sys/linux: fix control len in msghdr's

Contol len is in bytes, not array elements.

11 files changed, 65 insertions, 65 deletions

diff --git a/sys/linux/386.go b/sys/linux/386.go
index 7776d555a..3b529600d 100644
--- a/sys/linux/386.go
+++ b/sys/linux/386.go
@@ -3302,7 +3302,7 @@ var structDescs_386 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_nl"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msghdr_netrom"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msghdr_netrom", TypeSize: 28}, Fields: []Type{
@@ -3311,7 +3311,7 @@ var structDescs_386 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msghdr_sctp"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msghdr_sctp", TypeSize: 28}, Fields: []Type{
@@ -3320,7 +3320,7 @@ var structDescs_386 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_sctp"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msghdr_un"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msghdr_un", TypeSize: 28}, Fields: []Type{
@@ -3329,7 +3329,7 @@ var structDescs_386 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "netlink_msg"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "netlink_msg"}, Fields: []Type{
@@ -3345,8 +3345,8 @@ var structDescs_386 = []*KeyedStruct{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 4}}, Buf: "addr"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "nl_mmap_req"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "nl_mmap_req", TypeSize: 16}, Fields: []Type{
@@ -3423,8 +3423,8 @@ var structDescs_386 = []*KeyedStruct{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_namelen", TypeSize: 4}}, Buf: "msg_name"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_out"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 4}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "msg_control", TypeSize: 4}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 4}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 4, IsOptional: true}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "array", ArgDir: 1}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 4}}, ByteSize: 1, Buf: "msg_control"},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int32", FldName: "msg_flags", TypeSize: 4}}},
 	}}},
 	{Key: StructKey{Name: "rlimit"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "rlimit", TypeSize: 8}, Fields: []Type{
@@ -3817,8 +3817,8 @@ var structDescs_386 = []*KeyedStruct{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_namelen", TypeSize: 4}}, Buf: "msg_name"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 4}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 4}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 4}}, ByteSize: 1, Buf: "msg_control"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "sigaction"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "sigaction", TypeSize: 24}, Fields: []Type{
@@ -16730,4 +16730,4 @@ var consts_386 = []ConstValue{
 	{Name: "__WNOTHREAD", Value: 536870912},
 }
 
-const revision_386 = "f9bbdaa02263a26fd7f9b2762eb8b25491b76e0b"
+const revision_386 = "aae34d0fe6a419443c4a5301a17ebcf68fcd06a1"
diff --git a/sys/linux/amd64.go b/sys/linux/amd64.go
index c0b1c8c7b..3dbe0427a 100644
--- a/sys/linux/amd64.go
+++ b/sys/linux/amd64.go
@@ -3375,7 +3375,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_nl"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3386,7 +3386,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3397,7 +3397,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_sctp"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3408,7 +3408,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3439,8 +3439,8 @@ var structDescs_amd64 = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3519,8 +3519,8 @@ var structDescs_amd64 = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_out"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 8}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "msg_control", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 8}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8, IsOptional: true}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "array", ArgDir: 1}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, ByteSize: 1, Buf: "msg_control"},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int32", FldName: "msg_flags", TypeSize: 4}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3927,8 +3927,8 @@ var structDescs_amd64 = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 8}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 8}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, ByteSize: 1, Buf: "msg_control"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -17261,4 +17261,4 @@ var consts_amd64 = []ConstValue{
 	{Name: "__WNOTHREAD", Value: 536870912},
 }
 
