Commit | Line | Data |
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d7066cce AG |
1 | /* Target-dependent code for Moxie. |
2 | ||
28e7fd62 | 3 | Copyright (C) 2009-2013 Free Software Foundation, Inc. |
d7066cce AG |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program 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 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "frame.h" | |
22 | #include "frame-unwind.h" | |
23 | #include "frame-base.h" | |
24 | #include "symtab.h" | |
25 | #include "gdbtypes.h" | |
26 | #include "gdbcmd.h" | |
27 | #include "gdbcore.h" | |
28 | #include "gdb_string.h" | |
29 | #include "value.h" | |
30 | #include "inferior.h" | |
31 | #include "symfile.h" | |
32 | #include "objfiles.h" | |
33 | #include "osabi.h" | |
34 | #include "language.h" | |
35 | #include "arch-utils.h" | |
36 | #include "regcache.h" | |
37 | #include "trad-frame.h" | |
38 | #include "dis-asm.h" | |
451fa05e | 39 | #include "record.h" |
d02ed0bb | 40 | #include "record-full.h" |
d7066cce AG |
41 | |
42 | #include "gdb_assert.h" | |
43 | ||
44 | #include "moxie-tdep.h" | |
45 | ||
46 | /* Local functions. */ | |
47 | ||
48 | extern void _initialize_moxie_tdep (void); | |
49 | ||
50 | /* Use an invalid address value as 'not available' marker. */ | |
51 | enum { REG_UNAVAIL = (CORE_ADDR) -1 }; | |
52 | ||
53 | struct moxie_frame_cache | |
54 | { | |
55 | /* Base address. */ | |
56 | CORE_ADDR base; | |
57 | CORE_ADDR pc; | |
58 | LONGEST framesize; | |
59 | CORE_ADDR saved_regs[MOXIE_NUM_REGS]; | |
60 | CORE_ADDR saved_sp; | |
61 | }; | |
62 | ||
63 | /* Implement the "frame_align" gdbarch method. */ | |
64 | ||
65 | static CORE_ADDR | |
66 | moxie_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp) | |
67 | { | |
68 | /* Align to the size of an instruction (so that they can safely be | |
69 | pushed onto the stack. */ | |
70 | return sp & ~1; | |
71 | } | |
72 | ||
73 | /* Implement the "breakpoint_from_pc" gdbarch method. */ | |
74 | ||
44d100c3 | 75 | static const unsigned char * |
451fa05e | 76 | moxie_breakpoint_from_pc (struct gdbarch *gdbarch, |
d7066cce AG |
77 | CORE_ADDR *pcptr, int *lenptr) |
78 | { | |
79 | static unsigned char breakpoint[] = { 0x35, 0x00 }; | |
80 | ||
81 | *lenptr = sizeof (breakpoint); | |
82 | return breakpoint; | |
83 | } | |
84 | ||
85 | /* Moxie register names. */ | |
86 | ||
87 | char *moxie_register_names[] = { | |
88 | "$fp", "$sp", "$r0", "$r1", "$r2", | |
89 | "$r3", "$r4", "$r5", "$r6", "$r7", | |
90 | "$r8", "$r9", "$r10", "$r11", "$r12", | |
91 | "$r13", "$pc", "$cc" }; | |
92 | ||
93 | /* Implement the "register_name" gdbarch method. */ | |
94 | ||
95 | static const char * | |
96 | moxie_register_name (struct gdbarch *gdbarch, int reg_nr) | |
97 | { | |
98 | if (reg_nr < 0) | |
99 | return NULL; | |
100 | if (reg_nr >= MOXIE_NUM_REGS) | |
101 | return NULL; | |
102 | return moxie_register_names[reg_nr]; | |
103 | } | |
104 | ||
105 | /* Implement the "register_type" gdbarch method. */ | |
106 | ||
107 | static struct type * | |
108 | moxie_register_type (struct gdbarch *gdbarch, int reg_nr) | |
109 | { | |
110 | if (reg_nr == MOXIE_PC_REGNUM) | |
111 | return builtin_type (gdbarch)->builtin_func_ptr; | |
112 | else if (reg_nr == MOXIE_SP_REGNUM || reg_nr == MOXIE_FP_REGNUM) | |
113 | return builtin_type (gdbarch)->builtin_data_ptr; | |
114 | else | |
df4df182 | 115 | return builtin_type (gdbarch)->builtin_int32; |
d7066cce AG |
116 | } |
117 | ||
118 | /* Write into appropriate registers a function return value | |
119 | of type TYPE, given in virtual format. */ | |
120 | ||
121 | static void | |
122 | moxie_store_return_value (struct type *type, struct regcache *regcache, | |
123 | const void *valbuf) | |
124 | { | |
e17a4113 UW |
125 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
126 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d7066cce AG |
127 | CORE_ADDR regval; |
128 | int len = TYPE_LENGTH (type); | |
129 | ||
130 | /* Things always get returned in RET1_REGNUM, RET2_REGNUM. */ | |
e17a4113 | 131 | regval = extract_unsigned_integer (valbuf, len > 4 ? 4 : len, byte_order); |
d7066cce AG |
132 | regcache_cooked_write_unsigned (regcache, RET1_REGNUM, regval); |
133 | if (len > 4) | |
134 | { | |
e17a4113 UW |
135 | regval = extract_unsigned_integer ((gdb_byte *) valbuf + 4, |
