If the execve@plt
contains the stub that calls into the linker, is the process of resolving the address of execve
guaranteed to not modify any of the parent's memory ?
After vfork(), how does the linker resolve execve() without clobbering parent memory?
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It doesn't call into the (staic) linker. It calls into the runtime loader (aka dynamic linker).
On the contrary: it will update the processes' GOT table1, before calling the
execve
system call wrapper inlibc.so.6
.1 Assuming lazy PLT resolution is in effect and
execve
has not already been resolved.