scs: Add support for stack usage debugging

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Implements CONFIG_DEBUG_STACK_USAGE for shadow stacks. When enabled,
also prints out the highest shadow stack usage per process.

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
[will: rewrote most of scs_check_usage()]
Signed-off-by: Will Deacon <will@kernel.org>

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Sami Tolvanen 2020-04-27 09:00:09 -07:00 • committed by Will Deacon

parent 628d06a48f

commit 5bbaf9d1fc

1 changed files with 29 additions and 1 deletions

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kernel/scs.c

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