On 07.10.22 05:44, Chris Johns wrote:
On 6/10/2022 7:23 pm, Sebastian Huber wrote:
+#if CPU_THREAD_LOCAL_STORAGE_VARIANT == 10
+ tls_data = (void *)
+ RTEMS_ALIGN_UP( (uintptr_t) tls_area + sizeof( *tcb ), alignment );
+ tcb = (TLS_Thread_control_block *) ((char *) tls_data - sizeof( *tcb ));
+ return_value = tls_data;
+#elif CPU_THREAD_LOCAL_STORAGE_VARIANT == 11
+ tcb_size = RTEMS_ALIGN_UP( sizeof( *tcb ), alignment );
+ tls_data = (void *)
+ RTEMS_ALIGN_UP( (uintptr_t) tls_area + tcb_size, alignment );
+ tcb = (TLS_Thread_control_block *) ((char *) tls_data - tcb_size);
+ return_value = tcb;
+#elif CPU_THREAD_LOCAL_STORAGE_VARIANT == 20
+ alignment_2 = RTEMS_ALIGN_UP( alignment, CPU_SIZEOF_POINTER );
+ tls_area = (void *) RTEMS_ALIGN_UP( (uintptr_t) tls_area, alignment_2 );
+ size = _TLS_Get_size();
+ tcb = (TLS_Thread_control_block *)
+ ((char *) tls_area + RTEMS_ALIGN_UP( size, alignment_2 ));
+ tls_data = (char *) tcb - RTEMS_ALIGN_UP( size, alignment );
+ return_value = tcb;
+#else
+#error "unexpected CPU_THREAD_LOCAL_STORAGE_VARIANT value"
What are the expected values? I can see 10, 11, 20.
Can this please be changed to something readable? For example:
#if CPU_THREAD_LOCAL_STORAGE_VARIANT == CPU_THREAD_LOCAL_STORAGE_BLAH
#elif CPU_THREAD_LOCAL_STORAGE_VARIANT == CPU_THREAD_LOCAL_STORAGE_BLAH_BLAH
This is documented in the no_cpu/cpuimpl.h. I think the numbers are all
right if you know the TLS variants. Otherwise we would have to add an
extra header file just for the CPU_THREAD_LOCAL_STORAGE_* defines.
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