[GHC] #4210: LLVM: Dynamic Library Support

[GHC]

#4210: LLVM: Dynamic Library Support
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        Reporter:  dterei            |            Owner:  dterei
            Type:  feature request   |           Status:  closed
        Priority:  low               |        Milestone:  7.6.2
       Component:  Compiler (LLVM)   |          Version:  6.13
      Resolution:  fixed             |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Runtime crash     |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Comment (by bgamari):

 Actually, this is quite perplexing as I would have expected the R_ARM_COPY
 relocation to have already been performed by ld.so by the time we get to
 executing code. That being said, in place of numerous data symbols I see
 what appears to be trampoline code,

 {{{
 #5  0xb61f8eaa in evacuate (p=0xb5cfd194) at rts/sm/Evac.c:384
 384       ASSERTM(LOOKS_LIKE_CLOSURE_PTR(q), "invalid closure, info=%p",
 q->header.info);
 (gdb) print q
 $1 = (StgClosure *) 0x16bf8 <Main_zdfEqModule_closure>
 (gdb) print *q
 $2 = {header = {info = 0x16d64
 <ghczmprim_GHCziClasses_DZCEq_static_info>}, payload = 0x16bfc
 <Main_zdfEqModule_closure+4>}
 (gdb) x /5i 0x16d64
    0x16d64 <ghczmprim_GHCziClasses_DZCEq_static_info>:  ldr     r3, [r5]
    0x16d68 <ghczmprim_GHCziClasses_DZCEq_static_info+4>:        add
 r7, r7, #1
    0x16d6c <ghczmprim_GHCziClasses_DZCEq_static_info+8>:        blx     r3
    0x16d70 <ghczmprim_GHCziClasses_DZCEq_static_info+12>:       bx      lr
    0x16d74:     movs    r0, r0
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/4210#comment:30>
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