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Rename in_function_epilogue_p to stack_frame_destroyed_p
[deliverable/binutils-gdb.git] / gdb / score-tdep.c
1 /* Target-dependent code for the S+core architecture, for GDB,
2 the GNU Debugger.
3
4 Copyright (C) 2006-2015 Free Software Foundation, Inc.
5
6 Contributed by Qinwei (qinwei@sunnorth.com.cn)
7 Contributed by Ching-Peng Lin (cplin@sunplus.com)
8
9 This file is part of GDB.
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23
24 #include "defs.h"
25 #include "inferior.h"
26 #include "symtab.h"
27 #include "objfiles.h"
28 #include "gdbcore.h"
29 #include "target.h"
30 #include "arch-utils.h"
31 #include "regcache.h"
32 #include "regset.h"
33 #include "dis-asm.h"
34 #include "frame-unwind.h"
35 #include "frame-base.h"
36 #include "trad-frame.h"
37 #include "dwarf2-frame.h"
38 #include "score-tdep.h"
39
40 #define G_FLD(_i,_ms,_ls) \
41 ((unsigned)((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls)))
42
43 typedef struct{
44 unsigned long long v;
45 unsigned long long raw;
46 unsigned int len;
47 }inst_t;
48
49 struct score_frame_cache
50 {
51 CORE_ADDR base;
52 CORE_ADDR fp;
53 struct trad_frame_saved_reg *saved_regs;
54 };
55
56 static int target_mach = bfd_mach_score7;
57
58 static struct type *
59 score_register_type (struct gdbarch *gdbarch, int regnum)
60 {
61 gdb_assert (regnum >= 0
62 && regnum < ((target_mach == bfd_mach_score7)
63 ? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
64 return builtin_type (gdbarch)->builtin_uint32;
65 }
66
67 static CORE_ADDR
68 score_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
69 {
70 return frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
71 }
72
73 static CORE_ADDR
74 score_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
75 {
76 return frame_unwind_register_unsigned (next_frame, SCORE_PC_REGNUM);
77 }
78
79 static const char *
80 score7_register_name (struct gdbarch *gdbarch, int regnum)
81 {
82 const char *score_register_names[] = {
83 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
84 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
85 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
86 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
87
88 "PSR", "COND", "ECR", "EXCPVEC", "CCR",
89 "EPC", "EMA", "TLBLOCK", "TLBPT", "PEADDR",
90 "TLBRPT", "PEVN", "PECTX", "LIMPFN", "LDMPFN",
91 "PREV", "DREG", "PC", "DSAVE", "COUNTER",
92 "LDCR", "STCR", "CEH", "CEL",
93 };
94
95 gdb_assert (regnum >= 0 && regnum < SCORE7_NUM_REGS);
96 return score_register_names[regnum];
97 }
98
99 static const char *
100 score3_register_name (struct gdbarch *gdbarch, int regnum)
101 {
102 const char *score_register_names[] = {
103 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
104 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
105 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
106 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
107
108 "PSR", "COND", "ECR", "EXCPVEC", "CCR",
109 "EPC", "EMA", "PREV", "DREG", "DSAVE",
110 "COUNTER", "LDCR", "STCR", "CEH", "CEL",
111 "", "", "PC",
112 };
113
114 gdb_assert (regnum >= 0 && regnum < SCORE3_NUM_REGS);
115 return score_register_names[regnum];
116 }
117
118 #if WITH_SIM
119 static int
120 score_register_sim_regno (struct gdbarch *gdbarch, int regnum)
121 {
122 gdb_assert (regnum >= 0
123 && regnum < ((target_mach == bfd_mach_score7)
124 ? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
125 return regnum;
126 }
127 #endif
128
129 static int
130 score_print_insn (bfd_vma memaddr, struct disassemble_info *info)
131 {
132 if (info->endian == BFD_ENDIAN_BIG)
133 return print_insn_big_score (memaddr, info);
134 else
135 return print_insn_little_score (memaddr, info);
136 }
137
138 static inst_t *
139 score7_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, gdb_byte *memblock)
140 {
141 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
142 static inst_t inst = { 0, 0, 0 };
143 gdb_byte buf[SCORE_INSTLEN] = { 0 };
144 int big;
145 int ret;
146
147 if (target_has_execution && memblock != NULL)
148 {
149 /* Fetch instruction from local MEMBLOCK. */
150 memcpy (buf, memblock, SCORE_INSTLEN);
151 }
152 else
153 {
154 /* Fetch instruction from target. */
155 ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
156 if (ret)
157 {
158 error (_("Error: target_read_memory in file:%s, line:%d!"),
159 __FILE__, __LINE__);
160 return 0;
161 }
162 }
163
164 inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
165 inst.len = (inst.raw & 0x80008000) ? 4 : 2;
166 inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
167 big = (byte_order == BFD_ENDIAN_BIG);
168 if (inst.len == 2)
169 {
170 if (big ^ ((addr & 0x2) == 2))
171 inst.v = G_FLD (inst.v, 29, 15);
172 else
173 inst.v = G_FLD (inst.v, 14, 0);
174 }
175 return &inst;
176 }
177
178 static inst_t *
179 score3_adjust_pc_and_fetch_inst (CORE_ADDR *pcptr, int *lenptr,
180 enum bfd_endian byte_order)
181 {
182 static inst_t inst = { 0, 0, 0 };
183
184 struct breakplace
185 {
186 int break_offset;
187 int inst_len;
188 };
189 /* raw table 1 (column 2, 3, 4)
190 * 0 1 0 * # 2
191 * 0 1 1 0 # 3
192 0 1 1 0 * # 6
193 table 2 (column 1, 2, 3)
194 * 0 0 * * # 0, 4
195 0 1 0 * * # 2
196 1 1 0 * * # 6
197 */
198
199 static const struct breakplace bk_table[16] =
200 {
201 /* table 1 */
202 {0, 0},
203 {0, 0},
204 {0, 4},
205 {0, 6},
206 {0, 0},
207 {0, 0},
208 {-2, 6},
209 {0, 0},
210 /* table 2 */
211 {0, 2},
212 {0, 0},
213 {-2, 4},
214 {0, 0},
215 {0, 2},
216 {0, 0},
217 {-4, 6},
218 {0, 0}
219 };
220
221 #define EXTRACT_LEN 2
222 CORE_ADDR adjust_pc = *pcptr & ~0x1;
223 gdb_byte buf[5][EXTRACT_LEN] =
224 {
225 {'\0', '\0'},
226 {'\0', '\0'},
227 {'\0', '\0'},
228 {'\0', '\0'},
229 {'\0', '\0'}
230 };
231 int ret;
232 unsigned int raw;
233 unsigned int cbits = 0;
234 int bk_index;
235 int i, count;
236
237 inst.v = 0;
238 inst.raw = 0;
239 inst.len = 0;
240
241 adjust_pc -= 4;
242 for (i = 0; i < 5; i++)
243 {
244 ret = target_read_memory (adjust_pc + 2 * i, buf[i], EXTRACT_LEN);
245 if (ret != 0)
246 {
247 buf[i][0] = '\0';
248 buf[i][1] = '\0';
249 if (i == 2)
250 error (_("Error: target_read_memory in file:%s, line:%d!"),
251 __FILE__, __LINE__);
252 }
253
254 raw = extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
255 cbits = (cbits << 1) | (raw >> 15);
256 }
257 adjust_pc += 4;
258
259 if (cbits & 0x4)
260 {
261 /* table 1 */
262 cbits = (cbits >> 1) & 0x7;
263 bk_index = cbits;
264 }
265 else
266 {
267 /* table 2 */
268 cbits = (cbits >> 2) & 0x7;
269 bk_index = cbits + 8;
270 }
271
272 gdb_assert (!((bk_table[bk_index].break_offset == 0)
273 && (bk_table[bk_index].inst_len == 0)));
274
275 inst.len = bk_table[bk_index].inst_len;
276
277 i = (bk_table[bk_index].break_offset + 4) / 2;
278 count = inst.len / 2;
279 for (; count > 0; i++, count--)
280 {
281 inst.raw = (inst.raw << 16)
282 | extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
283 }
284
285 switch (inst.len)
286 {
287 case 2:
288 inst.v = inst.raw & 0x7FFF;
289 break;
290 case 4:
291 inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
292 break;
293 case 6:
294 inst.v = ((inst.raw >> 32 & 0x7FFF) << 30)
295 | ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
296 break;
297 }
298
299 if (pcptr)
300 *pcptr = adjust_pc + bk_table[bk_index].break_offset;
301 if (lenptr)
302 *lenptr = bk_table[bk_index].inst_len;
303
304 #undef EXTRACT_LEN
305
306 return &inst;
307 }
308
309 static const gdb_byte *
310 score7_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
311 int *lenptr)
312 {
313 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
314 gdb_byte buf[SCORE_INSTLEN] = { 0 };
315 int ret;
316 unsigned int raw;
317
318 if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
319 {
320 error (_("Error: target_read_memory in file:%s, line:%d!"),
321 __FILE__, __LINE__);
322 }
323 raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
324
325 if (byte_order == BFD_ENDIAN_BIG)
326 {
327 if (!(raw & 0x80008000))
328 {
329 /* 16bits instruction. */
330 static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
331 *pcptr &= ~0x1;
332 *lenptr = sizeof (big_breakpoint16);
333 return big_breakpoint16;
334 }
335 else
336 {
337 /* 32bits instruction. */
338 static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
339 *pcptr &= ~0x3;
340 *lenptr = sizeof (big_breakpoint32);
341 return big_breakpoint32;
342 }
343 }
344 else
345 {
346 if (!(raw & 0x80008000))
347 {
348 /* 16bits instruction. */
349 static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
350 *pcptr &= ~0x1;
351 *lenptr = sizeof (little_breakpoint16);
352 return little_breakpoint16;
353 }
354 else
355 {
356 /* 32bits instruction. */
357 static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
358 *pcptr &= ~0x3;
359 *lenptr = sizeof (little_breakpoint32);
360 return little_breakpoint32;
361 }
362 }
363 }
364
365 static const gdb_byte *
366 score3_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
367 int *lenptr)
368 {
369 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
370 CORE_ADDR adjust_pc = *pcptr;
371 int len;
372 static gdb_byte score_break_insns[6][6] = {
373 /* The following three instructions are big endian. */
374 { 0x00, 0x20 },
375 { 0x80, 0x00, 0x00, 0x06 },
376 { 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 },
377 /* The following three instructions are little endian. */
378 { 0x20, 0x00 },
379 { 0x00, 0x80, 0x06, 0x00 },
380 { 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }};
381
382 gdb_byte *p = NULL;
383 int index = 0;
384
385 score3_adjust_pc_and_fetch_inst (&adjust_pc, &len, byte_order);
386
387 index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (len / 2 - 1);
388 p = score_break_insns[index];
389
390 *pcptr = adjust_pc;
391 *lenptr = len;
392
393 return p;
394 }
395
396 static CORE_ADDR
397 score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr)
398 {
399 CORE_ADDR adjust_pc = bpaddr;
400
401 if (target_mach == bfd_mach_score3)
402 score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL,
403 gdbarch_byte_order (gdbarch));
404 else
405 adjust_pc = align_down (adjust_pc, 2);
406
407 return adjust_pc;
408 }
409
410 static CORE_ADDR
411 score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
412 {
413 return align_down (addr, 16);
414 }
415
416 static void
417 score_xfer_register (struct regcache *regcache, int regnum, int length,
418 enum bfd_endian endian, gdb_byte *readbuf,
419 const gdb_byte *writebuf, int buf_offset)
420 {
421 int reg_offset = 0;
