1 /* Target-dependent code for the S+core architecture, for GDB,
4 Copyright (C) 2006, 2007, 2008 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/>. */
25 #include "gdb_assert.h"
31 #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) (((_i) << (31 - (_ms))) >> (31 - (_ms) + (_ls)))
41 #define RM_PBITS(_raw) ((G_FLD(_raw, 31, 16) << 15) | G_FLD(_raw, 14, 0))
49 struct score_frame_cache
53 struct trad_frame_saved_reg *saved_regs;
57 /* If S+core GCC will generate these instructions in the prologue:
63 then .pdr section is used. */
74 typedef struct frame_extra_info
77 unsigned int pdr[P_SIZE];
89 score_compare_pdr_entries (const void *a, const void *b)
91 CORE_ADDR lhs = bfd_get_32 (the_bfd, (bfd_byte *) a);
92 CORE_ADDR rhs = bfd_get_32 (the_bfd, (bfd_byte *) b);
102 score_analyze_pdr_section (CORE_ADDR startaddr, CORE_ADDR pc,
103 struct frame_info *next_frame,
104 struct score_frame_cache *this_cache)
107 struct obj_section *sec;
108 extra_info_t *fci_ext;
109 CORE_ADDR leaf_ra_stack_addr = -1;
111 gdb_assert (startaddr <= pc);
112 gdb_assert (this_cache != NULL);
114 fci_ext = frame_obstack_zalloc (sizeof (extra_info_t));
115 if ((sec = find_pc_section (pc)) == NULL)
117 error ("Error: Can't find section in file:%s, line:%d!",
122 /* Anylyze .pdr section and get coresponding fields. */
124 static struct obj_priv *priv = NULL;
129 priv = obstack_alloc (&sec->objfile->objfile_obstack,
130 sizeof (struct obj_priv));
131 if ((bfdsec = bfd_get_section_by_name (sec->objfile->obfd, ".pdr")))
133 priv->size = bfd_section_size (sec->objfile->obfd, bfdsec);
134 priv->contents = obstack_alloc (&sec->objfile->objfile_obstack,
136 bfd_get_section_contents (sec->objfile->obfd, bfdsec,
137 priv->contents, 0, priv->size);
138 the_bfd = sec->objfile->obfd;
139 qsort (priv->contents, priv->size / 32, 32,
140 score_compare_pdr_entries);
148 int low = 0, mid, high = priv->size / 32;
153 mid = (low + high) / 2;
154 ptr = priv->contents + mid * 32;
155 pdr_pc = bfd_get_signed_32 (sec->objfile->obfd, ptr);
156 pdr_pc += ANOFFSET (sec->objfile->section_offsets,
157 SECT_OFF_TEXT (sec->objfile));
158 if (pdr_pc == startaddr)
160 if (pdr_pc > startaddr)
169 gdb_assert (bfd_get_32 (sec->objfile->obfd, ptr) == startaddr);
170 #define EXT_PDR(_pi) bfd_get_32(sec->objfile->obfd, ptr+((_pi)<<2))
171 fci_ext->pdr[PI_SYM] = EXT_PDR (PI_SYM);
172 fci_ext->pdr[PI_R_MSK] = EXT_PDR (PI_R_MSK);
173 fci_ext->pdr[PI_R_OFF] = EXT_PDR (PI_R_OFF);
174 fci_ext->pdr[PI_R_LEF] = EXT_PDR (PI_R_LEF);
175 fci_ext->pdr[PI_F_OFF] = EXT_PDR (PI_F_OFF);
176 fci_ext->pdr[PI_F_REG] = EXT_PDR (PI_F_REG);
177 fci_ext->pdr[PI_RAREG] = EXT_PDR (PI_RAREG);
186 /* Open these functions if build with simulator. */
189 score_target_can_use_watch (int type, int cnt, int othertype)
191 if (strcmp (current_target.to_shortname, "sim") == 0)
193 return soc_gh_can_use_watch (type, cnt);
197 return (*current_target.to_can_use_hw_breakpoint) (type, cnt, othertype);
202 score_stopped_by_watch (void)
204 if (strcmp (current_target.to_shortname, "sim") == 0)
206 return soc_gh_stopped_by_watch ();
210 return (*current_target.to_stopped_by_watchpoint) ();
215 score_target_insert_watchpoint (CORE_ADDR addr, int len, int type)
217 if (strcmp (current_target.to_shortname, "sim") == 0)
219 return soc_gh_add_watch (addr, len, type);
223 return (*current_target.to_insert_watchpoint) (addr, len, type);
228 score_target_remove_watchpoint (CORE_ADDR addr, int len, int type)
230 if (strcmp (current_target.to_shortname, "sim") == 0)
232 return soc_gh_del_watch (addr, len, type);
236 return (*current_target.to_remove_watchpoint) (addr, len, type);
241 score_target_insert_hw_breakpoint (struct bp_target_info * bp_tgt)
243 if (strcmp (current_target.to_shortname, "sim") == 0)
