PR libstdc++/90920 restore previous checks for empty ranges

[thirdparty/gcc.git] / libgcc / unwind-compat.c

/* Backward compatibility unwind routines.
   Copyright (C) 2004-2019 Free Software Foundation, Inc.

   This file is part of GCC.

   GCC is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   GCC 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 General Public
   License for more details.

   Under Section 7 of GPL version 3, you are granted additional
   permissions described in the GCC Runtime Library Exception, version
   3.1, as published by the Free Software Foundation.

   You should have received a copy of the GNU General Public License and
   a copy of the GCC Runtime Library Exception along with this program;
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   <http://www.gnu.org/licenses/>.  */

#if defined (USE_GAS_SYMVER) && defined (USE_LIBUNWIND_EXCEPTIONS)
#include "tconfig.h"
#include "tsystem.h"
#include "unwind.h"
#include "unwind-dw2-fde.h"
#include "unwind-compat.h"

extern _Unwind_Reason_Code __libunwind_Unwind_Backtrace
  (_Unwind_Trace_Fn, void *);

_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Backtrace (_Unwind_Trace_Fn trace, void *trace_argument)
{
  return __libunwind_Unwind_Backtrace (trace, trace_argument);
}
symver (_Unwind_Backtrace, GCC_3.3);

extern void __libunwind_Unwind_DeleteException
  (struct _Unwind_Exception *);

void
_Unwind_DeleteException (struct _Unwind_Exception *exc)
{
  return __libunwind_Unwind_DeleteException (exc);
}
symver (_Unwind_DeleteException, GCC_3.0);

extern void * __libunwind_Unwind_FindEnclosingFunction (void *);

void *
_Unwind_FindEnclosingFunction (void *pc)
{
  return __libunwind_Unwind_FindEnclosingFunction (pc);
}
symver (_Unwind_FindEnclosingFunction, GCC_3.3);

extern _Unwind_Reason_Code __libunwind_Unwind_ForcedUnwind
  (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);

_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_ForcedUnwind (struct _Unwind_Exception *exc,
		      _Unwind_Stop_Fn stop, void * stop_argument)
{
  return __libunwind_Unwind_ForcedUnwind (exc, stop, stop_argument);
}
symver (_Unwind_ForcedUnwind, GCC_3.0);

extern _Unwind_Word __libunwind_Unwind_GetCFA
  (struct _Unwind_Context *);

_Unwind_Word
_Unwind_GetCFA (struct _Unwind_Context *context)
{
  return __libunwind_Unwind_GetCFA (context);
}
symver (_Unwind_GetCFA, GCC_3.3);

#ifdef __ia64__
extern _Unwind_Word __libunwind_Unwind_GetBSP
  (struct _Unwind_Context *);

_Unwind_Word
_Unwind_GetBSP (struct _Unwind_Context * context)
{
  return __libunwind_Unwind_GetBSP (context);
}
symver (_Unwind_GetBSP, GCC_3.3.2);
#else
extern _Unwind_Ptr __libunwind_Unwind_GetDataRelBase
  (struct _Unwind_Context *);

_Unwind_Ptr
_Unwind_GetDataRelBase (struct _Unwind_Context *context)
{
  return __libunwind_Unwind_GetDataRelBase (context);
}
symver (_Unwind_GetDataRelBase, GCC_3.0);

extern _Unwind_Ptr __libunwind_Unwind_GetTextRelBase
  (struct _Unwind_Context *);

_Unwind_Ptr
_Unwind_GetTextRelBase (struct _Unwind_Context *context)
{
  return __libunwind_Unwind_GetTextRelBase (context);
}
symver (_Unwind_GetTextRelBase, GCC_3.0);
#endif

extern _Unwind_Word __libunwind_Unwind_GetGR
  (struct _Unwind_Context *, int );

_Unwind_Word
_Unwind_GetGR (struct _Unwind_Context *context, int index)
{
  return __libunwind_Unwind_GetGR (context, index);
}
symver (_Unwind_GetGR, GCC_3.0);

extern _Unwind_Ptr __libunwind_Unwind_GetIP (struct _Unwind_Context *);

_Unwind_Ptr
_Unwind_GetIP (struct _Unwind_Context *context)
{
  return __libunwind_Unwind_GetIP (context);
}
symver (_Unwind_GetIP, GCC_3.0);

_Unwind_Ptr
_Unwind_GetIPInfo (struct _Unwind_Context *context, int *ip_before_insn)
{
  *ip_before_insn = 0;
  return __libunwind_Unwind_GetIP (context);
}

extern void *__libunwind_Unwind_GetLanguageSpecificData
  (struct _Unwind_Context *);

void *
_Unwind_GetLanguageSpecificData (struct _Unwind_Context *context)
{
  return __libunwind_Unwind_GetLanguageSpecificData (context);
}
symver (_Unwind_GetLanguageSpecificData, GCC_3.0);

extern _Unwind_Ptr __libunwind_Unwind_GetRegionStart
  (struct _Unwind_Context *);

_Unwind_Ptr
_Unwind_GetRegionStart (struct _Unwind_Context *context)
{
  return __libunwind_Unwind_GetRegionStart (context);
}
symver (_Unwind_GetRegionStart, GCC_3.0);

extern _Unwind_Reason_Code __libunwind_Unwind_RaiseException
  (struct _Unwind_Exception *);

_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_RaiseException(struct _Unwind_Exception *exc)
{
  return __libunwind_Unwind_RaiseException (exc);
}
symver (_Unwind_RaiseException, GCC_3.0);

extern void __libunwind_Unwind_Resume (struct _Unwind_Exception *);

void LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Resume (struct _Unwind_Exception *exc)
{
  __libunwind_Unwind_Resume (exc);
}
symver (_Unwind_Resume, GCC_3.0);

extern _Unwind_Reason_Code __libunwind_Unwind_Resume_or_Rethrow
   (struct _Unwind_Exception *);

_Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *exc)
{
  return __libunwind_Unwind_Resume_or_Rethrow (exc);
}
symver (_Unwind_Resume_or_Rethrow, GCC_3.3);

extern void __libunwind_Unwind_SetGR
  (struct _Unwind_Context *, int, _Unwind_Word);

void
_Unwind_SetGR (struct _Unwind_Context *context, int index,
	       _Unwind_Word val)
{
  __libunwind_Unwind_SetGR (context, index, val);
}
symver (_Unwind_SetGR, GCC_3.0);

extern void __libunwind_Unwind_SetIP
  (struct _Unwind_Context *, _Unwind_Ptr);

void
_Unwind_SetIP (struct _Unwind_Context *context, _Unwind_Ptr val)
{
  return __libunwind_Unwind_SetIP (context, val);
}
symver (_Unwind_SetIP, GCC_3.0);
#endif