| 1 | /* tc-ppc.h -- Header file for tc-ppc.c.
|
|---|
| 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
|
|---|
| 3 | 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, 59 Temple Place - Suite 330, Boston, MA
|
|---|
| 21 | 02111-1307, USA. */
|
|---|
| 22 |
|
|---|
| 23 | #define TC_PPC
|
|---|
| 24 |
|
|---|
| 25 | #ifdef ANSI_PROTOTYPES
|
|---|
| 26 | struct fix;
|
|---|
| 27 | #endif
|
|---|
| 28 |
|
|---|
| 29 | /* Set the endianness we are using. Default to big endian. */
|
|---|
| 30 | #ifndef TARGET_BYTES_BIG_ENDIAN
|
|---|
| 31 | #define TARGET_BYTES_BIG_ENDIAN 1
|
|---|
| 32 | #endif
|
|---|
| 33 |
|
|---|
| 34 | #ifndef BFD_ASSEMBLER
|
|---|
| 35 | #error PowerPC support requires BFD_ASSEMBLER
|
|---|
| 36 | #endif
|
|---|
| 37 |
|
|---|
| 38 | /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
|
|---|
| 39 | XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
|
|---|
| 40 | COFF for Windows NT. */
|
|---|
| 41 |
|
|---|
| 42 | #ifdef OBJ_COFF
|
|---|
| 43 | #ifndef TE_PE
|
|---|
| 44 | #define OBJ_XCOFF
|
|---|
| 45 | #endif
|
|---|
| 46 | #endif
|
|---|
| 47 |
|
|---|
| 48 | /* The target BFD architecture. */
|
|---|
| 49 | #define TARGET_ARCH (ppc_arch ())
|
|---|
| 50 | #define TARGET_MACH (ppc_mach ())
|
|---|
| 51 | extern enum bfd_architecture ppc_arch PARAMS ((void));
|
|---|
| 52 | extern unsigned long ppc_mach PARAMS ((void));
|
|---|
| 53 |
|
|---|
| 54 | /* Whether or not the target is big endian */
|
|---|
| 55 | extern int target_big_endian;
|
|---|
| 56 |
|
|---|
| 57 | /* The target BFD format. */
|
|---|
| 58 | #define TARGET_FORMAT (ppc_target_format ())
|
|---|
| 59 | extern char *ppc_target_format PARAMS ((void));
|
|---|
| 60 |
|
|---|
| 61 | /* Permit temporary numeric labels. */
|
|---|
| 62 | #define LOCAL_LABELS_FB 1
|
|---|
| 63 |
|
|---|
| 64 | /* $ is used to refer to the current location. */
|
|---|
| 65 | #define DOLLAR_DOT
|
|---|
| 66 |
|
|---|
| 67 | /* Strings do not use backslash escapes under COFF. */
|
|---|
| 68 | #ifdef OBJ_COFF
|
|---|
| 69 | #define NO_STRING_ESCAPES
|
|---|
| 70 | #endif
|
|---|
| 71 |
|
|---|
| 72 | #ifdef OBJ_ELF
|
|---|
| 73 | #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
|
|---|
| 74 | #endif
|
|---|
| 75 |
|
|---|
| 76 | #if TARGET_BYTES_BIG_ENDIAN
|
|---|
| 77 | #define PPC_BIG_ENDIAN 1
|
|---|
| 78 | #else
|
|---|
| 79 | #define PPC_BIG_ENDIAN 0
|
|---|
| 80 | #endif
|
|---|
| 81 |
|
|---|
| 82 | /* We don't need to handle .word strangely. */
|
|---|
| 83 | #define WORKING_DOT_WORD
|
|---|
| 84 |
|
|---|
| 85 | #define MAX_MEM_FOR_RS_ALIGN_CODE 4
|
|---|
| 86 | #define HANDLE_ALIGN(FRAGP) \
|
|---|
| 87 | if ((FRAGP)->fr_type == rs_align_code) \
|
|---|
| 88 | { \
|
|---|
| 89 | valueT count = ((FRAGP)->fr_next->fr_address \
|
|---|
| 90 | - ((FRAGP)->fr_address + (FRAGP)->fr_fix)); \
|
|---|
| 91 | if (count != 0 && (count & 3) == 0) \
|
|---|
| 92 | { \
|
|---|
| 93 | unsigned char *dest = (FRAGP)->fr_literal + (FRAGP)->fr_fix; \
|
|---|
| 94 | \
|
|---|
| 95 | (FRAGP)->fr_var = 4; \
|
|---|
| 96 | if (target_big_endian) \
|
|---|
| 97 | { \
|
|---|
| 98 | *dest++ = 0x60; \
|
|---|
| 99 | *dest++ = 0; \
|
|---|
| 100 | *dest++ = 0; \
|
|---|
| 101 | *dest++ = 0; \
|
|---|
| 102 | } \
|
|---|
| 103 | else \
|
|---|
| 104 | { \
|
|---|
| 105 | *dest++ = 0; \
|
|---|
| 106 | *dest++ = 0; \
|
|---|
| 107 | *dest++ = 0; \
|
|---|
| 108 | *dest++ = 0x60; \
|
|---|
| 109 | } \
|
|---|
| 110 | } \
|
|---|
| 111 | }
|
|---|
| 112 |
|
|---|
| 113 | |
|---|
| 114 |
|
|---|
| 115 | #ifdef TE_PE
|
|---|
| 116 |
|
|---|
| 117 | /* Question marks are permitted in symbol names. */
|
|---|
| 118 | #define LEX_QM 1
|
|---|
| 119 |
|
|---|
| 120 | /* Don't adjust TOC relocs. */
|
|---|
| 121 | #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
