Hi, I have checked that on gcc-4.5, I get a compilation error due to the following patch:
> > Neil Horman reported that on x86-64 the upper half of %rbx would get > > clobbered when the code was compiled PIC or PIE, because the > > i386-specific code to preserve %ebx was incorrectly compiled. > > > > However, the code is really way more complex than it needs to be. > > For one thing, the CPUID instruction only needs %eax (leaf) and %ecx > > (subleaf) as parameters, and since we are testing for bits, we might > > as well list the bits explicitly. Furthermore, we can use an array > > rather than doing a switch statement inside a structure. > > > > Reported-by: Neil Horman <nhorman at tuxdriver.com> > > Signed-off-by: H. Peter Anvin <hpa at linux.intel.com> > > Signed-off-by: Neil Horman <nhorman at tuxdriver.com> The compilation error is: /root/dpdk/lib/librte_eal/common/eal_common_cpuflags.c: In function 'rte_cpu_check_supported': /root/dpdk/lib/librte_eal/common/eal_common_cpuflags.c:271:48: error: array subscript is above array bounds make[7]: *** [eal_common_cpuflags.o] Error 1 This error is not present in newer gcc versions (4.6 and above). Thanks, Pablo de Lara DPDK SW Engineer -------------------------------------------------------------- Intel Shannon Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 Business address: Dromore House, East Park, Shannon, Co. Clare
