sysdeps/unix/sysv/linux/i386/startup.h

   1 /* Linux/i386 definitions of functions used by static libc main startup.
   2    Copyright (C) 2017-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #if BUILD_PIE_DEFAULT
  20 # include <abort-instr.h>
  21
  22 /* Can't use "call *%gs:SYSINFO_OFFSET" during statup in static PIE.  */
  23 # define I386_USE_SYSENTER 0
  24
  25 __attribute__ ((__noreturn__))
  26 static inline void
  27 _startup_fatal (const char *message __attribute__ ((unused)))
  28 {
  29   /* This is only called very early during startup in static PIE.
  30      FIXME: How can it be improved?  */
  31   ABORT_INSTRUCTION;
  32   __builtin_unreachable ();
  33 }
  34 #else
  35 # include_next <startup.h>
  36 #endif