1 /* Definitions for MIPS systems using GNU userspace. 2 Copyright (C) 1998-2020 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GCC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #undef WCHAR_TYPE 21 #define WCHAR_TYPE "int" 22 23 #undef WCHAR_TYPE_SIZE 24 #define WCHAR_TYPE_SIZE 32 25 26 #undef ASM_DECLARE_OBJECT_NAME 27 #define ASM_DECLARE_OBJECT_NAME mips_declare_object_name 28 29 /* If we don't set MASK_ABICALLS, we can't default to PIC. */ 30 #undef TARGET_DEFAULT 31 #define TARGET_DEFAULT MASK_ABICALLS 32 33 #define TARGET_OS_CPP_BUILTINS() \ 34 do { \ 35 GNU_USER_TARGET_OS_CPP_BUILTINS(); \ 36 /* The GNU C++ standard library requires this. */ \ 37 if (c_dialect_cxx ()) \ 38 builtin_define ("_GNU_SOURCE"); \ 39 } while (0) 40 41 #undef SUBTARGET_CPP_SPEC 42 #define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}" 43 44 /* A standard GNU/Linux mapping. On most targets, it is included in 45 CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC 46 and provides this hook instead. */ 47 #undef SUBTARGET_CC1_SPEC 48 #define SUBTARGET_CC1_SPEC GNU_USER_TARGET_CC1_SPEC 49 50 /* -G is incompatible with -KPIC which is the default, so only allow objects 51 in the small data section if the user explicitly asks for it. */ 52 #undef MIPS_DEFAULT_GVALUE 53 #define MIPS_DEFAULT_GVALUE 0 54 55 #undef GNU_USER_TARGET_LINK_SPEC 56 #define GNU_USER_TARGET_LINK_SPEC "\ 57 %{G*} %{EB} %{EL} %{mips*} %{shared} \ 58 %{!shared: \ 59 %{!static: \ 60 %{rdynamic:-export-dynamic} \ 61 %{mabi=n32: -dynamic-linker " GNU_USER_DYNAMIC_LINKERN32 "} \ 62 %{mabi=64: -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \ 63 %{mabi=32: -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \ 64 %{static}} \ 65 %{mabi=n32:-m" GNU_USER_LINK_EMULATIONN32 "} \ 66 %{mabi=64:-m" GNU_USER_LINK_EMULATION64 "} \ 67 %{mabi=32:-m" GNU_USER_LINK_EMULATION32 "}" 68 69 #undef LINK_SPEC 70 #define LINK_SPEC GNU_USER_TARGET_LINK_SPEC 71 72 #undef SUBTARGET_ASM_SPEC 73 #define SUBTARGET_ASM_SPEC \ 74 "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}" 75 76 /* The MIPS assembler has different syntax for .set. We set it to 77 .dummy to trap any errors. */ 78 #undef SET_ASM_OP 79 #define SET_ASM_OP "\t.dummy\t" 80 81 #undef ASM_OUTPUT_DEF 82 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 83 do { \ 84 fputc ( '\t', FILE); \ 85 assemble_name (FILE, LABEL1); \ 86 fputs ( " = ", FILE); \ 87 assemble_name (FILE, LABEL2); \ 88 fputc ( '\n', FILE); \ 89 } while (0) 90 91 /* The glibc _mcount stub will save $v0 for us. Don't mess with saving 92 it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the 93 presence of $gp-relative calls. */ 94 #undef ASM_OUTPUT_REG_PUSH 95 #undef ASM_OUTPUT_REG_POP 96 97 #undef LIB_SPEC 98 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC 99 100 #ifdef HAVE_AS_NO_SHARED 101 /* Default to -mno-shared for non-PIC. */ 102 # define NO_SHARED_SPECS \ 103 " %{mshared|mno-shared:;:%{" NO_FPIE_AND_FPIC_SPEC ":-mno-shared}}" 104 #else 105 # define NO_SHARED_SPECS "" 106 #endif 107 108 /* -march=native handling only makes sense with compiler running on 109 a MIPS chip. */ 110 #if defined(__mips__) 111 extern const char *host_detect_local_cpu (int argc, const char **argv); 112 # define EXTRA_SPEC_FUNCTIONS \ 113 { "local_cpu_detect", host_detect_local_cpu }, 114 115 # define MARCH_MTUNE_NATIVE_SPECS \ 116 " %{march=native:%<march=native %:local_cpu_detect(arch)}" \ 117 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}" 118 #else 119 # define MARCH_MTUNE_NATIVE_SPECS "" 120 #endif 121 122 #define LINUX_DRIVER_SELF_SPECS \ 123 NO_SHARED_SPECS \ 124 MARCH_MTUNE_NATIVE_SPECS, \ 125 /* -mplt has no effect without -mno-shared. Simplify later \ 126 specs handling by removing a redundant option. */ \ 127 "%{!mno-shared:%<mplt}", \ 128 /* -mplt likewise has no effect for -mabi=64 without -msym32. */ \ 129 "%{mabi=64:%{!msym32:%<mplt}}", \ 130 "%{!EB:%{!EL:%(endian_spec)}}", \ 131 "%{!mabi=*: -" MULTILIB_ABI_DEFAULT "}" 132 133 #undef DRIVER_SELF_SPECS 134 #define DRIVER_SELF_SPECS \ 135 MIPS_ISA_LEVEL_SPEC, \ 136 BASE_DRIVER_SELF_SPECS, \ 137 LINUX_DRIVER_SELF_SPECS 138 139 /* Similar to standard Linux, but adding -ffast-math support. */ 140 #undef GNU_USER_TARGET_MATHFILE_SPEC 141 #define GNU_USER_TARGET_MATHFILE_SPEC \ 142 "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}" 143 #undef ENDFILE_SPEC 144 #define ENDFILE_SPEC \ 145 GNU_USER_TARGET_MATHFILE_SPEC " " \ 146 GNU_USER_TARGET_ENDFILE_SPEC 147 148 #undef LOCAL_LABEL_PREFIX 149 #define LOCAL_LABEL_PREFIX (TARGET_OLDABI ? "$" : ".") 150