1 /* tc-ppc.h -- Header file for tc-ppc.c. 2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 3 2004, 2005 Free Software Foundation, Inc. 4 Written by Ian Lance Taylor, Cygnus Support. 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 the Free 20 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 21 02110-1301, USA. */ 22 23 #define TC_PPC 24 25 struct fix; 26 27 /* Set the endianness we are using. Default to big endian. */ 28 #ifndef TARGET_BYTES_BIG_ENDIAN 29 #define TARGET_BYTES_BIG_ENDIAN 1 30 #endif 31 32 /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling 33 XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling 34 COFF for Windows NT. */ 35 36 #ifdef OBJ_COFF 37 #ifndef TE_PE 38 #define OBJ_XCOFF 39 #endif 40 #endif 41 42 /* The target BFD architecture. */ 43 #define TARGET_ARCH (ppc_arch ()) 44 #define TARGET_MACH (ppc_mach ()) 45 extern enum bfd_architecture ppc_arch PARAMS ((void)); 46 extern unsigned long ppc_mach PARAMS ((void)); 47 48 /* Whether or not the target is big endian */ 49 extern int target_big_endian; 50 51 /* The target BFD format. */ 52 #define TARGET_FORMAT (ppc_target_format ()) 53 extern char *ppc_target_format PARAMS ((void)); 54 55 /* Permit temporary numeric labels. */ 56 #define LOCAL_LABELS_FB 1 57 58 /* $ is used to refer to the current location. */ 59 #define DOLLAR_DOT 60 61 /* Strings do not use backslash escapes under COFF. */ 62 #ifdef OBJ_COFF 63 #define NO_STRING_ESCAPES 64 #endif 65 66 #ifdef OBJ_ELF 67 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */ 68 #endif 69 70 #if TARGET_BYTES_BIG_ENDIAN 71 #define PPC_BIG_ENDIAN 1 72 #else 73 #define PPC_BIG_ENDIAN 0 74 #endif 75 76 /* We don't need to handle .word strangely. */ 77 #define WORKING_DOT_WORD 78 79 #define MAX_MEM_FOR_RS_ALIGN_CODE 4 80 #define HANDLE_ALIGN(FRAGP) \ 81 if ((FRAGP)->fr_type == rs_align_code) \ 82 { \ 83 valueT count = ((FRAGP)->fr_next->fr_address \ 84 - ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \ 85 if (count != 0 && (count & 3) == 0) \ 86 { \ 87 char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \ 88 \ 89 (FRAGP)->fr_var = 4; \ 90 if (target_big_endian) \ 91 { \ 92 *dest++ = 0x60; \ 93 *dest++ = 0; \ 94 *dest++ = 0; \ 95 *dest++ = 0; \ 96 } \ 97 else \ 98 { \ 99 *dest++ = 0; \ 100 *dest++ = 0; \ 101 *dest++ = 0; \ 102 *dest++ = 0x60; \ 103 } \ 104 } \ 105 } 106 107 #define md_frag_check(FRAGP) \ 108 if ((FRAGP)->has_code \ 109 && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0) \ 110 as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \ 111 _("instruction address is not a multiple of 4")); 112 113 #ifdef TE_PE 114 115 /* Question marks are permitted in symbol names. */ 116 #define LEX_QM 1 117 118 /* Don't adjust TOC relocs. */ 119 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) 120 extern int ppc_pe_fix_adjustable PARAMS ((struct fix *)); 121 122 #endif 123 124 #ifdef OBJ_XCOFF 125 126 /* Declarations needed when generating XCOFF code. XCOFF is an 127 extension of COFF, used only on the RS/6000. Rather than create an 128 obj-xcoff, we just use obj-coff, and handle the extensions here in 129 tc-ppc. */ 130 131 /* We need to keep some information for symbols. */ 132 struct ppc_tc_sy 133 { 134 /* We keep a few linked lists of symbols. */ 135 symbolS *next; 136 /* Non-zero if the symbol should be output. The RS/6000 assembler 137 only outputs symbols that are external or are mentioned in a 138 .globl or .lglobl statement. */ 139 int output; 140 /* The symbol class. */ 141 int class; 142 /* The real name, if the symbol was renamed. */ 143 char *real_name; 144 /* For a csect symbol, the subsegment we are using. This is zero 145 for symbols that are not csects. */ 146 subsegT subseg; 147 /* For a csect or common symbol, the alignment to use. */ 148 int align; 149 /* For a function symbol, a symbol whose value is the size. The 150 field is NULL if there is no size. */ 151 symbolS *size; 152 /* For a csect symbol, the last symbol which has been defined in 153 this csect, or NULL if none have been defined so far. For a .bs 154 symbol, the referenced csect symbol. */ 155 symbolS *within; 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 PARAMS ((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 PARAMS ((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 PARAMS ((symbolS *)); 177 178 /* TOC relocs requires special handling. */ 179 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 180 extern int ppc_fix_adjustable PARAMS ((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 PARAMS ((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 PARAMS ((symbolS *)); 189 190 /* Finish up the entire symtab. */ 191 #define tc_adjust_symtab() ppc_adjust_symtab () 192 extern void ppc_adjust_symtab PARAMS ((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)->size = symbol_get_tc (src)->size; \ 201 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ 202 symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \ 203 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ 204 } while (0) 205 206 #endif /* OBJ_XCOFF */ 207 208 extern const char ppc_symbol_chars[]; 209 #define tc_symbol_chars ppc_symbol_chars 210 211 #ifdef OBJ_ELF 212 213 /* Support for SHF_EXCLUDE and SHT_ORDERED */ 214 extern int ppc_section_letter PARAMS ((int, char **)); 215 extern int ppc_section_type PARAMS ((char *, size_t)); 216 extern int ppc_section_word PARAMS ((char *, size_t)); 217 extern int ppc_section_flags PARAMS ((int, int, int)); 218 219 #define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG) 220 #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) 221 #define md_elf_section_word(STR, LEN) ppc_section_word (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 PARAMS ((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_frob_file_before_adjust ppc_frob_file_before_adjust 235 extern void ppc_frob_file_before_adjust PARAMS ((void)); 236 237 #endif /* OBJ_ELF */ 238 239 #if defined (OBJ_ELF) || defined (OBJ_XCOFF) 240 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) 241 extern int ppc_force_relocation PARAMS ((struct fix *)); 242 #endif 243 244 /* call md_pcrel_from_section, not md_pcrel_from */ 245 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) 246 extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); 247 248 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) 249 extern int ppc_parse_name PARAMS ((const char *, struct expressionS *)); 250 251 #define md_operand(x) 252 253 #define md_cleanup() ppc_cleanup () 254 extern void ppc_cleanup PARAMS ((void)); 255 256 #define TARGET_USE_CFIPOP 1 257 258 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions 259 extern void ppc_cfi_frame_initial_instructions PARAMS ((void)); 260 261 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum 262 extern int tc_ppc_regname_to_dw2regnum PARAMS ((const char *regname)); 263 264 extern int ppc_cie_data_alignment; 265 266 #define DWARF2_LINE_MIN_INSN_LENGTH 4 267 #define DWARF2_DEFAULT_RETURN_COLUMN 0x41 268 #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment 269