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33 lines
768 B
33 lines
768 B
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Hook into 'openat' syscall entry tracepoint |
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* |
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* Test it with: |
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* |
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* perf trace -e tools/perf/examples/bpf/sys_enter_openat.c cat /etc/passwd > /dev/null |
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* |
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* It'll catch some openat syscalls related to the dynamic linked and |
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* the last one should be the one for '/etc/passwd'. |
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* |
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* The syscall_enter_openat_args can be used to get the syscall fields |
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* and use them for filtering calls, i.e. use in expressions for |
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* the return value. |
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*/ |
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#include <bpf/bpf.h> |
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struct syscall_enter_openat_args { |
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unsigned long long unused; |
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long syscall_nr; |
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long dfd; |
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char *filename_ptr; |
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long flags; |
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long mode; |
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}; |
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int syscall_enter(openat)(struct syscall_enter_openat_args *args) |
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{ |
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return 1; |
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} |
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license(GPL);
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