159 lines
4.1 KiB
ReStructuredText
159 lines
4.1 KiB
ReStructuredText
================
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bpftool-prog
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================
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-------------------------------------------------------------------------------
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tool for inspection and simple manipulation of eBPF progs
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-------------------------------------------------------------------------------
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:Manual section: 8
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SYNOPSIS
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========
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**bpftool** [*OPTIONS*] **prog** *COMMAND*
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*OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } }
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*COMMANDS* :=
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{ **show** | **dump xlated** | **dump jited** | **pin** | **load** | **help** }
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MAP COMMANDS
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=============
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| **bpftool** **prog show** [*PROG*]
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| **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes**}]
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| **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}]
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| **bpftool** **prog pin** *PROG* *FILE*
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| **bpftool** **prog load** *OBJ* *FILE*
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| **bpftool** **prog help**
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| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* }
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DESCRIPTION
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===========
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**bpftool prog show** [*PROG*]
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Show information about loaded programs. If *PROG* is
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specified show information only about given program, otherwise
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list all programs currently loaded on the system.
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Output will start with program ID followed by program type and
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zero or more named attributes (depending on kernel version).
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**bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** }]
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Dump eBPF instructions of the program from the kernel.
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If *FILE* is specified image will be written to a file,
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otherwise it will be disassembled and printed to stdout.
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**opcodes** controls if raw opcodes will be printed.
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**bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** }]
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Dump jited image (host machine code) of the program.
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If *FILE* is specified image will be written to a file,
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otherwise it will be disassembled and printed to stdout.
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**opcodes** controls if raw opcodes will be printed.
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**bpftool prog pin** *PROG* *FILE*
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Pin program *PROG* as *FILE*.
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Note: *FILE* must be located in *bpffs* mount.
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**bpftool prog load** *OBJ* *FILE*
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Load bpf program from binary *OBJ* and pin as *FILE*.
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Note: *FILE* must be located in *bpffs* mount.
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**bpftool prog help**
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Print short help message.
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OPTIONS
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=======
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-h, --help
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Print short generic help message (similar to **bpftool help**).
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-v, --version
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Print version number (similar to **bpftool version**).
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-j, --json
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Generate JSON output. For commands that cannot produce JSON, this
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option has no effect.
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-p, --pretty
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Generate human-readable JSON output. Implies **-j**.
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-f, --bpffs
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Show file names of pinned programs.
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EXAMPLES
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========
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**# bpftool prog show**
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::
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10: xdp name some_prog tag 005a3d2123620c8b
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loaded_at Sep 29/20:11 uid 0
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xlated 528B jited 370B memlock 4096B map_ids 10
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**# bpftool --json --pretty prog show**
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::
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{
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"programs": [{
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"id": 10,
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"type": "xdp",
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"tag": "005a3d2123620c8b",
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"loaded_at": "Sep 29/20:11",
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"uid": 0,
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"bytes_xlated": 528,
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"jited": true,
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"bytes_jited": 370,
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"bytes_memlock": 4096,
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"map_ids": [10
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]
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}
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]
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}
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| **# bpftool prog dump xlated id 10 file /tmp/t**
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| **# ls -l /tmp/t**
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| -rw------- 1 root root 560 Jul 22 01:42 /tmp/t
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**# bpftool prog dum jited tag 005a3d2123620c8b**
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::
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push %rbp
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mov %rsp,%rbp
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sub $0x228,%rsp
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sub $0x28,%rbp
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mov %rbx,0x0(%rbp)
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| **# mount -t bpf none /sys/fs/bpf/**
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| **# bpftool prog pin id 10 /sys/fs/bpf/prog**
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| **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2**
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| **# ls -l /sys/fs/bpf/**
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| -rw------- 1 root root 0 Jul 22 01:43 prog
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| -rw------- 1 root root 0 Jul 22 01:44 prog2
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**# bpftool prog dum jited pinned /sys/fs/bpf/prog opcodes**
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::
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push %rbp
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55
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mov %rsp,%rbp
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48 89 e5
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sub $0x228,%rsp
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48 81 ec 28 02 00 00
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sub $0x28,%rbp
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48 83 ed 28
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mov %rbx,0x0(%rbp)
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48 89 5d 00
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SEE ALSO
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========
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**bpftool**\ (8), **bpftool-map**\ (8), **bpftool-cgroup**\ (8)
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