Commit | Line | Data |
---|---|---|
60bcf0fa | 1 | /* tc-m68hc11.c -- Assembler code for the Motorola 68HC11 & 68HC12. |
5a38dc70 | 2 | Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc. |
7bfda7eb | 3 | Written by Stephane Carrez (stcarrez@nerim.fr) |
60bcf0fa NC |
4 | |
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include <stdio.h> | |
60bcf0fa | 23 | #include "as.h" |
3882b010 | 24 | #include "safe-ctype.h" |
60bcf0fa NC |
25 | #include "subsegs.h" |
26 | #include "opcode/m68hc11.h" | |
27 | #include "dwarf2dbg.h" | |
7bfda7eb | 28 | #include "elf/m68hc11.h" |
60bcf0fa | 29 | |
60bcf0fa NC |
30 | const char comment_chars[] = ";!"; |
31 | const char line_comment_chars[] = "#*"; | |
32 | const char line_separator_chars[] = ""; | |
33 | ||
34 | const char EXP_CHARS[] = "eE"; | |
35 | const char FLT_CHARS[] = "dD"; | |
36 | ||
37 | #define STATE_CONDITIONAL_BRANCH (1) | |
38 | #define STATE_PC_RELATIVE (2) | |
39 | #define STATE_INDEXED_OFFSET (3) | |
75538612 SC |
40 | #define STATE_INDEXED_PCREL (4) |
41 | #define STATE_XBCC_BRANCH (5) | |
42 | #define STATE_CONDITIONAL_BRANCH_6812 (6) | |
60bcf0fa NC |
43 | |
44 | #define STATE_BYTE (0) | |
45 | #define STATE_BITS5 (0) | |
46 | #define STATE_WORD (1) | |
47 | #define STATE_BITS9 (1) | |
48 | #define STATE_LONG (2) | |
49 | #define STATE_BITS16 (2) | |
50 | #define STATE_UNDF (3) /* Symbol undefined in pass1 */ | |
51 | ||
52 | /* This macro has no side-effects. */ | |
53 | #define ENCODE_RELAX(what,length) (((what) << 2) + (length)) | |
606ab118 AM |
54 | #define RELAX_STATE(s) ((s) >> 2) |
55 | #define RELAX_LENGTH(s) ((s) & 3) | |
60bcf0fa NC |
56 | |
57 | #define IS_OPCODE(C1,C2) (((C1) & 0x0FF) == ((C2) & 0x0FF)) | |
58 | ||
59 | /* This table describes how you change sizes for the various types of variable | |
60 | size expressions. This version only supports two kinds. */ | |
61 | ||
62 | /* The fields are: | |
fafb6d17 NC |
63 | How far Forward this mode will reach. |
64 | How far Backward this mode will reach. | |
65 | How many bytes this mode will add to the size of the frag. | |
66 | Which mode to go to if the offset won't fit in this one. */ | |
67 | ||
098f2ec3 | 68 | relax_typeS md_relax_table[] = { |
fafb6d17 NC |
69 | {1, 1, 0, 0}, /* First entries aren't used. */ |
70 | {1, 1, 0, 0}, /* For no good reason except. */ | |
71 | {1, 1, 0, 0}, /* that the VAX doesn't either. */ | |
60bcf0fa NC |
72 | {1, 1, 0, 0}, |
73 | ||
74 | /* Relax for bcc <L>. | |
75 | These insns are translated into b!cc +3 jmp L. */ | |
76 | {(127), (-128), 0, ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_WORD)}, | |
77 | {0, 0, 3, 0}, | |
78 | {1, 1, 0, 0}, | |
79 | {1, 1, 0, 0}, | |
80 | ||
81 | /* Relax for bsr <L> and bra <L>. | |
82 | These insns are translated into jsr and jmp. */ | |
83 | {(127), (-128), 0, ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD)}, | |
84 | {0, 0, 1, 0}, | |
85 | {1, 1, 0, 0}, | |
86 | {1, 1, 0, 0}, | |
87 | ||
88 | /* Relax for indexed offset: 5-bits, 9-bits, 16-bits. */ | |
89 | {(15), (-16), 0, ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS9)}, | |
90 | {(255), (-256), 1, ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS16)}, | |
88051039 | 91 | {0, 0, 2, 0}, |
60bcf0fa NC |
92 | {1, 1, 0, 0}, |
93 | ||
75538612 SC |
94 | /* Relax for PC relative offset: 5-bits, 9-bits, 16-bits. |
95 | For the 9-bit case, there will be a -1 correction to take into | |
96 | account the new byte that's why the range is -255..256. */ | |
97 | {(15), (-16), 0, ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS9)}, | |
98 | {(256), (-255), 1, ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS16)}, | |
99 | {0, 0, 2, 0}, | |
100 | {1, 1, 0, 0}, | |
101 | ||
60bcf0fa NC |
102 | /* Relax for dbeq/ibeq/tbeq r,<L>: |
103 | These insns are translated into db!cc +3 jmp L. */ | |
104 | {(255), (-256), 0, ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_WORD)}, | |
105 | {0, 0, 3, 0}, | |
106 | {1, 1, 0, 0}, | |
107 | {1, 1, 0, 0}, | |
108 | ||
109 | /* Relax for bcc <L> on 68HC12. | |
110 | These insns are translated into lbcc <L>. */ | |
111 | {(127), (-128), 0, ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_WORD)}, | |
112 | {0, 0, 2, 0}, | |
113 | {1, 1, 0, 0}, | |
114 | {1, 1, 0, 0}, | |
115 | ||
116 | }; | |
117 | ||
118 | /* 68HC11 and 68HC12 registers. They are numbered according to the 68HC12. */ | |
098f2ec3 | 119 | typedef enum register_id { |
60bcf0fa NC |
120 | REG_NONE = -1, |
121 | REG_A = 0, | |
122 | REG_B = 1, | |
123 | REG_CCR = 2, | |
124 | REG_D = 4, | |
125 | REG_X = 5, | |
126 | REG_Y = 6, | |
127 | REG_SP = 7, | |
128 | REG_PC = 8 | |
129 | } register_id; | |
130 | ||
098f2ec3 | 131 | typedef struct operand { |
60bcf0fa NC |
132 | expressionS exp; |
133 | register_id reg1; | |
134 | register_id reg2; | |
135 | int mode; | |
136 | } operand; | |
137 | ||
098f2ec3 | 138 | struct m68hc11_opcode_def { |
60bcf0fa NC |
139 | long format; |
140 | int min_operands; | |
141 | int max_operands; | |
142 | int nb_modes; | |
143 | int used; | |
144 | struct m68hc11_opcode *opcode; | |
145 | }; | |
146 | ||
147 | static struct m68hc11_opcode_def *m68hc11_opcode_defs = 0; | |
148 | static int m68hc11_nb_opcode_defs = 0; | |
149 | ||
098f2ec3 | 150 | typedef struct alias { |
60bcf0fa NC |
151 | const char *name; |
152 | const char *alias; | |
098f2ec3 | 153 | } alias; |
60bcf0fa | 154 | |
098f2ec3 | 155 | static alias alias_opcodes[] = { |
60bcf0fa NC |
156 | {"cpd", "cmpd"}, |
157 | {"cpx", "cmpx"}, | |
158 | {"cpy", "cmpy"}, | |
159 | {0, 0} | |
160 | }; | |
161 | ||
fafb6d17 NC |
162 | /* Local functions. */ |
163 | static register_id reg_name_search PARAMS ((char *)); | |
164 | static register_id register_name PARAMS ((void)); | |
27302d63 SC |
165 | static int cmp_opcode PARAMS ((struct m68hc11_opcode *, |
166 | struct m68hc11_opcode *)); | |
167 | static char *print_opcode_format PARAMS ((struct m68hc11_opcode *, int)); | |
168 | static char *skip_whites PARAMS ((char *)); | |
fafb6d17 | 169 | static int check_range PARAMS ((long, int)); |
60bcf0fa | 170 | static void print_opcode_list PARAMS ((void)); |
60bcf0fa | 171 | static void get_default_target PARAMS ((void)); |
fafb6d17 NC |
172 | static void print_insn_format PARAMS ((char *)); |
173 | static int get_operand PARAMS ((operand *, int, long)); | |
174 | static void fixup8 PARAMS ((expressionS *, int, int)); | |
175 | static void fixup16 PARAMS ((expressionS *, int, int)); | |
7bfda7eb | 176 | static void fixup24 PARAMS ((expressionS *, int, int)); |
27302d63 SC |
177 | static unsigned char convert_branch PARAMS ((unsigned char)); |
178 | static char *m68hc11_new_insn PARAMS ((int)); | |
179 | static void build_dbranch_insn PARAMS ((struct m68hc11_opcode *, | |
180 | operand *, int, int)); | |
181 | static int build_indexed_byte PARAMS ((operand *, int, int)); | |
182 | static int build_reg_mode PARAMS ((operand *, int)); | |
183 | ||
184 | static struct m68hc11_opcode *find | |
185 | PARAMS ((struct m68hc11_opcode_def *, operand *, int)); | |
60bcf0fa | 186 | static struct m68hc11_opcode *find_opcode |
fafb6d17 | 187 | PARAMS ((struct m68hc11_opcode_def *, operand *, int *)); |
60bcf0fa | 188 | static void build_jump_insn |
fafb6d17 NC |
189 | PARAMS ((struct m68hc11_opcode *, operand *, int, int)); |
190 | static void build_insn | |
191 | PARAMS ((struct m68hc11_opcode *, operand *, int)); | |
27302d63 | 192 | static int relaxable_symbol PARAMS ((symbolS *)); |
60bcf0fa | 193 | |
e371935f SC |
194 | /* Pseudo op to indicate a relax group. */ |
195 | static void s_m68hc11_relax PARAMS((int)); | |
196 | ||
eb086b59 SC |
197 | /* Pseudo op to control the ELF flags. */ |
198 | static void s_m68hc11_mode PARAMS ((int)); | |
199 | ||
200 | /* Mark the symbols with STO_M68HC12_FAR to indicate the functions | |
201 | are using 'rtc' for returning. It is necessary to use 'call' | |
202 | to invoke them. This is also used by the debugger to correctly | |
203 | find the stack frame. */ | |
204 | static void s_m68hc11_mark_symbol PARAMS ((int)); | |
205 | ||
60bcf0fa NC |
206 | /* Controls whether relative branches can be turned into long branches. |
207 | When the relative offset is too large, the insn are changed: | |
208 | bra -> jmp | |
209 | bsr -> jsr | |
210 | bcc -> b!cc +3 | |
211 | jmp L | |
212 | dbcc -> db!cc +3 | |
213 | jmp L | |
fafb6d17 | 214 | |
60bcf0fa NC |
215 | Setting the flag forbidds this. */ |
216 | static short flag_fixed_branchs = 0; | |
217 | ||
218 | /* Force to use long jumps (absolute) instead of relative branches. */ | |
219 | static short flag_force_long_jumps = 0; | |
220 | ||
221 | /* Change the direct addressing mode into an absolute addressing mode | |
222 | when the insn does not support direct addressing. | |
223 | For example, "clr *ZD0" is normally not possible and is changed | |
224 | into "clr ZDO". */ | |
225 | static short flag_strict_direct_addressing = 1; | |
226 | ||
227 | /* When an opcode has invalid operand, print out the syntax of the opcode | |
228 | to stderr. */ | |
229 | static short flag_print_insn_syntax = 0; | |
230 | ||
231 | /* Dumps the list of instructions with syntax and then exit: | |
232 | 1 -> Only dumps the list (sorted by name) | |
233 | 2 -> Generate an example (or test) that can be compiled. */ | |
234 | static short flag_print_opcodes = 0; | |
235 | ||
236 | /* Opcode hash table. */ | |
237 | static struct hash_control *m68hc11_hash; | |
238 | ||
239 | /* Current cpu (either cpu6811 or cpu6812). This is determined automagically | |
240 | by 'get_default_target' by looking at default BFD vector. This is overriden | |
241 | with the -m<cpu> option. */ | |
242 | static int current_architecture = 0; | |
243 | ||
244 | /* Default cpu determined by 'get_default_target'. */ | |
245 | static const char *default_cpu; | |
246 | ||
247 | /* Number of opcodes in the sorted table (filtered by current cpu). */ | |
248 | static int num_opcodes; | |
249 | ||
250 | /* The opcodes sorted by name and filtered by current cpu. */ | |
251 | static struct m68hc11_opcode *m68hc11_sorted_opcodes; | |
252 | ||
eb086b59 | 253 | /* ELF flags to set in the output file header. */ |
2f904664 | 254 | static int elf_flags = E_M68HC11_F64; |
eb086b59 | 255 | |
60bcf0fa NC |
256 | /* These are the machine dependent pseudo-ops. These are included so |
257 | the assembler can work on the output from the SUN C compiler, which | |
258 | generates these. */ | |
259 | ||
260 | /* This table describes all the machine specific pseudo-ops the assembler | |
261 | has to support. The fields are: | |
262 | pseudo-op name without dot | |
263 | function to call to execute this pseudo-op | |
264 | Integer arg to pass to the function. */ | |
098f2ec3 | 265 | const pseudo_typeS md_pseudo_table[] = { |
60bcf0fa NC |
266 | /* The following pseudo-ops are supported for MRI compatibility. */ |
267 | {"fcb", cons, 1}, | |
268 | {"fdb", cons, 2}, | |
269 | {"fcc", stringer, 1}, | |
270 | {"rmb", s_space, 0}, | |
986c6f4b SC |
271 | |
272 | /* Dwarf2 support for Gcc. */ | |
9f1838ed | 273 | {"file", (void (*) PARAMS ((int))) dwarf2_directive_file, 0}, |
60bcf0fa NC |
274 | {"loc", dwarf2_directive_loc, 0}, |
275 | ||
e629c13f SC |
276 | /* Motorola ALIS. */ |
277 | {"xrefb", s_ignore, 0}, /* Same as xref */ | |
278 | ||
e371935f SC |
279 | /* Gcc driven relaxation. */ |
280 | {"relax", s_m68hc11_relax, 0}, | |
281 | ||
eb086b59 SC |
282 | /* .mode instruction (ala SH). */ |
283 | {"mode", s_m68hc11_mode, 0}, | |
284 | ||
285 | /* .far instruction. */ | |
286 | {"far", s_m68hc11_mark_symbol, STO_M68HC12_FAR}, | |
287 | ||
288 | /* .interrupt instruction. */ | |
289 | {"interrupt", s_m68hc11_mark_symbol, STO_M68HC12_INTERRUPT}, | |
290 | ||
60bcf0fa NC |
291 | {0, 0, 0} |
292 | }; | |
60bcf0fa NC |
293 | \f |
294 | /* Options and initialization. */ | |
295 | ||
5a38dc70 | 296 | const char *md_shortopts = "Sm:"; |
60bcf0fa | 297 | |
098f2ec3 | 298 | struct option md_longopts[] = { |
60bcf0fa NC |
299 | #define OPTION_FORCE_LONG_BRANCH (OPTION_MD_BASE) |
300 | {"force-long-branchs", no_argument, NULL, OPTION_FORCE_LONG_BRANCH}, | |
301 | ||
302 | #define OPTION_SHORT_BRANCHS (OPTION_MD_BASE + 1) | |
303 | {"short-branchs", no_argument, NULL, OPTION_SHORT_BRANCHS}, | |
304 | ||
305 | #define OPTION_STRICT_DIRECT_MODE (OPTION_MD_BASE + 2) | |
306 | {"strict-direct-mode", no_argument, NULL, OPTION_STRICT_DIRECT_MODE}, | |
307 | ||
308 | #define OPTION_PRINT_INSN_SYNTAX (OPTION_MD_BASE + 3) | |
309 | {"print-insn-syntax", no_argument, NULL, OPTION_PRINT_INSN_SYNTAX}, | |
310 | ||
311 | #define OPTION_PRINT_OPCODES (OPTION_MD_BASE + 4) | |
312 | {"print-opcodes", no_argument, NULL, OPTION_PRINT_OPCODES}, | |
313 | ||
314 | #define OPTION_GENERATE_EXAMPLE (OPTION_MD_BASE + 5) | |
315 | {"generate-example", no_argument, NULL, OPTION_GENERATE_EXAMPLE}, | |
316 | ||
2f904664 SC |
317 | #define OPTION_MSHORT (OPTION_MD_BASE + 6) |
318 | {"mshort", no_argument, NULL, OPTION_MSHORT}, | |
319 | ||
320 | #define OPTION_MLONG (OPTION_MD_BASE + 7) | |
321 | {"mlong", no_argument, NULL, OPTION_MLONG}, | |
322 | ||
323 | #define OPTION_MSHORT_DOUBLE (OPTION_MD_BASE + 8) | |
324 | {"mshort-double", no_argument, NULL, OPTION_MSHORT_DOUBLE}, | |
325 | ||
326 | #define OPTION_MLONG_DOUBLE (OPTION_MD_BASE + 9) | |
327 | {"mlong-double", no_argument, NULL, OPTION_MLONG_DOUBLE}, | |
328 | ||
60bcf0fa NC |
329 | {NULL, no_argument, NULL, 0} |
330 | }; | |
331 | size_t md_longopts_size = sizeof (md_longopts); | |
332 | ||
333 | /* Get the target cpu for the assembler. This is based on the configure | |
334 | options and on the -m68hc11/-m68hc12 option. If no option is specified, | |
335 | we must get the default. */ | |
336 | const char * | |
337 | m68hc11_arch_format () | |
338 | { | |
339 | get_default_target (); | |
340 | if (current_architecture & cpu6811) | |
341 | return "elf32-m68hc11"; | |
342 | else | |
343 | return "elf32-m68hc12"; | |
344 | } | |
345 | ||
346 | enum bfd_architecture | |
347 | m68hc11_arch () | |
348 | { | |
349 | get_default_target (); | |
350 | if (current_architecture & cpu6811) | |
351 | return bfd_arch_m68hc11; | |
352 | else | |
353 | return bfd_arch_m68hc12; | |
354 | } | |
355 | ||
356 | int | |
357 | m68hc11_mach () | |
358 | { | |
359 | return 0; | |
360 | } | |
361 | ||
986c6f4b SC |
362 | /* Listing header selected according to cpu. */ |
363 | const char * | |
364 | m68hc11_listing_header () | |
365 | { | |
