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authorEric W. Biederman <ebiederm@xmission.com>2021-05-03 01:28:31 +0300
committerEric W. Biederman <ebiederm@xmission.com>2021-05-19 00:20:54 +0300
commit0683b53197b55343a166f1507086823030809a19 (patch)
tree19e83bcb655352a82cad92ec948df125d67737b1 /include/uapi/asm-generic/siginfo.h
parentaf5eeab7e8e8c2f0fad10e4ab8cc8092012a2d5b (diff)
downloadlinux-0683b53197b55343a166f1507086823030809a19.tar.xz
signal: Deliver all of the siginfo perf data in _perf
Don't abuse si_errno and deliver all of the perf data in _perf member of siginfo_t. Note: The data field in the perf data structures in a u64 to allow a pointer to be encoded without needed to implement a 32bit and 64bit version of the same structure. There already exists a 32bit and 64bit versions siginfo_t, and the 32bit version can not include a 64bit member as it only has 32bit alignment. So unsigned long is used in siginfo_t instead of a u64 as unsigned long can encode a pointer on all architectures linux supports. v1: https://lkml.kernel.org/r/m11rarqqx2.fsf_-_@fess.ebiederm.org v2: https://lkml.kernel.org/r/20210503203814.25487-10-ebiederm@xmission.com v3: https://lkml.kernel.org/r/20210505141101.11519-11-ebiederm@xmission.com Link: https://lkml.kernel.org/r/20210517195748.8880-4-ebiederm@xmission.com Reviewed-by: Marco Elver <elver@google.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'include/uapi/asm-generic/siginfo.h')
-rw-r--r--include/uapi/asm-generic/siginfo.h8
1 files changed, 6 insertions, 2 deletions
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index e663bf117b46..5a3c221f4c9d 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -91,7 +91,10 @@ union __sifields {
__u32 _pkey;
} _addr_pkey;
/* used when si_code=TRAP_PERF */
- unsigned long _perf;
+ struct {
+ unsigned long _data;
+ __u32 _type;
+ } _perf;
};
} _sigfault;
@@ -154,7 +157,8 @@ typedef struct siginfo {
#define si_lower _sifields._sigfault._addr_bnd._lower
#define si_upper _sifields._sigfault._addr_bnd._upper
#define si_pkey _sifields._sigfault._addr_pkey._pkey
-#define si_perf _sifields._sigfault._perf
+#define si_perf_data _sifields._sigfault._perf._data
+#define si_perf_type _sifields._sigfault._perf._type
#define si_band _sifields._sigpoll._band
#define si_fd _sifields._sigpoll._fd
#define si_call_addr _sifields._sigsys._call_addr