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-rw-r--r--cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h26
1 files changed, 26 insertions, 0 deletions
diff --git a/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h b/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h
index 31ec0ac8bb..71f2679dde 100644
--- a/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h
+++ b/cpukit/score/cpu/i386/include/rtems/score/cpuimpl.h
@@ -80,6 +80,32 @@ RTEMS_INLINE_ROUTINE void _CPU_Instruction_no_operation( void )
__asm__ volatile ( "nop" );
}
+RTEMS_INLINE_ROUTINE void _CPU_Use_thread_local_storage(
+ const Context_Control *context
+)
+{
+ uint32_t tmp;
+ uint32_t cpu_index;
+
+#ifdef RTEMS_SMP
+ cpu_index = _CPU_SMP_Get_current_processor();
+#else
+ cpu_index = 0;
+#endif
+
+ __asm__ volatile (
+ "movl " RTEMS_XSTRING( I386_CONTEXT_CONTROL_GS_0_OFFSET ) "(%2), %0\n"
+ "movl %0, _Global_descriptor_table+24(,%1,8)\n"
+ "movl " RTEMS_XSTRING( I386_CONTEXT_CONTROL_GS_1_OFFSET ) "(%2), %0\n"
+ "movl %0, _Global_descriptor_table+28(,%1,8)\n"
+ "leal 24(,%1,8), %0\n"
+ "movl %0, %%gs\n"
+ : "=&r" ( tmp )
+ : "r" ( cpu_index ), "r" ( context )
+ : "memory"
+ );
+}
+
#ifdef __cplusplus
}
#endif