1 /* Target-dependent code for the S+core architecture, for GDB,
4 Copyright (C) 2006-2014 Free Software Foundation, Inc.
6 Contributed by Qinwei (qinwei@sunnorth.com.cn)
7 Contributed by Ching-Peng Lin (cplin@sunplus.com)
9 This file is part of GDB.
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.
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.
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/>. */
30 #include "arch-utils.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"
40 #define G_FLD(_i,_ms,_ls) \
41 ((unsigned)((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls)))
45 unsigned long long raw;
49 struct score_frame_cache
53 struct trad_frame_saved_reg *saved_regs;
56 static int target_mach = bfd_mach_score7;
59 score_register_type (struct gdbarch *gdbarch, int regnum)
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;
68 score_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
70 return frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
74 score_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
76 return frame_unwind_register_unsigned (next_frame, SCORE_PC_REGNUM);
80 score7_register_name (struct gdbarch *gdbarch, int regnum)
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",
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",
95 gdb_assert (regnum >= 0 && regnum < SCORE7_NUM_REGS);
96 return score_register_names[regnum];
100 score3_register_name (struct gdbarch *gdbarch, int regnum)
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",
108 "PSR", "COND", "ECR", "EXCPVEC", "CCR",
109 "EPC", "EMA", "PREV", "DREG", "DSAVE",
110 "COUNTER", "LDCR", "STCR", "CEH", "CEL",
114 gdb_assert (regnum >= 0 && regnum < SCORE3_NUM_REGS);
115 return score_register_names[regnum];
120 score_register_sim_regno (struct gdbarch *gdbarch, int regnum)
122 gdb_assert (regnum >= 0
123 && regnum < ((target_mach == bfd_mach_score7)
124 ? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
130 score_print_insn (bfd_vma memaddr, struct disassemble_info *info)
132 if (info->endian == BFD_ENDIAN_BIG)
133 return print_insn_big_score (memaddr, info);
135 return print_insn_little_score (memaddr, info);
139 score7_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, gdb_byte *memblock)
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 };
147 if (target_has_execution && memblock != NULL)
149 /* Fetch instruction from local MEMBLOCK. */
150 memcpy (buf, memblock, SCORE_INSTLEN);
154 /* Fetch instruction from target. */
155 ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
158 error (_("Error: target_read_memory in file:%s, line:%d!"),
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);
170 if (big ^ ((addr & 0x2) == 2))
171 inst.v = G_FLD (inst.v, 29, 15);
173 inst.v = G_FLD (inst.v, 14, 0);
179 score3_adjust_pc_and_fetch_inst (CORE_ADDR *pcptr, int *lenptr,
180 enum bfd_endian byte_order)
182 static inst_t inst = { 0, 0, 0 };
189 /* raw table 1 (column 2, 3, 4)
193 table 2 (column 1, 2, 3)
199 static const struct breakplace bk_table[16] =
221 #define EXTRACT_LEN 2
222 CORE_ADDR adjust_pc = *pcptr & ~0x1;
223 gdb_byte buf[5][EXTRACT_LEN] =
233 unsigned int cbits = 0;
242 for (i = 0; i < 5; i++)
244 ret = target_read_memory (adjust_pc + 2 * i, buf[i], EXTRACT_LEN);
250 error (_("Error: target_read_memory in file:%s, line:%d!"),
254 raw = extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
255 cbits = (cbits << 1) | (raw >> 15);
262 cbits = (cbits >> 1) & 0x7;
268 cbits = (cbits >> 2) & 0x7;
269 bk_index = cbits + 8;
272 gdb_assert (!((bk_table[bk_index].break_offset == 0)
273 && (bk_table[bk_index].inst_len == 0)));
