| 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 | |
| 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 (void); |
| 46 | extern unsigned long ppc_mach (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 (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 | |
| 84 | extern 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 | \f |
| 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) |
| 101 | extern 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. */ |
| 113 | struct 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) |
| 149 | extern 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) |
| 153 | extern 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) |
| 157 | extern void ppc_frob_label (symbolS *); |
| 158 | |
| 159 | /* TOC relocs requires special handling. */ |
| 160 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) |
| 161 | extern 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) |
| 165 | extern void ppc_frob_section (asection *); |
| 166 | |
| 167 | /* Finish up the symbol. */ |
| 168 | #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) |
| 169 | extern int ppc_frob_symbol (symbolS *); |
| 170 | |
| 171 | /* Finish up the entire symtab. */ |
| 172 | #define tc_adjust_symtab() ppc_adjust_symtab () |
| 173 | extern 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) \ |
| 178 | do { \ |
| 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 | |
| 189 | extern 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 */ |
| 195 | extern int ppc_section_letter (int, char **); |
| 196 | extern int ppc_section_type (char *, size_t); |
| 197 | extern int ppc_section_word (char *, size_t); |
| 198 | extern 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 |
| 206 | extern 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) |
| 210 | extern 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 |
| 216 | extern 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) |
| 222 | extern 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) |
| 227 | extern long md_pcrel_from_section (struct fix *, segT); |
| 228 | |
| 229 | #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) |
| 230 | extern int ppc_parse_name (const char *, struct expressionS *); |
| 231 | |
| 232 | #define md_operand(x) |
| 233 | |
| 234 | #define md_cleanup() ppc_cleanup () |
| 235 | extern void ppc_cleanup (void); |
| 236 | |
| 237 | #define TARGET_USE_CFIPOP 1 |
| 238 | |
| 239 | #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions |
| 240 | extern void ppc_cfi_frame_initial_instructions (void); |
| 241 | |
| 242 | #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum |
| 243 | extern int tc_ppc_regname_to_dw2regnum (char *); |
| 244 | |
| 245 | extern 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 |