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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgcc/] [crtstuff.c] - Blame information for rev 847

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1 734 jeremybenn
/* Specialized bits of code needed to support construction and
2
   destruction of file-scope objects in C++ code.
3
   Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
4
   2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2011
5
   Free Software Foundation, Inc.
6
   Contributed by Ron Guilmette (rfg@monkeys.com).
7
 
8
This file is part of GCC.
9
 
10
GCC is free software; you can redistribute it and/or modify it under
11
the terms of the GNU General Public License as published by the Free
12
Software Foundation; either version 3, or (at your option) any later
13
version.
14
 
15
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16
WARRANTY; without even the implied warranty of MERCHANTABILITY or
17
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
18
for more details.
19
 
20
Under Section 7 of GPL version 3, you are granted additional
21
permissions described in the GCC Runtime Library Exception, version
22
3.1, as published by the Free Software Foundation.
23
 
24
You should have received a copy of the GNU General Public License and
25
a copy of the GCC Runtime Library Exception along with this program;
26
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
27
<http://www.gnu.org/licenses/>.  */
28
 
29
/* This file is a bit like libgcc2.c in that it is compiled
30
   multiple times and yields multiple .o files.
31
 
32
   This file is useful on target machines where the object file format
33
   supports multiple "user-defined" sections (e.g. COFF, ELF, ROSE).  On
34
   such systems, this file allows us to avoid running collect (or any
35
   other such slow and painful kludge).  Additionally, if the target
36
   system supports a .init section, this file allows us to support the
37
   linking of C++ code with a non-C++ main program.
38
 
39
   Note that if INIT_SECTION_ASM_OP is defined in the tm.h file, then
40
   this file *will* make use of the .init section.  If that symbol is
41
   not defined however, then the .init section will not be used.
42
 
43
   Currently, only ELF and COFF are supported.  It is likely however that
44
   ROSE could also be supported, if someone was willing to do the work to
45
   make whatever (small?) adaptations are needed.  (Some work may be
46
   needed on the ROSE assembler and linker also.)
47
 
48
   This file must be compiled with gcc.  */
49
 
50
/* Target machine header files require this define. */
51
#define IN_LIBGCC2
52
 
53
/* FIXME: Including auto-host is incorrect, but until we have
54
   identified the set of defines that need to go into auto-target.h,
55
   this will have to do.  */
56
#include "auto-host.h"
57
#undef pid_t
58
#undef rlim_t
59
#undef ssize_t
60
#undef vfork
61
#include "tconfig.h"
62
#include "tsystem.h"
63
#include "coretypes.h"
64
#include "tm.h"
65
#include "libgcc_tm.h"
66
#include "unwind-dw2-fde.h"
67
 
68
#ifndef FORCE_CODE_SECTION_ALIGN
69
# define FORCE_CODE_SECTION_ALIGN
70
#endif
71
 
72
#ifndef CRT_CALL_STATIC_FUNCTION
73
# define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)     \
74
static void __attribute__((__used__))                   \
75
call_ ## FUNC (void)                                    \
76
{                                                       \
77
  asm (SECTION_OP);                                     \
78
  FUNC ();                                              \
79
  FORCE_CODE_SECTION_ALIGN                              \
80
  asm (TEXT_SECTION_ASM_OP);                            \
81
}
82
#endif
83
 
84
#if defined(OBJECT_FORMAT_ELF) \
85
    && !defined(OBJECT_FORMAT_FLAT) \
86
    && defined(HAVE_LD_EH_FRAME_HDR) \
87
    && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
88
    && defined(__FreeBSD__) && __FreeBSD__ >= 7
89
#include <link.h>
90
# define USE_PT_GNU_EH_FRAME
91
#endif
92
 
93
#if defined(OBJECT_FORMAT_ELF) \
94
    && !defined(OBJECT_FORMAT_FLAT) \
95
    && defined(HAVE_LD_EH_FRAME_HDR) && defined(TARGET_DL_ITERATE_PHDR) \
96
    && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
97
    && defined(__sun__) && defined(__svr4__)
98
#include <link.h>
99
# define USE_PT_GNU_EH_FRAME
100
#endif
101
 
