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df8ff35311
Move BPF_PROG, BPF_KPROBE, and BPF_KRETPROBE macro into libbpf's bpf_tracing.h header to make it available for non-selftests users. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200229231112.1240137-5-andriin@fb.com
27 lines
527 B
C
27 lines
527 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/ptrace.h>
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#include <linux/bpf.h>
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#include <netinet/in.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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static struct sockaddr_in old;
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SEC("kprobe/__sys_connect")
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int BPF_KPROBE(handle_sys_connect)
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{
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void *ptr = (void *)PT_REGS_PARM2(ctx);
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struct sockaddr_in new;
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bpf_probe_read_user(&old, sizeof(old), ptr);
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__builtin_memset(&new, 0xab, sizeof(new));
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bpf_probe_write_user(ptr, &new, sizeof(new));
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return 0;
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}
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char _license[] SEC("license") = "GPL";
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