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comparison gcc/config/pa/pa64-hpux.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 77e2b8dfacca
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1 /* Definitions of target machine for GNU compiler, for HPs running
2 HPUX using the 64bit runtime model.
3 Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2007, 2008
4 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
11 any later version.
12
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 /* We can debug dynamically linked executables on hpux11; we also
23 want dereferencing of a NULL pointer to cause a SEGV. Do not move
24 the "+Accept TypeMismatch" switch. We check for it in collect2
25 to determine which init/fini is needed. */
26 #undef LINK_SPEC
27 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
28 #define LINK_SPEC \
29 "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
30 %nWarning: consider linking with `-static' as system libraries with\n\
31 %n profiling support are only provided in archive format}}}\
32 %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
33 %nWarning: consider linking with `-static' as system libraries with\n\
34 %n profiling support are only provided in archive format}}}\
35 %{mhp-ld:+Accept TypeMismatch -z} -E %{mlinker-opt:-O}\
36 %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
37 %{static:-a archive} %{shared:%{mhp-ld:-b}%{!mhp-ld:-shared}}"
38 #else
39 #define LINK_SPEC \
40 "%{!shared:%{p:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
41 %nWarning: consider linking with `-static' as system libraries with\n\
42 %n profiling support are only provided in archive format}}}\
43 %{!shared:%{pg:-L/lib/pa20_64/libp -L/usr/lib/pa20_64/libp %{!static:\
44 %nWarning: consider linking with `-static' as system libraries with\n\
45 %n profiling support are only provided in archive format}}}\
46 %{!mgnu-ld:+Accept TypeMismatch -z} -E %{mlinker-opt:-O}\
47 %{!shared:-u main %{!nostdlib:%{!nodefaultlibs:-u __cxa_finalize}}}\
48 %{static:-a archive} %{shared:%{mgnu-ld:-shared}%{!mgnu-ld:-b}}"
49 #endif
50
51 /* Profiling support is only provided in libc.a. However, libprof and
52 libgprof are only available in shared form on HP-UX 11.00. We use
53 the shared form if we are using the GNU linker or an archive form
54 isn't available. We also usually need to link with libdld and it's
55 only available in shared form. */
56 #undef LIB_SPEC
57 #if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GNU_LD)
58 #define LIB_SPEC \
59 "%{!shared:\
60 %{!p:%{!pg:%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
61 %{static:-a archive}} -lpthread} -lc\
62 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
63 %{p:%{!pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
64 -lprof %{static:-a archive}\
65 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
66 %{static:-a archive}} -lpthread} -lc\
67 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
68 %{pg:%{static:%{!mhp-ld:-a shared}%{mhp-ld:-a archive_shared}}\
69 -lgprof %{static:-a archive}\
70 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
71 %{static:-a archive}} -lpthread} -lc\
72 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
73 %{shared:%{mt|pthread:-lpthread}}"
74 #else
75 #define LIB_SPEC \
76 "%{!shared:\
77 %{!p:%{!pg:%{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
78 %{static:-a archive}} -lpthread} -lc\
79 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
80 %{p:%{!pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
81 -lprof %{static:-a archive}\
82 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
83 %{static:-a archive}} -lpthread} -lc\
84 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
85 %{pg:%{static:%{mgnu-ld:-a shared}%{!mgnu-ld:-a archive_shared}}\
86 -lgprof %{static:-a archive}\
87 %{static|mt|pthread:%{fopenmp:%{static:-a shared} -lrt\
88 %{static:-a archive}} -lpthread} -lc\
89 %{static:%{!nolibdld:-a shared -ldld -a archive -lc}}}}\
90 %{shared:%{mt|pthread:-lpthread}}"
91 #endif
92
93 /* The libgcc_stub.a and milli.a libraries need to come last. */
94 #undef LINK_GCC_C_SEQUENCE_SPEC
95 #define LINK_GCC_C_SEQUENCE_SPEC "\
96 %G %L %G %{!nostdlib:%{!nodefaultlibs:%{!shared:-lgcc_stub}\
97 milli.a%s}}"
98
99 /* Under hpux11, the normal location of the `ld' and `as' programs is the
100 /usr/ccs/bin directory. */
101
102 #ifndef CROSS_DIRECTORY_STRUCTURE
103 #undef MD_EXEC_PREFIX
104 #define MD_EXEC_PREFIX "/usr/ccs/bin"
105 #endif
106
107 /* Default prefixes. */
108
109 #undef STANDARD_STARTFILE_PREFIX_1
110 #define STANDARD_STARTFILE_PREFIX_1 "/lib/pa20_64/"
111
112 #undef STANDARD_STARTFILE_PREFIX_2
113 #define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/pa20_64/"
114
115 /* Under hpux11 the normal location of the various pa20_64 *crt*.o files
116 is the /usr/ccs/lib/pa20_64 directory. Some files may also be in the
117 /opt/langtools/lib/pa20_64 directory. */
118
119 #ifndef CROSS_DIRECTORY_STRUCTURE
120 #undef MD_STARTFILE_PREFIX
121 #define MD_STARTFILE_PREFIX "/usr/ccs/lib/pa20_64/"
122 #endif
123
124 #ifndef CROSS_DIRECTORY_STRUCTURE
125 #undef MD_STARTFILE_PREFIX_1
126 #define MD_STARTFILE_PREFIX_1 "/opt/langtools/lib/pa20_64/"
127 #endif
128
129 /* This macro specifies the biggest alignment supported by the object
130 file format of this machine.
131
132 The .align directive in the HP assembler allows alignments up to
133 4096 bytes. However, the maximum alignment of a global common symbol
134 is 16 bytes using HP ld. Unfortunately, this macro doesn't provide
135 a method to check for common symbols. */
136 #undef MAX_OFILE_ALIGNMENT
137 #define MAX_OFILE_ALIGNMENT 32768
138
139 /* Due to limitations in the target structure, it isn't currently possible
140 to dynamically switch between the GNU and HP assemblers. */
141 #undef TARGET_GAS
142
143 /* Configure selects the standard ELFOS defines for use with GAS. */
144 #ifdef USING_ELFOS_H
145
146 /* We are using GAS. */
147 #define TARGET_GAS 1
148
149 #undef TARGET_ASM_FILE_START
150 #define TARGET_ASM_FILE_START pa_hpux64_gas_file_start
151
152 /* This is how we output a null terminated string. */
153 #undef STRING_ASM_OP
154 #define STRING_ASM_OP "\t.stringz\t"
155
156 #define TEXT_SECTION_ASM_OP "\t.text"
157 #define DATA_SECTION_ASM_OP "\t.data"
158 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
159
160 #define JCR_SECTION_NAME ".jcr"
161
162 #define HP_INIT_ARRAY_SECTION_ASM_OP "\t.section\t.init"
163 #define GNU_INIT_ARRAY_SECTION_ASM_OP "\t.section\t.init_array"
164 #define HP_FINI_ARRAY_SECTION_ASM_OP "\t.section\t.fini"
165 #define GNU_FINI_ARRAY_SECTION_ASM_OP "\t.section\t.fini_array"
166
167 /* We need to override the following two macros defined in elfos.h since
168 the .comm directive has a different syntax and it can't be used for
169 local common symbols. */
170 #undef ASM_OUTPUT_ALIGNED_COMMON
171 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
172 pa_asm_output_aligned_common (FILE, NAME, SIZE, ALIGN)
173
174 #undef ASM_OUTPUT_ALIGNED_LOCAL
175 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
176 pa_asm_output_aligned_local (FILE, NAME, SIZE, ALIGN)
177
178 /* The define in pa.h doesn't work with the alias attribute. The
179 default is ok with the following define for GLOBAL_ASM_OP. */
180 #undef TARGET_ASM_GLOBALIZE_LABEL
181
182 /* This is how we globalize a label. */
183 #define GLOBAL_ASM_OP "\t.globl\t"
184
185 /* Hacked version from defaults.h that uses assemble_name_raw
