diff --git a/fastboot/bootimg_utils.cpp b/fastboot/bootimg_utils.cpp
index e433787..46d4bd3 100644
--- a/fastboot/bootimg_utils.cpp
+++ b/fastboot/bootimg_utils.cpp
@@ -34,25 +34,27 @@
 #include <stdlib.h>
 #include <string.h>
 
-void bootimg_set_cmdline(boot_img_hdr_v1* h, const std::string& cmdline) {
+void bootimg_set_cmdline(boot_img_hdr_v2* h, const std::string& cmdline) {
     if (cmdline.size() >= sizeof(h->cmdline)) die("command line too large: %zu", cmdline.size());
     strcpy(reinterpret_cast<char*>(h->cmdline), cmdline.c_str());
 }
 
-boot_img_hdr_v1* mkbootimg(const std::vector<char>& kernel, const std::vector<char>& ramdisk,
-                           const std::vector<char>& second, size_t base, const boot_img_hdr_v1& src,
-                           std::vector<char>* out) {
+boot_img_hdr_v2* mkbootimg(const std::vector<char>& kernel, const std::vector<char>& ramdisk,
+                           const std::vector<char>& second, const std::vector<char>& dtb,
+                           size_t base, const boot_img_hdr_v2& src, std::vector<char>* out) {
     const size_t page_mask = src.page_size - 1;
 
     int64_t header_actual = (sizeof(boot_img_hdr_v1) + page_mask) & (~page_mask);
     int64_t kernel_actual = (kernel.size() + page_mask) & (~page_mask);
     int64_t ramdisk_actual = (ramdisk.size() + page_mask) & (~page_mask);
     int64_t second_actual = (second.size() + page_mask) & (~page_mask);
+    int64_t dtb_actual = (dtb.size() + page_mask) & (~page_mask);
 
-    int64_t bootimg_size = header_actual + kernel_actual + ramdisk_actual + second_actual;
+    int64_t bootimg_size =
+            header_actual + kernel_actual + ramdisk_actual + second_actual + dtb_actual;
     out->resize(bootimg_size);
 
-    boot_img_hdr_v1* hdr = reinterpret_cast<boot_img_hdr_v1*>(out->data());
+    boot_img_hdr_v2* hdr = reinterpret_cast<boot_img_hdr_v2*>(out->data());
 
     *hdr = src;
     memcpy(hdr->magic, BOOT_MAGIC, BOOT_MAGIC_SIZE);
@@ -66,13 +68,19 @@
     hdr->second_addr += base;
     hdr->tags_addr += base;
 
-    if (hdr->header_version != 0) {
+    if (hdr->header_version == 1) {
         hdr->header_size = sizeof(boot_img_hdr_v1);
+    } else if (hdr->header_version == 2) {
+        hdr->header_size = sizeof(boot_img_hdr_v2);
+        hdr->dtb_size = dtb.size();
+        hdr->dtb_addr += base;
     }
 
     memcpy(hdr->magic + hdr->page_size, kernel.data(), kernel.size());
     memcpy(hdr->magic + hdr->page_size + kernel_actual, ramdisk.data(), ramdisk.size());
     memcpy(hdr->magic + hdr->page_size + kernel_actual + ramdisk_actual, second.data(),
            second.size());
+    memcpy(hdr->magic + hdr->page_size + kernel_actual + ramdisk_actual + second_actual, dtb.data(),
+           dtb.size());
     return hdr;
 }
diff --git a/fastboot/bootimg_utils.h b/fastboot/bootimg_utils.h
index a4e8870..b7cf9bd 100644
--- a/fastboot/bootimg_utils.h
+++ b/fastboot/bootimg_utils.h
@@ -35,7 +35,7 @@
 #include <string>
 #include <vector>
 
-boot_img_hdr_v1* mkbootimg(const std::vector<char>& kernel, const std::vector<char>& ramdisk,
-                           const std::vector<char>& second, size_t base, const boot_img_hdr_v1& src,
-                           std::vector<char>* out);
-void bootimg_set_cmdline(boot_img_hdr_v1* h, const std::string& cmdline);
+boot_img_hdr_v2* mkbootimg(const std::vector<char>& kernel, const std::vector<char>& ramdisk,
+                           const std::vector<char>& second, const std::vector<char>& dtb,
+                           size_t base, const boot_img_hdr_v2& src, std::vector<char>* out);
+void bootimg_set_cmdline(boot_img_hdr_v2* h, const std::string& cmdline);
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index d753f0f..17cab3a 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -92,8 +92,9 @@
 static int64_t target_sparse_limit = -1;
 
 static unsigned g_base_addr = 0x10000000;
-static boot_img_hdr_v1 g_boot_img_hdr = {};
+static boot_img_hdr_v2 g_boot_img_hdr = {};
 static std::string g_cmdline;
+static std::string g_dtb_path;
 
 static bool g_disable_verity = false;
 static bool g_disable_verification = false;
@@ -394,11 +395,13 @@
             "                            Download and boot kernel from RAM.\n"
             " flash:raw PARTITION KERNEL [RAMDISK [SECOND]]\n"
             "                            Create boot image and flash it.\n"
+            " --dtb DTB                  Specify path to DTB for boot image header version 2.\n"
             " --cmdline CMDLINE          Override kernel command line.\n"
             " --base ADDRESS             Set kernel base address (default: 0x10000000).\n"
             " --kernel-offset            Set kernel offset (default: 0x00008000).\n"
             " --ramdisk-offset           Set ramdisk offset (default: 0x01000000).\n"
             " --tags-offset              Set tags offset (default: 0x00000100).\n"
+            " --dtb-offset               Set dtb offset (default: 0x01100000).\n"
             " --page-size BYTES          Set flash page size (default: 2048).\n"
             " --header-version VERSION   Set boot image header version.\n"
             " --os-version MAJOR[.MINOR[.PATCH]]\n"
@@ -448,12 +451,12 @@
     }
 
     // Is this actually a boot image?
-    if (kernel_data.size() < sizeof(boot_img_hdr_v1)) {
+    if (kernel_data.size() < sizeof(boot_img_hdr_v2)) {
         die("cannot load '%s': too short", kernel.c_str());
     }
     if (!memcmp(kernel_data.data(), BOOT_MAGIC, BOOT_MAGIC_SIZE)) {
         if (!g_cmdline.empty()) {
-            bootimg_set_cmdline(reinterpret_cast<boot_img_hdr_v1*>(kernel_data.data()), g_cmdline);
+            bootimg_set_cmdline(reinterpret_cast<boot_img_hdr_v2*>(kernel_data.data()), g_cmdline);
         }
 
         if (!ramdisk.empty()) die("cannot boot a boot.img *and* ramdisk");
@@ -474,15 +477,26 @@
             die("cannot load '%s': %s", second_stage.c_str(), strerror(errno));
         }
     }
+
+    std::vector<char> dtb_data;
+    if (!g_dtb_path.empty()) {
+        if (g_boot_img_hdr.header_version < 2) {
+                    die("Argument dtb not supported for boot image header version %d\n",
+                        g_boot_img_hdr.header_version);
+        }
+        if (!ReadFileToVector(g_dtb_path, &dtb_data)) {
+            die("cannot load '%s': %s", g_dtb_path.c_str(), strerror(errno));
+        }
+    }
+
     fprintf(stderr,"creating boot image...\n");
 
     std::vector<char> out;
-    boot_img_hdr_v1* boot_image_data = mkbootimg(kernel_data, ramdisk_data, second_stage_data,
-                                                 g_base_addr, g_boot_img_hdr, &out);
+    boot_img_hdr_v2* boot_image_data = mkbootimg(kernel_data, ramdisk_data, second_stage_data,
+                                                 dtb_data, g_base_addr, g_boot_img_hdr, &out);
 
     if (!g_cmdline.empty()) bootimg_set_cmdline(boot_image_data, g_cmdline);
     fprintf(stderr, "creating boot image - %zu bytes\n", out.size());
-
     return out;
 }
 
@@ -1586,6 +1600,7 @@
     g_boot_img_hdr.second_addr = 0x00f00000;
     g_boot_img_hdr.tags_addr = 0x00000100;
     g_boot_img_hdr.page_size = 2048;
+    g_boot_img_hdr.dtb_addr = 0x01100000;
 
