[GHC] #9691: GHC-HEAD runtime is broken on arm

[GHC]

#9691: GHC-HEAD runtime is broken on arm
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       Reporter:  mkbrandt  |                   Owner:
           Type:  bug       |                  Status:  new
       Priority:  normal    |               Milestone:
      Component:  Compiler  |                 Version:  7.9
       Keywords:            |        Operating System:  Linux
   Architecture:  arm       |         Type of failure:  Runtime crash
     Difficulty:  Unknown   |               Test Case:
     Blocked By:            |                Blocking:
Related Tickets:            |  Differential Revisions:
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 I incorporated the patch from #9593 and built GHC HEAD as a cross compiler
 for arm-unknown-linux-gnueabi.

 mbrandt at ubuntu:~/ghc-head$ arm-unknown-linux-gnueabi-ghc --version
 The Glorious Glasgow Haskell Compilation System, version 7.9.20141014

 The resulting compiler will compile programs and link them resulting in
 what appears to be a valid executable (testme.hs is a simple hello world
 app):

 mbrandt at ubuntu:~/ghc-head$ file testme
 testme: ELF 32-bit LSB  executable, ARM, EABI5 version 1 (SYSV),
 dynamically linked (uses shared libs), for GNU/Linux 2.6.32,
 BuildID[sha1]=11ca9da291edb0428c977e506ac1a8f1e398aa57, not stripped

 When run on the target (an i.MX280 - ARM9EJ-S) the runtime gets hung up
 before main is evaluated. The program is using 90+% cpu.

 This behavior is consistent for both HEAD and ghc-7.8.3 with both
 registerized and unregisterized builds.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9691>
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