On 2014-07-04 11:38, Paolo Bonzini wrote: > Il 04/07/2014 11:33, Jan Kiszka ha scritto: >> >> The compiler is not aware of the fact that push/pop exists in this >> function and, thus, places the vmcs parameter on the stack without >> reserving the space. So the pushfq will overwrite the vmcs pointer and >> let the function fail. > > Is that just a missing "memory" clobber? push/pop clobbers memory. Nope, we would needs some clobber like "stack". I wonder what is required to use push in inline assembly safely? Jan -- Siemens AG, Corporate Technology, CT RTC ITP SES-DE Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
