Hello, world\n I have a question about the use of trap 4 by RTEMS on Sparc32 (leon3). Since our app needs FP, we set the PSR[EF] bit during the boot process before RTEMS is invoked. Since we don't expect the fp_disabled trap (4) to occur, we install a fatal handler for it with rtems_interrupt_catch(&fatalTrapHandler, 4, &old);
However, the fatalTrapHandler is invoked a short time after application start (we use the Init() task and start a handful of additional tasks, all of which have attribute RTEMS_FLOATING_POINT) and the PSR[EF] bit is indeed cleared. None of our tasks clears that bit, so we suspect RTEMS does it for some reason. Question: is an RTEMS/sparc application allowed to install a handler for trap 4? I could not find an answer in the docs for SPARC Specific Information. Thanks for any insight! Regards, Jens ________________________________ Tesat-Spacecom GmbH & Co. KG Sitz: Backnang; Registergericht: Amtsgericht Stuttgart HRA 270977 Persoenlich haftender Gesellschafter: Tesat-Spacecom Geschaeftsfuehrungs GmbH; Sitz: Backnang; Registergericht: Amtsgericht Stuttgart HRB 271658; Geschaeftsfuehrung: Dr. Marc Steckling, Kerstin Basche, Ralf Zimmermann [banner]
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