gcc/config/c6x/uclinux-elf.h

   1 /* Definitions for TI C6X running ucLinux using ELF
   2    Copyright (C) 2010-2018 Free Software Foundation, Inc.
   3    Contributed by Andrew Jenner <andrew@codesourcery.com>
   4    Contributed by Bernd Schmidt <bernds@codesourcery.com>
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 3, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING3.  If not see
  20    <http://www.gnu.org/licenses/>.  */
  21
  22 #undef TARGET_OS_CPP_BUILTINS
  23 #define TARGET_OS_CPP_BUILTINS()                \
  24   do                                            \
  25     {                                           \
  26       builtin_define ("__uClinux__");           \
  27       builtin_define_std ("linux");             \
  28       builtin_define_std ("unix");              \
  29       builtin_assert ("system=linux");          \
  30       builtin_assert ("system=unix");           \
  31       builtin_assert ("system=posix");          \
  32     }                                           \
  33   while (false)
  34
  35 #undef  STARTFILE_SPEC
  36 #define STARTFILE_SPEC \
  37   "%{!shared:crt1%O%s} crti%O%s %{shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  38
  39 #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
  40
  41 #undef LINK_SPEC
  42 #define LINK_SPEC ENDIAN_LINK_SPEC \
  43   "%{shared} %{" FPIE_SPEC ":-pie} \
  44   %{!shared: %{!static: \
  45    %{rdynamic:-export-dynamic} \
  46    %{!dynamic-linker:-dynamic-linker " UCLIBC_DYNAMIC_LINKER "}} \
  47    %{static}}"
  48
  49 #undef DRIVER_SELF_SPECS
  50 #define DRIVER_SELF_SPECS "%{!mno-dsbt:-mdsbt}"
  51
  52 /* Clear the instruction cache from `beg' to `end'.  This makes an
  53    inline system call to SYS_cacheflush.  */
  54 #undef CLEAR_INSN_CACHE
  55 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  56 {                                                                       \
  57   register unsigned long _beg __asm ("A4") = (unsigned long) (BEG);     \
  58   register unsigned long _end __asm ("B4") = (unsigned long) (END);     \
  59   register unsigned long _scno __asm ("B0") = 244;                      \
  60   __asm __volatile ("swe                ; sys_cache_sync"               \
  61                     : "=a" (_beg)                                       \
  62                     : "0" (_beg), "b" (_end), "b" (_scno));     \
  63 }