prog: detect when flags are a bitmask

1 files changed, 65 insertions, 65 deletions

diff --git a/sys/netbsd/gen/amd64.go b/sys/netbsd/gen/amd64.go
index 6b5df080c..0f61a42eb 100644
--- a/sys/netbsd/gen/amd64.go
+++ b/sys/netbsd/gen/amd64.go
@@ -61,7 +61,7 @@ var structDescs_amd64 = []*KeyedStruct{
 	}}},
 	{Key: StructKey{Name: "flock"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "flock", TypeSize: 32}, Fields: []Type{
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "flock_type", FldName: "type", TypeSize: 2}}, Vals: []uint64{1, 3, 2}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "seek_whence", FldName: "whence", TypeSize: 2}}, Vals: []uint64{0, 1, 2}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "seek_whence", FldName: "whence", TypeSize: 2}}, Vals: []uint64{0, 1, 2}, BitMask: true},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "intptr", FldName: "start", TypeSize: 8}}},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "intptr", FldName: "len", TypeSize: 8}}},
@@ -82,7 +82,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "gid", FldName: "gid", TypeSize: 4}},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "uid", FldName: "cuid", TypeSize: 4}},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "gid", FldName: "cgid", TypeSize: 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 4}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 4}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int16", FldName: "seq", TypeSize: 2}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "pad0", TypeSize: 2}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
@@ -114,7 +114,7 @@ var structDescs_amd64 = []*KeyedStruct{
 	}}},
 	{Key: StructKey{Name: "mif6ctl"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "mif6ctl", TypeSize: 12}, Fields: []Type{
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int16", FldName: "mif6c_mifi", TypeSize: 2}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mif6c_flags", FldName: "mif6c_flags", TypeSize: 1}}, Vals: []uint64{1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mif6c_flags", FldName: "mif6c_flags", TypeSize: 1}}, Vals: []uint64{1}, BitMask: true},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int8", FldName: "vifc_threshold", TypeSize: 1}}},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int16", FldName: "mif6c_pifi", TypeSize: 2}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 2}}, IsPad: true},
@@ -136,7 +136,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&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", IsVarlen: true}, Type: &UnionType{Key: StructKey{Name: "cmsghdr_un"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "ctrllen", TypeSize: 8}}, BitSize: 8, Buf: "ctrl"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 4}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
 	{Key: StructKey{Name: "msqid_ds"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "msqid_ds", TypeSize: 120}, Fields: []Type{
@@ -201,7 +201,7 @@ var structDescs_amd64 = []*KeyedStruct{
 	{Key: StructKey{Name: "sembuf"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "sembuf", TypeSize: 6}, Fields: []Type{
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sem_sem_id", FldName: "num", TypeSize: 2}}, Vals: []uint64{0, 1, 2, 3, 4}},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "int16", FldName: "op", TypeSize: 2}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "semop_flags", FldName: "flg", TypeSize: 2}}, Vals: []uint64{2048, 4096}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "semop_flags", FldName: "flg", TypeSize: 2}}, Vals: []uint64{2048, 4096}, BitMask: true},
 	}}},
 	{Key: StructKey{Name: "semid_ds"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "semid_ds", TypeSize: 88}, Fields: []Type{
 		&StructType{Key: StructKey{Name: "ipc_perm"}, FldName: "perm"},
@@ -219,7 +219,7 @@ var structDescs_amd64 = []*KeyedStruct{
 		&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", IsVarlen: true}, Type: &StructType{Key: StructKey{Name: "cmsghdr"}}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "bytesize", FldName: "msg_controllen", TypeSize: 8}}, BitSize: 8, Buf: "msg_control"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "msg_flags", TypeSize: 4}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 4}}, IsPad: true},
 	}}},
 	{Key: StructKey{Name: "shmid_ds"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "shmid_ds", TypeSize: 112}, Fields: []Type{
@@ -286,23 +286,23 @@ var structDescs_amd64 = []*KeyedStruct{
 		&StructType{Key: StructKey{Name: "sockaddr_un_abstract", Dir: 1}, FldName: "abs"},
 	}}},
 	{Key: StructKey{Name: "sockaddr_un_abstract"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "sockaddr_un_abstract", TypeSize: 8}, Fields: []Type{
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2}}, Vals: []uint64{1, 0}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2}}, Vals: []uint64{1, 0}, BitMask: true},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "ind", TypeSize: 1}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 1}}, IsPad: true},
 		&ProcType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "proc", FldName: "id", TypeSize: 4}}, ValuesStart: 20000, ValuesPerProc: 4},
 	}}},
 	{Key: StructKey{Name: "sockaddr_un_abstract", Dir: 1}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "sockaddr_un_abstract", TypeSize: 8, ArgDir: 1}, Fields: []Type{
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2, ArgDir: 1}}, Vals: []uint64{1, 0}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2, ArgDir: 1}}, Vals: []uint64{1, 0}, BitMask: true},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "ind", TypeSize: 1, ArgDir: 1}}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pad", TypeSize: 1}}, IsPad: true},
 		&ProcType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "proc", FldName: "id", TypeSize: 4, ArgDir: 1}}, ValuesStart: 20000, ValuesPerProc: 4},
 	}}},
 	{Key: StructKey{Name: "sockaddr_un_file"}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "sockaddr_un_file", IsVarlen: true}, Fields: []Type{
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2}}, Vals: []uint64{1, 0}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2}}, Vals: []uint64{1, 0}, BitMask: true},
 		&BufferType{TypeCommon: TypeCommon{TypeName: "filename", FldName: "path", IsVarlen: true}, Kind: 3},
 	}}},
 	{Key: StructKey{Name: "sockaddr_un_file", Dir: 1}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "sockaddr_un_file", ArgDir: 1, IsVarlen: true}, Fields: []Type{
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2, ArgDir: 1}}, Vals: []uint64{1, 0}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unix_socket_family", FldName: "family", TypeSize: 2, ArgDir: 1}}, Vals: []uint64{1, 0}, BitMask: true},
 		&BufferType{TypeCommon: TypeCommon{TypeName: "filename", FldName: "path", ArgDir: 1, IsVarlen: true}, Kind: 3},
 	}}},
 	{Key: StructKey{Name: "stat", Dir: 1}, Desc: &StructDesc{TypeCommon: TypeCommon{TypeName: "stat", TypeSize: 112, ArgDir: 1}, Fields: []Type{
@@ -406,7 +406,7 @@ var syscalls_amd64 = []*Syscall{
 	}},
 	{NR: 15, Name: "chmod", CallName: "chmod", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}},
 	{NR: 16, Name: "chown", CallName: "chown", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
@@ -426,7 +426,7 @@ var syscalls_amd64 = []*Syscall{
 	}},
 	{NR: 477, Name: "clock_nanosleep", CallName: "clock_nanosleep", Args: []Type{
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "clock_id", FldName: "id", TypeSize: 8}}, Vals: []uint64{0, 3, 1073741824, 536870912, 1, 2}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "timer_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "timer_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "rqtp", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "timespec"}}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "rmtp", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "timespec", Dir: 1}}},
 	}},
@@ -472,21 +472,21 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 462, Name: "faccessat", CallName: "faccessat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "dirfd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "pathname", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "faccessat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{256, 512}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "faccessat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{256, 512}, BitMask: true},
 	}},
 	{NR: 13, Name: "fchdir", CallName: "fchdir", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 	}},
 	{NR: 124, Name: "fchmod", CallName: "fchmod", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}},
 	{NR: 463, Name: "fchmodat", CallName: "fchmodat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "dirfd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "at_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "at_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024}, BitMask: true},
 	}},
 	{NR: 123, Name: "fchown", CallName: "fchown", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
@@ -498,14 +498,14 @@ var syscalls_amd64 = []*Syscall{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "uid", FldName: "uid", TypeSize: 4}},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "gid", FldName: "gid", TypeSize: 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "at_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "at_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024}, BitMask: true},
 	}},
 	{NR: 297, Name: "fchroot", CallName: "fchroot", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 	}},
 	{NR: 92, Name: "fcntl$dupfd", CallName: "fcntl", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fcntl_dupfd", FldName: "cmd", TypeSize: 8}}, Vals: []uint64{0, 12}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fcntl_dupfd", FldName: "cmd", TypeSize: 8}}, Vals: []uint64{0, 12}, BitMask: true},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "arg", TypeSize: 4}},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 92, Name: "fcntl$getflags", CallName: "fcntl", Args: []Type{
@@ -524,7 +524,7 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 92, Name: "fcntl$setflags", CallName: "fcntl", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "cmd", TypeSize: 8}}, Val: 2},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fcntl_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fcntl_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{1}, BitMask: true},
 	}},
 	{NR: 92, Name: "fcntl$setown", CallName: "fcntl", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
