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From: "dave.anglin at bell dot net" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug libc/29165] [Regression] broken argv adjustment
Date: Wed, 25 May 2022 13:02:12 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29165

--- Comment #6 from dave.anglin at bell dot net ---
It looks to me as if _dl_start doesn't call the user entrypoint directly.=
=C2=A0 It
calls _start in start.S. _start
calls __libc_start_main with the argument setup shown in the comment in
sysdeps/hppa/start.S.

On 2022-05-25 8:41 a.m., adhemerval.zanella at linaro dot org wrote:
> https://sourceware.org/bugzilla/show_bug.cgi?id=3D29165
>
> --- Comment #5 from Adhemerval Zanella <adhemerval.zanella at linaro dot =
org> ---
> But the start above will tail call _dl_start and _dl_start will call the =
user
> entrypoint that will eventually calls exit syscall.  So I can't see why m=
atter
> restore r24 and r25 at this point, specially since they will point to the=
 ld.so
> ones.
>
> (In reply to dave.anglin from comment #4)
>> But the comment says these are for (_start) in start.S.
>>
>> On 2022-05-25 7:57 a.m., adhemerval.zanella at linaro dot org wrote:
>>> I don't think it is required since _dl_fini does not have any arguments.
>>>
>>> (In reply to dave.anglin from comment #2)
>>>> Thanks.=C2=A0 I think we need to keep the instructions that save and r=
estore r24
>>>> and r25.
>>>> They will be clobbered by call to _dl_init.
>>>>
>>>> Will test.

--=20
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