unix: add linux mseal system call

The mseal system call was added in Linux 6.10.

See https://lwn.net/Articles/954936.

Change-Id: Ic812a5d784effbc1f362045ffeb6f7e50ee5f8bb
GitHub-Last-Rev: de3924e954b1182e974c008b41e07fd21f283c30
GitHub-Pull-Request: golang/sys#209
Reviewed-on: https://go-review.googlesource.com/c/sys/+/600518
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>

unix/syscall_linux.go

@@ -2592,3 +2592,4 @@ func SchedGetAttr(pid int, flags uint) (*SchedAttr, error) {
 }
 
 //sys	Cachestat(fd uint, crange *CachestatRange, cstat *Cachestat_t, flags uint) (err error)
+//sys	Mseal(b []byte, flags uint) (err error)

unix/zsyscall_linux.go

@@ -2229,3 +2229,19 @@ func Cachestat(fd uint, crange *CachestatRange, cstat *Cachestat_t, flags uint)
 	}
 	return
 }
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func Mseal(b []byte, flags uint) (err error) {
+	var _p0 unsafe.Pointer
+	if len(b) > 0 {
+		_p0 = unsafe.Pointer(&b[0])
+	} else {
+		_p0 = unsafe.Pointer(&_zero)
+	}
+	_, _, e1 := Syscall(SYS_MSEAL, uintptr(_p0), uintptr(len(b)), uintptr(flags))
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}