The backtrace is now nested, and should be used together with the stack
pointer array to construct the full backtrace for each exception.
We now allocate exception objects in a stack, but their names are still
not allocated. This is fine for exceptions raised in the driver or artiq
code, but we will have to implement allocation for names of exceptions
raised in RPC calls. The compiler should also emit code to store the
exception names once they catch it, to prepare for later reraising.
Port of 4a6bea479a
Co-authored-by: Steve Fan <sf@m-labs.hk>
Reviewed-on: #156
Co-authored-by: stevefan1999 <sf@m-labs.hk>
Co-committed-by: stevefan1999 <sf@m-labs.hk>
The previous method of taking the channel could cause deadlock, we now
use semaphore to signal if the channel is available instead of busy
polling the mutex.
* Changed the KERNEL_CHANNEL_* to Mutex<T> with proper type, remove the
need for unsafe.
* Exposed a const pointer to KernelImage, with UnsafeCell holding
the library field for unbind with interior mutability.
* Cache flush should be done before playback instead when getting the
handler.
* `csr::rtio_dma::enable_read()` would loop forever, probably bug in the
gateware.
mwojcik
pca006132
stevefan1999
Sebastien Bourdeauducq
Astro