1/* as.h - global header file
2   Copyright (C) 1987-2020 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, but WITHOUT
12   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
14   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 GAS
22#define GAS 1
23/* I think this stuff is largely out of date.  xoxorich.
24
25   CAPITALISED names are #defined.
26   "lowercaseH" is #defined if "lowercase.h" has been #include-d.
27   "lowercaseT" is a typedef of "lowercase" objects.
28   "lowercaseP" is type "pointer to object of type 'lowercase'".
29   "lowercaseS" is typedef struct ... lowercaseS.
30
31   #define DEBUG to enable all the "know" assertion tests.
32   #define SUSPECT when debugging hash code.
33   #define COMMON as "extern" for all modules except one, where you #define
34  	COMMON as "".
35   If TEST is #defined, then we are testing a module: #define COMMON as "".  */
36
37#include "alloca-conf.h"
38
39/* Now, tend to the rest of the configuration.  */
40
41/* System include files first...  */
42#include <stdio.h>
43
44#ifdef STRING_WITH_STRINGS
45#include <string.h>
46#include <strings.h>
47#else
48#ifdef HAVE_STRING_H
49#include <string.h>
50#else
51#ifdef HAVE_STRINGS_H
52#include <strings.h>
53#endif
54#endif
55#endif
56
57#ifdef HAVE_STDLIB_H
58#include <stdlib.h>
59#endif
60#ifdef HAVE_UNISTD_H
61#include <unistd.h>
62#endif
63#ifdef HAVE_SYS_TYPES_H
64/* for size_t, pid_t */
65#include <sys/types.h>
66#endif
67
68#ifdef HAVE_ERRNO_H
69#include <errno.h>
70#endif
71
72#include <stdarg.h>
73
74#include "getopt.h"
75/* The first getopt value for machine-independent long options.
76   150 isn't special; it's just an arbitrary non-ASCII char value.  */
77#define OPTION_STD_BASE 150
78/* The first getopt value for machine-dependent long options.
79   290 gives the standard options room to grow.  */
80#define OPTION_MD_BASE  290
81
82#ifdef DEBUG
83#undef NDEBUG
84#endif
85#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 6)
86#define __PRETTY_FUNCTION__  ((char *) NULL)
87#endif
88#define gas_assert(P)	((void) ((P) ? 0 : (abort (), 0)))
89#undef abort
90#define abort()		as_abort (__FILE__, __LINE__, __PRETTY_FUNCTION__)
91
92/* Now GNU header files...  */
93#include "ansidecl.h"
94#include "bfd.h"
95#include "libiberty.h"
96
97/* Define the standard progress macros.  */
98#include "progress.h"
99
100/* Other stuff from config.h.  */
101#ifdef NEED_DECLARATION_ENVIRON
102extern char **environ;
103#endif
104#ifdef NEED_DECLARATION_ERRNO
105extern int errno;
106#endif
107#ifdef NEED_DECLARATION_FFS
108extern int ffs (int);
109#endif
110#ifdef NEED_DECLARATION_FREE
111extern void free ();
112#endif
113#ifdef NEED_DECLARATION_MALLOC
114extern void *malloc ();
115extern void *realloc ();
116#endif
117#ifdef NEED_DECLARATION_STRSTR
118extern char *strstr ();
119#endif
120
121#if !HAVE_DECL_MEMPCPY
122void *mempcpy(void *, const void *, size_t);
123#endif
124
125#if !HAVE_DECL_VSNPRINTF
126extern int vsnprintf(char *, size_t, const char *, va_list);
127#endif
128
129/* This is needed for VMS.  */
130#if ! defined (HAVE_UNLINK) && defined (HAVE_REMOVE)
131#define unlink remove
132#endif
133
134/* Hack to make "gcc -Wall" not complain about obstack macros.  */
135#if !defined (memcpy) && !defined (bcopy)
136#define bcopy(src,dest,size)	memcpy (dest, src, size)
137#endif
138
139#ifndef __LINE__
140#define __LINE__ "unknown"
141#endif /* __LINE__ */
142
143#ifndef __FILE__
144#define __FILE__ "unknown"
145#endif /* __FILE__ */
146
147#ifndef FOPEN_WB
148#ifdef USE_BINARY_FOPEN
149#include "fopen-bin.h"
150#else
151#include "fopen-same.h"
152#endif
153#endif
154
155#ifndef EXIT_SUCCESS
156#define EXIT_SUCCESS 0
157#define EXIT_FAILURE 1
158#endif
159
160#ifndef SEEK_SET
161#define SEEK_SET 0
162#endif
163
