From f163a5d5f6802f63092229f0f9326e5fb44b7908 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 9 Aug 2020 21:55:42 +0200
Subject: Added malloc/free syscall

---
 lib/inc/mem.h | 13 +++++++++++--
 lib/inc/sys.h |  2 +-
 2 files changed, 12 insertions(+), 3 deletions(-)

(limited to 'lib/inc')

diff --git a/lib/inc/mem.h b/lib/inc/mem.h
index e2d574f..9399b54 100644
--- a/lib/inc/mem.h
+++ b/lib/inc/mem.h
@@ -5,8 +5,17 @@
 
 #include <def.h>
 
-#define malloc(n) ((void *)((HEAP += n) - n)) // TODO: Implement real/better malloc/free
-#define free(x)
+// Huh
+#ifdef kernel
+#define malloc(n) (void *)((HEAP += n) - n) // TODO: Implement real/better malloc/free
+#define free(ptr)
+#elif defined(userspace)
+#include <sys.h>
+#define malloc(n) (void *)sys1(SYS_MALLOC, n)
+#define free(ptr) (void)(sys1(SYS_FREE, (int)ptr))
+#else
+#error "No lib target specified. Please use -Dkernel or -Duserspace"
+#endif
 
 // TODO: Use malloc as syscall
 u32 HEAP;
diff --git a/lib/inc/sys.h b/lib/inc/sys.h
index aaeb6ca..aefaead 100644
--- a/lib/inc/sys.h
+++ b/lib/inc/sys.h
@@ -4,7 +4,7 @@
 #ifndef SYS_H
 #define SYS_H
 
-enum sys { SYS_HALT, SYS_EXEC };
+enum sys { SYS_LOOP, SYS_MALLOC, SYS_FREE, SYS_EXEC };
 
 int sys0(enum sys num);
 int sys1(enum sys num, int d1);
-- 
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