opcodes/bpf-ibld.c

   1 /* DO NOT EDIT!  -*- buffer-read-only: t -*- vi:set ro:  */
   2 /* Instruction building/extraction support for bpf. -*- C -*-
   3
   4    THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
   5    - the resultant file is machine generated, cgen-ibld.in isn't
   6
   7    Copyright (C) 1996-2020 Free Software Foundation, Inc.
   8
   9    This file is part of libopcodes.
  10
  11    This library is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3, or (at your option)
  14    any later version.
  15
  16    It is distributed in the hope that it will be useful, but WITHOUT
  17    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  18    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  19    License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software Foundation, Inc.,
  23    51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  24
  25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
  26    Keep that in mind.  */
  27
  28 #include "sysdep.h"
  29 #include <stdio.h>
  30 #include "ansidecl.h"
  31 #include "dis-asm.h"
  32 #include "bfd.h"
  33 #include "symcat.h"
  34 #include "bpf-desc.h"
  35 #include "bpf-opc.h"
  36 #include "cgen/basic-modes.h"
  37 #include "opintl.h"
  38 #include "safe-ctype.h"
  39
  40 #undef  min
  41 #define min(a,b) ((a) < (b) ? (a) : (b))
  42 #undef  max
  43 #define max(a,b) ((a) > (b) ? (a) : (b))
  44
  45 /* Used by the ifield rtx function.  */
  46 #define FLD(f) (fields->f)
  47
  48 static const char * insert_normal
  49   (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
  50    unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
  51 static const char * insert_insn_normal
  52   (CGEN_CPU_DESC, const CGEN_INSN *,
  53    CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
  54 static int extract_normal
  55   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
  56    unsigned int, unsigned int, unsigned int, unsigned int,
  57    unsigned int, unsigned int, bfd_vma, long *);
  58 static int extract_insn_normal
  59   (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
  60    CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
  61 #if CGEN_INT_INSN_P
  62 static void put_insn_int_value
  63   (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
  64 #endif
  65 #if ! CGEN_INT_INSN_P
  66 static CGEN_INLINE void insert_1
  67   (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
  68 static CGEN_INLINE int fill_cache
  69   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *,  int, int, bfd_vma);
  70 static CGEN_INLINE long extract_1
  71   (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
  72 #endif
  73 \f
  74 /* Operand insertion.  */
  75
  76 #if ! CGEN_INT_INSN_P
  77
  78 /* Subroutine of insert_normal.  */
  79
  80 static CGEN_INLINE void
  81 insert_1 (CGEN_CPU_DESC cd,
  82           unsigned long value,
  83           int start,
  84           int length,
  85           int word_length,
  86           unsigned char *bufp)
  87 {
  88   unsigned long x,mask;
  89   int shift;
  90
  91   x = cgen_get_insn_value (cd, bufp, word_length);
  92
  93   /* Written this way to avoid undefined behaviour.  */
  94   mask = (((1L << (length - 1)) - 1) << 1) | 1;
  95   if (CGEN_INSN_LSB0_P)
  96     shift = (start + 1) - length;
  97   else
  98     shift = (word_length - (start + length));
  99   x = (x & ~(mask << shift)) | ((value & mask) << shift);
 100
 101   cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
 102 }
 103
 104 #endif /* ! CGEN_INT_INSN_P */
 105
 106 /* Default insertion routine.
 107
 108    ATTRS is a mask of the boolean attributes.
 109    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 110    WORD_LENGTH is the length of the word in bits in which the value resides.
