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Subject: [Bug target/104816] -fcf-protection=branch should generate endbr
 instead of notrack jumps
Date: Mon, 07 Mar 2022 14:06:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104816

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-03-07

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Richard Biener from comment #2)
> Documentation should probably also amended to reflect this limitation (or
> -fcf-protection=3Dbranch should implicitely disable jump-tables).

We should document this limitation and update -fno-jump-tables documentatio=
n:

'-fno-jump-tables'
     Do not use jump tables for switch statements even where it would be
     more efficient than other code generation strategies.  This option
     is of use in conjunction with '-fpic' or '-fPIC' for building code
     that forms part of a dynamic linker and cannot reference the
     address of a jump table.  On some targets, jump tables do not
     require a GOT and this option is not needed.=