gas/config/tc-ia64.h

   1 /* tc-ia64.h -- Header file for tc-ia64.c.
   2    Copyright (C) 1998-2021 Free Software Foundation, Inc.
   3    Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
   4
   5    This file is part of GAS, the GNU Assembler.
   6
   7    GAS 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 3, or (at your option)
  10    any later version.
  11
  12    GAS 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 GAS; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 51 Franklin Street - Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #include "opcode/ia64.h"
  23 #include "elf/ia64.h"
  24
  25 #define TC_IA64
  26
  27 /* Linux is little endian by default.  HPUX is big endian by default.  */
  28 #ifdef TE_HPUX
  29 #define TARGET_BYTES_BIG_ENDIAN         1
  30 #define MD_FLAGS_DEFAULT                EF_IA_64_BE
  31 #else
  32 #define TARGET_BYTES_BIG_ENDIAN         0
  33 #define MD_FLAGS_DEFAULT                EF_IA_64_ABI64
  34 #endif /* TE_HPUX */
  35
  36 extern void (*ia64_number_to_chars) (char *, valueT, int);
  37 #define md_number_to_chars              (*ia64_number_to_chars)
  38
  39 extern void ia64_elf_section_change_hook (void);
  40 #define md_elf_section_change_hook      ia64_elf_section_change_hook
  41
  42 /* We record the endian for this section. 0 means default, 1 means
  43    big endian and 2 means little endian.  */
  44 struct ia64_segment_info_type
  45 {
  46   unsigned int endian : 2;
  47 };
  48
  49 #define TC_SEGMENT_INFO_TYPE            struct ia64_segment_info_type
  50
  51 extern void ia64_adjust_symtab (void);
  52 #define tc_adjust_symtab()      ia64_adjust_symtab ()
  53
  54 extern void ia64_frob_file (void);
  55 #define tc_frob_file()          ia64_frob_file ()
  56
  57 /* We need to set the default object file format in ia64_init and not in
  58    md_begin.  This is because parse_args is called before md_begin, and we
  59    do not want md_begin to wipe out the flag settings set by options parsed in
  60    md_parse_args.  */
  61
  62 #define HOST_SPECIAL_INIT ia64_init
  63 extern void ia64_init (int, char **);
  64
  65 #define TARGET_FORMAT ia64_target_format()
  66 extern const char *ia64_target_format (void);
  67
  68 #define TARGET_ARCH                     bfd_arch_ia64
  69 #define DOUBLESLASH_LINE_COMMENTS       /* allow //-style comments */
  70
  71 #define NEED_LITERAL_POOL               /* need gp literal pool */
  72 #define RELOC_REQUIRES_SYMBOL
  73 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
  74 #define NEED_INDEX_OPERATOR             /* [ ] is index operator */
  75
  76 #define QUOTES_IN_INSN                  /* allow `string "foo;bar"' */
  77 #define LEX_AT          (LEX_NAME|LEX_BEGIN_NAME) /* allow `@' inside name */
  78 #define LEX_QM          (LEX_NAME|LEX_BEGIN_NAME) /* allow `?' inside name */
  79 #define LEX_HASH        LEX_END_NAME    /* allow `#' ending a name */
  80
  81 #define TC_PREDICATE_START_CHAR '('
  82 #define TC_PREDICATE_END_CHAR ')'
  83
  84 extern const char ia64_symbol_chars[];
  85 #define tc_symbol_chars ia64_symbol_chars
  86
  87 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  88
  89 struct ia64_fix
  90   {
  91     int bigendian;                      /* byte order at fix location */
  92     enum ia64_opnd opnd;
  93   };
  94
  95 extern void ia64_end_of_source (void);
  96 extern void ia64_start_line (void);
  97 extern int ia64_unrecognized_line (int);
  98 extern void ia64_frob_label (struct symbol *);
  99 #ifdef TE_HPUX
 100 extern int ia64_frob_symbol (struct symbol *);
 101 #endif
 102 extern void ia64_flush_pending_output (void);
 103 extern int ia64_parse_name (char *, expressionS *, char *);
 104 extern int ia64_optimize_expr (expressionS *, operatorT, expressionS *);
 105 extern void ia64_cons_align (int);
 106 extern void ia64_flush_insns (void);
 107 extern int ia64_fix_adjustable (struct fix *);
 108 extern int ia64_force_relocation (struct fix *);
 109 extern void ia64_cons_fix_new (fragS *, int, int, expressionS *,
 110                                bfd_reloc_code_real_type);
 111 extern void ia64_validate_fix (struct fix *);
 112 extern char * ia64_canonicalize_symbol_name (char *);
 113 extern bfd_vma ia64_elf_section_letter (int, const char **);
 114 extern flagword ia64_elf_section_flags (flagword, bfd_vma, int);
