From 6cd57633613092b55b109d68319ead589d07410a Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Thu, 14 Dec 2023 10:54:06 +0200
Subject: [PATCH] Kernel: Allow cloning of mmapped framebuffer regions

---
 kernel/kernel/Device/FramebufferDevice.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/kernel/kernel/Device/FramebufferDevice.cpp b/kernel/kernel/Device/FramebufferDevice.cpp
index c2ae7e8803..63c4bb533a 100644
--- a/kernel/kernel/Device/FramebufferDevice.cpp
+++ b/kernel/kernel/Device/FramebufferDevice.cpp
@@ -233,8 +233,14 @@ namespace Kernel
 
 		virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> clone(PageTable& new_page_table) override
 		{
-			(void)new_page_table;
-			return BAN::Error::from_errno(ENOTSUP);
+			auto* region_ptr = new FramebufferMemoryRegion(new_page_table, m_size, m_type, m_flags, m_framebuffer);
+			if (region_ptr == nullptr)
+				return BAN::Error::from_errno(ENOMEM);
+			auto region = BAN::UniqPtr<FramebufferMemoryRegion>::adopt(region_ptr);
+
+			TRY(region->initialize({ m_vaddr, m_vaddr + BAN::Math::div_round_up(m_size, PAGE_SIZE) * PAGE_SIZE }));
+
+			return BAN::UniqPtr<MemoryRegion>(BAN::move(region));
 		}
 
 	protected: