On 24 February 2015 at 23:53, Edward Nevill <edward.nev...@linaro.org> wrote:
> However, there is a problem with this because gcc may store integer value in
> floating point registers around a function call.
>
> So, I have no way of knowing whether it is actually necessary to save/restore
> floating point context.
>
> Even worse applications using Boost.Context may be completely borken if they
> assume it is safe to call jump_context with save_fp == 0.
>
> Any suggestions?
It sounds to me like:
(1) any application which doesn't call with save_fp true
is broken
(2) the API is badly designed and the save_fp argument
should be deprecated/removed
(3) implementations should ignore save_fp and always
save all the registers which the calling convention
requires to be saved
(4) this is reinventing the getcontext/setcontext wheel,
badly...
-- PMM
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