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tools: bpftool: use the kernel's instruction printer

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Compile the instruction printer from kernel/bpf and use it
for disassembling "translated" eBPF code.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2017-10-09 10:30:13 -07:00
committed by David S. Miller
parent f4ac7e0b5c
commit c9c35995bc
4 changed files with 51 additions and 21 deletions
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11
tools/bpf/bpftool/Documentation/bpftool-prog.rst
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@@ -11,7 +11,7 @@ SYNOPSIS
========
| **bpftool** prog show [*PROG*]
| **bpftool** prog dump xlated *PROG* file *FILE*
| **bpftool** prog dump xlated *PROG* [file *FILE*] [opcodes]
| **bpftool** prog dump jited *PROG* [file *FILE*] [opcodes]
| **bpftool** prog pin *PROG* *FILE*
| **bpftool** prog help
@@ -28,9 +28,12 @@ DESCRIPTION
Output will start with program ID followed by program type and
zero or more named attributes (depending on kernel version).
**bpftool prog dump xlated** *PROG* **file** *FILE*
Dump eBPF instructions of the program from the kernel to a
file.
**bpftool prog dump xlated** *PROG* [**file** *FILE*] [**opcodes**]
Dump eBPF instructions of the program from the kernel.
If *FILE* is specified image will be written to a file,
otherwise it will be disassembled and printed to stdout.
**opcodes** controls if raw opcodes will be printed.
**bpftool prog dump jited** *PROG* [**file** *FILE*] [**opcodes**]
Dump jited image (host machine code) of the program.