bfd/cpu-sh.c

   1 /* BFD library support routines for the Renesas / SuperH SH architecture.
   2    Copyright 1993, 1994, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
   3    2007 Free Software Foundation, Inc.
   4    Hacked by Steve Chamberlain of Cygnus Support.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #include "sysdep.h"
  24 #include "bfd.h"
  25 #include "libbfd.h"
  26 #include "../opcodes/sh-opc.h"
  27
  28 #define SH_NEXT                            arch_info_struct + 0
  29 #define SH2_NEXT                           arch_info_struct + 1
  30 #define SH2E_NEXT                          arch_info_struct + 2
  31 #define SH_DSP_NEXT                        arch_info_struct + 3
  32 #define SH3_NEXT                           arch_info_struct + 4
  33 #define SH3_NOMMU_NEXT                     arch_info_struct + 5
  34 #define SH3_DSP_NEXT                       arch_info_struct + 6
  35 #define SH3E_NEXT                          arch_info_struct + 7
  36 #define SH4_NEXT                           arch_info_struct + 8
  37 #define SH4A_NEXT                          arch_info_struct + 9
  38 #define SH4AL_DSP_NEXT                     arch_info_struct + 10
  39 #define SH4_NOFPU_NEXT                     arch_info_struct + 11
  40 #define SH4_NOMMU_NOFPU_NEXT               arch_info_struct + 12
  41 #define SH4A_NOFPU_NEXT                    arch_info_struct + 13
  42 #define SH2A_NEXT                          arch_info_struct + 14
  43 #define SH2A_NOFPU_NEXT                    arch_info_struct + 15
  44 #define SH2A_NOFPU_OR_SH4_NOMMU_NOFPU_NEXT arch_info_struct + 16
  45 #define SH2A_NOFPU_OR_SH3_NOMMU_NEXT       arch_info_struct + 17
  46 #define SH2A_OR_SH4_NEXT                   arch_info_struct + 18
  47 #define SH2A_OR_SH3E_NEXT                  arch_info_struct + 19
  48 #define SH64_NEXT                          NULL
  49
  50 static const bfd_arch_info_type arch_info_struct[] =
  51 {
  52   {
  53     32,                         /* 32 bits in a word.  */
  54     32,                         /* 32 bits in an address.  */
  55     8,                          /* 8 bits in a byte.  */
  56     bfd_arch_sh,
  57     bfd_mach_sh2,
  58     "sh",                       /* Architecture name.  */
  59     "sh2",                      /* Machine name.  */
  60     1,
  61     FALSE,                      /* Not the default.  */
  62     bfd_default_compatible,
  63     bfd_default_scan,
  64     bfd_arch_default_fill,
  65     SH2_NEXT
  66   },
  67   {
  68     32,                         /* 32 bits in a word.  */
  69     32,                         /* 32 bits in an address.  */
  70     8,                          /* 8 bits in a byte.  */
  71     bfd_arch_sh,
  72     bfd_mach_sh2e,
  73     "sh",                       /* Architecture name.  */
  74     "sh2e",                     /* Machine name.  */
  75     1,
  76     FALSE,                      /* Not the default.  */
  77     bfd_default_compatible,
  78     bfd_default_scan,
  79     bfd_arch_default_fill,
  80     SH2E_NEXT
  81   },
  82   {
  83     32,                         /* 32 bits in a word.  */
  84     32,                         /* 32 bits in an address.  */
  85     8,                          /* 8 bits in a byte.  */
  86     bfd_arch_sh,
  87     bfd_mach_sh_dsp,
  88     "sh",                       /* Architecture name.   */
  89     "sh-dsp",                   /* Machine name.  */
  90     1,
  91     FALSE,                      /* Not the default.  */
  92     bfd_default_compatible,
  93     bfd_default_scan,
  94     bfd_arch_default_fill,
  95     SH_DSP_NEXT
  96   },
  97   {
  98     32,                         /* 32 bits in a word.  */
  99     32,                         /* 32 bits in an address.  */
 100     8,                          /* 8 bits in a byte.  */
 101     bfd_arch_sh,
 102     bfd_mach_sh3,
 103     "sh",                       /* Architecture name.   */
 104     "sh3",                      /* Machine name.  */
 105     1,
 106     FALSE,                      /* Not the default.  */
 107     bfd_default_compatible,
 108     bfd_default_scan,
 109     bfd_arch_default_fill,
 110     SH3_NEXT
 111   },
 112   {
 113     32,                         /* 32 bits in a word.  */
 114     32,                         /* 32 bits in an address.  */
 115     8,                          /* 8 bits in a byte.  */
 116     bfd_arch_sh,
 117     bfd_mach_sh3_nommu,
 118     "sh",                       /* Architecture name.   */
 119     "sh3-nommu",                /* Machine name.  */
 120     1,
 121     FALSE,                      /* Not the default.  */
 122     bfd_default_compatible,
 123     bfd_default_scan,
 124     bfd_arch_default_fill,
 125     SH3_NOMMU_NEXT
 126   },
 127   {
 128     32,                         /* 32 bits in a word.  */
 129     32,                         /* 32 bits in an address.  */
 130     8,                          /* 8 bits in a byte.  */
 131     bfd_arch_sh,
 132     bfd_mach_sh3_dsp,
 133     "sh",                       /* Architecture name.   */
 134     "sh3-dsp",                  /* Machine name.  */
 135     1,
 136     FALSE,                      /* Not the default.  */
 137     bfd_default_compatible,
 138     bfd_default_scan,
 139     bfd_arch_default_fill,
 140     SH3_DSP_NEXT
 141   },
 142   {
 143     32,                         /* 32 bits in a word.  */
 144     32,                         /* 32 bits in an address.  */
 145     8,                          /* 8 bits in a byte.  */
 146     bfd_arch_sh,
 147     bfd_mach_sh3e,
 148     "sh",                       /* Architecture name.   */
 149     "sh3e",                     /* Machine name.  */
 150     1,
 151     FALSE,                      /* Not the default.  */
 152     bfd_default_compatible,
 153     bfd_default_scan,
 154     bfd_arch_default_fill,
 155     SH3E_NEXT
 156   },
 157   {
 158     32,                         /* 32 bits in a word.  */
 159     32,                         /* 32 bits in an address.  */
 160     8,                          /* 8 bits in a byte.  */
 161     bfd_arch_sh,
 162     bfd_mach_sh4,
 163     "sh",                       /* Architecture name.   */
 164     "sh4",                      /* Machine name.  */
 165     1,
 166     FALSE,                      /* Not the default.  */
 167     bfd_default_compatible,
 168     bfd_default_scan,
 169     bfd_arch_default_fill,
 170     SH4_NEXT
 171   },
 172   {
 173     32,                         /* 32 bits in a word.  */
 174     32,                         /* 32 bits in an address.  */
 175     8,                          /* 8 bits in a byte.  */
 176     bfd_arch_sh,
 177     bfd_mach_sh4a,
 178     "sh",                       /* Architecture name.   */
 179     "sh4a",                     /* Machine name.  */
 180     1,
 181     FALSE,                      /* Not the default.  */
 182     bfd_default_compatible,
 183     bfd_default_scan,
 184     bfd_arch_default_fill,
 185     SH4A_NEXT
 186   },
 187   {
 188     32,                         /* 32 bits in a word.  */
 189     32,                         /* 32 bits in an address.  */
 190     8,                          /* 8 bits in a byte.  */
 191     bfd_arch_sh,
 192     bfd_mach_sh4al_dsp,
 193     "sh",                       /* Architecture name.   */
 194     "sh4al-dsp",                /* Machine name.  */
 195     1,
 196     FALSE,                      /* Not the default.  */
 197     bfd_default_compatible,
 198     bfd_default_scan,
 199     bfd_arch_default_fill,
 200     SH4AL_DSP_NEXT
 201   },
 202   {
 203     32,                         /* 32 bits in a word.  */
 204     32,                         /* 32 bits in an address.  */
 205     8,                          /* 8 bits in a byte.  */
 206     bfd_arch_sh,
 207     bfd_mach_sh4_nofpu,
 208     "sh",                       /* Architecture name.   */
 209     "sh4-nofpu",                /* Machine name.  */
 210     1,
 211     FALSE,                      /* Not the default.  */
 212     bfd_default_compatible,
 213     bfd_default_scan,
 214     bfd_arch_default_fill,
 215     SH4_NOFPU_NEXT
 216   },
 217   {
 218     32,                         /* 32 bits in a word.  */
 219     32,                         /* 32 bits in an address.  */
 220     8,                          /* 8 bits in a byte.  */
 221     bfd_arch_sh,
 222     bfd_mach_sh4_nommu_nofpu,
 223     "sh",                       /* Architecture name.   */
 224     "sh4-nommu-nofpu",          /* Machine name.  */
 225     1,
 226     FALSE,                      /* Not the default.  */
 227     bfd_default_compatible,
 228     bfd_default_scan,
 229     bfd_arch_default_fill,
 230     SH4_NOMMU_NOFPU_NEXT
 231   },
 232   {
 233     32,                         /* 32 bits in a word.  */
 234     32,                         /* 32 bits in an address.  */
 235     8,                          /* 8 bits in a byte.  */
 236     bfd_arch_sh,
 237     bfd_mach_sh4a_nofpu,
 238     "sh",                       /* Architecture name.   */
 239     "sh4a-nofpu",               /* Machine name.  */
 240     1,
 241     FALSE,                      /* Not the default.  */
 242     bfd_default_compatible,
 243     bfd_default_scan,
 244     bfd_arch_default_fill,
 245     SH4A_NOFPU_NEXT
 246   },
 247   {
 248     32,                         /* 32 bits in a word.  */
 249     32,                         /* 32 bits in an address.  */
