summary refs log tree commit diff
path: root/sysdeps/ia64/dl-machine.h
blob: 04381fe60d9029ec2f273ee2297cb46139456934 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
/* Machine-dependent ELF dynamic relocation inline functions.  IA-64 version.
   Copyright (C) 1995,1996,1997,2000,2001,2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef dl_machine_h
#define dl_machine_h 1

#define ELF_MACHINE_NAME "ia64"

#include <assert.h>
#include <string.h>
#include <link.h>
#include <errno.h>


/* Translate a processor specific dynamic tag to the index
   in l_info array.  */
#define DT_IA_64(x) (DT_IA_64_##x - DT_LOPROC + DT_NUM)

/* There are currently 123 dynamic symbols in ld.so.
   IA64_BOOT_FPTR_TABLE_LEN needs to be at least that big.  */
#define IA64_BOOT_FPTR_TABLE_LEN	200

/* An FDESC is a function descriptor.  */

struct ia64_fdesc
  {
    Elf64_Addr ip;	/* code entry point */
    Elf64_Addr gp;	/* global pointer */
  };

struct ia64_fdesc_table
  {
    struct ia64_fdesc_table *next;
    unsigned int len;			/* # of entries in fdesc table */
    volatile unsigned int first_unused;	/* index of first available entry */
    struct ia64_fdesc fdesc[0];
  };

extern Elf64_Addr __ia64_make_fptr (struct link_map *, const Elf64_Sym *,
				    Elf64_Addr);

static inline void
__ia64_init_bootstrap_fdesc_table (struct link_map *map)
{
  Elf64_Addr *boot_table;

  /* careful: this will be called before got has been relocated... */
  asm ("addl %0 = @gprel (__ia64_boot_fptr_table), gp" : "=r"(boot_table));

  map->l_mach.fptr_table_len = IA64_BOOT_FPTR_TABLE_LEN;
  map->l_mach.fptr_table = boot_table;
}

#define ELF_MACHINE_BEFORE_RTLD_RELOC(dynamic_info)		\
	__ia64_init_bootstrap_fdesc_table (&bootstrap_map);

/* Return nonzero iff ELF header is compatible with the running host.  */
static inline int
elf_machine_matches_host (const Elf64_Ehdr *ehdr)
{
  return ehdr->e_machine == EM_IA_64;
}


/* Return the link-time address of _DYNAMIC.  */
static inline Elf64_Addr
elf_machine_dynamic (void)
{
  Elf64_Addr *p;

  __asm__ (
	".section .sdata\n"
	"	.type __dynamic_ltv#, @object\n"
	"	.size __dynamic_ltv#, 8\n"
	"__dynamic_ltv:\n"
	"	data8	@ltv(_DYNAMIC#)\n"
	".previous\n"
	"	addl	%0 = @gprel(__dynamic_ltv#), gp ;;"
	: "=r" (p));

  return *p;
}


/* Return the run-time load address of the shared object.  */
static inline Elf64_Addr
elf_machine_load_address (void)
{
  Elf64_Addr ip;
  int *p;

  __asm__ (
	"1:	mov %0 = ip\n"
	".section .sdata\n"
	"2:	data4	@ltv(1b)\n"
	"       .align 8\n"
	".previous\n"
	"	addl	%1 = @gprel(2b), gp ;;"
	: "=r" (ip), "=r" (p));

  return ip - (Elf64_Addr) *p;
}

/* Set up the loaded object described by L so its unrelocated PLT
   entries will jump to the on-demand fixup code in dl-runtime.c.  */

static inline int
elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
{
  extern void _dl_runtime_resolve (void);
  extern void _dl_runtime_profile (void);

  if (lazy)
    {
      register Elf64_Addr gp __asm__ ("gp");
      Elf64_Addr *reserve, doit;

      /*
       * Careful with the typecast here or it will try to add l-l_addr
       * pointer elements
       */
      reserve = ((Elf64_Addr *)
		 (l->l_info[DT_IA_64 (PLT_RESERVE)]->d_un.d_ptr + l->l_addr));
      /* Identify this shared object.  */
      reserve[0] = (Elf64_Addr) l;

      /* This function will be called to perform the relocation.  */
      if (!profile)
	doit = (Elf64_Addr) ((struct ia64_fdesc *) &_dl_runtime_resolve)->ip;
      else
	{
	  if (_dl_name_match_p (GL(dl_profile), l))
	    {
	      /* This is the object we are looking for.  Say that we really
		 want profiling and the timers are started.  */
	      GL(dl_profile_map) = l;
	    }
	  doit = (Elf64_Addr) ((struct ia64_fdesc *) &_dl_runtime_profile)->ip;
	}

      reserve[1] = doit;
      reserve[2] = gp;
    }

  return lazy;
}


/*
   This code is used in dl-runtime.c to call the `fixup' function
   and then redirect to the address it returns. `fixup()' takes two
   arguments, however profile_fixup() takes three.

