[GHC] #9920: Segfault in arm binary

[GHC]

#9920: Segfault in arm binary
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              Reporter:  erikd             |            Owner:
                  Type:  bug               |           Status:  new
              Priority:  normal            |        Milestone:
             Component:  Compiler          |          Version:  7.11
            Resolution:                    |         Keywords:
      Operating System:  Unknown/Multiple  |     Architecture:  arm
       Type of failure:  Runtime crash     |       Difficulty:  Unknown
             Test Case:                    |       Blocked By:
              Blocking:                    |  Related Tickets:
Differential Revisions:                    |
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Comment (by erikd):

 The function `stg_init_finish` is defined in `rts/StgStartup.cmm` as:

 {{{
 stg_init_finish /* no args: explicit stack layout */
 {
   jump StgReturn [];
 }
 }}}

 and the generated assembly (from a different binary) looks like:

 {{{
 0x211fc4 <stg_init_finish$def>           ldr    r5, [r4, #792]  ; 0x318
 0x211fc8 <stg_init_finish$def+4>         ldr    r0, [r5], #4
 }}}

 but when I step through the code, it looks like the first of these two
 instructions are not executed. Howver, if I set a breakpoint at address
 `0x211fc4` it does indeed halt there.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9920#comment:3>
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