1 /* Definitions for MIPS systems using GNU userspace.
2 Copyright (C) 1998-2023 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 $gp-relative calls. */
94 #undef ASM_OUTPUT_REG_PUSH
95 #undef ASM_OUTPUT_REG_POP
96
97 #undef LIB_SPEC
98 #define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
99
100 #ifdef HAVE_AS_NO_SHARED
101 /* Default to -mno-shared for non-PIC. */
102 # define NO_SHARED_SPECS \
103 " %{mshared|mno-shared:;:%{" NO_FPIE_AND_FPIC_SPEC ":-mno-shared}}"
104 #else
105 # define NO_SHARED_SPECS ""
106 #endif
107
108 /* -march=native handling only makes sense with compiler running on
109 a MIPS chip. */
110 #if defined(__mips__)
111 extern const char *host_detect_local_cpu (int argc, const char **argv);
112 # define EXTRA_SPEC_FUNCTIONS \
113 { "local_cpu_detect", host_detect_local_cpu },
114
115 # define MARCH_MTUNE_NATIVE_SPECS \
116 " %{march=native:%<march=native %:local_cpu_detect(arch)}" \
117 " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
118 #else
119 # define MARCH_MTUNE_NATIVE_SPECS ""
120 #endif
121
122 #define LINUX_DRIVER_SELF_SPECS \
123 NO_SHARED_SPECS \
124 MARCH_MTUNE_NATIVE_SPECS, \
125 /* -mplt has no effect without -mno-shared. Simplify later \
126 specs handling by removing a redundant option. */ \
127 "%{!mno-shared:%<mplt}", \
128 /* -mplt likewise has no effect for -mabi=64 without -msym32. */ \
129 "%{mabi=64:%{!msym32:%<mplt}}", \
130 "%{!EB:%{!EL:%(endian_spec)}}", \
131 "%{!mabi=*: -" MULTILIB_ABI_DEFAULT "}"
132
133 #undef DRIVER_SELF_SPECS
134 #define DRIVER_SELF_SPECS \
135 MIPS_ISA_LEVEL_SPEC, \
136 BASE_DRIVER_SELF_SPECS, \
137 LINUX_DRIVER_SELF_SPECS
138
139 /* Similar to standard Linux, but adding -ffast-math support. */
140 #undef GNU_USER_TARGET_MATHFILE_SPEC
141 #define GNU_USER_TARGET_MATHFILE_SPEC \
142 "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}}"
143 #undef ENDFILE_SPEC
144 #define ENDFILE_SPEC \
145 GNU_USER_TARGET_MATHFILE_SPEC " " \
146 GNU_USER_TARGET_ENDFILE_SPEC
147
148 #undef LOCAL_LABEL_PREFIX
149 #define LOCAL_LABEL_PREFIX (TARGET_OLDABI ? "$" : ".")