ViewVC Help

View File | Revision Log | Show Annotations | Revision Graph | Root Listing

root/cebix/BasiliskII/src/Unix/sigsegv.cpp

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.67 by gbeauche, 2007-12-30T08:45:18Z vs.
Revision 1.73 by gbeauche, 2008-01-06T16:10:30Z

#	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) 1997-2005 Christian Bauer
13	>	*  Basilisk II (C) 1997-2008 Christian Bauer
14		*
15		*  This program is free software; you can redistribute it and/or modify
16		*  it under the terms of the GNU General Public License as published by
#	Line 70 | Line 70 | static bool sigsegv_do_install_handler(i
70		enum transfer_type_t {
71		SIGSEGV_TRANSFER_UNKNOWN        = 0,
72		SIGSEGV_TRANSFER_LOAD           = 1,
73	<	SIGSEGV_TRANSFER_STORE          = 2,
73	>	SIGSEGV_TRANSFER_STORE          = 2
74		};
75
76		// Transfer size
#	Line 79 | Line 79 | enum transfer_size_t {
79		SIZE_BYTE,
80		SIZE_WORD, // 2 bytes
81		SIZE_LONG, // 4 bytes
82	<	SIZE_QUAD, // 8 bytes
82	>	SIZE_QUAD  // 8 bytes
83		};
84
85	<	#if (defined(powerpc) || defined(__powerpc__) || defined(__ppc__))
85	>	#if (defined(powerpc) || defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__))
86		// Addressing mode
87		enum addressing_mode_t {
88		MODE_UNKNOWN,
#	Line 605 | Line 605 | if (ret != KERN_SUCCESS) { \
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                   exc_state->dar
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               state.srr0
612	>	#define SIGSEGV_FAULT_INSTRUCTION               SIP->thr_state.srr0
613		#define SIGSEGV_SKIP_INSTRUCTION                powerpc_skip_instruction
614	<	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&state.srr0, (unsigned long *)&state.r0
614	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&SIP->thr_state.srr0, (unsigned long *)&SIP->thr_state.r0
615	>	#endif
616	>	#ifdef __ppc64__
617	>	#define SIGSEGV_EXCEPTION_STATE_TYPE    ppc_exception_state64_t
618	>	#define SIGSEGV_EXCEPTION_STATE_FLAVOR  PPC_EXCEPTION_STATE64
619	>	#define SIGSEGV_EXCEPTION_STATE_COUNT   PPC_EXCEPTION_STATE64_COUNT
620	>	#define SIGSEGV_FAULT_ADDRESS                   SIP->exc_state.dar
621	>	#define SIGSEGV_THREAD_STATE_TYPE               ppc_thread_state64_t
622	>	#define SIGSEGV_THREAD_STATE_FLAVOR             PPC_THREAD_STATE64
623	>	#define SIGSEGV_THREAD_STATE_COUNT              PPC_THREAD_STATE64_COUNT
624	>	#define SIGSEGV_FAULT_INSTRUCTION               SIP->thr_state.srr0
625	>	#define SIGSEGV_SKIP_INSTRUCTION                powerpc_skip_instruction
626	>	#define SIGSEGV_REGISTER_FILE                   (unsigned long *)&SIP->thr_state.srr0, (unsigned long *)&SIP->thr_state.r0
627		#endif
628		#ifdef __i386__
617	–	#ifdef i386_SAVED_STATE
618	–	#define SIGSEGV_THREAD_STATE_TYPE               struct i386_saved_state
619	–	#define SIGSEGV_THREAD_STATE_FLAVOR             i386_SAVED_STATE
620	–	#define SIGSEGV_THREAD_STATE_COUNT              i386_SAVED_STATE_COUNT
