linux-kernel - Re: odd endianness toolchains for crosstool

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Message-ID: <YmbYeGNhNKdMgidP@zx2c4.com>
Date:   Mon, 25 Apr 2022 19:20:56 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: odd endianness toolchains for crosstool

On Mon, Apr 25, 2022 at 07:01:57PM +0200, Jason A. Donenfeld wrote:
> For ppc32? I'm unable to produce working executables with the toolchain.
> And looking at the target info, -msecure-plt is missing, while
> -mlong-double-64 is there:
> 
> $ ./powerpc-linux-gcc -Q --help=target | grep long-double
>   -mlong-double-                        64
> $ ./powerpc-linux-gcc -Q --help=target | grep msecure-plt
>   -msecure-plt                          [disabled]

And looking at the actual sections of the binary, indeed the .plt
section is RWX, which means it's not getting -msecure-plt as it should.