1/* tc-ia64.h -- Header file for tc-ia64.c. 2 Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 3 Free Software Foundation, Inc. 4 Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 5 6 This file is part of GAS, the GNU Assembler. 7 8 GAS is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2, or (at your option) 11 any later version. 12 13 GAS is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GAS; see the file COPYING. If not, write to 20 the Free Software Foundation, 51 Franklin Street - Fifth Floor, 21 Boston, MA 02110-1301, USA. */ 22 23#include "opcode/ia64.h" 24#include "elf/ia64.h" 25 26#define TC_IA64 27 28/* Linux is little endian by default. HPUX is big endian by default. */ 29#ifdef TE_HPUX 30#define TARGET_BYTES_BIG_ENDIAN 1 31#define MD_FLAGS_DEFAULT EF_IA_64_BE 32#else 33#define TARGET_BYTES_BIG_ENDIAN 0 34#define MD_FLAGS_DEFAULT EF_IA_64_ABI64 35#endif /* TE_HPUX */ 36 37extern void (*ia64_number_to_chars) PARAMS ((char *, valueT, int)); 38#define md_number_to_chars (*ia64_number_to_chars) 39 40extern void ia64_elf_section_change_hook PARAMS ((void)); 41#define md_elf_section_change_hook ia64_elf_section_change_hook 42 43/* We record the endian for this section. 0 means default, 1 means 44 big endian and 2 means little endian. */ 45struct ia64_segment_info_type 46{ 47 unsigned int endian : 2; 48}; 49 50#define TC_SEGMENT_INFO_TYPE struct ia64_segment_info_type 51 52extern void ia64_adjust_symtab PARAMS ((void)); 53#define tc_adjust_symtab() ia64_adjust_symtab () 54 55extern void ia64_frob_file PARAMS ((void)); 56#define tc_frob_file() ia64_frob_file () 57 58/* We need to set the default object file format in ia64_init and not in 59 md_begin. This is because parse_args is called before md_begin, and we 60 do not want md_begin to wipe out the flag settings set by options parsed in 61 md_parse_args. */ 62 63#define HOST_SPECIAL_INIT ia64_init 64extern void ia64_init PARAMS ((int, char **)); 65 66#define TARGET_FORMAT ia64_target_format() 67extern const char *ia64_target_format PARAMS ((void)); 68 69#define TARGET_ARCH bfd_arch_ia64 70#define DOUBLESLASH_LINE_COMMENTS /* allow //-style comments */ 71 72#define NEED_LITERAL_POOL /* need gp literal pool */ 73#define RELOC_REQUIRES_SYMBOL 74#define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 75#define NEED_INDEX_OPERATOR /* [ ] is index operator */ 76 77#define QUOTES_IN_INSN /* allow `string "foo;bar"' */ 78#define LEX_AT (LEX_NAME|LEX_BEGIN_NAME) /* allow `@' inside name */ 79#define LEX_QM (LEX_NAME|LEX_BEGIN_NAME) /* allow `?' inside name */ 80#define LEX_HASH LEX_END_NAME /* allow `#' ending a name */ 81 82extern const char ia64_symbol_chars[]; 83#define tc_symbol_chars ia64_symbol_chars 84 85#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 86 87struct ia64_fix 88 { 89 int bigendian; /* byte order at fix location */ 90 enum ia64_opnd opnd; 91 }; 92 93extern void ia64_end_of_source PARAMS((void)); 94extern void ia64_start_line PARAMS((void)); 95extern int ia64_unrecognized_line PARAMS((int ch)); 96extern void ia64_frob_label PARAMS((struct symbol *sym)); 97#ifdef TE_HPUX 98extern int ia64_frob_symbol PARAMS((struct symbol *sym)); 99#endif 100extern void ia64_flush_pending_output PARAMS((void)); 101extern int ia64_parse_name PARAMS((char *name, expressionS *e, char *nextP)); 102extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op, 103 expressionS *r)); 104extern void ia64_cons_align PARAMS((int)); 105extern void ia64_flush_insns PARAMS((void)); 106extern int ia64_fix_adjustable PARAMS((struct fix *fix)); 107extern int ia64_force_relocation PARAMS((struct fix *)); 108extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes, 109 expressionS *exp)); 110extern void ia64_validate_fix PARAMS ((struct fix *fix)); 111extern char * ia64_canonicalize_symbol_name PARAMS ((char *)); 112extern int ia64_elf_section_letter PARAMS ((int, char **)); 113extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int)); 114extern int ia64_elf_section_type PARAMS ((const char *, size_t len)); 115extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec)); 116extern void ia64_md_do_align PARAMS ((int, const char *, int, int)); 117extern void ia64_handle_align PARAMS ((fragS *f)); 118extern void ia64_after_parse_args PARAMS ((void)); 119extern void ia64_dwarf2_emit_offset PARAMS ((symbolS *, unsigned int)); 120extern void ia64_check_label PARAMS ((symbolS *)); 121extern int ia64_estimate_size_before_relax (fragS *, asection *); 122extern void ia64_convert_frag (fragS *); 123 124#define md_end() ia64_end_of_source () 125#define md_start_line_hook() ia64_start_line () 126#define tc_unrecognized_line(ch) ia64_unrecognized_line (ch) 127#define tc_frob_label(s) ia64_frob_label (s) 128#ifdef TE_HPUX 129#define tc_frob_symbol(s,p) p |= ia64_frob_symbol (s) 130#endif /* TE_HPUX */ 131#define md_flush_pending_output() ia64_flush_pending_output () 132#define md_parse_name(s,e,m,c) ia64_parse_name (s, e, c) 133#define tc_canonicalize_symbol_name(s) ia64_canonicalize_symbol_name (s) 134#define tc_canonicalize_section_name(s) ia64_canonicalize_symbol_name (s) 135#define md_optimize_expr(l,o,r) ia64_optimize_expr (l, o, r) 136#define md_cons_align(n) ia64_cons_align (n) 137#define TC_FORCE_RELOCATION(f) ia64_force_relocation (f) 138#define tc_fix_adjustable(f) ia64_fix_adjustable (f) 139#define MD_APPLY_SYM_VALUE(FIX) 0 140#define md_convert_frag(b,s,f) ia64_convert_frag (f) 141#define md_create_long_jump(p,f,t,fr,s) as_fatal ("ia64_create_long_jump") 142#define md_create_short_jump(p,f,t,fr,s) \ 143 as_fatal ("ia64_create_short_jump") 144#define md_estimate_size_before_relax(f,s) \ 145 ia64_estimate_size_before_relax(f,s) 146#define md_elf_section_letter ia64_elf_section_letter 147#define md_elf_section_flags ia64_elf_section_flags 148#define TC_FIX_TYPE struct ia64_fix 149#define TC_INIT_FIX_DATA(f) { f->tc_fix_data.opnd = 0; } 150#define TC_CONS_FIX_NEW(f,o,l,e) ia64_cons_fix_new (f, o, l, e) 151#define TC_VALIDATE_FIX(fix,seg,skip) ia64_validate_fix (fix) 152#define MD_PCREL_FROM_SECTION(fix,sec) ia64_pcrel_from_section (fix, sec) 153#define md_section_align(seg,size) (size) 154#define md_do_align(n,f,l,m,j) ia64_md_do_align (n,f,l,m) 155#define HANDLE_ALIGN(f) ia64_handle_align (f) 156#define md_elf_section_type(str,len) ia64_elf_section_type (str, len) 157#define md_after_parse_args() ia64_after_parse_args () 158#define TC_DWARF2_EMIT_OFFSET ia64_dwarf2_emit_offset 159#define tc_check_label(l) ia64_check_label (l) 160 161/* Record if an alignment frag should end with a stop bit. */ 162#define TC_FRAG_TYPE int 163#define TC_FRAG_INIT(FRAGP) do {(FRAGP)->tc_frag_data = 0;}while (0) 164 165/* Give an error if a frag containing code is not aligned to a 16 byte 166 boundary. */ 167#define md_frag_check(FRAGP) \ 168 if ((FRAGP)->has_code \ 169 && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 15) != 0) \ 170 as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \ 171 _("instruction address is not a multiple of 16")); 172 173#define MAX_MEM_FOR_RS_ALIGN_CODE (15 + 16) 174 175#define WORKING_DOT_WORD /* don't do broken word processing for now */ 176 177#define DWARF2_LINE_MIN_INSN_LENGTH 1 /* so slot-multipliers can be 1 */ 178 179/* This is the information required for unwind records in an ia64 180 object file. This is required by GAS and the compiler runtime. */ 181 182/* These are the starting point masks for the various types of 183 unwind records. To create a record of type R3 for instance, one 184 starts by using the value UNW_R3 and or-ing in any other required values. 