diff --git a/libc/cmake/modules/LLVMLibCTestRules.cmake b/libc/cmake/modules/LLVMLibCTestRules.cmake
--- a/libc/cmake/modules/LLVMLibCTestRules.cmake
+++ b/libc/cmake/modules/LLVMLibCTestRules.cmake
@@ -58,6 +58,7 @@
 # Usage
 #    add_libc_unittest(
 #      <target name>
+#      [REDIRECTED] <Specified if dependencies need libllvmlibc_redirectors.so>
 #      SUITE <name of the suite this test belongs to>
 #      SRCS  <list of .cpp files for the test>
 #      HDRS  <list of .h files for the test>
@@ -71,7 +72,7 @@
 
   cmake_parse_arguments(
     "LIBC_UNITTEST"
-    "" # No optional arguments
+    "REDIRECTED" # Optional arguments
     "SUITE" # Single value arguments
     "SRCS;HDRS;DEPENDS;COMPILE_OPTIONS" # Multi-value arguments
     ${ARGN}
@@ -144,6 +145,22 @@
     ${fq_deps_list}
   )
 
+  if(LIBC_UNITTEST_REDIRECTED)
+    find_library(
+      libc_redirectors
+      llvmlibc_redirectors
+      PATHS ${LIBC_BUILD_DIR}/lib
+    )
+    target_link_libraries(
+      ${fq_target_name}
+      PRIVATE
+      ${libc_redirectors}
+    )
+    add_dependencies(
+      ${fq_target_name}
+      llvmlibc_redirectors
+    )
+  endif()
   target_link_libraries(${fq_target_name} PRIVATE LibcUnitTest libc_test_utils)
 
   add_custom_command(
diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -31,6 +31,7 @@
     libc.src.stdlib.abs
     libc.src.stdlib.labs
     libc.src.stdlib.llabs
+    libc.src.stdlib.malloc
 
     # string.h entrypoints
     libc.src.string.bzero
diff --git a/libc/config/linux/api.td b/libc/config/linux/api.td
--- a/libc/config/linux/api.td
+++ b/libc/config/linux/api.td
@@ -213,6 +213,9 @@
 }
 
 def StdlibAPI : PublicAPI<"stdlib.h"> {
+  let TypeDeclarations = [
+    SizeT,
+  ];
 }
 
 def TimeAPI : PublicAPI<"time.h"> {
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -46,6 +46,7 @@
     libc.src.stdlib.abs
     libc.src.stdlib.labs
     libc.src.stdlib.llabs
+    libc.src.stdlib.malloc
 
