[Bug gas/23954] Use of unknown relocation function causes segfault

[wilson at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=23954

Jim Wilson <wilson at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2018-12-08
           Assignee|unassigned at sourceware dot org   |wilson at gcc dot 
gnu.org
     Ever confirmed|0                           |1

--- Comment #1 from Jim Wilson <wilson at gcc dot gnu.org> ---
The problem is the extra register, not the unknown relocation function.  I get
the same error with just
        auipc x0, x1
The problem seems to be limited to auipc and lui, which aren't properly
checking their arguments.  The second arg can be a constant or a %*hi operator,
but can't be a register.  There is no check to fail when it is a register
though.

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