[core/loader] Implement a bit improper ASLR (#2945)

A bit improper of an ASLR - it does something but something good? Who knows...
All I know is that there is a non-uniform distrobution for rand() and that rng_seed is likely a better solution?
I don't know

Signed-off-by: lizzie lizzie@eden-emu.dev

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2945
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

1 files changed, 9 insertions, 2 deletions

diff --git a/src/core/loader/nro.cpp b/src/core/loader/nro.cpp
index 1d96dc4c89..a3cfa31be7 100644
--- a/src/core/loader/nro.cpp
+++ b/src/core/loader/nro.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -237,10 +240,14 @@ static bool LoadNroImpl(Core::System& system, Kernel::KProcess& process,
         return 0;
     }();
 
+    // TODO: this is bad form of ASLR, it sucks
+    size_t aslr_offset = ((::Settings::values.rng_seed_enabled.GetValue()
+        ? ::Settings::values.rng_seed.GetValue()
+        : std::rand()) * 0x734287f27) & 0xfff000;
+
     // Setup the process code layout
     if (process
-            .LoadFromMetadata(FileSys::ProgramMetadata::GetDefault(), image_size, fastmem_base,
-                              false)
+            .LoadFromMetadata(FileSys::ProgramMetadata::GetDefault(), image_size, fastmem_base, aslr_offset, false)
             .IsError()) {
         return false;
     }