diff --git a/cr-restore.c b/cr-restore.c
index b4e489a73..26dbe539f 100644
--- a/cr-restore.c
+++ b/cr-restore.c
@@ -215,7 +215,7 @@ static int map_private_vma(pid_t pid, struct vma_area *vma, void *tgt_addr,
 
 		if (p->vma.end == vma->vma.end &&
 		    p->vma.start == vma->vma.start) {
-			pr_info("COW 0x%016lx-0x%016lx 0x%016lx vma\n",
+			pr_info("COW 0x%016"PRIx64"-0x%016"PRIx64" 0x%016"PRIx64" vma\n",
 				vma->vma.start, vma->vma.end, vma->vma.pgoff);
 			paddr = (void *) vma_premmaped_start(&p->vma);
 			break;
@@ -226,7 +226,7 @@ static int map_private_vma(pid_t pid, struct vma_area *vma, void *tgt_addr,
 	*pvma = p;
 
 	if (paddr == NULL) {
-		pr_info("Map 0x%016lx-0x%016lx 0x%016lx vma\n",
+		pr_info("Map 0x%016"PRIx64"-0x%016"PRIx64" 0x%016"PRIx64" vma\n",
 			vma->vma.start, vma->vma.end, vma->vma.pgoff);
 
 		addr = mmap(tgt_addr, vma_entry_len(&vma->vma),
@@ -472,7 +472,7 @@ static int open_vmas(int pid)
 		if (!(vma_entry_is(&vma->vma, VMA_AREA_REGULAR)))
 			continue;
 
-		pr_info("Opening 0x%016lx-0x%016lx 0x%016lx (%x) vma\n",
+		pr_info("Opening 0x%016"PRIx64"-0x%016"PRIx64" 0x%016"PRIx64" (%x) vma\n",
 				vma->vma.start, vma->vma.end,
 				vma->vma.pgoff, vma->vma.status);
 
diff --git a/cr-show.c b/cr-show.c
index 8ad2361c5..57bdbefaf 100644
--- a/cr-show.c
+++ b/cr-show.c
@@ -232,7 +232,7 @@ void show_pages(int fd_pages, struct cr_options *o)
 					goto out;
 				}
 
-				pr_msg("0x%16lx ", e.va);
+				pr_msg("0x%16"PRIx64" ", e.va);
 			}
 			pr_msg("\n");
 		}
@@ -306,19 +306,19 @@ static inline char *task_state_str(int state)
 static void show_core_regs(UserX86RegsEntry *regs)
 {
 #define pr_regs4(s, n1, n2, n3, n4)	\
-	pr_msg("\t%8s: 0x%-16lx "	\
-	       "%8s: 0x%-16lx "		\
-	       "%8s: 0x%-16lx "		\
-	       "%8s: 0x%-16lx\n",	\
+	pr_msg("\t%8s: 0x%-16"PRIx64" "	\
+	       "%8s: 0x%-16"PRIx64" "	\
+	       "%8s: 0x%-16"PRIx64" "	\
+	       "%8s: 0x%-16"PRIx64"\n",	\
 	       #n1, s->n1,		\
 	       #n2, s->n2,		\
 	       #n3, s->n3,		\
 	       #n4, s->n4)
 
 #define pr_regs3(s, n1, n2, n3)		\
-	pr_msg("\t%8s: 0x%-16lx "	\
-	       "%8s: 0x%-16lx "		\
-	       "%8s: 0x%-16lx\n",	\
+	pr_msg("\t%8s: 0x%-16"PRIx64" "	\
+	       "%8s: 0x%-16"PRIx64" "	\
+	       "%8s: 0x%-16"PRIx64"\n",	\
 	       #n1, s->n1,		\
 	       #n2, s->n2,		\
 	       #n3, s->n3)
@@ -341,7 +341,7 @@ void show_thread_info(ThreadInfoX86 *thread_info)
 		return;
 
 	pr_msg("\t---[ Thread info ]---\n");
-	pr_msg("\tclear_tid_addr:  0x%lx\n", thread_info->clear_tid_addr);
+	pr_msg("\tclear_tid_addr:  0x%"PRIx64"\n", thread_info->clear_tid_addr);
 	pr_msg("\n");
 
 	show_core_regs(thread_info->gpregs);
diff --git a/eventfd.c b/eventfd.c
index 1a8fca356..9854a7074 100644
--- a/eventfd.c
+++ b/eventfd.c
@@ -40,7 +40,7 @@ int is_eventfd_link(int lfd)
 
