Implement paging

2 files changed, 11 insertions, 0 deletions

diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index 49116df..ffe9073 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -2,6 +2,7 @@
 #define _STDLIB_H_
 
 #include <stddef.h>
+#include <stdio.h>
 
 /* this is by no means standards-compliant... but who cares? :P */
 
@@ -18,5 +19,8 @@ void srand(unsigned int);
 int abs(int);
 void *malloc(size_t);
 int snprintf(char*, int, const char*, ...);
+void assert_fail(const char*, const char*, int);
+
+#define assert(x) if(!(x))assert_fail(__func__, __FILE__, __LINE__);
 
 #endif
diff --git a/libc/stdlib.c b/libc/stdlib.c
index c6a9c3d..bb30039 100644
--- a/libc/stdlib.c
+++ b/libc/stdlib.c
@@ -2,6 +2,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <stdlib.h>
+#include "panic.h"
 
 /* adapted from <http://www.strudel.org.uk/itoa/> */
 char* itoa(int val, int base)
@@ -150,3 +151,9 @@ int snprintf(char *buf, int sz, const char *fmt, ...)
     va_end(ap);
     return 0;
 }
+
+void assert_fail(const char *func, const char *file, int line)
+{
+    printf("\nAssertion failed in function %s in file %s, line %d\n", func, file, line);
+    panic("assertion failed!\n");
+}