gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995, 1996 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC 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 GNU CC 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 GNU CC; 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 #ifndef ARM_OS_NAME
  23 #define ARM_OS_NAME "(generic)"
  24 #endif
  25
  26 #define ASM_OUTPUT_OPTIONS(FILE)                                        \
  27   output_options(FILE,                                                  \
  28                  f_options, sizeof (f_options) / sizeof (f_options[0]), \
  29                  W_options, sizeof (W_options) / sizeof (W_options[0]))
  30
  31 /* The text to go at the start of the assembler file */
  32 #define ASM_FILE_START(STREAM)                                              \
  33 {                                                                           \
  34   extern char *version_string;                                              \
  35   fprintf (STREAM,"%s Generated by gcc %s for ARM/%s\n",                    \
  36            ASM_COMMENT_START, version_string, ARM_OS_NAME);                 \
  37   ASM_OUTPUT_OPTIONS(STREAM);                                               \
  38   fprintf (STREAM,"%srfp\t.req\t%sr9\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  39   fprintf (STREAM,"%ssl\t.req\t%sr10\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  40   fprintf (STREAM,"%sfp\t.req\t%sr11\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  41   fprintf (STREAM,"%sip\t.req\t%sr12\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  42   fprintf (STREAM,"%ssp\t.req\t%sr13\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  43   fprintf (STREAM,"%slr\t.req\t%sr14\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  44   fprintf (STREAM,"%spc\t.req\t%sr15\n", REGISTER_PREFIX, REGISTER_PREFIX); \
  45 }
  46
  47 #define ASM_APP_ON  ""
  48 #define ASM_APP_OFF  ""
  49
  50 /* Switch to the text or data segment.  */
  51 #define TEXT_SECTION_ASM_OP  ".text"
  52 #define DATA_SECTION_ASM_OP  ".data"
  53 #define BSS_SECTION_ASM_OP   ".bss"
  54
  55 #define REGISTER_PREFIX ""
  56 #define USER_LABEL_PREFIX "_"
  57 #define LOCAL_LABEL_PREFIX ""
  58
  59 /* The assembler's names for the registers.  */
  60 #ifndef REGISTER_NAMES
  61 #define REGISTER_NAMES  \
  62 {                                                  \
  63   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",  \
  64   "r8", "r9", "sl", "fp", "ip", "sp", "lr", "pc",  \
  65   "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",  \
  66   "cc", "sfp", "afp"                               \
  67 }
  68 #endif
  69
  70 #ifndef ADDITIONAL_REGISTER_NAMES
  71 #define ADDITIONAL_REGISTER_NAMES               \
  72 {                                               \
  73   {"a1", 0},                                    \
  74   {"a2", 1},                                    \
  75   {"a3", 2},                                    \
  76   {"a4", 3},                                    \
  77   {"v1", 4},                                    \
  78   {"v2", 5},                                    \
  79   {"v3", 6},                                    \
  80   {"v4", 7},                                    \
  81   {"v5", 8},                                    \
  82   {"v6", 9},                                    \
  83   {"rfp", 9}, /* Gcc used to call it this */    \
  84   {"sb", 9},                                    \
  85   {"v7", 10},                                   \
  86   {"r10", 10},  /* sl */                        \
  87   {"r11", 11},  /* fp */                        \
  88   {"r12", 12},  /* ip */                        \
  89   {"r13", 13},  /* sp */                        \
  90   {"r14", 14},  /* lr */                        \
  91   {"r15", 15}   /* pc */                        \
  92 }
  93 #endif
  94
  95 /* Arm Assembler barfs on dollars */
  96 #define DOLLARS_IN_IDENTIFIERS 0
  97
  98 #define NO_DOLLAR_IN_LABEL
  99
 100 /* DBX register number for a given compiler register number */
 101 #define DBX_REGISTER_NUMBER(REGNO)  (REGNO)
 102
 103 /* Generate DBX debugging information.  riscix.h will undefine this because
