1/* tc-ppc.h -- Header file for tc-ppc.c. 2 Copyright (C) 1994-2017 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 26struct 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 ()) 46extern enum bfd_architecture ppc_arch (void); 47extern unsigned long ppc_mach (void); 48 49/* Whether or not the target is big endian */ 50extern int target_big_endian; 51 52/* The target BFD format. */ 53#define TARGET_FORMAT (ppc_target_format ()) 54extern 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 85extern void ppc_handle_align (struct frag *); 86extern 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. */ 96struct _ppc_fix_extra 97{ 98 ppc_cpu_t ppc_cpu; 99}; 100 101extern 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) 106 107#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) 114extern 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. */ 126struct 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) 168extern 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) 172extern 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) 176extern void ppc_frob_label (symbolS *); 177 178/* TOC relocs requires special handling. */ 179#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 180extern 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) 184extern void ppc_frob_section (asection *); 185 186/* Finish up the symbol. */ 187#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) 188extern int ppc_frob_symbol (symbolS *); 189 190/* Finish up the entire symtab. */ 191#define tc_adjust_symtab() ppc_adjust_symtab () 192extern 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) \ 197do { \ 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 206extern 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) 210extern void ppc_new_dot_label (symbolS *); 211 212#endif /* OBJ_XCOFF */ 213 214extern const char ppc_symbol_chars[]; 215#define tc_symbol_chars ppc_symbol_chars 216 217#ifdef OBJ_ELF 218 219/* Support for SHT_ORDERED */ 220extern int ppc_section_type (char *, size_t); 221extern 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 227extern const char *ppc_comment_chars; 228 229/* Keep relocations relative to the GOT, or non-PC relative. */ 230#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 231extern int ppc_fix_adjustable (struct fix *); 232 233/* Values passed to md_apply_fix don't include symbol values. */ 234#define MD_APPLY_SYM_VALUE(FIX) 0 235 236#define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \ 237 ppc_elf_parse_cons (EXP, NBYTES) 238extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *, 239 unsigned int); 240#define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \ 241 ppc_elf_cons_fix_check (EXP, NBYTES, FIX) 242extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *); 243 244#define tc_frob_file_before_adjust ppc_frob_file_before_adjust 245extern void ppc_frob_file_before_adjust (void); 246 247#define tc_adjust_symtab() ppc_elf_adjust_symtab () 248extern void ppc_elf_adjust_symtab (void); 249 250extern void ppc_elf_end (void); 251#define md_end ppc_elf_end 252 253#endif /* OBJ_ELF */ 254 255#if defined (OBJ_ELF) || defined (OBJ_XCOFF) 256#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) 257extern int ppc_force_relocation (struct fix *); 258#endif 259 260#ifdef OBJ_ELF 261/* Don't allow the generic code to convert fixups involving the 262 subtraction of a label in the current section to pc-relative if we 263 don't have the necessary pc-relative relocation. */ 264#define TC_FORCE_RELOCATION_SUB_LOCAL(FIX, SEG) \ 265 (!((FIX)->fx_r_type == BFD_RELOC_LO16 \ 266 || (FIX)->fx_r_type == BFD_RELOC_HI16 \ 267 || (FIX)->fx_r_type == BFD_RELOC_HI16_S \ 268 || (FIX)->fx_r_type == BFD_RELOC_64 \ 269 || (FIX)->fx_r_type == BFD_RELOC_32 \ 270 || (FIX)->fx_r_type == BFD_RELOC_16 \ 271 || (FIX)->fx_r_type == BFD_RELOC_PPC_16DX_HA)) 272#endif 273 274#define TC_VALIDATE_FIX_SUB(FIX, SEG) 0 275 276/* call md_pcrel_from_section, not md_pcrel_from */ 277#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) 278extern long md_pcrel_from_section (struct fix *, segT); 279 280#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) 281extern int ppc_parse_name (const char *, struct expressionS *); 282 283#define md_operand(x) 284 285#define md_cleanup() ppc_cleanup () 286extern void ppc_cleanup (void); 287 288#if (defined TE_AIX5 || defined TE_AIX \ 289 || defined TE_FreeBSD || defined TE_NetBSD || defined TE_LYNX) 290/* ppc uses different register numbers between .eh_frame and .debug_frame. 291 This macro translates the .eh_frame register numbers to .debug_frame 292 register numbers. */ 293#define md_reg_eh_frame_to_debug_frame(regno) \ 294 ((regno) == 70 ? 64 /* cr2 */ \ 295 : (regno) == 65 ? 108 /* lr */ \ 296 : (regno) == 66 ? 109 /* ctr */ \ 297 : (regno) >= 68 && (regno) <= 75 ? (regno) + 86 - 68 /* crN */ \ 298 : (regno) == 76 ? 101 /* xer */ \ 299 : (regno) >= 77 && (regno) <= 108 ? (regno) + 1124 - 77 /* vrN */ \ 300 : (regno) == 109 ? 356 /* vrsave */ \ 301 : (regno) == 110 ? 67 /* vscr */ \ 302 : (regno) == 111 ? 99 /* spe_acc */ \ 303 : (regno) == 112 ? 612 /* spefscr */ \ 304 : (regno)) 305#endif 306 307#define TARGET_USE_CFIPOP 1 308 309#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions 310extern void ppc_cfi_frame_initial_instructions (void); 311 312#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum 313extern int tc_ppc_regname_to_dw2regnum (char *); 314 315extern int ppc_cie_data_alignment; 316 317extern int ppc_dwarf2_line_min_insn_length; 318 319#define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length 320#define DWARF2_DEFAULT_RETURN_COLUMN 0x41 321#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment 322