From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org, Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: Re: [PATCH master] ARM64: efi-header: declare the code section writable
Date: Fri, 28 Aug 2026 16:23:59 +0200 [thread overview]
Message-ID: <178792703930.522043.10001836408925445051.b4-ty@pengutronix.de> (raw)
In-Reply-To: <20260825075248.1014060-1-a.fatoum@pengutronix.de>
On Tue, 25 Aug 2026 09:52:46 +0200, Ahmad Fatoum wrote:
> CONFIG_PBL_FULLY_PIC was initially introduced to make the enough of the
> early PBL position-independent, so it can execute until barebox is
> relocated to EFI allocated RWX memory.
> This was required because the EDK-II EFI firmware I tested against
> mapped the barebox code section read-only.
>
> While W^X is desirable, the current setup is broken: We do not check at
> compile-time that there are no relocations, so compiler updates and code
> changes can make this regress. Also the memory barebox allocates for
> itself is RWX as we do not ask for other types of memory via NX_COMPAT.
>
> [...]
Applied, thanks!
[1/1] ARM64: efi-header: declare the code section writable
https://git.pengutronix.de/cgit/barebox/commit/?id=42e510a258d7 (link may not be stable)
Best regards,
--
Sascha Hauer <s.hauer@pengutronix.de>
prev parent reply other threads:[~2026-08-28 14:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-25 7:52 Ahmad Fatoum
2026-08-28 14:23 ` Sascha Hauer [this message]
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