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1 | /* Target-dependent code for the Renesas RL78 for GDB, the GNU debugger. |
2 | ||
32d0add0 | 3 | Copyright (C) 2011-2015 Free Software Foundation, Inc. |
9058f767 KB |
4 | |
5 | Contributed by Red Hat, Inc. | |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "arch-utils.h" | |
24 | #include "prologue-value.h" | |
25 | #include "target.h" | |
26 | #include "regcache.h" | |
27 | #include "opcode/rl78.h" | |
28 | #include "dis-asm.h" | |
29 | #include "gdbtypes.h" | |
30 | #include "frame.h" | |
31 | #include "frame-unwind.h" | |
32 | #include "frame-base.h" | |
33 | #include "value.h" | |
34 | #include "gdbcore.h" | |
35 | #include "dwarf2-frame.h" | |
c47a44f4 | 36 | #include "reggroups.h" |
9058f767 KB |
37 | |
38 | #include "elf/rl78.h" | |
39 | #include "elf-bfd.h" | |
40 | ||
41 | /* Register Banks. */ | |
42 | ||
43 | enum | |
44 | { | |
45 | RL78_BANK0 = 0, | |
46 | RL78_BANK1 = 1, | |
47 | RL78_BANK2 = 2, | |
48 | RL78_BANK3 = 3, | |
49 | RL78_NUMBANKS = 4, | |
50 | RL78_REGS_PER_BANK = 8 | |
51 | }; | |
52 | ||
53 | /* Register Numbers. */ | |
54 | ||
55 | enum | |
56 | { | |
57 | /* All general purpose registers are 8 bits wide. */ | |
c47a44f4 KB |
58 | RL78_RAW_BANK0_R0_REGNUM = 0, |
59 | RL78_RAW_BANK0_R1_REGNUM, | |
60 | RL78_RAW_BANK0_R2_REGNUM, | |
61 | RL78_RAW_BANK0_R3_REGNUM, | |
62 | RL78_RAW_BANK0_R4_REGNUM, | |
63 | RL78_RAW_BANK0_R5_REGNUM, | |
64 | RL78_RAW_BANK0_R6_REGNUM, | |
65 | RL78_RAW_BANK0_R7_REGNUM, | |
66 | ||
67 | RL78_RAW_BANK1_R0_REGNUM, | |
68 | RL78_RAW_BANK1_R1_REGNUM, | |
69 | RL78_RAW_BANK1_R2_REGNUM, | |
70 | RL78_RAW_BANK1_R3_REGNUM, | |
71 | RL78_RAW_BANK1_R4_REGNUM, | |
72 | RL78_RAW_BANK1_R5_REGNUM, | |
73 | RL78_RAW_BANK1_R6_REGNUM, | |
74 | RL78_RAW_BANK1_R7_REGNUM, | |
75 | ||
76 | RL78_RAW_BANK2_R0_REGNUM, | |
77 | RL78_RAW_BANK2_R1_REGNUM, | |
78 | RL78_RAW_BANK2_R2_REGNUM, | |
79 | RL78_RAW_BANK2_R3_REGNUM, | |
80 | RL78_RAW_BANK2_R4_REGNUM, | |
81 | RL78_RAW_BANK2_R5_REGNUM, | |
82 | RL78_RAW_BANK2_R6_REGNUM, | |
83 | RL78_RAW_BANK2_R7_REGNUM, | |
84 | ||
85 | RL78_RAW_BANK3_R0_REGNUM, | |
86 | RL78_RAW_BANK3_R1_REGNUM, | |
87 | RL78_RAW_BANK3_R2_REGNUM, | |
88 | RL78_RAW_BANK3_R3_REGNUM, | |
89 | RL78_RAW_BANK3_R4_REGNUM, | |
90 | RL78_RAW_BANK3_R5_REGNUM, | |
91 | RL78_RAW_BANK3_R6_REGNUM, | |
92 | RL78_RAW_BANK3_R7_REGNUM, | |
93 | ||
94 | RL78_PSW_REGNUM, /* 8 bits */ | |
95 | RL78_ES_REGNUM, /* 8 bits */ | |
96 | RL78_CS_REGNUM, /* 8 bits */ | |
ba89f962 | 97 | RL78_RAW_PC_REGNUM, /* 20 bits; we'll use 32 bits for it. */ |
c47a44f4 KB |
98 | |
99 | /* Fixed address SFRs (some of those above are SFRs too.) */ | |
100 | RL78_SPL_REGNUM, /* 8 bits; lower half of SP */ | |
101 | RL78_SPH_REGNUM, /* 8 bits; upper half of SP */ | |
102 | RL78_PMC_REGNUM, /* 8 bits */ | |
103 | RL78_MEM_REGNUM, /* 8 bits ?? */ | |
104 | ||
105 | RL78_NUM_REGS, | |
106 | ||
107 | /* Pseudo registers. */ | |
ba89f962 KB |
108 | RL78_PC_REGNUM = RL78_NUM_REGS, |
109 | RL78_SP_REGNUM, | |
c47a44f4 KB |
110 | |
111 | RL78_X_REGNUM, | |
112 | RL78_A_REGNUM, | |
113 | RL78_C_REGNUM, | |
114 | RL78_B_REGNUM, | |
115 | RL78_E_REGNUM, | |
116 | RL78_D_REGNUM, | |
117 | RL78_L_REGNUM, | |
118 | RL78_H_REGNUM, | |
119 | ||
120 | RL78_AX_REGNUM, | |
121 | RL78_BC_REGNUM, | |
122 | RL78_DE_REGNUM, | |
123 | RL78_HL_REGNUM, | |
124 | ||
125 | RL78_BANK0_R0_REGNUM, | |
9058f767 KB |
126 | RL78_BANK0_R1_REGNUM, |
127 | RL78_BANK0_R2_REGNUM, | |
128 | RL78_BANK0_R3_REGNUM, | |
129 | RL78_BANK0_R4_REGNUM, | |
130 | RL78_BANK0_R5_REGNUM, | |
131 | RL78_BANK0_R6_REGNUM, | |
132 | RL78_BANK0_R7_REGNUM, | |
133 | ||
134 | RL78_BANK1_R0_REGNUM, | |
135 | RL78_BANK1_R1_REGNUM, | |
136 | RL78_BANK1_R2_REGNUM, | |
137 | RL78_BANK1_R3_REGNUM, | |
138 | RL78_BANK1_R4_REGNUM, | |
139 | RL78_BANK1_R5_REGNUM, | |
140 | RL78_BANK1_R6_REGNUM, | |
141 | RL78_BANK1_R7_REGNUM, | |
142 | ||
143 | RL78_BANK2_R0_REGNUM, | |
144 | RL78_BANK2_R1_REGNUM, | |
145 | RL78_BANK2_R2_REGNUM, | |
146 | RL78_BANK2_R3_REGNUM, | |
147 | RL78_BANK2_R4_REGNUM, | |
148 | RL78_BANK2_R5_REGNUM, | |
149 | RL78_BANK2_R6_REGNUM, | |
150 | RL78_BANK2_R7_REGNUM, | |
151 | ||
152 | RL78_BANK3_R0_REGNUM, | |
153 | RL78_BANK3_R1_REGNUM, | |
154 | RL78_BANK3_R2_REGNUM, | |
155 | RL78_BANK3_R3_REGNUM, | |
156 | RL78_BANK3_R4_REGNUM, | |
157 | RL78_BANK3_R5_REGNUM, | |
158 | RL78_BANK3_R6_REGNUM, | |
159 | RL78_BANK3_R7_REGNUM, | |
160 | ||
c47a44f4 | 161 | RL78_BANK0_RP0_REGNUM, |
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162 | RL78_BANK0_RP1_REGNUM, |
163 | RL78_BANK0_RP2_REGNUM, | |
164 | RL78_BANK0_RP3_REGNUM, | |
165 | ||
166 | RL78_BANK1_RP0_REGNUM, | |
167 | RL78_BANK1_RP1_REGNUM, | |
168 | RL78_BANK1_RP2_REGNUM, | |
169 | RL78_BANK1_RP3_REGNUM, | |
170 | ||
171 | RL78_BANK2_RP0_REGNUM, | |
172 | RL78_BANK2_RP1_REGNUM, | |
173 | RL78_BANK2_RP2_REGNUM, | |
174 | RL78_BANK2_RP3_REGNUM, | |
175 | ||
176 | RL78_BANK3_RP0_REGNUM, | |
177 | RL78_BANK3_RP1_REGNUM, | |
178 | RL78_BANK3_RP2_REGNUM, | |
179 | RL78_BANK3_RP3_REGNUM, | |
180 | ||
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181 | /* These are the same as the above 16 registers, but have |
182 | a pointer type for use as base registers in expression | |
183 | evaluation. These are not user visible registers. */ | |
184 | RL78_BANK0_RP0_PTR_REGNUM, | |
185 | RL78_BANK0_RP1_PTR_REGNUM, | |
186 | RL78_BANK0_RP2_PTR_REGNUM, | |
187 | RL78_BANK0_RP3_PTR_REGNUM, | |
188 | ||
189 | RL78_BANK1_RP0_PTR_REGNUM, | |
190 | RL78_BANK1_RP1_PTR_REGNUM, | |
191 | RL78_BANK1_RP2_PTR_REGNUM, | |
192 | RL78_BANK1_RP3_PTR_REGNUM, | |
193 | ||
194 | RL78_BANK2_RP0_PTR_REGNUM, | |
195 | RL78_BANK2_RP1_PTR_REGNUM, | |
196 | RL78_BANK2_RP2_PTR_REGNUM, | |
197 | RL78_BANK2_RP3_PTR_REGNUM, | |
198 | ||
199 | RL78_BANK3_RP0_PTR_REGNUM, | |
200 | RL78_BANK3_RP1_PTR_REGNUM, | |
201 | RL78_BANK3_RP2_PTR_REGNUM, | |
202 | RL78_BANK3_RP3_PTR_REGNUM, | |
203 | ||
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204 | RL78_NUM_TOTAL_REGS, |
205 | RL78_NUM_PSEUDO_REGS = RL78_NUM_TOTAL_REGS - RL78_NUM_REGS | |
206 | }; | |
207 | ||
0bca7f99 KB |
208 | #define RL78_SP_ADDR 0xffff8 |
209 | ||
9058f767 KB |
210 | /* Architecture specific data. */ |
211 | ||
212 | struct gdbarch_tdep | |
213 | { | |
214 | /* The ELF header flags specify the multilib used. */ | |
215 | int elf_flags; | |
216 | ||
