diff --git a/libc-test/build.rs b/libc-test/build.rs
index a10756380bb83..7ef89cd52e23d 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -2074,6 +2074,12 @@ fn test_freebsd(target: &str) {
             // These constants were introduced in FreeBSD 13:
             "EFD_CLOEXEC" | "EFD_NONBLOCK" | "EFD_SEMAPHORE" if Some(13) > freebsd_ver => true,
 
+            // This constant was introduced in FreeBSD 12:
+            "O_RESOLVE_BENEATH" if Some(12) > freebsd_ver => true,
+
+            // These constants were introduced in FreeBSD 13:
+            "O_DSYNC" | "O_PATH" | "O_EMPTY_PATH" if Some(13) > freebsd_ver => true,
+
             // FIXME: These are deprecated - remove in a couple of releases.
             // These constants were removed in FreeBSD 11 (svn r273250) but will
             // still be accepted and ignored at runtime.
@@ -2305,9 +2311,6 @@ fn test_freebsd(target: &str) {
             // FIXME: https://github.com/rust-lang/libc/issues/1272
             "execv" | "execve" | "execvp" | "execvpe" | "fexecve" => true,
 
-            // `fspacectl` was introduced in FreeBSD 14
-            "fspacectl" if Some(14) > freebsd_ver => true,
-
             // The `uname` function in the `utsname.h` FreeBSD header is a C
             // inline function (has no symbol) that calls the `__xuname` symbol.
             // Therefore the function pointer comparison does not make sense for it.
@@ -2319,26 +2322,36 @@ fn test_freebsd(target: &str) {
             // https://github.com/gnzlbg/ctest/issues/68
             "lio_listio" => true,
 
-            // Those are introduced in FreeBSD 14.
-            "sched_getaffinity" | "sched_setaffinity" | "sched_getcpu"
-                if Some(14) > freebsd_ver =>
+            // Those are introduced in FreeBSD 12.
+            "clock_nanosleep" | "getrandom" | "elf_aux_info" | "setproctitle_fast"
+            | "timingsafe_bcmp" | "timingsafe_memcmp"
+                if Some(12) > freebsd_ver =>
             {
                 true
             }
 
-            // This is not available in FreeBSD 12.
-            "SOCKCRED2SIZE" if Some(13) > freebsd_ver => true,
-
-            // Those are not available in FreeBSD 12.
-            "memfd_create" | "shm_create_largepage" | "shm_rename" if Some(13) > freebsd_ver => {
+            // Those are introduced in FreeBSD 13.
+            "memfd_create"
+            | "shm_create_largepage"
+            | "shm_rename"
+            | "getentropy"
+            | "eventfd"
+            | "SOCKCRED2SIZE"
+            | "getlocalbase"
+            | "aio_readv"
+            | "aio_writev"
+            | "copy_file_range"
+                if Some(13) > freebsd_ver =>
+            {
                 true
             }
 
-            // Added in FreeBSD 13.
-            "getlocalbase" if Some(13) > freebsd_ver => true,
-            "aio_readv" if Some(13) > freebsd_ver => true,
-            "aio_writev" if Some(13) > freebsd_ver => true,
-            "copy_file_range" if Some(13) > freebsd_ver => true,
+            // Those are introduced in FreeBSD 14.
+            "sched_getaffinity" | "sched_setaffinity" | "sched_getcpu" | "fspacectl"
+                if Some(14) > freebsd_ver =>
+            {
+                true
+            }
 
             _ => false,
         }
diff --git a/libc-test/semver/freebsd.txt b/libc-test/semver/freebsd.txt
index 706a35fe19735..c432244327f59 100644
--- a/libc-test/semver/freebsd.txt
+++ b/libc-test/semver/freebsd.txt
@@ -819,14 +819,20 @@ ONOEOT
 OXTABS
 O_ASYNC
 O_DIRECT
+O_DSYNC
+O_EMPTY_PATH
 O_EXEC
 O_EXLOCK
 O_FSYNC
 O_NDELAY
 O_NOCTTY
+O_PATH
+O_RESOLVE_BENEATH
+O_SEARCH
 O_SHLOCK
 O_SYNC
 O_TTY_INIT
+O_VERIFY
 PD_ALLOWED_AT_FORK
 PD_CLOEXEC
 PD_DAEMON
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs
index 563c0f936ffef..f2d170fb28864 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd11/mod.rs
@@ -462,8 +462,8 @@ extern "C" {
         msgflg: ::c_int,
     ) -> ::c_int;
 
-    pub fn fdatasync(fd: ::c_int) -> ::c_int;
-
+    // Type of `path` argument changed from `const void*` to `void*`
+    // in FreeBSD 12
     pub fn dirname(path: *const ::c_char) -> *mut ::c_char;
     pub fn basename(path: *const ::c_char) -> *mut ::c_char;
 }
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs
index df00b6c1d63fe..5cd4eff26fc04 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd12/mod.rs
@@ -473,20 +473,6 @@ extern "C" {
         msgtyp: ::c_long,
         msgflg: ::c_int,
     ) -> ::ssize_t;
-    pub fn clock_nanosleep(
-        clk_id: ::clockid_t,
-        flags: ::c_int,
-        rqtp: *const ::timespec,
-        rmtp: *mut ::timespec,
-    ) -> ::c_int;
-
-    pub fn fdatasync(fd: ::c_int) -> ::c_int;
-
-    pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
-    pub fn elf_aux_info(aux: ::c_int, buf: *mut ::c_void, buflen: ::c_int) -> ::c_int;
-    pub fn setproctitle_fast(fmt: *const ::c_char, ...);
-    pub fn timingsafe_bcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
-    pub fn timingsafe_memcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
 
