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root/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 1.68 by gbeauche, 2007-12-30T12:11:17Z

#	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 65 | Line 66 | static bool sigsegv_do_install_handler(i
66		*  Instruction decoding aids
67		*/
68
69	+	// Transfer type
70	+	enum transfer_type_t {
71	+	SIGSEGV_TRANSFER_UNKNOWN        = 0,
72	+	SIGSEGV_TRANSFER_LOAD           = 1,
73	+	SIGSEGV_TRANSFER_STORE          = 2,
74	+	};
75	+
76		// Transfer size
77		enum transfer_size_t {
78		SIZE_UNKNOWN,
79		SIZE_BYTE,
80	<	SIZE_WORD,
81	<	SIZE_LONG
80	>	SIZE_WORD, // 2 bytes
81	>	SIZE_LONG, // 4 bytes
82	>	SIZE_QUAD, // 8 bytes
83		};
84
76	–	// Transfer type
77	–	typedef sigsegv_transfer_type_t transfer_type_t;
78	–
85		#if (defined(powerpc) || defined(__powerpc__) || defined(__ppc__))
86		// Addressing mode
87		enum addressing_mode_t {
#	Line 95 | Line 101 | struct instruction_t {
101		char                            ra, rd;
102		};
103
104	<	static void powerpc_decode_instruction(instruction_t *instruction, unsigned int nip, unsigned int * gpr)
104	>	static void powerpc_decode_instruction(instruction_t *instruction, unsigned int nip, unsigned long * gpr)
105		{
106		// Get opcode and divide into fields
107	<	unsigned int opcode = *((unsigned int *)nip);
107	>	unsigned int opcode = *((unsigned int *)(unsigned long)nip);
108		unsigned int primop = opcode >> 26;
109		unsigned int exop = (opcode >> 1) & 0x3ff;
110		unsigned int ra = (opcode >> 16) & 0x1f;
#	Line 172 | Line 178 | static void powerpc_decode_instruction(i
178		transfer_type = SIGSEGV_TRANSFER_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_NORM; break;
179		case 45:        // sthu
180		transfer_type = SIGSEGV_TRANSFER_STORE; transfer_size = SIZE_WORD; addr_mode = MODE_U; break;
181	+	case 58:        // ld, ldu, lwa
182	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
183	+	transfer_size = SIZE_QUAD;
184	+	addr_mode = ((opcode & 3) == 1) ? MODE_U : MODE_NORM;
185	+	imm &= ~3;
186	+	break;
187	+	case 62:        // std, stdu, stq
188	+	transfer_type = SIGSEGV_TRANSFER_STORE;
189	+	transfer_size = SIZE_QUAD;
190	+	addr_mode = ((opcode & 3) == 1) ? MODE_U : MODE_NORM;
191	+	imm &= ~3;
192	+	break;
193		}
194
195		// Calculate effective address
#	Line 212 | Line 230 | static void powerpc_decode_instruction(i
230
231		#if HAVE_SIGINFO_T
232		// Generic extended signal handler
233	<	#if defined(__NetBSD__) || defined(__FreeBSD__)
233	>	#if defined(__FreeBSD__)
234		#define SIGSEGV_ALL_SIGNALS                             FAULT_HANDLER(SIGBUS)
235		#else
236		#define SIGSEGV_ALL_SIGNALS                             FAULT_HANDLER(SIGSEGV)
#	Line 221 | Line 239 | static void powerpc_decode_instruction(i
239		#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 siginfo_t *sip, void *scp
240		#define SIGSEGV_FAULT_HANDLER_ARGS              sip, scp
241		#define SIGSEGV_FAULT_ADDRESS                   sip->si_addr
242	+	#if (defined(sgi) || defined(__sgi))
243	+	#include <ucontext.h>
244	+	#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.gregs)
245	+	#define SIGSEGV_FAULT_INSTRUCTION               (unsigned long)SIGSEGV_CONTEXT_REGS[CTX_EPC]
246	+	#if (defined(mips) || defined(__mips))
247	+	#define SIGSEGV_REGISTER_FILE                   &SIGSEGV_CONTEXT_REGS[CTX_EPC], &SIGSEGV_CONTEXT_REGS[CTX_R0]
248	+	#define SIGSEGV_SKIP_INSTRUCTION                mips_skip_instruction
249	+	#endif
250	+	#endif
251		#if defined(__sun__)
252		#if (defined(sparc) || defined(__sparc__))
253	+	#include <sys/stack.h>
254	+	#include <sys/regset.h>
255		#include <sys/ucontext.h>
256		#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.gregs)
257		#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS[REG_PC]
258	+	#define SIGSEGV_SPARC_GWINDOWS                  (((ucontext_t *)scp)->uc_mcontext.gwins)
259	+	#define SIGSEGV_SPARC_RWINDOW                   (struct rwindow *)((char *)SIGSEGV_CONTEXT_REGS[REG_SP] + STACK_BIAS)
260	+	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)SIGSEGV_CONTEXT_REGS), SIGSEGV_SPARC_GWINDOWS, SIGSEGV_SPARC_RWINDOW
261	+	#define SIGSEGV_SKIP_INSTRUCTION                sparc_skip_instruction
262	+	#endif
263	+	#if defined(__i386__)
264	+	#include <sys/regset.h>
265	+	#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.gregs)
266	+	#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS[EIP]
267	+	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)SIGSEGV_CONTEXT_REGS
268	+	#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
269		#endif
270		#endif
271	<	#if defined(__FreeBSD__)
271	>	#if defined(__FreeBSD__) || defined(__OpenBSD__)
272		#if (defined(i386) || defined(__i386__))
273		#define SIGSEGV_FAULT_INSTRUCTION               (((struct sigcontext *)scp)->sc_eip)
274	<	#define SIGSEGV_REGISTER_FILE                   ((unsigned int *)&(((struct sigcontext *)scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
274	>	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&(((struct sigcontext *)scp)->sc_edi)) /* EDI is the first GPR (even below EIP) in sigcontext */
275	>	#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
276	>	#endif
277	>	#endif
278	>	#if defined(__NetBSD__)
279	>	#if (defined(i386) || defined(__i386__))
280	>	#include <sys/ucontext.h>
281	>	#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.__gregs)
282	>	#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS[_REG_EIP]
283	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)SIGSEGV_CONTEXT_REGS
284		#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
285		#endif
286	+	#if (defined(powerpc) || defined(__powerpc__))
287	+	#include <sys/ucontext.h>
288	+	#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.__gregs)
289	+	#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS[_REG_PC]
290	+	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&SIGSEGV_CONTEXT_REGS[_REG_PC], (unsigned long *)&SIGSEGV_CONTEXT_REGS[_REG_R0]
291	+	#define SIGSEGV_SKIP_INSTRUCTION                powerpc_skip_instruction
292	+	#endif
293		#endif
294		#if defined(__linux__)
295		#if (defined(i386) || defined(__i386__))
296		#include <sys/ucontext.h>
297		#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.gregs)
298		#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS[14] /* should use REG_EIP instead */
299	<	#define SIGSEGV_REGISTER_FILE                   (unsigned int *)SIGSEGV_CONTEXT_REGS
299	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)SIGSEGV_CONTEXT_REGS
300		#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
301		#endif
302		#if (defined(x86_64) || defined(__x86_64__))
#	Line 248 | Line 304 | static void powerpc_decode_instruction(i
304		#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.gregs)
305		#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS[16] /* should use REG_RIP instead */
306		#define SIGSEGV_REGISTER_FILE                   (unsigned long *)SIGSEGV_CONTEXT_REGS
307	+	#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
308		#endif
309		#if (defined(ia64) || defined(__ia64__))
310		#define SIGSEGV_FAULT_INSTRUCTION               (((struct sigcontext *)scp)->sc_ip & ~0x3ULL) /* slot number is in bits 0 and 1 */
#	Line 256 | Line 313 | static void powerpc_decode_instruction(i
313		#include <sys/ucontext.h>
314		#define SIGSEGV_CONTEXT_REGS                    (((ucontext_t *)scp)->uc_mcontext.regs)
315		#define SIGSEGV_FAULT_INSTRUCTION               (SIGSEGV_CONTEXT_REGS->nip)
316	<	#define SIGSEGV_REGISTER_FILE                   (unsigned int *)&SIGSEGV_CONTEXT_REGS->nip, (unsigned int *)(SIGSEGV_CONTEXT_REGS->gpr)
316	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&SIGSEGV_CONTEXT_REGS->nip, (unsigned long *)(SIGSEGV_CONTEXT_REGS->gpr)
317		#define SIGSEGV_SKIP_INSTRUCTION                powerpc_skip_instruction
318		#endif
319	+	#if (defined(hppa) || defined(__hppa__))
320	+	#undef  SIGSEGV_FAULT_ADDRESS
321	+	#define SIGSEGV_FAULT_ADDRESS                   sip->si_ptr
322	+	#endif
323	+	#if (defined(arm) || defined(__arm__))
324	+	#include <asm/ucontext.h> /* use kernel structure, glibc may not be in sync */
325	+	#define SIGSEGV_CONTEXT_REGS                    (((struct ucontext *)scp)->uc_mcontext)
326	+	#define SIGSEGV_FAULT_INSTRUCTION               (SIGSEGV_CONTEXT_REGS.arm_pc)
327	+	#define SIGSEGV_REGISTER_FILE                   (&SIGSEGV_CONTEXT_REGS.arm_r0)
328	+	#define SIGSEGV_SKIP_INSTRUCTION                arm_skip_instruction
329	+	#endif
330	+	#if (defined(mips) || defined(__mips__))
331	+	#include <sys/ucontext.h>
332	+	#define SIGSEGV_CONTEXT_REGS                    (((struct ucontext *)scp)->uc_mcontext)
333	+	#define SIGSEGV_FAULT_INSTRUCTION               (SIGSEGV_CONTEXT_REGS.pc)
334	+	#define SIGSEGV_REGISTER_FILE                   &SIGSEGV_CONTEXT_REGS.pc, &SIGSEGV_CONTEXT_REGS.gregs[0]
335	+	#define SIGSEGV_SKIP_INSTRUCTION                mips_skip_instruction
336	+	#endif
337		#endif
338		#endif
339
#	Line 273 | Line 348 | static void powerpc_decode_instruction(i
348		#define SIGSEGV_FAULT_HANDLER_ARGS              &scs