 250     8,                          /* 8 bits in a byte.  */
 251     bfd_arch_sh,
 252     bfd_mach_sh2a,
 253     "sh",                       /* Architecture name.  */
 254     "sh2a",                     /* Machine name.  */
 255     1,
 256     FALSE,                      /* Not the default.  */
 257     bfd_default_compatible,
 258     bfd_default_scan,
 259     bfd_arch_default_fill,
 260     SH2A_NEXT
 261   },
 262   {
 263     32,                         /* 32 bits in a word.  */
 264     32,                         /* 32 bits in an address.  */
 265     8,                          /* 8 bits in a byte.  */
 266     bfd_arch_sh,
 267     bfd_mach_sh2a_nofpu,
 268     "sh",                       /* Architecture name.  */
 269     "sh2a-nofpu",               /* Machine name.  */
 270     1,
 271     FALSE,                      /* Not the default.  */
 272     bfd_default_compatible,
 273     bfd_default_scan,
 274     bfd_arch_default_fill,
 275     SH2A_NOFPU_NEXT
 276   },
 277   {
 278     32,                         /* 32 bits in a word.  */
 279     32,                         /* 32 bits in an address.  */
 280     8,                          /* 8 bits in a byte.  */
 281     bfd_arch_sh,
 282     bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu,
 283     "sh",                       /* Architecture name.  */
 284     "sh2a-nofpu-or-sh4-nommu-nofpu",            /* Machine name.  */
 285     1,
 286     FALSE,                      /* Not the default.  */
 287     bfd_default_compatible,
 288     bfd_default_scan,
 289     bfd_arch_default_fill,
 290     SH2A_NOFPU_OR_SH4_NOMMU_NOFPU_NEXT
 291   },
 292   {
 293     32,                         /* 32 bits in a word.  */
 294     32,                         /* 32 bits in an address.  */
 295     8,                          /* 8 bits in a byte.  */
 296     bfd_arch_sh,
 297     bfd_mach_sh2a_nofpu_or_sh3_nommu,
 298     "sh",                       /* Architecture name. .  */
 299     "sh2a-nofpu-or-sh3-nommu",  /* Machine name.  */
 300     1,
 301     FALSE,                      /* Not the default.  */
 302     bfd_default_compatible,
 303     bfd_default_scan,
 304     bfd_arch_default_fill,
 305     SH2A_NOFPU_OR_SH3_NOMMU_NEXT
 306   },
 307   {
 308     32,                         /* 32 bits in a word.  */
 309     32,                         /* 32 bits in an address.  */
 310     8,                          /* 8 bits in a byte.  */
 311     bfd_arch_sh,
 312     bfd_mach_sh2a_or_sh4,
 313     "sh",                       /* Architecture name.  */
 314     "sh2a-or-sh4",              /* Machine name.  */
 315     1,
 316     FALSE,                      /* Not the default.  */
 317     bfd_default_compatible,
 318     bfd_default_scan,
 319     bfd_arch_default_fill,
 320     SH2A_OR_SH4_NEXT
 321   },
 322   {
 323     32,                         /* 32 bits in a word.  */
 324     32,                         /* 32 bits in an address.  */
 325     8,                          /* 8 bits in a byte.  */
 326     bfd_arch_sh,
 327     bfd_mach_sh2a_or_sh3e,
 328     "sh",                       /* Architecture name.  */
 329     "sh2a-or-sh3e",             /* Machine name.  */
 330     1,
 331     FALSE,                      /* Not the default.  */
 332     bfd_default_compatible,
 333     bfd_default_scan,
 334     bfd_arch_default_fill,
 335     SH2A_OR_SH3E_NEXT
 336   },
 337   {
 338     64,                         /* 64 bits in a word.  */
 339     64,                         /* 64 bits in an address.  */
 340     8,                          /* 8 bits in a byte.  */
 341     bfd_arch_sh,
 342     bfd_mach_sh5,
 343     "sh",                       /* Architecture name.   */
 344     "sh5",                      /* Machine name.  */
 345     1,
 346     FALSE,                      /* Not the default.  */
 347     bfd_default_compatible,
 348     bfd_default_scan,
 349     bfd_arch_default_fill,
 350     SH64_NEXT
 351   },
 352 };
 353
 354 const bfd_arch_info_type bfd_sh_arch =
 355 {
 356   32,                           /* 32 bits in a word.  */
 357   32,                           /* 32 bits in an address.  */
 358   8,                            /* 8 bits in a byte.  */
 359   bfd_arch_sh,
 360   bfd_mach_sh,
 361   "sh",                         /* Architecture name.   */
 362   "sh",                         /* Machine name.  */
 363   1,
 364   TRUE,                         /* The default machine.  */
 365   bfd_default_compatible,
 366   bfd_default_scan,
 367   bfd_arch_default_fill,
 368   SH_NEXT
 369 };
 370
 371
 372 /* This table defines the mappings from the BFD internal numbering
 373    system to the opcodes internal flags system.