621	–	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&state.edi) /* EDI is the first GPR we consider */
622	–	#else
629		#define SIGSEGV_EXCEPTION_STATE_TYPE    struct i386_exception_state
630		#define SIGSEGV_EXCEPTION_STATE_FLAVOR  i386_EXCEPTION_STATE
631		#define SIGSEGV_EXCEPTION_STATE_COUNT   i386_EXCEPTION_STATE_COUNT
632	<	#define SIGSEGV_FAULT_ADDRESS                   exc_state->faultvaddr
632	>	#define SIGSEGV_FAULT_ADDRESS                   SIP->exc_state.faultvaddr
633		#define SIGSEGV_THREAD_STATE_TYPE               struct i386_thread_state
634		#define SIGSEGV_THREAD_STATE_FLAVOR             i386_THREAD_STATE
635		#define SIGSEGV_THREAD_STATE_COUNT              i386_THREAD_STATE_COUNT
636	<	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&state.eax) /* EAX is the first GPR we consider */
631	<	#endif
632	<	#define SIGSEGV_FAULT_INSTRUCTION               state.eip
636	>	#define SIGSEGV_FAULT_INSTRUCTION               SIP->thr_state.eip
637		#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
638	+	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&SIP->thr_state.eax) /* EAX is the first GPR we consider */
639		#endif
640		#ifdef __x86_64__
641		#define SIGSEGV_EXCEPTION_STATE_TYPE    struct x86_exception_state64
642		#define SIGSEGV_EXCEPTION_STATE_FLAVOR  x86_EXCEPTION_STATE64
643		#define SIGSEGV_EXCEPTION_STATE_COUNT   x86_EXCEPTION_STATE64_COUNT
644	<	#define SIGSEGV_FAULT_ADDRESS                   exc_state->faultvaddr
644	>	#define SIGSEGV_FAULT_ADDRESS                   SIP->exc_state.faultvaddr
645		#define SIGSEGV_THREAD_STATE_TYPE               struct x86_thread_state64
646		#define SIGSEGV_THREAD_STATE_FLAVOR             x86_THREAD_STATE64
647		#define SIGSEGV_THREAD_STATE_COUNT              x86_THREAD_STATE64_COUNT
648	<	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&state.rax) /* RAX is the first GPR we consider */
644	<	#define SIGSEGV_FAULT_INSTRUCTION               state.rip
648	>	#define SIGSEGV_FAULT_INSTRUCTION               SIP->thr_state.rip
649		#define SIGSEGV_SKIP_INSTRUCTION                ix86_skip_instruction
650	+	#define SIGSEGV_REGISTER_FILE                   ((unsigned long *)&SIP->thr_state.rax) /* RAX is the first GPR we consider */
651		#endif
652	<	#ifdef SIGSEGV_EXCEPTION_STATE_TYPE
653	<	#define SIGSEGV_FAULT_HANDLER_ARGLIST   mach_port_t thread, SIGSEGV_EXCEPTION_STATE_TYPE *exc_state
649	<	#define SIGSEGV_FAULT_HANDLER_ARGS              thread, &exc_state
650	<	#else
651	<	#define SIGSEGV_FAULT_ADDRESS                   code[1]
652	>	#define SIGSEGV_FAULT_ADDRESS_FAST              code[1]
653	>	#define SIGSEGV_FAULT_INSTRUCTION_FAST  SIGSEGV_INVALID_ADDRESS
654		#define SIGSEGV_FAULT_HANDLER_ARGLIST   mach_port_t thread, exception_data_t code
655		#define SIGSEGV_FAULT_HANDLER_ARGS              thread, code
654	–	#endif
656
657		// Since there can only be one exception thread running at any time
658		// this is not a problem.
