1 /* Interface between the opcode library and its callers.
2 
3    Copyright (C) 1999-2016 Free Software Foundation, Inc.
4 
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 3, or (at your option)
8    any later version.
9 
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14 
15    You should have received a copy of the GNU General Public License
16    along with this program; if not, write to the Free Software
17    Foundation, Inc., 51 Franklin Street - Fifth Floor,
18    Boston, MA 02110-1301, USA.
19 
20    Written by Cygnus Support, 1993.
21 
22    The opcode library (libopcodes.a) provides instruction decoders for
23    a large variety of instruction sets, callable with an identical
24    interface, for making instruction-processing programs more independent
25    of the instruction set being processed.  */
26 
27 #ifndef DIS_ASM_H
28 #define DIS_ASM_H
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif
33 
34 #include <stdio.h>
35 #include "bfd.h"
36 
37   typedef int (*fprintf_ftype) (void *, const char*, ...) ATTRIBUTE_FPTR_PRINTF_2;
38 
39 enum dis_insn_type
40 {
41   dis_noninsn,			/* Not a valid instruction.  */
42   dis_nonbranch,		/* Not a branch instruction.  */
43   dis_branch,			/* Unconditional branch.  */
44   dis_condbranch,		/* Conditional branch.  */
45   dis_jsr,			/* Jump to subroutine.  */
46   dis_condjsr,			/* Conditional jump to subroutine.  */
47   dis_dref,			/* Data reference instruction.  */
48   dis_dref2			/* Two data references in instruction.  */
49 };
50 
51 /* This struct is passed into the instruction decoding routine,
52    and is passed back out into each callback.  The various fields are used
53    for conveying information from your main routine into your callbacks,
54    for passing information into the instruction decoders (such as the
55    addresses of the callback functions), or for passing information
56    back from the instruction decoders to their callers.
57 
58    It must be initialized before it is first passed; this can be done
59    by hand, or using one of the initialization macros below.  */
60 
61 typedef struct disassemble_info
62 {
63   fprintf_ftype fprintf_func;
64   void *stream;
65   void *application_data;
66 
67   /* Target description.  We could replace this with a pointer to the bfd,
68      but that would require one.  There currently isn't any such requirement
69      so to avoid introducing one we record these explicitly.  */
70   /* The bfd_flavour.  This can be bfd_target_unknown_flavour.  */
71   enum bfd_flavour flavour;
72   /* The bfd_arch value.  */
73   enum bfd_architecture arch;
74   /* The bfd_mach value.  */
75   unsigned long mach;
76   /* Endianness (for bi-endian cpus).  Mono-endian cpus can ignore this.  */
77   enum bfd_endian endian;
78   /* Endianness of code, for mixed-endian situations such as ARM BE8.  */
79   enum bfd_endian endian_code;
80   /* An arch/mach-specific bitmask of selected instruction subsets, mainly
81      for processors with run-time-switchable instruction sets.  The default,
82      zero, means that there is no constraint.  CGEN-based opcodes ports
83      may use ISA_foo masks.  */
84   void *insn_sets;
85 
86   /* Some targets need information about the current section to accurately
87      display insns.  If this is NULL, the target disassembler function
88      will have to make its best guess.  */
89   asection *section;
90 
91   /* An array of pointers to symbols either at the location being disassembled
92      or at the start of the function being disassembled.  The array is sorted
93      so that the first symbol is intended to be the one used.  The others are
94      present for any misc. purposes.  This is not set reliably, but if it is
95      not NULL, it is correct.  */
96   asymbol **symbols;
97   /* Number of symbols in array.  */
98   int num_symbols;
99 
100   /* Symbol table provided for targets that want to look at it.  This is
101      used on Arm to find mapping symbols and determine Arm/Thumb code.  */
102   asymbol **symtab;
103   int symtab_pos;
104   int symtab_size;
105 
106   /* For use by the disassembler.
