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Sweden-Number/dlls/ntdll/signal_x86_64.c

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/*
* x86-64 signal handling routines
*
* Copyright 1999, 2005 Alexandre Julliard
*
* 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 __x86_64__
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif
#ifdef HAVE_SYS_SIGNAL_H
# include <sys/signal.h>
#endif
#define NONAMELESSUNION
#include "windef.h"
#include "winternl.h"
#include "wine/library.h"
#include "wine/exception.h"
#include "ntdll_misc.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
/***********************************************************************
* signal context platform-specific definitions
*/
#ifdef linux
typedef struct ucontext SIGCONTEXT;
# define HANDLER_DEF(name) void name( int __signal, struct siginfo *__siginfo, SIGCONTEXT *__context )
# define HANDLER_CONTEXT (__context)
#define RAX_sig(context) ((context)->uc_mcontext.gregs[REG_RAX])
#define RBX_sig(context) ((context)->uc_mcontext.gregs[REG_RBX])
#define RCX_sig(context) ((context)->uc_mcontext.gregs[REG_RCX])
#define RDX_sig(context) ((context)->uc_mcontext.gregs[REG_RDX])
#define RSI_sig(context) ((context)->uc_mcontext.gregs[REG_RSI])
#define RDI_sig(context) ((context)->uc_mcontext.gregs[REG_RDI])
#define RBP_sig(context) ((context)->uc_mcontext.gregs[REG_RBP])
#define R8_sig(context) ((context)->uc_mcontext.gregs[REG_R8])
#define R9_sig(context) ((context)->uc_mcontext.gregs[REG_R9])
#define R10_sig(context) ((context)->uc_mcontext.gregs[REG_R10])
#define R11_sig(context) ((context)->uc_mcontext.gregs[REG_R11])
#define R12_sig(context) ((context)->uc_mcontext.gregs[REG_R12])
#define R13_sig(context) ((context)->uc_mcontext.gregs[REG_R13])
#define R14_sig(context) ((context)->uc_mcontext.gregs[REG_R14])
#define R15_sig(context) ((context)->uc_mcontext.gregs[REG_R15])
#define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
#define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
#define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
#define RSP_sig(context) ((context)->uc_mcontext.gregs[REG_RSP])
#define RIP_sig(context) ((context)->uc_mcontext.gregs[REG_RIP])
#define EFL_sig(context) ((context)->uc_mcontext.gregs[REG_EFL])
#define TRAP_sig(context) ((context)->uc_mcontext.gregs[REG_TRAPNO])
#define ERROR_sig(context) ((context)->uc_mcontext.gregs[REG_ERR])
#define FPU_sig(context) ((XMM_SAVE_AREA32 *)((context)->uc_mcontext.fpregs))
#define FAULT_CODE (__siginfo->si_code)
#define FAULT_ADDRESS (__siginfo->si_addr)
#endif /* linux */
#define T_UNKNOWN (-1) /* Unknown fault (TRAP_sig not defined) */
#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 */
typedef int (*wine_signal_handler)(unsigned int sig);
static wine_signal_handler handlers[256];
/***********************************************************************
* dispatch_signal
*/
inline static int dispatch_signal(unsigned int sig)
{
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 )
{
context->Rax = RAX_sig(sigcontext);
context->Rcx = RCX_sig(sigcontext);
context->Rdx = RDX_sig(sigcontext);
context->Rbx = RBX_sig(sigcontext);
context->Rsp = RSP_sig(sigcontext);
context->Rbp = RBP_sig(sigcontext);
context->Rsi = RSI_sig(sigcontext);
context->Rdi = RDI_sig(sigcontext);
context->R8 = R8_sig(sigcontext);
context->R9 = R9_sig(sigcontext);
context->R10 = R10_sig(sigcontext);
context->R11 = R11_sig(sigcontext);
context->R12 = R12_sig(sigcontext);
context->R13 = R13_sig(sigcontext);
context->R14 = R14_sig(sigcontext);
context->R15 = R15_sig(sigcontext);
context->Rip = RIP_sig(sigcontext);
context->SegCs = CS_sig(sigcontext);
context->SegFs = FS_sig(sigcontext);
context->SegGs = GS_sig(sigcontext);
context->EFlags = EFL_sig(sigcontext);
context->SegDs = 0; /* FIXME */
context->SegEs = 0; /* FIXME */
context->SegSs = 0; /* FIXME */
context->MxCsr = 0; /* FIXME */
if (FPU_sig(sigcontext)) context->u.FltSave = *FPU_sig(sigcontext);
}
/***********************************************************************
* restore_context
*
* Build a sigcontext from the register values.
*/
static void restore_context( const CONTEXT *context, SIGCONTEXT *sigcontext )
{
RAX_sig(sigcontext) = context->Rax;
RCX_sig(sigcontext) = context->Rcx;
RDX_sig(sigcontext) = context->Rdx;
RBX_sig(sigcontext) = context->Rbx;
RSP_sig(sigcontext) = context->Rsp;
RBP_sig(sigcontext) = context->Rbp;
RSI_sig(sigcontext) = context->Rsi;
RDI_sig(sigcontext) = context->Rdi;
R8_sig(sigcontext) = context->R8;
R9_sig(sigcontext) = context->R9;
R10_sig(sigcontext) = context->R10;
R11_sig(sigcontext) = context->R11;
R12_sig(sigcontext) = context->R12;
R13_sig(sigcontext) = context->R13;
R14_sig(sigcontext) = context->R14;
R15_sig(sigcontext) = context->R15;
RIP_sig(sigcontext) = context->Rip;
CS_sig(sigcontext) = context->SegCs;
FS_sig(sigcontext) = context->SegFs;
GS_sig(sigcontext) = context->SegGs;
EFL_sig(sigcontext) = context->EFlags;
if (FPU_sig(sigcontext)) *FPU_sig(sigcontext) = context->u.FltSave;
}
/***********************************************************************
* set_cpu_context
*
* Set the new CPU context.
*/
void set_cpu_context( const CONTEXT *context )
{
FIXME("not implemented\n");
}
/**********************************************************************
* segv_handler
*
* Handler for SIGSEGV and related errors.
*/
static HANDLER_DEF(segv_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionRecord = NULL;
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionAddress = (LPVOID)context.Rip;
rec.NumberParameters = 0;
switch(TRAP_sig(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 */
rec.ExceptionCode = ERROR_sig(HANDLER_CONTEXT) ? EXCEPTION_ACCESS_VIOLATION
: EXCEPTION_PRIV_INSTRUCTION;
break;
case T_PAGEFLT: /* Page fault */
rec.ExceptionCode = EXCEPTION_ACCESS_VIOLATION;
#ifdef FAULT_ADDRESS
rec.NumberParameters = 2;
rec.ExceptionInformation[0] = (ERROR_sig(HANDLER_CONTEXT) & 2) != 0;
rec.ExceptionInformation[1] = (ULONG_PTR)FAULT_ADDRESS;
#endif
break;
case T_ALIGNFLT: /* Alignment check exception */
rec.ExceptionCode = EXCEPTION_DATATYPE_MISALIGNMENT;
break;
default:
ERR( "Got unexpected trap %ld\n", TRAP_sig(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 */
case T_CACHEFLT: /* Cache flush exception */
rec.ExceptionCode = EXCEPTION_ILLEGAL_INSTRUCTION;
break;
}
__regs_RtlRaiseException( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* trap_handler
*
* Handler for SIGTRAP.
*/
static HANDLER_DEF(trap_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Rip;
rec.NumberParameters = 0;
switch(FAULT_CODE)
{
case TRAP_TRACE: /* Single-step exception */
rec.ExceptionCode = EXCEPTION_SINGLE_STEP;
EFL_sig(HANDLER_CONTEXT) &= ~0x100; /* clear single-step flag */
break;
case TRAP_BRKPT: /* Breakpoint exception */
rec.ExceptionAddress = (char *)rec.ExceptionAddress - 1; /* back up over the int3 instruction */
/* fall through */
default:
rec.ExceptionCode = EXCEPTION_BREAKPOINT;
break;
}
__regs_RtlRaiseException( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* fpe_handler
*
* Handler for SIGFPE.
*/
static HANDLER_DEF(fpe_handler)
{
EXCEPTION_RECORD rec;
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
rec.ExceptionFlags = EXCEPTION_CONTINUABLE;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = (LPVOID)context.Rip;
rec.NumberParameters = 0;
switch (FAULT_CODE)
{
case FPE_FLTSUB:
rec.ExceptionCode = EXCEPTION_ARRAY_BOUNDS_EXCEEDED;
break;
case FPE_INTDIV:
rec.ExceptionCode = EXCEPTION_INT_DIVIDE_BY_ZERO;
break;
case FPE_INTOVF:
rec.ExceptionCode = EXCEPTION_INT_OVERFLOW;
break;
case FPE_FLTDIV:
rec.ExceptionCode = EXCEPTION_FLT_DIVIDE_BY_ZERO;
break;
case FPE_FLTOVF:
rec.ExceptionCode = EXCEPTION_FLT_OVERFLOW;
break;
case FPE_FLTUND:
rec.ExceptionCode = EXCEPTION_FLT_UNDERFLOW;
break;
case FPE_FLTRES:
rec.ExceptionCode = EXCEPTION_FLT_INEXACT_RESULT;
break;
case FPE_FLTINV:
default:
rec.ExceptionCode = EXCEPTION_FLT_INVALID_OPERATION;
break;
}
__regs_RtlRaiseException( &rec, &context );
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* 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.Rip;
rec.NumberParameters = 0;
__regs_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.Rip;
rec.NumberParameters = 0;
__regs_RtlRaiseException( &rec, &context ); /* Should never return.. */
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* 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)
{
CONTEXT context;
save_context( &context, HANDLER_CONTEXT );
wait_suspend( &context );
restore_context( &context, HANDLER_CONTEXT );
}
/**********************************************************************
* get_signal_stack_total_size
*
* Retrieve the size to allocate for the signal stack, including the TEB at the bottom.
* Must be a power of two.
*/
size_t get_signal_stack_total_size(void)
{
assert( sizeof(TEB) <= 2*getpagesize() );
return 2*getpagesize(); /* this is just for the TEB, we don't need a signal stack */
}
/***********************************************************************
* set_handler
*
* Set a signal handler
*/
static int set_handler( int sig, void (*func)() )
{
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, SIGUSR2 );
sig_act.sa_flags = SA_RESTART | SA_SIGINFO | SA_ONSTACK;
return sigaction( sig, &sig_act, NULL );
}
/***********************************************************************
* __wine_set_signal_handler (NTDLL.@)
*/
int __wine_set_signal_handler(unsigned int sig, wine_signal_handler wsh)
{
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;
#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;
}
/**********************************************************************
* __wine_enter_vm86 (NTDLL.@)
*/
void __wine_enter_vm86( CONTEXT *context )
{
MESSAGE("vm86 mode not supported on this platform\n");
}
/**********************************************************************
* DbgBreakPoint (NTDLL.@)
*/
__ASM_GLOBAL_FUNC( DbgBreakPoint, "int $3; ret");
/**********************************************************************
* DbgUserBreakPoint (NTDLL.@)
*/
__ASM_GLOBAL_FUNC( DbgUserBreakPoint, "int $3; ret");
#endif /* __x86_64__ */
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