1 /* tc-i386.h -- Header file for tc-i386.c
2 Copyright (C) 1989-2023 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_CLOUDABI
63 #define ELF_TARGET_FORMAT64 "elf64-x86-64-cloudabi"
64 #endif
65
66 #ifdef TE_SOLARIS
67 #define ELF_TARGET_FORMAT "elf32-i386-sol2"
68 #define ELF_TARGET_FORMAT64 "elf64-x86-64-sol2"
69 #endif
70
71 #ifndef ELF_TARGET_FORMAT
72 #define ELF_TARGET_FORMAT "elf32-i386"
73 #endif
74
75 #ifndef ELF_TARGET_FORMAT64
76 #define ELF_TARGET_FORMAT64 "elf64-x86-64"
77 #endif
78
79 #ifndef ELF_TARGET_FORMAT32
80 #define ELF_TARGET_FORMAT32 "elf32-x86-64"
81 #endif
82
83 #ifndef ELF_TARGET_IAMCU_FORMAT
84 #define ELF_TARGET_IAMCU_FORMAT "elf32-iamcu"
85 #endif
86
87 #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
88 || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
89 || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
90 extern const char *i386_target_format (void);
91 #define TARGET_FORMAT i386_target_format ()
92 #else
93 #ifdef TE_GO32
94 #define TARGET_FORMAT "coff-go32"
95 #endif
96 #ifdef OBJ_AOUT
97 #define TARGET_FORMAT AOUT_TARGET_FORMAT
98 #endif
99 #endif
100
101 #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
102
103 /* '$' may be used as immediate prefix. */
104 #undef LOCAL_LABELS_DOLLAR
105 #define LOCAL_LABELS_DOLLAR 0
106 #undef LOCAL_LABELS_FB
107 #define LOCAL_LABELS_FB 1
108
109 extern const char extra_symbol_chars[];
110 #define tc_symbol_chars extra_symbol_chars
111
112 extern const char *i386_comment_chars;
113 #define tc_comment_chars i386_comment_chars
114
115 /* The name of the global offset table generated by the compiler. Allow
116 this to be overridden if need be. */
117 #ifndef GLOBAL_OFFSET_TABLE_NAME
118 #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
119 #endif
120
121 #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
122 extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
123
124 #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC) \
125 x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
126 extern void x86_cons_fix_new
127 (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
128
129 #define X_PRECISION 5
130 #define X_PRECISION_PAD 0
131
132 #define TC_ADDRESS_BYTES x86_address_bytes
133 extern int x86_address_bytes (void);
134
135 #define DIFF_EXPR_OK /* foo-. gets turned into PC relative relocs */
136
137 #define NO_RELOC BFD_RELOC_NONE
138
139 int i386_validate_fix (struct fix *);
140 #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) do { \
141 if (!i386_validate_fix(FIX)) goto SKIP; \
142 } while (0)
143
144 #define tc_fix_adjustable(X) tc_i386_fix_adjustable(X)
145 extern int tc_i386_fix_adjustable (struct fix *);
146
147 /* Values passed to md_apply_fix don't include the symbol value. */
148 #define MD_APPLY_SYM_VALUE(FIX) 0
149
150 /* ELF wants external syms kept, as does PE COFF. */
151 #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
152 #define EXTERN_FORCE_RELOC \
153 (OUTPUT_FLAVOR == bfd_target_elf_flavour \
154 || OUTPUT_FLAVOR == bfd_target_coff_flavour)
155 #else
156 #define EXTERN_FORCE_RELOC \
157 (OUTPUT_FLAVOR == bfd_target_elf_flavour)
158 #endif
159
160 /* This expression evaluates to true if the relocation is for a local
161 object for which we still want to do the relocation at runtime.
162 False if we are willing to perform this relocation while building
163 the .o file. GOTOFF and GOT32 do not need to be checked here because
164 they are not pcrel. .*/
165
166 #define TC_FORCE_RELOCATION_LOCAL(FIX) \
167 (GENERIC_FORCE_RELOCATION_LOCAL (FIX) \
168 || (FIX)->fx_r_type == BFD_RELOC_386_PLT32 \
169 || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC \
170 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \
171 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \
172 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
173
174 #define TC_FORCE_RELOCATION_ABS(FIX) \
175 (TC_FORCE_RELOCATION (FIX) \
176 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32 \
177 || (FIX)->fx_r_type == BFD_RELOC_386_GOT32X \
178 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL \
179 || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCRELX \
180 || (FIX)->fx_r_type == BFD_RELOC_X86_64_REX_GOTPCRELX)
181
182 extern int i386_parse_name (char *, expressionS *, char *);
183 #define md_parse_name(s, e, m, c) i386_parse_name (s, e, c)
184
185 extern operatorT i386_operator (const char *name, unsigned int operands, char *);
186 #define md_operator i386_operator
187
188 extern int i386_need_index_operator (void);
189 #define md_need_index_operator i386_need_index_operator
190
191 #ifdef BFD64
192 extern bool i386_record_operator
193 (operatorT, const expressionS *, const expressionS *);
194 #define md_optimize_expr(l, o, r) i386_record_operator (o, l, r)
195 #endif
196
197 #define md_register_arithmetic 0
198
199 extern const struct relax_type md_relax_table[];
200 #define TC_GENERIC_RELAX_TABLE md_relax_table
201
202 extern int optimize_align_code;
203
204 #define md_do_align(n, fill, len, max, around) \
205 if ((n) \
206 && !need_pass_2 \
207 && optimize_align_code \
208 && (!(fill) \
209 || ((char)*(fill) == (char)0x90 && (len) == 1)) \
210 && subseg_text_p (now_seg)) \
211 { \
212 frag_align_code ((n), (max)); \
213 goto around; \
214 }
215
216 #define MAX_MEM_FOR_RS_ALIGN_CODE \
217 (alignment ? ((size_t) 1 << alignment) - 1 : (size_t) 1)
218
219 extern void i386_cons_align (int);
220 #define md_cons_align(nbytes) i386_cons_align (nbytes)
221
222 void i386_print_statistics (FILE *);
223 #define tc_print_statistics i386_print_statistics
224
225 void i386_md_end (void);
226 #define md_end i386_md_end
227
228 extern unsigned int i386_frag_max_var (fragS *);
229 #define md_frag_max_var i386_frag_max_var
230
231 extern long i386_generic_table_relax_frag (segT, fragS *, long);
232 #define md_generic_table_relax_frag(segment, fragP, stretch) \
233 i386_generic_table_relax_frag (segment, fragP, stretch)
234
235 #define md_number_to_chars number_to_chars_littleendian
236
237 enum processor_type
238 {
239 PROCESSOR_UNKNOWN,
240 PROCESSOR_GENERIC32,
241 PROCESSOR_GENERIC64,
242 PROCESSOR_I386,
243 PROCESSOR_I486,
244 PROCESSOR_PENTIUM,
245 PROCESSOR_PENTIUMPRO,
246 PROCESSOR_PENTIUM4,
247 PROCESSOR_NOCONA,
248 PROCESSOR_CORE,
249 PROCESSOR_CORE2,
250 PROCESSOR_COREI7,
251 PROCESSOR_IAMCU,
252 PROCESSOR_K6,
253 PROCESSOR_ATHLON,
254 PROCESSOR_K8,
255 PROCESSOR_AMDFAM10,
256 PROCESSOR_BD,
257 PROCESSOR_ZNVER,
258 PROCESSOR_BT,
259 /* Keep this last. */
260 PROCESSOR_NONE
261 };
262
263 extern enum processor_type cpu_arch_tune;
264 extern enum processor_type cpu_arch_isa;
265 extern i386_cpu_flags cpu_arch_isa_flags;
266
267 struct i386_tc_frag_data
268 {
269 union
270 {
271 fragS *padding_fragP;
272 fragS *branch_fragP;
273 } u;
274 addressT padding_address;
275 enum processor_type isa;
276 i386_cpu_flags isa_flags;
277 enum processor_type tune;
278 unsigned int max_bytes;
279 unsigned char length;
280 unsigned char last_length;
281 unsigned char max_prefix_length;
282 unsigned char prefix_length;
283 unsigned char default_prefix;
284 unsigned char cmp_size;
285 unsigned int mf_type : 3;
286 unsigned int classified : 1;
287 unsigned int branch_type : 3;
288 unsigned int code64 : 1; /* Only set by output_branch for now. */
289 };
290
291 /* We need to emit the right NOP pattern in .align frags. This is
292 done after the text-to-bits assembly pass, so we need to mark it with
293 the isa/tune settings at the time the .align was assembled. */
294 #define TC_FRAG_TYPE struct i386_tc_frag_data
295
296 #define TC_FRAG_INIT(FRAGP, MAX_BYTES) \
297 do \
298 { \
299 (FRAGP)->tc_frag_data.u.padding_fragP = NULL; \
300 (FRAGP)->tc_frag_data.padding_address = 0; \
301 (FRAGP)->tc_frag_data.isa = cpu_arch_isa; \