 static void pr_info_eventfd(char *action, EventfdFileEntry *efe)
 {
-	pr_info("%s: id %#08x flags %#04x counter %#016lx\n",
+	pr_info("%s: id %#08x flags %#04x counter %#016"PRIx64"\n",
 		action, efe->id, efe->flags, efe->counter);
 }
 
diff --git a/eventpoll.c b/eventpoll.c
index 3c77bc622..ed09190fc 100644
--- a/eventpoll.c
+++ b/eventpoll.c
@@ -47,7 +47,7 @@ int is_eventpoll_link(int lfd)
 
 static void pr_info_eventpoll_tfd(char *action, EventpollTfdEntry *e)
 {
-	pr_info("%seventpoll-tfd: id %#08x tfd %#08x events %#08x data %#016lx\n",
+	pr_info("%seventpoll-tfd: id %#08x tfd %#08x events %#08x data %#016"PRIx64"\n",
 		action, e->id, e->tfd, e->events, e->data);
 }
 
diff --git a/files-reg.c b/files-reg.c
index 66dfadd4b..1d48d3c6a 100644
--- a/files-reg.c
+++ b/files-reg.c
@@ -288,7 +288,7 @@ static int dump_ghost_remap(char *path, const struct stat *st, int lfd, u32 id)
 	pr_info("Dumping ghost file for fd %d id %#x\n", lfd, id);
 
 	if (st->st_size > MAX_GHOST_FILE_SIZE) {
-		pr_err("Can't dump ghost file %s of %lu size\n",
+		pr_err("Can't dump ghost file %s of %"PRIu64" size\n",
 				path, st->st_size);
 		return -1;
 	}
diff --git a/fsnotify.c b/fsnotify.c
index 37fb84ac7..41d9a86f0 100644
--- a/fsnotify.c
+++ b/fsnotify.c
@@ -102,9 +102,9 @@ static int dump_inotify_entry(union fdinfo_entries *e, void *arg)
 	InotifyWdEntry *we = &e->ify;
 
 	we->id = *(u32 *)arg;
-	pr_info("wd: wd 0x%08x s_dev 0x%08x i_ino 0x%16lx mask 0x%08x\n",
+	pr_info("wd: wd 0x%08x s_dev 0x%08x i_ino 0x%16"PRIx64" mask 0x%08x\n",
 			we->wd, we->s_dev, we->i_ino, we->mask);
-	pr_info("\t[fhandle] bytes 0x%08x type 0x%08x __handle 0x%016lx:0x%016lx\n",
+	pr_info("\t[fhandle] bytes 0x%08x type 0x%08x __handle 0x%016"PRIx64":0x%016"PRIx64"\n",
 			we->f_handle->bytes, we->f_handle->type,
 			we->f_handle->handle[0], we->f_handle->handle[1]);
 	return pb_write_one(fdset_fd(glob_fdset, CR_FD_INOTIFY_WD), we, PB_INOTIFY_WD);
@@ -146,10 +146,10 @@ static int dump_fanotify_entry(union fdinfo_entries *e, void *arg)
 
 		BUG_ON(!fme->ie);
 
-		pr_info("mark: s_dev 0x%08x i_ino 0x%016lx mask 0x%08x\n",
+		pr_info("mark: s_dev 0x%08x i_ino 0x%016"PRIx64" mask 0x%08x\n",
 			fme->s_dev, fme->ie->i_ino, fme->mask);
 
-		pr_info("\t[fhandle] bytes 0x%08x type 0x%08x __handle 0x%016lx:0x%016lx\n",
+		pr_info("\t[fhandle] bytes 0x%08x type 0x%08x __handle 0x%016"PRIx64":0x%016"PRIx64"\n",
 			fme->ie->f_handle->bytes, fme->ie->f_handle->type,
 			fme->ie->f_handle->handle[0], fme->ie->f_handle->handle[1]);
 	}
diff --git a/ipc_ns.c b/ipc_ns.c
index c94b3b5f4..a5942fd65 100644
--- a/ipc_ns.c
+++ b/ipc_ns.c
@@ -156,7 +156,7 @@ static int dump_ipc_sem(int fd)
 
 static void pr_info_ipc_msg(int nr, const IpcMsg *msg)
 {
-	print_on_level(LOG_INFO, "  %-5d: type: %-20ld size: %-10d\n",
+	print_on_level(LOG_INFO, "  %-5d: type: %-20"PRId64" size: %-10d\n",
 		       nr++, msg->mtype, msg->msize);
 }
 
