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authorRich Felker <dalias@aerifal.cx>2020-08-30 21:37:12 -0400
committerRich Felker <dalias@aerifal.cx>2020-08-30 21:37:12 -0400
commit0b0640219338b80cf47026d1970b5503414ed7f3 (patch)
treea5abc13e40bcd817f2e280b7efe038ee5d1fd5b1 /src
parentcf27184d00c1588eccac71a3bc89c9798e60bbd9 (diff)
downloadmusl-0b0640219338b80cf47026d1970b5503414ed7f3.tar.gz
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.
Diffstat (limited to 'src')
-rw-r--r--src/thread/i386/__set_thread_area.s1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/thread/i386/__set_thread_area.s b/src/thread/i386/__set_thread_area.s
index c2c21dd5..aa6852be 100644
--- a/src/thread/i386/__set_thread_area.s
+++ b/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)