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254471e57a
linux/tools/bpf/bpftool
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Yonghong Song 254471e57a tools/bpf: bpftool: add support for func types 
This patch added support to print function signature
if btf func_info is available. Note that ksym
now uses function name instead of prog_name as
prog_name has a limit of 16 bytes including
ending '\0'.

The following is a sample output for selftests
test_btf with file test_btf_haskv.o for translated insns
and jited insns respectively.

  $ bpftool prog dump xlated id 1
  int _dummy_tracepoint(struct dummy_tracepoint_args * arg):
     0: (85) call pc+2#bpf_prog_2dcecc18072623fc_test_long_fname_1
     1: (b7) r0 = 0
     2: (95) exit
  int test_long_fname_1(struct dummy_tracepoint_args * arg):
     3: (85) call pc+1#bpf_prog_89d64e4abf0f0126_test_long_fname_2
     4: (95) exit
  int test_long_fname_2(struct dummy_tracepoint_args * arg):
     5: (b7) r2 = 0
     6: (63) *(u32 *)(r10 -4) = r2
     7: (79) r1 = *(u64 *)(r1 +8)
     ...
     22: (07) r1 += 1
     23: (63) *(u32 *)(r0 +4) = r1
     24: (95) exit

  $ bpftool prog dump jited id 1
  int _dummy_tracepoint(struct dummy_tracepoint_args * arg):
  bpf_prog_b07ccb89267cf242__dummy_tracepoint:
     0:   push   %rbp
     1:   mov    %rsp,%rbp
    ......
    3c:   add    $0x28,%rbp
    40:   leaveq
    41:   retq

  int test_long_fname_1(struct dummy_tracepoint_args * arg):
  bpf_prog_2dcecc18072623fc_test_long_fname_1:
     0:   push   %rbp
     1:   mov    %rsp,%rbp
    ......
    3a:   add    $0x28,%rbp
    3e:   leaveq
    3f:   retq

  int test_long_fname_2(struct dummy_tracepoint_args * arg):
  bpf_prog_89d64e4abf0f0126_test_long_fname_2:
     0:   push   %rbp
     1:   mov    %rsp,%rbp
    ......
    80:   add    $0x28,%rbp
    84:   leaveq
    85:   retq

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2018-11-20 10:54:39 -08:00
..
bash-completion bpftool: support loading flow dissector 2018-11-10 15:56:11 -08:00
Documentation bpftool: support loading flow dissector 2018-11-10 15:56:11 -08:00
.gitignore tools/bpftool: ignore build products 2018-07-26 02:50:26 +02:00
btf_dumper.c tools/bpf: bpftool: add support for func types 2018-11-20 10:54:39 -08:00
cfg.c tools: bpftool: generate .dot graph from CFG information 2018-03-01 18:29:49 -08:00
cfg.h tools: bpftool: detect sub-programs from the eBPF sequence 2018-03-01 18:29:48 -08:00
cgroup.c bpftool: introduce cgroup tree command 2018-07-07 01:38:38 +02:00
common.c bpftool: add loadall command 2018-11-10 15:56:11 -08:00
jit_disasm.c bpftool: make libbfd optional 2018-11-16 20:45:01 -08:00
json_writer.c tools: bpftool: add JSON output for bpftool prog dump xlated * command 2017-10-24 01:25:08 +01:00
json_writer.h tools: bpftool: add JSON output for bpftool prog dump xlated * command 2017-10-24 01:25:08 +01:00
main.c bpftool: make libbfd optional 2018-11-16 20:45:01 -08:00
main.h tools/bpf: bpftool: add support for func types 2018-11-20 10:54:39 -08:00
Makefile bpftool: make libbfd optional 2018-11-16 20:45:01 -08:00
map_perf_ring.c bpf, libbpf: simplify and cleanup perf ring buffer walk 2018-10-20 23:13:32 -07:00
map.c tools/bpf: refactor to implement btf_get_from_id() in lib/bpf 2018-11-20 10:54:39 -08:00
net.c libbpf: Consistent prefixes for interfaces in nlattr.h. 2018-10-04 16:04:16 +02:00
netlink_dumper.c libbpf: Consistent prefixes for interfaces in nlattr.h. 2018-10-04 16:04:16 +02:00
netlink_dumper.h bpftool: Fix bpftool net output 2018-09-27 21:07:44 +02:00
perf.c tools/bpftool: fix a bug in bpftool perf 2018-06-13 02:03:17 +02:00
prog.c tools/bpf: bpftool: add support for func types 2018-11-20 10:54:39 -08:00
xlated_dumper.c tools/bpf: bpftool: add support for func types 2018-11-20 10:54:39 -08:00
xlated_dumper.h tools/bpf: bpftool: add support for func types 2018-11-20 10:54:39 -08:00