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, 2008, 2009 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
25 #include "opcode/ppc.h"
29 /* Set the endianness we are using. Default to big endian. */
30 #ifndef TARGET_BYTES_BIG_ENDIAN
31 #define TARGET_BYTES_BIG_ENDIAN 1
34 /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling
35 XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling
36 COFF for Windows NT. */
44 /* The target BFD architecture. */
45 #define TARGET_ARCH (ppc_arch ())
46 #define TARGET_MACH (ppc_mach ())
47 extern enum bfd_architecture
ppc_arch (void);
48 extern unsigned long ppc_mach (void);
50 /* Whether or not the target is big endian */
51 extern int target_big_endian
;
53 /* The target BFD format. */
54 #define TARGET_FORMAT (ppc_target_format ())
55 extern char *ppc_target_format (void);
57 /* Permit temporary numeric labels. */
58 #define LOCAL_LABELS_FB 1
60 /* $ is used to refer to the current location. */
63 /* Strings do not use backslash escapes under COFF. */
65 #define NO_STRING_ESCAPES
69 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
72 #if TARGET_BYTES_BIG_ENDIAN
73 #define PPC_BIG_ENDIAN 1
75 #define PPC_BIG_ENDIAN 0
78 /* We don't need to handle .word strangely. */
79 #define WORKING_DOT_WORD
81 #define MAX_MEM_FOR_RS_ALIGN_CODE 4
82 #define HANDLE_ALIGN(FRAGP) \
83 if ((FRAGP)->fr_type == rs_align_code) \
84 ppc_handle_align (FRAGP);
86 extern void ppc_handle_align (struct frag
*);
88 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
90 #define md_frag_check(FRAGP) \
91 if ((FRAGP)->has_code \
92 && (((FRAGP)->fr_address + (FRAGP)->insn_addr) & 3) != 0) \
93 as_bad_where ((FRAGP)->fr_file, (FRAGP)->fr_line, \
94 _("instruction address is not a multiple of 4"));
96 /* Arrange to store the value of ppc_cpu at the site of a fixup
97 for later use in md_apply_fix. */
103 extern ppc_cpu_t ppc_cpu
;
105 #define TC_FIX_TYPE struct _ppc_fix_extra
106 #define TC_INIT_FIX_DATA(FIXP) \
107 do { (FIXP)->tc_fix_data.ppc_cpu = ppc_cpu; } while (0)
111 /* Question marks are permitted in symbol names. */
114 /* Don't adjust TOC relocs. */
115 #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX)
116 extern int ppc_pe_fix_adjustable (struct fix
*);
122 /* Declarations needed when generating XCOFF code. XCOFF is an
123 extension of COFF, used only on the RS/6000. Rather than create an
124 obj-xcoff, we just use obj-coff, and handle the extensions here in
127 /* We need to keep some information for symbols. */
130 /* We keep a few linked lists of symbols. */
132 /* Non-zero if the symbol should be output. The RS/6000 assembler
133 only outputs symbols that are external or are mentioned in a
134 .globl or .lglobl statement. */
136 /* The symbol class. */
138 /* The real name, if the symbol was renamed. */
140 /* For a csect symbol, the subsegment we are using. This is zero
141 for symbols that are not csects. */
143 /* For a csect or common symbol, the alignment to use. */
145 /* For a function symbol, a symbol whose value is the size. The
146 field is NULL if there is no size. */
148 /* For a csect symbol, the last symbol which has been defined in
149 this csect, or NULL if none have been defined so far. For a .bs
150 symbol, the referenced csect symbol. */
154 #define TC_SYMFIELD_TYPE struct ppc_tc_sy
156 /* We need an additional auxent for function symbols. */
157 #define OBJ_COFF_MAX_AUXENTRIES 2
159 /* Square and curly brackets are permitted in symbol names. */
162 /* Canonicalize the symbol name. */
163 #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name)
164 extern char *ppc_canonicalize_symbol_name (char *);
166 /* Get the symbol class from the name. */
167 #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym)
168 extern void ppc_symbol_new_hook (symbolS
*);
170 /* Set the symbol class of a label based on the csect. */
171 #define tc_frob_label(sym) ppc_frob_label (sym)
172 extern void ppc_frob_label (symbolS
*);
174 /* TOC relocs requires special handling. */
175 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
176 extern int ppc_fix_adjustable (struct fix
*);
178 /* We need to set the section VMA. */
179 #define tc_frob_section(sec) ppc_frob_section (sec)
180 extern void ppc_frob_section (asection
*);
182 /* Finish up the symbol. */
183 #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym)
184 extern int ppc_frob_symbol (symbolS
*);
186 /* Finish up the entire symtab. */
187 #define tc_adjust_symtab() ppc_adjust_symtab ()
188 extern void ppc_adjust_symtab (void);
190 /* We also need to copy, in particular, the class of the symbol,
191 over what obj-coff would otherwise have copied. */
192 #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \
194 if (SF_GET_GET_SEGMENT (dest)) \
195 S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \
196 symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \
197 symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \
198 symbol_get_tc (dest)->symbol_class = symbol_get_tc (src)->symbol_class; \
199 symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \
202 #endif /* OBJ_XCOFF */
204 extern const char ppc_symbol_chars
[];
205 #define tc_symbol_chars ppc_symbol_chars
209 /* Support for SHT_ORDERED */
210 extern int ppc_section_type (char *, size_t);
211 extern int ppc_section_flags (flagword
, bfd_vma
, int);
213 #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN)
214 #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE)
216 #define tc_comment_chars ppc_comment_chars
217 extern const char *ppc_comment_chars
;
219 /* Keep relocations relative to the GOT, or non-PC relative. */
220 #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX)
221 extern int ppc_fix_adjustable (struct fix
*);
223 /* Values passed to md_apply_fix don't include symbol values. */
224 #define MD_APPLY_SYM_VALUE(FIX) 0
226 #define tc_frob_file_before_adjust ppc_frob_file_before_adjust
227 extern void ppc_frob_file_before_adjust (void);
231 #if defined (OBJ_ELF) || defined (OBJ_XCOFF)
232 #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX)
233 extern int ppc_force_relocation (struct fix
*);
236 /* call md_pcrel_from_section, not md_pcrel_from */
237 #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC)
238 extern long md_pcrel_from_section (struct fix
*, segT
);
240 #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp)
241 extern int ppc_parse_name (const char *, struct expressionS
*);
243 #define md_operand(x)
245 #define md_cleanup() ppc_cleanup ()
246 extern void ppc_cleanup (void);
248 /* ppc uses different register numbers between .eh_frame and .debug_frame.
249 This macro translates the .eh_frame register numbers to .debug_frame
251 #define md_reg_eh_frame_to_debug_frame(regno) \
252 ((regno) == 70 ? 64 /* cr2 */ : (regno))
254 #define TARGET_USE_CFIPOP 1
256 #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions
257 extern void ppc_cfi_frame_initial_instructions (void);
259 #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum
260 extern int tc_ppc_regname_to_dw2regnum (char *);
262 extern int ppc_cie_data_alignment
;
264 #define DWARF2_LINE_MIN_INSN_LENGTH 4
265 #define DWARF2_DEFAULT_RETURN_COLUMN 0x41
266 #define DWARF2_CIE_DATA_ALIGNMENT ppc_cie_data_alignment
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