re: CVS commit: src/sys/arch

[matthew green <mrg%eterna.com.au@localhost>]

"Maxime Villard" writes:
> Module Name:	src
> Committed By:	maxv
> Date:		Fri Aug 18 10:28:53 UTC 2017
> 
> Modified Files:
> 	src/sys/arch/amd64/conf: kern.ldscript
> 	src/sys/arch/i386/conf: kern.ldscript kern.ldscript.4MB
> 
> Log Message:
> Fill the .text padding with 0xcc (int3), in such a way that any jump into
> this area will automatically fault. The alignment within the section is
> necessary, in order to fill strictly all of the padding (took me a while
> to figure this out); but it does not change the kernel size.
> 
> Greatly inspired from FreeBSD, but for some reason they decided not to
> apply the alignment.

it's really a pity that we have almost _2MB_ of basically wasted
space in the kernel.  there's really no good reason for it.  it's
not as if ELF files are incapable of expressing discontiguous
sections separately without zero or other filling.  the int3
filling could be done at run time.

you didn't introduce this issue, but you did add 1MB of wastage
a while back now.  can you please look at fixing this?  it both
slows boot and fills my boot disk/partition.

thanks.


.mrg.