gcc/config/arm/aout.h

   1 /* Definitions of target machine for GNU compiler, for ARM with a.out
   2    Copyright (C) 1995-2024 Free Software Foundation, Inc.
   3    Contributed by Richard Earnshaw (rearnsha@armltd.co.uk).
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    Under Section 7 of GPL version 3, you are granted additional
  18    permissions described in the GCC Runtime Library Exception, version
  19    3.1, as published by the Free Software Foundation.
  20
  21    You should have received a copy of the GNU General Public License and
  22    a copy of the GCC Runtime Library Exception along with this program;
  23    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24    <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef ASM_APP_ON
  27 #define ASM_APP_ON              ""
  28 #endif
  29 #ifndef ASM_APP_OFF
  30 #define ASM_APP_OFF             ""
  31 #endif
  32
  33 /* Switch to the text or data segment.  */
  34 #define TEXT_SECTION_ASM_OP     "\t.text"
  35 #define DATA_SECTION_ASM_OP     "\t.data"
  36 #define BSS_SECTION_ASM_OP      "\t.bss"
  37
  38 /* Note: If USER_LABEL_PREFIX or LOCAL_LABEL_PREFIX are changed,
  39    make sure that this change is reflected in the function
  40    coff_arm_is_local_label_name() in bfd/coff-arm.c.  */
  41 #ifndef REGISTER_PREFIX
  42 #define REGISTER_PREFIX         ""
  43 #endif
  44
  45 #ifndef USER_LABEL_PREFIX
  46 #define USER_LABEL_PREFIX       "_"
  47 #endif
  48
  49 #ifndef LOCAL_LABEL_PREFIX
  50 #define LOCAL_LABEL_PREFIX      ""
  51 #endif
  52
  53 /* The assembler's names for the registers.  Note that the ?xx registers are
  54    there so that VFPv3/NEON registers D16-D31 have the same spacing as D0-D15
  55    (each of which is overlaid on two S registers), although there are no
  56    actual single-precision registers which correspond to D16-D31.  New register
  57    p0 is added which is used for MVE predicated cases.  */
  58
  59 #ifndef REGISTER_NAMES
  60 #define REGISTER_NAMES                                          \
  61 {                                                               \
  62   "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",               \
  63   "r8", "r9", "r10", "fp", "ip", "sp", "lr", "pc",              \
  64   "s0",  "s1",  "s2",  "s3",  "s4",  "s5",  "s6",  "s7",        \
  65   "s8",  "s9",  "s10", "s11", "s12", "s13", "s14", "s15",       \
  66   "s16", "s17", "s18", "s19", "s20", "s21", "s22", "s23",       \
  67   "s24", "s25", "s26", "s27", "s28", "s29", "s30", "s31",       \
  68   "d16", "?16", "d17", "?17", "d18", "?18", "d19", "?19",       \
  69   "d20", "?20", "d21", "?21", "d22", "?22", "d23", "?23",       \
  70   "d24", "?24", "d25", "?25", "d26", "?26", "d27", "?27",       \
  71   "d28", "?28", "d29", "?29", "d30", "?30", "d31", "?31",       \
  72   "wr0",   "wr1",   "wr2",   "wr3",                             \
  73   "wr4",   "wr5",   "wr6",   "wr7",                             \
  74   "wr8",   "wr9",   "wr10",  "wr11",                            \
  75   "wr12",  "wr13",  "wr14",  "wr15",                            \
  76   "wcgr0", "wcgr1", "wcgr2", "wcgr3",                           \
  77   "cc", "vfpcc", "sfp", "afp", "apsrq", "apsrge", "p0",         \
  78   "ra_auth_code"                                                \
  79 }
  80 #endif
  81
  82 #ifndef ADDITIONAL_REGISTER_NAMES
  83 #define ADDITIONAL_REGISTER_NAMES               \
  84 {                                               \
  85   {"a1", 0},                                    \
  86   {"a2", 1},                                    \
  87   {"a3", 2},                                    \
  88   {"a4", 3},                                    \
  89   {"v1", 4},                                    \
  90   {"v2", 5},                                    \
  91   {"v3", 6},                                    \
  92   {"v4", 7},                                    \
  93   {"v5", 8},                                    \
  94   {"v6", 9},                                    \
  95   {"rfp", 9}, /* Historical.  */                \
  96   {"sb", 9}, /* Historical.  */                 \
  97   {"v7", 10},                                   \
  98   {"sl", 10},   /* Historical.  */              \
  99   {"r11", 11},  /* fp */                        \
 100   {"r12", 12},  /* ip */                        \
 101   {"r13", 13},  /* sp */                        \
 102   {"r14", 14},  /* lr */                        \
 103   {"r15", 15}   /* pc */                        \
 104 }
 105 #endif
 106
 107 #ifndef OVERLAPPING_REGISTER_NAMES
 108 #define OVERLAPPING_REGISTER_NAMES              \
 109 {                                               \
 110   {"d0",  FIRST_VFP_REGNUM + 0,  2},            \
 111   {"d1",  FIRST_VFP_REGNUM + 2,  2},            \
 112   {"d2",  FIRST_VFP_REGNUM + 4,  2},            \
 113   {"d3",  FIRST_VFP_REGNUM + 6,  2},            \
 114   {"d4",  FIRST_VFP_REGNUM + 8,  2},            \
 115   {"d5",  FIRST_VFP_REGNUM + 10, 2},            \
 116   {"d6",  FIRST_VFP_REGNUM + 12, 2},            \
 117   {"d7",  FIRST_VFP_REGNUM + 14, 2},            \
 118   {"d8",  FIRST_VFP_REGNUM + 16, 2},            \
 119   {"d9",  FIRST_VFP_REGNUM + 18, 2},            \
 120   {"d10", FIRST_VFP_REGNUM + 20, 2},            \
 121   {"d11", FIRST_VFP_REGNUM + 22, 2},            \
 122   {"d12", FIRST_VFP_REGNUM + 24, 2},            \
 123   {"d13", FIRST_VFP_REGNUM + 26, 2},            \
 124   {"d14", FIRST_VFP_REGNUM + 28, 2},            \
 125   {"d15", FIRST_VFP_REGNUM + 30, 2},            \
 126   {"q0",  FIRST_VFP_REGNUM + 0,  4},            \
 127   {"q1",  FIRST_VFP_REGNUM + 4,  4},            \
 128   {"q2",  FIRST_VFP_REGNUM + 8,  4},            \