102
#if defined(OBJECT_FORMAT_ELF) \
103
    && !defined(OBJECT_FORMAT_FLAT) \
104
    && defined(HAVE_LD_EH_FRAME_HDR) \
105
    && !defined(inhibit_libc) && !defined(CRTSTUFFT_O) \
106
    && defined(__GLIBC__) && __GLIBC__ >= 2
107
#include <link.h>
108
/* uClibc pretends to be glibc 2.2 and DT_CONFIG is defined in its link.h.
109
   But it doesn't use PT_GNU_EH_FRAME ELF segment currently.  */
110
# if !defined(__UCLIBC__) \
111
     && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
112
     || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
113
#  define USE_PT_GNU_EH_FRAME
114
# endif
115
#endif
116
#if defined(EH_FRAME_SECTION_NAME) && !defined(USE_PT_GNU_EH_FRAME)
117
# define USE_EH_FRAME_REGISTRY
118
#endif
119
#if defined(EH_FRAME_SECTION_NAME) && EH_TABLES_CAN_BE_READ_ONLY
120
# define EH_FRAME_SECTION_CONST const
121
#else
122
# define EH_FRAME_SECTION_CONST
123
#endif
124
 
125
#if !defined(DTOR_LIST_END) && defined(OBJECT_FORMAT_ELF) \
126
    && defined(HAVE_GAS_HIDDEN) && !defined(FINI_ARRAY_SECTION_ASM_OP)
127
# define HIDDEN_DTOR_LIST_END
128
#endif
129
 
130
#if !defined(USE_TM_CLONE_REGISTRY) && defined(OBJECT_FORMAT_ELF)
131
# define USE_TM_CLONE_REGISTRY 1
132
#endif
133
 
134
/* We do not want to add the weak attribute to the declarations of these
135
   routines in unwind-dw2-fde.h because that will cause the definition of
136
   these symbols to be weak as well.
137
 
138
   This exposes a core issue, how to handle creating weak references vs
139
   how to create weak definitions.  Either we have to have the definition
140
   of TARGET_WEAK_ATTRIBUTE be conditional in the shared header files or
141
   have a second declaration if we want a function's references to be weak,
142
   but not its definition.
143
 
144
   Making TARGET_WEAK_ATTRIBUTE conditional seems like a good solution until
145
   one thinks about scaling to larger problems -- i.e., the condition under
146
   which TARGET_WEAK_ATTRIBUTE is active will eventually get far too
147
   complicated.
148
 
149
   So, we take an approach similar to #pragma weak -- we have a second
150
   declaration for functions that we want to have weak references.
151
 
152
   Neither way is particularly good.  */
153
 
154
/* References to __register_frame_info and __deregister_frame_info should
155
   be weak in this file if at all possible.  */
156
extern void __register_frame_info (const void *, struct object *)
157
                                  TARGET_ATTRIBUTE_WEAK;
158
extern void __register_frame_info_bases (const void *, struct object *,
159
                                         void *, void *)
160
                                  TARGET_ATTRIBUTE_WEAK;
161
extern void *__deregister_frame_info (const void *)
162
                                     TARGET_ATTRIBUTE_WEAK;
163
extern void *__deregister_frame_info_bases (const void *)
164
                                     TARGET_ATTRIBUTE_WEAK;
165
extern void __do_global_ctors_1 (void);
166
 
167
/* Likewise for _Jv_RegisterClasses.  */
168
extern void _Jv_RegisterClasses (void *) TARGET_ATTRIBUTE_WEAK;
169
 
170
/* Likewise for transactional memory clone tables.  */
171
extern void _ITM_registerTMCloneTable (void *, size_t) TARGET_ATTRIBUTE_WEAK;
172
extern void _ITM_deregisterTMCloneTable (void *) TARGET_ATTRIBUTE_WEAK;
173
 
174
#ifdef OBJECT_FORMAT_ELF
175
 
176
/*  Declare a pointer to void function type.  */
177
typedef void (*func_ptr) (void);
178
#define STATIC static
179
 
