d75383400e
1.【需求描述】 动态库开发部分： gcc的sample code。 提供生成暴露接口生成机制，并允许产品新增需要暴露的接口。 提供可以判断库允许资源大小的能力，并提供相关工具辅助开发者确定开发的库要求的资源是否可以满足。 动态库运行部分： 提供elf load的api，可以加载指定路径下的库，并完成符号重映射等运行准备。 提供elf 暴露符号调用的api，用于调用库的api。 elf加载&链接异常时，有明确错误记录，返回明确错误类型。 提供elf 卸载的api。 2.【方案描述】 (1) 通过灌段的形式记录需要导出符号的地址信息，用于暴露内核对外的接口，在加载链接器中通过查询 对应的符号信息获取符号地址。 (2) 加载链接时，解析共享库并将共享库中可加载段通过文件系统读入内存中，并对共享库中未定义的、 需要重定位的符号进行重定位。需要调用符号时，根据符号名通过哈希表即可查询共享库提供的对应符号 的地址。 BREAKING CHANGE: 新增4个对外接口，声明在los_dynlink.h文件中，分别为： (1) LOS_DynlinkInit: 动态加载模块初始化。 (2) LOS_SoLoad: 加载指定路径的共享库。 (3) LOS_FindSym: 根据共享库句柄查找指定符号。 (4) LOS_SoUnload: 卸载共享库。 close #I418HJ Signed-off-by: Haryslee <lihao189@huawei.com> Change-Id: I7669b7ef20096294f9d1094c85ac6602fefad354
66 lines
2.3 KiB
Bash
Executable File
66 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2021-2021 Huawei Device Co., Ltd. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice, this list of
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# conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice, this list
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# of conditions and the following disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors may be used
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# to endorse or promote products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# Description: The script is used to calculate the memory size that the specified shared library
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# will occupy when loading to the RAM.
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READELF=readelf
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RM=rm
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SIZE=0x0
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SIZE_ALL=0x0
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SIZE_MAX=0
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TMP_FILE=tmp.txt
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if [ $# -lt 1 ]; then
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echo "Usage: ./so_parse lib.so"
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exit 1
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fi
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parse_line()
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{
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MEM_SIZE=$(echo $1 | awk '{print $6}')
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echo ${MEM_SIZE}
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}
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${READELF} -l $1 | while read line; do
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HEAD_STRING=$(echo ${line} | awk '{print $1}')
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if [[ "${HEAD_STRING}" == *"LOAD"* ]]; then
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SIZE=`parse_line "${line}"`
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SIZE=`echo ${SIZE}`
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SIZE_ALL=$((SIZE_ALL+SIZE))
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fi
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echo ${SIZE_ALL} >> ${TMP_FILE}
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done
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NEED_SIZE=`tail -n 1 ${TMP_FILE}`
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echo "${NEED_SIZE} kb memory to reserve for $1!"
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${RM} -f ${TMP_FILE}
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