     const struct option longopts[] = {
         {"base", required_argument, 0, 0},
@@ -1605,6 +1620,8 @@
         {"skip-secondary", no_argument, 0, 0},
         {"slot", required_argument, 0, 0},
         {"tags-offset", required_argument, 0, 0},
+        {"dtb", required_argument, 0, 0},
+        {"dtb-offset", required_argument, 0, 0},
         {"unbuffered", no_argument, 0, 0},
         {"verbose", no_argument, 0, 'v'},
         {"version", no_argument, 0, 0},
@@ -1632,6 +1649,8 @@
                 force_flash = true;
             } else if (name == "header-version") {
                 g_boot_img_hdr.header_version = strtoul(optarg, nullptr, 0);
+            } else if (name == "dtb") {
+                g_dtb_path = optarg;
             } else if (name == "kernel-offset") {
                 g_boot_img_hdr.kernel_addr = strtoul(optarg, 0, 16);
             } else if (name == "os-patch-level") {
@@ -1649,6 +1668,8 @@
                 skip_secondary = true;
             } else if (name == "slot") {
                 slot_override = optarg;
+            } else if (name == "dtb-offset") {
+                g_boot_img_hdr.dtb_addr = strtoul(optarg, 0, 16);
             } else if (name == "tags-offset") {
                 g_boot_img_hdr.tags_addr = strtoul(optarg, 0, 16);
             } else if (name == "unbuffered") {
@@ -1828,7 +1849,6 @@
             if (!args.empty()) ramdisk = next_arg(&args);
             std::string second_stage;
             if (!args.empty()) second_stage = next_arg(&args);
-
             auto data = LoadBootableImage(kernel, ramdisk, second_stage);
             fb->Download("boot.img", data);
             fb->Boot();
diff --git a/rootdir/etc/ld.config.legacy.txt b/rootdir/etc/ld.config.legacy.txt
index 83eb3b6..a416825 100644
--- a/rootdir/etc/ld.config.legacy.txt
+++ b/rootdir/etc/ld.config.legacy.txt
@@ -35,11 +35,11 @@
 # APEX related namespaces.
 ###############################################################################
 
-additional.namespaces = runtime,conscrypt,media
+additional.namespaces = runtime,conscrypt,media,resolv
 
 # Keep in sync with ld.config.txt in the com.android.runtime APEX.
-namespace.default.links = runtime
-namespace.default.asan.links = runtime
+namespace.default.links = runtime,resolv
+namespace.default.asan.links = runtime,resolv
 # Visible because some libraries are dlopen'ed, e.g. libopenjdk is dlopen'ed by
 # libart.
 namespace.default.visible = true
@@ -49,12 +49,15 @@
 namespace.default.link.runtime.shared_libs += libnativehelper.so
 namespace.default.link.runtime.shared_libs += libnativeloader.so
 
+namespace.default.link.resolv.shared_libs = libnetd_resolv.so
+
 ###############################################################################
 # "runtime" APEX namespace
 #
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 ###############################################################################
 namespace.runtime.isolated = true
+namespace.runtime.visible = true
 
 # Keep in sync with ld.config.txt in the com.android.runtime APEX.
 namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
@@ -99,6 +102,22 @@
 namespace.conscrypt.link.default.shared_libs += libdl.so
 
 ###############################################################################
+# "resolv" APEX namespace
+#
+# This namespace is for libraries within the resolv APEX.
+###############################################################################
+namespace.resolv.isolated = true
+namespace.resolv.visible = true
+
+namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
+namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
+namespace.resolv.links = default
+namespace.resolv.link.default.shared_libs  = libc.so
+namespace.resolv.link.default.shared_libs += libm.so
+namespace.resolv.link.default.shared_libs += libdl.so
+namespace.resolv.link.default.shared_libs += libbinder_ndk.so
+
+###############################################################################
 # Namespace config for binaries under /postinstall.
 # Only one default namespace is defined and it has no directories other than
 # /system/lib and /product/lib in the search paths. This is because linker
diff --git a/rootdir/etc/ld.config.txt b/rootdir/etc/ld.config.txt
index 05f75bf..d0e84df 100644
--- a/rootdir/etc/ld.config.txt
+++ b/rootdir/etc/ld.config.txt
@@ -28,7 +28,7 @@
 dir.postinstall = /postinstall
 
 [system]
-additional.namespaces = runtime,conscrypt,media,sphal,vndk,rs
+additional.namespaces = runtime,conscrypt,media,resolv,sphal,vndk,rs
 
 ###############################################################################
 # "default" namespace
@@ -73,7 +73,6 @@
 namespace.default.permitted.paths += /%PRODUCT_SERVICES%/priv-app
 namespace.default.permitted.paths += /data
 namespace.default.permitted.paths += /mnt/expand
-namespace.default.permitted.paths += /apex/com.android.resolv/${LIB}
 
 namespace.default.asan.search.paths  = /data/asan/system/${LIB}
 namespace.default.asan.search.paths +=           /system/${LIB}
@@ -105,10 +104,9 @@
 namespace.default.asan.permitted.paths += /%PRODUCT_SERVICES%/app
 namespace.default.asan.permitted.paths += /%PRODUCT_SERVICES%/priv-app
 namespace.default.asan.permitted.paths += /mnt/expand
-namespace.default.asan.permitted.paths += /apex/com.android.resolv/${LIB}
 
