linux-kernel - Re: [PATCH v4 03/36] arm64/gcs: Document the ABI for Guarded Control Stacks

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Message-ID: <8a158486-f0b9-4f25-b673-998726a40528@sirena.org.uk>
Date:   Thu, 19 Oct 2023 18:08:12 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Szabolcs Nagy <Szabolcs.Nagy@....com>,
        Will Deacon <will@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Marc Zyngier <maz@...nel.org>,
        Oliver Upton <oliver.upton@...ux.dev>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Arnd Bergmann <arnd@...db.de>, Oleg Nesterov <oleg@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>,
        Shuah Khan <shuah@...nel.org>,
        "Rick P. Edgecombe" <rick.p.edgecombe@...el.com>,
        Deepak Gupta <debug@...osinc.com>,
        Ard Biesheuvel <ardb@...nel.org>,
        "H.J. Lu" <hjl.tools@...il.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
        kvmarm@...ts.linux.dev, linux-fsdevel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-mm@...ck.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v4 03/36] arm64/gcs: Document the ABI for Guarded Control
 Stacks

On Thu, Oct 05, 2023 at 06:23:10PM +0100, Catalin Marinas wrote:

> I haven't checked how many clone() or clone3() uses outside the libc are
> (I tried some quick search in Debian but did not dig into the specifics
> to see how generic that code is). I agree that having to change valid
> cases outside of libc is not ideal. Even if we have the same clone3()
> interface for x86 and arm64, we'd have other architectures that need
> #ifdef'ing.

FTR the set of Debian source packages that have references to the string
__NR_clone (which picks up clone3 too) is below.  At least some (eg,
kore) just have things that look like a copy of the syscall table rather
than things that look like calls, though equally it's likely we're
missing some.

aflplusplus
android-platform-tools
binutils-avr
box64
brltty
bubblewrap
chromium
chrony
crash
criu
crun
dietlibc
elogind
emscripten
fakeroot-ng
falcosecurity-libs
firefox
firefox-esr
flatpak
gcc-9
gcc-10
gcc-11
gcc-12
gcc-13
gcc-arm-none-eabi
gcc-snapshot
gdb-msp430
glibc
gnumach
hurd
klibc
kore
libpod
libseccomp
linux
llvm-toolchain-14
llvm-toolchain-15
llvm-toolchain-16
lxc
lxcfs
lxd
musl
newlib
notcurses
purelibc
pwntools
qemu
qt6-base
qt6-webengine
qtbase-opensource-src
qtbase-opensource-src-gles
qtwebengine-opensource-src
radare2
rumur
rustc
rust-linux-raw-sys
rust-rustix
strace
stress-ng
swtpm
systemd
systemtap
termpaint
thunderbird
tor
uclibc
umview
valgrind
vsftpd
wasi-libc
webkit2gtk
wpewebkit

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