   The ABI specifies that we will never see more than 8 input
   registers to a function call, thus it is safe to simply allocate
   those, and simpler than playing stack games.
					                     - 12/09/99 Jes
 */
#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name)			     \
  extern void tramp_name (void);					     \
  asm (									     \
"	.global " #tramp_name "#\n"					     \
"	.proc " #tramp_name "#\n"					     \
#tramp_name ":\n"							     \
"	{ .mmi\n"							     \
"	  alloc loc0 = ar.pfs, 8, 6, 3, 0\n"				     \
"	  adds r2 = -144, r12\n"					     \
"	  adds r3 = -128, r12\n"					     \
"	}\n"								     \
"	{ .mii\n"							     \
"	  adds r12 = -160, r12\n"					     \
"	  mov loc1 = b0\n"						     \
"	  mov out2 = b0		/* needed by fixup_profile */\n"	     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mfb\n"							     \
"	  mov loc2 = r8		/* preserve struct value register */\n"	     \
"	  nop.f 0\n"							     \
"	  nop.b 0\n"							     \
"	}\n"								     \
"	{ .mii\n"							     \
"	  mov loc3 = r9		/* preserve language specific register */\n" \
"	  mov loc4 = r10	/* preserve language specific register */\n" \
"	  mov loc5 = r11	/* preserve language specific register */\n" \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  stf.spill [r2] = f8, 32\n"					     \
"	  stf.spill [r3] = f9, 32\n"					     \
"	  mov out0 = r16\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  stf.spill [r2] = f10, 32\n"					     \
"	  stf.spill [r3] = f11, 32\n"					     \
"	  shl out1 = r15, 4\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  stf.spill [r2] = f12, 32\n"					     \
"	  stf.spill [r3] = f13, 32\n"					     \
"	  shladd out1 = r15, 3, out1\n"					     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmb\n"							     \
"	  stf.spill [r2] = f14\n"					     \
"	  stf.spill [r3] = f15\n"					     \
"	  br.call.sptk.many b0 = " #fixup_name "#\n"			     \
"	}\n"								     \
"	{ .mii\n"							     \
"	  ld8 r9 = [ret0], 8\n"						     \
"	  adds r2 = 16, r12\n"						     \
"	  adds r3 = 32, r12\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  ldf.fill f8 = [r2], 32\n"					     \
"	  ldf.fill f9 = [r3], 32\n"					     \
"	  mov b0 = loc1\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  ldf.fill f10 = [r2], 32\n"					     \
"	  ldf.fill f11 = [r3], 32\n"					     \
"	  mov b6 = r9\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  ldf.fill f12 = [r2], 32\n"					     \
"	  ldf.fill f13 = [r3], 32\n"					     \
"	  mov ar.pfs = loc0\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mmi\n"							     \
"	  ldf.fill f14 = [r2], 32\n"					     \
"	  ldf.fill f15 = [r3], 32\n"					     \
"	  adds r12 = 160, r12\n"					     \
"	  ;;\n"								     \
"	}\n"								     \
"	{ .mii\n"							     \
"	  mov r9 = loc3		/* restore language specific register */\n"  \
"	  mov r10 = loc4	/* restore language specific register */\n"  \
"	  mov r11 = loc5	/* restore language specific register */\n"  \
"	}\n"								     \
"	{ .mii\n"							     \
"	  ld8 gp = [ret0]\n"						     \
"	  mov r8 = loc2		/* restore struct value register */\n"	     \
"	  ;;\n"								     \
"	}\n"								     \
"	/* An alloc is needed for the break system call to work.\n"	     \
"	   We don't care about the old value of the pfs register.  */\n"     \
"	{ .mmb\n"							     \
"	  alloc r2 = ar.pfs, 0, 0, 8, 0\n"				     \
"	  br.sptk.many b6\n"						     \
"	  ;;\n"								     \
"	}\n"								     \
"	.endp " #tramp_name "#\n");

