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/*
* Copyright (c) 2014 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/thread.h>
#include <rtems/score/percpu.h>
#ifndef RTEMS_SMP
void __attribute__((naked)) __aeabi_read_tp(void);
void __attribute__((naked)) __aeabi_read_tp(void)
{
__asm__ volatile (
"ldr r0, =_Per_CPU_Information\n"
"ldr r0, [r0, %[executingoff]]\n"
#if defined(__thumb__) && !defined(__thumb2__)
"add r0, %[tlsareaoff]\n"
"ldr r0, [r0]\n"
#else
"ldr r0, [r0, %[tlsareaoff]]\n"
#endif
"bx lr\n"
:
: [executingoff] "I" (offsetof(Per_CPU_Control, executing)),
[tlsareaoff] "I" (offsetof(Thread_Control, Start.tls_area))
);
}
#endif /* RTEMS_SMP */
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