164#define obstack_chunk_alloc xmalloc
165#define obstack_chunk_free xfree
166
167#define xfree free
168
169#include "asintl.h"
170
171#define BAD_CASE(val)							    \
172  {									    \
173    as_fatal (_("Case value %ld unexpected at line %d of file \"%s\"\n"),   \
174	      (long) val, __LINE__, __FILE__);				    \
175  }
176
177#include "flonum.h"
178
179/* These are assembler-wide concepts */
180
181extern bfd *stdoutput;
182typedef bfd_vma addressT;
183typedef bfd_signed_vma offsetT;
184
185/* Type of symbol value, etc.  For use in prototypes.  */
186typedef addressT valueT;
187
188#ifndef COMMON
189#ifdef TEST
190#define COMMON			/* Declare our COMMONs storage here.  */
191#else
192#define COMMON extern		/* Our commons live elsewhere.  */
193#endif
194#endif
195/* COMMON now defined */
196
197#ifndef ENABLE_CHECKING
198#define ENABLE_CHECKING 0
199#endif
200
201#if ENABLE_CHECKING || defined (DEBUG)
202#ifndef know
203#define know(p) gas_assert(p)	/* Verify our assumptions!  */
204#endif /* not yet defined */
205#else
206#define know(p)	do {} while (0)	/* know() checks are no-op.ed  */
207#endif
208
209/* input_scrub.c */
210
211/* Supplies sanitised buffers to read.c.
212   Also understands printing line-number part of error messages.  */
213
214/* subsegs.c     Sub-segments. Also, segment(=expression type)s.*/
215
216typedef asection *segT;
217#define SEG_NORMAL(SEG)		(   (SEG) != absolute_section	\
218				 && (SEG) != undefined_section	\
219				 && (SEG) != reg_section	\
220				 && (SEG) != expr_section)
221typedef int subsegT;
222
223/* What subseg we are accessing now?  */
224COMMON subsegT now_subseg;
225
226/* Segment our instructions emit to.  */
227COMMON segT now_seg;
228
229#define segment_name(SEG)	bfd_section_name (SEG)
230
231extern segT reg_section, expr_section;
232/* Shouldn't these be eliminated someday?  */
233extern segT text_section, data_section, bss_section;
234#define absolute_section	bfd_abs_section_ptr
235#define undefined_section	bfd_und_section_ptr
236
237enum _relax_state
238{
239  /* Dummy frag used by listing code.  */
240  rs_dummy = 0,
241
242  /* Variable chars to be repeated fr_offset times.
243     Fr_symbol unused. Used with fr_offset == 0 for a
244     constant length frag.  */
245  rs_fill,
246
247  /* Align.  The fr_offset field holds the power of 2 to which to
248     align.  The fr_var field holds the number of characters in the
249     fill pattern.  The fr_subtype field holds the maximum number of
250     bytes to skip when aligning, or 0 if there is no maximum.  */
251  rs_align,
252
253  /* Align code.  The fr_offset field holds the power of 2 to which
254     to align.  This type is only generated by machine specific
255     code, which is normally responsible for handling the fill
256     pattern.  The fr_subtype field holds the maximum number of
257     bytes to skip when aligning, or 0 if there is no maximum.  */
258  rs_align_code,
259
260  /* Test for alignment.  Like rs_align, but used by several targets
261     to warn if data is not properly aligned.  */
262  rs_align_test,
263
264  /* Org: Fr_offset, fr_symbol: address. 1 variable char: fill
265     character.  */
266  rs_org,
267
268#ifndef WORKING_DOT_WORD
269  /* JF: gunpoint */
270  rs_broken_word,
271#endif
272
273  /* Machine specific relaxable (or similarly alterable) instruction.  */
274  rs_machine_dependent,
275
276  /* .space directive with expression operand that needs to be computed
277     later.  Similar to rs_org, but different.
278     fr_symbol: operand
279     1 variable char: fill character  */
280  rs_space,
281
282  /* .nop directive with expression operand that needs to be computed
283     later.  Similar to rs_space, but different.  It fills with no-op
284     instructions.