366 | if (current_architecture & cpu6811) | |
367 | return "M68HC11 GAS "; | |
368 | else | |
369 | return "M68HC12 GAS "; | |
370 | } | |
371 | ||
60bcf0fa NC |
372 | void |
373 | md_show_usage (stream) | |
374 | FILE *stream; | |
375 | { | |
376 | get_default_target (); | |
377 | fprintf (stream, _("\ | |
378 | Motorola 68HC11/68HC12 options:\n\ | |
379 | -m68hc11 | -m68hc12 specify the processor [default %s]\n\ | |
2f904664 SC |
380 | -mshort use 16-bit int ABI (default)\n\ |
381 | -mlong use 32-bit int ABI\n\ | |
382 | -mshort-double use 32-bit double ABI\n\ | |
383 | -mlong-double use 64-bit double ABI (default)\n\ | |
60bcf0fa NC |
384 | --force-long-branchs always turn relative branchs into absolute ones\n\ |
385 | -S,--short-branchs do not turn relative branchs into absolute ones\n\ | |
386 | when the offset is out of range\n\ | |
387 | --strict-direct-mode do not turn the direct mode into extended mode\n\ | |
388 | when the instruction does not support direct mode\n\ | |
389 | --print-insn-syntax print the syntax of instruction in case of error\n\ | |
390 | --print-opcodes print the list of instructions with syntax\n\ | |
391 | --generate-example generate an example of each instruction\n\ | |
392 | (used for testing)\n"), default_cpu); | |
393 | ||
394 | } | |
395 | ||
396 | /* Try to identify the default target based on the BFD library. */ | |
397 | static void | |
398 | get_default_target () | |
399 | { | |
400 | const bfd_target *target; | |
401 | bfd abfd; | |
402 | ||
403 | if (current_architecture != 0) | |
404 | return; | |
405 | ||
406 | default_cpu = "unknown"; | |
407 | target = bfd_find_target (0, &abfd); | |
408 | if (target && target->name) | |
409 | { | |
410 | if (strcmp (target->name, "elf32-m68hc12") == 0) | |
411 | { | |
412 | current_architecture = cpu6812; | |
413 | default_cpu = "m68hc12"; | |
414 | } | |
415 | else if (strcmp (target->name, "elf32-m68hc11") == 0) | |
416 | { | |
417 | current_architecture = cpu6811; | |
418 | default_cpu = "m68hc11"; | |
419 | } | |
420 | else | |
421 | { | |
422 | as_bad (_("Default target `%s' is not supported."), target->name); | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | void | |
428 | m68hc11_print_statistics (file) | |
429 | FILE *file; | |
430 | { | |
431 | int i; | |
432 | struct m68hc11_opcode_def *opc; | |
433 | ||
434 | hash_print_statistics (file, "opcode table", m68hc11_hash); | |
435 | ||
436 | opc = m68hc11_opcode_defs; | |
437 | if (opc == 0 || m68hc11_nb_opcode_defs == 0) | |
438 | return; | |
439 | ||
440 | /* Dump the opcode statistics table. */ | |
441 | fprintf (file, _("Name # Modes Min ops Max ops Modes mask # Used\n")); | |
442 | for (i = 0; i < m68hc11_nb_opcode_defs; i++, opc++) | |
443 | { | |
444 | fprintf (file, "%-7.7s %5d %7d %7d 0x%08lx %7d\n", | |
445 | opc->opcode->name, | |
446 | opc->nb_modes, | |
447 | opc->min_operands, opc->max_operands, opc->format, opc->used); | |
448 | } | |
449 | } | |
450 | ||
451 | int | |
452 | md_parse_option (c, arg) | |
453 | int c; | |
454 | char *arg; | |
455 | { | |
456 | get_default_target (); | |
457 | switch (c) | |
458 | { | |
986c6f4b | 459 | /* -S means keep external to 2 bit offset rather than 16 bit one. */ |
60bcf0fa NC |
460 | case OPTION_SHORT_BRANCHS: |
461 | case 'S': | |
462 | flag_fixed_branchs = 1; | |
463 | break; | |
464 | ||
465 | case OPTION_FORCE_LONG_BRANCH: | |
466 | flag_force_long_jumps = 1; | |
467 | break; | |
468 | ||
469 | case OPTION_PRINT_INSN_SYNTAX: | |
470 | flag_print_insn_syntax = 1; | |
471 | break; | |
472 | ||
473 | case OPTION_PRINT_OPCODES: | |
474 | flag_print_opcodes = 1; | |
475 | break; | |
476 | ||
477 | case OPTION_STRICT_DIRECT_MODE: | |
478 | flag_strict_direct_addressing = 0; | |
479 | break; | |
480 | ||
481 | case OPTION_GENERATE_EXAMPLE: | |
482 | flag_print_opcodes = 2; | |
483 | break; | |
484 | ||
2f904664 SC |
485 | case OPTION_MSHORT: |
486 | elf_flags &= ~E_M68HC11_I32; | |
487 | break; | |
488 | ||
489 | case OPTION_MLONG: | |
490 | elf_flags |= E_M68HC11_I32; | |
491 | break; | |
492 | ||
493 | case OPTION_MSHORT_DOUBLE: | |
494 | elf_flags &= ~E_M68HC11_F64; | |
495 | break; | |
496 | ||
497 | case OPTION_MLONG_DOUBLE: | |
498 | elf_flags |= E_M68HC11_F64; | |
499 | break; | |
500 | ||
60bcf0fa NC |
501 | case 'm': |
502 | if (strcasecmp (arg, "68hc11") == 0) | |
503 | current_architecture = cpu6811; | |
504 | else if (strcasecmp (arg, "68hc12") == 0) | |
505 | current_architecture = cpu6812; | |
506 | else | |
507 | as_bad (_("Option `%s' is not recognized."), arg); | |
508 | break; | |
509 | ||
510 | default: | |
511 | return 0; | |
512 | } | |
513 | ||
514 | return 1; | |
515 | } | |
516 | \f | |
517 | symbolS * | |
518 | md_undefined_symbol (name) | |
519 | char *name ATTRIBUTE_UNUSED; | |
520 | { | |
521 | return 0; | |
522 | } | |
523 | ||
fafb6d17 | 524 | /* Equal to MAX_PRECISION in atof-ieee.c. */ |
60bcf0fa NC |
525 | #define MAX_LITTLENUMS 6 |
526 | ||
527 | /* Turn a string in input_line_pointer into a floating point constant | |
bc0d738a NC |
528 | of type TYPE, and store the appropriate bytes in *LITP. The number |
529 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
60bcf0fa | 530 | returned, or NULL on OK. */ |
60bcf0fa NC |
531 | char * |
532 | md_atof (type, litP, sizeP) | |
533 | char type; | |
534 | char *litP; | |
535 | int *sizeP; | |
536 | { | |
537 | int prec; | |
538 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
539 | LITTLENUM_TYPE *wordP; | |
540 | char *t; | |
541 | ||
542 | switch (type) | |
543 | { | |
544 | case 'f': | |
545 | case 'F': | |
546 | case 's': | |
547 | case 'S': | |
548 | prec = 2; | |
549 | break; | |
550 | ||
551 | case 'd': | |
552 | case 'D': | |
553 | case 'r': | |
554 | case 'R': | |
555 | prec = 4; | |
556 | break; | |
557 | ||
558 | case 'x': | |
559 | case 'X': | |
560 | prec = 6; | |
561 | break; | |
562 | ||
563 | case 'p': | |
564 | case 'P': | |
565 | prec = 6; | |
566 | break; | |
567 | ||
568 | default: | |
569 | *sizeP = 0; | |
570 | return _("Bad call to MD_ATOF()"); | |
571 | } | |
572 | t = atof_ieee (input_line_pointer, type, words); | |
573 | if (t) | |
574 | input_line_pointer = t; | |
575 | ||
576 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
577 | for (wordP = words; prec--;) | |
578 | { | |
579 | md_number_to_chars (litP, (long) (*wordP++), sizeof (LITTLENUM_TYPE)); | |
580 | litP += sizeof (LITTLENUM_TYPE); | |
581 | } | |
582 | return 0; | |
583 | } | |
584 | ||
585 | valueT | |
586 | md_section_align (seg, addr) | |
587 | asection *seg; | |
588 | valueT addr; | |
589 | { | |
590 | int align = bfd_get_section_alignment (stdoutput, seg); | |
591 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
592 | } | |
593 | ||
60bcf0fa NC |
594 | static int |
595 | cmp_opcode (op1, op2) | |
596 | struct m68hc11_opcode *op1; | |
597 | struct m68hc11_opcode *op2; | |
598 | { | |
599 | return strcmp (op1->name, op2->name); | |
600 | } | |
601 | ||
7bfda7eb SC |
602 | #define IS_CALL_SYMBOL(MODE) \ |
603 | (((MODE) & (M6812_OP_PAGE|M6811_OP_IND16)) \ | |
604 | == ((M6812_OP_PAGE|M6811_OP_IND16))) | |
605 | ||
60bcf0fa NC |
606 | /* Initialize the assembler. Create the opcode hash table |
607 | (sorted on the names) with the M6811 opcode table | |
608 | (from opcode library). */ | |
609 | void | |
610 | md_begin () | |
611 | { | |
612 | char *prev_name = ""; | |
613 | struct m68hc11_opcode *opcodes; | |
614 | struct m68hc11_opcode_def *opc = 0; | |
615 | int i, j; | |
616 | ||
617 | get_default_target (); | |
618 | ||
619 | m68hc11_hash = hash_new (); | |
620 | ||
621 | /* Get a writable copy of the opcode table and sort it on the names. */ | |
622 | opcodes = (struct m68hc11_opcode *) xmalloc (m68hc11_num_opcodes * | |
623 | sizeof (struct | |
624 | m68hc11_opcode)); | |
625 | m68hc11_sorted_opcodes = opcodes; | |
626 | num_opcodes = 0; | |
627 | for (i = 0; i < m68hc11_num_opcodes; i++) | |
628 | { | |
629 | if (m68hc11_opcodes[i].arch & current_architecture) | |
630 | { | |
631 | opcodes[num_opcodes] = m68hc11_opcodes[i]; | |
632 | if (opcodes[num_opcodes].name[0] == 'b' | |
633 | && opcodes[num_opcodes].format & M6811_OP_JUMP_REL | |
634 | && !(opcodes[num_opcodes].format & M6811_OP_BITMASK)) | |
635 | { | |
636 | num_opcodes++; | |
637 | opcodes[num_opcodes] = m68hc11_opcodes[i]; | |
638 | } | |
639 | num_opcodes++; | |
640 | for (j = 0; alias_opcodes[j].name != 0; j++) | |
641 | if (strcmp (m68hc11_opcodes[i].name, alias_opcodes[j].name) == 0) | |
642 | { | |
643 | opcodes[num_opcodes] = m68hc11_opcodes[i]; | |
644 | opcodes[num_opcodes].name = alias_opcodes[j].alias; | |
645 | num_opcodes++; | |
646 | break; | |
647 | } | |
648 | } | |
649 | } | |
1910266d SC |
650 | qsort (opcodes, num_opcodes, sizeof (struct m68hc11_opcode), |
651 | (int (*) PARAMS ((const PTR, const PTR))) cmp_opcode); | |
60bcf0fa NC |
652 | |
653 | opc = (struct m68hc11_opcode_def *) | |
654 | xmalloc (num_opcodes * sizeof (struct m68hc11_opcode_def)); | |
655 | m68hc11_opcode_defs = opc--; | |
656 | ||
657 | /* Insert unique names into hash table. The M6811 instruction set | |
658 | has several identical opcode names that have different opcodes based | |
659 | on the operands. This hash table then provides a quick index to | |
660 | the first opcode with a particular name in the opcode table. */ | |
661 | for (i = 0; i < num_opcodes; i++, opcodes++) | |
662 | { | |
663 | int expect; | |
664 | ||
665 | if (strcmp (prev_name, opcodes->name)) | |
666 | { | |
667 | prev_name = (char *) opcodes->name; | |
668 | ||
669 | opc++; | |
670 | opc->format = 0; | |
671 | opc->min_operands = 100; | |
672 | opc->max_operands = 0; | |
673 | opc->nb_modes = 0; | |
674 | opc->opcode = opcodes; | |
675 | opc->used = 0; | |
676 | hash_insert (m68hc11_hash, opcodes->name, (char *) opc); | |
677 | } | |
678 | opc->nb_modes++; | |
679 | opc->format |= opcodes->format; | |
680 | ||
681 | /* See how many operands this opcode needs. */ | |
682 | expect = 0; | |
683 | if (opcodes->format & M6811_OP_MASK) | |
684 | expect++; | |
685 | if (opcodes->format & M6811_OP_BITMASK) | |
686 | expect++; | |
687 | if (opcodes->format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
688 | expect++; | |
689 | if (opcodes->format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)) | |
690 | expect++; | |
7bfda7eb SC |
691 | /* Special case for call instruction. */ |
692 | if ((opcodes->format & M6812_OP_PAGE) | |
693 | && !(opcodes->format & M6811_OP_IND16)) | |
694 | expect++; | |
60bcf0fa NC |
695 | |
696 | if (expect < opc->min_operands) | |
697 | opc->min_operands = expect; | |
7bfda7eb SC |
698 | if (IS_CALL_SYMBOL (opcodes->format)) |
699 | expect++; | |
60bcf0fa NC |
700 | if (expect > opc->max_operands) |
701 | opc->max_operands = expect; | |
702 | } | |
703 | opc++; | |
704 | m68hc11_nb_opcode_defs = opc - m68hc11_opcode_defs; | |
705 | ||
706 | if (flag_print_opcodes) | |
707 | { | |
708 | print_opcode_list (); | |
709 | exit (EXIT_SUCCESS); | |
710 | } | |
711 | } | |
712 | ||
713 | void | |
714 | m68hc11_init_after_args () | |
715 | { | |
716 | } | |
60bcf0fa NC |
717 | \f |
718 | /* Builtin help. */ | |
719 | ||
720 | /* Return a string that represents the operand format for the instruction. | |
721 | When example is true, this generates an example of operand. This is used | |
722 | to give an example and also to generate a test. */ | |
723 | static char * | |
724 | print_opcode_format (opcode, example) | |
725 | struct m68hc11_opcode *opcode; | |
726 | int example; | |
727 | { | |
728 | static char buf[128]; | |
729 | int format = opcode->format; | |
730 | char *p; | |
731 | ||
732 | p = buf; | |
733 | buf[0] = 0; | |
734 | if (format & M6811_OP_IMM8) | |
735 | { | |
736 | if (example) | |
737 | sprintf (p, "#%d", rand () & 0x0FF); | |
738 | else | |
739 | strcpy (p, _("#<imm8>")); | |
740 | p = &p[strlen (p)]; | |
741 | } | |
742 | ||
743 | if (format & M6811_OP_IMM16) | |
744 | { | |
745 | if (example) | |
746 | sprintf (p, "#%d", rand () & 0x0FFFF); | |
747 | else | |
748 | strcpy (p, _("#<imm16>")); | |
749 | p = &p[strlen (p)]; | |
750 | } | |
751 | ||
752 | if (format & M6811_OP_IX) | |
753 | { | |
754 | if (example) | |
755 | sprintf (p, "%d,X", rand () & 0x0FF); | |
756 | else | |
757 | strcpy (p, _("<imm8>,X")); | |
758 | p = &p[strlen (p)]; | |
759 | } | |
760 | ||
761 | if (format & M6811_OP_IY) | |
762 | { | |
763 | if (example) | |
764 | sprintf (p, "%d,X", rand () & 0x0FF); | |
765 | else | |
766 | strcpy (p, _("<imm8>,X")); | |
767 | p = &p[strlen (p)]; | |
768 | } | |
769 | ||
770 | if (format & M6812_OP_IDX) | |
771 | { | |
772 | if (example) | |
773 | sprintf (p, "%d,X", rand () & 0x0FF); | |
774 | else | |
775 | strcpy (p, "n,r"); | |
776 | p = &p[strlen (p)]; | |
777 | } | |
778 | ||
7bfda7eb SC |
779 | if (format & M6812_OP_PAGE) |
780 | { | |
781 | if (example) | |
782 | sprintf (p, ", %d", rand () & 0x0FF); | |
783 | else | |
784 | strcpy (p, ", <page>"); | |
785 | p = &p[strlen (p)]; | |
786 | } | |
787 | ||
60bcf0fa NC |
788 | if (format & M6811_OP_DIRECT) |
789 | { | |
790 | if (example) | |
791 | sprintf (p, "*Z%d", rand () & 0x0FF); | |
792 | else | |
793 | strcpy (p, _("*<abs8>")); | |
794 | p = &p[strlen (p)]; | |
795 | } | |
796 | ||
797 | if (format & M6811_OP_BITMASK) | |
798 | { | |
799 | if (buf[0]) | |
800 | *p++ = ' '; | |
801 | ||
802 | if (example) | |
803 | sprintf (p, "#$%02x", rand () & 0x0FF); | |
804 | else | |
805 | strcpy (p, _("#<mask>")); | |
806 | ||
807 | p = &p[strlen (p)]; | |
808 | if (format & M6811_OP_JUMP_REL) | |
809 | *p++ = ' '; | |
810 | } | |
811 | ||
812 | if (format & M6811_OP_IND16) | |
813 | { | |
814 | if (example) | |
815 | sprintf (p, _("symbol%d"), rand () & 0x0FF); | |
816 | else | |
817 | strcpy (p, _("<abs>")); | |
818 | ||
819 | p = &p[strlen (p)]; | |
820 | } | |
821 | ||
822 | if (format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
823 | { | |
824 | if (example) | |
825 | { | |
826 | if (format & M6811_OP_BITMASK) | |
827 | { | |
828 | sprintf (p, ".+%d", rand () & 0x7F); | |
829 | } | |
830 | else | |
831 | { | |
832 | sprintf (p, "L%d", rand () & 0x0FF); | |
833 | } | |
834 | } | |
835 | else | |
836 | strcpy (p, _("<label>")); | |
837 | } | |
838 | ||
839 | return buf; | |
840 | } | |
841 | ||
842 | /* Prints the list of instructions with the possible operands. */ | |
843 | static void | |
844 | print_opcode_list () | |
845 | { | |
846 | int i; | |
847 | char *prev_name = ""; | |
848 | struct m68hc11_opcode *opcodes; | |
849 | int example = flag_print_opcodes == 2; | |
850 | ||
851 | if (example) | |
fafb6d17 NC |
852 | printf (_("# Example of `%s' instructions\n\t.sect .text\n_start:\n"), |
853 | default_cpu); | |
60bcf0fa NC |
854 | |
855 | opcodes = m68hc11_sorted_opcodes; | |
856 | ||
857 | /* Walk the list sorted on names (by md_begin). We only report | |
858 | one instruction per line, and we collect the different operand | |
859 | formats. */ | |
860 | for (i = 0; i < num_opcodes; i++, opcodes++) | |
861 | { | |
862 | char *fmt = print_opcode_format (opcodes, example); | |
863 | ||
864 | if (example) | |
865 | { | |
866 | printf ("L%d:\t", i); | |
867 | printf ("%s %s\n", opcodes->name, fmt); | |
868 | } | |
869 | else | |
870 | { | |
871 | if (strcmp (prev_name, opcodes->name)) | |
872 | { | |
873 | if (i > 0) | |
874 | printf ("\n"); | |
875 | ||
876 | printf ("%-5.5s ", opcodes->name); | |
877 | prev_name = (char *) opcodes->name; | |
878 | } | |
879 | if (fmt[0]) | |
880 | printf (" [%s]", fmt); | |
881 | } | |
882 | } | |
883 | printf ("\n"); | |
884 | } | |
885 | ||
60bcf0fa NC |
886 | /* Print the instruction format. This operation is called when some |
887 | instruction is not correct. Instruction format is printed as an | |
888 | error message. */ | |
889 | static void | |
890 | print_insn_format (name) | |
891 | char *name; | |
892 | { | |
893 | struct m68hc11_opcode_def *opc; | |
894 | struct m68hc11_opcode *opcode; | |
895 | char buf[128]; | |
896 | ||
897 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, name); | |
898 | if (opc == NULL) | |
899 | { | |
900 | as_bad (_("Instruction `%s' is not recognized."), name); | |
901 | return; | |
902 | } | |
903 | opcode = opc->opcode; | |
904 | ||
905 | as_bad (_("Instruction formats for `%s':"), name); | |
906 | do | |
907 | { | |
908 | char *fmt; | |
909 | ||
27302d63 | 910 | fmt = print_opcode_format (opcode, 0); |
60bcf0fa NC |
911 | sprintf (buf, "\t%-5.5s %s", opcode->name, fmt); |
912 | ||
913 | as_bad ("%s", buf); | |
914 | opcode++; | |
915 | } | |
916 | while (strcmp (opcode->name, name) == 0); | |
917 | } | |
60bcf0fa NC |
918 | \f |
919 | /* Analysis of 68HC11 and 68HC12 operands. */ | |
920 | ||
921 | /* reg_name_search() finds the register number given its name. | |
922 | Returns the register number or REG_NONE on failure. */ | |
923 | static register_id | |
924 | reg_name_search (name) | |
925 | char *name; | |
926 | { | |
927 | if (strcasecmp (name, "x") == 0 || strcasecmp (name, "ix") == 0) | |
928 | return REG_X; | |
929 | if (strcasecmp (name, "y") == 0 || strcasecmp (name, "iy") == 0) | |
930 | return REG_Y; | |
931 | if (strcasecmp (name, "a") == 0) | |
932 | return REG_A; | |
933 | if (strcasecmp (name, "b") == 0) | |
934 | return REG_B; | |
935 | if (strcasecmp (name, "d") == 0) | |
936 | return REG_D; | |
937 | if (strcasecmp (name, "sp") == 0) | |
938 | return REG_SP; | |
939 | if (strcasecmp (name, "pc") == 0) | |
940 | return REG_PC; | |
941 | if (strcasecmp (name, "ccr") == 0) | |
942 | return REG_CCR; | |
943 | ||
944 | return REG_NONE; | |
945 | } | |
946 | ||
947 | static char * | |
948 | skip_whites (p) | |
949 | char *p; | |
950 | { | |
951 | while (*p == ' ' || *p == '\t') | |
952 | p++; | |
953 | ||
954 | return p; | |
955 | } | |
956 | ||
fafb6d17 | 957 | /* Check the string at input_line_pointer |
60bcf0fa NC |
958 | to see if it is a valid register name. */ |
959 | static register_id | |
960 | register_name () | |
961 | { | |
962 | register_id reg_number; | |
963 | char c, *p = input_line_pointer; | |
964 | ||
965 | if (!is_name_beginner (*p++)) | |
966 | return REG_NONE; | |
967 | ||
968 | while (is_part_of_name (*p++)) | |
969 | continue; | |
970 | ||
971 | c = *--p; | |
972 | if (c) | |
973 | *p++ = 0; | |
974 | ||
fafb6d17 | 975 | /* Look to see if it's in the register table. */ |
60bcf0fa NC |
976 | reg_number = reg_name_search (input_line_pointer); |
977 | if (reg_number != REG_NONE) | |
978 | { | |
979 | if (c) | |
980 | *--p = c; | |
981 | ||
982 | input_line_pointer = p; | |
983 | return reg_number; | |
984 | } | |
985 | if (c) | |
986 | *--p = c; | |
987 | ||
988 | return reg_number; | |
989 | } | |
990 | ||
fafb6d17 | 991 | /* Parse a string of operands and return an array of expressions. |
60bcf0fa | 992 | |
7bfda7eb SC |
993 | Operand mode[0] mode[1] exp[0] exp[1] |
994 | #n M6811_OP_IMM16 - O_* | |
995 | *<exp> M6811_OP_DIRECT - O_* | |
996 | .{+-}<exp> M6811_OP_JUMP_REL - O_* | |
997 | <exp> M6811_OP_IND16 - O_* | |
998 | ,r N,r M6812_OP_IDX M6812_OP_REG O_constant O_register | |
999 | n,-r M6812_PRE_DEC M6812_OP_REG O_constant O_register | |
1000 | n,+r M6812_PRE_INC " " | |
1001 | n,r- M6812_POST_DEC " " | |
1002 | n,r+ M6812_POST_INC " " | |
1003 | A,r B,r D,r M6811_OP_REG M6812_OP_REG O_register O_register | |
1004 | [D,r] M6811_OP_D_IDX M6812_OP_REG O_register O_register | |
1005 | [n,r] M6811_OP_D_IDX_2 M6812_OP_REG O_constant O_register */ | |
60bcf0fa NC |
1006 | static int |
1007 | get_operand (oper, which, opmode) | |
1008 | operand *oper; | |
1009 | int which; | |
1010 | long opmode; | |
1011 | { | |
1012 | char *p = input_line_pointer; | |
1013 | int mode; | |
1014 | register_id reg; | |
1015 | ||
1016 | oper->exp.X_op = O_absent; | |
1017 | oper->reg1 = REG_NONE; | |
1018 | oper->reg2 = REG_NONE; | |
1019 | mode = M6811_OP_NONE; | |
1020 | ||
1021 | p = skip_whites (p); | |
1022 | ||
1023 | if (*p == 0 || *p == '\n' || *p == '\r') | |
1024 | { | |
1025 | input_line_pointer = p; | |
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | if (*p == '*' && (opmode & (M6811_OP_DIRECT | M6811_OP_IND16))) | |
1030 | { | |
1031 | mode = M6811_OP_DIRECT; | |
1032 | p++; | |
1033 | } | |
1034 | else if (*p == '#') | |
1035 | { | |
1036 | if (!(opmode & (M6811_OP_IMM8 | M6811_OP_IMM16 | M6811_OP_BITMASK))) | |
1037 | { | |
1038 | as_bad (_("Immediate operand is not allowed for operand %d."), | |
fafb6d17 | 1039 | which); |
60bcf0fa NC |
1040 | return -1; |
1041 | } | |
1042 | ||
1043 | mode = M6811_OP_IMM16; | |
1044 | p++; | |
1045 | if (strncmp (p, "%hi", 3) == 0) | |
1046 | { | |
1047 | p += 3; | |
1048 | mode |= M6811_OP_HIGH_ADDR; | |
1049 | } | |
1050 | else if (strncmp (p, "%lo", 3) == 0) | |
1051 | { | |
1052 | p += 3; | |
1053 | mode |= M6811_OP_LOW_ADDR; | |
1054 | } | |
1055 | } | |
1056 | else if (*p == '.' && (p[1] == '+' || p[1] == '-')) | |
1057 | { | |
1058 | p++; | |
1059 | mode = M6811_OP_JUMP_REL; | |
1060 | } | |
1061 | else if (*p == '[') | |
1062 | { | |
1063 | if (current_architecture & cpu6811) | |
1064 | as_bad (_("Indirect indexed addressing is not valid for 68HC11.")); | |
1065 | ||
1066 | p++; | |
7bfda7eb | 1067 | mode = M6812_OP_D_IDX; |
60bcf0fa NC |
1068 | p = skip_whites (p); |
1069 | } | |
1070 | else if (*p == ',') /* Special handling of ,x and ,y. */ | |
1071 | { | |
1072 | p++; | |
1073 | input_line_pointer = p; | |
1074 | ||
1075 | reg = register_name (); | |
1076 | if (reg != REG_NONE) | |
1077 | { | |
1078 | oper->reg1 = reg; | |
1079 | oper->exp.X_op = O_constant; | |
1080 | oper->exp.X_add_number = 0; | |
1081 | oper->mode = M6812_OP_IDX; | |
1082 | return 1; | |
1083 | } | |
1084 | as_bad (_("Spurious `,' or bad indirect register addressing mode.")); | |
1085 | return -1; | |
1086 | } | |
1087 | input_line_pointer = p; | |
1088 | ||
7bfda7eb | 1089 | if (mode == M6811_OP_NONE || mode == M6812_OP_D_IDX) |
60bcf0fa NC |
1090 | reg = register_name (); |
1091 | else | |
1092 | reg = REG_NONE; | |
1093 | ||
1094 | if (reg != REG_NONE) | |
1095 | { | |
1096 | p = skip_whites (input_line_pointer); | |
7bfda7eb | 1097 | if (*p == ']' && mode == M6812_OP_D_IDX) |
60bcf0fa NC |
1098 | { |
1099 | as_bad | |
1100 | (_("Missing second register or offset for indexed-indirect mode.")); | |
1101 | return -1; | |
1102 | } | |
1103 | ||
1104 | oper->reg1 = reg; | |
1105 | oper->mode = mode | M6812_OP_REG; | |
1106 | if (*p != ',') | |
1107 | { | |
7bfda7eb | 1108 | if (mode == M6812_OP_D_IDX) |
60bcf0fa NC |
1109 | { |
1110 | as_bad (_("Missing second register for indexed-indirect mode.")); | |
1111 | return -1; | |
1112 | } | |
1113 | return 1; | |
1114 | } | |
1115 | ||
1116 | p++; | |
1117 | input_line_pointer = p; | |
1118 | reg = register_name (); | |
1119 | if (reg != REG_NONE) | |
1120 | { | |
1121 | p = skip_whites (input_line_pointer); | |
7bfda7eb | 1122 | if (mode == M6812_OP_D_IDX) |
60bcf0fa NC |
1123 | { |
1124 | if (*p != ']') | |
1125 | { | |
1126 | as_bad (_("Missing `]' to close indexed-indirect mode.")); | |
1127 | return -1; | |
1128 | } | |
1129 | p++; | |
7bfda7eb | 1130 | oper->mode = M6812_OP_D_IDX; |
60bcf0fa NC |
1131 | } |
1132 | input_line_pointer = p; | |
1133 | ||
1134 | oper->reg2 = reg; | |
1135 | return 1; | |
1136 | } | |
1137 | return 1; | |
1138 | } | |
1139 | ||
1140 | /* In MRI mode, isolate the operand because we can't distinguish | |
1141 | operands from comments. */ | |
1142 | if (flag_mri) | |
1143 | { | |
1144 | char c = 0; | |
1145 | ||
1146 | p = skip_whites (p); | |
1147 | while (*p && *p != ' ' && *p != '\t') | |
1148 | p++; | |
1149 | ||
1150 | if (*p) | |
1151 | { | |
1152 | c = *p; | |
1153 | *p = 0; | |
1154 | } | |
1155 | ||
1156 | /* Parse as an expression. */ | |
1157 | expression (&oper->exp); | |
1158 | ||
1159 | if (c) | |
1160 | { | |
1161 | *p = c; | |
1162 | } | |
1163 | } | |
1164 | else | |
1165 | { | |
1166 | expression (&oper->exp); | |
1167 | } | |
1168 | ||
1169 | if (oper->exp.X_op == O_illegal) | |
1170 | { | |
1171 | as_bad (_("Illegal operand.")); | |
1172 | return -1; | |
1173 | } | |
1174 | else if (oper->exp.X_op == O_absent) | |
1175 | { | |
1176 | as_bad (_("Missing operand.")); | |
1177 | return -1; | |
1178 | } | |
1179 | ||
1180 | p = input_line_pointer; | |
1181 | ||
1182 | if (mode == M6811_OP_NONE || mode == M6811_OP_DIRECT | |
7bfda7eb | 1183 | || mode == M6812_OP_D_IDX) |
60bcf0fa NC |
1184 | { |
1185 | p = skip_whites (input_line_pointer); | |
1186 | ||
1187 | if (*p == ',') | |
1188 | { | |
098f2ec3 KH |
1189 | int possible_mode = M6811_OP_NONE; |
1190 | char *old_input_line; | |
7bfda7eb SC |
1191 | |
1192 | old_input_line = p; | |
60bcf0fa NC |
1193 | p++; |
1194 | ||
1195 | /* 68HC12 pre increment or decrement. */ | |
1196 | if (mode == M6811_OP_NONE) | |
1197 | { | |
1198 | if (*p == '-') | |
1199 | { | |
ae3e85dd | 1200 | possible_mode = M6812_PRE_DEC; |
60bcf0fa | 1201 | p++; |
60bcf0fa NC |
1202 | } |
1203 | else if (*p == '+') | |
1204 | { | |
ae3e85dd | 1205 | possible_mode = M6812_PRE_INC; |
60bcf0fa | 1206 | p++; |
60bcf0fa NC |
1207 | } |
1208 | p = skip_whites (p); | |
1209 | } | |
1210 | input_line_pointer = p; | |
1211 | reg = register_name (); | |
1212 | ||
098f2ec3 KH |
1213 | /* Backtrack if we have a valid constant expression and |
1214 | it does not correspond to the offset of the 68HC12 indexed | |
1215 | addressing mode (as in N,x). */ | |
1216 | if (reg == REG_NONE && mode == M6811_OP_NONE | |
1217 | && possible_mode != M6811_OP_NONE) | |
1218 | { | |
1219 | oper->mode = M6811_OP_IND16 | M6811_OP_JUMP_REL; | |
1220 | input_line_pointer = skip_whites (old_input_line); | |
1221 | return 1; | |
1222 | } | |
1223 | ||
1224 | if (possible_mode != M6811_OP_NONE) | |
1225 | mode = possible_mode; | |
1226 | ||
1227 | if ((current_architecture & cpu6811) | |
1228 | && possible_mode != M6811_OP_NONE) | |
1229 | as_bad (_("Pre-increment mode is not valid for 68HC11")); | |
fafb6d17 | 1230 | /* Backtrack. */ |
60bcf0fa NC |
1231 | if (which == 0 && opmode & M6812_OP_IDX_P2 |
1232 | && reg != REG_X && reg != REG_Y | |
1233 | && reg != REG_PC && reg != REG_SP) | |
1234 | { | |
1235 | reg = REG_NONE; | |
1236 | input_line_pointer = p; | |
1237 | } | |
1238 | ||
1239 | if (reg == REG_NONE && mode != M6811_OP_DIRECT | |
1240 | && !(mode == M6811_OP_NONE && opmode & M6811_OP_IND16)) | |
1241 | { | |
1242 | as_bad (_("Wrong register in register indirect mode.")); | |
1243 | return -1; | |
1244 | } | |
7bfda7eb | 1245 | if (mode == M6812_OP_D_IDX) |
60bcf0fa NC |
1246 | { |
1247 | p = skip_whites (input_line_pointer); | |
1248 | if (*p++ != ']') | |
1249 | { | |
1250 | as_bad (_("Missing `]' to close register indirect operand.")); | |
1251 | return -1; | |
1252 | } | |
1253 | input_line_pointer = p; | |
7bfda7eb SC |
1254 | oper->reg1 = reg; |
1255 | oper->mode = M6812_OP_D_IDX_2; | |
1256 | return 1; | |
60bcf0fa NC |
1257 | } |
1258 | if (reg != REG_NONE) | |
1259 | { | |
1260 | oper->reg1 = reg; | |
1261 | if (mode == M6811_OP_NONE) | |
1262 | { | |
1263 | p = input_line_pointer; | |
1264 | if (*p == '-') | |
1265 | { | |
1266 | mode = M6812_POST_DEC; | |
1267 | p++; | |
1268 | if (current_architecture & cpu6811) | |
1269 | as_bad | |
1270 | (_("Post-decrement mode is not valid for 68HC11.")); | |
1271 | } | |
1272 | else if (*p == '+') | |
1273 | { | |
1274 | mode = M6812_POST_INC; | |
1275 | p++; | |
1276 | if (current_architecture & cpu6811) | |
1277 | as_bad | |
1278 | (_("Post-increment mode is not valid for 68HC11.")); | |
1279 | } | |
1280 | else | |
1281 | mode = M6812_OP_IDX; | |
1282 | ||
1283 | input_line_pointer = p; | |
1284 | } | |
1285 | else | |
1286 | mode |= M6812_OP_IDX; | |
1287 | ||
1288 | oper->mode = mode; | |
1289 | return 1; | |
1290 | } | |
7bfda7eb | 1291 | input_line_pointer = old_input_line; |
60bcf0fa NC |
1292 | } |
1293 | ||
1294 | if (mode == M6812_OP_D_IDX_2) | |
1295 | { | |
1296 | as_bad (_("Invalid indexed indirect mode.")); | |
1297 | return -1; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | /* If the mode is not known until now, this is either a label | |
1302 | or an indirect address. */ | |
1303 | if (mode == M6811_OP_NONE) | |
fafb6d17 | 1304 | mode = M6811_OP_IND16 | M6811_OP_JUMP_REL; |
60bcf0fa NC |
1305 | |
1306 | p = input_line_pointer; | |
1307 | while (*p == ' ' || *p == '\t') | |
1308 | p++; | |
1309 | input_line_pointer = p; | |
1310 | oper->mode = mode; | |
1311 | ||
1312 | return 1; | |
1313 | } | |
1314 | ||
1315 | #define M6812_AUTO_INC_DEC (M6812_PRE_INC | M6812_PRE_DEC \ | |
1316 | | M6812_POST_INC | M6812_POST_DEC) | |
1317 | ||
1318 | /* Checks that the number 'num' fits for a given mode. */ | |
1319 | static int | |
1320 | check_range (num, mode) | |
1321 | long num; | |
1322 | int mode; | |
1323 | { | |
1324 | /* Auto increment and decrement are ok for [-8..8] without 0. */ | |
1325 | if (mode & M6812_AUTO_INC_DEC) | |
fafb6d17 | 1326 | return (num != 0 && num <= 8 && num >= -8); |
60bcf0fa | 1327 | |
