[ViewVC] Diff of: cebix/BasiliskII/src/Unix/sigsegv.cpp

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.49 by gbeauche, 2004-12-02T23:29:52Z vs.
Revision 1.88 by asvitkine, 2009-04-13T19:57:08Z

#	Line 10 \| Line 10
10		* tjw@omnigroup.com Sun, 4 Jun 2000
11		* www.omnigroup.com/mailman/archive/macosx-dev/2000-June/002030.html
12		*
13	<	* Basilisk II (C) 1997-2004 Christian Bauer
13	>	* Basilisk II (C) 1997-2008 Christian Bauer
14		*
15		* This program is free software; you can redistribute it and/or modify
16		* it under the terms of the GNU General Public License as published by
#	Line 49 \| Line 49 \| using std::list;
49		#define RETSIGTYPE void
50		#endif
51
52	+	// Size of an unsigned integer large enough to hold all bits of a pointer
53	+	// NOTE: this can be different than SIGSEGV_REGISTER_TYPE. In
54	+	// particular, on ILP32 systems with a 64-bit kernel (HP-UX/ia64?)
55	+	#if defined(HAVE_WIN32_VM) && !defined(__CYGWIN__)
56	+	// Windows is either ILP32 or LLP64
57	+	typedef UINT_PTR sigsegv_uintptr_t;
58	+	#else
59	+	// Other systems are sane enough to follow ILP32 or LP64 models
60	+	typedef unsigned long sigsegv_uintptr_t;
61	+	#endif
62	+
63		// Type of the system signal handler
64		typedef RETSIGTYPE (*signal_handler)(int);
65
#	Line 66 \| Line 77 \| static bool sigsegv_do_install_handler(i
77		* Instruction decoding aids
78		*/
79
80	+	// Transfer type
81	+	enum transfer_type_t {
82	+	SIGSEGV_TRANSFER_UNKNOWN = 0,
83	+	SIGSEGV_TRANSFER_LOAD = 1,
84	+	SIGSEGV_TRANSFER_STORE = 2
85	+	};
86	+
87		// Transfer size
88		enum transfer_size_t {
89		SIZE_UNKNOWN,
90		SIZE_BYTE,
91		SIZE_WORD, // 2 bytes
92		SIZE_LONG, // 4 bytes
93	<	SIZE_QUAD, // 8 bytes
93	>	SIZE_QUAD // 8 bytes
94		};
95
96	<	// Transfer type
79	<	typedef sigsegv_transfer_type_t transfer_type_t;
80	<
81	<	#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__))
96	>	#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__) \|\| defined(__ppc64__))
97		// Addressing mode
98		enum addressing_mode_t {
99		MODE_UNKNOWN,
#	Line 226 \| Line 241 \| static void powerpc_decode_instruction(i
241
242		#if HAVE_SIGINFO_T
243		// Generic extended signal handler
244	<	#if defined(__NetBSD__) \|\| defined(__FreeBSD__)
244	>	#if defined(__FreeBSD__)
245		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGBUS)
246	+	#elif defined(__hpux)
247	+	#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGSEGV) FAULT_HANDLER(SIGBUS)
248		#else
249		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGSEGV)
250		#endif
#	Line 240 \| Line 257 \| static void powerpc_decode_instruction(i
257		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
258		#define SIGSEGV_FAULT_INSTRUCTION (unsigned long)SIGSEGV_CONTEXT_REGS[CTX_EPC]
259		#if (defined(mips) \|\| defined(__mips))
260	<	#define SIGSEGV_REGISTER_FILE SIGSEGV_CONTEXT_REGS
260	>	#define SIGSEGV_REGISTER_FILE &SIGSEGV_CONTEXT_REGS[CTX_EPC], &SIGSEGV_CONTEXT_REGS[CTX_R0]
261		#define SIGSEGV_SKIP_INSTRUCTION mips_skip_instruction
262		#endif
263		#endif
#	Line 256 \| Line 273 \| static void powerpc_decode_instruction(i
273		#define SIGSEGV_REGISTER_FILE ((unsigned long *)SIGSEGV_CONTEXT_REGS), SIGSEGV_SPARC_GWINDOWS, SIGSEGV_SPARC_RWINDOW
274		#define SIGSEGV_SKIP_INSTRUCTION sparc_skip_instruction
275		#endif
276	+	#if defined(__i386__)
277	+	#include <sys/regset.h>
278	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
279	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[EIP]
280	+	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
281	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
282	+	#endif
283		#endif
284	<	#if defined(__FreeBSD__)
284	>	#if defined(__FreeBSD__) \|\| defined(__OpenBSD__)
285		#if (defined(i386) \|\| defined(__i386__))
286		#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext *)scp)->sc_eip)
287	<	#define SIGSEGV_REGISTER_FILE ((unsigned long )&(((struct sigcontext )scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
287	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE )&(((struct sigcontext )scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
288	>	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
289	>	#endif
290	>	#endif
291	>	#if defined(__NetBSD__)
292	>	#if (defined(i386) \|\| defined(__i386__))
293	>	#include <sys/ucontext.h>
294	>	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
295	>	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_EIP]
296	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
297		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
298		#endif
299	+	#if (defined(powerpc) \|\| defined(__powerpc__))
300	+	#include <sys/ucontext.h>
301	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
302	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_PC]
303	+	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIGSEGV_CONTEXT_REGS[_REG_PC], (unsigned long )&SIGSEGV_CONTEXT_REGS[_REG_R0]
304	+	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
305	+	#endif
306		#endif
307		#if defined(__linux__)
308		#if (defined(i386) \|\| defined(__i386__))
309		#include <sys/ucontext.h>
310		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
311		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[14] /* should use REG_EIP instead */
312	<	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
312	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
313		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
314		#endif
315		#if (defined(x86_64) \|\| defined(__x86_64__))
316		#include <sys/ucontext.h>
317		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
318		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[16] /* should use REG_RIP instead */
319	<	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
319	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
320		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
321		#endif
322		#if (defined(ia64) \|\| defined(__ia64__))
323	<	#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext )scp)->sc_ip & ~0x3ULL) / slot number is in bits 0 and 1 */
323	>	#define SIGSEGV_CONTEXT_REGS ((struct sigcontext *)scp)
324	>	#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS->sc_ip & ~0x3ULL) /* slot number is in bits 0 and 1 */
325	>	#define SIGSEGV_REGISTER_FILE SIGSEGV_CONTEXT_REGS
326	>	#define SIGSEGV_SKIP_INSTRUCTION ia64_skip_instruction
327		#endif
328		#if (defined(powerpc) \|\| defined(__powerpc__))
329		#include <sys/ucontext.h>
#	Line 300 \| Line 343 \| static void powerpc_decode_instruction(i
343		#define SIGSEGV_REGISTER_FILE (&SIGSEGV_CONTEXT_REGS.arm_r0)
344		#define SIGSEGV_SKIP_INSTRUCTION arm_skip_instruction
345		#endif
346	+	#if (defined(mips) \|\| defined(__mips__))
347	+	#include <sys/ucontext.h>
348	+	#define SIGSEGV_CONTEXT_REGS (((struct ucontext *)scp)->uc_mcontext)
349	+	#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS.pc)
350	+	#define SIGSEGV_REGISTER_FILE &SIGSEGV_CONTEXT_REGS.pc, &SIGSEGV_CONTEXT_REGS.gregs[0]
351	+	#define SIGSEGV_SKIP_INSTRUCTION mips_skip_instruction
352	+	#endif
353	+	#endif
354	+	#if (defined(__hpux) \|\| defined(__hpux__))
355	+	#if (defined(__hppa) \|\| defined(__hppa__))
356	+	#define SIGSEGV_CONTEXT_REGS (&((ucontext_t *)scp)->uc_mcontext)
357	+	#define SIGSEGV_FAULT_INSTRUCTION_32 (SIGSEGV_CONTEXT_REGS->ss_narrow.ss_pcoq_head & ~3ul)
358	+	#define SIGSEGV_FAULT_INSTRUCTION_64 (SIGSEGV_CONTEXT_REGS->ss_wide.ss_64.ss_pcoq_head & ~3ull)
359	+	#if defined(__LP64__)
360	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_FAULT_INSTRUCTION_64
361	+	#else
362	+	#define SIGSEGV_FAULT_INSTRUCTION ((SIGSEGV_CONTEXT_REGS->ss_flags & SS_WIDEREGS) ? \
363	+	(uint32_t)SIGSEGV_FAULT_INSTRUCTION_64 : \
364	+	SIGSEGV_FAULT_INSTRUCTION_32)
365	+	#endif
366	+	#endif
367	+	#if (defined(__ia64) \|\| defined(__ia64__))
368	+	#include <sys/ucontext.h>
369	+	#define SIGSEGV_CONTEXT_REGS ((ucontext_t *)scp)
370	+	#define SIGSEGV_FAULT_INSTRUCTION get_fault_instruction(SIGSEGV_CONTEXT_REGS)
371	+	#define SIGSEGV_REGISTER_FILE SIGSEGV_CONTEXT_REGS
372	+	#define SIGSEGV_SKIP_INSTRUCTION ia64_skip_instruction
373	+
374	+	#include <sys/uc_access.h>
375	+	static inline sigsegv_address_t get_fault_instruction(const ucontext_t *ucp)
376	+	{
377	+	uint64_t ip;
378	+	if (__uc_get_ip(ucp, &ip) != 0)
379	+	return SIGSEGV_INVALID_ADDRESS;
380	+	return (sigsegv_address_t)(ip & ~3ULL);
381	+	}
382	+	#endif
383		#endif
384		#endif
385
#	Line 314 \| Line 394 \| static void powerpc_decode_instruction(i
394		#define SIGSEGV_FAULT_HANDLER_ARGS &scs
395		#define SIGSEGV_FAULT_ADDRESS scp->cr2
396		#define SIGSEGV_FAULT_INSTRUCTION scp->eip
397	<	#define SIGSEGV_REGISTER_FILE (unsigned long *)scp
397	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)scp
398		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
399		#endif
400		#if (defined(sparc) \|\| defined(__sparc__))
#	Line 435 \| Line 515 \| static sigsegv_address_t get_fault_addre
515		#define SIGSEGV_FAULT_HANDLER_ARGS sig, code, scp, addr
516		#define SIGSEGV_FAULT_ADDRESS addr
517		#define SIGSEGV_FAULT_INSTRUCTION scp->sc_eip
518	<	#define SIGSEGV_REGISTER_FILE ((unsigned long *)&scp->sc_edi)
518	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&scp->sc_edi)
519		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
520		#endif
521		#if (defined(alpha) \|\| defined(__alpha__))
#	Line 470 \| Line 550 \| static sigsegv_address_t get_fault_addre
550		#ifndef HAVE_MACH_EXCEPTIONS
551		#if defined(__APPLE__) && defined(__MACH__)
552		#if (defined(ppc) \|\| defined(__ppc__))
553	<	#define SIGSEGV_FAULT_HANDLER_ARGLIST int sig, int code, struct sigcontext *scp
553	>	#define SIGSEGV_FAULT_HANDLER_ARGLIST int sig, int code, struct __darwin_sigcontext *scp
554		#define SIGSEGV_FAULT_HANDLER_ARGS sig, code, scp
555		#define SIGSEGV_FAULT_ADDRESS get_fault_address(scp)
556	<	#define SIGSEGV_FAULT_INSTRUCTION scp->sc_ir
556	>	#define SIGSEGV_FAULT_INSTRUCTION scp->MACH_FIELD_NAME(sc_ir)
557		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGBUS)
558		#define SIGSEGV_REGISTER_FILE (unsigned int )&scp->sc_ir, &((unsigned int ) scp->sc_regs)[2]
559		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
#	Line 481 \| Line 561 \| static sigsegv_address_t get_fault_addre
561		// Use decoding scheme from SheepShaver
562		static sigsegv_address_t get_fault_address(struct sigcontext *scp)
563		{
564	<	unsigned int nip = (unsigned int) scp->sc_ir;
565	<	unsigned int * gpr = &((unsigned int *) scp->sc_regs)[2];
564	>	unsigned int nip = (unsigned int) scp->MACH_FIELD_NAME(sc_ir);
565	>	unsigned int * gpr = &((unsigned int *) scp->MACH_FIELD_NAME(sc_regs))[2];
566		instruction_t instr;
567
568	<	powerpc_decode_instruction(&instr, nip, gpr);
568	>	powerpc_decode_instruction(&instr, nip, (long unsigned int*)gpr);
569		return (sigsegv_address_t)instr.addr;
570		}
571		#endif
#	Line 502 \| Line 582 \| static sigsegv_address_t get_fault_addre
582		#define SIGSEGV_FAULT_HANDLER_ARGS ExceptionInfo
583		#define SIGSEGV_FAULT_ADDRESS ExceptionInfo->ExceptionRecord->ExceptionInformation[1]
584		#define SIGSEGV_CONTEXT_REGS ExceptionInfo->ContextRecord
585	+	#if defined(_M_IX86)
586		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->Eip
587	<	#define SIGSEGV_REGISTER_FILE ((unsigned long *)&SIGSEGV_CONTEXT_REGS->Edi)
587	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIGSEGV_CONTEXT_REGS->Edi)
588		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
589		#endif
590	+	#if defined(_M_X64)
591	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->Rip
592	+	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIGSEGV_CONTEXT_REGS->Rax)
593	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
594	+	#endif
595	+	#if defined(_M_IA64)
596	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->StIIP
597	+	#endif
598	+	#endif
599
600		#if HAVE_MACH_EXCEPTIONS
601
#	Line 527 \| Line 617 \| extern "C" {
617		#include <mach/mach.h>
618		#include <mach/mach_error.h>
619
620	<	extern boolean_t exc_server(mach_msg_header_t , mach_msg_header_t );
621	<	extern kern_return_t catch_exception_raise(mach_port_t, mach_port_t,
622	<	mach_port_t, exception_type_t, exception_data_t, mach_msg_type_number_t);
623	<	extern kern_return_t exception_raise(mach_port_t, mach_port_t, mach_port_t,
624	<	exception_type_t, exception_data_t, mach_msg_type_number_t);
625	<	extern kern_return_t exception_raise_state(mach_port_t, exception_type_t,
626	<	exception_data_t, mach_msg_type_number_t, thread_state_flavor_t *,
620	>	#ifndef HAVE_MACH64_VM
621	>
622	>	// Undefine this to prevent a preprocessor warning when compiling on a
623	>	// 32-bit machine with Mac OS X 10.5.
