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comparison debug.c @ 566:624dd5106060

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Add backtrace (bt) command to 68K debugger
author Michael Pavone <pavone@retrodev.com>
date Sun, 02 Mar 2014 14:41:43 -0800
parents 9324f721efa6
children f822d9216968
comparison
equal deleted inserted replaced
565:9324f721efa6 566:624dd5106060
529 case 'c': 529 case 'c':
530 puts("Continuing"); 530 puts("Continuing");
531 debugging = 0; 531 debugging = 0;
532 break; 532 break;
533 case 'b': 533 case 'b':
534 param = find_param(input_buf); 534 if (input_buf[1] == 't') {
535 if (!param) { 535 uint32_t stack = context->aregs[7];
536 fputs("b command requires a parameter\n", stderr); 536 if (stack >= 0xE00000) {
537 break; 537 stack &= 0xFFFF;
538 } 538 uint8_t non_adr_count = 0;
539 value = strtol(param, NULL, 16); 539 do {
540 insert_breakpoint(context, value, (uint8_t *)debugger); 540 uint32_t bt_address = ram[stack/2] << 16 | ram[stack/2+1];
541 new_bp = malloc(sizeof(bp_def)); 541 bt_address = get_instruction_start(context->native_code_map, bt_address - 2);
542 new_bp->next = breakpoints; 542 if (bt_address) {
543 new_bp->address = value; 543 stack += 4;
544 new_bp->index = bp_index++; 544 non_adr_count = 0;
545 breakpoints = new_bp; 545 uint16_t *bt_pc = NULL;
546 printf("68K Breakpoint %d set at %X\n", new_bp->index, value); 546 if (bt_address < 0x400000) {
547 bt_pc = cart + bt_address/2;
548 } else if(bt_address > 0xE00000) {
549 bt_pc = ram + (bt_address & 0xFFFF)/2;
550 }
551 m68k_decode(bt_pc, &inst, bt_address);
552 m68k_disasm(&inst, input_buf);
553 printf("%X: %s\n", bt_address, input_buf);
554 } else {
555 //non-return address value on stack can be word wide
556 stack += 2;
557 non_adr_count++;
558 }
559 stack &= 0xFFFF;
560 } while (stack && non_adr_count < 6);
561 }
562 } else {
563 param = find_param(input_buf);
564 if (!param) {
565 fputs("b command requires a parameter\n", stderr);
566 break;
567 }
568 value = strtol(param, NULL, 16);
569 insert_breakpoint(context, value, (uint8_t *)debugger);
570 new_bp = malloc(sizeof(bp_def));
571 new_bp->next = breakpoints;
572 new_bp->address = value;
573 new_bp->index = bp_index++;
574 breakpoints = new_bp;
575 printf("68K Breakpoint %d set at %X\n", new_bp->index, value);
576 }
547 break; 577 break;
548 case 'a': 578 case 'a':
549 param = find_param(input_buf); 579 param = find_param(input_buf);
550 if (!param) { 580 if (!param) {
551 fputs("a command requires a parameter\n", stderr); 581 fputs("a command requires a parameter\n", stderr);