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
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
|
/* -----------------------------------------------------------------------
ffi.c - Copyright (c) 1996, 2007, 2008 Red Hat, Inc.
Copyright (c) 2008 David Daney
MIPS Foreign Function Interface
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software''), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------- */
#include <ffi.h>
#include <ffi_common.h>
#include <stdlib.h>
#ifdef __GNUC__
# if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 3))
# define USE__BUILTIN___CLEAR_CACHE 1
# endif
#endif
#ifndef USE__BUILTIN___CLEAR_CACHE
#include <sys/cachectl.h>
#endif
#ifdef FFI_DEBUG
# define FFI_MIPS_STOP_HERE() ffi_stop_here()
#else
# define FFI_MIPS_STOP_HERE() do {} while(0)
#endif
#ifdef FFI_MIPS_N32
#define FIX_ARGP \
FFI_ASSERT(argp <= &stack[bytes]); \
if (argp == &stack[bytes]) \
{ \
argp = stack; \
FFI_MIPS_STOP_HERE(); \
}
#else
#define FIX_ARGP
#endif
/* ffi_prep_args is called by the assembly routine once stack space
has been allocated for the function's arguments */
static void ffi_prep_args(char *stack,
extended_cif *ecif,
int bytes,
int flags)
{
int i;
void **p_argv;
char *argp;
ffi_type **p_arg;
#ifdef FFI_MIPS_N32
/* If more than 8 double words are used, the remainder go
on the stack. We reorder stuff on the stack here to
support this easily. */
if (bytes > 8 * sizeof(ffi_arg))
argp = &stack[bytes - (8 * sizeof(ffi_arg))];
else
argp = stack;
#else
argp = stack;
#endif
memset(stack, 0, bytes);
#ifdef FFI_MIPS_N32
if ( ecif->cif->rstruct_flag != 0 )
#else
if ( ecif->cif->rtype->type == FFI_TYPE_STRUCT )
#endif
{
*(ffi_arg *) argp = (ffi_arg) ecif->rvalue;
argp += sizeof(ffi_arg);
FIX_ARGP;
}
p_argv = ecif->avalue;
for (i = 0, p_arg = ecif->cif->arg_types; i < ecif->cif->nargs; i++, p_arg++)
{
size_t z;
unsigned int a;
/* Align if necessary. */
a = (*p_arg)->alignment;
if (a < sizeof(ffi_arg))
a = sizeof(ffi_arg);
if ((a - 1) & (unsigned long) argp)
{
argp = (char *) ALIGN(argp, a);
FIX_ARGP;
}
z = (*p_arg)->size;
if (z <= sizeof(ffi_arg))
{
int type = (*p_arg)->type;
z = sizeof(ffi_arg);
/* The size of a pointer depends on the ABI */
if (type == FFI_TYPE_POINTER)
type = (ecif->cif->abi == FFI_N64
|| ecif->cif->abi == FFI_N64_SOFT_FLOAT)
? FFI_TYPE_SINT64 : FFI_TYPE_SINT32;
if (i < 8 && (ecif->cif->abi == FFI_N32_SOFT_FLOAT
|| ecif->cif->abi == FFI_N64_SOFT_FLOAT))
{
switch (type)
{
case FFI_TYPE_FLOAT:
type = FFI_TYPE_UINT32;
break;
case FFI_TYPE_DOUBLE:
type = FFI_TYPE_UINT64;
break;
default:
break;
}
}
switch (type)
{
case FFI_TYPE_SINT8:
*(ffi_arg *)argp = *(SINT8 *)(* p_argv);
break;
case FFI_TYPE_UINT8:
*(ffi_arg *)argp = *(UINT8 *)(* p_argv);
break;
case FFI_TYPE_SINT16:
*(ffi_arg *)argp = *(SINT16 *)(* p_argv);
break;
case FFI_TYPE_UINT16:
*(ffi_arg *)argp = *(UINT16 *)(* p_argv);
break;
case FFI_TYPE_SINT32:
*(ffi_arg *)argp = *(SINT32 *)(* p_argv);
break;
case FFI_TYPE_UINT32:
*(ffi_arg *)argp = *(UINT32 *)(* p_argv);
break;
/* This can only happen with 64bit slots. */
case FFI_TYPE_FLOAT:
*(float *) argp = *(float *)(* p_argv);
break;
/* Handle structures. */
default:
memcpy(argp, *p_argv, (*p_arg)->size);
break;
}
}
else
{
#ifdef FFI_MIPS_O32
memcpy(argp, *p_argv, z);
#else
{
unsigned long end = (unsigned long) argp + z;
unsigned long cap = (unsigned long) stack + bytes;
/* Check if the data will fit within the register space.
