gcc/config/arm/aof.h

   1 /* Definitions of target machine for GNU compiler, for Advanced RISC Machines
   2    ARM compilation, AOF Assembler.
   3    Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
   4    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk)
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC 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 2, or (at your option)
  11 any later version.
  12
  13 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 \f
  24
  25 #define AOF_ASSEMBLER
  26
  27 #define LINK_LIBGCC_SPECIAL 1
  28
  29 #define LINK_SPEC "%{aof} %{bin} %{aif} %{ihf} %{shl,*} %{reent*} %{split} \
  30                    %{ov*,*} %{reloc*} -nodebug"
  31
  32 #define STARTFILE_SPEC "crtbegin.o%s"
  33
  34 #define ENDFILE_SPEC "crtend.o%s"
  35
  36 #ifndef ASM_SPEC
  37 #define ASM_SPEC "%{g -g} -arch 4 \
  38 -apcs 3%{mapcs-32:/32bit}%{mapcs-26:/26bit}%{!mapcs-26:%{!macps-32:/26bit}}"
  39 #endif
  40
  41 #ifndef LIB_SPEC
  42 #define LIB_SPEC "%{Eb: armlib_h.32b%s}%{!Eb: armlib_h.32l%s}"
  43 #endif
  44
  45 #define LIBGCC_SPEC "libgcc.a%s"
  46
  47 /* Dividing the Output into Sections (Text, Data, ...) */
  48 /* AOF Assembler syntax is a nightmare when it comes to areas, since once
  49    we change from one area to another, we can't go back again.  Instead,
  50    we must create a new area with the same attributes and add the new output
  51    to that.  Unfortunately, there is nothing we can do here to guarantee that
  52    two areas with the same attributes will be linked adjacently in the
  53    resulting executable, so we have to be careful not to do pc-relative
  54    addressing across such boundaries.  */
  55 #define TEXT_SECTION_ASM_OP aof_text_section ()
  56
  57 #define SELECT_RTX_SECTION(MODE,RTX,ALIGN) text_section ();
  58
  59 #define DATA_SECTION_ASM_OP aof_data_section ()
  60
  61 #define EXTRA_SECTIONS in_zero_init, in_common
  62
  63 #define EXTRA_SECTION_FUNCTIONS \
  64 ZERO_INIT_SECTION               \
  65 COMMON_SECTION
  66
  67 #define ZERO_INIT_SECTION                                       \
  68 void                                                            \
  69 zero_init_section ()                                            \
  70 {                                                               \
  71   static int zero_init_count = 1;                               \
  72   if (in_section != in_zero_init)                               \
  73     {                                                           \
  74       fprintf (asm_out_file, "\tAREA |C$$zidata%d|,NOINIT\n",   \
  75                zero_init_count++);                              \
  76       in_section = in_zero_init;                                \
  77     }                                                           \
  78 }
  79
  80 /* Used by ASM_OUTPUT_COMMON (below) to tell varasm.c that we've
  81    changed areas.  */
  82 #define COMMON_SECTION                                          \
  83 void                                                            \
  84 common_section ()                                               \
  85 {                                                               \
  86   if (in_section != in_common)                                  \
  87     {                                                           \
  88       in_section = in_common;                                   \
  89     }                                                           \
  90 }
  91 #define CTOR_LIST_BEGIN                                 \
  92 asm (CTORS_SECTION_ASM_OP);                             \
  93 extern func_ptr __CTOR_END__[1];                        \
  94 func_ptr __CTOR_LIST__[1] = {__CTOR_END__};
  95
  96 #define CTOR_LIST_END                                   \
  97 asm (CTORS_SECTION_ASM_OP);                             \
  98 func_ptr __CTOR_END__[1] = { (func_ptr) 0 };
  99
 100 #define DO_GLOBAL_CTORS_BODY            \
 101 do {                                    \