 104    the native assembler does not support stabs. */
 105 #define DBX_DEBUGGING_INFO  1
 106
 107 /* Acorn dbx moans about continuation chars, so don't use any.  */
 108 #ifndef DBX_CONTIN_LENGTH
 109 #define DBX_CONTIN_LENGTH  0
 110 #endif
 111
 112 /* Output a source filename for the debugger. RISCiX dbx insists that the
 113    ``desc'' field is set to compiler version number >= 315 (sic).  */
 114 #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM,NAME)                    \
 115 do {                                                                    \
 116   fprintf (STREAM, ".stabs \"%s\",%d,0,315,%s\n", (NAME), N_SO,         \
 117            &ltext_label_name[1]);                                       \
 118   text_section ();                                                      \
 119   ASM_OUTPUT_INTERNAL_LABEL (STREAM, "Ltext", 0);                       \
 120 } while (0)
 121
 122 /* Output a function label definition.  */
 123 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \
 124     ASM_OUTPUT_LABEL(STREAM, NAME)
 125
 126 #define ARM_OUTPUT_LABEL(STREAM,NAME)   \
 127 do {                                    \
 128   assemble_name (STREAM,NAME);          \
 129   fputs (":\n", STREAM);                \
 130 } while (0)
 131
 132 /* Output a globalising directive for a label.  */
 133 #define ASM_GLOBALIZE_LABEL(STREAM,NAME)  \
 134   (fprintf (STREAM, "\t.global\t"),       \
 135    assemble_name (STREAM, NAME),          \
 136    fputc ('\n',STREAM))                   \
 137
 138 /* Output a reference to a label.  */
 139 #define ASM_OUTPUT_LABELREF(STREAM,NAME)  \
 140   fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, NAME)
 141
 142 /* Make an internal label into a string.  */
 143 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 144   sprintf (STRING, "*%s%s%d", LOCAL_LABEL_PREFIX, PREFIX, NUM)
 145
 146 /* Nothing special is done about jump tables */
 147 /* #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE)   */
 148 /* #define ASM_OUTPUT_CASE_END(STREAM,NUM,TABLE)            */
 149
 150 /* Construct a private name.  */
 151 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR,NAME,NUMBER)  \
 152   ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
 153    sprintf ((OUTVAR), "%s.%d", (NAME), (NUMBER)))
 154
 155 /* Output an element of a dispatch table.  */
 156 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE)  \
 157    fprintf (STREAM, "\t.word\t%sL%d\n", LOCAL_LABEL_PREFIX, VALUE)
 158
 159 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,VALUE,REL)  \
 160    fprintf (STREAM, "\tb\t%sL%d\n", LOCAL_LABEL_PREFIX, (VALUE))
 161
 162 /* Output various types of constants.  For real numbers we output hex, with
 163    a comment containing the "human" value, this allows us to pass NaN's which
 164    the riscix assembler doesn't understand (it also makes cross-assembling
 165    less likely to fail). */
 166
 167 #define ASM_OUTPUT_LONG_DOUBLE(STREAM,VALUE)                            \
 168 do { char dstr[30];                                                     \
 169      long l[3];                                                         \
 170      arm_increase_location (12);                                        \
 171      REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l);                       \
 172      REAL_VALUE_TO_DECIMAL (VALUE, "%.20g", dstr);                      \
 173      fprintf (STREAM, "\t.long 0x%lx,0x%lx,0x%lx\t%s long double %s\n", \
 174               l[0], l[1], l[2], ASM_COMMENT_START, dstr);               \
 175    } while (0)
 176
 177
 178 #define ASM_OUTPUT_DOUBLE(STREAM, VALUE)                                \
 179 do { char dstr[30];                                                     \
 180      long l[2];                                                         \
 181      arm_increase_location (8);                                         \
 182      REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l);                            \
 183      REAL_VALUE_TO_DECIMAL (VALUE, "%.14g", dstr);                      \
 184      fprintf (STREAM, "\t.long 0x%lx, 0x%lx\t%s double %s\n", l[0],     \
 185               l[1], ASM_COMMENT_START, dstr);                           \
