1 /* Target-dependent code for Mitsubishi D30V, for GDB.
2 Copyright (C) 1996, 1997 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* Contributed by Martin Hunt, hunt@cygnus.com */
29 #include "gdb_string.h"
36 void d30v_frame_find_saved_regs PARAMS ((struct frame_info *fi,
37 struct frame_saved_regs *fsr));
38 static void d30v_pop_dummy_frame PARAMS ((struct frame_info *fi));
39 static void d30v_print_flags PARAMS ((void));
40 static void print_flags_command PARAMS ((char *, int));
42 /* the following defines assume:
43 fp is r61, lr is r62, sp is r63, and ?? is r22
44 if that changes, they will need to be updated */
46 #define OP_MASK_ALL_BUT_RA 0x0ffc0fff /* throw away Ra, keep the rest */
48 #define OP_STW_SPM 0x054c0fc0 /* stw Ra, @(sp-) */
49 #define OP_STW_SP_R0 0x05400fc0 /* stw Ra, @(sp,r0) */
50 #define OP_STW_SP_IMM0 0x05480fc0 /* st Ra, @(sp, 0x0) */
51 #define OP_STW_R22P_R0 0x05440580 /* stw Ra, @(r22+,r0) */
53 #define OP_ST2W_SPM 0x056c0fc0 /* st2w Ra, @(sp-) */
54 #define OP_ST2W_SP_R0 0x05600fc0 /* st2w Ra, @(sp, r0) */
55 #define OP_ST2W_SP_IMM0 0x05680fc0 /* st2w Ra, @(sp, 0x0) */
56 #define OP_ST2W_R22P_R0 0x05640580 /* st2w Ra, @(r22+, r0) */
58 #define OP_MASK_OPCODE 0x0ffc0000 /* just the opcode, ign operands */
59 #define OP_NOP 0x00f00000 /* nop */
61 #define OP_MASK_ALL_BUT_IMM 0x0fffffc0 /* throw away imm, keep the rest */
62 #define OP_SUB_SP_IMM 0x082bffc0 /* sub sp,sp,imm */
63 #define OP_ADD_SP_IMM 0x080bffc0 /* add sp,sp,imm */
64 #define OP_ADD_R22_SP_IMM 0x08096fc0 /* add r22,sp,imm */
65 #define OP_STW_FP_SP_IMM 0x054bdfc0 /* stw fp,@(sp,imm) */
68 #define OP_OR_FP_R0_SP 0x03a3d03f /* or fp,r0,sp */
69 #define OP_OR_FP_SP_R0 0x03a3dfc0 /* or fp,sp,r0 */
70 #define OP_OR_FP_IMM0_SP 0x03abd03f /* or fp,0x0,sp */
71 #define OP_STW_FP_R22P_R0 0x0547d580 /* stw fp,@(r22+,r0) */
72 #define OP_STW_LR_R22P_R0 0x0547e580 /* stw lr,@(r22+,r0) */
74 #define OP_MASK_OP_AND_RB 0x0ff80fc0 /* keep op and rb,throw away rest */
75 #define OP_STW_SP_IMM 0x05480fc0 /* stw Ra,@(sp,imm) */
76 #define OP_ST2W_SP_IMM 0x05680fc0 /* st2w Ra,@(sp,imm) */
77 #define OP_STW_FP_IMM 0x05480f40 /* stw Ra,@(fp,imm) */
78 #define OP_STW_FP_R0 0x05400f40 /* stw Ra,@(fp,r0) */
80 #define OP_MASK_FM_BIT 0x80000000
81 #define OP_MASK_CC_BITS 0x70000000
82 #define OP_MASK_SUB_INST 0x0fffffff
84 #define EXTRACT_RA(op) (((op) >> 12) & 0x3f)
85 #define EXTRACT_RB(op) (((op) >> 6) & 0x3f)
86 #define EXTRACT_RC(op) (((op) & 0x3f)
87 #define EXTRACT_UIMM6(op) ((op) & 0x3f)
88 #define EXTRACT_IMM6(op) ((((int)EXTRACT_UIMM6(op)) << 26) >> 26)
89 #define EXTRACT_IMM26(op) ((((op)&0x0ff00000) >> 2) | ((op)&0x0003ffff))
90 #define EXTRACT_IMM32(opl, opr) ((EXTRACT_UIMM6(opl) << 26)|EXTRACT_IMM26(opr))
92 /* Discard from the stack the innermost frame, restoring all saved
98 struct frame_info *frame = get_current_frame ();
101 struct frame_saved_regs fsr;
104 fp = FRAME_FP (frame);
107 d30v_pop_dummy_frame(frame);
111 /* fill out fsr with the address of where each */
112 /* register was stored in the frame */
113 get_frame_saved_regs (frame, &fsr);
115 /* now update the current registers with the old values */
116 for (regnum = A0_REGNUM; regnum < A0_REGNUM+2 ; regnum++)
118 if (fsr.regs[regnum])
120 read_memory (fsr.regs[regnum], raw_buffer, 8);
121 write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 8);
124 for (regnum = 0; regnum < SP_REGNUM; regnum++)
126 if (fsr.regs[regnum])
128 write_register (regnum, read_memory_unsigned_integer (fsr.regs[regnum], 4));
