1 /* tc-ia64.h -- Header file for tc-ia64.c. 2 Copyright 1998, 1999, 2000, 2001 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 extern void ia64_init PARAMS ((int, char **)); 43 44 #define TARGET_FORMAT ia64_target_format() 45 extern const char *ia64_target_format PARAMS ((void)); 46 47 #define TARGET_ARCH bfd_arch_ia64 48 #define DOUBLESLASH_LINE_COMMENTS /* allow //-style comments */ 49 #define TC_HANDLES_FX_DONE 50 51 #define NEED_LITERAL_POOL /* need gp literal pool */ 52 #define RELOC_REQUIRES_SYMBOL 53 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 54 #define NEED_INDEX_OPERATOR /* [ ] is index operator */ 55 56 #define QUOTES_IN_INSN /* allow `string "foo;bar"' */ 57 #define LEX_AT LEX_NAME /* allow `@' inside name */ 58 #define LEX_QM LEX_NAME /* allow `?' inside name */ 59 #define LEX_HASH LEX_END_NAME /* allow `#' ending a name */ 60 61 struct ia64_fix 62 { 63 int bigendian; /* byte order at fix location */ 64 enum ia64_opnd opnd; 65 }; 66 67 extern void ia64_do_align PARAMS((int n)); 68 extern void ia64_end_of_source PARAMS((void)); 69 extern void ia64_start_line PARAMS((void)); 70 extern int ia64_unrecognized_line PARAMS((int ch)); 71 extern void ia64_frob_label PARAMS((struct symbol *sym)); 72 extern void ia64_flush_pending_output PARAMS((void)); 73 extern int ia64_parse_name (char *name, expressionS *e); 74 extern int ia64_optimize_expr PARAMS((expressionS *l, operatorT op, 75 expressionS *r)); 76 extern void ia64_cons_align PARAMS((int)); 77 extern void ia64_flush_insns PARAMS((void)); 78 extern int ia64_fix_adjustable PARAMS((struct fix *fix)); 79 extern int ia64_force_relocation PARAMS((struct fix *)); 80 extern void ia64_cons_fix_new PARAMS ((fragS *f, int where, int nbytes, 81 expressionS *exp)); 82 extern void ia64_validate_fix PARAMS ((struct fix *fix)); 83 extern char * ia64_canonicalize_symbol_name PARAMS ((char *)); 84 extern flagword ia64_elf_section_flags PARAMS ((flagword, int, int)); 85 extern int ia64_elf_section_type PARAMS ((const char *, size_t len)); 86 extern long ia64_pcrel_from_section PARAMS ((struct fix *fix, segT sec)); 87 extern void ia64_md_do_align PARAMS ((int, const char *, int, int)); 88 extern void ia64_handle_align PARAMS ((fragS *f)); 89 90 #define md_end() ia64_end_of_source () 91 #define md_start_line_hook() ia64_start_line () 92 #define tc_unrecognized_line(ch) ia64_unrecognized_line (ch) 93 #define tc_frob_label(s) ia64_frob_label (s) 94 #define md_flush_pending_output() ia64_flush_pending_output () 95 #define md_parse_name(s,e) ia64_parse_name (s, e) 96 #define tc_canonicalize_symbol_name(s) ia64_canonicalize_symbol_name (s) 97 #define md_optimize_expr(l,o,r) ia64_optimize_expr (l, o, r) 98 #define md_cons_align(n) ia64_cons_align (n) 99 #define TC_FORCE_RELOCATION(f) ia64_force_relocation (f) 100 #define tc_fix_adjustable(f) ia64_fix_adjustable (f) 101 #define md_convert_frag(b,s,f) as_fatal ("ia64_convert_frag") 102 #define md_create_long_jump(p,f,t,fr,s) as_fatal("ia64_create_long_jump") 103 #define md_create_short_jump(p,f,t,fr,s) \ 104 as_fatal("ia64_create_short_jump") 105 #define md_estimate_size_before_relax(f,s) \ 106 (as_fatal ("ia64_estimate_size_before_relax"), 1) 107 #define md_elf_section_flags ia64_elf_section_flags 108 #define TC_FIX_TYPE struct ia64_fix 109 #define TC_INIT_FIX_DATA(f) { f->tc_fix_data.opnd = 0; } 110 #define TC_CONS_FIX_NEW(f,o,l,e) ia64_cons_fix_new (f, o, l, e) 111 #define TC_VALIDATE_FIX(fix,seg,skip) ia64_validate_fix (fix) 112 #define MD_PCREL_FROM_SECTION(fix,sec) ia64_pcrel_from_section (fix, sec) 113 #define md_do_align(n,f,l,m,j) ia64_md_do_align (n,f,l,m) 114 #define HANDLE_ALIGN(f) ia64_handle_align (f) 115 #define md_elf_section_type(str,len) ia64_elf_section_type (str, len) 116 117 #define MAX_MEM_FOR_RS_ALIGN_CODE (15 + 16) 118 119 /* Call md_apply_fix3 with segment instead of md_apply_fix. */ 120 #define MD_APPLY_FIX3 121 122 #define WORKING_DOT_WORD /* don't do broken word processing for now */ 123 124 #define ELF_TC_SPECIAL_SECTIONS \ 125 { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, \ 126 { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_IA_64_SHORT }, 127 128 #define DWARF2_LINE_MIN_INSN_LENGTH 1 /* so slot-multipliers can be 1 */ 129 130 /* This is the information required for unwind records in an ia64 131 object file. This is required by GAS and the compiler runtime. */ 132 133 /* These are the starting point masks for the various types of 134 unwind records. To create a record of type R3 for instance, one 135 starts by using the value UNW_R3 and or-ing in any other required values. 