[GHC] #5052: stdcall on OS X is broken

[GHC]

#5052: stdcall on OS X is broken
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    Reporter:  igloo     |        Owner:              
        Type:  bug       |       Status:  patch       
    Priority:  normal    |    Milestone:              
   Component:  Compiler  |      Version:  7.0.2       
    Keywords:            |     Testcase:              
   Blockedby:            |   Difficulty:              
          Os:  MacOS X   |     Blocking:              
Architecture:  x86       |      Failure:  None/Unknown
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Changes (by batterseapower):

  * status:  new => patch


Comment:

 I've attached a ticket that seems to fix this bug for me. The problem is
 that the codegen for foreign calls makes sure the stack is 16-byte aligned
 on OS X by pushing some padding. In the case where the foreign call is
 cdecl, that padding gets popped after the call, but if the convention is
 stdcall then it doesn't generate any popping code at all. However, this is
 incorrect because the stdcall only promises to pop the arguments, not the
 padding.

 The fix is to generate code to pop the padding (if any) on OS X.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5052#comment:3>
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