wine/dlls/ntdll/signal_powerpc.c

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/*
* PowerPC signal handling routines
*
* Copyright 2002 Marcus Meissner, SuSE Linux AG
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef __powerpc__
#include "config.h"
#include "wine/port.h"
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
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#include <stdio.h>
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#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
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#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
#ifdef HAVE_SYS_VM86_H
# include <sys/vm86.h>
#endif
#ifdef HAVE_SYS_SIGNAL_H
# include <sys/signal.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winternl.h"
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#include "wine/library.h"
#include "wine/exception.h"
#include "ntdll_misc.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
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/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
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typedef struct ucontext SIGCONTEXT;
# define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
# define HANDLER_CONTEXT (__context)
/* All Registers access - only for local access */
# define REG_sig(reg_name, context) ((context)->uc_mcontext.regs->reg_name)
/* Gpr Registers access */
# define GPR_sig(reg_num, context) REG_sig(gpr[reg_num], context)
# define IAR_sig(context) REG_sig(nip, context) /* Program counter */
# define MSR_sig(context) REG_sig(msr, context) /* Machine State Register (Supervisor) */
# define CTR_sig(context) REG_sig(ctr, context) /* Count register */
# define XER_sig(context) REG_sig(xer, context) /* User's integer exception register */
# define LR_sig(context) REG_sig(link, context) /* Link register */
# define CR_sig(context) REG_sig(ccr, context) /* Condition register */
/* Float Registers access */
# define FLOAT_sig(reg_num, context) (((double*)((char*)((context)->uc_mcontext.regs+48*4)))[reg_num])
# define FPSCR_sig(context) (*(int*)((char*)((context)->uc_mcontext.regs+(48+32*2)*4)))
/* Exception Registers access */
# define DAR_sig(context) REG_sig(dar, context)
# define DSISR_sig(context) REG_sig(dsisr, context)
# define TRAP_sig(context) REG_sig(trap, context)
#endif /* linux */
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#ifdef __APPLE__
# include <sys/ucontext.h>
# include <sys/types.h>
# include <signal.h>
typedef siginfo_t siginfo;
typedef struct ucontext SIGCONTEXT;
# define HANDLER_DEF(name) void name( int __signal, siginfo *__siginfo, SIGCONTEXT *__context )
# define HANDLER_CONTEXT (__context)
/* All Registers access - only for local access */
# define REG_sig(reg_name, context) ((context)->uc_mcontext->ss.reg_name)
# define FLOATREG_sig(reg_name, context) ((context)->uc_mcontext->fs.reg_name)
# define EXCEPREG_sig(reg_name, context) ((context)->uc_mcontext->es.reg_name)
# define VECREG_sig(reg_name, context) ((context)->uc_mcontext->vs.reg_name)
/* Gpr Registers access */
# define GPR_sig(reg_num, context) REG_sig(r##reg_num, context)
# define IAR_sig(context) REG_sig(srr0, context) /* Program counter */
# define MSR_sig(context) REG_sig(srr1, context) /* Machine State Register (Supervisor) */
# define CTR_sig(context) REG_sig(ctr, context)
# define XER_sig(context) REG_sig(xer, context) /* Link register */
# define LR_sig(context) REG_sig(lr, context) /* User's integer exception register */
# define CR_sig(context) REG_sig(cr, context) /* Condition register */
/* Float Registers access */
# define FLOAT_sig(reg_num, context) FLOATREG_sig(fpregs[reg_num], context)
# define FPSCR_sig(context) ((double)FLOATREG_sig(fpscr, context))
/* Exception Registers access */
# define DAR_sig(context) EXCEPREG_sig(dar, context) /* Fault registers for coredump */
# define DSISR_sig(context) EXCEPREG_sig(dsisr, context)
# define TRAP_sig(context) EXCEPREG_sig(exception, context) /* number of powerpc exception taken */
/* Signal defs : Those are undefined on darwin
SIGBUS
#undef BUS_ADRERR
#undef BUS_OBJERR
SIGILL
#undef ILL_ILLOPN
#undef ILL_ILLTRP
#undef ILL_ILLADR
#undef ILL_COPROC
#undef ILL_PRVREG
#undef ILL_BADSTK
SIGTRAP
#undef TRAP_BRKPT
#undef TRAP_TRACE
SIGFPE
*/
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#endif /* __APPLE__ */
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typedef int (*wine_signal_handler)(unsigned int sig);
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static wine_signal_handler handlers[256];
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extern void WINAPI EXC_RtlRaiseException( PEXCEPTION_RECORD, PCONTEXT );
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/***********************************************************************
* dispatch_signal
*/
inline static int dispatch_signal(unsigned int sig)
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{
if (handlers[sig] == NULL) return 0;
return handlers[sig](sig);
}
/***********************************************************************
* save_context
*
* Set the register values from a sigcontext.
