Begin implementation of syscalls.

2 files changed, 17 insertions, 6 deletions

diff --git a/src/lib/libkogata/start.c b/src/lib/libkogata/start.c
index 030423c..9ba7edf 100644
--- a/src/lib/libkogata/start.c
+++ b/src/lib/libkogata/start.c
@@ -1,12 +1,12 @@
-#include <stddef.h>
-#include <stdint.h>
-#include <stdbool.h>
+#include <syscall.h>
 
 extern int main(int, char**);
 
 void __libkogata_start() {
 	// TODO : setup
 
-	main(0, 0);
+	int ret = main(0, 0);
+
+	exit(ret);
 }
 
diff --git a/src/lib/libkogata/syscall.c b/src/lib/libkogata/syscall.c
index 234b9ff..dc7e648 100644
--- a/src/lib/libkogata/syscall.c
+++ b/src/lib/libkogata/syscall.c
@@ -1,10 +1,21 @@
 #include <debug.h>
 #include <syscall.h>
 
+#include <string.h>
+
 void dbg_print(const char* str) {
-	// TODO
+
+	char buf[256];
+	strncpy(buf, str, 256);
+	buf[255] = 0;
+
+	asm volatile("int $0x40"::"a"(SC_DBG_PRINT),"b"(buf));
 }
 
 void yield() {
-	// TODO
+	asm volatile("int $0x40"::"a"(SC_YIELD));
+}
+
+void exit(int code) {
+	asm volatile("int $0x40"::"a"(SC_EXIT),"b"(code));
 }