186 instead of assemble_name. A symbol in a type directive that
187 isn't otherwise referenced doesn't cause the symbol to be
188 placed in the symbol table of the assembled object. */
189 #undef ASM_OUTPUT_TYPE_DIRECTIVE
190 #define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE) \
191 do { \
192 fputs (TYPE_ASM_OP, STREAM); \
193 assemble_name_raw (STREAM, NAME); \
194 fputs (", ", STREAM); \
195 fprintf (STREAM, TYPE_OPERAND_FMT, TYPE); \
196 putc ('\n', STREAM); \
197 } while (0)
198
199 /* Hacked version from elfos.h that doesn't output a label. */
200 #undef ASM_DECLARE_FUNCTION_NAME
201 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
202 do { \
203 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
204 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
205 } while (0)
206
207 /* The type of external references must be set correctly for the
208 dynamic loader to work correctly. This is equivalent to the
209 HP assembler's .IMPORT directive but relates more directly to
210 ELF object file types. */
211 #undef ASM_OUTPUT_EXTERNAL
212 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
213 pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
214 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME) \
215 do { \
216 if (FUNCTION_NAME_P (NAME)) \
217 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
218 else \
219 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
220 default_elf_asm_output_external (FILE, DECL, NAME); \
221 } while (0)
222
223 /* We need set the type for external libcalls. Also note that not all
224 libcall names are passed to targetm.encode_section_info (e.g., __main).
225 Thus, we also have to do the section encoding if it hasn't been done
226 already. */
227 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
228 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
229 do { \
230 if (!FUNCTION_NAME_P (XSTR (FUN, 0))) \
231 hppa_encode_label (FUN); \
232 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function"); \
233 } while (0)
234
235 /* We need to use the HP style for internal labels. */
236 #undef ASM_GENERATE_INTERNAL_LABEL
237 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
238 sprintf (LABEL, "*%c$%s%04ld", (PREFIX)[0], (PREFIX) + 1, (long)(NUM))
239
240 #else /* USING_ELFOS_H */
241
242 /* We are not using GAS. */
243 #define TARGET_GAS 0
244
245 /* HPUX 11 has the "new" HP assembler. It's still lousy, but it's a whole
246 lot better than the assembler shipped with older versions of hpux.
247 However, it doesn't support weak symbols and is a bad fit with ELF. */
248 #undef NEW_HP_ASSEMBLER
249 #define NEW_HP_ASSEMBLER 1
250
251 /* It looks like DWARF2 will be the easiest debug format to handle on this
252 platform. */
253 #define DWARF2_DEBUGGING_INFO 1
254 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
255
256 /* This target uses the ELF object file format. */
257 #define OBJECT_FORMAT_ELF
258
259 #undef TARGET_ASM_FILE_START
260 #define TARGET_ASM_FILE_START pa_hpux64_hpas_file_start
261
262 #undef TEXT_SECTION_ASM_OP
263 #define TEXT_SECTION_ASM_OP "\t.SUBSPA $CODE$\n"
264 #undef READONLY_DATA_SECTION_ASM_OP
265 #define READONLY_DATA_SECTION_ASM_OP "\t.SUBSPA $LIT$\n"
266 #undef DATA_SECTION_ASM_OP
267 #define DATA_SECTION_ASM_OP "\t.SUBSPA $DATA$\n"
268 #undef BSS_SECTION_ASM_OP
269 #define BSS_SECTION_ASM_OP "\t.SUBSPA $BSS$\n"
270
271 /* We provide explicit defines for CTORS_SECTION_ASM_OP and
272 DTORS_SECTION_ASM_OP since we don't yet have support for
273 named sections with the HP assembler. */
274 #undef CTORS_SECTION_ASM_OP
275 #define CTORS_SECTION_ASM_OP "\t.SUBSPA \\.ctors,QUAD=1,ALIGN=8,ACCESS=31"
276 #undef DTORS_SECTION_ASM_OP
277 #define DTORS_SECTION_ASM_OP "\t.SUBSPA \\.dtors,QUAD=1,ALIGN=8,ACCESS=31"
