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

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.43 by nigel, 2004-01-20T23:49:32Z vs.
Revision 1.52 by gbeauche, 2005-01-30T21:42:14Z

#	Line 10 \| Line 10
10		* tjw@omnigroup.com Sun, 4 Jun 2000
11		* www.omnigroup.com/mailman/archive/macosx-dev/2000-June/002030.html
12		*
13	<	* Basilisk II (C) 1997-2004 Christian Bauer
13	>	* Basilisk II (C) 1997-2005 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 97 \| 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 174 \| 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 214 \| 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 252 \| Line 264 \| static void powerpc_decode_instruction(i
264		#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
265		#endif
266		#endif
267	+	#if defined(__NetBSD__)
268	+	#if (defined(i386) \|\| defined(__i386__))
269	+	#include <sys/ucontext.h>
270	+	#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.__gregs)
271	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS[_REG_EIP]
272	+	#define SIGSEGV_REGISTER_FILE (unsigned long *)SIGSEGV_CONTEXT_REGS
273	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
274	+	#endif
275	+	#endif
276		#if defined(__linux__)
277		#if (defined(i386) \|\| defined(__i386__))
278		#include <sys/ucontext.h>
#	Line 274 \| Line 295 \| static void powerpc_decode_instruction(i
295		#include <sys/ucontext.h>
296		#define SIGSEGV_CONTEXT_REGS (((ucontext_t *)scp)->uc_mcontext.regs)
297		#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS->nip)
298	<	#define SIGSEGV_REGISTER_FILE (unsigned int )&SIGSEGV_CONTEXT_REGS->nip, (unsigned int )(SIGSEGV_CONTEXT_REGS->gpr)
298	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&SIGSEGV_CONTEXT_REGS->nip, (unsigned long )(SIGSEGV_CONTEXT_REGS->gpr)
299		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
300		#endif
301		#if (defined(hppa) \|\| defined(__hppa__))
#	Line 285 \| Line 306 \| static void powerpc_decode_instruction(i
306		#include <asm/ucontext.h> /* use kernel structure, glibc may not be in sync */
307		#define SIGSEGV_CONTEXT_REGS (((struct ucontext *)scp)->uc_mcontext)
308		#define SIGSEGV_FAULT_INSTRUCTION (SIGSEGV_CONTEXT_REGS.arm_pc)
309	+	#define SIGSEGV_REGISTER_FILE (&SIGSEGV_CONTEXT_REGS.arm_r0)
310	+	#define SIGSEGV_SKIP_INSTRUCTION arm_skip_instruction
311		#endif
312		#endif
313		#endif
#	Line 315 \| Line 338 \| static void powerpc_decode_instruction(i
338		#define SIGSEGV_FAULT_HANDLER_ARGS sig, scp
339		#define SIGSEGV_FAULT_ADDRESS scp->regs->dar
340		#define SIGSEGV_FAULT_INSTRUCTION scp->regs->nip
341	<	#define SIGSEGV_REGISTER_FILE (unsigned int )&scp->regs->nip, (unsigned int )(scp->regs->gpr)
