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The current CC2538 linker script in Contiki places the vector table at the beginning of the flash memory / .text output section. However, this location is arbitrary (the only requirement is that the vector table is 512-byte aligned), and custom linker scripts may be used with Contiki, which means that Contiki may be used with a vector table placed elsewhere. Thus, using the flash/.text start address in the CCA and as the default NVIC VTABLE value was wrong. This commit rather uses the address of the vectors[] array from startup-gcc.c, which makes it possible to freely move around the vector table without breaking anything or having to use a custom startup-gcc.c and to configure the NVIC driver for that. Moreover, referencing the vectors[] array naturally prevents it and its input section from being garbage-collected by the linker, so this commit also removes the now-unneeded "used" and "KEEP" keywords from the vector table. Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
The Contiki Operating System
Contiki is an open source operating system that runs on tiny low-power microcontrollers and makes it possible to develop applications that make efficient use of the hardware while providing standardized low-power wireless communication for a range of hardware platforms.
Contiki is used in numerous commercial and non-commercial systems, such as city sound monitoring, street lights, networked electrical power meters, industrial monitoring, radiation monitoring, construction site monitoring, alarm systems, remote house monitoring, and so on.
For more information, see the Contiki website: