Re: [PATCH v4.1 06/10] x86/entry/vdso32: remove open-coded DWARF in sigreturn.S

"H. Peter Anvin" <[email protected]> Mon, 9 Feb 2026 21:24:00 -0800

Newsgroups	org.kernel.vger.linux-sgx,org.kernel.vger.linux-kernel,org.kvack.linux-mm
Message-ID	<[email protected]>

On 2026-02-09 20:56, Xi Ruoyao wrote:
>>
>> Well, it looks like this might be a non-manifest bug on x86 *IN THIS CASE*,
> 
> But only if after the patch _Unwind_Find_FDE returns NULL here (instead
> of a FDE of another function).  I've not verified it on x86.  If glibc
> tests (specifically misc/tst-sigcontext-get_pc) work fine things should
> be fine.
> 

The x86 vdso should be fine because of the alignment padding, but we should
probably add an explicit pad before just in case.

What a mess.

	-hpa