The push/pop_gpr routines currently do not work with the (cfg.enable_nested_interrupt) code as the user stack pointer gets overwritten. Change the routines to push the USP to the kernel stack, then pop it back off when restoring program state.
Also see https://github.com/lowRISC/ibex/pull/1875
GregAC
commented
2 years ago
The
push/pop_gprroutines currently do not work with the (cfg.enable_nested_interrupt) code as the user stack pointer gets overwritten. Change the routines to push the USP to the kernel stack, then pop it back off when restoring program state. Also see https://github.com/lowRISC/ibex/pull/1875