SPDX-FileCopyrightText: 2020 Rich Felker <dalias@aerifal.cx>

SPDX-License-Identifier: MIT

From 0b0640219338b80cf47026d1970b5503414ed7f3 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Sun, 30 Aug 2020 21:37:12 -0400
Subject: fix i386 __set_thread_area fallback

this code is only needed for pre-2.6 kernels, which are not actually
supported anyway, and was never tested. the fallback path using
SYS_modify_ldt failed to clear the upper bits of %eax (all ones due to
SYS_set_thread_area's return value being an error) before modifying
%al to attempt a new syscall.
---
 src/thread/i386/__set_thread_area.s | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/thread/i386/__set_thread_area.s')

diff --git src/thread/i386/__set_thread_area.s src/thread/i386/__set_thread_area.s
index c2c21dd5..aa6852be 100644
--- musl-1.1.24/src/thread/i386/__set_thread_area.s
+++ musl-1.1.24/src/thread/i386/__set_thread_area.s
@@ -28,6 +28,7 @@ __set_thread_area:
 	ret
 2:
 	mov %ebx,%ecx
+	xor %eax,%eax
 	xor %ebx,%ebx
 	xor %edx,%edx
 	mov %ebx,(%esp)
-- 
cgit v1.2.1

