diff --git a/share/btrace/uprofile.bt b/share/btrace/uprofile.bt
index 17ce622ee96..5978de8054e 100644
--- a/share/btrace/uprofile.bt
+++ b/share/btrace/uprofile.bt
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uprofile.bt,v 1.1 2023/05/12 14:34:00 claudio Exp $	*/
+/*	$OpenBSD: uprofile.bt,v 1.2 2025/10/05 22:31:54 sashan Exp $	*/
 
 /*
  * uprofile.bt	Userland profiling (stack sampling) at 100Hz.
@@ -9,8 +9,13 @@
  *
  * The PID of the to be monitored process is the first optional argument to
  * btrace(8).
- * This only works for a single static binary where everything was compiled
- * with -fno-omit-frame-pointer.
+ *
+ * To collect profiling data for process with pid 12345 one uses uprofile.bt
+ * script as follows:
+ *     btrace /usr/share/btrace/uprofile.bt 12345
+ * after hitting Ctrl+C the btrace process terminates  and writes collected
+ * profiling data to standard output.  This only works for ELF objects which
+ * are compiled with -fno-omit-frame-pointer.
  */
 profile:hz:100 / pid == $1 / {
 	@[ustack] = count();
diff --git a/share/man/man4/dt.4 b/share/man/man4/dt.4
index b7a2814f117..937056e74e4 100644
--- a/share/man/man4/dt.4
+++ b/share/man/man4/dt.4
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: dt.4,v 1.7 2020/12/02 07:00:42 anton Exp $
+.\"	$OpenBSD: dt.4,v 1.8 2025/10/05 22:31:54 sashan Exp $
 .\"
 .\" Copyright (c) 2019 Martin Pieuchot <mpi@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: December 2 2020 $
+.Dd $Mdocdate: October 5 2025 $
 .Dt DT 4
 .Os
 .Sh NAME
@@ -77,6 +77,58 @@ struct dtioc_req {
 	uint64_t		 dtrq_evtflags;
 };
 .Ed
+.It Dv DTIOCRDVNODE Fa "struct *dtioc_rdvn"
+Resolve the instruction pointer from the traced process to the ELF object.
+.Bd -literal
+struct dtioc_rdvn {
+	pid_t			 dtrv_pid;
+	int			 dtrv_fd;
+	caddr_t			 dtrv_va;
+	caddr_t			 dtrv_offset;
+	caddr_t			 dtrv_start;
+	size_t			 dtrv_len;
+};
+.Ed
+.Pp
+The caller populates
+.Fa dtrv_pid
+with the process ID of the traced process and
+.Fa dtrv_va
+with the program counter address to look up.
+.Pp
+On success, the remaining members are populated.
+.Fa dtrv_fd
+is the file descriptor to the DSO file that
+.Fa dtrv_va
+belongs to.
+.FA dtrv_len
+is the length of the DSO file.
+.Fa dtrv_offset
+and
+.Fa dtrv_start
+are the relative offset of
+.Fa dtrv_va
+to the start of the text segment and the base address of that segment
+respectively.
+.Pp
+To calculate the relative offset of
+.Fa dtrv_va
+in the DSO the following calculation can be used:
+.Pp
+.Dl iOffset = dtrv_va - dtrv_start + dtrv_offset
+.Pp
+The segment can be found by walking the ELF program headers and looking
+for the mapping where iOffset is included in the range
+[GElf_Phdr.p_offset, GElf_Phdr.p_offset + GElf_Phdr.p_filesz)
+.Pp
+Using the
+.Vt GElf_Phdr.p_vaddr
+the base address of the segment can be calculated by
+.Dl lbase = dtrv_start - GElf_Phdr.p_vaddr
+.Pp
+For symbol lookups the offset can now be calculated as
+.Dl symOffset = dtrv_va - lbase
+.El
 .El
 .Sh FILES
 .Bl -tag -width /dev/dt -compact
diff --git a/usr.sbin/btrace/btrace.8 b/usr.sbin/btrace/btrace.8
index 6d5172b82c9..4ac55ca7824 100644
--- a/usr.sbin/btrace/btrace.8
+++ b/usr.sbin/btrace/btrace.8
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: btrace.8,v 1.10 2025/05/18 20:09:58 schwarze Exp $
+.\"	$OpenBSD: btrace.8,v 1.11 2025/10/05 22:31:54 sashan Exp $
 .\"
 .\" Copyright (c) 2019 Martin Pieuchot <mpi@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: May 18 2025 $
+.Dd $Mdocdate: October 5 2025 $
 .Dt BTRACE 8
 .Os
 .Sh NAME
@@ -23,7 +23,6 @@
 .Sh SYNOPSIS
 .Nm btrace
 .Op Fl lnv
-.Op Fl p Ar elffile
 .Ar programfile | Fl e Ar program
 .Op Ar argument ...
 .Sh DESCRIPTION
@@ -56,12 +55,6 @@ List all available probes.
 .It Fl n
 No action.
 Parse the program and then exit.
-.It Fl p Ar elffile
-Load symbols from the
-.Ar elffile
-to convert
-.Va ustack
-addresses into function names.
 .It Fl v
 Verbose mode.
 Causes
diff --git a/usr.sbin/btrace/btrace.c b/usr.sbin/btrace/btrace.c
index dcc7237865c..2a95de74ef2 100644
--- a/usr.sbin/btrace/btrace.c
+++ b/usr.sbin/btrace/btrace.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: btrace.c,v 1.98 2025/09/22 07:49:43 sashan Exp $ */
+/*	$OpenBSD: btrace.c,v 1.99 2025/10/05 22:31:54 sashan Exp $ */
 
 /*
  * Copyright (c) 2019 - 2023 Martin Pieuchot <mpi@openbsd.org>
@@ -230,7 +230,7 @@ main(int argc, char *argv[])
 __dead void
 usage(void)
 {
-	fprintf(stderr, "usage: %s [-lnv] [-p elffile] "
+	fprintf(stderr, "usage: %s [-lnv] "
 	    "programfile | -e program [argument ...]\n", getprogname());
 	exit(1);
 }