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252b5132 | 1 | /* tc-ppc.h -- Header file for tc-ppc.c. |
34f63668 | 2 | Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 |
2c1c4c62 | 3 | 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 | |
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 | |
81d4177b | 21 | 02111-1307, USA. */ |
252b5132 RH |
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 ()) | |
7f6d05e8 | 50 | #define TARGET_MACH (ppc_mach ()) |
252b5132 | 51 | extern enum bfd_architecture ppc_arch PARAMS ((void)); |
7f6d05e8 | 52 | extern unsigned long ppc_mach PARAMS ((void)); |
252b5132 RH |
53 | |
54 | /* Whether or not the target is big endian */ | |
55 | extern int target_big_endian; | |
56 | ||
57 | /* The target BFD format. */ | |
7f6d05e8 | 58 | #define TARGET_FORMAT (ppc_target_format ()) |
0baf16f2 | 59 | extern char *ppc_target_format PARAMS ((void)); |
252b5132 RH |
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 | ||
0baf16f2 AM |
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 | ||
252b5132 RH |
113 | \f |
114 | #ifdef TE_PE | |
115 | ||
116 | /* Question marks are permitted in symbol names. */ | |
117 | #define LEX_QM 1 | |
118 | ||
119 | /* Don't adjust TOC relocs. */ | |
120 | #define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp) | |
121 | extern int ppc_pe_fix_adjustable PARAMS ((struct fix *)); | |
122 | ||
123 | #endif | |
124 | ||
125 | #ifdef OBJ_XCOFF | |
126 | ||
127 | /* Declarations needed when generating XCOFF code. XCOFF is an | |
128 | extension of COFF, used only on the RS/6000. Rather than create an | |
129 | obj-xcoff, we just use obj-coff, and handle the extensions here in | |
130 | tc-ppc. */ | |
131 | ||
132 | /* We need to keep some information for symbols. */ | |
133 | struct ppc_tc_sy | |
134 | { | |
135 | /* We keep a few linked lists of symbols. */ | |
49309057 | 136 | symbolS *next; |
252b5132 RH |
137 | /* Non-zero if the symbol should be output. The RS/6000 assembler |
138 | only outputs symbols that are external or are mentioned in a | |
139 | .globl or .lglobl statement. */ | |
140 | int output; | |
141 | /* The symbol class. */ | |
142 | int class; | |
143 | /* The real name, if the symbol was renamed. */ | |
144 | char *real_name; | |
145 | /* For a csect symbol, the subsegment we are using. This is zero | |
146 | for symbols that are not csects. */ | |
147 | subsegT subseg; | |
148 | /* For a csect or common symbol, the alignment to use. */ | |
149 | int align; | |
150 | /* For a function symbol, a symbol whose value is the size. The | |
151 | field is NULL if there is no size. */ | |
49309057 | 152 | symbolS *size; |
252b5132 RH |
153 | /* For a csect symbol, the last symbol which has been defined in |
154 | this csect, or NULL if none have been defined so far. For a .bs | |
155 | symbol, the referenced csect symbol. */ | |
49309057 | 156 | symbolS *within; |
252b5132 RH |
157 | }; |
158 | ||
159 | #define TC_SYMFIELD_TYPE struct ppc_tc_sy | |
160 | ||
161 | /* We need an additional auxent for function symbols. */ | |
162 | #define OBJ_COFF_MAX_AUXENTRIES 2 | |
163 | ||
164 | /* Square and curly brackets are permitted in symbol names. */ | |
165 | #define LEX_BR 3 | |
166 | ||
167 | /* Canonicalize the symbol name. */ | |
168 | #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) | |
169 | extern char *ppc_canonicalize_symbol_name PARAMS ((char *)); | |
