Repository : ssh://darcs.haskell.org//srv/darcs/ghc On branch : master
http://hackage.haskell.org/trac/ghc/changeset/cfbf0eb134efd1c5d9a589f6ae2139d7fad60581 >--------------------------------------------------------------- commit cfbf0eb134efd1c5d9a589f6ae2139d7fad60581 Author: Duncan Coutts <[email protected]> Date: Thu May 12 16:25:41 2011 +0100 Make the GHCi linker handle partially stripped object files (#5004) When you use 'strip --strip-unneeded' on a ELF format .o or .a file, if the object file has no global/exported symbols then 'strip' ends up removing the symbol table entirely. Previously the GHCi linker assumed there would always be exactly one symbol table and exactly one string table. In fact, in ELF object files there is no such limitation, instead each section points to the other sections it needs, in particular relocation sections have a link to the symbol table section they use and symbol table sections have a link to the corresponding string table. So instead of assuming there will always be a global symbol and string table, all we have to do is validate and follow these links. Then, when we encounter an empty object file that has no symbols then we handle it correctly, because since it's empty we never process any relocations and so never have to follow any links to non-existant symbol tables. Also, in the case where an object is fully stripped, we can now detect this more reliably and emit a more helpful error message, e.g: libHSghc-7.1.20110509.a(DsMeta.o): relocation section #2 has no symbol table This object file has probably been fully striped. Such files cannot be linked. rts/Linker.c | 163 +++++++++++++++++++++++++++++++-------------------------- 1 files changed, 89 insertions(+), 74 deletions(-) Diff suppressed because of size. To see it, use: git show cfbf0eb134efd1c5d9a589f6ae2139d7fad60581 _______________________________________________ Cvs-ghc mailing list [email protected] http://www.haskell.org/mailman/listinfo/cvs-ghc
