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282b13bcdc
wine/dlls/ntdll/signal_i386.c
Patrik Stridvall 282b13bcdc Solaris compile fix.
1999-10-24 21:29:48 +00:00

718 lines
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/*
* i386 signal handling routines
*
* Copyright 1999 Alexandre Julliard
*/
#ifdef __i386__
#include "config.h"
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYSCALL_H
# include <syscall.h>
#else
# ifdef HAVE_SYS_SYSCALL_H
# include <sys/syscall.h>
# endif
#endif
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
typedef struct
{
unsigned short sc_gs, __gsh;
unsigned short sc_fs, __fsh;
unsigned short sc_es, __esh;
unsigned short sc_ds, __dsh;
unsigned long sc_edi;
unsigned long sc_esi;
unsigned long sc_ebp;
unsigned long sc_esp;
unsigned long sc_ebx;
unsigned long sc_edx;
unsigned long sc_ecx;
unsigned long sc_eax;
unsigned long sc_trapno;
unsigned long sc_err;
unsigned long sc_eip;
unsigned short sc_cs, __csh;
unsigned long sc_eflags;
unsigned long esp_at_signal;
unsigned short sc_ss, __ssh;
unsigned long i387;
unsigned long oldmask;
unsigned long cr2;
} SIGCONTEXT;
#define HANDLER_DEF(name) void name( int __signal, SIGCONTEXT __context )
#define HANDLER_CONTEXT (&__context)
/* this is the sigaction structure from the Linux 2.1.20 kernel. */
#undef sa_handler
struct kernel_sigaction
{
void (*sa_handler)();
unsigned long sa_mask;
unsigned long sa_flags;
void *sa_restorer;
};
/* Similar to the sigaction function in libc, except it leaves alone the
restorer field, which is used to specify the signal stack address */
static inline int wine_sigaction( int sig, struct kernel_sigaction *new,
struct kernel_sigaction *old )
{
__asm__ __volatile__( "pushl %%ebx\n\t"
"movl %2,%%ebx\n\t"
"int $0x80\n\t"
"popl %%ebx"
: "=a" (sig)
: "0" (SYS_sigaction), "r" (sig), "c" (new), "d" (old) );
if (sig>=0) return 0;
errno = -sig;
return -1;
}
#endif /* linux */
#ifdef BSDI
#define EAX_sig(context) ((context)->tf_eax)
#define EBX_sig(context) ((context)->tf_ebx)
#define ECX_sig(context) ((context)->tf_ecx)
#define EDX_sig(context) ((context)->tf_edx)
#define ESI_sig(context) ((context)->tf_esi)
#define EDI_sig(context) ((context)->tf_edi)
#define EBP_sig(context) ((context)->tf_ebp)
#define CS_sig(context) ((context)->tf_cs)
#define DS_sig(context) ((context)->tf_ds)
#define ES_sig(context) ((context)->tf_es)
#define SS_sig(context) ((context)->tf_ss)
#include <machine/frame.h>
typedef struct trapframe SIGCONTEXT;
#define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
#define HANDLER_CONTEXT __context
#define EFL_sig(context) ((context)->tf_eflags)
#define EIP_sig(context) (*((unsigned long*)&(context)->tf_eip))
#define ESP_sig(context) (*((unsigned long*)&(context)->tf_esp))
#endif /* bsdi */
#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
#include <signal.h>
typedef struct sigcontext SIGCONTEXT;
#define HANDLER_DEF(name) void name( int __signal, int code, SIGCONTEXT *__context )
#define HANDLER_CONTEXT __context
#endif /* FreeBSD */
#if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
#include <signal.h>
#ifdef _SCO_DS
#include <sys/regset.h>
#endif
/* Solaris kludge */
#undef ERR
#include <sys/ucontext.h>
#undef ERR
typedef struct ucontext SIGCONTEXT;
#define HANDLER_DEF(name) void name( int __signal, void *__siginfo, SIGCONTEXT *__context )
#define HANDLER_CONTEXT __context
#endif /* svr4 || SCO_DS */
#ifdef __EMX__
typedef struct
{
unsigned long ContextFlags;
FLOATING_SAVE_AREA sc_float;
unsigned long sc_gs;
unsigned long sc_fs;
unsigned long sc_es;
unsigned long sc_ds;
unsigned long sc_edi;
unsigned long sc_esi;
unsigned long sc_eax;
unsigned long sc_ebx;
unsigned long sc_ecx;
unsigned long sc_edx;
unsigned long sc_ebp;
unsigned long sc_eip;
unsigned long sc_cs;
unsigned long sc_eflags;
unsigned long sc_esp;
unsigned long sc_ss;
} SIGCONTEXT;
#endif /* __EMX__ */
#if defined(linux) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__EMX__)
#define EAX_sig(context) ((context)->sc_eax)
#define EBX_sig(context) ((context)->sc_ebx)
#define ECX_sig(context) ((context)->sc_ecx)
#define EDX_sig(context) ((context)->sc_edx)
#define ESI_sig(context) ((context)->sc_esi)
#define EDI_sig(context) ((context)->sc_edi)
#define EBP_sig(context) ((context)->sc_ebp)
#define CS_sig(context) ((context)->sc_cs)
#define DS_sig(context) ((context)->sc_ds)
#define ES_sig(context) ((context)->sc_es)
#define SS_sig(context) ((context)->sc_ss)
#ifdef linux
/* FS and GS are now in the sigcontext struct of FreeBSD, but not
* saved by the exception handling. duh.
*/
#define FS_sig(context) ((context)->sc_fs)
#define GS_sig(context) ((context)->sc_gs)
#define CR2_sig(context) ((context)->cr2)
#define TRAP_sig(context) ((context)->sc_trapno)
#define ERROR_sig(context) ((context)->sc_err)
#define FPU_sig(context) ((FLOATING_SAVE_AREA*)((context)->i387))
#endif
#ifndef __FreeBSD__
#define EFL_sig(context) ((context)->sc_eflags)
#else
#define EFL_sig(context) ((context)->sc_efl)
/* FreeBSD, see i386/i386/traps.c::trap_pfault va->err kludge */
#define CR2_sig(context) ((context)->sc_err)
#define TRAP_sig(context) ((context)->sc_trapno)
#endif
#define EIP_sig(context) (*((unsigned long*)&(context)->sc_eip))
#define ESP_sig(context) (*((unsigned long*)&(context)->sc_esp))
#endif /* linux || __NetBSD__ || __FreeBSD__ || __OpenBSD__ */
#if defined(__svr4__) || defined(_SCO_DS) || defined(__sun)
#ifdef _SCO_DS
#define gregs regs
#endif
#define EAX_sig(context) ((context)->uc_mcontext.gregs[EAX])
#define EBX_sig(context) ((context)->uc_mcontext.gregs[EBX])
#define ECX_sig(context) ((context)->uc_mcontext.gregs[ECX])
#define EDX_sig(context) ((context)->uc_mcontext.gregs[EDX])
#define ESI_sig(context) ((context)->uc_mcontext.gregs[ESI])
#define EDI_sig(context) ((context)->uc_mcontext.gregs[EDI])
#define EBP_sig(context) ((context)->uc_mcontext.gregs[EBP])
#define CS_sig(context) ((context)->uc_mcontext.gregs[CS])
#define DS_sig(context) ((context)->uc_mcontext.gregs[DS])
#define ES_sig(context) ((context)->uc_mcontext.gregs[ES])
#define SS_sig(context) ((context)->uc_mcontext.gregs[SS])
#define FS_sig(context) ((context)->uc_mcontext.gregs[FS])
#define GS_sig(context) ((context)->uc_mcontext.gregs[GS])
#define EFL_sig(context) ((context)->uc_mcontext.gregs[EFL])
#define EIP_sig(context) ((context)->uc_mcontext.gregs[EIP])
#ifdef R_ESP
#define ESP_sig(context) ((context)->uc_mcontext.gregs[R_ESP])
#else
#define ESP_sig(context) ((context)->uc_mcontext.gregs[ESP])
#endif
#ifdef TRAPNO
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[TRAPNO])
#endif
#endif /* svr4 || SCO_DS */
/* exception code definitions (already defined by FreeBSD) */
#ifndef __FreeBSD__ /* FIXME: other BSDs? */
#define T_DIVIDE 0 /* Division by zero exception */
#define T_TRCTRAP 1 /* Single-step exception */
#define T_NMI 2 /* NMI interrupt */
#define T_BPTFLT 3 /* Breakpoint exception */
#define T_OFLOW 4 /* Overflow exception */
#define T_BOUND 5 /* Bound range exception */
#define T_PRIVINFLT 6 /* Invalid opcode exception */
#define T_DNA 7 /* Device not available exception */
#define T_DOUBLEFLT 8 /* Double fault exception */
#define T_FPOPFLT 9 /* Coprocessor segment overrun */
#define T_TSSFLT 10 /* Invalid TSS exception */
#define T_SEGNPFLT 11 /* Segment not present exception */
#define T_STKFLT 12 /* Stack fault */
#define T_PROTFLT 13 /* General protection fault */
#define T_PAGEFLT 14 /* Page fault */
#define T_RESERVED 15 /* Unknown exception */
#define T_ARITHTRAP 16 /* Floating point exception */
#define T_ALIGNFLT 17 /* Alignment check exception */
