[Bug ld/24055] _bfd_xcoff_swap_aux_in smashes the stack

[wolfgang.thaller at gmx dot net]

https://sourceware.org/bugzilla/show_bug.cgi?id=24055

--- Comment #3 from Wolfgang Thaller <wolfgang.thaller at gmx dot net> ---
Comment on attachment 11507
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11507
Proposed patch

There are also some minor problems with your proposed patch:

* The assert checks < sizeof(AUXENT), but AUXENT is the external auxentm and by
definition AUXESZ == sizeof(AUXENT), so it looks like this assert will always
fail.

* The size for the memcpy is numaux * sizeof(AUXESZ), but AUXESZ is the size,
not the structure, so sizeof(AUXESZ) == sizeof(18) == sizeof(int) == 4.

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