Commits on Feb 12, 2024

1. [lld] Add target support for SystemZ (s390x) …

   This patch adds full support for linking SystemZ (ELF s390x) object
   files.  Support should be generally complete:
   - All relocation types are supported.
   - Full shared library support (DYNAMIC, GOT, PLT, ifunc).
   - Relaxation of TLS and GOT relocations where appropriate.
   - Platform-specific test cases.
   
   In addition to new platform code and the obvious changes, there were
   a few additional changes to common code:
   
   - Add three new RelExpr members (R_GOTPLT_GOTREL, R_GOTPLT_PC, and
     R_PLT_GOTREL) needed to support certain s390x relocations.
     I chose not to use a platform-specific name since nothing in
     the definition of these relocs is actually platform-specific;
     it is well possible that other platforms will need the same.
   
   - A couple of tweaks to TLS relocation handling, as the particular
     semantics of the s390x versions differ slightly.  See comments
     in the code.
   
   This was tested by building and testing >1500 Fedora packages,
   with only a handful of failures; as these also have issues when
   building with LLD on other architectures, they seem unrelated.
   
   Co-authored-by: Tulio Magno Quites Machado Filho <tuliom@redhat.com>

   

   uweigand and tuliom committed Feb 12, 2024
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