Ville Juven 65cfd8a6ca riscv_syscall.S: Fix a massive bug in syscall dispatch logic ...

There is an enormous error in the system call dispatch logic; if a task
is inside a critical section (local interrupts disabled) there is a chance
that during a context switch when the task resumes, local interrupts are
erroneously ENABLED. This obviously leads to unexpected crashes and such.

This happens when the CPU status has Previous Interrupt Enable (PIE) set
to 1, even though Interrupt Enable (IE) is set to 0.

When the system call returns via ERET, the CPU sets PIE->IE and if PIE=1
interrupts get enabled.

This is fixed easily by explicitly CLEARING PIE from the register save
area, if IE=0 when the system call was started.

2024-11-08 12:51:39 -03:00

..

include

irq: force inline up_interrupt_context

2024-10-31 15:43:41 +08:00

src

riscv_syscall.S: Fix a massive bug in syscall dispatch logic

2024-11-08 12:51:39 -03:00

CMakeLists.txt

…

Kconfig

Add GCCVER define to Toolchain.cmake

2024-10-19 14:32:08 +08:00