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 #define JUMP_TABLES_IN_TEXT_SECTION 1
 124
 125 #ifndef ARM_OS_NAME
 126 #define ARM_OS_NAME "(generic)"
 127 #endif
 128
 129 /* For the AOF linker, we need to reference __main to force the standard
 130    library to get linked in. */
 131
 132 #define ASM_FILE_START(STREAM)                                  \
 133 {                                                               \
 134   fprintf ((STREAM), "%s Generated by gcc %s for ARM/%s\n",     \
 135            ASM_COMMENT_START, version_string, ARM_OS_NAME);     \
 136   fprintf ((STREAM), "__r0\tRN\t0\n");                          \
 137   fprintf ((STREAM), "__a1\tRN\t0\n");                          \
 138   fprintf ((STREAM), "__a2\tRN\t1\n");                          \
 139   fprintf ((STREAM), "__a3\tRN\t2\n");                          \
 140   fprintf ((STREAM), "__a4\tRN\t3\n");                          \
 141   fprintf ((STREAM), "__v1\tRN\t4\n");                          \
 142   fprintf ((STREAM), "__v2\tRN\t5\n");                          \
 143   fprintf ((STREAM), "__v3\tRN\t6\n");                          \
 144   fprintf ((STREAM), "__v4\tRN\t7\n");                          \
 145   fprintf ((STREAM), "__v5\tRN\t8\n");                          \
 146   fprintf ((STREAM), "__v6\tRN\t9\n");                          \
 147   fprintf ((STREAM), "__sl\tRN\t10\n");                         \
 148   fprintf ((STREAM), "__fp\tRN\t11\n");                         \
 149   fprintf ((STREAM), "__ip\tRN\t12\n");                         \
 150   fprintf ((STREAM), "__sp\tRN\t13\n");                         \
 151   fprintf ((STREAM), "__lr\tRN\t14\n");                         \
 152   fprintf ((STREAM), "__pc\tRN\t15\n");                         \
 153   fprintf ((STREAM), "__f0\tFN\t0\n");                          \
 154   fprintf ((STREAM), "__f1\tFN\t1\n");                          \
 155   fprintf ((STREAM), "__f2\tFN\t2\n");                          \
 156   fprintf ((STREAM), "__f3\tFN\t3\n");                          \
 157   fprintf ((STREAM), "__f4\tFN\t4\n");                          \
 158   fprintf ((STREAM), "__f5\tFN\t5\n");                          \
 159   fprintf ((STREAM), "__f6\tFN\t6\n");                          \
 160   fprintf ((STREAM), "__f7\tFN\t7\n");                          \
 161   text_section ();                                              \
 162 }
 163
 164 /* Some systems use __main in a way incompatible with its use in gcc, in these
 165    cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
 166    give the same symbol without quotes for an alternative entry point.  You
 167    must define both, or neither. */
 168 #define NAME__MAIN "__gccmain"
 169 #define SYMBOL__MAIN __gccmain
 170
 171 #define ASM_FILE_END(STREAM)            \
 172 do                                      \
 173 {                                       \
 174   if (flag_pic)                         \
 175     aof_dump_pic_table (STREAM);        \
 176   aof_dump_imports (STREAM);            \
 177   fputs ("\tEND\n", (STREAM));          \
 178 } while (0);
 179
 180 #define ASM_COMMENT_START ";"
 181
 182 #define ASM_APP_ON ""
 183
 184 #define ASM_APP_OFF ""
 185
 186 #define ASM_OUTPUT_LONG_DOUBLE(STREAM,VALUE) \
 187   ASM_OUTPUT_DOUBLE((STREAM),(VALUE))
 188
 189 #define ASM_OUTPUT_DOUBLE(STREAM,VALUE)                         \
 190 do {                                                            \
 191   char dstr[30];                                                \
 192   long l[2];                                                    \
 193   REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), l);                     \
 194   REAL_VALUE_TO_DECIMAL ((VALUE), "%.14g", dstr);               \
 195   fprintf ((STREAM), "\tDCD &%lx, &%lx\t%s double %s\n",        \
 196            l[0], l[1], ASM_COMMENT_START, dstr);                \
 197 } while (0)
 198
