Make KDEBUG functionality play nice with gdb remote debugging

1 files changed, 14 insertions, 4 deletions

diff --git a/vdp.c b/vdp.c
index 18b2eae..5a90e8b 100644
--- a/vdp.c
+++ b/vdp.c
@@ -3809,14 +3809,24 @@ int vdp_control_port_write(vdp_context * context, uint16_t value)
 					context->kmod_msg_buffer[context->kmod_buffer_length - 1] = c;
 				} else if (context->kmod_buffer_length) {
 					context->kmod_msg_buffer[context->kmod_buffer_length] = 0;
-					init_terminal();
-					printf("KDEBUG MESSAGE: %s\n", context->kmod_msg_buffer);
+					if (is_stdout_enabled()) {
+						init_terminal();
+						printf("KDEBUG MESSAGE: %s\n", context->kmod_msg_buffer);
+					} else {
+						// GDB remote debugging is enabled, use stderr instead
+						fprintf(stderr, "KDEBUG MESSAGE: %s\n", context->kmod_msg_buffer);
+					}
 					context->kmod_buffer_length = 0;
 				}
 			} else if (reg == REG_KMOD_TIMER) {
 				if (!(value & 0x80)) {
-					init_terminal();
-					printf("KDEBUG TIMER: %d\n", (context->cycles - context->timer_start_cycle) / 7);
+					if (is_stdout_enabled()) {
+						init_terminal();
+						printf("KDEBUG TIMER: %d\n", (context->cycles - context->timer_start_cycle) / 7);
+					} else {
+						// GDB remote debugging is enabled, use stderr instead
+						fprintf(stderr, "KDEBUG TIMER: %d\n", (context->cycles - context->timer_start_cycle) / 7);
+					}
 				}
 				if (value & 0xC0) {
 					context->timer_start_cycle = context->cycles;