llvm-project

Commit Graph

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	795dc5a0fb	Move target independent code out of x86_64 only path. The logic for deciding if an undefined symbol should have the value of a got entry is not target specific. llvm-svn: 261760	2016-02-24 18:24:23 +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

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

795dc5a0fb

Move target independent code out of x86_64 only path.

The logic for deciding if an undefined symbol should have the value of a
got entry is not target specific.

llvm-svn: 261760

2016-02-24 18:24:23 +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

3 Commits