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The r0 register holds the system_off function pointer. As r0 is a scratch register, the pointer needs to moved to a preserved register before branching to a (custom) marker function. Furthermore, in accordance to rule 6.2.1.2 of aapcs32, the stack pointer needs to align on 8 bytes. Hence r0 is pushed to the stack in addition to the lr register, before calling the public interface of checking the s2ram marker. Signed-off-by: Hessel van der Molen <hvandermolen@dexels.com> |
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| core | ||
| include | ||
| CMakeLists.txt | ||
| Kconfig | ||