Handle it if it doesn't. */
if (end <= cap)
memcpy(argp, *p_argv, z);
else
{
unsigned long portion = cap - (unsigned long)argp;
memcpy(argp, *p_argv, portion);
argp = stack;
z -= portion;
memcpy(argp, (void*)((unsigned long)(*p_argv) + portion),
z);
}
}
#endif
}
p_argv++;
argp += z;
FIX_ARGP;
}
}
#ifdef FFI_MIPS_N32
/* The n32 spec says that if "a chunk consists solely of a double
float field (but not a double, which is part of a union), it
is passed in a floating point register. Any other chunk is
passed in an integer register". This code traverses structure
definitions and generates the appropriate flags. */
static unsigned
calc_n32_struct_flags(int soft_float, ffi_type *arg,
unsigned *loc, unsigned *arg_reg)
{
unsigned flags = 0;
unsigned index = 0;
ffi_type *e;
if (soft_float)
return 0;
while ((e = arg->elements[index]))
{
/* Align this object. */
*loc = ALIGN(*loc, e->alignment);
if (e->type == FFI_TYPE_DOUBLE)
{
/* Already aligned to FFI_SIZEOF_ARG. */
*arg_reg = *loc / FFI_SIZEOF_ARG;
if (*arg_reg > 7)
break;
flags += (FFI_TYPE_DOUBLE << (*arg_reg * FFI_FLAG_BITS));
*loc += e->size;
}
else
*loc += e->size;
index++;
}
/* Next Argument register at alignment of FFI_SIZEOF_ARG. */
*arg_reg = ALIGN(*loc, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
return flags;
}
static unsigned
calc_n32_return_struct_flags(int soft_float, ffi_type *arg)
{
unsigned flags = 0;
unsigned small = FFI_TYPE_SMALLSTRUCT;
ffi_type *e;
/* Returning structures under n32 is a tricky thing.
A struct with only one or two floating point fields
is returned in $f0 (and $f2 if necessary). Any other
struct results at most 128 bits are returned in $2
(the first 64 bits) and $3 (remainder, if necessary).
Larger structs are handled normally. */
if (arg->size > 16)
return 0;
if (arg->size > 8)
small = FFI_TYPE_SMALLSTRUCT2;
e = arg->elements[0];
if (e->type == FFI_TYPE_DOUBLE)
flags = FFI_TYPE_DOUBLE;
else if (e->type == FFI_TYPE_FLOAT)
flags = FFI_TYPE_FLOAT;
if (flags && (e = arg->elements[1]))
{
if (e->type == FFI_TYPE_DOUBLE)
flags += FFI_TYPE_DOUBLE << FFI_FLAG_BITS;
else if (e->type == FFI_TYPE_FLOAT)
flags += FFI_TYPE_FLOAT << FFI_FLAG_BITS;
else
return small;
if (flags && (arg->elements[2]))
{
/* There are three arguments and the first two are
floats! This must be passed the old way. */
return small;
}
if (soft_float)
flags += FFI_TYPE_STRUCT_SOFT;
}
else
if (!flags)
return small;
return flags;
}
#endif
/* Perform machine dependent cif processing */
ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
{
cif->flags = 0;
#ifdef FFI_MIPS_O32
/* Set the flags necessary for O32 processing. FFI_O32_SOFT_FLOAT
* does not have special handling for floating point args.
