From 5e376ab1287be429c021907fa719ce42173b1df2 Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.org>
Date: Mon, 24 Jun 2024 01:28:04 -0500
Subject: arch: i386: boot: zero ESP before calling i386_entry

Set the ESP register to NULL before calling any C code. This allows a
stack trace to occur without overrunning the initial bootstrap stack.

Signed-off-by: Danny Holman <dholman@gymli.org>
---
 arch/i386/boot/boot.s | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/i386/boot')

diff --git a/arch/i386/boot/boot.s b/arch/i386/boot/boot.s
index f861699..5357910 100644
--- a/arch/i386/boot/boot.s
+++ b/arch/i386/boot/boot.s
@@ -80,6 +80,7 @@ _start:
 
         call setup_stack_guard
 
+        xorl %ebp, %ebp
         pushl %ebx
         pushl %eax
         call i386_entry
-- 
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