From 9727eaf1e03f031af3e0ad37b2335bd95821d6bb Mon Sep 17 00:00:00 2001
From: wborgeaud <williamborgeaud@gmail.com>
Date: Wed, 24 May 2023 15:03:02 +0200
Subject: [PATCH] Fix extcodehash when account is empty (#1055)

---
 evm/src/cpu/kernel/asm/account_code.asm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/evm/src/cpu/kernel/asm/account_code.asm b/evm/src/cpu/kernel/asm/account_code.asm
index d82980db..d7d09b5b 100644
--- a/evm/src/cpu/kernel/asm/account_code.asm
+++ b/evm/src/cpu/kernel/asm/account_code.asm
@@ -13,10 +13,14 @@ global sys_extcodehash:
     // stack: kexit_info, address
 
     SWAP1
+    DUP1 %is_dead %jumpi(extcodehash_dead)
     %extcodehash
     // stack: hash, kexit_info
     SWAP1
     EXIT_KERNEL
+extcodehash_dead:
+    %stack (address, kexit_info) -> (kexit_info, 0)
+    EXIT_KERNEL
 
 global extcodehash:
     // stack: address, retdest