 111    START is the starting bit number in the word, architecture origin.
 112    LENGTH is the length of VALUE in bits.
 113    TOTAL_LENGTH is the total length of the insn in bits.
 114
 115    The result is an error message or NULL if success.  */
 116
 117 /* ??? This duplicates functionality with bfd's howto table and
 118    bfd_install_relocation.  */
 119 /* ??? This doesn't handle bfd_vma's.  Create another function when
 120    necessary.  */
 121
 122 static const char *
 123 insert_normal (CGEN_CPU_DESC cd,
 124                long value,
 125                unsigned int attrs,
 126                unsigned int word_offset,
 127                unsigned int start,
 128                unsigned int length,
 129                unsigned int word_length,
 130                unsigned int total_length,
 131                CGEN_INSN_BYTES_PTR buffer)
 132 {
 133   static char errbuf[100];
 134   /* Written this way to avoid undefined behaviour.  */
 135   unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
 136
 137   /* If LENGTH is zero, this operand doesn't contribute to the value.  */
 138   if (length == 0)
 139     return NULL;
 140
 141   if (word_length > 8 * sizeof (CGEN_INSN_INT))
 142     abort ();
 143
 144   /* For architectures with insns smaller than the base-insn-bitsize,
 145      word_length may be too big.  */
 146   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 147     {
 148       if (word_offset == 0
 149           && word_length > total_length)
 150         word_length = total_length;
 151     }
 152
 153   /* Ensure VALUE will fit.  */
 154   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
 155     {
 156       long minval = - (1L << (length - 1));
 157       unsigned long maxval = mask;
 158
 159       if ((value > 0 && (unsigned long) value > maxval)
 160           || value < minval)
 161         {
 162           /* xgettext:c-format */
 163           sprintf (errbuf,
 164                    _("operand out of range (%ld not between %ld and %lu)"),
 165                    value, minval, maxval);
 166           return errbuf;
 167         }
 168     }
 169   else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
 170     {
 171       unsigned long maxval = mask;
 172       unsigned long val = (unsigned long) value;
 173
 174       /* For hosts with a word size > 32 check to see if value has been sign
 175          extended beyond 32 bits.  If so then ignore these higher sign bits
 176          as the user is attempting to store a 32-bit signed value into an
 177          unsigned 32-bit field which is allowed.  */
 178       if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
 179         val &= 0xFFFFFFFF;
 180
 181       if (val > maxval)
 182         {
 183           /* xgettext:c-format */
 184           sprintf (errbuf,
 185                    _("operand out of range (0x%lx not between 0 and 0x%lx)"),
 186                    val, maxval);
 187           return errbuf;
 188         }
 189     }
 190   else
 191     {
 192       if (! cgen_signed_overflow_ok_p (cd))
 193         {
 194           long minval = - (1L << (length - 1));
 195           long maxval =   (1L << (length - 1)) - 1;
 196
 197           if (value < minval || value > maxval)
 198             {
 199               sprintf
 200                 /* xgettext:c-format */
 201                 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
 202                  value, minval, maxval);
 203               return errbuf;
 204             }
 205         }
 206     }
 207
 208 #if CGEN_INT_INSN_P
 209
 210   {
 211     int shift_within_word, shift_to_word, shift;
 212
 213     /* How to shift the value to BIT0 of the word.  */
 214     shift_to_word = total_length - (word_offset + word_length);
 215
 216     /* How to shift the value to the field within the word.  */
 217     if (CGEN_INSN_LSB0_P)
 218       shift_within_word = start + 1 - length;
 219     else
 220       shift_within_word = word_length - start - length;
 221
 222     /* The total SHIFT, then mask in the value.  */
 223     shift = shift_to_word + shift_within_word;
 224     *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
 225   }
 226
 227 #else /* ! CGEN_INT_INSN_P */
 228
 229   {
 230     unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
 231
 232     insert_1 (cd, value, start, length, word_length, bufp);
 233   }
 234
 235 #endif /* ! CGEN_INT_INSN_P */
 236
 237   return NULL;
 238 }
 239
 240 /* Default insn builder (insert handler).
 241    The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
 242    that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
 243    recorded in host byte order, otherwise BUFFER is an array of bytes
 244    and the value is recorded in target byte order).
 245    The result is an error message or NULL if success.  */
 246
 247 static const char *
 248 insert_insn_normal (CGEN_CPU_DESC cd,
 249                     const CGEN_INSN * insn,
 250                     CGEN_FIELDS * fields,
 251                     CGEN_INSN_BYTES_PTR buffer,
 252                     bfd_vma pc)
 253 {
 254   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 255   unsigned long value;
 256   const CGEN_SYNTAX_CHAR_TYPE * syn;
 257
 258   CGEN_INIT_INSERT (cd);
 259   value = CGEN_INSN_BASE_VALUE (insn);
 260
 261   /* If we're recording insns as numbers (rather than a string of bytes),
 262      target byte order handling is deferred until later.  */
 263
 264 #if CGEN_INT_INSN_P
 265
 266   put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
 267                       CGEN_FIELDS_BITSIZE (fields), value);
 268
 269 #else
 270
 271   cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
 272                                         (unsigned) CGEN_FIELDS_BITSIZE (fields)),
 273                        value);
 274
 275 #endif /* ! CGEN_INT_INSN_P */
 276
 277   /* ??? It would be better to scan the format's fields.
 278      Still need to be able to insert a value based on the operand though;
 279      e.g. storing a branch displacement that got resolved later.
 280      Needs more thought first.  */
 281
 282   for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
 283     {
 284       const char *errmsg;
 285
 286       if (CGEN_SYNTAX_CHAR_P (* syn))
 287         continue;
 288
 289       errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 290                                        fields, buffer, pc);
 291       if (errmsg)
 292         return errmsg;
 293     }
 294
 295   return NULL;
 296 }
 297
 298 #if CGEN_INT_INSN_P
 299 /* Cover function to store an insn value into an integral insn.  Must go here
 300    because it needs <prefix>-desc.h for CGEN_INT_INSN_P.  */
 301
 302 static void
 303 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 304                     CGEN_INSN_BYTES_PTR buf,
 305                     int length,
 306                     int insn_length,
 307                     CGEN_INSN_INT value)
 308 {
 309   /* For architectures with insns smaller than the base-insn-bitsize,
 310      length may be too big.  */
 311   if (length > insn_length)
 312     *buf = value;
 313   else
 314     {
 315       int shift = insn_length - length;
 316       /* Written this way to avoid undefined behaviour.  */
 317       CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
 318
 319       *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
 320     }
 321 }
 322 #endif
 323 \f
 324 /* Operand extraction.  */
 325
 326 #if ! CGEN_INT_INSN_P
 327
 328 /* Subroutine of extract_normal.
 329    Ensure sufficient bytes are cached in EX_INFO.
 330    OFFSET is the offset in bytes from the start of the insn of the value.
 331    BYTES is the length of the needed value.
 332    Returns 1 for success, 0 for failure.  */
 333
 334 static CGEN_INLINE int
 335 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 336             CGEN_EXTRACT_INFO *ex_info,
 337             int offset,
 338             int bytes,
 339             bfd_vma pc)
 340 {
 341   /* It's doubtful that the middle part has already been fetched so
 342      we don't optimize that case.  kiss.  */
 343   unsigned int mask;
 344   disassemble_info *info = (disassemble_info *) ex_info->dis_info;
 345
 346   /* First do a quick check.  */
 347   mask = (1 << bytes) - 1;
 348   if (((ex_info->valid >> offset) & mask) == mask)
 349     return 1;
 350
 351   /* Search for the first byte we need to read.  */
 352   for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
 353     if (! (mask & ex_info->valid))
 354       break;
 355
 356   if (bytes)
 357     {
 358       int status;
 359
 360       pc += offset;
 361       status = (*info->read_memory_func)
 362         (pc, ex_info->insn_bytes + offset, bytes, info);
 363
 364       if (status != 0)
 365         {
 366           (*info->memory_error_func) (status, pc, info);
 367           return 0;
 368         }
 369
 370       ex_info->valid |= ((1 << bytes) - 1) << offset;
 371     }
 372
 373   return 1;
 374 }
 375
 376 /* Subroutine of extract_normal.  */
 377
 378 static CGEN_INLINE long
 379 extract_1 (CGEN_CPU_DESC cd,
 380            CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 381            int start,
 382            int length,
 383            int word_length,
 384            unsigned char *bufp,
 385            bfd_vma pc ATTRIBUTE_UNUSED)
 386 {
 387   unsigned long x;
 388   int shift;
 389
 390   x = cgen_get_insn_value (cd, bufp, word_length);
 391
 392   if (CGEN_INSN_LSB0_P)
 393     shift = (start + 1) - length;
 394   else
 395     shift = (word_length - (start + length));
 396   return x >> shift;
 397 }
 398
 399 #endif /* ! CGEN_INT_INSN_P */
 400
 401 /* Default extraction routine.
