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
|
;*********************************************************************
;* *
;* Objective Caml *
;* *
;* Xavier Leroy, projet Cristal, INRIA Rocquencourt *
;* *
;* Copyright 1996 Institut National de Recherche en Informatique et *
;* en Automatique. All rights reserved. This file is distributed *
;* under the terms of the GNU Library General Public License, with *
;* the special exception on linking described in file ../LICENSE. *
;* *
;*********************************************************************
; $Id$
; Asm part of the runtime system for the HP PA-RISC processor.
; Must be preprocessed by cpp
#ifdef SYS_hpux
#define G(x) x
#define CODESPACE .code
#define CODE_ALIGN 4
#define EXPORT_CODE(x) .export x, entry, priv_lev=3
#define EXPORT_DATA(x) .export x, data
#define STARTPROC .proc ! .callinfo frame=0, no_calls ! .entry
#define ENDPROC .exit ! .procend
#define LOADHIGH(x) addil LR%x-$global$, %r27
#define LOW(x) RR%x-$global$
#define LOADHIGHLABEL(x) ldil LR%x, %r1
#define LOWLABEL(x) RR%x
#endif
#if defined(SYS_linux) || defined(SYS_gnu)
#define G(x) x
#define CODESPACE .text
#define CODE_ALIGN 8
#define EXPORT_CODE(x) .globl x
#define EXPORT_DATA(x) .globl x
#define STARTPROC
#define ENDPROC
#define LOADHIGH(x) addil LR%x-$global$, %r27
#define LOW(x) RR%x-$global$
#define LOADHIGHLABEL(x) ldil LR%x, %r1
#define LOWLABEL(x) RR%x
#endif
#ifdef SYS_hpux
.space $PRIVATE$
.subspa $DATA$,quad=1,align=8,access=31
.subspa $BSS$,quad=1,align=8,access=31,zero,sort=82
.space $TEXT$
.subspa $LIT$,quad=0,align=8,access=44
.subspa $CODE$,quad=0,align=8,access=44,code_only
.import $global$, data
.import $$dyncall, millicode
.import caml_garbage_collection, code
.import caml_program, code
.import caml_raise, code
.import caml_apply2, code
.import caml_apply3, code
.import caml_array_bound_error, code
caml_young_limit .comm 8
caml_young_ptr .comm 8
caml_bottom_of_stack .comm 8
caml_last_return_address .comm 8
caml_gc_regs .comm 8
caml_exception_pointer .comm 8
caml_required_size .comm 8
#endif
#if defined(SYS_linux) || defined(SYS_gnu)
.align 8
.comm G(young_limit), 4
.comm G(young_ptr), 4
.comm G(caml_bottom_of_stack), 4
.comm G(caml_last_return_address), 4
.comm G(caml_gc_regs), 4
.comm G(caml_exception_pointer), 4
.comm G(caml_required_size), 4
#endif
; Allocation functions
CODESPACE
.align CODE_ALIGN
EXPORT_CODE(G(caml_allocN))
G(caml_allocN):
STARTPROC
; Required size in %r29
ldw 0(%r4), %r1
sub %r3, %r29, %r3
comb,<<,n %r3, %r1, G(caml_call_gc) ; nullify if taken (forward br.)
