| 1 | /* tc-ppc.h -- Header file for tc-ppc.c. |
| 2 | Copyright (C) 1994-2018 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 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 3, 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 the Free |
| 19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 20 | 02110-1301, USA. */ |
| 21 | |
| 22 | #define TC_PPC |
| 23 | |
| 24 | #include "opcode/ppc.h" |
| 25 | |
| 26 | struct fix; |
| 27 | |
| 28 | /* Set the endianness we are using. Default to big endian. */ |
| 29 | #ifndef TARGET_BYTES_BIG_ENDIAN |
| 30 | #define TARGET_BYTES_BIG_ENDIAN 1 |
| 31 | #endif |
| 32 | |
| 33 | /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling |
| 34 | XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling |
| 35 | COFF for Windows NT. */ |
| 36 | |
| 37 | #ifdef OBJ_COFF |
| 38 | #ifndef TE_PE |
| 39 | #define OBJ_XCOFF |
| 40 | #endif |
| 41 | #endif |
| 42 | |
| 43 | /* The target BFD architecture. */ |
| 44 | #define TARGET_ARCH (ppc_arch ()) |
| 45 | #define TARGET_MACH (ppc_mach ()) |
| 46 | extern enum bfd_architecture ppc_arch (void); |
| 47 | extern unsigned long ppc_mach (void); |
| 48 | |
| 49 | /* Whether or not the target is big endian */ |
| 50 | extern int target_big_endian; |
| 51 | |
| 52 | /* The target BFD format. */ |
| 53 | #define TARGET_FORMAT (ppc_target_format ()) |
| 54 | extern const char *ppc_target_format (void); |
| 55 | |
| 56 | /* Permit temporary numeric labels. */ |
| 57 | #define LOCAL_LABELS_FB 1 |
| 58 | |
| 59 | /* $ is used to refer to the current location. */ |
| 60 | #define DOLLAR_DOT |
| 61 | |
| 62 | /* Strings do not use backslash escapes under COFF. */ |
| 63 | #ifdef OBJ_COFF |
| 64 | #define NO_STRING_ESCAPES |
| 65 | #endif |
| 66 | |
| 67 | #ifdef OBJ_ELF |
| 68 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ |
| 69 | #endif |
| 70 | |
| 71 | #if TARGET_BYTES_BIG_ENDIAN |
| 72 | #define PPC_BIG_ENDIAN 1 |
| 73 | #else |
| 74 | #define PPC_BIG_ENDIAN 0 |
| 75 | #endif |
| 76 | |
| 77 | /* We don't need to handle .word strangely. */ |
| 78 | #define WORKING_DOT_WORD |
| 79 | |
| 80 | #define MAX_MEM_FOR_RS_ALIGN_CODE 4 |
| 81 | #define HANDLE_ALIGN(FRAGP) \ |
| 82 | if ((FRAGP)->fr_type == rs_align_code) \ |
| 83 | ppc_handle_align (FRAGP); |
| 84 | |
| 85 | extern void ppc_handle_align (struct frag *); |
| 86 | extern void ppc_frag_check (struct frag *); |
| 87 | |
| 88 | #ifdef OBJ_ELF |
| 89 | #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 |
| 90 | #endif |
| 91 | |
| 92 | #define md_frag_check(FRAGP) ppc_frag_check (FRAGP) |
| 93 | |
| 94 | /* Arrange to store the value of ppc_cpu at the site of a fixup |
| 95 | for later use in md_apply_fix. */ |
| 96 | struct _ppc_fix_extra |
| 97 | { |
| 98 | ppc_cpu_t ppc_cpu; |
| 99 | }; |
| 100 | |
| 101 | extern ppc_cpu_t ppc_cpu; |
| 102 | |
| 103 | #define TC_FIX_TYPE struct _ppc_fix_extra |
| 104 | #define TC_INIT_FIX_DATA(FIXP) \ |
| 105 | do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0) |
| 106 | \f |
| 107 | #ifdef TE_PE |
| 108 | |
| 109 | /* Question marks are permitted in symbol names. */ |
| 110 | #define LEX_QM 1 |
| 111 | |
| 112 | /* Don't adjust TOC relocs. */ |
| 113 | #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) |
| 114 | extern int ppc_pe_fix_adjustable (struct fix *); |
| 115 | |
| 116 | #endif |
| 117 | |
| 118 | #ifdef OBJ_XCOFF |
| 119 | |
| 120 | /* Declarations needed when generating XCOFF code. XCOFF is an |
| 121 | extension of COFF, used only on the RS/6000. Rather than create an |
| 122 | obj-xcoff, we just use obj-coff, and handle the extensions here in |
| 123 | tc-ppc. */ |
| 124 | |
| 125 | /* We need to keep some information for symbols. */ |
| 126 | struct ppc_tc_sy |
| 127 | { |
| 128 | /* We keep a few linked lists of symbols. */ |
| 129 | symbolS *next; |
| 130 | /* The real name, if the symbol was renamed. */ |
| 131 | char *real_name; |
| 132 | /* Non-zero if the symbol should be output. The RS/6000 assembler |
| 133 | only outputs symbols that are external or are mentioned in a |
| 134 | .globl or .lglobl statement. */ |
| 135 | unsigned char output; |
| 136 | /* The symbol class. */ |
