gas/config/tc-ia64.h

   1 /* tc-ia64.h -- Header file for tc-ia64.c.
   2    Copyright (C) 1998, 1999, 2000 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 2, 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, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, 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 md_number_to_chars              number_to_chars_bigendian
  30 #define TARGET_BYTES_BIG_ENDIAN         1
  31 #else
  32 #define md_number_to_chars              number_to_chars_littleendian
  33 #define TARGET_BYTES_BIG_ENDIAN         0
  34 #endif /* TE_HPUX */
  35
  36 /* We need to set the default object file format in ia64_init and not in
  37    md_begin.  This is because parse_args is called before md_begin, and we
  38    do not want md_begin to wipe out the flag settings set by options parsed in
  39    md_parse_args.  */
  40
  41 #define HOST_SPECIAL_INIT ia64_init
  42
  43 #define TARGET_FORMAT ia64_target_format()
  44 extern const char *ia64_target_format PARAMS ((void));
  45
  46 #define TARGET_ARCH                     bfd_arch_ia64
  47 #define DOUBLESLASH_LINE_COMMENTS       /* allow //-style comments */
  48 #define TC_HANDLES_FX_DONE
  49
  50 #define NEED_LITERAL_POOL               /* need gp literal pool */
  51 #define RELOC_REQUIRES_SYMBOL
  52 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
  53 #define NEED_INDEX_OPERATOR             /* [ ] is index operator */
  54
  55 #define QUOTES_IN_INSN                  /* allow `string "foo;bar"' */
  56 #define LEX_AT          LEX_NAME        /* allow `@' inside name */
  57 #define LEX_QM          LEX_NAME        /* allow `?' inside name */
  58 #define LEX_HASH        LEX_END_NAME    /* allow `#' ending a name */
  59
  60 struct ia64_fix
  61   {
  62     int bigendian;                      /* byte order at fix location */
  63     enum ia64_opnd opnd;
  64   };
  65
  66 extern void ia64_do_align PARAMS((int n));
  67 extern void ia64_end_of_source PARAMS((void));
  68 extern void ia64_start_line PARAMS((void));
  69 extern int ia64_unrecognized_line PARAMS((int ch));
  70 extern void ia64_frob_label PARAMS((struct symbol *sym));
  71 extern void ia64_flush_pending_output PARAMS((void));
  72 extern int ia64_parse_name (char *name, expressionS *e);
  73 extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op,
  74                                       expressionS *r));
  75 extern void ia64_cons_align PARAMS((int));
  76 extern void ia64_flush_insns PARAMS((void));
  77 extern int ia64_fix_adjustable PARAMS((struct fix *fix));
  78 extern int ia64_force_relocation PARAMS((struct fix *));
  79 extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes,
  80                                        expressionS *exp));
  81 extern void ia64_validate_fix PARAMS ((struct fix *fix));
  82 extern char * ia64_canonicalize_symbol_name PARAMS ((char *));
  83 extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int));
  84 extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec));
  85 extern int ia64_md_do_align PARAMS ((int, const char *, int, int));
  86
  87 #define md_end()                        ia64_end_of_source ()
  88 #define md_start_line_hook()            ia64_start_line ()
  89 #define tc_unrecognized_line(ch)        ia64_unrecognized_line (ch)
  90 #define tc_frob_label(s)                ia64_frob_label (s)
  91 #define md_flush_pending_output()       ia64_flush_pending_output ()
  92 #define md_parse_name(s,e)              ia64_parse_name (s, e)
  93 #define tc_canonicalize_symbol_name(s)  ia64_canonicalize_symbol_name (s)
  94 #define md_optimize_expr(l,o,r)         ia64_optimize_expr (l, o, r)
  95 #define md_cons_align(n)                ia64_cons_align (n)
  96 #define TC_FORCE_RELOCATION(f)          ia64_force_relocation (f)
  97 #define tc_fix_adjustable(f)            ia64_fix_adjustable (f)
  98 #define md_convert_frag(b,s,f)          as_fatal ("ia64_convert_frag")
  99 #define md_create_long_jump(p,f,t,fr,s) as_fatal("ia64_create_long_jump")
 100 #define md_create_short_jump(p,f,t,fr,s) \
 101                                         as_fatal("ia64_create_short_jump")
 102 #define md_estimate_size_before_relax(f,s) \
 103                         (as_fatal ("ia64_estimate_size_before_relax"), 1)
 104 #define md_elf_section_flags            ia64_elf_section_flags
 105 #define TC_FIX_TYPE                     struct ia64_fix
 106 #define TC_INIT_FIX_DATA(f)             { f->tc_fix_data.opnd = 0; }
 107 #define TC_CONS_FIX_NEW(f,o,l,e)        ia64_cons_fix_new (f, o, l, e)
 108 #define TC_VALIDATE_FIX(fix,seg,skip)   ia64_validate_fix (fix)
 109 #define MD_PCREL_FROM_SECTION(fix,sec)  ia64_pcrel_from_section (fix, sec)
 110 #define md_do_align(n,f,l,m,j)          if (ia64_md_do_align (n,f,l,m)) goto j
 111
 112 /* Call md_apply_fix3 with segment instead of md_apply_fix.  */
 113 #define MD_APPLY_FIX3
 114
 115 #define WORKING_DOT_WORD        /* don't do broken word processing for now */
 116
 117 #define ELF_TC_SPECIAL_SECTIONS                                            \
 118 { ".sbss",      SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, \
 119 { ".sdata",     SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, \
 120 { ".IA_64.unwind",      SHT_IA_64_UNWIND,       SHF_ALLOC }, \
 121 { ".IA_64.unwind_info", SHT_PROGBITS,           SHF_ALLOC },
 122
 123 #define DWARF2_LINE_MIN_INSN_LENGTH 1   /* so slot-multipliers can be 1 */
 124
 125 /* This is the information required for unwind records in an ia64
 126    object file. This is required by GAS and the compiler runtime.  */
 127
 128 /* These are the starting point masks for the various types of
 129    unwind records. To create a record of type R3 for instance, one
 130    starts by using the value UNW_R3 and or-ing in any other required values.
