| title | description |
|---|---|
Helper Function 'bpf_get_func_ret' |
This page documents the 'bpf_get_func_ret' eBPF helper function, including its defintion, usage, program types that can use it, and examples. |
Copyright (c) 2015 The Libbpf Authors. All rights reserved.
Get return value of the traced function (for tracing programs) in value.
0 on success. -EOPNOTSUPP for tracing programs other than BPF_TRACE_FEXIT or BPF_MODIFY_RETURN.
#!c static long (* const bpf_get_func_ret)(void *ctx, __u64 *value) = (void *) 184;
!!! example "Docs could be improved" This part of the docs is incomplete, contributions are very welcome
This helper call can be used in the following program types:
- BPF_PROG_TYPE_CGROUP_DEVICE
- BPF_PROG_TYPE_CGROUP_SOCK
- BPF_PROG_TYPE_CGROUP_SOCKOPT
- BPF_PROG_TYPE_CGROUP_SOCK_ADDR
- BPF_PROG_TYPE_CGROUP_SYSCTL
- BPF_PROG_TYPE_KPROBE
- BPF_PROG_TYPE_LSM
- BPF_PROG_TYPE_PERF_EVENT
- BPF_PROG_TYPE_RAW_TRACEPOINT
- BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE
- BPF_PROG_TYPE_SK_MSG
- BPF_PROG_TYPE_SYSCALL
- BPF_PROG_TYPE_TRACEPOINT
- BPF_PROG_TYPE_TRACING
!!! example "Docs could be improved" This part of the docs is incomplete, contributions are very welcome