|
|---|
| 122 | extern int ppc_pe_fix_adjustable PARAMS ((struct fix *));
|
|---|
| 123 |
|
|---|
| 124 | #endif
|
|---|
| 125 |
|
|---|
| 126 | #ifdef OBJ_XCOFF
|
|---|
| 127 |
|
|---|
| 128 | /* Declarations needed when generating XCOFF code. XCOFF is an
|
|---|
| 129 | extension of COFF, used only on the RS/6000. Rather than create an
|
|---|
| 130 | obj-xcoff, we just use obj-coff, and handle the extensions here in
|
|---|
| 131 | tc-ppc. */
|
|---|
| 132 |
|
|---|
| 133 | /* We need to keep some information for symbols. */
|
|---|
| 134 | struct ppc_tc_sy
|
|---|
| 135 | {
|
|---|
| 136 | /* We keep a few linked lists of symbols. */
|
|---|
| 137 | symbolS *next;
|
|---|
| 138 | /* Non-zero if the symbol should be output. The RS/6000 assembler
|
|---|
| 139 | only outputs symbols that are external or are mentioned in a
|
|---|
| 140 | .globl or .lglobl statement. */
|
|---|
| 141 | int output;
|
|---|
| 142 | /* The symbol class. */
|
|---|
| 143 | int class;
|
|---|
| 144 | /* The real name, if the symbol was renamed. */
|
|---|
| 145 | char *real_name;
|
|---|
| 146 | /* For a csect symbol, the subsegment we are using. This is zero
|
|---|
| 147 | for symbols that are not csects. */
|
|---|
| 148 | subsegT subseg;
|
|---|
| 149 | /* For a csect or common symbol, the alignment to use. */
|
|---|
| 150 | int align;
|
|---|
| 151 | /* For a function symbol, a symbol whose value is the size. The
|
|---|
| 152 | field is NULL if there is no size. */
|
|---|
| 153 | symbolS *size;
|
|---|
| 154 | /* For a csect symbol, the last symbol which has been defined in
|
|---|
| 155 | this csect, or NULL if none have been defined so far. For a .bs
|
|---|
| 156 | symbol, the referenced csect symbol. */
|
|---|
| 157 | symbolS *within;
|
|---|
| 158 | };
|
|---|
| 159 |
|
|---|
| 160 | #define TC_SYMFIELD_TYPE struct ppc_tc_sy
|
|---|
| 161 |
|
|---|
| 162 | /* We need an additional auxent for function symbols. */
|
|---|
| 163 | #define OBJ_COFF_MAX_AUXENTRIES 2
|
|---|
| 164 |
|
|---|
| 165 | /* Square and curly brackets are permitted in symbol names. */
|
|---|
| 166 | #define LEX_BR 3
|
|---|
| 167 |
|
|---|
| 168 | /* Canonicalize the symbol name. */
|
|---|
| 169 | #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
|
|---|
| 170 | extern char *ppc_canonicalize_symbol_name PARAMS ((char *));
|
|---|
| 171 |
|
|---|
| 172 | /* Get the symbol class from the name. */
|
|---|
| 173 | #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
|
|---|
| 174 | extern void ppc_symbol_new_hook PARAMS ((symbolS *));
|
|---|
| 175 |
|
|---|
| 176 | /* Set the symbol class of a label based on the csect. */
|
|---|
| 177 | #define tc_frob_label(sym) ppc_frob_label (sym)
|
|---|
| 178 | extern void ppc_frob_label PARAMS ((symbolS *));
|
|---|
| 179 |
|
|---|
| 180 | /* TOC relocs requires special handling. */
|
|---|
| 181 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
|
|---|
| 182 | extern int ppc_fix_adjustable PARAMS ((struct fix *));
|
|---|
| 183 |
|
|---|
| 184 | /* We need to set the section VMA. */
|
|---|
| 185 | #define tc_frob_section(sec) ppc_frob_section (sec)
|
|---|
| 186 | extern void ppc_frob_section PARAMS ((asection *));
|
|---|
| 187 |
|
|---|
| 188 | /* Finish up the symbol. */
|
|---|
| 189 | #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
|
|---|
| 190 | extern int ppc_frob_symbol PARAMS ((symbolS *));
|
|---|
| 191 |
|
|---|
| 192 | /* Finish up the entire symtab. */
|
|---|
| 193 | #define tc_adjust_symtab() ppc_adjust_symtab ()
|
|---|
| 194 | extern void ppc_adjust_symtab PARAMS ((void));
|
|---|
| 195 |
|
|---|
| 196 | /* We also need to copy, in particular, the class of the symbol,
|
|---|
| 197 | over what obj-coff would otherwise have copied. */
|
|---|