@@ -534,14 +534,14 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 92, Name: "fcntl$setstatus", CallName: "fcntl", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "cmd", TypeSize: 8}}, Val: 4},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fcntl_status", FldName: "flags", TypeSize: 8}}, Vals: []uint64{8, 64, 4, 65536, 131072, 262144, 524288, 16777216}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fcntl_status", FldName: "flags", TypeSize: 8}}, Vals: []uint64{8, 64, 4, 65536, 131072, 262144, 524288, 16777216}, BitMask: true},
 	}},
 	{NR: 241, Name: "fdatasync", CallName: "fdatasync", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 	}},
 	{NR: 131, Name: "flock", CallName: "flock", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "flock_op", FldName: "op", TypeSize: 8}}, Vals: []uint64{1, 2, 8, 4}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "flock_op", FldName: "op", TypeSize: 8}}, Vals: []uint64{1, 2, 8, 4}, BitMask: true},
 	}},
 	{NR: 95, Name: "fsync", CallName: "fsync", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
@@ -597,7 +597,7 @@ var syscalls_amd64 = []*Syscall{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "rlim", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "rlimit", Dir: 1}}},
 	}},
 	{NR: 445, Name: "getrusage", CallName: "getrusage", Args: []Type{
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "rusage_who", FldName: "who", TypeSize: 8}}, Vals: []uint64{0, 18446744073709551615}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "rusage_who", FldName: "who", TypeSize: 8}}, Vals: []uint64{0, 18446744073709551615}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "usage", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "rusage", Dir: 1}}},
 	}},
 	{NR: 32, Name: "getsockname", CallName: "getsockname", Args: []Type{
@@ -637,7 +637,7 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 118, Name: "getsockopt$inet_opts", CallName: "getsockopt", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_in", FldName: "fd", TypeSize: 4}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "level", TypeSize: 8}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sockopt_opt_ip_opts", FldName: "optname", TypeSize: 8}}, Vals: []uint64{1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sockopt_opt_ip_opts", FldName: "optname", TypeSize: 8}}, Vals: []uint64{1}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "optval", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1, IsVarlen: true}}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "optlen", TypeSize: 8}, Type: &LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", TypeSize: 4, ArgDir: 2}}, Buf: "optval"}},
 	}},
@@ -684,7 +684,7 @@ var syscalls_amd64 = []*Syscall{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "old", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "newfd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "new", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "linkat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "linkat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{1024}, BitMask: true},
 	}},
 	{NR: 106, Name: "listen", CallName: "listen", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
@@ -693,7 +693,7 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 199, Name: "lseek", CallName: "lseek", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fileoff", FldName: "offset", TypeSize: 8}}, Kind: 1},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "seek_whence", FldName: "whence", TypeSize: 8}}, Vals: []uint64{0, 1, 2}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "seek_whence", FldName: "whence", TypeSize: 8}}, Vals: []uint64{0, 1, 2}, BitMask: true},
 	}},
 	{NR: 441, Name: "lstat", CallName: "lstat", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
@@ -711,12 +711,12 @@ var syscalls_amd64 = []*Syscall{
 	}},
 	{NR: 136, Name: "mkdir", CallName: "mkdir", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "path", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}},
 	{NR: 461, Name: "mkdirat", CallName: "mkdirat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "path", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}},
 	{NR: 450, Name: "mknod", CallName: "mknod", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
@@ -739,13 +739,13 @@ var syscalls_amd64 = []*Syscall{
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "size", TypeSize: 8}}, Buf: "addr"},
 	}},
 	{NR: 242, Name: "mlockall", CallName: "mlockall", Args: []Type{
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mlockall_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{1, 2}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mlockall_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{1, 2}, BitMask: true},
 	}},
 	{NR: 197, Name: "mmap", CallName: "mmap", Args: []Type{
 		&VmaType{TypeCommon: TypeCommon{TypeName: "vma", FldName: "addr", TypeSize: 8}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "addr"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mmap_prot", FldName: "prot", TypeSize: 8}}, Vals: []uint64{4, 1, 2, 0}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mmap_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{4096, 0, 16, 512, 128, 1024, 2048, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mmap_prot", FldName: "prot", TypeSize: 8}}, Vals: []uint64{4, 1, 2, 0}, BitMask: true},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mmap_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{4096, 0, 16, 512, 128, 1024, 2048, 2, 1}, BitMask: true},