 199 #define ASM_OUTPUT_FLOAT(STREAM,VALUE)                  \
 200 do {                                                    \
 201   char dstr[30];                                        \
 202   long l;                                               \
 203   REAL_VALUE_TO_TARGET_SINGLE ((VALUE), l);             \
 204   REAL_VALUE_TO_DECIMAL ((VALUE), "%.7g", dstr);        \
 205   fprintf ((STREAM), "\tDCD &%lx\t%s double %s\n",      \
 206            l, ASM_COMMENT_START, dstr);                 \
 207 } while (0)
 208
 209 #define ASM_OUTPUT_ASCII(STREAM,PTR,LEN)                \
 210 {                                                       \
 211   int i;                                                \
 212   const char *ptr = (PTR);                              \
 213   fprintf ((STREAM), "\tDCB");                          \
 214   for (i = 0; i < (long)(LEN); i++)                     \
 215     fprintf ((STREAM), " &%02x%s",                      \
 216              (unsigned ) *(ptr++),                      \
 217              (i + 1 < (long)(LEN)                               \
 218               ? ((i & 3) == 3 ? "\n\tDCB" : ",")        \
 219               : "\n"));                                 \
 220 }
 221
 222 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n')
 223
 224 /* Output of Uninitialized Variables */
 225
 226 #define ASM_OUTPUT_COMMON(STREAM,NAME,SIZE,ROUNDED)             \
 227   (common_section (),                                           \
 228    fprintf ((STREAM), "\tAREA "),                               \
 229    assemble_name ((STREAM), (NAME)),                            \
 230    fprintf ((STREAM), ", DATA, COMMON\n\t%% %d\t%s size=%d\n",  \
 231             (ROUNDED), ASM_COMMENT_START, SIZE))
 232
 233 #define ASM_OUTPUT_LOCAL(STREAM,NAME,SIZE,ROUNDED)      \
 234    (zero_init_section (),                               \
 235     assemble_name ((STREAM), (NAME)),                   \
 236     fprintf ((STREAM), "\n"),                           \
 237     fprintf ((STREAM), "\t%% %d\t%s size=%d\n",         \
 238              (ROUNDED), ASM_COMMENT_START, SIZE))
 239
 240 /* Output and Generation of Labels */
 241
 242 extern int arm_main_function;
 243
 244 #define ASM_GLOBALIZE_LABEL(STREAM,NAME)                \
 245 do {                                                    \
 246   fprintf ((STREAM), "\tEXPORT\t");                     \
 247   assemble_name ((STREAM), (NAME));                     \
 248   fputc ('\n', (STREAM));                               \
 249   if ((NAME)[0] == 'm' && ! strcmp ((NAME), "main"))    \
 250     arm_main_function = 1;                              \
 251 } while (0)
 252
 253 #define ASM_OUTPUT_LABEL(STREAM,NAME)   \
 254 do {                                    \
 255   assemble_name (STREAM,NAME);          \
 256   fputs ("\n", STREAM);                 \
 257 } while (0)
 258
 259 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \
 260 {                                               \
 261   if (TARGET_POKE_FUNCTION_NAME)                \
 262     arm_poke_function_name ((STREAM), (NAME));  \
 263   ASM_OUTPUT_LABEL (STREAM, NAME);              \
 264   if (! TREE_PUBLIC (DECL))                     \
 265     {                                           \
 266       fputs ("\tKEEP ", STREAM);                \
 267       ASM_OUTPUT_LABEL (STREAM, NAME);          \
 268     }                                           \
 269   aof_delete_import ((NAME));                   \
 270 }
 271
 272 #define ASM_DECLARE_OBJECT_NAME(STREAM,NAME,DECL) \
 273 {                                               \
 274   ASM_OUTPUT_LABEL (STREAM, NAME);              \
 275   if (! TREE_PUBLIC (DECL))                     \
 276     {                                           \
 277       fputs ("\tKEEP ", STREAM);                \
 278       ASM_OUTPUT_LABEL (STREAM, NAME);          \
 279     }                                           \