 102   func_ptr *ptr = __CTOR_LIST__ + 1;    \
 103   while (*ptr)                          \
 104     (*ptr++) ();                        \
 105 } while (0)
 106
 107 #define DTOR_LIST_BEGIN                                 \
 108 asm (DTORS_SECTION_ASM_OP);                             \
 109 extern func_ptr __DTOR_END__[1];                        \
 110 func_ptr __DTOR_LIST__[1] = {__DTOR_END__};
 111
 112 #define DTOR_LIST_END                                   \
 113 asm (DTORS_SECTION_ASM_OP);                             \
 114 func_ptr __DTOR_END__[1] = { (func_ptr) 0 };
 115
 116 #define DO_GLOBAL_DTORS_BODY            \
 117 do {                                    \
 118   func_ptr *ptr = __DTOR_LIST__ + 1;    \
 119   while (*ptr)                          \
 120     (*ptr++) ();                        \
 121 } while (0)
 122
 123 /* We really want to put Thumb tables in a read-only data section, but
 124    switching to another section during function output is not
 125    possible.  We could however do what the SPARC does and defer the
 126    whole table generation until the end of the function.  */
 127 #define JUMP_TABLES_IN_TEXT_SECTION 1
 128
 129 #ifndef ARM_OS_NAME
 130 #define ARM_OS_NAME "(generic)"
 131 #endif
 132
 133 /* For the AOF linker, we need to reference __main to force the standard
 134    library to get linked in. */
 135
 136 #define ASM_FILE_START(STREAM)                                  \
 137 {                                                               \
 138   fprintf ((STREAM), "%s Generated by gcc %s for ARM/%s\n",     \
 139            ASM_COMMENT_START, version_string, ARM_OS_NAME);     \
 140   fprintf ((STREAM), "__r0\tRN\t0\n");                          \
 141   fprintf ((STREAM), "__a1\tRN\t0\n");                          \
 142   fprintf ((STREAM), "__a2\tRN\t1\n");                          \
 143   fprintf ((STREAM), "__a3\tRN\t2\n");                          \
 144   fprintf ((STREAM), "__a4\tRN\t3\n");                          \
 145   fprintf ((STREAM), "__v1\tRN\t4\n");                          \
 146   fprintf ((STREAM), "__v2\tRN\t5\n");                          \
 147   fprintf ((STREAM), "__v3\tRN\t6\n");                          \
 148   fprintf ((STREAM), "__v4\tRN\t7\n");                          \
 149   fprintf ((STREAM), "__v5\tRN\t8\n");                          \
 150   fprintf ((STREAM), "__v6\tRN\t9\n");                          \
 151   fprintf ((STREAM), "__sl\tRN\t10\n");                         \
 152   fprintf ((STREAM), "__fp\tRN\t11\n");                         \
 153   fprintf ((STREAM), "__ip\tRN\t12\n");                         \
 154   fprintf ((STREAM), "__sp\tRN\t13\n");                         \
 155   fprintf ((STREAM), "__lr\tRN\t14\n");                         \
 156   fprintf ((STREAM), "__pc\tRN\t15\n");                         \
 157   fprintf ((STREAM), "__f0\tFN\t0\n");                          \
 158   fprintf ((STREAM), "__f1\tFN\t1\n");                          \
 159   fprintf ((STREAM), "__f2\tFN\t2\n");                          \
 160   fprintf ((STREAM), "__f3\tFN\t3\n");                          \
 161   fprintf ((STREAM), "__f4\tFN\t4\n");                          \
 162   fprintf ((STREAM), "__f5\tFN\t5\n");                          \
 163   fprintf ((STREAM), "__f6\tFN\t6\n");                          \
 164   fprintf ((STREAM), "__f7\tFN\t7\n");                          \
 165   text_section ();                                              \
 166 }
 167
 168 /* Some systems use __main in a way incompatible with its use in gcc, in these
 169    cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
 170    give the same symbol without quotes for an alternative entry point.  You
 171    must define both, or neither. */
 172 #define NAME__MAIN "__gccmain"
 173 #define SYMBOL__MAIN __gccmain
 174
 175 #define ASM_FILE_END(STREAM)            \
 176 do                                      \
 177 {                                       \
 178   if (flag_pic)                         \
 179     aof_dump_pic_table (STREAM);        \
 180   aof_dump_imports (STREAM);            \
 181   fputs ("\tEND\n", (STREAM));          \
 182 } while (0);
 183
 184 #define ASM_COMMENT_START ";"
 185
 186 #define ASM_APP_ON ""
 187
 188 #define ASM_APP_OFF ""
 189
 190 #define ASM_OUTPUT_ASCII(STREAM,PTR,LEN)                \
 191 {                                                       \
 192   int i;                                                \
 193   const char *ptr = (PTR);                              \
 194   fprintf ((STREAM), "\tDCB");                          \
 195   for (i = 0; i < (long)(LEN); i++)                     \
 196     fprintf ((STREAM), " &%02x%s",                      \
 197              (unsigned ) *(ptr++),                      \
 198              (i + 1 < (long)(LEN)                               \
 199               ? ((i & 3) == 3 ? "\n\tDCB" : ",")        \
 200               : "\n"));                                 \
 201 }
 202
 203 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n')
 204
 205 /* Output of Uninitialized Variables */
 206
 207 #define ASM_OUTPUT_COMMON(STREAM,NAME,SIZE,ROUNDED)             \
 208   (common_section (),                                           \
 209    fprintf ((STREAM), "\tAREA "),                               \
 210    assemble_name ((STREAM), (NAME)),                            \
 211    fprintf ((STREAM), ", DATA, COMMON\n\t%% %d\t%s size=%d\n",  \
 212             (ROUNDED), ASM_COMMENT_START, SIZE))
 213
 214 #define ASM_OUTPUT_LOCAL(STREAM,NAME,SIZE,ROUNDED)      \
 215    (zero_init_section (),                               \
 216     assemble_name ((STREAM), (NAME)),                   \
 217     fprintf ((STREAM), "\n"),                           \
 218     fprintf ((STREAM), "\t%% %d\t%s size=%d\n",         \
 219              (ROUNDED), ASM_COMMENT_START, SIZE))
 220
 221 /* Output and Generation of Labels */
 222
 223 extern int arm_main_function;
 224
 225 #define ASM_GLOBALIZE_LABEL(STREAM,NAME)                \
 226 do {                                                    \
 227   fprintf ((STREAM), "\tEXPORT\t");                     \
 228   assemble_name ((STREAM), (NAME));                     \
 229   fputc ('\n', (STREAM));                               \
 230   if ((NAME)[0] == 'm' && ! strcmp ((NAME), "main"))    \
 231     arm_main_function = 1;                              \
 232 } while (0)
 233
 234 #define ASM_OUTPUT_LABEL(STREAM,NAME)   \
 235 do {                                    \
 236   assemble_name (STREAM,NAME);          \
 237   fputs ("\n", STREAM);                 \
 238 } while (0)
 239
 240 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \
 241 {                                               \
 242   if (TARGET_POKE_FUNCTION_NAME)                \
 243     arm_poke_function_name ((STREAM), (NAME));  \
 244   ASM_OUTPUT_LABEL (STREAM, NAME);              \
 245   if (! TREE_PUBLIC (DECL))                     \
 246     {                                           \
 247       fputs ("\tKEEP ", STREAM);                \
 248       ASM_OUTPUT_LABEL (STREAM, NAME);          \
 249     }                                           \
 250   aof_delete_import ((NAME));                   \
 251 }
 252
 253 #define ASM_DECLARE_OBJECT_NAME(STREAM,NAME,DECL) \
 254 {                                               \
 255   ASM_OUTPUT_LABEL (STREAM, NAME);              \
 256   if (! TREE_PUBLIC (DECL))                     \
 257     {                                           \
 258       fputs ("\tKEEP ", STREAM);                \
 259       ASM_OUTPUT_LABEL (STREAM, NAME);          \
 260     }                                           \
 261   aof_delete_import ((NAME));                   \
 262 }
 263
 264 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME)   \
 265  aof_add_import ((NAME))
 266
 267 #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM,SYMREF)      \
 268  (fprintf ((STREAM), "\tIMPORT\t"),                     \
