Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/openbsd.h @ 88:f214c1d5b862
merge 89
author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Tue, 20 Dec 2011 18:53:46 +0900 |
parents | f6334be47118 |
children | 04ced10e8804 |
rev | line source |
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0 | 1 /* Base configuration file for all OpenBSD targets. |
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2 Copyright (C) 1999, 2000, 2004, 2005, 2007, 2009, 2010 |
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3 Free Software Foundation, Inc. |
0 | 4 |
5 This file is part of GCC. | |
6 | |
7 GCC is free software; you can redistribute it and/or modify | |
8 it under the terms of the GNU General Public License as published by | |
9 the Free Software Foundation; either version 3, or (at your option) | |
10 any later version. | |
11 | |
12 GCC is distributed in the hope that it will be useful, | |
13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 GNU General Public License for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with GCC; see the file COPYING3. If not see | |
19 <http://www.gnu.org/licenses/>. */ | |
20 | |
21 /* Common OpenBSD configuration. | |
22 All OpenBSD architectures include this file, which is intended as | |
23 a repository for common defines. | |
24 | |
25 Some defines are common to all architectures, a few of them are | |
26 triggered by OBSD_* guards, so that we won't override architecture | |
27 defaults by mistakes. | |
28 | |
29 OBSD_HAS_CORRECT_SPECS: | |
30 another mechanism provides correct specs already. | |
31 OBSD_NO_DYNAMIC_LIBRARIES: | |
32 no implementation of dynamic libraries. | |
33 OBSD_OLD_GAS: | |
34 older flavor of gas which needs help for PIC. | |
35 OBSD_HAS_DECLARE_FUNCTION_NAME, OBSD_HAS_DECLARE_FUNCTION_SIZE, | |
36 OBSD_HAS_DECLARE_OBJECT: | |
37 PIC support, FUNCTION_NAME/FUNCTION_SIZE are independent, whereas | |
38 the corresponding logic for OBJECTS is necessarily coupled. | |
39 | |
40 There are also a few `default' defines such as ASM_WEAKEN_LABEL, | |
41 intended as common ground for arch that don't provide | |
42 anything suitable. */ | |
43 | |
44 /* OPENBSD_NATIVE is defined only when gcc is configured as part of | |
45 the OpenBSD source tree, specifically through Makefile.bsd-wrapper. | |
46 | |
47 In such a case the include path can be trimmed as there is no | |
48 distinction between system includes and gcc includes. */ | |
49 | |
50 /* This configuration method, namely Makefile.bsd-wrapper and | |
51 OPENBSD_NATIVE is NOT recommended for building cross-compilers. */ | |
52 | |
53 #ifdef OPENBSD_NATIVE | |
54 | |
55 /* The compiler is configured with ONLY the gcc/g++ standard headers. */ | |
56 #undef INCLUDE_DEFAULTS | |
57 #define INCLUDE_DEFAULTS \ | |
58 { \ | |
59 { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 }, \ | |
60 { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1 }, \ | |
61 { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1 }, \ | |
62 { STANDARD_INCLUDE_DIR, STANDARD_INCLUDE_COMPONENT, 0, 0 }, \ | |
63 { 0, 0, 0, 0 } \ | |
64 } | |
65 | |
66 /* Under OpenBSD, the normal location of the various *crt*.o files is the | |
67 /usr/lib directory. */ | |
68 #undef STANDARD_STARTFILE_PREFIX | |
69 #define STANDARD_STARTFILE_PREFIX "/usr/local/lib/" | |
70 | |
71 #endif | |
72 | |
73 | |
74 /* Controlling the compilation driver. */ | |
75 /* TARGET_OS_CPP_BUILTINS() common to all OpenBSD targets. */ | |
76 #define OPENBSD_OS_CPP_BUILTINS() \ | |
77 do \ | |
78 { \ | |
79 builtin_define ("__OpenBSD__"); \ | |
80 builtin_define ("__unix__"); \ | |
81 builtin_define ("__ANSI_COMPAT"); \ | |
82 builtin_assert ("system=unix"); \ | |
83 builtin_assert ("system=bsd"); \ | |
84 builtin_assert ("system=OpenBSD"); \ | |
85 } \ | |
86 while (0) | |
87 | |
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88 /* TARGET_OS_CPP_BUILTINS() common to all OpenBSD ELF targets. */ |
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89 #define OPENBSD_OS_CPP_BUILTINS_ELF() \ |
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90 do \ |
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91 { \ |
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92 OPENBSD_OS_CPP_BUILTINS(); \ |
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93 builtin_define ("__ELF__"); \ |
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94 } \ |
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95 while (0) |
