gcc/config/arm/vxworks.h

   1 /* Definitions of target machine for GCC,
   2    for ARM with targetting the VXWorks run time environment.
   3    Copyright (C) 1999, 2000, 2003, 2004, 2007 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 You should have received a copy of the GNU General Public License
  21 along with GCC; see the file COPYING3.  If not see
  22 <http://www.gnu.org/licenses/>.  */
  23
  24
  25 #define TARGET_OS_CPP_BUILTINS()                \
  26   do {                                          \
  27     if (TARGET_BIG_END)                         \
  28       builtin_define ("ARMEB");                 \
  29     else                                        \
  30       builtin_define ("ARMEL");                 \
  31                                                 \
  32     if (arm_arch_xscale)                        \
  33       builtin_define ("CPU=XSCALE");            \
  34     else if (arm_arch5)                         \
  35       builtin_define ("CPU=ARMARCH5");          \
  36     else if (arm_arch4)                         \
  37       {                                         \
  38         if (thumb_code)                         \
  39           builtin_define ("CPU=ARMARCH4_T");    \
  40         else                                    \
  41           builtin_define ("CPU=ARMARCH4");      \
  42       }                                         \
  43     VXWORKS_OS_CPP_BUILTINS ();                 \
  44   } while (0)
  45
  46 #undef OVERRIDE_OPTIONS
  47 #define OVERRIDE_OPTIONS                        \
  48   do                                            \
  49     {                                           \
  50       VXWORKS_OVERRIDE_OPTIONS;                 \
  51       arm_override_options ();                  \
  52     }                                           \
  53   while (0)
  54
  55 /* Subsume the arm/elf.h definition, and add RTP hooks.  */
  56 #undef SUBTARGET_CPP_SPEC
  57 #define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC
  58
  59 #undef  CC1_SPEC
  60 #define CC1_SPEC                                                        \
  61 "%{tstrongarm:-mlittle-endian -mcpu=strongarm ;                         \
  62    t4:        -mlittle-endian -march=armv4 ;                            \
  63    t4be:      -mbig-endian -march=armv4 ;                               \
  64    t4t:       -mthumb -mthumb-interwork -mlittle-endian -march=armv4t ; \
  65    t4tbe:     -mthumb -mthumb-interwork -mbig-endian -march=armv4t ;    \
  66    t5:        -mlittle-endian -march=armv5 ;                            \
  67    t5be:      -mbig-endian -march=armv5 ;                               \
  68    t5t:       -mthumb -mthumb-interwork -mlittle-endian -march=armv5 ;  \
  69    t5tbe:     -mthumb -mthumb-interwork -mbig-endian -march=armv5 ;     \
  70    txscale:   -mlittle-endian -mcpu=xscale ;                            \
  71    txscalebe: -mbig-endian -mcpu=xscale ;                               \
  72             : -march=armv4}"
  73
  74 /* Pass -EB for big-endian targets.  */
  75 #define VXWORKS_ENDIAN_SPEC \
  76   "%{mbig-endian|t4be|t4tbe|t5be|t5tbe|txscalebe:-EB}"
  77
  78 #undef SUBTARGET_EXTRA_ASM_SPEC
  79 #define SUBTARGET_EXTRA_ASM_SPEC VXWORKS_ENDIAN_SPEC
  80
  81 #undef LINK_SPEC
  82 #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC
  83
  84 #undef LIB_SPEC
  85 #define LIB_SPEC VXWORKS_LIB_SPEC
  86
  87 #undef STARTFILE_SPEC
  88 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  89
  90 #undef ENDFILE_SPEC
  91 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  92
  93 #undef TARGET_VERSION
  94 #define TARGET_VERSION fputs (" (ARM/VxWorks)", stderr);
  95
  96 /* There is no default multilib.  */
  97 #undef MULTILIB_DEFAULTS
  98
  99 #define FPUTYPE_DEFAULT FPUTYPE_VFP
 100
 101 #undef FUNCTION_PROFILER
 102 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER
 103
 104 /* We want to be compatible with a version of "2.96" at one point in
 105    the past before this macro was changed.  */
 106 #undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
 107 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
 108
 109 /* The kernel loader does not allow relocations to overflow, so we
 110    cannot allow arbitrary relocation addends in kernel modules or RTP
 111    executables.  Also, the dynamic loader uses the resolved relocation
 112    value to distinguish references to the text and data segments, so we
 113    cannot allow arbitrary offsets for shared libraries either.  */
 114 #undef ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P
 115 #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1