alt Hacker Newsld writes to the GOT. The executable segment where .text lives is not written to (it's position independent code in dynamic libraries).
ASLR is not an obstacle -- the same exact code can be mapped into different base addresses in different processes, so they can be backed by the same actual memory.
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gmueckl • today at 12:46 AM
I can't reconcile this with the code that GCC generates for accessing global variables. There is no additional indirection there, just a constant 0 address that needs to be replaced later.
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That’s true on most systems (modern or not), but actually never been true on Windows due to PE/COFF format limitations. But also, that system doesn’t/can’t do effective ASLR because of the binary slide being part of the object file spec.