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111
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1 /* Definitions for MIPS systems using GNU userspace.
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145
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2 Copyright (C) 1998-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #undef WCHAR_TYPE
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21 #define WCHAR_TYPE "int"
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22
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23 #undef WCHAR_TYPE_SIZE
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24 #define WCHAR_TYPE_SIZE 32
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25
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26 #undef ASM_DECLARE_OBJECT_NAME
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27 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
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28
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29 /* If we don't set MASK_ABICALLS, we can't default to PIC. */
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30 #undef TARGET_DEFAULT
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31 #define TARGET_DEFAULT MASK_ABICALLS
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32
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33 #define TARGET_OS_CPP_BUILTINS() \
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34 do { \
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35 GNU_USER_TARGET_OS_CPP_BUILTINS(); \
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36 /* The GNU C++ standard library requires this. */ \
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37 if (c_dialect_cxx ()) \
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38 builtin_define ("_GNU_SOURCE"); \
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39 } while (0)
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40
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41 #undef SUBTARGET_CPP_SPEC
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42 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
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43
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44 /* A standard GNU/Linux mapping. On most targets, it is included in
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45 CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
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46 and provides this hook instead. */
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47 #undef SUBTARGET_CC1_SPEC
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48 #define SUBTARGET_CC1_SPEC GNU_USER_TARGET_CC1_SPEC
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49
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50 /* -G is incompatible with -KPIC which is the default, so only allow objects
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51 in the small data section if the user explicitly asks for it. */
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52 #undef MIPS_DEFAULT_GVALUE
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53 #define MIPS_DEFAULT_GVALUE 0
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54
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55 #undef GNU_USER_TARGET_LINK_SPEC
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56 #define GNU_USER_TARGET_LINK_SPEC "\
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57 %{G*} %{EB} %{EL} %{mips*} %{shared} \
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58 %{!shared: \
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59 %{!static: \
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60 %{rdynamic:-export-dynamic} \
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61 %{mabi=n32: -dynamic-linker " GNU_USER_DYNAMIC_LINKERN32 "} \
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62 %{mabi=64: -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
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63 %{mabi=32: -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \
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64 %{static}} \
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65 %{mabi=n32:-m" GNU_USER_LINK_EMULATIONN32 "} \
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66 %{mabi=64:-m" GNU_USER_LINK_EMULATION64 "} \
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67 %{mabi=32:-m" GNU_USER_LINK_EMULATION32 "}"
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68
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69 #undef LINK_SPEC
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70 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC
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71
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72 #undef SUBTARGET_ASM_SPEC
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73 #define SUBTARGET_ASM_SPEC \
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74 "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
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75
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76 /* The MIPS assembler has different syntax for .set. We set it to
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77 .dummy to trap any errors. */
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78 #undef SET_ASM_OP
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79 #define SET_ASM_OP "\t.dummy\t"
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80
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81 #undef ASM_OUTPUT_DEF
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82 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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83 do { \
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84 fputc ( '\t', FILE); \
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85 assemble_name (FILE, LABEL1); \
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86 fputs ( " = ", FILE); \
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87 assemble_name (FILE, LABEL2); \
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88 fputc ( '\n', FILE); \
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89 } while (0)
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90
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91 /* The glibc _mcount stub will save $v0 for us. Don't mess with saving
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92 it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
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93 presence of $gp-relative calls. */
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94 #undef ASM_OUTPUT_REG_PUSH
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95 #undef ASM_OUTPUT_REG_POP
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96
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97 #undef LIB_SPEC
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98 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
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99
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100 #ifdef HAVE_AS_NO_SHARED
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101 /* Default to -mno-shared for non-PIC. */
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102 # define NO_SHARED_SPECS \
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103 " %{mshared|mno-shared:;:%{" NO_FPIE_AND_FPIC_SPEC ":-mno-shared}}"
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104 #else
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105 # define NO_SHARED_SPECS ""
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106 #endif
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107
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108 /* -march=native handling only makes sense with compiler running on
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109 a MIPS chip. */
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110 #if defined(__mips__)
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111 extern const char *host_detect_local_cpu (int argc, const char **argv);
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112 # define EXTRA_SPEC_FUNCTIONS \
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113 { "local_cpu_detect", host_detect_local_cpu },
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114
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115 # define MARCH_MTUNE_NATIVE_SPECS \
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116 " %{march=native:%<march=native %:local_cpu_detect(arch)}" \
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117 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
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118 #else
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119 # define MARCH_MTUNE_NATIVE_SPECS ""
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120 #endif
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121
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122 #define LINUX_DRIVER_SELF_SPECS \
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123 NO_SHARED_SPECS \
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124 MARCH_MTUNE_NATIVE_SPECS, \
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125 /* -mplt has no effect without -mno-shared. Simplify later \
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126 specs handling by removing a redundant option. */ \
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127 "%{!mno-shared:%<mplt}", \
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128 /* -mplt likewise has no effect for -mabi=64 without -msym32. */ \
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129 "%{mabi=64:%{!msym32:%<mplt}}", \
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130 "%{!EB:%{!EL:%(endian_spec)}}", \
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131 "%{!mabi=*: -" MULTILIB_ABI_DEFAULT "}"
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132
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133 #undef DRIVER_SELF_SPECS
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134 #define DRIVER_SELF_SPECS \
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135 MIPS_ISA_LEVEL_SPEC, \
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136 BASE_DRIVER_SELF_SPECS, \
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137 LINUX_DRIVER_SELF_SPECS
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138
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139 /* Similar to standard Linux, but adding -ffast-math support. */
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140 #undef GNU_USER_TARGET_MATHFILE_SPEC
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141 #define GNU_USER_TARGET_MATHFILE_SPEC \
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142 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
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143 #undef ENDFILE_SPEC
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144 #define ENDFILE_SPEC \
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145 GNU_USER_TARGET_MATHFILE_SPEC " " \
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146 GNU_USER_TARGET_ENDFILE_SPEC
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147
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148 #undef LOCAL_LABEL_PREFIX
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149 #define LOCAL_LABEL_PREFIX (TARGET_OLDABI ? "$" : ".")
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