[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:8 nomeata]:
 > > Does debian disable dynamic GHC by default as `DYNAMIC_GHC_PROGRAMS =
 NO`?
 >
 > No (`ldd /usr/lib/ghc/bin/ghc` lists various `libHS...` libraries).
 Are you using secure PLT? This might be done as part of hardening.

 In the ABI specs p 108 relocations {{{R_PPC_REL16*}}}:
 ''These relocation types are used to compute the distance between a symbol
 address and the current address. These relocations types are used under
 the '''Secure-PLT ABI''' to compute the address of the .got section
 because the link editor knows the fixed distance between the
 _GLOBAL_OFFSET_TABLE_ symbol and an address in the .text section.''

 The specs referred to above is: Power Architecture® 32-bit Application
 Binary Interface Supplement 1.0 - Linux® & Embedded

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10402#comment:10>
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