 269   assemble_name ((STREAM), XSTR ((SYMREF), 0)),         \
 270   fputc ('\n', (STREAM)))
 271
 272 #define ASM_OUTPUT_LABELREF(STREAM,NAME)        \
 273   fprintf ((STREAM), "|%s|", NAME)
 274
 275 #define ASM_GENERATE_INTERNAL_LABEL(STRING,PREFIX,NUM)  \
 276   sprintf ((STRING), "*|%s..%ld|", (PREFIX), (long)(NUM))
 277
 278 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR,NAME,NUMBER)     \
 279  ((OUTVAR) = (char *) alloca (strlen ((NAME)) + 10),    \
 280   sprintf ((OUTVAR), "%s.%d", (NAME), (NUMBER)))
 281
 282 /* How initialization functions are handled */
 283
 284 #define CTORS_SECTION_ASM_OP "\tAREA\t|C$$gnu_ctorsvec|, DATA, READONLY"
 285 #define DTORS_SECTION_ASM_OP "\tAREA\t|C$$gnu_dtorsvec|, DATA, READONLY"
 286
 287 /* Output of Assembler Instructions */
 288
 289 #define REGISTER_NAMES                  \
 290 {                                       \
 291   "a1", "a2", "a3", "a4",       \
 292   "v1", "v2", "v3", "v4",       \
 293   "v5", "v6", "sl", "fp",       \
 294   "ip", "sp", "lr", "pc",       \
 295   "f0", "f1", "f2", "f3",       \
 296   "f4", "f5", "f6", "f7",       \
 297   "cc", "sfp", "afp"            \
 298 }
 299
 300 #define ADDITIONAL_REGISTER_NAMES               \
 301 {                                               \
 302   {"r0", 0}, {"a1", 0},                         \
 303   {"r1", 1}, {"a2", 1},                         \
 304   {"r2", 2}, {"a3", 2},                         \
 305   {"r3", 3}, {"a4", 3},                         \
 306   {"r4", 4}, {"v1", 4},                         \
 307   {"r5", 5}, {"v2", 5},                         \
 308   {"r6", 6}, {"v3", 6},                         \
 309   {"r7", 7}, {"wr", 7},                         \
 310   {"r8", 8}, {"v5", 8},                         \
 311   {"r9", 9}, {"v6", 9},                         \
 312   {"r10", 10}, {"sl", 10}, {"v7", 10},          \
 313   {"r11", 11}, {"fp", 11},                      \
 314   {"r12", 12}, {"ip", 12},                      \
 315   {"r13", 13}, {"sp", 13},                      \
 316   {"r14", 14}, {"lr", 14},                      \
 317   {"r15", 15}, {"pc", 15}                       \
 318 }
 319
 320 #define REGISTER_PREFIX "__"
 321 #define USER_LABEL_PREFIX ""
 322 #define LOCAL_LABEL_PREFIX ""
 323
 324 /* AOF does not prefix user function names with an underscore.  */
 325 #define ARM_MCOUNT_NAME "_mcount"
 326
 327 /* Output of Dispatch Tables */
 328
 329 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL)                 \
 330   do {                                                                  \
 331     if (TARGET_ARM)                                                     \
 332       fprintf ((STREAM), "\tb\t|L..%d|\n", (VALUE));                    \
 333     else                                                                \
 334       fprintf ((STREAM), "\tDCD\t|L..%d| - |L..%d|\n", (VALUE), (REL)); \
 335   } while (0)
 336
 337 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE)   \
 338   fprintf ((STREAM), "\tDCD\t|L..%d|\n", (VALUE))
 339
 340 /* A label marking the start of a jump table is a data label. */
 341 #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE)  \
 342   fprintf ((STREAM), "\tALIGN\n|%s..%d|\n", (PREFIX), (NUM))
 343
 344 /* Assembler Commands for Alignment */
 345
 346 #define ASM_OUTPUT_SKIP(STREAM,NBYTES)          \
 347  fprintf ((STREAM), "\t%%\t%d\n", (NBYTES))
 348
 349 #define ASM_OUTPUT_ALIGN(STREAM,POWER)                  \
 350 do {                                                    \
 351   register int amount = 1 << (POWER);                   \
 352   if (amount == 2)                                      \
 353     fprintf ((STREAM), "\tALIGN 2\n");                  \
 354   else if (amount == 4)                                 \
 355     fprintf ((STREAM), "\tALIGN\n");                    \
 356   else                                                  \
 357     fprintf ((STREAM), "\tALIGN %d\n", amount);         \
 358 } while (0)
 359
 360 #undef DBX_DEBUGGING_INFO