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

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.46 by gbeauche, 2004-01-22T00:00:55Z vs.
Revision 1.79 by gbeauche, 2008-01-12T23:01:40Z

#	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	+	#ifdef HAVE_WIN32_VM
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 97 \| Line 112 \| struct instruction_t {
112		char ra, rd;
113		};
114
115	<	static void powerpc_decode_instruction(instruction_t instruction, unsigned int nip, unsigned int gpr)
115	>	static void powerpc_decode_instruction(instruction_t instruction, unsigned int nip, unsigned long gpr)
116		{
117		// Get opcode and divide into fields
118	<	unsigned int opcode = ((unsigned int )nip);
118	>	unsigned int opcode = ((unsigned int )(unsigned long)nip);
119		unsigned int primop = opcode >> 26;
120		unsigned int exop = (opcode >> 1) & 0x3ff;
121		unsigned int ra = (opcode >> 16) & 0x1f;
#	Line 174 \| Line 189 \| static void powerpc_decode_instruction(i
189		transfer_type = SIGSEGV_TRANSFER_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
190		case 45: // sthu
191		transfer_type = SIGSEGV_TRANSFER_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
192	+	case 58: // ld, ldu, lwa
193	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
194	+	transfer_size = SIZE_QUAD;
195	+	addr_mode = ((opcode & 3) == 1) ? MODE_U : MODE_NORM;
196	+	imm &= ~3;
197	+	break;
198	+	case 62: // std, stdu, stq
199	+	transfer_type = SIGSEGV_TRANSFER_STORE;
200	+	transfer_size = SIZE_QUAD;
201	+	addr_mode = ((opcode & 3) == 1) ? MODE_U : MODE_NORM;
202	+	imm &= ~3;
203	+	break;
204		}
205
206		// Calculate effective address
#	Line 214 \| 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		#else
247		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGSEGV)
#	Line 228 \| Line 255 \| static void powerpc_decode_instruction(i
255		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
256		#define SIGSEGV_FAULT_INSTRUCTION (unsigned long)SIGSEGV_CONTEXT_REGS[CTX_EPC]
257		#if (defined(mips) \|\| defined(__mips))
258	<	#define SIGSEGV_REGISTER_FILE SIGSEGV_CONTEXT_REGS
258	>	#define SIGSEGV_REGISTER_FILE &SIGSEGV_CONTEXT_REGS[CTX_EPC], &SIGSEGV_CONTEXT_REGS[CTX_R0]
259		#define SIGSEGV_SKIP_INSTRUCTION mips_skip_instruction
260		#endif
261		#endif
#	Line 244 \| Line 271 \| static void powerpc_decode_instruction(i
271		#define SIGSEGV_REGISTER_FILE ((unsigned long *)SIGSEGV_CONTEXT_REGS), SIGSEGV_SPARC_GWINDOWS, SIGSEGV_SPARC_RWINDOW
272		#define SIGSEGV_SKIP_INSTRUCTION sparc_skip_instruction
273		#endif
274	+	#if defined(__i386__)
275	+	#include <sys/regset.h>
276	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
277	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[EIP]
278	+	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
279	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
280		#endif
281	<	#if defined(__FreeBSD__)
281	>	#endif
282	>	#if defined(__FreeBSD__) \|\| defined(__OpenBSD__)
283		#if (defined(i386) \|\| defined(__i386__))
284		#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext *)scp)->sc_eip)
285	<	#define SIGSEGV_REGISTER_FILE ((unsigned long )&(((struct sigcontext )scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
285	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE )&(((struct sigcontext )scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
286	>	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
287	>	#endif
288	>	#endif
289	>	#if defined(__NetBSD__)
290	>	#if (defined(i386) \|\| defined(__i386__))
291	>	#include <sys/ucontext.h>
292	>	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
293	>	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_EIP]
294	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
295		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
296		#endif
297	+	#if (defined(powerpc) \|\| defined(__powerpc__))
298	+	#include <sys/ucontext.h>
299	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
300	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_PC]
301	+	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIGSEGV_CONTEXT_REGS[_REG_PC], (unsigned long )&SIGSEGV_CONTEXT_REGS[_REG_R0]
302	+	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
303	+	#endif
304		#endif
305		#if defined(__linux__)
306		#if (defined(i386) \|\| defined(__i386__))
307		#include <sys/ucontext.h>
308		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
309		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[14] /* should use REG_EIP instead */
310	<	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
310	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
311		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
312		#endif
313		#if (defined(x86_64) \|\| defined(__x86_64__))
314		#include <sys/ucontext.h>
315		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
316		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[16] /* should use REG_RIP instead */
317	<	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
317	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)SIGSEGV_CONTEXT_REGS
318		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
319		#endif
320		#if (defined(ia64) \|\| defined(__ia64__))
321	<	#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext )scp)->sc_ip & ~0x3ULL) / slot number is in bits 0 and 1 */
321	>	#define SIGSEGV_CONTEXT_REGS ((struct sigcontext *)scp)
322	>	#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS->sc_ip & ~0x3ULL) /* slot number is in bits 0 and 1 */
323	>	#define SIGSEGV_REGISTER_FILE SIGSEGV_CONTEXT_REGS
324	>	#define SIGSEGV_SKIP_INSTRUCTION ia64_skip_instruction
325		#endif
326		#if (defined(powerpc) \|\| defined(__powerpc__))
327		#include <sys/ucontext.h>
328		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.regs)
329		#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS->nip)
330	<	#define SIGSEGV_REGISTER_FILE (unsigned int )&SIGSEGV_CONTEXT_REGS->nip, (unsigned int )(SIGSEGV_CONTEXT_REGS->gpr)
330	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIGSEGV_CONTEXT_REGS->nip, (unsigned long )(SIGSEGV_CONTEXT_REGS->gpr)
331		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
332		#endif
333		#if (defined(hppa) \|\| defined(__hppa__))
#	Line 288 \| Line 341 \| static void powerpc_decode_instruction(i
341		#define SIGSEGV_REGISTER_FILE (&SIGSEGV_CONTEXT_REGS.arm_r0)
342		#define SIGSEGV_SKIP_INSTRUCTION arm_skip_instruction
343		#endif
344	+	#if (defined(mips) \|\| defined(__mips__))
345	+	#include <sys/ucontext.h>
346	+	#define SIGSEGV_CONTEXT_REGS (((struct ucontext *)scp)->uc_mcontext)
347	+	#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS.pc)
348	+	#define SIGSEGV_REGISTER_FILE &SIGSEGV_CONTEXT_REGS.pc, &SIGSEGV_CONTEXT_REGS.gregs[0]
349	+	#define SIGSEGV_SKIP_INSTRUCTION mips_skip_instruction
350	+	#endif
351		#endif
352		#endif
353
#	Line 302 \| Line 362 \| static void powerpc_decode_instruction(i
362		#define SIGSEGV_FAULT_HANDLER_ARGS &scs
363		#define SIGSEGV_FAULT_ADDRESS scp->cr2
364		#define SIGSEGV_FAULT_INSTRUCTION scp->eip
365	<	#define SIGSEGV_REGISTER_FILE (unsigned long *)scp
365	>	#define SIGSEGV_REGISTER_FILE (SIGSEGV_REGISTER_TYPE *)scp
366		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
367		#endif
368		#if (defined(sparc) \|\| defined(__sparc__))
#	Line 317 \| Line 377 \| static void powerpc_decode_instruction(i
377		#define SIGSEGV_FAULT_HANDLER_ARGS sig, scp
378		#define SIGSEGV_FAULT_ADDRESS scp->regs->dar
379		#define SIGSEGV_FAULT_INSTRUCTION scp->regs->nip
380	<	#define SIGSEGV_REGISTER_FILE (unsigned int )&scp->regs->nip, (unsigned int )(scp->regs->gpr)
380	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&scp->regs->nip, (unsigned long )(scp->regs->gpr)
381		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
382		#endif
383		#if (defined(alpha) \|\| defined(__alpha__))
#	Line 423 \| Line 483 \| static sigsegv_address_t get_fault_addre
483		#define SIGSEGV_FAULT_HANDLER_ARGS sig, code, scp, addr
484		#define SIGSEGV_FAULT_ADDRESS addr
485		#define SIGSEGV_FAULT_INSTRUCTION scp->sc_eip
486	<	#define SIGSEGV_REGISTER_FILE ((unsigned long *)&scp->sc_edi)
486	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&scp->sc_edi)
487		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
488		#endif
489		#if (defined(alpha) \|\| defined(__alpha__))
#	Line 481 \| Line 541 \| static sigsegv_address_t get_fault_addre
541		#endif
542		#endif
543
544	+	#if HAVE_WIN32_EXCEPTIONS
545	+	#define WIN32_LEAN_AND_MEAN /* avoid including junk */
546	+	#include <windows.h>
547	+	#include <winerror.h>
548	+
549	+	#if defined(_M_IX86)
550	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST EXCEPTION_POINTERS *ExceptionInfo
551	+	#define SIGSEGV_FAULT_HANDLER_ARGS ExceptionInfo
552	+	#define SIGSEGV_FAULT_ADDRESS ExceptionInfo->ExceptionRecord->ExceptionInformation[1]
553	+	#define SIGSEGV_CONTEXT_REGS ExceptionInfo->ContextRecord
554	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->Eip
555	+	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIGSEGV_CONTEXT_REGS->Edi)
556	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
557	+	#endif
558	+	#if defined(_M_X64)
559	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST EXCEPTION_POINTERS *ExceptionInfo
560	+	#define SIGSEGV_FAULT_HANDLER_ARGS ExceptionInfo
561	+	#define SIGSEGV_FAULT_ADDRESS ExceptionInfo->ExceptionRecord->ExceptionInformation[1]
562	+	#define SIGSEGV_CONTEXT_REGS ExceptionInfo->ContextRecord
563	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->Rip
564	+	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE *)&SIGSEGV_CONTEXT_REGS->Rax)
565	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
566	+	#endif
567	+	#endif
568	+
569		#if HAVE_MACH_EXCEPTIONS
570
571		// This can easily be extended to other Mach systems, but really who
#	Line 541 \| Line 626 \| if (ret != KERN_SUCCESS) { \
626		exit (1); \
627		}
628
629	<	#define SIGSEGV_FAULT_ADDRESS code[1]
630	<	#define SIGSEGV_FAULT_INSTRUCTION get_fault_instruction(thread, state)
631	<	#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP) ((code[0] == KERN_PROTECTION_FAILURE) ? sigsegv_fault_handler(ADDR, IP) : SIGSEGV_RETURN_FAILURE)
632	<	#define SIGSEGV_FAULT_HANDLER_ARGLIST mach_port_t thread, exception_data_t code, ppc_thread_state_t *state
633	<	#define SIGSEGV_FAULT_HANDLER_ARGS thread, code, &state
629	>	#ifdef __ppc__
630	>	#define SIGSEGV_EXCEPTION_STATE_TYPE ppc_exception_state_t
631	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR PPC_EXCEPTION_STATE
632	>	#define SIGSEGV_EXCEPTION_STATE_COUNT PPC_EXCEPTION_STATE_COUNT
633	>	#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.dar
634	>	#define SIGSEGV_THREAD_STATE_TYPE ppc_thread_state_t
635	>	#define SIGSEGV_THREAD_STATE_FLAVOR PPC_THREAD_STATE
636	>	#define SIGSEGV_THREAD_STATE_COUNT PPC_THREAD_STATE_COUNT
637	>	#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.srr0
638		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
639	<	#define SIGSEGV_REGISTER_FILE &state->srr0, &state->r0
640	<
641	<	// Given a suspended thread, stuff the current instruction and
642	<	// registers into state.
643	<	//
644	<	// It would have been nice to have this be ppc/x86 independant which
645	<	// could have been done easily with a thread_state_t instead of
646	<	// ppc_thread_state_t, but because of the way this is called it is
647	<	// easier to do it this way.
