Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/openbsd.h @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Fri, 12 Feb 2010 23:39:51 +0900 |
parents | a06113de4d67 |
children | f6334be47118 |
rev | line source |
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0 | 1 /* Base configuration file for all OpenBSD targets. |
2 Copyright (C) 1999, 2000, 2004, 2005, 2007 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 /* Common OpenBSD configuration. | |
21 All OpenBSD architectures include this file, which is intended as | |
22 a repository for common defines. | |
23 | |
24 Some defines are common to all architectures, a few of them are | |
25 triggered by OBSD_* guards, so that we won't override architecture | |
26 defaults by mistakes. | |
27 | |
28 OBSD_HAS_CORRECT_SPECS: | |
29 another mechanism provides correct specs already. | |
30 OBSD_NO_DYNAMIC_LIBRARIES: | |
31 no implementation of dynamic libraries. | |
32 OBSD_OLD_GAS: | |
33 older flavor of gas which needs help for PIC. | |
34 OBSD_HAS_DECLARE_FUNCTION_NAME, OBSD_HAS_DECLARE_FUNCTION_SIZE, | |
35 OBSD_HAS_DECLARE_OBJECT: | |
36 PIC support, FUNCTION_NAME/FUNCTION_SIZE are independent, whereas | |
37 the corresponding logic for OBJECTS is necessarily coupled. | |
38 | |
39 There are also a few `default' defines such as ASM_WEAKEN_LABEL, | |
40 intended as common ground for arch that don't provide | |
41 anything suitable. */ | |
42 | |
43 /* OPENBSD_NATIVE is defined only when gcc is configured as part of | |
44 the OpenBSD source tree, specifically through Makefile.bsd-wrapper. | |
45 | |
46 In such a case the include path can be trimmed as there is no | |
47 distinction between system includes and gcc includes. */ | |
48 | |
49 /* This configuration method, namely Makefile.bsd-wrapper and | |
50 OPENBSD_NATIVE is NOT recommended for building cross-compilers. */ | |
51 | |
52 #ifdef OPENBSD_NATIVE | |
53 | |
54 /* The compiler is configured with ONLY the gcc/g++ standard headers. */ | |
55 #undef INCLUDE_DEFAULTS | |
56 #define INCLUDE_DEFAULTS \ | |
57 { \ | |
58 { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1 }, \ | |
59 { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1 }, \ | |
60 { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1 }, \ | |
61 { STANDARD_INCLUDE_DIR, STANDARD_INCLUDE_COMPONENT, 0, 0 }, \ | |
62 { 0, 0, 0, 0 } \ | |
63 } | |
64 | |
65 /* Under OpenBSD, the normal location of the various *crt*.o files is the | |
66 /usr/lib directory. */ | |
67 #undef STANDARD_STARTFILE_PREFIX | |
68 #define STANDARD_STARTFILE_PREFIX "/usr/local/lib/" | |
69 | |
70 #endif | |
71 | |
72 | |
73 /* Controlling the compilation driver. */ | |
74 /* TARGET_OS_CPP_BUILTINS() common to all OpenBSD targets. */ | |
75 #define OPENBSD_OS_CPP_BUILTINS() \ | |
76 do \ | |
77 { \ | |
78 builtin_define ("__OpenBSD__"); \ | |
79 builtin_define ("__unix__"); \ | |
80 builtin_define ("__ANSI_COMPAT"); \ | |
81 builtin_assert ("system=unix"); \ | |
82 builtin_assert ("system=bsd"); \ | |
83 builtin_assert ("system=OpenBSD"); \ | |
84 } \ | |
85 while (0) | |
86 | |
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87 /* TARGET_OS_CPP_BUILTINS() common to all OpenBSD ELF targets. */ |
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88 #define OPENBSD_OS_CPP_BUILTINS_ELF() \ |
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89 do \ |
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90 { \ |
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91 OPENBSD_OS_CPP_BUILTINS(); \ |
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92 builtin_define ("__ELF__"); \ |
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93 } \ |
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94 while (0) |
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95 |
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96 /* TARGET_OS_CPP_BUILTINS() common to all LP64 OpenBSD targets. */ |
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97 #define OPENBSD_OS_CPP_BUILTINS_LP64() \ |
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98 do \ |
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99 { \ |
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100 builtin_define ("_LP64"); \ |
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101 builtin_define ("__LP64__"); \ |
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102 } \ |
