72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.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_kfuncs.h"
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#include "bpf_misc.h"
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char _license[] SEC("license") = "GPL";
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__u64 uprobe_multi_func_1_addr = 0;
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__u64 uprobe_multi_func_2_addr = 0;
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__u64 uprobe_multi_func_3_addr = 0;
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__u64 uprobe_session_result[3] = {};
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__u64 uprobe_multi_sleep_result = 0;
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void *user_ptr = 0;
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int pid = 0;
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static int uprobe_multi_check(void *ctx, bool is_return)
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{
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const __u64 funcs[] = {
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uprobe_multi_func_1_addr,
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uprobe_multi_func_2_addr,
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uprobe_multi_func_3_addr,
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};
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unsigned int i;
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__u64 addr;
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if (bpf_get_current_pid_tgid() >> 32 != pid)
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return 1;
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addr = bpf_get_func_ip(ctx);
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for (i = 0; i < ARRAY_SIZE(funcs); i++) {
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if (funcs[i] == addr) {
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uprobe_session_result[i]++;
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break;
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}
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}
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/* only uprobe_multi_func_2 executes return probe */
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if ((addr == uprobe_multi_func_1_addr) ||
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(addr == uprobe_multi_func_3_addr))
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return 1;
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return 0;
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}
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SEC("uprobe.session//proc/self/exe:uprobe_multi_func_*")
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int uprobe(struct pt_regs *ctx)
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{
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return uprobe_multi_check(ctx, bpf_session_is_return());
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}
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static __always_inline bool verify_sleepable_user_copy(void)
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{
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char data[9];
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bpf_copy_from_user(data, sizeof(data), user_ptr);
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return bpf_strncmp(data, sizeof(data), "test_data") == 0;
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}
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SEC("uprobe.session.s//proc/self/exe:uprobe_multi_func_*")
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int uprobe_sleepable(struct pt_regs *ctx)
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{
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if (verify_sleepable_user_copy())
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uprobe_multi_sleep_result++;
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return uprobe_multi_check(ctx, bpf_session_is_return());
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}
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