136 | len - 4, byte_order); | |
d7066cce AG |
137 | regcache_cooked_write_unsigned (regcache, RET1_REGNUM + 1, regval); |
138 | } | |
139 | } | |
140 | ||
141 | /* Decode the instructions within the given address range. Decide | |
142 | when we must have reached the end of the function prologue. If a | |
143 | frame_info pointer is provided, fill in its saved_regs etc. | |
144 | ||
145 | Returns the address of the first instruction after the prologue. */ | |
146 | ||
147 | static CORE_ADDR | |
148 | moxie_analyze_prologue (CORE_ADDR start_addr, CORE_ADDR end_addr, | |
99f75275 AG |
149 | struct moxie_frame_cache *cache, |
150 | struct gdbarch *gdbarch) | |
d7066cce | 151 | { |
e17a4113 | 152 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
d7066cce AG |
153 | CORE_ADDR next_addr; |
154 | ULONGEST inst, inst2; | |
155 | LONGEST offset; | |
156 | int regnum; | |
157 | ||
158 | /* Record where the jsra instruction saves the PC and FP. */ | |
159 | cache->saved_regs[MOXIE_PC_REGNUM] = -4; | |
160 | cache->saved_regs[MOXIE_FP_REGNUM] = 0; | |
161 | cache->framesize = 0; | |
162 | ||
163 | if (start_addr >= end_addr) | |
164 | return end_addr; | |
165 | ||
166 | for (next_addr = start_addr; next_addr < end_addr; ) | |
167 | { | |
e17a4113 | 168 | inst = read_memory_unsigned_integer (next_addr, 2, byte_order); |
d7066cce | 169 | |
5152ff90 AG |
170 | /* Match "push $sp $rN" where N is between 0 and 13 inclusive. */ |
171 | if (inst >= 0x0612 && inst <= 0x061f) | |
d7066cce AG |
172 | { |
173 | regnum = inst & 0x000f; | |
174 | cache->framesize += 4; | |
175 | cache->saved_regs[regnum] = cache->framesize; | |
176 | next_addr += 2; | |
177 | } | |
4ee73e90 AG |
178 | else |
179 | break; | |
ce0bf488 | 180 | } |
d7066cce | 181 | |
ce0bf488 | 182 | inst = read_memory_unsigned_integer (next_addr, 2, byte_order); |
d7066cce | 183 | |
ce0bf488 AG |
184 | /* Optional stack allocation for args and local vars <= 4 |
185 | byte. */ | |
5152ff90 | 186 | if (inst == 0x01e0) /* ldi.l $r12, X */ |
ce0bf488 AG |
187 | { |
188 | offset = read_memory_integer (next_addr + 2, 4, byte_order); | |
189 | inst2 = read_memory_unsigned_integer (next_addr + 6, 2, byte_order); | |
190 | ||
5152ff90 | 191 | if (inst2 == 0x291e) /* sub.l $sp, $r12 */ |
ce0bf488 AG |
192 | { |
193 | cache->framesize += offset; | |
194 | } | |
195 | ||
196 | return (next_addr + 8); | |
197 | } | |
5152ff90 | 198 | else if ((inst & 0xff00) == 0x9100) /* dec $sp, X */ |
ce0bf488 AG |
199 | { |
200 | cache->framesize += (inst & 0x00ff); | |
201 | next_addr += 2; | |
d7066cce | 202 | |
ce0bf488 AG |
203 | while (next_addr < end_addr) |
204 | { | |
205 | inst = read_memory_unsigned_integer (next_addr, 2, byte_order); | |
5152ff90 | 206 | if ((inst & 0xff00) != 0x9100) /* no more dec $sp, X */ |
ce0bf488 AG |
207 | break; |
208 | cache->framesize += (inst & 0x00ff); | |
209 | next_addr += 2; | |
d7066cce | 210 | } |
d7066cce AG |
211 | } |
212 | ||
213 | return next_addr; | |
214 | } | |
215 | ||
216 | /* Find the end of function prologue. */ | |
217 | ||
218 | static CORE_ADDR | |
219 | moxie_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) | |
220 | { | |
221 | CORE_ADDR func_addr = 0, func_end = 0; | |
2c02bd72 | 222 | const char *func_name; |
d7066cce AG |
223 | |
224 | /* See if we can determine the end of the prologue via the symbol table. | |
225 | If so, then return either PC, or the PC after the prologue, whichever | |
226 | is greater. */ | |
227 | if (find_pc_partial_function (pc, &func_name, &func_addr, &func_end)) | |
228 | { | |
d80b854b UW |
229 | CORE_ADDR post_prologue_pc |
230 | = skip_prologue_using_sal (gdbarch, func_addr); | |
d7066cce AG |
231 | if (post_prologue_pc != 0) |
232 | return max (pc, post_prologue_pc); | |
233 | else | |
234 | { | |
235 | /* Can't determine prologue from the symbol table, need to examine | |
236 | instructions. */ | |
237 | struct symtab_and_line sal; | |
238 | struct symbol *sym; | |
239 | struct moxie_frame_cache cache; | |
240 | CORE_ADDR plg_end; | |
241 | ||
242 | memset (&cache, 0, sizeof cache); | |
243 | ||
244 | plg_end = moxie_analyze_prologue (func_addr, | |
99f75275 | 245 | func_end, &cache, gdbarch); |
d7066cce AG |
246 | /* Found a function. */ |
247 | sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL); | |
