1 /* tc-i386.h -- Header file for tc-i386.c
2    Copyright (C) 1989-2016 Free Software Foundation, Inc.
3 
4    This file is part of GAS, the GNU Assembler.
5 
6    GAS is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3, or (at your option)
9    any later version.
10 
11    GAS is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15 
16    You should have received a copy of the GNU General Public License
17    along with GAS; see the file COPYING.  If not, write to the Free
18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19    02110-1301, USA.  */
20 
21 #ifndef TC_I386
22 #define TC_I386 1
23 
24 #include "opcodes/i386-opc.h"
25 
26 struct fix;
27 
28 #define TARGET_BYTES_BIG_ENDIAN	0
29 
30 #define TARGET_ARCH		(i386_arch ())
31 #define TARGET_MACH		(i386_mach ())
32 extern enum bfd_architecture i386_arch (void);
33 extern unsigned long i386_mach (void);
34 
35 #ifdef TE_FreeBSD
36 #define AOUT_TARGET_FORMAT	"a.out-i386-freebsd"
37 #endif
38 #ifdef TE_NetBSD
39 #define AOUT_TARGET_FORMAT	"a.out-i386-netbsd"
40 #endif
41 #ifdef TE_386BSD
42 #define AOUT_TARGET_FORMAT	"a.out-i386-bsd"
43 #endif
44 #ifdef TE_LINUX
45 #define AOUT_TARGET_FORMAT	"a.out-i386-linux"
46 #endif
47 #ifdef TE_Mach
48 #define AOUT_TARGET_FORMAT	"a.out-mach3"
49 #endif
50 #ifdef TE_DYNIX
51 #define AOUT_TARGET_FORMAT	"a.out-i386-dynix"
52 #endif
53 #ifndef AOUT_TARGET_FORMAT
54 #define AOUT_TARGET_FORMAT	"a.out-i386"
55 #endif
56 
57 #ifdef TE_FreeBSD
58 #define ELF_TARGET_FORMAT	"elf32-i386-freebsd"
59 #define ELF_TARGET_FORMAT64	"elf64-x86-64-freebsd"
60 #elif defined (TE_VXWORKS)
61 #define ELF_TARGET_FORMAT	"elf32-i386-vxworks"
62 #elif defined (TE_NACL)
63 #define ELF_TARGET_FORMAT	"elf32-i386-nacl"
64 #define ELF_TARGET_FORMAT32	"elf32-x86-64-nacl"
65 #define ELF_TARGET_FORMAT64	"elf64-x86-64-nacl"
66 #endif
67 
68 #ifdef TE_SOLARIS
69 #define ELF_TARGET_FORMAT	"elf32-i386-sol2"
70 #define ELF_TARGET_FORMAT64	"elf64-x86-64-sol2"
71 #endif
72 
73 #ifndef ELF_TARGET_FORMAT
74 #define ELF_TARGET_FORMAT	"elf32-i386"
75 #endif
76 
77 #ifndef ELF_TARGET_FORMAT64
78 #define ELF_TARGET_FORMAT64	"elf64-x86-64"
79 #endif
80 
81 #ifndef ELF_TARGET_FORMAT32
82 #define ELF_TARGET_FORMAT32	"elf32-x86-64"
83 #endif
84 
85 #ifndef ELF_TARGET_L1OM_FORMAT
86 #define ELF_TARGET_L1OM_FORMAT	"elf64-l1om"
87 #endif
88 
89 #ifndef ELF_TARGET_K1OM_FORMAT
90 #define ELF_TARGET_K1OM_FORMAT	"elf64-k1om"
91 #endif
92 
93 #ifndef ELF_TARGET_IAMCU_FORMAT
94 #define ELF_TARGET_IAMCU_FORMAT	"elf32-iamcu"
95 #endif
96 
97 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
98      || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
99      || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
100 extern const char *i386_target_format (void);
101 #define TARGET_FORMAT i386_target_format ()
102 #else
103 #ifdef TE_GO32
104 #define TARGET_FORMAT		"coff-go32"
105 #endif
106 #ifdef OBJ_AOUT
107 #define TARGET_FORMAT		AOUT_TARGET_FORMAT
108 #endif
109 #endif
110 
111 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
112 
113 /* '$' may be used as immediate prefix.  */
114 #undef LOCAL_LABELS_DOLLAR
115 #define LOCAL_LABELS_DOLLAR 0
116 #undef LOCAL_LABELS_FB
117 #define LOCAL_LABELS_FB 1
118 
119 extern const char extra_symbol_chars[];
120 #define tc_symbol_chars extra_symbol_chars
121 
122 extern const char *i386_comment_chars;
123 #define tc_comment_chars i386_comment_chars
124 
125 /* The name of the global offset table generated by the compiler. Allow
126    this to be overridden if need be.  */
127 #ifndef GLOBAL_OFFSET_TABLE_NAME
