1 /* Target-dependent code for the S+core architecture, for GDB,
4 Copyright (C) 2006, 2007 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 (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 (int regnum)
310 gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
315 score_print_insn (bfd_vma memaddr, struct disassemble_info *info)
317 if (gdbarch_byte_order (current_gdbarch) == 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 (CORE_ADDR *pcptr, int *lenptr)
326 gdb_byte buf[SCORE_INSTLEN] = { 0 };
330 if ((ret = target_read_memory (*pcptr & ~0x3, buf, SCORE_INSTLEN)) != 0)
332 error ("Error: target_read_memory in file:%s, line:%d!",
335 raw = extract_unsigned_integer (buf, SCORE_INSTLEN);
337 if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG)
339 if (!(raw & 0x80008000))
341 /* 16bits instruction. */
342 static gdb_byte big_breakpoint16[] = { 0x60, 0x02 };
344 *lenptr = sizeof (big_breakpoint16);
345 return big_breakpoint16;
349 /* 32bits instruction. */
350 static gdb_byte big_breakpoint32[] = { 0x80, 0x00, 0x80, 0x06 };
352 *lenptr = sizeof (big_breakpoint32);
353 return big_breakpoint32;
358 if (!(raw & 0x80008000))
360 /* 16bits instruction. */
361 static gdb_byte little_breakpoint16[] = { 0x02, 0x60 };
363 *lenptr = sizeof (little_breakpoint16);
364 return little_breakpoint16;
368 /* 32bits instruction. */
369 static gdb_byte little_breakpoint32[] = { 0x06, 0x80, 0x00, 0x80 };
371 *lenptr = sizeof (little_breakpoint32);
372 return little_breakpoint32;
378 score_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
380 return align_down (addr, 16);
384 score_xfer_register (struct regcache *regcache, int regnum, int length,
385 enum bfd_endian endian, gdb_byte *readbuf,
386 const gdb_byte *writebuf, int buf_offset)
389 gdb_assert (regnum >= 0 && regnum < SCORE_NUM_REGS);
394 reg_offset = SCORE_REGSIZE - length;
396 case BFD_ENDIAN_LITTLE:
399 case BFD_ENDIAN_UNKNOWN:
403 error ("Error: score_xfer_register in file:%s, line:%d!",
408 regcache_cooked_read_part (regcache, regnum, reg_offset, length,
409 readbuf + buf_offset);
410 if (writebuf != NULL)
411 regcache_cooked_write_part (regcache, regnum, reg_offset, length,
412 writebuf + buf_offset);
415 static enum return_value_convention
416 score_return_value (struct gdbarch *gdbarch, struct type *type,
417 struct regcache *regcache,
418 gdb_byte * readbuf, const gdb_byte * writebuf)
420 if (TYPE_CODE (type) == TYPE_CODE_STRUCT
421 || TYPE_CODE (type) == TYPE_CODE_UNION
422 || TYPE_CODE (type) == TYPE_CODE_ARRAY)
423 return RETURN_VALUE_STRUCT_CONVENTION;
428 for (offset = 0, regnum = SCORE_A0_REGNUM;
429 offset < TYPE_LENGTH (type);
430 offset += SCORE_REGSIZE, regnum++)
432 int xfer = SCORE_REGSIZE;
433 if (offset + xfer > TYPE_LENGTH (type))
434 xfer = TYPE_LENGTH (type) - offset;
435 score_xfer_register (regcache, regnum, xfer,
436 gdbarch_byte_order (current_gdbarch),
437 readbuf, writebuf, offset);
439 return RETURN_VALUE_REGISTER_CONVENTION;
443 static struct frame_id
444 score_unwind_dummy_id (struct gdbarch *gdbarch,
445 struct frame_info *next_frame)
447 return frame_id_build (
448 frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM),
449 frame_pc_unwind (next_frame));
453 score_type_needs_double_align (struct type *type)
455 enum type_code typecode = TYPE_CODE (type);
457 if ((typecode == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
458 || (typecode == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
