include/vtv-change-permission.h

   1 /* Copyright (C) 2013-2023 Free Software Foundation, Inc.
   2
   3    This file is part of GCC.
   4
   5    modify it under the terms of the GNU Library General Public License
   6    as published by the Free Software Foundation; either version 2, or
   7    (at your option) any later version.
   8
   9    In addition to the permissions in the GNU Library General Public
  10    License, the Free Software Foundation gives you unlimited
  11    permission to link the compiled version of this file into
  12    combinations with other programs, and to distribute those
  13    combinations without any restriction coming from the use of this
  14    file.  (The Library Public License restrictions do apply in other
  15    respects; for example, they cover modification of the file, and
  16    distribution when not linked into a combined executable.)
  17
  18    This program is distributed in the hope that it will be useful, but
  19    WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  21    Library General Public License for more details.
  22
  23    You should have received a copy of the GNU Library General Public
  24    License along with this program; if not, write to the Free Software
  25    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  26    02110-1301, USA.  */
  27
  28
  29 #ifndef __VTV_H__
  30 #define __VTV_H__
  31
  32 /* We could have used an enumeration here but it just makes it more
  33    difficult for the compiler to generate a call to this.  These are
  34    used as arguments to the function __VLTChangePermission, declared
  35    below.  */
  36 #define __VLTP_READ_ONLY  0
  37 #define __VLTP_READ_WRITE 1
  38
  39 #ifdef __cplusplus
  40 extern "C" void __VLTChangePermission (int);
  41 #else
  42 extern void __VLTChangePermission (int);
  43 #endif
  44
  45 #ifdef BIG_PAGE_SIZE
  46 /* TODO - Replace '4096' below with correct big page size.  */
  47 #define VTV_PAGE_SIZE 4096
  48 #else
  49 #if defined(__sun__) && defined(__svr4__) && defined(__sparc__)
  50 #define VTV_PAGE_SIZE 8192
  51 #elif defined(__loongarch_lp64)
  52 /* The page size is configurable by the kernel to be 4, 16 or 64 KiB.
  53    For now, only the default page size of 16KiB is supported.  */
  54 #define VTV_PAGE_SIZE 16384
  55 #else
  56 #define VTV_PAGE_SIZE 4096
  57 #endif
  58 #endif
  59
  60
  61
  62 #endif /* __VTV_H__ */