245 return soc_gh_add_hardbp (bp_tgt->placed_address);
249 return (*current_target.to_insert_hw_breakpoint) (bp_tgt);
254 score_target_remove_hw_breakpoint (struct bp_target_info * bp_tgt)
256 if (strcmp (current_target.to_shortname, "sim") == 0)
258 return soc_gh_del_hardbp (bp_tgt->placed_address);
262 return (*current_target.to_remove_hw_breakpoint) (bp_tgt);
268 score_register_type (struct gdbarch *gdbarch, int regnum)
270 gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
271 return builtin_type_uint32;
275 score_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
277 return frame_unwind_register_unsigned (next_frame, SCORE_PC_REGNUM);
281 score_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
283 return frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
287 score_register_name (struct gdbarch *gdbarch, int regnum)
289 const char *score_register_names[] = {
290 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
291 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
292 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
293 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
295 "PSR", "COND", "ECR", "EXCPVEC",
296 "CCR", "EPC", "EMA", "TLBLOCK",
297 "TLBPT", "PEADDR", "TLBRPT", "PEVN",
298 "PECTX", "LIMPFN", "LDMPFN", "PREV",
299 "DREG", "PC", "DSAVE", "COUNTER",
300 "LDCR", "STCR", "CEH", "CEL",
303 gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
304 return score_register_names[regnum];
308 score_register_sim_regno (struct gdbarch *gdbarch, int regnum)
310 gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
315 score_print_insn (bfd_vma memaddr, struct disassemble_info *info)
317 if (info->endian == BFD_ENDIAN_BIG)
318 return print_insn_big_score (memaddr, info);
320 return print_insn_little_score (memaddr, info);
323 static const gdb_byte *
324 score_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr,
327 gdb_byte buf[SCORE_INSTLEN] = { 0 };
331 if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
333 error ("Error: target_read_memory in file:%s, line:%d!",
336 raw = extract_unsigned_integer (buf, SCORE_INSTLEN);
338 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
340 if (!(raw & 0x80008000))
342 /* 16bits instruction. */
343 static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
345 *lenptr = sizeof (big_breakpoint16);
346 return big_breakpoint16;
350 /* 32bits instruction. */
351 static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
353 *lenptr = sizeof (big_breakpoint32);
354 return big_breakpoint32;
359 if (!(raw & 0x80008000))
361 /* 16bits instruction. */
362 static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
364 *lenptr = sizeof (little_breakpoint16);
365 return little_breakpoint16;
369 /* 32bits instruction. */
370 static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
372 *lenptr = sizeof (little_breakpoint32);
373 return little_breakpoint32;
379 score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
381 return align_down (addr, 16);
385 score_xfer_register (struct regcache *regcache, int regnum, int length,
386 enum bfd_endian endian, gdb_byte *readbuf,
387 const gdb_byte *writebuf, int buf_offset)
390 gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
395 reg_offset = SCORE_REGSIZE - length;
397 case BFD_ENDIAN_LITTLE:
400 case BFD_ENDIAN_UNKNOWN:
404 error ("Error: score_xfer_register in file:%s, line:%d!",
409 regcache_cooked_read_part (regcache, regnum, reg_offset, length,
410 readbuf + buf_offset);
411 if (writebuf != NULL)
412 regcache_cooked_write_part (regcache, regnum, reg_offset, length,
413 writebuf + buf_offset);
416 static enum return_value_convention
417 score_return_value (struct gdbarch *gdbarch, struct type *func_type,
418 struct type *type, struct regcache *regcache,