| 137 | short symbol_class; |
| 138 | /* For a csect or common symbol, the alignment to use. */ |
| 139 | unsigned char align; |
| 140 | /* For a csect symbol, the subsegment we are using. This is zero |
| 141 | for symbols that are not csects. */ |
| 142 | subsegT subseg; |
| 143 | /* For a csect symbol, the last symbol which has been defined in |
| 144 | this csect, or NULL if none have been defined so far. |
| 145 | For a .bs symbol, the referenced csect symbol. |
| 146 | For a label, the enclosing csect. */ |
| 147 | symbolS *within; |
| 148 | union |
| 149 | { |
| 150 | /* For a function symbol, a symbol whose value is the size. The |
| 151 | field is NULL if there is no size. */ |
| 152 | symbolS *size; |
| 153 | /* For a dwarf symbol, the corresponding dwarf subsection. */ |
| 154 | struct dw_subsection *dw; |
| 155 | } u; |
| 156 | }; |
| 157 | |
| 158 | #define TC_SYMFIELD_TYPE struct ppc_tc_sy |
| 159 | |
| 160 | /* We need an additional auxent for function symbols. */ |
| 161 | #define OBJ_COFF_MAX_AUXENTRIES 2 |
| 162 | |
| 163 | /* Square and curly brackets are permitted in symbol names. */ |
| 164 | #define LEX_BR 3 |
| 165 | |
| 166 | /* Canonicalize the symbol name. */ |
| 167 | #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) |
| 168 | extern char *ppc_canonicalize_symbol_name (char *); |
| 169 | |
| 170 | /* Get the symbol class from the name. */ |
| 171 | #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) |
| 172 | extern void ppc_symbol_new_hook (symbolS *); |
| 173 | |
| 174 | /* Set the symbol class of a label based on the csect. */ |
| 175 | #define tc_frob_label(sym) ppc_frob_label (sym) |
| 176 | extern void ppc_frob_label (symbolS *); |
| 177 | |
| 178 | /* TOC relocs requires special handling. */ |
| 179 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) |
| 180 | extern int ppc_fix_adjustable (struct fix *); |
| 181 | |
| 182 | /* We need to set the section VMA. */ |
| 183 | #define tc_frob_section(sec) ppc_frob_section (sec) |
| 184 | extern void ppc_frob_section (asection *); |
| 185 | |
| 186 | /* Finish up the symbol. */ |
| 187 | #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) |
| 188 | extern int ppc_frob_symbol (symbolS *); |
| 189 | |
| 190 | /* Finish up the entire symtab. */ |
| 191 | #define tc_adjust_symtab() ppc_adjust_symtab () |
| 192 | extern void ppc_adjust_symtab (void); |
| 193 | |
| 194 | /* We also need to copy, in particular, the class of the symbol, |
| 195 | over what obj-coff would otherwise have copied. */ |
| 196 | #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ |
| 197 | do { \ |
| 198 | if (SF_GET_GET_SEGMENT (dest)) \ |
| 199 | S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ |
| 200 | symbol_get_tc (dest)->u = symbol_get_tc (src)->u; \ |
| 201 | symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ |
| 202 | symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \ |
| 203 | symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ |
| 204 | } while (0) |
| 205 | |
| 206 | extern void ppc_xcoff_end (void); |
| 207 | #define md_end ppc_xcoff_end |
| 208 | |
| 209 | #define tc_new_dot_label(sym) ppc_new_dot_label (sym) |
| 210 | extern void ppc_new_dot_label (symbolS *); |
| 211 | |
| 212 | #endif /* OBJ_XCOFF */ |
| 213 | |
| 214 | extern const char ppc_symbol_chars[]; |
| 215 | #define tc_symbol_chars ppc_symbol_chars |
| 216 | |
| 217 | #ifdef OBJ_ELF |
| 218 | |
| 219 | /* Support for SHT_ORDERED */ |
| 220 | extern int ppc_section_type (char *, size_t); |
| 221 | extern int ppc_section_flags (flagword, bfd_vma, int); |
| 222 | |
| 223 | #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) |
| 224 | #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) |
| 225 | |
| 226 | #define tc_comment_chars ppc_comment_chars |
| 227 | extern const char *ppc_comment_chars; |
| 228 | |
| 229 | #define md_elf_section_letter ppc_elf_section_letter |
| 230 | extern bfd_vma ppc_elf_section_letter (int, const char **); |
| 231 | |
| 232 | /* Keep relocations relative to the GOT, or non-PC relative. */ |
| 233 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) |
| 234 | extern int ppc_fix_adjustable (struct fix *); |