986c6f4b | 1328 | /* The 68HC12 supports 5, 9 and 16-bit offsets. */ |
60bcf0fa | 1329 | if (mode & (M6812_INDEXED_IND | M6812_INDEXED | M6812_OP_IDX)) |
fafb6d17 | 1330 | mode = M6811_OP_IND16; |
60bcf0fa NC |
1331 | |
1332 | if (mode & M6812_OP_JUMP_REL16) | |
1333 | mode = M6811_OP_IND16; | |
1334 | ||
7bfda7eb | 1335 | mode &= ~M6811_OP_BRANCH; |
60bcf0fa NC |
1336 | switch (mode) |
1337 | { | |
1338 | case M6811_OP_IX: | |
1339 | case M6811_OP_IY: | |
1340 | case M6811_OP_DIRECT: | |
1341 | return (num >= 0 && num <= 255) ? 1 : 0; | |
1342 | ||
1343 | case M6811_OP_BITMASK: | |
1344 | case M6811_OP_IMM8: | |
7bfda7eb | 1345 | case M6812_OP_PAGE: |
60bcf0fa NC |
1346 | return (((num & 0xFFFFFF00) == 0) || ((num & 0xFFFFFF00) == 0xFFFFFF00)) |
1347 | ? 1 : 0; | |
1348 | ||
1349 | case M6811_OP_JUMP_REL: | |
1350 | return (num >= -128 && num <= 127) ? 1 : 0; | |
1351 | ||
1352 | case M6811_OP_IND16: | |
7bfda7eb | 1353 | case M6811_OP_IND16 | M6812_OP_PAGE: |
60bcf0fa NC |
1354 | case M6811_OP_IMM16: |
1355 | return (((num & 0xFFFF0000) == 0) || ((num & 0xFFFF0000) == 0xFFFF0000)) | |
1356 | ? 1 : 0; | |
1357 | ||
1358 | case M6812_OP_IBCC_MARKER: | |
1359 | case M6812_OP_TBCC_MARKER: | |
1360 | case M6812_OP_DBCC_MARKER: | |
1361 | return (num >= -256 && num <= 255) ? 1 : 0; | |
1362 | ||
1363 | case M6812_OP_TRAP_ID: | |
1364 | return ((num >= 0x30 && num <= 0x39) | |
1365 | || (num >= 0x40 && num <= 0x0ff)) ? 1 : 0; | |
1366 | ||
1367 | default: | |
1368 | return 0; | |
1369 | } | |
1370 | } | |
60bcf0fa NC |
1371 | \f |
1372 | /* Gas fixup generation. */ | |
1373 | ||
1374 | /* Put a 1 byte expression described by 'oper'. If this expression contains | |
1375 | unresolved symbols, generate an 8-bit fixup. */ | |
1376 | static void | |
1377 | fixup8 (oper, mode, opmode) | |
1378 | expressionS *oper; | |
1379 | int mode; | |
1380 | int opmode; | |
1381 | { | |
1382 | char *f; | |
1383 | ||
1384 | f = frag_more (1); | |
1385 | ||
1386 | if (oper->X_op == O_constant) | |
1387 | { | |
1388 | if (mode & M6812_OP_TRAP_ID | |
1389 | && !check_range (oper->X_add_number, M6812_OP_TRAP_ID)) | |
1390 | { | |
1391 | static char trap_id_warn_once = 0; | |
1392 | ||
1393 | as_bad (_("Trap id `%ld' is out of range."), oper->X_add_number); | |
1394 | if (trap_id_warn_once == 0) | |
1395 | { | |
1396 | trap_id_warn_once = 1; | |
1397 | as_bad (_("Trap id must be within [0x30..0x39] or [0x40..0xff].")); | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | if (!(mode & M6812_OP_TRAP_ID) | |
1402 | && !check_range (oper->X_add_number, mode)) | |
1403 | { | |
1404 | as_bad (_("Operand out of 8-bit range: `%ld'."), oper->X_add_number); | |
1405 | } | |
1406 | number_to_chars_bigendian (f, oper->X_add_number & 0x0FF, 1); | |
1407 | } | |
1408 | else if (oper->X_op != O_register) | |
1409 | { | |
1410 | if (mode & M6812_OP_TRAP_ID) | |
1411 | as_bad (_("The trap id must be a constant.")); | |
1412 | ||
1413 | if (mode == M6811_OP_JUMP_REL) | |
1414 | { | |
1415 | fixS *fixp; | |
1416 | ||
1417 | fixp = fix_new_exp (frag_now, f - frag_now->fr_literal, 1, | |
b34976b6 | 1418 | oper, TRUE, BFD_RELOC_8_PCREL); |
60bcf0fa NC |
1419 | fixp->fx_pcrel_adjust = 1; |
1420 | } | |
1421 | else | |
1422 | { | |
1423 | /* Now create an 8-bit fixup. If there was some %hi or %lo | |
1424 | modifier, generate the reloc accordingly. */ | |
1425 | fix_new_exp (frag_now, f - frag_now->fr_literal, 1, | |
b34976b6 | 1426 | oper, FALSE, |
60bcf0fa NC |
1427 | ((opmode & M6811_OP_HIGH_ADDR) |
1428 | ? BFD_RELOC_M68HC11_HI8 | |
1429 | : ((opmode & M6811_OP_LOW_ADDR) | |
7bfda7eb SC |
1430 | ? BFD_RELOC_M68HC11_LO8 |
1431 | : ((mode & M6812_OP_PAGE) | |
1432 | ? BFD_RELOC_M68HC11_PAGE : BFD_RELOC_8)))); | |
60bcf0fa NC |
1433 | } |
1434 | number_to_chars_bigendian (f, 0, 1); | |
1435 | } | |
1436 | else | |
1437 | { | |
1438 | as_fatal (_("Operand `%x' not recognized in fixup8."), oper->X_op); | |
1439 | } | |
1440 | } | |
1441 | ||
986c6f4b | 1442 | /* Put a 2 byte expression described by 'oper'. If this expression contains |
60bcf0fa NC |
1443 | unresolved symbols, generate a 16-bit fixup. */ |
1444 | static void | |
1445 | fixup16 (oper, mode, opmode) | |
1446 | expressionS *oper; | |
1447 | int mode; | |
1448 | int opmode ATTRIBUTE_UNUSED; | |
1449 | { | |
1450 | char *f; | |
1451 | ||
1452 | f = frag_more (2); | |
1453 | ||
1454 | if (oper->X_op == O_constant) | |
1455 | { | |
1456 | if (!check_range (oper->X_add_number, mode)) | |
1457 | { | |
1458 | as_bad (_("Operand out of 16-bit range: `%ld'."), | |
fafb6d17 | 1459 | oper->X_add_number); |
60bcf0fa NC |
1460 | } |
1461 | number_to_chars_bigendian (f, oper->X_add_number & 0x0FFFF, 2); | |
1462 | } | |
1463 | else if (oper->X_op != O_register) | |
1464 | { | |
1465 | fixS *fixp; | |
1466 | ||
1467 | /* Now create a 16-bit fixup. */ | |
1468 | fixp = fix_new_exp (frag_now, f - frag_now->fr_literal, 2, | |
1469 | oper, | |
b34976b6 | 1470 | (mode & M6812_OP_JUMP_REL16 ? TRUE : FALSE), |
60bcf0fa | 1471 | (mode & M6812_OP_JUMP_REL16 |
7bfda7eb SC |
1472 | ? BFD_RELOC_16_PCREL |
1473 | : (mode & M6812_OP_PAGE) | |
1474 | ? BFD_RELOC_M68HC11_LO16 : BFD_RELOC_16)); | |
60bcf0fa NC |
1475 | number_to_chars_bigendian (f, 0, 2); |
1476 | if (mode & M6812_OP_JUMP_REL16) | |
1477 | fixp->fx_pcrel_adjust = 2; | |
1478 | } | |
1479 | else | |
1480 | { | |
1481 | as_fatal (_("Operand `%x' not recognized in fixup16."), oper->X_op); | |
1482 | } | |
1483 | } | |
7bfda7eb SC |
1484 | |
1485 | /* Put a 3 byte expression described by 'oper'. If this expression contains | |
1486 | unresolved symbols, generate a 24-bit fixup. */ | |
1487 | static void | |
1488 | fixup24 (oper, mode, opmode) | |
1489 | expressionS *oper; | |
1490 | int mode; | |
1491 | int opmode ATTRIBUTE_UNUSED; | |
1492 | { | |
1493 | char *f; | |
1494 | ||
1495 | f = frag_more (3); | |
1496 | ||
1497 | if (oper->X_op == O_constant) | |
1498 | { | |
1499 | if (!check_range (oper->X_add_number, mode)) | |
1500 | { | |
1501 | as_bad (_("Operand out of 16-bit range: `%ld'."), | |
1502 | oper->X_add_number); | |
1503 | } | |
1504 | number_to_chars_bigendian (f, oper->X_add_number & 0x0FFFFFF, 3); | |
1505 | } | |
1506 | else if (oper->X_op != O_register) | |
1507 | { | |
1508 | fixS *fixp; | |
1509 | ||
1510 | /* Now create a 24-bit fixup. */ | |
1511 | fixp = fix_new_exp (frag_now, f - frag_now->fr_literal, 2, | |
b34976b6 | 1512 | oper, FALSE, BFD_RELOC_M68HC11_24); |
7bfda7eb SC |
1513 | number_to_chars_bigendian (f, 0, 3); |
1514 | } | |
1515 | else | |
1516 | { | |
1517 | as_fatal (_("Operand `%x' not recognized in fixup16."), oper->X_op); | |
1518 | } | |
1519 | } | |
60bcf0fa NC |
1520 | \f |
1521 | /* 68HC11 and 68HC12 code generation. */ | |
1522 | ||
1523 | /* Translate the short branch/bsr instruction into a long branch. */ | |
1524 | static unsigned char | |
1525 | convert_branch (code) | |
1526 | unsigned char code; | |
1527 | { | |
1528 | if (IS_OPCODE (code, M6812_BSR)) | |
1529 | return M6812_JSR; | |
1530 | else if (IS_OPCODE (code, M6811_BSR)) | |
1531 | return M6811_JSR; | |
1532 | else if (IS_OPCODE (code, M6811_BRA)) | |
1533 | return (current_architecture & cpu6812) ? M6812_JMP : M6811_JMP; | |
1534 | else | |
1535 | as_fatal (_("Unexpected branch conversion with `%x'"), code); | |
1536 | ||
1537 | /* Keep gcc happy. */ | |
1538 | return M6811_JSR; | |
1539 | } | |
1540 | ||
1541 | /* Start a new insn that contains at least 'size' bytes. Record the | |
1542 | line information of that insn in the dwarf2 debug sections. */ | |
fafb6d17 | 1543 | static char * |
60bcf0fa NC |
1544 | m68hc11_new_insn (size) |
1545 | int size; | |
1546 | { | |
fafb6d17 | 1547 | char *f; |
60bcf0fa NC |
1548 | |
1549 | f = frag_more (size); | |
1550 | ||
4dc7ead9 | 1551 | dwarf2_emit_insn (size); |
fafb6d17 | 1552 | |
60bcf0fa NC |
1553 | return f; |
1554 | } | |
1555 | ||
1556 | /* Builds a jump instruction (bra, bcc, bsr). */ | |
1557 | static void | |
1558 | build_jump_insn (opcode, operands, nb_operands, jmp_mode) | |
1559 | struct m68hc11_opcode *opcode; | |
1560 | operand operands[]; | |
1561 | int nb_operands; | |
1562 | int jmp_mode; | |
1563 | { | |
1564 | unsigned char code; | |
60bcf0fa NC |
1565 | char *f; |
1566 | unsigned long n; | |
e371935f SC |
1567 | fragS *frag; |
1568 | int where; | |
60bcf0fa NC |
1569 | |
1570 | /* The relative branch convertion is not supported for | |
1571 | brclr and brset. */ | |
1572 | assert ((opcode->format & M6811_OP_BITMASK) == 0); | |
1573 | assert (nb_operands == 1); | |
1574 | assert (operands[0].reg1 == REG_NONE && operands[0].reg2 == REG_NONE); | |
1575 | ||
1576 | code = opcode->opcode; | |
60bcf0fa NC |
1577 | |
1578 | n = operands[0].exp.X_add_number; | |
1579 | ||
1580 | /* Turn into a long branch: | |
1581 | - when force long branch option (and not for jbcc pseudos), | |
1582 | - when jbcc and the constant is out of -128..127 range, | |
1583 | - when branch optimization is allowed and branch out of range. */ | |
1584 | if ((jmp_mode == 0 && flag_force_long_jumps) | |
1585 | || (operands[0].exp.X_op == O_constant | |
1586 | && (!check_range (n, opcode->format) && | |
1587 | (jmp_mode == 1 || flag_fixed_branchs == 0)))) | |
1588 | { | |
e371935f SC |
1589 | frag = frag_now; |
1590 | where = frag_now_fix (); | |
1591 | ||
1592 | fix_new (frag_now, frag_now_fix (), 1, | |
1593 | &abs_symbol, 0, 1, BFD_RELOC_M68HC11_RL_JUMP); | |
1594 | ||
60bcf0fa NC |
1595 | if (code == M6811_BSR || code == M6811_BRA || code == M6812_BSR) |
1596 | { | |
1597 | code = convert_branch (code); | |
1598 | ||
1599 | f = m68hc11_new_insn (1); | |
1600 | number_to_chars_bigendian (f, code, 1); | |
1601 | } | |
1602 | else if (current_architecture & cpu6812) | |
1603 | { | |
1604 | /* 68HC12: translate the bcc into a lbcc. */ | |
1605 | f = m68hc11_new_insn (2); | |
1606 | number_to_chars_bigendian (f, M6811_OPCODE_PAGE2, 1); | |
1607 | number_to_chars_bigendian (f + 1, code, 1); | |
1608 | fixup16 (&operands[0].exp, M6812_OP_JUMP_REL16, | |
1609 | M6812_OP_JUMP_REL16); | |
1610 | return; | |
1611 | } | |
1612 | else | |
1613 | { | |
1614 | /* 68HC11: translate the bcc into b!cc +3; jmp <L>. */ | |
1615 | f = m68hc11_new_insn (3); | |
1616 | code ^= 1; | |
1617 | number_to_chars_bigendian (f, code, 1); | |
1618 | number_to_chars_bigendian (f + 1, 3, 1); | |
1619 | number_to_chars_bigendian (f + 2, M6811_JMP, 1); | |
1620 | } | |
1621 | fixup16 (&operands[0].exp, M6811_OP_IND16, M6811_OP_IND16); | |
1622 | return; | |
1623 | } | |
1624 | ||
1625 | /* Branch with a constant that must fit in 8-bits. */ | |
1626 | if (operands[0].exp.X_op == O_constant) | |
1627 | { | |
1628 | if (!check_range (n, opcode->format)) | |
1629 | { | |
1630 | as_bad (_("Operand out of range for a relative branch: `%ld'"), | |
1631 | n); | |
1632 | } | |
1633 | else if (opcode->format & M6812_OP_JUMP_REL16) | |
1634 | { | |
1635 | f = m68hc11_new_insn (4); | |
1636 | number_to_chars_bigendian (f, M6811_OPCODE_PAGE2, 1); | |
1637 | number_to_chars_bigendian (f + 1, code, 1); | |
1638 | number_to_chars_bigendian (f + 2, n & 0x0ffff, 2); | |
1639 | } | |
1640 | else | |
1641 | { | |
1642 | f = m68hc11_new_insn (2); | |
1643 | number_to_chars_bigendian (f, code, 1); | |
1644 | number_to_chars_bigendian (f + 1, n & 0x0FF, 1); | |
1645 | } | |
1646 | } | |
1647 | else if (opcode->format & M6812_OP_JUMP_REL16) | |
1648 | { | |
e371935f SC |
1649 | frag = frag_now; |
1650 | where = frag_now_fix (); | |
1651 | ||
1652 | fix_new (frag_now, frag_now_fix (), 1, | |
1653 | &abs_symbol, 0, 1, BFD_RELOC_M68HC11_RL_JUMP); | |
1654 | ||
60bcf0fa NC |
1655 | f = m68hc11_new_insn (2); |
1656 | number_to_chars_bigendian (f, M6811_OPCODE_PAGE2, 1); | |
1657 | number_to_chars_bigendian (f + 1, code, 1); | |
1658 | fixup16 (&operands[0].exp, M6812_OP_JUMP_REL16, M6812_OP_JUMP_REL16); | |
1659 | } | |
1660 | else | |
1661 | { | |
1662 | char *opcode; | |
1663 | ||
e371935f SC |
1664 | frag = frag_now; |
1665 | where = frag_now_fix (); | |
1666 | ||
1667 | fix_new (frag_now, frag_now_fix (), 1, | |
1668 | &abs_symbol, 0, 1, BFD_RELOC_M68HC11_RL_JUMP); | |
1669 | ||
60bcf0fa NC |
1670 | /* Branch offset must fit in 8-bits, don't do some relax. */ |
1671 | if (jmp_mode == 0 && flag_fixed_branchs) | |
1672 | { | |
1673 | opcode = m68hc11_new_insn (1); | |
1674 | number_to_chars_bigendian (opcode, code, 1); | |
1675 | fixup8 (&operands[0].exp, M6811_OP_JUMP_REL, M6811_OP_JUMP_REL); | |
1676 | } | |
1677 | ||
1678 | /* bra/bsr made be changed into jmp/jsr. */ | |
1679 | else if (code == M6811_BSR || code == M6811_BRA || code == M6812_BSR) | |
1680 | { | |
4fe7ef96 SC |
1681 | /* Allocate worst case storage. */ |
1682 | opcode = m68hc11_new_insn (3); | |
60bcf0fa NC |
1683 | number_to_chars_bigendian (opcode, code, 1); |
1684 | number_to_chars_bigendian (opcode + 1, 0, 1); | |
4fe7ef96 SC |
1685 | frag_variant (rs_machine_dependent, 1, 1, |
1686 | ENCODE_RELAX (STATE_PC_RELATIVE, STATE_UNDF), | |
1687 | operands[0].exp.X_add_symbol, (offsetT) n, | |
1688 | opcode); | |
60bcf0fa NC |
1689 | } |
1690 | else if (current_architecture & cpu6812) | |
1691 | { | |
1692 | opcode = m68hc11_new_insn (2); | |
1693 | number_to_chars_bigendian (opcode, code, 1); | |
1694 | number_to_chars_bigendian (opcode + 1, 0, 1); | |
1695 | frag_var (rs_machine_dependent, 2, 2, | |
1696 | ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_UNDF), | |
1697 | operands[0].exp.X_add_symbol, (offsetT) n, opcode); | |
1698 | } | |
1699 | else | |
1700 | { | |
1701 | opcode = m68hc11_new_insn (2); | |
1702 | number_to_chars_bigendian (opcode, code, 1); | |
1703 | number_to_chars_bigendian (opcode + 1, 0, 1); | |
1704 | frag_var (rs_machine_dependent, 3, 3, | |
1705 | ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_UNDF), | |
1706 | operands[0].exp.X_add_symbol, (offsetT) n, opcode); | |
1707 | } | |
1708 | } | |
1709 | } | |
1710 | ||
1711 | /* Builds a dbne/dbeq/tbne/tbeq instruction. */ | |
1712 | static void | |
1713 | build_dbranch_insn (opcode, operands, nb_operands, jmp_mode) | |
1714 | struct m68hc11_opcode *opcode; | |
1715 | operand operands[]; | |
1716 | int nb_operands; | |
1717 | int jmp_mode; | |
1718 | { | |
1719 | unsigned char code; | |
60bcf0fa NC |
1720 | char *f; |
1721 | unsigned long n; | |
1722 | ||
1723 | /* The relative branch convertion is not supported for | |
1724 | brclr and brset. */ | |
1725 | assert ((opcode->format & M6811_OP_BITMASK) == 0); | |
1726 | assert (nb_operands == 2); | |