107      The top 16 bits are reserved for public use (and are documented here).
108      The bottom 16 bits are for the internal use of the disassembler.  */
109   unsigned long flags;
110   /* Set if the disassembler has determined that there are one or more
111      relocations associated with the instruction being disassembled.  */
112 #define INSN_HAS_RELOC	 (1 << 31)
113   /* Set if the user has requested the disassembly of data as well as code.  */
114 #define DISASSEMBLE_DATA (1 << 30)
115   /* Set if the user has specifically set the machine type encoded in the
116      mach field of this structure.  */
117 #define USER_SPECIFIED_MACHINE_TYPE (1 << 29)
118 
119   /* Use internally by the target specific disassembly code.  */
120   void *private_data;
121 
122   /* Function used to get bytes to disassemble.  MEMADDR is the
123      address of the stuff to be disassembled, MYADDR is the address to
124      put the bytes in, and LENGTH is the number of bytes to read.
125      INFO is a pointer to this struct.
126      Returns an errno value or 0 for success.  */
127   int (*read_memory_func)
128     (bfd_vma memaddr, bfd_byte *myaddr, unsigned int length,
129      struct disassemble_info *dinfo);
130 
131   /* Function which should be called if we get an error that we can't
132      recover from.  STATUS is the errno value from read_memory_func and
133      MEMADDR is the address that we were trying to read.  INFO is a
134      pointer to this struct.  */
135   void (*memory_error_func)
136     (int status, bfd_vma memaddr, struct disassemble_info *dinfo);
137 
138   /* Function called to print ADDR.  */
139   void (*print_address_func)
140     (bfd_vma addr, struct disassemble_info *dinfo);
141 
142   /* Function called to determine if there is a symbol at the given ADDR.
143      If there is, the function returns 1, otherwise it returns 0.
144      This is used by ports which support an overlay manager where
145      the overlay number is held in the top part of an address.  In
146      some circumstances we want to include the overlay number in the
147      address, (normally because there is a symbol associated with
148      that address), but sometimes we want to mask out the overlay bits.  */
149   int (* symbol_at_address_func)
150     (bfd_vma addr, struct disassemble_info *dinfo);
151 
152   /* Function called to check if a SYMBOL is can be displayed to the user.
153      This is used by some ports that want to hide special symbols when
154      displaying debugging outout.  */
155   bfd_boolean (* symbol_is_valid)
156     (asymbol *, struct disassemble_info *dinfo);
157 
158   /* These are for buffer_read_memory.  */
159   bfd_byte *buffer;
160   bfd_vma buffer_vma;
161   unsigned int buffer_length;
162 
163   /* This variable may be set by the instruction decoder.  It suggests
164       the number of bytes objdump should display on a single line.  If
165       the instruction decoder sets this, it should always set it to
166       the same value in order to get reasonable looking output.  */
167   int bytes_per_line;
168 
169   /* The next two variables control the way objdump displays the raw data.  */
170   /* For example, if bytes_per_line is 8 and bytes_per_chunk is 4, the */
171   /* output will look like this:
172      00:   00000000 00000000
173      with the chunks displayed according to "display_endian". */
174   int bytes_per_chunk;
175   enum bfd_endian display_endian;
176 
177   /* Number of octets per incremented target address
178      Normally one, but some DSPs have byte sizes of 16 or 32 bits.  */
179   unsigned int octets_per_byte;
180 
181   /* The number of zeroes we want to see at the end of a section before we
182      start skipping them.  */
183   unsigned int skip_zeroes;
184 
185   /* The number of zeroes to skip at the end of a section.  If the number
186      of zeroes at the end is between SKIP_ZEROES_AT_END and SKIP_ZEROES,
187      they will be disassembled.  If there are fewer than
188      SKIP_ZEROES_AT_END, they will be skipped.  This is a heuristic
189      attempt to avoid disassembling zeroes inserted by section
190      alignment.  */
191   unsigned int skip_zeroes_at_end;
192 
193   /* Whether the disassembler always needs the relocations.  */
194   bfd_boolean disassembler_needs_relocs;
195 
196   /* Results from instruction decoders.  Not all decoders yet support
197      this information.  This info is set each time an instruction is
198      decoded, and is only valid for the last such instruction.
199 
200      To determine whether this decoder supports this information, set
201      insn_info_valid to 0, decode an instruction, then check it.  */
202 
203   char insn_info_valid;		/* Branch info has been set. */
204   char branch_delay_insns;	/* How many sequential insn's will run before
205 				   a branch takes effect.  (0 = normal) */
206   char data_size;		/* Size of data reference in insn, in bytes */
207   enum dis_insn_type insn_type;	/* Type of instruction */
208   bfd_vma target;		/* Target address of branch or dref, if known;
209 				   zero if unknown.  */
210   bfd_vma target2;		/* Second target address for dref2 */
211 
212   /* Command line options specific to the target disassembler.  */
213   char * disassembler_options;
214 
215   /* If non-zero then try not disassemble beyond this address, even if
216      there are values left in the buffer.  This address is the address
217      of the nearest symbol forwards from the start of the disassembly,
218      and it is assumed that it lies on the boundary between instructions.
219      If an instruction spans this address then this is an error in the
220      file being disassembled.  */
221   bfd_vma stop_vma;
222 
223 } disassemble_info;
224 
225 
226 /* Standard disassemblers.  Disassemble one instruction at the given
227    target address.  Return number of octets processed.  */
228 typedef int (*disassembler_ftype) (bfd_vma, disassemble_info *);
229 
230 extern int print_insn_aarch64		(bfd_vma, disassemble_info *);
231 extern int print_insn_alpha		(bfd_vma, disassemble_info *);
232 extern int print_insn_avr		(bfd_vma, disassemble_info *);
233 extern int print_insn_bfin		(bfd_vma, disassemble_info *);
234 extern int print_insn_big_arm		(bfd_vma, disassemble_info *);
235 extern int print_insn_big_mips		(bfd_vma, disassemble_info *);
236 extern int print_insn_big_nios2		(bfd_vma, disassemble_info *);
237 extern int print_insn_big_powerpc	(bfd_vma, disassemble_info *);
238 extern int print_insn_big_score         (bfd_vma, disassemble_info *);
239 extern int print_insn_cr16              (bfd_vma, disassemble_info *);
240 extern int print_insn_crx               (bfd_vma, disassemble_info *);
241 extern int print_insn_d10v		(bfd_vma, disassemble_info *);
242 extern int print_insn_d30v		(bfd_vma, disassemble_info *);
243 extern int print_insn_dlx 		(bfd_vma, disassemble_info *);
244 extern int print_insn_epiphany		(bfd_vma, disassemble_info *);
245 extern int print_insn_fr30		(bfd_vma, disassemble_info *);
246 extern int print_insn_frv		(bfd_vma, disassemble_info *);
247 extern int print_insn_ft32  		(bfd_vma, disassemble_info *);
248 extern int print_insn_h8300		(bfd_vma, disassemble_info *);
249 extern int print_insn_h8300h		(bfd_vma, disassemble_info *);
250 extern int print_insn_h8300s		(bfd_vma, disassemble_info *);
251 extern int print_insn_h8500		(bfd_vma, disassemble_info *);
252 extern int print_insn_hppa		(bfd_vma, disassemble_info *);
253 extern int print_insn_i370		(bfd_vma, disassemble_info *);
254 extern int print_insn_i386		(bfd_vma, disassemble_info *);
255 extern int print_insn_i386_att		(bfd_vma, disassemble_info *);
256 extern int print_insn_i386_intel	(bfd_vma, disassemble_info *);
257 extern int print_insn_i860		(bfd_vma, disassemble_info *);
258 extern int print_insn_i960		(bfd_vma, disassemble_info *);
259 extern int print_insn_ia64		(bfd_vma, disassemble_info *);
260 extern int print_insn_ip2k		(bfd_vma, disassemble_info *);
261 extern int print_insn_iq2000		(bfd_vma, disassemble_info *);