624	>	#undef MACH_EXCEPTION_CODES
625	>
626	>	#define MACH_EXCEPTION_CODES 0
627	>	#define mach_exception_data_t exception_data_t
628	>	#define mach_exception_data_type_t exception_data_type_t
629	>	#define mach_exc_server exc_server
630	>	#define catch_mach_exception_raise catch_exception_raise
631	>	#define mach_exception_raise exception_raise
632	>	#define mach_exception_raise_state exception_raise_state
633	>	#define mach_exception_raise_state_identity exception_raise_state_identity
634	>	#endif
635	>
636	>	extern boolean_t mach_exc_server(mach_msg_header_t , mach_msg_header_t );
637	>	extern kern_return_t catch_mach_exception_raise(mach_port_t, mach_port_t,
638	>	mach_port_t, exception_type_t, mach_exception_data_t, mach_msg_type_number_t);
639	>	extern kern_return_t catch_mach_exception_raise_state(mach_port_t exception_port,
640	>	exception_type_t exception, mach_exception_data_t code, mach_msg_type_number_t code_count,
641	>	int *flavor,
642	>	thread_state_t old_state, mach_msg_type_number_t old_state_count,
643	>	thread_state_t new_state, mach_msg_type_number_t *new_state_count);
644	>	extern kern_return_t catch_mach_exception_raise_state_identity(mach_port_t exception_port,
645	>	mach_port_t thread_port, mach_port_t task_port, exception_type_t exception,
646	>	mach_exception_data_t code, mach_msg_type_number_t code_count,
647	>	int *flavor,
648	>	thread_state_t old_state, mach_msg_type_number_t old_state_count,
649	>	thread_state_t new_state, mach_msg_type_number_t *new_state_count);
650	>	extern kern_return_t mach_exception_raise(mach_port_t, mach_port_t, mach_port_t,
651	>	exception_type_t, mach_exception_data_t, mach_msg_type_number_t);
652	>	extern kern_return_t mach_exception_raise_state(mach_port_t, exception_type_t,
653	>	mach_exception_data_t, mach_msg_type_number_t, thread_state_flavor_t *,
654		thread_state_t, mach_msg_type_number_t, thread_state_t, mach_msg_type_number_t *);
655	<	extern kern_return_t exception_raise_state_identity(mach_port_t, mach_port_t, mach_port_t,
656	<	exception_type_t, exception_data_t, mach_msg_type_number_t, thread_state_flavor_t *,
655	>	extern kern_return_t mach_exception_raise_state_identity(mach_port_t, mach_port_t, mach_port_t,
656	>	exception_type_t, mach_exception_data_t, mach_msg_type_number_t, thread_state_flavor_t *,
657		thread_state_t, mach_msg_type_number_t, thread_state_t, mach_msg_type_number_t *);
658		}
659
#	Line 567 \| Line 684 \| if (ret != KERN_SUCCESS) { \
684		exit (1); \
685		}
686
687	<	#define SIGSEGV_FAULT_ADDRESS code[1]
688	<	#define SIGSEGV_FAULT_INSTRUCTION get_fault_instruction(thread, state)
572	<	#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP) ((code[0] == KERN_PROTECTION_FAILURE) ? sigsegv_fault_handler(ADDR, IP) : SIGSEGV_RETURN_FAILURE)
573	<	#define SIGSEGV_FAULT_HANDLER_ARGLIST mach_port_t thread, exception_data_t code, ppc_thread_state_t *state
574	<	#define SIGSEGV_FAULT_HANDLER_ARGS thread, code, &state
575	<	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
576	<	#define SIGSEGV_REGISTER_FILE &state->srr0, &state->r0
577	<
578	<	// Given a suspended thread, stuff the current instruction and
579	<	// registers into state.
580	<	//
581	<	// It would have been nice to have this be ppc/x86 independant which
582	<	// could have been done easily with a thread_state_t instead of
583	<	// ppc_thread_state_t, but because of the way this is called it is
584	<	// easier to do it this way.
585	<	#if (defined(ppc) \|\| defined(__ppc__))
586	<	static inline sigsegv_address_t get_fault_instruction(mach_port_t thread, ppc_thread_state_t *state)
587	<	{
588	<	kern_return_t krc;
589	<	mach_msg_type_number_t count;
590	<
591	<	count = MACHINE_THREAD_STATE_COUNT;
592	<	krc = thread_get_state(thread, MACHINE_THREAD_STATE, (thread_state_t)state, &count);
593	<	MACH_CHECK_ERROR (thread_get_state, krc);
594	<
595	<	return (sigsegv_address_t)state->srr0;
596	<	}
687	>	#ifndef MACH_FIELD_NAME
688	>	#define MACH_FIELD_NAME(X) X
689		#endif
690
691		// Since there can only be one exception thread running at any time
#	Line 625 \| Line 717 \| *handleExceptions(void priv)**
717		_exceptionPort, 0, MACH_PORT_NULL);
718		MACH_CHECK_ERROR(mach_msg, krc);
719
720	<	if (!exc_server(msg, reply)) {
720	>	if (!mach_exc_server(msg, reply)) {
721		fprintf(stderr, "exc_server hated the message\n");
722		exit(1);
723		}
#	Line 647 \| Line 739 \| *handleExceptions(void priv)**
739		* Instruction skipping
740		*/
741
742	+	#ifndef SIGSEGV_REGISTER_TYPE
743	+	#define SIGSEGV_REGISTER_TYPE sigsegv_uintptr_t
744	+	#endif
745	+
746		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
747		// Decode and skip X86 instruction
748	<	#if (defined(i386) \|\| defined(__i386__)) \|\| defined(__x86_64__)
748	>	#if (defined(i386) \|\| defined(__i386__)) \|\| (defined(__x86_64__) \|\| defined(_M_X64))
749		#if defined(__linux__)
750		enum {
751		#if (defined(i386) \|\| defined(__i386__))
#	Line 684 \| Line 780 \| enum {
780		#endif
781		};
782		#endif
783	<	#if defined(__NetBSD__) \|\| defined(__FreeBSD__)
783	>	#if defined(__NetBSD__)
784	>	enum {
785	>	#if (defined(i386) \|\| defined(__i386__))
786	>	X86_REG_EIP = _REG_EIP,
787	>	X86_REG_EAX = _REG_EAX,
788	>	X86_REG_ECX = _REG_ECX,
789	>	X86_REG_EDX = _REG_EDX,
790	>	X86_REG_EBX = _REG_EBX,
791	>	X86_REG_ESP = _REG_ESP,
792	>	X86_REG_EBP = _REG_EBP,
793	>	X86_REG_ESI = _REG_ESI,
794	>	X86_REG_EDI = _REG_EDI
795	>	#endif
796	>	};
797	>	#endif
798	>	#if defined(__FreeBSD__)
799		enum {
800		#if (defined(i386) \|\| defined(__i386__))
801		X86_REG_EIP = 10,
#	Line 699 \| Line 810 \| enum {
810		#endif
811		};
812		#endif
813	<	#if defined(_WIN32)
813	>	#if defined(__OpenBSD__)
814	>	enum {
815	>	#if defined(__i386__)
816	>	// EDI is the first register we consider
817	>	#define OREG(REG) offsetof(struct sigcontext, sc_##REG)
818	>	#define DREG(REG) ((OREG(REG) - OREG(edi)) / 4)
819	>	X86_REG_EIP = DREG(eip), // 7
820	>	X86_REG_EAX = DREG(eax), // 6
821	>	X86_REG_ECX = DREG(ecx), // 5
822	>	X86_REG_EDX = DREG(edx), // 4
823	>	X86_REG_EBX = DREG(ebx), // 3
824	>	X86_REG_ESP = DREG(esp), // 10
825	>	X86_REG_EBP = DREG(ebp), // 2
826	>	X86_REG_ESI = DREG(esi), // 1
827	>	X86_REG_EDI = DREG(edi) // 0
828	>	#undef DREG
829	>	#undef OREG
830	>	#endif
831	>	};
832	>	#endif
833	>	#if defined(__sun__)
834	>	// Same as for Linux, need to check for x86-64
835	>	enum {
836	>	#if defined(__i386__)
837	>	X86_REG_EIP = EIP,
838	>	X86_REG_EAX = EAX,
839	>	X86_REG_ECX = ECX,
840	>	X86_REG_EDX = EDX,
841	>	X86_REG_EBX = EBX,
842	>	X86_REG_ESP = ESP,
843	>	X86_REG_EBP = EBP,
844	>	X86_REG_ESI = ESI,
845	>	X86_REG_EDI = EDI
846	>	#endif
847	>	};
848	>	#endif
849	>	#if defined(__APPLE__) && defined(__MACH__)
850		enum {
851		#if (defined(i386) \|\| defined(__i386__))
852	+	#ifdef i386_SAVED_STATE
853	+	// same as FreeBSD (in Open Darwin 8.0.1)
854	+	X86_REG_EIP = 10,
855	+	X86_REG_EAX = 7,
856	+	X86_REG_ECX = 6,
857	+	X86_REG_EDX = 5,
858	+	X86_REG_EBX = 4,
859	+	X86_REG_ESP = 13,
860	+	X86_REG_EBP = 2,
861	+	X86_REG_ESI = 1,
862	+	X86_REG_EDI = 0
863	+	#else
864	+	// new layout (MacOS X 10.4.4 for x86)
865	+	X86_REG_EIP = 10,
866	+	X86_REG_EAX = 0,
867	+	X86_REG_ECX = 2,
868	+	X86_REG_EDX = 3,
869	+	X86_REG_EBX = 1,
870	+	X86_REG_ESP = 7,
871	+	X86_REG_EBP = 6,
872	+	X86_REG_ESI = 5,
873	+	X86_REG_EDI = 4
874	+	#endif
875	+	#endif
876	+	#if defined(__x86_64__)
877	+	X86_REG_R8 = 8,
878	+	X86_REG_R9 = 9,
879	+	X86_REG_R10 = 10,
880	+	X86_REG_R11 = 11,
881	+	X86_REG_R12 = 12,
882	+	X86_REG_R13 = 13,
883	+	X86_REG_R14 = 14,
884	+	X86_REG_R15 = 15,
885	+	X86_REG_EDI = 4,
886	+	X86_REG_ESI = 5,
887	+	X86_REG_EBP = 6,
888	+	X86_REG_EBX = 1,
889	+	X86_REG_EDX = 3,
890	+	X86_REG_EAX = 0,
891	+	X86_REG_ECX = 2,
892	+	X86_REG_ESP = 7,
893	+	X86_REG_EIP = 16
894	+	#endif
895	+	};
896	+	#endif
897	+	#if defined(_WIN32)
898	+	enum {
899	+	#if defined(_M_IX86)
900		X86_REG_EIP = 7,
901		X86_REG_EAX = 5,
902		X86_REG_ECX = 4,
#	Line 712 \| Line 907 \| enum {
907		X86_REG_ESI = 1,
908		X86_REG_EDI = 0
909		#endif
910	+	#if defined(_M_X64)
911	+	X86_REG_EAX = 0,
912	+	X86_REG_ECX = 1,
913	+	X86_REG_EDX = 2,
914	+	X86_REG_EBX = 3,
915	+	X86_REG_ESP = 4,
916	+	X86_REG_EBP = 5,
917	+	X86_REG_ESI = 6,
918	+	X86_REG_EDI = 7,
919	+	X86_REG_R8 = 8,
920	+	X86_REG_R9 = 9,
921	+	X86_REG_R10 = 10,
922	+	X86_REG_R11 = 11,
923	+	X86_REG_R12 = 12,
924	+	X86_REG_R13 = 13,
925	+	X86_REG_R14 = 14,
926	+	X86_REG_R15 = 15,
927	+	X86_REG_EIP = 16
928	+	#endif
929		};
930		#endif
931		// FIXME: this is partly redundant with the instruction decoding phase
#	Line 748 \| Line 962 \| static inline int ix86_step_over_modrm(u
962		return offset;
963		}
964
965	<	static bool ix86_skip_instruction(unsigned long * regs)
965	>	static bool ix86_skip_instruction(SIGSEGV_REGISTER_TYPE * regs)
966		{
967		unsigned char * eip = (unsigned char *)regs[X86_REG_EIP];
968
969		if (eip == 0)
970		return false;
971	+	#ifdef _WIN32
972	+	if (IsBadCodePtr((FARPROC)eip))
973	+	return false;
974	+	#endif
975
976	+	enum instruction_type_t {
977	+	i_MOV,
978	+	i_ADD
979	+	};
980	+
981		transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
982		transfer_size_t transfer_size = SIZE_LONG;
983	+	instruction_type_t instruction_type = i_MOV;
984
985		int reg = -1;
986		int len = 0;
#	Line 774 \| Line 998 \| static bool ix86_skip_instruction(unsign
998		}
999
1000		// REX prefix
1001	<	#if defined(__x86_64__)
1001	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1002		struct rex_t {
1003		unsigned char W;
1004		unsigned char R;
#	Line 807 \| Line 1031 \| static bool ix86_skip_instruction(unsign
1031		#endif
1032
1033		// Decode instruction
1034	+	int op_len = 1;
1035		int target_size = SIZE_UNKNOWN;
1036		switch (eip[0]) {
