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      1 /* Definitions of target machine for GNU compiler.  Vxworks Aarch 64bit
      2    version.
      3    Copyright (C) 2018-2022 Free Software Foundation, Inc.
      4    Contributed by Douglas B Rupp
      5 
      6 This file is part of GCC.
      7 
      8 GCC is free software; you can redistribute it and/or modify it under
      9 the terms of the GNU General Public License as published by the Free
     10 Software Foundation; either version 3, or (at your option) any later
     11 version.
     12 
     13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
     14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
     15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
     16 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 SUBTARGET_OVERRIDE_OPTIONS
     23 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
     24 
     25 #undef LINK_SPEC
     26 #define LINK_SPEC VXWORKS_LINK_SPEC
     27 
     28 #undef LIB_SPEC
     29 #define LIB_SPEC VXWORKS_LIB_SPEC
     30 
     31 #undef STARTFILE_SPEC
     32 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
     33 
     34 #undef ENDFILE_SPEC
     35 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
     36 
     37 #undef CPP_SPEC
     38 #define CPP_SPEC VXWORKS_ADDITIONAL_CPP_SPEC
     39 
     40 #undef CC1_SPEC
     41 #define CC1_SPEC VXWORKS_CC1_SPEC
     42 
     43 #undef FUNCTION_PROFILER
     44 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER
     45 
     46 #undef TARGET_OS_CPP_BUILTINS
     47 #define TARGET_OS_CPP_BUILTINS()	  \
     48   do {					  \
     49     if (TARGET_BIG_END)                         \
     50       builtin_define ("ARMEB");                 \
     51     else                                        \
     52       builtin_define ("ARMEL");                 \
     53     builtin_define \
     54       (VX_CPU_PREFIX "CPU=" VX_CPU_PREFIX "ARMARCH8A");	\
     55     VXWORKS_OS_CPP_BUILTINS ();		  \
     56   } while (0)
     57 
     58 /* Static stack checking is supported.  */
     59 #define STACK_CHECK_STATIC_BUILTIN 1
     60 
     61 #undef STACK_CHECK_PROTECT
     62 #define STACK_CHECK_PROTECT 16384
     63 
     64 /* The VxWorks environment on aarch64 is llvm-based.  */
     65 #undef VXWORKS_PERSONALITY
     66 #define VXWORKS_PERSONALITY "llvm"
     67 
     68 /* VxWorks uses R18 as a TCB pointer.  We must pick something else as
     69    the static chain and R18 needs to be claimed "fixed".  Until we
     70    arrange to override the common parts of the port family to
     71    acknowledge the latter, configure --with-specs="-ffixed-r18".  */
     72 #undef  STATIC_CHAIN_REGNUM
     73 #define STATIC_CHAIN_REGNUM 9
     74 
     75