diff --git a/cmd/sbox/Android.bp b/cmd/sbox/Android.bp
index d88505f..b8d75ed 100644
--- a/cmd/sbox/Android.bp
+++ b/cmd/sbox/Android.bp
@@ -21,6 +21,7 @@
     deps: [
         "sbox_proto",
         "soong-makedeps",
+        "soong-response",
     ],
     srcs: [
         "sbox.go",
diff --git a/cmd/sbox/sbox.go b/cmd/sbox/sbox.go
index f47c601..fcc80a9 100644
--- a/cmd/sbox/sbox.go
+++ b/cmd/sbox/sbox.go
@@ -32,6 +32,7 @@
 
 	"android/soong/cmd/sbox/sbox_proto"
 	"android/soong/makedeps"
+	"android/soong/response"
 
 	"github.com/golang/protobuf/proto"
 )
@@ -218,6 +219,11 @@
 		return "", fmt.Errorf("command is required")
 	}
 
+	pathToTempDirInSbox := tempDir
+	if command.GetChdir() {
+		pathToTempDirInSbox = "."
+	}
+
 	err = os.MkdirAll(tempDir, 0777)
 	if err != nil {
 		return "", fmt.Errorf("failed to create %q: %w", tempDir, err)
@@ -228,10 +234,9 @@
 	if err != nil {
 		return "", err
 	}
-
-	pathToTempDirInSbox := tempDir
-	if command.GetChdir() {
-		pathToTempDirInSbox = "."
+	err = copyRspFiles(command.RspFiles, tempDir, pathToTempDirInSbox)
+	if err != nil {
+		return "", err
 	}
 
 	if strings.Contains(rawCommand, depFilePlaceholder) {
@@ -409,6 +414,83 @@
 	return nil
 }
 
+// copyRspFiles copies rsp files into the sandbox with path mappings, and also copies the files
+// listed into the sandbox.
+func copyRspFiles(rspFiles []*sbox_proto.RspFile, toDir, toDirInSandbox string) error {
+	for _, rspFile := range rspFiles {
+		err := copyOneRspFile(rspFile, toDir, toDirInSandbox)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// copyOneRspFiles copies an rsp file into the sandbox with path mappings, and also copies the files
+// listed into the sandbox.
+func copyOneRspFile(rspFile *sbox_proto.RspFile, toDir, toDirInSandbox string) error {
+	in, err := os.Open(rspFile.GetFile())
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+
+	files, err := response.ReadRspFile(in)
+	if err != nil {
+		return err
+	}
+
+	for i, from := range files {
+		// Convert the real path of the input file into the path inside the sandbox using the
+		// path mappings.
+		to := applyPathMappings(rspFile.PathMappings, from)
+
+		// Copy the file into the sandbox.
+		err := copyOneFile(from, joinPath(toDir, to), false)
+		if err != nil {
+			return err
+		}
+
+		// Rewrite the name in the list of files to be relative to the sandbox directory.
+		files[i] = joinPath(toDirInSandbox, to)
+	}
+
+	// Convert the real path of the rsp file into the path inside the sandbox using the path
+	// mappings.
+	outRspFile := joinPath(toDir, applyPathMappings(rspFile.PathMappings, rspFile.GetFile()))
+
+	err = os.MkdirAll(filepath.Dir(outRspFile), 0777)
+	if err != nil {
+		return err
+	}
+
+	out, err := os.Create(outRspFile)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	// Write the rsp file with converted paths into the sandbox.
+	err = response.WriteRspFile(out, files)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// applyPathMappings takes a list of path mappings and a path, and returns the path with the first
+// matching path mapping applied.  If the path does not match any of the path mappings then it is
+// returned unmodified.
+func applyPathMappings(pathMappings []*sbox_proto.PathMapping, path string) string {
+	for _, mapping := range pathMappings {
+		if strings.HasPrefix(path, mapping.GetFrom()+"/") {
+			return joinPath(mapping.GetTo()+"/", strings.TrimPrefix(path, mapping.GetFrom()+"/"))
+		}
+	}
+	return path
+}
+
 // moveFiles moves files specified by a set of copy rules.  It uses os.Rename, so it is restricted
 // to moving files where the source and destination are in the same filesystem.  This is OK for
 // sbox because the temporary directory is inside the out directory.  It updates the timestamp
diff --git a/cmd/sbox/sbox_proto/sbox.pb.go b/cmd/sbox/sbox_proto/sbox.pb.go
index 79bb90c..b996481 100644
--- a/cmd/sbox/sbox_proto/sbox.pb.go
+++ b/cmd/sbox/sbox_proto/sbox.pb.go
@@ -86,10 +86,13 @@
 	CopyAfter []*Copy `protobuf:"bytes,4,rep,name=copy_after,json=copyAfter" json:"copy_after,omitempty"`
 	// An optional hash of the input files to ensure the textproto files and the sbox rule reruns
 	// when the lists of inputs changes, even if the inputs are not on the command line.
-	InputHash            *string  `protobuf:"bytes,5,opt,name=input_hash,json=inputHash" json:"input_hash,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	InputHash *string `protobuf:"bytes,5,opt,name=input_hash,json=inputHash" json:"input_hash,omitempty"`
+	// A list of files that will be copied before the sandboxed command, and whose contents should be
+	// copied as if they were listed in copy_before.
+	RspFiles             []*RspFile `protobuf:"bytes,6,rep,name=rsp_files,json=rspFiles" json:"rsp_files,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}   `json:"-"`
+	XXX_unrecognized     []byte     `json:"-"`
+	XXX_sizecache        int32      `json:"-"`
 }
 