349		#define SIGSEGV_FAULT_ADDRESS                   scp->cr2
350		#define SIGSEGV_FAULT_INSTRUCTION               scp->eip
351	<	#define SIGSEGV_REGISTER_FILE                   (unsigned int *)scp
351	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)scp
352		#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
353		#endif
354		#if (defined(sparc) || defined(__sparc__))
#	Line 288 | Line 363 | static void powerpc_decode_instruction(i
363		#define SIGSEGV_FAULT_HANDLER_ARGS              sig, scp
364		#define SIGSEGV_FAULT_ADDRESS                   scp->regs->dar
365		#define SIGSEGV_FAULT_INSTRUCTION               scp->regs->nip
366	<	#define SIGSEGV_REGISTER_FILE                   (unsigned int *)&scp->regs->nip, (unsigned int *)(scp->regs->gpr)
366	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&scp->regs->nip, (unsigned long *)(scp->regs->gpr)
367		#define SIGSEGV_SKIP_INSTRUCTION                powerpc_skip_instruction
368		#endif
369		#if (defined(alpha) || defined(__alpha__))
#	Line 298 | Line 373 | static void powerpc_decode_instruction(i
373		#define SIGSEGV_FAULT_ADDRESS                   get_fault_address(scp)
374		#define SIGSEGV_FAULT_INSTRUCTION               scp->sc_pc
375		#endif
376	+	#if (defined(arm) || defined(__arm__))
377	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST   int sig, int r1, int r2, int r3, struct sigcontext sc
378	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 struct sigcontext *scp
379	+	#define SIGSEGV_FAULT_HANDLER_ARGS              &sc
380	+	#define SIGSEGV_FAULT_ADDRESS                   scp->fault_address
381	+	#define SIGSEGV_FAULT_INSTRUCTION               scp->arm_pc
382	+	#define SIGSEGV_REGISTER_FILE                   &scp->arm_r0
383	+	#define SIGSEGV_SKIP_INSTRUCTION                arm_skip_instruction
384	+	#endif
385		#endif
386
387		// Irix 5 or 6 on MIPS
388	<	#if (defined(sgi) || defined(__sgi)) && (defined(SYSTYPE_SVR4) || defined(__SYSTYPE_SVR4))
388	>	#if (defined(sgi) || defined(__sgi)) && (defined(SYSTYPE_SVR4) || defined(_SYSTYPE_SVR4))
389		#include <ucontext.h>
390		#define SIGSEGV_FAULT_HANDLER_ARGLIST   int sig, int code, struct sigcontext *scp
391		#define SIGSEGV_FAULT_HANDLER_ARGS              sig, code, scp
392	<	#define SIGSEGV_FAULT_ADDRESS                   scp->sc_badvaddr
392	>	#define SIGSEGV_FAULT_ADDRESS                   (unsigned long)scp->sc_badvaddr
393	>	#define SIGSEGV_FAULT_INSTRUCTION               (unsigned long)scp->sc_pc
394		#define SIGSEGV_ALL_SIGNALS                             FAULT_HANDLER(SIGSEGV)
395		#endif
396
#	Line 378 | Line 463 | static sigsegv_address_t get_fault_addre
463		#endif
464		#endif
465		#if defined(__FreeBSD__)
381	–	#define SIGSEGV_ALL_SIGNALS                             FAULT_HANDLER(SIGBUS)
466		#if (defined(i386) || defined(__i386__))
467	+	#define SIGSEGV_ALL_SIGNALS                             FAULT_HANDLER(SIGBUS)
468		#define SIGSEGV_FAULT_HANDLER_ARGLIST   int sig, int code, struct sigcontext *scp, char *addr
469		#define SIGSEGV_FAULT_HANDLER_ARGS              sig, code, scp, addr
470		#define SIGSEGV_FAULT_ADDRESS                   addr
471		#define SIGSEGV_FAULT_INSTRUCTION               scp->sc_eip
472	<	#define SIGSEGV_REGISTER_FILE                   ((unsigned int *)&scp->sc_edi)
472	>	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&scp->sc_edi)
473		#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
474		#endif
475	+	#if (defined(alpha) || defined(__alpha__))
476	+	#define SIGSEGV_ALL_SIGNALS                             FAULT_HANDLER(SIGSEGV)
477	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST   int sig, char *addr, struct sigcontext *scp
478	+	#define SIGSEGV_FAULT_HANDLER_ARGS              sig, addr, scp
479	+	#define SIGSEGV_FAULT_ADDRESS                   addr
480	+	#define SIGSEGV_FAULT_INSTRUCTION               scp->sc_pc
481	+	#endif
482		#endif
483
484		// Extract fault address out of a sigcontext
#	Line 435 | Line 527 | static sigsegv_address_t get_fault_addre
527		#endif
528		#endif
529
530	+	#if HAVE_WIN32_EXCEPTIONS
531	+	#define WIN32_LEAN_AND_MEAN /* avoid including junk */
532	+	#include <windows.h>
533	+	#include <winerror.h>
534	+
535	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST   EXCEPTION_POINTERS *ExceptionInfo
536	+	#define SIGSEGV_FAULT_HANDLER_ARGS              ExceptionInfo
537	+	#define SIGSEGV_FAULT_ADDRESS                   ExceptionInfo->ExceptionRecord->ExceptionInformation[1]
538	+	#define SIGSEGV_CONTEXT_REGS                    ExceptionInfo->ContextRecord
539	+	#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_CONTEXT_REGS->Eip
540	+	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&SIGSEGV_CONTEXT_REGS->Edi)
541	+	#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
542	+	#endif
543	+
544		#if HAVE_MACH_EXCEPTIONS
545
546		// This can easily be extended to other Mach systems, but really who
#	Line 495 | Line 601 | if (ret != KERN_SUCCESS) { \
601		exit (1); \
602		}
603
604	<	#define SIGSEGV_FAULT_ADDRESS                   code[1]
605	<	#define SIGSEGV_FAULT_INSTRUCTION               get_fault_instruction(thread, state)
606	<	#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP)  ((code[0] == KERN_PROTECTION_FAILURE) ? sigsegv_fault_handler(ADDR, IP) : SIGSEGV_RETURN_FAILURE)
607	<	#define SIGSEGV_FAULT_HANDLER_ARGLIST   mach_port_t thread, exception_data_t code, ppc_thread_state_t *state
608	<	#define SIGSEGV_FAULT_HANDLER_ARGS              thread, code, &state
604	>	#ifdef __ppc__
605	>	#define SIGSEGV_EXCEPTION_STATE_TYPE    ppc_exception_state_t
606	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR  PPC_EXCEPTION_STATE
607	>	#define SIGSEGV_EXCEPTION_STATE_COUNT   PPC_EXCEPTION_STATE_COUNT
608	>	#define SIGSEGV_FAULT_ADDRESS                   sip->exc_state.dar
609	>	#define SIGSEGV_THREAD_STATE_TYPE               ppc_thread_state_t
610	>	#define SIGSEGV_THREAD_STATE_FLAVOR             PPC_THREAD_STATE
611	>	#define SIGSEGV_THREAD_STATE_COUNT              PPC_THREAD_STATE_COUNT
612	>	#define SIGSEGV_FAULT_INSTRUCTION               sip->thr_state.srr0
613		#define SIGSEGV_SKIP_INSTRUCTION                powerpc_skip_instruction
614	<	#define SIGSEGV_REGISTER_FILE                   &state->srr0, &state->r0
615	<
616	<	// Given a suspended thread, stuff the current instruction and
617	<	// registers into state.
618	<	//
619	<	// It would have been nice to have this be ppc/x86 independant which
620	<	// could have been done easily with a thread_state_t instead of
621	<	// ppc_thread_state_t, but because of the way this is called it is
622	<	// easier to do it this way.
623	<	#if (defined(ppc) || defined(__ppc__))
624	<	static inline sigsegv_address_t get_fault_instruction(mach_port_t thread, ppc_thread_state_t *state)
625	<	{
626	<	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	<	}
614	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&sip->thr_state.srr0, (unsigned long *)&sip->thr_state.r0
615	>	#endif
616	>	#ifdef __i386__
617	>	#define SIGSEGV_EXCEPTION_STATE_TYPE    struct i386_exception_state
618	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR  i386_EXCEPTION_STATE
619	>	#define SIGSEGV_EXCEPTION_STATE_COUNT   i386_EXCEPTION_STATE_COUNT
620	>	#define SIGSEGV_FAULT_ADDRESS                   sip->exc_state.faultvaddr
621	>	#define SIGSEGV_THREAD_STATE_TYPE               struct i386_thread_state
622	>	#define SIGSEGV_THREAD_STATE_FLAVOR             i386_THREAD_STATE
623	>	#define SIGSEGV_THREAD_STATE_COUNT              i386_THREAD_STATE_COUNT
624	>	#define SIGSEGV_FAULT_INSTRUCTION               sip->thr_state.eip
625	>	#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
626	>	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&sip->thr_state.eax) /* EAX is the first GPR we consider */
627		#endif
628	+	#ifdef __x86_64__
629	+	#define SIGSEGV_EXCEPTION_STATE_TYPE    struct x86_exception_state64
630	+	#define SIGSEGV_EXCEPTION_STATE_FLAVOR  x86_EXCEPTION_STATE64
631	+	#define SIGSEGV_EXCEPTION_STATE_COUNT   x86_EXCEPTION_STATE64_COUNT
632	+	#define SIGSEGV_FAULT_ADDRESS                   sip->exc_state.faultvaddr
633	+	#define SIGSEGV_THREAD_STATE_TYPE               struct x86_thread_state64
634	+	#define SIGSEGV_THREAD_STATE_FLAVOR             x86_THREAD_STATE64
635	+	#define SIGSEGV_THREAD_STATE_COUNT              x86_THREAD_STATE64_COUNT
636	+	#define SIGSEGV_FAULT_INSTRUCTION               sip->thr_state.rip
637	+	#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
638	+	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&sip->thr_state.rax) /* RAX is the first GPR we consider */
639	+	#endif
640	+	#define SIGSEGV_FAULT_ADDRESS_FAST              code[1]
641	+	#define SIGSEGV_FAULT_INSTRUCTION_FAST  SIGSEGV_INVALID_ADDRESS
642	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST   mach_port_t thread, exception_data_t code
643	+	#define SIGSEGV_FAULT_HANDLER_ARGS              thread, code
644
645		// Since there can only be one exception thread running at any time
646		// this is not a problem.