@@ -281,7 +281,7 @@ static int dump_ipc_msg(int fd)
 static void pr_info_ipc_shm(const IpcShmEntry *shm)
 {
 	pr_ipc_desc_entry(LOG_INFO, shm->desc);
-	print_on_level(LOG_INFO, "size: %-10lu\n", shm->size);
+	print_on_level(LOG_INFO, "size: %-10"PRIu64"\n", shm->size);
 }
 
 static int ipc_sysctl_req(IpcVarEntry *e, int op)
diff --git a/parasite-syscall.c b/parasite-syscall.c
index af71878a2..c3510d87f 100644
--- a/parasite-syscall.c
+++ b/parasite-syscall.c
@@ -546,7 +546,7 @@ int parasite_dump_pages_seized(struct parasite_ctl *ctl, struct list_head *vma_a
 			goto out_fini;
 		}
 
-		pr_info("vma %lx-%lx  dumped: %lu pages %lu skipped %lu total\n",
+		pr_info("vma %"PRIx64"-%"PRIx64"  dumped: %lu pages %lu skipped %lu total\n",
 				vma_area->vma.start, vma_area->vma.end,
 				parasite_dumppages->nrpages_dumped,
 				parasite_dumppages->nrpages_skipped,
diff --git a/pie/restorer.c b/pie/restorer.c
index 9ad41a372..b4f1ba500 100644
--- a/pie/restorer.c
+++ b/pie/restorer.c
@@ -259,7 +259,7 @@ static u64 restore_mapping(const VmaEntry *vma_entry)
 	if (vma_entry->fd == -1 || !(vma_entry->flags & MAP_SHARED))
 		prot |= PROT_WRITE;
 
-	pr_debug("\tmmap(%lx -> %lx, %x %x %d\n",
+	pr_debug("\tmmap(%"PRIx64" -> %"PRIx64", %x %x %d\n",
 			vma_entry->start, vma_entry->end,
 			prot, flags, (int)vma_entry->fd);
 	/*
@@ -415,7 +415,7 @@ long __export_restore_task(struct task_restore_core_args *args)
 		if (!vma_entry_is(vma_entry, VMA_AREA_REGULAR))
 			continue;
 
-		pr_debug("Examine %lx-%lx\n", vma_entry->start, vma_entry->end);
+		pr_debug("Examine %"PRIx64"-%"PRIx64"\n", vma_entry->start, vma_entry->end);
 
 		if (addr < args->premmapped_addr) {
 			if (vma_entry->end >= args->premmapped_addr)
@@ -497,7 +497,7 @@ long __export_restore_task(struct task_restore_core_args *args)
 		va = restore_mapping(vma_entry);
 
 		if (va != vma_entry->start) {
-			pr_err("Can't restore %lx mapping with %lx\n", vma_entry->start, va);
+			pr_err("Can't restore %"PRIx64" mapping with %"PRIx64"\n", vma_entry->start, va);
 			goto core_restore_end;
 		}
 	}
@@ -542,7 +542,7 @@ long __export_restore_task(struct task_restore_core_args *args)
 						  vma_entry_len(vma_entry),
 						  i);
 				if (ret) {
-					pr_err("madvise(%lx, %ld, %ld) "
+					pr_err("madvise(%"PRIx64", %"PRIu64", %ld) "
 					       "failed with %ld\n",
 						vma_entry->start,
 						vma_entry_len(vma_entry),
diff --git a/proc_parse.c b/proc_parse.c
index e3a22b56d..83c4ef96e 100644
--- a/proc_parse.c
+++ b/proc_parse.c
@@ -162,7 +162,7 @@ static int is_anon_shmem_map(dev_t dev)
 		munmap(map, PAGE_SIZE);
 
 		shmem_dev = buf.st_dev;
-		pr_info("Found anon-shmem piggie at %lx\n", shmem_dev);
+		pr_info("Found anon-shmem piggie at %"PRIx64"\n", shmem_dev);
 	}
 
 	return shmem_dev == dev;
@@ -197,7 +197,7 @@ int parse_smaps(pid_t pid, struct list_head *vma_area_list, bool use_map_files)
 		if (!is_vma_range_fmt(buf)) {
 			if (!strncmp(buf, "Nonlinear", 9)) {
 				BUG_ON(!vma_area);
-				pr_err("Nonlinear mapping found %016lx-%016lx\n",
+				pr_err("Nonlinear mapping found %016"PRIx64"-%016"PRIx64"\n",
 				       vma_area->vma.start, vma_area->vma.end);
 				/*
 				 * VMA is already on list and will be
@@ -249,7 +249,7 @@ int parse_smaps(pid_t pid, struct list_head *vma_area_list, bool use_map_files)
 					if (!S_ISSOCK(buf.st_mode))
 						goto err_bogus_mapfile;
 