278
279 #define HP_INIT_ARRAY_SECTION_ASM_OP \
280 "\t.SUBSPA \\.init,QUAD=1,ALIGN=8,ACCESS=31"
281 #define GNU_INIT_ARRAY_SECTION_ASM_OP \
282 "\t.SUBSPA \\.init_array,QUAD=1,ALIGN=8,ACCESS=31"
283 #define HP_FINI_ARRAY_SECTION_ASM_OP \
284 "\t.SUBSPA \\.fini,QUAD=1,ALIGN=8,ACCESS=31"
285 #define GNU_FINI_ARRAY_SECTION_ASM_OP \
286 "\t.SUBSPA \\.fini_array,QUAD=1,ALIGN=8,ACCESS=31"
287
288 #endif /* USING_ELFOS_H */
289
290 /* The following defines, used to run constructors and destructors with
291 the SOM linker under HP-UX 11, are not needed. */
292 #undef HAS_INIT_SECTION
293 #undef LD_INIT_SWITCH
294 #undef LD_FINI_SWITCH
295
296 /* The following STARTFILE_SPEC and ENDFILE_SPEC defines provide the
297 magic needed to run initializers and finalizers. */
298 #undef STARTFILE_SPEC
299 #if TARGET_HPUX_11_11
300 #define STARTFILE_SPEC \
301 "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95.o%s} \
302 %{!munix=93:%{!munix=95:unix98%O%s}}} %{static:crtbeginT%O%s} \
303 %{!static:%{!shared:crtbegin%O%s} %{shared:crtbeginS%O%s}}"
304 #else
305 #define STARTFILE_SPEC \
306 "%{!shared: %{!symbolic: crt0%O%s} %{munix=95:unix95%O%s}} \
307 %{static:crtbeginT%O%s} %{!static:%{!shared:crtbegin%O%s} \
308 %{shared:crtbeginS%O%s}}"
309 #endif
310 #undef ENDFILE_SPEC
311 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}"
312
313 /* Since HP uses the .init and .fini sections for array initializers
314 and finalizers, we need different defines for INIT_SECTION_ASM_OP
315 and FINI_SECTION_ASM_OP. With the implementation adopted below,
316 the sections are not actually used. However, we still must provide
317 defines to select the proper code path. */
318 #undef INIT_SECTION_ASM_OP
319 #define INIT_SECTION_ASM_OP
320 #undef FINI_SECTION_ASM_OP
321 #define FINI_SECTION_ASM_OP
322
323 /* We are using array initializers and don't want calls in the INIT
324 and FINI sections. */
325 #undef CRT_CALL_STATIC_FUNCTION
326 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)
327
328 /* The init_priority attribute is not supported with HP ld. This could be
329 supported if collect2 was used with LD_INIT_SWITCH. Unfortunately, this
330 approach doesn't work with GNU ld since HP-UX doesn't support DT_INIT,
331 and therefore the -init and -fini GNU ld switches. */
332 #undef SUPPORTS_INIT_PRIORITY
333 #define SUPPORTS_INIT_PRIORITY (TARGET_GNU_LD ? 1 : 0)
334
335 /* We use DTOR_LIST_BEGIN to carry a bunch of hacks to allow us to use
336 the init and fini array sections with both the HP and GNU linkers.
337 The linkers setup the required dynamic entries in the dynamic segment
338 and the dynamic linker does the calls. This approach avoids using
339 collect2.
340
341 The first hack is to implement __do_global_ctors_aux in crtbegin as
342 it needs to be the first entry in the init array so that it is called
343 last. HP got the order of the init array backwards. The DT_INIT_ARRAY
344 is supposed to be executed in the same order as the addresses appear in
345 the array. DT_FINI_ARRAY is supposed to be executed in the opposite
346 order.
347
348 The second hack is a set of plabels to implement the effect of
349 CRT_CALL_STATIC_FUNCTION. HP-UX 11 only supports DI_INIT_ARRAY and
350 DT_FINI_ARRAY and they put the arrays in .init and .fini, rather than
351 in .init_array and .fini_array. The standard defines for .init and
352 .fini have the execute flag set. So, the assembler has to be hacked
353 to munge the standard flags for these sections to make them agree
354 with what the HP linker expects. With the GNU linker, we need to
355 used the .init_array and .fini_array sections. So, we set up for
356 both just in case. Once we have built the table, the linker does
357 the rest of the work.
