On Fri, 4 Aug 2017 16:20:19 -0600, David Ahern wrote:
> On 7/22/17 1:20 AM, Jakub Kicinski wrote:
> > I put together this very simple tool with iproute2-like syntax:
> >
> > https://github.com/Netronome/bpf-tool
> >
> > These are available subcommands:
> >
>
> Looking to add my code that pretty-prints instructions, but having
> trouble building the tool. What bpf headers should be installed? e.g.,
> <bpf/bpf.h>. hunting and pecking now based on what is in the kernel tree.
Hmm.. Did you run make install_headers? I think my commit message
diverged from what the Makefile does. To keep things in line with
tools/lib/traceevent/Makefile I made it a separate target.
I just tested on fresh Fedora 26 w/ net-next:
$ git rev-parse HEAD
a54df682e559da9cf09b41779ee62bc9f11d3804
$ make headers_install INSTALL_HDR_PATH=/usr/
[...]
$ cd tools/lib/bpf/
$ make -j 6
Auto-detecting system features:
... libelf: [ on ]
... bpf: [ on ]
Warning: tools/include/uapi/linux/bpf.h differs from kernel
CC libbpf.o
CC bpf.o
LD libbpf-in.o
LINK libbpf.a
LINK libbpf.so
$ sudo make install prefix=/usr/
Password:
Warning: tools/include/uapi/linux/bpf.h differs from kernel
INSTALL libbpf.a
INSTALL libbpf.so
$ sudo make install_headers
INSTALL headers
$ cd ../bpf-tool
$ make
gcc -std=gnu99 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow -c -MMD -o bpf-map.o bpf-map.c
gcc -std=gnu99 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow -c -MMD -o bpf-prog.o bpf-prog.c
gcc -std=gnu99 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow -c -MMD -o bpf-common.o bpf-common.c
gcc -std=gnu99 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow -c -MMD -o bpf-jit-disasm.o bpf-jit-disasm.c
gcc -std=gnu99 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow -o bpftool bpf.o bpf-map.o bpf-prog.o bpf-common.o bpf-jit-disasm.o -lelf -lbpf -lelf -lbfd -lopcodes
$ ./bpftool
Usage: ./bpftool OBJECT { COMMAND | help }
./bpftool batch file FILE
OBJECT := { program | map }
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