#ifndef PROF
#define ELF_MACHINE_RUNTIME_TRAMPOLINE 				\
  TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup);		\
  TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup);
#else
#define ELF_MACHINE_RUNTIME_TRAMPOLINE				\
  TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup);		\
  strong_alias (_dl_runtime_resolve, _dl_runtime_profile);
#endif


/* Initial entry point code for the dynamic linker.
   The C function `_dl_start' is the real entry point;
   its return value is the user program's entry point.  */

#define RTLD_START asm (						      \
".text\n"								      \
"	.global _start#\n"						      \
"	.proc _start#\n"						      \
"_start:\n"								      \
"0:	{ .mii\n"							      \
"	  alloc loc0 = ar.pfs, 0, 3, 4, 0\n"				      \
"	  mov r2 = ip\n"						      \
"	  addl r3 = @gprel(0b), r0\n"					      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mlx\n"							      \
"	  /* Calculate the GP, and save a copy in loc1.  */\n"		      \
"	  sub gp = r2, r3\n"						      \
"	  movl r8 = 0x9804c0270033f\n"					      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mii\n"							      \
"	  mov ar.fpsr = r8\n"						      \
"	  sub loc1 = r2, r3\n"						      \
"	  /* _dl_start wants a pointer to the pointer to the arg block and\n" \
"	     the arg block starts with an integer, thus the magic 16. */\n"   \
"	  adds out0 = 16, sp\n"						      \
"	}\n"								      \
"	{ .bbb\n"							      \
"	  br.call.sptk.many b0 = _dl_start#\n"				      \
"	  ;;\n"								      \
"	}\n"								      \
"	.endp _start#\n"						      \
"	/* FALLTHRU */\n"						      \
"	.global _dl_start_user#\n"					      \
"	.proc _dl_start_user#\n"					      \
"_dl_start_user:\n"							      \
"	{ .mii\n"							      \
"	  /* Save the pointer to the user entry point fptr in loc2.  */\n"    \
"	  mov loc2 = ret0\n"						      \
"	  /* Store the highest stack address.  */\n"			      \
"	  addl r2 = @ltoff(__libc_stack_end#), gp\n"			      \
"	  addl r3 = @gprel(_dl_skip_args), gp\n"			      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mmi\n"							      \
"	  ld8 r2 = [r2]\n"						      \
"	  ld4 r3 = [r3]\n"						      \
"	  adds r11 = 24, sp	/* Load the address of argv. */\n"	      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mii\n"							      \
"	  st8 [r2] = sp\n"						      \
"	  adds r10 = 16, sp	/* Load the address of argc. */\n"	      \
"	  mov out2 = r11\n"						      \
"	  ;;\n"								      \
"	  /* See if we were run as a command with the executable file\n"      \
"	     name as an extra leading argument.  If so, adjust the argv\n"    \
"	     pointer to skip _dl_skip_args words.\n"			      \
"	     Note that _dl_skip_args is an integer, not a long - Jes\n"	      \
"\n"									      \
"	     The stack pointer has to be 16 byte aligned. We cannot simply\n" \
"	     addjust the stack pointer. We have to move the whole argv and\n" \
"	     envp and adjust _dl_argv by _dl_skip_args.  H.J.  */\n"	      \
"	}\n"								      \
"	{ .mib\n"							      \
"	  ld8 out1 = [r10]	/* is argc actually stored as a long\n"	      \
"				   or as an int? */\n"			      \
"	  addl r2 = @ltoff(_dl_argv), gp\n"				      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mmi\n"							      \
"	  ld8 r2 = [r2]		/* Get the address of _dl_argv. */\n"	      \
"	  sub out1 = out1, r3	/* Get the new argc. */\n"		      \
"	  shladd r3 = r3, 3, r0\n"					      \
"	  ;;\n"								      \
"	}\n"								      \
"	{\n"								      \
"	  .mib\n"							      \
"	  ld8 r17 = [r2]	/* Get _dl_argv. */\n"			      \
"	  add r15 = r11, r3	/* The address of the argv we move */\n"      \
"	  ;;\n"								      \
"	}\n"								      \
"	/* ??? Could probably merge these two loops into 3 bundles.\n"	      \
"	   using predication to control which set of copies we're on.  */\n"  \
"1:	/* Copy argv. */\n"						      \
"	{ .mfi\n"							      \
"	  ld8 r16 = [r15], 8	/* Load the value in the old argv. */\n"      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mib\n"							      \
"	  st8 [r11] = r16, 8	/* Store it in the new argv. */\n"	      \
"	  cmp.ne p6, p7 = 0, r16\n"					      \
"(p6)	  br.cond.dptk.few 1b\n"					      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mmi\n"							      \
"	  mov out3 = r11\n"						      \
"	  sub r17 = r17, r3	/* Substract _dl_skip_args. */\n"	      \
"	  addl out0 = @ltoff(_rtld_global), gp\n"			      \
"	}\n"								      \
"1:	/* Copy env. */\n"						      \
"	{ .mfi\n"							      \
"	  ld8 r16 = [r15], 8	/* Load the value in the old env. */\n"	      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mib\n"							      \
"	  st8 [r11] = r16, 8	/* Store it in the new env. */\n"	      \
"	  cmp.ne p6, p7 = 0, r16\n"					      \
"(p6)	  br.cond.dptk.few 1b\n"					      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mmb\n"							      \
"	  st8 [r10] = out1		/* Record the new argc. */\n"	      \
"	  ld8 out0 = [out0]\n"						      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mmb\n"							      \
"	  ld8 out0 = [out0]		/* get the linkmap */\n"	      \
"	  st8 [r2] = r17		/* Load the new _dl_argv. */\n"	      \
"	  br.call.sptk.many b0 = _dl_init#\n"				      \
"	  ;;\n"								      \
"	}\n"								      \
"	/* Pass our finializer function to the user,\n"			      \
"	   and jump to the user's entry point.  */\n"			      \
"	{ .mmi\n"							      \
"	  ld8 r3 = [loc2], 8\n"						      \
"	  mov b0 = r0\n"						      \
"	}\n"								      \
"	{ .mmi\n"							      \
"	  addl ret0 = @ltoff(@fptr(_dl_fini#)), gp\n"			      \
"	  ;;\n"								      \
"	  mov b6 = r3\n"						      \
"	}\n"								      \
"	{ .mmi\n"							      \
"	  ld8 ret0 = [ret0]\n"						      \
"	  ld8 gp = [loc2]\n"						      \
"	  mov ar.pfs = loc0\n"						      \
"	  ;;\n"								      \
"	}\n"								      \
"	{ .mfb\n"							      \
"	  br.sptk.many b6\n"						      \
"	  ;;\n"								      \
"	}\n"								      \
"	.endp _dl_start_user#\n"					      \
".previous\n");