180
#else  /* OBJECT_FORMAT_ELF */
181
 
182
#include "gbl-ctors.h"
183
 
184
#define STATIC
185
 
186
#endif /* OBJECT_FORMAT_ELF */
187
 
188
#ifdef CRT_BEGIN
189
 
190
/* NOTE:  In order to be able to support SVR4 shared libraries, we arrange
191
   to have one set of symbols { __CTOR_LIST__, __DTOR_LIST__, __CTOR_END__,
192
   __DTOR_END__ } per root executable and also one set of these symbols
193
   per shared library.  So in any given whole process image, we may have
194
   multiple definitions of each of these symbols.  In order to prevent
195
   these definitions from conflicting with one another, and in order to
196
   ensure that the proper lists are used for the initialization/finalization
197
   of each individual shared library (respectively), we give these symbols
198
   only internal (i.e. `static') linkage, and we also make it a point to
199
   refer to only the __CTOR_END__ symbol in crtend.o and the __DTOR_LIST__
200
   symbol in crtbegin.o, where they are defined.  */
201
 
202
/* No need for .ctors/.dtors section if linker can place them in
203
   .init_array/.fini_array section.  */
204
#ifndef USE_INITFINI_ARRAY
205
/* The -1 is a flag to __do_global_[cd]tors indicating that this table
206
   does not start with a count of elements.  */
207
#ifdef CTOR_LIST_BEGIN
208
CTOR_LIST_BEGIN;
209
#elif defined(CTORS_SECTION_ASM_OP)
210
/* Hack: force cc1 to switch to .data section early, so that assembling
211
   __CTOR_LIST__ does not undo our behind-the-back change to .ctors.  */
212
static func_ptr force_to_data[1] __attribute__ ((__used__)) = { };
213
asm (CTORS_SECTION_ASM_OP);
214
STATIC func_ptr __CTOR_LIST__[1]
215
  __attribute__ ((__used__, aligned(sizeof(func_ptr))))
216
  = { (func_ptr) (-1) };
217
#else
218
STATIC func_ptr __CTOR_LIST__[1]
219
  __attribute__ ((__used__, section(".ctors"), aligned(sizeof(func_ptr))))
220
  = { (func_ptr) (-1) };
221
#endif /* __CTOR_LIST__ alternatives */
222
 
223
#ifdef DTOR_LIST_BEGIN
224
DTOR_LIST_BEGIN;
225
#elif defined(DTORS_SECTION_ASM_OP)
226
asm (DTORS_SECTION_ASM_OP);
227
STATIC func_ptr __DTOR_LIST__[1]
228
  __attribute__ ((aligned(sizeof(func_ptr))))
229
  = { (func_ptr) (-1) };
230
#else
231
STATIC func_ptr __DTOR_LIST__[1]
232
  __attribute__((section(".dtors"), aligned(sizeof(func_ptr))))
233
  = { (func_ptr) (-1) };
234
#endif /* __DTOR_LIST__ alternatives */
235
#endif /* USE_INITFINI_ARRAY */
236
 
237
#ifdef USE_EH_FRAME_REGISTRY
238
/* Stick a label at the beginning of the frame unwind info so we can register
239
   and deregister it with the exception handling library code.  */
240
STATIC EH_FRAME_SECTION_CONST char __EH_FRAME_BEGIN__[]
241
     __attribute__((section(EH_FRAME_SECTION_NAME), aligned(4)))
242
     = { };
243
#endif /* USE_EH_FRAME_REGISTRY */
244
 
245
#ifdef JCR_SECTION_NAME
246
/* Stick a label at the beginning of the java class registration info
247
   so we can register them properly.  */
248
STATIC void *__JCR_LIST__[]
249
  __attribute__ ((used, section(JCR_SECTION_NAME), aligned(sizeof(void*))))
250
  = { };
251
#endif /* JCR_SECTION_NAME */
252
 
253
#if USE_TM_CLONE_REGISTRY
254
STATIC func_ptr __TMC_LIST__[]
255
  __attribute__((used, section(".tm_clone_table"), aligned(sizeof(void*))))
256
  = { };
257
# ifdef HAVE_GAS_HIDDEN
258
extern func_ptr __TMC_END__[] __attribute__((__visibility__ ("hidden")));
259
# endif
260
 