bv 0(%r2)
nop
ENDPROC
EXPORT_CODE(G(caml_call_gc))
G(caml_call_gc):
STARTPROC
; Save required size (%r29)
LOADHIGH(G(caml_required_size))
stw %r29, LOW(G(caml_required_size))(%r1)
; Save current allocation pointer for debugging purposes
LOADHIGH(G(caml_young_ptr))
stw %r3, LOW(G(caml_young_ptr))(%r1)
; Record lowest stack address
LOADHIGH(G(caml_bottom_of_stack))
stw %r30, LOW(G(caml_bottom_of_stack))(%r1)
; Record return address
LOADHIGH(G(caml_last_return_address))
stw %r2, LOW(G(caml_last_return_address))(%r1)
; Save the exception handler (if e.g. a sighandler raises)
LOADHIGH(G(caml_exception_pointer))
stw %r5, LOW(G(caml_exception_pointer))(%r1)
; Reserve stack space
; 0x1C0 = 4 * 32 (int regs) + 8 * 32 (float regs) + 64 (for calling C)
ldo 0x1C0(%r30), %r30
; Save caml_gc_regs
L100: ldo -(64 + 4*32)(%r30), %r31
LOADHIGH(G(caml_gc_regs))
stw %r31, LOW(G(caml_gc_regs))(%r1)
; Save all regs used by the code generator
copy %r31, %r1
stws,ma %r6, 4(%r1)
stws,ma %r7, 4(%r1)
stws,ma %r8, 4(%r1)
stws,ma %r9, 4(%r1)
stws,ma %r10, 4(%r1)
stws,ma %r11, 4(%r1)
stws,ma %r12, 4(%r1)
stws,ma %r13, 4(%r1)
stws,ma %r14, 4(%r1)
stws,ma %r15, 4(%r1)
stws,ma %r16, 4(%r1)
stws,ma %r17, 4(%r1)
stws,ma %r18, 4(%r1)
stws,ma %r19, 4(%r1)
stws,ma %r20, 4(%r1)
stws,ma %r21, 4(%r1)
stws,ma %r22, 4(%r1)
stws,ma %r23, 4(%r1)
stws,ma %r24, 4(%r1)
stws,ma %r25, 4(%r1)
stws,ma %r26, 4(%r1)
stws,ma %r28, 4(%r1)
ldo -0x1C0(%r30), %r1
fstds,ma %fr4, 8(%r1)
fstds,ma %fr5, 8(%r1)
fstds,ma %fr6, 8(%r1)
fstds,ma %fr7, 8(%r1)
fstds,ma %fr8, 8(%r1)
fstds,ma %fr9, 8(%r1)
fstds,ma %fr10, 8(%r1)
fstds,ma %fr11, 8(%r1)
fstds,ma %fr12, 8(%r1)
fstds,ma %fr13, 8(%r1)
fstds,ma %fr14, 8(%r1)
fstds,ma %fr15, 8(%r1)
fstds,ma %fr16, 8(%r1)
fstds,ma %fr17, 8(%r1)
fstds,ma %fr18, 8(%r1)
fstds,ma %fr19, 8(%r1)
fstds,ma %fr20, 8(%r1)
fstds,ma %fr21, 8(%r1)
fstds,ma %fr22, 8(%r1)
fstds,ma %fr23, 8(%r1)
fstds,ma %fr24, 8(%r1)
fstds,ma %fr25, 8(%r1)
fstds,ma %fr26, 8(%r1)
fstds,ma %fr27, 8(%r1)
fstds,ma %fr28, 8(%r1)
fstds,ma %fr29, 8(%r1)
fstds,ma %fr30, 8(%r1)
; Call the garbage collector
bl G(caml_garbage_collection), %r2
nop
; Restore all regs used by the code generator
ldo -(64 + 4*32)(%r30), %r1
ldws,ma 4(%r1), %r6
ldws,ma 4(%r1), %r7
ldws,ma 4(%r1), %r8
ldws,ma 4(%r1), %r9
ldws,ma 4(%r1), %r10
ldws,ma 4(%r1), %r11
ldws,ma 4(%r1), %r12
ldws,ma 4(%r1), %r13
ldws,ma 4(%r1), %r14
ldws,ma 4(%r1), %r15
ldws,ma 4(%r1), %r16
ldws,ma 4(%r1), %r17
ldws,ma 4(%r1), %r18
ldws,ma 4(%r1), %r19
ldws,ma 4(%r1), %r20
ldws,ma 4(%r1), %r21
ldws,ma 4(%r1), %r22
ldws,ma 4(%r1), %r23
ldws,ma 4(%r1), %r24
ldws,ma 4(%r1), %r25
ldws,ma 4(%r1), %r26