1727 | assert (operands[0].reg1 != REG_NONE); | |
1728 | ||
1729 | code = opcode->opcode & 0x0FF; | |
60bcf0fa NC |
1730 | |
1731 | f = m68hc11_new_insn (1); | |
1732 | number_to_chars_bigendian (f, code, 1); | |
1733 | ||
1734 | n = operands[1].exp.X_add_number; | |
1735 | code = operands[0].reg1; | |
1736 | ||
1737 | if (operands[0].reg1 == REG_NONE || operands[0].reg1 == REG_CCR | |
1738 | || operands[0].reg1 == REG_PC) | |
1739 | as_bad (_("Invalid register for dbcc/tbcc instruction.")); | |
1740 | ||
1741 | if (opcode->format & M6812_OP_IBCC_MARKER) | |
1742 | code |= 0x80; | |
1743 | else if (opcode->format & M6812_OP_TBCC_MARKER) | |
1744 | code |= 0x40; | |
1745 | ||
1746 | if (!(opcode->format & M6812_OP_EQ_MARKER)) | |
1747 | code |= 0x20; | |
1748 | ||
1749 | /* Turn into a long branch: | |
1750 | - when force long branch option (and not for jbcc pseudos), | |
1751 | - when jdbcc and the constant is out of -256..255 range, | |
1752 | - when branch optimization is allowed and branch out of range. */ | |
1753 | if ((jmp_mode == 0 && flag_force_long_jumps) | |
1754 | || (operands[1].exp.X_op == O_constant | |
1755 | && (!check_range (n, M6812_OP_IBCC_MARKER) && | |
1756 | (jmp_mode == 1 || flag_fixed_branchs == 0)))) | |
1757 | { | |
1758 | f = frag_more (2); | |
1759 | code ^= 0x20; | |
1760 | number_to_chars_bigendian (f, code, 1); | |
1761 | number_to_chars_bigendian (f + 1, M6812_JMP, 1); | |
1762 | fixup16 (&operands[0].exp, M6811_OP_IND16, M6811_OP_IND16); | |
1763 | return; | |
1764 | } | |
1765 | ||
1766 | /* Branch with a constant that must fit in 9-bits. */ | |
1767 | if (operands[1].exp.X_op == O_constant) | |
1768 | { | |
1769 | if (!check_range (n, M6812_OP_IBCC_MARKER)) | |
1770 | { | |
1771 | as_bad (_("Operand out of range for a relative branch: `%ld'"), | |
1772 | n); | |
1773 | } | |
1774 | else | |
1775 | { | |
1776 | if ((long) n < 0) | |
1777 | code |= 0x10; | |
1778 | ||
1779 | f = frag_more (2); | |
1780 | number_to_chars_bigendian (f, code, 1); | |
1781 | number_to_chars_bigendian (f + 1, n & 0x0FF, 1); | |
1782 | } | |
1783 | } | |
1784 | else | |
1785 | { | |
1786 | /* Branch offset must fit in 8-bits, don't do some relax. */ | |
1787 | if (jmp_mode == 0 && flag_fixed_branchs) | |
1788 | { | |
1789 | fixup8 (&operands[0].exp, M6811_OP_JUMP_REL, M6811_OP_JUMP_REL); | |
1790 | } | |
1791 | ||
1792 | else | |
1793 | { | |
1794 | f = frag_more (2); | |
1795 | number_to_chars_bigendian (f, code, 1); | |
1796 | number_to_chars_bigendian (f + 1, 0, 1); | |
1797 | frag_var (rs_machine_dependent, 3, 3, | |
1798 | ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_UNDF), | |
1799 | operands[1].exp.X_add_symbol, (offsetT) n, f); | |
1800 | } | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | #define OP_EXTENDED (M6811_OP_PAGE2 | M6811_OP_PAGE3 | M6811_OP_PAGE4) | |
1805 | ||
1806 | /* Assemble the post index byte for 68HC12 extended addressing modes. */ | |
1807 | static int | |
1808 | build_indexed_byte (op, format, move_insn) | |
1809 | operand *op; | |
1810 | int format ATTRIBUTE_UNUSED; | |
1811 | int move_insn; | |
1812 | { | |
1813 | unsigned char byte = 0; | |
1814 | char *f; | |
1815 | int mode; | |
1816 | long val; | |
1817 | ||
1818 | val = op->exp.X_add_number; | |
1819 | mode = op->mode; | |
1820 | if (mode & M6812_AUTO_INC_DEC) | |
1821 | { | |
1822 | byte = 0x20; | |
1823 | if (mode & (M6812_POST_INC | M6812_POST_DEC)) | |
1824 | byte |= 0x10; | |
1825 | ||
1826 | if (op->exp.X_op == O_constant) | |
1827 | { | |
1828 | if (!check_range (val, mode)) | |
1829 | { | |
1830 | as_bad (_("Increment/decrement value is out of range: `%ld'."), | |
fafb6d17 | 1831 | val); |
60bcf0fa NC |
1832 | } |
1833 | if (mode & (M6812_POST_INC | M6812_PRE_INC)) | |
1834 | byte |= (val - 1) & 0x07; | |
1835 | else | |
1836 | byte |= (8 - ((val) & 7)) | 0x8; | |
1837 | } | |
1838 | switch (op->reg1) | |
1839 | { | |
1840 | case REG_NONE: | |
1841 | as_fatal (_("Expecting a register.")); | |
1842 | ||
1843 | case REG_X: | |
1844 | byte |= 0; | |
1845 | break; | |
1846 | ||
1847 | case REG_Y: | |
1848 | byte |= 0x40; | |
1849 | break; | |
1850 | ||
1851 | case REG_SP: | |
1852 | byte |= 0x80; | |
1853 | break; | |
1854 | ||
1855 | default: | |
1856 | as_bad (_("Invalid register for post/pre increment.")); | |
1857 | break; | |
1858 | } | |
1859 | ||
1860 | f = frag_more (1); | |
1861 | number_to_chars_bigendian (f, byte, 1); | |
1862 | return 1; | |
1863 | } | |
1864 | ||
7bfda7eb | 1865 | if (mode & (M6812_OP_IDX | M6812_OP_D_IDX_2)) |
60bcf0fa NC |
1866 | { |
1867 | switch (op->reg1) | |
1868 | { | |
1869 | case REG_X: | |
1870 | byte = 0; | |
1871 | break; | |
1872 | ||
1873 | case REG_Y: | |
1874 | byte = 1; | |
1875 | break; | |
1876 | ||
1877 | case REG_SP: | |
1878 | byte = 2; | |
1879 | break; | |
1880 | ||
1881 | case REG_PC: | |
1882 | byte = 3; | |
1883 | break; | |
1884 | ||
1885 | default: | |
1886 | as_bad (_("Invalid register.")); | |
1887 | break; | |
1888 | } | |
1889 | if (op->exp.X_op == O_constant) | |
1890 | { | |
1891 | if (!check_range (val, M6812_OP_IDX)) | |
1892 | { | |
1893 | as_bad (_("Offset out of 16-bit range: %ld."), val); | |
1894 | } | |
1895 | ||
1896 | if (move_insn && !(val >= -16 && val <= 15)) | |
1897 | { | |
ae3e85dd | 1898 | as_bad (_("Offset out of 5-bit range for movw/movb insn: %ld."), |
098f2ec3 | 1899 | val); |
60bcf0fa NC |
1900 | return -1; |
1901 | } | |
1902 | ||
7bfda7eb | 1903 | if (val >= -16 && val <= 15 && !(mode & M6812_OP_D_IDX_2)) |
60bcf0fa NC |
1904 | { |
1905 | byte = byte << 6; | |
1906 | byte |= val & 0x1f; | |
1907 | f = frag_more (1); | |
1908 | number_to_chars_bigendian (f, byte, 1); | |
1909 | return 1; | |
1910 | } | |
7bfda7eb | 1911 | else if (val >= -256 && val <= 255 && !(mode & M6812_OP_D_IDX_2)) |
60bcf0fa NC |
1912 | { |
1913 | byte = byte << 3; | |
1914 | byte |= 0xe0; | |
1915 | if (val < 0) | |
1916 | byte |= 0x1; | |
1917 | f = frag_more (2); | |
1918 | number_to_chars_bigendian (f, byte, 1); | |
1919 | number_to_chars_bigendian (f + 1, val & 0x0FF, 1); | |
1920 | return 2; | |
1921 | } | |
1922 | else | |
1923 | { | |
1924 | byte = byte << 3; | |
7bfda7eb | 1925 | if (mode & M6812_OP_D_IDX_2) |
60bcf0fa NC |
1926 | byte |= 0xe3; |
1927 | else | |
1928 | byte |= 0xe2; | |
1929 | ||
1930 | f = frag_more (3); | |
1931 | number_to_chars_bigendian (f, byte, 1); | |
1932 | number_to_chars_bigendian (f + 1, val & 0x0FFFF, 2); | |
1933 | return 3; | |
1934 | } | |
1935 | } | |
7bfda7eb SC |
1936 | if (mode & M6812_OP_D_IDX_2) |
1937 | { | |
1938 | byte = (byte << 3) | 0xe3; | |
1939 | f = frag_more (1); | |
1940 | number_to_chars_bigendian (f, byte, 1); | |
1941 | ||
1942 | fixup16 (&op->exp, 0, 0); | |
1943 | } | |
1944 | else if (op->reg1 != REG_PC) | |
098f2ec3 | 1945 | { |
c9e03e8b SC |
1946 | symbolS *sym; |
1947 | offsetT off; | |
1948 | ||
098f2ec3 KH |
1949 | f = frag_more (1); |
1950 | number_to_chars_bigendian (f, byte, 1); | |
c9e03e8b SC |
1951 | sym = op->exp.X_add_symbol; |
1952 | off = op->exp.X_add_number; | |
1953 | if (op->exp.X_op != O_symbol) | |
1954 | { | |
1955 | sym = make_expr_symbol (&op->exp); | |
1956 | off = 0; | |
1957 | } | |
1958 | frag_var (rs_machine_dependent, 2, 2, | |
1959 | ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_UNDF), | |
1960 | sym, off, f); | |
098f2ec3 | 1961 | } |
88051039 | 1962 | else |
098f2ec3 KH |
1963 | { |
1964 | f = frag_more (1); | |
1965 | number_to_chars_bigendian (f, byte, 1); | |
1966 | frag_var (rs_machine_dependent, 2, 2, | |
75538612 | 1967 | ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_UNDF), |
098f2ec3 KH |
1968 | op->exp.X_add_symbol, |
1969 | op->exp.X_add_number, f); | |
1970 | } | |
60bcf0fa NC |
1971 | return 3; |
1972 | } | |
1973 | ||
7bfda7eb | 1974 | if (mode & (M6812_OP_REG | M6812_OP_D_IDX)) |
60bcf0fa | 1975 | { |
7bfda7eb | 1976 | if (mode & M6812_OP_D_IDX) |
60bcf0fa NC |
1977 | { |
1978 | if (op->reg1 != REG_D) | |
1979 | as_bad (_("Expecting register D for indexed indirect mode.")); | |
1980 | if (move_insn) | |
1981 | as_bad (_("Indexed indirect mode is not allowed for movb/movw.")); | |
1982 | ||
1983 | byte = 0xE7; | |
1984 | } | |
1985 | else | |
1986 | { | |
1987 | switch (op->reg1) | |
1988 | { | |
1989 | case REG_A: | |
1990 | byte = 0xE4; | |
1991 | break; | |
1992 | ||
1993 | case REG_B: | |
1994 | byte = 0xE5; | |
1995 | break; | |
1996 | ||
1997 | default: | |
1998 | as_bad (_("Invalid accumulator register.")); | |
1999 | ||
2000 | case REG_D: | |
2001 | byte = 0xE6; | |
2002 | break; | |
2003 | } | |
2004 | } | |
2005 | switch (op->reg2) | |
2006 | { | |
2007 | case REG_X: | |
2008 | break; | |
2009 | ||
2010 | case REG_Y: | |
2011 | byte |= (1 << 3); | |
2012 | break; | |
2013 | ||
2014 | case REG_SP: | |
2015 | byte |= (2 << 3); | |
2016 | break; | |
2017 | ||
2018 | case REG_PC: | |
2019 | byte |= (3 << 3); | |
2020 | break; | |
2021 | ||
2022 | default: | |
2023 | as_bad (_("Invalid indexed register.")); | |
2024 | break; | |
2025 | } | |
2026 | f = frag_more (1); | |
2027 | number_to_chars_bigendian (f, byte, 1); | |
2028 | return 1; | |
2029 | } | |
2030 | ||
2031 | as_fatal (_("Addressing mode not implemented yet.")); | |
2032 | return 0; | |
2033 | } | |
2034 | ||
2035 | /* Assemble the 68HC12 register mode byte. */ | |
2036 | static int | |
2037 | build_reg_mode (op, format) | |
2038 | operand *op; | |
2039 | int format; | |
2040 | { | |
2041 | unsigned char byte; | |
2042 | char *f; | |
2043 | ||
2044 | if (format & M6812_OP_SEX_MARKER | |
2045 | && op->reg1 != REG_A && op->reg1 != REG_B && op->reg1 != REG_CCR) | |
2046 | as_bad (_("Invalid source register for this instruction, use 'tfr'.")); | |
2047 | else if (op->reg1 == REG_NONE || op->reg1 == REG_PC) | |
2048 | as_bad (_("Invalid source register.")); | |
2049 | ||
2050 | if (format & M6812_OP_SEX_MARKER | |
2051 | && op->reg2 != REG_D | |
2052 | && op->reg2 != REG_X && op->reg2 != REG_Y && op->reg2 != REG_SP) | |
2053 | as_bad (_("Invalid destination register for this instruction, use 'tfr'.")); | |
2054 | else if (op->reg2 == REG_NONE || op->reg2 == REG_PC) | |
2055 | as_bad (_("Invalid destination register.")); | |
2056 | ||
2057 | byte = (op->reg1 << 4) | (op->reg2); | |
2058 | if (format & M6812_OP_EXG_MARKER) | |
2059 | byte |= 0x80; | |
2060 | ||
2061 | f = frag_more (1); | |
2062 | number_to_chars_bigendian (f, byte, 1); | |
2063 | return 1; | |
2064 | } | |
2065 | ||
2066 | /* build_insn takes a pointer to the opcode entry in the opcode table, | |
2067 | the array of operand expressions and builds the correspding instruction. | |
2068 | This operation only deals with non relative jumps insn (need special | |
2069 | handling). */ | |
2070 | static void | |
2071 | build_insn (opcode, operands, nb_operands) | |
2072 | struct m68hc11_opcode *opcode; | |
2073 | operand operands[]; | |
2074 | int nb_operands ATTRIBUTE_UNUSED; | |
2075 | { | |
2076 | int i; | |
2077 | char *f; | |
60bcf0fa NC |
2078 | long format; |
2079 | int move_insn = 0; | |
2080 | ||
2081 | /* Put the page code instruction if there is one. */ | |
2082 | format = opcode->format; | |
e371935f | 2083 | |
e371935f | 2084 | if (format & M6811_OP_BRANCH) |
c9e03e8b | 2085 | fix_new (frag_now, frag_now_fix (), 1, |
e371935f SC |
2086 | &abs_symbol, 0, 1, BFD_RELOC_M68HC11_RL_JUMP); |
2087 | ||
60bcf0fa NC |
2088 | if (format & OP_EXTENDED) |
2089 | { | |
2090 | int page_code; | |
2091 | ||
2092 | f = m68hc11_new_insn (2); | |
2093 | if (format & M6811_OP_PAGE2) | |
2094 | page_code = M6811_OPCODE_PAGE2; | |
2095 | else if (format & M6811_OP_PAGE3) | |
2096 | page_code = M6811_OPCODE_PAGE3; | |
2097 | else | |
2098 | page_code = M6811_OPCODE_PAGE4; | |
2099 | ||
2100 | number_to_chars_bigendian (f, page_code, 1); | |
2101 | f++; | |
60bcf0fa NC |
2102 | } |
2103 | else | |
2104 | f = m68hc11_new_insn (1); | |
2105 | ||
2106 | number_to_chars_bigendian (f, opcode->opcode, 1); | |
2107 | ||
2108 | i = 0; | |
2109 | ||
2110 | /* The 68HC12 movb and movw instructions are special. We have to handle | |
2111 | them in a special way. */ | |
2112 | if (format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)) | |
2113 | { | |
2114 | move_insn = 1; | |
2115 | if (format & M6812_OP_IDX) | |
2116 | { | |
986c6f4b | 2117 | build_indexed_byte (&operands[0], format, 1); |
60bcf0fa NC |
2118 | i = 1; |
2119 | format &= ~M6812_OP_IDX; | |
2120 | } | |
2121 | if (format & M6812_OP_IDX_P2) | |
2122 | { | |
986c6f4b | 2123 | build_indexed_byte (&operands[1], format, 1); |
60bcf0fa NC |
2124 | i = 0; |
2125 | format &= ~M6812_OP_IDX_P2; | |
2126 | } | |
2127 | } | |
2128 | ||
2129 | if (format & (M6811_OP_DIRECT | M6811_OP_IMM8)) | |
2130 | { | |
60bcf0fa NC |
2131 | fixup8 (&operands[i].exp, |
2132 | format & (M6811_OP_DIRECT | M6811_OP_IMM8 | M6812_OP_TRAP_ID), | |
2133 | operands[i].mode); | |
2134 | i++; | |
2135 | } | |
7bfda7eb SC |
2136 | else if (IS_CALL_SYMBOL (format) && nb_operands == 1) |
2137 | { | |
2138 | format &= ~M6812_OP_PAGE; | |
2139 | fixup24 (&operands[i].exp, format & M6811_OP_IND16, | |
2140 | operands[i].mode); | |
2141 | i++; | |
2142 | } | |
60bcf0fa NC |
2143 | else if (format & (M6811_OP_IMM16 | M6811_OP_IND16)) |
2144 | { | |
7bfda7eb SC |
2145 | fixup16 (&operands[i].exp, |
2146 | format & (M6811_OP_IMM16 | M6811_OP_IND16 | M6812_OP_PAGE), | |
60bcf0fa NC |
2147 | operands[i].mode); |
2148 | i++; | |
2149 | } | |
2150 | else if (format & (M6811_OP_IX | M6811_OP_IY)) | |
2151 | { | |
2152 | if ((format & M6811_OP_IX) && (operands[0].reg1 != REG_X)) | |
2153 | as_bad (_("Invalid indexed register, expecting register X.")); | |
2154 | if ((format & M6811_OP_IY) && (operands[0].reg1 != REG_Y)) | |
2155 | as_bad (_("Invalid indexed register, expecting register Y.")); | |
2156 | ||
60bcf0fa NC |
2157 | fixup8 (&operands[0].exp, M6811_OP_IX, operands[0].mode); |
2158 | i = 1; | |
2159 | } | |
2160 | else if (format & | |
7bfda7eb SC |
2161 | (M6812_OP_IDX | M6812_OP_IDX_2 | M6812_OP_IDX_1 |
2162 | | M6812_OP_D_IDX | M6812_OP_D_IDX_2)) | |
60bcf0fa | 2163 | { |
986c6f4b | 2164 | build_indexed_byte (&operands[i], format, move_insn); |
60bcf0fa NC |
2165 | i++; |
2166 | } | |
2167 | else if (format & M6812_OP_REG && current_architecture & cpu6812) | |
2168 | { | |
986c6f4b | 2169 | build_reg_mode (&operands[i], format); |
60bcf0fa NC |
2170 | i++; |
2171 | } | |
2172 | if (format & M6811_OP_BITMASK) | |
2173 | { | |
60bcf0fa NC |