#ifndef RTLD_START_SPECIAL_INIT
#define RTLD_START_SPECIAL_INIT /* nothing */
#endif

/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
   PLT entries should not be allowed to define the value.
   ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
   of the main executable's symbols, as for a COPY reloc, which we don't
   use.  */
/* ??? Ignore IPLTMSB for now.  */
#define elf_machine_type_class(type) \
  (((type) == R_IA64_IPLTLSB) * ELF_RTYPE_CLASS_PLT)

/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
#define ELF_MACHINE_JMP_SLOT	 R_IA64_IPLTLSB

/* According to the IA-64 specific documentation, Rela is always used.  */
#define ELF_MACHINE_NO_REL 1

/* Return the address of the entry point. */
#define ELF_MACHINE_START_ADDRESS(map, start)	\
  DL_STATIC_FUNCTION_ADDRESS (map, start)

#define elf_machine_profile_fixup_plt(l, reloc, rel_addr, value) \
  elf_machine_fixup_plt (l, reloc, rel_addr, value)

#define elf_machine_profile_plt(reloc_addr) ((Elf64_Addr) (reloc_addr))

/* Fixup a PLT entry to bounce directly to the function at VALUE.  */
static inline Elf64_Addr
elf_machine_fixup_plt (struct link_map *l, lookup_t t,
		       const Elf64_Rela *reloc,
		       Elf64_Addr *reloc_addr, Elf64_Addr value)
{
  /* l is the link_map for the caller, t is the link_map for the object
   * being called */
  /* got has already been relocated in elf_get_dynamic_info() */
  reloc_addr[1] = t->l_info[DT_PLTGOT]->d_un.d_ptr;
  /* we need a "release" here to ensure that the gp is visible before
     the code entry point is updated: */
  ((volatile Elf64_Addr *) reloc_addr)[0] = value;
  return (Elf64_Addr) reloc_addr;
}