170 | ||
171 | /* Get the symbol class from the name. */ | |
172 | #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) | |
49309057 | 173 | extern void ppc_symbol_new_hook PARAMS ((symbolS *)); |
252b5132 RH |
174 | |
175 | /* Set the symbol class of a label based on the csect. */ | |
176 | #define tc_frob_label(sym) ppc_frob_label (sym) | |
49309057 | 177 | extern void ppc_frob_label PARAMS ((symbolS *)); |
252b5132 RH |
178 | |
179 | /* TOC relocs requires special handling. */ | |
180 | #define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp) | |
181 | extern int ppc_fix_adjustable PARAMS ((struct fix *)); | |
182 | ||
183 | /* A relocation from one csect to another must be kept. */ | |
184 | #define TC_FORCE_RELOCATION(FIXP) ppc_force_relocation (FIXP) | |
185 | extern int ppc_force_relocation PARAMS ((struct fix *)); | |
186 | ||
187 | /* We need to set the section VMA. */ | |
188 | #define tc_frob_section(sec) ppc_frob_section (sec) | |
189 | extern void ppc_frob_section PARAMS ((asection *)); | |
190 | ||
191 | /* Finish up the symbol. */ | |
192 | #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) | |
49309057 | 193 | extern int ppc_frob_symbol PARAMS ((symbolS *)); |
252b5132 RH |
194 | |
195 | /* Finish up the entire symtab. */ | |
196 | #define tc_adjust_symtab() ppc_adjust_symtab () | |
197 | extern void ppc_adjust_symtab PARAMS ((void)); | |
198 | ||
199 | /* Niclas Andersson <nican@ida.liu.se> says this is needed. */ | |
7f6d05e8 CP |
200 | extern int ppc_subseg_align PARAMS ((void)); |
201 | #define SUB_SEGMENT_ALIGN(SEG) ppc_subseg_align() | |
252b5132 | 202 | |
2c1c4c62 GK |
203 | /* We also need to copy, in particular, the class of the symbol, |
204 | over what obj-coff would otherwise have copied. */ | |
205 | #define OBJ_COPY_SYMBOL_ATTRIBUTES(dest,src) \ | |
206 | do { \ | |
207 | if (SF_GET_GET_SEGMENT (dest)) \ | |
208 | S_SET_SEGMENT (dest, S_GET_SEGMENT (src)); \ | |
209 | symbol_get_tc (dest)->size = symbol_get_tc (src)->size; \ | |
210 | symbol_get_tc (dest)->align = symbol_get_tc (src)->align; \ | |
211 | symbol_get_tc (dest)->class = symbol_get_tc (src)->class; \ | |
212 | symbol_get_tc (dest)->within = symbol_get_tc (src)->within; \ | |
213 | } while (0) | |
214 | ||
252b5132 RH |
215 | #endif /* OBJ_XCOFF */ |
216 | ||
217 | #ifdef OBJ_ELF | |
218 | ||
219 | /* Branch prediction relocations must force relocation, as must | |
220 | the vtable description relocs. */ | |
221 | #define TC_FORCE_RELOCATION(FIXP) \ | |
222 | ((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \ | |
223 | || (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \ | |
224 | || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \ | |
225 | || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \ | |
0baf16f2 AM |
226 | || (BFD_DEFAULT_TARGET_SIZE == 64 \ |
227 | && (FIXP)->fx_r_type == BFD_RELOC_PPC64_TOC) \ | |
252b5132 RH |
228 | || (FIXP)->fx_r_type == BFD_RELOC_VTABLE_INHERIT \ |
229 | || (FIXP)->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
230 | ||
231 | #define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \ | |
232 | (TC_FORCE_RELOCATION (FIXP) \ | |
49309057 ILT |
233 | || ((FIXP)->fx_addsy && !(FIXP)->fx_subsy \ |
234 | && S_GET_SEGMENT ((FIXP)->fx_addsy) != SEC)) | |
252b5132 RH |
235 | |
236 | /* Support for SHF_EXCLUDE and SHT_ORDERED */ | |