261
static inline void
262
deregister_tm_clones (void)
263
{
264
  void (*fn) (void *);
265
 
266
#ifdef HAVE_GAS_HIDDEN
267
  if (__TMC_END__ - __TMC_LIST__ == 0)
268
    return;
269
#else
270
  if (__TMC_LIST__[0] == NULL)
271
    return;
272
#endif
273
 
274
  fn = _ITM_deregisterTMCloneTable;
275
  __asm ("" : "+r" (fn));
276
  if (fn)
277
    fn (__TMC_LIST__);
278
}
279
 
280
static inline void
281
register_tm_clones (void)
282
{
283
  void (*fn) (void *, size_t);
284
  size_t size;
285
 
286
#ifdef HAVE_GAS_HIDDEN
287
  size = (__TMC_END__ - __TMC_LIST__) / 2;
288
#else
289
  for (size = 0; __TMC_LIST__[size * 2] != NULL; size++)
290
    continue;
291
#endif
292
  if (size == 0)
293
    return;
294
 
295
  fn = _ITM_registerTMCloneTable;
296
  __asm ("" : "+r" (fn));
297
  if (fn)
298
    fn (__TMC_LIST__, size);
299
}
300
#endif /* USE_TM_CLONE_REGISTRY */
301
 
302
#if defined(INIT_SECTION_ASM_OP) || defined(INIT_ARRAY_SECTION_ASM_OP)
303
 
304
#ifdef OBJECT_FORMAT_ELF
305
 
306
/* Declare the __dso_handle variable.  It should have a unique value
307
   in every shared-object; in a main program its value is zero.  The
308
   object should in any case be protected.  This means the instance
309
   in one DSO or the main program is not used in another object.  The
310
   dynamic linker takes care of this.  */
311
 
312
#ifdef TARGET_LIBGCC_SDATA_SECTION
313
extern void *__dso_handle __attribute__ ((__section__ (TARGET_LIBGCC_SDATA_SECTION)));
314
#endif
315
#ifdef HAVE_GAS_HIDDEN
316
extern void *__dso_handle __attribute__ ((__visibility__ ("hidden")));
317
#endif
318
#ifdef CRTSTUFFS_O
319
void *__dso_handle = &__dso_handle;
320
#else
321
void *__dso_handle = 0;
322
#endif
323
 
324
/* The __cxa_finalize function may not be available so we use only a
325
   weak declaration.  */
326
extern void __cxa_finalize (void *) TARGET_ATTRIBUTE_WEAK;
327
 
328
/* Run all the global destructors on exit from the program.  */
329
 
330
/* Some systems place the number of pointers in the first word of the
331
   table.  On SVR4 however, that word is -1.  In all cases, the table is
332
   null-terminated.  On SVR4, we start from the beginning of the list and
333
   invoke each per-compilation-unit destructor routine in order
334
   until we find that null.
335
 
336
   Note that this function MUST be static.  There will be one of these
337
   functions in each root executable and one in each shared library, but
338
   although they all have the same code, each one is unique in that it
339
   refers to one particular associated `__DTOR_LIST__' which belongs to the
340
   same particular root executable or shared library file.
341
 
342
   On some systems, this routine is run more than once from the .fini,
343
   when exit is called recursively, so we arrange to remember where in
344
   the list we left off processing, and we resume at that point,
345
   should we be re-invoked.  */
346
 
347
static void __attribute__((used))
348
__do_global_dtors_aux (void)
349
{
350
  static _Bool completed;
351
 
352
  if (__builtin_expect (completed, 0))
353
    return;
354
 
355
#ifdef CRTSTUFFS_O
356
  if (__cxa_finalize)
357
    __cxa_finalize (__dso_handle);
358
#endif
359
 
360
#ifdef FINI_ARRAY_SECTION_ASM_OP
361
  /* If we are using .fini_array then destructors will be run via that
362
     mechanism.  */
363
#elif defined(HIDDEN_DTOR_LIST_END)
364
  {
365
    /* Safer version that makes sure only .dtors function pointers are
366
       called even if the static variable is maliciously changed.  */
367
    extern func_ptr __DTOR_END__[] __attribute__((visibility ("hidden")));
368
    static size_t dtor_idx;
369
    const size_t max_idx = __DTOR_END__ - __DTOR_LIST__ - 1;
370
    func_ptr f;
371
 
