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Robin Nicholson 2018-03-16 23:56:29 +01:00
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@ -10,6 +10,6 @@ Call graph after change(the code does not change, but the runtime execution does
![](https://github.com/mollismerx/elfspy/blob/master/images/spy%20after.png)
This technique relies on code being compiled as [position independent code](https://en.wikipedia.org/wiki/Position-independent_code) and uses the Executable and Linking Format([ELF](https://refspecs.linuxfoundation.org/elf/elf.pdf)) information found in the executable and its shared libraries to find the global offset table entries.
This technique relies on code being compiled as [position independent code](https://en.wikipedia.org/wiki/Position-independent_code) and uses the Executable and Linking Format([ELF](https://refspecs.linuxfoundation.org/elf/elf.pdf)) information found in the executable and its shared libraries to find the global offset table entriesi and modify them.
To see how ELFspy can be used start by reading this [example](https://github.com/mollismerx/elfspy/wiki/Example-01:-Spying-on-code)