460 else if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)
464 n = TYPE_NFIELDS (type);
465 for (i = 0; i < n; i++)
466 if (score_type_needs_double_align (TYPE_FIELD_TYPE (type, i)))
474 score_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
475 struct regcache *regcache, CORE_ADDR bp_addr,
476 int nargs, struct value **args, CORE_ADDR sp,
477 int struct_return, CORE_ADDR struct_addr)
482 CORE_ADDR stack_offset = 0;
485 /* Step 1, Save RA. */
486 regcache_cooked_write_unsigned (regcache, SCORE_RA_REGNUM, bp_addr);
488 /* Step 2, Make space on the stack for the args. */
489 struct_addr = align_down (struct_addr, 16);
490 sp = align_down (sp, 16);
491 for (argnum = 0; argnum < nargs; argnum++)
492 arglen += align_up (TYPE_LENGTH (value_type (args[argnum])),
494 sp -= align_up (arglen, 16);
496 argreg = SCORE_BEGIN_ARG_REGNUM;
498 /* Step 3, Check if struct return then save the struct address to
499 r4 and increase the stack_offset by 4. */
502 regcache_cooked_write_unsigned (regcache, argreg++, struct_addr);
503 stack_offset += SCORE_REGSIZE;
506 /* Step 4, Load arguments:
507 If arg length is too long (> 4 bytes), then split the arg and
509 for (argnum = 0; argnum < nargs; argnum++)
511 struct value *arg = args[argnum];
512 struct type *arg_type = check_typedef (value_type (arg));
513 enum type_code typecode = TYPE_CODE (arg_type);
514 const gdb_byte *val = value_contents (arg);
515 int downward_offset = 0;
516 int odd_sized_struct_p;
517 int arg_last_part_p = 0;
519 arglen = TYPE_LENGTH (arg_type);
520 odd_sized_struct_p = (arglen > SCORE_REGSIZE
521 && arglen % SCORE_REGSIZE != 0);
523 /* If a arg should be aligned to 8 bytes (long long or double),
524 the value should be put to even register numbers. */
525 if (score_type_needs_double_align (arg_type))
531 /* If sizeof a block < SCORE_REGSIZE, then Score GCC will chose
532 the default "downward"/"upward" method:
538 char a; char b; char c;
539 } s = {'a', 'b', 'c'};
541 Big endian: s = {X, 'a', 'b', 'c'}
542 Little endian: s = {'a', 'b', 'c', X}
544 Where X is a hole. */
546 if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG
547 && (typecode == TYPE_CODE_STRUCT
548 || typecode == TYPE_CODE_UNION)
549 && argreg > SCORE_LAST_ARG_REGNUM
550 && arglen < SCORE_REGSIZE)
551 downward_offset += (SCORE_REGSIZE - arglen);
555 int partial_len = arglen < SCORE_REGSIZE ? arglen : SCORE_REGSIZE;
556 ULONGEST regval = extract_unsigned_integer (val, partial_len);
558 /* The last part of a arg should shift left when
559 gdbarch_byte_order is BFD_ENDIAN_BIG. */
560 if (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG
561 && arg_last_part_p == 1
562 && (typecode == TYPE_CODE_STRUCT
563 || typecode == TYPE_CODE_UNION))
564 regval <<= ((SCORE_REGSIZE - partial_len) * TARGET_CHAR_BIT);
566 /* Always increase the stack_offset and save args to stack. */
567 addr = sp + stack_offset + downward_offset;
568 write_memory (addr, val, partial_len);
570 if (argreg <= SCORE_LAST_ARG_REGNUM)
572 regcache_cooked_write_unsigned (regcache, argreg++, regval);
573 if (arglen > SCORE_REGSIZE && arglen < SCORE_REGSIZE * 2)
578 arglen -= partial_len;
579 stack_offset += align_up (partial_len, SCORE_REGSIZE);
583 /* Step 5, Save SP. */
584 regcache_cooked_write_unsigned (regcache, SCORE_SP_REGNUM, sp);
590 score_malloc_and_get_memblock (CORE_ADDR addr, CORE_ADDR size)
593 char *memblock = NULL;
597 error ("Error: malloc size < 0 in file:%s, line:%d!",
604 memblock = (char *) xmalloc (size);