-					pr_info("Found socket %lu mapping @%lx\n", buf.st_ino, start);
+					pr_info("Found socket %"PRIu64" mapping @%lx\n", buf.st_ino, start);
 					vma_area->vma.status |= VMA_AREA_SOCKET | VMA_AREA_REGULAR;
 					vma_area->vm_socket_id = buf.st_ino;
 				} else if (errno != ENOENT)
@@ -358,7 +358,7 @@ err:
 	return ret;
 
 err_bogus_mapping:
-	pr_err("Bogus mapping 0x%lx-0x%lx (flags: %#x vm_file_fd: %d)\n",
+	pr_err("Bogus mapping 0x%"PRIx64"-0x%"PRIx64" (flags: %#x vm_file_fd: %d)\n",
 	       vma_area->vma.start, vma_area->vma.end,
 	       vma_area->vma.flags, vma_area->vm_file_fd);
 	goto err;
@@ -893,7 +893,7 @@ int parse_fdinfo(int fd, int type,
 
 			if (type != FD_TYPES__EVENTFD)
 				goto parse_err;
-			ret = sscanf(str, "eventfd-count: %lx",
+			ret = sscanf(str, "eventfd-count: %"PRIx64,
 					&entry.efd.counter);
 			if (ret != 1)
 				goto parse_err;
@@ -909,7 +909,7 @@ int parse_fdinfo(int fd, int type,
 
 			if (type != FD_TYPES__EVENTPOLL)
 				goto parse_err;
-			ret = sscanf(str, "tfd: %d events: %x data: %lx",
+			ret = sscanf(str, "tfd: %d events: %x data: %"PRIx64,
 					&entry.epl.tfd, &entry.epl.events, &entry.epl.data);
 			if (ret != 3)
 				goto parse_err;
@@ -962,7 +962,7 @@ int parse_fdinfo(int fd, int type,
 			entry.ffy.ie = &ie;
 
 			ret = sscanf(str,
-				     "fanotify ino:%lx sdev:%x mflags:%x mask:%x ignored_mask:%x "
+				     "fanotify ino:%"PRIx64" sdev:%x mflags:%x mask:%x ignored_mask:%x "
 				     "fhandle-bytes:%x fhandle-type:%x f_handle: %n",
 				     &ie.i_ino, &entry.ffy.s_dev,
 				     &entry.ffy.mflags, &entry.ffy.mask, &entry.ffy.ignored_mask,
@@ -1020,7 +1020,7 @@ int parse_fdinfo(int fd, int type,
 			if (type != FD_TYPES__INOTIFY)
 				goto parse_err;
 			ret = sscanf(str,
-					"inotify wd:%x ino:%lx sdev:%x "
+					"inotify wd:%x ino:%"PRIx64" sdev:%x "
 					"mask:%x ignored_mask:%x "
 					"fhandle-bytes:%x fhandle-type:%x "
 					"f_handle: %n",
diff --git a/shmem.c b/shmem.c
index cb5263405..5e2c4a35f 100644
--- a/shmem.c
+++ b/shmem.c
@@ -58,7 +58,7 @@ static int collect_shmem(int pid, VmaEntry *vi)
 		return -1;
 	}
 
-	pr_info("Add new shmem 0x%lx (0x0160x%lx-0x0160x%lx)",
+	pr_info("Add new shmem 0x%"PRIx64" (0x0160x%"PRIx64"-0x0160x%"PRIx64")",
 				vi->shmid, vi->start, vi->end);
 
 	si = &rst_shmems->entries[nr_shmems];
@@ -94,7 +94,7 @@ int prepare_shmem_pid(int pid)
 		if (ret <= 0)
 			break;
 
-		pr_info("vma 0x%lx 0x%lx\n", vi->start, vi->end);
+		pr_info("vma 0x%"PRIx64" 0x%"PRIx64"\n", vi->start, vi->end);
 
 		if (!vma_entry_is(vi, VMA_ANON_SHARED) ||
 		    vma_entry_is(vi, VMA_AREA_SYSVIPC)) {
@@ -167,9 +167,9 @@ int get_shmem_fd(int pid, VmaEntry *vi)
 	int f;
 
 	si = find_shmem(rst_shmems, vi->shmid);
-	pr_info("Search for 0x%016lx shmem 0x%lx %p/%d\n", vi->start, vi->shmid, si, si ? si->pid : -1);
+	pr_info("Search for 0x%016"PRIx64" shmem 0x%"PRIx64" %p/%d\n", vi->start, vi->shmid, si, si ? si->pid : -1);
 	if (!si) {
-		pr_err("Can't find my shmem 0x%016lx\n", vi->start);
+		pr_err("Can't find my shmem 0x%016"PRIx64"\n", vi->start);
 		return -1;
 	}
 
@@ -190,7 +190,7 @@ int get_shmem_fd(int pid, VmaEntry *vi)
 			PROT_WRITE | PROT_READ,
 			MAP_SHARED | MAP_ANONYMOUS, -1, 0);
 	if (addr == MAP_FAILED) {
-		pr_err("Can't mmap shmid=0x%lx size=%ld\n",
+		pr_err("Can't mmap shmid=0x%"PRIx64" size=%ld\n",
 				vi->shmid, si->size);
 		return -1;
 	}
diff --git a/sk-packet.c b/sk-packet.c
index 9b667c43b..5338313e0 100644
--- a/sk-packet.c
+++ b/sk-packet.c
@@ -228,7 +228,7 @@ int dump_socket_map(struct vma_area *vma)
 		return -1;
 	}
 
-	pr_info("Dumping socket map %x -> %lx\n", sd->file_id, vma->vma.start);
+	pr_info("Dumping socket map %x -> %"PRIx64"\n", sd->file_id, vma->vma.start);
 	vma->vma.shmid = sd->file_id;
 	return 0;
 }
diff --git a/sysctl.c b/sysctl.c
index 0a791e1a4..62236dbe7 100644
--- a/sysctl.c
+++ b/sysctl.c
@@ -134,14 +134,14 @@ GEN_SYSCTL_READ_FUNC(u32, strtoul);
 GEN_SYSCTL_READ_FUNC(u64, strtoull);
 
 GEN_SYSCTL_WRITE_FUNC(u32, "%u ");
-GEN_SYSCTL_WRITE_FUNC(u64, "%lu ");
+GEN_SYSCTL_WRITE_FUNC(u64, "%"PRIu64" ");
 
 GEN_SYSCTL_PRINT_FUNC(u32, "%u ");
-GEN_SYSCTL_PRINT_FUNC(u64, "%lu ");
+GEN_SYSCTL_PRINT_FUNC(u64, "%"PRIu64" ");
 GEN_SYSCTL_PRINT_FUNC(char, "%c");
 
 GEN_SYSCTL_SHOW_FUNC(u32, "%u ");
-GEN_SYSCTL_SHOW_FUNC(u64, "%lu ");
+GEN_SYSCTL_SHOW_FUNC(u64, "%"PRIu64" ");
 GEN_SYSCTL_SHOW_FUNC(char, "%c");
 
 static int
diff --git a/util.c b/util.c
index 93678d2d9..baf80904c 100644
--- a/util.c
+++ b/util.c
@@ -87,13 +87,14 @@ static void vma_opt_str(const struct vma_area *v, char *opt)
 void pr_vma(unsigned int loglevel, const struct vma_area *vma_area)
 {
 	char opt[VMA_OPT_LEN];
+	memset(opt, 0, VMA_OPT_LEN);
 
 	if (!vma_area)
 		return;
 
 	vma_opt_str(vma_area, opt);
-	print_on_level(loglevel, "%#lx-%#lx (%liK) prot %#x flags %#x off %#lx "
-			"%s shmid: %#lx\n",
+	print_on_level(loglevel, "%#"PRIx64"-%#"PRIx64" (%"PRIi64"K) prot %#x flags %#x off %#"PRIx64" "
+			"%s shmid: %#"PRIx64"\n",
 			vma_area->vma.start, vma_area->vma.end,
 			KBYTES(vma_area_len(vma_area)),
 			vma_area->vma.prot,