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "fd", TypeSize: 4}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "pad", TypeSize: 8}}},
 		&IntType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "fileoff", FldName: "offset", TypeSize: 8}}, Kind: 1},
@@ -753,7 +753,7 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 74, Name: "mprotect", CallName: "mprotect", Args: []Type{
 		&VmaType{TypeCommon: TypeCommon{TypeName: "vma", FldName: "addr", TypeSize: 8}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "addr"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mmap_prot", FldName: "prot", TypeSize: 8}}, Vals: []uint64{4, 1, 2, 0}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "mmap_prot", FldName: "prot", TypeSize: 8}}, Vals: []uint64{4, 1, 2, 0}, BitMask: true},
 	}},
 	{NR: 444, Name: "msgctl$IPC_RMID", CallName: "msgctl", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_msq", FldName: "msqid", TypeSize: 4}},
@@ -771,24 +771,24 @@ var syscalls_amd64 = []*Syscall{
 	}},
 	{NR: 225, Name: "msgget", CallName: "msgget", Args: []Type{
 		&ProcType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "proc", FldName: "key", TypeSize: 8}}, ValuesStart: 2039379027, ValuesPerProc: 4},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_msq", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 225, Name: "msgget$private", CallName: "msgget", Args: []Type{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "key", TypeSize: 8}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_msq", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 227, Name: "msgrcv", CallName: "msgrcv", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_msq", FldName: "msqid", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msgp", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "msgbuf", Dir: 1}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "sz", TypeSize: 8}}, Buf: "msgp"},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgbuf_type", FldName: "typ", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgrcv_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{2048, 4096}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgrcv_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{2048, 4096}, BitMask: true},
 	}},
 	{NR: 226, Name: "msgsnd", CallName: "msgsnd", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_msq", FldName: "msqid", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msgp", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "msgbuf"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "sz", TypeSize: 8}}, Buf: "msgp"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgsnd_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{2048}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "msgsnd_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{2048}, BitMask: true},
 	}},
 	{NR: 204, Name: "munlock", CallName: "munlock", Args: []Type{
 		&VmaType{TypeCommon: TypeCommon{TypeName: "vma", FldName: "addr", TypeSize: 8}},
@@ -805,32 +805,32 @@ var syscalls_amd64 = []*Syscall{
 	}},
 	{NR: 5, Name: "open", CallName: "open", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 8, 512, 1024, 2048, 16, 32, 256, 4194304, 16777216, 65536, 128, 131072, 262144, 32768, 524288, 2097152, 64}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 8, 512, 1024, 2048, 16, 32, 256, 4194304, 16777216, 65536, 128, 131072, 262144, 32768, 524288, 2097152, 64}, BitMask: true},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 5, Name: "open$dir", CallName: "open", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 8, 512, 1024, 2048, 16, 32, 256, 4194304, 16777216, 65536, 128, 131072, 262144, 32768, 524288, 2097152, 64}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 8, 512, 1024, 2048, 16, 32, 256, 4194304, 16777216, 65536, 128, 131072, 262144, 32768, 524288, 2097152, 64}, BitMask: true},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 468, Name: "openat", CallName: "openat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "fd", TypeSize: 4, IsOptional: true}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "file", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 8, 512, 1024, 2048, 16, 32, 256, 4194304, 16777216, 65536, 128, 131072, 262144, 32768, 524288, 2097152, 64}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 8, 512, 1024, 2048, 16, 32, 256, 4194304, 16777216, 65536, 128, 131072, 262144, 32768, 524288, 2097152, 64}, BitMask: true},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "open_mode", FldName: "mode", TypeSize: 8}}, Vals: []uint64{256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "fd", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 456, Name: "paccept", CallName: "paccept", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "peer", TypeSize: 8, IsOptional: true}, Type: &UnionType{Key: StructKey{Name: "sockaddr_storage", Dir: 1}}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "peerlen", TypeSize: 8}, Type: &LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", TypeSize: 4, ArgDir: 2}}, Buf: "peer"}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "accept_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{536870912, 268435456, 1073741824}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "accept_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{536870912, 268435456, 1073741824}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 42, Name: "pipe", CallName: "pipe", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "pipefd", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "pipefd", Dir: 1}}},
