[PATCH 2/2] libdl: Use _CPU_Get_TLS_thread_pointer()

[Sebastian Huber]

Update #4920.
---
 cpukit/libdl/rtl-tls.c | 73 ++++--------------------------------------
 1 file changed, 6 insertions(+), 67 deletions(-)

diff --git a/cpukit/libdl/rtl-tls.c b/cpukit/libdl/rtl-tls.c
index 95ca47fe6a..7eb12831eb 100644
--- a/cpukit/libdl/rtl-tls.c
+++ b/cpukit/libdl/rtl-tls.c
@@ -13,6 +13,8 @@
 /*
  *  COPYRIGHT (c) 2023 Chris Johns <chrisj at rtems.org>
  *
+ * Copyright (C) 2023 embedded brains GmbH & Co. KG
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
@@ -41,74 +43,11 @@
 
 #include "rtl-tls.h"
 
-/*
- * The cpukit/score should provide a call for any arch that
- * supports TLS. This code is here until that happens if it
- * happens.
- */
-
-/*
- * Pasted in from:
- *
- * https://android.googlesource.com/platform/bionic/+/refs/heads/main/libc/platform/bionic/tls.h
- *
- * Note, "#pragma once" has been removed
- */
-/*
- * Copyright (C) 2008 The Android Open Source Project
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-#if defined(__aarch64__)
-# define __get_tls() ({ void** __val; __asm__("mrs %0, tpidr_el0" : "=r"(__val)); __val; })
-#elif defined(__arm__)
-# define __get_tls() ({ void** __val; __asm__("mrc p15, 0, %0, c13, c0, 3" : "=r"(__val)); __val; })
-#elif defined(__i386__)
-# define __get_tls() ({ void** __val; __asm__("movl %%gs:0, %0" : "=r"(__val)); __val; })
-#elif defined(__riscv)
-# define __get_tls() ({ void** __val; __asm__("mv %0, tp" : "=r"(__val)); __val; })
-#elif defined(__x86_64__)
-# define __get_tls() ({ void** __val; __asm__("mov %%fs:0, %0" : "=r"(__val)); __val; })
-#elif defined(__sparc__)
-#include <stdint.h>
-# define __get_tls() ({ void** __val; register uintptr_t g7 __asm__( "g7" ); __val = (void**) g7; __val; })
-#elif defined(__powerpc__)
-#include <stdint.h>
-# define __get_tls() ({ void** __val; register uintptr_t tp __asm__( "2" ); __val = (void**) tp; __val; })
-#elif defined(__m68k__) || defined(__v850__) || defined(__microblaze__)
-/* No TLS support */
-# define __get_tls() (void*) 0UL
-#else
-#error unsupported architecture
-#endif
-
-#if defined(__get_tls)
+#include <rtems/score/cpuimpl.h>
+#include <rtems/score/percpu.h>
+#include <rtems/score/thread.h>
 
 void* rtems_rtl_tls_get_base (void)
 {
-  return (void*) __get_tls();
+  return _CPU_Get_TLS_thread_pointer (&_Thread_Get_executing()->Registers);
 }
-
-#endif
-- 
2.35.3