648	<	#if (defined(ppc) \|\| defined(__ppc__))
649	<	static inline sigsegv_address_t get_fault_instruction(mach_port_t thread, ppc_thread_state_t *state)
650	<	{
651	<	kern_return_t krc;
652	<	mach_msg_type_number_t count;
653	<
654	<	count = MACHINE_THREAD_STATE_COUNT;
655	<	krc = thread_get_state(thread, MACHINE_THREAD_STATE, (thread_state_t)state, &count);
656	<	MACH_CHECK_ERROR (thread_get_state, krc);
657	<
658	<	return (sigsegv_address_t)state->srr0;
659	<	}
639	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIP->thr_state.srr0, (unsigned long )&SIP->thr_state.r0
640	>	#endif
641	>	#ifdef __ppc64__
642	>	#define SIGSEGV_EXCEPTION_STATE_TYPE ppc_exception_state64_t
643	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR PPC_EXCEPTION_STATE64
644	>	#define SIGSEGV_EXCEPTION_STATE_COUNT PPC_EXCEPTION_STATE64_COUNT
645	>	#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.dar
646	>	#define SIGSEGV_THREAD_STATE_TYPE ppc_thread_state64_t
647	>	#define SIGSEGV_THREAD_STATE_FLAVOR PPC_THREAD_STATE64
648	>	#define SIGSEGV_THREAD_STATE_COUNT PPC_THREAD_STATE64_COUNT
649	>	#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.srr0
650	>	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
651	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIP->thr_state.srr0, (unsigned long )&SIP->thr_state.r0
652	>	#endif
653	>	#ifdef __i386__
654	>	#define SIGSEGV_EXCEPTION_STATE_TYPE struct i386_exception_state
655	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR i386_EXCEPTION_STATE
656	>	#define SIGSEGV_EXCEPTION_STATE_COUNT i386_EXCEPTION_STATE_COUNT
657	>	#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.faultvaddr
658	>	#define SIGSEGV_THREAD_STATE_TYPE struct i386_thread_state
659	>	#define SIGSEGV_THREAD_STATE_FLAVOR i386_THREAD_STATE
660	>	#define SIGSEGV_THREAD_STATE_COUNT i386_THREAD_STATE_COUNT
661	>	#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.eip
662	>	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
663	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE )&SIP->thr_state.eax) / EAX is the first GPR we consider */
664	>	#endif
665	>	#ifdef __x86_64__
666	>	#define SIGSEGV_EXCEPTION_STATE_TYPE struct x86_exception_state64
667	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR x86_EXCEPTION_STATE64
668	>	#define SIGSEGV_EXCEPTION_STATE_COUNT x86_EXCEPTION_STATE64_COUNT
669	>	#define SIGSEGV_FAULT_ADDRESS SIP->exc_state.faultvaddr
670	>	#define SIGSEGV_THREAD_STATE_TYPE struct x86_thread_state64
671	>	#define SIGSEGV_THREAD_STATE_FLAVOR x86_THREAD_STATE64
672	>	#define SIGSEGV_THREAD_STATE_COUNT x86_THREAD_STATE64_COUNT
673	>	#define SIGSEGV_FAULT_INSTRUCTION SIP->thr_state.rip
674	>	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
675	>	#define SIGSEGV_REGISTER_FILE ((SIGSEGV_REGISTER_TYPE )&SIP->thr_state.rax) / RAX is the first GPR we consider */
676		#endif
677	+	#define SIGSEGV_FAULT_ADDRESS_FAST code[1]
678	+	#define SIGSEGV_FAULT_INSTRUCTION_FAST SIGSEGV_INVALID_ADDRESS
679	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST mach_port_t thread, exception_data_t code
680	+	#define SIGSEGV_FAULT_HANDLER_ARGS thread, code
681
682		// Since there can only be one exception thread running at any time
683		// this is not a problem.
#	Line 621 \| Line 730 \| *handleExceptions(void priv)**
730		* Instruction skipping
731		*/
732
733	+	#ifndef SIGSEGV_REGISTER_TYPE
734	+	#define SIGSEGV_REGISTER_TYPE sigsegv_uintptr_t
735	+	#endif
736	+
737		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
738		// Decode and skip X86 instruction
739	<	#if (defined(i386) \|\| defined(__i386__)) \|\| defined(__x86_64__)
739	>	#if (defined(i386) \|\| defined(__i386__)) \|\| (defined(__x86_64__) \|\| defined(_M_X64))
740		#if defined(__linux__)
741		enum {
742		#if (defined(i386) \|\| defined(__i386__))
#	Line 658 \| Line 771 \| enum {
771		#endif
772		};
773		#endif
774	<	#if defined(__NetBSD__) \|\| defined(__FreeBSD__)
774	>	#if defined(__NetBSD__)
775		enum {
776		#if (defined(i386) \|\| defined(__i386__))
777	+	X86_REG_EIP = _REG_EIP,
778	+	X86_REG_EAX = _REG_EAX,
779	+	X86_REG_ECX = _REG_ECX,
780	+	X86_REG_EDX = _REG_EDX,
781	+	X86_REG_EBX = _REG_EBX,
782	+	X86_REG_ESP = _REG_ESP,
783	+	X86_REG_EBP = _REG_EBP,
784	+	X86_REG_ESI = _REG_ESI,
785	+	X86_REG_EDI = _REG_EDI
786	+	#endif
787	+	};
788	+	#endif
789	+	#if defined(__FreeBSD__)
790	+	enum {
791	+	#if (defined(i386) \|\| defined(__i386__))
792	+	X86_REG_EIP = 10,
793	+	X86_REG_EAX = 7,
794	+	X86_REG_ECX = 6,
795	+	X86_REG_EDX = 5,
796	+	X86_REG_EBX = 4,
797	+	X86_REG_ESP = 13,
798	+	X86_REG_EBP = 2,
799	+	X86_REG_ESI = 1,
800	+	X86_REG_EDI = 0
801	+	#endif
802	+	};
803	+	#endif
804	+	#if defined(__OpenBSD__)
805	+	enum {
806	+	#if defined(__i386__)
807	+	// EDI is the first register we consider
808	+	#define OREG(REG) offsetof(struct sigcontext, sc_##REG)
809	+	#define DREG(REG) ((OREG(REG) - OREG(edi)) / 4)
810	+	X86_REG_EIP = DREG(eip), // 7
811	+	X86_REG_EAX = DREG(eax), // 6
812	+	X86_REG_ECX = DREG(ecx), // 5
813	+	X86_REG_EDX = DREG(edx), // 4
814	+	X86_REG_EBX = DREG(ebx), // 3
815	+	X86_REG_ESP = DREG(esp), // 10
816	+	X86_REG_EBP = DREG(ebp), // 2
817	+	X86_REG_ESI = DREG(esi), // 1
818	+	X86_REG_EDI = DREG(edi) // 0
819	+	#undef DREG
820	+	#undef OREG
821	+	#endif
822	+	};
823	+	#endif
824	+	#if defined(__sun__)
825	+	// Same as for Linux, need to check for x86-64
826	+	enum {
827	+	#if defined(__i386__)
828	+	X86_REG_EIP = EIP,
829	+	X86_REG_EAX = EAX,
830	+	X86_REG_ECX = ECX,
831	+	X86_REG_EDX = EDX,
832	+	X86_REG_EBX = EBX,
833	+	X86_REG_ESP = ESP,
834	+	X86_REG_EBP = EBP,
835	+	X86_REG_ESI = ESI,
836	+	X86_REG_EDI = EDI
837	+	#endif
838	+	};
839	+	#endif
840	+	#if defined(__APPLE__) && defined(__MACH__)
841	+	enum {
842	+	#if (defined(i386) \|\| defined(__i386__))
843	+	#ifdef i386_SAVED_STATE
844	+	// same as FreeBSD (in Open Darwin 8.0.1)
845		X86_REG_EIP = 10,
846		X86_REG_EAX = 7,
847		X86_REG_ECX = 6,
#	Line 670 \| Line 851 \| enum {
851		X86_REG_EBP = 2,
852		X86_REG_ESI = 1,
853		X86_REG_EDI = 0
854	+	#else
855	+	// new layout (MacOS X 10.4.4 for x86)
856	+	X86_REG_EIP = 10,
857	+	X86_REG_EAX = 0,
858	+	X86_REG_ECX = 2,
859	+	X86_REG_EDX = 3,
860	+	X86_REG_EBX = 1,
861	+	X86_REG_ESP = 7,
862	+	X86_REG_EBP = 6,
863	+	X86_REG_ESI = 5,
864	+	X86_REG_EDI = 4
865	+	#endif
866	+	#endif
867	+	#if defined(__x86_64__)
868	+	X86_REG_R8 = 8,
869	+	X86_REG_R9 = 9,
870	+	X86_REG_R10 = 10,
871	+	X86_REG_R11 = 11,
872	+	X86_REG_R12 = 12,
873	+	X86_REG_R13 = 13,
874	+	X86_REG_R14 = 14,
875	+	X86_REG_R15 = 15,
876	+	X86_REG_EDI = 4,
877	+	X86_REG_ESI = 5,
878	+	X86_REG_EBP = 6,
879	+	X86_REG_EBX = 1,
880	+	X86_REG_EDX = 3,
881	+	X86_REG_EAX = 0,
882	+	X86_REG_ECX = 2,
883	+	X86_REG_ESP = 7,
884	+	X86_REG_EIP = 16
885	+	#endif
886	+	};
887	+	#endif
888	+	#if defined(_WIN32)
889	+	enum {
890	+	#if defined(_M_IX86)
891	+	X86_REG_EIP = 7,
892	+	X86_REG_EAX = 5,
893	+	X86_REG_ECX = 4,
894	+	X86_REG_EDX = 3,
895	+	X86_REG_EBX = 2,
896	+	X86_REG_ESP = 10,
897	+	X86_REG_EBP = 6,
898	+	X86_REG_ESI = 1,
899	+	X86_REG_EDI = 0
900	+	#endif
901	+	#if defined(_M_X64)
902	+	X86_REG_EAX = 0,
903	+	X86_REG_ECX = 1,
904	+	X86_REG_EDX = 2,
905	+	X86_REG_EBX = 3,
906	+	X86_REG_ESP = 4,
907	+	X86_REG_EBP = 5,
908	+	X86_REG_ESI = 6,
909	+	X86_REG_EDI = 7,
910	+	X86_REG_R8 = 8,
911	+	X86_REG_R9 = 9,
912	+	X86_REG_R10 = 10,
913	+	X86_REG_R11 = 11,
914	+	X86_REG_R12 = 12,
915	+	X86_REG_R13 = 13,
916	+	X86_REG_R14 = 14,
917	+	X86_REG_R15 = 15,
918	+	X86_REG_EIP = 16
919		#endif
920		};
921		#endif
#	Line 707 \| Line 953 \| static inline int ix86_step_over_modrm(u
953		return offset;
954		}
955
956	<	static bool ix86_skip_instruction(unsigned long * regs)
956	>	static bool ix86_skip_instruction(SIGSEGV_REGISTER_TYPE * regs)
957		{