 280   aof_delete_import ((NAME));                   \
 281 }
 282
 283 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME)   \
 284  aof_add_import ((NAME))
 285
 286 #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM,SYMREF)      \
 287  (fprintf ((STREAM), "\tIMPORT\t"),                     \
 288   assemble_name ((STREAM), XSTR ((SYMREF), 0)),         \
 289   fputc ('\n', (STREAM)))
 290
 291 #define ASM_OUTPUT_LABELREF(STREAM,NAME)        \
 292   fprintf ((STREAM), "|%s|", NAME)
 293
 294 #define ASM_GENERATE_INTERNAL_LABEL(STRING,PREFIX,NUM)  \
 295   sprintf ((STRING), "*|%s..%ld|", (PREFIX), (long)(NUM))
 296
 297 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR,NAME,NUMBER)     \
 298  ((OUTVAR) = (char *) alloca (strlen ((NAME)) + 10),    \
 299   sprintf ((OUTVAR), "%s.%d", (NAME), (NUMBER)))
 300
 301 /* How initialization functions are handled */
 302
 303 #define CTORS_SECTION_ASM_OP "\tAREA\t|C$$gnu_ctorsvec|, DATA, READONLY"
 304 #define DTORS_SECTION_ASM_OP "\tAREA\t|C$$gnu_dtorsvec|, DATA, READONLY"
 305
 306 /* Output of Assembler Instructions */
 307
 308 #define REGISTER_NAMES                  \
 309 {                                       \
 310   "a1", "a2", "a3", "a4",       \
 311   "v1", "v2", "v3", "v4",       \
 312   "v5", "v6", "sl", "fp",       \
 313   "ip", "sp", "lr", "pc",       \
 314   "f0", "f1", "f2", "f3",       \
 315   "f4", "f5", "f6", "f7",       \
 316   "cc", "sfp", "afp"            \
 317 }
 318
 319 #define ADDITIONAL_REGISTER_NAMES               \
 320 {                                               \
 321   {"r0", 0}, {"a1", 0},                         \
 322   {"r1", 1}, {"a2", 1},                         \
 323   {"r2", 2}, {"a3", 2},                         \
 324   {"r3", 3}, {"a4", 3},                         \
 325   {"r4", 4}, {"v1", 4},                         \
 326   {"r5", 5}, {"v2", 5},                         \
 327   {"r6", 6}, {"v3", 6},                         \
 328   {"r7", 7}, {"wr", 7},                         \
 329   {"r8", 8}, {"v5", 8},                         \
 330   {"r9", 9}, {"v6", 9},                         \
 331   {"r10", 10}, {"sl", 10}, {"v7", 10},          \
 332   {"r11", 11}, {"fp", 11},                      \
 333   {"r12", 12}, {"ip", 12},                      \
 334   {"r13", 13}, {"sp", 13},                      \
 335   {"r14", 14}, {"lr", 14},                      \
 336   {"r15", 15}, {"pc", 15}                       \
 337 }
 338
 339 #define REGISTER_PREFIX "__"
 340 #define USER_LABEL_PREFIX ""
 341 #define LOCAL_LABEL_PREFIX ""
 342
 343 /* AOF does not prefix user function names with an underscore.  */
 344 #define ARM_MCOUNT_NAME "_mcount"
 345
 346 /* Output of Dispatch Tables */
 347
 348 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL)         \
 349   fprintf ((STREAM), "\tb\t|L..%d|\n", (VALUE))
 350
 351 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE)   \
 352   fprintf ((STREAM), "\tDCD\t|L..%d|\n", (VALUE))
 353
 354 /* A label marking the start of a jump table is a data label. */
 355 #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE)  \
 356   fprintf ((STREAM), "\tALIGN\n|%s..%d|\n", (PREFIX), (NUM))
 357
 358 /* Assembler Commands for Alignment */
 359
 360 #define ASM_OUTPUT_SKIP(STREAM,NBYTES)          \
 361  fprintf ((STREAM), "\t%%\t%d\n", (NBYTES))
 362
 363 #define ASM_OUTPUT_ALIGN(STREAM,POWER)                  \
 364 do {                                                    \
 365   register int amount = 1 << (POWER);                   \
 366   if (amount == 2)                                      \
 367     fprintf ((STREAM), "\tALIGN 2\n");                  \
 368   else if (amount == 4)                                 \
 369     fprintf ((STREAM), "\tALIGN\n");                    \
 370   else                                                  \
 371     fprintf ((STREAM), "\tALIGN %d\n", amount);         \
 372 } while (0)
 373
 374 #undef DBX_DEBUGGING_INFO