372
    while (dtor_idx < max_idx)
373
      {
374
        f = __DTOR_LIST__[++dtor_idx];
375
        f ();
376
      }
377
  }
378
#else /* !defined (FINI_ARRAY_SECTION_ASM_OP) */
379
  {
380
    static func_ptr *p = __DTOR_LIST__ + 1;
381
    func_ptr f;
382
 
383
    while ((f = *p))
384
      {
385
        p++;
386
        f ();
387
      }
388
  }
389
#endif /* !defined(FINI_ARRAY_SECTION_ASM_OP) */
390
 
391
#if USE_TM_CLONE_REGISTRY
392
  deregister_tm_clones ();
393
#endif /* USE_TM_CLONE_REGISTRY */
394
 
395
#ifdef USE_EH_FRAME_REGISTRY
396
#ifdef CRT_GET_RFIB_DATA
397
  /* If we used the new __register_frame_info_bases interface,
398
     make sure that we deregister from the same place.  */
399
  if (__deregister_frame_info_bases)
400
    __deregister_frame_info_bases (__EH_FRAME_BEGIN__);
401
#else
402
  if (__deregister_frame_info)
403
    __deregister_frame_info (__EH_FRAME_BEGIN__);
404
#endif
405
#endif
406
 
407
  completed = 1;
408
}
409
 
410
/* Stick a call to __do_global_dtors_aux into the .fini section.  */
411
#ifdef FINI_SECTION_ASM_OP
412
CRT_CALL_STATIC_FUNCTION (FINI_SECTION_ASM_OP, __do_global_dtors_aux)
413
#elif defined (FINI_ARRAY_SECTION_ASM_OP)
414
static func_ptr __do_global_dtors_aux_fini_array_entry[]
415
  __attribute__ ((__used__, section(".fini_array"), aligned(sizeof(func_ptr))))
416
  = { __do_global_dtors_aux };
417
#else /* !FINI_SECTION_ASM_OP && !FINI_ARRAY_SECTION_ASM_OP */
418
static void __attribute__((used))
419
__do_global_dtors_aux_1 (void)
420
{
421
  atexit (__do_global_dtors_aux);
422
}
423
CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_dtors_aux_1)
424
#endif
425
 
426
#if defined(USE_EH_FRAME_REGISTRY) \
427
    || defined(JCR_SECTION_NAME) \
428
    || defined(USE_TM_CLONE_REGISTRY)
429
/* Stick a call to __register_frame_info into the .init section.  For some
430
   reason calls with no arguments work more reliably in .init, so stick the
431
   call in another function.  */
432
 
433
static void __attribute__((used))
434
frame_dummy (void)
435
{
436
#ifdef USE_EH_FRAME_REGISTRY
437
  static struct object object;
438
#ifdef CRT_GET_RFIB_DATA
439
  void *tbase, *dbase;
440
  tbase = 0;
441
  CRT_GET_RFIB_DATA (dbase);
442
  if (__register_frame_info_bases)
443
    __register_frame_info_bases (__EH_FRAME_BEGIN__, &object, tbase, dbase);
444
#else
445
  if (__register_frame_info)
446
    __register_frame_info (__EH_FRAME_BEGIN__, &object);
447
#endif /* CRT_GET_RFIB_DATA */
448
#endif /* USE_EH_FRAME_REGISTRY */
449
 
450
#ifdef JCR_SECTION_NAME
451
  if (__JCR_LIST__[0])
452
    {
453
      void (*register_classes) (void *) = _Jv_RegisterClasses;
454
      __asm ("" : "+r" (register_classes));
455
      if (register_classes)
456
        register_classes (__JCR_LIST__);
457
    }
458
#endif /* JCR_SECTION_NAME */
459
 
460
#if USE_TM_CLONE_REGISTRY
461
  register_tm_clones ();
462
#endif /* USE_TM_CLONE_REGISTRY */
463
}
464
 
