text: // Copyright 2015 The Go Authors.  All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  #include <string.h> /* for strerror */
  #include <pthread.h>
  #include <signal.h>
  #include "libcgo.h"
  
  static void* threadentry(void*);
  static pthread_key_t k1;
  
  #define magic1 (0x23581321U)
  
  static void
  inittls(void)
  {
  	uint32 x;
  	pthread_key_t tofree[128], k;
  	int i, ntofree;
  
  	/*
  	 * Same logic, code as gcc_android_amd64.c:/inittls.
  	 * Note that this is a temporary hack that should be fixed soon.
  	 *
  	 * TODO: fix this.
  	 *
  	 * The linker and runtime hard-code this constant offset
  	 * from %gs where we expect to find g. Disgusting.
  	 *
  	 * Known to src/cmd/link/internal/ld/sym.go:/0xf8
  	 * and to src/runtime/sys_linux_386.s:/0xf8 or /GOOS_android.
  	 * TODO(hyangah): check 0xb0 works with API23+
  	 *
  	 * As disgusting as on the darwin/386, darwin/amd64.
  	 */
  	ntofree = 0;
  	for(;;) {
  		if(pthread_key_create(&k, nil) < 0) {
  			fprintf(stderr, "runtime/cgo: pthread_key_create failed\n");
  			abort();
  		}
  		pthread_setspecific(k, (void*)magic1);
  		asm volatile("movl %%gs:0xf8, %0" : "=r"(x));
  		pthread_setspecific(k, 0);
  		if (x == magic1) {
  			k1 = k;
  			break;
  		}
  		if(ntofree >= nelem(tofree)) {
  			fprintf(stderr, "runtime/cgo: could not obtain pthread_keys\n");
  			fprintf(stderr, "\ttried");
  			for(i=0; i<ntofree; i++)
  				fprintf(stderr, " %#x", (unsigned)tofree[i]);
  			fprintf(stderr, "\n");
  			abort();
  		}
  		tofree[ntofree++] = k;
  	}
  	// TODO: output to stderr is not useful for apps.
  	// Can we fall back to Android's log library?
  
  	/*
  	 * We got the key we wanted.  Free the others.
  	 */
  	for(i=0; i<ntofree; i++) {
  		pthread_key_delete(tofree[i]);
  	}
  }
  
  
  static void*
  threadentry(void *v)
  {
  	ThreadStart ts;
  
  	ts = *(ThreadStart*)v;
  	free(v);
  
  	pthread_setspecific(k1, (void*)ts.g);
  
  	crosscall_386(ts.fn);
  	return nil;
  }
  
  void (*x_cgo_inittls)(void) = inittls;
  void* (*x_cgo_threadentry)(void*) = threadentry;
  