 402
 403    INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
 404    or sometimes less for cases like the m32r where the base insn size is 32
 405    but some insns are 16 bits.
 406    ATTRS is a mask of the boolean attributes.  We only need `SIGNED',
 407    but for generality we take a bitmask of all of them.
 408    WORD_OFFSET is the offset in bits from the start of the insn of the value.
 409    WORD_LENGTH is the length of the word in bits in which the value resides.
 410    START is the starting bit number in the word, architecture origin.
 411    LENGTH is the length of VALUE in bits.
 412    TOTAL_LENGTH is the total length of the insn in bits.
 413
 414    Returns 1 for success, 0 for failure.  */
 415
 416 /* ??? The return code isn't properly used.  wip.  */
 417
 418 /* ??? This doesn't handle bfd_vma's.  Create another function when
 419    necessary.  */
 420
 421 static int
 422 extract_normal (CGEN_CPU_DESC cd,
 423 #if ! CGEN_INT_INSN_P
 424                 CGEN_EXTRACT_INFO *ex_info,
 425 #else
 426                 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
 427 #endif
 428                 CGEN_INSN_INT insn_value,
 429                 unsigned int attrs,
 430                 unsigned int word_offset,
 431                 unsigned int start,
 432                 unsigned int length,
 433                 unsigned int word_length,
 434                 unsigned int total_length,
 435 #if ! CGEN_INT_INSN_P
 436                 bfd_vma pc,
 437 #else
 438                 bfd_vma pc ATTRIBUTE_UNUSED,
 439 #endif
 440                 long *valuep)
 441 {
 442   long value, mask;
 443
 444   /* If LENGTH is zero, this operand doesn't contribute to the value
 445      so give it a standard value of zero.  */
 446   if (length == 0)
 447     {
 448       *valuep = 0;
 449       return 1;
 450     }
 451
 452   if (word_length > 8 * sizeof (CGEN_INSN_INT))
 453     abort ();
 454
 455   /* For architectures with insns smaller than the insn-base-bitsize,
 456      word_length may be too big.  */
 457   if (cd->min_insn_bitsize < cd->base_insn_bitsize)
 458     {
 459       if (word_offset + word_length > total_length)
 460         word_length = total_length - word_offset;
 461     }
 462
 463   /* Does the value reside in INSN_VALUE, and at the right alignment?  */
 464
 465   if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
 466     {
 467       if (CGEN_INSN_LSB0_P)
 468         value = insn_value >> ((word_offset + start + 1) - length);
 469       else
 470         value = insn_value >> (total_length - ( word_offset + start + length));
 471     }
 472
 473 #if ! CGEN_INT_INSN_P
 474
 475   else
 476     {
 477       unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
 478
 479       if (word_length > 8 * sizeof (CGEN_INSN_INT))
 480         abort ();
 481
 482       if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
 483         {
 484           *valuep = 0;
 485           return 0;
 486         }
 487
 488       value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
 489     }
 490
 491 #endif /* ! CGEN_INT_INSN_P */
 492
 493   /* Written this way to avoid undefined behaviour.  */
 494   mask = (((1L << (length - 1)) - 1) << 1) | 1;
 495
 496   value &= mask;
 497   /* sign extend? */
 498   if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
 499       && (value & (1L << (length - 1))))
 500     value |= ~mask;
 501
 502   *valuep = value;
 503
 504   return 1;
 505 }
 506
 507 /* Default insn extractor.