131 if (fsr.regs[PSW_REGNUM])
133 write_register (PSW_REGNUM, read_memory_unsigned_integer (fsr.regs[PSW_REGNUM], 4));
136 write_register (PC_REGNUM, read_register(LR_REGNUM));
137 write_register (SP_REGNUM, fp + frame->size);
138 target_store_registers (-1);
139 flush_cached_frames ();
146 /* add sp,sp,imm -- observed */
147 if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM)
150 /* add r22,sp,imm -- observed */
151 if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM)
154 /* or fp,r0,sp -- observed */
155 if (op == OP_OR_FP_R0_SP)
159 if ((op & OP_MASK_OPCODE) == OP_NOP)
162 /* stw Ra,@(sp,r0) */
163 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_R0)
166 /* stw Ra,@(sp,0x0) */
167 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_IMM0)
170 /* st2w Ra,@(sp,r0) */
171 if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_R0)
174 /* st2w Ra,@(sp,0x0) */
175 if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_IMM0)
178 /* stw fp, @(r22+,r0) -- observed */
179 if (op == OP_STW_FP_R22P_R0)
182 /* stw r62, @(r22+,r0) -- observed */
183 if (op == OP_STW_LR_R22P_R0)
186 /* stw Ra, @(fp,r0) -- observed */
187 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_FP_R0)
188 return 1; /* first arg */
190 /* stw Ra, @(fp,imm) -- observed */
191 if ((op & OP_MASK_OP_AND_RB) == OP_STW_FP_IMM)
192 return 1; /* second and subsequent args */
194 /* stw fp,@(sp,imm) -- observed */
195 if ((op & OP_MASK_ALL_BUT_IMM) == OP_STW_FP_SP_IMM)
198 /* st2w Ra,@(r22+,r0) */
199 if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_R22P_R0)
203 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SPM)
206 /* st2w Ra, @(sp-) */
207 if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SPM)
210 /* sub.? sp,sp,imm */
211 if ((op & OP_MASK_ALL_BUT_IMM) == OP_SUB_SP_IMM)
218 d30v_skip_prologue (pc)
222 unsigned long opl, opr; /* left / right sub operations */
223 unsigned long fm0, fm1; /* left / right mode bits */
224 unsigned long cc0, cc1;
225 unsigned long op1, op2;
226 CORE_ADDR func_addr, func_end;
227 struct symtab_and_line sal;
229 /* If we have line debugging information, then the end of the */
230 /* prologue should the first assembly instruction of the first source line */
231 if (find_pc_partial_function (pc, NULL, &func_addr, &func_end))
233 sal = find_pc_line (func_addr, 0);
234 if ( sal.end && sal.end < func_end)
238 if (target_read_memory (pc, (char *)&op[0], 8))
239 return pc; /* Can't access it -- assume no prologue. */
243 opl = (unsigned long)read_memory_integer (pc, 4);
244 opr = (unsigned long)read_memory_integer (pc+4, 4);
246 fm0 = (opl & OP_MASK_FM_BIT);
247 fm1 = (opr & OP_MASK_FM_BIT);
249 cc0 = (opl & OP_MASK_CC_BITS);
250 cc1 = (opr & OP_MASK_CC_BITS);
252 opl = (opl & OP_MASK_SUB_INST);
253 opr = (opr & OP_MASK_SUB_INST);
257 /* long instruction (opl contains the opcode) */
258 if (((opl & OP_MASK_ALL_BUT_IMM) != OP_ADD_SP_IMM) && /* add sp,sp,imm */
259 ((opl & OP_MASK_ALL_BUT_IMM) != OP_ADD_R22_SP_IMM) && /* add r22,sp,imm */
260 ((opl & OP_MASK_OP_AND_RB) != OP_STW_SP_IMM) && /* stw Ra, @(sp,imm) */
261 ((opl & OP_MASK_OP_AND_RB) != OP_ST2W_SP_IMM)) /* st2w Ra, @(sp,imm) */
266 /* short instructions */
277 if (check_prologue(op1))
279 if (!check_prologue(op2))
281 /* if the previous opcode was really part of the prologue */
282 /* and not just a NOP, then we want to break after both instructions */
283 if ((op1 & OP_MASK_OPCODE) != OP_NOP)
296 /* Given a GDB frame, determine the address of the calling function's frame.