605 memset (memblock, 0, size);
606 ret = target_read_memory (addr & ~0x3, memblock, size);
609 error ("Error: target_read_memory in file:%s, line:%d!",
617 score_free_memblock (char *memblock)
623 score_adjust_memblock_ptr (char **memblock, CORE_ADDR prev_pc,
628 /* First time call this function, do nothing. */
630 else if (cur_pc - prev_pc == 2 && (cur_pc & 0x3) == 0)
632 /* First 16-bit instruction, then 32-bit instruction. */
633 *memblock += SCORE_INSTLEN;
635 else if (cur_pc - prev_pc == 4)
637 /* Is 32-bit instruction, increase MEMBLOCK by 4. */
638 *memblock += SCORE_INSTLEN;
643 score_fetch_inst (CORE_ADDR addr, char *memblock)
645 static inst_t inst = { 0, 0 };
646 char buf[SCORE_INSTLEN] = { 0 };
650 if (target_has_execution && memblock != NULL)
652 /* Fetch instruction from local MEMBLOCK. */
653 memcpy (buf, memblock, SCORE_INSTLEN);
657 /* Fetch instruction from target. */
658 ret = target_read_memory (addr & ~0x3, buf, SCORE_INSTLEN);
661 error ("Error: target_read_memory in file:%s, line:%d!",
667 inst.raw = extract_unsigned_integer (buf, SCORE_INSTLEN);
668 inst.is15 = !(inst.raw & 0x80008000);
669 inst.v = RM_PBITS (inst.raw);
670 big = (gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG);
673 if (big ^ ((addr & 0x2) == 2))
674 inst.v = G_FLD (inst.v, 29, 15);
676 inst.v = G_FLD (inst.v, 14, 0);
682 score_skip_prologue (CORE_ADDR pc)
685 int iscan = 32, stack_sub = 0;
688 inst_t *inst = score_fetch_inst (cpc, NULL);
691 if (!inst->is15 && !stack_sub
692 && (G_FLD (inst->v, 29, 25) == 0x1
693 && G_FLD (inst->v, 24, 20) == 0x0))
695 /* addi r0, offset */
696 pc = stack_sub = cpc + SCORE_INSTLEN;
699 && inst->v == RM_PBITS (0x8040bc56))
702 pc = cpc + SCORE_INSTLEN;
706 && inst->v == RM_PBITS (0x0203))
709 pc = cpc + SCORE16_INSTLEN;
713 && ((G_FLD (inst->v, 14, 12) == 3) /* j15 form */
714 || (G_FLD (inst->v, 14, 12) == 4) /* b15 form */
715 || (G_FLD (inst->v, 14, 12) == 0x0
716 && G_FLD (inst->v, 3, 0) == 0x4))) /* br! */
719 && ((G_FLD (inst->v, 29, 25) == 2) /* j32 form */
720 || (G_FLD (inst->v, 29, 25) == 4) /* b32 form */
721 || (G_FLD (inst->v, 29, 25) == 0x0
722 && G_FLD (inst->v, 6, 1) == 0x4))) /* br */
725 cpc += inst->is15 ? SCORE16_INSTLEN : SCORE_INSTLEN;
731 score_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR cur_pc)
733 inst_t *inst = score_fetch_inst (cur_pc, NULL);
736 return 1; /* mv! r0, r2 */
737 else if (G_FLD (inst->v, 14, 12) == 0x2
738 && G_FLD (inst->v, 3, 0) == 0xa)
740 else if (G_FLD (inst->v, 14, 12) == 0x0
741 && G_FLD (inst->v, 7, 0) == 0x34)
742 return 1; /* br! r3 */
743 else if (G_FLD (inst->v, 29, 15) == 0x2
744 && G_FLD (inst->v, 6, 1) == 0x2b)
745 return 1; /* mv r0, r2 */
746 else if (G_FLD (inst->v, 29, 25) == 0x0
747 && G_FLD (inst->v, 6, 1) == 0x4
748 && G_FLD (inst->v, 19, 15) == 0x3)
749 return 1; /* br r3 */
755 score_analyze_prologue (CORE_ADDR startaddr, CORE_ADDR pc,
756 struct frame_info *next_frame,
757 struct score_frame_cache *this_cache)
761 CORE_ADDR cur_pc = startaddr;
770 char *memblock = NULL;
771 char *memblock_ptr = NULL;
772 CORE_ADDR prev_pc = -1;
774 /* Allocate MEMBLOCK if PC - STARTADDR > 0. */
775 memblock_ptr = memblock =
776 score_malloc_and_get_memblock (startaddr, pc - startaddr);
778 sp = frame_unwind_register_unsigned (next_frame, SCORE_SP_REGNUM);
779 fp = frame_unwind_register_unsigned (next_frame, SCORE_FP_REGNUM);
781 for (; cur_pc < pc; prev_pc = cur_pc, cur_pc += inst_len)
784 if (memblock != NULL)
