Re: [Xen-devel] [PATCH XTF 2/4] build: Drop unnecessary register clobbers

2017-09-28 Thread Jan Beulich
>>> On 28.09.17 at 12:59, wrote: > The code in question is executing __HYPERVISOR_multicall which is 2-parameter > hypercall, which means that args 3-6 are preserved (as opposed to the > arguments in the multicall_entry_t list, which are clobbered). > > GCC 4.4 in CentOS 6 can't cope with the ebp

[Xen-devel] [PATCH XTF 2/4] build: Drop unnecessary register clobbers

2017-09-28 Thread Andrew Cooper
The code in question is executing __HYPERVISOR_multicall which is 2-parameter hypercall, which means that args 3-6 are preserved (as opposed to the arguments in the multicall_entry_t list, which are clobbered). GCC 4.4 in CentOS 6 can't cope with the ebp clobber. Reported-by: Glenn Enright Signe