ldws,ma 4(%r1), %r28
ldo -0x1C0(%r30), %r1
fldds,ma 8(%r1), %fr4
fldds,ma 8(%r1), %fr5
fldds,ma 8(%r1), %fr6
fldds,ma 8(%r1), %fr7
fldds,ma 8(%r1), %fr8
fldds,ma 8(%r1), %fr9
fldds,ma 8(%r1), %fr10
fldds,ma 8(%r1), %fr11
fldds,ma 8(%r1), %fr12
fldds,ma 8(%r1), %fr13
fldds,ma 8(%r1), %fr14
fldds,ma 8(%r1), %fr15
fldds,ma 8(%r1), %fr16
fldds,ma 8(%r1), %fr17
fldds,ma 8(%r1), %fr18
fldds,ma 8(%r1), %fr19
fldds,ma 8(%r1), %fr20
fldds,ma 8(%r1), %fr21
fldds,ma 8(%r1), %fr22
fldds,ma 8(%r1), %fr23
fldds,ma 8(%r1), %fr24
fldds,ma 8(%r1), %fr25
fldds,ma 8(%r1), %fr26
fldds,ma 8(%r1), %fr27
fldds,ma 8(%r1), %fr28
fldds,ma 8(%r1), %fr29
fldds,ma 8(%r1), %fr30
; Reload the allocation pointer
LOADHIGH(G(caml_young_ptr))
ldw LOW(G(caml_young_ptr))(%r1), %r3
; Allocate space for block
LOADHIGH(G(caml_required_size))
ldw LOW(G(caml_required_size))(%r1), %r29
ldw 0(%r4), %r1
sub %r3, %r29, %r3
comb,<< %r3, %r1, L100
nop
; Return to caller
LOADHIGH(G(caml_last_return_address))
ldw LOW(G(caml_last_return_address))(%r1), %r2
bv 0(%r2)
ldo -0x1C0(%r30), %r30
ENDPROC
; Call a C function from Caml
; Function to call is in %r22
.align CODE_ALIGN
#ifdef SYS_hpux
.export G(caml_c_call), ENTRY, ARGW0=GR, ARGW1=GR, ARGW2=GR, ARGW3=GR
#else
EXPORT_CODE(G(caml_c_call))
#endif
G(caml_c_call):
STARTPROC
; Record lowest stack address
LOADHIGH(G(caml_bottom_of_stack))
stw %r30, LOW(G(caml_bottom_of_stack))(%r1)
; Record return address
LOADHIGH(G(caml_last_return_address))
stw %r2, LOW(G(caml_last_return_address))(%r1)
; Save the exception handler
LOADHIGH(G(caml_exception_pointer))
stw %r5, LOW(G(caml_exception_pointer))(%r1)
; Save the allocation pointer
LOADHIGH(G(caml_young_ptr))
stw %r3, LOW(G(caml_young_ptr))(%r1)
; Call the C function
#ifdef SYS_hpux
bl $$dyncall, %r31
#else
ble 0(4, %r22)
#endif
copy %r31, %r2 ; in delay slot
; Reload return address
LOADHIGH(G(caml_last_return_address))
ldw LOW(G(caml_last_return_address))(%r1), %r2
; Reload allocation pointer
LOADHIGH(G(caml_young_ptr))
; Return to caller
bv 0(%r2)
ldw LOW(G(caml_young_ptr))(%r1), %r3 ; in delay slot
ENDPROC
; Start the Caml program
.align CODE_ALIGN
EXPORT_CODE(G(caml_start_program))
G(caml_start_program):
STARTPROC
LOADHIGH(G(caml_program))
ldo LOW(G(caml_program))(%r1), %r22
; Code shared with caml_callback*
L102:
; Save return address
stw %r2,-20(%r30)
ldo 256(%r30), %r30
; Save the callee-save registers
ldo -32(%r30), %r1
stws,ma %r3, -4(%r1)
stws,ma %r4, -4(%r1)
stws,ma %r5, -4(%r1)
stws,ma %r6, -4(%r1)
stws,ma %r7, -4(%r1)
stws,ma %r8, -4(%r1)
stws,ma %r9, -4(%r1)
stws,ma %r10, -4(%r1)
stws,ma %r11, -4(%r1)
stws,ma %r12, -4(%r1)
stws,ma %r13, -4(%r1)
