1 /* tc-ppc.h -- Header file for tc-ppc.c. 2 Copyright (C) 1994-2014 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 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 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 89 90 #define md_frag_check(FRAGP) ppc_frag_check (FRAGP) 91 92 /* Arrange to store the value of ppc_cpu at the site of a fixup 93 for later use in md_apply_fix. */ 94 struct _ppc_fix_extra 95 { 96 ppc_cpu_t ppc_cpu; 97 }; 98 99 extern ppc_cpu_t ppc_cpu; 100 101 #define TC_FIX_TYPE struct _ppc_fix_extra 102 #define TC_INIT_FIX_DATA(FIXP) \ 103 do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0) 104 105 #ifdef TE_PE 106 107 /* Question marks are permitted in symbol names. */ 108 #define LEX_QM 1 109 110 /* Don't adjust TOC relocs. */ 111 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) 112 extern int ppc_pe_fix_adjustable (struct fix *); 113 114 #endif 115 116 #ifdef OBJ_XCOFF 117 118 /* Declarations needed when generating XCOFF code. XCOFF is an 119 extension of COFF, used only on the RS/6000. Rather than create an 120 obj-xcoff, we just use obj-coff, and handle the extensions here in 121 tc-ppc. */ 122 123 /* We need to keep some information for symbols. */ 124 struct ppc_tc_sy 125 { 126 /* We keep a few linked lists of symbols. */ 127 symbolS *next; 128 /* The real name, if the symbol was renamed. */ 129 char *real_name; 130 /* Non-zero if the symbol should be output. The RS/6000 assembler 131 only outputs symbols that are external or are mentioned in a 132 .globl or .lglobl statement. */ 133 unsigned char output; 134 /* The symbol class. */ 135 short symbol_class; 136 /* For a csect or common symbol, the alignment to use. */ 137 unsigned char align; 138 /* For a csect symbol, the subsegment we are using. This is zero 139 for symbols that are not csects. */ 140 subsegT subseg; 141 /* For a csect symbol, the last symbol which has been defined in 142 this csect, or NULL if none have been defined so far. 143 For a .bs symbol, the referenced csect symbol. 144 For a label, the enclosing csect. */ 145 symbolS *within; 146 union 147 { 148 /* For a function symbol, a symbol whose value is the size. The 149 field is NULL if there is no size. */ 150 symbolS *size; 151 /* For a dwarf symbol, the corresponding dwarf subsection. */ 152 struct dw_subsection *dw; 153 } u; 154 }; 155 156 #define TC_SYMFIELD_TYPE struct ppc_tc_sy 157 158 /* We need an additional auxent for function symbols. */ 159 #define OBJ_COFF_MAX_AUXENTRIES 2 160 161 /* Square and curly brackets are permitted in symbol names. */ 162 #define LEX_BR 3 163 164 /* Canonicalize the symbol name. */ 165 #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) 166 extern char *ppc_canonicalize_symbol_name (char *); 167 168 /* Get the symbol class from the name. */ 169 #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) 170 extern void ppc_symbol_new_hook (symbolS *); 171 172 /* Set the symbol class of a label based on the csect. */ 173 #define tc_frob_label(sym) ppc_frob_label (sym) 174 extern void ppc_frob_label (symbolS *); 175 176 /* TOC relocs requires special handling. */ 177 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 178 extern int ppc_fix_adjustable (struct fix *); 179 180 /* We need to set the section VMA. */ 181 #define tc_frob_section(sec) ppc_frob_section (sec) 182 extern void ppc_frob_section (asection *); 183 184 /* Finish up the symbol. */ 185 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) 186 extern int ppc_frob_symbol (symbolS *); 187 188 /* Finish up the entire symtab. */ 189 #define tc_adjust_symtab() ppc_adjust_symtab () 190 extern void ppc_adjust_symtab (void); 191 192 /* We also need to copy, in particular, the class of the symbol, 193 over what obj-coff would otherwise have copied. */ 194 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ 195 do { \ 196 if (SF_GET_GET_SEGMENT (dest)) \ 197 S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ 198 symbol_get_tc (dest)->u = symbol_get_tc (src)->u; \ 199 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ 200 symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \ 201 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ 202 } while (0) 203 204 extern void ppc_xcoff_end (void); 205 #define md_end ppc_xcoff_end 206 207 #define tc_new_dot_label(sym) ppc_new_dot_label (sym) 208 extern void ppc_new_dot_label (symbolS *); 209 210 #endif /* OBJ_XCOFF */ 211 212 extern const char ppc_symbol_chars[]; 213 #define tc_symbol_chars ppc_symbol_chars 214 215 #ifdef OBJ_ELF 216 217 /* Support for SHT_ORDERED */ 218 extern int ppc_section_type (char *, size_t); 219 extern int ppc_section_flags (flagword, bfd_vma, int); 220 221 #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) 222 #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) 223 224 #define tc_comment_chars ppc_comment_chars 225 extern const char *ppc_comment_chars; 226 227 /* Keep relocations relative to the GOT, or non-PC relative. */ 228 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 229 extern int ppc_fix_adjustable (struct fix *); 230 231 /* Values passed to md_apply_fix don't include symbol values. */ 232 #define MD_APPLY_SYM_VALUE(FIX) 0 233 234 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) \ 235 ppc_elf_parse_cons (EXP, NBYTES) 236 extern bfd_reloc_code_real_type ppc_elf_parse_cons (expressionS *, 237 unsigned int); 238 #define TC_CONS_FIX_CHECK(EXP, NBYTES, FIX) \ 239 ppc_elf_cons_fix_check (EXP, NBYTES, FIX) 240 extern void ppc_elf_cons_fix_check (expressionS *, unsigned int, struct fix *); 241 242 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust 243 extern void ppc_frob_file_before_adjust (void); 244 245 #define tc_adjust_symtab() ppc_elf_adjust_symtab () 246 extern void ppc_elf_adjust_symtab (void); 247 248 extern void ppc_elf_end (void); 249 #define md_end ppc_elf_end 250 251 #endif /* OBJ_ELF */ 252 253 #if defined (OBJ_ELF) || defined (OBJ_XCOFF) 254 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) 255 extern int ppc_force_relocation (struct fix *); 256 #endif 257 258 /* call md_pcrel_from_section, not md_pcrel_from */ 259 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) 260 extern long md_pcrel_from_section (struct fix *, segT); 261 262 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) 263 extern int ppc_parse_name (const char *, struct expressionS *); 264 265 #define md_operand(x) 266 267 #define md_cleanup() ppc_cleanup () 268 extern void ppc_cleanup (void); 269 270 /* ppc uses different register numbers between .eh_frame and .debug_frame. 271 This macro translates the .eh_frame register numbers to .debug_frame 272 register numbers. */ 273 #define md_reg_eh_frame_to_debug_frame(regno) \ 274 ((regno) == 70 ? 64 /* cr2 */ : (regno)) 275 276 #define TARGET_USE_CFIPOP 1 277 278 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions 279 extern void ppc_cfi_frame_initial_instructions (void); 280 281 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum 282 extern int tc_ppc_regname_to_dw2regnum (char *); 283 284 extern int ppc_cie_data_alignment; 285 286 extern int ppc_dwarf2_line_min_insn_length; 287 288 #define DWARF2_LINE_MIN_INSN_LENGTH ppc_dwarf2_line_min_insn_length 289 #define DWARF2_DEFAULT_RETURN_COLUMN 0x41 290 #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment 291