about summary refs log tree commit diff
path: root/ports/sysdeps/alpha/dl-trampoline.S
blob: 97c122448f00e0d49a97525acc950f74bc0b24ad (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
/* PLT trampolines.  Alpha version.
   Copyright (C) 2005 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, see
   <http://www.gnu.org/licenses/>.  */

#include <sysdep.h>

	.set noat

.macro savei regno, offset
	stq	$\regno, \offset($30)
	cfi_rel_offset(\regno, \offset)
.endm

.macro savef regno, offset
	stt	$f\regno, \offset($30)
	cfi_rel_offset(\regno+32, \offset)
.endm

	.align	4
	.globl	_dl_runtime_resolve_new
	.ent	_dl_runtime_resolve_new

#undef FRAMESIZE
#define FRAMESIZE	14*8

_dl_runtime_resolve_new:
	.frame	$30, FRAMESIZE, $26, 0
	.mask	0x4000000, 0

	ldah	$29, 0($27)		!gpdisp!1
	lda	$30, -FRAMESIZE($30)
	stq	$26, 0*8($30)
	stq	$16, 2*8($30)

	stq	$17, 3*8($30)
	lda	$29, 0($29)		!gpdisp!1
	stq	$18, 4*8($30)
	mov	$28, $16		/* link_map from .got.plt */

	stq	$19, 5*8($30)
	mov	$25, $17		/* offset of reloc entry */
	stq	$20, 6*8($30)
	mov	$26, $18		/* return address */

	stq	$21, 7*8($30)
	stt	$f16, 8*8($30)
	stt	$f17, 9*8($30)
	stt	$f18, 10*8($30)

	stt	$f19, 11*8($30)
	stt	$f20, 12*8($30)
	stt	$f21, 13*8($30)
	.prologue 2

	bsr	$26, _dl_fixup		!samegp
	mov	$0, $27

	ldq	$26, 0*8($30)
	ldq	$16, 2*8($30)
	ldq	$17, 3*8($30)
	ldq	$18, 4*8($30)
	ldq	$19, 5*8($30)
	ldq	$20, 6*8($30)
	ldq	$21, 7*8($30)
	ldt	$f16, 8*8($30)
	ldt	$f17, 9*8($30)
	ldt	$f18, 10*8($30)
	ldt	$f19, 11*8($30)
	ldt	$f20, 12*8($30)
	ldt	$f21, 13*8($30)
	lda	$30, FRAMESIZE($30)
	jmp	$31, ($27), 0
	.end	_dl_runtime_resolve_new

	.globl	_dl_runtime_profile_new
	.type	_dl_runtime_profile_new, @function

#undef FRAMESIZE
#define FRAMESIZE	20*8

	/* We save the registers in a different order than desired by
	   .mask/.fmask, so we have to use explicit cfi directives.  */
	cfi_startproc

_dl_runtime_profile_new:
	ldah	$29, 0($27)		!gpdisp!2
	lda	$30, -FRAMESIZE($30)
	savei	26, 0*8
	stq	$16, 2*8($30)

	stq	$17, 3*8($30)
	lda	$29, 0($29)		!gpdisp!2
	stq	$18, 4*8($30)
	lda	$1, FRAMESIZE($30)	/* incoming sp value */

	stq	$1, 1*8($30)
	stq	$19, 5*8($30)
	stq	$20, 6*8($30)
	mov	$28, $16		/* link_map from .got.plt */

	stq	$21, 7*8($30)
	mov	$25, $17		/* offset of reloc entry */
	stt	$f16, 8*8($30)
	mov	$26, $18		/* return address */

	stt	$f17, 9*8($30)
	mov	$30, $19		/* La_alpha_regs address */
	stt	$f18, 10*8($30)
	lda	$20, 14*8($30)		/* framesize address */

	stt	$f19, 11*8($30)
	stt	$f20, 12*8($30)
	stt	$f21, 13*8($30)
	stq	$28, 16*8($30)
	stq	$25, 17*8($30)

	bsr	$26, _dl_profile_fixup	!samegp
	mov	$0, $27

	/* Discover if we're wrapping this call.  */
	ldq	$18, 14*8($30)
	bge	$18, 1f

	ldq	$26, 0*8($30)
	ldq	$16, 2*8($30)
	ldq	$17, 3*8($30)
	ldq	$18, 4*8($30)
	ldq	$19, 5*8($30)
	ldq	$20, 6*8($30)
	ldq	$21, 7*8($30)
	ldt	$f16, 8*8($30)
	ldt	$f17, 9*8($30)
	ldt	$f18, 10*8($30)
	ldt	$f19, 11*8($30)
	ldt	$f20, 12*8($30)
	ldt	$f21, 13*8($30)
	lda	$30, FRAMESIZE($30)
	jmp	$31, ($27), 0

