gcc/config/cris/aout.h

   1 /* Definitions for GCC.  Part of the machine description for CRIS.
   2    Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
   3    Contributed by Axis Communications.  Written by Hans-Peter Nilsson.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* After the first "Node:" comment comes all preprocessor directives and
  23    attached declarations described in the info files, the "Using and
  24    Porting GCC" manual (uapgcc), in the same order as found in the "Target
  25    macros" section in the gcc-2.9x CVS edition of 2000-03-17.  FIXME: Not
  26    really, but needs an update anyway.
  27
  28    There is no generic copy-of-uapgcc comment, you'll have to see uapgcc
  29    for that.  If applicable, there is a CRIS-specific comment.  The order
  30    of macro definitions follow the order in the manual.  Every section in
  31    the manual (node in the info pages) has an introductory `Node:
  32    <subchapter>' comment.  If no macros are defined for a section, only
  33    the section-comment is present.  */
  34
  35 /* This file defines the macros for a.out that are not covered by cris.h.
  36    Many macros are copied from elfos.h and should be in some generic
  37    config/gas-aout.h.  */
  38
  39 /* Node: Driver */
  40
  41 #undef STARTFILE_SPEC
  42 #define STARTFILE_SPEC \
  43  "%{melinux:crt0.o%s}\
  44   %{!melinux:\
  45    %{sim2:s2crt0.o%s}\
  46    %{!sim2:\
  47     %{sim:scrt0.o%s}\
  48     %{!sim:%{pg:gcrt0.o%s}\
  49      %{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}}"
  50
  51 /* Which library to get.  The only difference from the default is to get
  52    libsc.a if -sim is given to the driver.  Repeat -lc -lsysX
  53    {X=sim,linux}, because libsysX needs (at least) errno from libc, and
  54    then we want to resolve new unknowns in libc against libsysX, not
  55    libnosys.  Assume everything is in libc for -mlinux.  */
  56 #undef LIB_SPEC
  57 #define LIB_SPEC \
  58  "%{melinux:-lc -lsyslinux -lc -lsyslinux -lic}\
  59   %{!melinux:\
  60    %{sim*:-lc -lsyssim -lc -lsyssim}\
  61    %{!sim*:%{g*:-lg}\
  62      %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\
  63    -lnosys}"
  64
  65 #undef CRIS_CPP_SUBTARGET_SPEC
  66 #define CRIS_CPP_SUBTARGET_SPEC \
  67  "-D__AOUT__\
  68   %{melinux:-D__gnu_linux__ -D__linux__ -D__unix__ -D__elinux__ -D__uclinux__\
  69     %{!nostdinc:\
  70       %{!mbest-lib-options:%{isystem*}}\
  71       -isystem elinux/include%s\
  72       %{mbest-lib-options:%{isystem*}}}\
  73     %{!ansi:%{!std=*:%{!undef:-Dlinux -Dunix -Delinux -Duclinux}}}}\
  74   %{mbest-lib-options:\
  75    %{!moverride-best-lib-options:\
  76     %{!march=*:%{!metrax*:%{!mcpu=*:-D__tune_v8 -D__CRIS_arch_tune=8}}}}}"
  77
  78 #undef CRIS_CC1_SUBTARGET_SPEC
  79 #define CRIS_CC1_SUBTARGET_SPEC \
  80  "%{mbest-lib-options:\
  81    %{!moverride-best-lib-options:\
  82     %{!march=*:%{!mcpu=*:-mtune=v8}}}}"
  83
  84 #undef CRIS_ASM_SUBTARGET_SPEC
  85 #define CRIS_ASM_SUBTARGET_SPEC "--em=crisaout"
  86
  87 #undef CRIS_LINK_SUBTARGET_SPEC
  88 #define CRIS_LINK_SUBTARGET_SPEC \
  89  "-mcrisaout\
  90   %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\
  91   %{melinux:-Ur -d\
  92    %{!shlib:%{!symbolic:-Bstatic}}\
  93    %{shlib:-Bdynamic}\
  94    %{symbolic:-Bdynamic}\
  95    %{static:-Bstatic}}\
  96   %{melinux-stacksize=*:-defsym __Stacksize=%*}"
  97
  98 #undef CRIS_SUBTARGET_SWITCHES
  99 #define CRIS_SUBTARGET_SWITCHES                                         \
 100   {"elinux", (TARGET_MASK_SVINTO                                        \
 101               + TARGET_MASK_STACK_ALIGN                                 \
 102               + TARGET_MASK_CONST_ALIGN                                 \
 103               + TARGET_MASK_DATA_ALIGN                                  \
 104               + TARGET_MASK_ETRAX4_ADD                                  \
 105               + TARGET_MASK_ALIGN_BY_32),                               \
 106    N_("Compile for the MMU-less Etrax 100-based elinux system")},       \
 107   /* Legacy option.  */                                                 \
 108   {"aout",   0, ""},
 109
 110 #undef CRIS_SUBTARGET_LONG_OPTIONS
 111 #define CRIS_SUBTARGET_LONG_OPTIONS \
 112   {"elinux-stacksize=", &cris_elinux_stacksize_str,                     \
 113    N_("For elinux, request a specified stack-size for this program")},  \
 114
 115 #undef CRIS_SUBTARGET_VERSION
 116 #define CRIS_SUBTARGET_VERSION " - a.out"
 117
 118 #undef CRIS_SUBTARGET_DEFAULT
 119 #define CRIS_SUBTARGET_DEFAULT 0
 120
 121 /* Node: Storage Layout */
 122
 123 /* We can align to 16 bits (only) with CRIS a.out.  */
 124 #define MAX_OFILE_ALIGNMENT 16
 125
 126
 127 /* Node: Library Calls */
 128
 129 #define TARGET_MEM_FUNCTIONS
 130
 131
 132 /* Node: Data Output */
 133
 134 #define ESCAPES \
 135 "\1\1\1\1\1\1\1\1btn\1fr\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 136 \0\0\"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