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96 |
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97 /* TARGET_OS_CPP_BUILTINS() common to all LP64 OpenBSD targets. */ |
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98 #define OPENBSD_OS_CPP_BUILTINS_LP64() \ |
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99 do \ |
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100 { \ |
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101 builtin_define ("_LP64"); \ |
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102 builtin_define ("__LP64__"); \ |
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103 } \ |
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104 while (0) |
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105 |
0 | 106 /* CPP_SPEC appropriate for OpenBSD. We deal with -posix and -pthread. |
107 XXX the way threads are handled currently is not very satisfying, | |
108 since all code must be compiled with -pthread to work. | |
109 This two-stage defines makes it easy to pick that for targets that | |
110 have subspecs. */ | |
111 #ifdef CPP_CPU_SPEC | |
112 #define OBSD_CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}" | |
113 #else | |
114 #define OBSD_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}" | |
115 #endif | |
116 | |
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117 #undef LIB_SPEC |
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118 #define LIB_SPEC OBSD_LIB_SPEC |
0 | 119 |
120 #ifndef OBSD_HAS_CORRECT_SPECS | |
121 | |
122 #undef CPP_SPEC | |
123 #define CPP_SPEC OBSD_CPP_SPEC | |
124 | |
125 #ifdef OBSD_OLD_GAS | |
126 /* ASM_SPEC appropriate for OpenBSD. For some architectures, OpenBSD | |
127 still uses a special flavor of gas that needs to be told when generating | |
128 pic code. */ | |
129 #undef ASM_SPEC | |
130 #define ASM_SPEC "%{fpic|fpie:-k} %{fPIC|fPIE:-k -K}" | |
131 #endif | |
132 | |
133 /* Since we use gas, stdin -> - is a good idea. */ | |
134 #define AS_NEEDS_DASH_FOR_PIPED_INPUT | |
135 | |
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136 #undef LIB_SPEC |
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137 #define LIB_SPEC OBSD_LIB_SPEC |
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138 |
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139 #if defined(HAVE_LD_EH_FRAME_HDR) |
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140 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " |
0 | 141 #endif |
142 | |
143 #undef LIB_SPEC | |
144 #define LIB_SPEC OBSD_LIB_SPEC | |
145 #endif | |
146 | |
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147 #define TARGET_POSIX_IO |
0 | 148 |
149 /* Runtime target specification. */ | |
150 | |
151 /* Miscellaneous parameters. */ | |
152 | |
153 /* Controlling debugging info: dbx options. */ | |
154 | |
155 /* Don't use the `xsTAG;' construct in DBX output; OpenBSD systems that | |
156 use DBX don't support it. */ | |
157 #define DBX_NO_XREFS | |
158 | |
159 | |
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160 /* - we use . - _func instead of a local label, |
0 | 161 - we put extra spaces in expressions such as |
162 .type _func , @function | |
163 This is more readable for a human being and confuses c++filt less. */ | |
164 | |
165 /* Assembler format: output and generation of labels. */ | |
166 | |
167 /* Define the strings used for the .type and .size directives. | |
168 These strings generally do not vary from one system running OpenBSD | |
169 to another, but if a given system needs to use different pseudo-op | |
170 names for these, they may be overridden in the arch specific file. */ | |
171 | |
172 /* OpenBSD assembler is hacked to have .type & .size support even in a.out | |
173 format object files. Functions size are supported but not activated | |
174 yet (look for GRACE_PERIOD_EXPIRED in gas/config/obj-aout.c). | |
175 SET_ASM_OP is needed for attribute alias to work. */ | |
176 | |
177 #undef TYPE_ASM_OP | |
178 #undef SIZE_ASM_OP | |
179 #undef SET_ASM_OP | |
180 #undef GLOBAL_ASM_OP | |
181 | |
182 #define TYPE_ASM_OP "\t.type\t" | |
183 #define SIZE_ASM_OP "\t.size\t" | |
184 #define SET_ASM_OP "\t.set\t" | |
185 #define GLOBAL_ASM_OP "\t.globl\t" | |
186 | |
187 /* The following macro defines the format used to output the second | |
188 operand of the .type assembler directive. */ | |
189 #undef TYPE_OPERAND_FMT | |
190 #define TYPE_OPERAND_FMT "@%s" | |
191 | |
192 /* Provision if extra assembler code is needed to declare a function's result | |
193 (taken from svr4, not needed yet actually). */ | |
194 #ifndef ASM_DECLARE_RESULT | |
195 #define ASM_DECLARE_RESULT(FILE, RESULT) | |
196 #endif | |
197 | |
198 /* These macros generate the special .type and .size directives which | |
199 are used to set the corresponding fields of the linker symbol table | |
200 entries under OpenBSD. These macros also have to output the starting | |
201 labels for the relevant functions/objects. */ | |
202 | |
203 #ifndef OBSD_HAS_DECLARE_FUNCTION_NAME | |
204 /* Extra assembler code needed to declare a function properly. | |
205 Some assemblers may also need to also have something extra said | |
206 about the function's return value. We allow for that here. */ | |
207 #undef ASM_DECLARE_FUNCTION_NAME | |
208 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ | |
209 do { \ | |
210 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ | |
211 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ | |
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212 ASM_OUTPUT_FUNCTION_LABEL (FILE, NAME, DECL); \ |
0 | 213 } while (0) |
214 #endif | |
215 | |
216 #ifndef OBSD_HAS_DECLARE_FUNCTION_SIZE | |
217 /* Declare the size of a function. */ | |
218 #undef ASM_DECLARE_FUNCTION_SIZE | |
219 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ | |
220 do { \ | |
221 if (!flag_inhibit_size_directive) \ | |
222 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ | |
223 } while (0) | |
224 #endif | |
225 | |
226 #ifndef OBSD_HAS_DECLARE_OBJECT | |
227 /* Extra assembler code needed to declare an object properly. */ | |
228 #undef ASM_DECLARE_OBJECT_NAME | |
229 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ | |
230 do { \ | |
231 HOST_WIDE_INT size; \ | |
232 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ | |
233 size_directive_output = 0; \ | |
234 if (!flag_inhibit_size_directive \ | |
235 && (DECL) && DECL_SIZE (DECL)) \ | |
236 { \ | |
237 size_directive_output = 1; \ | |
238 size = int_size_in_bytes (TREE_TYPE (DECL)); \ | |
239 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \ | |
240 } \ | |
241 ASM_OUTPUT_LABEL (FILE, NAME); \ | |
242 } while (0) | |
243 | |
244 /* Output the size directive for a decl in rest_of_decl_compilation | |
245 in the case where we did not do so before the initializer. | |
246 Once we find the error_mark_node, we know that the value of | |
247 size_directive_output was set by ASM_DECLARE_OBJECT_NAME | |
248 when it was run for the same decl. */ | |
249 #undef ASM_FINISH_DECLARE_OBJECT | |
250 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ | |
251 do { \ | |
252 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ | |
253 HOST_WIDE_INT size; \ | |
254 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ | |
255 && ! AT_END && TOP_LEVEL \ | |
256 && DECL_INITIAL (DECL) == error_mark_node \ | |
257 && !size_directive_output) \ | |
258 { \ | |
259 size_directive_output = 1; \ | |
260 size = int_size_in_bytes (TREE_TYPE (DECL)); \ | |
261 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \ | |
262 } \ | |
263 } while (0) | |
264 #endif | |
265 | |
266 | |
267 /* Those are `generic' ways to weaken/globalize a label. We shouldn't need | |
268 to override a processor specific definition. Hence, #ifndef ASM_* | |
269 In case overriding turns out to be needed, one can always #undef ASM_* | |
270 before including this file. */ | |
271 | |
272 /* Tell the assembler that a symbol is weak. */ | |
273 /* Note: netbsd arm32 assembler needs a .globl here. An override may | |
274 be needed when/if we go for arm32 support. */ | |
275 #ifndef ASM_WEAKEN_LABEL | |
276 #define ASM_WEAKEN_LABEL(FILE,NAME) \ | |
277 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ | |
278 fputc ('\n', FILE); } while (0) | |
279 #endif | |
280 | |
281 /* Storage layout. */ | |
282 | |
283 | |
284 /* Stack is explicitly denied execution rights on OpenBSD platforms. */ | |
285 #define ENABLE_EXECUTE_STACK \ | |
286 extern void __enable_execute_stack (void *); \ | |
287 void \ | |
288 __enable_execute_stack (void *addr) \ | |
289 { \ | |
290 long size = getpagesize (); \ | |
291 long mask = ~(size-1); \ | |
292 char *page = (char *) (((long) addr) & mask); \ | |
293 char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ | |
294 \ | |
295 if (mprotect (page, end - page, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) \ | |
296 perror ("mprotect of trampoline code"); \ | |
297 } | |
298 | |
299 #include <sys/types.h> | |
300 #include <sys/mman.h> |