248 | /* Don't use line number debug info for assembly source | |
025bb325 | 249 | files. */ |
d7066cce AG |
250 | if (sym && SYMBOL_LANGUAGE (sym) != language_asm) |
251 | { | |
252 | sal = find_pc_line (func_addr, 0); | |
253 | if (sal.end && sal.end < func_end) | |
254 | { | |
255 | /* Found a line number, use it as end of | |
256 | prologue. */ | |
257 | return sal.end; | |
258 | } | |
259 | } | |
260 | /* No useable line symbol. Use result of prologue parsing | |
261 | method. */ | |
262 | return plg_end; | |
263 | } | |
264 | } | |
265 | ||
266 | /* No function symbol -- just return the PC. */ | |
267 | return (CORE_ADDR) pc; | |
268 | } | |
269 | ||
270 | struct moxie_unwind_cache | |
271 | { | |
272 | /* The previous frame's inner most stack address. Used as this | |
273 | frame ID's stack_addr. */ | |
274 | CORE_ADDR prev_sp; | |
275 | /* The frame's base, optionally used by the high-level debug info. */ | |
276 | CORE_ADDR base; | |
277 | int size; | |
278 | /* How far the SP and r13 (FP) have been offset from the start of | |
279 | the stack frame (as defined by the previous frame's stack | |
280 | pointer). */ | |
281 | LONGEST sp_offset; | |
282 | LONGEST r13_offset; | |
283 | int uses_frame; | |
284 | /* Table indicating the location of each and every register. */ | |
285 | struct trad_frame_saved_reg *saved_regs; | |
286 | }; | |
287 | ||
288 | /* Implement the "read_pc" gdbarch method. */ | |
289 | ||
290 | static CORE_ADDR | |
291 | moxie_read_pc (struct regcache *regcache) | |
292 | { | |
293 | ULONGEST pc; | |
294 | ||
295 | regcache_cooked_read_unsigned (regcache, MOXIE_PC_REGNUM, &pc); | |
296 | return pc; | |
297 | } | |
298 | ||
299 | /* Implement the "write_pc" gdbarch method. */ | |
300 | ||
301 | static void | |
302 | moxie_write_pc (struct regcache *regcache, CORE_ADDR val) | |
303 | { | |
304 | regcache_cooked_write_unsigned (regcache, MOXIE_PC_REGNUM, val); | |
305 | } | |
306 | ||
451fa05e | 307 | /* Implement the "unwind_sp" gdbarch method. */ |
d7066cce AG |
308 | |
309 | static CORE_ADDR | |
310 | moxie_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
311 | { | |
312 | return frame_unwind_register_unsigned (next_frame, MOXIE_SP_REGNUM); | |
313 | } | |
314 | ||
315 | /* Given a return value in `regbuf' with a type `valtype', | |
316 | extract and copy its value into `valbuf'. */ | |
317 | ||
318 | static void | |
319 | moxie_extract_return_value (struct type *type, struct regcache *regcache, | |
320 | void *dst) | |
321 | { | |
e17a4113 UW |
322 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
323 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
d7066cce AG |
324 | bfd_byte *valbuf = dst; |
325 | int len = TYPE_LENGTH (type); | |
326 | ULONGEST tmp; | |
327 | ||
328 | /* By using store_unsigned_integer we avoid having to do | |
329 | anything special for small big-endian values. */ | |
330 | regcache_cooked_read_unsigned (regcache, RET1_REGNUM, &tmp); | |
e17a4113 | 331 | store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), byte_order, tmp); |
d7066cce AG |
332 | |
333 | /* Ignore return values more than 8 bytes in size because the moxie | |
334 | returns anything more than 8 bytes in the stack. */ | |
335 | if (len > 4) | |
336 | { | |
337 | regcache_cooked_read_unsigned (regcache, RET1_REGNUM + 1, &tmp); | |
e17a4113 | 338 | store_unsigned_integer (valbuf + len - 4, 4, byte_order, tmp); |
d7066cce AG |
339 | } |
340 | } | |
341 | ||
342 | /* Implement the "return_value" gdbarch method. */ | |
343 | ||
344 | static enum return_value_convention | |
6a3a010b | 345 | moxie_return_value (struct gdbarch *gdbarch, struct value *function, |
d7066cce AG |
346 | struct type *valtype, struct regcache *regcache, |
347 | gdb_byte *readbuf, const gdb_byte *writebuf) | |
348 | { | |
349 | if (TYPE_LENGTH (valtype) > 8) | |
350 | return RETURN_VALUE_STRUCT_CONVENTION; | |
351 | else | |
352 | { | |
353 | if (readbuf != NULL) | |
354 | moxie_extract_return_value (valtype, regcache, readbuf); | |
355 | if (writebuf != NULL) | |
356 | moxie_store_return_value (valtype, regcache, writebuf); | |
357 | return RETURN_VALUE_REGISTER_CONVENTION; | |
358 | } | |
359 | } | |
360 | ||
361 | /* Allocate and initialize a moxie_frame_cache object. */ | |
362 | ||