#	Line 577 | Line 695 | handleExceptions(void *priv)
695
696		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
697		// Decode and skip X86 instruction
698	<	#if (defined(i386) || defined(__i386__))
698	>	#if (defined(i386) || defined(__i386__)) || defined(__x86_64__)
699		#if defined(__linux__)
700		enum {
701	+	#if (defined(i386) || defined(__i386__))
702		X86_REG_EIP = 14,
703		X86_REG_EAX = 11,
704		X86_REG_ECX = 10,
#	Line 589 | Line 708 | enum {
708		X86_REG_EBP = 6,
709		X86_REG_ESI = 5,
710		X86_REG_EDI = 4
711	+	#endif
712	+	#if defined(__x86_64__)
713	+	X86_REG_R8  = 0,
714	+	X86_REG_R9  = 1,
715	+	X86_REG_R10 = 2,
716	+	X86_REG_R11 = 3,
717	+	X86_REG_R12 = 4,
718	+	X86_REG_R13 = 5,
719	+	X86_REG_R14 = 6,
720	+	X86_REG_R15 = 7,
721	+	X86_REG_EDI = 8,
722	+	X86_REG_ESI = 9,
723	+	X86_REG_EBP = 10,
724	+	X86_REG_EBX = 11,
725	+	X86_REG_EDX = 12,
726	+	X86_REG_EAX = 13,
727	+	X86_REG_ECX = 14,
728	+	X86_REG_ESP = 15,
729	+	X86_REG_EIP = 16
730	+	#endif
731	+	};
732	+	#endif
733	+	#if defined(__NetBSD__)
734	+	enum {
735	+	#if (defined(i386) || defined(__i386__))
736	+	X86_REG_EIP = _REG_EIP,
737	+	X86_REG_EAX = _REG_EAX,
738	+	X86_REG_ECX = _REG_ECX,
739	+	X86_REG_EDX = _REG_EDX,
740	+	X86_REG_EBX = _REG_EBX,
741	+	X86_REG_ESP = _REG_ESP,
742	+	X86_REG_EBP = _REG_EBP,
743	+	X86_REG_ESI = _REG_ESI,
744	+	X86_REG_EDI = _REG_EDI
745	+	#endif
746	+	};
747	+	#endif
748	+	#if defined(__FreeBSD__)
749	+	enum {
750	+	#if (defined(i386) || defined(__i386__))
751	+	X86_REG_EIP = 10,
752	+	X86_REG_EAX = 7,
753	+	X86_REG_ECX = 6,
754	+	X86_REG_EDX = 5,
755	+	X86_REG_EBX = 4,
756	+	X86_REG_ESP = 13,
757	+	X86_REG_EBP = 2,
758	+	X86_REG_ESI = 1,
759	+	X86_REG_EDI = 0
760	+	#endif
761	+	};
762	+	#endif
763	+	#if defined(__OpenBSD__)
764	+	enum {
765	+	#if defined(__i386__)
766	+	// EDI is the first register we consider
767	+	#define OREG(REG) offsetof(struct sigcontext, sc_##REG)
768	+	#define DREG(REG) ((OREG(REG) - OREG(edi)) / 4)
769	+	X86_REG_EIP = DREG(eip), // 7
770	+	X86_REG_EAX = DREG(eax), // 6
771	+	X86_REG_ECX = DREG(ecx), // 5
772	+	X86_REG_EDX = DREG(edx), // 4
773	+	X86_REG_EBX = DREG(ebx), // 3
774	+	X86_REG_ESP = DREG(esp), // 10
775	+	X86_REG_EBP = DREG(ebp), // 2
776	+	X86_REG_ESI = DREG(esi), // 1
777	+	X86_REG_EDI = DREG(edi)  // 0
778	+	#undef DREG
779	+	#undef OREG
780	+	#endif
781	+	};
782	+	#endif
783	+	#if defined(__sun__)
784	+	// Same as for Linux, need to check for x86-64
785	+	enum {
786	+	#if defined(__i386__)
787	+	X86_REG_EIP = EIP,
788	+	X86_REG_EAX = EAX,
789	+	X86_REG_ECX = ECX,
790	+	X86_REG_EDX = EDX,
791	+	X86_REG_EBX = EBX,
792	+	X86_REG_ESP = ESP,
793	+	X86_REG_EBP = EBP,
794	+	X86_REG_ESI = ESI,
795	+	X86_REG_EDI = EDI
796	+	#endif
797		};
798		#endif
799	<	#if defined(__NetBSD__) || defined(__FreeBSD__)
799	>	#if defined(__APPLE__) && defined(__MACH__)
800		enum {
801	+	#if (defined(i386) || defined(__i386__))
802	+	#ifdef i386_SAVED_STATE
803	+	// same as FreeBSD (in Open Darwin 8.0.1)
804		X86_REG_EIP = 10,
805		X86_REG_EAX = 7,
806		X86_REG_ECX = 6,
#	Line 602 | Line 810 | enum {
810		X86_REG_EBP = 2,
811		X86_REG_ESI = 1,
812		X86_REG_EDI = 0
813	+	#else
814	+	// new layout (MacOS X 10.4.4 for x86)
815	+	X86_REG_EIP = 10,
816	+	X86_REG_EAX = 0,
817	+	X86_REG_ECX = 2,
818	+	X86_REG_EDX = 3,
819	+	X86_REG_EBX = 1,
820	+	X86_REG_ESP = 7,
821	+	X86_REG_EBP = 6,
822	+	X86_REG_ESI = 5,
823	+	X86_REG_EDI = 4
824	+	#endif
825	+	#endif
826	+	#if defined(__x86_64__)
827	+	X86_REG_R8  = 8,
828	+	X86_REG_R9  = 9,
829	+	X86_REG_R10 = 10,
830	+	X86_REG_R11 = 11,
831	+	X86_REG_R12 = 12,
832	+	X86_REG_R13 = 13,
833	+	X86_REG_R14 = 14,
834	+	X86_REG_R15 = 15,
835	+	X86_REG_EDI = 4,
836	+	X86_REG_ESI = 5,
837	+	X86_REG_EBP = 6,
838	+	X86_REG_EBX = 1,
839	+	X86_REG_EDX = 3,
840	+	X86_REG_EAX = 0,
841	+	X86_REG_ECX = 2,
842	+	X86_REG_ESP = 7,
843	+	X86_REG_EIP = 16
844	+	#endif
845	+	};
846	+	#endif
847	+	#if defined(_WIN32)
848	+	enum {
849	+	#if (defined(i386) || defined(__i386__))
850	+	X86_REG_EIP = 7,
851	+	X86_REG_EAX = 5,
852	+	X86_REG_ECX = 4,
853	+	X86_REG_EDX = 3,
854	+	X86_REG_EBX = 2,
855	+	X86_REG_ESP = 10,
856	+	X86_REG_EBP = 6,
857	+	X86_REG_ESI = 1,
858	+	X86_REG_EDI = 0
859	+	#endif
860		};
861		#endif
862		// FIXME: this is partly redundant with the instruction decoding phase
#	Line 638 | Line 893 | static inline int ix86_step_over_modrm(u
893		return offset;
894		}
895
896	<	static bool ix86_skip_instruction(unsigned int * regs)
896	>	static bool ix86_skip_instruction(unsigned long * regs)
897		{
898		unsigned char * eip = (unsigned char *)regs[X86_REG_EIP];
899
900		if (eip == 0)
901		return false;
902	+	#ifdef _WIN32
903	+	if (IsBadCodePtr((FARPROC)eip))
904	+	return false;
905	+	#endif
906
907	+	enum instruction_type_t {
908	+	i_MOV,
909	+	i_ADD
910	+	};
911	+
912		transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
913		transfer_size_t transfer_size = SIZE_LONG;
914	+	instruction_type_t instruction_type = i_MOV;
915
916		int reg = -1;
917		int len = 0;
918	<
918	>
919	>	#if DEBUG
920	>	printf("IP: %p [%02x %02x %02x %02x...]\n",
921	>	eip, eip[0], eip[1], eip[2], eip[3]);
922	>	#endif
923	>
924		// Operand size prefix
925		if (*eip == 0x66) {
926		eip++;
#	Line 658 | Line 928 | static bool ix86_skip_instruction(unsign
928		transfer_size = SIZE_WORD;
929		}
930
931	+	// REX prefix
932	+	#if defined(__x86_64__)
933	+	struct rex_t {
934	+	unsigned char W;
935	+	unsigned char R;
936	+	unsigned char X;
937	+	unsigned char B;
938	+	};
939	+	rex_t rex = { 0, 0, 0, 0 };
940	+	bool has_rex = false;
941	+	if ((*eip & 0xf0) == 0x40) {
942	+	has_rex = true;
943	+	const unsigned char b = *eip;
944	+	rex.W = b & (1 << 3);
945	+	rex.R = b & (1 << 2);
946	+	rex.X = b & (1 << 1);
947	+	rex.B = b & (1 << 0);
948	+	#if DEBUG
949	+	printf("REX: %c,%c,%c,%c\n",
950	+	rex.W ? 'W' : '_',
951	+	rex.R ? 'R' : '_',
952	+	rex.X ? 'X' : '_',
953	+	rex.B ? 'B' : '_');
954	+	#endif
955	+	eip++;
956	+	len++;
957	+	if (rex.W)
958	+	transfer_size = SIZE_QUAD;
959	+	}
960	+	#else
961	+	const bool has_rex = false;
962	+	#endif
963	+
964		// Decode instruction
965	+	int op_len = 1;
966	+	int target_size = SIZE_UNKNOWN;
967		switch (eip[0]) {
968		case 0x0f:
969	+	target_size = transfer_size;
970		switch (eip[1]) {
971	+	case 0xbe: // MOVSX r32, r/m8
972		case 0xb6: // MOVZX r32, r/m8
973	+	transfer_size = SIZE_BYTE;
974	+	goto do_mov_extend;
975	+	case 0xbf: // MOVSX r32, r/m16
976		case 0xb7: // MOVZX r32, r/m16
977	<	switch (eip[2] & 0xc0) {
978	<	case 0x80:
979	<	reg = (eip[2] >> 3) & 7;
980	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
981	<	break;
672	<	case 0x40:
673	<	reg = (eip[2] >> 3) & 7;
674	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
675	<	break;
676	<	case 0x00:
677	<	reg = (eip[2] >> 3) & 7;
678	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
679	<	break;
977	>	transfer_size = SIZE_WORD;
978	>	goto do_mov_extend;
979	>	do_mov_extend:
980	>	op_len = 2;
981	>	goto do_transfer_load;
982		}
681	–	len += 3 + ix86_step_over_modrm(eip + 2);
983		break;
984	<	}
985	<	break;
984	>	#if defined(__x86_64__)
985	>	case 0x63: // MOVSXD r64, r/m32
986	>	if (has_rex && rex.W) {
987	>	transfer_size = SIZE_LONG;
988	>	target_size = SIZE_QUAD;
989	>	}
990	>	else if (transfer_size != SIZE_WORD) {
991	>	transfer_size = SIZE_LONG;
992	>	target_size = SIZE_QUAD;
993	>	}
994	>	goto do_transfer_load;
995	>	#endif
996	>	case 0x02: // ADD r8, r/m8
997	>	transfer_size = SIZE_BYTE;
998	>	case 0x03: // ADD r32, r/m32
999	>	instruction_type = i_ADD;
1000	>	goto do_transfer_load;
1001		case 0x8a: // MOV r8, r/m8
1002		transfer_size = SIZE_BYTE;
1003		case 0x8b: // MOV r32, r/m32 (or 16-bit operation)
1004	<	switch (eip[1] & 0xc0) {
1004	>	do_transfer_load:
1005	>	switch (eip[op_len] & 0xc0) {
1006		case 0x80:
1007	<	reg = (eip[1] >> 3) & 7;
1007	>	reg = (eip[op_len] >> 3) & 7;
1008		transfer_type = SIGSEGV_TRANSFER_LOAD;
1009		break;
1010		case 0x40:
1011	<	reg = (eip[1] >> 3) & 7;
1011	>	reg = (eip[op_len] >> 3) & 7;
1012		transfer_type = SIGSEGV_TRANSFER_LOAD;
1013		break;
1014		case 0x00:
1015	<	reg = (eip[1] >> 3) & 7;
1015	>	reg = (eip[op_len] >> 3) & 7;
1016		transfer_type = SIGSEGV_TRANSFER_LOAD;
1017		break;
1018		}
1019	<	len += 2 + ix86_step_over_modrm(eip + 1);
1019	>	len += 1 + op_len + ix86_step_over_modrm(eip + op_len);
1020		break;
1021	+	case 0x00: // ADD r/m8, r8
1022	+	transfer_size = SIZE_BYTE;
1023	+	case 0x01: // ADD r/m32, r32
1024	+	instruction_type = i_ADD;
1025	+	goto do_transfer_store;
1026		case 0x88: // MOV r/m8, r8
1027		transfer_size = SIZE_BYTE;
1028		case 0x89: // MOV r/m32, r32 (or 16-bit operation)
1029	<	switch (eip[1] & 0xc0) {
1029	>	do_transfer_store:
1030	>	switch (eip[op_len] & 0xc0) {
1031		case 0x80:
1032	<	reg = (eip[1] >> 3) & 7;
1032	>	reg = (eip[op_len] >> 3) & 7;
1033		transfer_type = SIGSEGV_TRANSFER_STORE;
1034		break;
1035		case 0x40:
1036	<	reg = (eip[1] >> 3) & 7;
1036	>	reg = (eip[op_len] >> 3) & 7;
1037		transfer_type = SIGSEGV_TRANSFER_STORE;
1038		break;
1039		case 0x00:
1040	<	reg = (eip[1] >> 3) & 7;
1040	>	reg = (eip[op_len] >> 3) & 7;
1041		transfer_type = SIGSEGV_TRANSFER_STORE;
1042		break;
1043		}
1044	<	len += 2 + ix86_step_over_modrm(eip + 1);
1044	>	len += 1 + op_len + ix86_step_over_modrm(eip + op_len);
1045		break;
1046		}
1047	+	if (target_size == SIZE_UNKNOWN)
1048	+	target_size = transfer_size;
1049
1050		if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1051		// Unknown machine code, let it crash. Then patch the decoder
1052		return false;
1053		}
1054
1055	<	if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
1056	<	static const int x86_reg_map[8] = {
1055	>	#if defined(__x86_64__)
1056	>	if (rex.R)
1057	>	reg += 8;
1058	>	#endif
1059	>
1060	>	if (instruction_type == i_MOV && transfer_type == SIGSEGV_TRANSFER_LOAD && reg != -1) {
1061	>	static const int x86_reg_map[] = {
1062		X86_REG_EAX, X86_REG_ECX, X86_REG_EDX, X86_REG_EBX,
1063	<	X86_REG_ESP, X86_REG_EBP, X86_REG_ESI, X86_REG_EDI
1063	>	X86_REG_ESP, X86_REG_EBP, X86_REG_ESI, X86_REG_EDI,
1064	>	#if defined(__x86_64__)
1065	>	X86_REG_R8,  X86_REG_R9,  X86_REG_R10, X86_REG_R11,
1066	>	X86_REG_R12, X86_REG_R13, X86_REG_R14, X86_REG_R15,
1067	>	#endif
1068		};
1069
1070	<	if (reg < 0 || reg >= 8)
1070	>	if (reg < 0 || reg >= (sizeof(x86_reg_map)/sizeof(x86_reg_map[0]) - 1))
1071		return false;
1072
1073	+	// Set 0 to the relevant register part
1074	+	// NOTE: this is only valid for MOV alike instructions
1075		int rloc = x86_reg_map[reg];
1076	<	switch (transfer_size) {
1076	>	switch (target_size) {
1077		case SIZE_BYTE:
1078	<	regs[rloc] = (regs[rloc] & ~0xff);
1078	>	if (has_rex || reg < 4)
1079	>	regs[rloc] = (regs[rloc] & ~0x00ffL);
1080	>	else {
1081	>	rloc = x86_reg_map[reg - 4];
1082	>	regs[rloc] = (regs[rloc] & ~0xff00L);
1083	>	}
1084		break;
1085		case SIZE_WORD:
1086	<	regs[rloc] = (regs[rloc] & ~0xffff);
1086	>	regs[rloc] = (regs[rloc] & ~0xffffL);
1087		break;
1088		case SIZE_LONG:
1089	+	case SIZE_QUAD: // zero-extension
1090		regs[rloc] = 0;
1091		break;
1092		}
1093		}
1094
1095		#if DEBUG
1096	<	printf("%08x: %s %s access", regs[X86_REG_EIP],
1097	<	transfer_size == SIZE_BYTE ? "byte" : transfer_size == SIZE_WORD ? "word" : "long",
1096	>	printf("%p: %s %s access", (void *)regs[X86_REG_EIP],
1097	>	transfer_size == SIZE_BYTE ? "byte" :
1098	>	transfer_size == SIZE_WORD ? "word" :
1099	>	transfer_size == SIZE_LONG ? "long" :
1100	>	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1101		transfer_type == SIGSEGV_TRANSFER_LOAD ? "read" : "write");
1102
1103		if (reg != -1) {
1104	<	static const char * x86_reg_str_map[8] = {
1105	<	"eax", "ecx", "edx", "ebx",
1106	<	"esp", "ebp", "esi", "edi"
1104	>	static const char * x86_byte_reg_str_map[] = {
1105	>	"al",   "cl",   "dl",   "bl",
1106	>	"spl",  "bpl",  "sil",  "dil",
1107	>	"r8b",  "r9b",  "r10b", "r11b",
1108	>	"r12b", "r13b", "r14b", "r15b",
1109	>	"ah",   "ch",   "dh",   "bh",
1110	>	};
1111	>	static const char * x86_word_reg_str_map[] = {
1112	>	"ax",   "cx",   "dx",   "bx",
1113	>	"sp",   "bp",   "si",   "di",
1114	>	"r8w",  "r9w",  "r10w", "r11w",
1115	>	"r12w", "r13w", "r14w", "r15w",
1116	>	};
1117	>	static const char *x86_long_reg_str_map[] = {
1118	>	"eax",  "ecx",  "edx",  "ebx",
1119	>	"esp",  "ebp",  "esi",  "edi",
1120	>	"r8d",  "r9d",  "r10d", "r11d",
1121	>	"r12d", "r13d", "r14d", "r15d",
1122		};
1123	<	printf(" %s register %%%s", transfer_type == SIGSEGV_TRANSFER_LOAD ? "to" : "from", x86_reg_str_map[reg]);
1123	>	static const char *x86_quad_reg_str_map[] = {
1124	>	"rax", "rcx", "rdx", "rbx",
1125	>	"rsp", "rbp", "rsi", "rdi",
1126	>	"r8",  "r9",  "r10", "r11",
1127	>	"r12", "r13", "r14", "r15",
1128	>	};
1129	>	const char * reg_str = NULL;
1130	>	switch (target_size) {
1131	>	case SIZE_BYTE:
1132	>	reg_str = x86_byte_reg_str_map[(!has_rex && reg >= 4 ? 12 : 0) + reg];
1133	>	break;
1134	>	case SIZE_WORD: reg_str = x86_word_reg_str_map[reg]; break;
1135	>	case SIZE_LONG: reg_str = x86_long_reg_str_map[reg]; break;
1136	>	case SIZE_QUAD: reg_str = x86_quad_reg_str_map[reg]; break;
1137	>	}
1138	>	if (reg_str)
1139	>	printf(" %s register %%%s",
1140	>	transfer_type == SIGSEGV_TRANSFER_LOAD ? "to" : "from",
1141	>	reg_str);
1142		}
1143		printf(", %d bytes instruction\n", len);
1144		#endif
#	Line 772 | Line 1150 | static bool ix86_skip_instruction(unsign
1150
1151		// Decode and skip PPC instruction
1152		#if (defined(powerpc) || defined(__powerpc__) || defined(__ppc__))
1153	<	static bool powerpc_skip_instruction(unsigned int * nip_p, unsigned int * regs)
1153	>	static bool powerpc_skip_instruction(unsigned long * nip_p, unsigned long * regs)
1154		{
1155		instruction_t instr;
1156		powerpc_decode_instruction(&instr, *nip_p, regs);
#	Line 784 | Line 1162 | static bool powerpc_skip_instruction(uns
1162
1163		#if DEBUG
1164		printf("%08x: %s %s access", *nip_p,
1165	<	instr.transfer_size == SIZE_BYTE ? "byte" : instr.transfer_size == SIZE_WORD ? "word" : "long",
1165	>	instr.transfer_size == SIZE_BYTE ? "byte" :
1166	>	instr.transfer_size == SIZE_WORD ? "word" :
1167	>	instr.transfer_size == SIZE_LONG ? "long" : "quad",
1168		instr.transfer_type == SIGSEGV_TRANSFER_LOAD ? "read" : "write");
1169
1170		if (instr.addr_mode == MODE_U || instr.addr_mode == MODE_UX)
#	Line 802 | Line 1182 | static bool powerpc_skip_instruction(uns
1182		return true;
1183		}
1184		#endif
1185	+
1186	+	// Decode and skip MIPS instruction
1187	+	#if (defined(mips) || defined(__mips))
1188	+	static bool mips_skip_instruction(greg_t * pc_p, greg_t * regs)
1189	+	{
1190	+	unsigned int * epc = (unsigned int *)(unsigned long)*pc_p;
1191	+
1192	+	if (epc == 0)
1193	+	return false;
1194	+
1195	+	#if DEBUG
1196	+	printf("IP: %p [%08x]\n", epc, epc[0]);
1197		#endif
1198
1199	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1200	+	transfer_size_t transfer_size = SIZE_LONG;
1201	+	int direction = 0;
1202	+
1203	+	const unsigned int opcode = epc[0];
1204	+	switch (opcode >> 26) {
1205	+	case 32: // Load Byte
1206	+	case 36: // Load Byte Unsigned
1207	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1208	+	transfer_size = SIZE_BYTE;
1209	+	break;
1210	+	case 33: // Load Halfword
1211	+	case 37: // Load Halfword Unsigned
1212	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1213	+	transfer_size = SIZE_WORD;
1214	+	break;
1215	+	case 35: // Load Word
1216	+	case 39: // Load Word Unsigned
1217	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1218	+	transfer_size = SIZE_LONG;
1219	+	break;
1220	+	case 34: // Load Word Left
1221	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1222	+	transfer_size = SIZE_LONG;
1223	+	direction = -1;
1224	+	break;
1225	+	case 38: // Load Word Right
1226	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1227	+	transfer_size = SIZE_LONG;
1228	+	direction = 1;
1229	+	break;
1230	+	case 55: // Load Doubleword
1231	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1232	+	transfer_size = SIZE_QUAD;
1233	+	break;
1234	+	case 26: // Load Doubleword Left
1235	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1236	+	transfer_size = SIZE_QUAD;
1237	+	direction = -1;
1238	+	break;
1239	+	case 27: // Load Doubleword Right
1240	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1241	+	transfer_size = SIZE_QUAD;
1242	+	direction = 1;
1243	+	break;
1244	+	case 40: // Store Byte
1245	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1246	+	transfer_size = SIZE_BYTE;
1247	+	break;
1248	+	case 41: // Store Halfword
1249	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1250	+	transfer_size = SIZE_WORD;
1251	+	break;
1252	+	case 43: // Store Word
1253	+	case 42: // Store Word Left
1254	+	case 46: // Store Word Right
1255	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1256	+	transfer_size = SIZE_LONG;
1257	+	break;
1258	+	case 63: // Store Doubleword
1259	+	case 44: // Store Doubleword Left
1260	+	case 45: // Store Doubleword Right
1261	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1262	+	transfer_size = SIZE_QUAD;
1263	+	break;
1264	+	/* Misc instructions unlikely to be used within CPU emulators */
1265	+	case 48: // Load Linked Word
1266	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1267	+	transfer_size = SIZE_LONG;
