1 files changed, 23 insertions, 0 deletions
diff --git a/src/emu/syscall.c b/src/emu/syscall.c
new file mode 100644
index 0000000..fe0d83e
--- /dev/null
+++ b/src/emu/syscall.c
@@ -0,0 +1,23 @@
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "cpu.h"
+#include "mem.h"
+#include "syscall.h"
+
+void do_syscall(void)
+{
+	switch (GPR[1]) {
+	case SYS_exit:
+		exit(GPR[2]);
+		break;
+	case SYS_read:
+		GPR[2] = read(GPR[2], &MEM[GPR[3]], GPR[4]);
+		break;
+	case SYS_write:
+		GPR[2] = write(GPR[2], &MEM[GPR[3]], GPR[4]);
+		break;
+	default:
+		GPR[2] = -1;
+	}
+}