On Thu, 7 Apr 2016, Josh Poimboeuf wrote:

To do that from C code, I guess we'd still need some arch-specific code
in an asm() statement to do the actual push?

This could potentially be worked around I believe (thinking for example of 
a onstack-allocated local variable with predefined contents that the 
compiler would not be allowed to optimize out; certainly not the only 
option).

Thanks,

-- 
Jiri Kosina
SUSE Labs