275 inst.len = bk_table[bk_index].inst_len;
277 i = (bk_table[bk_index].break_offset + 4) / 2;
278 count = inst.len / 2;
279 for (; count > 0; i++, count--)
281 inst.raw = (inst.raw << 16)
282 | extract_unsigned_integer (buf[i], EXTRACT_LEN, byte_order);
288 inst.v = inst.raw & 0x7FFF;
291 inst.v = ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
294 inst.v = ((inst.raw >> 32 & 0x7FFF) << 30)
295 | ((inst.raw >> 16 & 0x7FFF) << 15) | (inst.raw & 0x7FFF);
300 *pcptr = adjust_pc + bk_table[bk_index].break_offset;
302 *lenptr = bk_table[bk_index].inst_len;
309 static const gdb_byte *
310 score7_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
313 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
314 gdb_byte buf[SCORE_INSTLEN] = { 0 };
318 if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
320 error (_("Error: target_read_memory in file:%s, line:%d!"),
323 raw = extract_unsigned_integer (buf, SCORE_INSTLEN, byte_order);
325 if (byte_order == BFD_ENDIAN_BIG)
327 if (!(raw & 0x80008000))
329 /* 16bits instruction. */
330 static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
332 *lenptr = sizeof (big_breakpoint16);
333 return big_breakpoint16;
337 /* 32bits instruction. */
338 static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
340 *lenptr = sizeof (big_breakpoint32);
341 return big_breakpoint32;
346 if (!(raw & 0x80008000))
348 /* 16bits instruction. */
349 static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
351 *lenptr = sizeof (little_breakpoint16);
352 return little_breakpoint16;
356 /* 32bits instruction. */
357 static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
359 *lenptr = sizeof (little_breakpoint32);
360 return little_breakpoint32;
365 static const gdb_byte *
366 score3_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
369 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
370 CORE_ADDR adjust_pc = *pcptr;
372 static gdb_byte score_break_insns[6][6] = {
373 /* The following three instructions are big endian. */
375 { 0x80, 0x00, 0x00, 0x06 },
376 { 0x80, 0x00, 0x80, 0x00, 0x00, 0x00 },
377 /* The following three instructions are little endian. */
379 { 0x00, 0x80, 0x06, 0x00 },
380 { 0x00, 0x80, 0x00, 0x80, 0x00, 0x00 }};
385 score3_adjust_pc_and_fetch_inst (&adjust_pc, &len, byte_order);
387 index = ((byte_order == BFD_ENDIAN_BIG) ? 0 : 3) + (len / 2 - 1);
388 p = score_break_insns[index];
397 score_adjust_breakpoint_address (struct gdbarch *gdbarch, CORE_ADDR bpaddr)
399 CORE_ADDR adjust_pc = bpaddr;
401 if (target_mach == bfd_mach_score3)
402 score3_adjust_pc_and_fetch_inst (&adjust_pc, NULL,
403 gdbarch_byte_order (gdbarch));
405 adjust_pc = align_down (adjust_pc, 2);
411 score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
413 return align_down (addr, 16);
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)
422 gdb_assert (regnum >= 0
423 && regnum < ((target_mach == bfd_mach_score7)
424 ? SCORE7_NUM_REGS : SCORE3_NUM_REGS));
429 reg_offset = SCORE_REGSIZE - length;
431 case BFD_ENDIAN_LITTLE:
434 case BFD_ENDIAN_UNKNOWN:
438 error (_("Error: score_xfer_register in file:%s, line:%d!"),
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);
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)
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;
463 for (offset = 0, regnum = SCORE_A0_REGNUM;
464 offset < TYPE_LENGTH (type);
465 offset += SCORE_REGSIZE, regnum++)
467 int xfer = SCORE_REGSIZE;
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);
475 return RETURN_VALUE_REGISTER_CONVENTION;
479 static struct frame_id
480 score_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