     pub fn dirname(path: *mut ::c_char) -> *mut ::c_char;
     pub fn basename(path: *mut ::c_char) -> *mut ::c_char;
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
index 72a38dc226851..56564eeb454f0 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd13/mod.rs
@@ -492,23 +492,6 @@ extern "C" {
         msgtyp: ::c_long,
         msgflg: ::c_int,
     ) -> ::ssize_t;
-    pub fn clock_nanosleep(
-        clk_id: ::clockid_t,
-        flags: ::c_int,
-        rqtp: *const ::timespec,
-        rmtp: *mut ::timespec,
-    ) -> ::c_int;
-
-    pub fn eventfd(init: ::c_uint, flags: ::c_int) -> ::c_int;
-
-    pub fn fdatasync(fd: ::c_int) -> ::c_int;
-
-    pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
-    pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;
-    pub fn elf_aux_info(aux: ::c_int, buf: *mut ::c_void, buflen: ::c_int) -> ::c_int;
-    pub fn setproctitle_fast(fmt: *const ::c_char, ...);
-    pub fn timingsafe_bcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
-    pub fn timingsafe_memcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
 
     pub fn cpuset_getdomain(
         level: ::cpulevel_t,
diff --git a/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs b/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs
index 115b47764e69e..d60f1a174f1d5 100644
--- a/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/freebsd14/mod.rs
@@ -492,23 +492,6 @@ extern "C" {
         msgtyp: ::c_long,
         msgflg: ::c_int,
     ) -> ::ssize_t;
-    pub fn clock_nanosleep(
-        clk_id: ::clockid_t,
-        flags: ::c_int,
-        rqtp: *const ::timespec,
-        rmtp: *mut ::timespec,
-    ) -> ::c_int;
-
-    pub fn eventfd(init: ::c_uint, flags: ::c_int) -> ::c_int;
-
-    pub fn fdatasync(fd: ::c_int) -> ::c_int;
-
-    pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
-    pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;
-    pub fn elf_aux_info(aux: ::c_int, buf: *mut ::c_void, buflen: ::c_int) -> ::c_int;
-    pub fn setproctitle_fast(fmt: *const ::c_char, ...);
-    pub fn timingsafe_bcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
-    pub fn timingsafe_memcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
 
     pub fn cpuset_getdomain(
         level: ::cpulevel_t,
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index a3e094248562e..7c18f676df4b6 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -2523,8 +2523,14 @@ pub const SF_USER_READAHEAD: ::c_int = 0x00000008;
 pub const SF_NOCACHE: ::c_int = 0x00000010;
 pub const O_CLOEXEC: ::c_int = 0x00100000;
 pub const O_DIRECTORY: ::c_int = 0x00020000;
+pub const O_DSYNC: ::c_int = 0x01000000;
+pub const O_EMPTY_PATH: ::c_int = 0x02000000;
 pub const O_EXEC: ::c_int = 0x00040000;
+pub const O_PATH: ::c_int = 0x00400000;
+pub const O_RESOLVE_BENEATH: ::c_int = 0x00800000;
+pub const O_SEARCH: ::c_int = O_EXEC;
 pub const O_TTY_INIT: ::c_int = 0x00080000;
+pub const O_VERIFY: ::c_int = 0x00200000;
 pub const F_GETLK: ::c_int = 11;
 pub const F_SETLK: ::c_int = 12;
 pub const F_SETLKW: ::c_int = 13;
@@ -5096,6 +5102,12 @@ extern "C" {
     pub fn getpagesizes(pagesize: *mut ::size_t, nelem: ::c_int) -> ::c_int;
 
     pub fn clock_getcpuclockid2(arg1: ::id_t, arg2: ::c_int, arg3: *mut clockid_t) -> ::c_int;
+    pub fn clock_nanosleep(
+        clk_id: ::clockid_t,
+        flags: ::c_int,
+        rqtp: *const ::timespec,
+        rmtp: *mut ::timespec,
+    ) -> ::c_int;
 
     pub fn shm_create_largepage(
         path: *const ::c_char,
@@ -5112,6 +5124,17 @@ extern "C" {
     pub fn memfd_create(name: *const ::c_char, flags: ::c_uint) -> ::c_int;
     pub fn setaudit(auditinfo: *const auditinfo_t) -> ::c_int;
 
+    pub fn eventfd(init: ::c_uint, flags: ::c_int) -> ::c_int;
+
+    pub fn fdatasync(fd: ::c_int) -> ::c_int;
+
+    pub fn getrandom(buf: *mut ::c_void, buflen: ::size_t, flags: ::c_uint) -> ::ssize_t;
+    pub fn getentropy(buf: *mut ::c_void, buflen: ::size_t) -> ::c_int;
+    pub fn elf_aux_info(aux: ::c_int, buf: *mut ::c_void, buflen: ::c_int) -> ::c_int;
+    pub fn setproctitle_fast(fmt: *const ::c_char, ...);
+    pub fn timingsafe_bcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
+    pub fn timingsafe_memcmp(a: *const ::c_void, b: *const ::c_void, len: ::size_t) -> ::c_int;
+
     pub fn _umtx_op(
         obj: *mut ::c_void,
         op: ::c_int,