stws,ma %r14, -4(%r1)
stws,ma %r15, -4(%r1)
stws,ma %r16, -4(%r1)
stws,ma %r17, -4(%r1)
stws,ma %r18, -4(%r1)
fstds,ma %fr12, -8(%r1)
fstds,ma %fr13, -8(%r1)
fstds,ma %fr14, -8(%r1)
fstds,ma %fr15, -8(%r1)
fstds,ma %fr16, -8(%r1)
fstds,ma %fr17, -8(%r1)
fstds,ma %fr18, -8(%r1)
fstds,ma %fr19, -8(%r1)
fstds,ma %fr20, -8(%r1)
fstds,ma %fr21, -8(%r1)
fstds,ma %fr22, -8(%r1)
fstds,ma %fr23, -8(%r1)
fstds,ma %fr24, -8(%r1)
fstds,ma %fr25, -8(%r1)
fstds,ma %fr26, -8(%r1)
fstds,ma %fr27, -8(%r1)
fstds,ma %fr28, -8(%r1)
fstds,ma %fr29, -8(%r1)
fstds,ma %fr30, -8(%r1)
fstds,ma %fr31, -8(%r1)
; Set up a callback link
ldo 16(%r30), %r30
LOADHIGH(G(caml_bottom_of_stack))
ldw LOW(G(caml_bottom_of_stack))(%r1), %r1
stw %r1, -16(%r30)
LOADHIGH(G(caml_last_return_address))
ldw LOW(G(caml_last_return_address))(%r1), %r1
stw %r1, -12(%r30)
LOADHIGH(G(caml_gc_regs))
ldw LOW(G(caml_gc_regs))(%r1), %r1
stw %r1, -8(%r30)
; Set up a trap frame to catch exceptions escaping the Caml code
ldo 8(%r30), %r30
LOADHIGH(G(caml_exception_pointer))
ldw LOW(G(caml_exception_pointer))(%r1), %r1
stw %r1, -8(%r30)
LOADHIGHLABEL(L103)
ldo LOWLABEL(L103)(%r1), %r1
stw %r1, -4(%r30)
copy %r30, %r5
; Reload allocation pointers
LOADHIGH(G(caml_young_ptr))
ldw LOW(G(caml_young_ptr))(%r1), %r3
LOADHIGH(G(caml_young_limit))
ldo LOW(G(caml_young_limit))(%r1), %r4
; Call the Caml code
ble 0(4, %r22)
copy %r31, %r2
L104:
; Pop the trap frame
ldw -8(%r30), %r31
LOADHIGH(G(caml_exception_pointer))
stw %r31, LOW(G(caml_exception_pointer))(%r1)
ldo -8(%r30), %r30
; Pop the callback link
L105:
ldw -16(%r30), %r31
LOADHIGH(G(caml_bottom_of_stack))
stw %r31, LOW(G(caml_bottom_of_stack))(%r1)
ldw -12(%r30), %r31
LOADHIGH(G(caml_last_return_address))
stw %r31, LOW(G(caml_last_return_address))(%r1)
ldw -8(%r30), %r31
LOADHIGH(G(caml_gc_regs))
stw %r31, LOW(G(caml_gc_regs))(%r1)
ldo -16(%r30), %r30
; Save allocation pointer
LOADHIGH(G(caml_young_ptr))
stw %r3, LOW(G(caml_young_ptr))(%r1)
; Move result where C function expects it
copy %r26, %r28
; Reload callee-save registers
ldo -32(%r30), %r1
ldws,ma -4(%r1), %r3
ldws,ma -4(%r1), %r4
ldws,ma -4(%r1), %r5
ldws,ma -4(%r1), %r6
ldws,ma -4(%r1), %r7
ldws,ma -4(%r1), %r8
ldws,ma -4(%r1), %r9
ldws,ma -4(%r1), %r10
ldws,ma -4(%r1), %r11
ldws,ma -4(%r1), %r12
ldws,ma -4(%r1), %r13
ldws,ma -4(%r1), %r14
ldws,ma -4(%r1), %r15
ldws,ma -4(%r1), %r16
ldws,ma -4(%r1), %r17
ldws,ma -4(%r1), %r18
fldds,ma -8(%r1), %fr12
fldds,ma -8(%r1), %fr13
fldds,ma -8(%r1), %fr14
fldds,ma -8(%r1), %fr15
fldds,ma -8(%r1), %fr16
fldds,ma -8(%r1), %fr17
fldds,ma -8(%r1), %fr18
fldds,ma -8(%r1), %fr19
