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1 /* Definitions of target machine for GCC,
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2 for ARM with targetting the VXWorks run time environment.
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3 Copyright (C) 1999, 2000, 2003, 2004, 2007, 2008
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4 Free Software Foundation, Inc.
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5
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6 Contributed by: Mike Stump <mrs@wrs.com>
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7 Brought up to date by CodeSourcery, LLC.
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8
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9 This file is part of GCC.
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10
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11 GCC is free software; you can redistribute it and/or modify
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12 it under the terms of the GNU General Public License as published by
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13 the Free Software Foundation; either version 3, or (at your option)
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14 any later version.
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15
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16 GCC is distributed in the hope that it will be useful,
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17 but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 GNU General Public License for more details.
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20
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21 You should have received a copy of the GNU General Public License
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22 along with GCC; see the file COPYING3. If not see
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23 <http://www.gnu.org/licenses/>. */
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24
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25
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26 #define TARGET_OS_CPP_BUILTINS() \
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27 do { \
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28 if (TARGET_BIG_END) \
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29 builtin_define ("ARMEB"); \
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30 else \
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31 builtin_define ("ARMEL"); \
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32 \
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33 if (arm_arch_xscale) \
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34 builtin_define ("CPU=XSCALE"); \
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35 else if (arm_arch5) \
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36 builtin_define ("CPU=ARMARCH5"); \
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37 else if (arm_arch4) \
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38 { \
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39 if (thumb_code) \
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40 builtin_define ("CPU=ARMARCH4_T"); \
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41 else \
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42 builtin_define ("CPU=ARMARCH4"); \
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43 } \
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44 VXWORKS_OS_CPP_BUILTINS (); \
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45 } while (0)
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46
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47 #undef OVERRIDE_OPTIONS
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48 #define OVERRIDE_OPTIONS \
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49 do \
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50 { \
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51 VXWORKS_OVERRIDE_OPTIONS; \
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52 arm_override_options (); \
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53 } \
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54 while (0)
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55
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56 /* Subsume the arm/elf.h definition, and add RTP hooks. */
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57 #undef SUBTARGET_CPP_SPEC
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58 #define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC
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59
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60 #undef CC1_SPEC
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61 #define CC1_SPEC \
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62 "%{tstrongarm:-mlittle-endian -mcpu=strongarm ; \
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63 t4: -mlittle-endian -march=armv4 ; \
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64 t4be: -mbig-endian -march=armv4 ; \
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65 t4t: -mthumb -mthumb-interwork -mlittle-endian -march=armv4t ; \
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66 t4tbe: -mthumb -mthumb-interwork -mbig-endian -march=armv4t ; \
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67 t5: -mlittle-endian -march=armv5 ; \
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68 t5be: -mbig-endian -march=armv5 ; \
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69 t5t: -mthumb -mthumb-interwork -mlittle-endian -march=armv5 ; \
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70 t5tbe: -mthumb -mthumb-interwork -mbig-endian -march=armv5 ; \
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71 txscale: -mlittle-endian -mcpu=xscale ; \
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72 txscalebe: -mbig-endian -mcpu=xscale ; \
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73 : -march=armv4}"
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74
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75 /* Pass -EB for big-endian targets. */
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76 #define VXWORKS_ENDIAN_SPEC \
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77 "%{mbig-endian|t4be|t4tbe|t5be|t5tbe|txscalebe:-EB}"
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78
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79 #undef SUBTARGET_EXTRA_ASM_SPEC
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80 #define SUBTARGET_EXTRA_ASM_SPEC VXWORKS_ENDIAN_SPEC
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81
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82 #undef LINK_SPEC
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83 #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC
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84
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85 #undef LIB_SPEC
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86 #define LIB_SPEC VXWORKS_LIB_SPEC
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87
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88 #undef STARTFILE_SPEC
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89 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
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90
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91 #undef ENDFILE_SPEC
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92 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
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93
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94 #undef TARGET_VERSION
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95 #define TARGET_VERSION fputs (" (ARM/VxWorks)", stderr);
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96
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97 /* There is no default multilib. */
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98 #undef MULTILIB_DEFAULTS
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99
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100 #define FPUTYPE_DEFAULT FPUTYPE_VFP
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101
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102 #undef FUNCTION_PROFILER
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103 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER
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104
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105 /* We want to be compatible with a version of "2.96" at one point in
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106 the past before this macro was changed. */
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107 #undef DEFAULT_STRUCTURE_SIZE_BOUNDARY
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108 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8
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109
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110 /* The kernel loader does not allow relocations to overflow, so we
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111 cannot allow arbitrary relocation addends in kernel modules or RTP
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112 executables. Also, the dynamic loader uses the resolved relocation
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113 value to distinguish references to the text and data segments, so we
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114 cannot allow arbitrary offsets for shared libraries either. */
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115 #undef ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P
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116 #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1
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117
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118 #undef TARGET_DEFAULT_WORD_RELOCATIONS
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119 #define TARGET_DEFAULT_WORD_RELOCATIONS 1
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