-const revision_amd64 = "36a58e82c36ea6b3664a8b46fff6e1d124425c58"
+const revision_amd64 = "ab94efdf80672daa1f97eae8307df7168cf751c1"
diff --git a/sys/linux/arm.go b/sys/linux/arm.go
index c40a33755..c8a004d06 100644
--- a/sys/linux/arm.go
+++ b/sys/linux/arm.go
@@ -3132,7 +3132,7 @@ var structDescs_arm = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_nl"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msghdr_netrom"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msghdr_netrom", TypeSize: 28}, Fields: []Type{
@@ -3141,7 +3141,7 @@ var structDescs_arm = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msghdr_sctp"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msghdr_sctp", TypeSize: 28}, Fields: []Type{
@@ -3150,7 +3150,7 @@ var structDescs_arm = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_sctp"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msghdr_un"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msghdr_un", TypeSize: 28}, Fields: []Type{
@@ -3159,7 +3159,7 @@ var structDescs_arm = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "msqid_ds"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msqid_ds", TypeSize: 76}, Fields: []Type{
@@ -3188,8 +3188,8 @@ var structDescs_arm = []*KeyedStruct{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 4}}, Buf: "addr"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 4}}, Buf: "vec"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 4}}, Buf: "ctrl"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 4, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 4}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "nl_mmap_req"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "nl_mmap_req", TypeSize: 16}, Fields: []Type{
@@ -3266,8 +3266,8 @@ var structDescs_arm = []*KeyedStruct{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_namelen", TypeSize: 4}}, Buf: "msg_name"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_out"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 4}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "msg_control", TypeSize: 4}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 4}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 4, IsOptional: true}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "array", ArgDir: 1}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 4}}, ByteSize: 1, Buf: "msg_control"},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int32", FldName: "msg_flags", TypeSize: 4}}},
 	}}},
 	{Key: StructKey{Name: "rlimit"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "rlimit", TypeSize: 8}, Fields: []Type{
@@ -3673,8 +3673,8 @@ var structDescs_arm = []*KeyedStruct{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_namelen", TypeSize: 4}}, Buf: "msg_name"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 4}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 4}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 4}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 4, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 4}}, ByteSize: 1, Buf: "msg_control"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 	}}},
 	{Key: StructKey{Name: "shmid_ds"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "shmid_ds", TypeSize: 72}, Fields: []Type{
@@ -16598,4 +16598,4 @@ var consts_arm = []ConstValue{
 	{Name: "__WNOTHREAD", Value: 536870912},
 }
 
-const revision_arm = "138a55d450da8e1694944e8888d4073f2db0a9f5"
+const revision_arm = "628283c78d3a52c4fe7c06f50f97f28a8ad179f0"
diff --git a/sys/linux/arm64.go b/sys/linux/arm64.go
index 2f1ae0c7e..fa0b2329b 100644
--- a/sys/linux/arm64.go
+++ b/sys/linux/arm64.go
@@ -3180,7 +3180,7 @@ var structDescs_arm64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_nl"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3191,7 +3191,7 @@ var structDescs_arm64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3202,7 +3202,7 @@ var structDescs_arm64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_sctp"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3213,7 +3213,7 @@ var structDescs_arm64 = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3244,8 +3244,8 @@ var structDescs_arm64 = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3324,8 +3324,8 @@ var structDescs_arm64 = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_out"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 8}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "msg_control", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 8}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8, IsOptional: true}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "array", ArgDir: 1}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, ByteSize: 1, Buf: "msg_control"},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int32", FldName: "msg_flags", TypeSize: 4}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3732,8 +3732,8 @@ var structDescs_arm64 = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 8}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 8}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, ByteSize: 1, Buf: "msg_control"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -16643,4 +16643,4 @@ var consts_arm64 = []ConstValue{
 	{Name: "__WNOTHREAD", Value: 536870912},
 }
 
-const revision_arm64 = "a7f7685d8f9761eda7eb661c373a502825fbc063"
+const revision_arm64 = "e1c7895e732a902caaed79afa8a3cf59d2284d0c"
diff --git a/sys/linux/ppc64le.go b/sys/linux/ppc64le.go
index 5d4ad930c..02f0edf04 100644
--- a/sys/linux/ppc64le.go
+++ b/sys/linux/ppc64le.go
@@ -3125,7 +3125,7 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_nl"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3136,7 +3136,7 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3147,7 +3147,7 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_sctp"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3158,7 +3158,7 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3176,8 +3176,8 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "vec", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "vlen", TypeSize: 8}}, Buf: "vec"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "ctrllen", TypeSize: 8}}, Buf: "ctrl"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "ctrl", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, ByteSize: 1, Buf: "ctrl"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3256,8 +3256,8 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_out"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 8}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "msg_control", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 8}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8, IsOptional: true}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "array", ArgDir: 1}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, ByteSize: 1, Buf: "msg_control"},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int32", FldName: "msg_flags", TypeSize: 4}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -3651,8 +3651,8 @@ var structDescs_ppc64le = []*KeyedStruct{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_iov", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "iovec_in"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_iovlen", TypeSize: 8}}, Buf: "msg_iov"},
-		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
-		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "msg_controllen", TypeSize: 8}}, Buf: "msg_control"},
+		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg_control", TypeSize: 8, IsOptional: true}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array"}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
+		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, ByteSize: 1, Buf: "msg_control"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{2048, 4, 64, 128, 32768, 16384, 1, 16, 262144, 536870912, 67108864}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
@@ -16328,4 +16328,4 @@ var consts_ppc64le = []ConstValue{
 	{Name: "__WNOTHREAD", Value: 536870912},
 }
 