1037		case 0x0f:
#	Line 821 \| Line 1046 \| static bool ix86_skip_instruction(unsign
1046		transfer_size = SIZE_WORD;
1047		goto do_mov_extend;
1048		do_mov_extend:
1049	<	switch (eip[2] & 0xc0) {
1050	<	case 0x80:
1051	<	reg = (eip[2] >> 3) & 7;
1052	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
1053	<	break;
1054	<	case 0x40:
1055	<	reg = (eip[2] >> 3) & 7;
1056	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
1057	<	break;
1058	<	case 0x00:
1059	<	reg = (eip[2] >> 3) & 7;
1060	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
1061	<	break;
1062	<	}
1063	<	len += 3 + ix86_step_over_modrm(eip + 2);
1064	<	break;
1065	<	}
1066	<	break;
1049	>	op_len = 2;
1050	>	goto do_transfer_load;
1051	>	}
1052	>	break;
1053	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1054	>	case 0x63: // MOVSXD r64, r/m32
1055	>	if (has_rex && rex.W) {
1056	>	transfer_size = SIZE_LONG;
1057	>	target_size = SIZE_QUAD;
1058	>	}
1059	>	else if (transfer_size != SIZE_WORD) {
1060	>	transfer_size = SIZE_LONG;
1061	>	target_size = SIZE_QUAD;
1062	>	}
1063	>	goto do_transfer_load;
1064	>	#endif
1065	>	case 0x02: // ADD r8, r/m8
1066	>	transfer_size = SIZE_BYTE;
1067	>	case 0x03: // ADD r32, r/m32
1068	>	instruction_type = i_ADD;
1069	>	goto do_transfer_load;
1070		case 0x8a: // MOV r8, r/m8
1071		transfer_size = SIZE_BYTE;
1072		case 0x8b: // MOV r32, r/m32 (or 16-bit operation)
1073	<	switch (eip[1] & 0xc0) {
1073	>	do_transfer_load:
1074	>	switch (eip[op_len] & 0xc0) {
1075		case 0x80:
1076	<	reg = (eip[1] >> 3) & 7;
1076	>	reg = (eip[op_len] >> 3) & 7;
1077		transfer_type = SIGSEGV_TRANSFER_LOAD;
1078		break;
1079		case 0x40:
1080	<	reg = (eip[1] >> 3) & 7;
1080	>	reg = (eip[op_len] >> 3) & 7;
1081		transfer_type = SIGSEGV_TRANSFER_LOAD;
1082		break;
1083		case 0x00:
1084	<	reg = (eip[1] >> 3) & 7;
1084	>	reg = (eip[op_len] >> 3) & 7;
1085		transfer_type = SIGSEGV_TRANSFER_LOAD;
1086		break;
1087		}
1088	<	len += 2 + ix86_step_over_modrm(eip + 1);
1088	>	len += 1 + op_len + ix86_step_over_modrm(eip + op_len);
1089		break;
1090	+	case 0x00: // ADD r/m8, r8
1091	+	transfer_size = SIZE_BYTE;
1092	+	case 0x01: // ADD r/m32, r32
1093	+	instruction_type = i_ADD;
1094	+	goto do_transfer_store;
1095		case 0x88: // MOV r/m8, r8
1096		transfer_size = SIZE_BYTE;
1097		case 0x89: // MOV r/m32, r32 (or 16-bit operation)
1098	<	switch (eip[1] & 0xc0) {
1098	>	do_transfer_store:
1099	>	switch (eip[op_len] & 0xc0) {
1100		case 0x80:
1101	<	reg = (eip[1] >> 3) & 7;
1101	>	reg = (eip[op_len] >> 3) & 7;
1102		transfer_type = SIGSEGV_TRANSFER_STORE;
1103		break;
1104		case 0x40:
1105	<	reg = (eip[1] >> 3) & 7;
1105	>	reg = (eip[op_len] >> 3) & 7;
1106		transfer_type = SIGSEGV_TRANSFER_STORE;
1107		break;
1108		case 0x00:
1109	<	reg = (eip[1] >> 3) & 7;
1109	>	reg = (eip[op_len] >> 3) & 7;
1110		transfer_type = SIGSEGV_TRANSFER_STORE;
1111		break;
1112		}
1113	<	len += 2 + ix86_step_over_modrm(eip + 1);
1113	>	len += 1 + op_len + ix86_step_over_modrm(eip + op_len);
1114		break;
1115		}
1116		if (target_size == SIZE_UNKNOWN)
#	Line 886 \| Line 1121 \| static bool ix86_skip_instruction(unsign
1121		return false;
1122		}
1123
1124	<	#if defined(__x86_64__)
1124	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1125		if (rex.R)
1126		reg += 8;
1127		#endif
1128
1129	<	if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
1129	>	if (instruction_type == i_MOV && transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
1130		static const int x86_reg_map[] = {
1131		X86_REG_EAX, X86_REG_ECX, X86_REG_EDX, X86_REG_EBX,
1132		X86_REG_ESP, X86_REG_EBP, X86_REG_ESI, X86_REG_EDI,
1133	<	#if defined(__x86_64__)
1133	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1134		X86_REG_R8, X86_REG_R9, X86_REG_R10, X86_REG_R11,
1135		X86_REG_R12, X86_REG_R13, X86_REG_R14, X86_REG_R15,
1136		#endif
#	Line 927 \| Line 1162 \| static bool ix86_skip_instruction(unsign
1162		}
1163
1164		#if DEBUG
1165	<	printf("%08x: %s %s access", regs[X86_REG_EIP],
1165	>	printf("%p: %s %s access", (void *)regs[X86_REG_EIP],
1166		transfer_size == SIZE_BYTE ? "byte" :
1167		transfer_size == SIZE_WORD ? "word" :
1168		transfer_size == SIZE_LONG ? "long" :
#	Line 982 \| Line 1217 \| static bool ix86_skip_instruction(unsign
1217		}
1218		#endif
1219
1220	+	// Decode and skip IA-64 instruction
1221	+	#if defined(__ia64) \|\| defined(__ia64__)
1222	+	typedef uint64_t ia64_bundle_t[2];
1223	+	#if defined(__linux__)
1224	+	// We can directly patch the slot number
1225	+	#define IA64_CAN_PATCH_IP_SLOT 1
1226	+	// Helper macros to access the machine context
1227	+	#define IA64_CONTEXT_TYPE struct sigcontext *
1228	+	#define IA64_CONTEXT scp
1229	+	#define IA64_GET_IP() (IA64_CONTEXT->sc_ip)
1230	+	#define IA64_SET_IP(V) (IA64_CONTEXT->sc_ip = (V))
1231	+	#define IA64_GET_PR(P) ((IA64_CONTEXT->sc_pr >> (P)) & 1)
1232	+	#define IA64_GET_NAT(I) ((IA64_CONTEXT->sc_nat >> (I)) & 1)
1233	+	#define IA64_GET_GR(R) (IA64_CONTEXT->sc_gr[(R)])
1234	+	#define _IA64_SET_GR(R,V) (IA64_CONTEXT->sc_gr[(R)] = (V))
1235	+	#define _IA64_SET_NAT(I,V) (IA64_CONTEXT->sc_nat = (IA64_CONTEXT->sc_nat & ~(1ull << (I))) \| (((uint64_t)!!(V)) << (I)))
1236	+	#define IA64_SET_GR(R,V,N) (_IA64_SET_GR(R,V), _IA64_SET_NAT(R,N))
1237	+
1238	+	// Load bundle (in little-endian)
1239	+	static inline void ia64_load_bundle(ia64_bundle_t bundle, uint64_t raw_ip)
1240	+	{
1241	+	uint64_t ip = (uint64_t )(raw_ip & ~3ull);
1242	+	bundle[0] = ip[0];
1243	+	bundle[1] = ip[1];
1244	+	}
1245	+	#endif
1246	+	#if defined(__hpux) \|\| defined(__hpux__)
1247	+	// We can directly patch the slot number
1248	+	#define IA64_CAN_PATCH_IP_SLOT 1
1249	+	// Helper macros to access the machine context
1250	+	#define IA64_CONTEXT_TYPE ucontext_t *
1251	+	#define IA64_CONTEXT ucp
1252	+	#define IA64_GET_IP() ia64_get_ip(IA64_CONTEXT)
1253	+	#define IA64_SET_IP(V) ia64_set_ip(IA64_CONTEXT, V)
1254	+	#define IA64_GET_PR(P) ia64_get_pr(IA64_CONTEXT, P)
1255	+	#define IA64_GET_NAT(I) ia64_get_nat(IA64_CONTEXT, I)
1256	+	#define IA64_GET_GR(R) ia64_get_gr(IA64_CONTEXT, R)
1257	+	#define IA64_SET_GR(R,V,N) ia64_set_gr(IA64_CONTEXT, R, V, N)
1258	+	#define UC_ACCESS(FUNC,ARGS) do { if (__uc_##FUNC ARGS != 0) abort(); } while (0)
1259	+
1260	+	static inline uint64_t ia64_get_ip(IA64_CONTEXT_TYPE IA64_CONTEXT)
1261	+	{ uint64_t v; UC_ACCESS(get_ip,(IA64_CONTEXT, &v)); return v; }
1262	+	static inline void ia64_set_ip(IA64_CONTEXT_TYPE IA64_CONTEXT, uint64_t v)
1263	+	{ UC_ACCESS(set_ip,(IA64_CONTEXT, v)); }
1264	+	static inline unsigned int ia64_get_pr(IA64_CONTEXT_TYPE IA64_CONTEXT, int pr)
1265	+	{ uint64_t v; UC_ACCESS(get_prs,(IA64_CONTEXT, &v)); return (v >> pr) & 1; }
1266	+	static inline unsigned int ia64_get_nat(IA64_CONTEXT_TYPE IA64_CONTEXT, int r)
1267	+	{ uint64_t v; unsigned int nat; UC_ACCESS(get_grs,(IA64_CONTEXT, r, 1, &v, &nat)); return (nat >> r) & 1; }
1268	+	static inline uint64_t ia64_get_gr(IA64_CONTEXT_TYPE IA64_CONTEXT, int r)
1269	+	{ uint64_t v; unsigned int nat; UC_ACCESS(get_grs,(IA64_CONTEXT, r, 1, &v, &nat)); return v; }
1270	+
1271	+	static void ia64_set_gr(IA64_CONTEXT_TYPE IA64_CONTEXT, int r, uint64_t v, unsigned int nat)
1272	+	{
1273	+	if (r == 0)
1274	+	return;
1275	+	if (r > 0 && r < 32)
1276	+	UC_ACCESS(set_grs,(IA64_CONTEXT, r, 1, &v, (!!nat) << r));
1277	+	else {
1278	+	uint64_t bsp, bspstore;
1279	+	UC_ACCESS(get_ar_bsp,(IA64_CONTEXT, &bsp));
1280	+	UC_ACCESS(get_ar_bspstore,(IA64_CONTEXT, &bspstore));
1281	+	abort(); /* XXX: use libunwind, this is not fun... */
1282	+	}
1283	+	}
1284	+
1285	+	// Byte-swapping
1286	+	#if defined(__GNUC__)
1287	+	#define BSWAP64(V) ({ uint64_t r; __asm__ __volatile__("mux1 %0=%1,@rev;;" : "=r" (r) : "r" (V)); r; })
1288	+	#elif defined (__HP_aCC)
1289	+	#define BSWAP64(V) _Asm_mux1(_MBTYPE_REV, V)
1290	+	#else
1291	+	#error "Define byte-swap instruction"
1292	+	#endif
1293	+
1294	+	// Load bundle (in little-endian)
1295	+	static inline void ia64_load_bundle(ia64_bundle_t bundle, uint64_t raw_ip)
1296	+	{
1297	+	uint64_t ip = (uint64_t )(raw_ip & ~3ull);
1298	+	bundle[0] = BSWAP64(ip[0]);
1299	+	bundle[1] = BSWAP64(ip[1]);
1300	+	}
1301	+	#endif
1302	+
1303	+	// Instruction operations
1304	+	enum {
1305	+	IA64_INST_UNKNOWN = 0,
1306	+	IA64_INST_LD1, // ld1 op0=[op1]
1307	+	IA64_INST_LD1_UPDATE, // ld1 op0=[op1],op2
1308	+	IA64_INST_LD2, // ld2 op0=[op1]
1309	+	IA64_INST_LD2_UPDATE, // ld2 op0=[op1],op2
1310	+	IA64_INST_LD4, // ld4 op0=[op1]
1311	+	IA64_INST_LD4_UPDATE, // ld4 op0=[op1],op2
1312	+	IA64_INST_LD8, // ld8 op0=[op1]
1313	+	IA64_INST_LD8_UPDATE, // ld8 op0=[op1],op2
1314	+	IA64_INST_ST1, // st1 [op0]=op1
1315	+	IA64_INST_ST1_UPDATE, // st1 [op0]=op1,op2
1316	+	IA64_INST_ST2, // st2 [op0]=op1
1317	+	IA64_INST_ST2_UPDATE, // st2 [op0]=op1,op2
1318	+	IA64_INST_ST4, // st4 [op0]=op1
1319	+	IA64_INST_ST4_UPDATE, // st4 [op0]=op1,op2
1320	+	IA64_INST_ST8, // st8 [op0]=op1
1321	+	IA64_INST_ST8_UPDATE, // st8 [op0]=op1,op2
1322	+	IA64_INST_ADD, // add op0=op1,op2,op3
1323	+	IA64_INST_SUB, // sub op0=op1,op2,op3
1324	+	IA64_INST_SHLADD, // shladd op0=op1,op3,op2
1325	+	IA64_INST_AND, // and op0=op1,op2
1326	+	IA64_INST_ANDCM, // andcm op0=op1,op2
1327	+	IA64_INST_OR, // or op0=op1,op2
1328	+	IA64_INST_XOR, // xor op0=op1,op2
1329	+	IA64_INST_SXT1, // sxt1 op0=op1
1330	+	IA64_INST_SXT2, // sxt2 op0=op1
1331	+	IA64_INST_SXT4, // sxt4 op0=op1
1332	+	IA64_INST_ZXT1, // zxt1 op0=op1
1333	+	IA64_INST_ZXT2, // zxt2 op0=op1
1334	+	IA64_INST_ZXT4, // zxt4 op0=op1
1335	+	IA64_INST_NOP // nop op0
1336	+	};
1337	+
1338	+	const int IA64_N_OPERANDS = 4;
1339	+
1340	+	// Decoded operand type
1341	+	struct ia64_operand_t {
1342	+	uint8_t commit; // commit result of operation to register file?