297 This will be used to create a new GDB frame struct, and then
298 INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
302 d30v_frame_chain (frame)
303 struct frame_info *frame;
305 struct frame_saved_regs fsr;
307 d30v_frame_find_saved_regs (frame, &fsr);
309 if (frame->return_pc == IMEM_START)
312 if (!fsr.regs[FP_REGNUM])
314 if (!fsr.regs[SP_REGNUM] || fsr.regs[SP_REGNUM] == STACK_START)
317 return fsr.regs[SP_REGNUM];
320 if (!read_memory_unsigned_integer(fsr.regs[FP_REGNUM],4))
323 return read_memory_unsigned_integer(fsr.regs[FP_REGNUM],4);
326 static int next_addr, uses_frame;
327 static int frame_size;
330 prologue_find_regs (op, fsr, addr)
332 struct frame_saved_regs *fsr;
338 /* add sp,sp,imm -- observed */
339 if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM)
341 offset = EXTRACT_IMM6(op);
342 /*next_addr += offset;*/
343 frame_size += -offset;
347 /* add r22,sp,imm -- observed */
348 if ((op & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM)
350 offset = EXTRACT_IMM6(op);
351 next_addr = (offset - frame_size);
355 /* stw Ra, @(fp, offset) -- observed */
356 if ((op & OP_MASK_OP_AND_RB) == OP_STW_FP_IMM)
359 offset = EXTRACT_IMM6(op);
360 fsr->regs[n] = (offset - frame_size);
364 /* stw Ra, @(fp, r0) -- observed */
365 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_FP_R0)
368 fsr->regs[n] = (- frame_size);
372 /* or fp,0,sp -- observed */
373 if ((op == OP_OR_FP_R0_SP) ||
374 (op == OP_OR_FP_SP_R0) ||
375 (op == OP_OR_FP_IMM0_SP))
382 if ((op & OP_MASK_OPCODE) == OP_NOP)
385 /* stw Ra,@(r22+,r0) -- observed */
386 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_R22P_R0)
389 fsr->regs[n] = next_addr;
393 #if 0 /* subsumed in pattern above */
394 /* stw fp,@(r22+,r0) -- observed */
395 if (op == OP_STW_FP_R22P_R0)
397 fsr->regs[FP_REGNUM] = next_addr; /* XXX */
402 /* stw r62,@(r22+,r0) -- observed */
403 if (op == OP_STW_LR_R22P_R0)
405 fsr->regs[LR_REGNUM] = next_addr;
410 /* st2w Ra,@(r22+,r0) -- observed */
411 if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_R22P_R0)
414 fsr->regs[n] = next_addr;
415 fsr->regs[n+1] = next_addr + 4;
421 if ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SPM)
424 fsr->regs[n] = next_addr;
429 /* st2w Ra, @(sp-) */
430 else if ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SPM)
433 fsr->regs[n] = next_addr;
434 fsr->regs[n+1] = next_addr+4;
440 if ((op & OP_MASK_ALL_BUT_IMM) == OP_SUB_SP_IMM)
442 offset = EXTRACT_IMM6(op);
443 frame_size += -offset;
447 /* st rn, @(sp,0) -- observed */
448 if (((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_R0) ||
449 ((op & OP_MASK_ALL_BUT_RA) == OP_STW_SP_IMM0))
452 fsr->regs[n] = (- frame_size);
456 /* st2w rn, @(sp,0) */
457 if (((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_R0) ||
458 ((op & OP_MASK_ALL_BUT_RA) == OP_ST2W_SP_IMM0))
461 fsr->regs[n] = (- frame_size);
462 fsr->regs[n+1] = (- frame_size) + 4;
469 /* Put here the code to store, into a struct frame_saved_regs, the
470 addresses of the saved registers of frame described by FRAME_INFO.
