gcc/libgcc/config/i386/enable-execute-stack-mingw32.c

/* Implement __enable_execute_stack for Windows32.
   Copyright (C) 2011-2017 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/>.  */

#include <windows.h>

extern void __enable_execute_stack (void *);

void
__enable_execute_stack (void *addr)
{
  MEMORY_BASIC_INFORMATION b;

  if (!VirtualQuery (addr, &b, sizeof(b)))
    abort ();
  VirtualProtect (b.BaseAddress, b.RegionSize, PAGE_EXECUTE_READWRITE,
		  &b.Protect);
}