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1 /* Definitions of target machine for GNU compiler, FreeBSD/arm version.
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2 Copyright (C) 2002-2018 Free Software Foundation, Inc.
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3 Contributed by Wasabi Systems, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published
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9 by the Free Software Foundation; either version 3, or (at your
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10 option) any later version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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15 License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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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 #undef SUBTARGET_CPP_SPEC
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26 #define SUBTARGET_CPP_SPEC FBSD_CPP_SPEC
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27
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28 #undef SUBTARGET_EXTRA_SPECS
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29 #define SUBTARGET_EXTRA_SPECS \
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30 { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC }, \
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31 { "subtarget_asm_float_spec", SUBTARGET_ASM_FLOAT_SPEC }, \
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32 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
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33
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34 #undef SUBTARGET_EXTRA_ASM_SPEC
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35 #define SUBTARGET_EXTRA_ASM_SPEC \
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36 "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5} " TARGET_FIX_V4BX_SPEC " \
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37 %{" FPIE_OR_FPIC_SPEC ":-k}"
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38
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39 #undef SUBTARGET_ASM_FLOAT_SPEC
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40 #ifdef TARGET_FREEBSD_ARM_HARD_FLOAT
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41 /* Default to full vfp if we build for arm*hf. */
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42 #define SUBTARGET_ASM_FLOAT_SPEC "%{!mfpu=*:-mfpu=vfp}"
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43 #else
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44 #define SUBTARGET_ASM_FLOAT_SPEC "%{!mfpu=*:-mfpu=softvfp}"
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45 #endif
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46
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47 #undef LINK_SPEC
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48 #define LINK_SPEC " \
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49 %{p:%nconsider using `-pg' instead of `-p' with gprof (1) } \
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50 %{v:-V} \
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51 %{assert*} %{R*} %{rpath*} %{defsym*} \
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52 %{shared:-Bshareable %{h*} %{soname*}} \
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53 %{!shared: \
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54 %{!static: \
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55 %{rdynamic:-export-dynamic} \
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56 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
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57 %{static:-Bstatic}} \
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58 %{!static:--hash-style=both --enable-new-dtags} \
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59 %{symbolic:-Bsymbolic} \
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60 -X %{mbig-endian:-EB} %{mlittle-endian:-EL}"
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61
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62 /* TARGET_BIG_ENDIAN_DEFAULT is set in
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63 config.gcc for big endian configurations. */
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64 #if TARGET_BIG_ENDIAN_DEFAULT
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65 #define TARGET_ENDIAN_DEFAULT MASK_BIG_END
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66 #define TARGET_ENDIAN_OPTION "mbig-endian"
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67 #define TARGET_LINKER_EMULATION "armelfb_fbsd"
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68 #else
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69 #define TARGET_ENDIAN_DEFAULT 0
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70 #define TARGET_ENDIAN_OPTION "mlittle-endian"
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71 #define TARGET_LINKER_EMULATION "armelf_fbsd"
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72 #endif
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73
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74 #undef SUBTARGET_EXTRA_LINK_SPEC
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75 #define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p"
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76
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77 #undef TARGET_OS_CPP_BUILTINS
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78 #define TARGET_OS_CPP_BUILTINS() \
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79 do \
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80 { \
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81 FBSD_TARGET_OS_CPP_BUILTINS (); \
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82 TARGET_BPABI_CPP_BUILTINS (); \
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83 } \
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84 while (false)
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85
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86 /* We default to a soft-float ABI so that binaries can run on all
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87 target hardware. */
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88 #undef TARGET_DEFAULT_FLOAT_ABI
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89 #ifdef TARGET_FREEBSD_ARM_HARD_FLOAT
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90 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD
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91 #else
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92 #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_SOFT
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93 #endif
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94
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95 #undef ARM_DEFAULT_ABI
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96
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97 /* AACPS_LINUX has access to kernel atomic ops while we don't.
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98 But AACPS defaults to short_enums. */
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99 #define ARM_DEFAULT_ABI ARM_ABI_AAPCS_LINUX
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100
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101 #undef TARGET_DEFAULT
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102 #define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT)
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103
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104 /* We do not have any MULTILIB_OPTIONS specified, so there are no
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105 MULTILIB_DEFAULTS. */
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106 #undef MULTILIB_DEFAULTS
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107
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108 /* Use the AAPCS type for wchar_t, override the one from config/freebsd.h. */
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109 #undef WCHAR_TYPE
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110 #define WCHAR_TYPE "unsigned int"
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0
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111
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112 #undef WCHAR_TYPE_SIZE
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113 #define WCHAR_TYPE_SIZE BITS_PER_WORD
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114
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115 /* FreeBSD 10 does not support unaligned access for armv6 and up.
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116 Unaligned access support was added in FreeBSD 11. */
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117 #if FBSD_MAJOR < 11
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118 #define SUBTARGET_OVERRIDE_INTERNAL_OPTIONS \
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119 do { \
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120 if (opts_set->x_unaligned_access == 1) \
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121 warning (0, "target OS does not support unaligned accesses"); \
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122 if (opts->x_unaligned_access) \
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123 opts->x_unaligned_access = 0; \
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124 } while (0)
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125 #endif
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126
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127 #undef MAX_SYNC_LIBFUNC_SIZE
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128 #define MAX_SYNC_LIBFUNC_SIZE 4 /* UNITS_PER_WORD not defined yet. */
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129
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130 /* FreeBSD does its profiling differently to the Acorn compiler. We
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131 don't need a word following the mcount call; and to skip it
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132 requires either an assembly stub or use of fomit-frame-pointer when
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133 compiling the profiling functions. Since we break Acorn CC
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134 compatibility below a little more won't hurt. */
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135
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136 #undef ARM_FUNCTION_PROFILER
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137 #define ARM_FUNCTION_PROFILER(STREAM,LABELNO) \
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138 { \
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139 asm_fprintf (STREAM, "\tmov\t%Rip, %Rlr\n"); \
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140 asm_fprintf (STREAM, "\tbl\t__mcount%s\n", \
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141 (TARGET_ARM && NEED_PLT_RELOC) \
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142 ? "(PLT)" : ""); \
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143 }
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144
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145 /* Clear the instruction cache from `BEG' to `END'. This makes a
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146 call to the ARM_SYNC_ICACHE architecture specific syscall. */
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147 #define CLEAR_INSN_CACHE(BEG, END) \
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148 do \
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149 { \
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150 extern int sysarch (int number, void *args); \
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151 struct \
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152 { \
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153 unsigned int addr; \
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154 int len; \
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155 } s; \
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156 s.addr = (unsigned int) (BEG); \
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157 s.len = (END) - (BEG); \
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158 (void) sysarch (0, &s); \
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159 } \
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160 while (0)
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0
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161
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162 /* This is how we tell the assembler that two symbols have the same value. */
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163 #define ASM_OUTPUT_DEF(FILE, NAME1, NAME2) \
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164 do \
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165 { \
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166 assemble_name (FILE, NAME1); \
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167 fputs (" = ", FILE); \
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168 assemble_name (FILE, NAME2); \
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169 fputc ('\n', FILE); \
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170 } \
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171 while (0)
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172
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173 /* Add .note.GNU-stack. */
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174 #undef NEED_INDICATE_EXEC_STACK
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175 #define NEED_INDICATE_EXEC_STACK 1
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176
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177 #define ARM_TARGET2_DWARF_FORMAT (DW_EH_PE_pcrel | DW_EH_PE_indirect)
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178
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