fldds,ma -8(%r1), %fr20
fldds,ma -8(%r1), %fr21
fldds,ma -8(%r1), %fr22
fldds,ma -8(%r1), %fr23
fldds,ma -8(%r1), %fr24
fldds,ma -8(%r1), %fr25
fldds,ma -8(%r1), %fr26
fldds,ma -8(%r1), %fr27
fldds,ma -8(%r1), %fr28
fldds,ma -8(%r1), %fr29
fldds,ma -8(%r1), %fr30
fldds,ma -8(%r1), %fr31
; Return to C
ldo -256(%r30), %r30
ldw -20(%r30), %r2
bv 0(%r2)
nop
; The trap handler
L103:
; Save exception pointer
LOADHIGH(G(caml_exception_pointer))
stw %r5, LOW(G(caml_exception_pointer))(%r1)
; Encode exception bucket as an exception result and return it
ldi 2, %r1
or %r26, %r1, %r26
; Return it
b L105
nop
; Re-raise the exception through caml_raise, to clean up local C roots
ldo 64(%r30), %r30
bl G(caml_raise), %r2
nop
ENDPROC
; Raise an exception from C
.align CODE_ALIGN
EXPORT_CODE(G(caml_raise_exception))
G(caml_raise_exception):
STARTPROC
; Cut the stack
LOADHIGH(G(caml_exception_pointer))
ldw LOW(G(caml_exception_pointer))(%r1), %r30
; Reload allocation registers
LOADHIGH(G(caml_young_ptr))
ldw LOW(G(caml_young_ptr))(%r1), %r3
LOADHIGH(G(caml_young_limit))
ldo LOW(G(caml_young_limit))(%r1), %r4
; Raise the exception
ldw -4(%r30), %r1
ldw -8(%r30), %r5
bv 0(%r1)
ldo -8(%r30), %r30 ; in delay slot
ENDPROC
; Callbacks C -> ML
.align CODE_ALIGN
EXPORT_CODE(G(caml_callback_exn))
G(caml_callback_exn):
STARTPROC
; Initial shuffling of arguments
copy %r26, %r1 ; Closure
copy %r25, %r26 ; Argument
copy %r1, %r25
b L102
ldw 0(%r1), %r22 ; Code to call (in delay slot)
ENDPROC
.align CODE_ALIGN
EXPORT_CODE(G(caml_callback2_exn))
G(caml_callback2_exn):
STARTPROC
copy %r26, %r1 ; Closure
copy %r25, %r26 ; First argument
copy %r24, %r25 ; Second argument
copy %r1, %r24
LOADHIGH(G(caml_apply2))
b L102
ldo LOW(G(caml_apply2))(%r1), %r22
ENDPROC
.align CODE_ALIGN
EXPORT_CODE(G(caml_callback3_exn))
G(caml_callback3_exn):
STARTPROC
copy %r26, %r1 ; Closure
copy %r25, %r26 ; First argument
copy %r24, %r25 ; Second argument
copy %r23, %r24 ; Third argument
copy %r1, %r23
LOADHIGH(G(caml_apply3))
b L102
ldo LOW(G(caml_apply3))(%r1), %r22
ENDPROC
.align CODE_ALIGN
EXPORT_CODE(G(caml_ml_array_bound_error))
G(caml_ml_array_bound_error):
STARTPROC
; Load address of [caml_array_bound_error] in %r22
ldil LR%caml_array_bound_error, %r22
ldo RR%caml_array_bound_error(%r22), %r22
; Reserve 48 bytes of stack space and jump to caml_c_call
b G(caml_c_call)
ldo 48(%r30), %r30 /* in delay slot */
ENDPROC
.data
EXPORT_DATA(G(caml_system__frametable))
G(caml_system__frametable):
.long 1 /* one descriptor */
.long L104 + 3 /* return address into callback */
.short -1 /* negative frame size => use callback link */
.short 0 /* no roots */
|