786 /* Reading memory block from target succefully and got all
787 the instructions(from STARTADDR to PC) needed. */
788 score_adjust_memblock_ptr (&memblock, prev_pc, cur_pc);
789 inst = score_fetch_inst (cur_pc, memblock);
793 /* Otherwise, we fetch 4 bytes from target, and GDB also
795 inst = score_fetch_inst (cur_pc, NULL);
800 inst_len = SCORE16_INSTLEN;
802 if (G_FLD (inst->v, 14, 12) == 0x2
803 && G_FLD (inst->v, 3, 0) == 0xe)
808 if (G_FLD (inst->v, 11, 7) == 0x6
812 ra_offset = sp_offset;
815 else if (G_FLD (inst->v, 11, 7) == 0x4
819 fp_offset = sp_offset;
823 else if (G_FLD (inst->v, 14, 12) == 0x2
824 && G_FLD (inst->v, 3, 0) == 0xa)
829 else if (G_FLD (inst->v, 14, 7) == 0xc1
830 && G_FLD (inst->v, 2, 0) == 0x0)
833 sp_offset += (int) pow (2, G_FLD (inst->v, 6, 3));
835 else if (G_FLD (inst->v, 14, 7) == 0xc0
836 && G_FLD (inst->v, 2, 0) == 0x0)
839 sp_offset -= (int) pow (2, G_FLD (inst->v, 6, 3));
844 inst_len = SCORE_INSTLEN;
846 if (G_FLD (inst->v, 29, 15) == 0xc60
847 && G_FLD (inst->v, 2, 0) == 0x4)
849 /* sw r3, [r0, offset]+ */
850 sp_offset += SCORE_INSTLEN;
851 if (ra_offset_p == 0)
853 ra_offset = sp_offset;
857 if (G_FLD (inst->v, 29, 15) == 0xc40
858 && G_FLD (inst->v, 2, 0) == 0x4)
860 /* sw r2, [r0, offset]+ */
861 sp_offset += SCORE_INSTLEN;
862 if (fp_offset_p == 0)
864 fp_offset = sp_offset;
868 else if (G_FLD (inst->v, 29, 15) == 0x1c60
869 && G_FLD (inst->v, 2, 0) == 0x0)
871 /* lw r3, [r0]+, 4 */
872 sp_offset -= SCORE_INSTLEN;
875 else if (G_FLD (inst->v, 29, 15) == 0x1c40
876 && G_FLD (inst->v, 2, 0) == 0x0)
878 /* lw r2, [r0]+, 4 */
879 sp_offset -= SCORE_INSTLEN;
883 else if (G_FLD (inst->v, 29, 17) == 0x100
884 && G_FLD (inst->v, 0, 0) == 0x0)
886 /* addi r0, -offset */
887 sp_offset += 65536 - G_FLD (inst->v, 16, 1);
889 else if (G_FLD (inst->v, 29, 17) == 0x110
890 && G_FLD (inst->v, 0, 0) == 0x0)
892 /* addi r2, offset */
895 unsigned int save_v = inst->v;
897 score_fetch_inst (cur_pc + SCORE_INSTLEN, NULL);
898 if (inst2->v == 0x23)
901 sp_offset -= G_FLD (save_v, 16, 1);
909 if (ra_offset_p == 1)
911 if (this_cache->saved_regs[SCORE_PC_REGNUM].addr == -1)
912 this_cache->saved_regs[SCORE_PC_REGNUM].addr =
913 sp + sp_offset - ra_offset;
917 this_cache->saved_regs[SCORE_PC_REGNUM] =
918 this_cache->saved_regs[SCORE_RA_REGNUM];
922 if (fp_offset_p == 1)
924 if (this_cache->saved_regs[SCORE_FP_REGNUM].addr == -1)
925 this_cache->saved_regs[SCORE_FP_REGNUM].addr =
926 sp + sp_offset - fp_offset;
929 /* Save SP and FP. */
930 this_cache->base = sp + sp_offset;
933 /* Don't forget to free MEMBLOCK if we allocated it. */
934 if (memblock_ptr != NULL)
935 score_free_memblock (memblock_ptr);
938 static struct score_frame_cache *
939 score_make_prologue_cache (struct frame_info *next_frame, void **this_cache)
941 struct score_frame_cache *cache;
943 if ((*this_cache) != NULL)
944 return (*this_cache);
946 cache = FRAME_OBSTACK_ZALLOC (struct score_frame_cache);
947 (*this_cache) = cache;
948 cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
950 /* Analyze the prologue. */
952 const CORE_ADDR pc = frame_pc_unwind (next_frame);
953 CORE_ADDR start_addr;
955 find_pc_partial_function (pc, NULL, &start_addr, NULL);
958 score_analyze_prologue (start_addr, pc, next_frame, *this_cache);
962 trad_frame_set_value (cache->saved_regs, SCORE_SP_REGNUM, cache->base);
964 return (*this_cache);
968 score_prologue_this_id (struct frame_info *next_frame, void **this_cache,
969 struct frame_id *this_id)
