head broken on openbsd
dons at galois.com
Wed Oct 31 17:54:12 EDT 2007
> The change to use remap in Linker.c has broken the mmap Linker.c
> implementation on OpenBSD, and other BSDs.
> #ifndef linux_HOST_OS /* mremap is a linux extension */
> #error ocAllocateSymbolExtras doesnt want USE_MMAP to be defined
> Do we know why this was done? USE_MMAP worked perfectly well until
> recently, perhaps the remap stuff could be ifdeffed instead?
Thu Oct 18 05:52:20 PDT 2007 Simon Marlow <simonmar at microsoft.com>
* add PIC relocations for x86_64, and use a simpler hack in place of x86_64_high_symbol()
This is Wolfgang Thaller's patch sent to cvs-ghc recently, with extra
commentary by me. It turns out that this patch is not just a cleanup,
it is also necessary for GHCi to work on x86_64 with shared libraries,
because previously lookupSymbol() was creating jump-table entries for
all symbols looked up that resolved outside 2Gb, whereas Wolfgang's
version only generates jump-table entries for 32-bit symbol references
in object code that we load.
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