*/
if (cif->rtype->type != FFI_TYPE_STRUCT && cif->abi == FFI_O32)
{
if (cif->nargs > 0)
{
switch ((cif->arg_types)[0]->type)
{
case FFI_TYPE_FLOAT:
case FFI_TYPE_DOUBLE:
cif->flags += (cif->arg_types)[0]->type;
break;
default:
break;
}
if (cif->nargs > 1)
{
/* Only handle the second argument if the first
is a float or double. */
if (cif->flags)
{
switch ((cif->arg_types)[1]->type)
{
case FFI_TYPE_FLOAT:
case FFI_TYPE_DOUBLE:
cif->flags += (cif->arg_types)[1]->type << FFI_FLAG_BITS;
break;
default:
break;
}
}
}
}
}
/* Set the return type flag */
if (cif->abi == FFI_O32_SOFT_FLOAT)
{
switch (cif->rtype->type)
{
case FFI_TYPE_VOID:
case FFI_TYPE_STRUCT:
cif->flags += cif->rtype->type << (FFI_FLAG_BITS * 2);
break;
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
case FFI_TYPE_DOUBLE:
cif->flags += FFI_TYPE_UINT64 << (FFI_FLAG_BITS * 2);
break;
case FFI_TYPE_FLOAT:
default:
cif->flags += FFI_TYPE_INT << (FFI_FLAG_BITS * 2);
break;
}
}
else
{
/* FFI_O32 */
switch (cif->rtype->type)
{
case FFI_TYPE_VOID:
case FFI_TYPE_STRUCT:
case FFI_TYPE_FLOAT:
case FFI_TYPE_DOUBLE:
cif->flags += cif->rtype->type << (FFI_FLAG_BITS * 2);
break;
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
cif->flags += FFI_TYPE_UINT64 << (FFI_FLAG_BITS * 2);
break;
default:
cif->flags += FFI_TYPE_INT << (FFI_FLAG_BITS * 2);
break;
}
}
#endif
#ifdef FFI_MIPS_N32
/* Set the flags necessary for N32 processing */
{
int type;
unsigned arg_reg = 0;
unsigned loc = 0;
unsigned count = (cif->nargs < 8) ? cif->nargs : 8;
unsigned index = 0;
unsigned struct_flags = 0;
int soft_float = (cif->abi == FFI_N32_SOFT_FLOAT
|| cif->abi == FFI_N64_SOFT_FLOAT);
if (cif->rtype->type == FFI_TYPE_STRUCT)
{
struct_flags = calc_n32_return_struct_flags(soft_float, cif->rtype);
if (struct_flags == 0)
{
/* This means that the structure is being passed as
a hidden argument */
arg_reg = 1;
count = (cif->nargs < 7) ? cif->nargs : 7;
cif->rstruct_flag = !0;
}
else
cif->rstruct_flag = 0;
}
else
cif->rstruct_flag = 0;
while (count-- > 0 && arg_reg < 8)
{
type = (cif->arg_types)[index]->type;
if (soft_float)
{
switch (type)
{
case FFI_TYPE_FLOAT:
type = FFI_TYPE_UINT32;
break;
case FFI_TYPE_DOUBLE:
type = FFI_TYPE_UINT64;
break;
default:
break;
}
}
switch (type)
{
case FFI_TYPE_FLOAT:
case FFI_TYPE_DOUBLE:
cif->flags +=
((cif->arg_types)[index]->type << (arg_reg * FFI_FLAG_BITS));
arg_reg++;
break;
case FFI_TYPE_LONGDOUBLE:
/* Align it. */
arg_reg = ALIGN(arg_reg, 2);
/* Treat it as two adjacent doubles. */
if (soft_float)
{
arg_reg += 2;
}
else
{
cif->flags +=
(FFI_TYPE_DOUBLE << (arg_reg * FFI_FLAG_BITS));
arg_reg++;
cif->flags +=
(FFI_TYPE_DOUBLE << (arg_reg * FFI_FLAG_BITS));
arg_reg++;
}
break;
case FFI_TYPE_STRUCT:
loc = arg_reg * FFI_SIZEOF_ARG;
cif->flags += calc_n32_struct_flags(soft_float,
(cif->arg_types)[index],
&loc, &arg_reg);
break;
default:
arg_reg++;
break;
}
index++;
}
/* Set the return type flag */
switch (cif->rtype->type)
{
case FFI_TYPE_STRUCT:
{
if (struct_flags == 0)
{