217 | struct type *rl78_void, | |
218 | *rl78_uint8, | |
219 | *rl78_int8, | |
220 | *rl78_uint16, | |
221 | *rl78_int16, | |
222 | *rl78_uint32, | |
223 | *rl78_int32, | |
224 | *rl78_data_pointer, | |
225 | *rl78_code_pointer; | |
226 | }; | |
227 | ||
228 | /* This structure holds the results of a prologue analysis. */ | |
229 | ||
230 | struct rl78_prologue | |
231 | { | |
232 | /* The offset from the frame base to the stack pointer --- always | |
233 | zero or negative. | |
234 | ||
235 | Calling this a "size" is a bit misleading, but given that the | |
236 | stack grows downwards, using offsets for everything keeps one | |
237 | from going completely sign-crazy: you never change anything's | |
238 | sign for an ADD instruction; always change the second operand's | |
239 | sign for a SUB instruction; and everything takes care of | |
240 | itself. */ | |
241 | int frame_size; | |
242 | ||
243 | /* Non-zero if this function has initialized the frame pointer from | |
244 | the stack pointer, zero otherwise. */ | |
245 | int has_frame_ptr; | |
246 | ||
247 | /* If has_frame_ptr is non-zero, this is the offset from the frame | |
248 | base to where the frame pointer points. This is always zero or | |
249 | negative. */ | |
250 | int frame_ptr_offset; | |
251 | ||
252 | /* The address of the first instruction at which the frame has been | |
253 | set up and the arguments are where the debug info says they are | |
254 | --- as best as we can tell. */ | |
255 | CORE_ADDR prologue_end; | |
256 | ||
257 | /* reg_offset[R] is the offset from the CFA at which register R is | |
258 | saved, or 1 if register R has not been saved. (Real values are | |
259 | always zero or negative.) */ | |
260 | int reg_offset[RL78_NUM_TOTAL_REGS]; | |
261 | }; | |
262 | ||
263 | /* Implement the "register_type" gdbarch method. */ | |
264 | ||
265 | static struct type * | |
266 | rl78_register_type (struct gdbarch *gdbarch, int reg_nr) | |
267 | { | |
268 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
269 | ||
270 | if (reg_nr == RL78_PC_REGNUM) | |
271 | return tdep->rl78_code_pointer; | |
ba89f962 KB |
272 | else if (reg_nr == RL78_RAW_PC_REGNUM) |
273 | return tdep->rl78_uint32; | |
9058f767 | 274 | else if (reg_nr <= RL78_MEM_REGNUM |
c47a44f4 KB |
275 | || (RL78_X_REGNUM <= reg_nr && reg_nr <= RL78_H_REGNUM) |
276 | || (RL78_BANK0_R0_REGNUM <= reg_nr | |
277 | && reg_nr <= RL78_BANK3_R7_REGNUM)) | |
9058f767 | 278 | return tdep->rl78_int8; |
6d451942 KB |
279 | else if (reg_nr == RL78_SP_REGNUM |
280 | || (RL78_BANK0_RP0_PTR_REGNUM <= reg_nr | |
281 | && reg_nr <= RL78_BANK3_RP3_PTR_REGNUM)) | |
9058f767 | 282 | return tdep->rl78_data_pointer; |
6d451942 KB |
283 | else |
284 | return tdep->rl78_int16; | |
9058f767 KB |
285 | } |
286 | ||
287 | /* Implement the "register_name" gdbarch method. */ | |
288 | ||
289 | static const char * | |
290 | rl78_register_name (struct gdbarch *gdbarch, int regnr) | |
291 | { | |
292 | static const char *const reg_names[] = | |
293 | { | |
c47a44f4 KB |
294 | "", /* bank0_r0 */ |
295 | "", /* bank0_r1 */ | |
296 | "", /* bank0_r2 */ | |
297 | "", /* bank0_r3 */ | |
298 | "", /* bank0_r4 */ | |
299 | "", /* bank0_r5 */ | |
300 | "", /* bank0_r6 */ | |
301 | "", /* bank0_r7 */ | |
302 | ||
303 | "", /* bank1_r0 */ | |
304 | "", /* bank1_r1 */ | |
305 | "", /* bank1_r2 */ | |
306 | "", /* bank1_r3 */ | |
307 | "", /* bank1_r4 */ | |
308 | "", /* bank1_r5 */ | |
309 | "", /* bank1_r6 */ | |
310 | "", /* bank1_r7 */ | |
311 | ||
312 | "", /* bank2_r0 */ | |
313 | "", /* bank2_r1 */ | |
314 | "", /* bank2_r2 */ | |
315 | "", /* bank2_r3 */ | |
316 | "", /* bank2_r4 */ | |
317 | "", /* bank2_r5 */ | |
318 | "", /* bank2_r6 */ | |
319 | "", /* bank2_r7 */ | |
320 | ||
321 | "", /* bank3_r0 */ | |
322 | "", /* bank3_r1 */ | |
323 | "", /* bank3_r2 */ | |
324 | "", /* bank3_r3 */ | |
325 | "", /* bank3_r4 */ | |
326 | "", /* bank3_r5 */ | |
327 | "", /* bank3_r6 */ | |
328 | "", /* bank3_r7 */ | |
329 | ||
330 | "psw", | |
331 | "es", | |
332 | "cs", | |
ba89f962 | 333 | "", |
c47a44f4 KB |
334 | |
335 | "", /* spl */ | |
336 | "", /* sph */ | |
337 | "pmc", | |
338 | "mem", | |
339 | ||
ba89f962 | 340 | "pc", |
c47a44f4 KB |
341 | "sp", |
342 | ||
343 | "x", | |
344 | "a", | |
345 | "c", | |
346 | "b", | |
347 | "e", | |
348 | "d", | |
349 | "l", | |
350 | "h", | |
351 | ||
352 | "ax", | |
353 | "bc", | |
354 | "de", | |
355 | "hl", | |
356 | ||
9058f767 KB |
357 | "bank0_r0", |
358 | "bank0_r1", | |
359 | "bank0_r2", | |
360 | "bank0_r3", | |
361 | "bank0_r4", | |
362 | "bank0_r5", | |
363 | "bank0_r6", | |
364 | "bank0_r7", | |
365 | ||
366 | "bank1_r0", | |
367 | "bank1_r1", | |
368 | "bank1_r2", | |
369 | "bank1_r3", | |
370 | "bank1_r4", | |
371 | "bank1_r5", | |
372 | "bank1_r6", | |
373 | "bank1_r7", | |
374 | ||
375 | "bank2_r0", | |
376 | "bank2_r1", | |
377 | "bank2_r2", | |
378 | "bank2_r3", | |
379 | "bank2_r4", | |
380 | "bank2_r5", | |
381 | "bank2_r6", | |
382 | "bank2_r7", | |
383 | ||
384 | "bank3_r0", | |
385 | "bank3_r1", | |
386 | "bank3_r2", | |
387 | "bank3_r3", | |
388 | "bank3_r4", | |
389 | "bank3_r5", | |
390 | "bank3_r6", | |
391 | "bank3_r7", | |
392 | ||
9058f767 KB |
393 | "bank0_rp0", |
394 | "bank0_rp1", | |
395 | "bank0_rp2", | |
396 | "bank0_rp3", | |
397 | ||
398 | "bank1_rp0", | |
399 | "bank1_rp1", | |
400 | "bank1_rp2", | |
401 | "bank1_rp3", | |
402 | ||
403 | "bank2_rp0", | |
404 | "bank2_rp1", | |
405 | "bank2_rp2", | |
406 | "bank2_rp3", | |
407 | ||
408 | "bank3_rp0", | |
409 | "bank3_rp1", | |
410 | "bank3_rp2", | |
6d451942 KB |
411 | "bank3_rp3", |
412 | ||
413 | /* The 16 register slots would be named | |
414 | bank0_rp0_ptr_regnum ... bank3_rp3_ptr_regnum, but we don't | |
415 | want these to be user visible registers. */ | |
416 | "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "" | |
c47a44f4 | 417 | }; |
9058f767 | 418 | |
c47a44f4 KB |
419 | return reg_names[regnr]; |
420 | } | |
9058f767 | 421 | |
bc3c6b36 KB |
422 | /* Implement the "register_name" gdbarch method for the g10 variant. */ |
423 | ||
424 | static const char * | |
425 | rl78_g10_register_name (struct gdbarch *gdbarch, int regnr) | |
426 | { | |
427 | static const char *const reg_names[] = | |
428 | { | |
429 | "", /* bank0_r0 */ | |
430 | "", /* bank0_r1 */ | |
431 | "", /* bank0_r2 */ | |
432 | "", /* bank0_r3 */ | |