 374    It is used by the functions defined below.
 375    The prototypes for these SH specific functions are found in
 376    sh-opc.h .  */
 377
 378 static struct { unsigned long bfd_mach, arch, arch_up; } bfd_to_arch_table[] =
 379 {
 380   { bfd_mach_sh,              arch_sh1,             arch_sh_up },
 381   { bfd_mach_sh2,             arch_sh2,             arch_sh2_up },
 382   { bfd_mach_sh2e,            arch_sh2e,            arch_sh2e_up },
 383   { bfd_mach_sh_dsp,          arch_sh_dsp,          arch_sh_dsp_up },
 384   { bfd_mach_sh2a,            arch_sh2a,            arch_sh2a_up },
 385   { bfd_mach_sh2a_nofpu,      arch_sh2a_nofpu,      arch_sh2a_nofpu_up },
 386
 387   { bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu,         arch_sh2a_nofpu_or_sh4_nommu_nofpu,   arch_sh2a_nofpu_or_sh4_nommu_nofpu_up },
 388   { bfd_mach_sh2a_nofpu_or_sh3_nommu,               arch_sh2a_nofpu_or_sh3_nommu,         arch_sh2a_nofpu_or_sh3_nommu_up },
 389   { bfd_mach_sh2a_or_sh4,     arch_sh2a_or_sh4,     arch_sh2a_or_sh4_up },
 390   { bfd_mach_sh2a_or_sh3e,    arch_sh2a_or_sh3e,    arch_sh2a_or_sh3e_up },
 391
 392   { bfd_mach_sh3,             arch_sh3,             arch_sh3_up },
 393   { bfd_mach_sh3_nommu,       arch_sh3_nommu,       arch_sh3_nommu_up },
 394   { bfd_mach_sh3_dsp,         arch_sh3_dsp,         arch_sh3_dsp_up },
 395   { bfd_mach_sh3e,            arch_sh3e,            arch_sh3e_up },
 396   { bfd_mach_sh4,             arch_sh4,             arch_sh4_up },
 397   { bfd_mach_sh4a,            arch_sh4a,            arch_sh4a_up },
 398   { bfd_mach_sh4al_dsp,       arch_sh4al_dsp,       arch_sh4al_dsp_up },
 399   { bfd_mach_sh4_nofpu,       arch_sh4_nofpu,       arch_sh4_nofpu_up },
 400   { bfd_mach_sh4_nommu_nofpu, arch_sh4_nommu_nofpu, arch_sh4_nommu_nofpu_up },
 401   { bfd_mach_sh4a_nofpu,      arch_sh4a_nofpu,      arch_sh4a_nofpu_up },
 402   { 0, 0, 0 }   /* Terminator.  */
 403 };
 404
 405
 406 /* Convert a BFD mach number into the right opcodes arch flags
 407    using the table above.  */
 408
 409 unsigned int
 410 sh_get_arch_from_bfd_mach (unsigned long mach)
 411 {
 412   int i = 0;
 413
 414   while (bfd_to_arch_table[i].bfd_mach != 0)
 415     if (bfd_to_arch_table[i].bfd_mach == mach)
 416       return bfd_to_arch_table[i].arch;
 417     else
 418       i++;
 419
 420   /* Machine not found.   */
 421   BFD_FAIL();
 422
 423   return SH_ARCH_UNKNOWN_ARCH;
 424 }
 425
 426
 427 /* Convert a BFD mach number into a set of opcodes arch flags
 428    describing all the compatible architectures (i.e. arch_up)
 429    using the table above.  */
 430
 431 unsigned int
 432 sh_get_arch_up_from_bfd_mach (unsigned long mach)
 433 {
 434   int i = 0;
 435
 436   while (bfd_to_arch_table[i].bfd_mach != 0)
 437     if (bfd_to_arch_table[i].bfd_mach == mach)
 438       return bfd_to_arch_table[i].arch_up;
 439     else
 440       i++;
 441
 442   /* Machine not found.  */
 443   BFD_FAIL();
 444
 445   return SH_ARCH_UNKNOWN_ARCH;
 446 }
 447
 448
 449 /* Convert an arbitary arch_set - not necessarily corresponding
 450    directly to anything in the table above - to the most generic
 451    architecture which supports all the required features, and
 452    return the corresponding BFD mach.  */
 453
 454 unsigned long
 455 sh_get_bfd_mach_from_arch_set (unsigned int arch_set)
 456 {
 457   unsigned long result = 0;
 458   unsigned int best = ~arch_set;
 459   unsigned int co_mask = ~0;
 460   int i = 0;
 461