-const revision_ppc64le = "9c00b115a93768932c5ce5184066a522699ea726"
+const revision_ppc64le = "21563b0f7ed5042b36ead97cf74973c834d42389"
diff --git a/sys/linux/socket.txt b/sys/linux/socket.txt
index 429a3dd3f..9706dcea0 100644
--- a/sys/linux/socket.txt
+++ b/sys/linux/socket.txt
@@ -150,8 +150,8 @@ send_msghdr {
 	msg_namelen	len[msg_name, int32]
 	msg_iov		ptr[in, array[iovec_in]]
 	msg_iovlen	len[msg_iov, intptr]
-	msg_control	ptr[in, array[cmsghdr]]
-	msg_controllen	len[msg_control, intptr]
+	msg_control	ptr[in, array[cmsghdr], opt]
+	msg_controllen	bytesize[msg_control, intptr]
 	msg_flags	flags[send_flags, int32]
 }
 
@@ -165,8 +165,8 @@ recv_msghdr {
 	msg_namelen	len[msg_name, int32]
 	msg_iov		ptr[in, array[iovec_out]]
 	msg_iovlen	len[msg_iov, intptr]
-	msg_control	buffer[out]
-	msg_controllen	len[msg_control, intptr]
+	msg_control	ptr[out, array[int8], opt]
+	msg_controllen	bytesize[msg_control, intptr]
 	msg_flags	int32
 }
 
diff --git a/sys/linux/socket_inet_sctp.txt b/sys/linux/socket_inet_sctp.txt
index 87edafe72..b368a6e14 100755
--- a/sys/linux/socket_inet_sctp.txt
+++ b/sys/linux/socket_inet_sctp.txt
@@ -38,7 +38,7 @@ msghdr_sctp {
 	vec	ptr[in, array[iovec_in]]
 	vlen	len[vec, intptr]
 	ctrl	ptr[in, array[cmsghdr_sctp], opt]
-	ctrllen	len[ctrl, intptr]
+	ctrllen	bytesize[ctrl, intptr]
 	f	flags[send_flags, int32]
 }
 
diff --git a/sys/linux/socket_netlink.txt b/sys/linux/socket_netlink.txt
index 1004cfd3e..d10b1bc99 100644
--- a/sys/linux/socket_netlink.txt
+++ b/sys/linux/socket_netlink.txt
@@ -43,7 +43,7 @@ msghdr_netlink {
 	vec	ptr[in, array[iovec_nl]]
 	vlen	len[vec, intptr]
 	ctrl	ptr[in, array[cmsghdr_un], opt]
-	ctrllen	len[ctrl, intptr]
+	ctrllen	bytesize[ctrl, intptr]
 	f	flags[send_flags, int32]
 }
 
diff --git a/sys/linux/socket_netrom.txt b/sys/linux/socket_netrom.txt
index 330abcf91..950af7ddc 100755
--- a/sys/linux/socket_netrom.txt
+++ b/sys/linux/socket_netrom.txt
@@ -47,6 +47,6 @@ msghdr_netrom {
 	vec	ptr[in, array[iovec_in]]
 	vlen	len[vec, intptr]
 	ctrl	ptr[in, array[cmsghdr], opt]
-	ctrllen	len[ctrl, intptr]
+	ctrllen	bytesize[ctrl, intptr]
 	f	flags[send_flags, int32]
 }
diff --git a/sys/linux/socket_nfc.txt b/sys/linux/socket_nfc.txt
index d3d4216de..b4b764e49 100644
--- a/sys/linux/socket_nfc.txt
+++ b/sys/linux/socket_nfc.txt
@@ -52,7 +52,7 @@ nfc_llcp_send_msghdr {
 	addrlen	len[addr, int32]
 	vec	ptr[in, array[iovec_in]]
 	vlen	len[vec, intptr]
-	ctrl	ptr[in, cmsghdr]
-	ctrllen	len[ctrl, intptr]
+	ctrl	ptr[in, cmsghdr, opt]
+	ctrllen	bytesize[ctrl, intptr]
 	f	flags[send_flags, int32]
 }
diff --git a/sys/linux/socket_unix.txt b/sys/linux/socket_unix.txt
index 7d0f90751..5dfe049ca 100644
--- a/sys/linux/socket_unix.txt
+++ b/sys/linux/socket_unix.txt
@@ -52,7 +52,7 @@ msghdr_un {
 	vec	ptr[in, array[iovec_in]]
 	vlen	len[vec, intptr]
 	ctrl	ptr[in, array[cmsghdr_un], opt]
-	ctrllen	len[ctrl, intptr]
+	ctrllen	bytesize[ctrl, intptr]
 	f	flags[send_flags, int32]
 }