 func (m *Command) Reset()         { *m = Command{} }
@@ -152,6 +155,13 @@
 	return ""
 }
 
+func (m *Command) GetRspFiles() []*RspFile {
+	if m != nil {
+		return m.RspFiles
+	}
+	return nil
+}
+
 // Copy describes a from-to pair of files to copy.  The paths may be relative, the root that they
 // are relative to is specific to the context the Copy is used in and will be different for
 // from and to.
@@ -211,10 +221,110 @@
 	return false
 }
 
+// RspFile describes an rspfile that should be copied into the sandbox directory.
+type RspFile struct {
+	// The path to the rsp file.
+	File *string `protobuf:"bytes,1,req,name=file" json:"file,omitempty"`
+	// A list of path mappings that should be applied to each file listed in the rsp file.
+	PathMappings         []*PathMapping `protobuf:"bytes,2,rep,name=path_mappings,json=pathMappings" json:"path_mappings,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
+	XXX_unrecognized     []byte         `json:"-"`
+	XXX_sizecache        int32          `json:"-"`
+}
+
+func (m *RspFile) Reset()         { *m = RspFile{} }
+func (m *RspFile) String() string { return proto.CompactTextString(m) }
+func (*RspFile) ProtoMessage()    {}
+func (*RspFile) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9d0425bf0de86ed1, []int{3}
+}
+
+func (m *RspFile) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RspFile.Unmarshal(m, b)
+}
+func (m *RspFile) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RspFile.Marshal(b, m, deterministic)
+}
+func (m *RspFile) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RspFile.Merge(m, src)
+}
+func (m *RspFile) XXX_Size() int {
+	return xxx_messageInfo_RspFile.Size(m)
+}
+func (m *RspFile) XXX_DiscardUnknown() {
+	xxx_messageInfo_RspFile.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RspFile proto.InternalMessageInfo
+
+func (m *RspFile) GetFile() string {
+	if m != nil && m.File != nil {
+		return *m.File
+	}
+	return ""
+}
+
+func (m *RspFile) GetPathMappings() []*PathMapping {
+	if m != nil {
+		return m.PathMappings
+	}
+	return nil
+}
+
+// PathMapping describes a mapping from a path outside the sandbox to the path inside the sandbox.
+type PathMapping struct {
+	From                 *string  `protobuf:"bytes,1,req,name=from" json:"from,omitempty"`
+	To                   *string  `protobuf:"bytes,2,req,name=to" json:"to,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *PathMapping) Reset()         { *m = PathMapping{} }
+func (m *PathMapping) String() string { return proto.CompactTextString(m) }
+func (*PathMapping) ProtoMessage()    {}
+func (*PathMapping) Descriptor() ([]byte, []int) {
+	return fileDescriptor_9d0425bf0de86ed1, []int{4}
+}
+
+func (m *PathMapping) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_PathMapping.Unmarshal(m, b)
+}
+func (m *PathMapping) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_PathMapping.Marshal(b, m, deterministic)
+}
+func (m *PathMapping) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_PathMapping.Merge(m, src)
+}
+func (m *PathMapping) XXX_Size() int {
+	return xxx_messageInfo_PathMapping.Size(m)
+}
+func (m *PathMapping) XXX_DiscardUnknown() {
+	xxx_messageInfo_PathMapping.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_PathMapping proto.InternalMessageInfo
+
+func (m *PathMapping) GetFrom() string {
+	if m != nil && m.From != nil {
+		return *m.From
+	}
+	return ""
+}
+
+func (m *PathMapping) GetTo() string {
+	if m != nil && m.To != nil {
+		return *m.To
+	}
+	return ""
+}
+
 func init() {
 	proto.RegisterType((*Manifest)(nil), "sbox.Manifest")
 	proto.RegisterType((*Command)(nil), "sbox.Command")
 	proto.RegisterType((*Copy)(nil), "sbox.Copy")
+	proto.RegisterType((*RspFile)(nil), "sbox.RspFile")
+	proto.RegisterType((*PathMapping)(nil), "sbox.PathMapping")
 }
 