341	>	#define SIGSEGV_REGISTER_FILE (unsigned long )&scp->regs->nip, (unsigned long )(scp->regs->gpr)
342		#define SIGSEGV_SKIP_INSTRUCTION powerpc_skip_instruction
343		#endif
344		#if (defined(alpha) \|\| defined(__alpha__))
#	Line 331 \| Line 354 \| static void powerpc_decode_instruction(i
354		#define SIGSEGV_FAULT_HANDLER_ARGS &sc
355		#define SIGSEGV_FAULT_ADDRESS scp->fault_address
356		#define SIGSEGV_FAULT_INSTRUCTION scp->arm_pc
357	+	#define SIGSEGV_REGISTER_FILE &scp->arm_r0
358	+	#define SIGSEGV_SKIP_INSTRUCTION arm_skip_instruction
359		#endif
360		#endif
361
#	Line 477 \| Line 502 \| static sigsegv_address_t get_fault_addre
502		#endif
503		#endif
504
505	+	#if HAVE_WIN32_EXCEPTIONS
506	+	#define WIN32_LEAN_AND_MEAN /* avoid including junk */
507	+	#include <windows.h>
508	+	#include <winerror.h>
509	+
510	+	#define SIGSEGV_FAULT_HANDLER_ARGLIST EXCEPTION_POINTERS *ExceptionInfo
511	+	#define SIGSEGV_FAULT_HANDLER_ARGS ExceptionInfo
512	+	#define SIGSEGV_FAULT_ADDRESS ExceptionInfo->ExceptionRecord->ExceptionInformation[1]
513	+	#define SIGSEGV_CONTEXT_REGS ExceptionInfo->ContextRecord
514	+	#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_CONTEXT_REGS->Eip
515	+	#define SIGSEGV_REGISTER_FILE ((unsigned long *)&SIGSEGV_CONTEXT_REGS->Edi)
516	+	#define SIGSEGV_SKIP_INSTRUCTION ix86_skip_instruction
517	+	#endif
518	+
519		#if HAVE_MACH_EXCEPTIONS
520
521		// This can easily be extended to other Mach systems, but really who
#	Line 654 \| Line 693 \| enum {
693		#endif
694		};
695		#endif
696	<	#if defined(__NetBSD__) \|\| defined(__FreeBSD__)
696	>	#if defined(__NetBSD__)
697	>	enum {
698	>	#if (defined(i386) \|\| defined(__i386__))
699	>	X86_REG_EIP = _REG_EIP,
700	>	X86_REG_EAX = _REG_EAX,
701	>	X86_REG_ECX = _REG_ECX,
702	>	X86_REG_EDX = _REG_EDX,
703	>	X86_REG_EBX = _REG_EBX,
704	>	X86_REG_ESP = _REG_ESP,
705	>	X86_REG_EBP = _REG_EBP,
706	>	X86_REG_ESI = _REG_ESI,
707	>	X86_REG_EDI = _REG_EDI
708	>	#endif
709	>	};
710	>	#endif
711	>	#if defined(__FreeBSD__)
712		enum {
713		#if (defined(i386) \|\| defined(__i386__))
714		X86_REG_EIP = 10,
#	Line 669 \| Line 723 \| enum {
723		#endif
724		};
725		#endif
726	+	#if defined(_WIN32)
727	+	enum {
728	+	#if (defined(i386) \|\| defined(__i386__))
729	+	X86_REG_EIP = 7,
730	+	X86_REG_EAX = 5,
731	+	X86_REG_ECX = 4,
732	+	X86_REG_EDX = 3,
733	+	X86_REG_EBX = 2,
734	+	X86_REG_ESP = 10,
735	+	X86_REG_EBP = 6,
736	+	X86_REG_ESI = 1,
737	+	X86_REG_EDI = 0
738	+	#endif
739	+	};
740	+	#endif
741		// FIXME: this is partly redundant with the instruction decoding phase
742		// to discover transfer type and register number
743		static inline int ix86_step_over_modrm(unsigned char * p)
#	Line 709 \| Line 778 \| static bool ix86_skip_instruction(unsign
778
779		if (eip == 0)
780		return false;
781	+	#ifdef _WIN32
782	+	if (IsBadCodePtr((FARPROC)eip))
783	+	return false;
784	+	#endif
785
786		transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
787		transfer_size_t transfer_size = SIZE_LONG;
#	Line 762 \| Line 835 \| static bool ix86_skip_instruction(unsign
835		#endif
836
837		// Decode instruction
838	+	int target_size = SIZE_UNKNOWN;
839		switch (eip[0]) {
840		case 0x0f:
841	+	target_size = transfer_size;
842		switch (eip[1]) {
843	+	case 0xbe: // MOVSX r32, r/m8
844		case 0xb6: // MOVZX r32, r/m8
845	+	transfer_size = SIZE_BYTE;
846	+	goto do_mov_extend;
847	+	case 0xbf: // MOVSX r32, r/m16
848		case 0xb7: // MOVZX r32, r/m16
849	<	switch (eip[2] & 0xc0) {
850	<	case 0x80:
851	<	reg = (eip[2] >> 3) & 7;
852	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
853	<	break;
854	<	case 0x40:
855	<	reg = (eip[2] >> 3) & 7;
856	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
857	<	break;
858	<	case 0x00:
859	<	reg = (eip[2] >> 3) & 7;
860	<	transfer_type = SIGSEGV_TRANSFER_LOAD;
861	<	break;
862	<	}
863	<	len += 3 + ix86_step_over_modrm(eip + 2);
864	<	break;
849	>	transfer_size = SIZE_WORD;
850	>	goto do_mov_extend;
851	>	do_mov_extend:
852	>	switch (eip[2] & 0xc0) {
853	>	case 0x80:
854	>	reg = (eip[2] >> 3) & 7;
855	>	transfer_type = SIGSEGV_TRANSFER_LOAD;
856	>	break;
857	>	case 0x40:
858	>	reg = (eip[2] >> 3) & 7;
859	>	transfer_type = SIGSEGV_TRANSFER_LOAD;
860	>	break;
861	>	case 0x00:
862	>	reg = (eip[2] >> 3) & 7;
863	>	transfer_type = SIGSEGV_TRANSFER_LOAD;
864	>	break;
865	>	}
866	>	len += 3 + ix86_step_over_modrm(eip + 2);
867	>	break;
868		}
869		break;
870		case 0x8a: // MOV r8, r/m8
#	Line 824 \| Line 906 \| static bool ix86_skip_instruction(unsign
906		len += 2 + ix86_step_over_modrm(eip + 1);
907		break;
908		}
909	+	if (target_size == SIZE_UNKNOWN)
910	+	target_size = transfer_size;
911
912		if (transfer_type == SIGSEGV_TRANSFER_UNKNOWN) {
913		// Unknown machine code, let it crash. Then patch the decoder
#	Line 851 \| Line 935 \| static bool ix86_skip_instruction(unsign
935		// Set 0 to the relevant register part
936		// NOTE: this is only valid for MOV alike instructions
937		int rloc = x86_reg_map[reg];
938	<	switch (transfer_size) {
938	>	switch (target_size) {
939		case SIZE_BYTE:
940		if (has_rex \|\| reg < 4)
941		regs[rloc] = (regs[rloc] & ~0x00ffL);
#	Line 905 \| Line 989 \| static bool ix86_skip_instruction(unsign
989		"r12", "r13", "r14", "r15",
990		};
991		const char * reg_str = NULL;
992	<	switch (transfer_size) {
992	>	switch (target_size) {
993		case SIZE_BYTE:
994		reg_str = x86_byte_reg_str_map[(!has_rex && reg >= 4 ? 12 : 0) + reg];
995		break;
#	Line 928 \| Line 1012 \| static bool ix86_skip_instruction(unsign
1012
1013		// Decode and skip PPC instruction
1014		#if (defined(powerpc) \|\| defined(__powerpc__) \|\| defined(__ppc__))
1015	<	static bool powerpc_skip_instruction(unsigned int * nip_p, unsigned int * regs)
1015	>	static bool powerpc_skip_instruction(unsigned long * nip_p, unsigned long * regs)
1016		{
1017		instruction_t instr;
1018		powerpc_decode_instruction(&instr, *nip_p, regs);
#	Line 940 \| Line 1024 \| static bool powerpc_skip_instruction(uns
1024
1025		#if DEBUG
1026		printf("%08x: %s %s access", *nip_p,
1027	<	instr.transfer_size == SIZE_BYTE ? "byte" : instr.transfer_size == SIZE_WORD ? "word" : "long",
1027	>	instr.transfer_size == SIZE_BYTE ? "byte" :
1028	>	instr.transfer_size == SIZE_WORD ? "word" :
1029	>	instr.transfer_size == SIZE_LONG ? "long" : "quad",
1030		instr.transfer_type == SIGSEGV_TRANSFER_LOAD ? "read" : "write");
1031
1032		if (instr.addr_mode == MODE_U \|\| instr.addr_mode == MODE_UX)
#	Line 1252 \| Line 1338 \| static bool sparc_skip_instruction(unsig
1338		#endif
1339		#endif
1340
1341	+	// Decode and skip ARM instruction
1342	+	#if (defined(arm) \|\| defined(__arm__))
1343	+	enum {
1344	+	#if (defined(__linux__))
1345	+	ARM_REG_PC = 15,
1346	+	ARM_REG_CPSR = 16
1347	+	#endif
1348	+	};
1349	+	static bool arm_skip_instruction(unsigned long * regs)
1350	+	{
1351	+	unsigned int * pc = (unsigned int *)regs[ARM_REG_PC];
1352	+
1353	+	if (pc == 0)
1354	+	return false;
1355	+
1356	+	#if DEBUG
1357	+	printf("IP: %p [%08x]\n", pc, pc[0]);
1358	+	#endif
1359	+
1360	+	transfer_type_t transfer_type = SIGSEGV_TRANSFER_UNKNOWN;
1361	+	transfer_size_t transfer_size = SIZE_UNKNOWN;
1362	+	enum { op_sdt = 1, op_sdth = 2 };
1363	+	int op = 0;
1364	+
1365	+	// Handle load/store instructions only
1366	+	const unsigned int opcode = pc[0];
1367	+	switch ((opcode >> 25) & 7) {
1368	+	case 0: // Halfword and Signed Data Transfer (LDRH, STRH, LDRSB, LDRSH)
1369	+	op = op_sdth;
1370	+	// Determine transfer size (S/H bits)
1371	+	switch ((opcode >> 5) & 3) {
1372	+	case 0: // SWP instruction
1373	+	break;
1374	+	case 1: // Unsigned halfwords
1375	+	case 3: // Signed halfwords
1376	+	transfer_size = SIZE_WORD;
1377	+	break;
1378	+	case 2: // Signed byte
1379	+	transfer_size = SIZE_BYTE;
1380	+	break;
1381	+	}
1382	+	break;
1383	+	case 2:
1384	+	case 3: // Single Data Transfer (LDR, STR)
1385	+	op = op_sdt;
1386	+	// Determine transfer size (B bit)
1387	+	if (((opcode >> 22) & 1) == 1)
1388	+	transfer_size = SIZE_BYTE;
1389	+	else
1390	+	transfer_size = SIZE_LONG;
1391	+	break;
1392	+	default:
1393	+	// FIXME: support load/store mutliple?
1394	+	return false;
1395	+	}
1396	+
1397	+	// Check for invalid transfer size (SWP instruction?)
1398	+	if (transfer_size == SIZE_UNKNOWN)
1399	+	return false;
1400	+
1401	+	// Determine transfer type (L bit)
1402	+	if (((opcode >> 20) & 1) == 1)
1403	+	transfer_type = SIGSEGV_TRANSFER_LOAD;
1404	+	else
1405	+	transfer_type = SIGSEGV_TRANSFER_STORE;
1406	+
1407	+	// Compute offset
1408	+	int offset;
1409	+	if (((opcode >> 25) & 1) == 0) {
1410	+	if (op == op_sdt)
1411	+	offset = opcode & 0xfff;
1412	+	else if (op == op_sdth) {
1413	+	int rm = opcode & 0xf;
1414	+	if (((opcode >> 22) & 1) == 0) {
1415	+	// register offset
1416	+	offset = regs[rm];
1417	+	}
1418	+	else {
1419	+	// immediate offset
1420	+	offset = ((opcode >> 4) & 0xf0) \| (opcode & 0x0f);
1421	+	}
1422	+	}
1423	+	}
1424	+	else {
1425	+	const int rm = opcode & 0xf;
1426	+	const int sh = (opcode >> 7) & 0x1f;
1427	+	if (((opcode >> 4) & 1) == 1) {
1428	+	// we expect only legal load/store instructions
1429	+	printf("FATAL: invalid shift operand\n");
1430	+	return false;
1431	+	}
1432	+	const unsigned int v = regs[rm];
1433	+	switch ((opcode >> 5) & 3) {
1434	+	case 0: // logical shift left
1435	+	offset = sh ? v << sh : v;
1436	+	break;
1437	+	case 1: // logical shift right
1438	+	offset = sh ? v >> sh : 0;
1439	+	break;
1440	+	case 2: // arithmetic shift right
1441	+	if (sh)
1442	+	offset = ((signed int)v) >> sh;
1443	+	else
1444	+	offset = (v & 0x80000000) ? 0xffffffff : 0;
1445	+	break;
1446	+	case 3: // rotate right
1447	+	if (sh)
1448	+	offset = (v >> sh) \| (v << (32 - sh));
1449	+	else
1450	+	offset = (v >> 1) \| ((regs[ARM_REG_CPSR] << 2) & 0x80000000);
1451	+	break;
1452	+	}
1453	+	}
1454	+	if (((opcode >> 23) & 1) == 0)
1455	+	offset = -offset;
1456	+
1457	+	int rd = (opcode >> 12) & 0xf;
1458	+	int rn = (opcode >> 16) & 0xf;
1459	+	#if DEBUG
1460	+	static const char * reg_names[] = {
1461	+	"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
1462	+	"r9", "r9", "sl", "fp", "ip", "sp", "lr", "pc"
1463	+	};
1464	+	printf("%s %s register %s\n",
1465	+	transfer_size == SIZE_BYTE ? "byte" :
1466	+	transfer_size == SIZE_WORD ? "word" :
1467	+	transfer_size == SIZE_LONG ? "long" : "unknown",
1468	+	transfer_type == SIGSEGV_TRANSFER_LOAD ? "load to" : "store from",
1469	+	reg_names[rd]);
1470	+	#endif
1471	+
1472	+	unsigned int base = regs[rn];
1473	+	if (((opcode >> 24) & 1) == 1)
1474	+	base += offset;
1475	+
1476	+	if (transfer_type == SIGSEGV_TRANSFER_LOAD)
1477	+	regs[rd] = 0;
1478	+
1479	+	if (((opcode >> 24) & 1) == 0) // post-index addressing
1480	+	regs[rn] += offset;
1481	+	else if (((opcode >> 21) & 1) == 1) // write-back address into base
1482	+	regs[rn] = base;
1483	+
1484	+	regs[ARM_REG_PC] += 4;
1485	+	return true;
1486	+	}
1487	+	#endif
1488	+
1489	+
1490		// Fallbacks
1491		#ifndef SIGSEGV_FAULT_INSTRUCTION
1492		#define SIGSEGV_FAULT_INSTRUCTION SIGSEGV_INVALID_PC
#	Line 1273 \| Line 1508 \| static bool sparc_skip_instruction(unsig
1508		* SIGSEGV global handler
1509		*/
1510
1276	–	#if defined(HAVE_SIGSEGV_RECOVERY) \|\| defined(HAVE_MACH_EXCEPTIONS)
1511		// This function handles the badaccess to memory.
1512		// It is called from the signal handler or the exception handler.
1513		static bool handle_badaccess(SIGSEGV_FAULT_HANDLER_ARGLIST_1)
#	Line 1308 \| Line 1542 \| static bool handle_badaccess(SIGSEGV_FAU
1542		break;
1543		#endif
1544		case SIGSEGV_RETURN_FAILURE:
1545	<	return false;
1545	>	// We can't do anything with the fault_address, dump state?
1546	>	if (sigsegv_state_dumper != 0)
1547	>	sigsegv_state_dumper(fault_address, fault_instruction);
1548	>	break;
1549		}
1313	–
1314	–	// We can't do anything with the fault_address, dump state?
1315	–	if (sigsegv_state_dumper != 0)
1316	–	sigsegv_state_dumper(fault_address, fault_instruction);
1550
1551		return false;
1552		}
1320	–	#endif
1553
1554
1555		/*
#	Line 1611 \| Line 1843 \| static bool sigsegv_do_install_handler(s
1843		}
1844		#endif
1845
1846	+	#ifdef HAVE_WIN32_EXCEPTIONS
1847	+	static LONG WINAPI main_exception_filter(EXCEPTION_POINTERS *ExceptionInfo)
1848	+	{
1849	+	if (sigsegv_fault_handler != NULL
1850	+	&& ExceptionInfo->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION
1851	+	&& ExceptionInfo->ExceptionRecord->NumberParameters == 2
1852	+	&& handle_badaccess(ExceptionInfo))
1853	+	return EXCEPTION_CONTINUE_EXECUTION;
1854	+
1855	+	return EXCEPTION_CONTINUE_SEARCH;
1856	+	}
1857	+
1858	+	#if defined __CYGWIN__ && defined __i386__
1859	+	/* In Cygwin programs, SetUnhandledExceptionFilter has no effect because Cygwin
1860	+	installs a global exception handler. We have to dig deep in order to install
1861	+	our main_exception_filter. */
1862	+
1863	+	/* Data structures for the current thread's exception handler chain.
1864	+	On the x86 Windows uses register fs, offset 0 to point to the current
1865	+	exception handler; Cygwin mucks with it, so we must do the same... :-/ */
1866	+
1867	+	/* Magic taken from winsup/cygwin/include/exceptions.h. */
1868	+
1869	+	struct exception_list {
1870	+	struct exception_list *prev;
1871	+	int (handler) (EXCEPTION_RECORD , void , CONTEXT , void *);
1872	+	};
1873	+	typedef struct exception_list exception_list;
1874	+
1875	+	/* Magic taken from winsup/cygwin/exceptions.cc. */
1876	+
1877	+	__asm__ (".equ __except_list,0");
1878	+
1879	+	extern exception_list *_except_list __asm__ ("%fs:__except_list");
1880	+
1881	+	/* For debugging. _except_list is not otherwise accessible from gdb. */
1882	+	static exception_list *
1883	+	debug_get_except_list ()
1884	+	{
1885	+	return _except_list;
1886	+	}
1887	+
1888	+	/* Cygwin's original exception handler. */
1889	+	static int (cygwin_exception_handler) (EXCEPTION_RECORD , void , CONTEXT , void *);
1890	+
1891	+	/* Our exception handler. */
1892	+	static int
1893	+	libsigsegv_exception_handler (EXCEPTION_RECORD exception, void frame, CONTEXT context, void dispatch)
1894	+	{
1895	+	EXCEPTION_POINTERS ExceptionInfo;
1896	+	ExceptionInfo.ExceptionRecord = exception;
1897	+	ExceptionInfo.ContextRecord = context;
1898	+	if (main_exception_filter (&ExceptionInfo) == EXCEPTION_CONTINUE_SEARCH)
1899	+	return cygwin_exception_handler (exception, frame, context, dispatch);
1900	+	else
1901	+	return 0;
1902	+	}
1903	+
1904	+	static void
1905	+	do_install_main_exception_filter ()
1906	+	{
1907	+	/* We cannot insert any handler into the chain, because such handlers
1908	+	must lie on the stack (?). Instead, we have to replace(!) Cygwin's
1909	+	global exception handler. */
1910	+	cygwin_exception_handler = _except_list->handler;
1911	+	_except_list->handler = libsigsegv_exception_handler;
1912	+	}
1913	+
1914	+	#else
1915	+
1916	+	static void
1917	+	do_install_main_exception_filter ()
1918	+	{
1919	+	SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) &main_exception_filter);