#	Line 1160 | Line 1161 | static bool ix86_skip_instruction(unsign
1161		#endif
1162
1163		// Decode and skip PPC instruction
1164	<	#if (defined(powerpc) || defined(__powerpc__) || defined(__ppc__))
1164	>	#if (defined(powerpc) || defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__))
1165		static bool powerpc_skip_instruction(unsigned long * nip_p, unsigned long * regs)
1166		{
1167		instruction_t instr;
#	Line 1635 | Line 1636 | static bool arm_skip_instruction(unsigne
1636
1637
1638		// Fallbacks
1639	+	#ifndef SIGSEGV_FAULT_ADDRESS_FAST
1640	+	#define SIGSEGV_FAULT_ADDRESS_FAST              SIGSEGV_FAULT_ADDRESS
1641	+	#endif
1642	+	#ifndef SIGSEGV_FAULT_INSTRUCTION_FAST
1643	+	#define SIGSEGV_FAULT_INSTRUCTION_FAST  SIGSEGV_FAULT_INSTRUCTION
1644	+	#endif
1645		#ifndef SIGSEGV_FAULT_INSTRUCTION
1646		#define SIGSEGV_FAULT_INSTRUCTION               SIGSEGV_INVALID_ADDRESS
1647		#endif
#	Line 1658 | Line 1665 | static bool arm_skip_instruction(unsigne
1665		struct sigsegv_info_t {
1666		sigsegv_address_t addr;
1667		sigsegv_address_t pc;
1668	+	#ifdef HAVE_MACH_EXCEPTIONS
1669	+	mach_port_t thread;
1670	+	bool has_exc_state;
1671	+	SIGSEGV_EXCEPTION_STATE_TYPE exc_state;
1672	+	mach_msg_type_number_t exc_state_count;
1673	+	bool has_thr_state;
1674	+	SIGSEGV_THREAD_STATE_TYPE thr_state;
1675	+	mach_msg_type_number_t thr_state_count;
1676	+	#endif
1677		};
1678
1679	+	#ifdef HAVE_MACH_EXCEPTIONS
1680	+	static void mach_get_exception_state(sigsegv_info_t *SIP)
1681	+	{
1682	+	SIP->exc_state_count = SIGSEGV_EXCEPTION_STATE_COUNT;
1683	+	kern_return_t krc = thread_get_state(SIP->thread,
1684	+	SIGSEGV_EXCEPTION_STATE_FLAVOR,
1685	+	(natural_t *)&SIP->exc_state,
1686	+	&SIP->exc_state_count);
1687	+	MACH_CHECK_ERROR(thread_get_state, krc);
1688	+	SIP->has_exc_state = true;
1689	+	}
1690	+
1691	+	static void mach_get_thread_state(sigsegv_info_t *SIP)
1692	+	{
1693	+	SIP->thr_state_count = SIGSEGV_THREAD_STATE_COUNT;
1694	+	kern_return_t krc = thread_get_state(SIP->thread,
1695	+	SIGSEGV_THREAD_STATE_FLAVOR,
1696	+	(natural_t *)&SIP->thr_state,
1697	+	&SIP->thr_state_count);
1698	+	MACH_CHECK_ERROR(thread_get_state, krc);
1699	+	SIP->has_thr_state = true;
1700	+	}
1701	+
1702	+	static void mach_set_thread_state(sigsegv_info_t *SIP)
1703	+	{
1704	+	kern_return_t krc = thread_set_state(SIP->thread,
1705	+	SIGSEGV_THREAD_STATE_FLAVOR,
1706	+	(natural_t *)&SIP->thr_state,
1707	+	SIP->thr_state_count);
1708	+	MACH_CHECK_ERROR(thread_set_state, krc);
1709	+	}
1710	+	#endif
1711	+
1712		// Return the address of the invalid memory reference
1713	<	sigsegv_address_t sigsegv_get_fault_address(sigsegv_info_t *sip)
1713	>	sigsegv_address_t sigsegv_get_fault_address(sigsegv_info_t *SIP)
1714		{
1715	<	return sip->addr;
1715	>	#ifdef HAVE_MACH_EXCEPTIONS
1716	>	static int use_fast_path = -1;
1717	>	if (use_fast_path != 1 && !SIP->has_exc_state) {
1718	>	mach_get_exception_state(SIP);
1719	>
1720	>	sigsegv_address_t addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
1721	>	if (use_fast_path < 0)
1722	>	use_fast_path = addr == SIP->addr;
1723	>	SIP->addr = addr;
1724	>	}
1725	>	#endif
1726	>	return SIP->addr;
1727		}
1728
1729		// Return the address of the instruction that caused the fault, or
1730		// SIGSEGV_INVALID_ADDRESS if we could not retrieve this information
1731	<	sigsegv_address_t sigsegv_get_fault_instruction_address(sigsegv_info_t *sip)
1731	>	sigsegv_address_t sigsegv_get_fault_instruction_address(sigsegv_info_t *SIP)
1732		{
1733	<	return sip->pc;
1733	>	#ifdef HAVE_MACH_EXCEPTIONS
1734	>	if (!SIP->has_thr_state) {
1735	>	mach_get_thread_state(SIP);
1736	>
1737	>	SIP->pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
1738	>	}
1739	>	#endif
1740	>	return SIP->pc;
1741		}
1742
1743		// This function handles the badaccess to memory.
