vmlinux.lds.h: allow arch specific handling of ro_after_init data section

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commit c74ba8b348 ("arch: Introduce post-init read-only memory")
introduced the __ro_after_init attribute which allows to add variables
to the ro_after_init data section.

This new section was added to rodata, even though it contains writable
data. This in turn causes problems on architectures which mark the
page table entries read-only that point to rodata very early.

This patch allows architectures to implement an own handling of the
.data..ro_after_init section.
Usually that would be:
- mark the rodata section read-only very early
- mark the ro_after_init section read-only within mark_rodata_ro

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

...

This commit is contained in:

Heiko Carstens 2016-06-07 12:20:51 +02:00 • committed by Martin Schwidefsky

parent 64f31d5802

commit 32fb2fc5c3

1 changed files with 9 additions and 1 deletions

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include/asm-generic/vmlinux.lds.h

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