1268	+	break;
1269	+	case 52: // Load Linked Doubleword
1270	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1271	+	transfer_size = SIZE_QUAD;
1272	+	break;
1273	+	case 56: // Store Conditional Word
1274	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1275	+	transfer_size = SIZE_LONG;
1276	+	break;
1277	+	case 60: // Store Conditional Doubleword
1278	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1279	+	transfer_size = SIZE_QUAD;
1280	+	break;
1281	+	}
1282	+
1283	+	if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1284	+	// Unknown machine code, let it crash. Then patch the decoder
1285	+	return false;
1286	+	}
1287	+
1288	+	// Zero target register in case of a load operation
1289	+	const int reg = (opcode >> 16) & 0x1f;
1290	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD) {
1291	+	if (direction == 0)
1292	+	regs[reg] = 0;
1293	+	else {
1294	+	// FIXME: untested code
1295	+	unsigned long ea = regs[(opcode >> 21) & 0x1f];
1296	+	ea += (signed long)(signed int)(signed short)(opcode & 0xffff);
1297	+	const int offset = ea & (transfer_size == SIZE_LONG ? 3 : 7);
1298	+	unsigned long value;
1299	+	if (direction > 0) {
1300	+	const unsigned long rmask = ~((1L << ((offset + 1) * 8)) - 1);
1301	+	value = regs[reg] & rmask;
1302	+	}
1303	+	else {
1304	+	const unsigned long lmask = (1L << (offset * 8)) - 1;
1305	+	value = regs[reg] & lmask;
1306	+	}
1307	+	// restore most significant bits
1308	+	if (transfer_size == SIZE_LONG)
1309	+	value = (signed long)(signed int)value;
1310	+	regs[reg] = value;
1311	+	}
1312	+	}
1313	+
1314	+	#if DEBUG
1315	+	#if (defined(_ABIN32) || defined(_ABI64))
1316	+	static const char * mips_gpr_names[32] = {
1317	+	"zero", "at",   "v0",   "v1",   "a0",   "a1",   "a2",   "a3",
1318	+	"t0",   "t1",   "t2",   "t3",   "t4",   "t5",   "t6",   "t7",
1319	+	"s0",   "s1",   "s2",   "s3",   "s4",   "s5",   "s6",   "s7",
1320	+	"t8",   "t9",   "k0",   "k1",   "gp",   "sp",   "s8",   "ra"
1321	+	};
1322	+	#else
1323	+	static const char * mips_gpr_names[32] = {
1324	+	"zero", "at",   "v0",   "v1",   "a0",   "a1",   "a2",   "a3",
1325	+	"a4",   "a5",   "a6",   "a7",   "t0",   "t1",   "t2",   "t3",
1326	+	"s0",   "s1",   "s2",   "s3",   "s4",   "s5",   "s6",   "s7",
1327	+	"t8",   "t9",   "k0",   "k1",   "gp",   "sp",   "s8",   "ra"
1328	+	};
1329	+	#endif
1330	+	printf("%s %s register %s\n",
1331	+	transfer_size == SIZE_BYTE ? "byte" :
1332	+	transfer_size == SIZE_WORD ? "word" :
1333	+	transfer_size == SIZE_LONG ? "long" :
1334	+	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1335	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1336	+	mips_gpr_names[reg]);
1337	+	#endif
1338	+
1339	+	*pc_p += 4;
1340	+	return true;
1341	+	}
1342	+	#endif
1343	+
1344	+	// Decode and skip SPARC instruction
1345	+	#if (defined(sparc) || defined(__sparc__))
1346	+	enum {
1347	+	#if (defined(__sun__))
1348	+	SPARC_REG_G1 = REG_G1,
1349	+	SPARC_REG_O0 = REG_O0,
1350	+	SPARC_REG_PC = REG_PC,
1351	+	SPARC_REG_nPC = REG_nPC
1352	+	#endif
1353	+	};
1354	+	static bool sparc_skip_instruction(unsigned long * regs, gwindows_t * gwins, struct rwindow * rwin)
1355	+	{
1356	+	unsigned int * pc = (unsigned int *)regs[SPARC_REG_PC];
1357	+
1358	+	if (pc == 0)
1359	+	return false;
1360	+
1361	+	#if DEBUG
1362	+	printf("IP: %p [%08x]\n", pc, pc[0]);
1363	+	#endif
1364	+
1365	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1366	+	transfer_size_t transfer_size = SIZE_LONG;
1367	+	bool register_pair = false;
1368	+
1369	+	const unsigned int opcode = pc[0];
1370	+	if ((opcode >> 30) != 3)
1371	+	return false;
1372	+	switch ((opcode >> 19) & 0x3f) {
1373	+	case 9: // Load Signed Byte
1374	+	case 1: // Load Unsigned Byte
1375	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1376	+	transfer_size = SIZE_BYTE;
1377	+	break;
1378	+	case 10:// Load Signed Halfword
1379	+	case 2: // Load Unsigned Word
1380	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1381	+	transfer_size = SIZE_WORD;
1382	+	break;
1383	+	case 8: // Load Word
1384	+	case 0: // Load Unsigned Word
1385	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1386	+	transfer_size = SIZE_LONG;
1387	+	break;
1388	+	case 11:// Load Extended Word
1389	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1390	+	transfer_size = SIZE_QUAD;
1391	+	break;
1392	+	case 3: // Load Doubleword
1393	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1394	+	transfer_size = SIZE_LONG;
1395	+	register_pair = true;
1396	+	break;
1397	+	case 5: // Store Byte
1398	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1399	+	transfer_size = SIZE_BYTE;
1400	+	break;
1401	+	case 6: // Store Halfword
1402	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1403	+	transfer_size = SIZE_WORD;
1404	+	break;
1405	+	case 4: // Store Word
1406	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1407	+	transfer_size = SIZE_LONG;
1408	+	break;
1409	+	case 14:// Store Extended Word
1410	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1411	+	transfer_size = SIZE_QUAD;
1412	+	break;
1413	+	case 7: // Store Doubleword
1414	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1415	+	transfer_size = SIZE_LONG;
1416	+	register_pair = true;
1417	+	break;
1418	+	}
1419	+
1420	+	if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
1421	+	// Unknown machine code, let it crash. Then patch the decoder
1422	+	return false;
1423	+	}
1424	+
1425	+	const int reg = (opcode >> 25) & 0x1f;
1426	+
1427	+	#if DEBUG
1428	+	static const char * reg_names[] = {
1429	+	"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
1430	+	"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
1431	+	"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
1432	+	"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7"
1433	+	};
1434	+	printf("%s %s register %s\n",
1435	+	transfer_size == SIZE_BYTE ? "byte" :
1436	+	transfer_size == SIZE_WORD ? "word" :
1437	+	transfer_size == SIZE_LONG ? "long" :
1438	+	transfer_size == SIZE_QUAD ? "quad" : "unknown",
1439	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1440	+	reg_names[reg]);
1441	+	#endif
1442	+
1443	+	// Zero target register in case of a load operation
1444	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD && reg != 0) {
1445	+	// FIXME: code to handle local & input registers is not tested
1446	+	if (reg >= 1 && reg < 8) {
1447	+	// global registers
1448	+	regs[reg - 1 + SPARC_REG_G1] = 0;
1449	+	}
1450	+	else if (reg >= 8 && reg < 16) {
1451	+	// output registers
1452	+	regs[reg - 8 + SPARC_REG_O0] = 0;
1453	+	}
1454	+	else if (reg >= 16 && reg < 24) {
1455	+	// local registers (in register windows)
1456	+	if (gwins)
1457	+	gwins->wbuf->rw_local[reg - 16] = 0;
1458	+	else
1459	+	rwin->rw_local[reg - 16] = 0;
1460	+	}
1461	+	else {
1462	+	// input registers (in register windows)
1463	+	if (gwins)
1464	+	gwins->wbuf->rw_in[reg - 24] = 0;
1465	+	else
1466	+	rwin->rw_in[reg - 24] = 0;
1467	+	}
1468	+	}
1469	+
1470	+	regs[SPARC_REG_PC] += 4;
1471	+	regs[SPARC_REG_nPC] += 4;
1472	+	return true;
1473	+	}
1474	+	#endif
1475	+	#endif
1476	+
1477	+	// Decode and skip ARM instruction
1478	+	#if (defined(arm) || defined(__arm__))
1479	+	enum {
1480	+	#if (defined(__linux__))
1481	+	ARM_REG_PC = 15,
1482	+	ARM_REG_CPSR = 16
1483	+	#endif
1484	+	};
1485	+	static bool arm_skip_instruction(unsigned long * regs)
1486	+	{
1487	+	unsigned int * pc = (unsigned int *)regs[ARM_REG_PC];
1488	+
1489	+	if (pc == 0)
1490	+	return false;
1491	+
1492	+	#if DEBUG
1493	+	printf("IP: %p [%08x]\n", pc, pc[0]);
1494	+	#endif
1495	+
1496	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1497	+	transfer_size_t transfer_size = SIZE_UNKNOWN;
1498	+	enum { op_sdt = 1, op_sdth = 2 };
1499	+	int op = 0;
1500	+
1501	+	// Handle load/store instructions only
1502	+	const unsigned int opcode = pc[0];
1503	+	switch ((opcode >> 25) & 7) {
1504	+	case 0: // Halfword and Signed Data Transfer (LDRH, STRH, LDRSB, LDRSH)
1505	+	op = op_sdth;
1506	+	// Determine transfer size (S/H bits)
1507	+	switch ((opcode >> 5) & 3) {
1508	+	case 0: // SWP instruction
1509	+	break;
1510	+	case 1: // Unsigned halfwords
1511	+	case 3: // Signed halfwords
1512	+	transfer_size = SIZE_WORD;
1513	+	break;
1514	+	case 2: // Signed byte
1515	+	transfer_size = SIZE_BYTE;
1516	+	break;
1517	+	}
1518	+	break;
1519	+	case 2:
1520	+	case 3: // Single Data Transfer (LDR, STR)
1521	+	op = op_sdt;
1522	+	// Determine transfer size (B bit)
1523	+	if (((opcode >> 22) & 1) == 1)
1524	+	transfer_size = SIZE_BYTE;
1525	+	else
1526	+	transfer_size = SIZE_LONG;
1527	+	break;
1528	+	default:
1529	+	// FIXME: support load/store mutliple?