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103 while (0) |
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104 |
0 | 105 /* CPP_SPEC appropriate for OpenBSD. We deal with -posix and -pthread. |
106 XXX the way threads are handled currently is not very satisfying, | |
107 since all code must be compiled with -pthread to work. | |
108 This two-stage defines makes it easy to pick that for targets that | |
109 have subspecs. */ | |
110 #ifdef CPP_CPU_SPEC | |
111 #define OBSD_CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}" | |
112 #else | |
113 #define OBSD_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}" | |
114 #endif | |
115 | |
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116 #undef LIB_SPEC |
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117 #define LIB_SPEC OBSD_LIB_SPEC |
0 | 118 |
119 #ifndef OBSD_HAS_CORRECT_SPECS | |
120 | |
121 #ifndef OBSD_NO_DYNAMIC_LIBRARIES | |
122 #undef SWITCH_TAKES_ARG | |
123 #define SWITCH_TAKES_ARG(CHAR) \ | |
124 (DEFAULT_SWITCH_TAKES_ARG (CHAR) \ | |
125 || (CHAR) == 'R') | |
126 #endif | |
127 | |
128 #undef CPP_SPEC | |
129 #define CPP_SPEC OBSD_CPP_SPEC | |
130 | |
131 #ifdef OBSD_OLD_GAS | |
132 /* ASM_SPEC appropriate for OpenBSD. For some architectures, OpenBSD | |
133 still uses a special flavor of gas that needs to be told when generating | |
134 pic code. */ | |
135 #undef ASM_SPEC | |
136 #define ASM_SPEC "%{fpic|fpie:-k} %{fPIC|fPIE:-k -K}" | |
137 #endif | |
138 | |
139 /* Since we use gas, stdin -> - is a good idea. */ | |
140 #define AS_NEEDS_DASH_FOR_PIPED_INPUT | |
141 | |
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142 #undef LIB_SPEC |
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143 #define LIB_SPEC OBSD_LIB_SPEC |
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144 |
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145 #if defined(HAVE_LD_EH_FRAME_HDR) |
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146 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} " |
0 | 147 #endif |
148 | |
149 #undef LIB_SPEC | |
150 #define LIB_SPEC OBSD_LIB_SPEC | |
151 #endif | |
152 | |
153 | |
154 /* Runtime target specification. */ | |
155 | |
156 /* Miscellaneous parameters. */ | |
157 | |
158 /* Controlling debugging info: dbx options. */ | |
159 | |
160 /* Don't use the `xsTAG;' construct in DBX output; OpenBSD systems that | |
161 use DBX don't support it. */ | |
162 #define DBX_NO_XREFS | |
163 | |
164 | |
165 /* Support of shared libraries, mostly imported from svr4.h through netbsd. */ | |
166 /* Two differences from svr4.h: | |
167 - we use . - _func instead of a local label, | |
168 - we put extra spaces in expressions such as | |
169 .type _func , @function | |
170 This is more readable for a human being and confuses c++filt less. */ | |
171 | |
172 /* Assembler format: output and generation of labels. */ | |
173 | |
174 /* Define the strings used for the .type and .size directives. | |
175 These strings generally do not vary from one system running OpenBSD | |
176 to another, but if a given system needs to use different pseudo-op | |
177 names for these, they may be overridden in the arch specific file. */ | |
178 | |
179 /* OpenBSD assembler is hacked to have .type & .size support even in a.out | |
180 format object files. Functions size are supported but not activated | |
181 yet (look for GRACE_PERIOD_EXPIRED in gas/config/obj-aout.c). | |
182 SET_ASM_OP is needed for attribute alias to work. */ | |
183 | |
184 #undef TYPE_ASM_OP | |
185 #undef SIZE_ASM_OP | |
186 #undef SET_ASM_OP | |
187 #undef GLOBAL_ASM_OP | |
188 | |
189 #define TYPE_ASM_OP "\t.type\t" | |
190 #define SIZE_ASM_OP "\t.size\t" | |
191 #define SET_ASM_OP "\t.set\t" | |
192 #define GLOBAL_ASM_OP "\t.globl\t" | |
193 | |
194 /* The following macro defines the format used to output the second | |
195 operand of the .type assembler directive. */ | |
196 #undef TYPE_OPERAND_FMT | |
197 #define TYPE_OPERAND_FMT "@%s" | |
198 | |
199 /* Provision if extra assembler code is needed to declare a function's result | |
200 (taken from svr4, not needed yet actually). */ | |
201 #ifndef ASM_DECLARE_RESULT | |
202 #define ASM_DECLARE_RESULT(FILE, RESULT) | |
203 #endif | |
204 | |
205 /* These macros generate the special .type and .size directives which | |
206 are used to set the corresponding fields of the linker symbol table | |
207 entries under OpenBSD. These macros also have to output the starting | |