482 return frame_id_build (get_frame_register_unsigned (this_frame,
484 get_frame_pc (this_frame));
488 score_type_needs_double_align (struct type *type)
490 enum type_code typecode = TYPE_CODE (type);
492 if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
493 || (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
495 else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
499 n = TYPE_NFIELDS (type);
500 for (i = 0; i < n; i++)
501 if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i)))
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)
514 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
518 CORE_ADDR stack_offset = 0;
521 /* Step 1, Save RA. */
522 regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
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])),
530 sp -= align_up (arglen, 16);
532 argreg = SCORE_BEGIN_ARG_REGNUM;
534 /* Step 3, Check if struct return then save the struct address to
535 r4 and increase the stack_offset by 4. */
538 regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
539 stack_offset += SCORE_REGSIZE;
542 /* Step 4, Load arguments:
543 If arg length is too long (> 4 bytes), then split the arg and
545 for (argnum = 0; argnum < nargs; argnum++)
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;
555 arglen = TYPE_LENGTH (arg_type);
556 odd_sized_struct_p = (arglen > SCORE_REGSIZE
557 && arglen % SCORE_REGSIZE != 0);
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))
567 /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
568 the default "downward"/"upward" method:
574 char a; char b; char c;
575 } s = {'a', 'b', 'c'};
577 Big endian: s = {X, 'a', 'b', 'c'}
578 Little endian: s = {'a', 'b', 'c', X}
580 Where X is a hole. */
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);
591 int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
592 ULONGEST regval = extract_unsigned_integer (val, partial_len,
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);
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);
607 if (argreg <= SCORE_LAST_ARG_REGNUM)
609 regcache_cooked_write_unsigned (regcache, argreg++, regval);
610 if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
615 arglen -= partial_len;
616 stack_offset += align_up (partial_len, SCORE_REGSIZE);
620 /* Step 5, Save SP. */
621 regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
627 score7_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
630 int iscan = 32, stack_sub = 0;
633 inst_t *inst = score7_fetch_inst (gdbarch, cpc, NULL);
636 if ((inst->len == 4) && !stack_sub
637 && (G_FLD (inst->v, 29, 25) == 0x1
638 && G_FLD (inst->v, 24, 20) == 0x0))
640 /* addi r0, offset */
641 stack_sub = cpc + SCORE_INSTLEN;
642 pc = cpc + SCORE_INSTLEN;
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))
652 pc = cpc + SCORE_INSTLEN;
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))
662 pc = cpc + SCORE16_INSTLEN;
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! */
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 */
678 cpc += (inst->len == 2) ? SCORE16_INSTLEN : SCORE_INSTLEN;
684 score3_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
687 int iscan = 32, stack_sub = 0;
691 = score3_adjust_pc_and_fetch_inst (&cpc, NULL,
692 gdbarch_byte_order (gdbarch));
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))
701 /* addi r0, offset */
702 stack_sub = cpc + inst->len;
703 pc = cpc + inst->len;
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))
713 pc = cpc + inst->len;
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))
722 pc = cpc + inst->len;
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! */
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 */
741 score7_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
743 inst_t *inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
746 return 1; /* mv! r0, r2 */
747 else if (G_FLD (inst->v, 14, 12) == 0x2
748 && G_FLD (inst->v, 3, 0) == 0xa)
750 else if (G_FLD (inst->v, 14, 12) == 0x0
751 && G_FLD (inst->v, 7, 0) == 0x34)
752 return 1; /* br! r3 */
753 else if (G_FLD (inst->v, 29, 15) == 0x2
754 && G_FLD (inst->v, 6, 1) == 0x2b)
755 return 1; /* mv r0, r2 */
756 else if (G_FLD (inst->v, 29, 25) == 0x0
757 && G_FLD (inst->v, 6, 1) == 0x4
758 && G_FLD (inst->v, 19, 15) == 0x3)
759 return 1; /* br r3 */
765 score3_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
767 CORE_ADDR pc = cur_pc;
769 = score3_adjust_pc_and_fetch_inst (&pc, NULL,
770 gdbarch_byte_order (gdbarch));
773 && (G_FLD (inst->v, 14, 10) == 0x10)
774 && (G_FLD (inst->v, 9, 5) == 0x0)
775 && (G_FLD (inst->v, 4, 0) == 0x2))
776 return 1; /* mv! r0, r2 */
777 else if (inst->len == 4
778 && (G_FLD (inst->v, 29, 25) == 0x0)
779 && (G_FLD (inst->v, 24, 20) == 0x2)
780 && (G_FLD (inst->v, 19, 15) == 0x0)
781 && (G_FLD (inst->v, 14, 10) == 0xF)
782 && (G_FLD (inst->v, 9, 0) == 0x56))
783 return 1; /* mv r0, r2 */
784 else if (inst->len == 2
785 && (G_FLD (inst->v, 14, 12) == 0x0)
786 && (G_FLD (inst->v, 11, 5) == 0x2))
788 else if (inst->len == 2
789 && (G_FLD (inst->v, 14, 12) == 0x0)
790 && (G_FLD (inst->v, 11, 7) == 0x0)
791 && (G_FLD (inst->v, 6, 5) == 0x2))
792 return 1; /* rpop! */
793 else if (inst->len == 2
794 && (G_FLD (inst->v, 14, 12) == 0x0)
795 && (G_FLD (inst->v, 11, 5) == 0x4)
796 && (G_FLD (inst->v, 4, 0) == 0x3))
797 return 1; /* br! r3 */
798 else if (inst->len == 4
799 && (G_FLD (inst->v, 29, 25) == 0x0)
800 && (G_FLD (inst->v, 24, 20) == 0x0)
801 && (G_FLD (inst->v, 19, 15) == 0x3)
802 && (G_FLD (inst->v, 14, 10) == 0xF)
803 && (G_FLD (inst->v, 9, 0) == 0x8))
804 return 1; /* br r3 */
810 score7_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
813 gdb_byte *memblock = NULL;
817 error (_("Error: malloc size < 0 in file:%s, line:%d!"),
824 memblock = xmalloc (size);
825 memset (memblock, 0, size);
826 ret = target_read_memory (addr & ~0x3, memblock, size);
829 error (_("Error: target_read_memory in file:%s, line:%d!"),
837 score7_free_memblock (gdb_byte *memblock)
843 score7_adjust_memblock_ptr (gdb_byte **memblock, CORE_ADDR prev_pc,
848 /* First time call this function, do nothing. */
850 else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0)
852 /* First 16-bit instruction, then 32-bit instruction. */
853 *memblock += SCORE_INSTLEN;
855 else if (cur_pc - prev_pc == 4)
857 /* Is 32-bit instruction, increase MEMBLOCK by 4. */
858 *memblock += SCORE_INSTLEN;
863 score7_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
864 struct frame_info *this_frame,
865 struct score_frame_cache *this_cache)
867 struct gdbarch *gdbarch = get_frame_arch (this_frame);
870 CORE_ADDR cur_pc = startaddr;
879 gdb_byte *memblock = NULL;
880 gdb_byte *memblock_ptr = NULL;
881 CORE_ADDR prev_pc = -1;
883 /* Allocate MEMBLOCK if PC - STARTADDR > 0. */
884 memblock_ptr = memblock =
885 score7_malloc_and_get_memblock (startaddr, pc - startaddr);
887 sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
888 fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
890 for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
893 if (memblock != NULL)
895 /* Reading memory block from target succefully and got all
896 the instructions(from STARTADDR to PC) needed. */
897 score7_adjust_memblock_ptr (&memblock, prev_pc, cur_pc);
898 inst = score7_fetch_inst (gdbarch, cur_pc, memblock);
902 /* Otherwise, we fetch 4 bytes from target, and GDB also
904 inst = score7_fetch_inst (gdbarch, cur_pc, NULL);
907 /* FIXME: make a full-power prologue analyzer. */
910 inst_len = SCORE16_INSTLEN;
912 if (G_FLD (inst->v, 14, 12) == 0x2
913 && G_FLD (inst->v, 3, 0) == 0xe)
918 if (G_FLD (inst->v, 11, 7) == 0x6
922 ra_offset = sp_offset;
925 else if (G_FLD (inst->v, 11, 7) == 0x4
929 fp_offset = sp_offset;
933 else if (G_FLD (inst->v, 14, 12) == 0x2
934 && G_FLD (inst->v, 3, 0) == 0xa)
939 else if (G_FLD (inst->v, 14, 7) == 0xc1
940 && G_FLD (inst->v, 2, 0) == 0x0)
943 sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3));
945 else if (G_FLD (inst->v, 14, 7) == 0xc0
946 && G_FLD (inst->v, 2, 0) == 0x0)
949 sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3));
954 inst_len = SCORE_INSTLEN;
956 if (G_FLD(inst->v, 29, 25) == 0x3
957 && G_FLD(inst->v, 2, 0) == 0x4
958 && G_FLD(inst->v, 19, 15) == 0)
960 /* sw rD, [r0, offset]+ */
961 sp_offset += SCORE_INSTLEN;
963 if (G_FLD(inst->v, 24, 20) == 0x3)
966 if (ra_offset_p == 0)
968 ra_offset = sp_offset;
972 else if (G_FLD(inst->v, 24, 20) == 0x2)
975 if (fp_offset_p == 0)
977 fp_offset = sp_offset;
982 else if (G_FLD(inst->v, 29, 25) == 0x14
983 && G_FLD(inst->v, 19,15) == 0)
985 /* sw rD, [r0, offset] */
986 if (G_FLD(inst->v, 24, 20) == 0x3)
989 ra_offset = sp_offset - G_FLD(inst->v, 14, 0);
992 else if (G_FLD(inst->v, 24, 20) == 0x2)
995 fp_offset = sp_offset - G_FLD(inst->v, 14, 0);
999 else if (G_FLD (inst->v, 29, 15) == 0x1c60
1000 && G_FLD (inst->v, 2, 0) == 0x0)
1002 /* lw r3, [r0]+, 4 */
1003 sp_offset -= SCORE_INSTLEN;
1006 else if (G_FLD (inst->v, 29, 15) == 0x1c40
1007 && G_FLD (inst->v, 2, 0) == 0x0)
1009 /* lw r2, [r0]+, 4 */
1010 sp_offset -= SCORE_INSTLEN;
1014 else if (G_FLD (inst->v, 29, 17) == 0x100
1015 && G_FLD (inst->v, 0, 0) == 0x0)
1017 /* addi r0, -offset */
1018 sp_offset += 65536 - G_FLD (inst->v, 16, 1);
1020 else if (G_FLD (inst->v, 29, 17) == 0x110
1021 && G_FLD (inst->v, 0, 0) == 0x0)
1023 /* addi r2, offset */
1024 if (pc - cur_pc > 4)
1026 unsigned int save_v = inst->v;
1028 score7_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL);
1029 if (inst2->v == 0x23)
1032 sp_offset -= G_FLD (save_v, 16, 1);
1040 if (ra_offset_p == 1)
1042 if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
1043 this_cache->saved_regs[SCORE_PC_REGNUM].addr =
1044 sp + sp_offset - ra_offset;
1048 this_cache->saved_regs[SCORE_PC_REGNUM] =
1049 this_cache->saved_regs[SCORE_RA_REGNUM];
1053 if (fp_offset_p == 1)
1055 if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
1056 this_cache->saved_regs[SCORE_FP_REGNUM].addr =
1057 sp + sp_offset - fp_offset;
1060 /* Save SP and FP. */
1061 this_cache->base = sp + sp_offset;
1062 this_cache->fp = fp;
1064 /* Don't forget to free MEMBLOCK if we allocated it. */
1065 if (memblock_ptr != NULL)
1066 score7_free_memblock (memblock_ptr);
1070 score3_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
1071 struct frame_info *this_frame,
1072 struct score_frame_cache *this_cache)
1076 CORE_ADDR cur_pc = startaddr;
1077 enum bfd_endian byte_order
1078 = gdbarch_byte_order (get_frame_arch (this_frame));
1083 int ra_offset_p = 0;
1084 int fp_offset_p = 0;
1087 CORE_ADDR prev_pc = -1;
1089 sp = get_frame_register_unsigned (this_frame, SCORE_SP_REGNUM);
1090 fp = get_frame_register_unsigned (this_frame, SCORE_FP_REGNUM);
1092 for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
1094 inst_t *inst = NULL;
1096 inst = score3_adjust_pc_and_fetch_inst (&cur_pc, &inst_len, byte_order);
1098 /* FIXME: make a full-power prologue analyzer. */
