SIGILL in rte_cpu_get_flag_enabled / RTE_CPUFLAG_RTM

[Bernd Schubert]

Hello,

I'm trying to compile our tools on an older lab system and get

Program received signal SIGILL, Illegal instruction.
0x00007ffff434c766 in rte_cpu_get_flag_enabled (feature=feature at entry=RTE_CPUFLAG_RTM) at ../lib/eal/x86/rte_cpuflags.c:173
173		return (regs[feat->reg] >> feat->bit) & 1;
(gdb) bt
#0  0x00007ffff434c766 in rte_cpu_get_flag_enabled (feature=feature at entry=RTE_CPUFLAG_RTM) at ../lib/eal/x86/rte_cpuflags.c:173
#1  0x00007ffff3ffb572 in rte_rtm_init () at ../lib/eal/x86/rte_spinlock.c:14
##2  0x00007ffff7fc947e in call_init (l=<optimized out>, argc=argc at entry=1, argv=argv at entry=0x7fffffffe088, env=env at entry=0x7fffffffe098)
     at ./elf/dl-init.c:70
#3  0x00007ffff7fc9568 in call_init (env=0x7fffffffe098, argv=0x7fffffffe088, argc=1, l=<optimized out>) at ./elf/dl-init.c:33
#4  _dl_init (main_map=0x7ffff7ffe2e0, argc=1, argv=0x7fffffffe088, env=0x7fffffffe098) at ./elf/dl-init.c:117
#5  0x00007ffff7fe32ea in _dl_start_user () from /lib64/ld-linux-x86-64.so.2


This already has been reported here
https://inbox.dpdk.org/users/C7FF2508-D633-404E-95AF-5F604D8E8E4B@intel.com/t/
but I don't see a solution there. It just ends up asking for the line numbers.
Well, the line is


      __cpuid_count(feat->leaf, feat->subleaf,
              regs[RTE_REG_EAX], regs[RTE_REG_EBX],
              regs[RTE_REG_ECX], regs[RTE_REG_EDX]);

     /* check if the feature is enabled */
     return (regs[feat->reg] >> feat->bit) & 1; ====> line 173


Maybe this should catch SIGILL?



Thanks,
Bernd