE),
744	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_RESOURCE),
745	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_1_RESOURCE),
746	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_IND_RESOURCE),
747	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_GET_1_IND_RESOURCE),
748	–	POWERPC_NATIVE_OP_INIT(1, NATIVE_R_GET_RESOURCE),
749	–	POWERPC_NATIVE_OP_INIT(0, NATIVE_DISABLE_INTERRUPT),
750	–	POWERPC_NATIVE_OP_INIT(0, NATIVE_ENABLE_INTERRUPT),
751	–	};
752	–
914		static void get_resource(void);
915		static void get_1_resource(void);
916		static void get_ind_resource(void);
#	Line 760 | Line 921 | static void r_get_resource(void);
921
922		static void NativeOp(int selector)
923		{
924	+	#if EMUL_TIME_STATS
925	+	native_exec_count++;
926	+	const clock_t native_exec_start = clock();
927	+	#endif
928	+
929		switch (selector) {
930		case NATIVE_PATCH_NAME_REGISTRY:
931		DoPatchNameRegistry();
#	Line 774 | Line 940 | static void NativeOp(int selector)
940		GPR(3) = (int32)(int16)VideoDoDriverIO((void *)GPR(3), (void *)GPR(4),
941		(void *)GPR(5), GPR(6), GPR(7));
942		break;
943	<	case NATIVE_GET_RESOURCE:
944	<	get_resource();
943	>	#ifdef WORDS_BIGENDIAN
944	>	case NATIVE_ETHER_IRQ:
945	>	EtherIRQ();
946		break;
947	<	case NATIVE_GET_1_RESOURCE:
948	<	get_1_resource();
947	>	case NATIVE_ETHER_INIT:
948	>	GPR(3) = InitStreamModule((void *)GPR(3));
949		break;
950	<	case NATIVE_GET_IND_RESOURCE:
951	<	get_ind_resource();
950	>	case NATIVE_ETHER_TERM:
951	>	TerminateStreamModule();
952		break;
953	<	case NATIVE_GET_1_IND_RESOURCE:
954	<	get_1_ind_resource();
953	>	case NATIVE_ETHER_OPEN:
954	>	GPR(3) = ether_open((queue_t *)GPR(3), (void *)GPR(4), GPR(5), GPR(6), (void*)GPR(7));
955	>	break;
956	>	case NATIVE_ETHER_CLOSE:
957	>	GPR(3) = ether_close((queue_t *)GPR(3), GPR(4), (void *)GPR(5));
958	>	break;
959	>	case NATIVE_ETHER_WPUT:
960	>	GPR(3) = ether_wput((queue_t *)GPR(3), (mblk_t *)GPR(4));
961		break;
962	<	case NATIVE_R_GET_RESOURCE:
963	<	r_get_resource();
962	>	case NATIVE_ETHER_RSRV:
963	>	GPR(3) = ether_rsrv((queue_t *)GPR(3));
964		break;
965	+	#else
966	+	case NATIVE_ETHER_INIT:
967	+	// FIXME: needs more complicated thunks
968	+	GPR(3) = false;
969	+	break;
970	+	#endif
971		case NATIVE_SERIAL_NOTHING:
972		case NATIVE_SERIAL_OPEN:
973		case NATIVE_SERIAL_PRIME_IN:
#	Line 809 | Line 988 | static void NativeOp(int selector)
988		GPR(3) = serial_callbacks[selector - NATIVE_SERIAL_NOTHING](GPR(3), GPR(4));
989		break;
990		}
991	+	case NATIVE_GET_RESOURCE:
992	+	case NATIVE_GET_1_RESOURCE:
993	+	case NATIVE_GET_IND_RESOURCE:
994	+	case NATIVE_GET_1_IND_RESOURCE:
995	+	case NATIVE_R_GET_RESOURCE: {
996	+	typedef void (*GetResourceCallback)(void);
997	+	static const GetResourceCallback get_resource_callbacks[] = {
998	+	get_resource,
999	+	get_1_resource,
1000	+	get_ind_resource,
1001	+	get_1_ind_resource,
1002	+	r_get_resource
1003	+	};
1004	+	get_resource_callbacks[selector - NATIVE_GET_RESOURCE]();
1005	+	break;
1006	+	}
1007		case NATIVE_DISABLE_INTERRUPT:
1008		DisableInterrupt();
1009		break;
1010		case NATIVE_ENABLE_INTERRUPT:
1011		EnableInterrupt();
1012		break;
1013	+	case NATIVE_MAKE_EXECUTABLE:
1014	+	MakeExecutable(0, (void *)GPR(4), GPR(5));
1015	+	break;
1016	+	case NATIVE_CHECK_LOAD_INVOC:
1017	+	check_load_invoc(GPR(3), GPR(4), GPR(5));
1018	+	break;
1019		default:
1020		printf("FATAL: NATIVE_OP called with bogus selector %d\n", selector);
1021		QuitEmulator();
1022		break;
1023		}
823	–	}
824	–
825	–	/*
826	–	*  Execute native subroutine (LR must contain return address)
827	–	*/
1024
1025	<	void ExecuteNative(int selector)
1026	<	{
1027	<	uint32 tvect[2];
832	<	tvect[0] = tswap32(POWERPC_NATIVE_OP_FUNC(selector));
833	<	tvect[1] = 0; // Fake TVECT
834	<	RoutineDescriptor desc = BUILD_PPC_ROUTINE_DESCRIPTOR(0, tvect);
835	<	M68kRegisters r;
836	<	Execute68k((uint32)&desc, &r);
1025	>	#if EMUL_TIME_STATS
1026	>	native_exec_time += (clock() - native_exec_start);
1027	>	#endif
1028		}
1029
1030		/*
#	Line 854 | Line 1045 | void Execute68k(uint32 pc, M68kRegisters
1045
1046		void Execute68kTrap(uint16 trap, M68kRegisters *r)
1047		{
1048	<	uint16 proc[2] = {trap, M68K_RTS};
1049	<	Execute68k((uint32)proc, r);
1048	>	SheepVar proc_var(4);
1049	>	uint32 proc = proc_var.addr();
1050	>	WriteMacInt16(proc, trap);
1051	>	WriteMacInt16(proc + 2, M68K_RTS);
1052	>	Execute68k(proc, r);
1053		}
1054
1055		/*
#	Line 910 | Line 1104 | uint32 call_macos7(uint32 tvect, uint32
1104		}
1105
1106		/*
913	–	*  Atomic operations
914	–	*/
915	–
916	–	int atomic_add(int *var, int v)
917	–	{
918	–	int ret = *var;
919	–	*var += v;
920	–	return ret;
921	–	}
922	–
923	–	int atomic_and(int *var, int v)
924	–	{
925	–	int ret = *var;
926	–	*var &= v;
927	–	return ret;
928	–	}
929	–
930	–	int atomic_or(int *var, int v)
931	–	{
932	–	int ret = *var;
933	–	*var |= v;
934	–	return ret;
935	–	}
936	–
937	–	/*
1107		*  Resource Manager thunks
1108		*/
1109

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