Enabling INFRA_DEBUG crashes my "rocket"...
As far as I can tell the DSR runs run on the thread stack and not the interrupt stack(from inside interrupt_end). Also, as long as the interrupt handling in a HAL does not support interrupt nesting, then there is no point in adding support for an interrupt stack as a single level ISR probably uses less stack than a DSR anyway. DSR's don't nest. However, any DSR that uses a non-trivial amount of stack is *nasty* as all threads in the system then needs to have enough stack to accomodate that DSR. This gets even nastier as there is no way for a DSR to enforce all threads to have this extra amount of stack. The thing that I don't understand is why there is no DSR stack.... DSR's can be interrupted by ISR's but not by threads, so presumably the requirement to be on the interrupted threads stack arises *after* the DSR's have run? My system crashes when I enable INFRA_DEBUG because an assert is triggered during a DSR where diag_printf() is invoked and this blows the stack. Initially with the DHCP client in the FreeBSD tcp/ip stack for which I submitted a patch that got accepted a while ago, but other thread suffer the same faith. http://ecos.sourceware.org/docs-2.0/ref/hal-default-interrupt-handling.html -- Øyvind Harboe http://www.zylin.com - eCos ARM & FPGA developer kit -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
