Added dyn allocator + syscall wrappers + minor fixes.

1 files changed, 22 insertions, 0 deletions

diff --git a/lib/src/syscalls.c b/lib/src/syscalls.c
new file mode 100644
index 0000000..d6ac1a5
--- /dev/null
+++ b/lib/src/syscalls.c
@@ -0,0 +1,22 @@
+// Copyright (c) 2021 Johannes Stoelp
+
+#include <asm/unistd.h>  // __NR_*
+#include <syscall.h>
+#include <syscalls.h>
+
+int open(const char* path, int flags) {
+    return syscall2(__NR_open, path, flags);
+}
+
+ssize_t read(int fd, void* buf, size_t count) {
+    return syscall3(__NR_read, fd, buf, count);
+}
+
+off_t lseek(int fd, off_t offset, int whence) {
+    return syscall3(__NR_lseek, fd, offset, whence);
+}
+
+void _exit(int status) {
+    syscall1(__NR_exit, status);
+    __builtin_unreachable();
+}