136 These values are also unique (in context), so they can be used to identify 137 the various record types as well. UNW_Bx and some UNW_Px do have the 138 same value, but Px can only occur in a prologue context, and Bx in 139 a body context. */ 140 141 #define UNW_R1 0x00 142 #define UNW_R2 0x40 143 #define UNW_R3 0x60 144 #define UNW_P1 0x80 145 #define UNW_P2 0xA0 146 #define UNW_P3 0xB0 147 #define UNW_P4 0xB8 148 #define UNW_P5 0xB9 149 #define UNW_P6 0xC0 150 #define UNW_P7 0xE0 151 #define UNW_P8 0xF0 152 #define UNW_P9 0xF1 153 #define UNW_P10 0xFF 154 #define UNW_X1 0xF9 155 #define UNW_X2 0xFA 156 #define UNW_X3 0xFB 157 #define UNW_X4 0xFC 158 #define UNW_B1 0x80 159 #define UNW_B2 0xC0 160 #define UNW_B3 0xE0 161 #define UNW_B4 0xF0 162 163 /* These are all the various types of unwind records. */ 164 165 typedef enum 166 { 167 prologue, prologue_gr, body, mem_stack_f, mem_stack_v, psp_gr, psp_sprel, 168 rp_when, rp_gr, rp_br, rp_psprel, rp_sprel, pfs_when, pfs_gr, pfs_psprel, 169 pfs_sprel, preds_when, preds_gr, preds_psprel, preds_sprel, 170 fr_mem, frgr_mem, gr_gr, gr_mem, br_mem, br_gr, spill_base, spill_mask, 171 unat_when, unat_gr, unat_psprel, unat_sprel, lc_when, lc_gr, lc_psprel, 172 lc_sprel, fpsr_when, fpsr_gr, fpsr_psprel, fpsr_sprel, 173 priunat_when_gr, priunat_when_mem, priunat_gr, priunat_psprel, 174 priunat_sprel, bsp_when, bsp_gr, bsp_psprel, bsp_sprel, bspstore_when, 175 bspstore_gr, bspstore_psprel, bspstore_sprel, rnat_when, rnat_gr, 176 rnat_psprel, rnat_sprel, epilogue, label_state, copy_state, 177 spill_psprel, spill_sprel, spill_reg, spill_psprel_p, spill_sprel_p, 178 spill_reg_p, unwabi 179 } unw_record_type; 180 181 /* These structures declare the fields that can be used in each of the 182 4 record formats, R, P, B and X. */ 183 184 typedef struct unw_r_record 185 { 186 unsigned long rlen; 187 unsigned short grmask; 188 unsigned short grsave; 189 /* masks to represent the union of save.g, save.f, save.b, and 190 save.gf: */ 191 unsigned long imask_size; 192 struct 193 { 194 unsigned char *i; 195 unsigned long fr_mem; 196 unsigned char gr_mem; 197 unsigned char br_mem; 198 } mask; 199 } unw_r_record; 200 201 typedef struct unw_p_record 202 { 203 void *imask; 204 unsigned long t; 205 unsigned long size; 206 unsigned long spoff; 207 unsigned long br; 208 unsigned long pspoff; 209 unsigned short gr; 210 unsigned short rmask; 211 unsigned short grmask; 212 unsigned long frmask; 213 unsigned short brmask; 214 unsigned char abi; 215 unsigned char context; 216 } unw_p_record; 217 218 typedef struct unw_b_record 219 { 220 unsigned long t; 221 unsigned long label; 222 unsigned short ecount; 223 } unw_b_record; 224 225 typedef struct unw_x_record 226 { 227 unsigned long t; 228 unsigned long spoff; 229 unsigned long pspoff; 230 unsigned short reg; 231 unsigned short treg; 232 unsigned short qp; 233 unsigned short ab; /* Value of the AB field.. */ 234 unsigned short xy; /* Value of the XY field.. */ 235 } unw_x_record; 236 237 /* This structure is used to determine the specific record type and 238 its fields. */ 239 typedef struct unwind_record 240 { 241 unw_record_type type; 242 union { 243 unw_r_record r; 244 unw_p_record p; 245 unw_b_record b; 246 unw_x_record x; 247 } record; 248 } unwind_record; 249 250 /* This expression evaluates to false if the relocation is for a local 251 object for which we still want to do the relocation at runtime. 252 True if we are willing to perform this relocation while building 253 the .o file. This is only used for pcrel relocations. */ 254 255 #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ 256 ((FIX)->fx_addsy == NULL \ 257 || (FIX)->fx_r_type == 0 \ 258 || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ 259 && ! S_IS_WEAK ((FIX)->fx_addsy) \ 260 && S_IS_DEFINED ((FIX)->fx_addsy) \ 261 && ! S_IS_COMMON ((FIX)->fx_addsy))) 262