Symbol: sib_base
sys/amd64/amd64/db_disasm.c
982
#define sib_base(rex, byte) (((byte)&0x7) | (rex & REX_B ? 0x8 : 0x0))
sys/i386/i386/db_disasm.c
877
#define sib_base(byte) ((byte)&0x7)