 508
 509    INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
 510    The extracted fields are stored in FIELDS.
 511    EX_INFO is used to handle reading variable length insns.
 512    Return the length of the insn in bits, or 0 if no match,
 513    or -1 if an error occurs fetching data (memory_error_func will have
 514    been called).  */
 515
 516 static int
 517 extract_insn_normal (CGEN_CPU_DESC cd,
 518                      const CGEN_INSN *insn,
 519                      CGEN_EXTRACT_INFO *ex_info,
 520                      CGEN_INSN_INT insn_value,
 521                      CGEN_FIELDS *fields,
 522                      bfd_vma pc)
 523 {
 524   const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
 525   const CGEN_SYNTAX_CHAR_TYPE *syn;
 526
 527   CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
 528
 529   CGEN_INIT_EXTRACT (cd);
 530
 531   for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
 532     {
 533       int length;
 534
 535       if (CGEN_SYNTAX_CHAR_P (*syn))
 536         continue;
 537
 538       length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
 539                                         ex_info, insn_value, fields, pc);
 540       if (length <= 0)
 541         return length;
 542     }
 543
 544   /* We recognized and successfully extracted this insn.  */
 545   return CGEN_INSN_BITSIZE (insn);
 546 }
 547 \f
 548 /* Machine generated code added here.  */
 549
 550 const char * bpf_cgen_insert_operand
 551   (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
 552
 553 /* Main entry point for operand insertion.
 554
 555    This function is basically just a big switch statement.  Earlier versions
 556    used tables to look up the function to use, but
 557    - if the table contains both assembler and disassembler functions then
 558      the disassembler contains much of the assembler and vice-versa,
 559    - there's a lot of inlining possibilities as things grow,
 560    - using a switch statement avoids the function call overhead.
 561
 562    This function could be moved into `parse_insn_normal', but keeping it
 563    separate makes clear the interface between `parse_insn_normal' and each of
 564    the handlers.  It's also needed by GAS to insert operands that couldn't be
 565    resolved during parsing.  */
 566
 567 const char *
 568 bpf_cgen_insert_operand (CGEN_CPU_DESC cd,
 569                              int opindex,
 570                              CGEN_FIELDS * fields,
 571                              CGEN_INSN_BYTES_PTR buffer,
 572                              bfd_vma pc ATTRIBUTE_UNUSED)
 573 {
 574   const char * errmsg = NULL;
 575   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 576
 577   switch (opindex)
 578     {
 579     case BPF_OPERAND_DISP16 :
 580       errmsg = insert_normal (cd, fields->f_offset16, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, buffer);
 581       break;
 582     case BPF_OPERAND_DISP32 :
 583       errmsg = insert_normal (cd, fields->f_imm32, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, buffer);
 584       break;
 585     case BPF_OPERAND_DSTBE :
 586       errmsg = insert_normal (cd, fields->f_dstbe, 0, 8, 7, 4, 8, total_length, buffer);
 587       break;
 588     case BPF_OPERAND_DSTLE :
 589       errmsg = insert_normal (cd, fields->f_dstle, 0, 8, 3, 4, 8, total_length, buffer);
 590       break;
 591     case BPF_OPERAND_ENDSIZE :
 592       errmsg = insert_normal (cd, fields->f_imm32, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, buffer);
 593       break;
 594     case BPF_OPERAND_IMM32 :
 595       errmsg = insert_normal (cd, fields->f_imm32, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, buffer);
 596       break;
 597     case BPF_OPERAND_IMM64 :
 598       {
 599 {
 600   FLD (f_imm64_b) = 0;
 601   FLD (f_imm64_c) = ((UDI) (FLD (f_imm64)) >> (32));
 602   FLD (f_imm64_a) = ((FLD (f_imm64)) & (MAKEDI (0, 0xffffffff)));
 603 }
 604         errmsg = insert_normal (cd, fields->f_imm64_a, 0, 32, 31, 32, 32, total_length, buffer);
 605         if (errmsg)
 606           break;
 607         errmsg = insert_normal (cd, fields->f_imm64_b, 0, 64, 31, 32, 32, total_length, buffer);
 608         if (errmsg)
 609           break;
 610         errmsg = insert_normal (cd, fields->f_imm64_c, 0, 96, 31, 32, 32, total_length, buffer);
 611         if (errmsg)
 612           break;
 613       }
 614       break;
 615     case BPF_OPERAND_OFFSET16 :
 616       errmsg = insert_normal (cd, fields->f_offset16, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, buffer);
 617       break;
 618     case BPF_OPERAND_SRCBE :
 619       errmsg = insert_normal (cd, fields->f_srcbe, 0, 8, 3, 4, 8, total_length, buffer);
 620       break;
 621     case BPF_OPERAND_SRCLE :
 622       errmsg = insert_normal (cd, fields->f_srcle, 0, 8, 7, 4, 8, total_length, buffer);
 623       break;
 624
 625     default :
 626       /* xgettext:c-format */
 627       opcodes_error_handler
 628         (_("internal error: unrecognized field %d while building insn"),
 629          opindex);
 630       abort ();
 631   }
 632
 633   return errmsg;
 634 }
 635
 636 int bpf_cgen_extract_operand
 637   (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
 638
 639 /* Main entry point for operand extraction.