1101 if (G_FLD (inst->v, 14, 12) == 0x0
1102 && G_FLD (inst->v, 11, 7) == 0x0
1103 && G_FLD (inst->v, 6, 5) == 0x3)
1108 if (G_FLD (inst->v, 4, 0) == 0x3
1109 && ra_offset_p == 0)
1111 /* push! r3, [r0] */
1112 ra_offset = sp_offset;
1115 else if (G_FLD (inst->v, 4, 0) == 0x2
1116 && fp_offset_p == 0)
1118 /* push! r2, [r0] */
1119 fp_offset = sp_offset;
1123 else if (G_FLD (inst->v, 14, 12) == 0x6
1124 && G_FLD (inst->v, 11, 10) == 0x3)
1127 int start_r = G_FLD (inst->v, 9, 5);
1128 int cnt = G_FLD (inst->v, 4, 0);
1130 if ((ra_offset_p == 0)
1131 && (start_r <= SCORE_RA_REGNUM)
1132 && (SCORE_RA_REGNUM < start_r + cnt))
1134 /* rpush! contains r3 */
1136 ra_offset = sp_offset + 4 * (SCORE_RA_REGNUM - start_r) + 4;
1139 if ((fp_offset_p == 0)
1140 && (start_r <= SCORE_FP_REGNUM)
1141 && (SCORE_FP_REGNUM < start_r + cnt))
1143 /* rpush! contains r2 */
1145 fp_offset = sp_offset + 4 * (SCORE_FP_REGNUM - start_r) + 4;
1148 sp_offset += 4 * cnt;
1150 else if (G_FLD (inst->v, 14, 12) == 0x0
1151 && G_FLD (inst->v, 11, 7) == 0x0
1152 && G_FLD (inst->v, 6, 5) == 0x2)
1157 else if (G_FLD (inst->v, 14, 12) == 0x6
1158 && G_FLD (inst->v, 11, 10) == 0x2)
1161 sp_offset -= 4 * G_FLD (inst->v, 4, 0);
1163 else if (G_FLD (inst->v, 14, 12) == 0x5
1164 && G_FLD (inst->v, 11, 10) == 0x3
1165 && G_FLD (inst->v, 9, 6) == 0x0)
1167 /* addi! r0, -offset */
1168 int imm = G_FLD (inst->v, 5, 0);
1170 imm = -(0x3F - imm + 1);
1173 else if (G_FLD (inst->v, 14, 12) == 0x5
1174 && G_FLD (inst->v, 11, 10) == 0x3
1175 && G_FLD (inst->v, 9, 6) == 0x2)
1177 /* addi! r2, offset */
1178 if (pc - cur_pc >= 2)
1180 unsigned int save_v = inst->v;
1183 cur_pc += inst->len;
1184 inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
1188 && G_FLD (inst2->v, 14, 10) == 0x10
1189 && G_FLD (inst2->v, 9, 5) == 0x0
1190 && G_FLD (inst2->v, 4, 0) == 0x2)
1193 int imm = G_FLD (inst->v, 5, 0);
1195 imm = -(0x3F - imm + 1);
1201 else if (inst->len == 4)
1203 if (G_FLD (inst->v, 29, 25) == 0x3
1204 && G_FLD (inst->v, 2, 0) == 0x4
1205 && G_FLD (inst->v, 24, 20) == 0x3
1206 && G_FLD (inst->v, 19, 15) == 0x0)
1208 /* sw r3, [r0, offset]+ */
1209 sp_offset += inst->len;
1210 if (ra_offset_p == 0)
1212 ra_offset = sp_offset;
1216 else if (G_FLD (inst->v, 29, 25) == 0x3
1217 && G_FLD (inst->v, 2, 0) == 0x4
1218 && G_FLD (inst->v, 24, 20) == 0x2
1219 && G_FLD (inst->v, 19, 15) == 0x0)
1221 /* sw r2, [r0, offset]+ */
1222 sp_offset += inst->len;
1223 if (fp_offset_p == 0)
1225 fp_offset = sp_offset;
1229 else if (G_FLD (inst->v, 29, 25) == 0x7
1230 && G_FLD (inst->v, 2, 0) == 0x0
1231 && G_FLD (inst->v, 24, 20) == 0x3
1232 && G_FLD (inst->v, 19, 15) == 0x0)
1234 /* lw r3, [r0]+, 4 */
1235 sp_offset -= inst->len;
1238 else if (G_FLD (inst->v, 29, 25) == 0x7
1239 && G_FLD (inst->v, 2, 0) == 0x0
1240 && G_FLD (inst->v, 24, 20) == 0x2
1241 && G_FLD (inst->v, 19, 15) == 0x0)
1243 /* lw r2, [r0]+, 4 */
1244 sp_offset -= inst->len;
1247 else if (G_FLD (inst->v, 29, 25) == 0x1
1248 && G_FLD (inst->v, 19, 17) == 0x0
1249 && G_FLD (inst->v, 24, 20) == 0x0
1250 && G_FLD (inst->v, 0, 0) == 0x0)
1252 /* addi r0, -offset */
1253 int imm = G_FLD (inst->v, 16, 1);
1255 imm = -(0xFFFF - imm + 1);
1258 else if (G_FLD (inst->v, 29, 25) == 0x1
1259 && G_FLD (inst->v, 19, 17) == 0x0
1260 && G_FLD (inst->v, 24, 20) == 0x2
1261 && G_FLD (inst->v, 0, 0) == 0x0)
1263 /* addi r2, offset */
1264 if (pc - cur_pc >= 2)
1266 unsigned int save_v = inst->v;
1269 cur_pc += inst->len;
1270 inst2 = score3_adjust_pc_and_fetch_inst (&cur_pc, NULL,
1274 && G_FLD (inst2->v, 14, 10) == 0x10
1275 && G_FLD (inst2->v, 9, 5) == 0x0