128 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
129 #endif
130 
131 #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
132 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
133 #endif
134 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
135 
136 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)	\
137   x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
138 extern void x86_cons_fix_new
139 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
140 
141 #define TC_ADDRESS_BYTES x86_address_bytes
142 extern int x86_address_bytes (void);
143 
144 #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
145 
146 #define NO_RELOC BFD_RELOC_NONE
147 
148 void i386_validate_fix (struct fix *);
149 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
150 
151 #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
152 extern int tc_i386_fix_adjustable (struct fix *);
153 
154 /* Values passed to md_apply_fix don't include the symbol value.  */
155 #define MD_APPLY_SYM_VALUE(FIX) 0
156 
157 /* ELF wants external syms kept, as does PE COFF.  */
158 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
159 #define EXTERN_FORCE_RELOC				\
160   (OUTPUT_FLAVOR == bfd_target_elf_flavour		\
161    || OUTPUT_FLAVOR == bfd_target_coff_flavour)
162 #else
163 #define EXTERN_FORCE_RELOC				\
164   (OUTPUT_FLAVOR == bfd_target_elf_flavour)
165 #endif
166 
167 /* This expression evaluates to true if the relocation is for a local
168    object for which we still want to do the relocation at runtime.
169    False if we are willing to perform this relocation while building
170    the .o file.  GOTOFF and GOT32 do not need to be checked here because
171    they are not pcrel.  .*/
172 
173 #define TC_FORCE_RELOCATION_LOCAL(FIX)				\
174   (!(FIX)->fx_pcrel						\
175    || (FIX)->fx_r_type == BFD_RELOC_386_PLT32			\
176    || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC			\
177    || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX		\
178    || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX	\
179    || TC_FORCE_RELOCATION (FIX))
180 
181 extern int i386_parse_name (char *, expressionS *, char *);
182 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
183 
184 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
185 #define md_operator i386_operator
186 
187 extern int i386_need_index_operator (void);
188 #define md_need_index_operator i386_need_index_operator
189 
190 #define md_register_arithmetic 0
191 
192 extern const struct relax_type md_relax_table[];
193 #define TC_GENERIC_RELAX_TABLE md_relax_table
194 
195 extern int optimize_align_code;
196 
197 #define md_do_align(n, fill, len, max, around)				\
198 if ((n)									\
199     && !need_pass_2							\
200     && optimize_align_code						\
201     && (!(fill)								\
202 	|| ((char)*(fill) == (char)0x90 && (len) == 1))			\
203     && subseg_text_p (now_seg))						\
204   {									\
205     frag_align_code ((n), (max));					\
206     goto around;							\
207   }
208 
209 #define MAX_MEM_FOR_RS_ALIGN_CODE  31
210 
211 extern void i386_align_code (fragS *, int);
212 
213 #define HANDLE_ALIGN(fragP)						\
214 if (fragP->fr_type == rs_align_code) 					\
215   i386_align_code (fragP, (fragP->fr_next->fr_address			\
216 			   - fragP->fr_address				\
217 			   - fragP->fr_fix));
218 
219 void i386_print_statistics (FILE *);
220 #define tc_print_statistics i386_print_statistics
221 
222 extern unsigned int i386_frag_max_var (fragS *);
223 #define md_frag_max_var i386_frag_max_var
224 
225 #define md_number_to_chars number_to_chars_littleendian
