• Kirill Korotaev's avatar
    x86: mark read_crX() asm code as volatile · c1217a75
    Kirill Korotaev authored
    Some gcc versions (I checked at least 4.1.1 from RHEL5 & 4.1.2 from gentoo)
    can generate incorrect code with read_crX()/write_crX() functions mix up,
    due to cached results of read_crX().
    
    The small app for x8664 below compiled with -O2 demonstrates this
    (i686 does the same thing):
    c1217a75
system_64.h 4.49 KB