465
#ifdef INIT_SECTION_ASM_OP
466
CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, frame_dummy)
467
#else /* defined(INIT_SECTION_ASM_OP) */
468
static func_ptr __frame_dummy_init_array_entry[]
469
  __attribute__ ((__used__, section(".init_array"), aligned(sizeof(func_ptr))))
470
  = { frame_dummy };
471
#endif /* !defined(INIT_SECTION_ASM_OP) */
472
#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME || USE_TM_CLONE_REGISTRY */
473
 
474
#else  /* OBJECT_FORMAT_ELF */
475
 
476
/* The function __do_global_ctors_aux is compiled twice (once in crtbegin.o
477
   and once in crtend.o).  It must be declared static to avoid a link
478
   error.  Here, we define __do_global_ctors as an externally callable
479
   function.  It is externally callable so that __main can invoke it when
480
   INVOKE__main is defined.  This has the additional effect of forcing cc1
481
   to switch to the .text section.  */
482
 
483
static void __do_global_ctors_aux (void);
484
void
485
__do_global_ctors (void)
486
{
487
#ifdef INVOKE__main
488
  /* If __main won't actually call __do_global_ctors then it doesn't matter
489
     what's inside the function.  The inside of __do_global_ctors_aux is
490
     called automatically in that case.  And the Alliant fx2800 linker
491
     crashes on this reference.  So prevent the crash.  */
492
  __do_global_ctors_aux ();
493
#endif
494
}
495
 
496
asm (INIT_SECTION_ASM_OP);      /* cc1 doesn't know that we are switching! */
497
 
498
/* A routine to invoke all of the global constructors upon entry to the
499
   program.  We put this into the .init section (for systems that have
500
   such a thing) so that we can properly perform the construction of
501
   file-scope static-storage C++ objects within shared libraries.  */
502
 
503
static void __attribute__((used))
504
__do_global_ctors_aux (void)    /* prologue goes in .init section */
505
{
506
  FORCE_CODE_SECTION_ALIGN      /* explicit align before switch to .text */
507
  asm (TEXT_SECTION_ASM_OP);    /* don't put epilogue and body in .init */
508
  DO_GLOBAL_CTORS_BODY;
509
  atexit (__do_global_dtors);
510
}
511
 
512
#endif /* OBJECT_FORMAT_ELF */
513
 
514
#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
515
 
516
extern void __do_global_dtors (void);
517
 
518
/* This case is used by the Irix 6 port, which supports named sections but
519
   not an SVR4-style .fini section.  __do_global_dtors can be non-static
520
   in this case because we protect it with -hidden_symbol.  */
521
 
522
void
523
__do_global_dtors (void)
524
{
525
  func_ptr *p, f;
526
  for (p = __DTOR_LIST__ + 1; (f = *p); p++)
527
    f ();
528
 
529
#if USE_TM_CLONE_REGISTRY
530
  deregister_tm_clones ();
531
#endif /* USE_TM_CLONE_REGISTRY */
532
 
533
#ifdef USE_EH_FRAME_REGISTRY
534
  if (__deregister_frame_info)
535
    __deregister_frame_info (__EH_FRAME_BEGIN__);
536
#endif
537
}
538
 
539
#if defined(USE_EH_FRAME_REGISTRY) \
540
    || defined(JCR_SECTION_NAME) \
541
    || defined(USE_TM_CLONE_REGISTRY)
542
/* A helper function for __do_global_ctors, which is in crtend.o.  Here
543
   in crtbegin.o, we can reference a couple of symbols not visible there.
544
   Plus, since we're before libgcc.a, we have no problems referencing
545
   functions from there.  */
546
void
547
__do_global_ctors_1(void)
548
{
549
#ifdef USE_EH_FRAME_REGISTRY
550
  static struct object object;
551
  if (__register_frame_info)
552
    __register_frame_info (__EH_FRAME_BEGIN__, &object);
553
#endif
554
 
555
#ifdef JCR_SECTION_NAME
556
  if (__JCR_LIST__[0])
557
    {
558
      void (*register_classes) (void *) = _Jv_RegisterClasses;
559
      __asm ("" : "+r" (register_classes));
560
      if (register_classes)
561
        register_classes (__JCR_LIST__);
562
    }
563
#endif
564
 
