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, 2008, 2009, 2010
   4    Free Software Foundation, Inc.
   5
   6    Contributed by: Mike Stump <mrs@wrs.com>
   7    Brought up to date by CodeSourcery, LLC.
   8
   9 This file is part of GCC.
  10
  11 GCC is free software; you can redistribute it and/or modify
  12 it under the terms of the GNU General Public License as published by
  13 the Free Software Foundation; either version 3, or (at your option)
  14 any later version.
  15
  16 GCC is distributed in the hope that it will be useful,
  17 but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 GNU General Public License for more details.
  20
  21 You should have received a copy of the GNU General Public License
  22 along with GCC; see the file COPYING3.  If not see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25
  26 #define TARGET_OS_CPP_BUILTINS()                \
  27   do {                                          \
  28     if (TARGET_BIG_END)                         \
  29       builtin_define ("ARMEB");                 \
  30     else                                        \
  31       builtin_define ("ARMEL");                 \
  32                                                 \
  33     if (arm_arch_xscale)                        \
  34       builtin_define ("CPU=XSCALE");            \
  35     else if (arm_arch5)                         \
  36       builtin_define ("CPU=ARMARCH5");          \
  37     else if (arm_arch4)                         \
  38       {                                         \
  39         if (thumb_code)                         \
  40           builtin_define ("CPU=ARMARCH4_T");    \
  41         else                                    \
  42           builtin_define ("CPU=ARMARCH4");      \
  43       }                                         \
  44     VXWORKS_OS_CPP_BUILTINS ();                 \
  45   } while (0)
  46
  47 #undef SUBTARGET_OVERRIDE_OPTIONS
  48 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS
  49
  50 /* Subsume the arm/elf.h definition, and add RTP hooks.  */
  51 #undef SUBTARGET_CPP_SPEC
  52 #define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC
  53
  54 #undef  CC1_SPEC
  55 #define CC1_SPEC                                                        \
  56 "%{tstrongarm:-mlittle-endian -mcpu=strongarm ;                         \
  57    t4:        -mlittle-endian -march=armv4 ;                            \
  58    t4be:      -mbig-endian -march=armv4 ;                               \
  59    t4t:       -mthumb -mthumb-interwork -mlittle-endian -march=armv4t ; \
  60    t4tbe:     -mthumb -mthumb-interwork -mbig-endian -march=armv4t ;    \
  61    t5:        -mlittle-endian -march=armv5 ;                            \
  62    t5be:      -mbig-endian -march=armv5 ;                               \
  63    t5t:       -mthumb -mthumb-interwork -mlittle-endian -march=armv5 ;  \
  64    t5tbe:     -mthumb -mthumb-interwork -mbig-endian -march=armv5 ;     \
  65    txscale:   -mlittle-endian -mcpu=xscale ;                            \
  66    txscalebe: -mbig-endian -mcpu=xscale ;                               \
  67             : -march=armv4}"
  68
  69 /* Pass -EB for big-endian targets.  */
  70 #define VXWORKS_ENDIAN_SPEC \
  71   "%{mbig-endian|t4be|t4tbe|t5be|t5tbe|txscalebe:-EB}"
  72
  73 #undef SUBTARGET_EXTRA_ASM_SPEC
  74 #define SUBTARGET_EXTRA_ASM_SPEC VXWORKS_ENDIAN_SPEC
  75
  76 #undef LINK_SPEC
  77 #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC
  78
  79 #undef LIB_SPEC
  80 #define LIB_SPEC VXWORKS_LIB_SPEC
  81
  82 #undef STARTFILE_SPEC
  83 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  84
  85 #undef ENDFILE_SPEC
  86 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  87
  88 #undef TARGET_VERSION
  89 #define TARGET_VERSION fputs (" (ARM/VxWorks)", stderr);
  90
  91 /* There is no default multilib.  */
  92 #undef MULTILIB_DEFAULTS
  93
  94 #define FPUTYPE_DEFAULT "vfp"
  95
  96 #undef FUNCTION_PROFILER
  97 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER
  98
  99 /* We want to be compatible with a version of "2.96" at one point in
 100    the past before this macro was changed.  */
 101 #undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
 102 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
 103
 104 /* The kernel loader does not allow relocations to overflow, so we
 105    cannot allow arbitrary relocation addends in kernel modules or RTP
 106    executables.  Also, the dynamic loader uses the resolved relocation
 107    value to distinguish references to the text and data segments, so we
 108    cannot allow arbitrary offsets for shared libraries either.  */
 109 #undef ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P
 110 #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1
 111
 112 #undef TARGET_DEFAULT_WORD_RELOCATIONS
 113 #define TARGET_DEFAULT_WORD_RELOCATIONS 1