| 198 | #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
|
|---|
| 199 | do { \
|
|---|
| 200 | if (SF_GET_GET_SEGMENT (dest)) \
|
|---|
| 201 | S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
|
|---|
| 202 | symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \
|
|---|
| 203 | symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
|
|---|
| 204 | symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \
|
|---|
| 205 | symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
|
|---|
| 206 | } while (0)
|
|---|
| 207 |
|
|---|
| 208 | #endif /* OBJ_XCOFF */
|
|---|
| 209 |
|
|---|
| 210 | #ifdef OBJ_ELF
|
|---|
| 211 |
|
|---|
| 212 | /* Support for SHF_EXCLUDE and SHT_ORDERED */
|
|---|
| 213 | extern int ppc_section_letter PARAMS ((int, char **));
|
|---|
| 214 | extern int ppc_section_type PARAMS ((char *, size_t));
|
|---|
| 215 | extern int ppc_section_word PARAMS ((char *, size_t));
|
|---|
| 216 | extern int ppc_section_flags PARAMS ((int, int, int));
|
|---|
| 217 |
|
|---|
| 218 | #define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG)
|
|---|
| 219 | #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
|
|---|
| 220 | #define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN)
|
|---|
| 221 | #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
|
|---|
| 222 |
|
|---|
| 223 | /* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a
|
|---|
| 224 | normal section, and not a bss section so that the linker doesn't crater
|
|---|
| 225 | when trying to make more than 2 sections. */
|
|---|
| 226 | #define ELF_TC_SPECIAL_SECTIONS \
|
|---|
| 227 | { ".tags", SHT_ORDERED, SHF_ALLOC }, \
|
|---|
| 228 | { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \
|
|---|
| 229 | { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \
|
|---|
| 230 | { ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \
|
|---|
| 231 | { ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \
|
|---|
| 232 | { ".PPC.EMB.apuinfo", SHT_NOTE, 0 }, \
|
|---|
| 233 | { ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \
|
|---|
| 234 | { ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC }, \
|
|---|
| 235 | /* Extra sections for 64-bit ELF PPC. */ \
|
|---|
| 236 | { ".toc", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE}, \
|
|---|
| 237 | { ".tocbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE},
|
|---|
| 238 |
|
|---|
| 239 | #define tc_comment_chars ppc_comment_chars
|
|---|
| 240 | extern const char *ppc_comment_chars;
|
|---|
| 241 |
|
|---|
| 242 | /* Keep relocations relative to the GOT, or non-PC relative. */
|
|---|
| 243 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
|
|---|
| 244 | extern int ppc_fix_adjustable PARAMS ((struct fix *));
|
|---|
| 245 |
|
|---|
| 246 | /* Values passed to md_apply_fix3 don't include symbol values. */
|
|---|
| 247 | #define MD_APPLY_SYM_VALUE(FIX) 0
|
|---|
| 248 |
|
|---|
| 249 | #define tc_frob_file_before_adjust ppc_frob_file_before_adjust
|
|---|
| 250 | extern void ppc_frob_file_before_adjust PARAMS ((void));
|
|---|
| 251 |
|
|---|
| 252 | #define DWARF2_LINE_MIN_INSN_LENGTH 4
|
|---|
| 253 | #endif /* OBJ_ELF */
|
|---|
| 254 |
|
|---|
| 255 | #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
|
|---|
| 256 | extern int ppc_force_relocation PARAMS ((struct fix *));
|
|---|
| 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 PARAMS ((struct fix *, segT));
|
|---|
| 261 |
|
|---|
| 262 | #define md_parse_name(name, exp, c) ppc_parse_name (name, exp)
|
|---|
| 263 | extern int ppc_parse_name PARAMS ((const char *, struct expressionS *));
|
|---|
| 264 |
|
|---|
| 265 | #define md_operand(x)
|
|---|
| 266 |
|
|---|
| 267 | #define md_cleanup() ppc_cleanup ()
|
|---|
| 268 | extern void ppc_cleanup PARAMS ((void));
|
|---|