/* The structure is returned through a hidden
first argument. Do nothing, 'cause FFI_TYPE_VOID
is 0 */
}
else
{
/* The structure is returned via some tricky
mechanism */
cif->flags += FFI_TYPE_STRUCT << (FFI_FLAG_BITS * 8);
cif->flags += struct_flags << (4 + (FFI_FLAG_BITS * 8));
}
break;
}
case FFI_TYPE_VOID:
/* Do nothing, 'cause FFI_TYPE_VOID is 0 */
break;
case FFI_TYPE_POINTER:
if (cif->abi == FFI_N32_SOFT_FLOAT || cif->abi == FFI_N32)
cif->flags += FFI_TYPE_SINT32 << (FFI_FLAG_BITS * 8);
else
cif->flags += FFI_TYPE_INT << (FFI_FLAG_BITS * 8);
break;
case FFI_TYPE_FLOAT:
if (soft_float)
{
cif->flags += FFI_TYPE_SINT32 << (FFI_FLAG_BITS * 8);
break;
}
/* else fall through */
case FFI_TYPE_DOUBLE:
if (soft_float)
cif->flags += FFI_TYPE_INT << (FFI_FLAG_BITS * 8);
else
cif->flags += cif->rtype->type << (FFI_FLAG_BITS * 8);
break;
case FFI_TYPE_LONGDOUBLE:
/* Long double is returned as if it were a struct containing
two doubles. */
if (soft_float)
{
cif->flags += FFI_TYPE_STRUCT << (FFI_FLAG_BITS * 8);
cif->flags += FFI_TYPE_SMALLSTRUCT2 << (4 + (FFI_FLAG_BITS * 8));
}
else
{
cif->flags += FFI_TYPE_STRUCT << (FFI_FLAG_BITS * 8);
cif->flags += (FFI_TYPE_DOUBLE
+ (FFI_TYPE_DOUBLE << FFI_FLAG_BITS))
<< (4 + (FFI_FLAG_BITS * 8));
}
break;
default:
cif->flags += FFI_TYPE_INT << (FFI_FLAG_BITS * 8);
break;
}
}
#endif
return FFI_OK;
}
/* Low level routine for calling O32 functions */
extern int ffi_call_O32(void (*)(char *, extended_cif *, int, int),
extended_cif *, unsigned,
unsigned, unsigned *, void (*)(void));
/* Low level routine for calling N32 functions */
extern int ffi_call_N32(void (*)(char *, extended_cif *, int, int),
extended_cif *, unsigned,
unsigned, void *, void (*)(void));
void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
{
extended_cif ecif;
ecif.cif = cif;
ecif.avalue = avalue;
/* If the return value is a struct and we don't have a return */
/* value address then we need to make one */
if ((rvalue == NULL) &&
(cif->rtype->type == FFI_TYPE_STRUCT))
ecif.rvalue = alloca(cif->rtype->size);
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
#ifdef FFI_MIPS_O32
case FFI_O32:
case FFI_O32_SOFT_FLOAT:
ffi_call_O32(ffi_prep_args, &ecif, cif->bytes,
cif->flags, ecif.rvalue, fn);
break;
#endif
#ifdef FFI_MIPS_N32
case FFI_N32:
case FFI_N32_SOFT_FLOAT:
case FFI_N64:
case FFI_N64_SOFT_FLOAT:
{
int copy_rvalue = 0;
int copy_offset = 0;
char *rvalue_copy = ecif.rvalue;
if (cif->rtype->type == FFI_TYPE_STRUCT && cif->rtype->size < 16)
{
/* For structures smaller than 16 bytes we clobber memory
in 8 byte increments. Make a copy so we don't clobber
the callers memory outside of the struct bounds. */
rvalue_copy = alloca(16);
copy_rvalue = 1;
}
else if (cif->rtype->type == FFI_TYPE_FLOAT
&& (cif->abi == FFI_N64_SOFT_FLOAT
|| cif->abi == FFI_N32_SOFT_FLOAT))
{
rvalue_copy = alloca (8);
copy_rvalue = 1;
#if defined(__MIPSEB__) || defined(_MIPSEB)
copy_offset = 4;
#endif
}
ffi_call_N32(ffi_prep_args, &ecif, cif->bytes,
cif->flags, rvalue_copy, fn);
if (copy_rvalue)
