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authorEric W. Biederman <ebiederm@xmission.com>2021-05-02 14:27:24 -0500
committerEric W. Biederman <ebiederm@xmission.com>2021-05-18 16:20:54 -0500
commitaf5eeab7e8e8c2f0fad10e4ab8cc8092012a2d5b (patch)
tree9e9cf468010ea32dcf474dea62e2d8a7ce8f5d23 /kernel/signal.c
parent9abcabe3111811aeae0f3a14e159b14248631875 (diff)
signal: Factor force_sig_perf out of perf_sigtrap
Separate filling in siginfo for TRAP_PERF from deciding that siginal needs to be sent. There are enough little details that need to be correct when properly filling in siginfo_t that it is easy to make mistakes if filling in the siginfo_t is in the same function with other logic. So factor out force_sig_perf to reduce the cognative load of on reviewers, maintainers and implementors. v1: https://lkml.kernel.org/r/m17dkjqqxz.fsf_-_@fess.ebiederm.org v2: https://lkml.kernel.org/r/20210505141101.11519-10-ebiederm@xmission.com Link: https://lkml.kernel.org/r/20210517195748.8880-3-ebiederm@xmission.com Reviewed-by: Marco Elver <elver@google.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/signal.c')
-rw-r--r--kernel/signal.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 597594ee72de..3a18d13c39b2 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1763,6 +1763,19 @@ int force_sig_pkuerr(void __user *addr, u32 pkey)
}
#endif
+int force_sig_perf(void __user *addr, u32 type, u64 sig_data)
+{
+ struct kernel_siginfo info;
+
+ clear_siginfo(&info);
+ info.si_signo = SIGTRAP;
+ info.si_errno = type;
+ info.si_code = TRAP_PERF;
+ info.si_addr = addr;
+ info.si_perf = sig_data;
+ return force_sig_info(&info);
+}
+
/* For the crazy architectures that include trap information in
* the errno field, instead of an actual errno value.
*/

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