419 gdb_byte * readbuf, const gdb_byte * writebuf)
421 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
422 || TYPE_CODE (type) == TYPE_CODE_UNION
423 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
424 return RETURN_VALUE_STRUCT_CONVENTION;
429 for (offset = 0, regnum = SCORE_A0_REGNUM;
430 offset < TYPE_LENGTH (type);
431 offset += SCORE_REGSIZE, regnum++)
433 int xfer = SCORE_REGSIZE;
434 if (offset + xfer > TYPE_LENGTH (type))
435 xfer = TYPE_LENGTH (type) - offset;
436 score_xfer_register (regcache, regnum, xfer,
437 gdbarch_byte_order (gdbarch),
438 readbuf, writebuf, offset);
440 return RETURN_VALUE_REGISTER_CONVENTION;
444 static struct frame_id
445 score_unwind_dummy_id (struct gdbarch *gdbarch,
446 struct frame_info *next_frame)
448 return frame_id_build (
449 frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM),
450 frame_pc_unwind (next_frame));
454 score_type_needs_double_align (struct type *type)
456 enum type_code typecode = TYPE_CODE (type);
458 if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
459 || (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
461 else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
465 n = TYPE_NFIELDS (type);
466 for (i = 0; i < n; i++)
467 if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i)))
475 score_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
476 struct regcache *regcache, CORE_ADDR bp_addr,
477 int nargs, struct value **args, CORE_ADDR sp,
478 int struct_return, CORE_ADDR struct_addr)
483 CORE_ADDR stack_offset = 0;
486 /* Step 1, Save RA. */
487 regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
489 /* Step 2, Make space on the stack for the args. */
490 struct_addr = align_down (struct_addr, 16);
491 sp = align_down (sp, 16);
492 for (argnum = 0; argnum < nargs; argnum++)
493 arglen += align_up (TYPE_LENGTH (value_type (args[argnum])),
495 sp -= align_up (arglen, 16);
497 argreg = SCORE_BEGIN_ARG_REGNUM;
499 /* Step 3, Check if struct return then save the struct address to
500 r4 and increase the stack_offset by 4. */
503 regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
504 stack_offset += SCORE_REGSIZE;
507 /* Step 4, Load arguments:
508 If arg length is too long (> 4 bytes), then split the arg and
510 for (argnum = 0; argnum < nargs; argnum++)
512 struct value *arg = args[argnum];
513 struct type *arg_type = check_typedef (value_type (arg));
514 enum type_code typecode = TYPE_CODE (arg_type);
515 const gdb_byte *val = value_contents (arg);
516 int downward_offset = 0;
517 int odd_sized_struct_p;
518 int arg_last_part_p = 0;
520 arglen = TYPE_LENGTH (arg_type);
521 odd_sized_struct_p = (arglen > SCORE_REGSIZE
522 && arglen % SCORE_REGSIZE != 0);
524 /* If a arg should be aligned to 8 bytes (long long or double),
525 the value should be put to even register numbers. */
526 if (score_type_needs_double_align (arg_type))
532 /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
533 the default "downward"/"upward" method:
539 char a; char b; char c;
540 } s = {'a', 'b', 'c'};
542 Big endian: s = {X, 'a', 'b', 'c'}
543 Little endian: s = {'a', 'b', 'c', X}
545 Where X is a hole. */
547 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG
548 && (typecode == TYPE_CODE_STRUCT
549 || typecode == TYPE_CODE_UNION)
550 && argreg > SCORE_LAST_ARG_REGNUM
551 && arglen < SCORE_REGSIZE)
552 downward_offset += (SCORE_REGSIZE - arglen);
556 int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
557 ULONGEST regval = extract_unsigned_integer (val, partial_len);
559 /* The last part of a arg should shift left when
560 gdbarch_byte_order is BFD_ENDIAN_BIG. */
561 if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG
562 && arg_last_part_p == 1
563 && (typecode == TYPE_CODE_STRUCT
564 || typecode == TYPE_CODE_UNION))