1276 && G_FLD (inst2->v, 4, 0) == 0x2)
1279 int imm = G_FLD (inst->v, 16, 1);
1281 imm = -(0xFFFF - imm + 1);
1290 if (ra_offset_p == 1)
1292 if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
1293 this_cache->saved_regs[SCORE_PC_REGNUM].addr =
1294 sp + sp_offset - ra_offset;
1298 this_cache->saved_regs[SCORE_PC_REGNUM] =
1299 this_cache->saved_regs[SCORE_RA_REGNUM];
1303 if (fp_offset_p == 1)
1305 if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
1306 this_cache->saved_regs[SCORE_FP_REGNUM].addr =
1307 sp + sp_offset - fp_offset;
1310 /* Save SP and FP. */
1311 this_cache->base = sp + sp_offset;
1312 this_cache->fp = fp;
1315 static struct score_frame_cache *
1316 score_make_prologue_cache (struct frame_info *this_frame, void **this_cache)
1318 struct score_frame_cache *cache;
1320 if ((*this_cache) != NULL)
1321 return (*this_cache);
1323 cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
1324 (*this_cache) = cache;
1325 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
1327 /* Analyze the prologue. */
1329 const CORE_ADDR pc = get_frame_pc (this_frame);
1330 CORE_ADDR start_addr;
1332 find_pc_partial_function (pc, NULL, &start_addr, NULL);
1333 if (start_addr == 0)
1336 if (target_mach == bfd_mach_score3)
1337 score3_analyze_prologue (start_addr, pc, this_frame, *this_cache);
1339 score7_analyze_prologue (start_addr, pc, this_frame, *this_cache);
1343 trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
1345 return (*this_cache);
1349 score_prologue_this_id (struct frame_info *this_frame, void **this_cache,
1350 struct frame_id *this_id)
1352 struct score_frame_cache *info = score_make_prologue_cache (this_frame,
1354 (*this_id) = frame_id_build (info->base, get_frame_func (this_frame));
1357 static struct value *
1358 score_prologue_prev_register (struct frame_info *this_frame,
1359 void **this_cache, int regnum)
1361 struct score_frame_cache *info = score_make_prologue_cache (this_frame,
1363 return trad_frame_get_prev_register (this_frame, info->saved_regs, regnum);
1366 static const struct frame_unwind score_prologue_unwind =
1369 default_frame_unwind_stop_reason,
1370 score_prologue_this_id,
1371 score_prologue_prev_register,
1373 default_frame_sniffer,
1378 score_prologue_frame_base_address (struct frame_info *this_frame,
1381 struct score_frame_cache *info =
1382 score_make_prologue_cache (this_frame, this_cache);
1386 static const struct frame_base score_prologue_frame_base =
1388 &score_prologue_unwind,
1389 score_prologue_frame_base_address,
1390 score_prologue_frame_base_address,
1391 score_prologue_frame_base_address,
1394 static const struct frame_base *
1395 score_prologue_frame_base_sniffer (struct frame_info *this_frame)
1397 return &score_prologue_frame_base;
1400 /* Core file support. */
1402 static const struct regcache_map_entry score7_linux_gregmap[] =
1404 /* FIXME: According to the current Linux kernel, r0 is preceded by
1405 9 rather than 7 words. */
1406 { 7, REGCACHE_MAP_SKIP, 4 },
1407 { 32, 0, 4 }, /* r0 ... r31 */
1408 { 1, 55, 4 }, /* CEL */
1409 { 1, 54, 4 }, /* CEH */
1410 { 1, 53, 4 }, /* sr0, i.e. cnt or COUNTER */
1411 { 1, 52, 4 }, /* sr1, i.e. lcr or LDCR */
1412 { 1, 51, 4 }, /* sr2, i.e. scr or STCR */
1413 { 1, 49, 4 }, /* PC (same slot as EPC) */
1414 { 1, 38, 4 }, /* EMA */
1415 { 1, 32, 4 }, /* PSR */
1416 { 1, 34, 4 }, /* ECR */
1417 { 1, 33, 4 }, /* COND */
1421 #define SCORE7_LINUX_EPC_OFFSET (44 * 4)
1422 #define SCORE7_LINUX_SIZEOF_GREGSET (49 * 4)
1425 score7_linux_supply_gregset(const struct regset *regset,
1426 struct regcache *regcache,
1427 int regnum, const void *buf,
