Kristofer Jonsson | e56b6e4 | 2022-09-29 11:52:22 +0200 | [diff] [blame] | 1 | # |
| 2 | # SPDX-FileCopyrightText: Copyright 2022 Arm Limited and/or its affiliates <open-source-office@arm.com> |
| 3 | # |
| 4 | # SPDX-License-Identifier: Apache-2.0 |
| 5 | # |
| 6 | # Licensed under the Apache License, Version 2.0 (the License); you may |
| 7 | # not use this file except in compliance with the License. |
| 8 | # You may obtain a copy of the License at |
| 9 | # |
| 10 | # www.apache.org/licenses/LICENSE-2.0 |
| 11 | # |
| 12 | # Unless required by applicable law or agreed to in writing, software |
| 13 | # distributed under the License is distributed on an AS IS BASIS, WITHOUT |
| 14 | # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | # See the License for the specific language governing permissions and |
| 16 | # limitations under the License. |
| 17 | # |
| 18 | |
| 19 | def elfFindSymbol(elf, name): |
| 20 | from elftools.elf.sections import SymbolTableSection |
| 21 | |
| 22 | for section in elf.iter_sections(): |
| 23 | if isinstance(section, SymbolTableSection): |
| 24 | symbol = section.get_symbol_by_name(name) |
| 25 | if symbol: |
| 26 | return symbol[0] |
| 27 | |
| 28 | return None |
| 29 | |
| 30 | def elfGetData(elf, address, size): |
| 31 | for section in elf.iter_sections(): |
| 32 | if address >= section.header['sh_addr'] and \ |
| 33 | (address + size) < (section.header['sh_addr'] + section.header['sh_size']): |
| 34 | offset = address - section.header['sh_addr'] |
| 35 | return bytearray(section.data()[offset:offset+size]) |
| 36 | |
| 37 | return None |
| 38 | |
| 39 | def elfGetSymbolData(elf, name): |
| 40 | from sys import stderr |
| 41 | |
| 42 | symbol = elfFindSymbol(elf, name) |
| 43 | if not symbol: |
| 44 | stderr.write(f'Failed to find symbol {name}\n') |
| 45 | return None |
| 46 | |
| 47 | return elfGetData(elf, symbol.entry.st_value, symbol.entry.st_size) |