diff --git a/aarch64.c b/aarch64.c
new file mode 100644
index 00000000..3b00c526
--- /dev/null
+++ b/aarch64.c
@@ -0,0 +1,116 @@
+#define LIBCO_C
+#include "libco.h"
+#include "settings.h"
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static thread_local unsigned long co_active_buffer[64];
+static thread_local cothread_t co_active_handle = 0;
+static void (*co_swap)(cothread_t, cothread_t) = 0;
+
+#ifdef LIBCO_MPROTECT
+  alignas(4096)
+#else
+  section(text)
+#endif
+static const uint32_t co_swap_functin[1024] = {
+  0xa9002428,  /* stp x8,x9,[x1]        */
+  0xa9012c2a,  /* stp x10,x11,[x1,#16]  */
+  0xa902342c,  /* stp x12,x13,[x1,#32]  */
+  0xa9033c2e,  /* stp x14,x15,[x1,#48]  */
+  0xf9002433,  /* str x19,[x1,#72]      */
+  0xa9055434,  /* stp x20,x21,[x1,#80]  */
+  0xa9065c36,  /* stp x22,x23,[x1,#96]  */
+  0xa9076438,  /* stp x24,x25,[x1,#112] */
+  0xa9086c3a,  /* stp x26,x27,[x1,#128] */
+  0xa909743c,  /* stp x28,x29,[x1,#144] */
+  0x910003f0,  /* mov x16,sp            */
+  0xa90a7830,  /* stp x16,x30,[x1,#160] */
+
+  0xa9402408,  /* ldp x8,x9,[x0]        */
+  0xa9412c0a,  /* ldp x10,x11,[x0,#16]  */
+  0xa942340c,  /* ldp x12,x13,[x0,#32]  */
+  0xa9433c0e,  /* ldp x14,x15,[x0,#48]  */
+  0xf9402413,  /* ldr x19,[x0,#72]      */
+  0xa9455414,  /* ldp x20,x21,[x0,#80]  */
+  0xa9465c16,  /* ldp x22,x23,[x0,#96]  */
+  0xa9476418,  /* ldp x24,x25,[x0,#112] */
+  0xa9486c1a,  /* ldp x26,x27,[x0,#128] */
+  0xa949741c,  /* ldp x28,x29,[x0,#144] */
+  0xa94a4410,  /* ldp x16,x17,[x0,#160] */
+  0x9100021f,  /* mov sp,x16            */
+  0xd61f0220,  /* br x17                */
+};
+
+static void co_init() {
+  #ifdef LIBCO_MPROTECT
+  unsigned long addr = (unsigned long)co_swap_function;
+  unsigned long base = addr - (addr % sysconf(_SC_PAGESIZE));
+  unsigned long size = (addr - base) + sizeof co_swap_function;
+  mprotect((void*)base, size, PROT_READ | PROT_EXEC);
+  #endif
+}
+
+cothread_t co_active() {
+  if(!co_active_handle) co_active_handle = &co_active_buffer;
+  return co_active_handle;
+}
+
+cothread_t co_derive(void* memory, unsigned int size, void (*entrypoint)(void)) {
+  unsigned long* handle;
+  if(!co_swap) {
+    co_init();
+    co_swap = (void (*)(cothread_t, cothread_t))co_swap_function;
+  }
+  if(!co_active_handle) co_active_handle = &co_active_buffer;
+
+  if(handle = (unsigned long*)memory) {
+    unsigned long* p = (unsigned long*)((unsigned char*)handle + size);
+    handle[19] = (unsigned long)p;           /* x29 (frame pointer) */
+    handle[20] = (unsigned long)p;           /* x30 (stack pointer) */
+    handle[21] = (unsigned long)entrypoint;  /* x31 (link register) */
+  }
+
+  return handle;
+}
+
+cothread_t co_create(unsigned int size, void (*entrypoint)(void)) {
+  unsigned long* handle;
+  if(!co_swap) {
+    co_init();
+    co_swap = (void (*)(cothread_t, cothread_t))co_swap_function;
+  }
+  if(!co_active_handle) co_active_handle = &co_active_buffer;
+  size += 256;
+  size &= ~15;
+
+  if(handle = (unsigned long*)malloc(size)) {
+    unsigned long* p = (unsigned long*)((unsigned char*)handle + size);
+    handle[19] = (unsigned long)p;           /* x29 (frame pointer) */
+    handle[20] = (unsigned long)p;           /* x30 (stack pointer) */
+    handle[21] = (unsigned long)entrypoint;  /* x31 (link register) */
+  }
+
+  return handle;
+}
+
+void co_delete(cothread_t handle) {
+  free(handle);
+}
+
+void co_switch(cothread_t handle) {
+  cothread_t co_previous_handle = co_active_handle;
+  co_swap(co_active_handle = handle, co_previous_handle);
+}
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/libco.c b/libco.c
index 77873fa3..6f446971 100644
--- a/libco.c
+++ b/libco.c
@@ -9,6 +9,8 @@
     #include "amd64.c"
   #elif defined(__arm__)
     #include "arm.c"
+  #elif defined(__aarch64__)
+    #include "aarch64.c"
   #elif defined(_ARCH_PPC)
     #include "ppc.c"
   #elif defined(_WIN32)