gas/config/tc-ia64.h

   1 /* tc-ia64.h -- Header file for tc-ia64.c.
   2    Copyright 1998, 1999, 2000, 2001, 2002 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 #define MD_FLAGS_DEFAULT                EF_IA_64_BE
  32 #else
  33 #define md_number_to_chars              number_to_chars_littleendian
  34 #define TARGET_BYTES_BIG_ENDIAN         0
  35 #define MD_FLAGS_DEFAULT                EF_IA_64_ABI64
  36 #endif /* TE_HPUX */
  37
  38 /* We need to set the default object file format in ia64_init and not in
  39    md_begin.  This is because parse_args is called before md_begin, and we
  40    do not want md_begin to wipe out the flag settings set by options parsed in
  41    md_parse_args.  */
  42
  43 #define HOST_SPECIAL_INIT ia64_init
  44 extern void ia64_init PARAMS ((int, char **));
  45
  46 #define TARGET_FORMAT ia64_target_format()
  47 extern const char *ia64_target_format PARAMS ((void));
  48
  49 #define TARGET_ARCH                     bfd_arch_ia64
  50 #define DOUBLESLASH_LINE_COMMENTS       /* allow //-style comments */
  51
  52 #define NEED_LITERAL_POOL               /* need gp literal pool */
  53 #define RELOC_REQUIRES_SYMBOL
  54 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
  55 #define NEED_INDEX_OPERATOR             /* [ ] is index operator */
  56
  57 #define QUOTES_IN_INSN                  /* allow `string "foo;bar"' */
  58 #define LEX_AT          LEX_NAME        /* allow `@' inside name */
  59 #define LEX_QM          LEX_NAME        /* allow `?' inside name */
  60 #define LEX_HASH        LEX_END_NAME    /* allow `#' ending a name */
  61
  62 struct ia64_fix
  63   {
  64     int bigendian;                      /* byte order at fix location */
  65     enum ia64_opnd opnd;
  66   };
  67
  68 extern void ia64_do_align PARAMS((int n));
  69 extern void ia64_end_of_source PARAMS((void));
  70 extern void ia64_start_line PARAMS((void));
  71 extern int ia64_unrecognized_line PARAMS((int ch));
  72 extern void ia64_frob_label PARAMS((struct symbol *sym));
  73 extern void ia64_flush_pending_output PARAMS((void));
  74 extern int ia64_parse_name (char *name, expressionS *e);
  75 extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op,
  76                                       expressionS *r));
  77 extern void ia64_cons_align PARAMS((int));
  78 extern void ia64_flush_insns PARAMS((void));
  79 extern int ia64_fix_adjustable PARAMS((struct fix *fix));
  80 extern int ia64_force_relocation PARAMS((struct fix *));
  81 extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes,
  82                                        expressionS *exp));
  83 extern void ia64_validate_fix PARAMS ((struct fix *fix));
  84 extern char * ia64_canonicalize_symbol_name PARAMS ((char *));
  85 extern int ia64_elf_section_letter PARAMS ((int, char **));
  86 extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int));
  87 extern int ia64_elf_section_type PARAMS ((const char *, size_t len));
  88 extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec));
  89 extern void ia64_md_do_align PARAMS ((int, const char *, int, int));
  90 extern void ia64_handle_align PARAMS ((fragS *f));
  91 extern void ia64_after_parse_args PARAMS ((void));
  92
  93 #define md_end()                        ia64_end_of_source ()
  94 #define md_start_line_hook()            ia64_start_line ()
  95 #define tc_unrecognized_line(ch)        ia64_unrecognized_line (ch)
  96 #define tc_frob_label(s)                ia64_frob_label (s)
  97 #define md_flush_pending_output()       ia64_flush_pending_output ()
  98 #define md_parse_name(s,e,c)            ia64_parse_name (s, e)
  99 #define tc_canonicalize_symbol_name(s)  ia64_canonicalize_symbol_name (s)
 100 #define md_optimize_expr(l,o,r)         ia64_optimize_expr (l, o, r)
 101 #define md_cons_align(n)                ia64_cons_align (n)
 102 #define TC_FORCE_RELOCATION(f)          ia64_force_relocation (f)
 103 #define tc_fix_adjustable(f)            ia64_fix_adjustable (f)
 104 #define MD_APPLY_SYM_VALUE(FIX)         0
 105 #define md_convert_frag(b,s,f)          as_fatal ("ia64_convert_frag")
 106 #define md_create_long_jump(p,f,t,fr,s) as_fatal ("ia64_create_long_jump")
 107 #define md_create_short_jump(p,f,t,fr,s) \
 108                                         as_fatal ("ia64_create_short_jump")
 109 #define md_estimate_size_before_relax(f,s) \
 110                         (as_fatal ("ia64_estimate_size_before_relax"), 1)
 111 #define md_elf_section_letter           ia64_elf_section_letter
 112 #define md_elf_section_flags            ia64_elf_section_flags
 113 #define TC_FIX_TYPE                     struct ia64_fix
 114 #define TC_INIT_FIX_DATA(f)             { f->tc_fix_data.opnd = 0; }
 115 #define TC_CONS_FIX_NEW(f,o,l,e)        ia64_cons_fix_new (f, o, l, e)
 116 #define TC_VALIDATE_FIX(fix,seg,skip)   ia64_validate_fix (fix)
 117 #define MD_PCREL_FROM_SECTION(fix,sec)  ia64_pcrel_from_section (fix, sec)
 118 #define md_do_align(n,f,l,m,j)          ia64_md_do_align (n,f,l,m)
 119 #define HANDLE_ALIGN(f)                 ia64_handle_align (f)
 120 #define md_elf_section_type(str,len)    ia64_elf_section_type (str, len)
 121 #define md_after_parse_args()           ia64_after_parse_args ()
 122
 123 #define MAX_MEM_FOR_RS_ALIGN_CODE  (15 + 16)
 124
 125 #define WORKING_DOT_WORD        /* don't do broken word processing for now */
 126
 127 #define ELF_TC_SPECIAL_SECTIONS                                            \
 128 { ".sbss",      SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, \
 129 { ".sdata",     SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT },
 130
 131 #define DWARF2_LINE_MIN_INSN_LENGTH 1   /* so slot-multipliers can be 1 */
 132
 133 /* This is the information required for unwind records in an ia64
 134    object file. This is required by GAS and the compiler runtime.  */
 135
 136 /* These are the starting point masks for the various types of
 137    unwind records. To create a record of type R3 for instance, one
 138    starts by using the value UNW_R3 and or-ing in any other required values.