 129   {"q3",  FIRST_VFP_REGNUM + 12, 4},            \
 130   {"q4",  FIRST_VFP_REGNUM + 16, 4},            \
 131   {"q5",  FIRST_VFP_REGNUM + 20, 4},            \
 132   {"q6",  FIRST_VFP_REGNUM + 24, 4},            \
 133   {"q7",  FIRST_VFP_REGNUM + 28, 4},            \
 134   {"q8",  FIRST_VFP_REGNUM + 32, 4},            \
 135   {"q9",  FIRST_VFP_REGNUM + 36, 4},            \
 136   {"q10", FIRST_VFP_REGNUM + 40, 4},            \
 137   {"q11", FIRST_VFP_REGNUM + 44, 4},            \
 138   {"q12", FIRST_VFP_REGNUM + 48, 4},            \
 139   {"q13", FIRST_VFP_REGNUM + 52, 4},            \
 140   {"q14", FIRST_VFP_REGNUM + 56, 4},            \
 141   {"q15", FIRST_VFP_REGNUM + 60, 4}             \
 142 }
 143 #endif
 144
 145 #ifndef NO_DOLLAR_IN_LABEL
 146 #define NO_DOLLAR_IN_LABEL 1
 147 #endif
 148
 149 /* Output a function label definition.  */
 150 #ifndef ASM_DECLARE_FUNCTION_NAME
 151 #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL)   \
 152   do                                                    \
 153     {                                                   \
 154       ARM_DECLARE_FUNCTION_NAME (STREAM, NAME, DECL);   \
 155       ASM_OUTPUT_FUNCTION_LABEL (STREAM, NAME, DECL);   \
 156     }                                                   \
 157   while (0)
 158 #endif
 159
 160 /* Globalizing directive for a label.  */
 161 #define GLOBAL_ASM_OP "\t.global\t"
 162
 163 /* Make an internal label into a string.  */
 164 #ifndef ASM_GENERATE_INTERNAL_LABEL
 165 #define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
 166   sprintf (STRING, "*%s%s%u", LOCAL_LABEL_PREFIX, PREFIX, (unsigned int)(NUM))
 167 #endif
 168
 169 /* Output an element of a dispatch table.  */
 170 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE)                  \
 171   do                                                            \
 172     {                                                           \
 173       gcc_assert (!TARGET_THUMB2);                              \
 174       asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE);          \
 175     }                                                           \
 176   while (0)
 177
 178
 179 /* Thumb-2 always uses addr_diff_elf so that the Table Branch instructions
 180    can be used.  For non-pic code where the offsets do not suitable for
 181    TBB/TBH the elements are output as absolute labels.  */
 182 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL)              \
 183   do                                                                    \
 184     {                                                                   \
 185       if (TARGET_ARM)                                                   \
 186         {                                                               \
 187           switch (GET_MODE (body))                                      \
 188             {                                                           \
 189             case E_QImode:                                              \
 190               asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LLrtx%d-4)/4\n",   \
 191                            VALUE, REL);                                 \
 192               break;                                                    \
 193             case E_HImode:                                              \
 194               asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LLrtx%d-4)/4\n",  \
 195                            VALUE, REL);                                 \
 196               break;                                                    \
 197             case E_SImode:                                              \
 198               if (flag_pic)                                             \
 199                 asm_fprintf (STREAM, "\t.word\t%LL%d-%LLrtx%d-4\n",     \
 200                              VALUE, REL);                               \
 201               else                                                      \
 202                 asm_fprintf (STREAM, "\t.word\t%LL%d\n", VALUE);        \
 203               break;                                                    \
 204             default:                                                    \
 205               gcc_unreachable ();                                       \
 206             }                                                           \
 207         }                                                               \
 208       else if (TARGET_THUMB1)                                           \
 209         {                                                               \
 210           if (flag_pic || optimize_size)                                \
 211             {                                                           \
 212               switch (GET_MODE(body))                                   \
 213                 {                                                       \
 214                 case E_QImode:                                          \
 215                   asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",    \
 216                                VALUE, REL);                             \
 217                   break;                                                \
 218                 case E_HImode: /* TBH */                                        \
 219                   asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",   \
 220                                VALUE, REL);                             \
 221                   break;                                                \
 222                 case E_SImode:                                          \
 223                   asm_fprintf (STREAM, "\t.word\t%LL%d-%LL%d\n",        \
 224                                VALUE, REL);                             \
 225                   break;                                                \
 226                 default:                                                \
 227                   gcc_unreachable();                                    \
 228                 }                                                       \
 229             }                                                           \
 230           else                                                          \
 231             asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);          \
 232         }                                                               \
 233       else /* Thumb-2 */                                                \
 234         {                                                               \
 235           switch (GET_MODE(body))                                       \
 236             {                                                           \
 237             case E_QImode: /* TBB */                                    \
 238               asm_fprintf (STREAM, "\t.byte\t(%LL%d-%LL%d)/2\n",        \
 239                            VALUE, REL);                                 \
 240               break;                                                    \
 241             case E_HImode: /* TBH */                                    \
 242               asm_fprintf (STREAM, "\t.2byte\t(%LL%d-%LL%d)/2\n",       \
 243                            VALUE, REL);                                 \
 244               break;                                                    \
 245             case E_SImode:                                              \
 246               if (flag_pic)                                             \
 247                 asm_fprintf (STREAM, "\t.word\t%LL%d+1-%LL%d\n", VALUE, REL); \
 248               else                                                      \
 249                 asm_fprintf (STREAM, "\t.word\t%LL%d+1\n", VALUE);      \
 250               break;                                                    \
 251             default:                                                    \
 252               gcc_unreachable();                                        \
 253             }                                                           \
 254         }                                                               \
 255     }                                                                   \
 256   while (0)
 257
 258
 259 #undef  ASM_OUTPUT_ASCII
 260 #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN)  \
 261   output_ascii_pseudo_op (STREAM, (const unsigned char *) (PTR), LEN)
 262
 263 /* Output a gap.  In fact we fill it with nulls.  */
 264 #undef  ASM_OUTPUT_SKIP
 265 #define ASM_OUTPUT_SKIP(STREAM, NBYTES)         \
 266   fprintf (STREAM, "\t.space\t%d\n", (int) (NBYTES))
 267
 268 /* Align output to a power of two.  Horrible /bin/as.  */
 269 #ifndef ASM_OUTPUT_ALIGN
 270 #define ASM_OUTPUT_ALIGN(STREAM, POWER)                 \
 271   do                                                    \
 272     {                                                   \
 273       int amount = 1 << (POWER);                        \
 274                                                         \
 275       if (amount == 2)                                  \
 276         fprintf (STREAM, "\t.even\n");                  \
 277       else if (amount != 1)                             \
 278         fprintf (STREAM, "\t.align\t%d\n", amount - 4); \
 279     }                                                   \
 280   while (0)
 281 #endif
 282
 283 /* Output a common block.  */
 284 #ifndef ASM_OUTPUT_COMMON
 285 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED)  \
 286   do                                                    \
 287     {                                                   \
 288       fprintf (STREAM, "\t.comm\t");                    \
 289       assemble_name (STREAM, NAME);                     \
 290       asm_fprintf (STREAM, ", %d\t%@ %d\n",             \
 291                    (int)(ROUNDED), (int)(SIZE));        \
 292     }                                                   \
 293   while (0)
 294 #endif
 295
 296 /* Output a local common block.  /bin/as can't do this, so hack a
 297    `.space' into the bss segment.  Note that this is *bad* practice,
 298    which is guaranteed NOT to work since it doesn't define STATIC
 299    COMMON space but merely STATIC BSS space.  */
 300 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
 301 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN)             \
 302   do                                                                    \
 303     {                                                                   \
 304       switch_to_section (bss_section);                                  \
 305       ASM_OUTPUT_ALIGN (STREAM, floor_log2 (ALIGN / BITS_PER_UNIT));    \
 306       ASM_OUTPUT_LABEL (STREAM, NAME);                                  \
 307       fprintf (STREAM, "\t.space\t%d\n", (int)(SIZE));                  \
 308     }                                                                   \
 309   while (0)
 310 #endif
 311
 312 /* Output a zero-initialized block.  */
 313 #ifndef ASM_OUTPUT_ALIGNED_BSS
 314 #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGN) \
 315   asm_output_aligned_bss (STREAM, DECL, NAME, SIZE, ALIGN)
 316 #endif
 317
 318 #ifndef ASM_COMMENT_START
 319 #define ASM_COMMENT_START       "@"
 320 #endif
 321
 322 /* This works for GAS and some other assemblers.  */
 323 #define SET_ASM_OP              "\t.set\t"