On Thu, Aug 21, 2014 at 11:04 PM, Christian Svensson <christ...@cmd.nu> wrote: > On Thu, Aug 21, 2014 at 9:56 PM, Joel Sherrill > <joel.sherr...@oarcorp.com> wrote: >> The sp must be updated before the memory can be used. This is just >> a bug otherwise. > > No, 128 byte redzone is an ABI thing both that OpenRISC and x86-64 have. > The bug in GCC was that redzone was not respected IIRC (if it's the > same bug that I have in mind). > >> R1 [SP] >> The stack pointer holds the limit of the current stack frame. The first 128 >> bytes below the stack pointer are reserved for leaf functions, and below >> that are undefined. Stack pointer must be word aligned at all times. > >> Christian.. can you review that code? > Could you point me to the code? I don't know exactly which code and > version is being used.
ISR_Handler code goes there: https://github.com/RTEMS/rtems/blob/master/c/src/lib/libbsp/or1k/or1ksim/start/start.S https://github.com/RTEMS/rtems/blob/master/cpukit/score/cpu/or1k/or1k-exception-handler-low.S and context switch code: https://github.com/RTEMS/rtems/blob/master/cpukit/score/cpu/or1k/or1k-context-switch.S _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
