在执行bpf_tail_call之前,打印before tail_call handle_udp 在bpf_tail_call调用函数handle_udp函数中,打印new udp packet captured (XDP) 在执行bpf_tail_call之后,打印after tail_call handle_udp 按照bpf_tail_call特性,如果bpf_tail_call执行成功,对应的eBPF程序将会执行并替换当前栈帧(当前eBPF的函数体就不再...
subprog 里使用 tailcall 的前提:bpf: allow for tailcalls in BPF subprograms for x64 JIT[2] since v5.10 kernel。 然而,在引入 tailcall in bpf2bpf 特性时,因为代码问题从而引入了这个问题。 在v5.19 内核里,commit ff672c67ee76 ("bpf, x86: Fix tail call count offset calculation on bpf2bpf c...
bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_PERF_EVENT_ARRAY, , key_size=4, value_size=4, max_entries=4, ... map_name="output", ...}, 128) = 4 You can probably guess from the command name BPF_MAP_CREATE that this call creates an eBPF map. You can see that the type of ...
最近在学习linux内置的沙盒:Seccomp-bpf,资料略少,最后找到了这个网站提供的例子。这个例子我已实验成功,能够正常阻止禁止的系统调用并结束程序,去掉禁止的系统调用后也能正常运行。但是当我尝试用execv运行另外一个程序时却失败了,显示Bad System Call。我已经使用syscall-reporter检查了需要允许的System Call,但是仍旧无...
Description of changes Disable zercallusedregs to fix build of bpftune. Without disabling it, I get error: builder for '/nix/store/ysv5kr8cxqizxdhr64k4v3khxyqyfr64-bpftune-0-unstable-2024-06-07.drv' failed with exit code 2; last 25 log lines:
go-seccomp-bpf is a library for Go (golang) for loading a system call filter on Linux 3.17 and later by taking advantage of secure computing mode, also known as seccomp. Seccomp restricts the system calls that a process can invoke.
bpf_jit_emit_func_call_rel() to simplify bpf function call JIT code. We don't actually need to load/restore TOC across a call out to a different kernel helper or to a different bpf program since they all work with the kernel TOC. We only need to do it if we have to call out ...
+static void test_uretprobe_syscall_call(void) +{ + LIBBPF_OPTS(bpf_uprobe_multi_opts, opts, + .retprobe = true, + ); + struct uprobe_syscall_executed *skel; + int pid, status, err, go[2], c; + + if (ASSERT_OK(pipe(go), "pipe")) ...
General information IMO: MMSI: 413515270 Callsign: BPFJ7 Width: 17.0 m Length: 114.0 m Deadweight: Gross tonnage: TEU: Liquid Capacity: Year of build: Class: AIS type: Cargo Ship Ship type: Flag: China Builder: Owner: Operator: Insurer: ...
Cargo Ship General information IMO: 9131204 MMSI: 413701040 Callsign: BPFC8 Width: 32.0 m Length: 185.0 m Deadweight: Gross tonnage: TEU: Liquid Capacity: Year of build: Class: AIS type: Cargo Ship Ship type: Flag: China Builder: