230 lines
6.8 KiB
C
230 lines
6.8 KiB
C
/*
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* Emulator signal handling
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*
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* Copyright 1995 Alexandre Julliard
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*/
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#include <stdlib.h>
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#include <signal.h>
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#include <string.h>
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#include <errno.h>
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#include <time.h>
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#include <setjmp.h>
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#include <sys/time.h>
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#include <sys/timeb.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include "debugger.h"
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#include "options.h"
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#include "sig_context.h"
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#include "miscemu.h"
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#include "dosexe.h"
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#include "thread.h"
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#include "debug.h"
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static const char * const SIGNAL_traps[] =
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{
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"Division by zero exception", /* 0 */
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"Debug exception", /* 1 */
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"NMI interrupt", /* 2 */
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"Breakpoint exception", /* 3 */
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"Overflow exception", /* 4 */
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"Bound range exception", /* 5 */
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"Invalid opcode exception", /* 6 */
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"Device not available exception", /* 7 */
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"Double fault exception", /* 8 */
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"Coprocessor segment overrun", /* 9 */
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"Invalid TSS exception", /* 10 */
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"Segment not present exception", /* 11 */
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"Stack fault", /* 12 */
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"General protection fault", /* 13 */
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"Page fault", /* 14 */
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"Unknown exception", /* 15 */
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"Floating point exception", /* 16 */
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"Alignment check exception", /* 17 */
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"Machine check exception" /* 18 */
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};
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#define NB_TRAPS (sizeof(SIGNAL_traps) / sizeof(SIGNAL_traps[0]))
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extern void SIGNAL_SetHandler( int sig, void (*func)(), int flags );
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extern BOOL32 INSTR_EmulateInstruction( SIGCONTEXT *context );
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/**********************************************************************
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* SIGNAL_break
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*
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* Handle Ctrl-C and such
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*/
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static HANDLER_DEF(SIGNAL_break)
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{
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HANDLER_INIT();
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if (Options.debug)
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wine_debug( signal, HANDLER_CONTEXT ); /* Enter our debugger */
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else exit(0);
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}
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/**********************************************************************
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* SIGNAL_trap
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*
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* SIGTRAP handler.
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*/
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static HANDLER_DEF(SIGNAL_trap)
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{
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HANDLER_INIT();
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wine_debug( signal, HANDLER_CONTEXT ); /* Enter our debugger */
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}
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/**********************************************************************
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* SIGNAL_fault
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*
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* Segfault handler.
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*/
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static HANDLER_DEF(SIGNAL_fault)
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{
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const char *fault = "Segmentation fault";
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HANDLER_INIT();
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if (INSTR_EmulateInstruction( HANDLER_CONTEXT )) return;
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#ifdef TRAP_sig
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if (TRAP_sig( HANDLER_CONTEXT ) < NB_TRAPS)
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fault = SIGNAL_traps[TRAP_sig( HANDLER_CONTEXT )];
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#endif
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if (IS_SELECTOR_SYSTEM(CS_sig(HANDLER_CONTEXT)))
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{
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MSG("%s in 32-bit code (0x%08lx).\n", fault, EIP_sig(HANDLER_CONTEXT));
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}
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else
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{
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MSG("%s in 16-bit code (%04x:%04lx).\n", fault,
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(WORD)CS_sig(HANDLER_CONTEXT), EIP_sig(HANDLER_CONTEXT) );
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}
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#ifdef CR2_sig
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MSG("Fault address is 0x%08lx\n",CR2_sig(HANDLER_CONTEXT));
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#endif
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wine_debug( signal, HANDLER_CONTEXT );
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}
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/***********************************************************************
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* SIGNAL_SetContext
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*
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* Set the register values from a sigcontext.
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*/
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#ifdef UNUSED_FUNCTIONS
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static void SIGNAL_SetSigContext( const SIGCONTEXT *sigcontext,
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CONTEXT *context )
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{
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EAX_reg(context) = EAX_sig(sigcontext);
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EBX_reg(context) = EBX_sig(sigcontext);
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ECX_reg(context) = ECX_sig(sigcontext);
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EDX_reg(context) = EDX_sig(sigcontext);
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ESI_reg(context) = ESI_sig(sigcontext);
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EDI_reg(context) = EDI_sig(sigcontext);
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EBP_reg(context) = EBP_sig(sigcontext);
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EFL_reg(context) = EFL_sig(sigcontext);
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EIP_reg(context) = EIP_sig(sigcontext);
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ESP_reg(context) = ESP_sig(sigcontext);
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CS_reg(context) = LOWORD(CS_sig(sigcontext));
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DS_reg(context) = LOWORD(DS_sig(sigcontext));
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ES_reg(context) = LOWORD(ES_sig(sigcontext));
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SS_reg(context) = LOWORD(SS_sig(sigcontext));
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#ifdef FS_sig
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FS_reg(context) = LOWORD(FS_sig(sigcontext));
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#else
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GET_FS( FS_reg(&DEBUG_context) );
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FS_reg(context) &= 0xffff;
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#endif
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#ifdef GS_sig
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GS_reg(context) = LOWORD(GS_sig(sigcontext));
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#else
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GET_GS( GS_reg(&DEBUG_context) );
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GS_reg(context) &= 0xffff;
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#endif
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}
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#endif
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/***********************************************************************
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* SIGNAL_GetSigContext
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*
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* Build a sigcontext from the register values.
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*/
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#ifdef UNUSED_FUNCTIONS
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static void SIGNAL_GetSigContext( SIGCONTEXT *sigcontext,
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const CONTEXT *context )
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{
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EAX_sig(sigcontext) = EAX_reg(context);
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EBX_sig(sigcontext) = EBX_reg(context);
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ECX_sig(sigcontext) = ECX_reg(context);
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EDX_sig(sigcontext) = EDX_reg(context);
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ESI_sig(sigcontext) = ESI_reg(context);
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EDI_sig(sigcontext) = EDI_reg(context);
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EBP_sig(sigcontext) = EBP_reg(context);
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EFL_sig(sigcontext) = EFL_reg(context);
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EIP_sig(sigcontext) = EIP_reg(context);
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ESP_sig(sigcontext) = ESP_reg(context);
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CS_sig(sigcontext) = CS_reg(context);
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DS_sig(sigcontext) = DS_reg(context);
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ES_sig(sigcontext) = ES_reg(context);
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SS_sig(sigcontext) = SS_reg(context);
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#ifdef FS_sig
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FS_sig(sigcontext) = FS_reg(context);
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#else
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SET_FS( FS_reg(&DEBUG_context) );
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#endif
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#ifdef GS_sig
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GS_sig(sigcontext) = GS_reg(context);
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#else
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SET_GS( GS_reg(&DEBUG_context) );
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#endif
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}
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#endif
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/***********************************************************************
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* SIGNAL_InfoRegisters
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*
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* Display registers information.
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*/
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void SIGNAL_InfoRegisters( CONTEXT *context )
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{
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MSG(" CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
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(WORD)CS_reg(context), (WORD)SS_reg(context),
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(WORD)DS_reg(context), (WORD)ES_reg(context),
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(WORD)FS_reg(context), (WORD)GS_reg(context) );
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MSG( "\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx\n",
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EIP_reg(context), ESP_reg(context),
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EBP_reg(context), EFL_reg(context) );
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MSG( " EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
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EAX_reg(context), EBX_reg(context),
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ECX_reg(context), EDX_reg(context) );
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MSG( " ESI:%08lx EDI:%08lx\n",
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ESI_reg(context), EDI_reg(context) );
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}
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/**********************************************************************
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* SIGNAL_InitEmulator
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*
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* Initialize emulator signals.
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*/
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BOOL32 SIGNAL_InitEmulator(void)
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{
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SIGNAL_SetHandler( SIGINT, (void (*)())SIGNAL_break, 1);
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SIGNAL_SetHandler( SIGSEGV, (void (*)())SIGNAL_fault, 1);
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SIGNAL_SetHandler( SIGILL, (void (*)())SIGNAL_fault, 1);
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SIGNAL_SetHandler( SIGFPE, (void (*)())SIGNAL_fault, 1);
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SIGNAL_SetHandler( SIGTRAP, (void (*)())SIGNAL_trap, 1); /* debugger */
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SIGNAL_SetHandler( SIGHUP, (void (*)())SIGNAL_trap, 1); /* forced break*/
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#ifdef SIGBUS
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SIGNAL_SetHandler( SIGBUS, (void (*)())SIGNAL_fault, 1);
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#endif
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instr_emu_call = INSTR_EmulateInstruction;
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return TRUE;
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}
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