gcc/config/tilegx/linux.h

   1 /* Definitions for TILE-Gx running Linux-based GNU systems with ELF.
   2    Copyright (C) 2011-2020 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 ASM_SPEC
  25 #define ASM_SPEC "%(endian_spec) %{m32:--32} %{m64:--64}"
  26
  27 #undef  LINK_SPEC
  28 #define LINK_SPEC "%(endian_spec) \
  29   %{m64:-m elf64tilegx} %{m32:-m elf32tilegx} \
  30   %{shared:-shared} \
  31   %{!shared: \
  32     %{!static: \
  33       %{rdynamic:-export-dynamic} \
  34       -dynamic-linker \
  35         %{ m32: /lib32/ld.so.1} \
  36         %{!m32: /lib/ld.so.1}} \
  37     %{static:-static}}"
  38
  39 #define MULTILIB_DEFAULTS { "m64" }
  40
  41 #define NO_PROFILE_COUNTERS     1
  42
  43 #undef MCOUNT_NAME
  44 #define MCOUNT_NAME "__mcount"
  45
  46 #undef NEED_INDICATE_EXEC_STACK
  47 #define NEED_INDICATE_EXEC_STACK 1
  48
  49 #ifdef TARGET_LIBC_PROVIDES_SSP
  50 /* TILE-Gx glibc provides __stack_chk_guard two pointer-size words before
  51    tp. */
  52 #define TARGET_THREAD_SSP_OFFSET (-2 * GET_MODE_SIZE (ptr_mode))
  53 #endif
  54
  55 /* For __clear_cache in libgcc2.c.  */
  56 #ifdef IN_LIBGCC2
  57
  58 /* Use the minimum page size of 4K.  Alternatively we can call
  59    getpagesize() but it introduces a libc dependence.
  60    See Linux arch/tile/include/uapi/arch/icache.h for more commentary.  */
  61 #undef CLEAR_INSN_CACHE
  62 #define CLEAR_INSN_CACHE(BEG, END)                                      \
  63 {                                                                       \
  64   long size = (long) (END) - (long) (BEG);                              \
  65   if (size)                                                             \
  66     {                                                                   \
  67       const char *p = (const char *) ((unsigned long) (BEG) & -64L);    \
  68       const char *end = p + (size < 4096 ? size : 4096) - 1;            \
  69       __insn_mf ();                                                     \
  70       for (; p <= end; p += 64)                                         \
  71         __insn_icoh (p);                                                \
  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