285     fr_symbol: operand
286     1 constant byte: no-op fill control byte.  */
287  rs_space_nop,
288
289  /* Similar to rs_fill.  It is used to implement .nop directive .  */
290  rs_fill_nop,
291
292  /* A DWARF leb128 value; only ELF uses this.  The subtype is 0 for
293     unsigned, 1 for signed.  */
294  rs_leb128,
295
296  /* Exception frame information which we may be able to optimize.  */
297  rs_cfa,
298
299  /* Cross-fragment dwarf2 line number optimization.  */
300  rs_dwarf2dbg
301};
302
303typedef enum _relax_state relax_stateT;
304
305/* This type is used in prototypes, so it can't be a type that will be
306   widened for argument passing.  */
307typedef unsigned int relax_substateT;
308
309/* Enough bits for address, but still an integer type.
310   Could be a problem, cross-assembling for 64-bit machines.  */
311typedef addressT relax_addressT;
312
313struct relax_type
314{
315  /* Forward reach. Signed number. > 0.  */
316  offsetT rlx_forward;
317  /* Backward reach. Signed number. < 0.  */
318  offsetT rlx_backward;
319
320  /* Bytes length of this address.  */
321  unsigned char rlx_length;
322
323  /* Next longer relax-state.  0 means there is no 'next' relax-state.  */
324  relax_substateT rlx_more;
325};
326
327typedef struct relax_type relax_typeS;
328
329/* main program "as.c" (command arguments etc).  */
330
331COMMON unsigned char flag_no_comments; /* -f */
332COMMON unsigned char flag_debug; /* -D */
333COMMON unsigned char flag_signed_overflow_ok; /* -J */
334#ifndef WORKING_DOT_WORD
335COMMON unsigned char flag_warn_displacement; /* -K */
336#endif
337
338/* True if local symbols should be retained.  */
339COMMON int flag_keep_locals; /* -L */
340
341/* True if we are assembling in MRI mode.  */
342COMMON int flag_mri;
343
344/* Should the data section be made read-only and appended to the text
345   section?  */
346COMMON unsigned char flag_readonly_data_in_text; /* -R */
347
348/* True if warnings should be inhibited.  */
349COMMON int flag_no_warnings; /* -W */
350
351/* True if warnings count as errors.  */
352COMMON int flag_fatal_warnings; /* --fatal-warnings */
353
354/* True if we should attempt to generate output even if non-fatal errors
355   are detected.  */
356COMMON unsigned char flag_always_generate_output; /* -Z */
357
358/* This is true if the assembler should output time and space usage.  */
359COMMON unsigned char flag_print_statistics;
360
361/* True if local absolute symbols are to be stripped.  */
362COMMON int flag_strip_local_absolute;
363
364/* True if we should generate a traditional format object file.  */
365COMMON int flag_traditional_format;
366
367/* Type of compressed debug sections we should generate.   */
368COMMON enum compressed_debug_section_type flag_compress_debug;
369
370/* TRUE if .note.GNU-stack section with SEC_CODE should be created */
371COMMON int flag_execstack;
372
373/* TRUE if .note.GNU-stack section with SEC_CODE should be created */
374COMMON int flag_noexecstack;
375
376/* name of emitted object file */
377COMMON const char *out_file_name;
378
379/* name of file defining extensions to the basic instruction set */
380COMMON char *insttbl_file_name;
381
382/* TRUE if we need a second pass.  */
383COMMON int need_pass_2;
384
385/* TRUE if we should do no relaxing, and
386   leave lots of padding.  */
387COMMON int linkrelax;
388
389COMMON int do_not_pad_sections_to_alignment;
390
391/* TRUE if we should produce a listing.  */
392extern int listing;
393
394/* Type of debugging information we should generate.  We currently support
395   stabs, ECOFF, and DWARF2.
396
397   NOTE!  This means debug information about the assembly source code itself
398   and _not_ about possible debug information from a high-level language.