 137 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\\\0\0\0\
 138 \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\1\
 139 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 140 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 141 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\
 142 \1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1"
 143
 144 /* Some svr4 assemblers have a limit on the number of characters which
 145    can appear in the operand of a .string directive.  If your assembler
 146    has such a limitation, you should define STRING_LIMIT to reflect that
 147    limit.  Note that at least some svr4 assemblers have a limit on the
 148    actual number of bytes in the double-quoted string, and that they
 149    count each character in an escape sequence as one byte.  Thus, an
 150    escape sequence like \377 would count as four bytes.
 151
 152    If your target assembler doesn't support the .string directive, you
 153    should define this to zero.  */
 154
 155 #define STRING_LIMIT    ((unsigned) 256)
 156
 157 #define STRING_ASM_OP   "\t.string\t"
 158 #define ASCII_DATA_ASM_OP       "\t.ascii\t"
 159 #define TYPE_ASM_OP     "\t.type\t"
 160 #define SIZE_ASM_OP     "\t.size\t"
 161 #define TYPE_OPERAND_FMT        "@%s"
 162
 163 /* The routine used to output NUL terminated strings.  We use a special
 164    version of this for most svr4 targets because doing so makes the
 165    generated assembly code more compact (and thus faster to assemble)
 166    as well as more readable, especially for targets like the i386
 167    (where the only alternative is to output character sequences as
 168    comma separated lists of numbers).  */
 169
 170 #define ASM_OUTPUT_LIMITED_STRING(FILE, STR)            \
 171   do                                                    \
 172     {                                                   \
 173       register const unsigned char *_limited_str =      \
 174         (const unsigned char *) (STR);                  \
 175       register unsigned ch;                             \
 176                                                         \
 177       fprintf ((FILE), "%s\"", STRING_ASM_OP);          \
 178                                                         \
 179       for (; (ch = *_limited_str); _limited_str++)      \
 180         {                                               \
 181           register int escape;                          \
 182                                                         \
 183           switch (escape = ESCAPES[ch])                 \
 184             {                                           \
 185             case 0:                                     \
 186               putc (ch, (FILE));                        \
 187               break;                                    \
 188             case 1:                                     \
 189               fprintf ((FILE), "\\%03o", ch);           \
 190               break;                                    \
 191             default:                                    \
 192               putc ('\\', (FILE));                      \
 193               putc (escape, (FILE));                    \
 194               break;                                    \
 195             }                                           \
 196         }                                               \
 197                                                         \
 198       fprintf ((FILE), "\"\n");                         \
 199     }                                                   \
 200   while (0)
 201
 202 /* The routine used to output sequences of byte values.  We use a special
 203    version of this for most svr4 targets because doing so makes the
 204    generated assembly code more compact (and thus faster to assemble)
 205    as well as more readable.  Note that if we find subparts of the
 206    character sequence which end with NUL (and which are shorter than
 207    STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING.  */
 208
 209 #undef  ASM_OUTPUT_ASCII
 210 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                             \
 211   do                                                                    \
 212     {                                                                   \
 213       register const unsigned char *_ascii_bytes =                      \
 214         (const unsigned char *) (STR);                                  \
 215       register const unsigned char *limit = _ascii_bytes + (LENGTH);    \
 216       register unsigned bytes_in_chunk = 0;                             \
 217                                                                         \
 218       for (; _ascii_bytes < limit; _ascii_bytes++)                      \
 219         {                                                               \
 220           register const unsigned char *p;                              \
