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/syscall.h | 83 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 include/arch/x86_64/asm/syscall.h

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

diff --git a/include/arch/x86_64/asm/syscall.h b/include/arch/x86_64/asm/syscall.h
new file mode 100644
index 00000000..b3d1ae48
--- /dev/null
+++ b/include/arch/x86_64/asm/syscall.h
@@ -0,0 +1,83 @@
+#ifndef __ASM_SYSCALL_H
+#define __ASM_SYSCALL_H
+
+static __inline long __syscall0(long n)
+{
+	unsigned long ret;
+	__asm__ volatile("syscall"
+			 : "=a"(ret)
+			 : "a"(n)
+			 : "rcx", "r11", "memory");
+	return ret;
+}
+
+static __inline long __syscall1(long n, long a1)
+{
+	unsigned long ret;
+	__asm__ __volatile__("syscall"
+			     : "=a"(ret)
+			     : "a"(n), "D"(a1)
+			     : "rcx", "r11", "memory");
+	return ret;
+}
+
+static inline long __syscall2(long n, long a1, long a2)
+{
+	unsigned long ret;
+	__asm__ volatile("syscall"
+			 : "=a"(ret)
+			 : "a"(n), "D"(a1), "S"(a2)
+			 : "rcx", "r11", "memory");
+	return ret;
+}
+
+static inline long __syscall3(long n, long a1, long a2, long a3)
+{
+	unsigned long ret;
+	__asm__ volatile("syscall"
+			 : "=a"(ret)
+			 : "a"(n), "D"(a1), "S"(a2), "d"(a3)
+			 : "rcx", "r11", "memory");
+	return ret;
+}
+
+static inline long __syscall4(long n, long a1, long a2, long a3, long a4)
+{
+	unsigned long ret;
+	register long r10 __asm__("r10") = a4;
+	__asm__ volatile("syscall"
+			 : "=a"(ret)
+			 : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10)
+			 : "rcx", "r11", "memory");
+	return ret;
+}
+
+static inline long __syscall5(long n, long a1, long a2, long a3, long a4,
+			      long a5)
+{
+	unsigned long ret;
+	register long r10 __asm__("r10") = a4;
+	register long r8 __asm__("r8") = a5;
+	__asm__ volatile("syscall"
+			 : "=a"(ret)
+			 : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r8)
+			 : "rcx", "r11", "memory");
+	return ret;
+}
+
+static inline long __syscall6(long n, long a1, long a2, long a3, long a4,
+			      long a5, long a6)
+{
+	unsigned long ret;
+	register long r10 __asm__("r10") = a4;
+	register long r8 __asm__("r8") = a5;
+	register long r9 __asm__("r9") = a6;
+	__asm__ volatile("syscall"
+			 : "=a"(ret)
+			 : "a"(n), "D"(a1), "S"(a2), "d"(a3), "r"(r10), "r"(r8),
+			   "r"(r9)
+			 : "rcx", "r11", "memory");
+	return ret;
+}
+
+#endif
-- 
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