1 files changed, 37 insertions, 0 deletions
diff --git a/src/_syscall.h b/src/_syscall.h
new file mode 100644
index 00000000..fb100151
--- /dev/null
+++ b/src/_syscall.h
@@ -0,0 +1,37 @@
+#ifndef ___SYSCALL_H__
+#define ___SYSCALL_H__
+
+#include <errno.h>
+#ifndef ENOSYS
+#include "errno/ENOSYS.c"
+#endif
+
+#include <nonstd/internal.h>
+
+#define SYSCALL(_name, _type, _err, _a1, _a2, _a3, _a4, _a5, _a6) \
+	static int _scno = -2; \
+	if (_scno == -2) { \
+		_scno = __syscall_lookup(_name); \
+	} \
+	long _ret = __syscall(_scno, _a1, _a2, _a3, _a4, _a5, _a6); \
+	if (_ret < 0) { \
+		errno = -_ret; \
+		return _err; \
+	} \
+	return (_type)_ret
+
+#define SYSCALL_NUMBER(_var, _name, _notfound) \
+	static long _var = -2; \
+	do { \
+		if (_var == -2) { \
+			(_var) = __syscall_lookup(_name); \
+		} \
+		if (_var == -1) { \
+			errno = ENOSYS; \
+			return (_notfound); } \
+	} while (0)
+
+long __syscall(long __number, ...);
+long __syscall_lookup(const char *name);
+
+#endif