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In the event of a double fault, we do a HW task switch to a special _df_tss hardware task which resets the stack pointer to the interrupt stack and otherwise restores the main hardware task to a runnable state so that _df_handler_bottom() can run. However, we need to make sure that _df_handler_bottom() runs with interrupts locked, otherwise another IRQ could corrupt the interrupt stack resulting in undefined behavior. We have very little stack space to work with in this context, just zero it. It's a fatal error for the thread in any event. Fixes: #7291 Signed-off-by: Andrew Boie <andrew.p.boie@intel.com> |
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| arc | ||
| arm | ||
| common | ||
| nios2 | ||
| posix | ||
| riscv32 | ||
| x86 | ||
| x86_64 | ||
| xtensa | ||
| CMakeLists.txt | ||
| Kconfig | ||