diff --git a/libc/config/gpu/api.td b/libc/config/gpu/api.td
--- a/libc/config/gpu/api.td
+++ b/libc/config/gpu/api.td
@@ -1,6 +1,7 @@
 include "config/public_api.td"
 
 include "spec/stdc.td"
+include "spec/gpu_ext.td"
 
 def StringAPI : PublicAPI<"string.h"> {
   let Types = ["size_t"];
diff --git a/libc/config/gpu/entrypoints.txt b/libc/config/gpu/entrypoints.txt
--- a/libc/config/gpu/entrypoints.txt
+++ b/libc/config/gpu/entrypoints.txt
@@ -79,6 +79,9 @@
     libc.src.stdio.stdin
     libc.src.stdio.stdout
     libc.src.stdio.stderr
+
+    # gpu/rpc.h entrypoints
+    libc.src.gpu.rpc_reset
 )
 
 set(TARGET_LLVMLIBC_ENTRYPOINTS
diff --git a/libc/config/gpu/headers.txt b/libc/config/gpu/headers.txt
--- a/libc/config/gpu/headers.txt
+++ b/libc/config/gpu/headers.txt
@@ -5,4 +5,7 @@
     libc.include.errno
     libc.include.stdlib
     libc.include.stdio
+
+    # Header for RPC extensions
+    libc.include.gpu_rpc
 )
diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -487,6 +487,18 @@
     .llvm-libc-types.wchar_t
 )
 
+if(LIBC_TARGET_ARCHITECTURE_IS_GPU)
+  file(MAKE_DIRECTORY "gpu")
+
+  add_gen_header(
+    gpu_rpc
+    DEF_FILE gpu/rpc.h.def
+    GEN_HDR gpu/rpc.h
+    DEPENDS
+      .llvm_libc_common_h
+  )
+endif()
+
 if(NOT LLVM_LIBC_FULL_BUILD)
   # We don't install headers in non-fullbuild mode.
   return()
diff --git a/libc/include/gpu/rpc.h.def b/libc/include/gpu/rpc.h.def
new file mode 100644
--- /dev/null
+++ b/libc/include/gpu/rpc.h.def
@@ -0,0 +1,16 @@
+//===-- GPU header rpc.h --------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_GPU_RPC_H
+#define LLVM_LIBC_GPU_RPC_H
+
+#include <__llvm-libc-common.h>
+
+%%public_api()
+
+#endif // LLVM_LIBC_GPU_RPC_H
diff --git a/libc/spec/gpu_ext.td b/libc/spec/gpu_ext.td
new file mode 100644
--- /dev/null
+++ b/libc/spec/gpu_ext.td
@@ -0,0 +1,30 @@
+def GPUExtensions : StandardSpec<"GPUExtensions"> {
+  HeaderSpec RPC = HeaderSpec<
+    "gpu/rpc.h",
+    [], // Macros
+    [], // Types
+    [
+          EnumeratedNameValue<"NOOP", "0">,
+          EnumeratedNameValue<"EXIT", "1">,
+          EnumeratedNameValue<"WRITE_TO_STDOUT", "2">,
+          EnumeratedNameValue<"WRITE_TO_STDERR", "3">,
+          EnumeratedNameValue<"WRITE_TO_STREAM", "4">,
+          EnumeratedNameValue<"MALLOC", "5">,
+          EnumeratedNameValue<"FREE", "6">,
+          // TODO: These should not be exported.
+          EnumeratedNameValue<"TEST_INCREMENT", "7">,
+          EnumeratedNameValue<"TEST_INTERFACE", "8">,
+          EnumeratedNameValue<"TEST_STREAM", "9">,
+    ], 
+    [
+        FunctionSpec<
+            "rpc_reset",
+            RetValSpec<VoidType>,
+            [ArgSpec<UnsignedIntType>, ArgSpec<VoidPtr>]
+        >,
+    ]
+  >;
+  let Headers = [
+    RPC,
+  ];
+}
diff --git a/libc/src/CMakeLists.txt b/libc/src/CMakeLists.txt
--- a/libc/src/CMakeLists.txt
+++ b/libc/src/CMakeLists.txt
@@ -20,6 +20,10 @@
   add_subdirectory(unistd)
 endif()
 
+if(${LIBC_TARGET_OS} STREQUAL "gpu")
+  add_subdirectory(gpu)
+endif()
+
 if(NOT LLVM_LIBC_FULL_BUILD)
   return()
 endif()
diff --git a/libc/src/__support/RPC/CMakeLists.txt b/libc/src/__support/RPC/CMakeLists.txt
--- a/libc/src/__support/RPC/CMakeLists.txt
+++ b/libc/src/__support/RPC/CMakeLists.txt
@@ -22,6 +22,7 @@
   HDRS
     rpc_client.h
   DEPENDS
+    libc.include.gpu_rpc
     libc.src.__support.GPU.utils
     .rpc
 )
diff --git a/libc/src/__support/RPC/rpc_client.cpp b/libc/src/__support/RPC/rpc_client.cpp
--- a/libc/src/__support/RPC/rpc_client.cpp
+++ b/libc/src/__support/RPC/rpc_client.cpp
@@ -8,6 +8,8 @@
 
 #include "rpc.h"
 
+#include <gpu/rpc.h>
+
 namespace __llvm_libc {
 namespace rpc {
 
diff --git a/libc/src/gpu/CMakeLists.txt b/libc/src/gpu/CMakeLists.txt
new file mode 100644
--- /dev/null
+++ b/libc/src/gpu/CMakeLists.txt
@@ -0,0 +1,10 @@
+add_entrypoint_object(
+  rpc_reset
+  SRCS
+    rpc_reset.cpp
+  HDRS
+    rpc_reset.h
+  DEPENDS
+    libc.src.__support.RPC.rpc_client
+    libc.src.__support.GPU.utils
+)
diff --git a/libc/src/gpu/rpc_reset.h b/libc/src/gpu/rpc_reset.h
new file mode 100644
--- /dev/null
+++ b/libc/src/gpu/rpc_reset.h
@@ -0,0 +1,18 @@
+//===-- Implementation header for RPC functions -----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_GPU_RPC_H
+#define LLVM_LIBC_SRC_GPU_RPC_H
+
+namespace __llvm_libc {
+
+void rpc_reset(unsigned int num_ports, void *buffer);
+
+} // namespace __llvm_libc
+
+#endif // LLVM_LIBC_SRC_GPU_RPC_H
diff --git a/libc/src/gpu/rpc_reset.cpp b/libc/src/gpu/rpc_reset.cpp
new file mode 100644
--- /dev/null
+++ b/libc/src/gpu/rpc_reset.cpp
@@ -0,0 +1,25 @@
+//===---------- GPU implementation of the external RPC functionion --------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/gpu/rpc_reset.h"
+
+#include "src/__support/GPU/utils.h"
+#include "src/__support/RPC/rpc_client.h"
+#include "src/__support/common.h"
+
+namespace __llvm_libc {
+
+// This is the external interface to initialize the RPC client with the
+// shared buffer.
+LLVM_LIBC_FUNCTION(void, rpc_reset,
+                   (unsigned int num_ports, void *rpc_shared_buffer)) {
+  __llvm_libc::rpc::client.reset(num_ports, __llvm_libc::gpu::get_lane_size(),
+                                 rpc_shared_buffer);
+}
+
+} // namespace __llvm_libc