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arch: arm: expose start/end limits of the thread priv stack section

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We introduce linker symbols to hold the start and end address of
the memory area holding the thread privilege stack buffers,
applicable when building with support for User Mode.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>
This commit is contained in:
Ioannis Glaropoulos 2019-06-14 09:08:11 +02:00 • committed by Andrew Boie
commit f15c12d482
2 changed files with 13 additions and 0 deletions
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11
include/linker/linker-defs.h
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@ -252,6 +252,17 @@ extern char _ramfunc_ram_size[];
extern char _ramfunc_rom_start[];
#endif /* CONFIG_ARCH_HAS_RAMFUNC_SUPPORT */
/* Memory owned by the kernel. Memory region for thread privilege stack buffers,
* currently only applicable on ARM Cortex-M architecture when building with
* support for User Mode.
*
* All thread privilege stack buffers will be placed into this section.
*/
#ifdef CONFIG_USERSPACE
extern char z_priv_stacks_ram_start[];
extern char z_priv_stacks_ram_end[];
#endif /* CONFIG_USERSPACE */
#endif /* ! _ASMLANGUAGE */
#endif /* ZEPHYR_INCLUDE_LINKER_LINKER_DEFS_H_ */