diff --git a/GNUmakefile b/GNUmakefile
index 574e3ed..95691c6 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -347,7 +347,7 @@ dns_nd6.o fmt_xlong.o scan_xlong.o fmt_ip6_flat.o $(TEXTCODE_OBJS): haveinline.h
 
 iob_send.o scan_ip6if.o: havealloca.h
 
-dep: haveip6.h haven2i.h havesl.h haveinline.h iopause.h select.h haveepoll.h havekqueue.h havedevpoll.h havescope.h havesigio.h havebsdsf.h havesendfile.h havealloca.h haveuint128.h entities.h
+dep: haveip6.h haven2i.h havesl.h haveinline.h iopause.h select.h haveepoll.h havekqueue.h havedevpoll.h havescope.h havesigio.h havebsdsf.h havesendfile.h havealloca.h haveuint128.h entities.h havepread.h
 	$(CC) -I. -MM `ls */*.c | grep -v test` t.c | sed -e 's@ \./@ @g' > dep
 
 libdep:
diff --git a/Makefile b/Makefile
index c910d2a..7b4f780 100644
--- a/Makefile
+++ b/Makefile
@@ -402,6 +402,7 @@ iob_write.o: io/iob_write.c iob_internal.h iob.h io.h uint64.h taia.h \
  tai.h uint32.h array.h
 mmap_private.o: mmap/mmap_private.c open.h mmap.h
 mmap_read.o: mmap/mmap_read.c open.h mmap.h
+mmap_readat.o: mmap/mmap_readat.c open.h mmap.h
 mmap_shared.o: mmap/mmap_shared.c open.h mmap.h
 mmap_unmap.o: mmap/mmap_unmap.c open.h mmap.h
 imult16.o: mult/imult16.c uint16.h
@@ -711,7 +712,7 @@ STRALLOC_OBJS=stralloc_append.o stralloc_cat.o stralloc_catb.o stralloc_catlong0
 UNIX_OBJS=iopause.o ndelay_off.o ndelay_on.o winsock2errno.o 
 SOCKET_OBJS=fmt_ip4.o fmt_ip6.o fmt_ip6_flat.o fmt_ip6c.o fmt_ip6if.o fmt_ip6ifc.o init.o scan_ip4.o scan_ip6.o scan_ip6_flat.o scan_ip6if.o socket_accept4.o socket_accept6.o socket_bind4.o socket_bind4_reuse.o socket_bind6.o socket_bind6_reuse.o socket_broadcast.o socket_connect4.o socket_connect6.o socket_connected.o socket_deferaccept.o socket_fastopen.o socket_fastopen_connect4.o socket_fastopen_connect6.o socket_getifidx.o socket_getifname.o socket_ip4loopback.o socket_listen.o socket_local4.o socket_local6.o socket_mchopcount6.o socket_mcjoin4.o socket_mcjoin6.o socket_mcleave4.o socket_mcleave6.o socket_mcloop4.o socket_mcloop6.o socket_mcttl4.o socket_noipv6.o socket_quickack.o socket_recv4.o socket_recv6.o socket_remote4.o socket_remote6.o socket_sctp4.o socket_sctp4b.o socket_sctp6.o socket_sctp6b.o socket_send4.o socket_send6.o socket_tcp4.o socket_tcp4b.o socket_tcp6.o socket_tcp6b.o socket_tryreservein.o socket_udp4.o socket_udp6.o socket_v4mappedprefix.o socket_v6any.o socket_v6loopback.o 
 BUFFER_OBJS=buffer_0.o buffer_0small.o buffer_1.o buffer_1small.o buffer_2.o buffer_close.o buffer_feed.o buffer_flush.o buffer_free.o buffer_fromarray.o buffer_frombuf.o buffer_fromsa.o buffer_get.o buffer_get_new_token_sa.o buffer_get_new_token_sa_pred.o buffer_get_token.o buffer_get_token_pred.o buffer_get_token_sa.o buffer_get_token_sa_pred.o buffer_getc.o buffer_getline.o buffer_getline_sa.o buffer_getn.o buffer_getnewline_sa.o buffer_init.o buffer_init_free.o buffer_mmapread.o buffer_munmap.o buffer_peek.o buffer_put.o buffer_put8long.o buffer_putalign.o buffer_puterror.o buffer_puterror2.o buffer_putflush.o buffer_putlong.o buffer_putlonglong.o buffer_putm_internal.o buffer_putm_internal_flush.o buffer_putnlflush.o buffer_puts.o buffer_putsa.o buffer_putsaflush.o buffer_putsalign.o buffer_putsflush.o buffer_putspace.o buffer_putulong.o buffer_putulonglong.o buffer_putxlong.o buffer_seek.o buffer_stubborn.o buffer_stubborn2.o buffer_tosa.o errmsg_iam.o errmsg_info.o errmsg_infosys.o errmsg_puts.o errmsg_warn.o errmsg_warnsys.o errmsg_write.o 
-MMAP_OBJS=mmap_private.o mmap_read.o mmap_shared.o mmap_unmap.o 
+MMAP_OBJS=mmap_private.o mmap_read.o mmap_readat.o mmap_shared.o mmap_unmap.o 
 TAIA_OBJS=taia_add.o taia_addsec.o taia_approx.o taia_frac.o taia_half.o taia_less.o taia_now.o taia_pack.o taia_sub.o taia_tai.o taia_uint.o taia_unpack.o 
 TAI_OBJS=tai_add.o tai_now.o tai_pack.o tai_sub.o tai_uint.o tai_unpack.o 
 DNS_OBJS=dns_dfd.o dns_domain.o dns_dtda.o dns_ip.o dns_ip6.o dns_ipq.o dns_ipq6.o dns_mx.o dns_name.o dns_nd.o dns_nd6.o dns_packet.o dns_random.o dns_rcip.o dns_rcrw.o dns_resolve.o dns_sortip.o dns_sortip6.o dns_transmit.o dns_txt.o 
@@ -933,7 +934,7 @@ dns_nd6.o fmt_xlong.o scan_xlong.o fmt_ip6_flat.o $(TEXTCODE_OBJS): haveinline.h
 
 iob_send.o scan_ip6if.o: havealloca.h
 
-dep: haveip6.h haven2i.h havesl.h haveinline.h iopause.h select.h haveepoll.h havekqueue.h havedevpoll.h havescope.h havesigio.h havebsdsf.h havesendfile.h havealloca.h haveuint128.h entities.h
+dep: haveip6.h haven2i.h havesl.h haveinline.h iopause.h select.h haveepoll.h havekqueue.h havedevpoll.h havescope.h havesigio.h havebsdsf.h havesendfile.h havealloca.h haveuint128.h entities.h havepread.h
 	$(CC) -I. -MM `ls */*.c | grep -v test` t.c | sed -e 's@ \./@ @g' > dep
 
 libdep: