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wine/dlls/msvcrt/except.c

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/*
* msvcrt.dll exception handling
*
* Copyright 2000 Jon Griffiths
* Copyright 2005 Juan Lang
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* FIXME: Incomplete support for nested exceptions/try block cleanup.
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "wine/exception.h"
#include "msvcrt.h"
#include "excpt.h"
#include "wincon.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
static MSVCRT_security_error_handler security_error_handler;
#ifdef __x86_64__
/*******************************************************************
* _setjmp (MSVCRT.@)
*/
__ASM_GLOBAL_FUNC( MSVCRT__setjmp,
"xorq %rdx,%rdx\n\t" /* frame */
"jmp " __ASM_NAME("MSVCRT__setjmpex") );
/*******************************************************************
* _setjmpex (MSVCRT.@)
*/
__ASM_GLOBAL_FUNC( MSVCRT__setjmpex,
"movq %rdx,(%rcx)\n\t" /* jmp_buf->Frame */
"movq %rbx,0x8(%rcx)\n\t" /* jmp_buf->Rbx */
"leaq 0x8(%rsp),%rax\n\t"
"movq %rax,0x10(%rcx)\n\t" /* jmp_buf->Rsp */
"movq %rbp,0x18(%rcx)\n\t" /* jmp_buf->Rbp */
"movq %rsi,0x20(%rcx)\n\t" /* jmp_buf->Rsi */
"movq %rdi,0x28(%rcx)\n\t" /* jmp_buf->Rdi */
"movq %r12,0x30(%rcx)\n\t" /* jmp_buf->R12 */
"movq %r13,0x38(%rcx)\n\t" /* jmp_buf->R13 */
"movq %r14,0x40(%rcx)\n\t" /* jmp_buf->R14 */
"movq %r15,0x48(%rcx)\n\t" /* jmp_buf->R15 */
"movq (%rsp),%rax\n\t"
"movq %rax,0x50(%rcx)\n\t" /* jmp_buf->Rip */
"movdqa %xmm6,0x60(%rcx)\n\t" /* jmp_buf->Xmm6 */
"movdqa %xmm7,0x70(%rcx)\n\t" /* jmp_buf->Xmm7 */
"movdqa %xmm8,0x80(%rcx)\n\t" /* jmp_buf->Xmm8 */
"movdqa %xmm9,0x90(%rcx)\n\t" /* jmp_buf->Xmm9 */
"movdqa %xmm10,0xa0(%rcx)\n\t" /* jmp_buf->Xmm10 */
"movdqa %xmm11,0xb0(%rcx)\n\t" /* jmp_buf->Xmm11 */
"movdqa %xmm12,0xc0(%rcx)\n\t" /* jmp_buf->Xmm12 */
"movdqa %xmm13,0xd0(%rcx)\n\t" /* jmp_buf->Xmm13 */
"movdqa %xmm14,0xe0(%rcx)\n\t" /* jmp_buf->Xmm14 */
"movdqa %xmm15,0xf0(%rcx)\n\t" /* jmp_buf->Xmm15 */
"xorq %rax,%rax\n\t"
"retq" );
extern void DECLSPEC_NORETURN CDECL longjmp_set_regs( struct MSVCRT___JUMP_BUFFER *jmp, int retval );
__ASM_GLOBAL_FUNC( longjmp_set_regs,
"movq %rdx,%rax\n\t" /* retval */
"movq 0x8(%rcx),%rbx\n\t" /* jmp_buf->Rbx */
"movq 0x18(%rcx),%rbp\n\t" /* jmp_buf->Rbp */
"movq 0x20(%rcx),%rsi\n\t" /* jmp_buf->Rsi */
"movq 0x28(%rcx),%rdi\n\t" /* jmp_buf->Rdi */
"movq 0x30(%rcx),%r12\n\t" /* jmp_buf->R12 */
"movq 0x38(%rcx),%r13\n\t" /* jmp_buf->R13 */
"movq 0x40(%rcx),%r14\n\t" /* jmp_buf->R14 */
"movq 0x48(%rcx),%r15\n\t" /* jmp_buf->R15 */
"movdqa 0x60(%rcx),%xmm6\n\t" /* jmp_buf->Xmm6 */
"movdqa 0x70(%rcx),%xmm7\n\t" /* jmp_buf->Xmm7 */
"movdqa 0x80(%rcx),%xmm8\n\t" /* jmp_buf->Xmm8 */
"movdqa 0x90(%rcx),%xmm9\n\t" /* jmp_buf->Xmm9 */
"movdqa 0xa0(%rcx),%xmm10\n\t" /* jmp_buf->Xmm10 */
"movdqa 0xb0(%rcx),%xmm11\n\t" /* jmp_buf->Xmm11 */
"movdqa 0xc0(%rcx),%xmm12\n\t" /* jmp_buf->Xmm12 */
"movdqa 0xd0(%rcx),%xmm13\n\t" /* jmp_buf->Xmm13 */
"movdqa 0xe0(%rcx),%xmm14\n\t" /* jmp_buf->Xmm14 */
"movdqa 0xf0(%rcx),%xmm15\n\t" /* jmp_buf->Xmm15 */
"movq 0x50(%rcx),%rdx\n\t" /* jmp_buf->Rip */
"movq 0x10(%rcx),%rsp\n\t" /* jmp_buf->Rsp */
"jmp *%rdx" );
/*******************************************************************
* longjmp (MSVCRT.@)
*/
void __cdecl MSVCRT_longjmp( struct MSVCRT___JUMP_BUFFER *jmp, int retval )
{
EXCEPTION_RECORD rec;
if (!retval) retval = 1;
if (jmp->Frame)
{
rec.ExceptionCode = STATUS_LONGJUMP;
rec.ExceptionFlags = 0;
rec.ExceptionRecord = NULL;
rec.ExceptionAddress = NULL;
rec.NumberParameters = 1;
rec.ExceptionInformation[0] = (DWORD_PTR)jmp;
RtlUnwind( (void *)jmp->Frame, (void *)jmp->Rip, &rec, IntToPtr(retval) );
}
longjmp_set_regs( jmp, retval );
}
/*******************************************************************
* _local_unwind (MSVCRT.@)
*/
void __cdecl _local_unwind( void *frame, void *target )
{
CONTEXT context;
RtlUnwindEx( frame, target, NULL, 0, &context, NULL );
}
#endif /* __x86_64__ */
static MSVCRT___sighandler_t sighandlers[MSVCRT_NSIG] = { MSVCRT_SIG_DFL };
static BOOL WINAPI msvcrt_console_handler(DWORD ctrlType)
{
BOOL ret = FALSE;
switch (ctrlType)
{
case CTRL_C_EVENT:
if (sighandlers[MSVCRT_SIGINT])
{
if (sighandlers[MSVCRT_SIGINT] != MSVCRT_SIG_IGN)
sighandlers[MSVCRT_SIGINT](MSVCRT_SIGINT);
ret = TRUE;
}
break;
}
return ret;
}
typedef void (CDECL *float_handler)(int, int);
/* The exception codes are actually NTSTATUS values */
static const struct
{
NTSTATUS status;
int signal;
} float_exception_map[] = {
{ EXCEPTION_FLT_DENORMAL_OPERAND, MSVCRT__FPE_DENORMAL },
{ EXCEPTION_FLT_DIVIDE_BY_ZERO, MSVCRT__FPE_ZERODIVIDE },
{ EXCEPTION_FLT_INEXACT_RESULT, MSVCRT__FPE_INEXACT },
{ EXCEPTION_FLT_INVALID_OPERATION, MSVCRT__FPE_INVALID },
{ EXCEPTION_FLT_OVERFLOW, MSVCRT__FPE_OVERFLOW },
{ EXCEPTION_FLT_STACK_CHECK, MSVCRT__FPE_STACKOVERFLOW },
{ EXCEPTION_FLT_UNDERFLOW, MSVCRT__FPE_UNDERFLOW },
};
static LONG WINAPI msvcrt_exception_filter(struct _EXCEPTION_POINTERS *except)
{
LONG ret = EXCEPTION_CONTINUE_SEARCH;
MSVCRT___sighandler_t handler;
if (!except || !except->ExceptionRecord)
return EXCEPTION_CONTINUE_SEARCH;
switch (except->ExceptionRecord->ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
if ((handler = sighandlers[MSVCRT_SIGSEGV]) != MSVCRT_SIG_DFL)
{
if (handler != MSVCRT_SIG_IGN)
{
sighandlers[MSVCRT_SIGSEGV] = MSVCRT_SIG_DFL;
handler(MSVCRT_SIGSEGV);
}
ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
/* According to msdn,
* the FPE signal handler takes as a second argument the type of
* floating point exception.
*/
case EXCEPTION_FLT_DENORMAL_OPERAND:
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_FLT_INEXACT_RESULT:
case EXCEPTION_FLT_INVALID_OPERATION:
case EXCEPTION_FLT_OVERFLOW:
case EXCEPTION_FLT_STACK_CHECK:
case EXCEPTION_FLT_UNDERFLOW:
if ((handler = sighandlers[MSVCRT_SIGFPE]) != MSVCRT_SIG_DFL)
{
if (handler != MSVCRT_SIG_IGN)
{
unsigned int i;
int float_signal = MSVCRT__FPE_INVALID;
sighandlers[MSVCRT_SIGFPE] = MSVCRT_SIG_DFL;
for (i = 0; i < sizeof(float_exception_map) /
sizeof(float_exception_map[0]); i++)
{
if (float_exception_map[i].status ==
except->ExceptionRecord->ExceptionCode)
{
float_signal = float_exception_map[i].signal;
break;
}
}
((float_handler)handler)(MSVCRT_SIGFPE, float_signal);
}
ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
case EXCEPTION_PRIV_INSTRUCTION:
if ((handler = sighandlers[MSVCRT_SIGILL]) != MSVCRT_SIG_DFL)
{
if (handler != MSVCRT_SIG_IGN)
{
sighandlers[MSVCRT_SIGILL] = MSVCRT_SIG_DFL;
handler(MSVCRT_SIGILL);
}
ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
}
return ret;
}
void msvcrt_init_signals(void)
{
SetConsoleCtrlHandler(msvcrt_console_handler, TRUE);
SetUnhandledExceptionFilter(msvcrt_exception_filter);
}
void msvcrt_free_signals(void)
{
SetConsoleCtrlHandler(msvcrt_console_handler, FALSE);
SetUnhandledExceptionFilter(NULL);
}
/*********************************************************************
* signal (MSVCRT.@)
* Some signals may never be generated except through an explicit call to
* raise.
*/
MSVCRT___sighandler_t CDECL MSVCRT_signal(int sig, MSVCRT___sighandler_t func)
{
MSVCRT___sighandler_t ret = MSVCRT_SIG_ERR;
TRACE("(%d, %p)\n", sig, func);
if (func == MSVCRT_SIG_ERR) return MSVCRT_SIG_ERR;
switch (sig)
{
/* Cases handled internally. Note SIGTERM is never generated by Windows,
* so we effectively mask it.
*/
case MSVCRT_SIGABRT:
case MSVCRT_SIGFPE:
case MSVCRT_SIGILL:
case MSVCRT_SIGSEGV:
case MSVCRT_SIGINT:
case MSVCRT_SIGTERM:
case MSVCRT_SIGBREAK:
ret = sighandlers[sig];
sighandlers[sig] = func;
break;
default:
ret = MSVCRT_SIG_ERR;
}
return ret;
}
/*********************************************************************
* raise (MSVCRT.@)
*/
int CDECL MSVCRT_raise(int sig)
{
MSVCRT___sighandler_t handler;
TRACE("(%d)\n", sig);
switch (sig)
{
case MSVCRT_SIGABRT:
case MSVCRT_SIGFPE:
case MSVCRT_SIGILL:
case MSVCRT_SIGSEGV:
case MSVCRT_SIGINT:
case MSVCRT_SIGTERM:
case MSVCRT_SIGBREAK:
handler = sighandlers[sig];
if (handler == MSVCRT_SIG_DFL) MSVCRT__exit(3);
if (handler != MSVCRT_SIG_IGN)
{
sighandlers[sig] = MSVCRT_SIG_DFL;
if (sig == MSVCRT_SIGFPE)
((float_handler)handler)(sig, MSVCRT__FPE_EXPLICITGEN);
else
handler(sig);
}
break;
default:
return -1;
}
return 0;
}
/*********************************************************************
* _XcptFilter (MSVCRT.@)
*/
int CDECL _XcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
{
TRACE("(%08x,%p)\n", ex, ptr);
/* I assume ptr->ExceptionRecord->ExceptionCode is the same as ex */
return msvcrt_exception_filter(ptr);
}
/*********************************************************************
* _abnormal_termination (MSVCRT.@)
*/
int CDECL _abnormal_termination(void)
{
FIXME("(void)stub\n");
return 0;
}
/******************************************************************
* MSVCRT___uncaught_exception
*/
BOOL CDECL MSVCRT___uncaught_exception(void)
{
return FALSE;
}
/* _set_security_error_handler - not exported in native msvcrt, added in msvcr70 */
MSVCRT_security_error_handler CDECL _set_security_error_handler(
MSVCRT_security_error_handler handler )
{
MSVCRT_security_error_handler old = security_error_handler;
TRACE("(%p)\n", handler);
security_error_handler = handler;
return old;
}
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