ELF 核心文件格式 [英] ELF core file format

问题描述

没有深入挖掘 GDB 源代码，我在哪里可以找到有关用于创建核心文件的格式的文档?

Short of digging through GDB source, where can I find documentation about the format used to create core files?

ELF 规范使核心文件格式保持开放，所以我想这应该是一部分GDB 规范！遗憾的是，我没有从 GNU 的 gdb 文档中找到这方面的任何帮助.

The ELF specification leaves the core file format open, so I guess this should be part of the GDB specifications! Sadly, I did not find any help in this regard from GNU's gdb documentation.

这就是我想要做的事情:将虚拟地址映射到包含正在运行的进程的可执行文件/库中的函数名称.为此，我首先想从核心文件中找出从虚拟地址空间到可执行文件/库名称的映射，然后挖掘相关文件以获取符号信息.

Here's what I am trying to do: Map virtual addresses to function names in executable/libraries that comprised the running process. To do that, I would first like to figure out, from the core file, the map from virtual address space to the name of the executable file/libraries, and then dig into the relevant file to get the symbolic information.

现在readelf -a core"告诉我核心文件中几乎所有的段都是load"类型的——我猜这些是所有参与的 .text 和 .bss/.data 段文件，加上一个堆栈段.除了这些加载段之外，还有一个音符段，但似乎不包含地图.那么一个段对应哪个文件的信息，是如何存储在核心文件中的呢?这些加载"段是否以特定方式包含文件信息?

Now 'readelf -a core' tells me that nearly all the segments in the core file are of the type 'load' -- I'd guess these are the .text and .bss/.data segments from all the participating files, plus a stack segment. Barring these load segments, there is one note segment, but that does not seem to contain the map. So how is the information about which file a segment corresponds to, stored in the core file? Are those 'load' segments format in a particular way to include the file information?

推荐答案

与其说是 gdb 不如说是 gdb 使用的 bfd 库，binutils等

Not so much gdb as the bfd library used by gdb, binutils, etc.

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