1343	+	uint8_t valid; // XXX: not really used, can be removed (debug)
1344	+	int8_t index; // index of GPR, or -1 if immediate value
1345	+	uint8_t nat; // NaT state before operation
1346	+	uint64_t value; // register contents or immediate value
1347	+	};
1348	+
1349	+	// Decoded instruction type
1350	+	struct ia64_instruction_t {
1351	+	uint8_t mnemo; // operation to perform
1352	+	uint8_t pred; // predicate register to check
1353	+	uint8_t no_memory; // used to emulated main fault instruction
1354	+	uint64_t inst; // the raw instruction bits (41-bit wide)
1355	+	ia64_operand_t operands[IA64_N_OPERANDS];
1356	+	};
1357	+
1358	+	// Get immediate sign-bit
1359	+	static inline int ia64_inst_get_sbit(uint64_t inst)
1360	+	{
1361	+	return (inst >> 36) & 1;
1362	+	}
1363	+
1364	+	// Get 8-bit immediate value (A3, A8, I27, M30)
1365	+	static inline uint64_t ia64_inst_get_imm8(uint64_t inst)
1366	+	{
1367	+	uint64_t value = (inst >> 13) & 0x7full;
1368	+	if (ia64_inst_get_sbit(inst))
1369	+	value \|= ~0x7full;
1370	+	return value;
1371	+	}
1372	+
1373	+	// Get 9-bit immediate value (M3)
1374	+	static inline uint64_t ia64_inst_get_imm9b(uint64_t inst)
1375	+	{
1376	+	uint64_t value = (((inst >> 27) & 1) << 7) \| ((inst >> 13) & 0x7f);
1377	+	if (ia64_inst_get_sbit(inst))
1378	+	value \|= ~0xffull;
1379	+	return value;
1380	+	}
1381	+
1382	+	// Get 9-bit immediate value (M5)
1383	+	static inline uint64_t ia64_inst_get_imm9a(uint64_t inst)
1384	+	{
1385	+	uint64_t value = (((inst >> 27) & 1) << 7) \| ((inst >> 6) & 0x7f);
1386	+	if (ia64_inst_get_sbit(inst))
1387	+	value \|= ~0xffull;
1388	+	return value;
1389	+	}
1390	+
1391	+	// Get 14-bit immediate value (A4)
1392	+	static inline uint64_t ia64_inst_get_imm14(uint64_t inst)
1393	+	{
1394	+	uint64_t value = (((inst >> 27) & 0x3f) << 7) \| (inst & 0x7f);
1395	+	if (ia64_inst_get_sbit(inst))
1396	+	value \|= ~0x1ffull;
1397	+	return value;
1398	+	}
1399	+
1400	+	// Get 22-bit immediate value (A5)
1401	+	static inline uint64_t ia64_inst_get_imm22(uint64_t inst)
1402	+	{
1403	+	uint64_t value = ((((inst >> 22) & 0x1f) << 16) \|
1404	+	(((inst >> 27) & 0x1ff) << 7) \|
1405	+	(inst & 0x7f));
1406	+	if (ia64_inst_get_sbit(inst))
1407	+	value \|= ~0x1fffffull;
1408	+	return value;
1409	+	}
1410	+
1411	+	// Get 21-bit immediate value (I19)
1412	+	static inline uint64_t ia64_inst_get_imm21(uint64_t inst)
1413	+	{
1414	+	return (((inst >> 36) & 1) << 20) \| ((inst >> 6) & 0xfffff);
1415	+	}
1416	+
1417	+	// Get 2-bit count value (A2)
1418	+	static inline int ia64_inst_get_count2(uint64_t inst)
1419	+	{
1420	+	return (inst >> 27) & 0x3;
1421	+	}
1422	+
1423	+	// Get bundle template
1424	+	static inline unsigned int ia64_get_template(uint64_t ip)
1425	+	{
1426	+	ia64_bundle_t bundle;
1427	+	ia64_load_bundle(bundle, ip);
1428	+	return bundle[0] & 0x1f;
1429	+	}
1430	+
1431	+	// Get specified instruction in bundle
1432	+	static uint64_t ia64_get_instruction(uint64_t ip, int slot)
1433	+	{
1434	+	uint64_t inst;
1435	+	ia64_bundle_t bundle;
1436	+	ia64_load_bundle(bundle, ip);
1437	+	#if DEBUG
1438	+	printf("Bundle: %016llx%016llx\n", bundle[1], bundle[0]);
1439	+	#endif
1440	+
1441	+	switch (slot) {
1442	+	case 0:
1443	+	inst = (bundle[0] >> 5) & 0x1ffffffffffull;
1444	+	break;
1445	+	case 1:
1446	+	inst = ((bundle[1] & 0x7fffffull) << 18) \| ((bundle[0] >> 46) & 0x3ffffull);
1447	+	break;
1448	+	case 2:
1449	+	inst = (bundle[1] >> 23) & 0x1ffffffffffull;
1450	+	break;
1451	+	case 3:
1452	+	fprintf(stderr, "ERROR: ia64_get_instruction(), invalid slot number %d\n", slot);
1453	+	abort();
1454	+	break;
1455	+	}
1456	+
1457	+	#if DEBUG
1458	+	printf(" Instruction %d: 0x%016llx\n", slot, inst);
1459	+	#endif
1460	+	return inst;
1461	+	}
1462	+
1463	+	// Decode group 0 instructions
1464	+	static bool ia64_decode_instruction_0(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1465	+	{
1466	+	const int r1 = (inst->inst >> 6) & 0x7f;
1467	+	const int r3 = (inst->inst >> 20) & 0x7f;
1468	+
1469	+	const int x3 = (inst->inst >> 33) & 0x07;
1470	+	const int x6 = (inst->inst >> 27) & 0x3f;
1471	+	const int x2 = (inst->inst >> 31) & 0x03;
1472	+	const int x4 = (inst->inst >> 27) & 0x0f;
1473	+
1474	+	if (x3 == 0) {
1475	+	switch (x6) {
1476	+	case 0x01: // nop.i (I19)
1477	+	inst->mnemo = IA64_INST_NOP;
1478	+	inst->operands[0].valid = true;
1479	+	inst->operands[0].index = -1;
1480	+	inst->operands[0].value = ia64_inst_get_imm21(inst->inst);
1481	+	return true;
1482	+	case 0x14: // sxt1 (I29)
1483	+	case 0x15: // sxt2 (I29)
1484	+	case 0x16: // sxt4 (I29)
1485	+	case 0x10: // zxt1 (I29)
1486	+	case 0x11: // zxt2 (I29)
1487	+	case 0x12: // zxt4 (I29)
1488	+	switch (x6) {
1489	+	case 0x14: inst->mnemo = IA64_INST_SXT1; break;
1490	+	case 0x15: inst->mnemo = IA64_INST_SXT2; break;
1491	+	case 0x16: inst->mnemo = IA64_INST_SXT4; break;
1492	+	case 0x10: inst->mnemo = IA64_INST_ZXT1; break;
1493	+	case 0x11: inst->mnemo = IA64_INST_ZXT2; break;
1494	+	case 0x12: inst->mnemo = IA64_INST_ZXT4; break;
1495	+	default: abort();
1496	+	}
1497	+	inst->operands[0].valid = true;
1498	+	inst->operands[0].index = r1;
1499	+	inst->operands[1].valid = true;
1500	+	inst->operands[1].index = r3;
1501	+	inst->operands[1].value = IA64_GET_GR(r3);
1502	+	inst->operands[1].nat = IA64_GET_NAT(r3);
1503	+	return true;
1504	+	}
1505	+	}
1506	+	return false;
1507	+	}
1508	+
1509	+	// Decode group 4 instructions (load/store instructions)
1510	+	static bool ia64_decode_instruction_4(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1511	+	{
1512	+	const int r1 = (inst->inst >> 6) & 0x7f;
1513	+	const int r2 = (inst->inst >> 13) & 0x7f;
1514	+	const int r3 = (inst->inst >> 20) & 0x7f;
1515	+
1516	+	const int m = (inst->inst >> 36) & 1;
1517	+	const int x = (inst->inst >> 27) & 1;
1518	+	const int x6 = (inst->inst >> 30) & 0x3f;
1519	+
1520	+	switch (x6) {
1521	+	case 0x00:
1522	+	case 0x01:
1523	+	case 0x02:
1524	+	case 0x03:
1525	+	if (x == 0) {
1526	+	inst->operands[0].valid = true;
1527	+	inst->operands[0].index = r1;
1528	+	inst->operands[1].valid = true;
1529	+	inst->operands[1].index = r3;
1530	+	inst->operands[1].value = IA64_GET_GR(r3);
1531	+	inst->operands[1].nat = IA64_GET_NAT(r3);
1532	+	if (m == 0) {
1533	+	switch (x6) {
1534	+	case 0x00: inst->mnemo = IA64_INST_LD1; break;
1535	+	case 0x01: inst->mnemo = IA64_INST_LD2; break;
1536	+	case 0x02: inst->mnemo = IA64_INST_LD4; break;
1537	+	case 0x03: inst->mnemo = IA64_INST_LD8; break;
1538	+	}
1539	+	}
1540	+	else {
1541	+	inst->operands[2].valid = true;
1542	+	inst->operands[2].index = r2;
1543	+	inst->operands[2].value = IA64_GET_GR(r2);
1544	+	inst->operands[2].nat = IA64_GET_NAT(r2);
1545	+	switch (x6) {
1546	+	case 0x00: inst->mnemo = IA64_INST_LD1_UPDATE; break;
1547	+	case 0x01: inst->mnemo = IA64_INST_LD2_UPDATE; break;
1548	+	case 0x02: inst->mnemo = IA64_INST_LD4_UPDATE; break;
1549	+	case 0x03: inst->mnemo = IA64_INST_LD8_UPDATE; break;
1550	+	}
1551	+	}
1552	+	return true;
1553	+	}
1554	+	break;
1555	+	case 0x30:
1556	+	case 0x31:
1557	+	case 0x32:
1558	+	case 0x33:
1559	+	if (m == 0 && x == 0) {
1560	+	inst->operands[0].valid = true;
1561	+	inst->operands[0].index = r3;
1562	+	inst->operands[0].value = IA64_GET_GR(r3);
1563	+	inst->operands[0].nat = IA64_GET_NAT(r3);
1564	+	inst->operands[1].valid = true;
1565	+	inst->operands[1].index = r2;
1566	+	inst->operands[1].value = IA64_GET_GR(r2);
1567	+	inst->operands[1].nat = IA64_GET_NAT(r2);
1568	+	switch (x6) {
1569	+	case 0x30: inst->mnemo = IA64_INST_ST1; break;
1570	+	case 0x31: inst->mnemo = IA64_INST_ST2; break;
1571	+	case 0x32: inst->mnemo = IA64_INST_ST4; break;
1572	+	case 0x33: inst->mnemo = IA64_INST_ST8; break;
1573	+	}
1574	+	return true;
1575	+	}
1576	+	break;
1577	+	}
1578	+	return false;
1579	+	}
1580	+
1581	+	// Decode group 5 instructions (load/store instructions)
1582	+	static bool ia64_decode_instruction_5(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1583	+	{
1584	+	const int r1 = (inst->inst >> 6) & 0x7f;
1585	+	const int r2 = (inst->inst >> 13) & 0x7f;
1586	+	const int r3 = (inst->inst >> 20) & 0x7f;
1587	+
1588	+	const int x6 = (inst->inst >> 30) & 0x3f;
1589	+
1590	+	switch (x6) {
1591	+	case 0x00:
1592	+	case 0x01:
1593	+	case 0x02:
1594	+	case 0x03:
1595	+	inst->operands[0].valid = true;
1596	+	inst->operands[0].index = r1;
1597	+	inst->operands[1].valid = true;
1598	+	inst->operands[1].index = r3;
1599	+	inst->operands[1].value = IA64_GET_GR(r3);
1600	+	inst->operands[1].nat = IA64_GET_NAT(r3);
1601	+	inst->operands[2].valid = true;
1602	+	inst->operands[2].index = -1;
1603	+	inst->operands[2].value = ia64_inst_get_imm9b(inst->inst);
1604	+	inst->operands[2].nat = 0;
1605	+	switch (x6) {
1606	+	case 0x00: inst->mnemo = IA64_INST_LD1_UPDATE; break;
1607	+	case 0x01: inst->mnemo = IA64_INST_LD2_UPDATE; break;
1608	+	case 0x02: inst->mnemo = IA64_INST_LD4_UPDATE; break;
1609	+	case 0x03: inst->mnemo = IA64_INST_LD8_UPDATE; break;
1610	+	}
1611	+	return true;
1612	+	case 0x30:
1613	+	case 0x31:
1614	+	case 0x32:
1615	+	case 0x33:
1616	+	inst->operands[0].valid = true;
1617	+	inst->operands[0].index = r3;
1618	+	inst->operands[0].value = IA64_GET_GR(r3);
