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 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) PARAMS ((char *, valueT, int));
  37 #define md_number_to_chars              (*ia64_number_to_chars)
  38
  39 extern void ia64_elf_section_change_hook PARAMS ((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 /* We need to set the default object file format in ia64_init and not in
  52    md_begin.  This is because parse_args is called before md_begin, and we
  53    do not want md_begin to wipe out the flag settings set by options parsed in
  54    md_parse_args.  */
  55
  56 #define HOST_SPECIAL_INIT ia64_init
  57 extern void ia64_init PARAMS ((int, char **));
  58
  59 #define TARGET_FORMAT ia64_target_format()
  60 extern const char *ia64_target_format PARAMS ((void));
  61
  62 #define TARGET_ARCH                     bfd_arch_ia64
  63 #define DOUBLESLASH_LINE_COMMENTS       /* allow //-style comments */
  64
  65 #define NEED_LITERAL_POOL               /* need gp literal pool */
  66 #define RELOC_REQUIRES_SYMBOL
  67 #define DIFF_EXPR_OK   /* foo-. gets turned into PC relative relocs */
  68 #define NEED_INDEX_OPERATOR             /* [ ] is index operator */
  69
  70 #define QUOTES_IN_INSN                  /* allow `string "foo;bar"' */
  71 #define LEX_AT          LEX_NAME        /* allow `@' inside name */
  72 #define LEX_QM          LEX_NAME        /* allow `?' inside name */
  73 #define LEX_HASH        LEX_END_NAME    /* allow `#' ending a name */
  74
  75 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
  76
  77 struct ia64_fix
  78   {
  79     int bigendian;                      /* byte order at fix location */
  80     enum ia64_opnd opnd;
  81   };
  82
  83 extern void ia64_do_align PARAMS((int n));
  84 extern void ia64_end_of_source PARAMS((void));
  85 extern void ia64_start_line PARAMS((void));
  86 extern int ia64_unrecognized_line PARAMS((int ch));
  87 extern void ia64_frob_label PARAMS((struct symbol *sym));
  88 extern void ia64_flush_pending_output PARAMS((void));
  89 extern int ia64_parse_name (char *name, expressionS *e);
  90 extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op,
  91                                       expressionS *r));
  92 extern void ia64_cons_align PARAMS((int));
  93 extern void ia64_flush_insns PARAMS((void));
  94 extern int ia64_fix_adjustable PARAMS((struct fix *fix));
  95 extern int ia64_force_relocation PARAMS((struct fix *));
  96 extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes,
  97                                        expressionS *exp));
  98 extern void ia64_validate_fix PARAMS ((struct fix *fix));
  99 extern char * ia64_canonicalize_symbol_name PARAMS ((char *));
 100 extern int ia64_elf_section_letter PARAMS ((int, char **));
 101 extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int));
 102 extern int ia64_elf_section_type PARAMS ((const char *, size_t len));
 103 extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec));
 104 extern void ia64_md_do_align PARAMS ((int, const char *, int, int));
 105 extern void ia64_handle_align PARAMS ((fragS *f));
 106 extern void ia64_after_parse_args PARAMS ((void));
 107 extern void ia64_dwarf2_emit_offset PARAMS ((symbolS *, unsigned int));
 108 extern void ia64_check_label PARAMS ((symbolS *));
 109
 110 #define md_end()                        ia64_end_of_source ()
 111 #define md_start_line_hook()            ia64_start_line ()
 112 #define tc_unrecognized_line(ch)        ia64_unrecognized_line (ch)
 113 #define tc_frob_label(s)                ia64_frob_label (s)
 114 #define md_flush_pending_output()       ia64_flush_pending_output ()
 115 #define md_parse_name(s,e,c)            ia64_parse_name (s, e)
 116 #define tc_canonicalize_symbol_name(s)  ia64_canonicalize_symbol_name (s)
 117 #define tc_canonicalize_section_name(s) ia64_canonicalize_symbol_name (s)
 118 #define md_optimize_expr(l,o,r)         ia64_optimize_expr (l, o, r)
 119 #define md_cons_align(n)                ia64_cons_align (n)
 120 #define TC_FORCE_RELOCATION(f)          ia64_force_relocation (f)
 121 #define tc_fix_adjustable(f)            ia64_fix_adjustable (f)
 122 #define MD_APPLY_SYM_VALUE(FIX)         0
 123 #define md_convert_frag(b,s,f)          as_fatal ("ia64_convert_frag")
 124 #define md_create_long_jump(p,f,t,fr,s) as_fatal ("ia64_create_long_jump")
 125 #define md_create_short_jump(p,f,t,fr,s) \
 126                                         as_fatal ("ia64_create_short_jump")
 127 #define md_estimate_size_before_relax(f,s) \
 128                         (as_fatal ("ia64_estimate_size_before_relax"), 1)
 129 #define md_elf_section_letter           ia64_elf_section_letter
 130 #define md_elf_section_flags            ia64_elf_section_flags
 131 #define TC_FIX_TYPE                     struct ia64_fix
 132 #define TC_INIT_FIX_DATA(f)             { f->tc_fix_data.opnd = 0; }
 133 #define TC_CONS_FIX_NEW(f,o,l,e)        ia64_cons_fix_new (f, o, l, e)
 134 #define TC_VALIDATE_FIX(fix,seg,skip)   ia64_validate_fix (fix)
 135 #define MD_PCREL_FROM_SECTION(fix,sec)  ia64_pcrel_from_section (fix, sec)
 136 #define md_section_align(seg,size)      (size)
 137 #define md_do_align(n,f,l,m,j)          ia64_md_do_align (n,f,l,m)
 138 #define HANDLE_ALIGN(f)                 ia64_handle_align (f)
 139 #define md_elf_section_type(str,len)    ia64_elf_section_type (str, len)
 140 #define md_after_parse_args()           ia64_after_parse_args ()
 141 #define TC_DWARF2_EMIT_OFFSET           ia64_dwarf2_emit_offset
 142 #define tc_check_label(l)               ia64_check_label (l)
 143
 144 #define MAX_MEM_FOR_RS_ALIGN_CODE  (15 + 16)
 145
 146 #define WORKING_DOT_WORD        /* don't do broken word processing for now */
 147
 148 #define ELF_TC_SPECIAL_SECTIONS                                            \
 149 { ".sbss",      SHT_NOBITS,     SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, \
 150 { ".sdata",     SHT_PROGBITS,   SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT },
 151
 152 #define DWARF2_LINE_MIN_INSN_LENGTH 1   /* so slot-multipliers can be 1 */
 153
 154 /* This is the information required for unwind records in an ia64
 155    object file. This is required by GAS and the compiler runtime.  */
 156
 157 /* These are the starting point masks for the various types of
 158    unwind records. To create a record of type R3 for instance, one
 159    starts by using the value UNW_R3 and or-ing in any other required values.
 160    These values are also unique (in context), so they can be used to identify
 161    the various record types as well. UNW_Bx and some UNW_Px do have the
 162    same value, but Px can only occur in a prologue context, and Bx in
 163    a body context.  */
 164
 165 #define UNW_R1  0x00
 166 #define UNW_R2  0x40
 167 #define UNW_R3  0x60
 168 #define UNW_P1  0x80
 169 #define UNW_P2  0xA0
 170 #define UNW_P3  0xB0
 171 #define UNW_P4  0xB8
 172 #define UNW_P5  0xB9
 173 #define UNW_P6  0xC0
 174 #define UNW_P7  0xE0
 175 #define UNW_P8  0xF0
 176 #define UNW_P9  0xF1
 177 #define UNW_P10 0xFF
 178 #define UNW_X1  0xF9
 179 #define UNW_X2  0xFA
 180 #define UNW_X3  0xFB
 181 #define UNW_X4  0xFC
 182 #define UNW_B1  0x80
 183 #define UNW_B2  0xC0
 184 #define UNW_B3  0xE0
 185 #define UNW_B4  0xF0
 186
 187 /* These are all the various types of unwind records.  */
 188
 189 typedef enum
 190 {
 191   prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel,
 192   rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel,
 193   pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel,
 194   fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask,
 195   unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel,
 196   lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel,
 197   priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel,
 198   priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when,
 199   bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr,
 200   rnat_psprel, rnat_sprel, epilogue, label_state, copy_state,
 201   spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p,
 202   spill_reg_p, unwabi
 203 } unw_record_type;
 204
 205 /* These structures declare the fields that can be used in each of the
 206    4 record formats, R, P, B and X.  */
 207
 208 typedef struct unw_r_record
 209 {
 210   unsigned long rlen;
 211   unsigned short grmask;
 212   unsigned short grsave;
 213   /* masks to represent the union of save.g, save.f, save.b, and
 214      save.gf: */
 215   unsigned long imask_size;
 216   struct
 217   {
 218     unsigned char *i;
 219     unsigned long fr_mem;
 220     unsigned char gr_mem;
 221     unsigned char br_mem;
 222   } mask;
 223 } unw_r_record;
 224
 225 typedef struct unw_p_record
 226 {
 227   void *imask;
 228   unsigned long t;
 229   unsigned long size;
 230   unsigned long spoff;
 231   unsigned long br;
 232   unsigned long pspoff;
 233   unsigned short gr;
 234   unsigned short rmask;
 235   unsigned short grmask;
 236   unsigned long frmask;
 237   unsigned short brmask;
 238   unsigned char abi;
 239   unsigned char context;
 240 } unw_p_record;
 241
 242 typedef struct unw_b_record
 243 {
 244   unsigned long t;
 245   unsigned long label;
 246   unsigned short ecount;
 247 } unw_b_record;
 248
 249 typedef struct unw_x_record
 250 {
 251   unsigned long t;
 252   unsigned long spoff;
 253   unsigned long pspoff;
 254   unsigned short reg;
 255   unsigned short treg;
 256   unsigned short qp;
 257   unsigned short ab;    /* Value of the AB field..  */
 258   unsigned short xy;    /* Value of the XY field..  */
 259 } unw_x_record;
 260
 261 /* This structure is used to determine the specific record type and
 262    its fields.  */
 263 typedef struct unwind_record
 264 {
 265   unw_record_type type;
 266   union {
 267     unw_r_record r;
 268     unw_p_record p;
 269     unw_b_record b;
 270     unw_x_record x;
 271   } record;
 272 } unwind_record;
 273
 274 /* This expression evaluates to true if the relocation is for a local
 275    object for which we still want to do the relocation at runtime.
 276    False if we are willing to perform this relocation while building
 277    the .o file.  */
 278
 279 /* If the reloc type is BFD_RELOC_UNUSED, then this is for a TAG13/TAG13b field
 280    which has no external reloc, so we must resolve the value now.  */
 281
 282 #define TC_FORCE_RELOCATION_LOCAL(FIX)                  \
 283   ((FIX)->fx_r_type != BFD_RELOC_UNUSED                 \
 284    && (!(FIX)->fx_pcrel                                 \
 285        || (FIX)->fx_plt                                 \
 286        || TC_FORCE_RELOCATION (FIX)))