237 | extern int ppc_section_letter PARAMS ((int, char **)); | |
9de8d8f1 RH |
238 | extern int ppc_section_type PARAMS ((char *, size_t)); |
239 | extern int ppc_section_word PARAMS ((char *, size_t)); | |
252b5132 RH |
240 | extern int ppc_section_flags PARAMS ((int, int, int)); |
241 | ||
242 | #define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG) | |
9de8d8f1 RH |
243 | #define md_elf_section_type(STR, LEN) ppc_section_type (STR, LEN) |
244 | #define md_elf_section_word(STR, LEN) ppc_section_word (STR, LEN) | |
252b5132 RH |
245 | #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) |
246 | ||
0baf16f2 AM |
247 | #if BFD_DEFAULT_TARGET_SIZE == 64 |
248 | /* Extra sections for 64-bit ELF PPC. */ | |
249 | #define ELF_TC_SPECIAL_SECTIONS \ | |
250 | { ".toc", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE}, \ | |
251 | { ".tocbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE}, | |
252 | #else | |
252b5132 RH |
253 | /* Add extra PPC sections -- Note, for now, make .sbss2 and .PPC.EMB.sbss0 a |
254 | normal section, and not a bss section so that the linker doesn't crater | |
255 | when trying to make more than 2 sections. */ | |
256 | #define ELF_TC_SPECIAL_SECTIONS \ | |
257 | { ".tags", SHT_ORDERED, SHF_ALLOC }, \ | |
258 | { ".sdata", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE }, \ | |
259 | { ".sbss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE }, \ | |
260 | { ".sdata2", SHT_PROGBITS, SHF_ALLOC }, \ | |
261 | { ".sbss2", SHT_PROGBITS, SHF_ALLOC }, \ | |
262 | { ".PPC.EMB.sdata0", SHT_PROGBITS, SHF_ALLOC }, \ | |
263 | { ".PPC.EMB.sbss0", SHT_PROGBITS, SHF_ALLOC }, | |
0baf16f2 | 264 | #endif |
252b5132 RH |
265 | |
266 | #define tc_comment_chars ppc_comment_chars | |
267 | extern const char *ppc_comment_chars; | |
268 | ||
81d4177b | 269 | /* Keep relocations relative to the GOT, or non-PC relative. */ |
0baf16f2 AM |
270 | #define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp) |
271 | extern int ppc_fix_adjustable PARAMS ((struct fix *)); | |
252b5132 RH |
272 | |
273 | /* We must never ever try to resolve references to externally visible | |
274 | symbols in the assembler, because the .o file might go into a shared | |
275 | library, and some other shared library might override that symbol. */ | |
276 | #define TC_RELOC_RTSYM_LOC_FIXUP(FIX) \ | |
277 | ((FIX)->fx_addsy == NULL \ | |
278 | || (! S_IS_EXTERNAL ((FIX)->fx_addsy) \ | |
279 | && ! S_IS_WEAK ((FIX)->fx_addsy) \ | |
280 | && S_IS_DEFINED ((FIX)->fx_addsy) \ | |
281 | && ! S_IS_COMMON ((FIX)->fx_addsy))) | |
282 | ||
0baf16f2 AM |
283 | #if BFD_DEFAULT_TARGET_SIZE == 64 |
284 | /* Finish up the symbol. */ | |
285 | #define tc_frob_symbol(sym, punt) punt = ppc_elf_frob_symbol (sym) | |
286 | extern int ppc_elf_frob_symbol PARAMS ((symbolS *)); | |
287 | #endif | |
288 | ||
5d6f4f16 | 289 | #define DWARF2_LINE_MIN_INSN_LENGTH 4 |
252b5132 RH |
290 | #endif /* OBJ_ELF */ |
291 | ||
252b5132 RH |
292 | /* call md_pcrel_from_section, not md_pcrel_from */ |
293 | #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC) | |
294 | extern long md_pcrel_from_section PARAMS ((struct fix *, segT)); | |
295 | ||
a8a22e33 | 296 | #define md_parse_name(name, exp, c) ppc_parse_name (name, exp) |
252b5132 RH |
297 | extern int ppc_parse_name PARAMS ((const char *, struct expressionS *)); |
298 | ||
299 | #define md_operand(x) |