 640    The result is <= 0 for error, >0 for success.
 641    ??? Actual values aren't well defined right now.
 642
 643    This function is basically just a big switch statement.  Earlier versions
 644    used tables to look up the function to use, but
 645    - if the table contains both assembler and disassembler functions then
 646      the disassembler contains much of the assembler and vice-versa,
 647    - there's a lot of inlining possibilities as things grow,
 648    - using a switch statement avoids the function call overhead.
 649
 650    This function could be moved into `print_insn_normal', but keeping it
 651    separate makes clear the interface between `print_insn_normal' and each of
 652    the handlers.  */
 653
 654 int
 655 bpf_cgen_extract_operand (CGEN_CPU_DESC cd,
 656                              int opindex,
 657                              CGEN_EXTRACT_INFO *ex_info,
 658                              CGEN_INSN_INT insn_value,
 659                              CGEN_FIELDS * fields,
 660                              bfd_vma pc)
 661 {
 662   /* Assume success (for those operands that are nops).  */
 663   int length = 1;
 664   unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
 665
 666   switch (opindex)
 667     {
 668     case BPF_OPERAND_DISP16 :
 669       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, pc, & fields->f_offset16);
 670       break;
 671     case BPF_OPERAND_DISP32 :
 672       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, pc, & fields->f_imm32);
 673       break;
 674     case BPF_OPERAND_DSTBE :
 675       length = extract_normal (cd, ex_info, insn_value, 0, 8, 7, 4, 8, total_length, pc, & fields->f_dstbe);
 676       break;
 677     case BPF_OPERAND_DSTLE :
 678       length = extract_normal (cd, ex_info, insn_value, 0, 8, 3, 4, 8, total_length, pc, & fields->f_dstle);
 679       break;
 680     case BPF_OPERAND_ENDSIZE :
 681       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, pc, & fields->f_imm32);
 682       break;
 683     case BPF_OPERAND_IMM32 :
 684       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 32, 31, 32, 32, total_length, pc, & fields->f_imm32);
 685       break;
 686     case BPF_OPERAND_IMM64 :
 687       {
 688         length = extract_normal (cd, ex_info, insn_value, 0, 32, 31, 32, 32, total_length, pc, & fields->f_imm64_a);
 689         if (length <= 0) break;
 690         length = extract_normal (cd, ex_info, insn_value, 0, 64, 31, 32, 32, total_length, pc, & fields->f_imm64_b);
 691         if (length <= 0) break;
 692         length = extract_normal (cd, ex_info, insn_value, 0, 96, 31, 32, 32, total_length, pc, & fields->f_imm64_c);
 693         if (length <= 0) break;
 694 {
 695   FLD (f_imm64) = ((((((UDI) (UINT) (FLD (f_imm64_c)))) << (32))) | (((UDI) (UINT) (FLD (f_imm64_a)))));
 696 }
 697       }
 698       break;
 699     case BPF_OPERAND_OFFSET16 :
 700       length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 16, 15, 16, 16, total_length, pc, & fields->f_offset16);
 701       break;
 702     case BPF_OPERAND_SRCBE :
 703       length = extract_normal (cd, ex_info, insn_value, 0, 8, 3, 4, 8, total_length, pc, & fields->f_srcbe);
 704       break;
 705     case BPF_OPERAND_SRCLE :
 706       length = extract_normal (cd, ex_info, insn_value, 0, 8, 7, 4, 8, total_length, pc, & fields->f_srcle);
 707       break;
 708
 709     default :
 710       /* xgettext:c-format */
 711       opcodes_error_handler
 712         (_("internal error: unrecognized field %d while decoding insn"),
 713          opindex);
 714       abort ();
 715     }
 716
 717   return length;
 718 }
 719
 720 cgen_insert_fn * const bpf_cgen_insert_handlers[] =
 721 {
 722   insert_insn_normal,
 723 };
 724
 725 cgen_extract_fn * const bpf_cgen_extract_handlers[] =
 726 {
 727   extract_insn_normal,
 728 };
 729
 730 int bpf_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 731 bfd_vma bpf_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
 732
 733 /* Getting values from cgen_fields is handled by a collection of functions.