memcpy(ecif.rvalue, rvalue_copy + copy_offset, cif->rtype->size);
}
break;
#endif
default:
FFI_ASSERT(0);
break;
}
}
#if FFI_CLOSURES
#if defined(FFI_MIPS_O32)
extern void ffi_closure_O32(void);
#else
extern void ffi_closure_N32(void);
#endif /* FFI_MIPS_O32 */
ffi_status
ffi_prep_closure_loc (ffi_closure *closure,
ffi_cif *cif,
void (*fun)(ffi_cif*,void*,void**,void*),
void *user_data,
void *codeloc)
{
unsigned int *tramp = (unsigned int *) &closure->tramp[0];
void * fn;
char *clear_location = (char *) codeloc;
#if defined(FFI_MIPS_O32)
FFI_ASSERT(cif->abi == FFI_O32 || cif->abi == FFI_O32_SOFT_FLOAT);
fn = ffi_closure_O32;
#else /* FFI_MIPS_N32 */
FFI_ASSERT(cif->abi == FFI_N32 || cif->abi == FFI_N64);
fn = ffi_closure_N32;
#endif /* FFI_MIPS_O32 */
#if defined(FFI_MIPS_O32) || (_MIPS_SIM ==_ABIN32)
/* lui $25,high(fn) */
tramp[0] = 0x3c190000 | ((unsigned)fn >> 16);
/* ori $25,low(fn) */
tramp[1] = 0x37390000 | ((unsigned)fn & 0xffff);
/* lui $12,high(codeloc) */
tramp[2] = 0x3c0c0000 | ((unsigned)codeloc >> 16);
/* jr $25 */
tramp[3] = 0x03200008;
/* ori $12,low(codeloc) */
tramp[4] = 0x358c0000 | ((unsigned)codeloc & 0xffff);
#else
/* N64 has a somewhat larger trampoline. */
/* lui $25,high(fn) */
tramp[0] = 0x3c190000 | ((unsigned long)fn >> 48);
/* lui $12,high(codeloc) */
tramp[1] = 0x3c0c0000 | ((unsigned long)codeloc >> 48);
/* ori $25,mid-high(fn) */
tramp[2] = 0x37390000 | (((unsigned long)fn >> 32 ) & 0xffff);
/* ori $12,mid-high(codeloc) */
tramp[3] = 0x358c0000 | (((unsigned long)codeloc >> 32) & 0xffff);
/* dsll $25,$25,16 */
tramp[4] = 0x0019cc38;
/* dsll $12,$12,16 */
tramp[5] = 0x000c6438;
/* ori $25,mid-low(fn) */
tramp[6] = 0x37390000 | (((unsigned long)fn >> 16 ) & 0xffff);
/* ori $12,mid-low(codeloc) */
tramp[7] = 0x358c0000 | (((unsigned long)codeloc >> 16) & 0xffff);
/* dsll $25,$25,16 */
tramp[8] = 0x0019cc38;
/* dsll $12,$12,16 */
tramp[9] = 0x000c6438;
/* ori $25,low(fn) */
tramp[10] = 0x37390000 | ((unsigned long)fn & 0xffff);
/* jr $25 */
tramp[11] = 0x03200008;
/* ori $12,low(codeloc) */
tramp[12] = 0x358c0000 | ((unsigned long)codeloc & 0xffff);
#endif
closure->cif = cif;
closure->fun = fun;
closure->user_data = user_data;
#ifdef USE__BUILTIN___CLEAR_CACHE
__builtin___clear_cache(clear_location, clear_location + FFI_TRAMPOLINE_SIZE);
#else
cacheflush (clear_location, FFI_TRAMPOLINE_SIZE, ICACHE);
#endif
return FFI_OK;
}
/*
* Decodes the arguments to a function, which will be stored on the
* stack. AR is the pointer to the beginning of the integer arguments
* (and, depending upon the arguments, some floating-point arguments
* as well). FPR is a pointer to the area where floating point
* registers have been saved, if any.
*
* RVALUE is the location where the function return value will be
* stored. CLOSURE is the prepared closure to invoke.
*
* This function should only be called from assembly, which is in
* turn called from a trampoline.
*
* Returns the function return type.
*
* Based on the similar routine for sparc.