 462   /* If arch_set permits variants with no coprocessor then do not allow
 463      the other irrelevant co-processor bits to influence the choice:
 464        e.g. if dsp is disallowed by arch_set, then the algorithm would
 465        prefer fpu variants over nofpu variants because they also disallow
 466        dsp - even though the nofpu would be the most correct choice.
 467      This assumes that EVERY fpu/dsp variant has a no-coprocessor
 468      counter-part, or their non-fpu/dsp instructions do not have the
 469      no co-processor bit set.  */
 470   if (arch_set & arch_sh_no_co)
 471     co_mask = ~(arch_sh_sp_fpu | arch_sh_dp_fpu | arch_sh_has_dsp);
 472
 473   while (bfd_to_arch_table[i].bfd_mach != 0)
 474     {
 475       unsigned int try = bfd_to_arch_table[i].arch_up & co_mask;
 476
 477       /* Conceptually: Find the architecture with the least number
 478          of extra features or, if they have the same number, then
 479          the greatest number of required features.  Disregard
 480          architectures where the required features alone do
 481          not describe a valid architecture.  */
 482       if (((try & ~arch_set) < (best & ~arch_set)
 483            || ((try & ~arch_set) == (best & ~arch_set)
 484                && (~try & arch_set) < (~best & arch_set)))
 485           && SH_MERGE_ARCH_SET_VALID (try, arch_set))
 486         {
 487           result = bfd_to_arch_table[i].bfd_mach;
 488           best = try;
 489         }
 490
 491       i++;
 492     }
 493
 494   /* This might happen if a new variant is added to sh-opc.h
 495      but no corresponding entry is added to the table above.  */
 496   BFD_ASSERT (result != 0);
 497
 498   return result;
 499 }
 500
 501
 502 /* Merge the architecture type of two BFD files, such that the
 503    resultant architecture supports all the features required
 504    by the two input BFDs.
 505    If the input BFDs are multually incompatible - i.e. one uses
 506    DSP while the other uses FPU - or there is no known architecture
 507    that fits the requirements then an error is emitted.  */
 508
 509 bfd_boolean
 510 sh_merge_bfd_arch (bfd *ibfd, bfd *obfd)
 511 {
 512   unsigned int old_arch, new_arch, merged_arch;
 513
 514   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
 515     return FALSE;
 516
 517   old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
 518   new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
 519
 520   merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
 521
 522   if (!SH_VALID_CO_ARCH_SET (merged_arch))
 523     {
 524       (*_bfd_error_handler)
 525         ("%B: uses %s instructions while previous modules use %s instructions",
 526          ibfd,
 527          SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
 528          SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
 529       bfd_set_error (bfd_error_bad_value);
 530       return FALSE;
 531     }
 532   else if (!SH_VALID_ARCH_SET (merged_arch))
 533     {
 534       (*_bfd_error_handler)
 535         ("internal error: merge of architecture '%s' with architecture '%s' produced unknown architecture\n",
 536          bfd_printable_name (obfd),
 537          bfd_printable_name (ibfd));
 538       bfd_set_error (bfd_error_bad_value);
 539       return FALSE;
 540     }
 541
 542   bfd_default_set_arch_mach (obfd, bfd_arch_sh,
 543                              sh_get_bfd_mach_from_arch_set (merged_arch));
 544
 545   return TRUE;
 546 }