363 | static struct moxie_frame_cache * | |
364 | moxie_alloc_frame_cache (void) | |
365 | { | |
366 | struct moxie_frame_cache *cache; | |
367 | int i; | |
368 | ||
369 | cache = FRAME_OBSTACK_ZALLOC (struct moxie_frame_cache); | |
370 | ||
371 | cache->base = 0; | |
372 | cache->saved_sp = 0; | |
373 | cache->pc = 0; | |
374 | cache->framesize = 0; | |
375 | for (i = 0; i < MOXIE_NUM_REGS; ++i) | |
376 | cache->saved_regs[i] = REG_UNAVAIL; | |
377 | ||
378 | return cache; | |
379 | } | |
380 | ||
381 | /* Populate a moxie_frame_cache object for this_frame. */ | |
382 | ||
383 | static struct moxie_frame_cache * | |
384 | moxie_frame_cache (struct frame_info *this_frame, void **this_cache) | |
385 | { | |
386 | struct moxie_frame_cache *cache; | |
387 | CORE_ADDR current_pc; | |
388 | int i; | |
389 | ||
390 | if (*this_cache) | |
391 | return *this_cache; | |
392 | ||
393 | cache = moxie_alloc_frame_cache (); | |
394 | *this_cache = cache; | |
395 | ||
396 | cache->base = get_frame_register_unsigned (this_frame, MOXIE_FP_REGNUM); | |
397 | if (cache->base == 0) | |
398 | return cache; | |
399 | ||
400 | cache->pc = get_frame_func (this_frame); | |
401 | current_pc = get_frame_pc (this_frame); | |
402 | if (cache->pc) | |
99f75275 AG |
403 | { |
404 | struct gdbarch *gdbarch = get_frame_arch (this_frame); | |
405 | moxie_analyze_prologue (cache->pc, current_pc, cache, gdbarch); | |
406 | } | |
d7066cce AG |
407 | |
408 | cache->saved_sp = cache->base - cache->framesize; | |
409 | ||
410 | for (i = 0; i < MOXIE_NUM_REGS; ++i) | |
411 | if (cache->saved_regs[i] != REG_UNAVAIL) | |
412 | cache->saved_regs[i] = cache->base - cache->saved_regs[i]; | |
413 | ||
414 | return cache; | |
415 | } | |
416 | ||
417 | /* Implement the "unwind_pc" gdbarch method. */ | |
418 | ||
419 | static CORE_ADDR | |
420 | moxie_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) | |
421 | { | |
422 | return frame_unwind_register_unsigned (next_frame, MOXIE_PC_REGNUM); | |
423 | } | |
424 | ||
425 | /* Given a GDB frame, determine the address of the calling function's | |
426 | frame. This will be used to create a new GDB frame struct. */ | |
427 | ||
428 | static void | |
429 | moxie_frame_this_id (struct frame_info *this_frame, | |
430 | void **this_prologue_cache, struct frame_id *this_id) | |
431 | { | |
432 | struct moxie_frame_cache *cache = moxie_frame_cache (this_frame, | |
433 | this_prologue_cache); | |
434 | ||
435 | /* This marks the outermost frame. */ | |
436 | if (cache->base == 0) | |
437 | return; | |
438 | ||
439 | *this_id = frame_id_build (cache->saved_sp, cache->pc); | |
440 | } | |
441 | ||
442 | /* Get the value of register regnum in the previous stack frame. */ | |
443 | ||
444 | static struct value * | |
445 | moxie_frame_prev_register (struct frame_info *this_frame, | |
446 | void **this_prologue_cache, int regnum) | |
447 | { | |
448 | struct moxie_frame_cache *cache = moxie_frame_cache (this_frame, | |
449 | this_prologue_cache); | |
450 | ||
451 | gdb_assert (regnum >= 0); | |
452 | ||
453 | if (regnum == MOXIE_SP_REGNUM && cache->saved_sp) | |
454 | return frame_unwind_got_constant (this_frame, regnum, cache->saved_sp); | |
455 | ||
456 | if (regnum < MOXIE_NUM_REGS && cache->saved_regs[regnum] != REG_UNAVAIL) | |
457 | return frame_unwind_got_memory (this_frame, regnum, | |
458 | cache->saved_regs[regnum]); | |
459 | ||
460 | return frame_unwind_got_register (this_frame, regnum, regnum); | |
461 | } | |
462 | ||
463 | static const struct frame_unwind moxie_frame_unwind = { | |
464 | NORMAL_FRAME, | |
8fbca658 | 465 | default_frame_unwind_stop_reason, |
d7066cce AG |
466 | moxie_frame_this_id, |
467 | moxie_frame_prev_register, | |
468 | NULL, | |
469 | default_frame_sniffer | |
470 | }; | |
471 | ||
472 | /* Return the base address of this_frame. */ | |
473 | ||
474 | static CORE_ADDR | |
475 | moxie_frame_base_address (struct frame_info *this_frame, void **this_cache) | |
476 | { | |
477 | struct moxie_frame_cache *cache = moxie_frame_cache (this_frame, | |
478 | this_cache); | |
479 | ||
480 | return cache->base; | |
481 | } | |
482 | ||
483 | static const struct frame_base moxie_frame_base = { | |
484 | &moxie_frame_unwind, | |
485 | moxie_frame_base_address, | |
486 | moxie_frame_base_address, | |
487 | moxie_frame_base_address | |
488 | }; | |
489 | ||
490 | static struct frame_id | |
491 | moxie_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) | |
492 | { | |
493 | CORE_ADDR sp = get_frame_register_unsigned (this_frame, MOXIE_SP_REGNUM); | |
494 | ||
495 | return frame_id_build (sp, get_frame_pc (this_frame)); | |
496 | } | |
497 | ||
451fa05e AG |
498 | /* Read an unsigned integer from the inferior, and adjust |
499 | endianess. */ | |
500 | static ULONGEST | |
948f8e3d | 501 | moxie_process_readu (CORE_ADDR addr, gdb_byte *buf, |
451fa05e AG |
502 | int length, enum bfd_endian byte_order) |
503 | { | |
504 | if (target_read_memory (addr, buf, length)) | |
505 | { | |
506 | if (record_debug) | |
507 | printf_unfiltered (_("Process record: error reading memory at " | |
508 | "addr 0x%s len = %d.\n"), | |
f5656ead | 509 | paddress (target_gdbarch (), addr), length); |
451fa05e AG |
510 | return -1; |
511 | } | |
512 | ||
513 | return extract_unsigned_integer (buf, length, byte_order); | |
514 | } | |
515 | ||
516 | /* Parse the current instruction and record the values of the registers and | |
517 | memory that will be changed in current instruction to "record_arch_list". | |
025bb325 | 518 | Return -1 if something wrong. */ |
451fa05e | 519 | |
693be288 | 520 | static int |
451fa05e AG |
521 | moxie_process_record (struct gdbarch *gdbarch, struct regcache *regcache, |
522 | CORE_ADDR addr) | |
523 | { | |
524 | gdb_byte buf[4]; | |
525 | uint16_t inst; | |
526 | uint32_t tmpu32; | |
527 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
528 | ||
529 | if (record_debug > 1) | |
530 | fprintf_unfiltered (gdb_stdlog, "Process record: moxie_process_record " | |
531 | "addr = 0x%s\n", | |
f5656ead | 532 | paddress (target_gdbarch (), addr)); |
451fa05e AG |
533 | |
534 | inst = (uint16_t) moxie_process_readu (addr, buf, 2, byte_order); | |
535 | ||
536 | /* Decode instruction. */ | |
537 | if (inst & (1 << 15)) | |
538 | { | |
539 | if (inst & (1 << 14)) | |
540 | { | |
541 | /* This is a Form 3 instruction. */ | |
542 | int opcode = (inst >> 10 & 0xf); | |
543 | ||
544 | switch (opcode) | |
545 | { | |
546 | case 0x00: /* beq */ | |
547 | case 0x01: /* bne */ | |
548 | case 0x02: /* blt */ | |
549 | case 0x03: /* bgt */ | |
550 | case 0x04: /* bltu */ | |
551 | case 0x05: /* bgtu */ | |
552 | case 0x06: /* bge */ | |
553 | case 0x07: /* ble */ | |
554 | case 0x08: /* bgeu */ | |
555 | case 0x09: /* bleu */ | |
556 | /* Do nothing. */ | |
557 | break; | |
558 | default: | |
559 | { | |
560 | /* Do nothing. */ | |
561 | break; | |
562 | } | |
563 | } | |
564 | } | |
565 | else | |
566 | { | |
567 | /* This is a Form 2 instruction. */ | |
568 | int opcode = (inst >> 12 & 0x3); | |
569 | switch (opcode) | |
570 | { | |
571 | case 0x00: /* inc */ | |
572 | case 0x01: /* dec */ | |
573 | case 0x02: /* gsr */ | |
574 | { | |
575 | int reg = (inst >> 8) & 0xf; | |
25ea693b | 576 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
577 | return -1; |
578 | } | |
579 | break; | |
580 | case 0x03: /* ssr */ | |
581 | { | |
582 | /* Do nothing until GDB learns about moxie's special | |
583 | registers. */ | |
584 | } | |
585 | break; | |
586 | default: | |
587 | /* Do nothing. */ | |
588 | break; | |
589 | } | |
590 | } | |
591 | } | |
592 | else | |
593 | { | |
594 | /* This is a Form 1 instruction. */ | |
595 | int opcode = inst >> 8; | |
596 | ||
597 | switch (opcode) | |
598 | { | |
599 | case 0x00: /* nop */ | |
600 | /* Do nothing. */ | |
601 | break; | |
602 | case 0x01: /* ldi.l (immediate) */ | |
603 | case 0x02: /* mov (register-to-register) */ | |
604 | { | |
605 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 606 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
607 | return -1; |
608 | } | |
609 | break; | |
610 | case 0x03: /* jsra */ | |
611 | { | |
612 | regcache_raw_read (regcache, | |
613 | MOXIE_SP_REGNUM, (gdb_byte *) & tmpu32); | |
614 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
615 | 4, byte_order); | |
25ea693b MM |
616 | if (record_full_arch_list_add_reg (regcache, MOXIE_FP_REGNUM) |
617 | || (record_full_arch_list_add_reg (regcache, | |
618 | MOXIE_SP_REGNUM)) | |
619 | || record_full_arch_list_add_mem (tmpu32 - 12, 12)) | |
451fa05e AG |
620 | return -1; |
621 | } | |
622 | break; | |
623 | case 0x04: /* ret */ | |
624 | { | |
25ea693b MM |
625 | if (record_full_arch_list_add_reg (regcache, MOXIE_FP_REGNUM) |
626 | || (record_full_arch_list_add_reg (regcache, | |
627 | MOXIE_SP_REGNUM))) | |
451fa05e AG |
628 | return -1; |
629 | } | |
630 | break; | |
631 | case 0x05: /* add.l */ | |
632 | { | |
633 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 634 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
635 | return -1; |
636 | } | |
637 | break; | |
638 | case 0x06: /* push */ | |
639 | { | |
640 | int reg = (inst >> 4) & 0xf; | |
641 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
642 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
643 | 4, byte_order); | |
25ea693b MM |
644 | if (record_full_arch_list_add_reg (regcache, reg) |
645 | || record_full_arch_list_add_mem (tmpu32 - 4, 4)) | |
451fa05e AG |
646 | return -1; |
647 | } | |
648 | break; | |
649 | case 0x07: /* pop */ | |
650 | { | |
651 | int a = (inst >> 4) & 0xf; | |
652 | int b = inst & 0xf; | |
25ea693b MM |
653 | if (record_full_arch_list_add_reg (regcache, a) |
654 | || record_full_arch_list_add_reg (regcache, b)) | |
451fa05e AG |
655 | return -1; |
656 | } | |
657 | break; | |
658 | case 0x08: /* lda.l */ | |
659 | { | |
660 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 661 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
662 | return -1; |
663 | } | |
664 | break; | |
665 | case 0x09: /* sta.l */ | |
666 | { | |
667 | tmpu32 = (uint32_t) moxie_process_readu (addr+2, buf, | |
668 | 4, byte_order); | |
25ea693b | 669 | if (record_full_arch_list_add_mem (tmpu32, 4)) |
451fa05e AG |
670 | return -1; |
671 | } | |
672 | break; | |
673 | case 0x0a: /* ld.l (register indirect) */ | |
674 | { | |
675 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 676 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
677 | return -1; |
678 | } | |
679 | break; | |
680 | case 0x0b: /* st.l */ | |
681 | { | |
682 | int reg = (inst >> 4) & 0xf; | |
683 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
684 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
685 | 4, byte_order); | |
25ea693b | 686 | if (record_full_arch_list_add_mem (tmpu32, 4)) |
451fa05e AG |
687 | return -1; |
688 | } | |
689 | break; | |
690 | case 0x0c: /* ldo.l */ | |
691 | { | |
692 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 693 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
694 | return -1; |
695 | } | |
696 | break; | |
697 | case 0x0d: /* sto.l */ | |
698 | { | |
699 | int reg = (inst >> 4) & 0xf; | |
700 | uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4, | |
701 | byte_order); | |
702 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
703 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
704 | 4, byte_order); | |
705 | tmpu32 += offset; | |
25ea693b | 706 | if (record_full_arch_list_add_mem (tmpu32, 4)) |
451fa05e AG |
707 | return -1; |
708 | } | |
709 | break; | |
710 | case 0x0e: /* cmp */ | |
711 | { | |
25ea693b | 712 | if (record_full_arch_list_add_reg (regcache, MOXIE_CC_REGNUM)) |
451fa05e AG |
713 | return -1; |
714 | } | |
715 | break; | |
716 | case 0x0f: | |
717 | case 0x10: | |
718 | case 0x11: | |
719 | case 0x12: | |
720 | case 0x13: | |
721 | case 0x14: | |
722 | case 0x15: | |
723 | case 0x16: | |
724 | case 0x17: | |
725 | case 0x18: | |
726 | { | |
727 | /* Do nothing. */ | |
728 | break; | |
729 | } | |
730 | case 0x19: /* jsr */ | |
731 | { | |
732 | regcache_raw_read (regcache, | |
733 | MOXIE_SP_REGNUM, (gdb_byte *) & tmpu32); | |
734 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
735 | 4, byte_order); | |
25ea693b MM |
736 | if (record_full_arch_list_add_reg (regcache, MOXIE_FP_REGNUM) |
737 | || (record_full_arch_list_add_reg (regcache, | |
738 | MOXIE_SP_REGNUM)) | |
739 | || record_full_arch_list_add_mem (tmpu32 - 12, 12)) | |
451fa05e AG |
740 | return -1; |
741 | } | |
742 | break; | |
743 | case 0x1a: /* jmpa */ | |
744 | { | |
745 | /* Do nothing. */ | |
746 | } | |
747 | break; | |
748 | case 0x1b: /* ldi.b (immediate) */ | |
749 | case 0x1c: /* ld.b (register indirect) */ | |
750 | case 0x1d: /* lda.b */ | |
751 | { | |
752 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 753 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
754 | return -1; |
755 | } | |
756 | break; | |