433 | "", /* bank0_r4 */ | |
434 | "", /* bank0_r5 */ | |
435 | "", /* bank0_r6 */ | |
436 | "", /* bank0_r7 */ | |
437 | ||
438 | "", /* bank1_r0 */ | |
439 | "", /* bank1_r1 */ | |
440 | "", /* bank1_r2 */ | |
441 | "", /* bank1_r3 */ | |
442 | "", /* bank1_r4 */ | |
443 | "", /* bank1_r5 */ | |
444 | "", /* bank1_r6 */ | |
445 | "", /* bank1_r7 */ | |
446 | ||
447 | "", /* bank2_r0 */ | |
448 | "", /* bank2_r1 */ | |
449 | "", /* bank2_r2 */ | |
450 | "", /* bank2_r3 */ | |
451 | "", /* bank2_r4 */ | |
452 | "", /* bank2_r5 */ | |
453 | "", /* bank2_r6 */ | |
454 | "", /* bank2_r7 */ | |
455 | ||
456 | "", /* bank3_r0 */ | |
457 | "", /* bank3_r1 */ | |
458 | "", /* bank3_r2 */ | |
459 | "", /* bank3_r3 */ | |
460 | "", /* bank3_r4 */ | |
461 | "", /* bank3_r5 */ | |
462 | "", /* bank3_r6 */ | |
463 | "", /* bank3_r7 */ | |
464 | ||
465 | "psw", | |
466 | "es", | |
467 | "cs", | |
468 | "", | |
469 | ||
470 | "", /* spl */ | |
471 | "", /* sph */ | |
472 | "pmc", | |
473 | "mem", | |
474 | ||
475 | "pc", | |
476 | "sp", | |
477 | ||
478 | "x", | |
479 | "a", | |
480 | "c", | |
481 | "b", | |
482 | "e", | |
483 | "d", | |
484 | "l", | |
485 | "h", | |
486 | ||
487 | "ax", | |
488 | "bc", | |
489 | "de", | |
490 | "hl", | |
491 | ||
492 | "bank0_r0", | |
493 | "bank0_r1", | |
494 | "bank0_r2", | |
495 | "bank0_r3", | |
496 | "bank0_r4", | |
497 | "bank0_r5", | |
498 | "bank0_r6", | |
499 | "bank0_r7", | |
500 | ||
501 | "", | |
502 | "", | |
503 | "", | |
504 | "", | |
505 | "", | |
506 | "", | |
507 | "", | |
508 | "", | |
509 | ||
510 | "", | |
511 | "", | |
512 | "", | |
513 | "", | |
514 | "", | |
515 | "", | |
516 | "", | |
517 | "", | |
518 | ||
519 | "", | |
520 | "", | |
521 | "", | |
522 | "", | |
523 | "", | |
524 | "", | |
525 | "", | |
526 | "", | |
527 | ||
528 | "bank0_rp0", | |
529 | "bank0_rp1", | |
530 | "bank0_rp2", | |
531 | "bank0_rp3", | |
532 | ||
533 | "", | |
534 | "", | |
535 | "", | |
536 | "", | |
537 | ||
538 | "", | |
539 | "", | |
540 | "", | |
541 | "", | |
542 | ||
543 | "", | |
544 | "", | |
545 | "", | |
6d451942 KB |
546 | "", |
547 | ||
548 | /* The 16 register slots would be named | |
549 | bank0_rp0_ptr_regnum ... bank3_rp3_ptr_regnum, but we don't | |
550 | want these to be user visible registers. */ | |
551 | "", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "" | |
bc3c6b36 KB |
552 | }; |
553 | ||
554 | return reg_names[regnr]; | |
555 | } | |
556 | ||
c47a44f4 | 557 | /* Implement the "register_reggroup_p" gdbarch method. */ |
9058f767 | 558 | |
c47a44f4 KB |
559 | static int |
560 | rl78_register_reggroup_p (struct gdbarch *gdbarch, int regnum, | |
561 | struct reggroup *group) | |
562 | { | |
563 | if (group == all_reggroup) | |
564 | return 1; | |
9058f767 | 565 | |
c47a44f4 KB |
566 | /* All other registers are saved and restored. */ |
567 | if (group == save_reggroup || group == restore_reggroup) | |
568 | { | |
b3ce41ea | 569 | if ((regnum < RL78_NUM_REGS |
ba89f962 KB |
570 | && regnum != RL78_SPL_REGNUM |
571 | && regnum != RL78_SPH_REGNUM | |
572 | && regnum != RL78_RAW_PC_REGNUM) | |
573 | || regnum == RL78_SP_REGNUM | |
574 | || regnum == RL78_PC_REGNUM) | |
c47a44f4 KB |
575 | return 1; |
576 | else | |
577 | return 0; | |
578 | } | |
579 | ||
580 | if ((RL78_BANK0_R0_REGNUM <= regnum && regnum <= RL78_BANK3_R7_REGNUM) | |
581 | || regnum == RL78_ES_REGNUM | |
582 | || regnum == RL78_CS_REGNUM | |
583 | || regnum == RL78_SPL_REGNUM | |
584 | || regnum == RL78_SPH_REGNUM | |
585 | || regnum == RL78_PMC_REGNUM | |
586 | || regnum == RL78_MEM_REGNUM | |
ba89f962 | 587 | || regnum == RL78_RAW_PC_REGNUM |
c47a44f4 KB |
588 | || (RL78_BANK0_RP0_REGNUM <= regnum && regnum <= RL78_BANK3_RP3_REGNUM)) |
589 | return group == system_reggroup; | |
590 | ||
591 | return group == general_reggroup; | |
9058f767 KB |
592 | } |
593 | ||
594 | /* Strip bits to form an instruction address. (When fetching a | |
595 | 32-bit address from the stack, the high eight bits are garbage. | |
596 | This function strips off those unused bits.) */ | |
597 | ||
598 | static CORE_ADDR | |
599 | rl78_make_instruction_address (CORE_ADDR addr) | |
600 | { | |
601 | return addr & 0xffffff; | |
602 | } | |
603 | ||
604 | /* Set / clear bits necessary to make a data address. */ | |
605 | ||
606 | static CORE_ADDR | |
607 | rl78_make_data_address (CORE_ADDR addr) | |
608 | { | |
609 | return (addr & 0xffff) | 0xf0000; | |
610 | } | |
611 | ||
612 | /* Implement the "pseudo_register_read" gdbarch method. */ | |
613 | ||
614 | static enum register_status | |
615 | rl78_pseudo_register_read (struct gdbarch *gdbarch, | |
616 | struct regcache *regcache, | |
617 | int reg, gdb_byte *buffer) | |
618 | { | |
619 | enum register_status status; | |
620 | ||
c47a44f4 KB |
621 | if (RL78_BANK0_R0_REGNUM <= reg && reg <= RL78_BANK3_R7_REGNUM) |
622 | { | |
623 | int raw_regnum = RL78_RAW_BANK0_R0_REGNUM | |
624 | + (reg - RL78_BANK0_R0_REGNUM); | |
625 | ||
626 | status = regcache_raw_read (regcache, raw_regnum, buffer); | |
627 | } | |
628 | else if (RL78_BANK0_RP0_REGNUM <= reg && reg <= RL78_BANK3_RP3_REGNUM) | |
9058f767 KB |
629 | { |
630 | int raw_regnum = 2 * (reg - RL78_BANK0_RP0_REGNUM) | |
c47a44f4 | 631 | + RL78_RAW_BANK0_R0_REGNUM; |
9058f767 | 632 | |
6d451942 KB |
633 | status = regcache_raw_read (regcache, raw_regnum, buffer); |
634 | if (status == REG_VALID) | |
635 | status = regcache_raw_read (regcache, raw_regnum + 1, buffer + 1); | |
636 | } | |
637 | else if (RL78_BANK0_RP0_PTR_REGNUM <= reg && reg <= RL78_BANK3_RP3_PTR_REGNUM) | |
638 | { | |
639 | int raw_regnum = 2 * (reg - RL78_BANK0_RP0_PTR_REGNUM) | |
640 | + RL78_RAW_BANK0_R0_REGNUM; | |
641 | ||
9058f767 KB |
642 | status = regcache_raw_read (regcache, raw_regnum, buffer); |
643 | if (status == REG_VALID) | |
644 | status = regcache_raw_read (regcache, raw_regnum + 1, buffer + 1); | |
645 | } | |
646 | else if (reg == RL78_SP_REGNUM) | |
647 | { | |
648 | status = regcache_raw_read (regcache, RL78_SPL_REGNUM, buffer); | |
649 | if (status == REG_VALID) | |
650 | status = regcache_raw_read (regcache, RL78_SPH_REGNUM, buffer + 1); | |
651 | } | |
ba89f962 KB |
652 | else if (reg == RL78_PC_REGNUM) |
653 | { | |
654 | gdb_byte rawbuf[4]; | |
655 | ||
656 | status = regcache_raw_read (regcache, RL78_RAW_PC_REGNUM, rawbuf); | |
657 | memcpy (buffer, rawbuf, 3); | |
658 | } | |
9058f767 KB |
659 | else if (RL78_X_REGNUM <= reg && reg <= RL78_H_REGNUM) |
660 | { | |
661 | ULONGEST psw; | |
662 | ||
663 | status = regcache_raw_read_unsigned (regcache, RL78_PSW_REGNUM, &psw); | |
664 | if (status == REG_VALID) | |
665 | { | |
666 | /* RSB0 is at bit 3; RSBS1 is at bit 5. */ | |
667 | int bank = ((psw >> 3) & 1) | ((psw >> 4) & 1); | |
c47a44f4 | 668 | int raw_regnum = RL78_RAW_BANK0_R0_REGNUM + bank * RL78_REGS_PER_BANK |
9058f767 KB |
669 | + (reg - RL78_X_REGNUM); |
670 | status = regcache_raw_read (regcache, raw_regnum, buffer); | |
671 | } | |
672 | } | |
673 | else if (RL78_AX_REGNUM <= reg && reg <= RL78_HL_REGNUM) | |
674 | { | |
675 | ULONGEST psw; | |
676 | ||
677 | status = regcache_raw_read_unsigned (regcache, RL78_PSW_REGNUM, &psw); | |
678 | if (status == REG_VALID) | |
679 | { | |
680 | /* RSB0 is at bit 3; RSBS1 is at bit 5. */ | |
681 | int bank = ((psw >> 3) & 1) | ((psw >> 4) & 1); | |
c47a44f4 | 682 | int raw_regnum = RL78_RAW_BANK0_R0_REGNUM + bank * RL78_REGS_PER_BANK |
9058f767 KB |
683 | + 2 * (reg - RL78_AX_REGNUM); |
684 | status = regcache_raw_read (regcache, raw_regnum, buffer); | |
685 | if (status == REG_VALID) | |
686 | status = regcache_raw_read (regcache, raw_regnum + 1, | |
687 | buffer + 1); | |
688 | } | |
689 | } | |
690 | else | |
691 | gdb_assert_not_reached ("invalid pseudo register number"); | |
692 | return status; | |
693 | } | |
694 | ||
695 | /* Implement the "pseudo_register_write" gdbarch method. */ | |
696 | ||
697 | static void | |
698 | rl78_pseudo_register_write (struct gdbarch *gdbarch, | |
699 | struct regcache *regcache, | |
700 | int reg, const gdb_byte *buffer) | |
701 | { | |
c47a44f4 KB |
702 | if (RL78_BANK0_R0_REGNUM <= reg && reg <= RL78_BANK3_R7_REGNUM) |
703 | { | |
704 | int raw_regnum = RL78_RAW_BANK0_R0_REGNUM | |
705 | + (reg - RL78_BANK0_R0_REGNUM); | |
706 | ||
707 | regcache_raw_write (regcache, raw_regnum, buffer); | |
708 | } | |
709 | else if (RL78_BANK0_RP0_REGNUM <= reg && reg <= RL78_BANK3_RP3_REGNUM) | |
9058f767 KB |
710 | { |
711 | int raw_regnum = 2 * (reg - RL78_BANK0_RP0_REGNUM) | |
c47a44f4 | 712 | + RL78_RAW_BANK0_R0_REGNUM; |
9058f767 | 713 | |
6d451942 KB |
714 | regcache_raw_write (regcache, raw_regnum, buffer); |
715 | regcache_raw_write (regcache, raw_regnum + 1, buffer + 1); | |
716 | } | |
717 | else if (RL78_BANK0_RP0_PTR_REGNUM <= reg && reg <= RL78_BANK3_RP3_PTR_REGNUM) | |
718 | { | |
719 | int raw_regnum = 2 * (reg - RL78_BANK0_RP0_PTR_REGNUM) | |
720 | + RL78_RAW_BANK0_R0_REGNUM; | |
721 | ||
9058f767 KB |
722 | regcache_raw_write (regcache, raw_regnum, buffer); |
723 | regcache_raw_write (regcache, raw_regnum + 1, buffer + 1); | |
724 | } | |
725 | else if (reg == RL78_SP_REGNUM) | |
726 | { | |
727 | regcache_raw_write (regcache, RL78_SPL_REGNUM, buffer); | |
728 | regcache_raw_write (regcache, RL78_SPH_REGNUM, buffer + 1); | |
729 | } | |
ba89f962 KB |
730 | else if (reg == RL78_PC_REGNUM) |
731 | { | |
732 | gdb_byte rawbuf[4]; | |
733 | ||
734 | memcpy (rawbuf, buffer, 3); | |
735 | rawbuf[3] = 0; | |
736 | regcache_raw_write (regcache, RL78_RAW_PC_REGNUM, rawbuf); | |
737 | } | |
9058f767 KB |
738 | else if (RL78_X_REGNUM <= reg && reg <= RL78_H_REGNUM) |
739 | { | |
740 | ULONGEST psw; | |
741 | int bank; | |
742 | int raw_regnum; | |
743 | ||
744 | regcache_raw_read_unsigned (regcache, RL78_PSW_REGNUM, &psw); | |
745 | bank = ((psw >> 3) & 1) | ((psw >> 4) & 1); | |
746 | /* RSB0 is at bit 3; RSBS1 is at bit 5. */ | |
c47a44f4 | 747 | raw_regnum = RL78_RAW_BANK0_R0_REGNUM + bank * RL78_REGS_PER_BANK |
9058f767 KB |
748 | + (reg - RL78_X_REGNUM); |
749 | regcache_raw_write (regcache, raw_regnum, buffer); | |
750 | } | |
751 | else if (RL78_AX_REGNUM <= reg && reg <= RL78_HL_REGNUM) | |
752 | { | |
753 | ULONGEST psw; | |
754 | int bank, raw_regnum; | |
755 | ||
756 | regcache_raw_read_unsigned (regcache, RL78_PSW_REGNUM, &psw); | |
757 | bank = ((psw >> 3) & 1) | ((psw >> 4) & 1); | |
758 | /* RSB0 is at bit 3; RSBS1 is at bit 5. */ | |
c47a44f4 | 759 | raw_regnum = RL78_RAW_BANK0_R0_REGNUM + bank * RL78_REGS_PER_BANK |
9058f767 KB |
760 | + 2 * (reg - RL78_AX_REGNUM); |
761 | regcache_raw_write (regcache, raw_regnum, buffer); | |
762 | regcache_raw_write (regcache, raw_regnum + 1, buffer + 1); | |
763 | } | |
764 | else | |
765 | gdb_assert_not_reached ("invalid pseudo register number"); | |
766 | } | |
767 | ||
768 | /* Implement the "breakpoint_from_pc" gdbarch method. */ | |
769 | ||
693be288 | 770 | static const gdb_byte * |
9058f767 KB |
771 | rl78_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, |
772 | int *lenptr) | |
773 | { | |
774 | /* The documented BRK instruction is actually a two byte sequence, | |
775 | {0x61, 0xcc}, but instructions may be as short as one byte. | |
776 | Correspondence with Renesas revealed that the one byte sequence | |
777 | 0xff is used when a one byte breakpoint instruction is required. */ | |
778 | static gdb_byte breakpoint[] = { 0xff }; | |
779 | ||
780 | *lenptr = sizeof breakpoint; | |
781 | return breakpoint; | |
782 | } | |
783 | ||
784 | /* Define a "handle" struct for fetching the next opcode. */ | |
785 | ||
786 | struct rl78_get_opcode_byte_handle | |
787 | { | |
788 | CORE_ADDR pc; | |
789 | }; | |
790 | ||
0bca7f99 KB |
791 | static int |
792 | opc_reg_to_gdb_regnum (int opcreg) | |
793 | { | |
794 | switch (opcreg) | |
795 | { | |
796 | case RL78_Reg_X: | |
797 | return RL78_X_REGNUM; | |
798 | case RL78_Reg_A: | |
799 | return RL78_A_REGNUM; | |
800 | case RL78_Reg_C: | |
801 | return RL78_C_REGNUM; | |
802 | case RL78_Reg_B: | |
803 | return RL78_B_REGNUM; | |
804 | case RL78_Reg_E: | |
805 | return RL78_E_REGNUM; | |
806 | case RL78_Reg_D: | |
807 | return RL78_D_REGNUM; | |
808 | case RL78_Reg_L: | |
809 | return RL78_L_REGNUM; | |
810 | case RL78_Reg_H: | |
811 | return RL78_H_REGNUM; | |
812 | case RL78_Reg_AX: | |
813 | return RL78_AX_REGNUM; | |
814 | case RL78_Reg_BC: | |
815 | return RL78_BC_REGNUM; | |
816 | case RL78_Reg_DE: | |
817 | return RL78_DE_REGNUM; | |
818 | case RL78_Reg_HL: | |
819 | return RL78_HL_REGNUM; | |
820 | case RL78_Reg_SP: | |
821 | return RL78_SP_REGNUM; | |
822 | case RL78_Reg_PSW: | |
823 | return RL78_PSW_REGNUM; | |
824 | case RL78_Reg_CS: | |
825 | return RL78_CS_REGNUM; | |
826 | case RL78_Reg_ES: | |
827 | return RL78_ES_REGNUM; | |
828 | case RL78_Reg_PMC: | |
829 | return RL78_PMC_REGNUM; | |
830 | case RL78_Reg_MEM: | |
831 | return RL78_MEM_REGNUM; | |
832 | default: | |
833 | internal_error (__FILE__, __LINE__, | |
834 | _("Undefined mapping for opc reg %d"), | |
835 | opcreg); | |
836 | } | |
837 | ||
838 | /* Not reached. */ | |
839 | return 0; | |
840 | } | |
841 | ||
9058f767 KB |
842 | /* Fetch a byte on behalf of the opcode decoder. HANDLE contains |
843 | the memory address of the next byte to fetch. If successful, | |
844 | the address in the handle is updated and the byte fetched is | |
845 | returned as the value of the function. If not successful, -1 | |
846 | is returned. */ | |
847 | ||
848 | static int | |
849 | rl78_get_opcode_byte (void *handle) | |
850 | { | |
851 | struct rl78_get_opcode_byte_handle *opcdata = handle; | |
852 | int status; | |
853 | gdb_byte byte; | |
854 | ||
855 | status = target_read_memory (opcdata->pc, &byte, 1); | |
856 | if (status == 0) | |
857 | { | |
858 | opcdata->pc += 1; | |
859 | return byte; | |
860 | } | |
861 | else | |
862 | return -1; | |
863 | } | |
864 | ||
865 | /* Function for finding saved registers in a 'struct pv_area'; this | |
866 | function is passed to pv_area_scan. | |
867 | ||
868 | If VALUE is a saved register, ADDR says it was saved at a constant | |
869 | offset from the frame base, and SIZE indicates that the whole | |
870 | register was saved, record its offset. */ | |
871 | ||
872 | static void | |
873 | check_for_saved (void *result_untyped, pv_t addr, CORE_ADDR size, | |
874 | pv_t value) | |
875 | { | |
876 | struct rl78_prologue *result = (struct rl78_prologue *) result_untyped; | |
877 | ||
878 | if (value.kind == pvk_register | |
879 | && value.k == 0 | |
880 | && pv_is_register (addr, RL78_SP_REGNUM) | |
f5656ead | 881 | && size == register_size (target_gdbarch (), value.reg)) |
9058f767 KB |
882 | result->reg_offset[value.reg] = addr.k; |
883 | } | |
884 | ||
885 | /* Analyze a prologue starting at START_PC, going no further than | |
886 | LIMIT_PC. Fill in RESULT as appropriate. */ | |
887 | ||
888 | static void | |
889 | rl78_analyze_prologue (CORE_ADDR start_pc, | |
890 | CORE_ADDR limit_pc, struct rl78_prologue *result) | |
891 | { | |
892 | CORE_ADDR pc, next_pc; | |
893 | int rn; | |
894 | pv_t reg[RL78_NUM_TOTAL_REGS]; | |
895 | struct pv_area *stack; | |
896 | struct cleanup *back_to; | |
897 | CORE_ADDR after_last_frame_setup_insn = start_pc; | |
898 | int bank = 0; | |
899 | ||
900 | memset (result, 0, sizeof (*result)); | |
901 | ||
902 | for (rn = 0; rn < RL78_NUM_TOTAL_REGS; rn++) | |
903 | { | |
904 | reg[rn] = pv_register (rn, 0); | |
905 | result->reg_offset[rn] = 1; | |
906 | } | |
907 | ||
f5656ead | 908 | stack = make_pv_area (RL78_SP_REGNUM, gdbarch_addr_bit (target_gdbarch ())); |
9058f767 KB |
909 | back_to = make_cleanup_free_pv_area (stack); |
910 | ||
911 | /* The call instruction has saved the return address on the stack. */ | |
912 | reg[RL78_SP_REGNUM] = pv_add_constant (reg[RL78_SP_REGNUM], -4); | |
913 | pv_area_store (stack, reg[RL78_SP_REGNUM], 4, reg[RL78_PC_REGNUM]); | |
914 | ||
915 | pc = start_pc; | |
916 | while (pc < limit_pc) | |
917 | { | |
918 | int bytes_read; | |
919 | struct rl78_get_opcode_byte_handle opcode_handle; | |
920 | RL78_Opcode_Decoded opc; | |
921 | ||
922 | opcode_handle.pc = pc; | |
923 | bytes_read = rl78_decode_opcode (pc, &opc, rl78_get_opcode_byte, | |
0952813b | 924 | &opcode_handle, RL78_ISA_DEFAULT); |
9058f767 KB |
925 | next_pc = pc + bytes_read; |
926 | ||
927 | if (opc.id == RLO_sel) | |
928 | { | |
929 | bank = opc.op[1].addend; | |
930 | } | |
931 | else if (opc.id == RLO_mov | |
932 | && opc.op[0].type == RL78_Operand_PreDec | |
933 | && opc.op[0].reg == RL78_Reg_SP | |
934 | && opc.op[1].type == RL78_Operand_Register) | |
935 | { | |
936 | int rsrc = (bank * RL78_REGS_PER_BANK) | |
937 | + 2 * (opc.op[1].reg - RL78_Reg_AX); | |
938 | ||
939 | reg[RL78_SP_REGNUM] = pv_add_constant (reg[RL78_SP_REGNUM], -1); | |
940 | pv_area_store (stack, reg[RL78_SP_REGNUM], 1, reg[rsrc]); | |
941 | reg[RL78_SP_REGNUM] = pv_add_constant (reg[RL78_SP_REGNUM], -1); | |
942 | pv_area_store (stack, reg[RL78_SP_REGNUM], 1, reg[rsrc + 1]); | |
943 | after_last_frame_setup_insn = next_pc; | |
944 | } | |
945 | else if (opc.id == RLO_sub | |
946 | && opc.op[0].type == RL78_Operand_Register | |
947 | && opc.op[0].reg == RL78_Reg_SP | |
948 | && opc.op[1].type == RL78_Operand_Immediate) | |
949 | { | |
950 | int addend = opc.op[1].addend; | |
951 | ||
952 | reg[RL78_SP_REGNUM] = pv_add_constant (reg[RL78_SP_REGNUM], | |
953 | -addend); | |
954 | after_last_frame_setup_insn = next_pc; | |
955 | } | |
0bca7f99 KB |
956 | else if (opc.id == RLO_mov |
957 | && opc.size == RL78_Word | |
958 | && opc.op[0].type == RL78_Operand_Register | |
959 | && opc.op[1].type == RL78_Operand_Indirect | |
960 | && opc.op[1].addend == RL78_SP_ADDR) | |
961 | { | |
962 | reg[opc_reg_to_gdb_regnum (opc.op[0].reg)] | |
963 | = reg[RL78_SP_REGNUM]; | |
964 | } | |
965 | else if (opc.id == RLO_sub | |
966 | && opc.size == RL78_Word | |
967 | && opc.op[0].type == RL78_Operand_Register | |
968 | && opc.op[1].type == RL78_Operand_Immediate) | |
969 | { | |
970 | int addend = opc.op[1].addend; | |
971 | int regnum = opc_reg_to_gdb_regnum (opc.op[0].reg); | |
972 | ||
973 | reg[regnum] = pv_add_constant (reg[regnum], -addend); | |
974 | } | |
975 | else if (opc.id == RLO_mov | |
976 | && opc.size == RL78_Word | |
977 | && opc.op[0].type == RL78_Operand_Indirect | |
978 | && opc.op[0].addend == RL78_SP_ADDR | |
979 | && opc.op[1].type == RL78_Operand_Register) | |
980 | { | |
981 | reg[RL78_SP_REGNUM] | |
982 | = reg[opc_reg_to_gdb_regnum (opc.op[1].reg)]; | |
983 | after_last_frame_setup_insn = next_pc; | |
984 | } | |
9058f767 KB |
985 | else |
986 | { | |
987 | /* Terminate the prologue scan. */ | |
988 | break; | |
989 | } | |
990 | ||
991 | pc = next_pc; | |
992 | } | |
993 | ||
994 | /* Is the frame size (offset, really) a known constant? */ | |
995 | if (pv_is_register (reg[RL78_SP_REGNUM], RL78_SP_REGNUM)) | |
996 | result->frame_size = reg[RL78_SP_REGNUM].k; | |
997 | ||
998 | /* Record where all the registers were saved. */ | |
999 | pv_area_scan (stack, check_for_saved, (void *) result); | |
1000 | ||
1001 | result->prologue_end = after_last_frame_setup_insn; | |
1002 | ||
1003 | do_cleanups (back_to); | |
1004 | } | |
1005 | ||
1006 | /* Implement the "addr_bits_remove" gdbarch method. */ | |
1007 | ||
1008 | static CORE_ADDR | |
1009 | rl78_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr) | |
1010 | { | |
1011 | return addr & 0xffffff; | |
1012 | } | |
1013 | ||
1014 | /* Implement the "address_to_pointer" gdbarch method. */ | |
1015 | ||
1016 | static void | |
1017 | rl78_address_to_pointer (struct gdbarch *gdbarch, | |
1018 | struct type *type, gdb_byte *buf, CORE_ADDR addr) | |
1019 | { | |
1020 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1021 | ||
1022 | store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, | |
1023 | addr & 0xffffff); | |
1024 | } | |
1025 | ||
1026 | /* Implement the "pointer_to_address" gdbarch method. */ | |
1027 | ||
1028 | static CORE_ADDR | |
1029 | rl78_pointer_to_address (struct gdbarch *gdbarch, | |
1030 | struct type *type, const gdb_byte *buf) | |
1031 | { | |
1032 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1033 | CORE_ADDR addr | |
1034 | = extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order); | |
1035 | ||
1036 | /* Is it a code address? */ | |
1037 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC | |
1038 | || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD | |
1039 | || TYPE_CODE_SPACE (TYPE_TARGET_TYPE (type)) | |
1040 | || TYPE_LENGTH (type) == 4) | |
1041 | return rl78_make_instruction_address (addr); | |
1042 | else | |
1043 | return rl78_make_data_address (addr); | |
1044 | } | |
1045 | ||
1046 | /* Implement the "skip_prologue" gdbarch method. */ | |
1047 | ||
1048 | static CORE_ADDR | |
1049 | rl78_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) | |
1050 | { | |
e4569f1e | 1051 | const char *name; |
9058f767 KB |
1052 | CORE_ADDR func_addr, func_end; |
1053 | struct rl78_prologue p; | |
1054 | ||
1055 | /* Try to find the extent of the function that contains PC. */ | |
1056 | if (!find_pc_partial_function (pc, &name, &func_addr, &func_end)) | |
1057 | return pc; | |
1058 | ||
1059 | rl78_analyze_prologue (pc, func_end, &p); | |
1060 | return p.prologue_end; | |
1061 | } | |
1062 | ||
1063 | /* Implement the "unwind_pc" gdbarch method. */ | |
1064 | ||
1065 | static CORE_ADDR | |
1066 | rl78_unwind_pc (struct gdbarch *arch, struct frame_info *next_frame) | |
1067 | { | |
1068 | return rl78_addr_bits_remove | |
1069 | (arch, frame_unwind_register_unsigned (next_frame, | |
1070 | RL78_PC_REGNUM)); | |
1071 | } | |
1072 | ||
1073 | /* Implement the "unwind_sp" gdbarch method. */ | |
1074 | ||
1075 | static CORE_ADDR | |
1076 | rl78_unwind_sp (struct gdbarch *arch, struct frame_info *next_frame) | |
1077 | { | |
1078 | return frame_unwind_register_unsigned (next_frame, RL78_SP_REGNUM); | |
1079 | } | |
1080 | ||
1081 | /* Given a frame described by THIS_FRAME, decode the prologue of its | |
1082 | associated function if there is not cache entry as specified by | |
1083 | THIS_PROLOGUE_CACHE. Save the decoded prologue in the cache and | |
1084 | return that struct as the value of this function. */ | |
1085 | ||
1086 | static struct rl78_prologue * | |
1087 | rl78_analyze_frame_prologue (struct frame_info *this_frame, | |
1088 | void **this_prologue_cache) | |
1089 | { | |
1090 | if (!*this_prologue_cache) | |
1091 | { | |
1092 | CORE_ADDR func_start, stop_addr; | |
1093 | ||
1094 | *this_prologue_cache = FRAME_OBSTACK_ZALLOC (struct rl78_prologue); | |
1095 | ||
1096 | func_start = get_frame_func (this_frame); | |
1097 | stop_addr = get_frame_pc (this_frame); | |
1098 | ||
1099 | /* If we couldn't find any function containing the PC, then | |
1100 | just initialize the prologue cache, but don't do anything. */ | |
1101 | if (!func_start) | |
1102 | stop_addr = func_start; | |
1103 | ||
1104 | rl78_analyze_prologue (func_start, stop_addr, *this_prologue_cache); | |
1105 | } | |
1106 | ||
1107 | return *this_prologue_cache; | |
1108 | } | |
1109 | ||
1110 | /* Given a frame and a prologue cache, return this frame's base. */ | |
1111 | ||
1112 | static CORE_ADDR | |
1113 | rl78_frame_base (struct frame_info *this_frame, void **this_prologue_cache) | |
1114 | { | |
1115 | struct rl78_prologue *p | |
1116 | = rl78_analyze_frame_prologue (this_frame, this_prologue_cache); | |
1117 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, RL78_SP_REGNUM); | |
1118 | ||
1119 | return rl78_make_data_address (sp - p->frame_size); | |
1120 | } | |
1121 | ||
1122 | /* Implement the "frame_this_id" method for unwinding frames. */ | |
1123 | ||
1124 | static void | |
1125 | rl78_this_id (struct frame_info *this_frame, | |
1126 | void **this_prologue_cache, struct frame_id *this_id) | |
1127 | { | |
1128 | *this_id = frame_id_build (rl78_frame_base (this_frame, | |
1129 | this_prologue_cache), | |
1130 | get_frame_func (this_frame)); | |
1131 | } | |
1132 | ||
1133 | /* Implement the "frame_prev_register" method for unwinding frames. */ | |
1134 | ||
1135 | static struct value * | |
1136 | rl78_prev_register (struct frame_info *this_frame, | |
1137 | void **this_prologue_cache, int regnum) | |
1138 | { | |
1139 | struct rl78_prologue *p | |
1140 | = rl78_analyze_frame_prologue (this_frame, this_prologue_cache); | |
1141 | CORE_ADDR frame_base = rl78_frame_base (this_frame, this_prologue_cache); | |
1142 | ||
1143 | if (regnum == RL78_SP_REGNUM) | |
1144 | return frame_unwind_got_constant (this_frame, regnum, frame_base); | |
1145 | ||
1146 | else if (regnum == RL78_SPL_REGNUM) | |
1147 | return frame_unwind_got_constant (this_frame, regnum, | |
1148 | (frame_base & 0xff)); | |
1149 | ||
1150 | else if (regnum == RL78_SPH_REGNUM) | |
1151 | return frame_unwind_got_constant (this_frame, regnum, | |
1152 | ((frame_base >> 8) & 0xff)); | |
1153 | ||
1154 | /* If prologue analysis says we saved this register somewhere, | |
1155 | return a description of the stack slot holding it. */ | |
1156 | else if (p->reg_offset[regnum] != 1) | |
1157 | { | |
1158 | struct value *rv = | |
1159 | frame_unwind_got_memory (this_frame, regnum, | |
1160 | frame_base + p->reg_offset[regnum]); | |
1161 | ||
1162 | if (regnum == RL78_PC_REGNUM) | |
1163 | { | |
1164 | ULONGEST pc = rl78_make_instruction_address (value_as_long (rv)); | |
1165 | ||
1166 | return frame_unwind_got_constant (this_frame, regnum, pc); | |
1167 | } | |
1168 | return rv; | |
1169 | } | |
1170 | ||
1171 | /* Otherwise, presume we haven't changed the value of this | |
