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![Daniel T. Lee](/assets/img/avatar_default.png)
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
13 lines
286 B
C
13 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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