422 gdb_assert (regnum >= 0
423 && regnum < ((target_mach == bfd_mach_score7)
424 ? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
425
426 switch (endian)
427 {
428 case BFD_ENDIAN_BIG:
429 reg_offset = SCORE_REGSIZE - length;
430 break;
431 case BFD_ENDIAN_LITTLE:
432 reg_offset = 0;
433 break;
434 case BFD_ENDIAN_UNKNOWN:
435 reg_offset = 0;
436 break;
437 default:
438 error (_("Error: score_xfer_register in file:%s, line:%d!"),
439 __FILE__, __LINE__);
440 }
441
442 if (readbuf != NULL)
443 regcache_cooked_read_part (regcache, regnum, reg_offset, length,
444 readbuf + buf_offset);
445 if (writebuf != NULL)
446 regcache_cooked_write_part (regcache, regnum, reg_offset, length,
447 writebuf + buf_offset);
448 }
449
450 static enum return_value_convention
451 score_return_value (struct gdbarch *gdbarch, struct value *function,
452 struct type *type, struct regcache *regcache,
453 gdb_byte * readbuf, const gdb_byte * writebuf)
454 {
455 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
456 || TYPE_CODE (type) == TYPE_CODE_UNION
457 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
458 return RETURN_VALUE_STRUCT_CONVENTION;
459 else
460 {
461 int offset;
462 int regnum;
463 for (offset = 0, regnum = SCORE_A0_REGNUM;
464 offset < TYPE_LENGTH (type);
465 offset += SCORE_REGSIZE, regnum++)
466 {
467 int xfer = SCORE_REGSIZE;
468
469 if (offset + xfer > TYPE_LENGTH (type))
470 xfer = TYPE_LENGTH (type) - offset;
471 score_xfer_register (regcache, regnum, xfer,
472 gdbarch_byte_order(gdbarch),
473 readbuf, writebuf, offset);
474 }
475 return RETURN_VALUE_REGISTER_CONVENTION;
476 }
477 }
478
479 static struct frame_id
480 score_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
481 {
482 return frame_id_build (get_frame_register_unsigned (this_frame,
483 SCORE_SP_REGNUM),
484 get_frame_pc (this_frame));
485 }
486
487 static int
488 score_type_needs_double_align (struct type *type)
489 {
490 enum type_code typecode = TYPE_CODE (type);
491
492 if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
493 || (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
494 return 1;
495 else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
496 {
497 int i, n;
498
499 n = TYPE_NFIELDS (type);
500 for (i = 0; i < n; i++)
501 if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i)))
502 return 1;
503 return 0;
504 }
505 return 0;
506 }
507
508 static CORE_ADDR
509 score_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
510 struct regcache *regcache, CORE_ADDR bp_addr,
511 int nargs, struct value **args, CORE_ADDR sp,
512 int struct_return, CORE_ADDR struct_addr)
513 {
514 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
515 int argnum;
516 int argreg;
517 int arglen = 0;
518 CORE_ADDR stack_offset = 0;
519 CORE_ADDR addr = 0;
520
521 /* Step 1, Save RA. */
522 regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
523
524 /* Step 2, Make space on the stack for the args. */
525 struct_addr = align_down (struct_addr, 16);
526 sp = align_down (sp, 16);
527 for (argnum = 0; argnum < nargs; argnum++)
528 arglen += align_up (TYPE_LENGTH (value_type (args[argnum])),
529 SCORE_REGSIZE);
530 sp -= align_up (arglen, 16);
531
532 argreg = SCORE_BEGIN_ARG_REGNUM;
533
534 /* Step 3, Check if struct return then save the struct address to
535 r4 and increase the stack_offset by 4. */
536 if (struct_return)
537 {
538 regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
539 stack_offset += SCORE_REGSIZE;
540 }
541
542 /* Step 4, Load arguments:
543 If arg length is too long (> 4 bytes), then split the arg and
544 save every parts. */
545 for (argnum = 0; argnum < nargs; argnum++)
546 {
547 struct value *arg = args[argnum];
548 struct type *arg_type = check_typedef (value_type (arg));
549 enum type_code typecode = TYPE_CODE (arg_type);
550 const gdb_byte *val = value_contents (arg);
551 int downward_offset = 0;
552 int odd_sized_struct_p;
553 int arg_last_part_p = 0;
554
555 arglen = TYPE_LENGTH (arg_type);
556 odd_sized_struct_p = (arglen > SCORE_REGSIZE
557 && arglen % SCORE_REGSIZE != 0);
558
559 /* If a arg should be aligned to 8 bytes (long long or double),
560 the value should be put to even register numbers. */
561 if (score_type_needs_double_align (arg_type))
562 {
563 if (argreg & 1)
564 argreg++;
565 }
566
567 /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
568 the default "downward"/"upward" method:
569
570 Example:
571
572 struct struc
573 {
574 char a; char b; char c;
575 } s = {'a', 'b', 'c'};
576
577 Big endian: s = {X, 'a', 'b', 'c'}
578 Little endian: s = {'a', 'b', 'c', X}
579
580 Where X is a hole. */
581
582 if (gdbarch_byte_order(gdbarch) == BFD_ENDIAN_BIG
583 && (typecode == TYPE_CODE_STRUCT
584 || typecode == TYPE_CODE_UNION)
585 && argreg > SCORE_LAST_ARG_REGNUM
586 && arglen < SCORE_REGSIZE)
587 downward_offset += (SCORE_REGSIZE - arglen);
588
589 while (arglen > 0)
590 {
591 int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
592 ULONGEST regval = extract_unsigned_integer (val, partial_len,
593 byte_order);
594
595 /* The last part of a arg should shift left when
596 gdbarch_byte_order is BFD_ENDIAN_BIG. */
597 if (byte_order == BFD_ENDIAN_BIG
598 && arg_last_part_p == 1
599 && (typecode == TYPE_CODE_STRUCT
600 || typecode == TYPE_CODE_UNION))
601 regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT);
602
603 /* Always increase the stack_offset and save args to stack. */
604 addr = sp + stack_offset + downward_offset;
605 write_memory (addr, val, partial_len);
606
607 if (argreg <= SCORE_LAST_ARG_REGNUM)
608 {
609 regcache_cooked_write_unsigned (regcache, argreg++, regval);
610 if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
611 arg_last_part_p = 1;
612 }
613
614 val += partial_len;
615 arglen -= partial_len;
616 stack_offset += align_up (partial_len, SCORE_REGSIZE);
617 }
618 }
619
620 /* Step 5, Save SP. */
621 regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
622
623 return sp;
624 }
625
626 static CORE_ADDR
627 score7_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
628 {
629 CORE_ADDR cpc = pc;
630 int iscan = 32, stack_sub = 0;
631 while (iscan-- > 0)
632 {
633 inst_t *inst = score7_fetch_inst (gdbarch, cpc, NULL);
634 if (!inst)
635 break;
636 if ((inst->len == 4) && !stack_sub
637 && (G_FLD (inst->v, 29, 25) == 0x1
638 && G_FLD (inst->v, 24, 20) == 0x0))
639 {
640 /* addi r0, offset */
641 stack_sub = cpc + SCORE_INSTLEN;
642 pc = cpc + SCORE_INSTLEN;
643 }
644 else if ((inst->len == 4)
645 && (G_FLD (inst->v, 29, 25) == 0x0)
646 && (G_FLD (inst->v, 24, 20) == 0x2)
647 && (G_FLD (inst->v, 19, 15) == 0x0)
648 && (G_FLD (inst->v, 14, 10) == 0xF)
649 && (G_FLD (inst->v, 9, 0) == 0x56))
650 {
651 /* mv r2, r0 */
652 pc = cpc + SCORE_INSTLEN;
653 break;
654 }
655 else if ((inst->len == 2)
656 && (G_FLD (inst->v, 14, 12) == 0x0)
657 && (G_FLD (inst->v, 11, 8) == 0x2)
658 && (G_FLD (inst->v, 7, 4) == 0x0)
659 && (G_FLD (inst->v, 3, 0) == 0x3))
660 {
661 /* mv! r2, r0 */
662 pc = cpc + SCORE16_INSTLEN;
663 break;
664 }
665 else if ((inst->len == 2)
666 && ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */
667 || (G_FLD (inst->v, 14, 12) == 4) /* b15 form */
668 || (G_FLD (inst->v, 14, 12) == 0x0
669 && G_FLD (inst->v, 3, 0) == 0x4))) /* br! */
670 break;
671 else if ((inst->len == 4)
672 && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
673 || (G_FLD (inst->v, 29, 25) == 4) /* b32 form */
674 || (G_FLD (inst->v, 29, 25) == 0x0
675 && G_FLD (inst->v, 6, 1) == 0x4))) /* br */
676 break;
677
678 cpc += (inst->len == 2) ? SCORE16_INSTLEN : SCORE_INSTLEN;
679 }
680 return pc;
681 }
682
683 static CORE_ADDR
684 score3_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
685 {
686 CORE_ADDR cpc = pc;
687 int iscan = 32, stack_sub = 0;
688 while (iscan-- > 0)
689 {
690 inst_t *inst
691 = score3_adjust_pc_and_fetch_inst (&cpc, NULL,
692 gdbarch_byte_order (gdbarch));
693
694 if (!inst)
695 break;
696 if (inst->len == 4 && !stack_sub
697 && (G_FLD (inst->v, 29, 25) == 0x1)
698 && (G_FLD (inst->v, 19, 17) == 0x0)
699 && (G_FLD (inst->v, 24, 20) == 0x0))
700 {
701 /* addi r0, offset */
702 stack_sub = cpc + inst->len;
703 pc = cpc + inst->len;
704 }
705 else if (inst->len == 4
706 && (G_FLD (inst->v, 29, 25) == 0x0)
707 && (G_FLD (inst->v, 24, 20) == 0x2)
708 && (G_FLD (inst->v, 19, 15) == 0x0)
709 && (G_FLD (inst->v, 14, 10) == 0xF)
710 && (G_FLD (inst->v, 9, 0) == 0x56))
711 {
712 /* mv r2, r0 */
713 pc = cpc + inst->len;
714 break;
715 }
716 else if ((inst->len == 2)
717 && (G_FLD (inst->v, 14, 10) == 0x10)
718 && (G_FLD (inst->v, 9, 5) == 0x2)
719 && (G_FLD (inst->v, 4, 0) == 0x0))
720 {
721 /* mv! r2, r0 */
722 pc = cpc + inst->len;
723 break;
724 }
725 else if (inst->len == 2
726 && ((G_FLD (inst->v, 14, 12) == 3) /* b15 form */
727 || (G_FLD (inst->v, 14, 12) == 0x0
728 && G_FLD (inst->v, 11, 5) == 0x4))) /* br! */
729 break;
730 else if (inst->len == 4
731 && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
732 || (G_FLD (inst->v, 29, 25) == 4))) /* b32 form */
733 break;
734
735 cpc += inst->len;
736 }
737 return pc;
738 }
739
740 /* Implement the stack_frame_destroyed_p gdbarch method. */
741
742 static int
743 score7_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
744 {
745 inst_t *inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
746
747 if (inst->v == 0x23)
748 return 1; /* mv! r0, r2 */
749 else if (G_FLD (inst->v, 14, 12) == 0x2
750 && G_FLD (inst->v, 3, 0) == 0xa)
751 return 1; /* pop! */
752 else if (G_FLD (inst->v, 14, 12) == 0x0
753 && G_FLD (inst->v, 7, 0) == 0x34)
754 return 1; /* br! r3 */
755 else if (G_FLD (inst->v, 29, 15) == 0x2
756 && G_FLD (inst->v, 6, 1) == 0x2b)
757 return 1; /* mv r0, r2 */
758 else if (G_FLD (inst->v, 29, 25) == 0x0
759 && G_FLD (inst->v, 6, 1) == 0x4
760 && G_FLD (inst->v, 19, 15) == 0x3)
761 return 1; /* br r3 */
762 else
763 return 0;
764 }
765
766 /* Implement the stack_frame_destroyed_p gdbarch method. */
767
768 static int
769 score3_stack_frame_destroyed_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
770 {
771 CORE_ADDR pc = cur_pc;
772 inst_t *inst
773 = score3_adjust_pc_and_fetch_inst (&pc, NULL,
774 gdbarch_byte_order (gdbarch));
775
776 if (inst->len == 2
777 && (G_FLD (inst->v, 14, 10) == 0x10)
778 && (G_FLD (inst->v, 9, 5) == 0x0)
779 && (G_FLD (inst->v, 4, 0) == 0x2))
780 return 1; /* mv! r0, r2 */
781 else if (inst->len == 4
782 && (G_FLD (inst->v, 29, 25) == 0x0)
783 && (G_FLD (inst->v, 24, 20) == 0x2)
784 && (G_FLD (inst->v, 19, 15) == 0x0)