971 struct score_frame_cache *info = score_make_prologue_cache (next_frame,
973 (*this_id) = frame_id_build (info->base,
974 frame_func_unwind (next_frame, NORMAL_FRAME));
978 score_prologue_prev_register (struct frame_info *next_frame,
980 int regnum, int *optimizedp,
981 enum lval_type *lvalp, CORE_ADDR * addrp,
982 int *realnump, gdb_byte * valuep)
984 struct score_frame_cache *info = score_make_prologue_cache (next_frame,
986 trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
987 optimizedp, lvalp, addrp, realnump, valuep);
990 static const struct frame_unwind score_prologue_unwind =
993 score_prologue_this_id,
994 score_prologue_prev_register
997 static const struct frame_unwind *
998 score_prologue_sniffer (struct frame_info *next_frame)
1000 return &score_prologue_unwind;
1004 score_prologue_frame_base_address (struct frame_info *next_frame,
1007 struct score_frame_cache *info =
1008 score_make_prologue_cache (next_frame, this_cache);
1012 static const struct frame_base score_prologue_frame_base =
1014 &score_prologue_unwind,
1015 score_prologue_frame_base_address,
1016 score_prologue_frame_base_address,
1017 score_prologue_frame_base_address,
1020 static const struct frame_base *
1021 score_prologue_frame_base_sniffer (struct frame_info *next_frame)
1023 return &score_prologue_frame_base;
1026 static struct gdbarch *
1027 score_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
1029 struct gdbarch *gdbarch;
1031 arches = gdbarch_list_lookup_by_info (arches, &info);
1034 return (arches->gdbarch);
1036 gdbarch = gdbarch_alloc (&info, 0);
1038 set_gdbarch_short_bit (gdbarch, 16);
1039 set_gdbarch_int_bit (gdbarch, 32);
1040 set_gdbarch_float_bit (gdbarch, 32);
1041 set_gdbarch_double_bit (gdbarch, 64);
1042 set_gdbarch_long_double_bit (gdbarch, 64);
1043 set_gdbarch_register_sim_regno (gdbarch, score_register_sim_regno);
1044 set_gdbarch_pc_regnum (gdbarch, SCORE_PC_REGNUM);
1045 set_gdbarch_sp_regnum (gdbarch, SCORE_SP_REGNUM);
1046 set_gdbarch_num_regs (gdbarch, SCORE_NUM_REGS);
1047 set_gdbarch_register_name (gdbarch, score_register_name);
1048 set_gdbarch_breakpoint_from_pc (gdbarch, score_breakpoint_from_pc);
1049 set_gdbarch_register_type (gdbarch, score_register_type);
1050 set_gdbarch_frame_align (gdbarch, score_frame_align);
1051 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
1052 set_gdbarch_unwind_pc (gdbarch, score_unwind_pc);
1053 set_gdbarch_unwind_sp (gdbarch, score_unwind_sp);
1054 set_gdbarch_print_insn (gdbarch, score_print_insn);
1055 set_gdbarch_skip_prologue (gdbarch, score_skip_prologue);
1056 set_gdbarch_in_function_epilogue_p (gdbarch, score_in_function_epilogue_p);
1058 /* Watchpoint hooks. */
1059 set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
1061 /* Dummy frame hooks. */
1062 set_gdbarch_return_value (gdbarch, score_return_value);
1063 set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
1064 set_gdbarch_unwind_dummy_id (gdbarch, score_unwind_dummy_id);
1065 set_gdbarch_push_dummy_call (gdbarch, score_push_dummy_call);
1067 /* Normal frame hooks. */
1068 frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
1069 frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
1070 frame_unwind_append_sniffer (gdbarch, score_prologue_sniffer);
1071 frame_base_append_sniffer (gdbarch, score_prologue_frame_base_sniffer);
1076 extern initialize_file_ftype _initialize_score_tdep;
1079 _initialize_score_tdep (void)
1081 gdbarch_register (bfd_arch_score, score_gdbarch_init, NULL);