1:
	/* Create a frame pointer and allocate a new argument frame.  */
	savei	15, 15*8
	mov	$30, $15
	cfi_def_cfa_register (15)
	addq	$18, 15, $18
	bic	$18, 15, $18
	subq	$30, $18, $30

	/* Save the call destination around memcpy.  */
	stq	$0, 14*8($30)

	/* Copy the stack arguments into place.  */
	lda	$16, 0($30)
	lda	$17, FRAMESIZE($15)
	jsr	$26, memcpy
	ldgp	$29, 0($26)

	/* Reload the argument registers.  */
	ldq	$27, 14*8($30)
	ldq	$16, 2*8($15)
	ldq	$17, 3*8($15)
	ldq	$18, 4*8($15)
	ldq	$19, 5*8($15)
	ldq	$20, 6*8($15)
	ldq	$21, 7*8($15)
	ldt	$f16, 8*8($15)
	ldt	$f17, 9*8($15)
	ldt	$f18, 10*8($15)
	ldt	$f19, 11*8($15)
	ldt	$f20, 12*8($15)
	ldt	$f21, 13*8($15)

	jsr	$26, ($27), 0
	ldgp	$29, 0($26)

	/* Set up for call to _dl_call_pltexit.  */
	ldq	$16, 16*8($15)
	ldq	$17, 17*8($15)
	stq	$0, 16*8($15)
	lda	$18, 0($15)
	stq	$1, 17*8($15)
	lda	$19, 16*8($15)
	stt	$f0, 18*8($15)
	stt	$f1, 19*8($15)
	bsr	$26, _dl_call_pltexit	!samegp

	mov	$15, $30
	cfi_def_cfa_register (30)
	ldq	$26, 0($30)
	ldq	$15, 15*8($30)
	lda	$30, FRAMESIZE($30)
	ret

	cfi_endproc
	.size	_dl_runtime_profile_new, .-_dl_runtime_profile_new

	.align	4
	.globl	_dl_runtime_resolve_old
	.ent	_dl_runtime_resolve_old

#undef FRAMESIZE
#define FRAMESIZE	44*8

_dl_runtime_resolve_old:
	lda	$30, -FRAMESIZE($30)
	.frame	$30, FRAMESIZE, $26
	/* Preserve all registers that C normally doesn't.  */
	stq	$26, 0*8($30)
	stq	$0, 1*8($30)
	stq	$1, 2*8($30)
	stq	$2, 3*8($30)
	stq	$3, 4*8($30)
	stq	$4, 5*8($30)
	stq	$5, 6*8($30)
	stq	$6, 7*8($30)
	stq	$7, 8*8($30)
	stq	$8, 9*8($30)
	stq	$16, 10*8($30)
	stq	$17, 11*8($30)
	stq	$18, 12*8($30)
	stq	$19, 13*8($30)
	stq	$20, 14*8($30)
	stq	$21, 15*8($30)
	stq	$22, 16*8($30)
	stq	$23, 17*8($30)
	stq	$24, 18*8($30)
	stq	$25, 19*8($30)
	stq	$29, 20*8($30)
	stt	$f0, 21*8($30)
	stt	$f1, 22*8($30)
	stt	$f10, 23*8($30)
	stt	$f11, 24*8($30)
	stt	$f12, 25*8($30)
	stt	$f13, 26*8($30)
	stt	$f14, 27*8($30)
	stt	$f15, 28*8($30)
	stt	$f16, 29*8($30)
	stt	$f17, 30*8($30)
	stt	$f18, 31*8($30)
	stt	$f19, 32*8($30)
	stt	$f20, 33*8($30)
	stt	$f21, 34*8($30)
	stt	$f22, 35*8($30)
	stt	$f23, 36*8($30)
	stt	$f24, 37*8($30)
	stt	$f25, 38*8($30)
	stt	$f26, 39*8($30)
	stt	$f27, 40*8($30)
	stt	$f28, 41*8($30)
	stt	$f29, 42*8($30)
	stt	$f30, 43*8($30)
	.mask	0x27ff01ff, -FRAMESIZE
	.fmask	0xfffffc03, -FRAMESIZE+21*8
	/* Set up our GP.  */
	br	$29, .+4
	ldgp	$29, 0($29)
	.prologue 0
	/* Set up the arguments for _dl_fixup:
	   $16 = link_map out of plt0
	   $17 = offset of reloc entry = ($28 - $27 - 20) /12 * 24
	   $18 = return address
	*/
	subq	$28, $27, $17
	ldq	$16, 8($27)
	subq	$17, 20, $17
	mov	$26, $18
	addq	$17, $17, $17
	bsr	$26, _dl_fixup	!samegp

	/* Move the destination address into position.  */
	mov	$0, $27
	/* Restore program registers.  */
	ldq	$26, 0*8($30)
	ldq	$0, 1*8($30)
	ldq	$1, 2*8($30)
	ldq	$2, 3*8($30)
	ldq	$3, 4*8($30)
	ldq	$4, 5*8($30)
	ldq	$5, 6*8($30)
	ldq	$6, 7*8($30)
	ldq	$7, 8*8($30)
	ldq	$8, 9*8($30)
	ldq	$16, 10*8($30)
	ldq	$17, 11*8($30)
	ldq	$18, 12*8($30)
	ldq	$19, 13*8($30)
	ldq	$20, 14*8($30)
	ldq	$21, 15*8($30)
	ldq	$22, 16*8($30)
	ldq	$23, 17*8($30)
	ldq	$24, 18*8($30)
	ldq	$25, 19*8($30)
	ldq	$29, 20*8($30)
	ldt	$f0, 21*8($30)
	ldt	$f1, 22*8($30)
	ldt	$f10, 23*8($30)
	ldt	$f11, 24*8($30)
	ldt	$f12, 25*8($30)
	ldt	$f13, 26*8($30)
	ldt	$f14, 27*8($30)
	ldt	$f15, 28*8($30)
	ldt	$f16, 29*8($30)
	ldt	$f17, 30*8($30)
	ldt	$f18, 31*8($30)
	ldt	$f19, 32*8($30)
	ldt	$f20, 33*8($30)
	ldt	$f21, 34*8($30)
	ldt	$f22, 35*8($30)
	ldt	$f23, 36*8($30)
	ldt	$f24, 37*8($30)
	ldt	$f25, 38*8($30)
	ldt	$f26, 39*8($30)
	ldt	$f27, 40*8($30)
	ldt	$f28, 41*8($30)
	ldt	$f29, 42*8($30)
	ldt	$f30, 43*8($30)
	/* Flush the Icache after having modified the .plt code.  */
	imb
	/* Clean up and turn control to the destination */
	lda	$30, FRAMESIZE($30)
	jmp	$31, ($27)

	.end	_dl_runtime_resolve_old

	.globl	_dl_runtime_profile_old
	.usepv	_dl_runtime_profile_old, no
	.type	_dl_runtime_profile_old, @function

	/* We save the registers in a different order than desired by
	   .mask/.fmask, so we have to use explicit cfi directives.  */
	cfi_startproc

#undef FRAMESIZE
#define FRAMESIZE	50*8

	.align	4
_dl_runtime_profile_old:
	lda	$30, -FRAMESIZE($30)
	cfi_adjust_cfa_offset (FRAMESIZE)

	/* Preserve all argument registers.  This also constructs the
	   La_alpha_regs structure.  */
	savei	26, 0*8
	savei	16, 2*8
	savei	17, 3*8
	savei	18, 4*8
	savei	19, 5*8
	savei	20, 6*8
	savei	21, 7*8
	lda	$16, FRAMESIZE($30)
	savef	16, 8*8
	savef	17, 9*8
	savef	18, 10*8
	savef	19, 11*8
	savef	20, 12*8
	savef	21, 13*8
	stq	$16, 1*8($30)

	/* Preserve all registers that C normally doesn't.  */
	savei	0, 14*8
	savei	1, 15*8
	savei	2, 16*8
	savei	3, 17*8
	savei	4, 18*8
	savei	5, 19*8
	savei	6, 20*8
	savei	7, 21*8
	savei	8, 22*8
	savei	22, 23*8
	savei	23, 24*8
	savei	24, 25*8
	savei	25, 26*8
	savei	29, 27*8
	savef	0, 28*8
	savef	1, 29*8
	savef	10, 30*8
	savef	11, 31*8
	savef	12, 32*8
	savef	13, 33*8
	savef	14, 34*8
	savef	15, 35*8
	savef	22, 36*8
	savef	23, 37*8
	savef	24, 38*8
	savef	25, 39*8
	savef	26, 40*8
	savef	27, 41*8
	savef	28, 42*8
	savef	29, 43*8
	savef	30, 44*8

	/* Set up our GP.  */
	br	$29, .+4
	ldgp	$29, 0($29)

