1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (c) 2022, Oracle and/or its affiliates. */ |
3 | |
4 | #include "vmlinux.h" |
5 | |
6 | #include <bpf/bpf_core_read.h> |
7 | #include <bpf/bpf_helpers.h> |
8 | #include <bpf/bpf_tracing.h> |
9 | #include "bpf_misc.h" |
10 | |
11 | int uprobe_byname_parm1 = 0; |
12 | int uprobe_byname_ran = 0; |
13 | int uretprobe_byname_rc = 0; |
14 | int uretprobe_byname_ret = 0; |
15 | int uretprobe_byname_ran = 0; |
16 | u64 uprobe_byname2_parm1 = 0; |
17 | int uprobe_byname2_ran = 0; |
18 | u64 uretprobe_byname2_rc = 0; |
19 | int uretprobe_byname2_ran = 0; |
20 | |
21 | int test_pid; |
22 | |
23 | int a[8]; |
24 | |
25 | /* This program cannot auto-attach, but that should not stop other |
26 | * programs from attaching. |
27 | */ |
28 | SEC("uprobe" ) |
29 | int handle_uprobe_noautoattach(struct pt_regs *ctx) |
30 | { |
31 | return 0; |
32 | } |
33 | |
34 | SEC("uprobe//proc/self/exe:autoattach_trigger_func" ) |
35 | int BPF_UPROBE(handle_uprobe_byname |
36 | , int arg1 |
37 | , int arg2 |
38 | , int arg3 |
39 | #if FUNC_REG_ARG_CNT > 3 |
40 | , int arg4 |
41 | #endif |
42 | #if FUNC_REG_ARG_CNT > 4 |
43 | , int arg5 |
44 | #endif |
45 | #if FUNC_REG_ARG_CNT > 5 |
46 | , int arg6 |
47 | #endif |
48 | #if FUNC_REG_ARG_CNT > 6 |
49 | , int arg7 |
50 | #endif |
51 | #if FUNC_REG_ARG_CNT > 7 |
52 | , int arg8 |
53 | #endif |
54 | ) |
55 | { |
56 | uprobe_byname_parm1 = PT_REGS_PARM1_CORE(ctx); |
57 | uprobe_byname_ran = 1; |
58 | |
59 | a[0] = arg1; |
60 | a[1] = arg2; |
61 | a[2] = arg3; |
62 | #if FUNC_REG_ARG_CNT > 3 |
63 | a[3] = arg4; |
64 | #endif |
65 | #if FUNC_REG_ARG_CNT > 4 |
66 | a[4] = arg5; |
67 | #endif |
68 | #if FUNC_REG_ARG_CNT > 5 |
69 | a[5] = arg6; |
70 | #endif |
71 | #if FUNC_REG_ARG_CNT > 6 |
72 | a[6] = arg7; |
73 | #endif |
74 | #if FUNC_REG_ARG_CNT > 7 |
75 | a[7] = arg8; |
76 | #endif |
77 | return 0; |
78 | } |
79 | |
80 | SEC("uretprobe//proc/self/exe:autoattach_trigger_func" ) |
81 | int BPF_URETPROBE(handle_uretprobe_byname, int ret) |
82 | { |
83 | uretprobe_byname_rc = PT_REGS_RC_CORE(ctx); |
84 | uretprobe_byname_ret = ret; |
85 | uretprobe_byname_ran = 2; |
86 | |
87 | return 0; |
88 | } |
89 | |
90 | |
91 | SEC("uprobe/libc.so.6:fopen" ) |
92 | int BPF_UPROBE(handle_uprobe_byname2, const char *pathname, const char *mode) |
93 | { |
94 | int pid = bpf_get_current_pid_tgid() >> 32; |
95 | |
96 | /* ignore irrelevant invocations */ |
97 | if (test_pid != pid) |
98 | return 0; |
99 | uprobe_byname2_parm1 = (u64)(long)pathname; |
100 | uprobe_byname2_ran = 3; |
101 | return 0; |
102 | } |
103 | |
104 | SEC("uretprobe/libc.so.6:fopen" ) |
105 | int BPF_URETPROBE(handle_uretprobe_byname2, void *ret) |
106 | { |
107 | int pid = bpf_get_current_pid_tgid() >> 32; |
108 | |
109 | /* ignore irrelevant invocations */ |
110 | if (test_pid != pid) |
111 | return 0; |
112 | uretprobe_byname2_rc = (u64)(long)ret; |
113 | uretprobe_byname2_ran = 4; |
114 | return 0; |
115 | } |
116 | |
117 | char _license[] SEC("license" ) = "GPL" ; |
118 | |