Commit Graph

2 Commits

Author SHA1 Message Date
Rafael Espindola a85efd985c Don't create dynamic relocations to ro segments.
These would just crash at runtime.

If we ever decide to support rw text segments this should make it easier
to implement as there is now a single point where we notice the problem.

I have tested this with a freebsd buildworld. It found a non pic
assembly file being linked into a .so,. With that fixed, buildworld
finished.

llvm-svn: 268149
2016-04-30 01:15:17 +00:00
Rafael Espindola a0a65f973a Use the plt entry as the address of some symbols.
This is the function equivalent of a copy relocation.

Since functions are expected to change sizes, we cannot use copy
relocations. In situations where one would be needed, what is done
instead is:
* Create a plt entry
* Output an undefined symbol whose addr is the plt entry.

The dynamic linker makes sure any shared library uses the plt entry as
the function address.

llvm-svn: 260224
2016-02-09 15:11:01 +00:00