 734    They are distinguished by the type of the VALUE argument they return.
 735    TODO: floating point, inlining support, remove cases where result type
 736    not appropriate.  */
 737
 738 int
 739 bpf_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 740                              int opindex,
 741                              const CGEN_FIELDS * fields)
 742 {
 743   int value;
 744
 745   switch (opindex)
 746     {
 747     case BPF_OPERAND_DISP16 :
 748       value = fields->f_offset16;
 749       break;
 750     case BPF_OPERAND_DISP32 :
 751       value = fields->f_imm32;
 752       break;
 753     case BPF_OPERAND_DSTBE :
 754       value = fields->f_dstbe;
 755       break;
 756     case BPF_OPERAND_DSTLE :
 757       value = fields->f_dstle;
 758       break;
 759     case BPF_OPERAND_ENDSIZE :
 760       value = fields->f_imm32;
 761       break;
 762     case BPF_OPERAND_IMM32 :
 763       value = fields->f_imm32;
 764       break;
 765     case BPF_OPERAND_IMM64 :
 766       value = fields->f_imm64;
 767       break;
 768     case BPF_OPERAND_OFFSET16 :
 769       value = fields->f_offset16;
 770       break;
 771     case BPF_OPERAND_SRCBE :
 772       value = fields->f_srcbe;
 773       break;
 774     case BPF_OPERAND_SRCLE :
 775       value = fields->f_srcle;
 776       break;
 777
 778     default :
 779       /* xgettext:c-format */
 780       opcodes_error_handler
 781         (_("internal error: unrecognized field %d while getting int operand"),
 782          opindex);
 783       abort ();
 784   }
 785
 786   return value;
 787 }
 788
 789 bfd_vma
 790 bpf_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 791                              int opindex,
 792                              const CGEN_FIELDS * fields)
 793 {
 794   bfd_vma value;
 795
 796   switch (opindex)
 797     {
 798     case BPF_OPERAND_DISP16 :
 799       value = fields->f_offset16;
 800       break;
 801     case BPF_OPERAND_DISP32 :
 802       value = fields->f_imm32;
 803       break;
 804     case BPF_OPERAND_DSTBE :
 805       value = fields->f_dstbe;
 806       break;
 807     case BPF_OPERAND_DSTLE :
 808       value = fields->f_dstle;
 809       break;
 810     case BPF_OPERAND_ENDSIZE :
 811       value = fields->f_imm32;
 812       break;
 813     case BPF_OPERAND_IMM32 :
 814       value = fields->f_imm32;
 815       break;
 816     case BPF_OPERAND_IMM64 :
 817       value = fields->f_imm64;
 818       break;
 819     case BPF_OPERAND_OFFSET16 :
 820       value = fields->f_offset16;
 821       break;
 822     case BPF_OPERAND_SRCBE :
 823       value = fields->f_srcbe;
 824       break;
 825     case BPF_OPERAND_SRCLE :
 826       value = fields->f_srcle;
 827       break;
 828
 829     default :
 830       /* xgettext:c-format */
 831       opcodes_error_handler
 832         (_("internal error: unrecognized field %d while getting vma operand"),
 833          opindex);
 834       abort ();
 835   }
 836
 837   return value;
 838 }
 839
 840 void bpf_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
 841 void bpf_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
 842
 843 /* Stuffing values in cgen_fields is handled by a collection of functions.
 844    They are distinguished by the type of the VALUE argument they accept.
 845    TODO: floating point, inlining support, remove cases where argument type
 846    not appropriate.  */
 847
 848 void
 849 bpf_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 850                              int opindex,
 851                              CGEN_FIELDS * fields,
 852                              int value)
 853 {
 854   switch (opindex)
 855     {
 856     case BPF_OPERAND_DISP16 :
 857       fields->f_offset16 = value;
 858       break;
 859     case BPF_OPERAND_DISP32 :
 860       fields->f_imm32 = value;
 861       break;
 862     case BPF_OPERAND_DSTBE :
 863       fields->f_dstbe = value;
 864       break;
 865     case BPF_OPERAND_DSTLE :
 866       fields->f_dstle = value;
 867       break;
 868     case BPF_OPERAND_ENDSIZE :
 869       fields->f_imm32 = value;
 870       break;
 871     case BPF_OPERAND_IMM32 :
 872       fields->f_imm32 = value;
 873       break;
 874     case BPF_OPERAND_IMM64 :
 875       fields->f_imm64 = value;
 876       break;
 877     case BPF_OPERAND_OFFSET16 :
 878       fields->f_offset16 = value;
 879       break;
 880     case BPF_OPERAND_SRCBE :
 881       fields->f_srcbe = value;
 882       break;
 883     case BPF_OPERAND_SRCLE :
 884       fields->f_srcle = value;
 885       break;
 886
 887     default :
 888       /* xgettext:c-format */
 889       opcodes_error_handler
 890         (_("internal error: unrecognized field %d while setting int operand"),
 891          opindex);
 892       abort ();
 893   }
 894 }
 895
 896 void
 897 bpf_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
 898                              int opindex,
 899                              CGEN_FIELDS * fields,
 900                              bfd_vma value)
 901 {
 902   switch (opindex)
 903     {
 904     case BPF_OPERAND_DISP16 :
 905       fields->f_offset16 = value;
 906       break;
 907     case BPF_OPERAND_DISP32 :
 908       fields->f_imm32 = value;
 909       break;
 910     case BPF_OPERAND_DSTBE :
 911       fields->f_dstbe = value;
 912       break;
 913     case BPF_OPERAND_DSTLE :
 914       fields->f_dstle = value;
 915       break;
 916     case BPF_OPERAND_ENDSIZE :
 917       fields->f_imm32 = value;
 918       break;
 919     case BPF_OPERAND_IMM32 :
 920       fields->f_imm32 = value;
 921       break;
 922     case BPF_OPERAND_IMM64 :
 923       fields->f_imm64 = value;
 924       break;
 925     case BPF_OPERAND_OFFSET16 :
 926       fields->f_offset16 = value;
 927       break;
 928     case BPF_OPERAND_SRCBE :
 929       fields->f_srcbe = value;
 930       break;
 931     case BPF_OPERAND_SRCLE :
 932       fields->f_srcle = value;
 933       break;
 934
 935     default :
 936       /* xgettext:c-format */
 937       opcodes_error_handler
 938         (_("internal error: unrecognized field %d while setting vma operand"),
 939          opindex);
 940       abort ();
 941   }
 942 }
 943
 944 /* Function to call before using the instruction builder tables.  */
 945
 946 void
 947 bpf_cgen_init_ibld_table (CGEN_CPU_DESC cd)
 948 {
 949   cd->insert_handlers = & bpf_cgen_insert_handlers[0];
 950   cd->extract_handlers = & bpf_cgen_extract_handlers[0];
 951
 952   cd->insert_operand = bpf_cgen_insert_operand;
 953   cd->extract_operand = bpf_cgen_extract_operand;
 954
 955   cd->get_int_operand = bpf_cgen_get_int_operand;
 956   cd->set_int_operand = bpf_cgen_set_int_operand;
 957   cd->get_vma_operand = bpf_cgen_get_vma_operand;
 958   cd->set_vma_operand = bpf_cgen_set_vma_operand;
 959 }