From 06af9f31878b233534e5412e5434878f63b54d1a Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Fri, 29 Sep 2023 02:05:12 +0300
Subject: [PATCH] LibELF: Optimize LoadableELF::clone() memory usage

We only clone mapped pages that have been marked as writeble.
Read/execute only pages will be exactly as in the file itself and
can be demand paged also :D
---
 LibELF/LibELF/LoadableELF.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/LibELF/LibELF/LoadableELF.cpp b/LibELF/LibELF/LoadableELF.cpp
index d25860bd..106c3142 100644
--- a/LibELF/LibELF/LoadableELF.cpp
+++ b/LibELF/LibELF/LoadableELF.cpp
@@ -252,6 +252,9 @@ namespace LibELF
 					break;
 				case PT_LOAD:
 				{
+					if (!(program_header.p_flags & LibELF::PF_W))
+						continue;
+
 					PageTable::flags_t flags = PageTable::Flags::UserSupervisor | PageTable::Flags::Present;
 					if (program_header.p_flags & LibELF::PF_W)
 						flags |= PageTable::Flags::ReadWrite;