 115 extern int ia64_elf_section_type (const char *, size_t);
 116 extern long ia64_pcrel_from_section (struct fix *, segT);
 117 extern void ia64_md_do_align (int, const char *, int, int);
 118 extern void ia64_handle_align (fragS *);
 119 extern void ia64_after_parse_args (void);
 120 extern void ia64_dwarf2_emit_offset (symbolS *, unsigned int);
 121 extern void ia64_check_label (symbolS *);
 122 extern int ia64_estimate_size_before_relax (fragS *, asection *);
 123 extern void ia64_convert_frag (fragS *);
 124
 125 #define md_end()                        ia64_end_of_source ()
 126 #define md_start_line_hook()            ia64_start_line ()
 127 #define tc_unrecognized_line(ch)        ia64_unrecognized_line (ch)
 128 #define tc_frob_label(s)                ia64_frob_label (s)
 129 #ifdef TE_HPUX
 130 #define tc_frob_symbol(s,p)             p |= ia64_frob_symbol (s)
 131 #endif /* TE_HPUX */
 132 #define md_flush_pending_output()       ia64_flush_pending_output ()
 133 #define md_parse_name(s,e,m,c)          ia64_parse_name (s, e, c)
 134 #define md_register_arithmetic          0
 135 #define tc_canonicalize_symbol_name(s)  ia64_canonicalize_symbol_name (s)
 136 #define tc_canonicalize_section_name(s) ia64_canonicalize_symbol_name (s)
 137 #define md_optimize_expr(l,o,r)         ia64_optimize_expr (l, o, r)
 138 #define md_cons_align(n)                ia64_cons_align (n)
 139 #define TC_FORCE_RELOCATION(f)          ia64_force_relocation (f)
 140 #define tc_fix_adjustable(f)            ia64_fix_adjustable (f)
 141 #define MD_APPLY_SYM_VALUE(FIX)         0
 142 #define md_convert_frag(b,s,f)          ia64_convert_frag (f)
 143 #define md_create_long_jump(p,f,t,fr,s) as_fatal ("ia64_create_long_jump")
 144 #define md_create_short_jump(p,f,t,fr,s) \
 145                                         as_fatal ("ia64_create_short_jump")
 146 #define md_estimate_size_before_relax(f,s) \
 147                                         ia64_estimate_size_before_relax(f,s)
 148 #define md_elf_section_letter           ia64_elf_section_letter
 149 #define md_elf_section_flags            ia64_elf_section_flags
 150 #define TC_FIX_TYPE                     struct ia64_fix
 151 #define TC_INIT_FIX_DATA(f)             { f->tc_fix_data.opnd = 0; }
 152 #define TC_CONS_FIX_NEW(f,o,l,e,r)      ia64_cons_fix_new (f, o, l, e, r)
 153 #define TC_VALIDATE_FIX(fix,seg,skip)   ia64_validate_fix (fix)
 154 #define MD_PCREL_FROM_SECTION(fix,sec)  ia64_pcrel_from_section (fix, sec)
 155 #define md_section_align(seg,size)      (size)
 156 #define md_do_align(n,f,l,m,j)          ia64_md_do_align (n,f,l,m)
 157 #define HANDLE_ALIGN(f)                 ia64_handle_align (f)
 158 #define md_elf_section_type(str,len)    ia64_elf_section_type (str, len)
 159 #define md_after_parse_args()           ia64_after_parse_args ()
 160 #define TC_DWARF2_EMIT_OFFSET           ia64_dwarf2_emit_offset
 161 #define tc_check_label(l)               ia64_check_label (l)
 162 #ifdef TE_VMS
 163 #define tc_init_after_args() ia64_vms_note ()
 164 void ia64_vms_note (void);
 165 #endif
 166
 167 /* Record if an alignment frag should end with a stop bit.  */
 168 #define TC_FRAG_TYPE                    int
 169 #define TC_FRAG_INIT(FRAGP, MAX_BYTES)  do {(FRAGP)->tc_frag_data = 0;}while (0)
 170
 171 /* Give an error if a frag containing code is not aligned to a 16 byte
 172    boundary.  */
 173 #define md_frag_check(FRAGP) \
 174   if ((FRAGP)->has_code                                                 \
 175       && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 15) != 0)        \
 176      as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line,                  \
 177                    _("instruction address is not a multiple of 16"));
 178
 179 #define MAX_MEM_FOR_RS_ALIGN_CODE  (15 + 16)
 180
 181 #define WORKING_DOT_WORD        /* don't do broken word processing for now */
 182
 183 #define DWARF2_LINE_MIN_INSN_LENGTH 1   /* so slot-multipliers can be 1 */
 184
 185 /* This is the information required for unwind records in an ia64
 186    object file. This is required by GAS and the compiler runtime.  */
 187
 188 /* These are the starting point masks for the various types of
 189    unwind records. To create a record of type R3 for instance, one
 190    starts by using the value UNW_R3 and or-ing in any other required values.
 191    These values are also unique (in context), so they can be used to identify
 192    the various record types as well. UNW_Bx and some UNW_Px do have the
 193    same value, but Px can only occur in a prologue context, and Bx in
 194    a body context.  */
 195
 196 #define UNW_R1  0x00
 197 #define UNW_R2  0x40
 198 #define UNW_R3  0x60
 199 #define UNW_P1  0x80
 200 #define UNW_P2  0xA0
 201 #define UNW_P3  0xB0
 202 #define UNW_P4  0xB8
 203 #define UNW_P5  0xB9
 204 #define UNW_P6  0xC0
 205 #define UNW_P7  0xE0
 206 #define UNW_P8  0xF0
 207 #define UNW_P9  0xF1
 208 #define UNW_P10 0xFF
 209 #define UNW_X1  0xF9
 210 #define UNW_X2  0xFA
 211 #define UNW_X3  0xFB
 212 #define UNW_X4  0xFC
 213 #define UNW_B1  0x80
 214 #define UNW_B2  0xC0
 215 #define UNW_B3  0xE0
 216 #define UNW_B4  0xF0
 217
 218 /* These are all the various types of unwind records.  */
 219
 220 typedef enum
 221 {
 222   prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
 223   rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
 224   pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
 225   fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
 226   unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
 227   lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
 228   priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
 229   priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
 230   bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
 231   rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
 232   spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
 233   spill_reg_p, unwabi, endp
 234 } unw_record_type;
 235
 236 /* These structures declare the fields that can be used in each of the
 237    4 record formats, R, P, B and X.  */
 238
 239 typedef struct unw_r_record
 240 {
 241   unsigned long rlen;
 242   unsigned short grmask;
 243   unsigned short grsave;
 244   /* masks to represent the union of save.g, save.f, save.b, and
 245      save.gf: */
 246   unsigned long imask_size;
 247   struct
 248   {
 249     unsigned char *i;
 250     unsigned int fr_mem;
 251     unsigned char gr_mem;
 252     unsigned char br_mem;
 253   } mask;
 254 } unw_r_record;
 255
 256 typedef struct unw_p_record
 257 {
 258   struct unw_rec_list *next;
 259   unsigned long t;
 260   unsigned long size;
 261   union
 262   {
 263     unsigned long sp;
 264     unsigned long psp;
 265   } off;
 266   union
 267   {
 268     unsigned short gr;
 269     unsigned short br;
 270   } r;
 271   unsigned char grmask;
 272   unsigned char brmask;
 273   unsigned int frmask;
 274   unsigned char abi;
 275   unsigned char context;
 276 } unw_p_record;
 277
 278 typedef struct unw_b_record
 279 {
 280   unsigned long t;
 281   unsigned long label;
 282   unsigned short ecount;
 283 } unw_b_record;
 284
 285 typedef struct unw_x_record
 286 {
 287   unsigned long t;
 288   union
 289   {
 290     unsigned long spoff;
 291     unsigned long pspoff;
 292     unsigned int reg;
 293   } where;
 294   unsigned short reg;
 295   unsigned short qp;
 296   unsigned short ab;    /* Value of the AB field..  */
 297   unsigned short xy;    /* Value of the XY field..  */
 298 } unw_x_record;
 299
 300 /* This structure is used to determine the specific record type and
 301    its fields.  */
 302 typedef struct unwind_record
 303 {
 304   unw_record_type type;
 305   union {
 306     unw_r_record r;
 307     unw_p_record p;
 308     unw_b_record b;
 309     unw_x_record x;
 310   } record;
 311 } unwind_record;
 312
 313 /* This expression evaluates to true if the relocation is for a local
 314    object for which we still want to do the relocation at runtime.
 315    False if we are willing to perform this relocation while building
 316    the .o file.  */
 317
 318 /* If the reloc type is BFD_RELOC_UNUSED, then this is for a TAG13/TAG13b field
 319    which has no external reloc, so we must resolve the value now.  */
 320
 321 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 322   ((FIX)->fx_r_type != BFD_RELOC_UNUSED                 \
 323    && (GENERIC_FORCE_RELOCATION_LOCAL (FIX)             \
 324        || (FIX)->fx_r_type == BFD_RELOC_IA64_PLTOFF22))
 325
 326 /* VMS backtraces expect dwarf version 3.  */
 327 #ifdef TE_VMS
 328 #define DWARF2_VERSION      (dwarf_level < 3 ? 3  : dwarf_level)
 329 #endif
 330
 331 #define md_single_noop_insn "nop 0"