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.
6 This file is part of GAS, the GNU Assembler.
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 3, or (at your option)
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.
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
27 /* Set the endianness we are using. Default to big endian. */
28 #ifndef TARGET_BYTES_BIG_ENDIAN
29 #define TARGET_BYTES_BIG_ENDIAN 1
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. */
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);
48 /* Whether or not the target is big endian */
49 extern int target_big_endian
;
51 /* The target BFD format. */
52 #define TARGET_FORMAT (ppc_target_format ())
53 extern char *ppc_target_format (void);
55 /* Permit temporary numeric labels. */
56 #define LOCAL_LABELS_FB 1
58 /* $ is used to refer to the current location. */
61 /* Strings do not use backslash escapes under COFF. */
63 #define NO_STRING_ESCAPES
67 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
70 #if TARGET_BYTES_BIG_ENDIAN
71 #define PPC_BIG_ENDIAN 1
73 #define PPC_BIG_ENDIAN 0
76 /* We don't need to handle .word strangely. */
77 #define WORKING_DOT_WORD
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);
84 extern void ppc_handle_align (struct frag
*);
86 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
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"));
96 /* Question marks are permitted in symbol names. */
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
*);
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
112 /* We need to keep some information for symbols. */
115 /* We keep a few linked lists of symbols. */
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. */
121 /* The symbol class. */
123 /* The real name, if the symbol was renamed. */
125 /* For a csect symbol, the subsegment we are using. This is zero
126 for symbols that are not csects. */
128 /* For a csect or common symbol, the alignment to use. */
130 /* For a function symbol, a symbol whose value is the size. The
131 field is NULL if there is no 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. */
139 #define TC_SYMFIELD_TYPE struct ppc_tc_sy
141 /* We need an additional auxent for function symbols. */
142 #define OBJ_COFF_MAX_AUXENTRIES 2
144 /* Square and curly brackets are permitted in symbol names. */
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 *);
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
*);
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
*);
159 /* TOC relocs requires special handling. */
160 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
161 extern int ppc_fix_adjustable (struct fix
*);
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
*);
167 /* Finish up the symbol. */
168 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
169 extern int ppc_frob_symbol (symbolS
*);
171 /* Finish up the entire symtab. */
172 #define tc_adjust_symtab() ppc_adjust_symtab ()
173 extern void ppc_adjust_symtab (void);
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) \
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; \
187 #endif /* OBJ_XCOFF */
189 extern const char ppc_symbol_chars
[];
190 #define tc_symbol_chars ppc_symbol_chars
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);
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)
205 #define tc_comment_chars ppc_comment_chars
206 extern const char *ppc_comment_chars
;
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
*);
212 /* Values passed to md_apply_fix don't include symbol values. */
213 #define MD_APPLY_SYM_VALUE(FIX) 0
215 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust
216 extern void ppc_frob_file_before_adjust (void);
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
*);
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
);
229 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
230 extern int ppc_parse_name (const char *, struct expressionS
*);
232 #define md_operand(x)
234 #define md_cleanup() ppc_cleanup ()
235 extern void ppc_cleanup (void);
237 #define TARGET_USE_CFIPOP 1
239 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
240 extern void ppc_cfi_frame_initial_instructions (void);
242 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
243 extern int tc_ppc_regname_to_dw2regnum (char *);
245 extern int ppc_cie_data_alignment
;
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
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