208 labels for the relevant functions/objects. */ | |
209 | |
210 #ifndef OBSD_HAS_DECLARE_FUNCTION_NAME | |
211 /* Extra assembler code needed to declare a function properly. | |
212 Some assemblers may also need to also have something extra said | |
213 about the function's return value. We allow for that here. */ | |
214 #undef ASM_DECLARE_FUNCTION_NAME | |
215 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ | |
216 do { \ | |
217 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ | |
218 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ | |
219 ASM_OUTPUT_LABEL(FILE, NAME); \ | |
220 } while (0) | |
221 #endif | |
222 | |
223 #ifndef OBSD_HAS_DECLARE_FUNCTION_SIZE | |
224 /* Declare the size of a function. */ | |
225 #undef ASM_DECLARE_FUNCTION_SIZE | |
226 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ | |
227 do { \ | |
228 if (!flag_inhibit_size_directive) \ | |
229 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ | |
230 } while (0) | |
231 #endif | |
232 | |
233 #ifndef OBSD_HAS_DECLARE_OBJECT | |
234 /* Extra assembler code needed to declare an object properly. */ | |
235 #undef ASM_DECLARE_OBJECT_NAME | |
236 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ | |
237 do { \ | |
238 HOST_WIDE_INT size; \ | |
239 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ | |
240 size_directive_output = 0; \ | |
241 if (!flag_inhibit_size_directive \ | |
242 && (DECL) && DECL_SIZE (DECL)) \ | |
243 { \ | |
244 size_directive_output = 1; \ | |
245 size = int_size_in_bytes (TREE_TYPE (DECL)); \ | |
246 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \ | |
247 } \ | |
248 ASM_OUTPUT_LABEL (FILE, NAME); \ | |
249 } while (0) | |
250 | |
251 /* Output the size directive for a decl in rest_of_decl_compilation | |
252 in the case where we did not do so before the initializer. | |
253 Once we find the error_mark_node, we know that the value of | |
254 size_directive_output was set by ASM_DECLARE_OBJECT_NAME | |
255 when it was run for the same decl. */ | |
256 #undef ASM_FINISH_DECLARE_OBJECT | |
257 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ | |
258 do { \ | |
259 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ | |
260 HOST_WIDE_INT size; \ | |
261 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ | |
262 && ! AT_END && TOP_LEVEL \ | |
263 && DECL_INITIAL (DECL) == error_mark_node \ | |
264 && !size_directive_output) \ | |
265 { \ | |
266 size_directive_output = 1; \ | |
267 size = int_size_in_bytes (TREE_TYPE (DECL)); \ | |
268 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \ | |
269 } \ | |
270 } while (0) | |
271 #endif | |
272 | |
273 | |
274 /* Those are `generic' ways to weaken/globalize a label. We shouldn't need | |
275 to override a processor specific definition. Hence, #ifndef ASM_* | |
276 In case overriding turns out to be needed, one can always #undef ASM_* | |
277 before including this file. */ | |
278 | |
279 /* Tell the assembler that a symbol is weak. */ | |
280 /* Note: netbsd arm32 assembler needs a .globl here. An override may | |
281 be needed when/if we go for arm32 support. */ | |
282 #ifndef ASM_WEAKEN_LABEL | |
283 #define ASM_WEAKEN_LABEL(FILE,NAME) \ | |
284 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ | |
285 fputc ('\n', FILE); } while (0) | |
286 #endif | |
287 | |
288 /* Storage layout. */ | |
289 | |
290 | |
291 /* bug work around: we don't want to support #pragma weak, but the current | |
292 code layout needs HANDLE_PRAGMA_WEAK asserted for __attribute((weak)) to | |
293 work. On the other hand, we don't define HANDLE_PRAGMA_WEAK directly, | |
294 as this depends on a few other details as well... */ | |
295 #define HANDLE_SYSV_PRAGMA 1 | |
296 | |
297 /* Stack is explicitly denied execution rights on OpenBSD platforms. */ | |
298 #define ENABLE_EXECUTE_STACK \ | |
299 extern void __enable_execute_stack (void *); \ | |
300 void \ | |
301 __enable_execute_stack (void *addr) \ | |
302 { \ | |
303 long size = getpagesize (); \ | |
304 long mask = ~(size-1); \ | |
305 char *page = (char *) (((long) addr) & mask); \ | |
306 char *end = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \ | |
307 \ | |
308 if (mprotect (page, end - page, PROT_READ | PROT_WRITE | PROT_EXEC) < 0) \ | |
309 perror ("mprotect of trampoline code"); \ | |
310 } | |
311 | |
312 #include <sys/types.h> | |
313 #include <sys/mman.h> |