2174 | fixup8 (&operands[i].exp, M6811_OP_BITMASK, operands[i].mode); |
2175 | i++; | |
2176 | } | |
2177 | if (format & M6811_OP_JUMP_REL) | |
2178 | { | |
60bcf0fa | 2179 | fixup8 (&operands[i].exp, M6811_OP_JUMP_REL, operands[i].mode); |
60bcf0fa NC |
2180 | } |
2181 | else if (format & M6812_OP_IND16_P2) | |
2182 | { | |
60bcf0fa NC |
2183 | fixup16 (&operands[1].exp, M6811_OP_IND16, operands[1].mode); |
2184 | } | |
7bfda7eb SC |
2185 | if (format & M6812_OP_PAGE) |
2186 | { | |
2187 | fixup8 (&operands[i].exp, M6812_OP_PAGE, operands[i].mode); | |
2188 | } | |
60bcf0fa | 2189 | } |
60bcf0fa NC |
2190 | \f |
2191 | /* Opcode identification and operand analysis. */ | |
2192 | ||
2193 | /* find() gets a pointer to an entry in the opcode table. It must look at all | |
2194 | opcodes with the same name and use the operands to choose the correct | |
2195 | opcode. Returns the opcode pointer if there was a match and 0 if none. */ | |
2196 | static struct m68hc11_opcode * | |
2197 | find (opc, operands, nb_operands) | |
2198 | struct m68hc11_opcode_def *opc; | |
2199 | operand operands[]; | |
2200 | int nb_operands; | |
2201 | { | |
2202 | int i, match, pos; | |
2203 | struct m68hc11_opcode *opcode; | |
2204 | struct m68hc11_opcode *op_indirect; | |
2205 | ||
2206 | op_indirect = 0; | |
2207 | opcode = opc->opcode; | |
2208 | ||
2209 | /* Now search the opcode table table for one with operands | |
2210 | that matches what we've got. We're only done if the operands matched so | |
2211 | far AND there are no more to check. */ | |
2212 | for (pos = match = 0; match == 0 && pos < opc->nb_modes; pos++, opcode++) | |
2213 | { | |
2214 | int poss_indirect = 0; | |
2215 | long format = opcode->format; | |
2216 | int expect; | |
2217 | ||
2218 | expect = 0; | |
2219 | if (opcode->format & M6811_OP_MASK) | |
2220 | expect++; | |
2221 | if (opcode->format & M6811_OP_BITMASK) | |
2222 | expect++; | |
2223 | if (opcode->format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2224 | expect++; | |
2225 | if (opcode->format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2)) | |
2226 | expect++; | |
7bfda7eb SC |
2227 | if ((opcode->format & M6812_OP_PAGE) |
2228 | && (!IS_CALL_SYMBOL (opcode->format) || nb_operands == 2)) | |
2229 | expect++; | |
60bcf0fa NC |
2230 | |
2231 | for (i = 0; expect == nb_operands && i < nb_operands; i++) | |
2232 | { | |
2233 | int mode = operands[i].mode; | |
2234 | ||
2235 | if (mode & M6811_OP_IMM16) | |
2236 | { | |
2237 | if (format & | |
2238 | (M6811_OP_IMM8 | M6811_OP_IMM16 | M6811_OP_BITMASK)) | |
2239 | continue; | |
2240 | break; | |
2241 | } | |
2242 | if (mode == M6811_OP_DIRECT) | |
2243 | { | |
2244 | if (format & M6811_OP_DIRECT) | |
2245 | continue; | |
2246 | ||
2247 | /* If the operand is a page 0 operand, remember a | |
2248 | possible <abs-16> addressing mode. We mark | |
2249 | this and continue to check other operands. */ | |
2250 | if (format & M6811_OP_IND16 | |
2251 | && flag_strict_direct_addressing && op_indirect == 0) | |
2252 | { | |
2253 | poss_indirect = 1; | |
2254 | continue; | |
2255 | } | |
2256 | break; | |
2257 | } | |
2258 | if (mode & M6811_OP_IND16) | |
2259 | { | |
2260 | if (i == 0 && (format & M6811_OP_IND16) != 0) | |
2261 | continue; | |
7bfda7eb SC |
2262 | if (i != 0 && (format & M6812_OP_PAGE) != 0) |
2263 | continue; | |
60bcf0fa NC |
2264 | if (i != 0 && (format & M6812_OP_IND16_P2) != 0) |
2265 | continue; | |
2266 | if (i == 0 && (format & M6811_OP_BITMASK)) | |
2267 | break; | |
2268 | } | |
2269 | if (mode & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2270 | { | |
2271 | if (format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2272 | continue; | |
2273 | } | |
2274 | if (mode & M6812_OP_REG) | |
2275 | { | |
df86943d NC |
2276 | if (i == 0 |
2277 | && (format & M6812_OP_REG) | |
2278 | && (operands[i].reg2 == REG_NONE)) | |
60bcf0fa | 2279 | continue; |
df86943d NC |
2280 | if (i == 0 |
2281 | && (format & M6812_OP_REG) | |
2282 | && (format & M6812_OP_REG_2) | |
2283 | && (operands[i].reg2 != REG_NONE)) | |
60bcf0fa | 2284 | continue; |
df86943d NC |
2285 | if (i == 0 |
2286 | && (format & M6812_OP_IDX) | |
2287 | && (operands[i].reg2 != REG_NONE)) | |
2288 | continue; | |
df86943d NC |
2289 | if (i == 0 |
2290 | && (format & M6812_OP_IDX) | |
60bcf0fa NC |
2291 | && (format & (M6812_OP_IND16_P2 | M6812_OP_IDX_P2))) |
2292 | continue; | |
df86943d NC |
2293 | if (i == 1 |
2294 | && (format & M6812_OP_IDX_P2)) | |
60bcf0fa NC |
2295 | continue; |
2296 | break; | |
2297 | } | |
2298 | if (mode & M6812_OP_IDX) | |
2299 | { | |
2300 | if (format & M6811_OP_IX && operands[i].reg1 == REG_X) | |
2301 | continue; | |
2302 | if (format & M6811_OP_IY && operands[i].reg1 == REG_Y) | |
2303 | continue; | |
2304 | if (i == 0 | |
2305 | && format & (M6812_OP_IDX | M6812_OP_IDX_1 | M6812_OP_IDX_2) | |
2306 | && (operands[i].reg1 == REG_X | |
2307 | || operands[i].reg1 == REG_Y | |
2308 | || operands[i].reg1 == REG_SP | |
2309 | || operands[i].reg1 == REG_PC)) | |
2310 | continue; | |
2311 | if (i == 1 && format & M6812_OP_IDX_P2) | |
2312 | continue; | |
2313 | } | |
7bfda7eb SC |
2314 | if (mode & format & (M6812_OP_D_IDX | M6812_OP_D_IDX_2)) |
2315 | { | |
2316 | if (i == 0) | |
2317 | continue; | |
2318 | } | |
60bcf0fa NC |
2319 | if (mode & M6812_AUTO_INC_DEC) |
2320 | { | |
2321 | if (i == 0 | |
2322 | && format & (M6812_OP_IDX | M6812_OP_IDX_1 | | |
2323 | M6812_OP_IDX_2)) | |
2324 | continue; | |
2325 | if (i == 1 && format & M6812_OP_IDX_P2) | |
2326 | continue; | |
2327 | } | |
2328 | break; | |
2329 | } | |
2330 | match = i == nb_operands; | |
2331 | ||
2332 | /* Operands are ok but an operand uses page 0 addressing mode | |
2333 | while the insn supports abs-16 mode. Keep a reference to this | |
2334 | insns in case there is no insn supporting page 0 addressing. */ | |
2335 | if (match && poss_indirect) | |
2336 | { | |
2337 | op_indirect = opcode; | |
2338 | match = 0; | |
2339 | } | |
2340 | if (match) | |
2341 | break; | |
2342 | } | |
2343 | ||
2344 | /* Page 0 addressing is used but not supported by any insn. | |
2345 | If absolute addresses are supported, we use that insn. */ | |
2346 | if (match == 0 && op_indirect) | |
2347 | { | |
2348 | opcode = op_indirect; | |
2349 | match = 1; | |
2350 | } | |
2351 | ||
2352 | if (!match) | |
2353 | { | |
2354 | return (0); | |
2355 | } | |
2356 | ||
2357 | return opcode; | |
2358 | } | |
2359 | ||
60bcf0fa NC |
2360 | /* Find the real opcode and its associated operands. We use a progressive |
2361 | approach here. On entry, 'opc' points to the first opcode in the | |
2362 | table that matches the opcode name in the source line. We try to | |
2363 | isolate an operand, find a possible match in the opcode table. | |
2364 | We isolate another operand if no match were found. The table 'operands' | |
2365 | is filled while operands are recognized. | |
2366 | ||
2367 | Returns the opcode pointer that matches the opcode name in the | |
2368 | source line and the associated operands. */ | |
2369 | static struct m68hc11_opcode * | |
2370 | find_opcode (opc, operands, nb_operands) | |
2371 | struct m68hc11_opcode_def *opc; | |
2372 | operand operands[]; | |
2373 | int *nb_operands; | |
2374 | { | |
2375 | struct m68hc11_opcode *opcode; | |
2376 | int i; | |
2377 | ||
2378 | if (opc->max_operands == 0) | |
2379 | { | |
2380 | *nb_operands = 0; | |
2381 | return opc->opcode; | |
2382 | } | |
2383 | ||
2384 | for (i = 0; i < opc->max_operands;) | |
2385 | { | |
2386 | int result; | |
2387 | ||
2388 | result = get_operand (&operands[i], i, opc->format); | |
2389 | if (result <= 0) | |
fafb6d17 | 2390 | return 0; |
60bcf0fa NC |
2391 | |
2392 | /* Special case where the bitmask of the bclr/brclr | |
2393 | instructions is not introduced by #. | |
2394 | Example: bclr 3,x $80. */ | |
2395 | if (i == 1 && (opc->format & M6811_OP_BITMASK) | |
2396 | && (operands[i].mode & M6811_OP_IND16)) | |
2397 | { | |
2398 | operands[i].mode = M6811_OP_IMM16; | |
2399 | } | |
2400 | ||
2401 | i += result; | |
2402 | *nb_operands = i; | |
2403 | if (i >= opc->min_operands) | |
2404 | { | |
2405 | opcode = find (opc, operands, i); | |
7bfda7eb SC |
2406 | if (opcode && !(opcode->format & M6812_OP_PAGE)) |
2407 | return opcode; | |
2408 | ||
2409 | if (opcode && *input_line_pointer != ',') | |
fafb6d17 | 2410 | return opcode; |
60bcf0fa NC |
2411 | } |
2412 | ||
2413 | if (*input_line_pointer == ',') | |
2414 | input_line_pointer++; | |
2415 | } | |
82efde3a | 2416 | |
60bcf0fa NC |
2417 | return 0; |
2418 | } | |
2419 | ||
2420 | #define M6812_XBCC_MARKER (M6812_OP_TBCC_MARKER \ | |
2421 | | M6812_OP_DBCC_MARKER \ | |
2422 | | M6812_OP_IBCC_MARKER) | |
60bcf0fa NC |
2423 | \f |
2424 | /* Gas line assembler entry point. */ | |
2425 | ||
2426 | /* This is the main entry point for the machine-dependent assembler. str | |
2427 | points to a machine-dependent instruction. This function is supposed to | |
2428 | emit the frags/bytes it assembles to. */ | |
2429 | void | |
2430 | md_assemble (str) | |
2431 | char *str; | |
2432 | { | |
2433 | struct m68hc11_opcode_def *opc; | |
2434 | struct m68hc11_opcode *opcode; | |
2435 | ||
2436 | unsigned char *op_start, *save; | |
2437 | unsigned char *op_end; | |
2438 | char name[20]; | |
2439 | int nlen = 0; | |
2440 | operand operands[M6811_MAX_OPERANDS]; | |
2441 | int nb_operands; | |
2442 | int branch_optimize = 0; | |
2443 | int alias_id = -1; | |
2444 | ||
fafb6d17 | 2445 | /* Drop leading whitespace. */ |
60bcf0fa NC |
2446 | while (*str == ' ') |
2447 | str++; | |
2448 | ||
2449 | /* Find the opcode end and get the opcode in 'name'. The opcode is forced | |
2450 | lower case (the opcode table only has lower case op-codes). */ | |
2451 | for (op_start = op_end = (unsigned char *) (str); | |
2452 | *op_end && nlen < 20 && !is_end_of_line[*op_end] && *op_end != ' '; | |
2453 | op_end++) | |
2454 | { | |
3882b010 | 2455 | name[nlen] = TOLOWER (op_start[nlen]); |
60bcf0fa NC |
2456 | nlen++; |
2457 | } | |
2458 | name[nlen] = 0; | |
2459 | ||
2460 | if (nlen == 0) | |
2461 | { | |
2462 | as_bad (_("No instruction or missing opcode.")); | |
2463 | return; | |
2464 | } | |
2465 | ||
2466 | /* Find the opcode definition given its name. */ | |
2467 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, name); | |
2468 | ||
2469 | /* If it's not recognized, look for 'jbsr' and 'jbxx'. These are | |
2470 | pseudo insns for relative branch. For these branchs, we always | |
2471 | optimize them (turned into absolute branchs) even if --short-branchs | |
2472 | is given. */ | |
2473 | if (opc == NULL && name[0] == 'j' && name[1] == 'b') | |
2474 | { | |
2475 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, &name[1]); | |
2476 | if (opc | |
2477 | && (!(opc->format & M6811_OP_JUMP_REL) | |
2478 | || (opc->format & M6811_OP_BITMASK))) | |
2479 | opc = 0; | |
2480 | if (opc) | |
2481 | branch_optimize = 1; | |
2482 | } | |
2483 | ||
2484 | /* The following test should probably be removed. This is not conform | |
2485 | to Motorola assembler specs. */ | |
2486 | if (opc == NULL && flag_mri) | |
2487 | { | |
2488 | if (*op_end == ' ' || *op_end == '\t') | |
2489 | { | |
2490 | while (*op_end == ' ' || *op_end == '\t') | |
2491 | op_end++; | |
2492 | ||
2493 | if (nlen < 19 | |
2494 | && (*op_end && | |
2495 | (is_end_of_line[op_end[1]] | |
2496 | || op_end[1] == ' ' || op_end[1] == '\t' | |
3882b010 | 2497 | || !ISALNUM (op_end[1]))) |
60bcf0fa NC |
2498 | && (*op_end == 'a' || *op_end == 'b' |
2499 | || *op_end == 'A' || *op_end == 'B' | |
2500 | || *op_end == 'd' || *op_end == 'D' | |
2501 | || *op_end == 'x' || *op_end == 'X' | |
2502 | || *op_end == 'y' || *op_end == 'Y')) | |
2503 | { | |
3882b010 | 2504 | name[nlen++] = TOLOWER (*op_end++); |
60bcf0fa NC |
2505 | name[nlen] = 0; |
2506 | opc = (struct m68hc11_opcode_def *) hash_find (m68hc11_hash, | |
2507 | name); | |
2508 | } | |
2509 | } | |
2510 | } | |
2511 | ||
2512 | /* Identify a possible instruction alias. There are some on the | |
986c6f4b | 2513 | 68HC12 to emulate a few 68HC11 instructions. */ |
60bcf0fa NC |
2514 | if (opc == NULL && (current_architecture & cpu6812)) |
2515 | { | |
2516 | int i; | |
2517 | ||
2518 | for (i = 0; i < m68hc12_num_alias; i++) | |
2519 | if (strcmp (m68hc12_alias[i].name, name) == 0) | |
2520 | { | |
2521 | alias_id = i; | |
2522 | break; | |
2523 | } | |
2524 | } | |
2525 | if (opc == NULL && alias_id < 0) | |
2526 | { | |
2527 | as_bad (_("Opcode `%s' is not recognized."), name); | |
2528 | return; | |
2529 | } | |
2530 | save = input_line_pointer; | |
2531 | input_line_pointer = op_end; | |
2532 | ||
2533 | if (opc) | |
2534 | { | |
2535 | opc->used++; | |
2536 | opcode = find_opcode (opc, operands, &nb_operands); | |
2537 | } | |
2538 | else | |
2539 | opcode = 0; | |
2540 | ||
2541 | if ((opcode || alias_id >= 0) && !flag_mri) | |
2542 | { | |
2543 | char *p = input_line_pointer; | |
2544 | ||
2545 | while (*p == ' ' || *p == '\t' || *p == '\n' || *p == '\r') | |
2546 | p++; | |
2547 | ||
2548 | if (*p != '\n' && *p) | |
2549 | as_bad (_("Garbage at end of instruction: `%s'."), p); | |
2550 | } | |
2551 | ||
2552 | input_line_pointer = save; | |
2553 | ||
2554 | if (alias_id >= 0) | |
2555 | { | |
2556 | char *f = m68hc11_new_insn (m68hc12_alias[alias_id].size); | |
fafb6d17 | 2557 | |
60bcf0fa NC |
2558 | number_to_chars_bigendian (f, m68hc12_alias[alias_id].code1, 1); |
2559 | if (m68hc12_alias[alias_id].size > 1) | |
2560 | number_to_chars_bigendian (f + 1, m68hc12_alias[alias_id].code2, 1); | |
2561 | ||
2562 | return; | |
2563 | } | |
2564 | ||
2565 | /* Opcode is known but does not have valid operands. Print out the | |
2566 | syntax for this opcode. */ | |
2567 | if (opcode == 0) | |
2568 | { | |
2569 | if (flag_print_insn_syntax) | |
2570 | print_insn_format (name); | |
2571 | ||
2572 | as_bad (_("Invalid operand for `%s'"), name); | |
2573 | return; | |
2574 | } | |
2575 | ||
2576 | /* Treat dbeq/ibeq/tbeq instructions in a special way. The branch is | |
2577 | relative and must be in the range -256..255 (9-bits). */ | |
2578 | if ((opcode->format & M6812_XBCC_MARKER) | |
2579 | && (opcode->format & M6811_OP_JUMP_REL)) | |
27302d63 | 2580 | build_dbranch_insn (opcode, operands, nb_operands, branch_optimize); |
60bcf0fa NC |
2581 | |
2582 | /* Relative jumps instructions are taken care of separately. We have to make | |
2583 | sure that the relative branch is within the range -128..127. If it's out | |