1744		// It is called from the signal handler or the exception handler.
1745		static bool handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGLIST_1)
1746		{
1747	+	sigsegv_info_t SI;
1748	+	SI.addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS_FAST;
1749	+	SI.pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION_FAST;
1750		#ifdef HAVE_MACH_EXCEPTIONS
1751	<	// We must match the initial count when writing back the CPU state registers
1752	<	kern_return_t krc;
1753	<	mach_msg_type_number_t count;
1684	<	SIGSEGV_THREAD_STATE_TYPE state;
1685	<
1686	<	count = SIGSEGV_THREAD_STATE_COUNT;
1687	<	krc = thread_get_state(thread, SIGSEGV_THREAD_STATE_FLAVOR, (thread_state_t)&state, &count);
1688	<	MACH_CHECK_ERROR (thread_get_state, krc);
1751	>	SI.thread = thread;
1752	>	SI.has_exc_state = false;
1753	>	SI.has_thr_state = false;
1754		#endif
1755	+	sigsegv_info_t * const SIP = &SI;
1756
1691	–	sigsegv_info_t si;
1692	–	si.addr = (sigsegv_address_t)SIGSEGV_FAULT_ADDRESS;
1693	–	si.pc = (sigsegv_address_t)SIGSEGV_FAULT_INSTRUCTION;
1694	–
1757		// Call user's handler and reinstall the global handler, if required
1758	<	switch (SIGSEGV_FAULT_HANDLER_INVOKE(&si)) {
1758	>	switch (SIGSEGV_FAULT_HANDLER_INVOKE(SIP)) {
1759		case SIGSEGV_RETURN_SUCCESS:
1760		return true;
1761
#	Line 1701 | Line 1763 | static bool handle_badaccess(SIGSEGV_FAU
1763		case SIGSEGV_RETURN_SKIP_INSTRUCTION:
1764		// Call the instruction skipper with the register file
1765		// available
1766	+	#ifdef HAVE_MACH_EXCEPTIONS
1767	+	if (!SIP->has_thr_state)
1768	+	mach_get_thread_state(SIP);
1769	+	#endif
1770		if (SIGSEGV_SKIP_INSTRUCTION(SIGSEGV_REGISTER_FILE)) {
1771		#ifdef HAVE_MACH_EXCEPTIONS
1772		// Unlike UNIX signals where the thread state
1773		// is modified off of the stack, in Mach we
1774		// need to actually call thread_set_state to
1775		// have the register values updated.
1776	<	krc = thread_set_state(thread,
1711	<	SIGSEGV_THREAD_STATE_FLAVOR, (thread_state_t)&state,
1712	<	count);
1713	<	MACH_CHECK_ERROR (thread_set_state, krc);
1776	>	mach_set_thread_state(SIP);
1777		#endif
1778		return true;
1779		}
#	Line 1719 | Line 1782 | static bool handle_badaccess(SIGSEGV_FAU
1782		case SIGSEGV_RETURN_FAILURE:
1783		// We can't do anything with the fault_address, dump state?
1784		if (sigsegv_state_dumper != 0)
1785	<	sigsegv_state_dumper(&si);
1785	>	sigsegv_state_dumper(SIP);
1786		break;
1787		}
1788
#	Line 1868 | Line 1931 | catch_exception_raise(mach_port_t except
1931		switch (code[0]) {
1932		case KERN_PROTECTION_FAILURE:
1933		case KERN_INVALID_ADDRESS:
1871	–	{
1872	–	#ifdef SIGSEGV_EXCEPTION_STATE_TYPE
1873	–	SIGSEGV_EXCEPTION_STATE_TYPE exc_state;
1874	–	mach_msg_type_number_t exc_state_count;
1875	–	exc_state_count = SIGSEGV_EXCEPTION_STATE_COUNT;
1876	–	krc = thread_get_state(thread, SIGSEGV_EXCEPTION_STATE_FLAVOR, (natural_t *)&exc_state, &exc_state_count);
1877	–	MACH_CHECK_ERROR (thread_get_state, krc);
1878	–	#endif
1879	–
1934		if (handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGS))
1935		return KERN_SUCCESS;
1936		break;
1937		}
1884	–	}
1938		}
1939
1940		// In Mach we do not need to remove the exception handler.

Diff Legend

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