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1  /* tc-i386.h -- Header file for tc-i386.c
2     Copyright (C) 1989-2014 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  #if ((defined (OBJ_MAYBE_COFF) && defined (OBJ_MAYBE_AOUT)) \
94       || defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) \
95       || defined (TE_PE) || defined (TE_PEP) || defined (OBJ_MACH_O))
96  extern const char *i386_target_format (void);
97  #define TARGET_FORMAT i386_target_format ()
98  #else
99  #ifdef TE_GO32
100  #define TARGET_FORMAT		"coff-go32"
101  #endif
102  #ifdef OBJ_AOUT
103  #define TARGET_FORMAT		AOUT_TARGET_FORMAT
104  #endif
105  #endif
106  
107  #if (defined (OBJ_MAYBE_ELF) || defined (OBJ_ELF))
108  #define md_end i386_elf_emit_arch_note
109  extern void i386_elf_emit_arch_note (void);
110  #endif
111  
112  #define SUB_SEGMENT_ALIGN(SEG, FRCHAIN) 0
113  
114  /* '$' may be used as immediate prefix.  */
115  #undef LOCAL_LABELS_DOLLAR
116  #define LOCAL_LABELS_DOLLAR 0
117  #undef LOCAL_LABELS_FB
118  #define LOCAL_LABELS_FB 1
119  
120  extern const char extra_symbol_chars[];
121  #define tc_symbol_chars extra_symbol_chars
122  
123  extern const char *i386_comment_chars;
124  #define tc_comment_chars i386_comment_chars
125  
126  /* The name of the global offset table generated by the compiler. Allow
127     this to be overridden if need be.  */
128  #ifndef GLOBAL_OFFSET_TABLE_NAME
129  #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
130  #endif
131  
132  #if (defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF)) && !defined (LEX_AT)
133  #define TC_PARSE_CONS_EXPRESSION(EXP, NBYTES) x86_cons (EXP, NBYTES)
134  #endif
135  extern bfd_reloc_code_real_type x86_cons (expressionS *, int);
136  
137  #define TC_CONS_FIX_NEW(FRAG, OFF, LEN, EXP, RELOC)	\
138    x86_cons_fix_new(FRAG, OFF, LEN, EXP, RELOC)
139  extern void x86_cons_fix_new
140  (fragS *, unsigned int, unsigned int, expressionS *, bfd_reloc_code_real_type);
141  
142  #define TC_ADDRESS_BYTES x86_address_bytes
143  extern int x86_address_bytes (void);
144  
145  #define DIFF_EXPR_OK    /* foo-. gets turned into PC relative relocs */
146  
147  #define NO_RELOC BFD_RELOC_NONE
148  
149  void i386_validate_fix (struct fix *);
150  #define TC_VALIDATE_FIX(FIX,SEGTYPE,SKIP) i386_validate_fix(FIX)
151  
152  #define tc_fix_adjustable(X)  tc_i386_fix_adjustable(X)
153  extern int tc_i386_fix_adjustable (struct fix *);
154  
155  /* Values passed to md_apply_fix don't include the symbol value.  */
156  #define MD_APPLY_SYM_VALUE(FIX) 0
157  
158  /* ELF wants external syms kept, as does PE COFF.  */
159  #if defined (TE_PE) && defined (STRICT_PE_FORMAT)
160  #define EXTERN_FORCE_RELOC				\
161    (OUTPUT_FLAVOR == bfd_target_elf_flavour		\
162     || OUTPUT_FLAVOR == bfd_target_coff_flavour)
163  #else
164  #define EXTERN_FORCE_RELOC				\
165    (OUTPUT_FLAVOR == bfd_target_elf_flavour)
166  #endif
167  
168  /* This expression evaluates to true if the relocation is for a local
169     object for which we still want to do the relocation at runtime.
170     False if we are willing to perform this relocation while building
171     the .o file.  GOTOFF and GOT32 do not need to be checked here because
172     they are not pcrel.  .*/
173  
174  #define TC_FORCE_RELOCATION_LOCAL(FIX)			\
175    (!(FIX)->fx_pcrel					\
176     || (FIX)->fx_r_type == BFD_RELOC_386_PLT32		\
177     || (FIX)->fx_r_type == BFD_RELOC_386_GOTPC		\
178     || (FIX)->fx_r_type == BFD_RELOC_X86_64_GOTPCREL	\
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_K6,
242    PROCESSOR_ATHLON,
243    PROCESSOR_K8,
244    PROCESSOR_GENERIC32,
245    PROCESSOR_GENERIC64,
246    PROCESSOR_AMDFAM10,
247    PROCESSOR_BD,
248    PROCESSOR_BT
249  };
250  
251  extern enum processor_type cpu_arch_tune;
252  extern enum processor_type cpu_arch_isa;
253  extern i386_cpu_flags cpu_arch_isa_flags;
254  
255  struct i386_tc_frag_data
256  {
257    enum processor_type isa;
258    i386_cpu_flags isa_flags;
259    enum processor_type tune;
260  };
261  
262  /* We need to emit the right NOP pattern in .align frags.  This is
263     done after the text-to-bits assembly pass, so we need to mark it with
264     the isa/tune settings at the time the .align was assembled.  */
265  #define TC_FRAG_TYPE struct i386_tc_frag_data
266  
267  #define TC_FRAG_INIT(FRAGP)					\
268   do								\
269     {								\
270       (FRAGP)->tc_frag_data.isa = cpu_arch_isa;			\
271       (FRAGP)->tc_frag_data.isa_flags = cpu_arch_isa_flags;	\
272       (FRAGP)->tc_frag_data.tune = cpu_arch_tune;		\
273     }								\
274   while (0)
275  
276  #ifdef SCO_ELF
277  #define tc_init_after_args() sco_id ()
278  extern void sco_id (void);
279  #endif
280  
281  #define WORKING_DOT_WORD 1
282  
283  /* We want .cfi_* pseudo-ops for generating unwind info.  */
284  #define TARGET_USE_CFIPOP 1
285  
286  extern unsigned int x86_dwarf2_return_column;
287  #define DWARF2_DEFAULT_RETURN_COLUMN x86_dwarf2_return_column
288  
289  extern int x86_cie_data_alignment;
290  #define DWARF2_CIE_DATA_ALIGNMENT x86_cie_data_alignment
291  
292  extern int x86_dwarf2_addr_size (void);
293  #define DWARF2_ADDR_SIZE(bfd) x86_dwarf2_addr_size ()
294  
295  #define tc_parse_to_dw2regnum tc_x86_parse_to_dw2regnum
296  extern void tc_x86_parse_to_dw2regnum (expressionS *);
297  
298  #define tc_cfi_frame_initial_instructions tc_x86_frame_initial_instructions
299  extern void tc_x86_frame_initial_instructions (void);
300  
301  #define md_elf_section_type(str,len) i386_elf_section_type (str, len)
302  extern int i386_elf_section_type (const char *, size_t);
303  
304  #ifdef TE_SOLARIS
305  #define md_fix_up_eh_frame(sec) i386_solaris_fix_up_eh_frame (sec)
306  extern void i386_solaris_fix_up_eh_frame (segT);
307  #endif
308  
309  /* Support for SHF_X86_64_LARGE */
310  extern bfd_vma x86_64_section_word (char *, size_t);
311  extern bfd_vma x86_64_section_letter (int, char **);
312  #define md_elf_section_letter(LETTER, PTR_MSG)	x86_64_section_letter (LETTER, PTR_MSG)
313  #define md_elf_section_word(STR, LEN)		x86_64_section_word (STR, LEN)
314  
315  #ifdef TE_PE
316  
317  #define O_secrel O_md1
318  
319  #define TC_DWARF2_EMIT_OFFSET  tc_pe_dwarf2_emit_offset
320  void tc_pe_dwarf2_emit_offset (symbolS *, unsigned int);
321  
322  #endif /* TE_PE */
323  
324  /* X_add_symbol:X_op_symbol (Intel mode only) */
325  #define O_full_ptr O_md2
326  
327  #ifdef OBJ_MACH_O
328  
329  #define TC_FORCE_RELOCATION(FIX) (obj_mach_o_force_reloc (FIX))
330  
331  #define TC_FORCE_RELOCATION_SUB_SAME(FIX,SEG) \
332  	  (obj_mach_o_force_reloc_sub_same (FIX, SEG))
333  
334  #define TC_FORCE_RELOCATION_SUB_LOCAL(FIX,SEG) \
335  	(obj_mach_o_force_reloc_sub_local (FIX, SEG))
336  
337  #define TC_VALIDATE_FIX_SUB(FIX, SEG) 1
338  
339  #endif /* OBJ_MACH_O */
340  
341  #endif /* TC_I386 */
342