 221                                                                         \
 222           if (bytes_in_chunk >= 60)                                     \
 223             {                                                           \
 224               fprintf ((FILE), "\"\n");                                 \
 225               bytes_in_chunk = 0;                                       \
 226             }                                                           \
 227                                                                         \
 228           for (p = _ascii_bytes; p < limit && *p != '\0'; p++)          \
 229             continue;                                                   \
 230                                                                         \
 231           if (p < limit && (p - _ascii_bytes) <= (long)STRING_LIMIT)    \
 232             {                                                           \
 233               if (bytes_in_chunk > 0)                                   \
 234                 {                                                       \
 235                   fprintf ((FILE), "\"\n");                             \
 236                   bytes_in_chunk = 0;                                   \
 237                 }                                                       \
 238                                                                         \
 239               ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes);         \
 240               _ascii_bytes = p;                                         \
 241             }                                                           \
 242           else                                                          \
 243             {                                                           \
 244               register int escape;                                      \
 245               register unsigned ch;                                     \
 246                                                                         \
 247               if (bytes_in_chunk == 0)                                  \
 248                 fprintf ((FILE), "%s\"", ASCII_DATA_ASM_OP);            \
 249                                                                         \
 250               switch (escape = ESCAPES[ch = *_ascii_bytes])             \
 251                 {                                                       \
 252                 case 0:                                                 \
 253                   putc (ch, (FILE));                                    \
 254                   bytes_in_chunk++;                                     \
 255                   break;                                                \
 256                 case 1:                                                 \
 257                   fprintf ((FILE), "\\%03o", ch);                       \
 258                   bytes_in_chunk += 4;                                  \
 259                   break;                                                \
 260                 default:                                                \
 261                   putc ('\\', (FILE));                                  \
 262                   putc (escape, (FILE));                                \
 263                   bytes_in_chunk += 2;                                  \
 264                   break;                                                \
 265                 }                                                       \
 266             }                                                           \
 267         }                                                               \
 268                                                                         \
 269       if (bytes_in_chunk > 0)                                           \
 270         fprintf ((FILE), "\"\n");                                       \
 271     }                                                                   \
 272   while (0)
 273
 274
 275 /* Node: Label Output */
 276
 277 #define SET_ASM_OP      "\t.set\t"
 278
 279 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)  \
 280   (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0))
 281
 282 #define ASM_WEAKEN_LABEL(FILE, NAME)    \
 283   do                                    \
 284     {                                   \
 285       fputs ("\t.weak\t", (FILE));      \
 286       assemble_name ((FILE), (NAME));   \
 287       fputc ('\n', (FILE));             \
 288     }                                   \
 289   while (0)
 290
 291 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
 292   do                                                            \
 293     {                                                           \
 294       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");       \
 295       ASM_OUTPUT_LABEL(FILE, NAME);                             \
