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Message-ID: <20181208004224.2494845-1-kafai@fb.com>
Date: Fri, 7 Dec 2018 16:42:24 -0800
From: Martin KaFai Lau <kafai@...com>
To: <netdev@...r.kernel.org>
CC: Alexei Starovoitov <ast@...com>,
Daniel Borkmann <daniel@...earbox.net>, <kernel-team@...com>
Subject: [PATCH bpf-next 0/7] Introduce bpf_line_info
This patch series introduces the bpf_line_info. Please see individual patch
for details.
It will be useful for introspection purpose, like:
[root@...h-fb-vm1 bpf]# ~/devshare/fb-kernel/linux/tools/bpf/bpftool/bpftool prog dump jited pinned /sys/fs/bpf/test_btf_haskv
[...]
int test_long_fname_2(struct dummy_tracepoint_args * arg):
bpf_prog_44a040bf25481309_test_long_fname_2:
; static int test_long_fname_2(struct dummy_tracepoint_args *arg)
0: push %rbp
1: mov %rsp,%rbp
4: sub $0x30,%rsp
b: sub $0x28,%rbp
f: mov %rbx,0x0(%rbp)
13: mov %r13,0x8(%rbp)
17: mov %r14,0x10(%rbp)
1b: mov %r15,0x18(%rbp)
1f: xor %eax,%eax
21: mov %rax,0x20(%rbp)
25: xor %esi,%esi
; int key = 0;
27: mov %esi,-0x4(%rbp)
; if (!arg->sock)
2a: mov 0x8(%rdi),%rdi
; if (!arg->sock)
2e: cmp $0x0,%rdi
32: je 0x0000000000000070
34: mov %rbp,%rsi
; counts = bpf_map_lookup_elem(&btf_map, &key);
37: add $0xfffffffffffffffc,%rsi
3b: movabs $0xffff8881139d7480,%rdi
45: add $0x110,%rdi
4c: mov 0x0(%rsi),%eax
4f: cmp $0x4,%rax
53: jae 0x000000000000005e
55: shl $0x3,%rax
59: add %rdi,%rax
5c: jmp 0x0000000000000060
5e: xor %eax,%eax
; if (!counts)
60: cmp $0x0,%rax
64: je 0x0000000000000070
; counts->v6++;
66: mov 0x4(%rax),%edi
69: add $0x1,%rdi
6d: mov %edi,0x4(%rax)
70: mov 0x0(%rbp),%rbx
74: mov 0x8(%rbp),%r13
78: mov 0x10(%rbp),%r14
7c: mov 0x18(%rbp),%r15
80: add $0x28,%rbp
84: leaveq
85: retq
[...]
Martin KaFai Lau (7):
bpf: Add bpf_line_info support
bpf: tools: Sync uapi bpf.h
bpf: Refactor and bug fix in test_func_type in test_btf.c
bpf: Add unit tests for bpf_line_info
bpf: libbpf: Refactor and bug fix on the bpf_func_info loading logic
bpf: libbpf: Add btf_line_info support to libbpf
bpf: libbpf: bpftool: Print bpf_line_info during prog dump
arch/x86/net/bpf_jit_comp.c | 2 +
include/linux/bpf.h | 21 +
include/linux/bpf_verifier.h | 1 +
include/linux/btf.h | 1 +
include/linux/filter.h | 7 +
include/uapi/linux/bpf.h | 19 +
kernel/bpf/btf.c | 2 +-
kernel/bpf/core.c | 118 ++-
kernel/bpf/syscall.c | 83 +-
kernel/bpf/verifier.c | 198 ++++-
.../bpftool/Documentation/bpftool-prog.rst | 16 +-
tools/bpf/bpftool/bash-completion/bpftool | 6 +-
tools/bpf/bpftool/btf_dumper.c | 64 ++
tools/bpf/bpftool/jit_disasm.c | 23 +-
tools/bpf/bpftool/main.h | 23 +-
tools/bpf/bpftool/prog.c | 100 ++-
tools/bpf/bpftool/xlated_dumper.c | 30 +-
tools/bpf/bpftool/xlated_dumper.h | 7 +-
tools/include/uapi/linux/bpf.h | 19 +
tools/lib/bpf/Build | 2 +-
tools/lib/bpf/bpf.c | 93 ++-
tools/lib/bpf/bpf.h | 3 +
tools/lib/bpf/bpf_prog_linfo.c | 253 ++++++
tools/lib/bpf/btf.c | 342 ++++----
tools/lib/bpf/btf.h | 25 +-
tools/lib/bpf/libbpf.c | 159 +++-
tools/lib/bpf/libbpf.h | 13 +
tools/lib/bpf/libbpf.map | 4 +
tools/testing/selftests/bpf/test_btf.c | 790 +++++++++++++++---
29 files changed, 2036 insertions(+), 388 deletions(-)
create mode 100644 tools/lib/bpf/bpf_prog_linfo.c
--
2.17.1
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