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Message-ID: <7cfc5adb-64e8-7259-4c7e-26bb832cd00a@syrmia.com>
Date: Tue, 16 Nov 2021 15:40:00 +0100
From: Dragan Mladjenovic <Dragan.Mladjenovic@...mia.com>
To: Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>, gcc-patches@....gnu.org,
Jeff Law <jeffreyalaw@...il.com>, musl@...ts.openwall.com
Subject: Re: [PATCH v2] configure: define TARGET_LIBC_GNUSTACK on musl
Hi,
Looks fine to me. If possible, maybe it should even be back-ported to
stable branches.
Not sure if MIPS assembly sources (if any) in musl would need explicit
.note.GNU-stack
to complement this?
Best regards,
Dragan
On 16-Nov-21 06:13, Ilya Lipnitskiy wrote:
> musl only uses PT_GNU_STACK to set default thread stack size and has no
> executable stack support[0], so there is no reason not to emit the
> .note.GNU-stack section on musl builds.
>
> [0]: https://lore.kernel.org/all/20190423192534.GN23599@brightrain.aerifal.cx/T/#u
>
> gcc/ChangeLog:
>
> * configure: Regenerate.
> * configure.ac: define TARGET_LIBC_GNUSTACK on musl
>
> Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@...il.com>
> ---
> gcc/configure | 3 +++
> gcc/configure.ac | 3 +++
> 2 files changed, 6 insertions(+)
>
> diff --git a/gcc/configure b/gcc/configure
> index 74b9d9be4c85..7091a838aefa 100755
> --- a/gcc/configure
> +++ b/gcc/configure
> @@ -31275,6 +31275,9 @@ fi
> # Check if the target LIBC handles PT_GNU_STACK.
> gcc_cv_libc_gnustack=unknown
> case "$target" in
> + mips*-*-linux-musl*)
> + gcc_cv_libc_gnustack=yes
> + ;;
> mips*-*-linux*)
>
> if test $glibc_version_major -gt 2 \
> diff --git a/gcc/configure.ac b/gcc/configure.ac
> index c9ee1fb8919e..8a2d34179a75 100644
> --- a/gcc/configure.ac
> +++ b/gcc/configure.ac
> @@ -6961,6 +6961,9 @@ fi
> # Check if the target LIBC handles PT_GNU_STACK.
> gcc_cv_libc_gnustack=unknown
> case "$target" in
> + mips*-*-linux-musl*)
> + gcc_cv_libc_gnustack=yes
> + ;;
> mips*-*-linux*)
> GCC_GLIBC_VERSION_GTE_IFELSE([2], [31], [gcc_cv_libc_gnustack=yes], )
> ;;
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