89 lines
3.5 KiB
C
89 lines
3.5 KiB
C
#include <debug.h>
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#include <stdio.h>
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#include <cpu.h>
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#include <emu.h>
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#include <bus.h>
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#include <string.h>
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static debug_context ctx;
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debug_context *debug_get_context() {
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return &ctx;
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}
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static char **dissasembly;
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void debug_init() {
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dissasembly = malloc(sizeof(char*) * 0x10000);
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for(int i = 0; i < 0x10000; i++) {
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dissasembly[i] = malloc(sizeof(char) * 100);
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}
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}
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void debug_update() {
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switch(ctx.state) {
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case DS_MAIN:
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char flags[16];
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sprintf(flags, "%c%c%c%c",
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cpu_get_context()->regs.f & (1 << 7) ? 'Z' : '-',
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cpu_get_context()->regs.f & (1 << 6) ? 'N' : '-',
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cpu_get_context()->regs.f & (1 << 5) ? 'H' : '-',
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cpu_get_context()->regs.f & (1 << 4) ? 'C' : '-'
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);
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char inst[16];
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inst_to_str(cpu_get_context(), inst);
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printf("%08lX - %04X: %-12s (%02X %02X %02X) A: %02X F: %s BC: %02X%02X DE: %02X%02X HL: %02X%02X SP: %04X PC: %04X\n", emu_get_context()->ticks, cpu_get_context()->inst_pc, inst, cpu_get_context()->cur_opcode, bus_read(cpu_get_context()->inst_pc+1), bus_read(cpu_get_context()->inst_pc+2), cpu_get_context()->regs.a, flags, cpu_get_context()->regs.b, cpu_get_context()->regs.c, cpu_get_context()->regs.d, cpu_get_context()->regs.e, cpu_get_context()->regs.h, cpu_get_context()->regs.l, cpu_get_context()->regs.sp, cpu_get_context()->regs.pc);
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printf("> ");
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char cmd[128];
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scanf("%s", cmd);
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if(!strcmp(cmd, "q")) {
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emu_get_context()->die = true;
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emu_get_context()->debug = false;
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emu_get_context()->paused = false;
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emu_stop();
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} else if(!strcmp(cmd, "r")) {
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emu_get_context()->debug = false;
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emu_get_context()->paused = false;
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} else if(!strcmp(cmd, "d")) {
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ctx.dissasembly_target = cpu_get_context()->inst_pc;
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ctx.state = DS_DISASSEMBLE;
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} else if(!strcmp(cmd, "da")) {
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scanf("%d", &ctx.dissasembly_target);
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ctx.state = DS_DISASSEMBLE;
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} else if(cmd[0] == 'b' && cmd[1] == 'p') {
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scanf("%X", &ctx.breakpoint);
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//printf("Set breakpoint to %04X\n", ctx.breakpoint);
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} else if(cmd[0] == 's') {
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int steps;
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scanf("%d", &steps);
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//printf("adding %d steps\n", steps);
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emu_get_context()->step += steps;
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emu_get_context()->debug = false;
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}
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break;
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case DS_DISASSEMBLE:
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cpu_context cpu_ctx = {0};
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u16 i = 0;
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while (cpu_ctx.regs.pc <= 0xFFFF) {
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u16 pc = cpu_ctx.regs.pc;
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fetch_instruction(&cpu_ctx);
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fetch_data(&cpu_ctx);
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char inst[16];
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inst_to_str(&cpu_ctx, inst);
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sprintf(dissasembly[i], "%04X: %s", pc, inst);
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if(pc == cpu_get_context()->inst_pc) {
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ctx.dissasembly_scroll = i - 5;
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ctx.dissasembly_pc = i;
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}
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i++;
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if(cpu_ctx.regs.pc < pc)
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break;
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}
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for(int j = ctx.dissasembly_scroll; j < ctx.dissasembly_pc+6; j++) {
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printf("%c %s\n", j == ctx.dissasembly_pc ? '>' : ' ', dissasembly[j]);
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}
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ctx.state = DS_MAIN;
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break;
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}
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} |