1/* Definitions for MIPS systems using GNU userspace.
2   Copyright (C) 1998-2015 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 3, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along 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 $gp-relative calls.  */
94#undef ASM_OUTPUT_REG_PUSH
95#undef ASM_OUTPUT_REG_POP
96
97#undef LIB_SPEC
98#define LIB_SPEC GNU_USER_TARGET_LIB_SPEC
99
100#ifdef HAVE_AS_NO_SHARED
101/* Default to -mno-shared for non-PIC.  */
102# define NO_SHARED_SPECS \
103  " %{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
104#else
105# define NO_SHARED_SPECS ""
106#endif
107
108/* -march=native handling only makes sense with compiler running on
109   a MIPS chip.  */
110#if defined(__mips__)
111extern const char *host_detect_local_cpu (int argc, const char **argv);
112# define EXTRA_SPEC_FUNCTIONS \
113  { "local_cpu_detect", host_detect_local_cpu },
114
115# define MARCH_MTUNE_NATIVE_SPECS				\
116  " %{march=native:%<march=native %:local_cpu_detect(arch)}"	\
117  " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
118#else
119# define MARCH_MTUNE_NATIVE_SPECS ""
120#endif
121
122#define LINUX_DRIVER_SELF_SPECS \
123  NO_SHARED_SPECS							\
124  MARCH_MTUNE_NATIVE_SPECS,						\
125  /* -mplt has no effect without -mno-shared.  Simplify later		\
126     specs handling by removing a redundant option.  */			\
127  "%{!mno-shared:%<mplt}",						\
128  /* -mplt likewise has no effect for -mabi=64 without -msym32.  */	\
129  "%{mabi=64:%{!msym32:%<mplt}}",					\
130  "%{!EB:%{!EL:%(endian_spec)}}",					\
131  "%{!mabi=*: -" MULTILIB_ABI_DEFAULT "}"
132
133#undef DRIVER_SELF_SPECS
134#define DRIVER_SELF_SPECS \
135  MIPS_ISA_LEVEL_SPEC,    \
136  BASE_DRIVER_SELF_SPECS, \
137  LINUX_DRIVER_SELF_SPECS
138
139/* Similar to standard Linux, but adding -ffast-math support.  */
140#undef	GNU_USER_TARGET_MATHFILE_SPEC
141#define GNU_USER_TARGET_MATHFILE_SPEC \
142  "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
143#undef  ENDFILE_SPEC
144#define ENDFILE_SPEC \
145  GNU_USER_TARGET_MATHFILE_SPEC " " \
146  GNU_USER_TARGET_ENDFILE_SPEC
147
148#undef LOCAL_LABEL_PREFIX
149#define LOCAL_LABEL_PREFIX (TARGET_OLDABI ? "$" : ".")
150