471 This includes special registers such as pc and fp saved in special
472 ways in the stack frame. sp is even more special: the address we
473 return for it IS the sp for the next frame. */
475 d30v_frame_find_saved_regs (fi, fsr)
476 struct frame_info *fi;
477 struct frame_saved_regs *fsr;
480 unsigned long opl, opr;
481 unsigned long op1, op2;
482 unsigned long fm0, fm1;
486 memset (fsr, 0, sizeof (*fsr));
490 pc = get_pc_function_start (fi->pc);
495 opl = (unsigned long)read_memory_integer (pc, 4);
496 opr = (unsigned long)read_memory_integer (pc+4, 4);
498 fm0 = (opl & OP_MASK_FM_BIT);
499 fm1 = (opr & OP_MASK_FM_BIT);
501 opl = (opl & OP_MASK_SUB_INST);
502 opr = (opr & OP_MASK_SUB_INST);
506 /* long instruction */
507 if ((opl & OP_MASK_ALL_BUT_IMM) == OP_ADD_SP_IMM)
510 long offset = EXTRACT_IMM32(opl, opr);
511 frame_size += -offset;
513 else if ((opl & OP_MASK_ALL_BUT_IMM) == OP_ADD_R22_SP_IMM)
515 /* add r22,sp,offset */
516 long offset = EXTRACT_IMM32(opl,opr);
517 next_addr = (offset - frame_size);
519 else if ((opl & OP_MASK_OP_AND_RB) == OP_STW_SP_IMM)
521 /* st Ra, @(sp,imm) */
522 long offset = EXTRACT_IMM32(opl, opr);
523 short n = EXTRACT_RA(opl);
524 fsr->regs[n] = (offset - frame_size);
526 else if ((opl & OP_MASK_OP_AND_RB) == OP_ST2W_SP_IMM)
528 /* st2w Ra, @(sp,offset) */
529 long offset = EXTRACT_IMM32(opl, opr);
530 short n = EXTRACT_RA(opl);
531 fsr->regs[n] = (offset - frame_size);
532 fsr->regs[n+1] = (offset - frame_size) + 4;
539 /* short instructions */
550 if (!prologue_find_regs(op1,fsr,pc) || !prologue_find_regs(op2,fsr,pc))
556 fi->size = frame_size;
557 if (!fp || !uses_frame)
559 fp = read_register(SP_REGNUM) | DMEM_START;
561 fp = read_register(SP_REGNUM);
563 for (i=0; i<NUM_REGS-1; i++)
566 fsr->regs[i] = fsr->regs[i] + fp + frame_size;
569 if (fsr->regs[LR_REGNUM])
570 fi->return_pc = read_memory_unsigned_integer(fsr->regs[LR_REGNUM],4);
572 fi->return_pc = read_register(LR_REGNUM);
574 /* the SP is not normally (ever?) saved, but check anyway */
575 if (!fsr->regs[SP_REGNUM])
577 /* if the FP was saved, that means the current FP is valid, */
578 /* otherwise, it isn't being used, so we use the SP instead */
580 fsr->regs[SP_REGNUM] = read_register(FP_REGNUM) + fi->size;
583 fsr->regs[SP_REGNUM] = fp + fi->size;
585 fsr->regs[FP_REGNUM] = 0;
591 d30v_init_extra_frame_info (fromleaf, fi)
593 struct frame_info *fi;
595 struct frame_saved_regs dummy;
597 if (fi->next && (fi->pc == 0))
598 fi->pc = fi->next->return_pc;
600 d30v_frame_find_saved_regs (fi, &dummy);
604 d30v_init_frame_pc (fromleaf, prev)
606 struct frame_info *prev;
608 /* default value, put here so we can breakpoint on it and
609 see if the default value is really the right thing to use */
610 prev->pc = (fromleaf ? SAVED_PC_AFTER_CALL (prev->next) : \
611 prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ());
614 static void d30v_print_register PARAMS ((int regnum, int tabular));
617 d30v_print_register (regnum, tabular)
621 if (regnum < A0_REGNUM)
624 printf_filtered ("%08x", read_register (regnum));
626 printf_filtered ("0x%x %d", read_register (regnum),
627 read_register (regnum));
631 char regbuf[MAX_REGISTER_RAW_SIZE];
633 read_relative_register_raw_bytes (regnum, regbuf);
635 val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0,
636 gdb_stdout, 'x', 1, 0, Val_pretty_default);
640 printf_filtered (" ");
641 val_print (REGISTER_VIRTUAL_TYPE (regnum), regbuf, 0,
