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252b5132 | 1 | /* tc-ppc.h -- Header file for tc-ppc.c. |
09b935ac | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
98027b10 | 3 | 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
252b5132 RH |
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 | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
252b5132 RH |
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 | |
4b4da160 NC |
20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
21 | 02110-1301, USA. */ | |
252b5132 RH |
22 | |
23 | #define TC_PPC | |
24 | ||
252b5132 | 25 | struct fix; |
252b5132 RH |
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 | ||
252b5132 RH |
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 ()) | |
7f6d05e8 | 44 | #define TARGET_MACH (ppc_mach ()) |
98027b10 AM |
45 | extern enum bfd_architecture ppc_arch (void); |
46 | extern unsigned long ppc_mach (void); | |
252b5132 RH |
47 | |
48 | /* Whether or not the target is big endian */ | |
49 | extern int target_big_endian; | |
50 | ||
51 | /* The target BFD format. */ | |
7f6d05e8 | 52 | #define TARGET_FORMAT (ppc_target_format ()) |
98027b10 | 53 | extern char *ppc_target_format (void); |
252b5132 RH |
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 | ||
0baf16f2 AM |
79 | #define MAX_MEM_FOR_RS_ALIGN_CODE 4 |
80 | #define HANDLE_ALIGN(FRAGP) \ | |
3aeeedbb AM |
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 | |
0baf16f2 | 87 | |
09b935ac AM |
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")); | |
252b5132 RH |
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. */ | |
a161fe53 | 100 | #define tc_fix_adjustable(FIX) ppc_pe_fix_adjustable (FIX) |
98027b10 | 101 | extern int ppc_pe_fix_adjustable (struct fix *); |
252b5132 RH |
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. */ | |
49309057 | 116 | symbolS *next; |
252b5132 RH |
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. */ | |
49309057 | 132 | symbolS *size; |
252b5132 RH |
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. */ | |
49309057 | 136 | symbolS *within; |
252b5132 RH |
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) | |
98027b10 | 149 | extern char *ppc_canonicalize_symbol_name (char *); |
252b5132 RH |
150 | |
151 | /* Get the symbol class from the name. */ | |
152 | #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) | |
98027b10 | 153 | extern void ppc_symbol_new_hook (symbolS *); |
252b5132 RH |
154 | |
155 | /* Set the symbol class of a label based on the csect. */ | |
156 | #define tc_frob_label(sym) ppc_frob_label (sym) | |
98027b10 | 157 | extern void ppc_frob_label (symbolS *); |
252b5132 RH |
158 | |
159 | /* TOC relocs requires special handling. */ | |
a161fe53 | 160 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) |
98027b10 | 161 | extern int ppc_fix_adjustable (struct fix *); |
252b5132 | 162 | |
252b5132 RH |
163 | /* We need to set the section VMA. */ |
164 | #define tc_frob_section(sec) ppc_frob_section (sec) | |
98027b10 | 165 | extern void ppc_frob_section (asection *); |
252b5132 RH |
166 | |
167 | /* Finish up the symbol. */ | |
168 | #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) | |
98027b10 | 169 | extern int ppc_frob_symbol (symbolS *); |
252b5132 RH |
170 | |
171 | /* Finish up the entire symtab. */ | |
172 | #define tc_adjust_symtab() ppc_adjust_symtab () | |
98027b10 | 173 | extern void ppc_adjust_symtab (void); |
252b5132 | 174 | |
2c1c4c62 GK |
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 | ||
252b5132 RH |
187 | #endif /* OBJ_XCOFF */ |
188 | ||
5ce8663f NC |
189 | extern const char ppc_symbol_chars[]; |
190 | #define tc_symbol_chars ppc_symbol_chars | |
191 | ||
252b5132 RH |
192 | #ifdef OBJ_ELF |
193 | ||
252b5132 | 194 | /* Support for SHF_EXCLUDE and SHT_ORDERED */ |
98027b10 AM |
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); | |
252b5132 RH |
199 | |
200 | #define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG) | |
9de8d8f1 RH |
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) | |
252b5132 RH |
203 | #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) |
204 | ||
252b5132 RH |
205 | #define tc_comment_chars ppc_comment_chars |
206 | extern const char *ppc_comment_chars; | |
207 | ||
81d4177b | 208 | /* Keep relocations relative to the GOT, or non-PC relative. */ |
a161fe53 | 209 | #define tc_fix_adjustable(FIX) ppc_fix_adjustable (FIX) |
98027b10 | 210 | extern int ppc_fix_adjustable (struct fix *); |
252b5132 | 211 | |
55cf6793 | 212 | /* Values passed to md_apply_fix don't include symbol values. */ |
a161fe53 | 213 | #define MD_APPLY_SYM_VALUE(FIX) 0 |
252b5132 | 214 | |
7e8d4ab4 | 215 | #define tc_frob_file_before_adjust ppc_frob_file_before_adjust |
98027b10 | 216 | extern void ppc_frob_file_before_adjust (void); |
0baf16f2 | 217 | |
252b5132 RH |
218 | #endif /* OBJ_ELF */ |
219 | ||
5f5c1f75 | 220 | #if defined (OBJ_ELF) || defined (OBJ_XCOFF) |
a161fe53 | 221 | #define TC_FORCE_RELOCATION(FIX) ppc_force_relocation (FIX) |
98027b10 | 222 | extern int ppc_force_relocation (struct fix *); |
5f5c1f75 | 223 | #endif |
a161fe53 | 224 | |
252b5132 | 225 | /* call md_pcrel_from_section, not md_pcrel_from */ |
a161fe53 | 226 | #define MD_PCREL_FROM_SECTION(FIX, SEC) md_pcrel_from_section(FIX, SEC) |
98027b10 | 227 | extern long md_pcrel_from_section (struct fix *, segT); |
252b5132 | 228 | |
9497f5ac | 229 | #define md_parse_name(name, exp, mode, c) ppc_parse_name (name, exp) |
98027b10 | 230 | extern int ppc_parse_name (const char *, struct expressionS *); |
252b5132 RH |
231 | |
232 | #define md_operand(x) | |
6a0c61b7 EZ |
233 | |
234 | #define md_cleanup() ppc_cleanup () | |
98027b10 | 235 | extern void ppc_cleanup (void); |
75e21f08 JJ |
236 | |
237 | #define TARGET_USE_CFIPOP 1 | |
238 | ||
239 | #define tc_cfi_frame_initial_instructions ppc_cfi_frame_initial_instructions | |
98027b10 | 240 | extern void ppc_cfi_frame_initial_instructions (void); |
75e21f08 JJ |
241 | |
242 | #define tc_regname_to_dw2regnum tc_ppc_regname_to_dw2regnum | |
98027b10 | 243 | extern int tc_ppc_regname_to_dw2regnum (char *); |
75e21f08 JJ |
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 |