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| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-12-10 14:23:49 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2022-05-01 19:51:21 -0700 |
| commit | a8f0c31fa87dcf9154c4209960f1dd1ed6a1aad8 (patch) | |
| tree | d32478a51694a14cbd5c80e6768ea0869647aa88 /tools/objtool | |
| parent | 270a8306917e40746a02494abbd40828356b08e1 (diff) | |
| download | linux-a8f0c31fa87dcf9154c4209960f1dd1ed6a1aad8.tar.gz linux-a8f0c31fa87dcf9154c4209960f1dd1ed6a1aad8.tar.bz2 linux-a8f0c31fa87dcf9154c4209960f1dd1ed6a1aad8.zip | |
xtensa: noMMU: allow handling protection faults
Many xtensa CPU cores without full MMU still have memory protection
features capable of raising exceptions for invalid instruction
fetches/data access. Allow handling such exceptions. This improves
behavior of processes that pass invalid memory pointers to syscalls in
noMMU configs: in case of exception the kernel instead of killing the
process is now able to return -EINVAL from a syscall.
Introduce CONFIG_PFAULT that controls whether protection fault code is
enabled and register handlers for common memory protection exceptions
when it is enabled.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'tools/objtool')
0 files changed, 0 insertions, 0 deletions