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      1 /* Definitions for TILE-Gx running Linux-based GNU systems with ELF.
      2    Copyright (C) 2011-2022 Free Software Foundation, Inc.
      3    Contributed by Walter Lee (walt (at) 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
     84