1================ 2bpftool-prog 3================ 4------------------------------------------------------------------------------- 5tool for inspection and simple manipulation of eBPF progs 6------------------------------------------------------------------------------- 7 8:Manual section: 8 9 10SYNOPSIS 11======== 12 13 **bpftool** [*OPTIONS*] **prog** *COMMAND* 14 15 *OPTIONS* := { { **-j** | **--json** } [{ **-p** | **--pretty** }] | { **-f** | **--bpffs** } } 16 17 *COMMANDS* := 18 { **show** | **list** | **dump xlated** | **dump jited** | **pin** | **load** | **help** } 19 20MAP COMMANDS 21============= 22 23| **bpftool** **prog { show | list }** [*PROG*] 24| **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual**}] 25| **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}] 26| **bpftool** **prog pin** *PROG* *FILE* 27| **bpftool** **prog load** *OBJ* *FILE* 28| **bpftool** **prog help** 29| 30| *PROG* := { **id** *PROG_ID* | **pinned** *FILE* | **tag** *PROG_TAG* } 31 32DESCRIPTION 33=========== 34 **bpftool prog { show | list }** [*PROG*] 35 Show information about loaded programs. If *PROG* is 36 specified show information only about given program, otherwise 37 list all programs currently loaded on the system. 38 39 Output will start with program ID followed by program type and 40 zero or more named attributes (depending on kernel version). 41 42 **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** }] 43 Dump eBPF instructions of the program from the kernel. By 44 default, eBPF will be disassembled and printed to standard 45 output in human-readable format. In this case, **opcodes** 46 controls if raw opcodes should be printed as well. 47 48 If **file** is specified, the binary image will instead be 49 written to *FILE*. 50 51 If **visual** is specified, control flow graph (CFG) will be 52 built instead, and eBPF instructions will be presented with 53 CFG in DOT format, on standard output. 54 55 **bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** }] 56 Dump jited image (host machine code) of the program. 57 If *FILE* is specified image will be written to a file, 58 otherwise it will be disassembled and printed to stdout. 59 60 **opcodes** controls if raw opcodes will be printed. 61 62 **bpftool prog pin** *PROG* *FILE* 63 Pin program *PROG* as *FILE*. 64 65 Note: *FILE* must be located in *bpffs* mount. 66 67 **bpftool prog load** *OBJ* *FILE* 68 Load bpf program from binary *OBJ* and pin as *FILE*. 69 70 Note: *FILE* must be located in *bpffs* mount. 71 72 **bpftool prog help** 73 Print short help message. 74 75OPTIONS 76======= 77 -h, --help 78 Print short generic help message (similar to **bpftool help**). 79 80 -v, --version 81 Print version number (similar to **bpftool version**). 82 83 -j, --json 84 Generate JSON output. For commands that cannot produce JSON, this 85 option has no effect. 86 87 -p, --pretty 88 Generate human-readable JSON output. Implies **-j**. 89 90 -f, --bpffs 91 Show file names of pinned programs. 92 93EXAMPLES 94======== 95**# bpftool prog show** 96:: 97 98 10: xdp name some_prog tag 005a3d2123620c8b 99 loaded_at Sep 29/20:11 uid 0 100 xlated 528B jited 370B memlock 4096B map_ids 10 101 102**# bpftool --json --pretty prog show** 103 104:: 105 106 { 107 "programs": [{ 108 "id": 10, 109 "type": "xdp", 110 "tag": "005a3d2123620c8b", 111 "loaded_at": "Sep 29/20:11", 112 "uid": 0, 113 "bytes_xlated": 528, 114 "jited": true, 115 "bytes_jited": 370, 116 "bytes_memlock": 4096, 117 "map_ids": [10 118 ] 119 } 120 ] 121 } 122 123| 124| **# bpftool prog dump xlated id 10 file /tmp/t** 125| **# ls -l /tmp/t** 126| -rw------- 1 root root 560 Jul 22 01:42 /tmp/t 127 128**# bpftool prog dum jited tag 005a3d2123620c8b** 129 130:: 131 132 push %rbp 133 mov %rsp,%rbp 134 sub $0x228,%rsp 135 sub $0x28,%rbp 136 mov %rbx,0x0(%rbp) 137 138| 139| **# mount -t bpf none /sys/fs/bpf/** 140| **# bpftool prog pin id 10 /sys/fs/bpf/prog** 141| **# bpftool prog load ./my_prog.o /sys/fs/bpf/prog2** 142| **# ls -l /sys/fs/bpf/** 143| -rw------- 1 root root 0 Jul 22 01:43 prog 144| -rw------- 1 root root 0 Jul 22 01:44 prog2 145 146**# bpftool prog dum jited pinned /sys/fs/bpf/prog opcodes** 147 148:: 149 150 push %rbp 151 55 152 mov %rsp,%rbp 153 48 89 e5 154 sub $0x228,%rsp 155 48 81 ec 28 02 00 00 156 sub $0x28,%rbp 157 48 83 ed 28 158 mov %rbx,0x0(%rbp) 159 48 89 5d 00 160 161 162SEE ALSO 163======== 164 **bpftool**\ (8), **bpftool-map**\ (8), **bpftool-cgroup**\ (8) 165