 186    } while (0)
 187
 188 #define ASM_OUTPUT_FLOAT(STREAM, VALUE)                                 \
 189 do { char dstr[30];                                                     \
 190      long l;                                                            \
 191      arm_increase_location (4);                                         \
 192      REAL_VALUE_TO_TARGET_SINGLE (VALUE, l);                            \
 193      REAL_VALUE_TO_DECIMAL (VALUE, "%.7g", dstr);                       \
 194      fprintf (STREAM, "\t.word 0x%lx\t%s float %s\n", l,                \
 195               ASM_COMMENT_START, dstr);                                 \
 196    } while (0);
 197
 198 #define ASM_OUTPUT_INT(STREAM, EXP)     \
 199   (fprintf (STREAM, "\t.word\t"),       \
 200    output_addr_const (STREAM, (EXP)),   \
 201    arm_increase_location (4),           \
 202    fputc ('\n', STREAM))
 203
 204 #define ASM_OUTPUT_SHORT(STREAM, EXP)  \
 205   (fprintf (STREAM, "\t.short\t"),     \
 206    output_addr_const (STREAM, (EXP)),  \
 207    arm_increase_location (2),          \
 208    fputc ('\n', STREAM))
 209
 210 #define ASM_OUTPUT_CHAR(STREAM, EXP)  \
 211   (fprintf (STREAM, "\t.byte\t"),      \
 212    output_addr_const (STREAM, (EXP)),  \
 213    arm_increase_location (1),          \
 214    fputc ('\n', STREAM))
 215
 216 #define ASM_OUTPUT_BYTE(STREAM, VALUE)  \
 217   (fprintf (STREAM, "\t.byte\t%d\n", VALUE),  \
 218    arm_increase_location (1))
 219
 220 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 221   output_ascii_pseudo_op ((STREAM), (unsigned char *)(PTR), (LEN))
 222
 223 /* Output a gap.  In fact we fill it with nulls.  */
 224 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)  \
 225   (arm_increase_location (NBYTES),              \
 226    fprintf (STREAM, "\t.space\t%d\n", NBYTES))
 227
 228 /* Align output to a power of two.  Horrible /bin/as.  */
 229 #define ASM_OUTPUT_ALIGN(STREAM, POWER)  \
 230   do                                                           \
 231     {                                                          \
 232       register int amount = 1 << (POWER);                      \
 233       extern int arm_text_location;                            \
 234                                                                \
 235       if (amount == 2)                                         \
 236         fprintf (STREAM, "\t.even\n");                         \
 237       else if (amount != 1)                                    \
 238         fprintf (STREAM, "\t.align\t%d\n", amount - 4);        \
 239                                                                \
 240       if (in_text_section ())                                  \
 241         arm_text_location = ((arm_text_location + amount - 1)  \
 242                              & ~(amount - 1));                 \
 243     } while (0)
 244
 245 /* Output a common block */
 246 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)                  \
 247   (fprintf (STREAM, "\t.comm\t"),                                       \
 248    assemble_name ((STREAM), (NAME)),                                    \
 249    fprintf(STREAM, ", %d\t%s %d\n", ROUNDED, ASM_COMMENT_START, SIZE))
 250
 251 /* Output a local common block.  /bin/as can't do this, so hack a `.space' into
 252    the bss segment.  Note that this is *bad* practice.  */
 253 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM,NAME,SIZE,ALIGN)  \
 254   output_lcomm_directive (STREAM, NAME, SIZE, ALIGN)
 255
 256 /* Output a zero-initialized block.  */
 257 #define ASM_OUTPUT_ALIGNED_BSS(STREAM,NAME,SIZE,ALIGN) \
 258   asm_output_aligned_bss(STREAM, NAME, SIZE, ALIGN)
 259
 260 /* Output a source line for the debugger.  */
 261 /* #define ASM_OUTPUT_SOURCE_LINE(STREAM,LINE) */
 262
 263 /* Output a #ident directive.  */
 264 #define ASM_OUTPUT_IDENT(STREAM,STRING)  \
 265   fprintf (STREAM,"- - - ident %s\n",STRING)
 266
 267 /* The assembler's parentheses characters.  */
 268 #define ASM_OPEN_PAREN "("
 269 #define ASM_CLOSE_PAREN ")"
 270
 271 #ifndef ASM_COMMENT_START
 272 #define ASM_COMMENT_START "@"
 273 #endif
 274
 275 #include "arm/arm.h"