1530	+	return false;
1531	+	}
1532	+
1533	+	// Check for invalid transfer size (SWP instruction?)
1534	+	if (transfer_size == SIZE_UNKNOWN)
1535	+	return false;
1536	+
1537	+	// Determine transfer type (L bit)
1538	+	if (((opcode >> 20) & 1) == 1)
1539	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1540	+	else
1541	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1542	+
1543	+	// Compute offset
1544	+	int offset;
1545	+	if (((opcode >> 25) & 1) == 0) {
1546	+	if (op == op_sdt)
1547	+	offset = opcode & 0xfff;
1548	+	else if (op == op_sdth) {
1549	+	int rm = opcode & 0xf;
1550	+	if (((opcode >> 22) & 1) == 0) {
1551	+	// register offset
1552	+	offset = regs[rm];
1553	+	}
1554	+	else {
1555	+	// immediate offset
1556	+	offset = ((opcode >> 4) & 0xf0) | (opcode & 0x0f);
1557	+	}
1558	+	}
1559	+	}
1560	+	else {
1561	+	const int rm = opcode & 0xf;
1562	+	const int sh = (opcode >> 7) & 0x1f;
1563	+	if (((opcode >> 4) & 1) == 1) {
1564	+	// we expect only legal load/store instructions
1565	+	printf("FATAL: invalid shift operand\n");
1566	+	return false;
1567	+	}
1568	+	const unsigned int v = regs[rm];
1569	+	switch ((opcode >> 5) & 3) {
1570	+	case 0: // logical shift left
1571	+	offset = sh ? v << sh : v;
1572	+	break;
1573	+	case 1: // logical shift right
1574	+	offset = sh ? v >> sh : 0;
1575	+	break;
1576	+	case 2: // arithmetic shift right
1577	+	if (sh)
1578	+	offset = ((signed int)v) >> sh;
1579	+	else
1580	+	offset = (v & 0x80000000) ? 0xffffffff : 0;
1581	+	break;
1582	+	case 3: // rotate right
1583	+	if (sh)
1584	+	offset = (v >> sh) | (v << (32 - sh));
1585	+	else
1586	+	offset = (v >> 1) | ((regs[ARM_REG_CPSR] << 2) & 0x80000000);
1587	+	break;
1588	+	}
1589	+	}
1590	+	if (((opcode >> 23) & 1) == 0)
1591	+	offset = -offset;
1592	+
1593	+	int rd = (opcode >> 12) & 0xf;
1594	+	int rn = (opcode >> 16) & 0xf;
1595	+	#if DEBUG
1596	+	static const char * reg_names[] = {
1597	+	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
1598	+	"r9", "r9", "sl", "fp", "ip", "sp", "lr", "pc"
1599	+	};
1600	+	printf("%s %s register %s\n",
1601	+	transfer_size == SIZE_BYTE ? "byte" :
1602	+	transfer_size == SIZE_WORD ? "word" :
1603	+	transfer_size == SIZE_LONG ? "long" : "unknown",
1604	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1605	+	reg_names[rd]);
1606	+	#endif
1607	+
1608	+	unsigned int base = regs[rn];
1609	+	if (((opcode >> 24) & 1) == 1)
1610	+	base += offset;
1611	+
1612	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD)
1613	+	regs[rd] = 0;
1614	+
1615	+	if (((opcode >> 24) & 1) == 0)                // post-index addressing
1616	+	regs[rn] += offset;
1617	+	else if (((opcode >> 21) & 1) == 1)   // write-back address into base
1618	+	regs[rn] = base;
1619	+
1620	+	regs[ARM_REG_PC] += 4;
1621	+	return true;
1622	+	}
1623	+	#endif
1624	+
1625	+
1626		// Fallbacks
1627	+	#ifndef SIGSEGV_FAULT_ADDRESS_FAST
1628	+	#define SIGSEGV_FAULT_ADDRESS_FAST              SIGSEGV_FAULT_ADDRESS
1629	+	#endif
1630	+	#ifndef SIGSEGV_FAULT_INSTRUCTION_FAST
1631	+	#define SIGSEGV_FAULT_INSTRUCTION_FAST  SIGSEGV_FAULT_INSTRUCTION
1632	+	#endif
1633		#ifndef SIGSEGV_FAULT_INSTRUCTION
1634	<	#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_INVALID_PC
1634	>	#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_INVALID_ADDRESS
1635		#endif
1636		#ifndef SIGSEGV_FAULT_HANDLER_ARGLIST_1
1637		#define SIGSEGV_FAULT_HANDLER_ARGLIST_1 SIGSEGV_FAULT_HANDLER_ARGLIST
1638		#endif
1639		#ifndef SIGSEGV_FAULT_HANDLER_INVOKE
1640	<	#define SIGSEGV_FAULT_HANDLER_INVOKE(ADDR, IP)  sigsegv_fault_handler(ADDR, IP)
1640	>	#define SIGSEGV_FAULT_HANDLER_INVOKE(P) sigsegv_fault_handler(P)
1641		#endif
1642
1643		// SIGSEGV recovery supported ?
#	Line 825 | Line 1650 | static bool powerpc_skip_instruction(uns
1650		*  SIGSEGV global handler
1651		*/
1652
1653	<	#if defined(HAVE_SIGSEGV_RECOVERY) || defined(HAVE_MACH_EXCEPTIONS)
1653	>	struct sigsegv_info_t {
1654	>	sigsegv_address_t addr;
1655	>	sigsegv_address_t pc;
1656	>	#ifdef HAVE_MACH_EXCEPTIONS
1657	>	mach_port_t thread;
1658	>	bool has_exc_state;
1659	>	SIGSEGV_EXCEPTION_STATE_TYPE exc_state;
1660	>	mach_msg_type_number_t exc_state_count;
1661	>	bool has_thr_state;
1662	>	SIGSEGV_THREAD_STATE_TYPE thr_state;
1663	>	mach_msg_type_number_t thr_state_count;
1664	>	#endif
1665	>	};
1666	>
1667	>	// Return the address of the invalid memory reference
1668	>	sigsegv_address_t sigsegv_get_fault_address(sigsegv_info_t *sip)
1669	>	{
1670	>	#ifdef HAVE_MACH_EXCEPTIONS
1671	>	static int use_fast_path = -1;
1672	>	if (use_fast_path != 1 && !sip->has_exc_state) {
1673	>	sip->exc_state_count = SIGSEGV_EXCEPTION_STATE_COUNT;
1674	>	kern_return_t krc = thread_get_state(sip->thread,
1675	>	SIGSEGV_EXCEPTION_STATE_FLAVOR,
1676	>	(natural_t *)&sip->exc_state,
1677	>	&sip->exc_state_count);
1678	>	MACH_CHECK_ERROR(thread_get_state, krc);
1679	>	sip->has_exc_state = true;
1680	>
1681	>	sigsegv_address_t addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
1682	>	if (use_fast_path < 0)
1683	>	use_fast_path = addr == sip->addr;
1684	>	sip->addr = addr;
1685	>	}
1686	>	#endif
1687	>	return sip->addr;
1688	>	}
1689	>
1690	>	// Return the address of the instruction that caused the fault, or
1691	>	// SIGSEGV_INVALID_ADDRESS if we could not retrieve this information
1692	>	sigsegv_address_t sigsegv_get_fault_instruction_address(sigsegv_info_t *sip)
1693	>	{
1694	>	#ifdef HAVE_MACH_EXCEPTIONS
1695	>	if (!sip->has_thr_state) {
1696	>	sip->thr_state_count = SIGSEGV_THREAD_STATE_COUNT;
1697	>	kern_return_t krc = thread_get_state(sip->thread,
1698	>	SIGSEGV_THREAD_STATE_FLAVOR,
1699	>	(natural_t *)&sip->thr_state,
1700	>	&sip->thr_state_count);
1701	>	MACH_CHECK_ERROR(thread_get_state, krc);
1702	>	sip->has_thr_state = true;
1703	>
1704	>	sip->pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
1705	>	}
1706	>	#endif
1707	>	return sip->pc;
1708	>	}
1709	>
1710		// This function handles the badaccess to memory.
1711		// It is called from the signal handler or the exception handler.
1712		static bool handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGLIST_1)
1713		{
1714	<	sigsegv_address_t fault_address = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
1715	<	sigsegv_address_t fault_instruction = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
1716	<
1714	>	sigsegv_info_t si;
1715	>	si.addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS_FAST;
1716	>	si.pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION_FAST;
1717	>	#ifdef HAVE_MACH_EXCEPTIONS
1718	>	si.thread = thread;
1719	>	si.has_exc_state = false;
1720	>	si.has_thr_state = false;
1721	>	#endif
1722	>	sigsegv_info_t * const sip = &si;
1723	>
1724		// Call user's handler and reinstall the global handler, if required
1725	<	switch (SIGSEGV_FAULT_HANDLER_INVOKE(fault_address, fault_instruction)) {
1725	>	switch (SIGSEGV_FAULT_HANDLER_INVOKE(sip)) {
1726		case SIGSEGV_RETURN_SUCCESS:
1727		return true;
1728
#	Line 848 | Line 1736 | static bool handle_badaccess(SIGSEGV_FAU
1736		// is modified off of the stack, in Mach we
1737		// need to actually call thread_set_state to
1738		// have the register values updated.