302 (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags; \
303 (FRAGP)->tc_frag_data.tune = cpu_arch_tune; \
304 (FRAGP)->tc_frag_data.max_bytes = (MAX_BYTES); \
305 (FRAGP)->tc_frag_data.length = 0; \
306 (FRAGP)->tc_frag_data.last_length = 0; \
307 (FRAGP)->tc_frag_data.max_prefix_length = 0; \
308 (FRAGP)->tc_frag_data.prefix_length = 0; \
309 (FRAGP)->tc_frag_data.default_prefix = 0; \
310 (FRAGP)->tc_frag_data.cmp_size = 0; \
311 (FRAGP)->tc_frag_data.classified = 0; \
312 (FRAGP)->tc_frag_data.branch_type = 0; \
313 (FRAGP)->tc_frag_data.mf_type = 0; \
314 } \
315 while (0)
316
317 #define WORKING_DOT_WORD 1
318
319 /* How to generate NOPs for .nop direct directive. */
320 extern void i386_generate_nops (fragS *, char *, offsetT, int);
321 #define md_generate_nops(frag, where, amount, control) \
322 i386_generate_nops ((frag), (where), (amount), (control))
323
324 #define HANDLE_ALIGN(fragP) \
325 if (fragP->fr_type == rs_align_code) \
326 { \
327 offsetT __count = (fragP->fr_next->fr_address \
328 - fragP->fr_address \
329 - fragP->fr_fix); \
330 if (__count > 0 \
331 && (unsigned int) __count <= fragP->tc_frag_data.max_bytes) \
332 md_generate_nops (fragP, fragP->fr_literal + fragP->fr_fix, \
333 __count, 0); \
334 }
335
336 /* We want .cfi_* pseudo-ops for generating unwind info. */
337 #define TARGET_USE_CFIPOP 1
338
339 extern unsigned int x86_dwarf2_return_column;
340 #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
341
342 extern int x86_cie_data_alignment;
343 #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
344
345 extern int x86_dwarf2_addr_size (void);
346 #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
347
348 #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
349 extern void tc_x86_parse_to_dw2regnum (expressionS *);
350
351 #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
352 extern void tc_x86_frame_initial_instructions (void);
353
354 #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
355 extern int i386_elf_section_type (const char *, size_t);
356
357 #ifdef TE_SOLARIS
358 #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
359 extern void i386_solaris_fix_up_eh_frame (segT);
360 #endif
361
362 /* Support for SHF_X86_64_LARGE */
363 extern bfd_vma x86_64_section_word (char *, size_t);
364 extern bfd_vma x86_64_section_letter (int, const char **);
365 #define md_elf_section_letter(LETTER, PTR_MSG) x86_64_section_letter (LETTER, PTR_MSG)
366 #define md_elf_section_word(STR, LEN) x86_64_section_word (STR, LEN)
367
368 #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)
369 extern void x86_cleanup (void);
370 #define md_cleanup() x86_cleanup ()
371
372 /* Whether SFrame stack trace info is supported. */
373 extern bool x86_support_sframe_p (void);
374 #define support_sframe_p x86_support_sframe_p
375
376 /* The stack-pointer register number for SFrame stack trace info. */
377 extern unsigned int x86_sframe_cfa_sp_reg;
378 #define SFRAME_CFA_SP_REG x86_sframe_cfa_sp_reg
379
380 /* The frame-pointer register number for SFrame stack trace info. */
381 extern unsigned int x86_sframe_cfa_fp_reg;
382 #define SFRAME_CFA_FP_REG x86_sframe_cfa_fp_reg
383
384 /* Specify if RA tracking is needed. */
385 extern bool x86_sframe_ra_tracking_p (void);
386 #define sframe_ra_tracking_p x86_sframe_ra_tracking_p
387
388 /* Specify the fixed offset to recover RA from CFA.
389 (useful only when RA tracking is not needed). */
390 extern offsetT x86_sframe_cfa_ra_offset (void);
391 #define sframe_cfa_ra_offset x86_sframe_cfa_ra_offset
392
393 /* The abi/arch indentifier for SFrame. */
394 extern unsigned char x86_sframe_get_abi_arch (void);
395 #define sframe_get_abi_arch x86_sframe_get_abi_arch
396
397 #endif
398
399 #ifdef TE_PE
400
401 #define O_secrel O_md1
402
403 #define TC_DWARF2_EMIT_OFFSET tc_pe_dwarf2_emit_offset
404 void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
405
406 #endif /* TE_PE */
407
408 /* X_add_symbol:X_op_symbol (Intel mode only) */
409 #define O_full_ptr O_md2
410
411 #ifdef OBJ_MACH_O
412
413 #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
414
415 #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
416 (obj_mach_o_force_reloc_sub_same (FIX, SEG))
417
418 #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
419 (obj_mach_o_force_reloc_sub_local (FIX, SEG))
420
421 #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
422
423 #endif /* OBJ_MACH_O */
424
425 #endif /* TC_I386 */