185 These values are also unique (in context), so they can be used to identify 186 the various record types as well. UNW_Bx and some UNW_Px do have the 187 same value, but Px can only occur in a prologue context, and Bx in 188 a body context. */ 189 190#define UNW_R1 0x00 191#define UNW_R2 0x40 192#define UNW_R3 0x60 193#define UNW_P1 0x80 194#define UNW_P2 0xA0 195#define UNW_P3 0xB0 196#define UNW_P4 0xB8 197#define UNW_P5 0xB9 198#define UNW_P6 0xC0 199#define UNW_P7 0xE0 200#define UNW_P8 0xF0 201#define UNW_P9 0xF1 202#define UNW_P10 0xFF 203#define UNW_X1 0xF9 204#define UNW_X2 0xFA 205#define UNW_X3 0xFB 206#define UNW_X4 0xFC 207#define UNW_B1 0x80 208#define UNW_B2 0xC0 209#define UNW_B3 0xE0 210#define UNW_B4 0xF0 211 212/* These are all the various types of unwind records. */ 213 214typedef enum 215{ 216 prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel, 217 rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel, 218 pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel, 219 fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask, 220 unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel, 221 lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel, 222 priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel, 223 priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when, 224 bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr, 225 rnat_psprel, rnat_sprel, epilogue, label_state, copy_state, 226 spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p, 227 spill_reg_p, unwabi, endp 228} unw_record_type; 229 230/* These structures declare the fields that can be used in each of the 231 4 record formats, R, P, B and X. */ 232 233typedef struct unw_r_record 234{ 235 unsigned long rlen; 236 unsigned short grmask; 237 unsigned short grsave; 238 /* masks to represent the union of save.g, save.f, save.b, and 239 save.gf: */ 240 unsigned long imask_size; 241 struct 242 { 243 unsigned char *i; 244 unsigned int fr_mem; 245 unsigned char gr_mem; 246 unsigned char br_mem; 247 } mask; 248} unw_r_record; 249 250typedef struct unw_p_record 251{ 252 struct unw_rec_list *next; 253 unsigned long t; 254 unsigned long size; 255 union 256 { 257 unsigned long sp; 258 unsigned long psp; 259 } off; 260 union 261 { 262 unsigned short gr; 263 unsigned short br; 264 } r; 265 unsigned char grmask; 266 unsigned char brmask; 267 unsigned int frmask; 268 unsigned char abi; 269 unsigned char context; 270} unw_p_record; 271 272typedef struct unw_b_record 273{ 274 unsigned long t; 275 unsigned long label; 276 unsigned short ecount; 277} unw_b_record; 278 279typedef struct unw_x_record 280{ 281 unsigned long t; 282 union 283 { 284 unsigned long spoff; 285 unsigned long pspoff; 286 unsigned int reg; 287 } where; 288 unsigned short reg; 289 unsigned short qp; 290 unsigned short ab; /* Value of the AB field.. */ 291 unsigned short xy; /* Value of the XY field.. */ 292} unw_x_record; 293 294/* This structure is used to determine the specific record type and 295 its fields. */ 296typedef struct unwind_record 297{ 298 unw_record_type type; 299 union { 300 unw_r_record r; 301 unw_p_record p; 302 unw_b_record b; 303 unw_x_record x; 304 } record; 305} unwind_record; 306 307/* This expression evaluates to true if the relocation is for a local 308 object for which we still want to do the relocation at runtime. 309 False if we are willing to perform this relocation while building 310 the .o file. */ 311 312/* If the reloc type is BFD_RELOC_UNUSED, then this is for a TAG13/TAG13b field 313 which has no external reloc, so we must resolve the value now. */ 314 315#define TC_FORCE_RELOCATION_LOCAL(FIX) \ 316 ((FIX)->fx_r_type != BFD_RELOC_UNUSED \ 317 && (!(FIX)->fx_pcrel \ 318 || (FIX)->fx_r_type == BFD_RELOC_IA64_PLTOFF22 \ 319 || TC_FORCE_RELOCATION (FIX))) 320