mirror of
https://github.com/st3fan/ewm.git
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93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
// The MIT License (MIT)
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//
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// Copyright (c) 2015 Stefan Arentz - http://github.com/st3fan/ewm
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include <stdlib.h>
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#include <stdio.h>
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#include <readline/readline.h>
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#include <readline/history.h>
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#include <SDL2/SDL.h>
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#include "cpu.h"
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#include "dbg.h"
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static int ewm_dbg_thread(void *object) {
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struct ewm_dbg_t *dbg = (struct ewm_dbg_t*) object;
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printf("Welcome to the EWM debugger\n");
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while (1) {
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// Wait for the CPU to pause
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while (dbg->cpu->status == EWM_CPU_STATUS_RUNNING) {
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// TODO Replace this with a condition variable
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}
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printf("%.4x: A=%.2x X=%.2x Y=%.2x SP=%.2x\n", dbg->cpu->state.pc, dbg->cpu->state.a,
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dbg->cpu->state.x, dbg->cpu->state.y, dbg->cpu->state.sp);
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char *line = readline("(ewm) ");
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if (strcmp(line, "quit") == 0) {
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exit(0);
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}
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if (strcmp(line, "run") == 0) {
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ewm_dbg_continue(dbg);
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continue;
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}
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if (strcmp(line, "br $ffef") == 0) {
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dbg_breakpoint_set(dbg, 0xffef);
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}
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printf("Sorry I don't understand that\n");
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}
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return 0;
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}
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int ewm_dbg_start(struct ewm_dbg_t *dbg) {
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SDL_Thread *thread = SDL_CreateThread(ewm_dbg_thread, "ewm: debugger", dbg);
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if (thread == NULL) {
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return -1;
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}
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return 0;
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}
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void ewm_dbg_pause(struct ewm_dbg_t *dbg) {
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dbg->cpu->status = EWM_CPU_STATUS_PAUSED;
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}
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void ewm_dbg_continue(struct ewm_dbg_t *dbg) {
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dbg->cpu->status = EWM_CPU_STATUS_RUNNING;
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}
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void ewm_dbg_breakpoint_set(struct ewm_dbg_t *dbg, uint16_t addr) {
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printf("Setting breakpoint at %.4x\n", addr);
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}
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struct ewm_dbg_t *ewm_dbg_create(struct cpu_t *cpu) {
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struct ewm_dbg_t *dbg = (struct ewm_dbg_t*) malloc(sizeof(struct ewm_dbg_t));
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if (dbg != NULL) {
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dbg->cpu = cpu;
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}
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return dbg;
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}
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