 func init() {
@@ -222,22 +332,27 @@
 }
 
 var fileDescriptor_9d0425bf0de86ed1 = []byte{
-	// 268 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x64, 0x90, 0x4f, 0x4b, 0xc3, 0x40,
-	0x10, 0xc5, 0xc9, 0x9f, 0xd2, 0x64, 0x6a, 0x7b, 0x18, 0x3c, 0xec, 0x45, 0x09, 0x01, 0x21, 0x45,
-	0xe8, 0xc1, 0x6f, 0x60, 0xf5, 0x20, 0x82, 0x97, 0x1c, 0x45, 0x08, 0x9b, 0x64, 0x43, 0x02, 0x4d,
-	0x26, 0xec, 0x6e, 0xa0, 0xfd, 0x56, 0x7e, 0x44, 0xd9, 0x49, 0x2a, 0x82, 0xb7, 0x99, 0xdf, 0xe3,
-	0xcd, 0x7b, 0x0c, 0x80, 0x29, 0xe9, 0x7c, 0x18, 0x35, 0x59, 0xc2, 0xd0, 0xcd, 0xe9, 0x17, 0x44,
-	0x1f, 0x72, 0xe8, 0x1a, 0x65, 0x2c, 0xee, 0x21, 0xaa, 0xa8, 0xef, 0xe5, 0x50, 0x1b, 0xe1, 0x25,
-	0x41, 0xb6, 0x79, 0xda, 0x1e, 0xd8, 0xf0, 0x32, 0xd3, 0xfc, 0x57, 0xc6, 0x07, 0xd8, 0xd1, 0x64,
-	0xc7, 0xc9, 0x16, 0xb5, 0x1a, 0x9b, 0xee, 0xa4, 0x84, 0x9f, 0x78, 0x59, 0x9c, 0x6f, 0x67, 0xfa,
-	0x3a, 0xc3, 0xf4, 0xdb, 0x83, 0xf5, 0x62, 0xc6, 0x47, 0xd8, 0x54, 0x34, 0x5e, 0x8a, 0x52, 0x35,
-	0xa4, 0xd5, 0x12, 0x00, 0xd7, 0x80, 0xf1, 0x92, 0x83, 0x93, 0x8f, 0xac, 0xe2, 0x2d, 0xac, 0xaa,
-	0xb6, 0xee, 0x34, 0x9f, 0x8d, 0xf2, 0x79, 0x41, 0x01, 0xeb, 0xa5, 0x81, 0x08, 0x12, 0x3f, 0x8b,
-	0xf3, 0xeb, 0x8a, 0x7b, 0x60, 0x77, 0x21, 0x1b, 0xab, 0xb4, 0x08, 0xff, 0xdd, 0x8e, 0x9d, 0xfa,
-	0xec, 0x44, 0xbc, 0x03, 0xe8, 0x06, 0xd7, 0xbc, 0x95, 0xa6, 0x15, 0x2b, 0xae, 0x1d, 0x33, 0x79,
-	0x93, 0xa6, 0x4d, 0xdf, 0x21, 0x74, 0x0e, 0x44, 0x08, 0x1b, 0x4d, 0xbd, 0xf0, 0x38, 0x88, 0x67,
-	0xdc, 0x81, 0x6f, 0x49, 0xf8, 0x4c, 0x7c, 0x4b, 0x78, 0x0f, 0xa0, 0xce, 0xaa, 0x9a, 0xac, 0x2c,
-	0x4f, 0x4a, 0x04, 0x5c, 0xf5, 0x0f, 0x39, 0xde, 0x7c, 0xf2, 0xc3, 0x0b, 0x7e, 0xf8, 0x4f, 0x00,
-	0x00, 0x00, 0xff, 0xff, 0x78, 0x37, 0x3e, 0x6a, 0x7d, 0x01, 0x00, 0x00,