785 && (G_FLD (inst->v, 14, 10) == 0xF)
786 && (G_FLD (inst->v, 9, 0) == 0x56))
787 return 1; /* mv r0, r2 */
788 else if (inst->len == 2
789 && (G_FLD (inst->v, 14, 12) == 0x0)
790 && (G_FLD (inst->v, 11, 5) == 0x2))
791 return 1; /* pop! */
792 else if (inst->len == 2
793 && (G_FLD (inst->v, 14, 12) == 0x0)
794 && (G_FLD (inst->v, 11, 7) == 0x0)
795 && (G_FLD (inst->v, 6, 5) == 0x2))
796 return 1; /* rpop! */
797 else if (inst->len == 2
798 && (G_FLD (inst->v, 14, 12) == 0x0)
799 && (G_FLD (inst->v, 11, 5) == 0x4)
800 && (G_FLD (inst->v, 4, 0) == 0x3))
801 return 1; /* br! r3 */
802 else if (inst->len == 4
803 && (G_FLD (inst->v, 29, 25) == 0x0)
804 && (G_FLD (inst->v, 24, 20) == 0x0)
805 && (G_FLD (inst->v, 19, 15) == 0x3)
806 && (G_FLD (inst->v, 14, 10) == 0xF)
807 && (G_FLD (inst->v, 9, 0) == 0x8))
808 return 1; /* br r3 */
809 else
810 return 0;
811 }
812
813 static gdb_byte *
814 score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
815 {
816 int ret;
817 gdb_byte *memblock = NULL;
818
819 if (size < 0)
820 {
821 error (_("Error: malloc size < 0 in file:%s, line:%d!"),
822 __FILE__, __LINE__);
823 return NULL;
824 }
825 else if (size == 0)
826 return NULL;
827
828 memblock = xmalloc (size);
829 memset (memblock, 0, size);
830 ret = target_read_memory (addr & ~0x3, memblock, size);
831 if (ret)
832 {
833 error (_("Error: target_read_memory in file:%s, line:%d!"),
834 __FILE__, __LINE__);
835 return NULL;
836 }
837 return memblock;
838 }
839
840 static void
841 score7_free_memblock (gdb_byte *memblock)
842 {
843 xfree (memblock);
844 }
845
846 static void
847 score7_adjust_memblock_ptr (gdb_byte **memblock, CORE_ADDR prev_pc,
848 CORE_ADDR cur_pc)
849 {
850 if (prev_pc == -1)
851 {
852 /* First time call this function, do nothing. */
853 }
854 else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0)
855 {
856 /* First 16-bit instruction, then 32-bit instruction. */
857 *memblock += SCORE_INSTLEN;
858 }
859 else if (cur_pc - prev_pc == 4)
860 {
861 /* Is 32-bit instruction, increase MEMBLOCK by 4. */
862 *memblock += SCORE_INSTLEN;
863 }
864 }
865
866 static void
867 score7_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
868 struct frame_info *this_frame,
869 struct score_frame_cache *this_cache)
870 {
871 struct gdbarch *gdbarch = get_frame_arch (this_frame);
872 CORE_ADDR sp;
873 CORE_ADDR fp;
874 CORE_ADDR cur_pc = startaddr;
875
876 int sp_offset = 0;
877 int ra_offset = 0;
878 int fp_offset = 0;
879 int ra_offset_p = 0;
880 int fp_offset_p = 0;
881 int inst_len = 0;
882
883 gdb_byte *memblock = NULL;
884 gdb_byte *memblock_ptr = NULL;
885 CORE_ADDR prev_pc = -1;
886
887 /* Allocate MEMBLOCK if PC - STARTADDR > 0. */
888 memblock_ptr = memblock =
889 score7_malloc_and_get_memblock (startaddr, pc - startaddr);
890
891 sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
892 fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
893
894 for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
895 {
896 inst_t *inst = NULL;
897 if (memblock != NULL)
898 {
899 /* Reading memory block from target succefully and got all
900 the instructions(from STARTADDR to PC) needed. */
901 score7_adjust_memblock_ptr (&memblock, prev_pc, cur_pc);
902 inst = score7_fetch_inst (gdbarch, cur_pc, memblock);
903 }
904 else
905 {
906 /* Otherwise, we fetch 4 bytes from target, and GDB also
907 work correctly. */
908 inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
909 }
910
911 /* FIXME: make a full-power prologue analyzer. */
912 if (inst->len == 2)
913 {
914 inst_len = SCORE16_INSTLEN;
915
916 if (G_FLD (inst->v, 14, 12) == 0x2
917 && G_FLD (inst->v, 3, 0) == 0xe)
918 {
919 /* push! */
920 sp_offset += 4;
921
922 if (G_FLD (inst->v, 11, 7) == 0x6
923 && ra_offset_p == 0)
924 {
925 /* push! r3, [r0] */
926 ra_offset = sp_offset;
927 ra_offset_p = 1;
928 }
929 else if (G_FLD (inst->v, 11, 7) == 0x4
930 && fp_offset_p == 0)
931 {
932 /* push! r2, [r0] */
933 fp_offset = sp_offset;
934 fp_offset_p = 1;
935 }
936 }
937 else if (G_FLD (inst->v, 14, 12) == 0x2
938 && G_FLD (inst->v, 3, 0) == 0xa)
939 {
940 /* pop! */
941 sp_offset -= 4;
942 }
943 else if (G_FLD (inst->v, 14, 7) == 0xc1
944 && G_FLD (inst->v, 2, 0) == 0x0)
945 {
946 /* subei! r0, n */
947 sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3));
948 }
949 else if (G_FLD (inst->v, 14, 7) == 0xc0
950 && G_FLD (inst->v, 2, 0) == 0x0)
951 {
952 /* addei! r0, n */
953 sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3));
954 }
955 }
956 else
957 {
958 inst_len = SCORE_INSTLEN;
959
960 if (G_FLD(inst->v, 29, 25) == 0x3
961 && G_FLD(inst->v, 2, 0) == 0x4
962 && G_FLD(inst->v, 19, 15) == 0)
963 {
964 /* sw rD, [r0, offset]+ */
965 sp_offset += SCORE_INSTLEN;
966
967 if (G_FLD(inst->v, 24, 20) == 0x3)
968 {
969 /* rD = r3 */
970 if (ra_offset_p == 0)
971 {
972 ra_offset = sp_offset;
973 ra_offset_p = 1;
974 }
975 }
976 else if (G_FLD(inst->v, 24, 20) == 0x2)
977 {
978 /* rD = r2 */
979 if (fp_offset_p == 0)
980 {
981 fp_offset = sp_offset;
982 fp_offset_p = 1;
983 }
984 }
985 }
986 else if (G_FLD(inst->v, 29, 25) == 0x14
987 && G_FLD(inst->v, 19,15) == 0)
988 {
989 /* sw rD, [r0, offset] */
990 if (G_FLD(inst->v, 24, 20) == 0x3)
991 {
992 /* rD = r3 */
993 ra_offset = sp_offset - G_FLD(inst->v, 14, 0);
994 ra_offset_p = 1;
995 }
996 else if (G_FLD(inst->v, 24, 20) == 0x2)
997 {
998 /* rD = r2 */
999 fp_offset = sp_offset - G_FLD(inst->v, 14, 0);
1000 fp_offset_p = 1;
1001 }
1002 }
1003 else if (G_FLD (inst->v, 29, 15) == 0x1c60
1004 && G_FLD (inst->v, 2, 0) == 0x0)
1005 {
1006 /* lw r3, [r0]+, 4 */
1007 sp_offset -= SCORE_INSTLEN;
1008 ra_offset_p = 1;
1009 }
1010 else if (G_FLD (inst->v, 29, 15) == 0x1c40
1011 && G_FLD (inst->v, 2, 0) == 0x0)
1012 {
1013 /* lw r2, [r0]+, 4 */
1014 sp_offset -= SCORE_INSTLEN;
1015 fp_offset_p = 1;
1016 }
1017
1018 else if (G_FLD (inst->v, 29, 17) == 0x100
1019 && G_FLD (inst->v, 0, 0) == 0x0)
1020 {
1021 /* addi r0, -offset */
1022 sp_offset += 65536 - G_FLD (inst->v, 16, 1);
1023 }
1024 else if (G_FLD (inst->v, 29, 17) == 0x110
1025 && G_FLD (inst->v, 0, 0) == 0x0)
1026 {
1027 /* addi r2, offset */
1028 if (pc - cur_pc > 4)
1029 {
1030 unsigned int save_v = inst->v;
1031 inst_t *inst2 =
1032 score7_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL);
1033 if (inst2->v == 0x23)
1034 {
1035 /* mv! r0, r2 */
1036 sp_offset -= G_FLD (save_v, 16, 1);
1037 }
1038 }
1039 }
1040 }
1041 }
1042
1043 /* Save RA. */
1044 if (ra_offset_p == 1)
1045 {
1046 if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
1047 this_cache->saved_regs[SCORE_PC_REGNUM].addr =
1048 sp + sp_offset - ra_offset;
1049 }
1050 else
1051 {
1052 this_cache->saved_regs[SCORE_PC_REGNUM] =
1053 this_cache->saved_regs[SCORE_RA_REGNUM];
1054 }
1055
1056 /* Save FP. */
1057 if (fp_offset_p == 1)
1058 {
1059 if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
1060 this_cache->saved_regs[SCORE_FP_REGNUM].addr =
1061 sp + sp_offset - fp_offset;
1062 }
1063
1064 /* Save SP and FP. */
1065 this_cache->base = sp + sp_offset;
1066 this_cache->fp = fp;
1067
1068 /* Don't forget to free MEMBLOCK if we allocated it. */
1069 if (memblock_ptr != NULL)
1070 score7_free_memblock (memblock_ptr);
1071 }
1072
1073 static void
1074 score3_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
1075 struct frame_info *this_frame,
1076 struct score_frame_cache *this_cache)
1077 {
1078 CORE_ADDR sp;
1079 CORE_ADDR fp;
1080 CORE_ADDR cur_pc = startaddr;
1081 enum bfd_endian byte_order
1082 = gdbarch_byte_order (get_frame_arch (this_frame));
1083
1084 int sp_offset = 0;
1085 int ra_offset = 0;
1086 int fp_offset = 0;
1087 int ra_offset_p = 0;
1088 int fp_offset_p = 0;
1089 int inst_len = 0;
1090
1091 CORE_ADDR prev_pc = -1;
1092
1093 sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
1094 fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
1095
1096 for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
1097 {
1098 inst_t *inst = NULL;
1099
1100 inst = score3_adjust_pc_and_fetch_inst (&cur_pc, &inst_len, byte_order);
1101
1102 /* FIXME: make a full-power prologue analyzer. */
1103 if (inst->len == 2)
1104 {
1105 if (G_FLD (inst->v, 14, 12) == 0x0
1106 && G_FLD (inst->v, 11, 7) == 0x0
1107 && G_FLD (inst->v, 6, 5) == 0x3)
1108 {
1109 /* push! */
1110 sp_offset += 4;
1111
1112 if (G_FLD (inst->v, 4, 0) == 0x3
1113 && ra_offset_p == 0)
1114 {
1115 /* push! r3, [r0] */
1116 ra_offset = sp_offset;
1117 ra_offset_p = 1;
1118 }
1119 else if (G_FLD (inst->v, 4, 0) == 0x2
1120 && fp_offset_p == 0)
1121 {
1122 /* push! r2, [r0] */
1123 fp_offset = sp_offset;
1124 fp_offset_p = 1;
1125 }
1126 }
1127 else if (G_FLD (inst->v, 14, 12) == 0x6
1128 && G_FLD (inst->v, 11, 10) == 0x3)
1129 {
1130 /* rpush! */
1131 int start_r = G_FLD (inst->v, 9, 5);
1132 int cnt = G_FLD (inst->v, 4, 0);
1133
1134 if ((ra_offset_p == 0)
1135 && (start_r <= SCORE_RA_REGNUM)
1136 && (SCORE_RA_REGNUM < start_r + cnt))
1137 {
1138 /* rpush! contains r3 */
1139 ra_offset_p = 1;
1140 ra_offset = sp_offset + 4 * (SCORE_RA_REGNUM - start_r) + 4;
1141 }
1142
1143 if ((fp_offset_p == 0)
1144 && (start_r <= SCORE_FP_REGNUM)
1145 && (SCORE_FP_REGNUM < start_r + cnt))
1146 {
1147 /* rpush! contains r2 */
1148 fp_offset_p = 1;
1149 fp_offset = sp_offset + 4 * (SCORE_FP_REGNUM - start_r) + 4;
1150 }
1151
1152 sp_offset += 4 * cnt;
1153 }
1154 else if (G_FLD (inst->v, 14, 12) == 0x0
1155 && G_FLD (inst->v, 11, 7) == 0x0
1156 && G_FLD (inst->v, 6, 5) == 0x2)
1157 {
1158 /* pop! */
1159 sp_offset -= 4;
1160 }
1161 else if (G_FLD (inst->v, 14, 12) == 0x6
1162 && G_FLD (inst->v, 11, 10) == 0x2)
1163 {
1164 /* rpop! */
1165 sp_offset -= 4 * G_FLD (inst->v, 4, 0);
1166 }
1167 else if (G_FLD (inst->v, 14, 12) == 0x5
1168 && G_FLD (inst->v, 11, 10) == 0x3
1169 && G_FLD (inst->v, 9, 6) == 0x0)
1170 {
1171 /* addi! r0, -offset */
1172 int imm = G_FLD (inst->v, 5, 0);
1173 if (imm >> 5)
1174 imm = -(0x3F - imm + 1);
1175 sp_offset -= imm;
1176 }
1177 else if (G_FLD (inst->v, 14, 12) == 0x5
1178 && G_FLD (inst->v, 11, 10) == 0x3
1179 && G_FLD (inst->v, 9, 6) == 0x2)
1180 {
1181 /* addi! r2, offset */
1182 if (pc - cur_pc >= 2)
1183 {
1184 unsigned int save_v = inst->v;
1185 inst_t *inst2;
1186
1187 cur_pc += inst->len;
1188 inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
1189 byte_order);
1190
1191 if (inst2->len == 2
1192 && G_FLD (inst2->v, 14, 10) == 0x10
1193 && G_FLD (inst2->v, 9, 5) == 0x0
1194 && G_FLD (inst2->v, 4, 0) == 0x2)
1195 {
1196 /* mv! r0, r2 */
1197 int imm = G_FLD (inst->v, 5, 0);
1198 if (imm >> 5)
1199 imm = -(0x3F - imm + 1);
1200 sp_offset -= imm;
1201 }
1202 }
1203 }
1204 }
1205 else if (inst->len == 4)
1206 {
1207 if (G_FLD (inst->v, 29, 25) == 0x3
1208 && G_FLD (inst->v, 2, 0) == 0x4
1209 && G_FLD (inst->v, 24, 20) == 0x3
1210 && G_FLD (inst->v, 19, 15) == 0x0)
1211 {
1212 /* sw r3, [r0, offset]+ */
1213 sp_offset += inst->len;
1214 if (ra_offset_p == 0)
1215 {
1216 ra_offset = sp_offset;
1217 ra_offset_p = 1;
1218 }
1219 }
1220 else if (G_FLD (inst->v, 29, 25) == 0x3
1221 && G_FLD (inst->v, 2, 0) == 0x4
1222 && G_FLD (inst->v, 24, 20) == 0x2
1223 && G_FLD (inst->v, 19, 15) == 0x0)
1224 {
1225 /* sw r2, [r0, offset]+ */
1226 sp_offset += inst->len;
1227 if (fp_offset_p == 0)
1228 {
1229 fp_offset = sp_offset;
1230 fp_offset_p = 1;
1231 }
1232 }
1233 else if (G_FLD (inst->v, 29, 25) == 0x7
1234 && G_FLD (inst->v, 2, 0) == 0x0
1235 && G_FLD (inst->v, 24, 20) == 0x3
1236 && G_FLD (inst->v, 19, 15) == 0x0)
1237 {
1238 /* lw r3, [r0]+, 4 */
1239 sp_offset -= inst->len;
1240 ra_offset_p = 1;
1241 }
1242 else if (G_FLD (inst->v, 29, 25) == 0x7
1243 && G_FLD (inst->v, 2, 0) == 0x0
1244 && G_FLD (inst->v, 24, 20) == 0x2
1245 && G_FLD (inst->v, 19, 15) == 0x0)
1246 {
1247 /* lw r2, [r0]+, 4 */
1248 sp_offset -= inst->len;
1249 fp_offset_p = 1;
1250 }
1251 else if (G_FLD (inst->v, 29, 25) == 0x1
1252 && G_FLD (inst->v, 19, 17) == 0x0
1253 && G_FLD (inst->v, 24, 20) == 0x0
1254 && G_FLD (inst->v, 0, 0) == 0x0)
1255 {
1256 /* addi r0, -offset */
1257 int imm = G_FLD (inst->v, 16, 1);
1258 if (imm >> 15)
1259 imm = -(0xFFFF - imm + 1);
1260 sp_offset -= imm;
1261 }
1262 else if (G_FLD (inst->v, 29, 25) == 0x1
1263 && G_FLD (inst->v, 19, 17) == 0x0
1264 && G_FLD (inst->v, 24, 20) == 0x2
1265 && G_FLD (inst->v, 0, 0) == 0x0)
1266 {
1267 /* addi r2, offset */
1268 if (pc - cur_pc >= 2)
1269 {
1270 unsigned int save_v = inst->v;
1271 inst_t *inst2;
1272
1273 cur_pc += inst->len;
1274 inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
1275 byte_order);
1276
1277 if (inst2->len == 2
1278 && G_FLD (inst2->v, 14, 10) == 0x10
1279 && G_FLD (inst2->v, 9, 5) == 0x0
1280 && G_FLD (inst2->v, 4, 0) == 0x2)
1281 {
1282 /* mv! r0, r2 */
1283 int imm = G_FLD (inst->v, 16, 1);
1284 if (imm >> 15)
1285 imm = -(0xFFFF - imm + 1);
1286 sp_offset -= imm;
1287 }
1288 }
1289 }
1290 }
1291 }
1292
1293 /* Save RA. */
1294 if (ra_offset_p == 1)
1295 {
1296 if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
1297 this_cache->saved_regs[SCORE_PC_REGNUM].addr =
1298 sp + sp_offset - ra_offset;
1299 }
1300 else
1301 {
1302 this_cache->saved_regs[SCORE_PC_REGNUM] =
1303 this_cache->saved_regs[SCORE_RA_REGNUM];
1304 }
1305
1306 /* Save FP. */
1307 if (fp_offset_p == 1)
1308 {
1309 if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
1310 this_cache->saved_regs[SCORE_FP_REGNUM].addr =
1311 sp + sp_offset - fp_offset;
1312 }
1313
1314 /* Save SP and FP. */
1315 this_cache->base = sp + sp_offset;
1316 this_cache->fp = fp;
1317 }
1318
1319 static struct score_frame_cache *
1320 score_make_prologue_cache (struct frame_info *this_frame, void **this_cache)
1321 {
1322 struct score_frame_cache *cache;
1323
1324 if ((*this_cache) != NULL)
1325 return (*this_cache);
1326
1327 cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
1328 (*this_cache) = cache;
1329 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
1330
1331 /* Analyze the prologue. */
1332 {
1333 const CORE_ADDR pc = get_frame_pc (this_frame);
1334 CORE_ADDR start_addr;
1335
1336 find_pc_partial_function (pc, NULL, &start_addr, NULL);
1337 if (start_addr == 0)
1338 return cache;
1339
1340 if (target_mach == bfd_mach_score3)
1341 score3_analyze_prologue (start_addr, pc, this_frame, *this_cache);
1342 else
1343 score7_analyze_prologue (start_addr, pc, this_frame, *this_cache);
1344 }
1345
1346 /* Save SP. */
1347 trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
1348
1349 return (*this_cache);
1350 }
1351
1352 static void
1353 score_prologue_this_id (struct frame_info *this_frame, void **this_cache,
1354 struct frame_id *this_id)
1355 {
1356 struct score_frame_cache *info = score_make_prologue_cache (this_frame,
1357 this_cache);
1358 (*this_id) = frame_id_build (info->base, get_frame_func (this_frame));
1359 }
1360
1361 static struct value *
1362 score_prologue_prev_register (struct frame_info *this_frame,
1363 void **this_cache, int regnum)
1364 {
1365 struct score_frame_cache *info = score_make_prologue_cache (this_frame,
1366 this_cache);
1367 return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
1368 }
1369
1370 static const struct frame_unwind score_prologue_unwind =
1371 {
1372 NORMAL_FRAME,
1373 default_frame_unwind_stop_reason,
1374 score_prologue_this_id,
1375 score_prologue_prev_register,
1376 NULL,
1377 default_frame_sniffer,
1378 NULL
1379 };
1380
1381 static CORE_ADDR
1382 score_prologue_frame_base_address (struct frame_info *this_frame,
1383 void **this_cache)
1384 {
1385 struct score_frame_cache *info =
1386 score_make_prologue_cache (this_frame, this_cache);
1387 return info->fp;
1388 }
1389
1390 static const struct frame_base score_prologue_frame_base =
1391 {
1392 &score_prologue_unwind,
1393 score_prologue_frame_base_address,
1394 score_prologue_frame_base_address,
1395 score_prologue_frame_base_address,
1396 };
1397
1398 static const struct frame_base *
1399 score_prologue_frame_base_sniffer (struct frame_info *this_frame)
1400 {
1401 return &score_prologue_frame_base;
1402 }
1403
1404 /* Core file support. */
1405
1406 static const struct regcache_map_entry score7_linux_gregmap[] =
1407 {
1408 /* FIXME: According to the current Linux kernel, r0 is preceded by
1409 9 rather than 7 words. */
1410 { 7, REGCACHE_MAP_SKIP, 4 },
1411 { 32, 0, 4 }, /* r0 ... r31 */
1412 { 1, 55, 4 }, /* CEL */
1413 { 1, 54, 4 }, /* CEH */
1414 { 1, 53, 4 }, /* sr0, i.e. cnt or COUNTER */
1415 { 1, 52, 4 }, /* sr1, i.e. lcr or LDCR */
1416 { 1, 51, 4 }, /* sr2, i.e. scr or STCR */
1417 { 1, 49, 4 }, /* PC (same slot as EPC) */
1418 { 1, 38, 4 }, /* EMA */
1419 { 1, 32, 4 }, /* PSR */
1420 { 1, 34, 4 }, /* ECR */
1421 { 1, 33, 4 }, /* COND */
1422 { 0 }
1423 };
1424
1425 #define SCORE7_LINUX_EPC_OFFSET (44 * 4)
1426 #define SCORE7_LINUX_SIZEOF_GREGSET (49 * 4)
1427
1428 static void
1429 score7_linux_supply_gregset(const struct regset *regset,
1430 struct regcache *regcache,
1431 int regnum, const void *buf,
1432 size_t size)
1433 {
1434 regcache_supply_regset (regset, regcache, regnum, buf, size);
1435
1436 /* Supply the EPC from the same slot as the PC. Note that the
1437 collect function will store the PC in that slot. */
1438 if ((regnum == -1 || regnum == SCORE_EPC_REGNUM)
1439 && size >= SCORE7_LINUX_EPC_OFFSET + 4)
1440 regcache_raw_supply (regcache, SCORE_EPC_REGNUM,
1441 (const gdb_byte *) buf
1442 + SCORE7_LINUX_EPC_OFFSET);
1443 }
1444
1445 static const struct regset score7_linux_gregset =
1446 {
1447 score7_linux_gregmap,
1448 score7_linux_supply_gregset,
1449 regcache_collect_regset
1450 };
1451
1452 /* Iterate over core file register note sections. */
1453
1454 static void
1455 score7_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
1456 iterate_over_regset_sections_cb *cb,
1457 void *cb_data,
1458 const struct regcache *regcache)
1459 {
1460 cb (".reg", SCORE7_LINUX_SIZEOF_GREGSET, &score7_linux_gregset,
1461 NULL, cb_data);
1462 }
1463
1464 static struct gdbarch *
1465 score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1466 {
1467 struct gdbarch *gdbarch;
1468 target_mach = info.bfd_arch_info->mach;
1469
1470 arches = gdbarch_list_lookup_by_info (arches, &info);
1471 if (arches != NULL)
1472 {
1473 return (arches->gdbarch);
1474 }
1475 gdbarch = gdbarch_alloc (&info, NULL);
1476
1477 set_gdbarch_short_bit (gdbarch, 16);
1478 set_gdbarch_int_bit (gdbarch, 32);
1479 set_gdbarch_float_bit (gdbarch, 32);
1480 set_gdbarch_double_bit (gdbarch, 64);
1481 set_gdbarch_long_double_bit (gdbarch, 64);
1482 #if WITH_SIM
1483 set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
1484 #endif
1485 set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
1486 set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
1487 set_gdbarch_adjust_breakpoint_address (gdbarch,
1488 score_adjust_breakpoint_address);
1489 set_gdbarch_register_type (gdbarch, score_register_type);
1490 set_gdbarch_frame_align (gdbarch, score_frame_align);
1491 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1492 set_gdbarch_unwind_sp (gdbarch, score_unwind_sp);
1493 set_gdbarch_unwind_pc (gdbarch, score_unwind_pc);
1494 set_gdbarch_print_insn (gdbarch, score_print_insn);
1495
1496 switch (target_mach)
1497 {
1498 case bfd_mach_score7:
1499 set_gdbarch_breakpoint_from_pc (gdbarch, score7_breakpoint_from_pc);
1500 set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue);
1501 set_gdbarch_stack_frame_destroyed_p (gdbarch,
1502 score7_stack_frame_destroyed_p);
1503 set_gdbarch_register_name (gdbarch, score7_register_name);
1504 set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS);
1505 /* Core file support. */
1506 set_gdbarch_iterate_over_regset_sections
1507 (gdbarch, score7_linux_iterate_over_regset_sections);
1508 break;
1509
1510 case bfd_mach_score3:
1511 set_gdbarch_breakpoint_from_pc (gdbarch, score3_breakpoint_from_pc);
1512 set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue);
1513 set_gdbarch_stack_frame_destroyed_p (gdbarch,
1514 score3_stack_frame_destroyed_p);
1515 set_gdbarch_register_name (gdbarch, score3_register_name);
1516 set_gdbarch_num_regs (gdbarch, SCORE3_NUM_REGS);
1517 break;
1518 }
1519
1520 /* Watchpoint hooks. */
1521 set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
1522
1523 /* Dummy frame hooks. */
1524 set_gdbarch_return_value (gdbarch, score_return_value);
1525 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1526 set_gdbarch_dummy_id (gdbarch, score_dummy_id);
1527 set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
1528
1529 /* Normal frame hooks. */
1530 dwarf2_append_unwinders (gdbarch);
1531 frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
1532 frame_unwind_append_unwinder (gdbarch, &score_prologue_unwind);
1533 frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
1534
1535 return gdbarch;
1536 }
1537
1538 extern initialize_file_ftype _initialize_score_tdep;
1539
1540 void
1541 _initialize_score_tdep (void)
1542 {
1543 gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);
1544 }
GDB Binutils - Deliverables
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