ARMv8 trigger core dump

Hi,

We need to trigger a dump via the use of ARMV8 instructions but we have not found a reliable way of doing this. We have tried the following:

• set the PSTATE flags via MSR DAIFClr, #0b1111
• Instigate an Illegal Vector Table Fetch

  • // Relocate vector table to illegal address
    ldr x3, 0xE000ED00
    mov x2, #0x1000000
    str x2, [x3, #8]

    // Trigger PendSV exception to read invalid vector
    ldr x3, 0xE000ED00
    mov x2, 0x10000000
    str x2, [x3, #4]
    isb
    nop
    dsb sy
    nop

This is after stopping all cores and then restarting them after issuing these instructions.

Question is, is there a better way to force a dump?