1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (c) 2020 Facebook */
5 #include <bpf/bpf_helpers.h>
6 #include <bpf/bpf_tracing.h>
7 #include <bpf/bpf_core_read.h>
11 char buf_in1[MAX_LEN] = {};
12 char buf_in2[MAX_LEN] = {};
18 __u64 payload1_len1 = 0;
19 __u64 payload1_len2 = 0;
21 char payload1[MAX_LEN + MAX_LEN] = {};
24 int payload2_len1 = -1;
25 int payload2_len2 = -1;
27 char payload2[MAX_LEN + MAX_LEN] = { 1 };
29 int payload3_len1 = -1;
30 int payload3_len2 = -1;
32 char payload3[MAX_LEN + MAX_LEN] = { 1 };
34 int payload4_len1 = -1;
35 int payload4_len2 = -1;
37 char payload4[MAX_LEN + MAX_LEN] = { 1 };
39 SEC("raw_tp/sys_enter")
40 int handler64_unsigned(void *regs)
42 int pid = bpf_get_current_pid_tgid() >> 32;
43 void *payload = payload1;
46 /* ignore irrelevant invocations */
47 if (test_pid != pid || !capture)
50 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in1[0]);
56 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in2[0]);
62 total1 = payload - (void *)payload1;
67 SEC("raw_tp/sys_exit")
68 int handler64_signed(void *regs)
70 int pid = bpf_get_current_pid_tgid() >> 32;
71 void *payload = payload3;
74 /* ignore irrelevant invocations */
75 if (test_pid != pid || !capture)
78 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in1[0]);
83 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in2[0]);
88 total3 = payload - (void *)payload3;
93 SEC("tp/raw_syscalls/sys_enter")
94 int handler32_unsigned(void *regs)
96 int pid = bpf_get_current_pid_tgid() >> 32;
97 void *payload = payload2;
100 /* ignore irrelevant invocations */
101 if (test_pid != pid || !capture)
104 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in1[0]);
105 if (len <= MAX_LEN) {
110 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in2[0]);
111 if (len <= MAX_LEN) {
116 total2 = payload - (void *)payload2;
121 SEC("tp/raw_syscalls/sys_exit")
122 int handler32_signed(void *regs)
124 int pid = bpf_get_current_pid_tgid() >> 32;
125 void *payload = payload4;
128 /* ignore irrelevant invocations */
129 if (test_pid != pid || !capture)
132 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in1[0]);
137 len = bpf_probe_read_kernel_str(payload, MAX_LEN, &buf_in2[0]);
142 total4 = payload - (void *)payload4;
147 SEC("tp/syscalls/sys_exit_getpid")
148 int handler_exit(void *regs)
152 if (bpf_probe_read_kernel(&bla, sizeof(bla), 0))
158 char LICENSE[] SEC("license") = "GPL";