PR_PMLEN_SHIFT
# define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT)
# define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT)
# define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT)
#ifndef PR_PMLEN_SHIFT
#define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT)
ret = prctl(PR_SET_TAGGED_ADDR_CTRL, request << PR_PMLEN_SHIFT, 0, 0, 0);
pmlen = (ret & PR_PMLEN_MASK) >> PR_PMLEN_SHIFT;
arg = pmlen << PR_PMLEN_SHIFT | tagged_addr_abi;