https://sourceware.org/bugzilla/show_bug.cgi?id=30143
Nick Clifton <nickc at redhat dot com> changed:
What |Removed |Added
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CC| |nickc at redhat dot com
--- Comment #1 from Nick Clifton <nickc at redhat dot com> ---
Hi Pali,
OK, so I am assuming that the desired behaviour is specific to the NT kernel.
Ie, the default of allowing all sections to be paged is correct for most PE
binaries, just not the kernel ?
Given that, there needs to be some way to distinguish between building a
kernel
and building a normal binary and the most obvious way is to have a custom
linker script for the kernel. This script can set the
IMAGE_SCN_MEM_NOT_PAGED
flag for all sections except one called "PAGE". Do you agree ?
So what we need is a way to set PE specific section flags in linker scripts.
(Which goes against what I said for PR 30145, but I am going through these
PRs in reverse order and I now see that there is a genuine need to extend
the linker script syntax).
The linker currently supports setting a section's type via the "TYPE=xxx"
syntax, but that is not quite what we need, since presumably there might
be a need to set more than one flag. So I guess that we need to add a
"FLAG=xxx[|xxx]+" syntax. Then, since the flags are going to be file
format/architecture specific, we need to implement a callback into the
linker's emulation framework in order to parse the flags, and another one
to set them. Plus we need to add support for the NOT_PAGED flag to the
BFD library (since it currently does not support it at all). *sigh* I
was right about this being a big potential source for new bugs.
It would be a lot easier to just use objcopy to set the flag after the
the link has completed...
Any thoughts ?
Cheers
Nick
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