2584 | of range, the instructions are changed into absolute instructions. | |
2585 | This is not supported for the brset and brclr instructions. */ | |
2586 | else if ((opcode->format & (M6811_OP_JUMP_REL | M6812_OP_JUMP_REL16)) | |
2587 | && !(opcode->format & M6811_OP_BITMASK)) | |
2588 | build_jump_insn (opcode, operands, nb_operands, branch_optimize); | |
2589 | else | |
2590 | build_insn (opcode, operands, nb_operands); | |
2591 | } | |
eb086b59 SC |
2592 | |
2593 | \f | |
2594 | /* Pseudo op to control the ELF flags. */ | |
2595 | static void | |
2596 | s_m68hc11_mode (x) | |
2597 | int x ATTRIBUTE_UNUSED; | |
2598 | { | |
2599 | char *name = input_line_pointer, ch; | |
2600 | ||
2601 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
2602 | input_line_pointer++; | |
2603 | ch = *input_line_pointer; | |
2604 | *input_line_pointer = '\0'; | |
2605 | ||
2606 | if (strcmp (name, "mshort") == 0) | |
2607 | { | |
2608 | elf_flags &= ~E_M68HC11_I32; | |
2609 | } | |
2610 | else if (strcmp (name, "mlong") == 0) | |
2611 | { | |
2612 | elf_flags |= E_M68HC11_I32; | |
2613 | } | |
2614 | else if (strcmp (name, "mshort-double") == 0) | |
2615 | { | |
2616 | elf_flags &= ~E_M68HC11_F64; | |
2617 | } | |
2618 | else if (strcmp (name, "mlong-double") == 0) | |
2619 | { | |
2620 | elf_flags |= E_M68HC11_F64; | |
2621 | } | |
2622 | else | |
2623 | { | |
2624 | as_warn (_("Invalid mode: %s\n"), name); | |
2625 | } | |
2626 | *input_line_pointer = ch; | |
2627 | demand_empty_rest_of_line (); | |
2628 | } | |
2629 | ||
2630 | /* Mark the symbols with STO_M68HC12_FAR to indicate the functions | |
2631 | are using 'rtc' for returning. It is necessary to use 'call' | |
2632 | to invoke them. This is also used by the debugger to correctly | |
2633 | find the stack frame. */ | |
2634 | static void | |
2635 | s_m68hc11_mark_symbol (mark) | |
2636 | int mark; | |
2637 | { | |
2638 | char *name; | |
2639 | int c; | |
2640 | symbolS *symbolP; | |
2641 | asymbol *bfdsym; | |
2642 | elf_symbol_type *elfsym; | |
2643 | ||
2644 | do | |
2645 | { | |
2646 | name = input_line_pointer; | |
2647 | c = get_symbol_end (); | |
2648 | symbolP = symbol_find_or_make (name); | |
2649 | *input_line_pointer = c; | |
2650 | ||
2651 | SKIP_WHITESPACE (); | |
2652 | ||
2653 | bfdsym = symbol_get_bfdsym (symbolP); | |
2654 | elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym); | |
2655 | ||
2656 | assert (elfsym); | |
2657 | ||
2658 | /* Mark the symbol far (using rtc for function return). */ | |
2659 | elfsym->internal_elf_sym.st_other |= mark; | |
2660 | ||
2661 | if (c == ',') | |
2662 | { | |
2663 | input_line_pointer ++; | |
2664 | ||
2665 | SKIP_WHITESPACE (); | |
2666 | ||
2667 | if (*input_line_pointer == '\n') | |
2668 | c = '\n'; | |
2669 | } | |
2670 | } | |
2671 | while (c == ','); | |
2672 | ||
2673 | demand_empty_rest_of_line (); | |
2674 | } | |
e371935f SC |
2675 | |
2676 | static void | |
2677 | s_m68hc11_relax (ignore) | |
2678 | int ignore ATTRIBUTE_UNUSED; | |
2679 | { | |
2680 | expressionS ex; | |
2681 | ||
2682 | expression (&ex); | |
2683 | ||
2684 | if (ex.X_op != O_symbol || ex.X_add_number != 0) | |
2685 | { | |
2686 | as_bad (_("bad .relax format")); | |
2687 | ignore_rest_of_line (); | |
2688 | return; | |
2689 | } | |
2690 | ||
2691 | fix_new_exp (frag_now, frag_now_fix (), 1, &ex, 1, | |
2692 | BFD_RELOC_M68HC11_RL_GROUP); | |
2693 | ||
2694 | demand_empty_rest_of_line (); | |
2695 | } | |
2696 | ||
60bcf0fa NC |
2697 | \f |
2698 | /* Relocation, relaxation and frag conversions. */ | |
e371935f SC |
2699 | |
2700 | /* PC-relative offsets are relative to the start of the | |
2701 | next instruction. That is, the address of the offset, plus its | |
2702 | size, since the offset is always the last part of the insn. */ | |
60bcf0fa | 2703 | long |
e371935f SC |
2704 | md_pcrel_from (fixP) |
2705 | fixS *fixP; | |
60bcf0fa | 2706 | { |
e371935f | 2707 | if (fixP->fx_r_type == BFD_RELOC_M68HC11_RL_JUMP) |
60bcf0fa NC |
2708 | return 0; |
2709 | ||
e371935f | 2710 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; |
60bcf0fa NC |
2711 | } |
2712 | ||
2713 | /* If while processing a fixup, a reloc really needs to be created | |
2714 | then it is done here. */ | |
2715 | arelent * | |
2716 | tc_gen_reloc (section, fixp) | |
1910266d | 2717 | asection *section ATTRIBUTE_UNUSED; |
60bcf0fa NC |
2718 | fixS *fixp; |
2719 | { | |
2720 | arelent *reloc; | |
2721 | ||
2722 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
2723 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
2724 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
2725 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2726 | if (fixp->fx_r_type == 0) | |
2727 | reloc->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_16); | |
2728 | else | |
2729 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2730 | if (reloc->howto == (reloc_howto_type *) NULL) | |
2731 | { | |
2732 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2733 | _("Relocation %d is not supported by object file format."), | |
2734 | (int) fixp->fx_r_type); | |
2735 | return NULL; | |
2736 | } | |
2737 | ||
a161fe53 AM |
2738 | /* Since we use Rel instead of Rela, encode the vtable entry to be |
2739 | used in the relocation's section offset. */ | |
2740 | if (fixp->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
2741 | reloc->address = fixp->fx_offset; | |
2742 | ||
2743 | reloc->addend = 0; | |
60bcf0fa NC |
2744 | return reloc; |
2745 | } | |
2746 | ||
c9e03e8b SC |
2747 | /* We need a port-specific relaxation function to cope with sym2 - sym1 |
2748 | relative expressions with both symbols in the same segment (but not | |
2749 | necessarily in the same frag as this insn), for example: | |
2750 | ldab sym2-(sym1-2),pc | |
2751 | sym1: | |
2752 | The offset can be 5, 9 or 16 bits long. */ | |
2753 | ||
2754 | long | |
2755 | m68hc11_relax_frag (seg, fragP, stretch) | |
2756 | segT seg ATTRIBUTE_UNUSED; | |
2757 | fragS *fragP; | |
2758 | long stretch ATTRIBUTE_UNUSED; | |
2759 | { | |
2760 | long growth; | |
2761 | offsetT aim = 0; | |
2762 | symbolS *symbolP; | |
2763 | const relax_typeS *this_type; | |
2764 | const relax_typeS *start_type; | |
2765 | relax_substateT next_state; | |
2766 | relax_substateT this_state; | |
2767 | const relax_typeS *table = TC_GENERIC_RELAX_TABLE; | |
2768 | ||
2769 | /* We only have to cope with frags as prepared by | |
2770 | md_estimate_size_before_relax. The STATE_BITS16 case may geet here | |
2771 | because of the different reasons that it's not relaxable. */ | |
2772 | switch (fragP->fr_subtype) | |
2773 | { | |
75538612 | 2774 | case ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS16): |
c9e03e8b SC |
2775 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS16): |
2776 | /* When we get to this state, the frag won't grow any more. */ | |
2777 | return 0; | |
2778 | ||
75538612 | 2779 | case ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS5): |
c9e03e8b | 2780 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS5): |
75538612 | 2781 | case ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS9): |
c9e03e8b SC |
2782 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS9): |
2783 | if (fragP->fr_symbol == NULL | |
2784 | || S_GET_SEGMENT (fragP->fr_symbol) != absolute_section) | |
2785 | as_fatal (_("internal inconsistency problem in %s: fr_symbol %lx"), | |
2786 | __FUNCTION__, (long) fragP->fr_symbol); | |
2787 | symbolP = fragP->fr_symbol; | |
2788 | if (symbol_resolved_p (symbolP)) | |
2789 | as_fatal (_("internal inconsistency problem in %s: resolved symbol"), | |
2790 | __FUNCTION__); | |
2791 | aim = S_GET_VALUE (symbolP); | |
2792 | break; | |
2793 | ||
2794 | default: | |
2795 | as_fatal (_("internal inconsistency problem in %s: fr_subtype %d"), | |
2796 | __FUNCTION__, fragP->fr_subtype); | |
2797 | } | |
2798 | ||
2799 | /* The rest is stolen from relax_frag. There's no obvious way to | |
2800 | share the code, but fortunately no requirement to keep in sync as | |
2801 | long as fragP->fr_symbol does not have its segment changed. */ | |
2802 | ||
2803 | this_state = fragP->fr_subtype; | |
2804 | start_type = this_type = table + this_state; | |
2805 | ||
2806 | if (aim < 0) | |
2807 | { | |
2808 | /* Look backwards. */ | |
2809 | for (next_state = this_type->rlx_more; next_state;) | |
2810 | if (aim >= this_type->rlx_backward) | |
2811 | next_state = 0; | |
2812 | else | |
2813 | { | |
2814 | /* Grow to next state. */ | |
2815 | this_state = next_state; | |
2816 | this_type = table + this_state; | |
2817 | next_state = this_type->rlx_more; | |
2818 | } | |
2819 | } | |
2820 | else | |
2821 | { | |
2822 | /* Look forwards. */ | |
2823 | for (next_state = this_type->rlx_more; next_state;) | |
2824 | if (aim <= this_type->rlx_forward) | |
2825 | next_state = 0; | |
2826 | else | |
2827 | { | |
2828 | /* Grow to next state. */ | |
2829 | this_state = next_state; | |
2830 | this_type = table + this_state; | |
2831 | next_state = this_type->rlx_more; | |
2832 | } | |
2833 | } | |
2834 | ||
2835 | growth = this_type->rlx_length - start_type->rlx_length; | |
2836 | if (growth != 0) | |
2837 | fragP->fr_subtype = this_state; | |
2838 | return growth; | |
2839 | } | |
2840 | ||
60bcf0fa NC |
2841 | void |
2842 | md_convert_frag (abfd, sec, fragP) | |
2843 | bfd *abfd ATTRIBUTE_UNUSED; | |
2844 | asection *sec ATTRIBUTE_UNUSED; | |
2845 | fragS *fragP; | |
2846 | { | |
2847 | fixS *fixp; | |
88051039 | 2848 | long value; |
60bcf0fa NC |
2849 | long disp; |
2850 | char *buffer_address = fragP->fr_literal; | |
2851 | ||
2852 | /* Address in object code of the displacement. */ | |
2853 | register int object_address = fragP->fr_fix + fragP->fr_address; | |
2854 | ||
2855 | buffer_address += fragP->fr_fix; | |
2856 | ||
2857 | /* The displacement of the address, from current location. */ | |
ac62c346 | 2858 | value = S_GET_VALUE (fragP->fr_symbol); |
88051039 | 2859 | disp = (value + fragP->fr_offset) - object_address; |
60bcf0fa NC |
2860 | |
2861 | switch (fragP->fr_subtype) | |
2862 | { | |
2863 | case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_BYTE): | |
2864 | fragP->fr_opcode[1] = disp; | |
2865 | break; | |
2866 | ||
2867 | case ENCODE_RELAX (STATE_PC_RELATIVE, STATE_WORD): | |
2868 | /* This relax is only for bsr and bra. */ | |
2869 | assert (IS_OPCODE (fragP->fr_opcode[0], M6811_BSR) | |
2870 | || IS_OPCODE (fragP->fr_opcode[0], M6811_BRA) | |
2871 | || IS_OPCODE (fragP->fr_opcode[0], M6812_BSR)); | |
2872 | ||
2873 | fragP->fr_opcode[0] = convert_branch (fragP->fr_opcode[0]); | |
2874 | ||
2875 | fix_new (fragP, fragP->fr_fix - 1, 2, | |
2876 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2877 | fragP->fr_fix += 1; | |
2878 | break; | |
2879 | ||
2880 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_BYTE): | |
2881 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_BYTE): | |
2882 | fragP->fr_opcode[1] = disp; | |
2883 | break; | |
2884 | ||
2885 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, STATE_WORD): | |
2886 | /* Invert branch. */ | |
2887 | fragP->fr_opcode[0] ^= 1; | |
fafb6d17 | 2888 | fragP->fr_opcode[1] = 3; /* Branch offset. */ |
60bcf0fa NC |
2889 | buffer_address[0] = M6811_JMP; |
2890 | fix_new (fragP, fragP->fr_fix + 1, 2, | |
2891 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2892 | fragP->fr_fix += 3; | |
2893 | break; | |
2894 | ||
2895 | case ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, STATE_WORD): | |
2896 | /* Translate branch into a long branch. */ | |
2897 | fragP->fr_opcode[1] = fragP->fr_opcode[0]; | |
2898 | fragP->fr_opcode[0] = M6811_OPCODE_PAGE2; | |
2899 | ||
2900 | fixp = fix_new (fragP, fragP->fr_fix, 2, | |
2901 | fragP->fr_symbol, fragP->fr_offset, 1, | |
2902 | BFD_RELOC_16_PCREL); | |
2903 | fixp->fx_pcrel_adjust = 2; | |
2904 | fragP->fr_fix += 2; | |
2905 | break; | |
2906 | ||
75538612 SC |
2907 | case ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS5): |
2908 | if (fragP->fr_symbol != 0 | |
c9e03e8b SC |
2909 | && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section) |
2910 | value = disp; | |
75538612 SC |
2911 | /* fall through */ |
2912 | ||
2913 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS5): | |
88051039 | 2914 | fragP->fr_opcode[0] = fragP->fr_opcode[0] << 6; |
c9e03e8b | 2915 | fragP->fr_opcode[0] |= value & 0x1f; |
60bcf0fa NC |
2916 | break; |
2917 | ||
75538612 SC |
2918 | case ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS9): |
2919 | /* For a PC-relative offset, use the displacement with a -1 correction | |
2920 | to take into account the additional byte of the insn. */ | |
2921 | if (fragP->fr_symbol != 0 | |
c9e03e8b | 2922 | && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section) |
75538612 SC |
2923 | value = disp - 1; |
2924 | /* fall through */ | |
2925 | ||
2926 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS9): | |
60bcf0fa NC |
2927 | fragP->fr_opcode[0] = (fragP->fr_opcode[0] << 3); |
2928 | fragP->fr_opcode[0] |= 0xE0; | |
c9e03e8b SC |
2929 | fragP->fr_opcode[0] |= (value >> 8) & 1; |
2930 | fragP->fr_opcode[1] = value; | |
60bcf0fa NC |
2931 | fragP->fr_fix += 1; |
2932 | break; | |
2933 | ||
75538612 | 2934 | case ENCODE_RELAX (STATE_INDEXED_PCREL, STATE_BITS16): |
60bcf0fa NC |
2935 | case ENCODE_RELAX (STATE_INDEXED_OFFSET, STATE_BITS16): |
2936 | fragP->fr_opcode[0] = (fragP->fr_opcode[0] << 3); | |
88051039 | 2937 | fragP->fr_opcode[0] |= 0xe2; |
c9e03e8b SC |
2938 | if ((fragP->fr_opcode[0] & 0x0ff) == 0x0fa |
2939 | && fragP->fr_symbol != 0 | |
2940 | && S_GET_SEGMENT (fragP->fr_symbol) != absolute_section) | |
098f2ec3 KH |
2941 | { |
2942 | fixp = fix_new (fragP, fragP->fr_fix, 2, | |
2943 | fragP->fr_symbol, fragP->fr_offset, | |
2944 | 1, BFD_RELOC_16_PCREL); | |
098f2ec3 | 2945 | } |
88051039 | 2946 | else |
098f2ec3 KH |
2947 | { |
2948 | fix_new (fragP, fragP->fr_fix, 2, | |
2949 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2950 | } | |
88051039 | 2951 | fragP->fr_fix += 2; |
60bcf0fa NC |
2952 | break; |
2953 | ||
2954 | case ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_BYTE): | |
2955 | if (disp < 0) | |
2956 | fragP->fr_opcode[0] |= 0x10; | |
2957 | ||
2958 | fragP->fr_opcode[1] = disp & 0x0FF; | |
2959 | break; | |
2960 | ||
2961 | case ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_WORD): | |
2962 | /* Invert branch. */ | |
2963 | fragP->fr_opcode[0] ^= 0x20; | |