358
359 The order is significant. Placing __do_global_ctors_aux first in
360 the list, results in it being called last. User specified initializers,
361 either using the linker +init command or a plabel, run before the
362 initializers specified here. */
363
364 /* We need to add frame_dummy to the initializer list if EH_FRAME_SECTION_NAME
365 or JCR_SECTION_NAME is defined. */
366 #if defined(EH_FRAME_SECTION_NAME) || defined(JCR_SECTION_NAME)
367 #define PA_INIT_FRAME_DUMMY_ASM_OP ".dword P%frame_dummy"
368 #else
369 #define PA_INIT_FRAME_DUMMY_ASM_OP ""
370 #endif
371
372 /* The following hack sets up the .init, .init_array, .fini and
373 .fini_array sections. */
374 #define PA_CRTBEGIN_HACK \
375 asm (TEXT_SECTION_ASM_OP); \
376 static void __attribute__((used)) \
377 __do_global_ctors_aux (void) \
378 { \
379 func_ptr *p = __CTOR_LIST__; \
380 while (*(p + 1)) \
381 p++; \
382 for (; *p != (func_ptr) -1; p--) \
383 (*p) (); \
384 } \
385 \
386 asm (HP_INIT_ARRAY_SECTION_ASM_OP); \
387 asm (".align 8"); \
388 asm (".dword P%__do_global_ctors_aux"); \
389 asm (PA_INIT_FRAME_DUMMY_ASM_OP); \
390 asm (GNU_INIT_ARRAY_SECTION_ASM_OP); \
391 asm (".align 8"); \
392 asm (".dword P%__do_global_ctors_aux"); \
393 asm (PA_INIT_FRAME_DUMMY_ASM_OP); \
394 asm (HP_FINI_ARRAY_SECTION_ASM_OP); \
395 asm (".align 8"); \
396 asm (".dword P%__do_global_dtors_aux"); \
397 asm (GNU_FINI_ARRAY_SECTION_ASM_OP); \
398 asm (".align 8"); \
399 asm (".dword P%__do_global_dtors_aux")
400
401 /* The following two variants of DTOR_LIST_BEGIN are identical to those
402 in crtstuff.c except for the addition of the above crtbegin hack. */
403 #ifdef DTORS_SECTION_ASM_OP
404 #define DTOR_LIST_BEGIN \
405 asm (DTORS_SECTION_ASM_OP); \
406 STATIC func_ptr __DTOR_LIST__[1] \
407 __attribute__ ((aligned(sizeof(func_ptr)))) \
408 = { (func_ptr) (-1) }; \
409 PA_CRTBEGIN_HACK
410 #else
411 #define DTOR_LIST_BEGIN \
412 STATIC func_ptr __DTOR_LIST__[1] \
413 __attribute__ ((section(".dtors"), aligned(sizeof(func_ptr)))) \
414 = { (func_ptr) (-1) }; \
415 PA_CRTBEGIN_HACK
416 #endif
417
418 /* If using HP ld do not call pxdb. Use size as a program that does nothing
419 and returns 0. /bin/true cannot be used because it is a script without
420 an interpreter. */
421 #define INIT_ENVIRONMENT "LD_PXDB=/usr/ccs/bin/size"
422
423 /* The HPUX dynamic linker objects to undefined weak symbols, so do
424 not use them in gthr-posix.h. */
425 #define GTHREAD_USE_WEAK 0
426
427 /* We don't want undefined weak references to __register_frame_info,
428 __deregister_frame_info, _Jv_RegisterClasses and __cxa_finalize
429 introduced by crtbegin.o. The GNU linker only resolves weak
430 references if they appear in a shared library. Thus, it would be
431 impossible to create a static executable if the symbols were weak.
432 So, the best solution seems to be to make the symbols strong and
433 provide an archive library of empty stub functions. */
434 #define TARGET_ATTRIBUTE_WEAK