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8fe4dc4f64
Add the function argument of "void *ctx" to bpf_session_cookie() and bpf_session_is_return(), which is a preparation of the next patch. The two kfunc is seldom used now, so it will not introduce much effect to change their function prototype. Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/r/20260124062008.8657-4-dongml2@chinatelecom.cn Signed-off-by: Alexei Starovoitov <ast@kernel.org>
44 lines
931 B
C
44 lines
931 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <vmlinux.h>
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include <stdbool.h>
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#include "bpf_misc.h"
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char _license[] SEC("license") = "GPL";
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int pid = 0;
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int idx_entry = 0;
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int idx_return = 0;
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__u64 test_uprobe_cookie_entry[6];
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__u64 test_uprobe_cookie_return[3];
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static int check_cookie(struct pt_regs *ctx)
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{
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__u64 *cookie = bpf_session_cookie(ctx);
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if (bpf_session_is_return(ctx)) {
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if (idx_return >= ARRAY_SIZE(test_uprobe_cookie_return))
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return 1;
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test_uprobe_cookie_return[idx_return++] = *cookie;
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return 0;
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}
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if (idx_entry >= ARRAY_SIZE(test_uprobe_cookie_entry))
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return 1;
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*cookie = test_uprobe_cookie_entry[idx_entry];
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return idx_entry++ % 2;
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}
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SEC("uprobe.session//proc/self/exe:uprobe_session_recursive")
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int uprobe_recursive(struct pt_regs *ctx)
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{
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if (bpf_get_current_pid_tgid() >> 32 != pid)
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return 1;
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return check_cookie(ctx);
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}
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