958		unsigned char * eip = (unsigned char *)regs[X86_REG_EIP];
959
960		if (eip == 0)
961		return false;
962	+	#ifdef _WIN32
963	+	if (IsBadCodePtr((FARPROC)eip))
964	+	return false;
965	+	#endif
966
967	+	enum instruction_type_t {
968	+	i_MOV,
969	+	i_ADD
970	+	};
971	+
972		transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
973		transfer_size_t transfer_size = SIZE_LONG;
974	+	instruction_type_t instruction_type = i_MOV;
975
976		int reg = -1;
977		int len = 0;
#	Line 733 \| Line 989 \| static bool ix86_skip_instruction(unsign
989		}
990
991		// REX prefix
992	<	#if defined(__x86_64__)
992	>	#if defined(__x86_64__) \|\| defined(_M_X64)
993		struct rex_t {
994		unsigned char W;
995		unsigned char R;
#	Line 766 \| Line 1022 \| static bool ix86_skip_instruction(unsign
1022		#endif
1023
1024		// Decode instruction
1025	+	int op_len = 1;
1026		int target_size = SIZE_UNKNOWN;
1027		switch (eip[0]) {
1028		case 0x0f:
#	Line 775 \| Line 1032 \| static bool ix86_skip_instruction(unsign
1032		case 0xb6: // MOVZX r32, r/m8
1033		transfer_size = SIZE_BYTE;
1034		goto do_mov_extend;
1035	+	case 0xbf: // MOVSX r32, r/m16
1036		case 0xb7: // MOVZX r32, r/m16
1037		transfer_size = SIZE_WORD;
1038		goto do_mov_extend;
1039		do_mov_extend:
1040	<	switch (eip[2] & 0xc0) {
1041	<	case 0x80:
1042	<	reg = (eip[2] >> 3) & 7;
1043	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
1044	<	break;
1045	<	case 0x40:
1046	<	reg = (eip[2] >> 3) & 7;
1047	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
1048	<	break;
1049	<	case 0x00:
1050	<	reg = (eip[2] >> 3) & 7;
1051	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
1052	<	break;
1053	<	}
1054	<	len += 3 + ix86_step_over_modrm(eip + 2);
1055	<	break;
1056	<	}
1057	<	break;
1040	>	op_len = 2;
1041	>	goto do_transfer_load;
1042	>	}
1043	>	break;
1044	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1045	>	case 0x63: // MOVSXD r64, r/m32
1046	>	if (has_rex && rex.W) {
1047	>	transfer_size = SIZE_LONG;
1048	>	target_size = SIZE_QUAD;
1049	>	}
1050	>	else if (transfer_size != SIZE_WORD) {
1051	>	transfer_size = SIZE_LONG;
1052	>	target_size = SIZE_QUAD;
1053	>	}
1054	>	goto do_transfer_load;
1055	>	#endif
1056	>	case 0x02: // ADD r8, r/m8
1057	>	transfer_size = SIZE_BYTE;
1058	>	case 0x03: // ADD r32, r/m32
1059	>	instruction_type = i_ADD;
1060	>	goto do_transfer_load;
1061		case 0x8a: // MOV r8, r/m8
1062		transfer_size = SIZE_BYTE;
1063		case 0x8b: // MOV r32, r/m32 (or 16-bit operation)
1064	<	switch (eip[1] & 0xc0) {
1064	>	do_transfer_load:
1065	>	switch (eip[op_len] & 0xc0) {
1066		case 0x80:
1067	<	reg = (eip[1] >> 3) & 7;
1067	>	reg = (eip[op_len] >> 3) & 7;
1068		transfer_type = SIGSEGV_TRANSFER_LOAD;
1069		break;
1070		case 0x40:
1071	<	reg = (eip[1] >> 3) & 7;
1071	>	reg = (eip[op_len] >> 3) & 7;
1072		transfer_type = SIGSEGV_TRANSFER_LOAD;
1073		break;
1074		case 0x00:
1075	<	reg = (eip[1] >> 3) & 7;
1075	>	reg = (eip[op_len] >> 3) & 7;
1076		transfer_type = SIGSEGV_TRANSFER_LOAD;
1077		break;
1078		}
1079	<	len += 2 + ix86_step_over_modrm(eip + 1);
1079	>	len += 1 + op_len + ix86_step_over_modrm(eip + op_len);
1080		break;
1081	+	case 0x00: // ADD r/m8, r8
1082	+	transfer_size = SIZE_BYTE;
1083	+	case 0x01: // ADD r/m32, r32
1084	+	instruction_type = i_ADD;
1085	+	goto do_transfer_store;
1086		case 0x88: // MOV r/m8, r8
1087		transfer_size = SIZE_BYTE;
1088		case 0x89: // MOV r/m32, r32 (or 16-bit operation)
1089	<	switch (eip[1] & 0xc0) {
1089	>	do_transfer_store:
1090	>	switch (eip[op_len] & 0xc0) {
1091		case 0x80:
1092	<	reg = (eip[1] >> 3) & 7;
1092	>	reg = (eip[op_len] >> 3) & 7;
1093		transfer_type = SIGSEGV_TRANSFER_STORE;
1094		break;
1095		case 0x40:
1096	<	reg = (eip[1] >> 3) & 7;
1096	>	reg = (eip[op_len] >> 3) & 7;
1097		transfer_type = SIGSEGV_TRANSFER_STORE;
1098		break;
1099		case 0x00:
1100	<	reg = (eip[1] >> 3) & 7;
1100	>	reg = (eip[op_len] >> 3) & 7;
1101		transfer_type = SIGSEGV_TRANSFER_STORE;
1102		break;
1103		}
1104	<	len += 2 + ix86_step_over_modrm(eip + 1);
1104	>	len += 1 + op_len + ix86_step_over_modrm(eip + op_len);
1105		break;
1106		}
1107		if (target_size == SIZE_UNKNOWN)
#	Line 844 \| Line 1112 \| static bool ix86_skip_instruction(unsign
1112		return false;
1113		}
1114
1115	<	#if defined(__x86_64__)
1115	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1116		if (rex.R)
1117		reg += 8;
1118		#endif
1119
1120	<	if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
1120	>	if (instruction_type == i_MOV && transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
1121		static const int x86_reg_map[] = {
1122		X86_REG_EAX, X86_REG_ECX, X86_REG_EDX, X86_REG_EBX,
1123		X86_REG_ESP, X86_REG_EBP, X86_REG_ESI, X86_REG_EDI,
1124	<	#if defined(__x86_64__)
1124	>	#if defined(__x86_64__) \|\| defined(_M_X64)
1125		X86_REG_R8, X86_REG_R9, X86_REG_R10, X86_REG_R11,
1126		X86_REG_R12, X86_REG_R13, X86_REG_R14, X86_REG_R15,
1127		#endif
#	Line 885 \| Line 1153 \| static bool ix86_skip_instruction(unsign
1153		}
1154
1155		#if DEBUG
1156	<	printf("%08x: %s %s access", regs[X86_REG_EIP],
1156	>	printf("%p: %s %s access", (void *)regs[X86_REG_EIP],
1157		transfer_size == SIZE_BYTE ? "byte" :
1158		transfer_size == SIZE_WORD ? "word" :
1159		transfer_size == SIZE_LONG ? "long" :
#	Line 940 \| Line 1208 \| static bool ix86_skip_instruction(unsign
1208		}
1209		#endif
1210
1211	+	// Decode and skip IA-64 instruction
1212	+	#if defined(__ia64__)
1213	+	#if defined(__linux__)
1214	+	// We can directly patch the slot number
1215	+	#define IA64_CAN_PATCH_IP_SLOT 1
1216	+	// Helper macros to access the machine context
1217	+	#define IA64_CONTEXT_TYPE struct sigcontext *
1218	+	#define IA64_CONTEXT scp
1219	+	#define IA64_GET_IP() (IA64_CONTEXT->sc_ip)
1220	+	#define IA64_SET_IP(V) (IA64_CONTEXT->sc_ip = (V))
1221	+	#define IA64_GET_PR(P) ((IA64_CONTEXT->sc_pr >> (P)) & 1)
1222	+	#define IA64_GET_NAT(I) ((IA64_CONTEXT->sc_nat >> (I)) & 1)
1223	+	#define IA64_SET_NAT(I,V) (IA64_CONTEXT->sc_nat= (IA64_CONTEXT->sc_nat & ~(1ul << (I))) \| (((unsigned long)!!(V)) << (I)))
1224	+	#define IA64_GET_GR(R) (IA64_CONTEXT->sc_gr[(R)])
1225	+	#define IA64_SET_GR(R,V) (IA64_CONTEXT->sc_gr[(R)] = (V))
1226	+	#endif
1227	+
1228	+	// Instruction operations
1229	+	enum {
1230	+	IA64_INST_UNKNOWN = 0,
1231	+	IA64_INST_LD1, // ld1 op0=[op1]
1232	+	IA64_INST_LD1_UPDATE, // ld1 op0=[op1],op2
1233	+	IA64_INST_LD2, // ld2 op0=[op1]
1234	+	IA64_INST_LD2_UPDATE, // ld2 op0=[op1],op2
1235	+	IA64_INST_LD4, // ld4 op0=[op1]
1236	+	IA64_INST_LD4_UPDATE, // ld4 op0=[op1],op2
1237	+	IA64_INST_LD8, // ld8 op0=[op1]
1238	+	IA64_INST_LD8_UPDATE, // ld8 op0=[op1],op2
1239	+	IA64_INST_ST1, // st1 [op0]=op1
1240	+	IA64_INST_ST1_UPDATE, // st1 [op0]=op1,op2
1241	+	IA64_INST_ST2, // st2 [op0]=op1
1242	+	IA64_INST_ST2_UPDATE, // st2 [op0]=op1,op2
1243	+	IA64_INST_ST4, // st4 [op0]=op1
1244	+	IA64_INST_ST4_UPDATE, // st4 [op0]=op1,op2
1245	+	IA64_INST_ST8, // st8 [op0]=op1
1246	+	IA64_INST_ST8_UPDATE, // st8 [op0]=op1,op2
1247	+	IA64_INST_ADD, // add op0=op1,op2,op3
1248	+	IA64_INST_SUB, // sub op0=op1,op2,op3
1249	+	IA64_INST_SHLADD, // shladd op0=op1,op3,op2
1250	+	IA64_INST_AND, // and op0=op1,op2
1251	+	IA64_INST_ANDCM, // andcm op0=op1,op2
1252	+	IA64_INST_OR, // or op0=op1,op2
1253	+	IA64_INST_XOR, // xor op0=op1,op2
1254	+	IA64_INST_SXT1, // sxt1 op0=op1
1255	+	IA64_INST_SXT2, // sxt2 op0=op1
1256	+	IA64_INST_SXT4, // sxt4 op0=op1
1257	+	IA64_INST_ZXT1, // zxt1 op0=op1
1258	+	IA64_INST_ZXT2, // zxt2 op0=op1
1259	+	IA64_INST_ZXT4, // zxt4 op0=op1
1260	+	IA64_INST_NOP // nop op0
1261	+	};
1262	+
1263	+	const int IA64_N_OPERANDS = 4;
1264	+
1265	+	// Decoded operand type
1266	+	struct ia64_operand_t {
1267	+	unsigned char commit; // commit result of operation to register file?
1268	+	unsigned char valid; // XXX: not really used, can be removed (debug)
1269	+	signed char index; // index of GPR, or -1 if immediate value
1270	+	unsigned char nat; // NaT state before operation
1271	+	unsigned long value; // register contents or immediate value
1272	+	};
1273	+
1274	+	// Decoded instruction type
1275	+	struct ia64_instruction_t {
1276	+	unsigned char mnemo; // operation to perform
1277	+	unsigned char pred; // predicate register to check
1278	+	unsigned char no_memory; // used to emulated main fault instruction
1279	+	unsigned long inst; // the raw instruction bits (41-bit wide)
1280	+	ia64_operand_t operands[IA64_N_OPERANDS];
1281	+	};
1282	+
1283	+	// Get immediate sign-bit
1284	+	static inline int ia64_inst_get_sbit(unsigned long inst)
1285	+	{
1286	+	return (inst >> 36) & 1;
1287	+	}
1288	+
1289	+	// Get 8-bit immediate value (A3, A8, I27, M30)
1290	+	static inline unsigned long ia64_inst_get_imm8(unsigned long inst)
1291	+	{
1292	+	unsigned long value = (inst >> 13) & 0x7ful;
1293	+	if (ia64_inst_get_sbit(inst))
1294	+	value \|= ~0x7ful;
1295	+	return value;
1296	+	}
1297	+
1298	+	// Get 9-bit immediate value (M3)
1299	+	static inline unsigned long ia64_inst_get_imm9b(unsigned long inst)
1300	+	{
1301	+	unsigned long value = (((inst >> 27) & 1) << 7) \| ((inst >> 13) & 0x7f);
1302	+	if (ia64_inst_get_sbit(inst))
1303	+	value \|= ~0xfful;
1304	+	return value;
1305	+	}
1306	+
1307	+	// Get 9-bit immediate value (M5)
1308	+	static inline unsigned long ia64_inst_get_imm9a(unsigned long inst)
1309	+	{
1310	+	unsigned long value = (((inst >> 27) & 1) << 7) \| ((inst >> 6) & 0x7f);
1311	+	if (ia64_inst_get_sbit(inst))
1312	+	value \|= ~0xfful;
1313	+	return value;
1314	+	}
1315	+
1316	+	// Get 14-bit immediate value (A4)
1317	+	static inline unsigned long ia64_inst_get_imm14(unsigned long inst)
1318	+	{
1319	+	unsigned long value = (((inst >> 27) & 0x3f) << 7) \| (inst & 0x7f);
1320	+	if (ia64_inst_get_sbit(inst))
1321	+	value \|= ~0x1fful;
1322	+	return value;
1323	+	}
1324	+
1325	+	// Get 22-bit immediate value (A5)
1326	+	static inline unsigned long ia64_inst_get_imm22(unsigned long inst)
1327	+	{
1328	+	unsigned long value = ((((inst >> 22) & 0x1f) << 16) \|
1329	+	(((inst >> 27) & 0x1ff) << 7) \|
1330	+	(inst & 0x7f));
1331	+	if (ia64_inst_get_sbit(inst))
1332	+	value \|= ~0x1ffffful;
1333	+	return value;
1334	+	}
1335	+
1336	+	// Get 21-bit immediate value (I19)
1337	+	static inline unsigned long ia64_inst_get_imm21(unsigned long inst)
1338	+	{
1339	+	return (((inst >> 36) & 1) << 20) \| ((inst >> 6) & 0xfffff);
1340	+	}
1341	+
1342	+	// Get 2-bit count value (A2)
1343	+	static inline int ia64_inst_get_count2(unsigned long inst)
1344	+	{
1345	+	return (inst >> 27) & 0x3;
1346	+	}
1347	+
1348	+	// Get bundle template
1349	+	static inline unsigned int ia64_get_template(unsigned long raw_ip)
1350	+	{
1351	+	unsigned long ip = (unsigned long )(raw_ip & ~3ul);
1352	+	return ip[0] & 0x1f;
1353	+	}
1354	+
1355	+	// Get specified instruction in bundle
1356	+	static unsigned long ia64_get_instruction(unsigned long raw_ip, int slot)
1357	+	{
1358	+	unsigned long inst;
1359	+	unsigned long ip = (unsigned long )(raw_ip & ~3ul);
1360	+	#if DEBUG
1361	+	printf("Bundle: %016lx%016lx\n", ip[1], ip[0]);
1362	+	#endif
1363	+
1364	+	switch (slot) {
1365	+	case 0:
1366	+	inst = (ip[0] >> 5) & 0x1fffffffffful;
1367	+	break;
1368	+	case 1:
1369	+	inst = ((ip[1] & 0x7ffffful) << 18) \| ((ip[0] >> 46) & 0x3fffful);
1370	+	break;
1371	+	case 2:
1372	+	inst = (ip[1] >> 23) & 0x1fffffffffful;
1373	+	break;
1374	+	case 3:
1375	+	fprintf(stderr, "ERROR: ia64_get_instruction(), invalid slot number %d\n", slot);
1376	+	abort();
1377	+	break;
1378	+	}
1379	+
1380	+	#if DEBUG
1381	+	printf(" Instruction %d: 0x%016lx\n", slot, inst);
1382	+	#endif
1383	+	return inst;
1384	+	}
1385	+
1386	+	// Decode group 0 instructions
1387	+	static bool ia64_decode_instruction_0(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1388	+	{
1389	+	const int r1 = (inst->inst >> 6) & 0x7f;
1390	+	const int r3 = (inst->inst >> 20) & 0x7f;
1391	+
1392	+	const int x3 = (inst->inst >> 33) & 0x07;
1393	+	const int x6 = (inst->inst >> 27) & 0x3f;
1394	+	const int x2 = (inst->inst >> 31) & 0x03;
1395	+	const int x4 = (inst->inst >> 27) & 0x0f;
1396	+
1397	+	if (x3 == 0) {
1398	+	switch (x6) {
1399	+	case 0x01: // nop.i (I19)
1400	+	inst->mnemo = IA64_INST_NOP;
1401	+	inst->operands[0].valid = true;
1402	+	inst->operands[0].index = -1;
1403	+	inst->operands[0].value = ia64_inst_get_imm21(inst->inst);
1404	+	return true;
1405	+	case 0x14: // sxt1 (I29)
1406	+	case 0x15: // sxt2 (I29)
1407	+	case 0x16: // sxt4 (I29)
1408	+	case 0x10: // zxt1 (I29)
1409	+	case 0x11: // zxt2 (I29)
1410	+	case 0x12: // zxt4 (I29)
1411	+	switch (x6) {
1412	+	case 0x14: inst->mnemo = IA64_INST_SXT1; break;
1413	+	case 0x15: inst->mnemo = IA64_INST_SXT2; break;
1414	+	case 0x16: inst->mnemo = IA64_INST_SXT4; break;
1415	+	case 0x10: inst->mnemo = IA64_INST_ZXT1; break;
1416	+	case 0x11: inst->mnemo = IA64_INST_ZXT2; break;
1417	+	case 0x12: inst->mnemo = IA64_INST_ZXT4; break;
1418	+	default: abort();
1419	+	}
1420	+	inst->operands[0].valid = true;
1421	+	inst->operands[0].index = r1;
1422	+	inst->operands[1].valid = true;
1423	+	inst->operands[1].index = r3;
1424	+	inst->operands[1].value = IA64_GET_GR(r3);
1425	+	inst->operands[1].nat = IA64_GET_NAT(r3);
1426	+	return true;
1427	+	}
1428	+	}
1429	+	return false;
1430	+	}
1431	+
1432	+	// Decode group 4 instructions (load/store instructions)
1433	+	static bool ia64_decode_instruction_4(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1434	+	{
1435	+	const int r1 = (inst->inst >> 6) & 0x7f;
1436	+	const int r2 = (inst->inst >> 13) & 0x7f;
1437	+	const int r3 = (inst->inst >> 20) & 0x7f;
1438	+
1439	+	const int m = (inst->inst >> 36) & 1;
1440	+	const int x = (inst->inst >> 27) & 1;
1441	+	const int x6 = (inst->inst >> 30) & 0x3f;
1442	+
1443	+	switch (x6) {
1444	+	case 0x00:
1445	+	case 0x01:
1446	+	case 0x02:
1447	+	case 0x03:
1448	+	if (x == 0) {
1449	+	inst->operands[0].valid = true;
1450	+	inst->operands[0].index = r1;
1451	+	inst->operands[1].valid = true;
1452	+	inst->operands[1].index = r3;
1453	+	inst->operands[1].value = IA64_GET_GR(r3);
1454	+	inst->operands[1].nat = IA64_GET_NAT(r3);
1455	+	if (m == 0) {
1456	+	switch (x6) {
1457	+	case 0x00: inst->mnemo = IA64_INST_LD1; break;
1458	+	case 0x01: inst->mnemo = IA64_INST_LD2; break;
1459	+	case 0x02: inst->mnemo = IA64_INST_LD4; break;
1460	+	case 0x03: inst->mnemo = IA64_INST_LD8; break;
1461	+	}
1462	+	}
1463	+	else {
1464	+	inst->operands[2].valid = true;
1465	+	inst->operands[2].index = r2;
1466	+	inst->operands[2].value = IA64_GET_GR(r2);
1467	+	inst->operands[2].nat = IA64_GET_NAT(r2);
1468	+	switch (x6) {
1469	+	case 0x00: inst->mnemo = IA64_INST_LD1_UPDATE; break;
1470	+	case 0x01: inst->mnemo = IA64_INST_LD2_UPDATE; break;
1471	+	case 0x02: inst->mnemo = IA64_INST_LD4_UPDATE; break;
1472	+	case 0x03: inst->mnemo = IA64_INST_LD8_UPDATE; break;
1473	+	}
1474	+	}
1475	+	return true;
1476	+	}
1477	+	break;
1478	+	case 0x30:
1479	+	case 0x31:
1480	+	case 0x32:
1481	+	case 0x33:
1482	+	if (m == 0 && x == 0) {
1483	+	inst->operands[0].valid = true;
1484	+	inst->operands[0].index = r3;
1485	+	inst->operands[0].value = IA64_GET_GR(r3);
1486	+	inst->operands[0].nat = IA64_GET_NAT(r3);
1487	+	inst->operands[1].valid = true;
1488	+	inst->operands[1].index = r2;
1489	+	inst->operands[1].value = IA64_GET_GR(r2);
1490	+	inst->operands[1].nat = IA64_GET_NAT(r2);
1491	+	switch (x6) {
1492	+	case 0x30: inst->mnemo = IA64_INST_ST1; break;
1493	+	case 0x31: inst->mnemo = IA64_INST_ST2; break;
1494	+	case 0x32: inst->mnemo = IA64_INST_ST4; break;
1495	+	case 0x33: inst->mnemo = IA64_INST_ST8; break;
1496	+	}
1497	+	return true;
1498	+	}
1499	+	break;
1500	+	}
1501	+	return false;
1502	+	}
1503	+
1504	+	// Decode group 5 instructions (load/store instructions)
1505	+	static bool ia64_decode_instruction_5(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1506	+	{
1507	+	const int r1 = (inst->inst >> 6) & 0x7f;
1508	+	const int r2 = (inst->inst >> 13) & 0x7f;
1509	+	const int r3 = (inst->inst >> 20) & 0x7f;
1510	+
1511	+	const int x6 = (inst->inst >> 30) & 0x3f;
1512	+
1513	+	switch (x6) {
1514	+	case 0x00:
1515	+	case 0x01:
1516	+	case 0x02:
1517	+	case 0x03:
1518	+	inst->operands[0].valid = true;
1519	+	inst->operands[0].index = r1;
1520	+	inst->operands[1].valid = true;
1521	+	inst->operands[1].index = r3;
1522	+	inst->operands[1].value = IA64_GET_GR(r3);
1523	+	inst->operands[1].nat = IA64_GET_NAT(r3);
1524	+	inst->operands[2].valid = true;
1525	+	inst->operands[2].index = -1;
1526	+	inst->operands[2].value = ia64_inst_get_imm9b(inst->inst);
1527	+	inst->operands[2].nat = 0;
1528	+	switch (x6) {
1529	+	case 0x00: inst->mnemo = IA64_INST_LD1_UPDATE; break;
1530	+	case 0x01: inst->mnemo = IA64_INST_LD2_UPDATE; break;
1531	+	case 0x02: inst->mnemo = IA64_INST_LD4_UPDATE; break;
1532	+	case 0x03: inst->mnemo = IA64_INST_LD8_UPDATE; break;
1533	+	}
1534	+	return true;
1535	+	case 0x30:
1536	+	case 0x31:
1537	+	case 0x32:
1538	+	case 0x33:
1539	+	inst->operands[0].valid = true;
1540	+	inst->operands[0].index = r3;
1541	+	inst->operands[0].value = IA64_GET_GR(r3);
1542	+	inst->operands[0].nat = IA64_GET_NAT(r3);
1543	+	inst->operands[1].valid = true;
1544	+	inst->operands[1].index = r2;
1545	+	inst->operands[1].value = IA64_GET_GR(r2);
1546	+	inst->operands[1].nat = IA64_GET_NAT(r2);
1547	+	inst->operands[2].valid = true;
1548	+	inst->operands[2].index = -1;
1549	+	inst->operands[2].value = ia64_inst_get_imm9a(inst->inst);
1550	+	inst->operands[2].nat = 0;
1551	+	switch (x6) {
1552	+	case 0x30: inst->mnemo = IA64_INST_ST1_UPDATE; break;
1553	+	case 0x31: inst->mnemo = IA64_INST_ST2_UPDATE; break;
1554	+	case 0x32: inst->mnemo = IA64_INST_ST4_UPDATE; break;
1555	+	case 0x33: inst->mnemo = IA64_INST_ST8_UPDATE; break;
1556	+	}
1557	+	return true;
1558	+	}
1559	+	return false;
1560	+	}
1561	+
1562	+	// Decode group 8 instructions (ALU integer)
1563	+	static bool ia64_decode_instruction_8(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1564	+	{
1565	+	const int r1 = (inst->inst >> 6) & 0x7f;
1566	+	const int r2 = (inst->inst >> 13) & 0x7f;
1567	+	const int r3 = (inst->inst >> 20) & 0x7f;
1568	+
1569	+	const int x2a = (inst->inst >> 34) & 0x3;
1570	+	const int x2b = (inst->inst >> 27) & 0x3;
1571	+	const int x4 = (inst->inst >> 29) & 0xf;
1572	+	const int ve = (inst->inst >> 33) & 0x1;
1573	+
1574	+	// destination register (r1) is always valid in this group
1575	+	inst->operands[0].valid = true;
1576	+	inst->operands[0].index = r1;
1577	+
1578	+	// source register (r3) is always valid in this group
1579	+	inst->operands[2].valid = true;
1580	+	inst->operands[2].index = r3;
1581	+	inst->operands[2].value = IA64_GET_GR(r3);
1582	+	inst->operands[2].nat = IA64_GET_NAT(r3);
1583	+
1584	+	if (x2a == 0 && ve == 0) {
1585	+	inst->operands[1].valid = true;
1586	+	inst->operands[1].index = r2;
1587	+	inst->operands[1].value = IA64_GET_GR(r2);
1588	+	inst->operands[1].nat = IA64_GET_NAT(r2);
1589	+	switch (x4) {
1590	+	case 0x0: // add (A1)
1591	+	inst->mnemo = IA64_INST_ADD;
1592	+	inst->operands[3].valid = true;
1593	+	inst->operands[3].index = -1;
1594	+	inst->operands[3].value = x2b == 1;
1595	+	return true;
1596	+	case 0x1: // add (A1)
1597	+	inst->mnemo = IA64_INST_SUB;
1598	+	inst->operands[3].valid = true;
1599	+	inst->operands[3].index = -1;
1600	+	inst->operands[3].value = x2b == 0;
1601	+	return true;
1602	+	case 0x4: // shladd (A2)
1603	+	inst->mnemo = IA64_INST_SHLADD;
1604	+	inst->operands[3].valid = true;
1605	+	inst->operands[3].index = -1;
1606	+	inst->operands[3].value = ia64_inst_get_count2(inst->inst);
1607	+	return true;
1608	+	case 0x9:
1609	+	if (x2b == 1) {
1610	+	inst->mnemo = IA64_INST_SUB;
1611	+	inst->operands[1].index = -1;
1612	+	inst->operands[1].value = ia64_inst_get_imm8(inst->inst);
1613	+	inst->operands[1].nat = 0;
1614	+	return true;
1615	+	}
1616	+	break;
1617	+	case 0xb:
1618	+	inst->operands[1].index = -1;
1619	+	inst->operands[1].value = ia64_inst_get_imm8(inst->inst);
1620	+	inst->operands[1].nat = 0;
1621	+	// fall-through
1622	+	case 0x3:
1623	+	switch (x2b) {
1624	+	case 0: inst->mnemo = IA64_INST_AND; break;
1625	+	case 1: inst->mnemo = IA64_INST_ANDCM; break;
1626	+	case 2: inst->mnemo = IA64_INST_OR; break;
1627	+	case 3: inst->mnemo = IA64_INST_XOR; break;
1628	+	}
1629	+	return true;
1630	+	}
1631	+	}
1632	+	return false;
1633	+	}
1634	+
1635	+	// Decode instruction
1636	+	static bool ia64_decode_instruction(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1637	+	{
1638	+	const int major = (inst->inst >> 37) & 0xf;
1639	+
1640	+	inst->mnemo = IA64_INST_UNKNOWN;
1641	+	inst->pred = inst->inst & 0x3f;
1642	+	memset(&inst->operands[0], 0, sizeof(inst->operands));
1643	+
1644	+	switch (major) {
1645	+	case 0x0: return ia64_decode_instruction_0(inst, IA64_CONTEXT);
1646	+	case 0x4: return ia64_decode_instruction_4(inst, IA64_CONTEXT);
1647	+	case 0x5: return ia64_decode_instruction_5(inst, IA64_CONTEXT);
1648	+	case 0x8: return ia64_decode_instruction_8(inst, IA64_CONTEXT);
1649	+	}
1650	+	return false;
1651	+	}
1652	+
1653	+	static bool ia64_emulate_instruction(ia64_instruction_t *inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1654	+	{
1655	+	// XXX: handle Register NaT Consumption fault?
1656	+	// XXX: this simple emulator assumes instructions in a bundle
1657	+	// don't depend on effects of other instructions in the same
1658	+	// bundle. It probably would be simpler to JIT-generate code to be
1659	+	// executed natively but probably more costly (inject/extract CPU state)
1660	+	if (inst->mnemo == IA64_INST_UNKNOWN)
1661	+	return false;
1662	+	if (inst->pred && !IA64_GET_PR(inst->pred))
1663	+	return true;
1664	+
1665	+	unsigned char nat, nat2;
1666	+	unsigned long dst, dst2, src1, src2, src3;
1667	+
1668	+	switch (inst->mnemo) {
1669	+	case IA64_INST_NOP:
1670	+	break;
1671	+	case IA64_INST_ADD:
1672	+	case IA64_INST_SUB:
1673	+	case IA64_INST_SHLADD:
1674	+	src3 = inst->operands[3].value;
1675	+	// fall-through
1676	+	case IA64_INST_AND:
1677	+	case IA64_INST_ANDCM:
1678	+	case IA64_INST_OR:
1679	+	case IA64_INST_XOR:
1680	+	src1 = inst->operands[1].value;
1681	+	src2 = inst->operands[2].value;
1682	+	switch (inst->mnemo) {
1683	+	case IA64_INST_ADD: dst = src1 + src2 + src3; break;
1684	+	case IA64_INST_SUB: dst = src1 - src2 - src3; break;
1685	+	case IA64_INST_SHLADD: dst = (src1 << src3) + src2; break;
1686	+	case IA64_INST_AND: dst = src1 & src2; break;
1687	+	case IA64_INST_ANDCM: dst = src1 &~ src2; break;
1688	+	case IA64_INST_OR: dst = src1 \| src2; break;
1689	+	case IA64_INST_XOR: dst = src1 ^ src2; break;
1690	+	}
1691	+	inst->operands[0].commit = true;
1692	+	inst->operands[0].value = dst;
1693	+	inst->operands[0].nat = inst->operands[1].nat \| inst->operands[2].nat;
1694	+	break;
1695	+	case IA64_INST_SXT1:
1696	+	case IA64_INST_SXT2:
1697	+	case IA64_INST_SXT4:
1698	+	case IA64_INST_ZXT1:
1699	+	case IA64_INST_ZXT2:
1700	+	case IA64_INST_ZXT4:
1701	+	src1 = inst->operands[1].value;
1702	+	switch (inst->mnemo) {
1703	+	case IA64_INST_SXT1: dst = (signed long)(signed char)src1; break;
1704	+	case IA64_INST_SXT2: dst = (signed long)(signed short)src1; break;
1705	+	case IA64_INST_SXT4: dst = (signed long)(signed int)src1; break;
1706	+	case IA64_INST_ZXT1: dst = (unsigned char)src1; break;
1707	+	case IA64_INST_ZXT2: dst = (unsigned short)src1; break;
1708	+	case IA64_INST_ZXT4: dst = (unsigned int)src1; break;
1709	+	}
1710	+	inst->operands[0].commit = true;
1711	+	inst->operands[0].value = dst;
1712	+	inst->operands[0].nat = inst->operands[1].nat;
1713	+	break;
1714	+	case IA64_INST_LD1_UPDATE:
1715	+	case IA64_INST_LD2_UPDATE:
1716	+	case IA64_INST_LD4_UPDATE:
1717	+	case IA64_INST_LD8_UPDATE:
1718	+	inst->operands[1].commit = true;
1719	+	dst2 = inst->operands[1].value + inst->operands[2].value;
1720	+	nat2 = inst->operands[2].nat ? inst->operands[2].nat : 0;
1721	+	// fall-through
1722	+	case IA64_INST_LD1:
1723	+	case IA64_INST_LD2:
1724	+	case IA64_INST_LD4:
1725	+	case IA64_INST_LD8:
1726	+	src1 = inst->operands[1].value;
1727	+	if (inst->no_memory)
1728	+	dst = 0;
1729	+	else {
1730	+	switch (inst->mnemo) {
1731	+	case IA64_INST_LD1: case IA64_INST_LD1_UPDATE: dst = ((unsigned char )src1); break;
1732	+	case IA64_INST_LD2: case IA64_INST_LD2_UPDATE: dst = ((unsigned short )src1); break;
1733	+	case IA64_INST_LD4: case IA64_INST_LD4_UPDATE: dst = ((unsigned int )src1); break;
1734	+	case IA64_INST_LD8: case IA64_INST_LD8_UPDATE: dst = ((unsigned long )src1); break;
1735	+	}
1736	+	}
1737	+	inst->operands[0].commit = true;
1738	+	inst->operands[0].value = dst;
1739	+	inst->operands[0].nat = 0;
1740	+	inst->operands[1].value = dst2;
1741	+	inst->operands[1].nat = nat2;
1742	+	break;
1743	+	case IA64_INST_ST1_UPDATE:
1744	+	case IA64_INST_ST2_UPDATE:
1745	+	case IA64_INST_ST4_UPDATE:
1746	+	case IA64_INST_ST8_UPDATE:
1747	+	inst->operands[0].commit = 0;
1748	+	dst2 = inst->operands[0].value + inst->operands[2].value;
1749	+	nat2 = inst->operands[2].nat ? inst->operands[2].nat : 0;
1750	+	// fall-through
1751	+	case IA64_INST_ST1:
1752	+	case IA64_INST_ST2:
1753	+	case IA64_INST_ST4:
1754	+	case IA64_INST_ST8:
1755	+	dst = inst->operands[0].value;
1756	+	src1 = inst->operands[1].value;
1757	+	if (!inst->no_memory) {
1758	+	switch (inst->mnemo) {
1759	+	case IA64_INST_ST1: case IA64_INST_ST1_UPDATE: ((unsigned char )dst) = src1; break;
1760	+	case IA64_INST_ST2: case IA64_INST_ST2_UPDATE: ((unsigned short )dst) = src1; break;
1761	+	case IA64_INST_ST4: case IA64_INST_ST4_UPDATE: ((unsigned int )dst) = src1; break;
1762	+	case IA64_INST_ST8: case IA64_INST_ST8_UPDATE: ((unsigned long )dst) = src1; break;
1763	+	}
1764	+	}
1765	+	inst->operands[0].value = dst2;
1766	+	inst->operands[0].nat = nat2;
1767	+	break;
1768	+	default:
1769	+	return false;
1770	+	}
1771	+
1772	+	for (int i = 0; i < IA64_N_OPERANDS; i++) {
1773	+	ia64_operand_t const & op = inst->operands[i];
1774	+	if (!op.commit)
1775	+	continue;
1776	+	if (op.index == -1)
1777	+	return false; // XXX: internal error
1778	+	IA64_SET_GR(op.index, op.value);
1779	+	IA64_SET_NAT(op.index, op.nat);
1780	+	}
1781	+	return true;
1782	+	}
1783	+
1784	+	static bool ia64_emulate_instruction(unsigned long raw_inst, IA64_CONTEXT_TYPE IA64_CONTEXT)
1785	+	{
1786	+	ia64_instruction_t inst;
1787	+	memset(&inst, 0, sizeof(inst));
1788	+	inst.inst = raw_inst;
1789	+	if (!ia64_decode_instruction(&inst, IA64_CONTEXT))
1790	+	return false;
1791	+	return ia64_emulate_instruction(&inst, IA64_CONTEXT);
1792	+	}
1793	+
1794	+	static bool ia64_skip_instruction(IA64_CONTEXT_TYPE IA64_CONTEXT)
1795	+	{
1796	+	unsigned long ip = IA64_GET_IP();
1797	+	#if DEBUG
1798	+	printf("IP: 0x%016lx\n", ip);
1799	+	#if 0
1800	+	printf(" Template 0x%02x\n", ia64_get_template(ip));
1801	+	ia64_get_instruction(ip, 0);
1802	+	ia64_get_instruction(ip, 1);
1803	+	ia64_get_instruction(ip, 2);
1804	+	#endif
1805	+	#endif
1806	+
1807	+	// Select which decode switch to use
1808	+	ia64_instruction_t inst;
1809	+	inst.inst = ia64_get_instruction(ip, ip & 3);
1810	+	if (!ia64_decode_instruction(&inst, IA64_CONTEXT)) {
1811	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): could not decode instruction\n");
1812	+	return false;
1813	+	}
1814	+
1815	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1816	+	transfer_size_t transfer_size = SIZE_UNKNOWN;
1817	+
1818	+	switch (inst.mnemo) {
1819	+	case IA64_INST_LD1:
1820	+	case IA64_INST_LD2:
1821	+	case IA64_INST_LD4:
1822	+	case IA64_INST_LD8:
1823	+	case IA64_INST_LD1_UPDATE:
1824	+	case IA64_INST_LD2_UPDATE:
1825	+	case IA64_INST_LD4_UPDATE:
1826	+	case IA64_INST_LD8_UPDATE:
1827	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1828	+	break;
1829	+	case IA64_INST_ST1:
1830	+	case IA64_INST_ST2:
1831	+	case IA64_INST_ST4:
1832	+	case IA64_INST_ST8:
1833	+	case IA64_INST_ST1_UPDATE:
1834	+	case IA64_INST_ST2_UPDATE:
1835	+	case IA64_INST_ST4_UPDATE:
1836	+	case IA64_INST_ST8_UPDATE:
1837	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1838	+	break;
1839	+	}
1840	+
1841	+	if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1842	+	// Unknown machine code, let it crash. Then patch the decoder
1843	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): not a load/store instruction\n");
1844	+	return false;
1845	+	}
1846	+
1847	+	switch (inst.mnemo) {
1848	+	case IA64_INST_LD1:
1849	+	case IA64_INST_LD1_UPDATE:
1850	+	case IA64_INST_ST1:
1851	+	case IA64_INST_ST1_UPDATE:
1852	+	transfer_size = SIZE_BYTE;
1853	+	break;
1854	+	case IA64_INST_LD2:
1855	+	case IA64_INST_LD2_UPDATE:
1856	+	case IA64_INST_ST2:
1857	+	case IA64_INST_ST2_UPDATE:
1858	+	transfer_size = SIZE_WORD;
1859	+	break;
1860	+	case IA64_INST_LD4:
1861	+	case IA64_INST_LD4_UPDATE:
1862	+	case IA64_INST_ST4:
1863	+	case IA64_INST_ST4_UPDATE:
1864	+	transfer_size = SIZE_LONG;
1865	+	break;
1866	+	case IA64_INST_LD8:
1867	+	case IA64_INST_LD8_UPDATE:
1868	+	case IA64_INST_ST8:
1869	+	case IA64_INST_ST8_UPDATE:
1870	+	transfer_size = SIZE_QUAD;
1871	+	break;
1872	+	}
1873	+
1874	+	if (transfer_size == SIZE_UNKNOWN) {
1875	+	// Unknown machine code, let it crash. Then patch the decoder
1876	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): unknown transfer size\n");
1877	+	return false;
1878	+	}
1879	+
1880	+	inst.no_memory = true;
1881	+	if (!ia64_emulate_instruction(&inst, IA64_CONTEXT)) {
1882	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): could not emulate fault instruction\n");
1883	+	return false;
1884	+	}
1885	+
1886	+	int slot = ip & 3;
1887	+	bool emulate_next = false;
1888	+	switch (slot) {
1889	+	case 0:
1890	+	switch (ia64_get_template(ip)) {
1891	+	case 0x2: // MI;I
1892	+	case 0x3: // MI;I;
1893	+	emulate_next = true;
1894	+	slot = 2;
1895	+	break;
1896	+	case 0xa: // M;MI
1897	+	case 0xb: // M;MI;
1898	+	emulate_next = true;
1899	+	slot = 1;
1900	+	break;
1901	+	}
1902	+	break;
1903	+	}
1904	+	if (emulate_next && !IA64_CAN_PATCH_IP_SLOT) {
1905	+	while (slot < 3) {
1906	+	if (!ia64_emulate_instruction(ia64_get_instruction(ip, slot), IA64_CONTEXT)) {
1907	+	fprintf(stderr, "ERROR: ia64_skip_instruction(): could not emulate instruction\n");
1908	+	return false;
1909	+	}
1910	+	++slot;
1911	+	}
1912	+	}
1913	+
1914	+	#if IA64_CAN_PATCH_IP_SLOT
1915	+	if ((slot = ip & 3) < 2)
1916	+	IA64_SET_IP((ip & ~3ul) + (slot + 1));
1917	+	else
1918	+	#endif
1919	+	IA64_SET_IP((ip & ~3ul) + 16);
1920	+	#if DEBUG
1921	+	printf("IP: 0x%016lx\n", IA64_GET_IP());
1922	+	#endif
1923	+	return true;
1924	+	}
1925	+	#endif
1926	+
1927		// Decode and skip PPC instruction
1928	<	#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__))
1929	<	static bool powerpc_skip_instruction(unsigned int * nip_p, unsigned int * regs)
1928	>	#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__) \|\| defined(__ppc64__))
1929	>	static bool powerpc_skip_instruction(unsigned long * nip_p, unsigned long * regs)
1930		{
1931		instruction_t instr;
1932		powerpc_decode_instruction(&instr, *nip_p, regs);
#	Line 954 \| Line 1938 \| static bool powerpc_skip_instruction(uns
1938
1939		#if DEBUG
1940		printf("%08x: %s %s access", *nip_p,
1941	<	instr.transfer_size == SIZE_BYTE ? "byte" : instr.transfer_size == SIZE_WORD ? "word" : "long",
1941	>	instr.transfer_size == SIZE_BYTE ? "byte" :
1942	>	instr.transfer_size == SIZE_WORD ? "word" :
1943	>	instr.transfer_size == SIZE_LONG ? "long" : "quad",
1944		instr.transfer_type == SIGSEGV_TRANSFER_LOAD ? "read" : "write");
1945
1946		if (instr.addr_mode == MODE_U \|\| instr.addr_mode == MODE_UX)
#	Line 975 \| Line 1961 \| static bool powerpc_skip_instruction(uns
1961
1962		// Decode and skip MIPS instruction
1963		#if (defined(mips) \|\| defined(__mips))
1964	<	enum {
979	<	#if (defined(sgi) \|\| defined(__sgi))
980	<	MIPS_REG_EPC = 35,
981	<	#endif
982	<	};
983	<	static bool mips_skip_instruction(greg_t * regs)
1964	>	static bool mips_skip_instruction(greg_t * pc_p, greg_t * regs)
1965		{
1966	<	unsigned int * epc = (unsigned int *)(unsigned long)regs[MIPS_REG_EPC];
1966	>	unsigned int * epc = (unsigned int )(unsigned long)pc_p;
1967
1968		if (epc == 0)
1969		return false;
#	Line 1131 \| Line 2112 \| static bool mips_skip_instruction(greg_t
2112		mips_gpr_names[reg]);
2113		#endif
2114
2115	<	regs[MIPS_REG_EPC] += 4;
2115	>	*pc_p += 4;
2116		return true;
2117		}
2118		#endif
#	Line 1143 \| Line 2124 \| enum {
2124		SPARC_REG_G1 = REG_G1,
2125		SPARC_REG_O0 = REG_O0,
2126		SPARC_REG_PC = REG_PC,
2127	+	SPARC_REG_nPC = REG_nPC
2128		#endif
2129		};
2130		static bool sparc_skip_instruction(unsigned long * regs, gwindows_t * gwins, struct rwindow * rwin)
#	Line 1206 \| Line 2188 \| static bool sparc_skip_instruction(unsig
2188		break;
2189		case 7: // Store Doubleword
2190		transfer_type = SIGSEGV_TRANSFER_STORE;
2191	<	transfer_size = SIZE_WORD;
2191	>	transfer_size = SIZE_LONG;
2192		register_pair = true;
2193		break;
2194		}
#	Line 1216 \| Line 2198 \| static bool sparc_skip_instruction(unsig
2198		return false;
2199		}
2200
1219	–	// Zero target register in case of a load operation
2201		const int reg = (opcode >> 25) & 0x1f;
2202	+
2203	+	#if DEBUG
2204	+	static const char * reg_names[] = {
2205	+	"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
2206	+	"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
2207	+	"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
2208	+	"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7"
2209	+	};
2210	+	printf("%s %s register %s\n",
2211	+	transfer_size == SIZE_BYTE ? "byte" :
2212	+	transfer_size == SIZE_WORD ? "word" :
2213	+	transfer_size == SIZE_LONG ? "long" :
2214	+	transfer_size == SIZE_QUAD ? "quad" : "unknown",
2215	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
2216	+	reg_names[reg]);
2217	+	#endif
2218	+
2219	+	// Zero target register in case of a load operation
2220		if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != 0) {
2221		// FIXME: code to handle local & input registers is not tested
2222	<	if (reg >= 1 && reg <= 7) {
2222	>	if (reg >= 1 && reg < 8) {
2223		// global registers
2224		regs[reg - 1 + SPARC_REG_G1] = 0;
2225		}
2226	<	else if (reg >= 8 && reg <= 15) {
2226	>	else if (reg >= 8 && reg < 16) {
2227		// output registers
2228		regs[reg - 8 + SPARC_REG_O0] = 0;
2229		}
2230	<	else if (reg >= 16 && reg <= 23) {
2230	>	else if (reg >= 16 && reg < 24) {
2231		// local registers (in register windows)
2232		if (gwins)
2233		gwins->wbuf->rw_local[reg - 16] = 0;
#	Line 1244 \| Line 2243 \| static bool sparc_skip_instruction(unsig
2243		}
2244		}
2245
1247	–	#if DEBUG
1248	–	static const char * reg_names[] = {
1249	–	"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
1250	–	"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
1251	–	"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
1252	–	"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7"
1253	–	};
1254	–	printf("%s %s register %s\n",
1255	–	transfer_size == SIZE_BYTE ? "byte" :
1256	–	transfer_size == SIZE_WORD ? "word" :
1257	–	transfer_size == SIZE_LONG ? "long" :
1258	–	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1259	–	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1260	–	reg_names[reg]);
1261	–	#endif
1262	–
2246		regs[SPARC_REG_PC] += 4;
2247	+	regs[SPARC_REG_nPC] += 4;
2248		return true;
2249		}
2250		#endif
#	Line 1416 \| Line 2400 \| static bool arm_skip_instruction(unsigne
2400
2401
2402		// Fallbacks
2403	+	#ifndef SIGSEGV_FAULT_ADDRESS_FAST
2404	+	#define SIGSEGV_FAULT_ADDRESS_FAST SIGSEGV_FAULT_ADDRESS
2405	+	#endif
2406	+	#ifndef SIGSEGV_FAULT_INSTRUCTION_FAST
2407	+	#define SIGSEGV_FAULT_INSTRUCTION_FAST SIGSEGV_FAULT_INSTRUCTION
2408	+	#endif
2409		#ifndef SIGSEGV_FAULT_INSTRUCTION
2410	<	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_INVALID_PC
2410	>	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_INVALID_ADDRESS
2411		#endif
2412		#ifndef SIGSEGV_FAULT_HANDLER_ARGLIST_1
2413		#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 SIGSEGV_FAULT_HANDLER_ARGLIST
2414		#endif
2415		#ifndef SIGSEGV_FAULT_HANDLER_INVOKE
2416	<	#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP) sigsegv_fault_handler(ADDR, IP)
2416	>	#define SIGSEGV_FAULT_HANDLER_INVOKE(P) sigsegv_fault_handler(P)
2417		#endif
2418
2419		// SIGSEGV recovery supported ?
#	Line 1436 \| Line 2426 \| static bool arm_skip_instruction(unsigne
2426		* SIGSEGV global handler
2427		*/
2428
2429	<	#if defined(HAVE_SIGSEGV_RECOVERY) \|\| defined(HAVE_MACH_EXCEPTIONS)
2429	>	struct sigsegv_info_t {
2430	>	sigsegv_address_t addr;
2431	>	sigsegv_address_t pc;
2432	>	#ifdef HAVE_MACH_EXCEPTIONS
2433	>	mach_port_t thread;
2434	>	bool has_exc_state;
2435	>	SIGSEGV_EXCEPTION_STATE_TYPE exc_state;
2436	>	mach_msg_type_number_t exc_state_count;
2437	>	bool has_thr_state;
2438	>	SIGSEGV_THREAD_STATE_TYPE thr_state;
2439	>	mach_msg_type_number_t thr_state_count;
2440	>	#endif
2441	>	};
2442	>
2443	>	#ifdef HAVE_MACH_EXCEPTIONS
2444	>	static void mach_get_exception_state(sigsegv_info_t *SIP)
2445	>	{
2446	>	SIP->exc_state_count = SIGSEGV_EXCEPTION_STATE_COUNT;
2447	>	kern_return_t krc = thread_get_state(SIP->thread,
2448	>	SIGSEGV_EXCEPTION_STATE_FLAVOR,
2449	>	(natural_t *)&SIP->exc_state,
2450	>	&SIP->exc_state_count);
2451	>	MACH_CHECK_ERROR(thread_get_state, krc);
2452	>	SIP->has_exc_state = true;
2453	>	}
2454	>
2455	>	static void mach_get_thread_state(sigsegv_info_t *SIP)
2456	>	{
2457	>	SIP->thr_state_count = SIGSEGV_THREAD_STATE_COUNT;
2458	>	kern_return_t krc = thread_get_state(SIP->thread,
2459	>	SIGSEGV_THREAD_STATE_FLAVOR,
2460	>	(natural_t *)&SIP->thr_state,
2461	>	&SIP->thr_state_count);
2462	>	MACH_CHECK_ERROR(thread_get_state, krc);
2463	>	SIP->has_thr_state = true;
2464	>	}
2465	>
2466	>	static void mach_set_thread_state(sigsegv_info_t *SIP)
2467	>	{
2468	>	kern_return_t krc = thread_set_state(SIP->thread,
2469	>	SIGSEGV_THREAD_STATE_FLAVOR,
2470	>	(natural_t *)&SIP->thr_state,
2471	>	SIP->thr_state_count);
2472	>	MACH_CHECK_ERROR(thread_set_state, krc);
2473	>	}
2474	>	#endif
2475	>
2476	>	// Return the address of the invalid memory reference
2477	>	sigsegv_address_t sigsegv_get_fault_address(sigsegv_info_t *SIP)
2478	>	{
2479	>	#ifdef HAVE_MACH_EXCEPTIONS
2480	>	static int use_fast_path = -1;
2481	>	if (use_fast_path != 1 && !SIP->has_exc_state) {
2482	>	mach_get_exception_state(SIP);
2483	>
2484	>	sigsegv_address_t addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
2485	>	if (use_fast_path < 0) {
2486	>	const char *machfault = getenv("SIGSEGV_MACH_FAULT");
2487	>	if (machfault) {
2488	>	if (strcmp(machfault, "fast") == 0)
2489	>	use_fast_path = 1;
2490	>	else if (strcmp(machfault, "slow") == 0)
2491	>	use_fast_path = 0;
2492	>	}
2493	>	if (use_fast_path < 0)
2494	>	use_fast_path = addr == SIP->addr;
2495	>	}
2496	>	SIP->addr = addr;
2497	>	}
2498	>	#endif
2499	>	return SIP->addr;
2500	>	}
2501	>
2502	>	// Return the address of the instruction that caused the fault, or
2503	>	// SIGSEGV_INVALID_ADDRESS if we could not retrieve this information
2504	>	sigsegv_address_t sigsegv_get_fault_instruction_address(sigsegv_info_t *SIP)
2505	>	{
2506	>	#ifdef HAVE_MACH_EXCEPTIONS
2507	>	if (!SIP->has_thr_state) {
2508	>	mach_get_thread_state(SIP);
2509	>
2510	>	SIP->pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
2511	>	}
2512	>	#endif
2513	>	return SIP->pc;
2514	>	}
2515	>
2516		// This function handles the badaccess to memory.
2517		// It is called from the signal handler or the exception handler.
2518		static bool handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGLIST_1)
2519		{
2520	<	sigsegv_address_t fault_address = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
2521	<	sigsegv_address_t fault_instruction = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
2522	<
2520	>	sigsegv_info_t SI;
2521	>	SI.addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS_FAST;
2522	>	SI.pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION_FAST;
2523	>	#ifdef HAVE_MACH_EXCEPTIONS
2524	>	SI.thread = thread;
2525	>	SI.has_exc_state = false;
2526	>	SI.has_thr_state = false;
2527	>	#endif
2528	>	sigsegv_info_t * const SIP = &SI;
2529	>
2530		// Call user's handler and reinstall the global handler, if required
2531	<	switch (SIGSEGV_FAULT_HANDLER_INVOKE(fault_address, fault_instruction)) {
2531	>	switch (SIGSEGV_FAULT_HANDLER_INVOKE(SIP)) {
2532		case SIGSEGV_RETURN_SUCCESS:
2533		return true;
2534
#	Line 1453 \| Line 2536 \| static bool handle_badaccess(SIGSEGV_FAU
2536		case SIGSEGV_RETURN_SKIP_INSTRUCTION:
2537		// Call the instruction skipper with the register file
2538		// available
2539	+	#ifdef HAVE_MACH_EXCEPTIONS
2540	+	if (!SIP->has_thr_state)
2541	+	mach_get_thread_state(SIP);
2542	+	#endif
2543		if (SIGSEGV_SKIP_INSTRUCTION(SIGSEGV_REGISTER_FILE)) {
2544		#ifdef HAVE_MACH_EXCEPTIONS
2545		// Unlike UNIX signals where the thread state
2546		// is modified off of the stack, in Mach we
2547		// need to actually call thread_set_state to
2548		// have the register values updated.
2549	<	kern_return_t krc;
1463	<
1464	<	krc = thread_set_state(thread,
1465	<	MACHINE_THREAD_STATE, (thread_state_t)state,
1466	<	MACHINE_THREAD_STATE_COUNT);
1467	<	MACH_CHECK_ERROR (thread_get_state, krc);
2549	>	mach_set_thread_state(SIP);
2550		#endif
2551		return true;
2552		}
2553		break;
2554		#endif
2555		case SIGSEGV_RETURN_FAILURE:
2556	<	return false;
2556	>	// We can't do anything with the fault_address, dump state?
2557	>	if (sigsegv_state_dumper != 0)
2558	>	sigsegv_state_dumper(SIP);
2559	>	break;
2560		}
1476	–
1477	–	// We can't do anything with the fault_address, dump state?
1478	–	if (sigsegv_state_dumper != 0)
1479	–	sigsegv_state_dumper(fault_address, fault_instruction);
2561
2562		return false;
2563		}
1483	–	#endif
2564
2565
2566		/*
#	Line 1517 \| Line 2597 \| forward_exception(mach_port_t thread_por
2597		mach_port_t port;
2598		exception_behavior_t behavior;
2599		thread_state_flavor_t flavor;
2600	<	thread_state_t thread_state;
2600	>	thread_state_data_t thread_state;
2601		mach_msg_type_number_t thread_state_count;
2602
2603		for (portIndex = 0; portIndex < oldExceptionPorts->maskCount; portIndex++) {
#	Line 1536 \| Line 2616 \| forward_exception(mach_port_t thread_por
2616		behavior = oldExceptionPorts->behaviors[portIndex];
2617		flavor = oldExceptionPorts->flavors[portIndex];
2618
2619	+	if (!VALID_THREAD_STATE_FLAVOR(flavor)) {
2620	+	fprintf(stderr, "Invalid thread_state flavor = %d. Not forwarding\n", flavor);
2621	+	return KERN_FAILURE;
2622	+	}
2623	+
2624		/*
2625		fprintf(stderr, "forwarding exception, port = 0x%x, behaviour = %d, flavor = %d\n", port, behavior, flavor);
2626		*/
2627
2628		if (behavior != EXCEPTION_DEFAULT) {
2629		thread_state_count = THREAD_STATE_MAX;
2630	<	kret = thread_get_state (thread_port, flavor, thread_state,
2630	>	kret = thread_get_state (thread_port, flavor, (natural_t *)&thread_state,
2631		&thread_state_count);
2632		MACH_CHECK_ERROR (thread_get_state, kret);
2633		}
#	Line 1558 \| Line 2643 \| forward_exception(mach_port_t thread_por
2643		// fprintf(stderr, "forwarding to exception_raise_state\n");
2644		kret = exception_raise_state(port, exception_type, exception_data,
2645		data_count, &flavor,
2646	<	thread_state, thread_state_count,
2647	<	thread_state, &thread_state_count);
2646	>	(natural_t *)&thread_state, thread_state_count,
2647	>	(natural_t *)&thread_state, &thread_state_count);
2648		MACH_CHECK_ERROR (exception_raise_state, kret);
2649		break;
2650		case EXCEPTION_STATE_IDENTITY:
#	Line 1567 \| Line 2652 \| forward_exception(mach_port_t thread_por
2652		kret = exception_raise_state_identity(port, thread_port, task_port,
2653		exception_type, exception_data,
2654		data_count, &flavor,
2655	<	thread_state, thread_state_count,
2656	<	thread_state, &thread_state_count);
2655	>	(natural_t *)&thread_state, thread_state_count,
2656	>	(natural_t *)&thread_state, &thread_state_count);
2657		MACH_CHECK_ERROR (exception_raise_state_identity, kret);
2658		break;
2659		default:
2660		fprintf(stderr, "forward_exception got unknown behavior\n");
2661	+	kret = KERN_FAILURE;
2662		break;
2663		}
2664
2665		if (behavior != EXCEPTION_DEFAULT) {
2666	<	kret = thread_set_state (thread_port, flavor, thread_state,
2666	>	kret = thread_set_state (thread_port, flavor, (natural_t *)&thread_state,
2667		thread_state_count);
2668		MACH_CHECK_ERROR (thread_set_state, kret);
2669		}
2670
2671	<	return KERN_SUCCESS;
2671	>	return kret;
2672		}
2673
2674		/*
#	Line 1610 \| Line 2696 \| catch_exception_raise(mach_port_t except
2696		mach_port_t task,
2697		exception_type_t exception,
2698		exception_data_t code,
2699	<	mach_msg_type_number_t codeCount)
2699	>	mach_msg_type_number_t code_count)
2700		{
1615	–	ppc_thread_state_t state;
2701		kern_return_t krc;
2702
2703	<	if ((exception == EXC_BAD_ACCESS) && (codeCount >= 2)) {
2704	<	if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
2705	<	return KERN_SUCCESS;
2703	>	if (exception == EXC_BAD_ACCESS) {
2704	>	switch (code[0]) {
2705	>	case KERN_PROTECTION_FAILURE:
2706	>	case KERN_INVALID_ADDRESS:
2707	>	if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
2708	>	return KERN_SUCCESS;
2709	>	break;
2710	>	}
2711		}
2712
2713		// In Mach we do not need to remove the exception handler.
2714		// If we forward the exception, eventually some exception handler
2715		// will take care of this exception.
2716	<	krc = forward_exception(thread, task, exception, code, codeCount, &ports);
2716	>	krc = forward_exception(thread, task, exception, code, code_count, &ports);
2717
2718		return krc;
2719		}
#	Line 1751 \| Line 2841 \| static bool sigsegv_do_install_handler(s
2841		// addressing modes) used in PPC instructions, you will need the
2842		// GPR state anyway.
2843		krc = thread_set_exception_ports(mach_thread_self(), EXC_MASK_BAD_ACCESS, _exceptionPort,
2844	<	EXCEPTION_DEFAULT, MACHINE_THREAD_STATE);
2844	>	EXCEPTION_DEFAULT, SIGSEGV_THREAD_STATE_FLAVOR);
2845		if (krc != KERN_SUCCESS) {
2846		mach_error("thread_set_exception_ports", krc);
2847		return false;
#	Line 1774 \| Line 2864 \| static bool sigsegv_do_install_handler(s
2864		}
2865		#endif
2866
2867	+	#ifdef HAVE_WIN32_EXCEPTIONS
2868	+	static LONG WINAPI main_exception_filter(EXCEPTION_POINTERS *ExceptionInfo)
2869	+	{
2870	+	if (sigsegv_fault_handler != NULL
2871	+	&& ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION
2872	+	&& ExceptionInfo->ExceptionRecord->NumberParameters == 2
2873	+	&& handle_badaccess(ExceptionInfo))
2874	+	return EXCEPTION_CONTINUE_EXECUTION;
2875	+
2876	+	return EXCEPTION_CONTINUE_SEARCH;
2877	+	}
2878	+
2879	+	#if defined __CYGWIN__ && defined __i386__
2880	+	/* In Cygwin programs, SetUnhandledExceptionFilter has no effect because Cygwin
2881	+	installs a global exception handler. We have to dig deep in order to install
2882	+	our main_exception_filter. */
2883	+
2884	+	/* Data structures for the current thread's exception handler chain.
2885	+	On the x86 Windows uses register fs, offset 0 to point to the current
2886	+	exception handler; Cygwin mucks with it, so we must do the same... :-/ */
2887	+
2888	+	/* Magic taken from winsup/cygwin/include/exceptions.h. */
2889	+
2890	+	struct exception_list {
2891	+	struct exception_list *prev;
2892	+	int (handler) (EXCEPTION_RECORD , void , CONTEXT , void *);
2893	+	};
2894	+	typedef struct exception_list exception_list;
2895	+
2896	+	/* Magic taken from winsup/cygwin/exceptions.cc. */
2897	+
2898	+	__asm__ (".equ __except_list,0");
2899	+
2900	+	extern exception_list *_except_list __asm__ ("%fs:__except_list");
2901	+
2902	+	/* For debugging. _except_list is not otherwise accessible from gdb. */
2903	+	static exception_list *
2904	+	debug_get_except_list ()
2905	+	{
2906	+	return _except_list;
2907	+	}
2908	+
2909	+	/* Cygwin's original exception handler. */
2910	+	static int (cygwin_exception_handler) (EXCEPTION_RECORD , void , CONTEXT , void *);
2911	+
2912	+	/* Our exception handler. */
2913	+	static int
2914	+	libsigsegv_exception_handler (EXCEPTION_RECORD exception, void frame, CONTEXT context, void dispatch)
2915	+	{
2916	+	EXCEPTION_POINTERS ExceptionInfo;
2917	+	ExceptionInfo.ExceptionRecord = exception;
2918	+	ExceptionInfo.ContextRecord = context;
2919	+	if (main_exception_filter (&ExceptionInfo) == EXCEPTION_CONTINUE_SEARCH)
2920	+	return cygwin_exception_handler (exception, frame, context, dispatch);
2921	+	else
2922	+	return 0;
2923	+	}
2924	+
2925	+	static void
2926	+	do_install_main_exception_filter ()
2927	+	{
2928	+	/* We cannot insert any handler into the chain, because such handlers
2929	+	must lie on the stack (?). Instead, we have to replace(!) Cygwin's
2930	+	global exception handler. */
2931	+	cygwin_exception_handler = _except_list->handler;
2932	+	_except_list->handler = libsigsegv_exception_handler;
2933	+	}
2934	+
2935	+	#else
2936	+
2937	+	static void
2938	+	do_install_main_exception_filter ()
2939	+	{
2940	+	SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) &main_exception_filter);
2941	+	}
2942	+	#endif
2943	+
2944	+	static bool sigsegv_do_install_handler(sigsegv_fault_handler_t handler)
2945	+	{
2946	+	static bool main_exception_filter_installed = false;
2947	+	if (!main_exception_filter_installed) {
2948	+	do_install_main_exception_filter();
2949	+	main_exception_filter_installed = true;
2950	+	}
2951	+	sigsegv_fault_handler = handler;
2952	+	return true;
2953	+	}
2954	+	#endif
2955	+
2956		bool sigsegv_install_handler(sigsegv_fault_handler_t handler)
2957		{
2958		#if defined(HAVE_SIGSEGV_RECOVERY)
#	Line 1784 \| Line 2963 \| bool sigsegv_install_handler(sigsegv_fau
2963		if (success)
2964		sigsegv_fault_handler = handler;
2965		return success;
2966	<	#elif defined(HAVE_MACH_EXCEPTIONS)
2966	>	#elif defined(HAVE_MACH_EXCEPTIONS) \|\| defined(HAVE_WIN32_EXCEPTIONS)
2967		return sigsegv_do_install_handler(handler);
2968		#else
2969		// FAIL: no siginfo_t nor sigcontext subterfuge is available
#	Line 1810 \| Line 2989 \| void sigsegv_deinstall_handler(void)
2989		SIGSEGV_ALL_SIGNALS
2990		#undef FAULT_HANDLER
2991		#endif
2992	+	#ifdef HAVE_WIN32_EXCEPTIONS
2993	+	sigsegv_fault_handler = NULL;
2994	+	#endif
2995		}
2996
2997
#	Line 1831 \| Line 3013 \| void sigsegv_set_dump_state(sigsegv_stat
3013		#include <stdio.h>
3014		#include <stdlib.h>
3015		#include <fcntl.h>
3016	+	#ifdef HAVE_SYS_MMAN_H
3017		#include <sys/mman.h>
3018	+	#endif
3019		#include "vm_alloc.h"
3020
3021		const int REF_INDEX = 123;
3022		const int REF_VALUE = 45;
3023
3024	<	static int page_size;
3024	>	static sigsegv_uintptr_t page_size;
3025		static volatile char * page = 0;
3026		static volatile int handler_called = 0;
3027
3028	+	/* Barriers */
3029	+	#ifdef __GNUC__
3030	+	#define BARRIER() asm volatile ("" : : : "memory")
3031	+	#else
3032	+	#define BARRIER() /* nothing */
3033	+	#endif
3034	+
3035		#ifdef __GNUC__
3036		// Code range where we expect the fault to come from
3037		static void b_region, e_region;
3038		#endif
3039
3040	<	static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
3040	>	static sigsegv_return_t sigsegv_test_handler(sigsegv_info_t *sip)
3041		{
3042	+	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
3043	+	const sigsegv_address_t instruction_address = sigsegv_get_fault_instruction_address(sip);
3044		#if DEBUG
3045		printf("sigsegv_test_handler(%p, %p)\n", fault_address, instruction_address);
3046		printf("expected fault at %p\n", page + REF_INDEX);
#	Line 1861 \| Line 3054 \| static sigsegv_return_t sigsegv_test_han
3054		#ifdef __GNUC__
3055		// Make sure reported fault instruction address falls into
3056		// expected code range
3057	<	if (instruction_address != SIGSEGV_INVALID_PC
3057	>	if (instruction_address != SIGSEGV_INVALID_ADDRESS
3058		&& ((instruction_address < (sigsegv_address_t)b_region) \|\|
3059		(instruction_address >= (sigsegv_address_t)e_region)))
3060		exit(11);
3061		#endif
3062	<	if (vm_protect((char *)((unsigned long)fault_address & -page_size), page_size, VM_PAGE_READ \| VM_PAGE_WRITE) != 0)
3062	>	if (vm_protect((char *)((sigsegv_uintptr_t)fault_address & -page_size), page_size, VM_PAGE_READ \| VM_PAGE_WRITE) != 0)
3063		exit(12);
3064		return SIGSEGV_RETURN_SUCCESS;
3065		}
3066
3067		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
3068	<	static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
3068	>	static sigsegv_return_t sigsegv_insn_handler(sigsegv_info_t *sip)
3069		{
3070	+	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
3071	+	const sigsegv_address_t instruction_address = sigsegv_get_fault_instruction_address(sip);
3072		#if DEBUG
3073		printf("sigsegv_insn_handler(%p, %p)\n", fault_address, instruction_address);
3074		#endif
3075	<	if (((unsigned long)fault_address - (unsigned long)page) < page_size) {
3075	>	if (((sigsegv_uintptr_t)fault_address - (sigsegv_uintptr_t)page) < page_size) {
3076		#ifdef __GNUC__
3077		// Make sure reported fault instruction address falls into
3078		// expected code range
3079	<	if (instruction_address != SIGSEGV_INVALID_PC
3079	>	if (instruction_address != SIGSEGV_INVALID_ADDRESS
3080		&& ((instruction_address < (sigsegv_address_t)b_region) \|\|
3081		(instruction_address >= (sigsegv_address_t)e_region)))
3082		return SIGSEGV_RETURN_FAILURE;
#	Line 1895 \| Line 3090 \| static sigsegv_return_t sigsegv_insn_han
3090		// More sophisticated tests for instruction skipper
3091		static bool arch_insn_skipper_tests()
3092		{
3093	<	#if (defined(i386) \|\| defined(__i386__)) \|\| defined(__x86_64__)
3093	>	#if (defined(i386) \|\| defined(__i386__)) \|\| (defined(__x86_64__) \|\| defined(_M_X64))
3094		static const unsigned char code[] = {
3095		0x8a, 0x00, // mov (%eax),%al
3096		0x8a, 0x2c, 0x18, // mov (%eax,%ebx,1),%ch
#	Line 1909 \| Line 3104 \| static bool arch_insn_skipper_tests()
3104		0x8b, 0x0c, 0x18, // mov (%eax,%ebx,1),%ecx
3105		0x89, 0x00, // mov %eax,(%eax)
3106		0x89, 0x0c, 0x18, // mov %ecx,(%eax,%ebx,1)
3107	<	#if defined(__x86_64__)
3107	>	#if defined(__x86_64__) \|\| defined(_M_X64)
3108		0x44, 0x8a, 0x00, // mov (%rax),%r8b
3109		0x44, 0x8a, 0x20, // mov (%rax),%r12b
3110		0x42, 0x8a, 0x3c, 0x10, // mov (%rax,%r10,1),%dil
#	Line 1932 \| Line 3127 \| static bool arch_insn_skipper_tests()
3127		0x4c, 0x89, 0x18, // mov %r11,(%rax)
3128		0x4a, 0x89, 0x0c, 0x10, // mov %rcx,(%rax,%r10,1)
3129		0x4e, 0x89, 0x1c, 0x10, // mov %r11,(%rax,%r10,1)
3130	+	0x63, 0x47, 0x04, // movslq 4(%rdi),%eax
3131	+	0x48, 0x63, 0x47, 0x04, // movslq 4(%rdi),%rax
3132		#endif
3133		0 // end
3134		};
3135		const int N_REGS = 20;
3136	<	unsigned long regs[N_REGS];
3136	>	SIGSEGV_REGISTER_TYPE regs[N_REGS];
3137		for (int i = 0; i < N_REGS; i++)
3138		regs[i] = i;
3139	<	const unsigned long start_code = (unsigned long)&code;
3139	>	const sigsegv_uintptr_t start_code = (sigsegv_uintptr_t)&code;
3140		regs[X86_REG_EIP] = start_code;
3141		while ((regs[X86_REG_EIP] - start_code) < (sizeof(code) - 1)
3142		&& ix86_skip_instruction(regs))
#	Line 1955 \| Line 3152 \| int main(void)
3152		if (vm_init() < 0)
3153		return 1;
3154
3155	<	page_size = getpagesize();
3155	>	page_size = vm_get_page_size();
3156		if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED)
3157		return 2;
3158
#	Line 1965 \| Line 3162 \| int main(void)
3162
3163		if (!sigsegv_install_handler(sigsegv_test_handler))
3164		return 4;
3165	<
3165	>
3166		#ifdef __GNUC__
3167		b_region = &&L_b_region1;
3168		e_region = &&L_e_region1;
3169		#endif
3170	<	L_b_region1:
3171	<	page[REF_INDEX] = REF_VALUE;
3172	<	if (page[REF_INDEX] != REF_VALUE)
3173	<	exit(20);
3174	<	page[REF_INDEX] = REF_VALUE;
3175	<	L_e_region1:
3170	>	/* This is a really awful hack but otherwise gcc is smart enough
3171	>	* (or bug'ous enough?) to optimize the labels and place them
3172	>	* e.g. at the "main" entry point, which is wrong.
3173	>	*/
3174	>	volatile int label_hack = 1;
3175	>	switch (label_hack) {
3176	>	case 1:
3177	>	L_b_region1:
3178	>	page[REF_INDEX] = REF_VALUE;
3179	>	if (page[REF_INDEX] != REF_VALUE)
3180	>	exit(20);
3181	>	page[REF_INDEX] = REF_VALUE;
3182	>	BARRIER();
3183	>	// fall-through
3184	>	case 2:
3185	>	L_e_region1:
3186	>	BARRIER();
3187	>	break;
3188	>	}
3189
3190		if (handler_called != 1)
3191		return 5;
#	Line 2006 \| Line 3216 \| int main(void)
3216		b_region = &&L_b_region2;
3217		e_region = &&L_e_region2;
3218		#endif
3219	<	L_b_region2:
3220	<	TEST_SKIP_INSTRUCTION(unsigned char);
3221	<	TEST_SKIP_INSTRUCTION(unsigned short);
3222	<	TEST_SKIP_INSTRUCTION(unsigned int);
3223	<	TEST_SKIP_INSTRUCTION(unsigned long);
3224	<	TEST_SKIP_INSTRUCTION(signed char);
3225	<	TEST_SKIP_INSTRUCTION(signed short);
3226	<	TEST_SKIP_INSTRUCTION(signed int);
3227	<	TEST_SKIP_INSTRUCTION(signed long);
3228	<	L_e_region2:
3229	<
3219	>	switch (label_hack) {
3220	>	case 1:
3221	>	L_b_region2:
3222	>	TEST_SKIP_INSTRUCTION(unsigned char);
3223	>	TEST_SKIP_INSTRUCTION(unsigned short);
3224	>	TEST_SKIP_INSTRUCTION(unsigned int);
3225	>	TEST_SKIP_INSTRUCTION(unsigned long);
3226	>	TEST_SKIP_INSTRUCTION(signed char);
3227	>	TEST_SKIP_INSTRUCTION(signed short);
3228	>	TEST_SKIP_INSTRUCTION(signed int);
3229	>	TEST_SKIP_INSTRUCTION(signed long);
3230	>	BARRIER();
3231	>	// fall-through
3232	>	case 2:
3233	>	L_e_region2:
3234	>	BARRIER();
3235	>	break;
3236	>	}
3237		if (!arch_insn_skipper_tests())
3238		return 20;
3239		#endif

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Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents): Revision 1.46 by gbeauche, 2004-01-22T00:00:55Z vs. Revision 1.79 by gbeauche, 2008-01-12T23:01:40Z

Diff Legend

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.46 by gbeauche, 2004-01-22T00:00:55Z vs.
Revision 1.79 by gbeauche, 2008-01-12T23:01:40Z