1619	+	inst->operands[0].nat = IA64_GET_NAT(r3);
1620	+	inst->operands[1].valid = true;
1621	+	inst->operands[1].index = r2;
1622	+	inst->operands[1].value = IA64_GET_GR(r2);
1623	+	inst->operands[1].nat = IA64_GET_NAT(r2);
1624	+	inst->operands[2].valid = true;
1625	+	inst->operands[2].index = -1;
1626	+	inst->operands[2].value = ia64_inst_get_imm9a(inst->inst);
1627	+	inst->operands[2].nat = 0;
1628	+	switch (x6) {
1629	+	case 0x30: inst->mnemo = IA64_INST_ST1_UPDATE; break;
1630	+	case 0x31: inst->mnemo = IA64_INST_ST2_UPDATE; break;
1631	+	case 0x32: inst->mnemo = IA64_INST_ST4_UPDATE; break;
1632	+	case 0x33: inst->mnemo = IA64_INST_ST8_UPDATE; break;
1633	+	}
1634	+	return true;
1635	+	}
1636	+	return false;
1637	+	}
1638	+
1639	+	// Decode group 8 instructions (ALU integer)
1640	+	static bool ia64_decode_instruction_8(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1641	+	{
1642	+	const int r1 = (inst->inst >> 6) & 0x7f;
1643	+	const int r2 = (inst->inst >> 13) & 0x7f;
1644	+	const int r3 = (inst->inst >> 20) & 0x7f;
1645	+
1646	+	const int x2a = (inst->inst >> 34) & 0x3;
1647	+	const int x2b = (inst->inst >> 27) & 0x3;
1648	+	const int x4 = (inst->inst >> 29) & 0xf;
1649	+	const int ve = (inst->inst >> 33) & 0x1;
1650	+
1651	+	// destination register (r1) is always valid in this group
1652	+	inst->operands[0].valid = true;
1653	+	inst->operands[0].index = r1;
1654	+
1655	+	// source register (r3) is always valid in this group
1656	+	inst->operands[2].valid = true;
1657	+	inst->operands[2].index = r3;
1658	+	inst->operands[2].value = IA64_GET_GR(r3);
1659	+	inst->operands[2].nat = IA64_GET_NAT(r3);
1660	+
1661	+	if (x2a == 0 && ve == 0) {
1662	+	inst->operands[1].valid = true;
1663	+	inst->operands[1].index = r2;
1664	+	inst->operands[1].value = IA64_GET_GR(r2);
1665	+	inst->operands[1].nat = IA64_GET_NAT(r2);
1666	+	switch (x4) {
1667	+	case 0x0: // add (A1)
1668	+	inst->mnemo = IA64_INST_ADD;
1669	+	inst->operands[3].valid = true;
1670	+	inst->operands[3].index = -1;
1671	+	inst->operands[3].value = x2b == 1;
1672	+	return true;
1673	+	case 0x1: // add (A1)
1674	+	inst->mnemo = IA64_INST_SUB;
1675	+	inst->operands[3].valid = true;
1676	+	inst->operands[3].index = -1;
1677	+	inst->operands[3].value = x2b == 0;
1678	+	return true;
1679	+	case 0x4: // shladd (A2)
1680	+	inst->mnemo = IA64_INST_SHLADD;
1681	+	inst->operands[3].valid = true;
1682	+	inst->operands[3].index = -1;
1683	+	inst->operands[3].value = ia64_inst_get_count2(inst->inst);
1684	+	return true;
1685	+	case 0x9:
1686	+	if (x2b == 1) {
1687	+	inst->mnemo = IA64_INST_SUB;
1688	+	inst->operands[1].index = -1;
1689	+	inst->operands[1].value = ia64_inst_get_imm8(inst->inst);
1690	+	inst->operands[1].nat = 0;
1691	+	return true;
1692	+	}
1693	+	break;
1694	+	case 0xb:
1695	+	inst->operands[1].index = -1;
1696	+	inst->operands[1].value = ia64_inst_get_imm8(inst->inst);
1697	+	inst->operands[1].nat = 0;
1698	+	// fall-through
1699	+	case 0x3:
1700	+	switch (x2b) {
1701	+	case 0: inst->mnemo = IA64_INST_AND; break;
1702	+	case 1: inst->mnemo = IA64_INST_ANDCM; break;
1703	+	case 2: inst->mnemo = IA64_INST_OR; break;
1704	+	case 3: inst->mnemo = IA64_INST_XOR; break;
1705	+	}
1706	+	return true;
1707	+	}
1708	+	}
1709	+	return false;
1710	+	}
1711	+
1712	+	// Decode instruction
1713	+	static bool ia64_decode_instruction(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1714	+	{
1715	+	const int major = (inst->inst >> 37) & 0xf;
1716	+
1717	+	inst->mnemo = IA64_INST_UNKNOWN;
1718	+	inst->pred = inst->inst & 0x3f;
1719	+	memset(&inst->operands[0], 0, sizeof(inst->operands));
1720	+
1721	+	switch (major) {
1722	+	case 0x0: return ia64_decode_instruction_0(inst, IA64_CONTEXT);
1723	+	case 0x4: return ia64_decode_instruction_4(inst, IA64_CONTEXT);
1724	+	case 0x5: return ia64_decode_instruction_5(inst, IA64_CONTEXT);
1725	+	case 0x8: return ia64_decode_instruction_8(inst, IA64_CONTEXT);
1726	+	}
1727	+	return false;
1728	+	}
1729	+
1730	+	static bool ia64_emulate_instruction(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1731	+	{
1732	+	// XXX: handle Register NaT Consumption fault?
1733	+	// XXX: this simple emulator assumes instructions in a bundle
1734	+	// don't depend on effects of other instructions in the same
1735	+	// bundle. It probably would be simpler to JIT-generate code to be
1736	+	// executed natively but probably more costly (inject/extract CPU state)
1737	+	if (inst->mnemo == IA64_INST_UNKNOWN)
1738	+	return false;
1739	+	if (inst->pred && !IA64_GET_PR(inst->pred))
1740	+	return true;
1741	+
1742	+	uint8_t nat, nat2;
1743	+	uint64_t dst, dst2, src1, src2, src3;
1744	+
1745	+	switch (inst->mnemo) {
1746	+	case IA64_INST_NOP:
1747	+	break;
1748	+	case IA64_INST_ADD:
1749	+	case IA64_INST_SUB:
1750	+	case IA64_INST_SHLADD:
1751	+	src3 = inst->operands[3].value;
1752	+	// fall-through
1753	+	case IA64_INST_AND:
1754	+	case IA64_INST_ANDCM:
1755	+	case IA64_INST_OR:
1756	+	case IA64_INST_XOR:
1757	+	src1 = inst->operands[1].value;
1758	+	src2 = inst->operands[2].value;
1759	+	switch (inst->mnemo) {
1760	+	case IA64_INST_ADD: dst = src1 + src2 + src3; break;
1761	+	case IA64_INST_SUB: dst = src1 - src2 - src3; break;
1762	+	case IA64_INST_SHLADD: dst = (src1 << src3) + src2; break;
1763	+	case IA64_INST_AND: dst = src1 & src2; break;
1764	+	case IA64_INST_ANDCM: dst = src1 &~ src2; break;
1765	+	case IA64_INST_OR: dst = src1 \| src2; break;
1766	+	case IA64_INST_XOR: dst = src1 ^ src2; break;
1767	+	}
1768	+	inst->operands[0].commit = true;
1769	+	inst->operands[0].value = dst;
1770	+	inst->operands[0].nat = inst->operands[1].nat \| inst->operands[2].nat;
1771	+	break;
1772	+	case IA64_INST_SXT1:
1773	+	case IA64_INST_SXT2:
1774	+	case IA64_INST_SXT4:
1775	+	case IA64_INST_ZXT1:
1776	+	case IA64_INST_ZXT2:
1777	+	case IA64_INST_ZXT4:
1778	+	src1 = inst->operands[1].value;
1779	+	switch (inst->mnemo) {
1780	+	case IA64_INST_SXT1: dst = (int64_t)(int8_t)src1; break;
1781	+	case IA64_INST_SXT2: dst = (int64_t)(int16_t)src1; break;
1782	+	case IA64_INST_SXT4: dst = (int64_t)(int32_t)src1; break;
1783	+	case IA64_INST_ZXT1: dst = (uint8_t)src1; break;
1784	+	case IA64_INST_ZXT2: dst = (uint16_t)src1; break;
1785	+	case IA64_INST_ZXT4: dst = (uint32_t)src1; break;
1786	+	}
1787	+	inst->operands[0].commit = true;
1788	+	inst->operands[0].value = dst;
1789	+	inst->operands[0].nat = inst->operands[1].nat;
1790	+	break;
1791	+	case IA64_INST_LD1_UPDATE:
1792	+	case IA64_INST_LD2_UPDATE:
1793	+	case IA64_INST_LD4_UPDATE:
1794	+	case IA64_INST_LD8_UPDATE:
1795	+	inst->operands[1].commit = true;
1796	+	dst2 = inst->operands[1].value + inst->operands[2].value;
1797	+	nat2 = inst->operands[2].nat ? inst->operands[2].nat : 0;
1798	+	// fall-through
1799	+	case IA64_INST_LD1:
1800	+	case IA64_INST_LD2:
1801	+	case IA64_INST_LD4:
1802	+	case IA64_INST_LD8:
1803	+	src1 = inst->operands[1].value;
1804	+	if (inst->no_memory)
1805	+	dst = 0;
1806	+	else {
1807	+	switch (inst->mnemo) {
1808	+	case IA64_INST_LD1: case IA64_INST_LD1_UPDATE: dst = ((uint8_t )src1); break;
1809	+	case IA64_INST_LD2: case IA64_INST_LD2_UPDATE: dst = ((uint16_t )src1); break;
1810	+	case IA64_INST_LD4: case IA64_INST_LD4_UPDATE: dst = ((uint32_t )src1); break;
1811	+	case IA64_INST_LD8: case IA64_INST_LD8_UPDATE: dst = ((uint64_t )src1); break;
1812	+	}
1813	+	}
1814	+	inst->operands[0].commit = true;
1815	+	inst->operands[0].value = dst;
1816	+	inst->operands[0].nat = 0;
1817	+	inst->operands[1].value = dst2;
1818	+	inst->operands[1].nat = nat2;
1819	+	break;
1820	+	case IA64_INST_ST1_UPDATE:
1821	+	case IA64_INST_ST2_UPDATE:
1822	+	case IA64_INST_ST4_UPDATE:
1823	+	case IA64_INST_ST8_UPDATE:
1824	+	inst->operands[0].commit = 0;
1825	+	dst2 = inst->operands[0].value + inst->operands[2].value;
1826	+	nat2 = inst->operands[2].nat ? inst->operands[2].nat : 0;
1827	+	// fall-through
1828	+	case IA64_INST_ST1:
1829	+	case IA64_INST_ST2:
1830	+	case IA64_INST_ST4:
1831	+	case IA64_INST_ST8:
1832	+	dst = inst->operands[0].value;
1833	+	src1 = inst->operands[1].value;
1834	+	if (!inst->no_memory) {
1835	+	switch (inst->mnemo) {
1836	+	case IA64_INST_ST1: case IA64_INST_ST1_UPDATE: ((uint8_t )dst) = src1; break;
1837	+	case IA64_INST_ST2: case IA64_INST_ST2_UPDATE: ((uint16_t )dst) = src1; break;
1838	+	case IA64_INST_ST4: case IA64_INST_ST4_UPDATE: ((uint32_t )dst) = src1; break;
1839	+	case IA64_INST_ST8: case IA64_INST_ST8_UPDATE: ((uint64_t )dst) = src1; break;
1840	+	}
1841	+	}
1842	+	inst->operands[0].value = dst2;
1843	+	inst->operands[0].nat = nat2;
1844	+	break;
1845	+	default:
1846	+	return false;
1847	+	}
1848	+
1849	+	for (int i = 0; i < IA64_N_OPERANDS; i++) {
1850	+	ia64_operand_t const & op = inst->operands[i];
1851	+	if (!op.commit)
1852	+	continue;
1853	+	if (op.index == -1)
1854	+	return false; // XXX: internal error
1855	+	IA64_SET_GR(op.index, op.value, op.nat);
1856	+	}
1857	+	return true;
1858	+	}
1859	+
1860	+	static bool ia64_emulate_instruction(uint64_t raw_inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1861	+	{
1862	+	ia64_instruction_t inst;
1863	+	memset(&inst, 0, sizeof(inst));
1864	+	inst.inst = raw_inst;