	/* Set up the arguments for _dl_profile_fixup:
	   $16 = link_map out of plt0
	   $17 = offset of reloc entry = ($28 - $27 - 20) /12 * 24
	   $18 = return address
	   $19 = La_alpha_regs address
	   $20 = framesize address
	*/
	subq	$28, $27, $17
	ldq	$16, 8($27)
	subq	$17, 20, $17
	mov	$26, $18
	addq	$17, $17, $17
	lda	$19, 0($30)
	lda	$20, 45*8($30)
	stq	$16, 48*8($30)
	stq	$17, 49*8($30)

	bsr	$26, _dl_profile_fixup	!samegp

	/* Discover if we're wrapping this call.  */
	ldq	$18, 45*8($30)
	bge	$18, 1f

	/* Move the destination address into position.  */
	mov	$0, $27
	/* Restore program registers.  */
	ldq	$26, 0*8($30)
	ldq	$16, 2*8($30)
	ldq	$17, 3*8($30)
	ldq	$18, 4*8($30)
	ldq	$19, 5*8($30)
	ldq	$20, 6*8($30)
	ldq	$21, 7*8($30)
	ldt	$f16, 8*8($30)
	ldt	$f17, 9*8($30)
	ldt	$f18, 10*8($30)
	ldt	$f19, 11*8($30)
	ldt	$f20, 12*8($30)
	ldt	$f21, 13*8($30)
	ldq	$0, 14*8($30)
	ldq	$1, 15*8($30)
	ldq	$2, 16*8($30)
	ldq	$3, 17*8($30)
	ldq	$4, 18*8($30)
	ldq	$5, 19*8($30)
	ldq	$6, 20*8($30)
	ldq	$7, 21*8($30)
	ldq	$8, 22*8($30)
	ldq	$22, 23*8($30)
	ldq	$23, 24*8($30)
	ldq	$24, 25*8($30)
	ldq	$25, 26*8($30)
	ldq	$29, 27*8($30)
	ldt	$f0, 28*8($30)
	ldt	$f1, 29*8($30)
	ldt	$f10, 30*8($30)
	ldt	$f11, 31*8($30)
	ldt	$f12, 32*8($30)
	ldt	$f13, 33*8($30)
	ldt	$f14, 34*8($30)
	ldt	$f15, 35*8($30)
	ldt	$f22, 36*8($30)
	ldt	$f23, 37*8($30)
	ldt	$f24, 38*8($30)
	ldt	$f25, 39*8($30)
	ldt	$f26, 40*8($30)
	ldt	$f27, 41*8($30)
	ldt	$f28, 42*8($30)
	ldt	$f29, 43*8($30)
	ldt	$f30, 44*8($30)

	/* Clean up and turn control to the destination.  */
	lda	$30, FRAMESIZE($30)
	jmp	$31, ($27)

1:
	/* Create a frame pointer and allocate a new argument frame.  */
	savei	15, 45*8
	mov	$30, $15
	cfi_def_cfa_register (15)
	addq	$18, 15, $18
	bic	$18, 15, $18
	subq	$30, $18, $30

	/* Save the call destination around memcpy.  */
	stq	$0, 46*8($30)

	/* Copy the stack arguments into place.  */
	lda	$16, 0($30)
	lda	$17, FRAMESIZE($15)
	jsr	$26, memcpy
	ldgp	$29, 0($26)

	/* Reload the argument registers.  */
	ldq	$27, 46*8($30)
	ldq	$16, 2*8($15)
	ldq	$17, 3*8($15)
	ldq	$18, 4*8($15)
	ldq	$19, 5*8($15)
	ldq	$20, 6*8($15)
	ldq	$21, 7*8($15)
	ldt	$f16, 8*8($15)
	ldt	$f17, 9*8($15)
	ldt	$f18, 10*8($15)
	ldt	$f19, 11*8($15)
	ldt	$f20, 12*8($15)
	ldt	$f21, 13*8($15)

	jsr	$26, ($27), 0
	ldgp	$29, 0($26)

	/* Set up for call to _dl_call_pltexit.  */
	ldq	$16, 48*8($15)
	ldq	$17, 49*8($15)
	stq	$0, 46*8($15)
	lda	$18, 0($15)
	stq	$1, 47*8($15)
	lda	$19, 46*8($15)
	stt	$f0, 48*8($15)
	stt	$f1, 49*8($15)
	bsr	$26, _dl_call_pltexit	!samegp

	mov	$15, $30
	cfi_def_cfa_register (30)
	ldq	$26, 0($30)
	ldq	$15, 45*8($30)
	lda	$30, FRAMESIZE($30)
	ret

	cfi_endproc
	.size	_dl_runtime_profile_old, .-_dl_runtime_profile_old