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From: Florian Weimer <fweimer@redhat.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: "H.J. Lu via Libc-alpha" <libc-alpha@sourceware.org>
Subject: Re: [PATCH] x32: Add <asm/unistd_x32.h> and regenerate arch-syscall.h
References: <20200815213138.1375595-1-hjl.tools@gmail.com>
 <87v9h8e1it.fsf@oldenburg2.str.redhat.com>
 <CAMe9rOpSGuO1DMyfJOxDvQNn36o5txQBzp6U3T5NrK=XiBx=nA@mail.gmail.com>
Date: Mon, 24 Aug 2020 15:22:56 +0200
In-Reply-To: <CAMe9rOpSGuO1DMyfJOxDvQNn36o5txQBzp6U3T5NrK=XiBx=nA@mail.gmail.com>
 (H. J. Lu's message of "Mon, 24 Aug 2020 05:42:27 -0700")
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* H. J. Lu:

> It doesn't work in this case.  <fixup-asm-unistd.h> is used to undefine o=
r
> redefine a syscall from <asm/unistd.h>.   The actual syscall numbers stil=
l
> come from <asm/unistd.h>.  In this case, the sycall number is missing fro=
m
> <asm/unistd_x32.h>.   My patch is a prerequisite for a new testcase:
>
> ../sysdeps/unix/sysv/linux/x86/tst-sigreturn-1.c: In function =E2=80=98se=
tup_ldt=E2=80=99:
> ../sysdeps/unix/sysv/linux/x86/tst-sigreturn-1.c:258:14: error:
> =E2=80=98SYS_set_thread_area=E2=80=99 undeclared (first use in this funct=
ion)
>   258 |  if (syscall(SYS_set_thread_area, &gdt_data16_desc) =3D=3D 0) {
>       |              ^~~~~~~~~~~~~~~~~~~

Can you make it an internal test and use __NR_set_thread_area?

Thanks,
Florian