565 regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT);
567 /* Always increase the stack_offset and save args to stack. */
568 addr = sp + stack_offset + downward_offset;
569 write_memory (addr, val, partial_len);
571 if (argreg <= SCORE_LAST_ARG_REGNUM)
573 regcache_cooked_write_unsigned (regcache, argreg++, regval);
574 if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
579 arglen -= partial_len;
580 stack_offset += align_up (partial_len, SCORE_REGSIZE);
584 /* Step 5, Save SP. */
585 regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
591 score_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
594 char *memblock = NULL;
598 error ("Error: malloc size < 0 in file:%s, line:%d!",
605 memblock = (char *) xmalloc (size);
606 memset (memblock, 0, size);
607 ret = target_read_memory (addr & ~0x3, memblock, size);
610 error ("Error: target_read_memory in file:%s, line:%d!",
618 score_free_memblock (char *memblock)
624 score_adjust_memblock_ptr (char **memblock, CORE_ADDR prev_pc,
629 /* First time call this function, do nothing. */
631 else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0)
633 /* First 16-bit instruction, then 32-bit instruction. */
634 *memblock += SCORE_INSTLEN;
636 else if (cur_pc - prev_pc == 4)
638 /* Is 32-bit instruction, increase MEMBLOCK by 4. */
639 *memblock += SCORE_INSTLEN;
644 score_fetch_inst (struct gdbarch *gdbarch, CORE_ADDR addr, char *memblock)
646 static inst_t inst = { 0, 0 };
647 char buf[SCORE_INSTLEN] = { 0 };
651 if (target_has_execution && memblock != NULL)
653 /* Fetch instruction from local MEMBLOCK. */
654 memcpy (buf, memblock, SCORE_INSTLEN);
658 /* Fetch instruction from target. */
659 ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
662 error ("Error: target_read_memory in file:%s, line:%d!",
668 inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN);
669 inst.is15 = !(inst.raw & 0x80008000);
670 inst.v = RM_PBITS (inst.raw);
671 big = (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG);
674 if (big ^ ((addr & 0x2) == 2))
675 inst.v = G_FLD (inst.v, 29, 15);
677 inst.v = G_FLD (inst.v, 14, 0);
683 score_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
686 int iscan = 32, stack_sub = 0;
689 inst_t *inst = score_fetch_inst (gdbarch, cpc, NULL);
692 if (!inst->is15 && !stack_sub
693 && (G_FLD (inst->v, 29, 25) == 0x1
694 && G_FLD (inst->v, 24, 20) == 0x0))
696 /* addi r0, offset */
697 pc = stack_sub = cpc + SCORE_INSTLEN;
700 && inst->v == RM_PBITS (0x8040bc56))
703 pc = cpc + SCORE_INSTLEN;
707 && inst->v == RM_PBITS (0x0203))
710 pc = cpc + SCORE16_INSTLEN;
714 && ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */
715 || (G_FLD (inst->v, 14, 12) == 4) /* b15 form */
716 || (G_FLD (inst->v, 14, 12) == 0x0
717 && G_FLD (inst->v, 3, 0) == 0x4))) /* br! */
720 && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
721 || (G_FLD (inst->v, 29, 25) == 4) /* b32 form */
722 || (G_FLD (inst->v, 29, 25) == 0x0
723 && G_FLD (inst->v, 6, 1) == 0x4))) /* br */
726 cpc += inst->is15 ? SCORE16_INSTLEN : SCORE_INSTLEN;
732 score_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
734 inst_t *inst = score_fetch_inst (gdbarch, cur_pc, NULL);
737 return 1; /* mv! r0, r2 */
738 else if (G_FLD (inst->v, 14, 12) == 0x2
739 && G_FLD (inst->v, 3, 0) == 0xa)
741 else if (G_FLD (inst->v, 14, 12) == 0x0
742 && G_FLD (inst->v, 7, 0) == 0x34)
743 return 1; /* br! r3 */
744 else if (G_FLD (inst->v, 29, 15) == 0x2
745 && G_FLD (inst->v, 6, 1) == 0x2b)
746 return 1; /* mv r0, r2 */
747 else if (G_FLD (inst->v, 29, 25) == 0x0
748 && G_FLD (inst->v, 6, 1) == 0x4
749 && G_FLD (inst->v, 19, 15) == 0x3)
750 return 1; /* br r3 */
756 score_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
757 struct frame_info *next_frame,
758 struct score_frame_cache *this_cache)