#define T_MCHK 18 /* Machine check exception */
#define T_CACHEFLT 19 /* Cache flush exception */
#endif
#define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
#include "winnt.h"
#include "stackframe.h"
#include "global.h"
#include "miscemu.h"
#include "ntddk.h"
#include "syslevel.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(seh)
extern void WINAPI REGS_FUNC(RtlRaiseException)( EXCEPTION_RECORD *rec, CONTEXT *context );
/***********************************************************************
* handler_init
*
* Initialization code for a signal handler.
* Restores the proper %fs value for the current thread.
*/
static inline void handler_init( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
WORD fs;
/* get %fs at time of the fault */
#ifdef FS_sig
fs = FS_sig(sigcontext);
#else
GET_FS(fs);
#endif
context->SegFs = fs;
/* now restore a proper %fs for the fault handler */
if (!IS_SELECTOR_SYSTEM(CS_sig(sigcontext))) fs = SYSLEVEL_Win16CurrentTeb;
if (!fs) fs = SYSLEVEL_EmergencyTeb;
SET_FS(fs);
}
/***********************************************************************
* get_trap_code
*
* Get the trap code for a signal.
*/
static inline int get_trap_code( const SIGCONTEXT *sigcontext )
{
#ifdef TRAP_sig
return TRAP_sig(sigcontext);
#else
return T_UNKNOWN; /* unknown trap code */
#endif
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
context->Eax = EAX_sig(sigcontext);
context->Ebx = EBX_sig(sigcontext);
context->Ecx = ECX_sig(sigcontext);
context->Edx = EDX_sig(sigcontext);
context->Esi = ESI_sig(sigcontext);
context->Edi = EDI_sig(sigcontext);
context->Ebp = EBP_sig(sigcontext);
context->EFlags = EFL_sig(sigcontext);
context->Eip = EIP_sig(sigcontext);
context->Esp = ESP_sig(sigcontext);
context->SegCs = LOWORD(CS_sig(sigcontext));
context->SegDs = LOWORD(DS_sig(sigcontext));
context->SegEs = LOWORD(ES_sig(sigcontext));
context->SegSs = LOWORD(SS_sig(sigcontext));
/* %fs already handled in handler_init */
#ifdef GS_sig
context->SegGs = LOWORD(GS_sig(sigcontext));
#else
GET_GS( context->SegGs );
context->SegGs &= 0xffff;
#endif
if (ISV86(context)) V86BASE(context) = (DWORD)DOSMEM_MemoryBase(0);
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
{
EAX_sig(sigcontext) = context->Eax;
EBX_sig(sigcontext) = context->Ebx;
ECX_sig(sigcontext) = context->Ecx;
EDX_sig(sigcontext) = context->Edx;
ESI_sig(sigcontext) = context->Esi;
EDI_sig(sigcontext) = context->Edi;
EBP_sig(sigcontext) = context->Ebp;
EFL_sig(sigcontext) = context->EFlags;
EIP_sig(sigcontext) = context->Eip;
ESP_sig(sigcontext) = context->Esp;
CS_sig(sigcontext) = context->SegCs;
DS_sig(sigcontext) = context->SegDs;
ES_sig(sigcontext) = context->SegEs;
SS_sig(sigcontext) = context->SegSs;
#ifdef FS_sig
FS_sig(sigcontext) = context->SegFs;
#else
SET_FS( context->SegFs );
#endif
#ifdef GS_sig
GS_sig(sigcontext) = context->SegGs;
#else
SET_GS( context->SegGs );
#endif
}
/***********************************************************************
* save_fpu
*
* Set the FPU context from a sigcontext.