642 gdb_stdout, 'd', 1, 0, Val_pretty_default);
650 long psw = read_register (PSW_REGNUM);
651 printf_filtered ("flags #1");
652 printf_filtered (" (sm) %d", (psw & PSW_SM) != 0);
653 printf_filtered (" (ea) %d", (psw & PSW_EA) != 0);
654 printf_filtered (" (db) %d", (psw & PSW_DB) != 0);
655 printf_filtered (" (ds) %d", (psw & PSW_DS) != 0);
656 printf_filtered (" (ie) %d", (psw & PSW_IE) != 0);
657 printf_filtered (" (rp) %d", (psw & PSW_RP) != 0);
658 printf_filtered (" (md) %d\n", (psw & PSW_MD) != 0);
660 printf_filtered ("flags #2");
661 printf_filtered (" (f0) %d", (psw & PSW_F0) != 0);
662 printf_filtered (" (f1) %d", (psw & PSW_F1) != 0);
663 printf_filtered (" (f2) %d", (psw & PSW_F2) != 0);
664 printf_filtered (" (f3) %d", (psw & PSW_F3) != 0);
665 printf_filtered (" (s) %d", (psw & PSW_S) != 0);
666 printf_filtered (" (v) %d", (psw & PSW_V) != 0);
667 printf_filtered (" (va) %d", (psw & PSW_VA) != 0);
668 printf_filtered (" (c) %d\n", (psw & PSW_C) != 0);
672 print_flags_command (args, from_tty)
680 d30v_do_registers_info (regnum, fpregs)
684 long long num1, num2;
689 if (reg_names[0] == NULL || reg_names[0][0] == '\000')
692 printf_filtered ("%s ", reg_names[regnum]);
693 d30v_print_register (regnum, 0);
695 printf_filtered ("\n");
699 /* Have to print all the registers. Format them nicely. */
701 printf_filtered ("PC=");
702 print_address (read_pc (), gdb_stdout);
704 printf_filtered (" PSW=");
705 d30v_print_register (PSW_REGNUM, 1);
707 printf_filtered (" BPC=");
708 print_address (read_register (BPC_REGNUM), gdb_stdout);
710 printf_filtered (" BPSW=");
711 d30v_print_register (BPSW_REGNUM, 1);
712 printf_filtered ("\n");
714 printf_filtered ("DPC=");
715 print_address (read_register (DPC_REGNUM), gdb_stdout);
717 printf_filtered (" DPSW=");
718 d30v_print_register (DPSW_REGNUM, 1);
720 printf_filtered (" IBA=");
721 print_address (read_register (IBA_REGNUM), gdb_stdout);
722 printf_filtered ("\n");
724 printf_filtered ("RPT_C=");
725 d30v_print_register (RPT_C_REGNUM, 1);
727 printf_filtered (" RPT_S=");
728 print_address (read_register (RPT_S_REGNUM), gdb_stdout);
730 printf_filtered (" RPT_E=");
731 print_address (read_register (RPT_E_REGNUM), gdb_stdout);
732 printf_filtered ("\n");
734 printf_filtered ("MOD_S=");
735 print_address (read_register (MOD_S_REGNUM), gdb_stdout);
737 printf_filtered (" MOD_E=");
738 print_address (read_register (MOD_E_REGNUM), gdb_stdout);
739 printf_filtered ("\n");
741 printf_filtered ("EIT_VB=");
742 print_address (read_register (EIT_VB_REGNUM), gdb_stdout);
744 printf_filtered (" INT_S=");
745 d30v_print_register (INT_S_REGNUM, 1);
747 printf_filtered (" INT_M=");
748 d30v_print_register (INT_M_REGNUM, 1);
749 printf_filtered ("\n");
752 for (regnum = 0; regnum <= 63;)
756 printf_filtered ("R%d-R%d ", regnum, regnum + 7);
758 printf_filtered (" ");
760 printf_filtered (" ");
762 for (i = 0; i < 8; i++)
764 printf_filtered (" ");
765 d30v_print_register (regnum++, 1);
768 printf_filtered ("\n");
771 printf_filtered ("A0-A1 ");
773 d30v_print_register (A0_REGNUM, 1);
774 printf_filtered (" ");
775 d30v_print_register (A1_REGNUM, 1);
776 printf_filtered ("\n");
780 d30v_fix_call_dummy (dummyname, start_sp, fun, nargs, args, type, gcc_p)
791 char buffer[MAX_REGISTER_RAW_SIZE];
792 struct frame_info *frame = get_current_frame ();
793 frame->dummy = start_sp;
794 /*start_sp |= DMEM_START;*/
797 for (regnum = 0; regnum < NUM_REGS; regnum++)
