Re: [GHC] #8877: "if this code is reached, the program will abort" in unregisterised build

24 Mar 2015


      #8877: "if this code is reached, the program will abort" in unregisterised build
-------------------------------------+-------------------------------------
        Reporter:  nomeata           |                   Owner:
            Type:  bug               |                  Status:  closed
        Priority:  normal            |               Milestone:  7.10.1
       Component:  Compiler          |                 Version:  7.8.1-rc2
      Resolution:  fixed             |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Runtime crash     |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:  #8857             |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
Changes (by thomie):

 * cc: slyfox (added)
 * status:  new => closed
 * resolution:   => fixed
 * milestone:   => 7.10.1


Comment:

 This should be fixed, thanks to the following commits:

 In commit 78863edbb0751f5c9694ea10c6132a87cfd0ee10:
 {{{
 Author: Sergei Trofimovich <>
 Date:   Wed Aug 27 22:20:33 2014 +0300

     Revert "disable shared libs on sparc (linux/solaris) (fixes #8857)"

     This reverts commit 623883f1ed0ee11cc925c4590fb09565403fd231.

     The commit a93ab43ab5f40cadbedea2f6342b93c245e91434
         driver: pass '-fPIC' option to assembler as well
     fixes shared libraries on sparc at least on linux.

     Properly fixes Issue #8857

     Signed-off-by: Sergei Trofimovich 
 }}}

 In commit fa31e8f4a0f853848d96549a429083941877bf8d:
 {{{
 Author: Sergei Trofimovich <>
 Date:   Sun Dec 14 14:30:12 2014 +0000

     powerpc: fix and enable shared libraries by default on linux

     Summary:
     And fix things all the way down to it. Namely:
         - remove 'r30' from free registers, it's an .LCTOC1 register
           for gcc. generated .plt stubs expect it to be initialised.
         - fix PicBase computation, which originally forgot to use 'tmp'
           reg in 'initializePicBase_ppc.fetchPC'
         - mark 'ForeighTarget's as implicitly using 'PicBase' register
           (see comment for details)
         - add 64-bit MO_Sub and test on alloclimit3/4 regtests
         - fix dynamic label offsets to match with .LCTOC1 offset

     Signed-off-by: Sergei Trofimovich 

     Test Plan: validate passes equal amount of vanilla/dyn tests

     Reviewers: simonmar, erikd, austin

     Reviewed By: erikd, austin

     Subscribers: carter, thomie

     Differential Revision: https://phabricator.haskell.org/D560

     GHC Trac Issues: #8024, #9831
 }}}

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Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8877#comment:2
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