*/
static void save_context( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
#define C(x) context->Gpr##x = GPR_sig(x,sigcontext)
/* Save Gpr registers */
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C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
C(31);
#undef C
context->Iar = IAR_sig(sigcontext); /* Program Counter */
context->Msr = MSR_sig(sigcontext); /* Machine State Register (Supervisor) */
context->Ctr = CTR_sig(sigcontext);
context->Xer = XER_sig(sigcontext);
context->Lr = LR_sig(sigcontext);
context->Cr = CR_sig(sigcontext);
/* Saving Exception regs */
context->Dar = DAR_sig(sigcontext);
context->Dsisr = DSISR_sig(sigcontext);
context->Trap = TRAP_sig(sigcontext);
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}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
{
#define C(x) GPR_sig(x,sigcontext) = context->Gpr##x
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C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
C(31);
#undef C
IAR_sig(sigcontext) = context->Iar; /* Program Counter */
MSR_sig(sigcontext) = context->Msr; /* Machine State Register (Supervisor) */
CTR_sig(sigcontext) = context->Ctr;
XER_sig(sigcontext) = context->Xer;
LR_sig(sigcontext) = context->Lr;
CR_sig(sigcontext) = context->Cr;
/* Setting Exception regs */
DAR_sig(sigcontext) = context->Dar;
DSISR_sig(sigcontext) = context->Dsisr;
TRAP_sig(sigcontext) = context->Trap;
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}
/***********************************************************************
* save_fpu
*
* Set the FPU context from a sigcontext.
*/
inline static void save_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
#define C(x) context->Fpr##x = FLOAT_sig(x,sigcontext)
C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
C(31);
#undef C
context->Fpscr = FPSCR_sig(sigcontext);
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}
/***********************************************************************
* restore_fpu
*
* Restore the FPU context to a sigcontext.
*/
inline static void restore_fpu( CONTEXT *context, const SIGCONTEXT *sigcontext )
{
#define C(x) FLOAT_sig(x,sigcontext) = context->Fpr##x
C(0); C(1); C(2); C(3); C(4); C(5); C(6); C(7); C(8); C(9); C(10);
C(11); C(12); C(13); C(14); C(15); C(16); C(17); C(18); C(19); C(20);
C(21); C(22); C(23); C(24); C(25); C(26); C(27); C(28); C(29); C(30);
C(31);
#undef C
FPSCR_sig(sigcontext) = context->Fpscr;
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}
/**********************************************************************
* get_fpu_code
*
* Get the FPU exception code from the FPU status.
*/
static inline DWORD get_fpu_code( const CONTEXT *context )
{
DWORD status = context->Fpscr;
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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 */
}
/**********************************************************************
* do_segv
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*
* Implementation of SIGSEGV handler.