+	// 342 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x92, 0x5f, 0x4b, 0xc3, 0x30,
+	0x14, 0xc5, 0x69, 0xd7, 0xb9, 0xf6, 0xee, 0x0f, 0x18, 0x7c, 0xc8, 0x8b, 0x32, 0x0a, 0xc2, 0xa6,
+	0x30, 0xd0, 0x07, 0xdf, 0x9d, 0x22, 0x22, 0x0c, 0x24, 0xe0, 0x8b, 0x08, 0x25, 0xeb, 0x52, 0x5b,
+	0x58, 0x9b, 0x90, 0x64, 0xb0, 0x7d, 0x57, 0x3f, 0x8c, 0xe4, 0xa6, 0xd3, 0x82, 0x2f, 0xbe, 0xdd,
+	0x7b, 0x0e, 0xf7, 0xdc, 0x5f, 0xc2, 0x05, 0x30, 0x6b, 0xb9, 0x5f, 0x28, 0x2d, 0xad, 0x24, 0x91,
+	0xab, 0xd3, 0x0f, 0x88, 0x57, 0xbc, 0xa9, 0x0a, 0x61, 0x2c, 0x99, 0x43, 0x9c, 0xcb, 0xba, 0xe6,
+	0xcd, 0xc6, 0xd0, 0x60, 0xda, 0x9b, 0x0d, 0x6f, 0xc7, 0x0b, 0x1c, 0x78, 0xf0, 0x2a, 0xfb, 0xb1,
+	0xc9, 0x25, 0x4c, 0xe4, 0xce, 0xaa, 0x9d, 0xcd, 0x36, 0x42, 0x15, 0xd5, 0x56, 0xd0, 0x70, 0x1a,
+	0xcc, 0x12, 0x36, 0xf6, 0xea, 0xa3, 0x17, 0xd3, 0xaf, 0x00, 0x06, 0xed, 0x30, 0xb9, 0x86, 0x61,
+	0x2e, 0xd5, 0x21, 0x5b, 0x8b, 0x42, 0x6a, 0xd1, 0x2e, 0x80, 0xe3, 0x02, 0x75, 0x60, 0xe0, 0xec,
+	0x25, 0xba, 0xe4, 0x0c, 0xfa, 0x79, 0xb9, 0xa9, 0x34, 0xc6, 0xc6, 0xcc, 0x37, 0x84, 0xc2, 0xa0,
+	0x25, 0xa0, 0xbd, 0x69, 0x38, 0x4b, 0xd8, 0xb1, 0x25, 0x73, 0xc0, 0xe9, 0x8c, 0x17, 0x56, 0x68,
+	0x1a, 0xfd, 0xc9, 0x4e, 0x9c, 0x7b, 0xef, 0x4c, 0x72, 0x0e, 0x50, 0x35, 0x8e, 0xbc, 0xe4, 0xa6,
+	0xa4, 0x7d, 0xc4, 0x4e, 0x50, 0x79, 0xe6, 0xa6, 0x24, 0x57, 0x90, 0x68, 0xa3, 0x32, 0x87, 0x6f,
+	0xe8, 0x49, 0xf7, 0x17, 0x98, 0x51, 0x4f, 0xd5, 0x56, 0xb0, 0x58, 0xfb, 0xc2, 0xa4, 0x2f, 0x10,
+	0xb9, 0x74, 0x42, 0x20, 0x2a, 0xb4, 0xac, 0x69, 0x80, 0x50, 0x58, 0x93, 0x09, 0x84, 0x56, 0xd2,
+	0x10, 0x95, 0xd0, 0x4a, 0x72, 0x01, 0x20, 0xf6, 0x22, 0xdf, 0x59, 0xbe, 0xde, 0x0a, 0xda, 0xc3,
+	0x67, 0x75, 0x94, 0xf4, 0x0d, 0x06, 0xed, 0x02, 0x8c, 0x73, 0x5f, 0x7a, 0x8c, 0x73, 0xda, 0x1d,