262 extern int print_insn_little_arm	(bfd_vma, disassemble_info *);
263 extern int print_insn_little_mips	(bfd_vma, disassemble_info *);
264 extern int print_insn_little_nios2	(bfd_vma, disassemble_info *);
265 extern int print_insn_little_powerpc	(bfd_vma, disassemble_info *);
266 extern int print_insn_little_score      (bfd_vma, disassemble_info *);
267 extern int print_insn_lm32		(bfd_vma, disassemble_info *);
268 extern int print_insn_m32c	        (bfd_vma, disassemble_info *);
269 extern int print_insn_m32r		(bfd_vma, disassemble_info *);
270 extern int print_insn_m68hc11		(bfd_vma, disassemble_info *);
271 extern int print_insn_m68hc12		(bfd_vma, disassemble_info *);
272 extern int print_insn_m9s12x		(bfd_vma, disassemble_info *);
273 extern int print_insn_m9s12xg		(bfd_vma, disassemble_info *);
274 extern int print_insn_m68k		(bfd_vma, disassemble_info *);
275 extern int print_insn_m88k		(bfd_vma, disassemble_info *);
276 extern int print_insn_mcore		(bfd_vma, disassemble_info *);
277 extern int print_insn_mep		(bfd_vma, disassemble_info *);
278 extern int print_insn_metag		(bfd_vma, disassemble_info *);
279 extern int print_insn_microblaze	(bfd_vma, disassemble_info *);
280 extern int print_insn_mmix		(bfd_vma, disassemble_info *);
281 extern int print_insn_mn10200		(bfd_vma, disassemble_info *);
282 extern int print_insn_mn10300		(bfd_vma, disassemble_info *);
283 extern int print_insn_moxie		(bfd_vma, disassemble_info *);
284 extern int print_insn_msp430		(bfd_vma, disassemble_info *);
285 extern int print_insn_mt                (bfd_vma, disassemble_info *);
286 extern int print_insn_nds32		(bfd_vma, disassemble_info *);
287 extern int print_insn_ns32k		(bfd_vma, disassemble_info *);
288 extern int print_insn_or1k		(bfd_vma, disassemble_info *);
289 extern int print_insn_pdp11		(bfd_vma, disassemble_info *);
290 extern int print_insn_pj		(bfd_vma, disassemble_info *);
291 extern int print_insn_rs6000		(bfd_vma, disassemble_info *);
292 extern int print_insn_s390		(bfd_vma, disassemble_info *);
293 extern int print_insn_sh		(bfd_vma, disassemble_info *);
294 extern int print_insn_sh64		(bfd_vma, disassemble_info *);
295 extern int print_insn_sh64x_media	(bfd_vma, disassemble_info *);
296 extern int print_insn_sparc		(bfd_vma, disassemble_info *);
297 extern int print_insn_spu		(bfd_vma, disassemble_info *);
298 extern int print_insn_tic30		(bfd_vma, disassemble_info *);
299 extern int print_insn_tic4x		(bfd_vma, disassemble_info *);
300 extern int print_insn_tic54x		(bfd_vma, disassemble_info *);
301 extern int print_insn_tic6x		(bfd_vma, disassemble_info *);
302 extern int print_insn_tic80		(bfd_vma, disassemble_info *);
303 extern int print_insn_tilegx		(bfd_vma, disassemble_info *);
304 extern int print_insn_tilepro		(bfd_vma, disassemble_info *);
305 extern int print_insn_v850		(bfd_vma, disassemble_info *);
306 extern int print_insn_vax		(bfd_vma, disassemble_info *);
307 extern int print_insn_visium		(bfd_vma, disassemble_info *);
308 extern int print_insn_w65		(bfd_vma, disassemble_info *);
309 extern int print_insn_xc16x		(bfd_vma, disassemble_info *);
310 extern int print_insn_xgate             (bfd_vma, disassemble_info *);
311 extern int print_insn_xstormy16		(bfd_vma, disassemble_info *);
312 extern int print_insn_xtensa		(bfd_vma, disassemble_info *);
313 extern int print_insn_z80		(bfd_vma, disassemble_info *);
314 extern int print_insn_z8001		(bfd_vma, disassemble_info *);
315 extern int print_insn_z8002		(bfd_vma, disassemble_info *);
316 extern int print_insn_rx		(bfd_vma, disassemble_info *);