399   This is especially relevant to DWARF2, since the compiler may emit line
400   number directives that the assembler resolves.  */
401
402enum debug_info_type
403{
404  DEBUG_UNSPECIFIED,
405  DEBUG_NONE,
406  DEBUG_STABS,
407  DEBUG_ECOFF,
408  DEBUG_DWARF,
409  DEBUG_DWARF2
410};
411
412extern enum debug_info_type debug_type;
413extern int use_gnu_debug_info_extensions;
414COMMON bfd_boolean flag_dwarf_sections;
415extern int flag_dwarf_cie_version;
416extern unsigned int dwarf_level;
417
418/* Maximum level of macro nesting.  */
419extern int max_macro_nest;
420
421/* Verbosity level.  */
422extern int verbose;
423
424/* Obstack chunk size.  Keep large for efficient space use, make small to
425   increase malloc calls for monitoring memory allocation.  */
426extern int chunksize;
427
428struct _pseudo_type
429{
430  /* assembler mnemonic, lower case, no '.' */
431  const char *poc_name;
432  /* Do the work */
433  void (*poc_handler) (int);
434  /* Value to pass to handler */
435  int poc_val;
436};
437
438typedef struct _pseudo_type pseudo_typeS;
439
440#if (__GNUC__ >= 2) && !defined(VMS)
441/* for use with -Wformat */
442
443#if __GNUC__ == 2 && __GNUC_MINOR__ < 6
444/* Support for double underscores in attribute names was added in gcc
445   2.6, so avoid them if we are using an earlier version.  */
446#define __printf__ printf
447#define __format__ format
448#endif
449
450#define PRINTF_LIKE(FCN) \
451  void FCN (const char *format, ...) \
452    __attribute__ ((__format__ (__printf__, 1, 2)))
453#define PRINTF_WHERE_LIKE(FCN) \
454  void FCN (const char *file, unsigned int line, const char *format, ...) \
455    __attribute__ ((__format__ (__printf__, 3, 4)))
456
457#else /* __GNUC__ < 2 || defined(VMS) */
458
459#define PRINTF_LIKE(FCN)	void FCN (const char *format, ...)
460#define PRINTF_WHERE_LIKE(FCN)	void FCN (const char *file, \
461					  unsigned int line, \
462					  const char *format, ...)
463
464#endif /* __GNUC__ < 2 || defined(VMS) */
465
466PRINTF_LIKE (as_bad);
467PRINTF_LIKE (as_fatal) ATTRIBUTE_NORETURN;
468PRINTF_LIKE (as_tsktsk);
469PRINTF_LIKE (as_warn);
470PRINTF_WHERE_LIKE (as_bad_where);
471PRINTF_WHERE_LIKE (as_warn_where);
472
473void   as_abort (const char *, int, const char *) ATTRIBUTE_NORETURN;
474void   signal_init (void);
475void   sprint_value (char *, addressT);
476int    had_errors (void);
477int    had_warnings (void);
478void   as_warn_value_out_of_range (const char *, offsetT, offsetT, offsetT,
479				   const char *, unsigned);
480void   as_bad_value_out_of_range (const char *, offsetT, offsetT, offsetT,
481				  const char *, unsigned);
482void   print_version_id (void);
483char * app_push (void);
484
485/* Number of littlenums required to hold an extended precision number.	*/
486#define MAX_LITTLENUMS 6
487
488char * atof_ieee (char *, int, LITTLENUM_TYPE *);
489char * atof_ieee_detail (char *, int, int, LITTLENUM_TYPE *, FLONUM_TYPE *);
490const char * ieee_md_atof (int, char *, int *, bfd_boolean);
491const char * vax_md_atof (int, char *, int *);
492char * input_scrub_include_file (const char *, char *);
493void   input_scrub_insert_line (const char *);
494void   input_scrub_insert_file (char *);
495char * input_scrub_new_file (const char *);
496char * input_scrub_next_buffer (char **bufp);
497size_t do_scrub_chars (size_t (*get) (char *, size_t), char *, size_t);
498int    gen_to_words (LITTLENUM_TYPE *, int, long);
499int    had_err (void);
500int    ignore_input (void);
501void   cond_finish_check (int);
502void   cond_exit_macro (int);
503int    seen_at_least_1_file (void);
504void   app_pop (char *);
505const char * as_where (unsigned int *);
506const char * as_where_physical (unsigned int *);
507void   bump_line_counters (void);
508void   do_scrub_begin (int);
509void   input_scrub_begin (void);
510void   input_scrub_close (void);
511void   input_scrub_end (void);
512int    new_logical_line (const char *, int);
513int    new_logical_line_flags (const char *, int, int);