+	0x8c, 0x15, 0xb7, 0x65, 0x56, 0x73, 0xa5, 0xaa, 0xe6, 0xd3, 0xd0, 0x10, 0xd1, 0x4e, 0x3d, 0xda,
+	0x2b, 0xb7, 0xe5, 0xca, 0x3b, 0x6c, 0xa4, 0x7e, 0x1b, 0x93, 0xde, 0xc0, 0xb0, 0x63, 0xfe, 0x87,
+	0x74, 0x39, 0x7a, 0xc7, 0x33, 0xc9, 0xf0, 0x4c, 0xbe, 0x03, 0x00, 0x00, 0xff, 0xff, 0x83, 0x82,
+	0xb0, 0xc3, 0x33, 0x02, 0x00, 0x00,
 }
diff --git a/cmd/sbox/sbox_proto/sbox.proto b/cmd/sbox/sbox_proto/sbox.proto
index 695b0e8..bdf92c6 100644
--- a/cmd/sbox/sbox_proto/sbox.proto
+++ b/cmd/sbox/sbox_proto/sbox.proto
@@ -47,6 +47,10 @@
   // An optional hash of the input files to ensure the textproto files and the sbox rule reruns
   // when the lists of inputs changes, even if the inputs are not on the command line.
   optional string input_hash = 5;
+
+  // A list of files that will be copied before the sandboxed command, and whose contents should be
+  // copied as if they were listed in copy_before.
+  repeated RspFile rsp_files = 6;
 }
 
 // Copy describes a from-to pair of files to copy.  The paths may be relative, the root that they
@@ -58,4 +62,19 @@
 
   // If true, make the file executable after copying it.
   optional bool executable = 3;
-}
\ No newline at end of file
+}
+
+// RspFile describes an rspfile that should be copied into the sandbox directory.
+message RspFile {
+  // The path to the rsp file.
+  required string file = 1;
+
+  // A list of path mappings that should be applied to each file listed in the rsp file.
+  repeated PathMapping path_mappings = 2;
+}
+
+// PathMapping describes a mapping from a path outside the sandbox to the path inside the sandbox.
+message PathMapping {
+  required string from = 1;
+  required string to = 2;
+}