From fc00c656c96528112d05cf0edf8631bd5eaea446 Mon Sep 17 00:00:00 2001
From: Kacper <kacper@mail.openlinux.dev>
Date: Sun, 7 Dec 2025 20:10:31 +0100
Subject: Add build system scaffolding and libc headers

---
 include/arch/x86_64/asm/unistd.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 include/arch/x86_64/asm/unistd.h

(limited to 'include/arch/x86_64/asm/unistd.h')

diff --git a/include/arch/x86_64/asm/unistd.h b/include/arch/x86_64/asm/unistd.h
new file mode 100644
index 00000000..de56ec6a
--- /dev/null
+++ b/include/arch/x86_64/asm/unistd.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _ASM_X86_UNISTD_H
+#define _ASM_X86_UNISTD_H
+
+/*
+ * x32 syscall flag bit.  Some user programs expect syscall NR macros
+ * and __X32_SYSCALL_BIT to have type int, even though syscall numbers
+ * are, for practical purposes, unsigned long.
+ *
+ * Fortunately, expressions like (nr & ~__X32_SYSCALL_BIT) do the right
+ * thing regardless.
+ */
+#define __X32_SYSCALL_BIT 0x40000000
+
+#ifdef __i386__
+#include <asm/unistd_32.h>
+#elif defined(__ILP32__)
+#include <asm/unistd_x32.h>
+#else
+#include <asm/unistd_64.h>
+#endif
+
+#endif /* _ASM_X86_UNISTD_H */
-- 
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