1865	+	if (!ia64_decode_instruction(&inst, IA64_CONTEXT))
1866	+	return false;
1867	+	return ia64_emulate_instruction(&inst, IA64_CONTEXT);
1868	+	}
1869	+
1870	+	static bool ia64_skip_instruction(IA64_CONTEXT_TYPE IA64_CONTEXT)
1871	+	{
1872	+	uint64_t ip = IA64_GET_IP();
1873	+	#if DEBUG
1874	+	printf("IP: 0x%016llx\n", ip);
1875	+	#if 0
1876	+	printf(" Template 0x%02x\n", ia64_get_template(ip));
1877	+	ia64_get_instruction(ip, 0);
1878	+	ia64_get_instruction(ip, 1);
1879	+	ia64_get_instruction(ip, 2);
1880	+	#endif
1881	+	#endif
1882	+
1883	+	// Select which decode switch to use
1884	+	ia64_instruction_t inst;
1885	+	inst.inst = ia64_get_instruction(ip, ip & 3);
1886	+	if (!ia64_decode_instruction(&inst, IA64_CONTEXT)) {
1887	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): could not decode instruction\n");
1888	+	return false;
1889	+	}
1890	+
1891	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1892	+	transfer_size_t transfer_size = SIZE_UNKNOWN;
1893	+
1894	+	switch (inst.mnemo) {
1895	+	case IA64_INST_LD1:
1896	+	case IA64_INST_LD2:
1897	+	case IA64_INST_LD4:
1898	+	case IA64_INST_LD8:
1899	+	case IA64_INST_LD1_UPDATE:
1900	+	case IA64_INST_LD2_UPDATE:
1901	+	case IA64_INST_LD4_UPDATE:
1902	+	case IA64_INST_LD8_UPDATE:
1903	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1904	+	break;
1905	+	case IA64_INST_ST1:
1906	+	case IA64_INST_ST2:
1907	+	case IA64_INST_ST4:
1908	+	case IA64_INST_ST8:
1909	+	case IA64_INST_ST1_UPDATE:
1910	+	case IA64_INST_ST2_UPDATE:
1911	+	case IA64_INST_ST4_UPDATE:
1912	+	case IA64_INST_ST8_UPDATE:
1913	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1914	+	break;
1915	+	}
1916	+
1917	+	if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1918	+	// Unknown machine code, let it crash. Then patch the decoder
1919	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): not a load/store instruction\n");
1920	+	return false;
1921	+	}
1922	+
1923	+	switch (inst.mnemo) {
1924	+	case IA64_INST_LD1:
1925	+	case IA64_INST_LD1_UPDATE:
1926	+	case IA64_INST_ST1:
1927	+	case IA64_INST_ST1_UPDATE:
1928	+	transfer_size = SIZE_BYTE;
1929	+	break;
1930	+	case IA64_INST_LD2:
1931	+	case IA64_INST_LD2_UPDATE:
1932	+	case IA64_INST_ST2:
1933	+	case IA64_INST_ST2_UPDATE:
1934	+	transfer_size = SIZE_WORD;
1935	+	break;
1936	+	case IA64_INST_LD4:
1937	+	case IA64_INST_LD4_UPDATE:
1938	+	case IA64_INST_ST4:
1939	+	case IA64_INST_ST4_UPDATE:
1940	+	transfer_size = SIZE_LONG;
1941	+	break;
1942	+	case IA64_INST_LD8:
1943	+	case IA64_INST_LD8_UPDATE:
1944	+	case IA64_INST_ST8:
1945	+	case IA64_INST_ST8_UPDATE:
1946	+	transfer_size = SIZE_QUAD;
1947	+	break;
1948	+	}
1949	+
1950	+	if (transfer_size == SIZE_UNKNOWN) {
1951	+	// Unknown machine code, let it crash. Then patch the decoder
1952	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): unknown transfer size\n");
1953	+	return false;
1954	+	}
1955	+
1956	+	inst.no_memory = true;
1957	+	if (!ia64_emulate_instruction(&inst, IA64_CONTEXT)) {
1958	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): could not emulate fault instruction\n");
1959	+	return false;
1960	+	}
1961	+
1962	+	int slot = ip & 3;
1963	+	bool emulate_next = false;
1964	+	switch (slot) {
1965	+	case 0:
1966	+	switch (ia64_get_template(ip)) {
1967	+	case 0x2: // MI;I
1968	+	case 0x3: // MI;I;
1969	+	emulate_next = true;
1970	+	slot = 2;
1971	+	break;
1972	+	case 0xa: // M;MI
1973	+	case 0xb: // M;MI;
1974	+	emulate_next = true;
1975	+	slot = 1;
1976	+	break;
1977	+	}
1978	+	break;
1979	+	}
1980	+	if (emulate_next && !IA64_CAN_PATCH_IP_SLOT) {
1981	+	while (slot < 3) {
1982	+	if (!ia64_emulate_instruction(ia64_get_instruction(ip, slot), IA64_CONTEXT)) {
1983	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): could not emulate instruction\n");
1984	+	return false;
1985	+	}
1986	+	++slot;
1987	+	}
1988	+	}
1989	+
1990	+	#if IA64_CAN_PATCH_IP_SLOT
1991	+	if ((slot = ip & 3) < 2)
1992	+	IA64_SET_IP((ip & ~3ull) + (slot + 1));
1993	+	else
1994	+	#endif
1995	+	IA64_SET_IP((ip & ~3ull) + 16);
1996	+	#if DEBUG
1997	+	printf("IP: 0x%016llx\n", IA64_GET_IP());
1998	+	#endif
1999	+	return true;
2000	+	}
2001	+	#endif
2002	+
2003		// Decode and skip PPC instruction
2004	<	#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__))
2004	>	#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__) \|\| defined(__ppc64__))
2005		static bool powerpc_skip_instruction(unsigned long * nip_p, unsigned long * regs)
2006		{
2007		instruction_t instr;
#	Line 1019 \| Line 2037 \| static bool powerpc_skip_instruction(uns
2037
2038		// Decode and skip MIPS instruction
2039		#if (defined(mips) \|\| defined(__mips))
2040	<	enum {
1023	<	#if (defined(sgi) \|\| defined(__sgi))
1024	<	MIPS_REG_EPC = 35,
1025	<	#endif
1026	<	};
1027	<	static bool mips_skip_instruction(greg_t * regs)
2040	>	static bool mips_skip_instruction(greg_t * pc_p, greg_t * regs)
2041		{
2042	<	unsigned int * epc = (unsigned int *)(unsigned long)regs[MIPS_REG_EPC];
2042	>	unsigned int * epc = (unsigned int )(unsigned long)pc_p;
2043
2044		if (epc == 0)
2045		return false;
#	Line 1175 \| Line 2188 \| static bool mips_skip_instruction(greg_t
2188		mips_gpr_names[reg]);
2189		#endif
2190
2191	<	regs[MIPS_REG_EPC] += 4;
2191	>	*pc_p += 4;
2192		return true;
2193		}
2194		#endif
#	Line 1187 \| Line 2200 \| enum {
2200		SPARC_REG_G1 = REG_G1,
2201		SPARC_REG_O0 = REG_O0,
2202		SPARC_REG_PC = REG_PC,
2203	+	SPARC_REG_nPC = REG_nPC
2204		#endif
2205		};
2206		static bool sparc_skip_instruction(unsigned long * regs, gwindows_t * gwins, struct rwindow * rwin)
#	Line 1250 \| Line 2264 \| static bool sparc_skip_instruction(unsig
2264		break;
2265		case 7: // Store Doubleword
2266		transfer_type = SIGSEGV_TRANSFER_STORE;
2267	<	transfer_size = SIZE_WORD;
2267	>	transfer_size = SIZE_LONG;
2268		register_pair = true;
2269		break;
2270		}
#	Line 1260 \| Line 2274 \| static bool sparc_skip_instruction(unsig
2274		return false;
2275		}
2276
1263	–	// Zero target register in case of a load operation
2277		const int reg = (opcode >> 25) & 0x1f;
2278	+
2279	+	#if DEBUG
2280	+	static const char * reg_names[] = {
2281	+	"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
2282	+	"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
2283	+	"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
2284	+	"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7"
2285	+	};
2286	+	printf("%s %s register %s\n",
2287	+	transfer_size == SIZE_BYTE ? "byte" :
2288	+	transfer_size == SIZE_WORD ? "word" :
2289	+	transfer_size == SIZE_LONG ? "long" :
2290	+	transfer_size == SIZE_QUAD ? "quad" : "unknown",
2291	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
2292	+	reg_names[reg]);
2293	+	#endif
2294	+
2295	+	// Zero target register in case of a load operation
2296		if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != 0) {
2297		// FIXME: code to handle local & input registers is not tested
2298	<	if (reg >= 1 && reg <= 7) {
2298	>	if (reg >= 1 && reg < 8) {
2299		// global registers
2300		regs[reg - 1 + SPARC_REG_G1] = 0;
2301		}
2302	<	else if (reg >= 8 && reg <= 15) {
2302	>	else if (reg >= 8 && reg < 16) {
2303		// output registers
2304		regs[reg - 8 + SPARC_REG_O0] = 0;
2305		}
2306	<	else if (reg >= 16 && reg <= 23) {
2306	>	else if (reg >= 16 && reg < 24) {
2307		// local registers (in register windows)
2308		if (gwins)
2309		gwins->wbuf->rw_local[reg - 16] = 0;
#	Line 1288 \| Line 2319 \| static bool sparc_skip_instruction(unsig
2319		}
2320		}
2321
1291	–	#if DEBUG
1292	–	static const char * reg_names[] = {
1293	–	"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
1294	–	"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
1295	–	"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
1296	–	"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7"
1297	–	};
1298	–	printf("%s %s register %s\n",
1299	–	transfer_size == SIZE_BYTE ? "byte" :
1300	–	transfer_size == SIZE_WORD ? "word" :
1301	–	transfer_size == SIZE_LONG ? "long" :
1302	–	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1303	–	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1304	–	reg_names[reg]);
1305	–	#endif
1306	–
2322		regs[SPARC_REG_PC] += 4;
2323	+	regs[SPARC_REG_nPC] += 4;
2324		return true;
2325		}
2326		#endif
#	Line 1460 \| Line 2476 \| static bool arm_skip_instruction(unsigne
2476
2477
2478		// Fallbacks
2479	+	#ifndef SIGSEGV_FAULT_ADDRESS_FAST
2480	+	#define SIGSEGV_FAULT_ADDRESS_FAST SIGSEGV_FAULT_ADDRESS
2481	+	#endif
2482	+	#ifndef SIGSEGV_FAULT_INSTRUCTION_FAST
2483	+	#define SIGSEGV_FAULT_INSTRUCTION_FAST SIGSEGV_FAULT_INSTRUCTION
2484	+	#endif
2485		#ifndef SIGSEGV_FAULT_INSTRUCTION
2486	<	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_INVALID_PC
2486	>	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_INVALID_ADDRESS
2487		#endif
2488		#ifndef SIGSEGV_FAULT_HANDLER_ARGLIST_1
2489		#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 SIGSEGV_FAULT_HANDLER_ARGLIST
2490		#endif
2491		#ifndef SIGSEGV_FAULT_HANDLER_INVOKE
2492	<	#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP) sigsegv_fault_handler(ADDR, IP)
2492	>	#define SIGSEGV_FAULT_HANDLER_INVOKE(P) sigsegv_fault_handler(P)
2493		#endif
2494
2495		// SIGSEGV recovery supported ?
