[GHC] #11490: check architecture before attempting to load object files

[GHC]

#11490: check architecture before attempting to load object files
-------------------------------------+-------------------------------------
           Reporter:  rwbarton       |             Owner:
               Type:  bug            |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Runtime        |           Version:  8.0.1-rc1
  System (Linker)                    |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Other
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 If a user somehow manages to trick ghci into loading a `.o` file for the
 wrong architecture (e.g. arm vs x86), the runtime linker doesn't notice
 and tries to load it anyway. That is likely to result in a confusing error
 or crash.

 `ocVerifyImage_ELF` does already check the "ELF class", which amounts to
 32-bit vs 64-bit. It should also check the architecture and, I think,
 endianness to make sure they are compatible with the running process.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11490>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler