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bpf: add support to read sample address in bpf program

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This commit adds new field "addr" to bpf_perf_event_data which could be
read and used by bpf programs attached to perf events. The value of the
field is copied from bpf_perf_event_data_kern.addr and contains the
address value recorded by specifying sample_type with PERF_SAMPLE_ADDR
when calling perf_event_open.

Signed-off-by: Teng Qin <qinteng@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Teng Qin
2018-03-06 10:55:01 -08:00
committed by Daniel Borkmann
parent a366e300ae
commit 95da0cdb72
2 changed files with 17 additions and 4 deletions
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include/uapi/linux/bpf_perf_event.h
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@@ -13,6 +13,7 @@
struct bpf_perf_event_data {
bpf_user_pt_regs_t regs;
__u64 sample_period;
__u64 addr;
};
#endif /* _UAPI__LINUX_BPF_PERF_EVENT_H__ */