799 sp -= REGISTER_RAW_SIZE(regnum);
800 store_address (buffer, REGISTER_RAW_SIZE(regnum), read_register(regnum));
801 write_memory (sp, buffer, REGISTER_RAW_SIZE(regnum));
803 write_register (SP_REGNUM, (LONGEST)sp);
804 /* now we need to load LR with the return address */
805 write_register (LR_REGNUM, (LONGEST)d30v_call_dummy_address());
810 d30v_pop_dummy_frame (fi)
811 struct frame_info *fi;
813 CORE_ADDR sp = fi->dummy;
816 for (regnum = 0; regnum < NUM_REGS; regnum++)
818 sp -= REGISTER_RAW_SIZE(regnum);
819 write_register(regnum, read_memory_unsigned_integer (sp, REGISTER_RAW_SIZE(regnum)));
821 flush_cached_frames (); /* needed? */
826 d30v_push_arguments (nargs, args, sp, struct_return, struct_addr)
831 CORE_ADDR struct_addr;
833 int i, len, index=0, regnum=2;
834 char buffer[4], *contents;
839 /* Pass 1. Put all large args on stack */
840 for (i = 0; i < nargs; i++)
842 value_ptr arg = args[i];
843 struct type *arg_type = check_typedef (VALUE_TYPE (arg));
844 len = TYPE_LENGTH (arg_type);
845 contents = VALUE_CONTENTS(arg);
846 val = extract_signed_integer (contents, len);
849 /* put on stack and pass pointers */
851 write_memory (sp, contents, len);
858 for (i = 0; i < nargs; i++)
860 value_ptr arg = args[i];
861 struct type *arg_type = check_typedef (VALUE_TYPE (arg));
862 len = TYPE_LENGTH (arg_type);
863 contents = VALUE_CONTENTS(arg);
866 /* we need multiple registers */
869 for (ndx = 0; len > 0; ndx += 8, len -= 8)
872 regnum++; /* all args > 4 bytes start in even register */
876 val = extract_signed_integer (&contents[ndx], 4);
877 write_register (regnum++, val);
880 val = extract_signed_integer (&contents[ndx+4], 4);
882 val = extract_signed_integer (&contents[ndx+4], len-4);
883 write_register (regnum++, val);
887 /* no more registers available. put it on the stack */
889 /* all args > 4 bytes are padded to a multiple of 8 bytes
890 and start on an 8 byte boundary */
892 sp -= (sp & 7); /* align it */
894 sp -= ((len + 7) & ~7); /* allocate space */
895 write_memory (sp, &contents[ndx], len);
904 val = extract_signed_integer (contents, len);
905 write_register (regnum++, val);
909 /* all args are padded to a multiple of 4 bytes (at least) */
910 sp -= ((len + 3) & ~3);
911 write_memory (sp, contents, len);
916 /* stack pointer is not on an 8 byte boundary -- align it */
922 /* pick an out-of-the-way place to set the return value */
923 /* for an inferior function call. The link register is set to this */
924 /* value and a momentary breakpoint is set there. When the breakpoint */
925 /* is hit, the dummy frame is popped and the previous environment is */
929 d30v_call_dummy_address ()
932 struct minimal_symbol *sym;
934 entry = entry_point_address ();
939 sym = lookup_minimal_symbol ("_start", NULL, symfile_objfile);
941 if (!sym || MSYMBOL_TYPE (sym) != mst_text)
944 return SYMBOL_VALUE_ADDRESS (sym);
947 /* Given a return value in `regbuf' with a type `valtype',
948 extract and copy its value into `valbuf'. */
951 d30v_extract_return_value (valtype, regbuf, valbuf)
952 struct type *valtype;
953 char regbuf[REGISTER_BYTES];
956 memcpy (valbuf, regbuf + REGISTER_BYTE (2), TYPE_LENGTH (valtype));
959 /* The following code implements access to, and display of, the D30V's
960 instruction trace buffer. The buffer consists of 64K or more
961 4-byte words of data, of which each words includes an 8-bit count,
962 an 8-bit segment number, and a 16-bit instruction address.
