[RTEMS Project] #4178: Resolve use of SUBALIGN in AArch64 under ILP32 multilib variant

[RTEMS trac]

#4178: Resolve use of SUBALIGN in AArch64 under ILP32 multilib variant
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  Reporter:  Kinsey Moore  |      Owner:  (none)
      Type:  task          |     Status:  new
  Priority:  normal        |  Milestone:
 Component:  arch/aarch64  |    Version:
  Severity:  normal        |   Keywords:
Blocked By:                |   Blocking:
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 Currently, the AArch64 ILP32 multilib variant is functional, but requires
 use of SUBALIGN to adjust the default alignment of the rtemsroset and
 rtemsrwset from 8 bytes to 4 bytes to match the pointer size. Without this
 alignment adjustment, execution of linker set based initializers on ILP32
 results in a crash due to the 4 bytes above the aligned pointer being
 treated as another initializer pointer.

 Though this is currently functional, it would be best to understand why
 this alignment change is required for AArch64 ILP32 when other
 architectures such as SPARC don't require this change to be explicitly
 made between their 32 and 64 bit variants.

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Ticket URL: <http://devel.rtems.org/ticket/4178>
RTEMS Project <http://www.rtems.org/>
RTEMS Project