[GHC] #10402: powerpc: unhandled ELF relocation(RelA) type 252

[GHC]

#10402: powerpc: unhandled ELF relocation(RelA) type 252
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        Reporter:  cjwatson        |                   Owner:  simonmar
            Type:  bug             |                  Status:  patch
        Priority:  normal          |               Milestone:  7.10.2
       Component:  Runtime System  |                 Version:  7.8.4
      Resolution:                  |                Keywords:
Operating System:  Linux           |            Architecture:  powerpc
 Type of failure:  Runtime crash   |               Test Case:
      Blocked By:                  |                Blocking:
 Related Tickets:                  |  Differential Revisions:
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Comment (by trommler):

 Replying to [comment:7 slyfox]:
 > From the above I suspect '''R_PPC_PLTREL24''' might require +0x8000
 offset
 > and should be PLT relative. I'll try to look at it tomorrow.
 From the specs:
 ''This relocation indicates that reference to a symbol should be resolved
 through a call to the symbol’s Procedure Linkage Table entry. Additionally
 it instructs the link editor to build a procedure linkage table for the
 executable or shared object if one is not created.''
 and under heading '''ATR-BSS-PLT''':
 ''Under the BSS-PLT ABI this relocation type may be implemented as a
 direct branch and link into the executable PLT slot which holds the
 absolute address (after resolution) of the specified symbol. There is an
 implicit assumption that the Procedure Linkage Table for a shared object
 or executable will be within ± 32 MB of an instruction that branches to
 it.''

 I guess that debian is doing the latter so no PLT entry needs to be
 generated by the linker which would be {{{rts/Linker.c}}}.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10402#comment:9>
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