diff --git a/lib/libc/gen/Makefile.inc b/lib/libc/gen/Makefile.inc
--- a/lib/libc/gen/Makefile.inc
+++ b/lib/libc/gen/Makefile.inc
@@ -101,6 +101,7 @@
 	lockf.c \
 	lrand48.c \
 	memalign.c \
+	memfd_create.c \
 	mrand48.c \
 	nftw.c \
 	nftw-compat11.c \
diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map
--- a/lib/libc/gen/Symbol.map
+++ b/lib/libc/gen/Symbol.map
@@ -433,6 +433,7 @@
 	eventfd_write;
 	getlogin_r;
 	memalign;
+	memfd_create;
 	pthread_getname_np;
 	scandir_b;
 	sigandset;
diff --git a/lib/libc/sys/shm_open.c b/lib/libc/gen/memfd_create.c
copy from lib/libc/sys/shm_open.c
copy to lib/libc/gen/memfd_create.c
--- a/lib/libc/sys/shm_open.c
+++ b/lib/libc/gen/memfd_create.c
@@ -34,50 +34,15 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <limits.h>
-#include <stdlib.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
 #include "libc_private.h"
 
-__weak_reference(shm_open, _shm_open);
-__weak_reference(shm_open, __sys_shm_open);
-
 #define	MEMFD_NAME_PREFIX	"memfd:"
 
-int
-shm_open(const char *path, int flags, mode_t mode)
-{
-
-	return (__sys_shm_open2(path, flags | O_CLOEXEC, mode, 0, NULL));
-}
-
-int
-shm_create_largepage(const char *path, int flags, int psind, int alloc_policy,
-    mode_t mode)
-{
-	struct shm_largepage_conf slc;
-	int error, fd, saved_errno;
-
-	fd = __sys_shm_open2(path, flags | O_CREAT, mode, SHM_LARGEPAGE, NULL);
-	if (fd == -1)
-		return (-1);
-
-	memset(&slc, 0, sizeof(slc));
-	slc.psind = psind;
-	slc.alloc_policy = alloc_policy;
-	error = ioctl(fd, FIOSSHMLPGCNF, &slc);
-	if (error == -1) {
-		saved_errno = errno;
-		close(fd);
-		errno = saved_errno;
-		return (-1);
-	}
-	return (fd);
-}
-
 /*
  * The path argument is passed to the kernel, but the kernel doesn't currently
  * do anything with it.  Linux exposes it in linprocfs for debugging purposes
diff --git a/lib/libc/sys/Symbol.map b/lib/libc/sys/Symbol.map
--- a/lib/libc/sys/Symbol.map
+++ b/lib/libc/sys/Symbol.map
@@ -409,7 +409,6 @@
 	fhreadlink;
 	getfhat;
 	funlinkat;
-	memfd_create;
 	shm_create_largepage;
 	shm_rename;
 };
diff --git a/lib/libc/sys/shm_open.c b/lib/libc/sys/shm_open.c
--- a/lib/libc/sys/shm_open.c
+++ b/lib/libc/sys/shm_open.c
@@ -34,9 +34,6 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <limits.h>
-#include <stdlib.h>
-#include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 
@@ -45,12 +42,9 @@
 __weak_reference(shm_open, _shm_open);
 __weak_reference(shm_open, __sys_shm_open);
 
-#define	MEMFD_NAME_PREFIX	"memfd:"
-
 int
 shm_open(const char *path, int flags, mode_t mode)
 {
-
 	return (__sys_shm_open2(path, flags | O_CLOEXEC, mode, 0, NULL));
 }
 
@@ -77,90 +71,3 @@
 	}
 	return (fd);
 }
-
-/*
- * The path argument is passed to the kernel, but the kernel doesn't currently
- * do anything with it.  Linux exposes it in linprocfs for debugging purposes
- * only, but our kernel currently will not do the same.
- */
-int
-memfd_create(const char *name, unsigned int flags)
-{
-	char memfd_name[NAME_MAX + 1];
-	size_t namelen, *pgs, pgsize;
-	struct shm_largepage_conf slc;
-	int error, fd, npgs, oflags, pgidx, saved_errno, shmflags;
-
-	if (name == NULL) {
-		errno = EBADF;
-		return (-1);
-	}
-	namelen = strlen(name);
-	if (namelen + sizeof(MEMFD_NAME_PREFIX) - 1 > NAME_MAX) {
-		errno = EINVAL;
-		return (-1);
-	}
-	if ((flags & ~(MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_HUGETLB |
-	    MFD_HUGE_MASK)) != 0) {
-		errno = EINVAL;
-		return (-1);
-	}
-	/* Size specified but no HUGETLB. */
-	if ((flags & MFD_HUGE_MASK) != 0 && (flags & MFD_HUGETLB) == 0) {
-		errno = EINVAL;
-		return (-1);
-	}
-
-	/* We've already validated that we're sufficiently sized. */
-	snprintf(memfd_name, NAME_MAX + 1, "%s%s", MEMFD_NAME_PREFIX, name);
-	oflags = O_RDWR;
-	shmflags = 0;
-	if ((flags & MFD_CLOEXEC) != 0)
-		oflags |= O_CLOEXEC;
-	if ((flags & MFD_ALLOW_SEALING) != 0)
-		shmflags |= SHM_ALLOW_SEALING;
-	if ((flags & MFD_HUGETLB) != 0)
-		shmflags |= SHM_LARGEPAGE;
-	else
-		shmflags |= SHM_GROW_ON_WRITE;
-	fd = __sys_shm_open2(SHM_ANON, oflags, 0, shmflags, memfd_name);
-	if (fd == -1 || (flags & MFD_HUGETLB) == 0)
-		return (fd);
-
-	pgs = NULL;
-	npgs = getpagesizes(NULL, 0);
-	if (npgs == -1)
-		goto clean;
-	pgs = calloc(npgs, sizeof(size_t));
-	if (pgs == NULL)
-		goto clean;
-	error = getpagesizes(pgs, npgs);
-	if (error == -1)
-		goto clean;
-	pgsize = (size_t)1 << ((flags & MFD_HUGE_MASK) >> MFD_HUGE_SHIFT);
-	for (pgidx = 0; pgidx < npgs; pgidx++) {
-		if (pgsize == pgs[pgidx])
-			break;
-	}
-	if (pgidx == npgs) {
-		errno = EOPNOTSUPP;
-		goto clean;
-	}
-	free(pgs);
-	pgs = NULL;
-
-	memset(&slc, 0, sizeof(slc));
-	slc.psind = pgidx;
-	slc.alloc_policy = SHM_LARGEPAGE_ALLOC_DEFAULT;
-	error = ioctl(fd, FIOSSHMLPGCNF, &slc);
-	if (error == -1)
-		goto clean;
-	return (fd);
-
-clean:
-	saved_errno = errno;
-	close(fd);
-	free(pgs);
-	errno = saved_errno;
-	return (-1);
-}