*/
static void inline save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
#ifdef FPU_sig
if (FPU_sig(sigcontext))
{
context->FloatSave = *FPU_sig(sigcontext);
return;
}
#endif /* FPU_sig */
#ifdef __GNUC__
__asm__ __volatile__( "fnsave %0; fwait" : "=m" (context->FloatSave) );
#endif /* __GNUC__ */
}
/***********************************************************************
* restore_fpu
*
* Restore the FPU context to a sigcontext.
*/
static void inline restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
#ifdef FPU_sig
if (FPU_sig(sigcontext))
{
*FPU_sig(sigcontext) = context->FloatSave;
return;
}
#endif /* FPU_sig */
#ifdef __GNUC__
/* avoid nested exceptions */
context->FloatSave.StatusWord &= context->FloatSave.ControlWord | 0xffffff80;
__asm__ __volatile__( "frstor %0; fwait" : : "m" (context->FloatSave) );
#endif /* __GNUC__ */
}
/**********************************************************************
* get_fpu_code
*
* Get the FPU exception code from the FPU status.
*/
static inline DWORD get_fpu_code( const CONTEXT *context )
{
DWORD status = context->FloatSave.StatusWord;
if (status & 0x01) /* IE */
{
if (status & 0x40) /* SF */
return EXCEPTION_FLT_STACK_CHECK;
else
return EXCEPTION_FLT_INVALID_OPERATION;
}
if (status & 0x02) return EXCEPTION_FLT_DENORMAL_OPERAND; /* DE flag */
if (status & 0x04) return EXCEPTION_FLT_DIVIDE_BY_ZERO; /* ZE flag */
if (status & 0x08) return EXCEPTION_FLT_OVERFLOW; /* OE flag */
if (status & 0x10) return EXCEPTION_FLT_UNDERFLOW; /* UE flag */
if (status & 0x20) return EXCEPTION_FLT_INEXACT_RESULT; /* PE flag */
return EXCEPTION_FLT_INVALID_OPERATION; /* generic error */
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static HANDLER_DEF(segv_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
handler_init( &context, HANDLER_CONTEXT );
#ifdef CR2_sig
/* we want the page-fault case to be fast */
if (get_trap_code(HANDLER_CONTEXT) == T_PAGEFLT)
if (VIRTUAL_HandleFault( (LPVOID)CR2_sig(HANDLER_CONTEXT) )) return;
#endif
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionRecord = NULL;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionAddress = (LPVOID)context.Eip;
rec.NumberParameters = 0;
switch(get_trap_code(HANDLER_CONTEXT))
{
case T_OFLOW: /* Overflow exception */
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
case T_BOUND: /* Bound range exception */
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
case T_PRIVINFLT: /* Invalid opcode exception */
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case T_STKFLT: /* Stack fault */
rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
break;
case T_SEGNPFLT: /* Segment not present exception */
case T_PROTFLT: /* General protection fault */
case T_UNKNOWN: /* Unknown fault code */
if (INSTR_EmulateInstruction( &context )) goto restore;
rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
break;
case T_PAGEFLT: /* Page fault */
#ifdef CR2_sig
rec.NumberParameters = 2;
#ifdef ERROR_sig
rec.ExceptionInformation[0] = (ERROR_sig(HANDLER_CONTEXT) & 2) != 0;
#else
rec.ExceptionInformation[0] = 0;
#endif /* ERROR_sig */
rec.ExceptionInformation[1] = CR2_sig(HANDLER_CONTEXT);
#endif /* CR2_sig */
rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
break;
case T_ALIGNFLT: /* Alignment check exception */
/* FIXME: pass through exception handler first? */
if (context.EFlags & 0x00040000)
{
/* Disable AC flag, return */
context.EFlags &= ~0x00040000;
goto restore;
}
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
default:
ERR( "Got unexpected trap %d\n", get_trap_code(HANDLER_CONTEXT) );
/* fall through */
case T_NMI: /* NMI interrupt */
case T_DNA: /* Device not available exception */
case T_DOUBLEFLT: /* Double fault exception */
case T_TSSFLT: /* Invalid TSS exception */
case T_RESERVED: /* Unknown exception */
case T_MCHK: /* Machine check exception */
#ifdef T_CACHEFLT
case T_CACHEFLT: /* Cache flush exception */
#endif
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
REGS_FUNC(RtlRaiseException)( &rec, &context );
restore:
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static HANDLER_DEF(trap_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
handler_init( &context, HANDLER_CONTEXT );
switch(get_trap_code(HANDLER_CONTEXT))
{
case T_TRCTRAP: /* Single-step exception */
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
case T_BPTFLT: /* Breakpoint exception */
default:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
break;
}
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Eip;
rec.NumberParameters = 0;
REGS_FUNC(RtlRaiseException)( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static HANDLER_DEF(fpe_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
handler_init( &context, HANDLER_CONTEXT );
save_fpu( &context, HANDLER_CONTEXT );
switch(get_trap_code(HANDLER_CONTEXT))
{
case T_DIVIDE: /* Division by zero exception */
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
case T_FPOPFLT: /* Coprocessor segment overrun */
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
case T_ARITHTRAP: /* Floating point exception */
case T_UNKNOWN: /* Unknown fault code */
rec.ExceptionCode = get_fpu_code( &context );
break;
default:
ERR( "Got unexpected trap %d\n", get_trap_code(HANDLER_CONTEXT) );
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Eip;
rec.NumberParameters = 0;
REGS_FUNC(RtlRaiseException)( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
restore_fpu( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static HANDLER_DEF(int_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
handler_init( &context, HANDLER_CONTEXT );
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionCode = CONTROL_C_EXIT;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Eip;
rec.NumberParameters = 0;
REGS_FUNC(RtlRaiseException)( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
}
/***********************************************************************
* set_handler
*
* Set a signal handler
*/
static int set_handler( int sig, void (*func)() )
{
#ifdef linux
struct kernel_sigaction sig_act;
sig_act.sa_handler = func;
sig_act.sa_flags = SA_RESTART | SA_NOMASK;
sig_act.sa_mask = 0;
/* point to the top of the stack */
sig_act.sa_restorer = (char *)NtCurrentTeb()->signal_stack + SIGNAL_STACK_SIZE;
return wine_sigaction( sig, &sig_act, NULL );
#else /* linux */
struct sigaction sig_act;
sig_act.sa_handler = func;
sigemptyset( &sig_act.sa_mask );
# if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__)
sig_act.sa_flags = SA_ONSTACK;
# elif defined (__svr4__) || defined(_SCO_DS)
sig_act.sa_flags = SA_SIGINFO | SA_ONSTACK | SA_RESTART;
# elif defined(__EMX__)
sig_act.sa_flags = 0; /* FIXME: EMX has only SA_ACK and SA_SYSV */
# else
sig_act.sa_flags = 0;
# endif
return sigaction( sig, &sig_act, NULL );
#endif /* linux */
}
/**********************************************************************
* SIGNAL_Init
*/
BOOL SIGNAL_Init(void)
{
#ifdef HAVE_WORKING_SIGALTSTACK
struct sigaltstack ss;
if ((ss.ss_sp = NtCurrentTeb()->signal_stack))
{
ss.ss_size = SIGNAL_STACK_SIZE;
ss.ss_flags = 0;
if (sigaltstack(&ss, NULL) < 0)
{
perror("sigaltstack");
/* fall through on error and try it differently */
}
}
#endif /* HAVE_SIGALTSTACK */
/* ignore SIGPIPE so that WINSOCK can get a EPIPE error instead */
signal( SIGPIPE, SIG_IGN );
/* automatic child reaping to avoid zombies */
signal( SIGCHLD, SIG_IGN );
if (set_handler( SIGINT, (void (*)())int_handler ) == -1) goto error;
if (set_handler( SIGFPE, (void (*)())fpe_handler ) == -1) goto error;
if (set_handler( SIGSEGV, (void (*)())segv_handler ) == -1) goto error;
if (set_handler( SIGILL, (void (*)())segv_handler ) == -1) goto error;
#ifdef SIGBUS
if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
#endif
#ifdef SIGTRAP
if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
#endif
return TRUE;
error:
perror("sigaction");
return FALSE;
}
#endif /* __i386__ */
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