760 struct gdbarch *gdbarch = get_frame_arch (next_frame);
763 CORE_ADDR cur_pc = startaddr;
772 char *memblock = NULL;
773 char *memblock_ptr = NULL;
774 CORE_ADDR prev_pc = -1;
776 /* Allocate MEMBLOCK if PC - STARTADDR > 0. */
777 memblock_ptr = memblock =
778 score_malloc_and_get_memblock (startaddr, pc - startaddr);
780 sp = frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
781 fp = frame_unwind_register_unsigned (next_frame, SCORE_FP_REGNUM);
783 for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
786 if (memblock != NULL)
788 /* Reading memory block from target succefully and got all
789 the instructions(from STARTADDR to PC) needed. */
790 score_adjust_memblock_ptr (&memblock, prev_pc, cur_pc);
791 inst = score_fetch_inst (gdbarch, cur_pc, memblock);
795 /* Otherwise, we fetch 4 bytes from target, and GDB also
797 inst = score_fetch_inst (gdbarch, cur_pc, NULL);
802 inst_len = SCORE16_INSTLEN;
804 if (G_FLD (inst->v, 14, 12) == 0x2
805 && G_FLD (inst->v, 3, 0) == 0xe)
810 if (G_FLD (inst->v, 11, 7) == 0x6
814 ra_offset = sp_offset;
817 else if (G_FLD (inst->v, 11, 7) == 0x4
821 fp_offset = sp_offset;
825 else if (G_FLD (inst->v, 14, 12) == 0x2
826 && G_FLD (inst->v, 3, 0) == 0xa)
831 else if (G_FLD (inst->v, 14, 7) == 0xc1
832 && G_FLD (inst->v, 2, 0) == 0x0)
835 sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3));
837 else if (G_FLD (inst->v, 14, 7) == 0xc0
838 && G_FLD (inst->v, 2, 0) == 0x0)
841 sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3));
846 inst_len = SCORE_INSTLEN;
848 if (G_FLD (inst->v, 29, 15) == 0xc60
849 && G_FLD (inst->v, 2, 0) == 0x4)
851 /* sw r3, [r0, offset]+ */
852 sp_offset += SCORE_INSTLEN;
853 if (ra_offset_p == 0)
855 ra_offset = sp_offset;
859 if (G_FLD (inst->v, 29, 15) == 0xc40
860 && G_FLD (inst->v, 2, 0) == 0x4)
862 /* sw r2, [r0, offset]+ */
863 sp_offset += SCORE_INSTLEN;
864 if (fp_offset_p == 0)
866 fp_offset = sp_offset;
870 else if (G_FLD (inst->v, 29, 15) == 0x1c60
871 && G_FLD (inst->v, 2, 0) == 0x0)
873 /* lw r3, [r0]+, 4 */
874 sp_offset -= SCORE_INSTLEN;
877 else if (G_FLD (inst->v, 29, 15) == 0x1c40
878 && G_FLD (inst->v, 2, 0) == 0x0)
880 /* lw r2, [r0]+, 4 */
881 sp_offset -= SCORE_INSTLEN;
885 else if (G_FLD (inst->v, 29, 17) == 0x100
886 && G_FLD (inst->v, 0, 0) == 0x0)
888 /* addi r0, -offset */
889 sp_offset += 65536 - G_FLD (inst->v, 16, 1);
891 else if (G_FLD (inst->v, 29, 17) == 0x110
892 && G_FLD (inst->v, 0, 0) == 0x0)
894 /* addi r2, offset */
897 unsigned int save_v = inst->v;
899 score_fetch_inst (gdbarch, cur_pc + SCORE_INSTLEN, NULL);
900 if (inst2->v == 0x23)
903 sp_offset -= G_FLD (save_v, 16, 1);
911 if (ra_offset_p == 1)
913 if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
914 this_cache->saved_regs[SCORE_PC_REGNUM].addr =
915 sp + sp_offset - ra_offset;
919 this_cache->saved_regs[SCORE_PC_REGNUM] =
920 this_cache->saved_regs[SCORE_RA_REGNUM];
924 if (fp_offset_p == 1)
926 if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
927 this_cache->saved_regs[SCORE_FP_REGNUM].addr =
928 sp + sp_offset - fp_offset;
931 /* Save SP and FP. */
932 this_cache->base = sp + sp_offset;
935 /* Don't forget to free MEMBLOCK if we allocated it. */
936 if (memblock_ptr != NULL)
937 score_free_memblock (memblock_ptr);
940 static struct score_frame_cache *
941 score_make_prologue_cache (struct frame_info *next_frame, void **this_cache)
943 struct score_frame_cache *cache;
945 if ((*this_cache) != NULL)
946 return (*this_cache);
948 cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
949 (*this_cache) = cache;
950 cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
952 /* Analyze the prologue. */
954 const CORE_ADDR pc = frame_pc_unwind (next_frame);
955 CORE_ADDR start_addr;