/* Return the final value of a plt relocation.  */
static inline Elf64_Addr
elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
		       Elf64_Addr value)
{
  /* No need to handle rel vs rela since IA64 is rela only */
  return value + reloc->r_addend;
}

#endif /* !dl_machine_h */

#ifdef RESOLVE_MAP

#define R_IA64_TYPE(R)	 ((R) & -8)
#define R_IA64_FORMAT(R) ((R) & 7)

#define R_IA64_FORMAT_32MSB	4
#define R_IA64_FORMAT_32LSB	5
#define R_IA64_FORMAT_64MSB	6
#define R_IA64_FORMAT_64LSB	7


/* Perform the relocation specified by RELOC and SYM (which is fully
   resolved).  MAP is the object containing the reloc.  */
static inline void
elf_machine_rela (struct link_map *map,
		  const Elf64_Rela *reloc,
		  const Elf64_Sym *sym,
		  const struct r_found_version *version,
		  Elf64_Addr *const reloc_addr)
{
  const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);
  Elf64_Addr value;

#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC && !defined SHARED
  /* This is defined in rtld.c, but nowhere in the static libc.a; make the
     reference weak so static programs can still link.  This declaration
     cannot be done when compiling rtld.c (i.e.  #ifdef RTLD_BOOTSTRAP)
     because rtld.c contains the common defn for _dl_rtld_map, which is
     incompatible with a weak decl in the same file.  */
  weak_extern (_dl_rtld_map);
#endif

  /* We cannot use a switch here because we cannot locate the switch
     jump table until we've self-relocated.  */

#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
  if (__builtin_expect (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_REL64LSB),
			0))
    {
      assert (ELF64_R_TYPE (reloc->r_info) == R_IA64_REL64LSB);
      value = *reloc_addr;
# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
      /* Already done in dynamic linker.  */
      if (map != &GL(dl_rtld_map))
# endif
        value += map->l_addr;
    }
# ifndef RTLD_BOOTSTRAP
  else if (r_type == R_IA64_NONE)
    return;
# endif
  else
#endif
    {
      struct link_map *sym_map;

      /* RESOLVE_MAP() will return NULL if it fail to locate the symbol.  */
      if ((sym_map = RESOLVE_MAP (&sym, version, r_type)))
        {
	  value = sym ? sym_map->l_addr + sym->st_value : 0;
	  value += reloc->r_addend;

	  if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DIR64LSB))
	    ;/* No adjustment.  */
	  else if (r_type == R_IA64_IPLTLSB)
	    {
	      elf_machine_fixup_plt (NULL, sym_map, reloc, reloc_addr, value);
	      return;
	    }
	  else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_FPTR64LSB))
	    value = __ia64_make_fptr (sym_map, sym, value);
	  else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_PCREL64LSB))
	    value -= (Elf64_Addr) reloc_addr & -16;
	  else
	    assert (! "unexpected dynamic reloc type");
	}
      else
	value = 0;
    }

  /* ??? Ignore MSB and Instruction format for now.  */
  if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_64LSB)
    *reloc_addr = value;
  else if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_32LSB)
    *(int *) reloc_addr = value;
  else if (r_type == R_IA64_IPLTLSB)
    {
      reloc_addr[0] = 0;
      reloc_addr[1] = 0;
    }
  else
    assert (! "unexpected dynamic reloc format");
}

static inline void
elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
			   Elf64_Addr *const reloc_addr)
{
  /* ??? Ignore MSB and Instruction format for now.  */
  assert (ELF64_R_TYPE (reloc->r_info) == R_IA64_REL64LSB);

  *reloc_addr += l_addr;
}

/* Perform a RELATIVE reloc on the .got entry that transfers to the .plt.  */
static inline void
elf_machine_lazy_rel (struct link_map *map,
		      Elf64_Addr l_addr, const Elf64_Rela *reloc)
{
  Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset);
  const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info);

  if (r_type == R_IA64_IPLTLSB)
    {
      reloc_addr[0] += l_addr;
      reloc_addr[1] += l_addr;
    }
  else if (r_type == R_IA64_NONE)
    return;
  else
    assert (! "unexpected PLT reloc type");
}

#endif /* RESOLVE_MAP */