1172 | register, and get it from the next frame. */ | |
1173 | else | |
1174 | return frame_unwind_got_register (this_frame, regnum, regnum); | |
1175 | } | |
1176 | ||
1177 | static const struct frame_unwind rl78_unwind = | |
1178 | { | |
1179 | NORMAL_FRAME, | |
1180 | default_frame_unwind_stop_reason, | |
1181 | rl78_this_id, | |
1182 | rl78_prev_register, | |
1183 | NULL, | |
1184 | default_frame_sniffer | |
1185 | }; | |
1186 | ||
1187 | /* Implement the "dwarf_reg_to_regnum" gdbarch method. */ | |
1188 | ||
1189 | static int | |
1190 | rl78_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg) | |
1191 | { | |
1192 | if (0 <= reg && reg <= 31) | |
1193 | { | |
1194 | if ((reg & 1) == 0) | |
6d451942 KB |
1195 | /* Map even registers to their 16-bit counterparts which have a |
1196 | pointer type. This is usually what is required from the DWARF | |
1197 | info. */ | |
1198 | return (reg >> 1) + RL78_BANK0_RP0_PTR_REGNUM; | |
9058f767 KB |
1199 | else |
1200 | return reg; | |
1201 | } | |
1202 | else if (reg == 32) | |
1203 | return RL78_SP_REGNUM; | |
1204 | else if (reg == 33) | |
b3ce41ea KB |
1205 | return -1; /* ap */ |
1206 | else if (reg == 34) | |
1207 | return RL78_PSW_REGNUM; | |
1208 | else if (reg == 35) | |
1209 | return RL78_ES_REGNUM; | |
1210 | else if (reg == 36) | |
1211 | return RL78_CS_REGNUM; | |
1212 | else if (reg == 37) | |
9058f767 KB |
1213 | return RL78_PC_REGNUM; |
1214 | else | |
1215 | internal_error (__FILE__, __LINE__, | |
1216 | _("Undefined dwarf2 register mapping of reg %d"), | |
1217 | reg); | |
1218 | } | |
1219 | ||
c47a44f4 KB |
1220 | /* Implement the `register_sim_regno' gdbarch method. */ |
1221 | ||
1222 | static int | |
1223 | rl78_register_sim_regno (struct gdbarch *gdbarch, int regnum) | |
1224 | { | |
1225 | gdb_assert (regnum < RL78_NUM_REGS); | |
1226 | ||
1227 | /* So long as regnum is in [0, RL78_NUM_REGS), it's valid. We | |
1228 | just want to override the default here which disallows register | |
1229 | numbers which have no names. */ | |
1230 | return regnum; | |
1231 | } | |
1232 | ||
9058f767 KB |
1233 | /* Implement the "return_value" gdbarch method. */ |
1234 | ||
1235 | static enum return_value_convention | |
1236 | rl78_return_value (struct gdbarch *gdbarch, | |
6a3a010b | 1237 | struct value *function, |
9058f767 KB |
1238 | struct type *valtype, |
1239 | struct regcache *regcache, | |
1240 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
1241 | { | |
1242 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1243 | ULONGEST valtype_len = TYPE_LENGTH (valtype); | |
bc3c6b36 | 1244 | int is_g10 = gdbarch_tdep (gdbarch)->elf_flags & E_FLAG_RL78_G10; |
9058f767 KB |
1245 | |
1246 | if (valtype_len > 8) | |
1247 | return RETURN_VALUE_STRUCT_CONVENTION; | |
1248 | ||
1249 | if (readbuf) | |
1250 | { | |
1251 | ULONGEST u; | |
c47a44f4 | 1252 | int argreg = RL78_RAW_BANK1_R0_REGNUM; |
bc3c6b36 | 1253 | CORE_ADDR g10_raddr = 0xffec8; |
9058f767 KB |
1254 | int offset = 0; |
1255 | ||
1256 | while (valtype_len > 0) | |
1257 | { | |
bc3c6b36 KB |
1258 | if (is_g10) |
1259 | u = read_memory_integer (g10_raddr, 1, | |
1260 | gdbarch_byte_order (gdbarch)); | |
1261 | else | |
1262 | regcache_cooked_read_unsigned (regcache, argreg, &u); | |
9058f767 KB |
1263 | store_unsigned_integer (readbuf + offset, 1, byte_order, u); |
1264 | valtype_len -= 1; | |
1265 | offset += 1; | |
1266 | argreg++; | |
bc3c6b36 | 1267 | g10_raddr++; |
9058f767 KB |
1268 | } |
1269 | } | |
1270 | ||
1271 | if (writebuf) | |
1272 | { | |
1273 | ULONGEST u; | |
c47a44f4 | 1274 | int argreg = RL78_RAW_BANK1_R0_REGNUM; |
bc3c6b36 | 1275 | CORE_ADDR g10_raddr = 0xffec8; |
9058f767 KB |
1276 | int offset = 0; |
1277 | ||
1278 | while (valtype_len > 0) | |
1279 | { | |
1280 | u = extract_unsigned_integer (writebuf + offset, 1, byte_order); | |
bc3c6b36 KB |
1281 | if (is_g10) { |
1282 | gdb_byte b = u & 0xff; | |
1283 | write_memory (g10_raddr, &b, 1); | |
1284 | } | |
1285 | else | |
1286 | regcache_cooked_write_unsigned (regcache, argreg, u); | |
9058f767 KB |
1287 | valtype_len -= 1; |
1288 | offset += 1; | |
1289 | argreg++; | |
bc3c6b36 | 1290 | g10_raddr++; |
9058f767 KB |
1291 | } |
1292 | } | |
1293 | ||
1294 | return RETURN_VALUE_REGISTER_CONVENTION; | |
1295 | } | |
1296 | ||
1297 | ||
1298 | /* Implement the "frame_align" gdbarch method. */ | |
1299 | ||
1300 | static CORE_ADDR | |
1301 | rl78_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp) | |
1302 | { | |
1303 | return rl78_make_data_address (align_down (sp, 2)); | |
1304 | } | |
1305 | ||
1306 | ||
1307 | /* Implement the "dummy_id" gdbarch method. */ | |
1308 | ||
1309 | static struct frame_id | |
1310 | rl78_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) | |
1311 | { | |
1312 | return | |
1313 | frame_id_build (rl78_make_data_address | |
1314 | (get_frame_register_unsigned | |
1315 | (this_frame, RL78_SP_REGNUM)), | |
1316 | get_frame_pc (this_frame)); | |
1317 | } | |
1318 | ||
1319 | ||
1320 | /* Implement the "push_dummy_call" gdbarch method. */ | |
1321 | ||
1322 | static CORE_ADDR | |
1323 | rl78_push_dummy_call (struct gdbarch *gdbarch, struct value *function, | |
1324 | struct regcache *regcache, CORE_ADDR bp_addr, | |
1325 | int nargs, struct value **args, CORE_ADDR sp, | |
1326 | int struct_return, CORE_ADDR struct_addr) | |
1327 | { | |
1328 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
1329 | gdb_byte buf[4]; | |
1330 | int i; | |
1331 | ||
1332 | /* Push arguments in reverse order. */ | |
1333 | for (i = nargs - 1; i >= 0; i--) | |
1334 | { | |
1335 | struct type *value_type = value_enclosing_type (args[i]); | |
1336 | int len = TYPE_LENGTH (value_type); | |
1337 | int container_len = (len + 1) & ~1; | |
9058f767 KB |
1338 | |
1339 | sp -= container_len; | |
1340 | write_memory (rl78_make_data_address (sp), | |
1341 | value_contents_all (args[i]), len); | |
1342 | } | |
1343 | ||
1344 | /* Store struct value address. */ | |
1345 | if (struct_return) | |
1346 | { | |
1347 | store_unsigned_integer (buf, 2, byte_order, struct_addr); | |
1348 | sp -= 2; | |
1349 | write_memory (rl78_make_data_address (sp), buf, 2); | |
1350 | } | |
1351 | ||
1352 | /* Store return address. */ | |
1353 | sp -= 4; | |
1354 | store_unsigned_integer (buf, 4, byte_order, bp_addr); | |
1355 | write_memory (rl78_make_data_address (sp), buf, 4); | |
1356 | ||
1357 | /* Finally, update the stack pointer... */ | |
1358 | regcache_cooked_write_unsigned (regcache, RL78_SP_REGNUM, sp); | |
1359 | ||
1360 | /* DWARF2/GCC uses the stack address *before* the function call as a | |
1361 | frame's CFA. */ | |
1362 | return rl78_make_data_address (sp + 4); | |
1363 | } | |
1364 | ||
1365 | /* Allocate and initialize a gdbarch object. */ | |
1366 | ||
1367 | static struct gdbarch * | |
1368 | rl78_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
1369 | { | |
1370 | struct gdbarch *gdbarch; | |
1371 | struct gdbarch_tdep *tdep; | |
1372 | int elf_flags; | |
1373 | ||
1374 | /* Extract the elf_flags if available. */ | |
1375 | if (info.abfd != NULL | |
1376 | && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) | |
1377 | elf_flags = elf_elfheader (info.abfd)->e_flags; | |
1378 | else | |
1379 | elf_flags = 0; | |
1380 | ||
1381 | ||
1382 | /* Try to find the architecture in the list of already defined | |
1383 | architectures. */ | |
1384 | for (arches = gdbarch_list_lookup_by_info (arches, &info); | |
1385 | arches != NULL; | |
1386 | arches = gdbarch_list_lookup_by_info (arches->next, &info)) | |
1387 | { | |
1388 | if (gdbarch_tdep (arches->gdbarch)->elf_flags != elf_flags) | |
1389 | continue; | |
1390 | ||
1391 | return arches->gdbarch; | |
1392 | } | |
1393 | ||
1394 | /* None found, create a new architecture from the information | |
1395 | provided. */ | |
1396 | tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); | |
1397 | gdbarch = gdbarch_alloc (&info, tdep); | |
1398 | tdep->elf_flags = elf_flags; | |
1399 | ||
1400 | /* Initialize types. */ | |
1401 | tdep->rl78_void = arch_type (gdbarch, TYPE_CODE_VOID, 1, "void"); | |
1402 | tdep->rl78_uint8 = arch_integer_type (gdbarch, 8, 1, "uint8_t"); | |
1403 | tdep->rl78_int8 = arch_integer_type (gdbarch, 8, 0, "int8_t"); | |
1404 | tdep->rl78_uint16 = arch_integer_type (gdbarch, 16, 1, "uint16_t"); | |
1405 | tdep->rl78_int16 = arch_integer_type (gdbarch, 16, 0, "int16_t"); | |
1406 | tdep->rl78_uint32 = arch_integer_type (gdbarch, 32, 1, "uint32_t"); | |
1407 | tdep->rl78_int32 = arch_integer_type (gdbarch, 32, 0, "int32_t"); | |
1408 | ||
1409 | tdep->rl78_data_pointer | |
1410 | = arch_type (gdbarch, TYPE_CODE_PTR, 16 / TARGET_CHAR_BIT, | |
1411 | xstrdup ("rl78_data_addr_t")); | |
1412 | TYPE_TARGET_TYPE (tdep->rl78_data_pointer) = tdep->rl78_void; | |
1413 | TYPE_UNSIGNED (tdep->rl78_data_pointer) = 1; | |
1414 | ||
1415 | tdep->rl78_code_pointer | |
1416 | = arch_type (gdbarch, TYPE_CODE_PTR, 32 / TARGET_CHAR_BIT, | |
1417 | xstrdup ("rl78_code_addr_t")); | |
1418 | TYPE_TARGET_TYPE (tdep->rl78_code_pointer) = tdep->rl78_void; | |
1419 | TYPE_UNSIGNED (tdep->rl78_code_pointer) = 1; | |
1420 | ||
1421 | /* Registers. */ | |
1422 | set_gdbarch_num_regs (gdbarch, RL78_NUM_REGS); | |
1423 | set_gdbarch_num_pseudo_regs (gdbarch, RL78_NUM_PSEUDO_REGS); | |
bc3c6b36 KB |
1424 | if (tdep->elf_flags & E_FLAG_RL78_G10) |
1425 | set_gdbarch_register_name (gdbarch, rl78_g10_register_name); | |
1426 | else | |
1427 | set_gdbarch_register_name (gdbarch, rl78_register_name); | |
9058f767 KB |
1428 | set_gdbarch_register_type (gdbarch, rl78_register_type); |
1429 | set_gdbarch_pc_regnum (gdbarch, RL78_PC_REGNUM); | |
1430 | set_gdbarch_sp_regnum (gdbarch, RL78_SP_REGNUM); | |
1431 | set_gdbarch_pseudo_register_read (gdbarch, rl78_pseudo_register_read); | |
1432 | set_gdbarch_pseudo_register_write (gdbarch, rl78_pseudo_register_write); | |
1433 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, rl78_dwarf_reg_to_regnum); | |
c47a44f4 KB |
1434 | set_gdbarch_register_reggroup_p (gdbarch, rl78_register_reggroup_p); |
1435 | set_gdbarch_register_sim_regno (gdbarch, rl78_register_sim_regno); | |
9058f767 KB |
1436 | |
1437 | /* Data types. */ | |
1438 | set_gdbarch_char_signed (gdbarch, 0); | |
1439 | set_gdbarch_short_bit (gdbarch, 16); | |
1440 | set_gdbarch_int_bit (gdbarch, 16); | |
1441 | set_gdbarch_long_bit (gdbarch, 32); | |
1442 | set_gdbarch_long_long_bit (gdbarch, 64); | |
1443 | set_gdbarch_ptr_bit (gdbarch, 16); | |
1444 | set_gdbarch_addr_bit (gdbarch, 32); | |
b3ce41ea | 1445 | set_gdbarch_dwarf2_addr_size (gdbarch, 4); |
9058f767 KB |
1446 | set_gdbarch_float_bit (gdbarch, 32); |
1447 | set_gdbarch_float_format (gdbarch, floatformats_ieee_single); | |
1448 | set_gdbarch_double_bit (gdbarch, 32); | |
1449 | set_gdbarch_long_double_bit (gdbarch, 64); | |
1450 | set_gdbarch_double_format (gdbarch, floatformats_ieee_single); | |
1451 | set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double); | |
1452 | set_gdbarch_pointer_to_address (gdbarch, rl78_pointer_to_address); | |
1453 | set_gdbarch_address_to_pointer (gdbarch, rl78_address_to_pointer); | |
1454 | set_gdbarch_addr_bits_remove (gdbarch, rl78_addr_bits_remove); | |
1455 | ||
1456 | /* Breakpoints. */ | |
1457 | set_gdbarch_breakpoint_from_pc (gdbarch, rl78_breakpoint_from_pc); | |
1458 | set_gdbarch_decr_pc_after_break (gdbarch, 1); | |
1459 | ||
1460 | /* Disassembly. */ | |
1461 | set_gdbarch_print_insn (gdbarch, print_insn_rl78); | |
1462 | ||
1463 | /* Frames, prologues, etc. */ | |
1464 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
1465 | set_gdbarch_skip_prologue (gdbarch, rl78_skip_prologue); | |
1466 | set_gdbarch_unwind_pc (gdbarch, rl78_unwind_pc); | |
1467 | set_gdbarch_unwind_sp (gdbarch, rl78_unwind_sp); | |
1468 | set_gdbarch_frame_align (gdbarch, rl78_frame_align); | |
b3ce41ea KB |
1469 | |
1470 | dwarf2_append_unwinders (gdbarch); | |
9058f767 KB |
1471 | frame_unwind_append_unwinder (gdbarch, &rl78_unwind); |
1472 | ||
1473 | /* Dummy frames, return values. */ | |
1474 | set_gdbarch_dummy_id (gdbarch, rl78_dummy_id); | |
1475 | set_gdbarch_push_dummy_call (gdbarch, rl78_push_dummy_call); | |
1476 | set_gdbarch_return_value (gdbarch, rl78_return_value); | |
1477 | ||
1478 | /* Virtual tables. */ | |
1479 | set_gdbarch_vbit_in_delta (gdbarch, 1); | |
1480 | ||
1481 | return gdbarch; | |
1482 | } | |
1483 | ||
693be288 JK |
1484 | /* -Wmissing-prototypes */ |
1485 | extern initialize_file_ftype _initialize_rl78_tdep; | |
1486 | ||
9058f767 KB |
1487 | /* Register the above initialization routine. */ |
1488 | ||
1489 | void | |
1490 | _initialize_rl78_tdep (void) | |
1491 | { | |
1492 | register_gdbarch_init (bfd_arch_rl78, rl78_gdbarch_init); | |
1493 | } |