1739	<	kern_return_t krc;
1740	<
1741	<	krc = thread_set_state(thread,
1742	<	MACHINE_THREAD_STATE, (thread_state_t)state,
1743	<	MACHINE_THREAD_STATE_COUNT);
856	<	MACH_CHECK_ERROR (thread_get_state, krc);
1739	>	kern_return_t krc = thread_set_state(sip->thread,
1740	>	SIGSEGV_THREAD_STATE_FLAVOR,
1741	>	(natural_t *)&sip->thr_state,
1742	>	sip->thr_state_count);
1743	>	MACH_CHECK_ERROR(thread_set_state, krc);
1744		#endif
1745		return true;
1746		}
1747		break;
1748		#endif
1749	+	case SIGSEGV_RETURN_FAILURE:
1750	+	// We can't do anything with the fault_address, dump state?
1751	+	if (sigsegv_state_dumper != 0)
1752	+	sigsegv_state_dumper(sip);
1753	+	break;
1754		}
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);
1755
1756		return false;
1757		}
870	–	#endif
1758
1759
1760		/*
#	Line 904 | Line 1791 | forward_exception(mach_port_t thread_por
1791		mach_port_t port;
1792		exception_behavior_t behavior;
1793		thread_state_flavor_t flavor;
1794	<	thread_state_t thread_state;
1794	>	thread_state_data_t thread_state;
1795		mach_msg_type_number_t thread_state_count;
1796
1797		for (portIndex = 0; portIndex < oldExceptionPorts->maskCount; portIndex++) {
#	Line 923 | Line 1810 | forward_exception(mach_port_t thread_por
1810		behavior = oldExceptionPorts->behaviors[portIndex];
1811		flavor = oldExceptionPorts->flavors[portIndex];
1812
1813	+	if (!VALID_THREAD_STATE_FLAVOR(flavor)) {
1814	+	fprintf(stderr, "Invalid thread_state flavor = %d. Not forwarding\n", flavor);
1815	+	return KERN_FAILURE;
1816	+	}
1817	+
1818		/*
1819		fprintf(stderr, "forwarding exception, port = 0x%x, behaviour = %d, flavor = %d\n", port, behavior, flavor);
1820		*/
1821
1822		if (behavior != EXCEPTION_DEFAULT) {
1823		thread_state_count = THREAD_STATE_MAX;
1824	<	kret = thread_get_state (thread_port, flavor, thread_state,
1824	>	kret = thread_get_state (thread_port, flavor, (natural_t *)&thread_state,
1825		&thread_state_count);
1826		MACH_CHECK_ERROR (thread_get_state, kret);
1827		}
#	Line 945 | Line 1837 | forward_exception(mach_port_t thread_por
1837		// fprintf(stderr, "forwarding to exception_raise_state\n");
1838		kret = exception_raise_state(port, exception_type, exception_data,
1839		data_count, &flavor,
1840	<	thread_state, thread_state_count,
1841	<	thread_state, &thread_state_count);
1840	>	(natural_t *)&thread_state, thread_state_count,
1841	>	(natural_t *)&thread_state, &thread_state_count);
1842		MACH_CHECK_ERROR (exception_raise_state, kret);
1843		break;
1844		case EXCEPTION_STATE_IDENTITY:
#	Line 954 | Line 1846 | forward_exception(mach_port_t thread_por
1846		kret = exception_raise_state_identity(port, thread_port, task_port,
1847		exception_type, exception_data,
1848		data_count, &flavor,
1849	<	thread_state, thread_state_count,
1850	<	thread_state, &thread_state_count);
1849	>	(natural_t *)&thread_state, thread_state_count,
1850	>	(natural_t *)&thread_state, &thread_state_count);
1851		MACH_CHECK_ERROR (exception_raise_state_identity, kret);
1852		break;
1853		default:
1854		fprintf(stderr, "forward_exception got unknown behavior\n");
1855	+	kret = KERN_FAILURE;
1856		break;
1857		}
1858
1859		if (behavior != EXCEPTION_DEFAULT) {
1860	<	kret = thread_set_state (thread_port, flavor, thread_state,
1860	>	kret = thread_set_state (thread_port, flavor, (natural_t *)&thread_state,
1861		thread_state_count);
1862		MACH_CHECK_ERROR (thread_set_state, kret);
1863		}
1864
1865	<	return KERN_SUCCESS;
1865	>	return kret;
1866		}
1867
1868		/*
#	Line 997 | Line 1890 | catch_exception_raise(mach_port_t except
1890		mach_port_t task,
1891		exception_type_t exception,
1892		exception_data_t code,
1893	<	mach_msg_type_number_t codeCount)
1893	>	mach_msg_type_number_t code_count)
1894		{
1002	–	ppc_thread_state_t state;
1895		kern_return_t krc;
1896
1897	<	if ((exception == EXC_BAD_ACCESS)  && (codeCount >= 2)) {
1898	<	if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
1899	<	return KERN_SUCCESS;
1897	>	if (exception == EXC_BAD_ACCESS) {
1898	>	switch (code[0]) {
1899	>	case KERN_PROTECTION_FAILURE:
1900	>	case KERN_INVALID_ADDRESS:
1901	>	if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
1902	>	return KERN_SUCCESS;
1903	>	break;
1904	>	}
1905		}
1906
1907		// In Mach we do not need to remove the exception handler.
1908		// If we forward the exception, eventually some exception handler
1909		// will take care of this exception.
1910	<	krc = forward_exception(thread, task, exception, code, codeCount, &ports);
1910	>	krc = forward_exception(thread, task, exception, code, code_count, &ports);
1911
1912		return krc;
1913		}
#	Line 1138 | Line 2035 | static bool sigsegv_do_install_handler(s
2035		// addressing modes) used in PPC instructions, you will need the
2036		// GPR state anyway.
2037		krc = thread_set_exception_ports(mach_thread_self(), EXC_MASK_BAD_ACCESS, _exceptionPort,
2038	<	EXCEPTION_DEFAULT, MACHINE_THREAD_STATE);
2038	>	EXCEPTION_DEFAULT, SIGSEGV_THREAD_STATE_FLAVOR);
2039		if (krc != KERN_SUCCESS) {
2040		mach_error("thread_set_exception_ports", krc);
2041		return false;
#	Line 1161 | Line 2058 | static bool sigsegv_do_install_handler(s
2058		}
2059		#endif
2060
2061	+	#ifdef HAVE_WIN32_EXCEPTIONS
2062	+	static LONG WINAPI main_exception_filter(EXCEPTION_POINTERS *ExceptionInfo)
2063	+	{
2064	+	if (sigsegv_fault_handler != NULL
2065	+	&& ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION
2066	+	&& ExceptionInfo->ExceptionRecord->NumberParameters == 2
2067	+	&& handle_badaccess(ExceptionInfo))
2068	+	return EXCEPTION_CONTINUE_EXECUTION;
2069	+
2070	+	return EXCEPTION_CONTINUE_SEARCH;
2071	+	}
2072	+
2073	+	#if defined __CYGWIN__ && defined __i386__
2074	+	/* In Cygwin programs, SetUnhandledExceptionFilter has no effect because Cygwin
2075	+	installs a global exception handler.  We have to dig deep in order to install
2076	+	our main_exception_filter.  */
2077	+
2078	+	/* Data structures for the current thread's exception handler chain.
2079	+	On the x86 Windows uses register fs, offset 0 to point to the current
2080	+	exception handler; Cygwin mucks with it, so we must do the same... :-/ */
2081	+
2082	+	/* Magic taken from winsup/cygwin/include/exceptions.h.  */
2083	+
2084	+	struct exception_list {
2085	+	struct exception_list *prev;
2086	+	int (*handler) (EXCEPTION_RECORD *, void *, CONTEXT *, void *);
2087	+	};
2088	+	typedef struct exception_list exception_list;
2089	+
2090	+	/* Magic taken from winsup/cygwin/exceptions.cc.  */
2091	+
2092	+	__asm__ (".equ __except_list,0");
2093	+
2094	+	extern exception_list *_except_list __asm__ ("%fs:__except_list");
2095	+
2096	+	/* For debugging.  _except_list is not otherwise accessible from gdb.  */
2097	+	static exception_list *
2098	+	debug_get_except_list ()
2099	+	{
2100	+	return _except_list;
2101	+	}
2102	+
2103	+	/* Cygwin's original exception handler.  */
2104	+	static int (*cygwin_exception_handler) (EXCEPTION_RECORD *, void *, CONTEXT *, void *);
2105	+
2106	+	/* Our exception handler.  */
2107	+	static int
2108	+	libsigsegv_exception_handler (EXCEPTION_RECORD *exception, void *frame, CONTEXT *context, void *dispatch)
2109	+	{
2110	+	EXCEPTION_POINTERS ExceptionInfo;
2111	+	ExceptionInfo.ExceptionRecord = exception;
2112	+	ExceptionInfo.ContextRecord = context;
2113	+	if (main_exception_filter (&ExceptionInfo) == EXCEPTION_CONTINUE_SEARCH)
2114	+	return cygwin_exception_handler (exception, frame, context, dispatch);
2115	+	else
2116	+	return 0;
2117	+	}
2118	+
2119	+	static void
2120	+	do_install_main_exception_filter ()
2121	+	{
2122	+	/* We cannot insert any handler into the chain, because such handlers
2123	+	must lie on the stack (?).  Instead, we have to replace(!) Cygwin's
2124	+	global exception handler.  */
2125	+	cygwin_exception_handler = _except_list->handler;
2126	+	_except_list->handler = libsigsegv_exception_handler;
2127	+	}
2128	+
2129	+	#else
2130	+
2131	+	static void
2132	+	do_install_main_exception_filter ()
2133	+	{
2134	+	SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) &main_exception_filter);
2135	+	}
2136	+	#endif
2137	+
2138	+	static bool sigsegv_do_install_handler(sigsegv_fault_handler_t handler)
2139	+	{
2140	+	static bool main_exception_filter_installed = false;
2141	+	if (!main_exception_filter_installed) {
2142	+	do_install_main_exception_filter();
2143	+	main_exception_filter_installed = true;
2144	+	}
2145	+	sigsegv_fault_handler = handler;
2146	+	return true;
2147	+	}
2148	+	#endif
2149	+
2150		bool sigsegv_install_handler(sigsegv_fault_handler_t handler)
2151		{
2152		#if defined(HAVE_SIGSEGV_RECOVERY)
