From 72982e3c2b3dd36a70ec4a3e32f96b7278717ef2 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Sun, 9 Nov 2025 16:31:11 +0200
Subject: [PATCH] Kernel/LibC: Take fcntl extra field as uintptr_t

This allows passing pointers to fcntl
---
 kernel/include/kernel/OpenFileDescriptorSet.h | 2 +-
 kernel/include/kernel/Process.h               | 2 +-
 kernel/kernel/OpenFileDescriptorSet.cpp       | 2 +-
 kernel/kernel/Process.cpp                     | 2 +-
 userspace/libraries/LibC/fcntl.cpp            | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/include/kernel/OpenFileDescriptorSet.h b/kernel/include/kernel/OpenFileDescriptorSet.h
index 791b0b89..ae990354 100644
--- a/kernel/include/kernel/OpenFileDescriptorSet.h
+++ b/kernel/include/kernel/OpenFileDescriptorSet.h
@@ -33,7 +33,7 @@ namespace Kernel
 
 		BAN::ErrorOr<int> dup2(int, int);
 
-		BAN::ErrorOr<int> fcntl(int fd, int cmd, int extra);
+		BAN::ErrorOr<int> fcntl(int fd, int cmd, uintptr_t extra);
 
 		BAN::ErrorOr<off_t> seek(int fd, off_t offset, int whence);
 		BAN::ErrorOr<off_t> tell(int) const;
diff --git a/kernel/include/kernel/Process.h b/kernel/include/kernel/Process.h
index 10a1cdcc..67f9a289 100644
--- a/kernel/include/kernel/Process.h
+++ b/kernel/include/kernel/Process.h
@@ -149,7 +149,7 @@ namespace Kernel
 		BAN::ErrorOr<long> sys_pipe(int fildes[2]);
 		BAN::ErrorOr<long> sys_dup2(int fildes, int fildes2);
 
-		BAN::ErrorOr<long> sys_fcntl(int fildes, int cmd, int extra);
+		BAN::ErrorOr<long> sys_fcntl(int fildes, int cmd, uintptr_t extra);
 
 		BAN::ErrorOr<long> sys_seek(int fd, off_t offset, int whence);
 		BAN::ErrorOr<long> sys_tell(int fd);
diff --git a/kernel/kernel/OpenFileDescriptorSet.cpp b/kernel/kernel/OpenFileDescriptorSet.cpp
index 4bb03f8a..95eadb3c 100644
--- a/kernel/kernel/OpenFileDescriptorSet.cpp
+++ b/kernel/kernel/OpenFileDescriptorSet.cpp
@@ -217,7 +217,7 @@ namespace Kernel
 		return fildes;
 	}
 
-	BAN::ErrorOr<int> OpenFileDescriptorSet::fcntl(int fd, int cmd, int extra)
+	BAN::ErrorOr<int> OpenFileDescriptorSet::fcntl(int fd, int cmd, uintptr_t extra)
 	{
 		LockGuard _(m_mutex);
 
diff --git a/kernel/kernel/Process.cpp b/kernel/kernel/Process.cpp
index 15adc08d..8402bba3 100644
--- a/kernel/kernel/Process.cpp
+++ b/kernel/kernel/Process.cpp
@@ -1997,7 +1997,7 @@ namespace Kernel
 		return TRY(m_open_file_descriptors.dup2(fildes, fildes2));
 	}
 
-	BAN::ErrorOr<long> Process::sys_fcntl(int fildes, int cmd, int extra)
+	BAN::ErrorOr<long> Process::sys_fcntl(int fildes, int cmd, uintptr_t extra)
 	{
 		return TRY(m_open_file_descriptors.fcntl(fildes, cmd, extra));
 	}
diff --git a/userspace/libraries/LibC/fcntl.cpp b/userspace/libraries/LibC/fcntl.cpp
index 49045e82..055a0451 100644
--- a/userspace/libraries/LibC/fcntl.cpp
+++ b/userspace/libraries/LibC/fcntl.cpp
@@ -40,7 +40,7 @@ int fcntl(int fildes, int cmd, ...)
 
 	va_list args;
 	va_start(args, cmd);
-	int extra = va_arg(args, int);
+	uintptr_t extra = va_arg(args, uintptr_t);
 	va_end(args);
 
 	return syscall(SYS_FCNTL, fildes, cmd, extra);