514void   subsegs_begin (void);
515void   subseg_change (segT, int);
516segT   subseg_new (const char *, subsegT);
517segT   subseg_force_new (const char *, subsegT);
518void   subseg_set (segT, subsegT);
519int    subseg_text_p (segT);
520int    seg_not_empty_p (segT);
521void   start_dependencies (char *);
522void   register_dependency (const char *);
523void   print_dependencies (void);
524segT   subseg_get (const char *, int);
525
526const char *remap_debug_filename (const char *);
527void add_debug_prefix_map (const char *);
528
529static inline char *
530xmemdup0 (const char *in, size_t len)
531{
532  char *out = (char *) xmalloc (len + 1);
533  out[len] = 0;
534  return (char *) memcpy (out, in, len);
535}
536
537struct expressionS;
538struct fix;
539typedef struct symbol symbolS;
540typedef struct frag fragS;
541
542/* literal.c */
543valueT add_to_literal_pool (symbolS *, valueT, segT, int);
544
545int check_eh_frame (struct expressionS *, unsigned int *);
546int eh_frame_estimate_size_before_relax (fragS *);
547int eh_frame_relax_frag (fragS *);
548void eh_frame_convert_frag (fragS *);
549int generic_force_reloc (struct fix *);
550
551#include "expr.h"		/* Before targ-*.h */
552
553/* This one starts the chain of target dependent headers.  */
554#include "targ-env.h"
555
556#ifdef OBJ_MAYBE_ELF
557#define IS_ELF (OUTPUT_FLAVOR == bfd_target_elf_flavour)
558#else
559#ifdef OBJ_ELF
560#define IS_ELF 1
561#else
562#define IS_ELF 0
563#endif
564#endif
565
566#include "write.h"
567#include "frags.h"
568#include "hashtab.h"
569#include "hash.h"
570#include "read.h"
571#include "symbols.h"
572
573#include "tc.h"
574#include "obj.h"
575
576#ifdef USE_EMULATIONS
577#include "emul.h"
578#endif
579#include "listing.h"
580
581#ifdef H_TICK_HEX
582extern int enable_h_tick_hex;
583#endif
584
585#ifdef TC_M68K
586/* True if we are assembling in m68k MRI mode.  */
587COMMON int flag_m68k_mri;
588#define DOLLAR_AMBIGU flag_m68k_mri
589#else
590#define flag_m68k_mri 0
591#endif
592
593#ifndef TC_STRING_ESCAPES
594#define TC_STRING_ESCAPES 1
595#endif
596
597#ifdef WARN_COMMENTS
598COMMON int           warn_comment;
599COMMON unsigned int  found_comment;
600COMMON const char *        found_comment_file;
601#endif
602
603#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
604/* If .size directive failure should be error or warning.  */
605COMMON int flag_allow_nonconst_size;
606
607/* If we should generate ELF common symbols with the STT_COMMON type.  */
608extern int flag_use_elf_stt_common;
609
610/* TRUE iff GNU Build attribute notes should
611   be generated if none are in the input files.  */
612extern bfd_boolean flag_generate_build_notes;
613
614/* If section name substitution sequences should be honored */
615COMMON int flag_sectname_subst;
616#endif
617
618#ifndef DOLLAR_AMBIGU
619#define DOLLAR_AMBIGU 0
620#endif
621
622#ifndef NUMBERS_WITH_SUFFIX
623#define NUMBERS_WITH_SUFFIX 0
624#endif
625
626#ifndef LOCAL_LABELS_DOLLAR
627#define LOCAL_LABELS_DOLLAR 0
628#endif
629
630#ifndef LOCAL_LABELS_FB
631#define LOCAL_LABELS_FB 0
632#endif
633
634#ifndef LABELS_WITHOUT_COLONS
635#define LABELS_WITHOUT_COLONS 0
636#endif
637
638#ifndef NO_PSEUDO_DOT
639#define NO_PSEUDO_DOT 0
640#endif
641
642#ifndef TEXT_SECTION_NAME
643#define TEXT_SECTION_NAME	".text"
644#define DATA_SECTION_NAME	".data"
645#define BSS_SECTION_NAME	".bss"
646#endif
647
648#ifndef OCTETS_PER_BYTE_POWER
649#define OCTETS_PER_BYTE_POWER 0
650#endif
651#ifndef OCTETS_PER_BYTE
652#define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
653#endif
654#if OCTETS_PER_BYTE != (1<<OCTETS_PER_BYTE_POWER)
655 #error "Octets per byte conflicts with its power-of-two definition!"
656#endif
657
658#if defined OBJ_ELF || defined OBJ_MAYBE_ELF
659/* On ELF platforms, mark debug sections with SEC_ELF_OCTETS */
660#define SEC_OCTETS (IS_ELF ? SEC_ELF_OCTETS : 0)
661#else
662#define SEC_OCTETS 0
663#endif
664
665#endif /* GAS */
666