#	Line 1480 \| Line 2502 \| static bool arm_skip_instruction(unsigne
2502		* SIGSEGV global handler
2503		*/
2504
2505	+	#ifdef HAVE_MACH_EXCEPTIONS
2506	+	static void mach_get_exception_state(sigsegv_info_t *SIP)
2507	+	{
2508	+	SIP->exc_state_count = SIGSEGV_EXCEPTION_STATE_COUNT;
2509	+	kern_return_t krc = thread_get_state(SIP->thread,
2510	+	SIGSEGV_EXCEPTION_STATE_FLAVOR,
2511	+	(natural_t *)&SIP->exc_state,
2512	+	&SIP->exc_state_count);
2513	+	MACH_CHECK_ERROR(thread_get_state, krc);
2514	+	SIP->has_exc_state = true;
2515	+	}
2516	+
2517	+	static void mach_get_thread_state(sigsegv_info_t *SIP)
2518	+	{
2519	+	SIP->thr_state_count = SIGSEGV_THREAD_STATE_COUNT;
2520	+	kern_return_t krc = thread_get_state(SIP->thread,
2521	+	SIGSEGV_THREAD_STATE_FLAVOR,
2522	+	(natural_t *)&SIP->thr_state,
2523	+	&SIP->thr_state_count);
2524	+	MACH_CHECK_ERROR(thread_get_state, krc);
2525	+	SIP->has_thr_state = true;
2526	+	}
2527	+
2528	+	static void mach_set_thread_state(sigsegv_info_t *SIP)
2529	+	{
2530	+	kern_return_t krc = thread_set_state(SIP->thread,
2531	+	SIGSEGV_THREAD_STATE_FLAVOR,
2532	+	(natural_t *)&SIP->thr_state,
2533	+	SIP->thr_state_count);
2534	+	MACH_CHECK_ERROR(thread_set_state, krc);
2535	+	}
2536	+	#endif
2537	+
2538	+	// Return the address of the invalid memory reference
2539	+	sigsegv_address_t sigsegv_get_fault_address(sigsegv_info_t *SIP)
2540	+	{
2541	+	#ifdef HAVE_MACH_EXCEPTIONS
2542	+	#ifdef EMULATED_PPC
2543	+	static int use_fast_path = -1;
2544	+	if (use_fast_path != 1 && !SIP->has_exc_state) {
2545	+	mach_get_exception_state(SIP);
2546	+
2547	+	sigsegv_address_t addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
2548	+	if (use_fast_path < 0) {
2549	+	const char *machfault = getenv("SIGSEGV_MACH_FAULT");
2550	+	if (machfault) {
2551	+	if (strcmp(machfault, "fast") == 0)
2552	+	use_fast_path = 1;
2553	+	else if (strcmp(machfault, "slow") == 0)
2554	+	use_fast_path = 0;
2555	+	}
2556	+	if (use_fast_path < 0)
2557	+	use_fast_path = addr == SIP->addr;
2558	+	}
2559	+	SIP->addr = addr;
2560	+	}
2561	+	#endif
2562	+	#endif
2563	+	return SIP->addr;
2564	+	}
2565	+
2566	+	// Return the address of the instruction that caused the fault, or
2567	+	// SIGSEGV_INVALID_ADDRESS if we could not retrieve this information
2568	+	sigsegv_address_t sigsegv_get_fault_instruction_address(sigsegv_info_t *SIP)
2569	+	{
2570	+	#ifdef HAVE_MACH_EXCEPTIONS
2571	+	#ifdef EMULATED_PPC
2572	+	if (!SIP->has_thr_state) {
2573	+	mach_get_thread_state(SIP);
2574	+
2575	+	SIP->pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
2576	+	}
2577	+	#endif
2578	+	#endif
2579	+	return SIP->pc;
2580	+	}
2581	+
2582		// This function handles the badaccess to memory.
2583		// It is called from the signal handler or the exception handler.
2584		static bool handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGLIST_1)
2585		{
2586	<	sigsegv_address_t fault_address = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
2587	<	sigsegv_address_t fault_instruction = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
2588	<
2586	>	sigsegv_info_t SI;
2587	>	SI.addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS_FAST;
2588	>	SI.pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION_FAST;
2589	>	#ifdef HAVE_MACH_EXCEPTIONS
2590	>	SI.thread = thread;
2591	>	SI.has_exc_state = false;
2592	>	SI.has_thr_state = false;
2593	>	#endif
2594	>	sigsegv_info_t * const SIP = &SI;
2595	>
2596		// Call user's handler and reinstall the global handler, if required
2597	<	switch (SIGSEGV_FAULT_HANDLER_INVOKE(fault_address, fault_instruction)) {
2597	>	switch (SIGSEGV_FAULT_HANDLER_INVOKE(SIP)) {
2598		case SIGSEGV_RETURN_SUCCESS:
2599		return true;
2600
#	Line 1496 \| Line 2602 \| static bool handle_badaccess(SIGSEGV_FAU
2602		case SIGSEGV_RETURN_SKIP_INSTRUCTION:
2603		// Call the instruction skipper with the register file
2604		// available
2605	+	#ifdef HAVE_MACH_EXCEPTIONS
2606	+	if (!SIP->has_thr_state)
2607	+	mach_get_thread_state(SIP);
2608	+	#endif
2609		if (SIGSEGV_SKIP_INSTRUCTION(SIGSEGV_REGISTER_FILE)) {
2610		#ifdef HAVE_MACH_EXCEPTIONS
2611		// Unlike UNIX signals where the thread state
2612		// is modified off of the stack, in Mach we
2613		// need to actually call thread_set_state to
2614		// have the register values updated.
2615	<	kern_return_t krc;
1506	<
1507	<	krc = thread_set_state(thread,
1508	<	MACHINE_THREAD_STATE, (thread_state_t)state,
1509	<	MACHINE_THREAD_STATE_COUNT);
1510	<	MACH_CHECK_ERROR (thread_get_state, krc);
2615	>	mach_set_thread_state(SIP);
2616		#endif
2617		return true;
2618		}
2619		break;
2620		#endif
2621		case SIGSEGV_RETURN_FAILURE:
2622	<	return false;
2622	>	// We can't do anything with the fault_address, dump state?
2623	>	if (sigsegv_state_dumper != 0)
2624	>	sigsegv_state_dumper(SIP);
2625	>	break;
2626		}
1519	–
1520	–	// We can't do anything with the fault_address, dump state?
1521	–	if (sigsegv_state_dumper != 0)
1522	–	sigsegv_state_dumper(fault_address, fault_instruction);
2627
2628		return false;
2629		}
#	Line 1550 \| Line 2654 \| static inline kern_return_t
2654		forward_exception(mach_port_t thread_port,
2655		mach_port_t task_port,
2656		exception_type_t exception_type,
2657	<	exception_data_t exception_data,
2657	>	mach_exception_data_t exception_data,
2658		mach_msg_type_number_t data_count,
2659		ExceptionPorts *oldExceptionPorts)
2660		{
#	Line 1559 \| Line 2663 \| forward_exception(mach_port_t thread_por
2663		mach_port_t port;
2664		exception_behavior_t behavior;
2665		thread_state_flavor_t flavor;
2666	<	thread_state_t thread_state;
2666	>	thread_state_data_t thread_state;
2667		mach_msg_type_number_t thread_state_count;
2668
2669		for (portIndex = 0; portIndex < oldExceptionPorts->maskCount; portIndex++) {
#	Line 1578 \| Line 2682 \| forward_exception(mach_port_t thread_por
2682		behavior = oldExceptionPorts->behaviors[portIndex];
2683		flavor = oldExceptionPorts->flavors[portIndex];
2684
2685	+	if (!VALID_THREAD_STATE_FLAVOR(flavor)) {
2686	+	fprintf(stderr, "Invalid thread_state flavor = %d. Not forwarding\n", flavor);
2687	+	return KERN_FAILURE;
2688	+	}
2689	+
2690		/*
2691		fprintf(stderr, "forwarding exception, port = 0x%x, behaviour = %d, flavor = %d\n", port, behavior, flavor);
2692		*/
2693
2694		if (behavior != EXCEPTION_DEFAULT) {
2695		thread_state_count = THREAD_STATE_MAX;
2696	<	kret = thread_get_state (thread_port, flavor, thread_state,
2696	>	kret = thread_get_state (thread_port, flavor, (natural_t *)&thread_state,
2697		&thread_state_count);
2698		MACH_CHECK_ERROR (thread_get_state, kret);
2699		}
#	Line 1592 \| Line 2701 \| forward_exception(mach_port_t thread_por
2701		switch (behavior) {
2702		case EXCEPTION_DEFAULT:
2703		// fprintf(stderr, "forwarding to exception_raise\n");
2704	<	kret = exception_raise(port, thread_port, task_port, exception_type,
2705	<	exception_data, data_count);
2706	<	MACH_CHECK_ERROR (exception_raise, kret);
2704	>	kret = mach_exception_raise(port, thread_port, task_port, exception_type,
2705	>	exception_data, data_count);
2706	>	MACH_CHECK_ERROR (mach_exception_raise, kret);
2707		break;
2708		case EXCEPTION_STATE:
2709		// fprintf(stderr, "forwarding to exception_raise_state\n");
2710	<	kret = exception_raise_state(port, exception_type, exception_data,
2711	<	data_count, &flavor,
2712	<	thread_state, thread_state_count,
2713	<	thread_state, &thread_state_count);
2714	<	MACH_CHECK_ERROR (exception_raise_state, kret);
2710	>	kret = mach_exception_raise_state(port, exception_type, exception_data,
2711	>	data_count, &flavor,
2712	>	(natural_t *)&thread_state, thread_state_count,
2713	>	(natural_t *)&thread_state, &thread_state_count);
2714	>	MACH_CHECK_ERROR (mach_exception_raise_state, kret);
2715		break;
2716		case EXCEPTION_STATE_IDENTITY:
2717		// fprintf(stderr, "forwarding to exception_raise_state_identity\n");
2718	<	kret = exception_raise_state_identity(port, thread_port, task_port,
2719	<	exception_type, exception_data,
2720	<	data_count, &flavor,
2721	<	thread_state, thread_state_count,
2722	<	thread_state, &thread_state_count);
2723	<	MACH_CHECK_ERROR (exception_raise_state_identity, kret);
2718	>	kret = mach_exception_raise_state_identity(port, thread_port, task_port,
2719	>	exception_type, exception_data,
2720	>	data_count, &flavor,
2721	>	(natural_t *)&thread_state, thread_state_count,
2722	>	(natural_t *)&thread_state, &thread_state_count);
2723	>	MACH_CHECK_ERROR (mach_exception_raise_state_identity, kret);
2724		break;
2725		default:
2726		fprintf(stderr, "forward_exception got unknown behavior\n");
2727	+	kret = KERN_FAILURE;
2728		break;
2729		}
2730
2731		if (behavior != EXCEPTION_DEFAULT) {
2732	<	kret = thread_set_state (thread_port, flavor, thread_state,
2732	>	kret = thread_set_state (thread_port, flavor, (natural_t *)&thread_state,
2733		thread_state_count);
2734		MACH_CHECK_ERROR (thread_set_state, kret);
2735		}
2736
2737	<	return KERN_SUCCESS;
2737	>	return kret;
2738		}
2739
2740		/*
#	Line 1647 \| Line 2757 \| forward_exception(mach_port_t thread_por
2757		* linkage because that is what exc_server expects.
2758		*/
2759		kern_return_t
2760	<	catch_exception_raise(mach_port_t exception_port,
2761	<	mach_port_t thread,
2762	<	mach_port_t task,
2763	<	exception_type_t exception,
2764	<	exception_data_t code,
2765	<	mach_msg_type_number_t codeCount)
2760	>	catch_mach_exception_raise(mach_port_t exception_port,
2761	>	mach_port_t thread,
2762	>	mach_port_t task,
2763	>	exception_type_t exception,
2764	>	mach_exception_data_t code,
2765	>	mach_msg_type_number_t code_count)
2766		{
1657	–	ppc_thread_state_t state;
2767		kern_return_t krc;
2768
2769	<	if ((exception == EXC_BAD_ACCESS) && (codeCount >= 2)) {
2770	<	if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
2771	<	return KERN_SUCCESS;
2769	>	if (exception == EXC_BAD_ACCESS) {
2770	>	switch (code[0]) {
2771	>	case KERN_PROTECTION_FAILURE:
2772	>	case KERN_INVALID_ADDRESS:
2773	>	if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
2774	>	return KERN_SUCCESS;
2775	>	break;
2776	>	}
2777		}
2778
2779		// In Mach we do not need to remove the exception handler.
2780		// If we forward the exception, eventually some exception handler
2781		// will take care of this exception.
