patrick/zephyr
1
0
Fork 0
Code Issues Pull requests Actions 8 Packages Projects Releases Wiki Activity

linker: add linker sections for thread local storage

Browse source 
This adds the tdata and tbss sections required for thread local
storage. They are in ROM area as these sections are not to be
directly accessed, but copied to thread local storage area at
thread creation.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2020-09-25 13:10:00 -07:00 committed by Andrew Boie
parent 97db4ac0ca
commit 3180fc0ecc
2 changed files with 41 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
include/linker/linker-defs.h
View file

@ -291,6 +291,18 @@ extern char z_user_stacks_start[];
extern char z_user_stacks_end[];
#endif /* CONFIG_USERSPACE */
#ifdef CONFIG_THREAD_LOCAL_STORAGE
extern char __tdata_start[];
extern char __tdata_end[];
extern char __tdata_size[];
extern char __tbss_start[];
extern char __tbss_end[];
extern char __tbss_size[];
extern char __tls_start[];
extern char __tls_end[];
extern char __tls_size[];
#endif /* CONFIG_THREAD_LOCAL_STORAGE */
#endif /* ! _ASMLANGUAGE */
#endif /* ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_ */

29
include/linker/thread-local-storage.ld Normal file
View file

@ -0,0 +1,29 @@
/* SPDX-License-Identifier: Apache-2.0 */
SECTION_DATA_PROLOGUE(tdata,,)
{
*(.tdata .tdata.* .gnu.linkonce.td.*);
} GROUP_LINK_IN(ROMABLE_REGION)
SECTION_DATA_PROLOGUE(tbss,,)
{
*(.tbss .tbss.* .gnu.linkonce.tb.* .tcommon);
} GROUP_LINK_IN(ROMABLE_REGION)
/*
* These needs to be outside of the tdata/tbss
* sections or else they would be considered
* thread-local variables, and the code would use
* the wrong values.
*/
PROVIDE(__tdata_start = LOADADDR(tdata));
PROVIDE(__tdata_size = SIZEOF(tdata));
PROVIDE(__tdata_end = __tdata_start + __tdata_size);
PROVIDE(__tbss_start = LOADADDR(tbss));
PROVIDE(__tbss_size = SIZEOF(tbss));
PROVIDE(__tbss_end = __tbss_start + __tbss_size);
PROVIDE(__tls_start = __tdata_start);
PROVIDE(__tls_end = __tbss_end);
PROVIDE(__tls_size = __tbss_end - __tdata_start);