cvs commit: fptools/ghc/compiler/nativeGen PositionIndependentCode.hs PprMach.hs

[Wolfgang Thaller]

wolfgang    2005/01/14 14:12:57 PST

  Modified files:
    ghc/compiler/nativeGen PositionIndependentCode.hs PprMach.hs 
  Log:
  When -dynamic is specified but -fPIC is not, generate code that works around
  the ELF dynamic linker's misguided attempts to keep the main program unaware
  of dynamic linking.
  
  This involves generating indirect references and computed jumps for position
  dependent code, too, and making all constant data sections writable in order
  to persuade ld to not use "COPY" relocations.
  
  Tested on powerpc-linux; in theory, it also applies to i386-linux, but other
  parts of the PIC story are missing there.
  
  Note that the writable-const-data hack could be improved a bit by
  distinguishing between "really" constant data and "relocatable" constant data,
  which would be a nice thing to do anyway.
  
  Revision  Changes    Path
  1.6       +61 -37    fptools/ghc/compiler/nativeGen/PositionIndependentCode.hs
  1.4       +10 -1     fptools/ghc/compiler/nativeGen/PprMach.hs