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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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254471e57a
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>
71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/*
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* Copyright (C) 2018 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __BPF_TOOL_XLATED_DUMPER_H
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#define __BPF_TOOL_XLATED_DUMPER_H
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#define SYM_MAX_NAME 256
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struct kernel_sym {
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unsigned long address;
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char name[SYM_MAX_NAME];
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};
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struct dump_data {
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unsigned long address_call_base;
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struct kernel_sym *sym_mapping;
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__u32 sym_count;
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__u64 *jited_ksyms;
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__u32 nr_jited_ksyms;
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struct btf *btf;
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void *func_info;
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__u32 finfo_rec_size;
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char scratch_buff[SYM_MAX_NAME + 8];
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};
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void kernel_syms_load(struct dump_data *dd);
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void kernel_syms_destroy(struct dump_data *dd);
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struct kernel_sym *kernel_syms_search(struct dump_data *dd, unsigned long key);
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void dump_xlated_json(struct dump_data *dd, void *buf, unsigned int len,
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bool opcodes);
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void dump_xlated_plain(struct dump_data *dd, void *buf, unsigned int len,
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bool opcodes);
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void dump_xlated_for_graph(struct dump_data *dd, void *buf, void *buf_end,
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unsigned int start_index);
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#endif
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