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-rw-r--r--tools/bpf/bpftool/Documentation/bpftool-prog.rst18
1 files changed, 12 insertions, 6 deletions
diff --git a/tools/bpf/bpftool/Documentation/bpftool-prog.rst b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
index e4ceee7f2dff..67ca6c69376c 100644
--- a/tools/bpf/bpftool/Documentation/bpftool-prog.rst
+++ b/tools/bpf/bpftool/Documentation/bpftool-prog.rst
@@ -21,7 +21,7 @@ MAP COMMANDS
=============
| **bpftool** **prog { show | list }** [*PROG*]
-| **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes**}]
+| **bpftool** **prog dump xlated** *PROG* [{**file** *FILE* | **opcodes** | **visual**}]
| **bpftool** **prog dump jited** *PROG* [{**file** *FILE* | **opcodes**}]
| **bpftool** **prog pin** *PROG* *FILE*
| **bpftool** **prog load** *OBJ* *FILE*
@@ -39,12 +39,18 @@ 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* | **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.
+ **bpftool prog dump xlated** *PROG* [{ **file** *FILE* | **opcodes** | **visual** }]
+ Dump eBPF instructions of the program from the kernel. By
+ default, eBPF will be disassembled and printed to standard
+ output in human-readable format. In this case, **opcodes**
+ controls if raw opcodes should be printed as well.
- **opcodes** controls if raw opcodes will be printed.
+ If **file** is specified, the binary image will instead be
+ written to *FILE*.
+
+ If **visual** is specified, control flow graph (CFG) will be
+ built instead, and eBPF instructions will be presented with
+ CFG in DOT format, on standard output.
**bpftool prog dump jited** *PROG* [{ **file** *FILE* | **opcodes** }]
Dump jited image (host machine code) of the program.