757 | case 0x1e: /* st.b */ | |
758 | { | |
759 | int reg = (inst >> 4) & 0xf; | |
760 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
761 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
762 | 4, byte_order); | |
25ea693b | 763 | if (record_full_arch_list_add_mem (tmpu32, 1)) |
451fa05e AG |
764 | return -1; |
765 | } | |
766 | break; | |
767 | case 0x1f: /* sta.b */ | |
768 | { | |
948f8e3d | 769 | tmpu32 = moxie_process_readu (addr+2, buf, 4, byte_order); |
25ea693b | 770 | if (record_full_arch_list_add_mem (tmpu32, 1)) |
451fa05e AG |
771 | return -1; |
772 | } | |
773 | break; | |
774 | case 0x20: /* ldi.s (immediate) */ | |
775 | case 0x21: /* ld.s (register indirect) */ | |
776 | case 0x22: /* lda.s */ | |
777 | { | |
778 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 779 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
780 | return -1; |
781 | } | |
782 | break; | |
783 | case 0x23: /* st.s */ | |
784 | { | |
785 | int reg = (inst >> 4) & 0xf; | |
786 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
787 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
788 | 4, byte_order); | |
25ea693b | 789 | if (record_full_arch_list_add_mem (tmpu32, 2)) |
451fa05e AG |
790 | return -1; |
791 | } | |
792 | break; | |
793 | case 0x24: /* sta.s */ | |
794 | { | |
948f8e3d | 795 | tmpu32 = moxie_process_readu (addr+2, buf, 4, byte_order); |
25ea693b | 796 | if (record_full_arch_list_add_mem (tmpu32, 2)) |
451fa05e AG |
797 | return -1; |
798 | } | |
799 | break; | |
800 | case 0x25: /* jmp */ | |
801 | { | |
802 | /* Do nothing. */ | |
803 | } | |
804 | break; | |
805 | case 0x26: /* and */ | |
806 | case 0x27: /* lshr */ | |
807 | case 0x28: /* ashl */ | |
808 | case 0x29: /* sub.l */ | |
809 | case 0x2a: /* neg */ | |
810 | case 0x2b: /* or */ | |
811 | case 0x2c: /* not */ | |
812 | case 0x2d: /* ashr */ | |
813 | case 0x2e: /* xor */ | |
814 | case 0x2f: /* mul.l */ | |
815 | { | |
816 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 817 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
818 | return -1; |
819 | } | |
820 | break; | |
821 | case 0x30: /* swi */ | |
822 | { | |
823 | /* We currently implement support for libgloss' | |
824 | system calls. */ | |
825 | ||
948f8e3d | 826 | int inum = moxie_process_readu (addr+2, buf, 4, byte_order); |
451fa05e AG |
827 | |
828 | switch (inum) | |
829 | { | |
830 | case 0x1: /* SYS_exit */ | |
831 | { | |
832 | /* Do nothing. */ | |
833 | } | |
834 | break; | |
835 | case 0x2: /* SYS_open */ | |
836 | { | |
25ea693b | 837 | if (record_full_arch_list_add_reg (regcache, RET1_REGNUM)) |
451fa05e AG |
838 | return -1; |
839 | } | |
840 | break; | |
841 | case 0x4: /* SYS_read */ | |
842 | { | |
843 | uint32_t length, ptr; | |
844 | ||
845 | /* Read buffer pointer is in $r1. */ | |
846 | regcache_raw_read (regcache, 3, (gdb_byte *) & ptr); | |
847 | ptr = extract_unsigned_integer ((gdb_byte *) & ptr, | |
848 | 4, byte_order); | |
849 | ||
025bb325 | 850 | /* String length is at 0x12($fp). */ |
451fa05e AG |
851 | regcache_raw_read (regcache, |
852 | MOXIE_FP_REGNUM, (gdb_byte *) & tmpu32); | |
853 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
854 | 4, byte_order); | |
948f8e3d | 855 | length = moxie_process_readu (tmpu32+20, buf, 4, byte_order); |
451fa05e | 856 | |
25ea693b | 857 | if (record_full_arch_list_add_mem (ptr, length)) |
451fa05e AG |
858 | return -1; |
859 | } | |
860 | break; | |
861 | case 0x5: /* SYS_write */ | |
862 | { | |
25ea693b | 863 | if (record_full_arch_list_add_reg (regcache, RET1_REGNUM)) |
451fa05e AG |
864 | return -1; |
865 | } | |
866 | break; | |
867 | default: | |
868 | break; | |
869 | } | |
870 | } | |
871 | break; | |
872 | case 0x31: /* div.l */ | |
873 | case 0x32: /* udiv.l */ | |
874 | case 0x33: /* mod.l */ | |
875 | case 0x34: /* umod.l */ | |
876 | { | |
877 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 878 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
879 | return -1; |
880 | } | |
881 | break; | |
882 | case 0x35: /* brk */ | |
883 | /* Do nothing. */ | |
884 | break; | |
885 | case 0x36: /* ldo.b */ | |
886 | { | |
887 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 888 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
889 | return -1; |
890 | } | |
891 | break; | |
892 | case 0x37: /* sto.b */ | |