*/
int
ffi_closure_mips_inner_O32 (ffi_closure *closure,
void *rvalue, ffi_arg *ar,
double *fpr)
{
ffi_cif *cif;
void **avaluep;
ffi_arg *avalue;
ffi_type **arg_types;
int i, avn, argn, seen_int;
cif = closure->cif;
avalue = alloca (cif->nargs * sizeof (ffi_arg));
avaluep = alloca (cif->nargs * sizeof (ffi_arg));
seen_int = (cif->abi == FFI_O32_SOFT_FLOAT);
argn = 0;
if ((cif->flags >> (FFI_FLAG_BITS * 2)) == FFI_TYPE_STRUCT)
{
rvalue = (void *)(UINT32)ar[0];
argn = 1;
}
i = 0;
avn = cif->nargs;
arg_types = cif->arg_types;
while (i < avn)
{
if (i < 2 && !seen_int &&
(arg_types[i]->type == FFI_TYPE_FLOAT ||
arg_types[i]->type == FFI_TYPE_DOUBLE ||
arg_types[i]->type == FFI_TYPE_LONGDOUBLE))
{
#if defined(__MIPSEB__) || defined(_MIPSEB)
if (arg_types[i]->type == FFI_TYPE_FLOAT)
avaluep[i] = ((char *) &fpr[i]) + sizeof (float);
else
#endif
avaluep[i] = (char *) &fpr[i];
}
else
{
if (arg_types[i]->alignment == 8 && (argn & 0x1))
argn++;
switch (arg_types[i]->type)
{
case FFI_TYPE_SINT8:
avaluep[i] = &avalue[i];
*(SINT8 *) &avalue[i] = (SINT8) ar[argn];
break;
case FFI_TYPE_UINT8:
avaluep[i] = &avalue[i];
*(UINT8 *) &avalue[i] = (UINT8) ar[argn];
break;
case FFI_TYPE_SINT16:
avaluep[i] = &avalue[i];
*(SINT16 *) &avalue[i] = (SINT16) ar[argn];
break;
case FFI_TYPE_UINT16:
avaluep[i] = &avalue[i];
*(UINT16 *) &avalue[i] = (UINT16) ar[argn];
break;
default:
avaluep[i] = (char *) &ar[argn];
break;
}
seen_int = 1;
}
argn += ALIGN(arg_types[i]->size, FFI_SIZEOF_ARG) / FFI_SIZEOF_ARG;
i++;
}
/* Invoke the closure. */
(closure->fun) (cif, rvalue, avaluep, closure->user_data);
if (cif->abi == FFI_O32_SOFT_FLOAT)
{
switch (cif->rtype->type)
{
case FFI_TYPE_FLOAT:
return FFI_TYPE_INT;
case FFI_TYPE_DOUBLE:
return FFI_TYPE_UINT64;
default:
return cif->rtype->type;
}
}
else
{
return cif->rtype->type;
}
}
#if defined(FFI_MIPS_N32)
static void
copy_struct_N32(char *target, unsigned offset, ffi_abi abi, ffi_type *type,
int argn, unsigned arg_offset, ffi_arg *ar,
ffi_arg *fpr, int soft_float)
{
ffi_type **elt_typep = type->elements;
while(*elt_typep)
{
ffi_type *elt_type = *elt_typep;
unsigned o;
char *tp;
char *argp;
char *fpp;
o = ALIGN(offset, elt_type->alignment);
arg_offset += o - offset;
offset = o;
argn += arg_offset / sizeof(ffi_arg);
arg_offset = arg_offset % sizeof(ffi_arg);
argp = (char *)(ar + argn);
fpp = (char *)(argn >= 8 ? ar + argn : fpr + argn);
tp = target + offset;
if (elt_type->type == FFI_TYPE_DOUBLE && !soft_float)
*(double *)tp = *(double *)fpp;
else
memcpy(tp, argp + arg_offset, elt_type->size);
offset += elt_type->size;
arg_offset += elt_type->size;
elt_typep++;
argn += arg_offset / sizeof(ffi_arg);
arg_offset = arg_offset % sizeof(ffi_arg);
}
}
/*
* Decodes the arguments to a function, which will be stored on the
* stack. AR is the pointer to the beginning of the integer
* arguments. FPR is a pointer to the area where floating point
* registers have been saved.
*
* RVALUE is the location where the function return value will be
* stored. CLOSURE is the prepared closure to invoke.
*
* This function should only be called from assembly, which is in
* turn called from a trampoline.
*
* Returns the function return flags.