1920	+	}
1921	+	#endif
1922	+
1923	+	static bool sigsegv_do_install_handler(sigsegv_fault_handler_t handler)
1924	+	{
1925	+	static bool main_exception_filter_installed = false;
1926	+	if (!main_exception_filter_installed) {
1927	+	do_install_main_exception_filter();
1928	+	main_exception_filter_installed = true;
1929	+	}
1930	+	sigsegv_fault_handler = handler;
1931	+	return true;
1932	+	}
1933	+	#endif
1934	+
1935		bool sigsegv_install_handler(sigsegv_fault_handler_t handler)
1936		{
1937		#if defined(HAVE_SIGSEGV_RECOVERY)
#	Line 1621 \| Line 1942 \| bool sigsegv_install_handler(sigsegv_fau
1942		if (success)
1943		sigsegv_fault_handler = handler;
1944		return success;
1945	<	#elif defined(HAVE_MACH_EXCEPTIONS)
1945	>	#elif defined(HAVE_MACH_EXCEPTIONS) \|\| defined(HAVE_WIN32_EXCEPTIONS)
1946		return sigsegv_do_install_handler(handler);
1947		#else
1948		// FAIL: no siginfo_t nor sigcontext subterfuge is available
#	Line 1647 \| Line 1968 \| void sigsegv_deinstall_handler(void)
1968		SIGSEGV_ALL_SIGNALS
1969		#undef FAULT_HANDLER
1970		#endif
1971	+	#ifdef HAVE_WIN32_EXCEPTIONS
1972	+	sigsegv_fault_handler = NULL;
1973	+	#endif
1974		}
1975
1976
#	Line 1668 \| Line 1992 \| void sigsegv_set_dump_state(sigsegv_stat
1992		#include <stdio.h>
1993		#include <stdlib.h>
1994		#include <fcntl.h>
1995	+	#ifdef HAVE_SYS_MMAN_H
1996		#include <sys/mman.h>
1997	+	#endif
1998		#include "vm_alloc.h"
1999
2000		const int REF_INDEX = 123;
#	Line 1711 \| Line 2037 \| static sigsegv_return_t sigsegv_test_han
2037		#ifdef HAVE_SIGSEGV_SKIP_INSTRUCTION
2038		static sigsegv_return_t sigsegv_insn_handler(sigsegv_address_t fault_address, sigsegv_address_t instruction_address)
2039		{
2040	+	#if DEBUG
2041	+	printf("sigsegv_insn_handler(%p, %p)\n", fault_address, instruction_address);
2042	+	#endif
2043		if (((unsigned long)fault_address - (unsigned long)page) < page_size) {
2044		#ifdef __GNUC__
2045		// Make sure reported fault instruction address falls into
#	Line 1789 \| Line 2118 \| int main(void)
2118		if (vm_init() < 0)
2119		return 1;
2120
2121	+	#ifdef _WIN32
2122	+	page_size = 4096;
2123	+	#else
2124		page_size = getpagesize();
2125	+	#endif
2126		if ((page = (char *)vm_acquire(page_size)) == VM_MAP_FAILED)
2127		return 2;
2128
#	Line 1845 \| Line 2178 \| int main(void)
2178		TEST_SKIP_INSTRUCTION(unsigned short);
2179		TEST_SKIP_INSTRUCTION(unsigned int);
2180		TEST_SKIP_INSTRUCTION(unsigned long);
2181	+	TEST_SKIP_INSTRUCTION(signed char);
2182	+	TEST_SKIP_INSTRUCTION(signed short);
2183	+	TEST_SKIP_INSTRUCTION(signed int);
2184	+	TEST_SKIP_INSTRUCTION(signed long);
2185		L_e_region2:
2186
2187		if (!arch_insn_skipper_tests())

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Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents): Revision 1.43 by nigel, 2004-01-20T23:49:32Z vs. Revision 1.52 by gbeauche, 2005-01-30T21:42:14Z

Diff Legend

Comparing BasiliskII/src/Unix/sigsegv.cpp (file contents):
Revision 1.43 by nigel, 2004-01-20T23:49:32Z vs.
Revision 1.52 by gbeauche, 2005-01-30T21:42:14Z