565
#if USE_TM_CLONE_REGISTRY
566
  register_tm_clones ();
567
#endif /* USE_TM_CLONE_REGISTRY */
568
}
569
#endif /* USE_EH_FRAME_REGISTRY || JCR_SECTION_NAME || USE_TM_CLONE_REGISTRY */
570
 
571
#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
572
#error "What are you doing with crtstuff.c, then?"
573
#endif
574
 
575
#elif defined(CRT_END) /* ! CRT_BEGIN */
576
 
577
/* No need for .ctors/.dtors section if linker can place them in
578
   .init_array/.fini_array section.  */
579
#ifndef USE_INITFINI_ARRAY
580
/* Put a word containing zero at the end of each of our two lists of function
581
   addresses.  Note that the words defined here go into the .ctors and .dtors
582
   sections of the crtend.o file, and since that file is always linked in
583
   last, these words naturally end up at the very ends of the two lists
584
   contained in these two sections.  */
585
 
586
#ifdef CTOR_LIST_END
587
CTOR_LIST_END;
588
#elif defined(CTORS_SECTION_ASM_OP)
589
/* Hack: force cc1 to switch to .data section early, so that assembling
590
   __CTOR_LIST__ does not undo our behind-the-back change to .ctors.  */
591
static func_ptr force_to_data[1] __attribute__ ((__used__)) = { };
592
asm (CTORS_SECTION_ASM_OP);
593
STATIC func_ptr __CTOR_END__[1]
594
  __attribute__((aligned(sizeof(func_ptr))))
595
  = { (func_ptr) 0 };
596
#else
597
STATIC func_ptr __CTOR_END__[1]
598
  __attribute__((section(".ctors"), aligned(sizeof(func_ptr))))
599
  = { (func_ptr) 0 };
600
#endif
601
 
602
#ifdef DTOR_LIST_END
603
DTOR_LIST_END;
604
#elif defined(HIDDEN_DTOR_LIST_END)
605
#ifdef DTORS_SECTION_ASM_OP
606
asm (DTORS_SECTION_ASM_OP);
607
#endif
608
func_ptr __DTOR_END__[1]
609
  __attribute__ ((used,
610
#ifndef DTORS_SECTION_ASM_OP
611
                  section(".dtors"),
612
#endif
613
                  aligned(sizeof(func_ptr)), visibility ("hidden")))
614
  = { (func_ptr) 0 };
615
#elif defined(DTORS_SECTION_ASM_OP)
616
asm (DTORS_SECTION_ASM_OP);
617
STATIC func_ptr __DTOR_END__[1]
618
  __attribute__ ((used, aligned(sizeof(func_ptr))))
619
  = { (func_ptr) 0 };
620
#else
621
STATIC func_ptr __DTOR_END__[1]
622
  __attribute__((used, section(".dtors"), aligned(sizeof(func_ptr))))
623
  = { (func_ptr) 0 };
624
#endif
625
#endif /* USE_INITFINI_ARRAY */
626
 
627
#ifdef EH_FRAME_SECTION_NAME
628
/* Terminate the frame unwind info section with a 4byte 0 as a sentinel;
629
   this would be the 'length' field in a real FDE.  */
630
# if __INT_MAX__ == 2147483647
631
typedef int int32;
632
# elif __LONG_MAX__ == 2147483647
633
typedef long int32;
634
# elif __SHRT_MAX__ == 2147483647
635
typedef short int32;
636
# else
637
#  error "Missing a 4 byte integer"
638
# endif
639
STATIC EH_FRAME_SECTION_CONST int32 __FRAME_END__[]
640
     __attribute__ ((used, section(EH_FRAME_SECTION_NAME),
641
                     aligned(sizeof(int32))))
642
     = { 0 };
643
#endif /* EH_FRAME_SECTION_NAME */
644
 
