Re: [PATCH 5.4 v3 1/6] x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS

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On Wed, Mar 01, 2023 at 07:06:59PM -0700, Tom Saeger wrote:
> From: "H.J. Lu" <hjl.tools@xxxxxxxxx>
> 
> commit 84d5f77fc2ee4e010c2c037750e32f06e55224b0 upstream.
> 
> In the x86 kernel, .exit.text and .exit.data sections are discarded at
> runtime, not by the linker. Add RUNTIME_DISCARD_EXIT to generic DISCARDS
> and define it in the x86 kernel linker script to keep them.
> 
> The sections are added before the DISCARD directive so document here
> only the situation explicitly as this change doesn't have any effect on
> the generated kernel. Also, other architectures like ARM64 will use it
> too so generalize the approach with the RUNTIME_DISCARD_EXIT define.
> 
>  [ bp: Massage and extend commit message. ]
> 
> Signed-off-by: H.J. Lu <hjl.tools@xxxxxxxxx>
> Signed-off-by: Borislav Petkov <bp@xxxxxxx>
> Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
> Link: https://lkml.kernel.org/r/20200326193021.255002-1-hjl.tools@xxxxxxxxx
> Signed-off-by: Tom Saeger <tom.saeger@xxxxxxxxxx>

The encoding of this email was very odd, with dos line-ends?  Something
was odd on your side, all the others were fine.  I've fixed it up...

strange,

greg k-h



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