Re: [PATCH v2 1/1] Check linker for --image-base support - Christian Hesse via Grub-devel

From: Christian Hesse via Grub-devel <grub-devel@gnu.org>
To: Nicholas Vinson <nvinson234@gmail.com>
Cc: Christian Hesse <list@eworm.de>,
	The development of GNU GRUB <grub-devel@gnu.org>,
	cpfeiffer@rev-crew.info
Subject: Re: [PATCH v2 1/1] Check linker for --image-base support
Date: Mon, 1 Dec 2025 16:02:47 +0100	[thread overview]
Message-ID: <20251201160247.6a1cebed@leda.eworm.net> (raw)
In-Reply-To: <cfd9b0f95bfcc91fb4e27059b2768468948068a1.1763512485.git.nvinson234@gmail.com>

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Nicholas Vinson <nvinson234@gmail.com> on Tue, 2025/11/18 19:38:
> In several scenarios, configure tests assume it's safe to use
> '-Wl,-Ttext,<address>', but starting with ld.lld-21, blindly using that
> flag may result in configure-test failures due to ld.lld failing to
> link. The failure is because ld.lld-21 no longer allows the specified
> address is less than the base address.
> 
> However, ld.lld-21+ and ld.bfd-2.44+ both provide support for the
> --image-base flag making it preferable over the older `-Ttext` flag.

This breaks the start address in i386-pc/kernel.img, which should be 0x9000,
but became 0x9074.

The error message is:

/usr/bin/grub-install: error: `/usr/lib/grub/i386-pc/kernel.img' is
miscompiled: its start address is 0x9074 instead of 0x9000: ld.gold bug?.
-- 
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Best regards             my address:    */=0;b=c[a++];)
putchar(b-1/(/*    Chris            cc -ox -xc - && ./x    */b/42*2-3)*42);}

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