226 
227 enum processor_type
228 {
229   PROCESSOR_UNKNOWN,
230   PROCESSOR_I386,
231   PROCESSOR_I486,
232   PROCESSOR_PENTIUM,
233   PROCESSOR_PENTIUMPRO,
234   PROCESSOR_PENTIUM4,
235   PROCESSOR_NOCONA,
236   PROCESSOR_CORE,
237   PROCESSOR_CORE2,
238   PROCESSOR_COREI7,
239   PROCESSOR_L1OM,
240   PROCESSOR_K1OM,
241   PROCESSOR_IAMCU,
242   PROCESSOR_K6,
243   PROCESSOR_ATHLON,
244   PROCESSOR_K8,
245   PROCESSOR_GENERIC32,
246   PROCESSOR_GENERIC64,
247   PROCESSOR_AMDFAM10,
248   PROCESSOR_BD,
249   PROCESSOR_ZNVER,
250   PROCESSOR_BT
251 };
252 
253 extern enum processor_type cpu_arch_tune;
254 extern enum processor_type cpu_arch_isa;
255 extern i386_cpu_flags cpu_arch_isa_flags;
256 
257 struct i386_tc_frag_data
258 {
259   enum processor_type isa;
260   i386_cpu_flags isa_flags;
261   enum processor_type tune;
262 };
263 
264 /* We need to emit the right NOP pattern in .align frags.  This is
265    done after the text-to-bits assembly pass, so we need to mark it with
266    the isa/tune settings at the time the .align was assembled.  */
267 #define TC_FRAG_TYPE struct i386_tc_frag_data
268 
269 #define TC_FRAG_INIT(FRAGP)					\
270  do								\
271    {								\
272      (FRAGP)->tc_frag_data.isa = cpu_arch_isa;			\
273      (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;	\
274      (FRAGP)->tc_frag_data.tune = cpu_arch_tune;		\
275    }								\
276  while (0)
277 
278 #ifdef SCO_ELF
279 #define tc_init_after_args() sco_id ()
280 extern void sco_id (void);
281 #endif
282 
283 #define WORKING_DOT_WORD 1
284 
285 /* We want .cfi_* pseudo-ops for generating unwind info.  */
286 #define TARGET_USE_CFIPOP 1
287 
288 extern unsigned int x86_dwarf2_return_column;
289 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
290 
291 extern int x86_cie_data_alignment;
292 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
293 
294 extern int x86_dwarf2_addr_size (void);
295 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
296 
297 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
298 extern void tc_x86_parse_to_dw2regnum (expressionS *);
299 
300 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
301 extern void tc_x86_frame_initial_instructions (void);
302 
303 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
304 extern int i386_elf_section_type (const char *, size_t);
305 
306 #ifdef TE_SOLARIS
307 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
308 extern void i386_solaris_fix_up_eh_frame (segT);
309 #endif
310 
311 /* Support for SHF_X86_64_LARGE */
312 extern bfd_vma x86_64_section_word (char *, size_t);
313 extern bfd_vma x86_64_section_letter (int, const char **);
314 #define md_elf_section_letter(LETTER, PTR_MSG)	x86_64_section_letter (LETTER, PTR_MSG)
315 #define md_elf_section_word(STR, LEN)		x86_64_section_word (STR, LEN)
316 
317 #ifdef TE_PE
318 
319 #define O_secrel O_md1
320 
321 #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
322 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
323 
324 #endif /* TE_PE */
325 
326 /* X_add_symbol:X_op_symbol (Intel mode only) */
327 #define O_full_ptr O_md2
328 
329 #ifdef OBJ_MACH_O
330 
331 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
332 
333 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
334 	  (obj_mach_o_force_reloc_sub_same (FIX, SEG))
335 
336 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
337 	(obj_mach_o_force_reloc_sub_local (FIX, SEG))
338 
339 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
340 
341 #endif /* OBJ_MACH_O */
342 
343 #endif /* TC_I386 */
344