 # Keep in sync with ld.config.txt in the com.android.runtime APEX.
-namespace.default.links = runtime
+namespace.default.links = runtime,resolv
 # Visible because some libraries are dlopen'ed, e.g. libopenjdk is dlopen'ed by
 # libart.
 namespace.default.visible = true
@@ -118,12 +116,15 @@
 namespace.default.link.runtime.shared_libs += libnativehelper.so
 namespace.default.link.runtime.shared_libs += libnativeloader.so
 
+namespace.default.link.resolv.shared_libs = libnetd_resolv.so
+
 ###############################################################################
 # "runtime" APEX namespace
 #
 # This namespace exposes externally accessible libraries from the Runtime APEX.
 ###############################################################################
 namespace.runtime.isolated = true
+namespace.runtime.visible = true
 
 # Keep in sync with ld.config.txt in the com.android.runtime APEX.
 namespace.runtime.search.paths = /apex/com.android.runtime/${LIB}
@@ -168,6 +169,22 @@
 namespace.conscrypt.link.default.shared_libs += libdl.so
 
 ###############################################################################
+# "resolv" APEX namespace
+#
+# This namespace is for libraries within the resolv APEX.
+###############################################################################
+namespace.resolv.isolated = true
+namespace.resolv.visible = true
+
+namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
+namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
+namespace.resolv.links = default
+namespace.resolv.link.default.shared_libs  = libc.so
+namespace.resolv.link.default.shared_libs += libm.so
+namespace.resolv.link.default.shared_libs += libdl.so
+namespace.resolv.link.default.shared_libs += libbinder_ndk.so
+
+###############################################################################
 # "sphal" namespace
 #
 # SP-HAL(Sameprocess-HAL)s are the only vendor libraries that are allowed to be
diff --git a/rootdir/etc/ld.config.vndk_lite.txt b/rootdir/etc/ld.config.vndk_lite.txt
index 335369e..d2c0f2e 100644
--- a/rootdir/etc/ld.config.vndk_lite.txt
+++ b/rootdir/etc/ld.config.vndk_lite.txt
@@ -28,7 +28,7 @@
 dir.postinstall = /postinstall
 
 [system]
-additional.namespaces = runtime,conscrypt,media,sphal,vndk,rs
+additional.namespaces = runtime,conscrypt,media,resolv,sphal,vndk,rs
 
 ###############################################################################
 # "default" namespace
@@ -57,7 +57,7 @@
 
 # Keep in sync with the platform namespace in the com.android.runtime APEX
 # ld.config.txt.
-namespace.default.links = runtime
+namespace.default.links = runtime,resolv
 # Visible because some libraries are dlopen'ed, e.g. libopenjdk is dlopen'ed by
 # libart.
 namespace.default.visible = true
@@ -66,12 +66,15 @@
 namespace.default.link.runtime.shared_libs += libnativehelper.so
 namespace.default.link.runtime.shared_libs += libnativeloader.so
 
+namespace.default.link.resolv.shared_libs = libnetd_resolv.so
+
 ###############################################################################
 # "runtime" APEX namespace
 #
 # This namespace pulls in externally accessible libs from the Runtime APEX.
 ###############################################################################
 namespace.runtime.isolated = true
+namespace.runtime.visible = true
 
 # Keep in sync with the default namespace in the com.android.runtime APEX
 # ld.config.txt.
@@ -117,6 +120,22 @@
 namespace.conscrypt.link.default.shared_libs += libdl.so
 
 ###############################################################################
+# "resolv" APEX namespace
+#
+# This namespace is for libraries within the resolv APEX.
+###############################################################################
+namespace.resolv.isolated = true
+namespace.resolv.visible = true
+
+namespace.resolv.search.paths = /apex/com.android.resolv/${LIB}
+namespace.resolv.asan.search.paths = /apex/com.android.resolv/${LIB}
+namespace.resolv.links = default
+namespace.resolv.link.default.shared_libs  = libc.so
+namespace.resolv.link.default.shared_libs += libm.so
+namespace.resolv.link.default.shared_libs += libdl.so
+namespace.resolv.link.default.shared_libs += libbinder_ndk.so
+
+###############################################################################
 # "sphal" namespace
 #
 # SP-HAL(Sameprocess-HAL)s are the only vendor libraries that are allowed to be