964 In theory, the trace buffer is continuously capturing instruction
965 data that the CPU presents on its "debug bus", but in practice, the
966 ROMified GDB stub only enables tracing when it continues or steps
967 the program, and stops tracing when the program stops; so it
968 actually works for GDB to read the buffer counter out of memory and
969 then read each trace word. The counter records where the tracing
970 stops, but there is no record of where it started, so we remember
971 the PC when we resumed and then search backwards in the trace
972 buffer for a word that includes that address. This is not perfect,
973 because you will miss trace data if the resumption PC is the target
974 of a branch. (The value of the buffer counter is semi-random, any
975 trace data from a previous program stop is gone.) */
977 /* The address of the last word recorded in the trace buffer. */
979 #define DBBC_ADDR (0xd80000)
981 /* The base of the trace buffer, at least for the "Board_0". */
983 #define TRACE_BUFFER_BASE (0xf40000)
985 static void trace_command PARAMS ((char *, int));
987 static void untrace_command PARAMS ((char *, int));
989 static void trace_info PARAMS ((char *, int));
991 static void tdisassemble_command PARAMS ((char *, int));
993 static void display_trace PARAMS ((int, int));
995 /* True when instruction traces are being collected. */
1001 static CORE_ADDR last_pc;
1003 /* True when trace output should be displayed whenever program stops. */
1005 static int trace_display;
1007 /* True when trace listing should include source lines. */
1009 static int default_trace_show_source = 1;
1011 struct trace_buffer {
1018 trace_command (args, from_tty)
1022 /* Clear the host-side trace buffer, allocating space if needed. */
1023 trace_data.size = 0;
1024 if (trace_data.counts == NULL)
1025 trace_data.counts = (short *) xmalloc (65536 * sizeof(short));
1026 if (trace_data.addrs == NULL)
1027 trace_data.addrs = (CORE_ADDR *) xmalloc (65536 * sizeof(CORE_ADDR));
1031 printf_filtered ("Tracing is now on.\n");
1035 untrace_command (args, from_tty)
1041 printf_filtered ("Tracing is now off.\n");
1045 trace_info (args, from_tty)
1051 if (trace_data.size)
1053 printf_filtered ("%d entries in trace buffer:\n", trace_data.size);
1055 for (i = 0; i < trace_data.size; ++i)
1057 printf_filtered ("%d: %d instruction%s at 0x%x\n",
1058 i, trace_data.counts[i],
1059 (trace_data.counts[i] == 1 ? "" : "s"),
1060 trace_data.addrs[i]);
1064 printf_filtered ("No entries in trace buffer.\n");
1066 printf_filtered ("Tracing is currently %s.\n", (tracing ? "on" : "off"));
1069 /* Print the instruction at address MEMADDR in debugged memory,
1070 on STREAM. Returns length of the instruction, in bytes. */
1073 print_insn (memaddr, stream)
1077 /* If there's no disassembler, something is very wrong. */
1078 if (tm_print_insn == NULL)
1081 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
1082 tm_print_insn_info.endian = BFD_ENDIAN_BIG;
1084 tm_print_insn_info.endian = BFD_ENDIAN_LITTLE;
1085 return (*tm_print_insn) (memaddr, &tm_print_insn_info);
1089 d30v_eva_prepare_to_trace ()
1094 last_pc = read_register (PC_REGNUM);
1097 /* Collect trace data from the target board and format it into a form
1098 more useful for display. */
1101 d30v_eva_get_trace_data ()
1103 int count, i, j, oldsize;
1104 int trace_addr, trace_seg, trace_cnt, next_cnt;
1105 unsigned int last_trace, trace_word, next_word;
1106 unsigned int *tmpspace;
1111 tmpspace = xmalloc (65536 * sizeof(unsigned int));
1113 last_trace = read_memory_unsigned_integer (DBBC_ADDR, 2) << 2;
1115 /* Collect buffer contents from the target, stopping when we reach
1116 the word recorded when execution resumed. */
1119 while (last_trace > 0)
