freebsd.h revision 182654 
1/* Definitions for MIPS varients running FreeBSD with ELF format
2   Copyright (C) 2008 Free Software Foundation, Inc.
3   Continued by David O'Brien <obrien@freebsd.org>
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22/* $FreeBSD$ */
23
24/* This defines which switch letters take arguments.  -G is a MIPS
25   special.  */
26
27#undef  SWITCH_TAKES_ARG
28#define SWITCH_TAKES_ARG(CHAR)		\
29  (FBSD_SWITCH_TAKES_ARG (CHAR)		\
30   || (CHAR) == 'R'			\
31   || (CHAR) == 'G')
32
33#undef  SUBTARGET_EXTRA_SPECS	/* mips.h bogusly defines it.  */
34#define SUBTARGET_EXTRA_SPECS \
35  { "fbsd_dynamic_linker",	FBSD_DYNAMIC_LINKER}, \
36  { "fbsd_link_spec",		FBSD_LINK_SPEC }
37
38/* config/mips/mips.h defines CC1_SPEC,
39   but gives us an "out" with SUBTARGET_CC1_SPEC.  */
40#undef  SUBTARGET_CC1_SPEC
41#define SUBTARGET_CC1_SPEC "%{profile:-p}"
42
43/* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
44   for the special GCC options -static and -shared, which allow us to
45   link things in one of these three modes by applying the appropriate
46   combinations of options at link-time. We like to support here for
47   as many of the other GNU linker options as possible. But I don't
48   have the time to search for those flags. I am sure how to add
49   support for -soname shared_object_name. H.J.
50
51   When the -shared link option is used a final link is not being
52   done.  */
53
54#define FBSD_LINK_SPEC "\
55    %{p:%nconsider using `-pg' instead of `-p' with gprof(1) } \
56    %{v:-V} \
57    %{assert*} %{R*} %{rpath*} %{defsym*} \
58    %{shared:-Bshareable %{h*} %{soname*}} \
59    %{!shared: \
60      %{!static: \
61	%{rdynamic: -export-dynamic} \
62	%{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \
63      %{static:-Bstatic}} \
64    %{symbolic:-Bsymbolic} "
65
66#undef	LINK_SPEC
67#define LINK_SPEC "\
68    %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32} %{mips32r2} %{mips64} \
69    %{bestGnum} %{call_shared} %{no_archive} %{exact_version} \
70    %(fbsd_link_spec) "
71#if 0
72    %(endian_spec)
73#endif
74
75/* Reset our STARTFILE_SPEC which was properly set in config/freebsd.h
76   but trashed by config/mips/elf.h.  */
77#undef  STARTFILE_SPEC
78#define STARTFILE_SPEC	FBSD_STARTFILE_SPEC
79
80/* Provide an ENDFILE_SPEC appropriate for FreeBSD/i386.  */
81#undef  ENDFILE_SPEC
82#define ENDFILE_SPEC	FBSD_ENDFILE_SPEC
83
84/* Reset our LIB_SPEC which was properly set in config/freebsd.h
85   but trashed by config/mips/elf.h.  */
86#undef  LIB_SPEC
87#define LIB_SPEC	FBSD_LIB_SPEC
88
89/* config/mips/mips.h defines CPP_SPEC, and it expects SUBTARGET_CPP_SPEC.  */
90#undef  SUBTARGET_CPP_SPEC
91#define SUBTARGET_CPP_SPEC FBSD_CPP_SPEC
92
93
94/************************[  Target stuff  ]***********************************/
95
96/* Define the actual types of some ANSI-mandated types.
97   Needs to agree with <machine/ansi.h>.  GCC defaults come from c-decl.c,
98   c-common.c, and config/<arch>/<arch>.h.  */
99
100#if TARGET_ENDIAN_DEFAULT != 0
101#define TARGET_VERSION	fprintf (stderr, " (FreeBSD/mips)");
102#else
103#define TARGET_VERSION	fprintf (stderr, " (FreeBSD/mipsel)");
104#endif
105
106/* The generic MIPS TARGET_CPU_CPP_BUILTINS are incorrect for FreeBSD.