2964 | fragP->fr_opcode[1] = 3; /* Branch offset. */ | |
2965 | buffer_address[0] = M6812_JMP; | |
2966 | fix_new (fragP, fragP->fr_fix + 1, 2, | |
2967 | fragP->fr_symbol, fragP->fr_offset, 0, BFD_RELOC_16); | |
2968 | fragP->fr_fix += 3; | |
2969 | break; | |
2970 | ||
2971 | default: | |
2972 | break; | |
2973 | } | |
2974 | } | |
2975 | ||
dbb8ad49 SC |
2976 | /* On an ELF system, we can't relax a weak symbol. The weak symbol |
2977 | can be overridden at final link time by a non weak symbol. We can | |
2978 | relax externally visible symbol because there is no shared library | |
2979 | and such symbol can't be overridden (unless they are weak). */ | |
d8273f3b SC |
2980 | static int |
2981 | relaxable_symbol (symbol) | |
098f2ec3 | 2982 | symbolS *symbol; |
d8273f3b | 2983 | { |
dbb8ad49 | 2984 | return ! S_IS_WEAK (symbol); |
d8273f3b SC |
2985 | } |
2986 | ||
60bcf0fa NC |
2987 | /* Force truly undefined symbols to their maximum size, and generally set up |
2988 | the frag list to be relaxed. */ | |
2989 | int | |
2990 | md_estimate_size_before_relax (fragP, segment) | |
2991 | fragS *fragP; | |
2992 | asection *segment; | |
2993 | { | |
606ab118 AM |
2994 | if (RELAX_LENGTH (fragP->fr_subtype) == STATE_UNDF) |
2995 | { | |
2996 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment | |
2997 | || !relaxable_symbol (fragP->fr_symbol)) | |
2998 | { | |
2999 | /* Non-relaxable cases. */ | |
3000 | int old_fr_fix; | |
3001 | char *buffer_address; | |
60bcf0fa | 3002 | |
606ab118 AM |
3003 | old_fr_fix = fragP->fr_fix; |
3004 | buffer_address = fragP->fr_fix + fragP->fr_literal; | |
60bcf0fa | 3005 | |
606ab118 AM |
3006 | switch (RELAX_STATE (fragP->fr_subtype)) |
3007 | { | |
3008 | case STATE_PC_RELATIVE: | |
3009 | ||
3010 | /* This relax is only for bsr and bra. */ | |
3011 | assert (IS_OPCODE (fragP->fr_opcode[0], M6811_BSR) | |
3012 | || IS_OPCODE (fragP->fr_opcode[0], M6811_BRA) | |
3013 | || IS_OPCODE (fragP->fr_opcode[0], M6812_BSR)); | |
3014 | ||
3015 | if (flag_fixed_branchs) | |
3016 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
3017 | _("bra or bsr with undefined symbol.")); | |
3018 | ||
3019 | /* The symbol is undefined or in a separate section. | |
3020 | Turn bra into a jmp and bsr into a jsr. The insn | |
3021 | becomes 3 bytes long (instead of 2). A fixup is | |
3022 | necessary for the unresolved symbol address. */ | |
3023 | fragP->fr_opcode[0] = convert_branch (fragP->fr_opcode[0]); | |
3024 | ||
13283e2d | 3025 | fix_new (fragP, fragP->fr_fix - 1, 2, fragP->fr_symbol, |
606ab118 | 3026 | fragP->fr_offset, 0, BFD_RELOC_16); |
13283e2d | 3027 | fragP->fr_fix++; |
606ab118 | 3028 | break; |
60bcf0fa | 3029 | |
606ab118 AM |
3030 | case STATE_CONDITIONAL_BRANCH: |
3031 | assert (current_architecture & cpu6811); | |
60bcf0fa | 3032 | |
606ab118 AM |
3033 | fragP->fr_opcode[0] ^= 1; /* Reverse sense of branch. */ |
3034 | fragP->fr_opcode[1] = 3; /* Skip next jmp insn (3 bytes). */ | |
60bcf0fa | 3035 | |
606ab118 AM |
3036 | /* Don't use fr_opcode[2] because this may be |
3037 | in a different frag. */ | |
3038 | buffer_address[0] = M6811_JMP; | |
60bcf0fa | 3039 | |
606ab118 AM |
3040 | fragP->fr_fix++; |
3041 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
3042 | fragP->fr_offset, 0, BFD_RELOC_16); | |
3043 | fragP->fr_fix += 2; | |
3044 | break; | |
60bcf0fa | 3045 | |
606ab118 AM |
3046 | case STATE_INDEXED_OFFSET: |
3047 | assert (current_architecture & cpu6812); | |
60bcf0fa | 3048 | |
c9e03e8b SC |
3049 | if (fragP->fr_symbol |
3050 | && S_GET_SEGMENT (fragP->fr_symbol) == absolute_section) | |
3051 | { | |
3052 | fragP->fr_subtype = ENCODE_RELAX (STATE_INDEXED_OFFSET, | |
3053 | STATE_BITS5); | |
3054 | /* Return the size of the variable part of the frag. */ | |
3055 | return md_relax_table[fragP->fr_subtype].rlx_length; | |
3056 | } | |
3057 | else | |
3058 | { | |
3059 | /* Switch the indexed operation to 16-bit mode. */ | |
3060 | fragP->fr_opcode[0] = fragP->fr_opcode[0] << 3; | |
3061 | fragP->fr_opcode[0] |= 0xe2; | |
3062 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
3063 | fragP->fr_offset, 0, BFD_RELOC_16); | |
3064 | fragP->fr_fix += 2; | |
3065 | } | |
606ab118 | 3066 | break; |
60bcf0fa | 3067 | |
75538612 SC |
3068 | case STATE_INDEXED_PCREL: |
3069 | assert (current_architecture & cpu6812); | |
3070 | ||
3071 | if (fragP->fr_symbol | |
3072 | && S_GET_SEGMENT (fragP->fr_symbol) == absolute_section) | |
3073 | { | |
3074 | fragP->fr_subtype = ENCODE_RELAX (STATE_INDEXED_PCREL, | |
3075 | STATE_BITS5); | |
3076 | /* Return the size of the variable part of the frag. */ | |
3077 | return md_relax_table[fragP->fr_subtype].rlx_length; | |
3078 | } | |
3079 | else | |
3080 | { | |
3081 | fixS* fixp; | |
3082 | ||
3083 | fragP->fr_opcode[0] = fragP->fr_opcode[0] << 3; | |
3084 | fragP->fr_opcode[0] |= 0xe2; | |
3085 | fixp = fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
3086 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); | |
3087 | fragP->fr_fix += 2; | |
3088 | } | |
3089 | break; | |
3090 | ||
606ab118 AM |
3091 | case STATE_XBCC_BRANCH: |
3092 | assert (current_architecture & cpu6812); | |
3093 | ||
3094 | fragP->fr_opcode[0] ^= 0x20; /* Reverse sense of branch. */ | |
3095 | fragP->fr_opcode[1] = 3; /* Skip next jmp insn (3 bytes). */ | |
60bcf0fa | 3096 | |
606ab118 AM |
3097 | /* Don't use fr_opcode[2] because this may be |
3098 | in a different frag. */ | |
3099 | buffer_address[0] = M6812_JMP; | |
3100 | ||
3101 | fragP->fr_fix++; | |
3102 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
3103 | fragP->fr_offset, 0, BFD_RELOC_16); | |
3104 | fragP->fr_fix += 2; | |
3105 | break; | |
60bcf0fa | 3106 | |
606ab118 AM |
3107 | case STATE_CONDITIONAL_BRANCH_6812: |
3108 | assert (current_architecture & cpu6812); | |
3109 | ||
3110 | /* Translate into a lbcc branch. */ | |
3111 | fragP->fr_opcode[1] = fragP->fr_opcode[0]; | |
3112 | fragP->fr_opcode[0] = M6811_OPCODE_PAGE2; | |
3113 | ||
3114 | fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol, | |
e371935f | 3115 | fragP->fr_offset, 1, BFD_RELOC_16_PCREL); |
606ab118 AM |
3116 | fragP->fr_fix += 2; |
3117 | break; | |
3118 | ||
3119 | default: | |
3120 | as_fatal (_("Subtype %d is not recognized."), fragP->fr_subtype); | |
3121 | } | |
60bcf0fa | 3122 | frag_wane (fragP); |
60bcf0fa | 3123 | |
606ab118 AM |
3124 | /* Return the growth in the fixed part of the frag. */ |
3125 | return fragP->fr_fix - old_fr_fix; | |
3126 | } | |
60bcf0fa | 3127 | |
606ab118 AM |
3128 | /* Relaxable cases. */ |
3129 | switch (RELAX_STATE (fragP->fr_subtype)) | |
60bcf0fa | 3130 | { |
606ab118 AM |
3131 | case STATE_PC_RELATIVE: |
3132 | /* This relax is only for bsr and bra. */ | |
3133 | assert (IS_OPCODE (fragP->fr_opcode[0], M6811_BSR) | |
3134 | || IS_OPCODE (fragP->fr_opcode[0], M6811_BRA) | |
3135 | || IS_OPCODE (fragP->fr_opcode[0], M6812_BSR)); | |
3136 | ||
3137 | fragP->fr_subtype = ENCODE_RELAX (STATE_PC_RELATIVE, STATE_BYTE); | |
3138 | break; | |
3139 | ||
3140 | case STATE_CONDITIONAL_BRANCH: | |
3141 | assert (current_architecture & cpu6811); | |
3142 | ||
3143 | fragP->fr_subtype = ENCODE_RELAX (STATE_CONDITIONAL_BRANCH, | |
3144 | STATE_BYTE); | |
3145 | break; | |
3146 | ||
3147 | case STATE_INDEXED_OFFSET: | |
3148 | assert (current_architecture & cpu6812); | |
3149 | ||
60bcf0fa NC |
3150 | fragP->fr_subtype = ENCODE_RELAX (STATE_INDEXED_OFFSET, |
3151 | STATE_BITS5); | |
606ab118 | 3152 | break; |
60bcf0fa | 3153 | |
75538612 SC |
3154 | case STATE_INDEXED_PCREL: |
3155 | assert (current_architecture & cpu6812); | |
3156 | ||
3157 | fragP->fr_subtype = ENCODE_RELAX (STATE_INDEXED_PCREL, | |
3158 | STATE_BITS5); | |
3159 | break; | |
3160 | ||
606ab118 AM |
3161 | case STATE_XBCC_BRANCH: |
3162 | assert (current_architecture & cpu6812); | |
60bcf0fa | 3163 | |
60bcf0fa | 3164 | fragP->fr_subtype = ENCODE_RELAX (STATE_XBCC_BRANCH, STATE_BYTE); |
606ab118 | 3165 | break; |
60bcf0fa | 3166 | |
606ab118 AM |
3167 | case STATE_CONDITIONAL_BRANCH_6812: |
3168 | assert (current_architecture & cpu6812); | |
60bcf0fa | 3169 | |
60bcf0fa NC |
3170 | fragP->fr_subtype = ENCODE_RELAX (STATE_CONDITIONAL_BRANCH_6812, |
3171 | STATE_BYTE); | |
606ab118 | 3172 | break; |
60bcf0fa | 3173 | } |
60bcf0fa NC |
3174 | } |
3175 | ||
606ab118 AM |
3176 | if (fragP->fr_subtype >= sizeof (md_relax_table) / sizeof (md_relax_table[0])) |
3177 | as_fatal (_("Subtype %d is not recognized."), fragP->fr_subtype); | |
3178 | ||
3179 | /* Return the size of the variable part of the frag. */ | |
3180 | return md_relax_table[fragP->fr_subtype].rlx_length; | |
60bcf0fa NC |
3181 | } |
3182 | ||
e371935f SC |
3183 | /* See whether we need to force a relocation into the output file. */ |
3184 | int | |
3185 | tc_m68hc11_force_relocation (fixP) | |
3186 | fixS * fixP; | |
3187 | { | |
3188 | switch (fixP->fx_r_type) | |
3189 | { | |
3190 | case BFD_RELOC_VTABLE_INHERIT: | |
3191 | case BFD_RELOC_VTABLE_ENTRY: | |
3192 | case BFD_RELOC_M68HC11_RL_GROUP: | |
3193 | return 1; | |
3194 | ||
3195 | default: | |
a161fe53 | 3196 | break; |
e371935f | 3197 | } |
a161fe53 AM |
3198 | |
3199 | return S_FORCE_RELOC (fixP->fx_addsy); | |
e371935f SC |
3200 | } |
3201 | ||
3202 | /* Here we decide which fixups can be adjusted to make them relative | |
3203 | to the beginning of the section instead of the symbol. Basically | |
3204 | we need to make sure that the linker relaxation is done | |
3205 | correctly, so in some cases we force the original symbol to be | |
3206 | used. */ | |
3207 | int | |
3208 | tc_m68hc11_fix_adjustable (fixP) | |
3209 | fixS *fixP; | |
3210 | { | |
e371935f SC |
3211 | switch (fixP->fx_r_type) |
3212 | { | |
3213 | /* For the linker relaxation to work correctly, these relocs | |
3214 | need to be on the symbol itself. */ | |
3215 | case BFD_RELOC_16: | |
3216 | case BFD_RELOC_LO16: | |
3217 | case BFD_RELOC_M68HC11_RL_JUMP: | |
3218 | case BFD_RELOC_M68HC11_RL_GROUP: | |
3219 | case BFD_RELOC_VTABLE_INHERIT: | |
3220 | case BFD_RELOC_VTABLE_ENTRY: | |
3221 | return 0; | |
3222 | ||
3223 | case BFD_RELOC_32: | |
3224 | default: | |
3225 | return 1; | |
3226 | } | |
3227 | } | |
3228 | ||
94f592af NC |
3229 | void |
3230 | md_apply_fix3 (fixP, valP, seg) | |
3231 | fixS *fixP; | |
3232 | valueT *valP; | |
3233 | segT seg ATTRIBUTE_UNUSED; | |
60bcf0fa NC |
3234 | { |
3235 | char *where; | |
94f592af | 3236 | long value = * valP; |
60bcf0fa NC |
3237 | int op_type; |
3238 | ||
94f592af NC |
3239 | if (fixP->fx_addsy == (symbolS *) NULL) |
3240 | fixP->fx_done = 1; | |
3241 | ||
a161fe53 AM |
3242 | /* We don't actually support subtracting a symbol. */ |
3243 | if (fixP->fx_subsy != (symbolS *) NULL) | |
3244 | as_bad_where (fixP->fx_file, fixP->fx_line, _("Expression too complex.")); | |
60bcf0fa | 3245 | |
94f592af | 3246 | op_type = fixP->fx_r_type; |
60bcf0fa NC |
3247 | |
3248 | /* Patch the instruction with the resolved operand. Elf relocation | |
3249 | info will also be generated to take care of linker/loader fixups. | |
3250 | The 68HC11 addresses only 64Kb, we are only concerned by 8 and 16-bit | |
3251 | relocs. BFD_RELOC_8 is basically used for .page0 access (the linker | |
3252 | will warn for overflows). BFD_RELOC_8_PCREL should not be generated | |
3253 | because it's either resolved or turned out into non-relative insns (see | |
3254 | relax table, bcc, bra, bsr transformations) | |
3255 | ||
3256 | The BFD_RELOC_32 is necessary for the support of --gstabs. */ | |
94f592af | 3257 | where = fixP->fx_frag->fr_literal + fixP->fx_where; |
60bcf0fa | 3258 | |
94f592af | 3259 | switch (fixP->fx_r_type) |
60bcf0fa NC |
3260 | { |
3261 | case BFD_RELOC_32: | |
3262 | bfd_putb32 ((bfd_vma) value, (unsigned char *) where); | |
3263 | break; | |
3264 | ||
7bfda7eb SC |
3265 | case BFD_RELOC_24: |
3266 | case BFD_RELOC_M68HC11_24: | |
3267 | bfd_putb16 ((bfd_vma) (value & 0x0ffff), (unsigned char *) where); | |
3268 | ((bfd_byte*) where)[2] = ((value >> 16) & 0x0ff); | |
3269 | break; | |
3270 | ||
60bcf0fa NC |
3271 | case BFD_RELOC_16: |
3272 | case BFD_RELOC_16_PCREL: | |
7bfda7eb | 3273 | case BFD_RELOC_M68HC11_LO16: |
60bcf0fa NC |
3274 | bfd_putb16 ((bfd_vma) value, (unsigned char *) where); |
3275 | if (value < -65537 || value > 65535) | |
94f592af | 3276 | as_bad_where (fixP->fx_file, fixP->fx_line, |
60bcf0fa NC |
3277 | _("Value out of 16-bit range.")); |
3278 | break; | |
3279 | ||
3280 | case BFD_RELOC_M68HC11_HI8: | |
3281 | value = value >> 8; | |
fafb6d17 | 3282 | /* Fall through. */ |
60bcf0fa NC |
3283 | |
3284 | case BFD_RELOC_M68HC11_LO8: | |
3285 | case BFD_RELOC_8: | |
7bfda7eb | 3286 | case BFD_RELOC_M68HC11_PAGE: |
fafb6d17 NC |
3287 | #if 0 |
3288 | bfd_putb8 ((bfd_vma) value, (unsigned char *) where); | |
3289 | #endif | |
60bcf0fa NC |
3290 | ((bfd_byte *) where)[0] = (bfd_byte) value; |
3291 | break; | |
3292 | ||
3293 | case BFD_RELOC_8_PCREL: | |
fafb6d17 NC |
3294 | #if 0 |
3295 | bfd_putb8 ((bfd_vma) value, (unsigned char *) where); | |
3296 | #endif | |
60bcf0fa NC |
3297 | ((bfd_byte *) where)[0] = (bfd_byte) value; |
3298 | ||
3299 | if (value < -128 || value > 127) | |
94f592af | 3300 | as_bad_where (fixP->fx_file, fixP->fx_line, |
60bcf0fa NC |
3301 | _("Value %ld too large for 8-bit PC-relative branch."), |
3302 | value); | |
3303 | break; | |
3304 | ||
3305 | case BFD_RELOC_M68HC11_3B: | |
3306 | if (value <= 0 || value > 8) | |
94f592af | 3307 | as_bad_where (fixP->fx_file, fixP->fx_line, |
60bcf0fa NC |
3308 | _("Auto increment/decrement offset '%ld' is out of range."), |
3309 | value); | |
3310 | if (where[0] & 0x8) | |
3311 | value = 8 - value; | |
3312 | else | |
3313 | value--; | |
3314 | ||
3315 | where[0] = where[0] | (value & 0x07); | |
3316 | break; | |
3317 | ||
e371935f SC |
3318 | case BFD_RELOC_M68HC11_RL_JUMP: |
3319 | case BFD_RELOC_M68HC11_RL_GROUP: | |
3320 | case BFD_RELOC_VTABLE_INHERIT: | |
3321 | case BFD_RELOC_VTABLE_ENTRY: | |
3322 | fixP->fx_done = 0; | |
3323 | return; | |
3324 | ||
60bcf0fa NC |
3325 | default: |
3326 | as_fatal (_("Line %d: unknown relocation type: 0x%x."), | |
94f592af | 3327 | fixP->fx_line, fixP->fx_r_type); |
60bcf0fa | 3328 | } |
60bcf0fa | 3329 | } |
eb086b59 SC |
3330 | |
3331 | /* Set the ELF specific flags. */ | |
3332 | void | |
3333 | m68hc11_elf_final_processing () | |
3334 | { | |
3335 | elf_elfheader (stdoutput)->e_flags &= ~EF_M68HC11_ABI; | |
3336 | elf_elfheader (stdoutput)->e_flags |= elf_flags; | |
3337 | } |