 296     }                                                           \
 297   while (0)
 298
 299 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
 300   do                                                            \
 301     {                                                           \
 302       HOST_WIDE_INT size;                                       \
 303                                                                 \
 304       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");         \
 305                                                                 \
 306       size_directive_output = 0;                                \
 307       if (!flag_inhibit_size_directive                          \
 308           && (DECL) && DECL_SIZE (DECL))                        \
 309         {                                                       \
 310           size_directive_output = 1;                            \
 311           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 312           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 313         }                                                       \
 314                                                                 \
 315       ASM_OUTPUT_LABEL (FILE, NAME);                            \
 316     }                                                           \
 317   while (0)
 318
 319 #undef ASM_FINISH_DECLARE_OBJECT
 320 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)\
 321   do                                                            \
 322     {                                                           \
 323       const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);   \
 324       HOST_WIDE_INT size;                                       \
 325                                                                 \
 326       if (!flag_inhibit_size_directive                          \
 327           && DECL_SIZE (DECL)                                   \
 328           && ! AT_END && TOP_LEVEL                              \
 329           && DECL_INITIAL (DECL) == error_mark_node             \
 330           && !size_directive_output)                            \
 331         {                                                       \
 332           size_directive_output = 1;                            \
 333           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 334           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);         \
 335         }                                                       \
 336     }                                                           \
 337   while (0)
 338
 339 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL)            \
 340   do                                                            \
 341     {                                                           \
 342       if (!flag_inhibit_size_directive)                         \
 343         ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME);                 \
 344     }                                                           \
 345   while (0)
 346
 347 /* The configure machinery invokes the assembler without options, which is
 348    not how gcc invokes it.  Without options, the multi-target assembler
 349    will probably be found, which is ELF by default.  To counter that, we
 350    need to override ELF auto-host.h config stuff which we know collides
 351    with a.out.  */
 352 #undef HAVE_GAS_HIDDEN
 353
 354
 355 /* Node: Alignment Output */
 356
 357 #define SKIP_ASM_OP     "\t.zero\t"
 358
 359 #undef  ASM_OUTPUT_SKIP
 360 #define ASM_OUTPUT_SKIP(FILE, SIZE) \
 361   fprintf (FILE, "%s%u\n", SKIP_ASM_OP, (SIZE))
 362
 363 /* Node: All Debuggers */
 364
 365 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 366
 367
 368 /* Node: Misc */
 369
 370 #define HANDLE_SYSV_PRAGMA 1
 371
 372 /* In theory, this one isn't necessary, but over time, external tools have
 373    been primed on names with "." rather than "$".  */
 374 #define NO_DOLLAR_IN_LABEL
 375
 376 /* These are undocumented, but to keep a single
 377    CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON, we set this to an asm that will
 378    emit an error if ever output.  It will not be emitted for a.out modulo
 379    careless hacking.  */
 380 #define COMMON_ASM_OP   "\t.err\t"
 381 #define LOCAL_ASM_OP    "\t.err\t"
 382
 383 #if defined(__CRIS__) && defined (__AOUT__) && defined (IN_GCC)
 384
 385 #define CRIS_ABI_VERSION_SYMBOL_STRING ".$CRIS_ABI_V2"
 386
 387 /* Make all a.out library functions have undefined references to the
 388    .$CRIS_ABI_V2 symbol, so it will be picked up.  Used by GDB.  GDB has
 389    a bug with reading a.out symbols; it does not see the GNU weak
 390    extensions, so we can't have .$CRIS_ABI_V2 weak.  Weak.  */
 391 __asm__ (".set .$abi_referer," CRIS_ABI_VERSION_SYMBOL_STRING);
 392 #endif
 393
 394 /*
 395  * Local variables:
 396  * eval: (c-set-style "gnu")
 397  * indent-tabs-mode: t
 398  * End:
 399  */