1123 read_memory_unsigned_integer (TRACE_BUFFER_BASE + last_trace, 4);
1124 trace_addr = trace_word & 0xffff;
1126 /* Ignore an apparently nonsensical entry. */
1127 if (trace_addr == 0xffd5)
1129 tmpspace[count++] = trace_word;
1130 if (trace_addr == last_pc)
1136 /* Move the data to the host-side trace buffer, adjusting counts to
1137 include the last instruction executed and transforming the address
1138 into something that GDB likes. */
1140 for (i = 0; i < count; ++i)
1142 trace_word = tmpspace[i];
1143 next_word = ((i == 0) ? 0 : tmpspace[i - 1]);
1144 trace_addr = trace_word & 0xffff;
1145 next_cnt = (next_word >> 24) & 0xff;
1146 j = trace_data.size + count - i - 1;
1147 trace_data.addrs[j] = (trace_addr << 2) + 0x1000000;
1148 trace_data.counts[j] = next_cnt + 1;
1151 oldsize = trace_data.size;
1152 trace_data.size += count;
1157 display_trace (oldsize, trace_data.size);
1161 tdisassemble_command (arg, from_tty)
1166 CORE_ADDR low, high;
1172 high = trace_data.size;
1174 else if (!(space_index = (char *) strchr (arg, ' ')))
1176 low = parse_and_eval_address (arg);
1181 /* Two arguments. */
1182 *space_index = '\0';
1183 low = parse_and_eval_address (arg);
1184 high = parse_and_eval_address (space_index + 1);
1189 printf_filtered ("Dump of trace from %d to %d:\n", low, high);
1191 display_trace (low, high);
1193 printf_filtered ("End of trace dump.\n");
1194 gdb_flush (gdb_stdout);
1198 display_trace (low, high)
1201 int i, count, trace_show_source, first, suppress;
1202 CORE_ADDR next_address;
1204 trace_show_source = default_trace_show_source;
1205 if (!have_full_symbols () && !have_partial_symbols())
1207 trace_show_source = 0;
1208 printf_filtered ("No symbol table is loaded. Use the \"file\" command.\n");
1209 printf_filtered ("Trace will not display any source.\n");
1214 for (i = low; i < high; ++i)
1216 next_address = trace_data.addrs[i];
1217 count = trace_data.counts[i];
1221 if (trace_show_source)
1223 struct symtab_and_line sal, sal_prev;
1225 sal_prev = find_pc_line (next_address - 4, 0);
1226 sal = find_pc_line (next_address, 0);
1230 if (first || sal.line != sal_prev.line)
1231 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
1237 /* FIXME-32x64--assumes sal.pc fits in long. */
1238 printf_filtered ("No source file for address %s.\n",
1239 local_hex_string((unsigned long) sal.pc));
1244 print_address (next_address, gdb_stdout);
1245 printf_filtered (":");
1246 printf_filtered ("\t");
1248 next_address = next_address + print_insn (next_address, gdb_stdout);
1249 printf_filtered ("\n");
1250 gdb_flush (gdb_stdout);
1255 extern void (*target_resume_hook) PARAMS ((void));
1256 extern void (*target_wait_loop_hook) PARAMS ((void));
1259 _initialize_d30v_tdep ()
1261 tm_print_insn = print_insn_d30v;
1263 target_resume_hook = d30v_eva_prepare_to_trace;
1264 target_wait_loop_hook = d30v_eva_get_trace_data;
1266 add_info ("flags", print_flags_command, "Print d30v flags.");
1268 add_com ("trace", class_support, trace_command,
1269 "Enable tracing of instruction execution.");
1271 add_com ("untrace", class_support, untrace_command,
1272 "Disable tracing of instruction execution.");
1274 add_com ("tdisassemble", class_vars, tdisassemble_command,
1275 "Disassemble the trace buffer.\n\
1276 Two optional arguments specify a range of trace buffer entries\n\
1277 as reported by info trace (NOT addresses!).");
1279 add_info ("trace", trace_info,
1280 "Display info about the trace data buffer.");
1282 add_show_from_set (add_set_cmd ("tracedisplay", no_class,
1283 var_integer, (char *)&trace_display,
1284 "Set automatic display of trace.\n", &setlist),
1286 add_show_from_set (add_set_cmd ("tracesource", no_class,
1287 var_integer, (char *)&default_trace_show_source,
1288 "Set display of source code with trace.\n", &setlist),