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*/
static void do_segv( CONTEXT *context, int trap, int err, int code, void * addr )
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{
EXCEPTION_RECORD rec;
DWORD page_fault_code = EXCEPTION_ACCESS_VIOLATION;
rec.ExceptionRecord = NULL;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionAddress = addr;
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rec.NumberParameters = 0;
switch (trap) {
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case SIGSEGV:
switch ( code & 0xffff ) {
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case SEGV_MAPERR:
case SEGV_ACCERR:
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = 0; /* FIXME ? */
rec.ExceptionInformation[1] = (DWORD)addr;
if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
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return;
rec.ExceptionCode = page_fault_code;
break;
default:FIXME("Unhandled SIGSEGV/%x\n",code);
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break;
}
break;
case SIGBUS:
switch ( code & 0xffff ) {
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case BUS_ADRALN:
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
#ifdef BUS_ADRERR
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case BUS_ADRERR:
#endif
#ifdef BUS_OBJERR
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case BUS_OBJERR:
/* FIXME: correct for all cases ? */
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = 0; /* FIXME ? */
rec.ExceptionInformation[1] = (DWORD)addr;
if (!(page_fault_code=VIRTUAL_HandleFault(addr)))
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return;
rec.ExceptionCode = page_fault_code;
break;
#endif
default:FIXME("Unhandled SIGBUS/%x\n",code);
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break;
}
break;
case SIGILL:
switch ( code & 0xffff ) {
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case ILL_ILLOPC: /* illegal opcode */
#ifdef ILL_ILLOPN
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case ILL_ILLOPN: /* illegal operand */
#endif
#ifdef ILL_ILLADR
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case ILL_ILLADR: /* illegal addressing mode */
#endif
#ifdef ILL_ILLTRP
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case ILL_ILLTRP: /* illegal trap */
#endif
#ifdef ILL_COPROC
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case ILL_COPROC: /* coprocessor error */
#endif
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rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
case ILL_PRVOPC: /* privileged opcode */
#ifdef ILL_PRVREG
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case ILL_PRVREG: /* privileged register */
#endif
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rec.ExceptionCode = EXCEPTION_PRIV_INSTRUCTION;
break;
#ifdef ILL_BADSTK
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case ILL_BADSTK: /* internal stack error */
rec.ExceptionCode = EXCEPTION_STACK_OVERFLOW;
break;
#endif
default:FIXME("Unhandled SIGILL/%x\n", code);
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break;
}
break;
}
EXC_RtlRaiseException( &rec, context );
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}
/**********************************************************************
* do_trap
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*
* Implementation of SIGTRAP handler.
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*/
static void do_trap( CONTEXT *context, int code, void * addr )
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{
EXCEPTION_RECORD rec;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = addr;
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rec.NumberParameters = 0;
/* FIXME: check if we might need to modify PC */
switch (code & 0xffff) {
#ifdef TRAP_BRKPT
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case TRAP_BRKPT:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
break;
#endif
#ifdef TRAP_TRACE
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case TRAP_TRACE:
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
break;
#endif
default:FIXME("Unhandled SIGTRAP/%x\n", code);
break;
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}
EXC_RtlRaiseException( &rec, context );
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}
/**********************************************************************
* do_trap
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*
* Implementation of SIGFPE handler.
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*/
static void do_fpe( CONTEXT *context, int code, void * addr )
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{
EXCEPTION_RECORD rec;
switch ( code & 0xffff ) {
#ifdef FPE_FLTSUB
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case FPE_FLTSUB:
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
#endif
#ifdef FPE_INTDIV
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case FPE_INTDIV:
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_INTOVF
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case FPE_INTOVF:
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTDIV
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case FPE_FLTDIV:
rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
break;
#endif
#ifdef FPE_FLTOVF
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case FPE_FLTOVF:
rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
break;
#endif
#ifdef FPE_FLTUND
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case FPE_FLTUND:
rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
break;
#endif
#ifdef FPE_FLTRES
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case FPE_FLTRES:
rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
break;
#endif
#ifdef FPE_FLTINV
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case FPE_FLTINV:
#endif
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default:
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = addr;
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rec.NumberParameters = 0;
EXC_RtlRaiseException( &rec, context );
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static HANDLER_DEF(segv_handler)
{
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
do_segv( &context, __siginfo->si_signo, __siginfo->si_errno, __siginfo->si_code, __siginfo->si_addr );
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static HANDLER_DEF(trap_handler)
{
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
do_trap( &context, __siginfo->si_code, __siginfo->si_addr );
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restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static HANDLER_DEF(fpe_handler)
{
CONTEXT context;
save_fpu( &context, HANDLER_CONTEXT );
save_context( &context, HANDLER_CONTEXT );
do_fpe( &context, __siginfo->si_code, __siginfo->si_addr );
restore_context( &context, HANDLER_CONTEXT );
restore_fpu( &context, HANDLER_CONTEXT );
}
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/**********************************************************************
* int_handler
*
* Handler for SIGINT.
*/
static HANDLER_DEF(int_handler)
{
if (!dispatch_signal(SIGINT))
{
EXCEPTION_RECORD rec;
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionCode = CONTROL_C_EXIT;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Iar;
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rec.NumberParameters = 0;
EXC_RtlRaiseException( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
}
}
/**********************************************************************
* abrt_handler
*
* Handler for SIGABRT.
*/
static HANDLER_DEF(abrt_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionCode = EXCEPTION_WINE_ASSERTION;
rec.ExceptionFlags = EH_NONCONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Iar;
rec.NumberParameters = 0;
EXC_RtlRaiseException( &rec, &context ); /* Should never return.. */
restore_context( &context, HANDLER_CONTEXT );
}
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/**********************************************************************
* term_handler
*
* Handler for SIGTERM.
*/
static HANDLER_DEF(term_handler)
{
server_abort_thread(0);
}
/**********************************************************************
* usr1_handler
*
* Handler for SIGUSR1, used to signal a thread that it got suspended.
*/
static HANDLER_DEF(usr1_handler)
{
LARGE_INTEGER timeout;
/* wait with 0 timeout, will only return once the thread is no longer suspended */
timeout.QuadPart = 0;
NTDLL_wait_for_multiple_objects( 0, NULL, 0, &timeout );
}
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/***********************************************************************
* set_handler
*
* Set a signal handler
*/
static int set_handler( int sig, void (*func)() )
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{
struct sigaction sig_act;
sig_act.sa_sigaction = func;
sigemptyset( &sig_act.sa_mask );
sigaddset( &sig_act.sa_mask, SIGINT );
sigaddset( &sig_act.sa_mask, SIGALRM );
sig_act.sa_flags = SA_RESTART | SA_SIGINFO;
return sigaction( sig, &sig_act, NULL );
}
/***********************************************************************
* __wine_set_signal_handler (NTDLL.@)
*/
int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
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{
if (sig > sizeof(handlers) / sizeof(handlers[0])) return -1;
if (handlers[sig] != NULL) return -2;
handlers[sig] = wsh;
return 0;
}
/**********************************************************************
* SIGNAL_Init
*/
BOOL SIGNAL_Init(void)
{
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;
if (set_handler( SIGABRT, (void (*)())abrt_handler ) == -1) goto error;
if (set_handler( SIGTERM, (void (*)())term_handler ) == -1) goto error;
if (set_handler( SIGUSR1, (void (*)())usr1_handler ) == -1) goto error;
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#ifdef SIGBUS
if (set_handler( SIGBUS, (void (*)())segv_handler ) == -1) goto error;
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#endif
#ifdef SIGTRAP
if (set_handler( SIGTRAP, (void (*)())trap_handler ) == -1) goto error;
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#endif
return TRUE;
error:
perror("sigaction");
return FALSE;
}
/**********************************************************************
* __wine_enter_vm86 (NTDLL.@)
*/
void __wine_enter_vm86( CONTEXT *context )
{
MESSAGE("vm86 mode not supported on this platform\n");
}
/**********************************************************************
* DbgBreakPoint (NTDLL.@)
*/
void WINAPI DbgBreakPoint(void)
{
kill(getpid(), SIGTRAP);
}
/**********************************************************************
* DbgUserBreakPoint (NTDLL.@)
*/
void WINAPI DbgUserBreakPoint(void)
{
kill(getpid(), SIGTRAP);
}
#endif /* __powerpc__ */