2782	<	krc = forward_exception(thread, task, exception, code, codeCount, &ports);
2782	>	krc = forward_exception(thread, task, exception, code, code_count, &ports);
2783
2784		return krc;
2785		}
2786	+
2787	+	/* XXX: borrowed from launchd and gdb */
2788	+	kern_return_t
2789	+	catch_mach_exception_raise_state(mach_port_t exception_port,
2790	+	exception_type_t exception,
2791	+	mach_exception_data_t code,
2792	+	mach_msg_type_number_t code_count,
2793	+	int *flavor,
2794	+	thread_state_t old_state,
2795	+	mach_msg_type_number_t old_state_count,
2796	+	thread_state_t new_state,
2797	+	mach_msg_type_number_t *new_state_count)
2798	+	{
2799	+	memcpy(new_state, old_state, old_state_count * sizeof(old_state[0]));
2800	+	*new_state_count = old_state_count;
2801	+	return KERN_SUCCESS;
2802	+	}
2803	+
2804	+	/* XXX: borrowed from launchd and gdb */
2805	+	kern_return_t
2806	+	catch_mach_exception_raise_state_identity(mach_port_t exception_port,
2807	+	mach_port_t thread_port,
2808	+	mach_port_t task_port,
2809	+	exception_type_t exception,
2810	+	mach_exception_data_t code,
2811	+	mach_msg_type_number_t code_count,
2812	+	int *flavor,
2813	+	thread_state_t old_state,
2814	+	mach_msg_type_number_t old_state_count,
2815	+	thread_state_t new_state,
2816	+	mach_msg_type_number_t *new_state_count)
2817	+	{
2818	+	kern_return_t kret;
2819	+
2820	+	memcpy(new_state, old_state, old_state_count * sizeof(old_state[0]));
2821	+	*new_state_count = old_state_count;
2822	+
2823	+	kret = mach_port_deallocate(mach_task_self(), task_port);
2824	+	MACH_CHECK_ERROR(mach_port_deallocate, kret);
2825	+	kret = mach_port_deallocate(mach_task_self(), thread_port);
2826	+	MACH_CHECK_ERROR(mach_port_deallocate, kret);
2827	+
2828	+	return KERN_SUCCESS;
2829	+	}
2830		#endif
2831
2832		#ifdef HAVE_SIGSEGV_RECOVERY
#	Line 1793 \| Line 2951 \| static bool sigsegv_do_install_handler(s
2951		// addressing modes) used in PPC instructions, you will need the
2952		// GPR state anyway.
2953		krc = thread_set_exception_ports(mach_thread_self(), EXC_MASK_BAD_ACCESS, _exceptionPort,
2954	<	EXCEPTION_DEFAULT, MACHINE_THREAD_STATE);
2954	>	EXCEPTION_DEFAULT \| MACH_EXCEPTION_CODES, SIGSEGV_THREAD_STATE_FLAVOR);
2955		if (krc != KERN_SUCCESS) {
2956		mach_error("thread_set_exception_ports", krc);
2957		return false;
#	Line 1821 \| Line 2979 \| static LONG WINAPI main_exception_filter
2979		{
2980		if (sigsegv_fault_handler != NULL
2981		&& ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION
2982	<	&& ExceptionInfo->ExceptionRecord->NumberParameters == 2
2982	>	&& ExceptionInfo->ExceptionRecord->NumberParameters >= 2
2983		&& handle_badaccess(ExceptionInfo))
2984		return EXCEPTION_CONTINUE_EXECUTION;
2985
#	Line 1973 \| Line 3131 \| void sigsegv_set_dump_state(sigsegv_stat
3131		const int REF_INDEX = 123;
3132		const int REF_VALUE = 45;
3133
3134	<	static int page_size;
3134	>	static sigsegv_uintptr_t page_size;
3135		static volatile char * page = 0;
3136		static volatile int handler_called = 0;
3137
3138	+	/* Barriers */
3139	+	#ifdef __GNUC__
3140	+	#define BARRIER() asm volatile ("" : : : "memory")
3141	+	#else
3142	+	#define BARRIER() /* nothing */
3143	+	#endif
3144	+
3145		#ifdef __GNUC__
3146		// Code range where we expect the fault to come from
3147		static void b_region, e_region;
3148		#endif
3149
3150	<	static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
3150	>	static sigsegv_return_t sigsegv_test_handler(sigsegv_info_t *sip)
3151		{
3152	+	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
3153	+	const sigsegv_address_t instruction_address = sigsegv_get_fault_instruction_address(sip);
3154		#if DEBUG
3155		printf("sigsegv_test_handler(%p, %p)\n", fault_address, instruction_address);
3156		printf("expected fault at %p\n", page + REF_INDEX);
#	Line 1997 \| Line 3164 \| static sigsegv_return_t sigsegv_test_han
3164		#ifdef __GNUC__
3165		// Make sure reported fault instruction address falls into
3166		// expected code range
3167	<	if (instruction_address != SIGSEGV_INVALID_PC
3167	>	if (instruction_address != SIGSEGV_INVALID_ADDRESS
3168		&& ((instruction_address < (sigsegv_address_t)b_region) \|\|
3169		(instruction_address >= (sigsegv_address_t)e_region)))
3170		exit(11);
3171		#endif
3172	<	if (vm_protect((char *)((unsigned long)fault_address & -page_size), page_size, VM_PAGE_READ \| VM_PAGE_WRITE) != 0)
3172	>	if (vm_protect((char *)((sigsegv_uintptr_t)fault_address & -page_size), page_size, VM_PAGE_READ \| VM_PAGE_WRITE) != 0)
3173		exit(12);
3174		return SIGSEGV_RETURN_SUCCESS;
3175		}
3176
3177		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
3178	<	static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
3178	>	static sigsegv_return_t sigsegv_insn_handler(sigsegv_info_t *sip)
3179		{
3180	+	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
3181	+	const sigsegv_address_t instruction_address = sigsegv_get_fault_instruction_address(sip);
3182		#if DEBUG
3183		printf("sigsegv_insn_handler(%p, %p)\n", fault_address, instruction_address);
3184		#endif
3185	<	if (((unsigned long)fault_address - (unsigned long)page) < page_size) {
3185	>	if (((sigsegv_uintptr_t)fault_address - (sigsegv_uintptr_t)page) < page_size) {
3186		#ifdef __GNUC__
3187		// Make sure reported fault instruction address falls into
3188		// expected code range
3189	<	if (instruction_address != SIGSEGV_INVALID_PC
3189	>	if (instruction_address != SIGSEGV_INVALID_ADDRESS
3190		&& ((instruction_address < (sigsegv_address_t)b_region) \|\|
3191		(instruction_address >= (sigsegv_address_t)e_region)))
3192		return SIGSEGV_RETURN_FAILURE;
#	Line 2031 \| Line 3200 \| static sigsegv_return_t sigsegv_insn_han
3200		// More sophisticated tests for instruction skipper
3201		static bool arch_insn_skipper_tests()
3202		{
3203	<	#if (defined(i386) \|\| defined(__i386__)) \|\| defined(__x86_64__)
3203	>	#if (defined(i386) \|\| defined(__i386__)) \|\| (defined(__x86_64__) \|\| defined(_M_X64))
3204		static const unsigned char code[] = {
3205		0x8a, 0x00, // mov (%eax),%al
3206		0x8a, 0x2c, 0x18, // mov (%eax,%ebx,1),%ch
#	Line 2045 \| Line 3214 \| static bool arch_insn_skipper_tests()
3214		0x8b, 0x0c, 0x18, // mov (%eax,%ebx,1),%ecx
3215		0x89, 0x00, // mov %eax,(%eax)
3216		0x89, 0x0c, 0x18, // mov %ecx,(%eax,%ebx,1)
3217	<	#if defined(__x86_64__)
3217	>	#if defined(__x86_64__) \|\| defined(_M_X64)
3218		0x44, 0x8a, 0x00, // mov (%rax),%r8b
3219		0x44, 0x8a, 0x20, // mov (%rax),%r12b
3220		0x42, 0x8a, 0x3c, 0x10, // mov (%rax,%r10,1),%dil
#	Line 2068 \| Line 3237 \| static bool arch_insn_skipper_tests()
3237		0x4c, 0x89, 0x18, // mov %r11,(%rax)
3238		0x4a, 0x89, 0x0c, 0x10, // mov %rcx,(%rax,%r10,1)
3239		0x4e, 0x89, 0x1c, 0x10, // mov %r11,(%rax,%r10,1)
3240	+	0x63, 0x47, 0x04, // movslq 4(%rdi),%eax
3241	+	0x48, 0x63, 0x47, 0x04, // movslq 4(%rdi),%rax
3242		#endif
3243		0 // end
3244		};
3245		const int N_REGS = 20;
3246	<	unsigned long regs[N_REGS];
3246	>	SIGSEGV_REGISTER_TYPE regs[N_REGS];
3247		for (int i = 0; i < N_REGS; i++)
3248		regs[i] = i;
3249	<	const unsigned long start_code = (unsigned long)&code;
3249	>	const sigsegv_uintptr_t start_code = (sigsegv_uintptr_t)&code;
3250		regs[X86_REG_EIP] = start_code;
3251		while ((regs[X86_REG_EIP] - start_code) < (sizeof(code) - 1)
3252		&& ix86_skip_instruction(regs))
#	Line 2091 \| Line 3262 \| int main(void)
3262		if (vm_init() < 0)
3263		return 1;
3264
3265	<	#ifdef _WIN32
2095	<	page_size = 4096;
2096	<	#else
2097	<	page_size = getpagesize();
2098	<	#endif
3265	>	page_size = vm_get_page_size();
3266		if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED)
3267		return 2;
3268
#	Line 2105 \| Line 3272 \| int main(void)
3272
3273		if (!sigsegv_install_handler(sigsegv_test_handler))
3274		return 4;
3275	<
3275	>
3276		#ifdef __GNUC__
3277		b_region = &&L_b_region1;
3278		e_region = &&L_e_region1;
3279		#endif
3280	<	L_b_region1:
3281	<	page[REF_INDEX] = REF_VALUE;
3282	<	if (page[REF_INDEX] != REF_VALUE)
3283	<	exit(20);
3284	<	page[REF_INDEX] = REF_VALUE;
3285	<	L_e_region1:
3280	>	/* This is a really awful hack but otherwise gcc is smart enough
3281	>	* (or bug'ous enough?) to optimize the labels and place them
3282	>	* e.g. at the "main" entry point, which is wrong.
3283	>	*/
3284	>	volatile int label_hack = 1;
3285	>	switch (label_hack) {
3286	>	case 1:
3287	>	L_b_region1:
3288	>	page[REF_INDEX] = REF_VALUE;
3289	>	if (page[REF_INDEX] != REF_VALUE)
3290	>	exit(20);
3291	>	page[REF_INDEX] = REF_VALUE;
3292	>	BARRIER();
3293	>	// fall-through
3294	>	case 2:
3295	>	L_e_region1:
3296	>	BARRIER();
3297	>	break;
3298	>	}
3299
3300		if (handler_called != 1)
3301		return 5;
#	Line 2146 \| Line 3326 \| int main(void)
3326		b_region = &&L_b_region2;
3327		e_region = &&L_e_region2;
3328		#endif
3329	<	L_b_region2:
3330	<	TEST_SKIP_INSTRUCTION(unsigned char);
3331	<	TEST_SKIP_INSTRUCTION(unsigned short);
3332	<	TEST_SKIP_INSTRUCTION(unsigned int);
3333	<	TEST_SKIP_INSTRUCTION(unsigned long);
3334	<	TEST_SKIP_INSTRUCTION(signed char);
3335	<	TEST_SKIP_INSTRUCTION(signed short);
3336	<	TEST_SKIP_INSTRUCTION(signed int);
3337	<	TEST_SKIP_INSTRUCTION(signed long);
3338	<	L_e_region2:
3339	<
3329	>	switch (label_hack) {
3330	>	case 1:
3331	>	L_b_region2:
3332	>	TEST_SKIP_INSTRUCTION(unsigned char);
3333	>	TEST_SKIP_INSTRUCTION(unsigned short);
3334	>	TEST_SKIP_INSTRUCTION(unsigned int);
3335	>	TEST_SKIP_INSTRUCTION(unsigned long);
3336	>	TEST_SKIP_INSTRUCTION(signed char);
3337	>	TEST_SKIP_INSTRUCTION(signed short);
3338	>	TEST_SKIP_INSTRUCTION(signed int);
3339	>	TEST_SKIP_INSTRUCTION(signed long);
3340	>	BARRIER();
3341	>	// fall-through
3342	>	case 2:
3343	>	L_e_region2:
3344	>	BARRIER();
3345	>	break;
3346	>	}
3347		if (!arch_insn_skipper_tests())
3348		return 20;
3349		#endif

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents): Revision 1.49 by gbeauche, 2004-12-02T23:29:52Z vs. Revision 1.88 by asvitkine, 2009-04-13T19:57:08Z

Diff Legend

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.49 by gbeauche, 2004-12-02T23:29:52Z vs.
Revision 1.88 by asvitkine, 2009-04-13T19:57:08Z