| 235 | |
| 236 | /* Values passed to md_apply_fix don't include symbol values. */ |
| 237 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
| 238 | |
| 239 | #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \ |
| 240 | ppc_elf_parse_cons (EXP, NBYTES) |
| 241 | extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *, |
| 242 | unsigned int); |
| 243 | #define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \ |
| 244 | ppc_elf_cons_fix_check (EXP, NBYTES, FIX) |
| 245 | extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *); |
| 246 | |
| 247 | #define tc_frob_file_before_adjust ppc_frob_file_before_adjust |
| 248 | extern void ppc_frob_file_before_adjust (void); |
| 249 | |
| 250 | #define tc_adjust_symtab() ppc_elf_adjust_symtab () |
| 251 | extern void ppc_elf_adjust_symtab (void); |
| 252 | |
| 253 | extern void ppc_elf_end (void); |
| 254 | #define md_end ppc_elf_end |
| 255 | |
| 256 | #endif /* OBJ_ELF */ |
| 257 | |
| 258 | #if defined (OBJ_ELF) || defined (OBJ_XCOFF) |
| 259 | #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) |
| 260 | extern int ppc_force_relocation (struct fix *); |
| 261 | #endif |
| 262 | |
| 263 | #ifdef OBJ_ELF |
| 264 | /* Don't allow the generic code to convert fixups involving the |
| 265 | subtraction of a label in the current section to pc-relative if we |
| 266 | don't have the necessary pc-relative relocation. */ |
| 267 | #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ |
| 268 | (!((FIX)->fx_r_type == BFD_RELOC_LO16 \ |
| 269 | || (FIX)->fx_r_type == BFD_RELOC_HI16 \ |
| 270 | || (FIX)->fx_r_type == BFD_RELOC_HI16_S \ |
| 271 | || (FIX)->fx_r_type == BFD_RELOC_64 \ |
| 272 | || (FIX)->fx_r_type == BFD_RELOC_32 \ |
| 273 | || (FIX)->fx_r_type == BFD_RELOC_16 \ |
| 274 | || (FIX)->fx_r_type == BFD_RELOC_PPC_16DX_HA)) |
| 275 | #endif |
| 276 | |
| 277 | #define TC_VALIDATE_FIX_SUB(FIX, SEG) 0 |
| 278 | |
| 279 | /* call md_pcrel_from_section, not md_pcrel_from */ |
| 280 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) |
| 281 | extern long md_pcrel_from_section (struct fix *, segT); |
| 282 | |
| 283 | #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) |
| 284 | extern int ppc_parse_name (const char *, struct expressionS *); |
| 285 | |
| 286 | #define md_optimize_expr(left, op, right) ppc_optimize_expr (left, op, right) |
| 287 | extern int ppc_optimize_expr (expressionS *, operatorT, expressionS *); |
| 288 | |
| 289 | #define md_operand(x) |
| 290 | |
| 291 | #define md_cleanup() ppc_cleanup () |
| 292 | extern void ppc_cleanup (void); |
| 293 | |
| 294 | #if (defined TE_AIX5 || defined TE_AIX \ |
| 295 | || defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX) |
| 296 | /* ppc uses different register numbers between .eh_frame and .debug_frame. |
| 297 | This macro translates the .eh_frame register numbers to .debug_frame |
| 298 | register numbers. */ |
| 299 | #define md_reg_eh_frame_to_debug_frame(regno) \ |
| 300 | ((regno) == 70 ? 64 /* cr2 */ \ |
| 301 | : (regno) == 65 ? 108 /* lr */ \ |
| 302 | : (regno) == 66 ? 109 /* ctr */ \ |
| 303 | : (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \ |
| 304 | : (regno) == 76 ? 101 /* xer */ \ |
| 305 | : (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \ |
| 306 | : (regno) == 109 ? 356 /* vrsave */ \ |
| 307 | : (regno) == 110 ? 67 /* vscr */ \ |
| 308 | : (regno) == 111 ? 99 /* spe_acc */ \ |
| 309 | : (regno) == 112 ? 612 /* spefscr */ \ |
| 310 | : (regno)) |
| 311 | #endif |
| 312 | |
| 313 | #define TARGET_USE_CFIPOP 1 |
| 314 | |
| 315 | #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions |
| 316 | extern void ppc_cfi_frame_initial_instructions (void); |
| 317 | |
| 318 | #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum |
| 319 | extern int tc_ppc_regname_to_dw2regnum (char *); |
| 320 | |
| 321 | extern int ppc_cie_data_alignment; |
| 322 | |
| 323 | extern int ppc_dwarf2_line_min_insn_length; |
| 324 | |
| 325 | #define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length |
| 326 | #define DWARF2_DEFAULT_RETURN_COLUMN 0x41 |
| 327 | #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment |
| 328 | #define EH_FRAME_ALIGNMENT 2 |