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63841bc083
Currently, the kprobe BPF program attachment method for bpf_load is
quite old. The implementation of bpf_load "directly" controls and
manages(create, delete) the kprobe events of DEBUGFS. On the other hand,
using using the libbpf automatically manages the kprobe event.
(under bpf_link interface)
By calling bpf_program__attach(_kprobe) in libbpf, the corresponding
kprobe is created and the BPF program will be attached to this kprobe.
To remove this, by simply invoking bpf_link__destroy will clean up the
event.
This commit refactors kprobe tracing programs (tracex{1~7}_user.c) with
libbpf using bpf_link interface and bpf_program__attach.
tracex2_kern.c, which tracks system calls (sys_*), has been modified to
append prefix depending on architecture.
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200516040608.1377876-3-danieltimlee@gmail.com
14 lines
286 B
C
14 lines
286 B
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef __TRACE_COMMON_H
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#define __TRACE_COMMON_H
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#ifdef __x86_64__
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#define SYSCALL(SYS) "__x64_" __stringify(SYS)
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#elif defined(__s390x__)
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#define SYSCALL(SYS) "__s390x_" __stringify(SYS)
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#else
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#define SYSCALL(SYS) __stringify(SYS)
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#endif
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#endif
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