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, 2006, 2007 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 25struct 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 ()) 45extern enum bfd_architecture ppc_arch (void); 46extern unsigned long ppc_mach (void); 47 48/* Whether or not the target is big endian */ 49extern int target_big_endian; 50 51/* The target BFD format. */ 52#define TARGET_FORMAT (ppc_target_format ()) 53extern char *ppc_target_format (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 ppc_handle_align (FRAGP); 83 84extern void ppc_handle_align (struct frag *); 85 86#define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0 87 88#define md_frag_check(FRAGP) \ 89 if ((FRAGP)->has_code \ 90 && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0) \ 91 as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \ 92 _("instruction address is not a multiple of 4")); 93 94#ifdef TE_PE 95 96/* Question marks are permitted in symbol names. */ 97#define LEX_QM 1 98 99/* Don't adjust TOC relocs. */ 100#define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) 101extern int ppc_pe_fix_adjustable (struct fix *); 102 103#endif 104 105#ifdef OBJ_XCOFF 106 107/* Declarations needed when generating XCOFF code. XCOFF is an 108 extension of COFF, used only on the RS/6000. Rather than create an 109 obj-xcoff, we just use obj-coff, and handle the extensions here in 110 tc-ppc. */ 111 112/* We need to keep some information for symbols. */ 113struct ppc_tc_sy 114{ 115 /* We keep a few linked lists of symbols. */ 116 symbolS *next; 117 /* Non-zero if the symbol should be output. The RS/6000 assembler 118 only outputs symbols that are external or are mentioned in a 119 .globl or .lglobl statement. */ 120 int output; 121 /* The symbol class. */ 122 int class; 123 /* The real name, if the symbol was renamed. */ 124 char *real_name; 125 /* For a csect symbol, the subsegment we are using. This is zero 126 for symbols that are not csects. */ 127 subsegT subseg; 128 /* For a csect or common symbol, the alignment to use. */ 129 int align; 130 /* For a function symbol, a symbol whose value is the size. The 131 field is NULL if there is no size. */ 132 symbolS *size; 133 /* For a csect symbol, the last symbol which has been defined in 134 this csect, or NULL if none have been defined so far. For a .bs 135 symbol, the referenced csect symbol. */ 136 symbolS *within; 137}; 138 139#define TC_SYMFIELD_TYPE struct ppc_tc_sy 140 141/* We need an additional auxent for function symbols. */ 142#define OBJ_COFF_MAX_AUXENTRIES 2 143 144/* Square and curly brackets are permitted in symbol names. */ 145#define LEX_BR 3 146 147/* Canonicalize the symbol name. */ 148#define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) 149extern char *ppc_canonicalize_symbol_name (char *); 150 151/* Get the symbol class from the name. */ 152#define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) 153extern void ppc_symbol_new_hook (symbolS *); 154 155/* Set the symbol class of a label based on the csect. */ 156#define tc_frob_label(sym) ppc_frob_label (sym) 157extern void ppc_frob_label (symbolS *); 158 159/* TOC relocs requires special handling. */ 160#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 161extern int ppc_fix_adjustable (struct fix *); 162 163/* We need to set the section VMA. */ 164#define tc_frob_section(sec) ppc_frob_section (sec) 165extern void ppc_frob_section (asection *); 166 167/* Finish up the symbol. */ 168#define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) 169extern int ppc_frob_symbol (symbolS *); 170 171/* Finish up the entire symtab. */ 172#define tc_adjust_symtab() ppc_adjust_symtab () 173extern void ppc_adjust_symtab (void); 174 175/* We also need to copy, in particular, the class of the symbol, 176 over what obj-coff would otherwise have copied. */ 177#define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ 178do { \ 179 if (SF_GET_GET_SEGMENT (dest)) \ 180 S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ 181 symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \ 182 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ 183 symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \ 184 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ 185} while (0) 186 187#endif /* OBJ_XCOFF */ 188 189extern const char ppc_symbol_chars[]; 190#define tc_symbol_chars ppc_symbol_chars 191 192#ifdef OBJ_ELF 193 194/* Support for SHF_EXCLUDE and SHT_ORDERED */ 195extern int ppc_section_letter (int, char **); 196extern int ppc_section_type (char *, size_t); 197extern int ppc_section_word (char *, size_t); 198extern int ppc_section_flags (int, int, int); 199 200#define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG) 201#define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) 202#define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN) 203#define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) 204 205#define tc_comment_chars ppc_comment_chars 206extern const char *ppc_comment_chars; 207 208/* Keep relocations relative to the GOT, or non-PC relative. */ 209#define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) 210extern int ppc_fix_adjustable (struct fix *); 211 212/* Values passed to md_apply_fix don't include symbol values. */ 213#define MD_APPLY_SYM_VALUE(FIX) 0 214 215#define tc_frob_file_before_adjust ppc_frob_file_before_adjust 216extern void ppc_frob_file_before_adjust (void); 217 218#endif /* OBJ_ELF */ 219 220#if defined (OBJ_ELF) || defined (OBJ_XCOFF) 221#define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) 222extern int ppc_force_relocation (struct fix *); 223#endif 224 225/* call md_pcrel_from_section, not md_pcrel_from */ 226#define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) 227extern long md_pcrel_from_section (struct fix *, segT); 228 229#define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) 230extern int ppc_parse_name (const char *, struct expressionS *); 231 232#define md_operand(x) 233 234#define md_cleanup() ppc_cleanup () 235extern void ppc_cleanup (void); 236 237#define TARGET_USE_CFIPOP 1 238 239#define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions 240extern void ppc_cfi_frame_initial_instructions (void); 241 242#define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum 243extern int tc_ppc_regname_to_dw2regnum (char *); 244 245extern int ppc_cie_data_alignment; 246 247#define DWARF2_LINE_MIN_INSN_LENGTH 4 248#define DWARF2_DEFAULT_RETURN_COLUMN 0x41 249#define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment 250