Hi, I cannot run libbsd on real hardware because the cadence rx descriptor cache coherent allocation crashes in `memset`. It is used to clear the memory.
The rtemsbsd allocator call optionally clears the memory and it seems the newlib aarch64 memset code crashes when doing this. A basic loop with 8bit or 32bit writes does not crash. The memset call happily clears an array in cached memory with different offsets. I have posted a patch to spcache01 that generates the crash on Versal and ZynqMP hardware. The crash dump is: test cache coherent allocation clear cache coherent with memset: 0x1fe00050 *** FATAL *** fatal source: 9 (RTEMS_FATAL_SOURCE_EXCEPTION) X0 = 0x000000001fe00050 X17 = 0x000000000000000c X1 = 0x0000000000000000 X18 = 0x00000000100007b0 X2 = 0x0000000000000110 X19 = 0x000000001fe00050 X3 = 0x000000001fe000c0 X20 = 0x000000001fdfff80 X4 = 0x000000001fe00250 X21 = 0x0000000010013ab0 X5 = 0x0000000000000004 X22 = 0x0000000000000000 X6 = 0x0000000000000001 X23 = 0x00000000ffffffff X7 = 0x0000000000000000 X24 = 0x0000000010103140 X8 = 0x0000000000000000 X25 = 0x0000000000000000 X9 = 0xffffff80ffffffc8 X26 = 0x0000000000000000 X10 = 0x0000000000000000 X27 = 0x0000000000000000 X11 = 0x000000001010ca78 X28 = 0x0000000000000000 X12 = 0x0000000000000001 FP = 0x000000001010cc30 X13 = 0x000000001fe00050 LR = 0x0000000010001f94 X14 = 0x0000000000000000 SP = 0x000000001010cc30 X15 = 0x0000000000000004 PC = 0x00000000100125c0 X16 = 0x000000001000f700 DAIF = 0x00000000000003c0 VEC = 0x0000000000000004 CPSR = 0x0000000060000005 ESR = EC: 0b100101 IL: 0b1 ISS: 0b0000000000000000001100001 Data Abort taken without a change in Exception level FAR = 0x000000001fe000c0 FPCR = 0x0000000000000000 FPSR = 0x0000000000000010 The Versal (A72) fails in exactly the same way. The allocated address is 0x1fe00050 and the FAR is 0x1fe000c0 so I am not sure if the "0xc0 - 0x50" section is aligning the pointer to a larger word size for better performance and that first part is OK but the different word size breaks. Chris _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel