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

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.33 by gbeauche, 2003-10-21T23:10:19Z vs.
Revision 1.61 by gbeauche, 2006-02-27T13:38:52Z

#	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) 1997-2002 Christian Bauer
13	>	* Basilisk II (C) 1997-2005 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 36 \| Line 36
36		#endif
37
38		#include <list>
39	+	#include <stdio.h>
40		#include <signal.h>
41		#include "sigsegv.h"
42
#	Line 69 \| Line 70 \| static bool sigsegv_do_install_handler(i
70		enum transfer_size_t {
71		SIZE_UNKNOWN,
72		SIZE_BYTE,
73	<	SIZE_WORD,
74	<	SIZE_LONG
73	>	SIZE_WORD, // 2 bytes
74	>	SIZE_LONG, // 4 bytes
75	>	SIZE_QUAD, // 8 bytes
76		};
77
78		// Transfer type
#	Line 95 \| Line 97 \| struct instruction_t {
97		char ra, rd;
98		};
99
100	<	static void powerpc_decode_instruction(instruction_t instruction, unsigned int nip, unsigned int gpr)
100	>	static void powerpc_decode_instruction(instruction_t instruction, unsigned int nip, unsigned long gpr)
101		{
102		// Get opcode and divide into fields
103	<	unsigned int opcode = ((unsigned int )nip);
103	>	unsigned int opcode = ((unsigned int )(unsigned long)nip);
104		unsigned int primop = opcode >> 26;
105		unsigned int exop = (opcode >> 1) & 0x3ff;
106		unsigned int ra = (opcode >> 16) & 0x1f;
#	Line 172 \| Line 174 \| static void powerpc_decode_instruction(i
174		transfer_type = SIGSEGV_TRANSFER_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
175		case 45: // sthu
176		transfer_type = SIGSEGV_TRANSFER_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
177	+	case 58: // ld, ldu, lwa
178	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
179	+	transfer_size = SIZE_QUAD;
180	+	addr_mode = ((opcode & 3) == 1) ? MODE_U : MODE_NORM;
181	+	imm &= ~3;
182	+	break;
183	+	case 62: // std, stdu, stq
184	+	transfer_type = SIGSEGV_TRANSFER_STORE;
185	+	transfer_size = SIZE_QUAD;
186	+	addr_mode = ((opcode & 3) == 1) ? MODE_U : MODE_NORM;
187	+	imm &= ~3;
188	+	break;
189		}
190
191		// Calculate effective address
#	Line 212 \| Line 226 \| static void powerpc_decode_instruction(i
226
227		#if HAVE_SIGINFO_T
228		// Generic extended signal handler
229	<	#if defined(__NetBSD__) \|\| defined(__FreeBSD__)
229	>	#if defined(__FreeBSD__)
230		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGBUS)
231		#else
232		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGSEGV)
#	Line 221 \| Line 235 \| static void powerpc_decode_instruction(i
235		#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 siginfo_t sip, void scp
236		#define SIGSEGV_FAULT_HANDLER_ARGS sip, scp
237		#define SIGSEGV_FAULT_ADDRESS sip->si_addr
238	+	#if (defined(sgi) \|\| defined(__sgi))
239	+	#include <ucontext.h>
240	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
241	+	#define SIGSEGV_FAULT_INSTRUCTION (unsigned long)SIGSEGV_CONTEXT_REGS[CTX_EPC]
242	+	#if (defined(mips) \|\| defined(__mips))
243	+	#define SIGSEGV_REGISTER_FILE SIGSEGV_CONTEXT_REGS
244	+	#define SIGSEGV_SKIP_INSTRUCTION mips_skip_instruction
245	+	#endif
246	+	#endif
247		#if defined(__sun__)
248		#if (defined(sparc) \|\| defined(__sparc__))
249	+	#include <sys/stack.h>
250	+	#include <sys/regset.h>
251		#include <sys/ucontext.h>
252		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
253		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[REG_PC]
254	+	#define SIGSEGV_SPARC_GWINDOWS (((ucontext_t *)scp)->uc_mcontext.gwins)
255	+	#define SIGSEGV_SPARC_RWINDOW (struct rwindow )((char )SIGSEGV_CONTEXT_REGS[REG_SP] + STACK_BIAS)
256	+	#define SIGSEGV_REGISTER_FILE ((unsigned long *)SIGSEGV_CONTEXT_REGS), SIGSEGV_SPARC_GWINDOWS, SIGSEGV_SPARC_RWINDOW
257	+	#define SIGSEGV_SKIP_INSTRUCTION sparc_skip_instruction
258		#endif
259	+	#if defined(__i386__)
260	+	#include <sys/regset.h>
261	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
262	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[EIP]
263	+	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
264	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
265		#endif
266	<	#if defined(__FreeBSD__)
266	>	#endif
267	>	#if defined(__FreeBSD__) \|\| defined(__OpenBSD__)
268		#if (defined(i386) \|\| defined(__i386__))
269		#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext *)scp)->sc_eip)
270	<	#define SIGSEGV_REGISTER_FILE ((unsigned int )&(((struct sigcontext )scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
270	>	#define SIGSEGV_REGISTER_FILE ((unsigned long )&(((struct sigcontext )scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
271		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
272		#endif
273		#endif
274	+	#if defined(__NetBSD__)
275	+	#if (defined(i386) \|\| defined(__i386__))
276	+	#include <sys/ucontext.h>
277	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
278	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_EIP]
279	+	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
280	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
281	+	#endif
282	+	#if (defined(powerpc) \|\| defined(__powerpc__))
283	+	#include <sys/ucontext.h>
284	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
285	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_PC]
286	+	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIGSEGV_CONTEXT_REGS[_REG_PC], (unsigned long )&SIGSEGV_CONTEXT_REGS[_REG_R0]
287	+	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
288	+	#endif
289	+	#endif
290		#if defined(__linux__)
291		#if (defined(i386) \|\| defined(__i386__))
292		#include <sys/ucontext.h>
293		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
294		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[14] /* should use REG_EIP instead */
295	<	#define SIGSEGV_REGISTER_FILE (unsigned int *)SIGSEGV_CONTEXT_REGS
295	>	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
296		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
297		#endif
298		#if (defined(x86_64) \|\| defined(__x86_64__))
#	Line 248 \| Line 300 \| static void powerpc_decode_instruction(i
300		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.gregs)
301		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[16] /* should use REG_RIP instead */
302		#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
303	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
304		#endif
305		#if (defined(ia64) \|\| defined(__ia64__))
306		#define SIGSEGV_FAULT_INSTRUCTION (((struct sigcontext )scp)->sc_ip & ~0x3ULL) / slot number is in bits 0 and 1 */
#	Line 256 \| Line 309 \| static void powerpc_decode_instruction(i
309		#include <sys/ucontext.h>
310		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.regs)
311		#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS->nip)
312	<	#define SIGSEGV_REGISTER_FILE (unsigned int )&SIGSEGV_CONTEXT_REGS->nip, (unsigned int )(SIGSEGV_CONTEXT_REGS->gpr)
312	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIGSEGV_CONTEXT_REGS->nip, (unsigned long )(SIGSEGV_CONTEXT_REGS->gpr)
313		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
314		#endif
315	+	#if (defined(hppa) \|\| defined(__hppa__))
316	+	#undef SIGSEGV_FAULT_ADDRESS
317	+	#define SIGSEGV_FAULT_ADDRESS sip->si_ptr
318	+	#endif
319	+	#if (defined(arm) \|\| defined(__arm__))
320	+	#include <asm/ucontext.h> /* use kernel structure, glibc may not be in sync */
321	+	#define SIGSEGV_CONTEXT_REGS (((struct ucontext *)scp)->uc_mcontext)
322	+	#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS.arm_pc)
323	+	#define SIGSEGV_REGISTER_FILE (&SIGSEGV_CONTEXT_REGS.arm_r0)
324	+	#define SIGSEGV_SKIP_INSTRUCTION arm_skip_instruction
325	+	#endif
326		#endif
327		#endif
328
#	Line 273 \| Line 337 \| static void powerpc_decode_instruction(i
337		#define SIGSEGV_FAULT_HANDLER_ARGS &scs
338		#define SIGSEGV_FAULT_ADDRESS scp->cr2
339		#define SIGSEGV_FAULT_INSTRUCTION scp->eip
340	<	#define SIGSEGV_REGISTER_FILE (unsigned int *)scp
340	>	#define SIGSEGV_REGISTER_FILE (unsigned long *)scp
341		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
342		#endif
343		#if (defined(sparc) \|\| defined(__sparc__))
#	Line 288 \| Line 352 \| static void powerpc_decode_instruction(i
352		#define SIGSEGV_FAULT_HANDLER_ARGS sig, scp
353		#define SIGSEGV_FAULT_ADDRESS scp->regs->dar
354		#define SIGSEGV_FAULT_INSTRUCTION scp->regs->nip
355	<	#define SIGSEGV_REGISTER_FILE (unsigned int )&scp->regs->nip, (unsigned int )(scp->regs->gpr)
355	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&scp->regs->nip, (unsigned long )(scp->regs->gpr)
356		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
357		#endif
358		#if (defined(alpha) \|\| defined(__alpha__))
#	Line 298 \| Line 362 \| static void powerpc_decode_instruction(i
362		#define SIGSEGV_FAULT_ADDRESS get_fault_address(scp)
363		#define SIGSEGV_FAULT_INSTRUCTION scp->sc_pc
364		#endif
365	+	#if (defined(arm) \|\| defined(__arm__))
366	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST int sig, int r1, int r2, int r3, struct sigcontext sc
367	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 struct sigcontext *scp
368	+	#define SIGSEGV_FAULT_HANDLER_ARGS &sc
369	+	#define SIGSEGV_FAULT_ADDRESS scp->fault_address
370	+	#define SIGSEGV_FAULT_INSTRUCTION scp->arm_pc
371	+	#define SIGSEGV_REGISTER_FILE &scp->arm_r0
372	+	#define SIGSEGV_SKIP_INSTRUCTION arm_skip_instruction
373	+	#endif
374		#endif
375
376		// Irix 5 or 6 on MIPS
377	<	#if (defined(sgi) \|\| defined(__sgi)) && (defined(SYSTYPE_SVR4) \|\| defined(__SYSTYPE_SVR4))
377	>	#if (defined(sgi) \|\| defined(__sgi)) && (defined(SYSTYPE_SVR4) \|\| defined(_SYSTYPE_SVR4))
378		#include <ucontext.h>
379		#define SIGSEGV_FAULT_HANDLER_ARGLIST int sig, int code, struct sigcontext *scp
380		#define SIGSEGV_FAULT_HANDLER_ARGS sig, code, scp
381	<	#define SIGSEGV_FAULT_ADDRESS scp->sc_badvaddr
381	>	#define SIGSEGV_FAULT_ADDRESS (unsigned long)scp->sc_badvaddr
382	>	#define SIGSEGV_FAULT_INSTRUCTION (unsigned long)scp->sc_pc
383		#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGSEGV)
384		#endif
385
#	Line 378 \| Line 452 \| static sigsegv_address_t get_fault_addre
452		#endif
453		#endif
454		#if defined(__FreeBSD__)
381	–	#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGBUS)
455		#if (defined(i386) \|\| defined(__i386__))
456	+	#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGBUS)
457		#define SIGSEGV_FAULT_HANDLER_ARGLIST int sig, int code, struct sigcontext scp, char addr
458		#define SIGSEGV_FAULT_HANDLER_ARGS sig, code, scp, addr
459		#define SIGSEGV_FAULT_ADDRESS addr
460		#define SIGSEGV_FAULT_INSTRUCTION scp->sc_eip
461	<	#define SIGSEGV_REGISTER_FILE ((unsigned int *)&scp->sc_edi)
461	>	#define SIGSEGV_REGISTER_FILE ((unsigned long *)&scp->sc_edi)
462		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
463		#endif
464	+	#if (defined(alpha) \|\| defined(__alpha__))
465	+	#define SIGSEGV_ALL_SIGNALS FAULT_HANDLER(SIGSEGV)
466	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST int sig, char addr, struct sigcontext scp
467	+	#define SIGSEGV_FAULT_HANDLER_ARGS sig, addr, scp
468	+	#define SIGSEGV_FAULT_ADDRESS addr
469	+	#define SIGSEGV_FAULT_INSTRUCTION scp->sc_pc
470	+	#endif
471		#endif
472
473		// Extract fault address out of a sigcontext
#	Line 435 \| Line 516 \| static sigsegv_address_t get_fault_addre
516		#endif
517		#endif
518
519	+	#if HAVE_WIN32_EXCEPTIONS
520	+	#define WIN32_LEAN_AND_MEAN /* avoid including junk */
521	+	#include <windows.h>
522	+	#include <winerror.h>
523	+
524	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST EXCEPTION_POINTERS *ExceptionInfo
525	+	#define SIGSEGV_FAULT_HANDLER_ARGS ExceptionInfo
526	+	#define SIGSEGV_FAULT_ADDRESS ExceptionInfo->ExceptionRecord->ExceptionInformation[1]
527	+	#define SIGSEGV_CONTEXT_REGS ExceptionInfo->ContextRecord
528	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->Eip
529	+	#define SIGSEGV_REGISTER_FILE ((unsigned long *)&SIGSEGV_CONTEXT_REGS->Edi)
530	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
531	+	#endif
532	+
533		#if HAVE_MACH_EXCEPTIONS
534
535		// This can easily be extended to other Mach systems, but really who
#	Line 495 \| Line 590 \| if (ret != KERN_SUCCESS) { \
590		exit (1); \
591		}
592
593	+	#ifdef __ppc__
594	+	#define SIGSEGV_THREAD_STATE_TYPE ppc_thread_state_t
595	+	#define SIGSEGV_THREAD_STATE_FLAVOR PPC_THREAD_STATE
596	+	#define SIGSEGV_THREAD_STATE_COUNT PPC_THREAD_STATE_COUNT
597	+	#define SIGSEGV_FAULT_INSTRUCTION state->srr0
598	+	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
599	+	#define SIGSEGV_REGISTER_FILE (unsigned long )&state->srr0, (unsigned long )&state->r0
600	+	#endif
601	+	#ifdef __i386__
602	+	#ifdef i386_SAVED_STATE
603	+	#define SIGSEGV_THREAD_STATE_TYPE struct i386_saved_state
604	+	#define SIGSEGV_THREAD_STATE_FLAVOR i386_SAVED_STATE
605	+	#define SIGSEGV_THREAD_STATE_COUNT i386_SAVED_STATE_COUNT
606	+	#define SIGSEGV_REGISTER_FILE ((unsigned long )&state->edi) / EDI is the first GPR we consider */
607	+	#else
608	+	#define SIGSEGV_THREAD_STATE_TYPE struct i386_thread_state
609	+	#define SIGSEGV_THREAD_STATE_FLAVOR i386_THREAD_STATE
610	+	#define SIGSEGV_THREAD_STATE_COUNT i386_THREAD_STATE_COUNT
611	+	#define SIGSEGV_REGISTER_FILE ((unsigned long )&state->eax) / EAX is the first GPR we consider */
612	+	#endif
613	+	#define SIGSEGV_FAULT_INSTRUCTION state->eip
614	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
615	+	#endif
616		#define SIGSEGV_FAULT_ADDRESS code[1]
499	–	#define SIGSEGV_FAULT_INSTRUCTION get_fault_instruction(thread, state)
617		#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP) ((code[0] == KERN_PROTECTION_FAILURE) ? sigsegv_fault_handler(ADDR, IP) : SIGSEGV_RETURN_FAILURE)
618	<	#define SIGSEGV_FAULT_HANDLER_ARGLIST mach_port_t thread, exception_data_t code, ppc_thread_state_t *state
618	>	#define SIGSEGV_FAULT_HANDLER_ARGLIST mach_port_t thread, exception_data_t code, SIGSEGV_THREAD_STATE_TYPE *state
619		#define SIGSEGV_FAULT_HANDLER_ARGS thread, code, &state
503	–	#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
504	–	#define SIGSEGV_REGISTER_FILE &state->srr0, &state->r0
505	–
506	–	// Given a suspended thread, stuff the current instruction and
507	–	// registers into state.
508	–	//
509	–	// It would have been nice to have this be ppc/x86 independant which
510	–	// could have been done easily with a thread_state_t instead of
511	–	// ppc_thread_state_t, but because of the way this is called it is
512	–	// easier to do it this way.
513	–	#if (defined(ppc) \|\| defined(__ppc__))
514	–	static inline sigsegv_address_t get_fault_instruction(mach_port_t thread, ppc_thread_state_t *state)
515	–	{
516	–	kern_return_t krc;
517	–	mach_msg_type_number_t count;
518	–
519	–	count = MACHINE_THREAD_STATE_COUNT;
520	–	krc = thread_get_state(thread, MACHINE_THREAD_STATE, (thread_state_t)state, &count);
521	–	MACH_CHECK_ERROR (thread_get_state, krc);
522	–
523	–	return (sigsegv_address_t)state->srr0;
524	–	}
525	–	#endif
620
621		// Since there can only be one exception thread running at any time
622		// this is not a problem.
#	Line 577 \| Line 671 \| *handleExceptions(void priv)**
671
672		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
673		// Decode and skip X86 instruction
674	<	#if (defined(i386) \|\| defined(__i386__))
674	>	#if (defined(i386) \|\| defined(__i386__)) \|\| defined(__x86_64__)
675		#if defined(__linux__)
676		enum {
677	+	#if (defined(i386) \|\| defined(__i386__))
678		X86_REG_EIP = 14,
679		X86_REG_EAX = 11,
680		X86_REG_ECX = 10,
#	Line 589 \| Line 684 \| enum {
684		X86_REG_EBP = 6,
685		X86_REG_ESI = 5,
686		X86_REG_EDI = 4
687	+	#endif
688	+	#if defined(__x86_64__)
689	+	X86_REG_R8 = 0,
690	+	X86_REG_R9 = 1,
691	+	X86_REG_R10 = 2,
692	+	X86_REG_R11 = 3,
693	+	X86_REG_R12 = 4,
694	+	X86_REG_R13 = 5,
695	+	X86_REG_R14 = 6,
696	+	X86_REG_R15 = 7,
697	+	X86_REG_EDI = 8,
698	+	X86_REG_ESI = 9,
699	+	X86_REG_EBP = 10,
700	+	X86_REG_EBX = 11,
701	+	X86_REG_EDX = 12,
702	+	X86_REG_EAX = 13,
703	+	X86_REG_ECX = 14,
704	+	X86_REG_ESP = 15,
705	+	X86_REG_EIP = 16
706	+	#endif
707	+	};
708	+	#endif
709	+	#if defined(__NetBSD__)
710	+	enum {
711	+	#if (defined(i386) \|\| defined(__i386__))
712	+	X86_REG_EIP = _REG_EIP,
713	+	X86_REG_EAX = _REG_EAX,
714	+	X86_REG_ECX = _REG_ECX,
715	+	X86_REG_EDX = _REG_EDX,
716	+	X86_REG_EBX = _REG_EBX,
717	+	X86_REG_ESP = _REG_ESP,
718	+	X86_REG_EBP = _REG_EBP,
719	+	X86_REG_ESI = _REG_ESI,
720	+	X86_REG_EDI = _REG_EDI
721	+	#endif
722		};
723		#endif
724	<	#if defined(__NetBSD__) \|\| defined(__FreeBSD__)
724	>	#if defined(__FreeBSD__)
725		enum {
726	+	#if (defined(i386) \|\| defined(__i386__))
727		X86_REG_EIP = 10,
728		X86_REG_EAX = 7,
729		X86_REG_ECX = 6,
#	Line 602 \| Line 733 \| enum {
733		X86_REG_EBP = 2,
734		X86_REG_ESI = 1,
735		X86_REG_EDI = 0
736	+	#endif
737	+	};
738	+	#endif
739	+	#if defined(__OpenBSD__)
740	+	enum {
741	+	#if defined(__i386__)
742	+	// EDI is the first register we consider
743	+	#define OREG(REG) offsetof(struct sigcontext, sc_##REG)
744	+	#define DREG(REG) ((OREG(REG) - OREG(edi)) / 4)
745	+	X86_REG_EIP = DREG(eip), // 7
746	+	X86_REG_EAX = DREG(eax), // 6
747	+	X86_REG_ECX = DREG(ecx), // 5
748	+	X86_REG_EDX = DREG(edx), // 4
749	+	X86_REG_EBX = DREG(ebx), // 3
750	+	X86_REG_ESP = DREG(esp), // 10
751	+	X86_REG_EBP = DREG(ebp), // 2
752	+	X86_REG_ESI = DREG(esi), // 1
753	+	X86_REG_EDI = DREG(edi) // 0
754	+	#undef DREG
755	+	#undef OREG
756	+	#endif
757	+	};
758	+	#endif
759	+	#if defined(__sun__)
760	+	// Same as for Linux, need to check for x86-64
761	+	enum {
762	+	#if defined(__i386__)
763	+	X86_REG_EIP = EIP,
764	+	X86_REG_EAX = EAX,
765	+	X86_REG_ECX = ECX,
766	+	X86_REG_EDX = EDX,
767	+	X86_REG_EBX = EBX,
768	+	X86_REG_ESP = ESP,
769	+	X86_REG_EBP = EBP,
770	+	X86_REG_ESI = ESI,
771	+	X86_REG_EDI = EDI
772	+	#endif
773	+	};
774	+	#endif
775	+	#if defined(__APPLE__) && defined(__MACH__)
776	+	enum {
777	+	#ifdef i386_SAVED_STATE
778	+	// same as FreeBSD (in Open Darwin 8.0.1)
779	+	X86_REG_EIP = 10,
780	+	X86_REG_EAX = 7,
781	+	X86_REG_ECX = 6,
782	+	X86_REG_EDX = 5,
783	+	X86_REG_EBX = 4,
784	+	X86_REG_ESP = 13,
785	+	X86_REG_EBP = 2,
786	+	X86_REG_ESI = 1,
787	+	X86_REG_EDI = 0
788	+	#else
789	+	// new layout (MacOS X 10.4.4 for x86)
790	+	X86_REG_EIP = 10,
791	+	X86_REG_EAX = 0,
792	+	X86_REG_ECX = 2,
793	+	X86_REG_EDX = 4,
794	+	X86_REG_EBX = 1,
795	+	X86_REG_ESP = 7,
796	+	X86_REG_EBP = 6,
797	+	X86_REG_ESI = 5,
798	+	X86_REG_EDI = 4
799	+	#endif
800	+	};
801	+	#endif
802	+	#if defined(_WIN32)
803	+	enum {
804	+	#if (defined(i386) \|\| defined(__i386__))
805	+	X86_REG_EIP = 7,
806	+	X86_REG_EAX = 5,
807	+	X86_REG_ECX = 4,
808	+	X86_REG_EDX = 3,
809	+	X86_REG_EBX = 2,
810	+	X86_REG_ESP = 10,
811	+	X86_REG_EBP = 6,
812	+	X86_REG_ESI = 1,
813	+	X86_REG_EDI = 0
814	+	#endif
815		};
816		#endif
817		// FIXME: this is partly redundant with the instruction decoding phase
#	Line 638 \| Line 848 \| static inline int ix86_step_over_modrm(u
848		return offset;
849		}
850
851	<	static bool ix86_skip_instruction(unsigned int * regs)
851	>	static bool ix86_skip_instruction(unsigned long * regs)
852		{
853		unsigned char * eip = (unsigned char *)regs[X86_REG_EIP];
854
855		if (eip == 0)
856		return false;
857	+	#ifdef _WIN32
858	+	if (IsBadCodePtr((FARPROC)eip))
859	+	return false;
860	+	#endif
861
862		transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
863		transfer_size_t transfer_size = SIZE_LONG;
864
865		int reg = -1;
866		int len = 0;
867	<
867	>
868	>	#if DEBUG
869	>	printf("IP: %p [%02x %02x %02x %02x...]\n",
870	>	eip, eip[0], eip[1], eip[2], eip[3]);
871	>	#endif
872	>
873		// Operand size prefix
874		if (*eip == 0x66) {
875		eip++;
#	Line 658 \| Line 877 \| static bool ix86_skip_instruction(unsign
877		transfer_size = SIZE_WORD;
878		}
879
880	+	// REX prefix
881	+	#if defined(__x86_64__)
882	+	struct rex_t {
883	+	unsigned char W;
884	+	unsigned char R;
885	+	unsigned char X;
886	+	unsigned char B;
887	+	};
888	+	rex_t rex = { 0, 0, 0, 0 };
889	+	bool has_rex = false;
890	+	if ((*eip & 0xf0) == 0x40) {
891	+	has_rex = true;
892	+	const unsigned char b = *eip;
893	+	rex.W = b & (1 << 3);
894	+	rex.R = b & (1 << 2);
895	+	rex.X = b & (1 << 1);
896	+	rex.B = b & (1 << 0);
897	+	#if DEBUG
898	+	printf("REX: %c,%c,%c,%c\n",
899	+	rex.W ? 'W' : '_',
900	+	rex.R ? 'R' : '_',
901	+	rex.X ? 'X' : '_',
902	+	rex.B ? 'B' : '_');
903	+	#endif
904	+	eip++;
905	+	len++;
906	+	if (rex.W)
907	+	transfer_size = SIZE_QUAD;
908	+	}
909	+	#else
910	+	const bool has_rex = false;
911	+	#endif
912	+
913		// Decode instruction
914	+	int target_size = SIZE_UNKNOWN;
915		switch (eip[0]) {
916		case 0x0f:
917	+	target_size = transfer_size;
918		switch (eip[1]) {
919	+	case 0xbe: // MOVSX r32, r/m8
920		case 0xb6: // MOVZX r32, r/m8
921	+	transfer_size = SIZE_BYTE;
922	+	goto do_mov_extend;
923	+	case 0xbf: // MOVSX r32, r/m16
924		case 0xb7: // MOVZX r32, r/m16
925	<	switch (eip[2] & 0xc0) {
926	<	case 0x80:
927	<	reg = (eip[2] >> 3) & 7;
928	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
929	<	break;
930	<	case 0x40:
931	<	reg = (eip[2] >> 3) & 7;
932	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
933	<	break;
934	<	case 0x00:
935	<	reg = (eip[2] >> 3) & 7;
936	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
937	<	break;
938	<	}
939	<	len += 3 + ix86_step_over_modrm(eip + 2);
940	<	break;
925	>	transfer_size = SIZE_WORD;
926	>	goto do_mov_extend;
927	>	do_mov_extend:
928	>	switch (eip[2] & 0xc0) {
929	>	case 0x80:
930	>	reg = (eip[2] >> 3) & 7;
931	>	transfer_type = SIGSEGV_TRANSFER_LOAD;
932	>	break;
933	>	case 0x40:
934	>	reg = (eip[2] >> 3) & 7;
935	>	transfer_type = SIGSEGV_TRANSFER_LOAD;
936	>	break;
937	>	case 0x00:
938	>	reg = (eip[2] >> 3) & 7;
939	>	transfer_type = SIGSEGV_TRANSFER_LOAD;
940	>	break;
941	>	}
942	>	len += 3 + ix86_step_over_modrm(eip + 2);
943	>	break;
944		}
945		break;
946		case 0x8a: // MOV r8, r/m8
#	Line 721 \| Line 982 \| static bool ix86_skip_instruction(unsign
982		len += 2 + ix86_step_over_modrm(eip + 1);
983		break;
984		}
985	+	if (target_size == SIZE_UNKNOWN)
986	+	target_size = transfer_size;
987
988		if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
989		// Unknown machine code, let it crash. Then patch the decoder
990		return false;
991		}
992
993	+	#if defined(__x86_64__)
994	+	if (rex.R)
995	+	reg += 8;
996	+	#endif
997	+
998		if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
999	<	static const int x86_reg_map[8] = {
999	>	static const int x86_reg_map[] = {
1000		X86_REG_EAX, X86_REG_ECX, X86_REG_EDX, X86_REG_EBX,
1001	<	X86_REG_ESP, X86_REG_EBP, X86_REG_ESI, X86_REG_EDI
1001	>	X86_REG_ESP, X86_REG_EBP, X86_REG_ESI, X86_REG_EDI,
1002	>	#if defined(__x86_64__)
1003	>	X86_REG_R8, X86_REG_R9, X86_REG_R10, X86_REG_R11,
1004	>	X86_REG_R12, X86_REG_R13, X86_REG_R14, X86_REG_R15,
1005	>	#endif
1006		};
1007
1008	<	if (reg < 0 \|\| reg >= 8)
1008	>	if (reg < 0 \|\| reg >= (sizeof(x86_reg_map)/sizeof(x86_reg_map[0]) - 1))
1009		return false;
1010
1011	+	// Set 0 to the relevant register part
1012	+	// NOTE: this is only valid for MOV alike instructions
1013		int rloc = x86_reg_map[reg];
1014	<	switch (transfer_size) {
1014	>	switch (target_size) {
1015		case SIZE_BYTE:
1016	<	regs[rloc] = (regs[rloc] & ~0xff);
1016	>	if (has_rex \|\| reg < 4)
1017	>	regs[rloc] = (regs[rloc] & ~0x00ffL);
1018	>	else {
1019	>	rloc = x86_reg_map[reg - 4];
1020	>	regs[rloc] = (regs[rloc] & ~0xff00L);
1021	>	}
1022		break;
1023		case SIZE_WORD:
1024	<	regs[rloc] = (regs[rloc] & ~0xffff);
1024	>	regs[rloc] = (regs[rloc] & ~0xffffL);
1025		break;
1026		case SIZE_LONG:
1027	+	case SIZE_QUAD: // zero-extension
1028		regs[rloc] = 0;
1029		break;
1030		}
#	Line 752 \| Line 1032 \| static bool ix86_skip_instruction(unsign
1032
1033		#if DEBUG
1034		printf("%08x: %s %s access", regs[X86_REG_EIP],
1035	<	transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_WORD ? "word" : "long",
1035	>	transfer_size == SIZE_BYTE ? "byte" :
1036	>	transfer_size == SIZE_WORD ? "word" :
1037	>	transfer_size == SIZE_LONG ? "long" :
1038	>	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1039		transfer_type == SIGSEGV_TRANSFER_LOAD ? "read" : "write");
1040
1041		if (reg != -1) {
1042	<	static const char * x86_reg_str_map[8] = {
1043	<	"eax", "ecx", "edx", "ebx",
1044	<	"esp", "ebp", "esi", "edi"
1042	>	static const char * x86_byte_reg_str_map[] = {
1043	>	"al", "cl", "dl", "bl",
1044	>	"spl", "bpl", "sil", "dil",
1045	>	"r8b", "r9b", "r10b", "r11b",
1046	>	"r12b", "r13b", "r14b", "r15b",
1047	>	"ah", "ch", "dh", "bh",
1048	>	};
1049	>	static const char * x86_word_reg_str_map[] = {
1050	>	"ax", "cx", "dx", "bx",
1051	>	"sp", "bp", "si", "di",
1052	>	"r8w", "r9w", "r10w", "r11w",
1053	>	"r12w", "r13w", "r14w", "r15w",
1054	>	};
1055	>	static const char *x86_long_reg_str_map[] = {
1056	>	"eax", "ecx", "edx", "ebx",
1057	>	"esp", "ebp", "esi", "edi",
1058	>	"r8d", "r9d", "r10d", "r11d",
1059	>	"r12d", "r13d", "r14d", "r15d",
1060	>	};
1061	>	static const char *x86_quad_reg_str_map[] = {
1062	>	"rax", "rcx", "rdx", "rbx",
1063	>	"rsp", "rbp", "rsi", "rdi",
1064	>	"r8", "r9", "r10", "r11",
1065	>	"r12", "r13", "r14", "r15",
1066		};
1067	<	printf(" %s register %%%s", transfer_type == SIGSEGV_TRANSFER_LOAD ? "to" : "from", x86_reg_str_map[reg]);
1067	>	const char * reg_str = NULL;
1068	>	switch (target_size) {
1069	>	case SIZE_BYTE:
1070	>	reg_str = x86_byte_reg_str_map[(!has_rex && reg >= 4 ? 12 : 0) + reg];
1071	>	break;
1072	>	case SIZE_WORD: reg_str = x86_word_reg_str_map[reg]; break;
1073	>	case SIZE_LONG: reg_str = x86_long_reg_str_map[reg]; break;
1074	>	case SIZE_QUAD: reg_str = x86_quad_reg_str_map[reg]; break;
1075	>	}
1076	>	if (reg_str)
1077	>	printf(" %s register %%%s",
1078	>	transfer_type == SIGSEGV_TRANSFER_LOAD ? "to" : "from",
1079	>	reg_str);
1080		}
1081		printf(", %d bytes instruction\n", len);
1082		#endif
#	Line 772 \| Line 1088 \| static bool ix86_skip_instruction(unsign
1088
1089		// Decode and skip PPC instruction
1090		#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__))
1091	<	static bool powerpc_skip_instruction(unsigned int * nip_p, unsigned int * regs)
1091	>	static bool powerpc_skip_instruction(unsigned long * nip_p, unsigned long * regs)
1092		{
1093		instruction_t instr;
1094		powerpc_decode_instruction(&instr, *nip_p, regs);
#	Line 784 \| Line 1100 \| static bool powerpc_skip_instruction(uns
1100
1101		#if DEBUG
1102		printf("%08x: %s %s access", *nip_p,
1103	<	instr.transfer_size == SIZE_BYTE ? "byte" : instr.transfer_size == SIZE_WORD ? "word" : "long",
1103	>	instr.transfer_size == SIZE_BYTE ? "byte" :
1104	>	instr.transfer_size == SIZE_WORD ? "word" :
1105	>	instr.transfer_size == SIZE_LONG ? "long" : "quad",
1106		instr.transfer_type == SIGSEGV_TRANSFER_LOAD ? "read" : "write");
1107
1108		if (instr.addr_mode == MODE_U \|\| instr.addr_mode == MODE_UX)
#	Line 802 \| Line 1120 \| static bool powerpc_skip_instruction(uns
1120		return true;
1121		}
1122		#endif
1123	+
1124	+	// Decode and skip MIPS instruction
1125	+	#if (defined(mips) \|\| defined(__mips))
1126	+	enum {
1127	+	#if (defined(sgi) \|\| defined(__sgi))
1128	+	MIPS_REG_EPC = 35,
1129	+	#endif
1130	+	};
1131	+	static bool mips_skip_instruction(greg_t * regs)
1132	+	{
1133	+	unsigned int * epc = (unsigned int *)(unsigned long)regs[MIPS_REG_EPC];
1134	+
1135	+	if (epc == 0)
1136	+	return false;
1137	+
1138	+	#if DEBUG
1139	+	printf("IP: %p [%08x]\n", epc, epc[0]);
1140		#endif
1141
1142	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1143	+	transfer_size_t transfer_size = SIZE_LONG;
1144	+	int direction = 0;
1145	+
1146	+	const unsigned int opcode = epc[0];
1147	+	switch (opcode >> 26) {
1148	+	case 32: // Load Byte
1149	+	case 36: // Load Byte Unsigned
1150	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1151	+	transfer_size = SIZE_BYTE;
1152	+	break;
1153	+	case 33: // Load Halfword
1154	+	case 37: // Load Halfword Unsigned
1155	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1156	+	transfer_size = SIZE_WORD;
1157	+	break;
1158	+	case 35: // Load Word
1159	+	case 39: // Load Word Unsigned
1160	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1161	+	transfer_size = SIZE_LONG;
1162	+	break;
1163	+	case 34: // Load Word Left
1164	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1165	+	transfer_size = SIZE_LONG;
1166	+	direction = -1;
1167	+	break;
1168	+	case 38: // Load Word Right
1169	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1170	+	transfer_size = SIZE_LONG;
1171	+	direction = 1;
1172	+	break;
1173	+	case 55: // Load Doubleword
1174	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1175	+	transfer_size = SIZE_QUAD;
1176	+	break;
1177	+	case 26: // Load Doubleword Left
1178	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1179	+	transfer_size = SIZE_QUAD;
1180	+	direction = -1;
1181	+	break;
1182	+	case 27: // Load Doubleword Right
1183	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1184	+	transfer_size = SIZE_QUAD;
1185	+	direction = 1;
1186	+	break;
1187	+	case 40: // Store Byte
1188	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1189	+	transfer_size = SIZE_BYTE;
1190	+	break;
1191	+	case 41: // Store Halfword
1192	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1193	+	transfer_size = SIZE_WORD;
1194	+	break;
1195	+	case 43: // Store Word
1196	+	case 42: // Store Word Left
1197	+	case 46: // Store Word Right
1198	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1199	+	transfer_size = SIZE_LONG;
1200	+	break;
1201	+	case 63: // Store Doubleword
1202	+	case 44: // Store Doubleword Left
1203	+	case 45: // Store Doubleword Right
1204	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1205	+	transfer_size = SIZE_QUAD;
1206	+	break;
1207	+	/* Misc instructions unlikely to be used within CPU emulators */
1208	+	case 48: // Load Linked Word
1209	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1210	+	transfer_size = SIZE_LONG;
1211	+	break;
1212	+	case 52: // Load Linked Doubleword
1213	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1214	+	transfer_size = SIZE_QUAD;
1215	+	break;
1216	+	case 56: // Store Conditional Word
1217	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1218	+	transfer_size = SIZE_LONG;
1219	+	break;
1220	+	case 60: // Store Conditional Doubleword
1221	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1222	+	transfer_size = SIZE_QUAD;
1223	+	break;
1224	+	}
1225	+
1226	+	if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1227	+	// Unknown machine code, let it crash. Then patch the decoder
1228	+	return false;
1229	+	}
1230	+
1231	+	// Zero target register in case of a load operation
1232	+	const int reg = (opcode >> 16) & 0x1f;
1233	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD) {
1234	+	if (direction == 0)
1235	+	regs[reg] = 0;
1236	+	else {
1237	+	// FIXME: untested code
1238	+	unsigned long ea = regs[(opcode >> 21) & 0x1f];
1239	+	ea += (signed long)(signed int)(signed short)(opcode & 0xffff);
1240	+	const int offset = ea & (transfer_size == SIZE_LONG ? 3 : 7);
1241	+	unsigned long value;
1242	+	if (direction > 0) {
1243	+	const unsigned long rmask = ~((1L << ((offset + 1) * 8)) - 1);
1244	+	value = regs[reg] & rmask;
1245	+	}
1246	+	else {
1247	+	const unsigned long lmask = (1L << (offset * 8)) - 1;
1248	+	value = regs[reg] & lmask;
1249	+	}
1250	+	// restore most significant bits
1251	+	if (transfer_size == SIZE_LONG)
1252	+	value = (signed long)(signed int)value;
1253	+	regs[reg] = value;
1254	+	}
1255	+	}
1256	+
1257	+	#if DEBUG
1258	+	#if (defined(_ABIN32) \|\| defined(_ABI64))
1259	+	static const char * mips_gpr_names[32] = {
1260	+	"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
1261	+	"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7",
1262	+	"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
1263	+	"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
1264	+	};
1265	+	#else
1266	+	static const char * mips_gpr_names[32] = {
1267	+	"zero", "at", "v0", "v1", "a0", "a1", "a2", "a3",
1268	+	"a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3",
1269	+	"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7",
1270	+	"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra"
1271	+	};
1272	+	#endif
1273	+	printf("%s %s register %s\n",
1274	+	transfer_size == SIZE_BYTE ? "byte" :
1275	+	transfer_size == SIZE_WORD ? "word" :
1276	+	transfer_size == SIZE_LONG ? "long" :
1277	+	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1278	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1279	+	mips_gpr_names[reg]);
1280	+	#endif
1281	+
1282	+	regs[MIPS_REG_EPC] += 4;
1283	+	return true;
1284	+	}
1285	+	#endif
1286	+
1287	+	// Decode and skip SPARC instruction
1288	+	#if (defined(sparc) \|\| defined(__sparc__))
1289	+	enum {
1290	+	#if (defined(__sun__))
1291	+	SPARC_REG_G1 = REG_G1,
1292	+	SPARC_REG_O0 = REG_O0,
1293	+	SPARC_REG_PC = REG_PC,
1294	+	SPARC_REG_nPC = REG_nPC
1295	+	#endif
1296	+	};
1297	+	static bool sparc_skip_instruction(unsigned long * regs, gwindows_t * gwins, struct rwindow * rwin)
1298	+	{
1299	+	unsigned int * pc = (unsigned int *)regs[SPARC_REG_PC];
1300	+
1301	+	if (pc == 0)
1302	+	return false;
1303	+
1304	+	#if DEBUG
1305	+	printf("IP: %p [%08x]\n", pc, pc[0]);
1306	+	#endif
1307	+
1308	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1309	+	transfer_size_t transfer_size = SIZE_LONG;
1310	+	bool register_pair = false;
1311	+
1312	+	const unsigned int opcode = pc[0];
1313	+	if ((opcode >> 30) != 3)
1314	+	return false;
1315	+	switch ((opcode >> 19) & 0x3f) {
1316	+	case 9: // Load Signed Byte
1317	+	case 1: // Load Unsigned Byte
1318	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1319	+	transfer_size = SIZE_BYTE;
1320	+	break;
1321	+	case 10:// Load Signed Halfword
1322	+	case 2: // Load Unsigned Word
1323	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1324	+	transfer_size = SIZE_WORD;
1325	+	break;
1326	+	case 8: // Load Word
1327	+	case 0: // Load Unsigned Word
1328	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1329	+	transfer_size = SIZE_LONG;
1330	+	break;
1331	+	case 11:// Load Extended Word
1332	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1333	+	transfer_size = SIZE_QUAD;
1334	+	break;
1335	+	case 3: // Load Doubleword
1336	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1337	+	transfer_size = SIZE_LONG;
1338	+	register_pair = true;
1339	+	break;
1340	+	case 5: // Store Byte
1341	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1342	+	transfer_size = SIZE_BYTE;
1343	+	break;
1344	+	case 6: // Store Halfword
1345	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1346	+	transfer_size = SIZE_WORD;
1347	+	break;
1348	+	case 4: // Store Word
1349	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1350	+	transfer_size = SIZE_LONG;
1351	+	break;
1352	+	case 14:// Store Extended Word
1353	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1354	+	transfer_size = SIZE_QUAD;
1355	+	break;
1356	+	case 7: // Store Doubleword
1357	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1358	+	transfer_size = SIZE_LONG;
1359	+	register_pair = true;
1360	+	break;
1361	+	}
1362	+
1363	+	if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1364	+	// Unknown machine code, let it crash. Then patch the decoder
1365	+	return false;
1366	+	}
1367	+
1368	+	const int reg = (opcode >> 25) & 0x1f;
1369	+
1370	+	#if DEBUG
1371	+	static const char * reg_names[] = {
1372	+	"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
1373	+	"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
1374	+	"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
1375	+	"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7"
1376	+	};
1377	+	printf("%s %s register %s\n",
1378	+	transfer_size == SIZE_BYTE ? "byte" :
1379	+	transfer_size == SIZE_WORD ? "word" :
1380	+	transfer_size == SIZE_LONG ? "long" :
1381	+	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1382	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1383	+	reg_names[reg]);
1384	+	#endif
1385	+
1386	+	// Zero target register in case of a load operation
1387	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != 0) {
1388	+	// FIXME: code to handle local & input registers is not tested
1389	+	if (reg >= 1 && reg < 8) {
1390	+	// global registers
1391	+	regs[reg - 1 + SPARC_REG_G1] = 0;
1392	+	}
1393	+	else if (reg >= 8 && reg < 16) {
1394	+	// output registers
1395	+	regs[reg - 8 + SPARC_REG_O0] = 0;
1396	+	}
1397	+	else if (reg >= 16 && reg < 24) {
1398	+	// local registers (in register windows)
1399	+	if (gwins)
1400	+	gwins->wbuf->rw_local[reg - 16] = 0;
1401	+	else
1402	+	rwin->rw_local[reg - 16] = 0;
1403	+	}
1404	+	else {
1405	+	// input registers (in register windows)
1406	+	if (gwins)
1407	+	gwins->wbuf->rw_in[reg - 24] = 0;
1408	+	else
1409	+	rwin->rw_in[reg - 24] = 0;
1410	+	}
1411	+	}
1412	+
1413	+	regs[SPARC_REG_PC] += 4;
1414	+	regs[SPARC_REG_nPC] += 4;
1415	+	return true;
1416	+	}
1417	+	#endif
1418	+	#endif
1419	+
1420	+	// Decode and skip ARM instruction
1421	+	#if (defined(arm) \|\| defined(__arm__))
1422	+	enum {
1423	+	#if (defined(__linux__))
1424	+	ARM_REG_PC = 15,
1425	+	ARM_REG_CPSR = 16
1426	+	#endif
1427	+	};
1428	+	static bool arm_skip_instruction(unsigned long * regs)
1429	+	{
1430	+	unsigned int * pc = (unsigned int *)regs[ARM_REG_PC];
1431	+
1432	+	if (pc == 0)
1433	+	return false;
1434	+
1435	+	#if DEBUG
1436	+	printf("IP: %p [%08x]\n", pc, pc[0]);
1437	+	#endif
1438	+
1439	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1440	+	transfer_size_t transfer_size = SIZE_UNKNOWN;
1441	+	enum { op_sdt = 1, op_sdth = 2 };
1442	+	int op = 0;
1443	+
1444	+	// Handle load/store instructions only
1445	+	const unsigned int opcode = pc[0];
1446	+	switch ((opcode >> 25) & 7) {
1447	+	case 0: // Halfword and Signed Data Transfer (LDRH, STRH, LDRSB, LDRSH)
1448	+	op = op_sdth;
1449	+	// Determine transfer size (S/H bits)
1450	+	switch ((opcode >> 5) & 3) {
1451	+	case 0: // SWP instruction
1452	+	break;
1453	+	case 1: // Unsigned halfwords
1454	+	case 3: // Signed halfwords
1455	+	transfer_size = SIZE_WORD;
1456	+	break;
1457	+	case 2: // Signed byte
1458	+	transfer_size = SIZE_BYTE;
1459	+	break;
1460	+	}
1461	+	break;
1462	+	case 2:
1463	+	case 3: // Single Data Transfer (LDR, STR)
1464	+	op = op_sdt;
1465	+	// Determine transfer size (B bit)
1466	+	if (((opcode >> 22) & 1) == 1)
1467	+	transfer_size = SIZE_BYTE;
1468	+	else
1469	+	transfer_size = SIZE_LONG;
1470	+	break;
1471	+	default:
1472	+	// FIXME: support load/store mutliple?
1473	+	return false;
1474	+	}
1475	+
1476	+	// Check for invalid transfer size (SWP instruction?)
1477	+	if (transfer_size == SIZE_UNKNOWN)
1478	+	return false;
1479	+
1480	+	// Determine transfer type (L bit)
1481	+	if (((opcode >> 20) & 1) == 1)
1482	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1483	+	else
1484	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1485	+
1486	+	// Compute offset
1487	+	int offset;
1488	+	if (((opcode >> 25) & 1) == 0) {
1489	+	if (op == op_sdt)
1490	+	offset = opcode & 0xfff;
1491	+	else if (op == op_sdth) {
1492	+	int rm = opcode & 0xf;
1493	+	if (((opcode >> 22) & 1) == 0) {
1494	+	// register offset
1495	+	offset = regs[rm];
1496	+	}
1497	+	else {
1498	+	// immediate offset
1499	+	offset = ((opcode >> 4) & 0xf0) \| (opcode & 0x0f);
1500	+	}
1501	+	}
1502	+	}
1503	+	else {
1504	+	const int rm = opcode & 0xf;
1505	+	const int sh = (opcode >> 7) & 0x1f;
1506	+	if (((opcode >> 4) & 1) == 1) {
1507	+	// we expect only legal load/store instructions
1508	+	printf("FATAL: invalid shift operand\n");
1509	+	return false;
1510	+	}
1511	+	const unsigned int v = regs[rm];
1512	+	switch ((opcode >> 5) & 3) {
1513	+	case 0: // logical shift left
1514	+	offset = sh ? v << sh : v;
1515	+	break;
1516	+	case 1: // logical shift right
1517	+	offset = sh ? v >> sh : 0;
1518	+	break;
1519	+	case 2: // arithmetic shift right
1520	+	if (sh)
1521	+	offset = ((signed int)v) >> sh;
1522	+	else
1523	+	offset = (v & 0x80000000) ? 0xffffffff : 0;
1524	+	break;
1525	+	case 3: // rotate right
1526	+	if (sh)
1527	+	offset = (v >> sh) \| (v << (32 - sh));
1528	+	else
1529	+	offset = (v >> 1) \| ((regs[ARM_REG_CPSR] << 2) & 0x80000000);
1530	+	break;
1531	+	}
1532	+	}
1533	+	if (((opcode >> 23) & 1) == 0)
1534	+	offset = -offset;
1535	+
1536	+	int rd = (opcode >> 12) & 0xf;
1537	+	int rn = (opcode >> 16) & 0xf;
1538	+	#if DEBUG
1539	+	static const char * reg_names[] = {
1540	+	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
1541	+	"r9", "r9", "sl", "fp", "ip", "sp", "lr", "pc"
1542	+	};
1543	+	printf("%s %s register %s\n",
1544	+	transfer_size == SIZE_BYTE ? "byte" :
1545	+	transfer_size == SIZE_WORD ? "word" :
1546	+	transfer_size == SIZE_LONG ? "long" : "unknown",
1547	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1548	+	reg_names[rd]);
1549	+	#endif
1550	+
1551	+	unsigned int base = regs[rn];
1552	+	if (((opcode >> 24) & 1) == 1)
1553	+	base += offset;
1554	+
1555	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD)
1556	+	regs[rd] = 0;
1557	+
1558	+	if (((opcode >> 24) & 1) == 0) // post-index addressing
1559	+	regs[rn] += offset;
1560	+	else if (((opcode >> 21) & 1) == 1) // write-back address into base
1561	+	regs[rn] = base;
1562	+
1563	+	regs[ARM_REG_PC] += 4;
1564	+	return true;
1565	+	}
1566	+	#endif
1567	+
1568	+
1569		// Fallbacks
1570		#ifndef SIGSEGV_FAULT_INSTRUCTION
1571		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_INVALID_PC
#	Line 825 \| Line 1587 \| static bool powerpc_skip_instruction(uns
1587		* SIGSEGV global handler
1588		*/
1589
828	–	#if defined(HAVE_SIGSEGV_RECOVERY) \|\| defined(HAVE_MACH_EXCEPTIONS)
1590		// This function handles the badaccess to memory.
1591		// It is called from the signal handler or the exception handler.
1592		static bool handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGLIST_1)
1593		{
1594	+	#ifdef HAVE_MACH_EXCEPTIONS
1595	+	// We must match the initial count when writing back the CPU state registers
1596	+	kern_return_t krc;
1597	+	mach_msg_type_number_t count;
1598	+
1599	+	count = SIGSEGV_THREAD_STATE_COUNT;
1600	+	krc = thread_get_state(thread, SIGSEGV_THREAD_STATE_FLAVOR, (thread_state_t)state, &count);
1601	+	MACH_CHECK_ERROR (thread_get_state, krc);
1602	+	#endif
1603	+
1604		sigsegv_address_t fault_address = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
1605		sigsegv_address_t fault_instruction = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
1606
#	Line 848 \| Line 1619 \| static bool handle_badaccess(SIGSEGV_FAU
1619		// is modified off of the stack, in Mach we
1620		// need to actually call thread_set_state to
1621		// have the register values updated.
851	–	kern_return_t krc;
852	–
1622		krc = thread_set_state(thread,
1623	<	MACHINE_THREAD_STATE, (thread_state_t)state,
1624	<	MACHINE_THREAD_STATE_COUNT);
1625	<	MACH_CHECK_ERROR (thread_get_state, krc);
1623	>	SIGSEGV_THREAD_STATE_FLAVOR, (thread_state_t)state,
1624	>	count);
1625	>	MACH_CHECK_ERROR (thread_set_state, krc);
1626		#endif
1627		return true;
1628		}
1629		break;
1630		#endif
1631	+	case SIGSEGV_RETURN_FAILURE:
1632	+	// We can't do anything with the fault_address, dump state?
1633	+	if (sigsegv_state_dumper != 0)
1634	+	sigsegv_state_dumper(fault_address, fault_instruction);
1635	+	break;
1636		}
863	–
864	–	// We can't do anything with the fault_address, dump state?
865	–	if (sigsegv_state_dumper != 0)
866	–	sigsegv_state_dumper(fault_address, fault_instruction);
1637
1638		return false;
1639		}
870	–	#endif
1640
1641
1642		/*
#	Line 904 \| Line 1673 \| forward_exception(mach_port_t thread_por
1673		mach_port_t port;
1674		exception_behavior_t behavior;
1675		thread_state_flavor_t flavor;
1676	<	thread_state_t thread_state;
1676	>	thread_state_data_t thread_state;
1677		mach_msg_type_number_t thread_state_count;
1678
1679		for (portIndex = 0; portIndex < oldExceptionPorts->maskCount; portIndex++) {
#	Line 929 \| Line 1698 \| forward_exception(mach_port_t thread_por
1698
1699		if (behavior != EXCEPTION_DEFAULT) {
1700		thread_state_count = THREAD_STATE_MAX;
1701	<	kret = thread_get_state (thread_port, flavor, thread_state,
1701	>	kret = thread_get_state (thread_port, flavor, (natural_t *)&thread_state,
1702		&thread_state_count);
1703		MACH_CHECK_ERROR (thread_get_state, kret);
1704		}
#	Line 945 \| Line 1714 \| forward_exception(mach_port_t thread_por
1714		// fprintf(stderr, "forwarding to exception_raise_state\n");
1715		kret = exception_raise_state(port, exception_type, exception_data,
1716		data_count, &flavor,
1717	<	thread_state, thread_state_count,
1718	<	thread_state, &thread_state_count);
1717	>	(natural_t *)&thread_state, thread_state_count,
1718	>	(natural_t *)&thread_state, &thread_state_count);
1719		MACH_CHECK_ERROR (exception_raise_state, kret);
1720		break;
1721		case EXCEPTION_STATE_IDENTITY:
#	Line 954 \| Line 1723 \| forward_exception(mach_port_t thread_por
1723		kret = exception_raise_state_identity(port, thread_port, task_port,
1724		exception_type, exception_data,
1725		data_count, &flavor,
1726	<	thread_state, thread_state_count,
1727	<	thread_state, &thread_state_count);
1726	>	(natural_t *)&thread_state, thread_state_count,
1727	>	(natural_t *)&thread_state, &thread_state_count);
1728		MACH_CHECK_ERROR (exception_raise_state_identity, kret);
1729		break;
1730		default:
#	Line 964 \| Line 1733 \| forward_exception(mach_port_t thread_por
1733		}
1734
1735		if (behavior != EXCEPTION_DEFAULT) {
1736	<	kret = thread_set_state (thread_port, flavor, thread_state,
1736	>	kret = thread_set_state (thread_port, flavor, (natural_t *)&thread_state,
1737		thread_state_count);
1738		MACH_CHECK_ERROR (thread_set_state, kret);
1739		}
#	Line 999 \| Line 1768 \| catch_exception_raise(mach_port_t except
1768		exception_data_t code,
1769		mach_msg_type_number_t codeCount)
1770		{
1771	<	ppc_thread_state_t state;
1771	>	SIGSEGV_THREAD_STATE_TYPE state;
1772		kern_return_t krc;
1773
1774		if ((exception == EXC_BAD_ACCESS) && (codeCount >= 2)) {
#	Line 1138 \| Line 1907 \| static bool sigsegv_do_install_handler(s
1907		// addressing modes) used in PPC instructions, you will need the
1908		// GPR state anyway.
1909		krc = thread_set_exception_ports(mach_thread_self(), EXC_MASK_BAD_ACCESS, _exceptionPort,
1910	<	EXCEPTION_DEFAULT, MACHINE_THREAD_STATE);
1910	>	EXCEPTION_DEFAULT, SIGSEGV_THREAD_STATE_FLAVOR);
1911		if (krc != KERN_SUCCESS) {
1912		mach_error("thread_set_exception_ports", krc);
1913		return false;
#	Line 1161 \| Line 1930 \| static bool sigsegv_do_install_handler(s
1930		}
1931		#endif
1932
1933	+	#ifdef HAVE_WIN32_EXCEPTIONS
1934	+	static LONG WINAPI main_exception_filter(EXCEPTION_POINTERS *ExceptionInfo)
1935	+	{
1936	+	if (sigsegv_fault_handler != NULL
1937	+	&& ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION
1938	+	&& ExceptionInfo->ExceptionRecord->NumberParameters == 2
1939	+	&& handle_badaccess(ExceptionInfo))
1940	+	return EXCEPTION_CONTINUE_EXECUTION;
1941	+
1942	+	return EXCEPTION_CONTINUE_SEARCH;
1943	+	}
1944	+
1945	+	#if defined __CYGWIN__ && defined __i386__
1946	+	/* In Cygwin programs, SetUnhandledExceptionFilter has no effect because Cygwin
1947	+	installs a global exception handler. We have to dig deep in order to install
1948	+	our main_exception_filter. */
1949	+
1950	+	/* Data structures for the current thread's exception handler chain.
1951	+	On the x86 Windows uses register fs, offset 0 to point to the current
1952	+	exception handler; Cygwin mucks with it, so we must do the same... :-/ */
1953	+
1954	+	/* Magic taken from winsup/cygwin/include/exceptions.h. */
1955	+
1956	+	struct exception_list {
1957	+	struct exception_list *prev;
1958	+	int (handler) (EXCEPTION_RECORD , void , CONTEXT , void *);
1959	+	};
1960	+	typedef struct exception_list exception_list;
1961	+
1962	+	/* Magic taken from winsup/cygwin/exceptions.cc. */
1963	+
1964	+	__asm__ (".equ __except_list,0");
1965	+
1966	+	extern exception_list *_except_list __asm__ ("%fs:__except_list");
1967	+
1968	+	/* For debugging. _except_list is not otherwise accessible from gdb. */
1969	+	static exception_list *
1970	+	debug_get_except_list ()
1971	+	{
1972	+	return _except_list;
1973	+	}
1974	+
1975	+	/* Cygwin's original exception handler. */
1976	+	static int (cygwin_exception_handler) (EXCEPTION_RECORD , void , CONTEXT , void *);
1977	+
1978	+	/* Our exception handler. */
1979	+	static int
1980	+	libsigsegv_exception_handler (EXCEPTION_RECORD exception, void frame, CONTEXT context, void dispatch)
1981	+	{
1982	+	EXCEPTION_POINTERS ExceptionInfo;
1983	+	ExceptionInfo.ExceptionRecord = exception;
1984	+	ExceptionInfo.ContextRecord = context;
1985	+	if (main_exception_filter (&ExceptionInfo) == EXCEPTION_CONTINUE_SEARCH)
1986	+	return cygwin_exception_handler (exception, frame, context, dispatch);
1987	+	else
1988	+	return 0;
1989	+	}
1990	+
1991	+	static void
1992	+	do_install_main_exception_filter ()
1993	+	{
1994	+	/* We cannot insert any handler into the chain, because such handlers
1995	+	must lie on the stack (?). Instead, we have to replace(!) Cygwin's
1996	+	global exception handler. */
1997	+	cygwin_exception_handler = _except_list->handler;
1998	+	_except_list->handler = libsigsegv_exception_handler;
1999	+	}
2000	+
2001	+	#else
2002	+
2003	+	static void
2004	+	do_install_main_exception_filter ()
2005	+	{
2006	+	SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) &main_exception_filter);
2007	+	}
2008	+	#endif
2009	+
2010	+	static bool sigsegv_do_install_handler(sigsegv_fault_handler_t handler)
2011	+	{
2012	+	static bool main_exception_filter_installed = false;
2013	+	if (!main_exception_filter_installed) {
2014	+	do_install_main_exception_filter();
2015	+	main_exception_filter_installed = true;
2016	+	}
2017	+	sigsegv_fault_handler = handler;
2018	+	return true;
2019	+	}
2020	+	#endif
2021	+
2022		bool sigsegv_install_handler(sigsegv_fault_handler_t handler)
2023		{
2024		#if defined(HAVE_SIGSEGV_RECOVERY)
#	Line 1171 \| Line 2029 \| bool sigsegv_install_handler(sigsegv_fau
2029		if (success)
2030		sigsegv_fault_handler = handler;
2031		return success;
2032	<	#elif defined(HAVE_MACH_EXCEPTIONS)
2032	>	#elif defined(HAVE_MACH_EXCEPTIONS) \|\| defined(HAVE_WIN32_EXCEPTIONS)
2033		return sigsegv_do_install_handler(handler);
2034		#else
2035		// FAIL: no siginfo_t nor sigcontext subterfuge is available
#	Line 1197 \| Line 2055 \| void sigsegv_deinstall_handler(void)
2055		SIGSEGV_ALL_SIGNALS
2056		#undef FAULT_HANDLER
2057		#endif
2058	+	#ifdef HAVE_WIN32_EXCEPTIONS
2059	+	sigsegv_fault_handler = NULL;
2060	+	#endif
2061		}
2062
2063
#	Line 1218 \| Line 2079 \| void sigsegv_set_dump_state(sigsegv_stat
2079		#include <stdio.h>
2080		#include <stdlib.h>
2081		#include <fcntl.h>
2082	+	#ifdef HAVE_SYS_MMAN_H
2083		#include <sys/mman.h>
2084	+	#endif
2085		#include "vm_alloc.h"
2086
2087		const int REF_INDEX = 123;
#	Line 1228 \| Line 2091 \| static int page_size;
2091		static volatile char * page = 0;
2092		static volatile int handler_called = 0;
2093
2094	+	/* Barriers */
2095	+	#ifdef __GNUC__
2096	+	#define BARRIER() asm volatile ("" : : : "memory")
2097	+	#else
2098	+	#define BARRIER() /* nothing */
2099	+	#endif
2100	+
2101		#ifdef __GNUC__
2102		// Code range where we expect the fault to come from
2103		static void b_region, e_region;
#	Line 1235 \| Line 2105 \| *static void b_region, e_region;*
2105
2106		static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
2107		{
2108	+	#if DEBUG
2109	+	printf("sigsegv_test_handler(%p, %p)\n", fault_address, instruction_address);
2110	+	printf("expected fault at %p\n", page + REF_INDEX);
2111	+	#ifdef __GNUC__
2112	+	printf("expected instruction address range: %p-%p\n", b_region, e_region);
2113	+	#endif
2114	+	#endif
2115		handler_called++;
2116		if ((fault_address - REF_INDEX) != page)
2117		exit(10);
#	Line 1254 \| Line 2131 \| static sigsegv_return_t sigsegv_test_han
2131		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
2132		static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
2133		{
2134	+	#if DEBUG
2135	+	printf("sigsegv_insn_handler(%p, %p)\n", fault_address, instruction_address);
2136	+	#endif
2137		if (((unsigned long)fault_address - (unsigned long)page) < page_size) {
2138		#ifdef __GNUC__
2139		// Make sure reported fault instruction address falls into
#	Line 1268 \| Line 2148 \| static sigsegv_return_t sigsegv_insn_han
2148
2149		return SIGSEGV_RETURN_FAILURE;
2150		}
2151	+
2152	+	// More sophisticated tests for instruction skipper
2153	+	static bool arch_insn_skipper_tests()
2154	+	{
2155	+	#if (defined(i386) \|\| defined(__i386__)) \|\| defined(__x86_64__)
2156	+	static const unsigned char code[] = {
2157	+	0x8a, 0x00, // mov (%eax),%al
2158	+	0x8a, 0x2c, 0x18, // mov (%eax,%ebx,1),%ch
2159	+	0x88, 0x20, // mov %ah,(%eax)
2160	+	0x88, 0x08, // mov %cl,(%eax)
2161	+	0x66, 0x8b, 0x00, // mov (%eax),%ax
2162	+	0x66, 0x8b, 0x0c, 0x18, // mov (%eax,%ebx,1),%cx
2163	+	0x66, 0x89, 0x00, // mov %ax,(%eax)
2164	+	0x66, 0x89, 0x0c, 0x18, // mov %cx,(%eax,%ebx,1)
2165	+	0x8b, 0x00, // mov (%eax),%eax
2166	+	0x8b, 0x0c, 0x18, // mov (%eax,%ebx,1),%ecx
2167	+	0x89, 0x00, // mov %eax,(%eax)
2168	+	0x89, 0x0c, 0x18, // mov %ecx,(%eax,%ebx,1)
2169	+	#if defined(__x86_64__)
2170	+	0x44, 0x8a, 0x00, // mov (%rax),%r8b
2171	+	0x44, 0x8a, 0x20, // mov (%rax),%r12b
2172	+	0x42, 0x8a, 0x3c, 0x10, // mov (%rax,%r10,1),%dil
2173	+	0x44, 0x88, 0x00, // mov %r8b,(%rax)
2174	+	0x44, 0x88, 0x20, // mov %r12b,(%rax)
2175	+	0x42, 0x88, 0x3c, 0x10, // mov %dil,(%rax,%r10,1)
2176	+	0x66, 0x44, 0x8b, 0x00, // mov (%rax),%r8w
2177	+	0x66, 0x42, 0x8b, 0x0c, 0x10, // mov (%rax,%r10,1),%cx
2178	+	0x66, 0x44, 0x89, 0x00, // mov %r8w,(%rax)
2179	+	0x66, 0x42, 0x89, 0x0c, 0x10, // mov %cx,(%rax,%r10,1)
2180	+	0x44, 0x8b, 0x00, // mov (%rax),%r8d
2181	+	0x42, 0x8b, 0x0c, 0x10, // mov (%rax,%r10,1),%ecx
2182	+	0x44, 0x89, 0x00, // mov %r8d,(%rax)
2183	+	0x42, 0x89, 0x0c, 0x10, // mov %ecx,(%rax,%r10,1)
2184	+	0x48, 0x8b, 0x08, // mov (%rax),%rcx
2185	+	0x4c, 0x8b, 0x18, // mov (%rax),%r11
2186	+	0x4a, 0x8b, 0x0c, 0x10, // mov (%rax,%r10,1),%rcx
2187	+	0x4e, 0x8b, 0x1c, 0x10, // mov (%rax,%r10,1),%r11
2188	+	0x48, 0x89, 0x08, // mov %rcx,(%rax)
2189	+	0x4c, 0x89, 0x18, // mov %r11,(%rax)
2190	+	0x4a, 0x89, 0x0c, 0x10, // mov %rcx,(%rax,%r10,1)
2191	+	0x4e, 0x89, 0x1c, 0x10, // mov %r11,(%rax,%r10,1)
2192	+	#endif
2193	+	0 // end
2194	+	};
2195	+	const int N_REGS = 20;
2196	+	unsigned long regs[N_REGS];
2197	+	for (int i = 0; i < N_REGS; i++)
2198	+	regs[i] = i;
2199	+	const unsigned long start_code = (unsigned long)&code;
2200	+	regs[X86_REG_EIP] = start_code;
2201	+	while ((regs[X86_REG_EIP] - start_code) < (sizeof(code) - 1)
2202	+	&& ix86_skip_instruction(regs))
2203	+	; /* simply iterate */
2204	+	return (regs[X86_REG_EIP] - start_code) == (sizeof(code) - 1);
2205	+	#endif
2206	+	return true;
2207	+	}
2208		#endif
2209
2210		int main(void)
#	Line 1275 \| Line 2212 \| int main(void)
2212		if (vm_init() < 0)
2213		return 1;
2214
2215	<	page_size = getpagesize();
2215	>	page_size = vm_get_page_size();
2216		if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED)
2217		return 2;
2218
#	Line 1295 \| Line 2232 \| int main(void)
2232		if (page[REF_INDEX] != REF_VALUE)
2233		exit(20);
2234		page[REF_INDEX] = REF_VALUE;
2235	+	BARRIER();
2236		L_e_region1:
2237
2238		if (handler_called != 1)
#	Line 1314 \| Line 2252 \| int main(void)
2252		return 8;
2253
2254		#define TEST_SKIP_INSTRUCTION(TYPE) do { \
2255	<	const unsigned int TAG = 0x12345678; \
2255	>	const unsigned long TAG = 0x12345678 \| \
2256	>	(sizeof(long) == 8 ? 0x9abcdef0UL << 31 : 0); \
2257		TYPE data = ((TYPE )(page + sizeof(TYPE))); \
2258	<	volatile unsigned int effect = data + TAG; \
2258	>	volatile unsigned long effect = data + TAG; \
2259		if (effect != TAG) \
2260		return 9; \
2261		} while (0)
#	Line 1329 \| Line 2268 \| int main(void)
2268		TEST_SKIP_INSTRUCTION(unsigned char);
2269		TEST_SKIP_INSTRUCTION(unsigned short);
2270		TEST_SKIP_INSTRUCTION(unsigned int);
2271	+	TEST_SKIP_INSTRUCTION(unsigned long);
2272	+	TEST_SKIP_INSTRUCTION(signed char);
2273	+	TEST_SKIP_INSTRUCTION(signed short);
2274	+	TEST_SKIP_INSTRUCTION(signed int);
2275	+	TEST_SKIP_INSTRUCTION(signed long);
2276	+	BARRIER();
2277		L_e_region2:
2278	+
2279	+	if (!arch_insn_skipper_tests())
2280	+	return 20;
2281		#endif
2282
2283		vm_exit();
2284		return 0;
2285		}
2286		#endif
1339	–
1340	–
1341	–
1342	–
1343	–
1344	–
1345	–
1346	–
1347	–
1348	–
1349	–
1350	–
1351	–
1352	–
1353	–

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Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents): Revision 1.33 by gbeauche, 2003-10-21T23:10:19Z vs. Revision 1.61 by gbeauche, 2006-02-27T13:38:52Z

Diff Legend

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.33 by gbeauche, 2003-10-21T23:10:19Z vs.
Revision 1.61 by gbeauche, 2006-02-27T13:38:52Z