python-clinic / Modules / _ctypes / libffi / src / mips / ffi.c

   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
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
/* -----------------------------------------------------------------------
   ffi.c - Copyright (c) 2011  Anthony Green
           Copyright (c) 2008  David Daney
           Copyright (c) 1996, 2007, 2008, 2011  Red Hat, Inc.
   
   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
#  if defined(__OpenBSD__)
#    include <mips64/sysarch.h>
#  else
#    include <sys/cachectl.h>
#  endif
#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)
  if (cif->abi != FFI_O32 && cif->abi != FFI_O32_SOFT_FLOAT)
    return FFI_BAD_ABI;
  fn = ffi_closure_O32;
#else
#if _MIPS_SIM ==_ABIN32
  if (cif->abi != FFI_N32
      && cif->abi != FFI_N32_SOFT_FLOAT)
    return FFI_BAD_ABI;
#else
  if (cif->abi != FFI_N64
      && cif->abi != FFI_N64_SOFT_FLOAT)
    return FFI_BAD_ABI;
#endif
  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 */
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.