From f27823babeb785e58c3841bb92cc7960f67463e4 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Tue, 5 Aug 2025 02:44:45 +0300
Subject: [PATCH] Kernel: Move stacks to the top of userspace address space

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

diff --git a/kernel/kernel/Thread.cpp b/kernel/kernel/Thread.cpp
index 52db624d..2986bf92 100644
--- a/kernel/kernel/Thread.cpp
+++ b/kernel/kernel/Thread.cpp
@@ -119,9 +119,15 @@ namespace Kernel
 
 		thread->m_is_userspace = true;
 
+#if ARCH(x86_64)
+		static constexpr vaddr_t stack_addr_start = 0x0000700000000000;
+#elif ARCH(i686)
+		static constexpr vaddr_t stack_addr_start = 0xB0000000;
+#endif
+
 		thread->m_kernel_stack = TRY(VirtualRange::create_to_vaddr_range(
 			page_table,
-			0x200000, USERSPACE_END,
+			stack_addr_start, USERSPACE_END,
 			kernel_stack_size,
 			PageTable::Flags::ReadWrite | PageTable::Flags::Present,
 			true, true
@@ -129,7 +135,7 @@ namespace Kernel
 
 		thread->m_userspace_stack = TRY(VirtualRange::create_to_vaddr_range(
 			page_table,
-			0x200000, USERSPACE_END,
+			stack_addr_start, USERSPACE_END,
 			userspace_stack_size,
 			PageTable::Flags::UserSupervisor | PageTable::Flags::ReadWrite | PageTable::Flags::Present,
 			true, true