957 find_pc_partial_function (pc, NULL, &start_addr, NULL);
960 score_analyze_prologue (start_addr, pc, next_frame, *this_cache);
964 trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
966 return (*this_cache);
970 score_prologue_this_id (struct frame_info *next_frame, void **this_cache,
971 struct frame_id *this_id)
973 struct score_frame_cache *info = score_make_prologue_cache (next_frame,
975 (*this_id) = frame_id_build (info->base,
976 frame_func_unwind (next_frame, NORMAL_FRAME));
980 score_prologue_prev_register (struct frame_info *next_frame,
982 int regnum, int *optimizedp,
983 enum lval_type *lvalp, CORE_ADDR * addrp,
984 int *realnump, gdb_byte * valuep)
986 struct score_frame_cache *info = score_make_prologue_cache (next_frame,
988 trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
989 optimizedp, lvalp, addrp, realnump, valuep);
992 static const struct frame_unwind score_prologue_unwind =
995 score_prologue_this_id,
996 score_prologue_prev_register
999 static const struct frame_unwind *
1000 score_prologue_sniffer (struct frame_info *next_frame)
1002 return &score_prologue_unwind;
1006 score_prologue_frame_base_address (struct frame_info *next_frame,
1009 struct score_frame_cache *info =
1010 score_make_prologue_cache (next_frame, this_cache);
1014 static const struct frame_base score_prologue_frame_base =
1016 &score_prologue_unwind,
1017 score_prologue_frame_base_address,
1018 score_prologue_frame_base_address,
1019 score_prologue_frame_base_address,
1022 static const struct frame_base *
1023 score_prologue_frame_base_sniffer (struct frame_info *next_frame)
1025 return &score_prologue_frame_base;
1028 static struct gdbarch *
1029 score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1031 struct gdbarch *gdbarch;
1033 arches = gdbarch_list_lookup_by_info (arches, &info);
1036 return (arches->gdbarch);
1038 gdbarch = gdbarch_alloc (&info, 0);
1040 set_gdbarch_short_bit (gdbarch, 16);
1041 set_gdbarch_int_bit (gdbarch, 32);
1042 set_gdbarch_float_bit (gdbarch, 32);
1043 set_gdbarch_double_bit (gdbarch, 64);
1044 set_gdbarch_long_double_bit (gdbarch, 64);
1045 set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
1046 set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
1047 set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
1048 set_gdbarch_num_regs (gdbarch, SCORE_NUM_REGS);
1049 set_gdbarch_register_name (gdbarch, score_register_name);
1050 set_gdbarch_breakpoint_from_pc (gdbarch, score_breakpoint_from_pc);
1051 set_gdbarch_register_type (gdbarch, score_register_type);
1052 set_gdbarch_frame_align (gdbarch, score_frame_align);
1053 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1054 set_gdbarch_unwind_pc (gdbarch, score_unwind_pc);
1055 set_gdbarch_unwind_sp (gdbarch, score_unwind_sp);
1056 set_gdbarch_print_insn (gdbarch, score_print_insn);
1057 set_gdbarch_skip_prologue (gdbarch, score_skip_prologue);
1058 set_gdbarch_in_function_epilogue_p (gdbarch, score_in_function_epilogue_p);
1060 /* Watchpoint hooks. */
1061 set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
1063 /* Dummy frame hooks. */
1064 set_gdbarch_return_value (gdbarch, score_return_value);
1065 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1066 set_gdbarch_unwind_dummy_id (gdbarch, score_unwind_dummy_id);
1067 set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
1069 /* Normal frame hooks. */
1070 frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
1071 frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
1072 frame_unwind_append_sniffer (gdbarch, score_prologue_sniffer);
1073 frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
1078 extern initialize_file_ftype _initialize_score_tdep;
1081 _initialize_score_tdep (void)
1083 gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);