sys_shmat         794 include/linux/syscalls.h asmlinkage long sys_shmat(int shmid, char __user *shmaddr, int shmflg);
sys_shmat         583 include/uapi/asm-generic/unistd.h __SC_COMP(__NR_shmat, sys_shmat, compat_sys_shmat)
sys_shmat         583 tools/include/uapi/asm-generic/unistd.h __SC_COMP(__NR_shmat, sys_shmat, compat_sys_shmat)