#	Line 1171 | Line 2157 | bool sigsegv_install_handler(sigsegv_fau
2157		if (success)
2158		sigsegv_fault_handler = handler;
2159		return success;
2160	<	#elif defined(HAVE_MACH_EXCEPTIONS)
2160	>	#elif defined(HAVE_MACH_EXCEPTIONS) || defined(HAVE_WIN32_EXCEPTIONS)
2161		return sigsegv_do_install_handler(handler);
2162		#else
2163		// FAIL: no siginfo_t nor sigcontext subterfuge is available
#	Line 1197 | Line 2183 | void sigsegv_deinstall_handler(void)
2183		SIGSEGV_ALL_SIGNALS
2184		#undef FAULT_HANDLER
2185		#endif
2186	+	#ifdef HAVE_WIN32_EXCEPTIONS
2187	+	sigsegv_fault_handler = NULL;
2188	+	#endif
2189		}
2190
2191
#	Line 1218 | Line 2207 | void sigsegv_set_dump_state(sigsegv_stat
2207		#include <stdio.h>
2208		#include <stdlib.h>
2209		#include <fcntl.h>
2210	+	#ifdef HAVE_SYS_MMAN_H
2211		#include <sys/mman.h>
2212	+	#endif
2213		#include "vm_alloc.h"
2214
2215		const int REF_INDEX = 123;
#	Line 1228 | Line 2219 | static int page_size;
2219		static volatile char * page = 0;
2220		static volatile int handler_called = 0;
2221
2222	+	/* Barriers */
2223	+	#ifdef __GNUC__
2224	+	#define BARRIER() asm volatile ("" : : : "memory")
2225	+	#else
2226	+	#define BARRIER() /* nothing */
2227	+	#endif
2228	+
2229		#ifdef __GNUC__
2230		// Code range where we expect the fault to come from
2231		static void *b_region, *e_region;
2232		#endif
2233
2234	<	static sigsegv_return_t sigsegv_test_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
2234	>	static sigsegv_return_t sigsegv_test_handler(sigsegv_info_t *sip)
2235		{
2236	+	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
2237	+	const sigsegv_address_t instruction_address = sigsegv_get_fault_instruction_address(sip);
2238	+	#if DEBUG
2239	+	printf("sigsegv_test_handler(%p, %p)\n", fault_address, instruction_address);
2240	+	printf("expected fault at %p\n", page + REF_INDEX);
2241	+	#ifdef __GNUC__
2242	+	printf("expected instruction address range: %p-%p\n", b_region, e_region);
2243	+	#endif
2244	+	#endif
2245		handler_called++;
2246		if ((fault_address - REF_INDEX) != page)
2247		exit(10);
2248		#ifdef __GNUC__
2249		// Make sure reported fault instruction address falls into
2250		// expected code range
2251	<	if (instruction_address != SIGSEGV_INVALID_PC
2251	>	if (instruction_address != SIGSEGV_INVALID_ADDRESS
2252		&& ((instruction_address <  (sigsegv_address_t)b_region) ||
2253		(instruction_address >= (sigsegv_address_t)e_region)))
2254		exit(11);
#	Line 1252 | Line 2259 | static sigsegv_return_t sigsegv_test_han
2259		}
2260
2261		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
2262	<	static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
2262	>	static sigsegv_return_t sigsegv_insn_handler(sigsegv_info_t *sip)
2263		{
2264	+	const sigsegv_address_t fault_address = sigsegv_get_fault_address(sip);
2265	+	const sigsegv_address_t instruction_address = sigsegv_get_fault_instruction_address(sip);
2266	+	#if DEBUG
2267	+	printf("sigsegv_insn_handler(%p, %p)\n", fault_address, instruction_address);
2268	+	#endif
2269		if (((unsigned long)fault_address - (unsigned long)page) < page_size) {
2270		#ifdef __GNUC__
2271		// Make sure reported fault instruction address falls into
2272		// expected code range
2273	<	if (instruction_address != SIGSEGV_INVALID_PC
2273	>	if (instruction_address != SIGSEGV_INVALID_ADDRESS
2274		&& ((instruction_address <  (sigsegv_address_t)b_region) ||
2275		(instruction_address >= (sigsegv_address_t)e_region)))
2276		return SIGSEGV_RETURN_FAILURE;
#	Line 1268 | Line 2280 | static sigsegv_return_t sigsegv_insn_han
2280
2281		return SIGSEGV_RETURN_FAILURE;
2282		}
2283	+
2284	+	// More sophisticated tests for instruction skipper
2285	+	static bool arch_insn_skipper_tests()
2286	+	{
2287	+	#if (defined(i386) || defined(__i386__)) || defined(__x86_64__)
2288	+	static const unsigned char code[] = {
2289	+	0x8a, 0x00,                    // mov    (%eax),%al
2290	+	0x8a, 0x2c, 0x18,              // mov    (%eax,%ebx,1),%ch
2291	+	0x88, 0x20,                    // mov    %ah,(%eax)
2292	+	0x88, 0x08,                    // mov    %cl,(%eax)
2293	+	0x66, 0x8b, 0x00,              // mov    (%eax),%ax
2294	+	0x66, 0x8b, 0x0c, 0x18,        // mov    (%eax,%ebx,1),%cx
2295	+	0x66, 0x89, 0x00,              // mov    %ax,(%eax)
2296	+	0x66, 0x89, 0x0c, 0x18,        // mov    %cx,(%eax,%ebx,1)
2297	+	0x8b, 0x00,                    // mov    (%eax),%eax
2298	+	0x8b, 0x0c, 0x18,              // mov    (%eax,%ebx,1),%ecx
2299	+	0x89, 0x00,                    // mov    %eax,(%eax)
2300	+	0x89, 0x0c, 0x18,              // mov    %ecx,(%eax,%ebx,1)
2301	+	#if defined(__x86_64__)
2302	+	0x44, 0x8a, 0x00,              // mov    (%rax),%r8b
2303	+	0x44, 0x8a, 0x20,              // mov    (%rax),%r12b
2304	+	0x42, 0x8a, 0x3c, 0x10,        // mov    (%rax,%r10,1),%dil
2305	+	0x44, 0x88, 0x00,              // mov    %r8b,(%rax)
2306	+	0x44, 0x88, 0x20,              // mov    %r12b,(%rax)
2307	+	0x42, 0x88, 0x3c, 0x10,        // mov    %dil,(%rax,%r10,1)
2308	+	0x66, 0x44, 0x8b, 0x00,        // mov    (%rax),%r8w
2309	+	0x66, 0x42, 0x8b, 0x0c, 0x10,  // mov    (%rax,%r10,1),%cx
2310	+	0x66, 0x44, 0x89, 0x00,        // mov    %r8w,(%rax)
2311	+	0x66, 0x42, 0x89, 0x0c, 0x10,  // mov    %cx,(%rax,%r10,1)
2312	+	0x44, 0x8b, 0x00,              // mov    (%rax),%r8d
2313	+	0x42, 0x8b, 0x0c, 0x10,        // mov    (%rax,%r10,1),%ecx
2314	+	0x44, 0x89, 0x00,              // mov    %r8d,(%rax)
2315	+	0x42, 0x89, 0x0c, 0x10,        // mov    %ecx,(%rax,%r10,1)
2316	+	0x48, 0x8b, 0x08,              // mov    (%rax),%rcx
2317	+	0x4c, 0x8b, 0x18,              // mov    (%rax),%r11
2318	+	0x4a, 0x8b, 0x0c, 0x10,        // mov    (%rax,%r10,1),%rcx
2319	+	0x4e, 0x8b, 0x1c, 0x10,        // mov    (%rax,%r10,1),%r11
2320	+	0x48, 0x89, 0x08,              // mov    %rcx,(%rax)
2321	+	0x4c, 0x89, 0x18,              // mov    %r11,(%rax)
2322	+	0x4a, 0x89, 0x0c, 0x10,        // mov    %rcx,(%rax,%r10,1)
2323	+	0x4e, 0x89, 0x1c, 0x10,        // mov    %r11,(%rax,%r10,1)
2324	+	0x63, 0x47, 0x04,              // movslq 4(%rdi),%eax
2325	+	0x48, 0x63, 0x47, 0x04,        // movslq 4(%rdi),%rax
2326	+	#endif
2327	+	0                              // end
2328	+	};
2329	+	const int N_REGS = 20;
2330	+	unsigned long regs[N_REGS];
2331	+	for (int i = 0; i < N_REGS; i++)
2332	+	regs[i] = i;
2333	+	const unsigned long start_code = (unsigned long)&code;
2334	+	regs[X86_REG_EIP] = start_code;
2335	+	while ((regs[X86_REG_EIP] - start_code) < (sizeof(code) - 1)
2336	+	&& ix86_skip_instruction(regs))
2337	+	; /* simply iterate */
2338	+	return (regs[X86_REG_EIP] - start_code) == (sizeof(code) - 1);
2339	+	#endif
2340	+	return true;
2341	+	}
2342		#endif
2343
2344		int main(void)
#	Line 1275 | Line 2346 | int main(void)
2346		if (vm_init() < 0)
2347		return 1;
2348
2349	<	page_size = getpagesize();
2349	>	page_size = vm_get_page_size();
2350		if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED)
2351		return 2;
2352
#	Line 1295 | Line 2366 | int main(void)
2366		if (page[REF_INDEX] != REF_VALUE)
2367		exit(20);
2368		page[REF_INDEX] = REF_VALUE;
2369	+	BARRIER();
2370		L_e_region1:
2371
2372		if (handler_called != 1)
#	Line 1314 | Line 2386 | int main(void)
2386		return 8;
2387
2388		#define TEST_SKIP_INSTRUCTION(TYPE) do {                                \
2389	<	const unsigned int TAG = 0x12345678;                    \
2389	>	const unsigned long TAG = 0x12345678 |                  \
2390	>	(sizeof(long) == 8 ? 0x9abcdef0UL << 31 : 0);   \
2391		TYPE data = *((TYPE *)(page + sizeof(TYPE)));   \
2392	<	volatile unsigned int effect = data + TAG;              \
2392	>	volatile unsigned long effect = data + TAG;             \
2393		if (effect != TAG)                                                              \
2394		return 9;                                                                       \
2395		} while (0)
#	Line 1329 | Line 2402 | int main(void)
2402		TEST_SKIP_INSTRUCTION(unsigned char);
2403		TEST_SKIP_INSTRUCTION(unsigned short);
2404		TEST_SKIP_INSTRUCTION(unsigned int);
2405	+	TEST_SKIP_INSTRUCTION(unsigned long);
2406	+	TEST_SKIP_INSTRUCTION(signed char);
2407	+	TEST_SKIP_INSTRUCTION(signed short);
2408	+	TEST_SKIP_INSTRUCTION(signed int);
2409	+	TEST_SKIP_INSTRUCTION(signed long);
2410	+	BARRIER();
2411		L_e_region2:
2412	+
2413	+	if (!arch_insn_skipper_tests())
2414	+	return 20;
2415		#endif
2416
2417		vm_exit();
2418		return 0;
2419		}
2420		#endif
1339	–
1340	–
1341	–
1342	–
1343	–
1344	–
1345	–
1346	–
1347	–
1348	–
1349	–
1350	–
1351	–
1352	–
1353	–

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