107   Specifically, they define too many namespace-invasive macros.  Override
108   them here.  Note this is structured for easy comparison to the version
109   in mips.h.  */
110
111#undef  TARGET_CPU_CPP_BUILTINS
112#define TARGET_CPU_CPP_BUILTINS()				\
113  do								\
114    {								\
115      builtin_assert ("machine=mips");				\
116      builtin_assert ("cpu=mips");				\
117      builtin_define ("__mips__");				\
118								\
119      if (TARGET_64BIT)						\
120	builtin_define ("__mips64__");				\
121								\
122      if (TARGET_FLOAT64)					\
123	builtin_define ("__mips_fpr=64");			\
124      else							\
125	builtin_define ("__mips_fpr=32");			\
126								\
127      if (TARGET_MIPS16)					\
128	builtin_define ("__mips16");				\
129								\
130      MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info);	\
131      MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info);	\
132								\
133      if (ISA_MIPS3)						\
134	builtin_define ("__mips=3");				\
135      else if (ISA_MIPS4)					\
136	builtin_define ("__mips=4");				\
137      else if (ISA_MIPS32)					\
138	{							\
139	  builtin_define ("__mips=32");				\
140	  builtin_define ("__mips_isa_rev=1");			\
141	}							\
142      else if (ISA_MIPS32R2)					\
143	{							\
144	  builtin_define ("__mips=32");				\
145	  builtin_define ("__mips_isa_rev=2");			\
146	}							\
147      else if (ISA_MIPS64)					\
148	{							\
149	  builtin_define ("__mips=64");				\
150	  builtin_define ("__mips_isa_rev=1");			\
151	}							\
152								\
153      if (TARGET_HARD_FLOAT)					\
154	builtin_define ("__mips_hard_float");			\
155      else if (TARGET_SOFT_FLOAT)				\
156	builtin_define ("__mips_soft_float");			\
157								\
158      if (TARGET_SINGLE_FLOAT)					\
159	builtin_define ("__mips_single_float");			\
160								\
161      if (TARGET_BIG_ENDIAN)					\
162	builtin_define ("__MIPSEB__");				\
163      else							\
164	builtin_define ("__MIPSEL__");				\
165								\
166      /* No language dialect defines.  */			\
167								\
168      if (mips_abi == ABI_EABI)					\
169	builtin_define ("__mips_eabi");				\
170      else if (mips_abi == ABI_N32)				\
171	builtin_define ("__mips_n32");				\
172      else if (mips_abi == ABI_64)				\
173	builtin_define ("__mips_n64");				\
174      else if (mips_abi == ABI_O64)				\
175	builtin_define ("__mips_o64");				\
176      else							\
177	builtin_define ("__mips_o32");				\
178								\
179      if (TARGET_ABICALLS)					\
180	builtin_define ("__ABICALLS__");			\
181    }								\
182  while (0)
183
184/* Default to the mips32 ISA */
185#undef  DRIVER_SELF_SPECS
186#define DRIVER_SELF_SPECS \
187  "%{!march=*: -march=mips32}"
188#if 0
189  "%{!EB:%{!EL:%(endian_spec)}}",
190#endif
191
192#if 0
193/* Don't default to pcc-struct-return, we want to retain compatibility with
194   older gcc versions AND pcc-struct-return is nonreentrant.
195   (even though the SVR4 ABI for the i386 says that records and unions are
196   returned in memory).  */
197
198#undef  DEFAULT_PCC_STRUCT_RETURN
199#define DEFAULT_PCC_STRUCT_RETURN 0
200#endif
201
202
203/************************[  Assembler stuff  ]********************************/
204
205#undef  SUBTARGET_ASM_SPEC
206#define SUBTARGET_ASM_SPEC \
207  "%{!mno-abicalls: %{!fno-PIC:%{!fno-pic:-KPIC}}}"
208
209/* -G is incompatible with -KPIC which is the default, so only allow objects
210   in the small data section if the user explicitly asks for it.  */
211
212#undef  MIPS_DEFAULT_GVALUE
213#define MIPS_DEFAULT_GVALUE 0
214
215/* If defined, a C expression whose value is a string containing the
216   assembler operation to identify the following data as
217   uninitialized global data.  If not defined, and neither
218   `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined,
219   uninitialized global data will be output in the data section if
220   `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be
221   used.  */
222#undef  BSS_SECTION_ASM_OP
223#define BSS_SECTION_ASM_OP "\t.section\t.bss"
224
225/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a
226   separate, explicit argument.  If you define this macro, it is used
227   in place of `ASM_OUTPUT_BSS', and gives you more flexibility in
228   handling the required alignment of the variable.  The alignment is
229   specified as the number of bits.
230
231   Try to use function `asm_output_aligned_bss' defined in file
232   `varasm.c' when defining this macro.  */
233#undef  ASM_OUTPUT_ALIGNED_BSS
234#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
235  asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
236
237/* Standard AT&T UNIX 'as' local label spelling.  */
238#undef  LOCAL_LABEL_PREFIX
239#define LOCAL_LABEL_PREFIX "."
240
241
242/************************[  Debugger stuff  ]*********************************/
243
244