317 extern int print_insn_rl78		(bfd_vma, disassemble_info *);
318 extern int print_insn_rl78_g10		(bfd_vma, disassemble_info *);
319 extern int print_insn_rl78_g13		(bfd_vma, disassemble_info *);
320 extern int print_insn_rl78_g14		(bfd_vma, disassemble_info *);
321 
322 extern disassembler_ftype arc_get_disassembler (bfd *);
323 extern disassembler_ftype cris_get_disassembler (bfd *);
324 extern disassembler_ftype rl78_get_disassembler (bfd *);
325 
326 extern void print_aarch64_disassembler_options (FILE *);
327 extern void print_i386_disassembler_options (FILE *);
328 extern void print_mips_disassembler_options (FILE *);
329 extern void print_ppc_disassembler_options (FILE *);
330 extern void print_arm_disassembler_options (FILE *);
331 extern void parse_arm_disassembler_option (char *);
332 extern void print_s390_disassembler_options (FILE *);
333 extern int  get_arm_regname_num_options (void);
334 extern int  set_arm_regname_option (int);
335 extern int  get_arm_regnames (int, const char **, const char **, const char *const **);
336 extern bfd_boolean aarch64_symbol_is_valid (asymbol *, struct disassemble_info *);
337 extern bfd_boolean arm_symbol_is_valid (asymbol *, struct disassemble_info *);
338 extern void disassemble_init_powerpc (struct disassemble_info *);
339 
340 /* Fetch the disassembler for a given BFD, if that support is available.  */
341 extern disassembler_ftype disassembler (bfd *);
342 
343 /* Amend the disassemble_info structure as necessary for the target architecture.
344    Should only be called after initialising the info->arch field.  */
345 extern void disassemble_init_for_target (struct disassemble_info * dinfo);
346 
347 /* Document any target specific options available from the disassembler.  */
348 extern void disassembler_usage (FILE *);
349 
350 
351 /* This block of definitions is for particular callers who read instructions
352    into a buffer before calling the instruction decoder.  */
353 
354 /* Here is a function which callers may wish to use for read_memory_func.
355    It gets bytes from a buffer.  */
356 extern int buffer_read_memory
357   (bfd_vma, bfd_byte *, unsigned int, struct disassemble_info *);
358 
359 /* This function goes with buffer_read_memory.
360    It prints a message using info->fprintf_func and info->stream.  */
361 extern void perror_memory (int, bfd_vma, struct disassemble_info *);
362 
363 
364 /* Just print the address in hex.  This is included for completeness even
365    though both GDB and objdump provide their own (to print symbolic
366    addresses).  */
367 extern void generic_print_address
368   (bfd_vma, struct disassemble_info *);
369 
370 /* Always true.  */
371 extern int generic_symbol_at_address
372   (bfd_vma, struct disassemble_info *);
373 
374 /* Also always true.  */
375 extern bfd_boolean generic_symbol_is_valid
376   (asymbol *, struct disassemble_info *);
377 
378 /* Method to initialize a disassemble_info struct.  This should be
379    called by all applications creating such a struct.  */
380 extern void init_disassemble_info (struct disassemble_info *dinfo, void *stream,
381 				   fprintf_ftype fprintf_func);
382 
383 /* For compatibility with existing code.  */
384 #define INIT_DISASSEMBLE_INFO(INFO, STREAM, FPRINTF_FUNC) \
385   init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
386 #define INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC) \
387   init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
388 
389 
390 #ifdef __cplusplus
391 }
392 #endif
393 
394 #endif /* ! defined (DIS_ASM_H) */
395