GDB Stub: Initial commit

src/cpu/386.c

@@ -22,6 +22,7 @@
 #include <86box/fdd.h>
 #include <86box/fdc.h>
 #include <86box/machine.h>
+#include <86box/gdbstub.h>
 #include "386_common.h"
 #ifdef USE_NEW_DYNAREC
 #include "codegen.h"
@@ -256,6 +257,11 @@ exec386(int cycs)
 
 		if (TIMER_VAL_LESS_THAN_VAL(timer_target, (uint32_t) tsc))
 			timer_process_inline();
+
+#ifdef USE_GDBSTUB
+		if (gdbstub_singlestep)
+			return;
+#endif
 	}
     }
 }

src/cpu/808x.c

@@ -34,6 +34,7 @@
 #include <86box/pic.h>
 #include <86box/ppi.h>
 #include <86box/timer.h>
+#include <86box/gdbstub.h>
 
 /* Is the CPU 8088 or 8086. */
 int is8086 = 0;
@@ -2832,5 +2833,10 @@ execx86(int cycs)
 
 		cpu_alu_op = 0;
 	}
+
+#ifdef USE_GDBSTUB
+		if (gdbstub_singlestep)
+			return;
+#endif
     }
 }