Zero out RBP in order not to compromise the environment encryption.

solana-labs · Sep 27, 2024 · 26e632d · 26e632d
1 parent aed294f
commit 26e632d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/jit.rs b/src/jit.rs
@@ -109,6 +109,8 @@ impl JitProgram {
         unsafe {
             std::arch::asm!(
                 // RBP is saved and restored automatically by the surrounding function.
+                // It is zeroed out in order not to compromise the runtime environment (RDI) encryption.
+                "xor rbp, rbp",
                 // RBX must be saved and restored manually in the current version of rustc and llvm.
                 "push rbx",
                 "mov [{host_stack_pointer}], rsp",