893 | { | |
894 | int reg = (inst >> 4) & 0xf; | |
895 | uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4, | |
896 | byte_order); | |
897 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
898 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
899 | 4, byte_order); | |
900 | tmpu32 += offset; | |
25ea693b | 901 | if (record_full_arch_list_add_mem (tmpu32, 1)) |
451fa05e AG |
902 | return -1; |
903 | } | |
904 | break; | |
905 | case 0x38: /* ldo.s */ | |
906 | { | |
907 | int reg = (inst >> 4) & 0xf; | |
25ea693b | 908 | if (record_full_arch_list_add_reg (regcache, reg)) |
451fa05e AG |
909 | return -1; |
910 | } | |
911 | break; | |
912 | case 0x39: /* sto.s */ | |
913 | { | |
914 | int reg = (inst >> 4) & 0xf; | |
915 | uint32_t offset = (uint32_t) moxie_process_readu (addr+2, buf, 4, | |
916 | byte_order); | |
917 | regcache_raw_read (regcache, reg, (gdb_byte *) & tmpu32); | |
918 | tmpu32 = extract_unsigned_integer ((gdb_byte *) & tmpu32, | |
919 | 4, byte_order); | |
920 | tmpu32 += offset; | |
25ea693b | 921 | if (record_full_arch_list_add_mem (tmpu32, 2)) |
451fa05e AG |
922 | return -1; |
923 | } | |
924 | break; | |
925 | default: | |
926 | /* Do nothing. */ | |
927 | break; | |
928 | } | |
929 | } | |
930 | ||
25ea693b | 931 | if (record_full_arch_list_add_reg (regcache, MOXIE_PC_REGNUM)) |
451fa05e | 932 | return -1; |
25ea693b | 933 | if (record_full_arch_list_add_end ()) |
451fa05e AG |
934 | return -1; |
935 | return 0; | |
936 | } | |
937 | ||
d7066cce AG |
938 | /* Allocate and initialize the moxie gdbarch object. */ |
939 | ||
940 | static struct gdbarch * | |
941 | moxie_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) | |
942 | { | |
943 | struct gdbarch *gdbarch; | |
944 | struct gdbarch_tdep *tdep; | |
945 | ||
946 | /* If there is already a candidate, use it. */ | |
947 | arches = gdbarch_list_lookup_by_info (arches, &info); | |
948 | if (arches != NULL) | |
949 | return arches->gdbarch; | |
950 | ||
951 | /* Allocate space for the new architecture. */ | |
952 | tdep = XMALLOC (struct gdbarch_tdep); | |
953 | gdbarch = gdbarch_alloc (&info, tdep); | |
954 | ||
955 | set_gdbarch_read_pc (gdbarch, moxie_read_pc); | |
956 | set_gdbarch_write_pc (gdbarch, moxie_write_pc); | |
957 | set_gdbarch_unwind_sp (gdbarch, moxie_unwind_sp); | |
958 | ||
959 | set_gdbarch_num_regs (gdbarch, MOXIE_NUM_REGS); | |
960 | set_gdbarch_sp_regnum (gdbarch, MOXIE_SP_REGNUM); | |
451fa05e | 961 | set_gdbarch_pc_regnum (gdbarch, MOXIE_PC_REGNUM); |
d7066cce AG |
962 | set_gdbarch_register_name (gdbarch, moxie_register_name); |
963 | set_gdbarch_register_type (gdbarch, moxie_register_type); | |
964 | ||
965 | set_gdbarch_return_value (gdbarch, moxie_return_value); | |
966 | ||
967 | set_gdbarch_skip_prologue (gdbarch, moxie_skip_prologue); | |
968 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); | |
969 | set_gdbarch_breakpoint_from_pc (gdbarch, moxie_breakpoint_from_pc); | |
970 | set_gdbarch_frame_align (gdbarch, moxie_frame_align); | |
971 | ||
972 | frame_base_set_default (gdbarch, &moxie_frame_base); | |
973 | ||
974 | /* Methods for saving / extracting a dummy frame's ID. The ID's | |
975 | stack address must match the SP value returned by | |
976 | PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */ | |
977 | set_gdbarch_dummy_id (gdbarch, moxie_dummy_id); | |
978 | ||
979 | set_gdbarch_unwind_pc (gdbarch, moxie_unwind_pc); | |
980 | ||
981 | set_gdbarch_print_insn (gdbarch, print_insn_moxie); | |
982 | ||
983 | /* Hook in ABI-specific overrides, if they have been registered. */ | |
984 | gdbarch_init_osabi (info, gdbarch); | |
985 | ||
986 | /* Hook in the default unwinders. */ | |
987 | frame_unwind_append_unwinder (gdbarch, &moxie_frame_unwind); | |
988 | ||
989 | /* Support simple overlay manager. */ | |
990 | set_gdbarch_overlay_update (gdbarch, simple_overlay_update); | |
991 | ||
451fa05e AG |
992 | /* Support reverse debugging. */ |
993 | set_gdbarch_process_record (gdbarch, moxie_process_record); | |
994 | ||
d7066cce AG |
995 | return gdbarch; |
996 | } | |
997 | ||
998 | /* Register this machine's init routine. */ | |
999 | ||
1000 | void | |
1001 | _initialize_moxie_tdep (void) | |
1002 | { | |
1003 | register_gdbarch_init (bfd_arch_moxie, moxie_gdbarch_init); | |
1004 | } |