 139    These values are also unique (in context), so they can be used to identify
 140    the various record types as well. UNW_Bx and some UNW_Px do have the
 141    same value, but Px can only occur in a prologue context, and Bx in
 142    a body context.  */
 143
 144 #define UNW_R1  0x00
 145 #define UNW_R2  0x40
 146 #define UNW_R3  0x60
 147 #define UNW_P1  0x80
 148 #define UNW_P2  0xA0
 149 #define UNW_P3  0xB0
 150 #define UNW_P4  0xB8
 151 #define UNW_P5  0xB9
 152 #define UNW_P6  0xC0
 153 #define UNW_P7  0xE0
 154 #define UNW_P8  0xF0
 155 #define UNW_P9  0xF1
 156 #define UNW_P10 0xFF
 157 #define UNW_X1  0xF9
 158 #define UNW_X2  0xFA
 159 #define UNW_X3  0xFB
 160 #define UNW_X4  0xFC
 161 #define UNW_B1  0x80
 162 #define UNW_B2  0xC0
 163 #define UNW_B3  0xE0
 164 #define UNW_B4  0xF0
 165
 166 /* These are all the various types of unwind records.  */
 167
 168 typedef enum
 169 {
 170   prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
 171   rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
 172   pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
 173   fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
 174   unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
 175   lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
 176   priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
 177   priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
 178   bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
 179   rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
 180   spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
 181   spill_reg_p, unwabi
 182 } unw_record_type;
 183
 184 /* These structures declare the fields that can be used in each of the
 185    4 record formats, R, P, B and X.  */
 186
 187 typedef struct unw_r_record
 188 {
 189   unsigned long rlen;
 190   unsigned short grmask;
 191   unsigned short grsave;
 192   /* masks to represent the union of save.g, save.f, save.b, and
 193      save.gf: */
 194   unsigned long imask_size;
 195   struct
 196   {
 197     unsigned char *i;
 198     unsigned long fr_mem;
 199     unsigned char gr_mem;
 200     unsigned char br_mem;
 201   } mask;
 202 } unw_r_record;
 203
 204 typedef struct unw_p_record
 205 {
 206   void *imask;
 207   unsigned long t;
 208   unsigned long size;
 209   unsigned long spoff;
 210   unsigned long br;
 211   unsigned long pspoff;
 212   unsigned short gr;
 213   unsigned short rmask;
 214   unsigned short grmask;
 215   unsigned long frmask;
 216   unsigned short brmask;
 217   unsigned char abi;
 218   unsigned char context;
 219 } unw_p_record;
 220
 221 typedef struct unw_b_record
 222 {
 223   unsigned long t;
 224   unsigned long label;
 225   unsigned short ecount;
 226 } unw_b_record;
 227
 228 typedef struct unw_x_record
 229 {
 230   unsigned long t;
 231   unsigned long spoff;
 232   unsigned long pspoff;
 233   unsigned short reg;
 234   unsigned short treg;
 235   unsigned short qp;
 236   unsigned short ab;    /* Value of the AB field..  */
 237   unsigned short xy;    /* Value of the XY field..  */
 238 } unw_x_record;
 239
 240 /* This structure is used to determine the specific record type and
 241    its fields.  */
 242 typedef struct unwind_record
 243 {
 244   unw_record_type type;
 245   union {
 246     unw_r_record r;
 247     unw_p_record p;
 248     unw_b_record b;
 249     unw_x_record x;
 250   } record;
 251 } unwind_record;
 252
 253 /* This expression evaluates to true if the relocation is for a local
 254    object for which we still want to do the relocation at runtime.
 255    False if we are willing to perform this relocation while building
 256    the .o file.  */
 257
 258 /* If the reloc type is BFD_RELOC_UNUSED, then this is for a TAG13/TAG13b field
 259    which has no external reloc, so we must resolve the value now.  */
 260
 261 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 262   ((FIX)->fx_r_type != BFD_RELOC_UNUSED                 \
 263    && (!(FIX)->fx_pcrel                                 \
 264        || (FIX)->fx_plt                                 \
 265        || TC_FORCE_RELOCATION (FIX)))