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| author | Al Viro <viro@zeniv.linux.org.uk> | 2022-08-08 17:09:45 +0200 |
|---|---|---|
| committer | Dinh Nguyen <dinguyen@kernel.org> | 2022-08-15 18:25:32 +0200 |
| commit | fd0c153daad135d0ec1a53c5dbe6936a724d6ae1 (patch) | |
| tree | 1b0b0486639eba2a2233205735ba09681a8864e0 /kernel/kcsan/permissive.h | |
| parent | nios2: restarts apply only to the first sigframe we build... (diff) | |
| download | linux-fd0c153daad135d0ec1a53c5dbe6936a724d6ae1.tar.xz linux-fd0c153daad135d0ec1a53c5dbe6936a724d6ae1.zip | |
nios2: add force_successful_syscall_return()
If we use the ancient SysV syscall ABI, we'd better have tell the
kernel how to claim that a negative return value is a success.
Use ->orig_r2 for that - it's inaccessible via ptrace, so it's
a fair game for changes and it's normally[*] non-negative on return
from syscall. Set to -1; syscall is not going to be restart-worthy
by definition, so we won't interfere with that use either.
[*] the only exception is rt_sigreturn(), where we skip the entire
messing with r1/r2 anyway.
Fixes: 82ed08dd1b0e ("nios2: Exception handling")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Diffstat (limited to 'kernel/kcsan/permissive.h')
0 files changed, 0 insertions, 0 deletions