 131    These values are also unique (in context), so they can be used to identify
 132    the various record types as well. UNW_Bx and some UNW_Px do have the
 133    same value, but Px can only occur in a prologue context, and Bx in
 134    a body context.  */
 135
 136 #define UNW_R1  0x00
 137 #define UNW_R2  0x40
 138 #define UNW_R3  0x60
 139 #define UNW_P1  0x80
 140 #define UNW_P2  0xA0
 141 #define UNW_P3  0xB0
 142 #define UNW_P4  0xB8
 143 #define UNW_P5  0xB9
 144 #define UNW_P6  0xC0
 145 #define UNW_P7  0xE0
 146 #define UNW_P8  0xF0
 147 #define UNW_P9  0xF1
 148 #define UNW_P10 0xFF
 149 #define UNW_X1  0xF9
 150 #define UNW_X2  0xFA
 151 #define UNW_X3  0xFB
 152 #define UNW_X4  0xFC
 153 #define UNW_B1  0x80
 154 #define UNW_B2  0xC0
 155 #define UNW_B3  0xE0
 156 #define UNW_B4  0xF0
 157
 158 /* These are all the various types of unwind records.  */
 159
 160 typedef enum
 161 {
 162   prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
 163   rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
 164   pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
 165   fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
 166   unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
 167   lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
 168   priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
 169   priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
 170   bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
 171   rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
 172   spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
 173   spill_reg_p, unwabi
 174 } unw_record_type;
 175
 176 /* These structures declare the fields that can be used in each of the
 177    4 record formats, R, P, B and X.  */
 178
 179 typedef struct unw_r_record
 180 {
 181   unsigned long rlen;
 182   unsigned short grmask;
 183   unsigned short grsave;
 184   /* masks to represent the union of save.g, save.f, save.b, and
 185      save.gf: */
 186   unsigned long imask_size;
 187   struct
 188   {
 189     unsigned char *i;
 190     unsigned long fr_mem;
 191     unsigned char gr_mem;
 192     unsigned char br_mem;
 193   } mask;
 194 } unw_r_record;
 195
 196 typedef struct unw_p_record
 197 {
 198   void *imask;
 199   unsigned long t;
 200   unsigned long size;
 201   unsigned long spoff;
 202   unsigned long br;
 203   unsigned long pspoff;
 204   unsigned short gr;
 205   unsigned short rmask;
 206   unsigned short grmask;
 207   unsigned long frmask;
 208   unsigned short brmask;
 209   unsigned char abi;
 210   unsigned char context;
 211 } unw_p_record;
 212
 213 typedef struct unw_b_record
 214 {
 215   unsigned long t;
 216   unsigned long label;
 217   unsigned short ecount;
 218 } unw_b_record;
 219
 220 typedef struct unw_x_record
 221 {
 222   unsigned long t;
 223   unsigned long spoff;
 224   unsigned long pspoff;
 225   unsigned short reg;
 226   unsigned short treg;
 227   unsigned short qp;
 228   unsigned short ab;    /* Value of the AB field..  */
 229   unsigned short xy;    /* Value of the XY field..  */
 230 } unw_x_record;
 231
 232 /* This structure is used to determine the specific record type and
 233    its fields.  */
 234 typedef struct unwind_record
 235 {
 236   unw_record_type type;
 237   union {
 238     unw_r_record r;
 239     unw_p_record p;
 240     unw_b_record b;
 241     unw_x_record x;
 242   } record;
 243 } unwind_record;