 	}},
 	{NR: 453, Name: "pipe2", CallName: "pipe2", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "pipefd", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "pipefd", Dir: 1}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pipe_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{4, 4194304, 16777216}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "pipe_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{4, 4194304, 16777216}, BitMask: true},
 	}},
 	{NR: 209, Name: "poll", CallName: "poll", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "fds", TypeSize: 8}, Type: &ArrayType{TypeCommon: TypeCommon{TypeName: "array", IsVarlen: true}, Type: &StructType{Key: StructKey{Name: "pollfd"}}}},
@@ -874,7 +874,7 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1, IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &UnionType{Key: StructKey{Name: "sockaddr_storage"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -882,7 +882,7 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_in", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1, IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "sockaddr_in"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -890,7 +890,7 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_in6", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1, IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "sockaddr_in6"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -898,14 +898,14 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_unix", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{ArgDir: 1, IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &UnionType{Key: StructKey{Name: "sockaddr_un"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
 	{NR: 27, Name: "recvmsg", CallName: "recvmsg", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "recv_msghdr"}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "recv_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{2048, 1, 2, 64}, BitMask: true},
 	}},
 	{NR: 128, Name: "rename", CallName: "rename", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "old", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
@@ -989,12 +989,12 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 221, Name: "semget", CallName: "semget", Args: []Type{
 		&ProcType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "proc", FldName: "key", TypeSize: 8}}, ValuesStart: 2039359027, ValuesPerProc: 4},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sem_sem_id", FldName: "nsems", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 3, 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "semget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "semget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_sem", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 221, Name: "semget$private", CallName: "semget", Args: []Type{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "key", TypeSize: 8}}},
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sem_sem_id", FldName: "nsems", TypeSize: 8}}, Vals: []uint64{0, 1, 2, 3, 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "semget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "semget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_sem", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 222, Name: "semop", CallName: "semop", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_sem", FldName: "semid", TypeSize: 4}},
@@ -1004,18 +1004,18 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 28, Name: "sendmsg", CallName: "sendmsg", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "send_msghdr"}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 	}},
 	{NR: 28, Name: "sendmsg$unix", CallName: "sendmsg", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_unix", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "msg", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "msghdr_un"}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 	}},
 	{NR: 133, Name: "sendto", CallName: "sendto", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &UnionType{Key: StructKey{Name: "sockaddr_storage"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -1023,7 +1023,7 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_in", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "sockaddr_in"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -1031,7 +1031,7 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_in6", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &StructType{Key: StructKey{Name: "sockaddr_in6"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -1039,7 +1039,7 @@ var syscalls_amd64 = []*Syscall{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_unix", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "buf", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "len", TypeSize: 8}}, Buf: "buf"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "send_flags", FldName: "f", TypeSize: 8}}, Vals: []uint64{1, 2, 4, 8, 1024}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "addr", TypeSize: 8, IsOptional: true}, Type: &UnionType{Key: StructKey{Name: "sockaddr_un"}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "addrlen", TypeSize: 8}}, Buf: "addr"},
 	}},
@@ -1108,7 +1108,7 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 105, Name: "setsockopt$inet_opts", CallName: "setsockopt", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock_in", FldName: "fd", TypeSize: 4}},
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "level", TypeSize: 8}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sockopt_opt_ip_opts", FldName: "optname", TypeSize: 8}}, Vals: []uint64{1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "sockopt_opt_ip_opts", FldName: "optname", TypeSize: 8}}, Vals: []uint64{1}, BitMask: true},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "buffer", FldName: "optval", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{IsVarlen: true}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "optlen", TypeSize: 8}}, Buf: "optval"},
 	}},
@@ -1146,7 +1146,7 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 228, Name: "shmat", CallName: "shmat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_shm", FldName: "shmid", TypeSize: 4}},
 		&VmaType{TypeCommon: TypeCommon{TypeName: "vma", FldName: "addr", TypeSize: 8}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shmat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{8192, 4096}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shmat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{8192, 4096}, BitMask: true},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "shmaddr", FldName: "ret", TypeSize: 8, ArgDir: 1}}},
 	{NR: 443, Name: "shmctl$IPC_RMID", CallName: "shmctl", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_shm", FldName: "shmid", TypeSize: 4}},
@@ -1176,18 +1176,18 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 231, Name: "shmget", CallName: "shmget", Args: []Type{
 		&ProcType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "proc", FldName: "key", TypeSize: 8}}, ValuesStart: 2039339027, ValuesPerProc: 4},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "size", TypeSize: 8}}, Buf: "unused"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shmget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shmget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 		&VmaType{TypeCommon: TypeCommon{TypeName: "vma", FldName: "unused", TypeSize: 8}},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_shm", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 231, Name: "shmget$private", CallName: "shmget", Args: []Type{
 		&ConstType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "const", FldName: "key", TypeSize: 8}}},
 		&LenType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "len", FldName: "size", TypeSize: 8}}, Buf: "unused"},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shmget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shmget_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{512, 1024, 256, 128, 64, 32, 16, 8, 4, 2, 1}, BitMask: true},
 		&VmaType{TypeCommon: TypeCommon{TypeName: "vma", FldName: "unused", TypeSize: 8}},
 	}, Ret: &ResourceType{TypeCommon: TypeCommon{TypeName: "ipc_shm", FldName: "ret", TypeSize: 4, ArgDir: 1}}},
 	{NR: 134, Name: "shutdown", CallName: "shutdown", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "sock", FldName: "fd", TypeSize: 4}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shutdown_flags", FldName: "how", TypeSize: 8}}, Vals: []uint64{0, 1, 2}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "shutdown_flags", FldName: "how", TypeSize: 8}}, Vals: []uint64{0, 1, 2}, BitMask: true},
 	}},
 	{NR: 394, Name: "socket", CallName: "socket", Args: []Type{
 		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "socket_domain", FldName: "domain", TypeSize: 8}}, Vals: []uint64{1, 2, 24, 6, 31, 16}},
@@ -1257,13 +1257,13 @@ var syscalls_amd64 = []*Syscall{
 	{NR: 471, Name: "unlinkat", CallName: "unlinkat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "fd", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "path", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unlinkat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 2048}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "unlinkat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 2048}, BitMask: true},
 	}},
 	{NR: 467, Name: "utimensat", CallName: "utimensat", Args: []Type{
 		&ResourceType{TypeCommon: TypeCommon{TypeName: "fd_dir", FldName: "dir", TypeSize: 4}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "pathname", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "times", TypeSize: 8}, Type: &StructType{Key: StructKey{Name: "itimerval"}}},
-		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "utimensat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 512}},
+		&FlagsType{IntTypeCommon: IntTypeCommon{TypeCommon: TypeCommon{TypeName: "utimensat_flags", FldName: "flags", TypeSize: 8}}, Vals: []uint64{0, 512}, BitMask: true},
 	}},
 	{NR: 420, Name: "utimes", CallName: "utimes", Args: []Type{
 		&PtrType{TypeCommon: TypeCommon{TypeName: "ptr", FldName: "filename", TypeSize: 8}, Type: &BufferType{TypeCommon: TypeCommon{TypeName: "filename", IsVarlen: true}, Kind: 3}},
@@ -1673,4 +1673,4 @@ var consts_amd64 = []ConstValue{
 	{Name: "WUNTRACED", Value: 2},
 }
 
-const revision_amd64 = "1c3f97d7ba7aa2f74ff155a040df838ef118c890"
+const revision_amd64 = "06c0b32b546c6ae12f28b30331f8fac32b0a81bf"