gcc/config/tilepro/linux.h

   1 /* Definitions for TILEPro running Linux-based GNU systems with ELF.
   2    Copyright (C) 2011-2019 Free Software Foundation, Inc.
   3    Contributed by Walter Lee (walt@tilera.com)
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #undef CPP_SPEC
  22 #define CPP_SPEC "%{pthread:-D_REENTRANT}"
  23
  24 #undef  LINK_SPEC
  25 #define LINK_SPEC "\
  26   %{shared:-shared} \
  27   %{!shared: \
  28     %{!static: \
  29       %{rdynamic:-export-dynamic} \
  30       -dynamic-linker /lib/ld.so.1} \
  31     %{static:-static}}"
  32
  33 #define NO_PROFILE_COUNTERS     1
  34
  35 #undef MCOUNT_NAME
  36 #define MCOUNT_NAME "__mcount"
  37
  38 #undef NEED_INDICATE_EXEC_STACK
  39 #define NEED_INDICATE_EXEC_STACK 1
  40
  41 #ifdef TARGET_LIBC_PROVIDES_SSP
  42 /* TILEPro glibc provides __stack_chk_guard two pointer-size words before
  43    tp. */
  44 #define TARGET_THREAD_SSP_OFFSET (-2 * GET_MODE_SIZE (ptr_mode))
  45 #endif
  46
  47 /* For __clear_cache in libgcc2.c.  */
  48 #ifdef IN_LIBGCC2
  49
  50 /* Use the minimum page size of 4K.  Alternatively we can call
  51    getpagesize() but it introduces a libc dependence.
  52    See Linux arch/tile/include/uapi/arch/icache.h for more commentary.  */
  53 #undef CLEAR_INSN_CACHE
  54 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  55 {                                                                       \
  56   long size = (long) (END) - (long) (BEG);                              \
  57   if (size)                                                             \
  58     {                                                                   \
  59       const char *start = (const char *) ((unsigned long) (BEG) & -64L);\
  60       const char *end =  start + (size < 16384 ? size : 16384) - 1;     \
  61       long num_passes = 4;                                              \
  62       __insn_mf ();                                                     \
  63       do                                                                \
  64       {                                                                 \
  65         const char *p;                                                  \
  66         for (p = start; p <= end; p += 64)                              \
  67           __insn_icoh (p);                                              \
  68         start += 4096;                                                  \
  69         end += 4096;                                                    \
  70       }                                                                 \
  71       while (--num_passes > 0);                                         \
  72       __insn_drain ();                                                  \
  73     }                                                                   \
  74 }
  75
  76 #else
  77
  78 /* define CLEAR_INSN_CACHE so that gcc knows to expand __builtin__clear_cache
  79    to the libraray call.  */
  80 #undef CLEAR_INSN_CACHE
  81 #define CLEAR_INSN_CACHE 1
  82
  83 #endif