*
*/
int
ffi_closure_mips_inner_N32 (ffi_closure *closure,
void *rvalue, ffi_arg *ar,
ffi_arg *fpr)
{
ffi_cif *cif;
void **avaluep;
ffi_arg *avalue;
ffi_type **arg_types;
int i, avn, argn;
int soft_float;
ffi_arg *argp;
cif = closure->cif;
soft_float = cif->abi == FFI_N64_SOFT_FLOAT
|| cif->abi == FFI_N32_SOFT_FLOAT;
avalue = alloca (cif->nargs * sizeof (ffi_arg));
avaluep = alloca (cif->nargs * sizeof (ffi_arg));
argn = 0;
if (cif->rstruct_flag)
{
#if _MIPS_SIM==_ABIN32
rvalue = (void *)(UINT32)ar[0];
#else /* N64 */
rvalue = (void *)ar[0];
#endif
argn = 1;
}
i = 0;
avn = cif->nargs;
arg_types = cif->arg_types;
while (i < avn)
{
if (arg_types[i]->type == FFI_TYPE_FLOAT
|| arg_types[i]->type == FFI_TYPE_DOUBLE
|| arg_types[i]->type == FFI_TYPE_LONGDOUBLE)
{
argp = (argn >= 8 || soft_float) ? ar + argn : fpr + argn;
if ((arg_types[i]->type == FFI_TYPE_LONGDOUBLE) && ((unsigned)argp & (arg_types[i]->alignment-1)))
{
argp=(ffi_arg*)ALIGN(argp,arg_types[i]->alignment);
argn++;
}
#if defined(__MIPSEB__) || defined(_MIPSEB)
if (arg_types[i]->type == FFI_TYPE_FLOAT && argn < 8)
avaluep[i] = ((char *) argp) + sizeof (float);
else
#endif
avaluep[i] = (char *) argp;
}
else
{
unsigned type = arg_types[i]->type;
if (arg_types[i]->alignment > sizeof(ffi_arg))
argn = ALIGN(argn, arg_types[i]->alignment / sizeof(ffi_arg));
argp = ar + argn;
/* The size of a pointer depends on the ABI */
if (type == FFI_TYPE_POINTER)
type = (cif->abi == FFI_N64 || cif->abi == FFI_N64_SOFT_FLOAT)
? FFI_TYPE_SINT64 : FFI_TYPE_SINT32;
if (soft_float && type == FFI_TYPE_FLOAT)
type = FFI_TYPE_UINT32;
switch (type)
{
case FFI_TYPE_SINT8:
avaluep[i] = &avalue[i];
*(SINT8 *) &avalue[i] = (SINT8) *argp;
break;
case FFI_TYPE_UINT8:
avaluep[i] = &avalue[i];
*(UINT8 *) &avalue[i] = (UINT8) *argp;
break;
case FFI_TYPE_SINT16:
avaluep[i] = &avalue[i];
*(SINT16 *) &avalue[i] = (SINT16) *argp;
break;
case FFI_TYPE_UINT16:
avaluep[i] = &avalue[i];
*(UINT16 *) &avalue[i] = (UINT16) *argp;
break;
case FFI_TYPE_SINT32:
avaluep[i] = &avalue[i];
*(SINT32 *) &avalue[i] = (SINT32) *argp;
break;
case FFI_TYPE_UINT32:
avaluep[i] = &avalue[i];
*(UINT32 *) &avalue[i] = (UINT32) *argp;
break;
case FFI_TYPE_STRUCT:
if (argn < 8)
{
/* Allocate space for the struct as at least part of
it was passed in registers. */
avaluep[i] = alloca(arg_types[i]->size);
copy_struct_N32(avaluep[i], 0, cif->abi, arg_types[i],
argn, 0, ar, fpr, soft_float);
break;
}
/* Else fall through. */
default:
avaluep[i] = (char *) argp;
break;
}
}
argn += ALIGN(arg_types[i]->size, sizeof(ffi_arg)) / sizeof(ffi_arg);
i++;
}
/* Invoke the closure. */
(closure->fun) (cif, rvalue, avaluep, closure->user_data);
return cif->flags >> (FFI_FLAG_BITS * 8);
}
#endif /* FFI_MIPS_N32 */
#endif /* FFI_CLOSURES */
|