32 lines
968 B
Diff
32 lines
968 B
Diff
From 0b0640219338b80cf47026d1970b5503414ed7f3 Mon Sep 17 00:00:00 2001
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From: Rich Felker <dalias@aerifal.cx>
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Date: Sun, 30 Aug 2020 21:37:12 -0400
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Subject: fix i386 __set_thread_area fallback
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this code is only needed for pre-2.6 kernels, which are not actually
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supported anyway, and was never tested. the fallback path using
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SYS_modify_ldt failed to clear the upper bits of %eax (all ones due to
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SYS_set_thread_area's return value being an error) before modifying
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%al to attempt a new syscall.
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---
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src/thread/i386/__set_thread_area.s | 1 +
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1 file changed, 1 insertion(+)
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(limited to 'src/thread/i386/__set_thread_area.s')
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diff --git src/thread/i386/__set_thread_area.s src/thread/i386/__set_thread_area.s
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index c2c21dd5..aa6852be 100644
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--- src/thread/i386/__set_thread_area.s
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+++ src/thread/i386/__set_thread_area.s
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@@ -28,6 +28,7 @@ __set_thread_area:
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ret
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2:
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mov %ebx,%ecx
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+ xor %eax,%eax
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xor %ebx,%ebx
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xor %edx,%edx
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mov %ebx,(%esp)
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--
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cgit v1.2.1
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