     # string.h entrypoints
     libc.src.string.bzero
diff --git a/libc/lib/CMakeLists.txt b/libc/lib/CMakeLists.txt
--- a/libc/lib/CMakeLists.txt
+++ b/libc/lib/CMakeLists.txt
@@ -9,3 +9,9 @@
   DEPENDS
   ${TARGET_LIBM_ENTRYPOINTS}
 )
+
+add_redirector_library(
+  llvmlibc_redirectors
+  DEPENDS
+    malloc_redirector
+)
diff --git a/libc/spec/stdc.td b/libc/spec/stdc.td
--- a/libc/spec/stdc.td
+++ b/libc/spec/stdc.td
@@ -426,13 +426,16 @@
   HeaderSpec StdLib = HeaderSpec<
       "stdlib.h",
       [], // Macros
-      [], // Types
+      [ // Types
+          SizeTType,
+      ],
       [], // Enumerations
       [
           FunctionSpec<"abort", RetValSpec<NoReturn>, [ArgSpec<VoidType>]>,
           FunctionSpec<"abs", RetValSpec<IntType>, [ArgSpec<IntType>]>,
           FunctionSpec<"labs", RetValSpec<LongType>, [ArgSpec<LongType>]>,
           FunctionSpec<"llabs", RetValSpec<LongLongType>, [ArgSpec<LongLongType>]>,
+          FunctionSpec<"malloc", RetValSpec<VoidPtr>, [ArgSpec<SizeTType>]>,
           FunctionSpec<"_Exit", RetValSpec<NoReturn>, [ArgSpec<IntType>]>,
       ]
   >;
diff --git a/libc/src/stdlib/CMakeLists.txt b/libc/src/stdlib/CMakeLists.txt
--- a/libc/src/stdlib/CMakeLists.txt
+++ b/libc/src/stdlib/CMakeLists.txt
@@ -56,3 +56,18 @@
   DEPENDS
     .abs_utils
 )
+
+add_entrypoint_object(
+  malloc
+  REDIRECTED
+  SRCS
+    malloc.cpp
+  HDRS
+    malloc.h
+)
+
+add_redirector_object(
+  malloc_redirector
+  SRC
+    malloc_redirector.cpp
+)
diff --git a/libc/src/stdlib/malloc.h b/libc/src/stdlib/malloc.h
new file mode 100644
--- /dev/null
+++ b/libc/src/stdlib/malloc.h
@@ -0,0 +1,20 @@
+//===-- Implementation header for malloc ------------------------*- 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_STDLIB_MALLOC_H
+#define LLVM_LIBC_SRC_STDLIB_MALLOC_H
+
+#include <stddef.h> // size_t
+
+namespace __llvm_libc {
+
+void *malloc(size_t size);
+
+} // namespace __llvm_libc
+
+#endif // LLVM_LIBC_SRC_STDLIB_MALLOC_H
diff --git a/libc/src/stdlib/malloc.cpp b/libc/src/stdlib/malloc.cpp
new file mode 100644
--- /dev/null
+++ b/libc/src/stdlib/malloc.cpp
@@ -0,0 +1,23 @@
+//===-- Implementation of malloc ------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// TODO: Add implementation of malloc and remove malloc redirector.
+
+#include "src/stdlib/malloc.h"
+#include "src/__support/common.h"
+#include <stddef.h> // size_t
+
+namespace __llvm_libc {
+
+void *__malloc_redirector(size_t size);
+
+LLVM_LIBC_FUNCTION(void *, malloc, (size_t size)) {
+  return __malloc_redirector(size);
+}
+
+} // namespace __llvm_libc
diff --git a/libc/src/stdlib/malloc_redirector.cpp b/libc/src/stdlib/malloc_redirector.cpp
new file mode 100644
--- /dev/null
+++ b/libc/src/stdlib/malloc_redirector.cpp
@@ -0,0 +1,19 @@
+//===-- Implementation of malloc redirector -------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// TODO: Remove the malloc redirector once LLVM-libc has the implementation
+// for malloc.
+
+#include <cstdlib>  // malloc
+#include <stddef.h> // size_t
+
+namespace __llvm_libc {
+
+void *__malloc_redirector(size_t size) { return ::malloc(size); }
+
+} // namespace __llvm_libc
diff --git a/libc/test/src/stdlib/CMakeLists.txt b/libc/test/src/stdlib/CMakeLists.txt
--- a/libc/test/src/stdlib/CMakeLists.txt
+++ b/libc/test/src/stdlib/CMakeLists.txt
@@ -54,3 +54,15 @@
   DEPENDS
     libc.src.stdlib.llabs
 )
+
+add_libc_unittest(
+  malloc_test
+  REDIRECTED
+  SUITE
+    libc_stdlib_unittests
+  SRCS
+    malloc_test.cpp
+  DEPENDS
+    libc.src.stdlib.malloc
+    libc.src.stdlib.free
+)
diff --git a/libc/test/src/stdlib/malloc_test.cpp b/libc/test/src/stdlib/malloc_test.cpp
new file mode 100644
--- /dev/null
+++ b/libc/test/src/stdlib/malloc_test.cpp
@@ -0,0 +1,24 @@
+//===-- Unittests for malloc ----------------------------------------------===//
+//
+// 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/stdlib/free.h"
+#include "src/stdlib/malloc.h"
+#include "utils/UnitTest/Test.h"
+
+TEST(LlvmLibcMallocTest, MallocInt) {
+  int *pi = static_cast<int *>(__llvm_libc::malloc(sizeof(int)));
+  *pi = 1;
+  EXPECT_EQ(*pi, 1);
+  __llvm_libc::free(pi);
+}
+
+// Making sure the result returned from malloc(0) could be freed.
+TEST(LlvmLibcMallocTest, MallocZero) {
+  void *p = __llvm_libc::malloc(0);
+  __llvm_libc::free(p);
+}