1430 regcache_supply_regset (regset, regcache, regnum, buf, size);
1432 /* Supply the EPC from the same slot as the PC. Note that the
1433 collect function will store the PC in that slot. */
1434 if ((regnum == -1 || regnum == SCORE_EPC_REGNUM)
1435 && size >= SCORE7_LINUX_EPC_OFFSET + 4)
1436 regcache_raw_supply (regcache, SCORE_EPC_REGNUM,
1437 (const gdb_byte *) buf
1438 + SCORE7_LINUX_EPC_OFFSET);
1441 static const struct regset score7_linux_gregset =
1443 score7_linux_gregmap,
1444 score7_linux_supply_gregset,
1445 regcache_collect_regset
1448 /* Iterate over core file register note sections. */
1451 score7_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
1452 iterate_over_regset_sections_cb *cb,
1454 const struct regcache *regcache)
1456 cb (".reg", SCORE7_LINUX_SIZEOF_GREGSET, &score7_linux_gregset,
1460 static struct gdbarch *
1461 score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1463 struct gdbarch *gdbarch;
1464 target_mach = info.bfd_arch_info->mach;
1466 arches = gdbarch_list_lookup_by_info (arches, &info);
1469 return (arches->gdbarch);
1471 gdbarch = gdbarch_alloc (&info, NULL);
1473 set_gdbarch_short_bit (gdbarch, 16);
1474 set_gdbarch_int_bit (gdbarch, 32);
1475 set_gdbarch_float_bit (gdbarch, 32);
1476 set_gdbarch_double_bit (gdbarch, 64);
1477 set_gdbarch_long_double_bit (gdbarch, 64);
1479 set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
1481 set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
1482 set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
1483 set_gdbarch_adjust_breakpoint_address (gdbarch,
1484 score_adjust_breakpoint_address);
1485 set_gdbarch_register_type (gdbarch, score_register_type);
1486 set_gdbarch_frame_align (gdbarch, score_frame_align);
1487 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1488 set_gdbarch_unwind_sp (gdbarch, score_unwind_sp);
1489 set_gdbarch_unwind_pc (gdbarch, score_unwind_pc);
1490 set_gdbarch_print_insn (gdbarch, score_print_insn);
1492 switch (target_mach)
1494 case bfd_mach_score7:
1495 set_gdbarch_breakpoint_from_pc (gdbarch, score7_breakpoint_from_pc);
1496 set_gdbarch_skip_prologue (gdbarch, score7_skip_prologue);
1497 set_gdbarch_in_function_epilogue_p (gdbarch,
1498 score7_in_function_epilogue_p);
1499 set_gdbarch_register_name (gdbarch, score7_register_name);
1500 set_gdbarch_num_regs (gdbarch, SCORE7_NUM_REGS);
1501 /* Core file support. */
1502 set_gdbarch_iterate_over_regset_sections
1503 (gdbarch, score7_linux_iterate_over_regset_sections);
1506 case bfd_mach_score3:
1507 set_gdbarch_breakpoint_from_pc (gdbarch, score3_breakpoint_from_pc);
1508 set_gdbarch_skip_prologue (gdbarch, score3_skip_prologue);
1509 set_gdbarch_in_function_epilogue_p (gdbarch,
1510 score3_in_function_epilogue_p);
1511 set_gdbarch_register_name (gdbarch, score3_register_name);
1512 set_gdbarch_num_regs (gdbarch, SCORE3_NUM_REGS);
1516 /* Watchpoint hooks. */
1517 set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
1519 /* Dummy frame hooks. */
1520 set_gdbarch_return_value (gdbarch, score_return_value);
1521 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1522 set_gdbarch_dummy_id (gdbarch, score_dummy_id);
1523 set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
1525 /* Normal frame hooks. */
1526 dwarf2_append_unwinders (gdbarch);
1527 frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
1528 frame_unwind_append_unwinder (gdbarch, &score_prologue_unwind);
1529 frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
1534 extern initialize_file_ftype _initialize_score_tdep;
1537 _initialize_score_tdep (void)
1539 gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);