645
#ifdef JCR_SECTION_NAME
646
/* Null terminate the .jcr section array.  */
647
STATIC void *__JCR_END__[1]
648
   __attribute__ ((used, section(JCR_SECTION_NAME),
649
                   aligned(sizeof(void *))))
650
   = { 0 };
651
#endif /* JCR_SECTION_NAME */
652
 
653
#if USE_TM_CLONE_REGISTRY
654
# ifndef HAVE_GAS_HIDDEN
655
static
656
# endif
657
func_ptr __TMC_END__[]
658
  __attribute__((used, section(".tm_clone_table"), aligned(sizeof(void *))))
659
# ifdef HAVE_GAS_HIDDEN
660
  __attribute__((__visibility__ ("hidden"))) = { };
661
# else
662
  = { 0, 0 };
663
# endif
664
#endif /* USE_TM_CLONE_REGISTRY */
665
 
666
#ifdef INIT_ARRAY_SECTION_ASM_OP
667
 
668
/* If we are using .init_array, there is nothing to do.  */
669
 
670
#elif defined(INIT_SECTION_ASM_OP)
671
 
672
#ifdef OBJECT_FORMAT_ELF
673
static void __attribute__((used))
674
__do_global_ctors_aux (void)
675
{
676
  func_ptr *p;
677
  for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
678
    (*p) ();
679
}
680
 
681
/* Stick a call to __do_global_ctors_aux into the .init section.  */
682
CRT_CALL_STATIC_FUNCTION (INIT_SECTION_ASM_OP, __do_global_ctors_aux)
683
#else  /* OBJECT_FORMAT_ELF */
684
 
685
/* Stick the real initialization code, followed by a normal sort of
686
   function epilogue at the very end of the .init section for this
687
   entire root executable file or for this entire shared library file.
688
 
689
   Note that we use some tricks here to get *just* the body and just
690
   a function epilogue (but no function prologue) into the .init
691
   section of the crtend.o file.  Specifically, we switch to the .text
692
   section, start to define a function, and then we switch to the .init
693
   section just before the body code.
694
 
695
   Earlier on, we put the corresponding function prologue into the .init
696
   section of the crtbegin.o file (which will be linked in first).
697
 
698
   Note that we want to invoke all constructors for C++ file-scope static-
699
   storage objects AFTER any other possible initialization actions which
700
   may be performed by the code in the .init section contributions made by
701
   other libraries, etc.  That's because those other initializations may
702
   include setup operations for very primitive things (e.g. initializing
703
   the state of the floating-point coprocessor, etc.) which should be done
704
   before we start to execute any of the user's code.  */
705
 
706
static void
707
__do_global_ctors_aux (void)    /* prologue goes in .text section */
708
{
709
  asm (INIT_SECTION_ASM_OP);
710
  DO_GLOBAL_CTORS_BODY;
711
  atexit (__do_global_dtors);
712
}                               /* epilogue and body go in .init section */
713
 
714
FORCE_CODE_SECTION_ALIGN
715
asm (TEXT_SECTION_ASM_OP);
716
 
717
#endif /* OBJECT_FORMAT_ELF */
718
 
719
#elif defined(HAS_INIT_SECTION) /* ! INIT_SECTION_ASM_OP */
720
 
721
extern void __do_global_ctors (void);
722
 
723
/* This case is used by the Irix 6 port, which supports named sections but
724
   not an SVR4-style .init section.  __do_global_ctors can be non-static
725
   in this case because we protect it with -hidden_symbol.  */
726
void
727
__do_global_ctors (void)
728
{
729
  func_ptr *p;
730
#if defined(USE_EH_FRAME_REGISTRY) \
731
    || defined(JCR_SECTION_NAME) \
732
    || defined(USE_TM_CLONE_REGISTRY)
733
  __do_global_ctors_1();
734
#endif
735
  for (p = __CTOR_END__ - 1; *p != (func_ptr) -1; p--)
736
    (*p) ();
737
}
738
 
739
#else /* ! INIT_SECTION_ASM_OP && ! HAS_INIT_SECTION */
740
#error "What are you doing with crtstuff.c, then?"
741
#endif
742
 
743
#else /* ! CRT_BEGIN && ! CRT_END */
744
#error "One of CRT_BEGIN or CRT_END must be defined."
745
#endif

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