Re: [PATCH 6/13] mips musl support

[Jeff Law <law at redhat dot com>]

On 05/08/2015 10:50 AM, Joseph Myers wrote:
> Note that however the dynamic linker does properly need to save and
> restore call-clobbered registers used for argument passing (because of
> IFUNCs, user-provided malloc, audit hooks etc. that might affect them even
> if the dynamic linker itself doesn't); see
> <https://sourceware.org/ml/libc-alpha/2014-01/msg00673.html>.  So any
> floating-point-agnostic dynamic linker would, if fixing the bugs around
> not saving / restoring such registers, need to have runtime-conditional
> code to save and restore them rather than simple compile-time
> conditionals.
Right.  So there has to be some reasonable cost way to find out if you 
have FPU registers at runtime, then select between the code paths at 
runtime.


Jeff