unix: add MemfdCreate on Linux

Add a wrapper for the memfd_create syscall on Linux. See
http://man7.org/linux/man-pages/man2/memfd_create.2.html for more
information.

Also add the corresponding MFD_* constants to be used in the flags
argument.

Change-Id: Ib30a007e15575a38ecf204601ffede9c913799b6
Reviewed-on: https://go-review.googlesource.com/135915
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

unix/mkerrors.sh

@@ -193,6 +193,7 @@ struct ltchars {
 #include <linux/fs.h>
 #include <linux/keyctl.h>
 #include <linux/magic.h>
+#include <linux/memfd.h>
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netlink.h>
 #include <linux/net_namespace.h>
@@ -413,7 +414,7 @@ ccflags="$@"
 		$2 ~ /^TC[IO](ON|OFF)$/ ||
 		$2 ~ /^IN_/ ||
 		$2 ~ /^LOCK_(SH|EX|NB|UN)$/ ||
-		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|T?PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||
+		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|MFD|T?PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||
 		$2 ~ /^TP_STATUS_/ ||
 		$2 ~ /^FALLOC_/ ||
 		$2 == "ICMPV6_FILTER" ||

unix/syscall_linux.go

@@ -1320,6 +1320,7 @@ func Getpgrp() (pid int) {
 //sys	Llistxattr(path string, dest []byte) (sz int, err error)
 //sys	Lremovexattr(path string, attr string) (err error)
 //sys	Lsetxattr(path string, attr string, data []byte, flags int) (err error)
+//sys	MemfdCreate(name string, flags int) (fd int, err error)
 //sys	Mkdirat(dirfd int, path string, mode uint32) (err error)
 //sys	Mknodat(dirfd int, path string, mode uint32, dev int) (err error)
 //sys	Nanosleep(time *Timespec, leftover *Timespec) (err error)

unix/zerrors_linux_386.go

@@ -977,6 +977,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_amd64.go

@@ -977,6 +977,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_arm.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_arm64.go

@@ -978,6 +978,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_mips.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_mips64.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_mips64le.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_mipsle.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_ppc64.go

@@ -974,6 +974,21 @@ const (
 	MCL_CURRENT                          = 0x2000
 	MCL_FUTURE                           = 0x4000
 	MCL_ONFAULT                          = 0x8000
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_ppc64le.go

@@ -974,6 +974,21 @@ const (
 	MCL_CURRENT                          = 0x2000
 	MCL_FUTURE                           = 0x4000
 	MCL_ONFAULT                          = 0x8000
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_riscv64.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zerrors_linux_s390x.go

@@ -975,6 +975,21 @@ const (
 	MCL_CURRENT                          = 0x1
 	MCL_FUTURE                           = 0x2
 	MCL_ONFAULT                          = 0x4
+	MFD_ALLOW_SEALING                    = 0x2
+	MFD_CLOEXEC                          = 0x1
+	MFD_HUGETLB                          = 0x4
+	MFD_HUGE_16GB                        = -0x78000000
+	MFD_HUGE_16MB                        = 0x60000000
+	MFD_HUGE_1GB                         = 0x78000000
+	MFD_HUGE_1MB                         = 0x50000000
+	MFD_HUGE_256MB                       = 0x70000000
+	MFD_HUGE_2GB                         = 0x7c000000
+	MFD_HUGE_2MB                         = 0x54000000
+	MFD_HUGE_512KB                       = 0x4c000000
+	MFD_HUGE_64KB                        = 0x40000000
+	MFD_HUGE_8MB                         = 0x5c000000
+	MFD_HUGE_MASK                        = 0x3f
+	MFD_HUGE_SHIFT                       = 0x1a
 	MINIX2_SUPER_MAGIC                   = 0x2468
 	MINIX2_SUPER_MAGIC2                  = 0x2478
 	MINIX3_SUPER_MAGIC                   = 0x4d5a

unix/zsyscall_linux_386.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_amd64.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_arm.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_arm64.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_mips.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_mips64.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_mips64le.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_mipsle.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags int) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_ppc64.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags uint) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_ppc64le.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags uint) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_riscv64.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags uint) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)

unix/zsyscall_linux_s390x.go

@@ -979,6 +979,22 @@ func Lsetxattr(path string, attr string, data []byte, flags int) (err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func MemfdCreate(name string, flags uint) (fd int, err error) {
+	var _p0 *byte
+	_p0, err = BytePtrFromString(name)
+	if err != nil {
+		return
+	}
+	r0, _, e1 := Syscall(SYS_MEMFD_CREATE, uintptr(unsafe.Pointer(_p0)), uintptr(flags), 0)
+	fd = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Mkdirat(dirfd int, path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)