gcc/config/arm/vxworks.h

   1 /* Definitions of target machine for GCC,
   2    for ARM with targeting the VXWorks run time environment.
   3    Copyright (C) 1999-2016 Free Software Foundation, Inc.
   4
   5    Contributed by: Mike Stump <mrs@wrs.com>
   6    Brought up to date by CodeSourcery, LLC.
   7
   8 This file is part of GCC.
   9
  10 GCC is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 3, or (at your option)
  13 any later version.
  14
  15 GCC is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 Under Section 7 of GPL version 3, you are granted additional
  21 permissions described in the GCC Runtime Library Exception, version
  22 3.1, as published by the Free Software Foundation.
  23
  24 You should have received a copy of the GNU General Public License and
  25 a copy of the GCC Runtime Library Exception along with this program;
  26 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  27 <http://www.gnu.org/licenses/>.  */
  28
  29
  30 #define TARGET_OS_CPP_BUILTINS()                \
  31   do {                                          \
  32     if (TARGET_BIG_END)                         \
  33       builtin_define ("ARMEB");                 \
  34     else                                        \
  35       builtin_define ("ARMEL");                 \
  36                                                 \
  37     if (arm_arch_xscale)                        \
  38       builtin_define ("CPU=XSCALE");            \
  39     else if (arm_arch5)                         \
  40       builtin_define ("CPU=ARMARCH5");          \
  41     else if (arm_arch4)                         \
  42       {                                         \
  43         if (TARGET_THUMB)                       \
  44           builtin_define ("CPU=ARMARCH4_T");    \
  45         else                                    \
  46           builtin_define ("CPU=ARMARCH4");      \
  47       }                                         \
  48     VXWORKS_OS_CPP_BUILTINS ();                 \
  49   } while (0)
  50
  51 #undef SUBTARGET_OVERRIDE_OPTIONS
  52 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
  53
  54 /* Subsume the arm/elf.h definition, and add RTP hooks.  */
  55 #undef SUBTARGET_CPP_SPEC
  56 #define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC
  57
  58 #undef  CC1_SPEC
  59 #define CC1_SPEC                                                        \
  60 "%{tstrongarm:-mlittle-endian -mcpu=strongarm ;                         \
  61    t4:        -mlittle-endian -march=armv4 ;                            \
  62    t4be:      -mbig-endian -march=armv4 ;                               \
  63    t4t:       -mthumb -mthumb-interwork -mlittle-endian -march=armv4t ; \
  64    t4tbe:     -mthumb -mthumb-interwork -mbig-endian -march=armv4t ;    \
  65    t5:        -mlittle-endian -march=armv5 ;                            \
  66    t5be:      -mbig-endian -march=armv5 ;                               \
  67    t5t:       -mthumb -mthumb-interwork -mlittle-endian -march=armv5 ;  \
  68    t5tbe:     -mthumb -mthumb-interwork -mbig-endian -march=armv5 ;     \
  69    txscale:   -mlittle-endian -mcpu=xscale ;                            \
  70    txscalebe: -mbig-endian -mcpu=xscale ;                               \
  71             : -march=armv4}"
  72
  73 /* Pass -EB for big-endian targets.  */
  74 #define VXWORKS_ENDIAN_SPEC \
  75   "%{mbig-endian|t4be|t4tbe|t5be|t5tbe|txscalebe:-EB}"
  76
  77 #undef SUBTARGET_EXTRA_ASM_SPEC
  78 #define SUBTARGET_EXTRA_ASM_SPEC VXWORKS_ENDIAN_SPEC
  79
  80 #undef LINK_SPEC
  81 #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC
  82
  83 #undef LIB_SPEC
  84 #define LIB_SPEC VXWORKS_LIB_SPEC
  85
  86 #undef STARTFILE_SPEC
  87 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  88
  89 #undef ENDFILE_SPEC
  90 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  91
  92 /* There is no default multilib.  */
  93 #undef MULTILIB_DEFAULTS
  94
  95 #define FPUTYPE_DEFAULT "vfp"
  96
  97 #undef FUNCTION_PROFILER
  98 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER
  99
 100 /* We want to be compatible with a version of "2.96" at one point in
 101    the past before this macro was changed.  */
 102 #undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
 103 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
 104
 105 /* The kernel loader does not allow relocations to overflow, so we
 106    cannot allow arbitrary relocation addends in kernel modules or RTP
 107    executables.  Also, the dynamic loader uses the resolved relocation
 108    value to distinguish references to the text and data segments, so we
 109    cannot allow arbitrary offsets for shared libraries either.  */
 110 #undef ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P
 111 #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1
 112
 113 #undef TARGET_DEFAULT_WORD_RELOCATIONS
 114 #define TARGET_DEFAULT_WORD_RELOCATIONS 1