"

In addition, crash tool will get the register values from elf/crash notes, but, only the crashing cpu register values are correct, and other cpus registers are not collected, for example:
crash> help -D
...
num_prstatus_notes: 4
notes[0]: 0
notes[1]: 270dc380 (NT_PRSTATUS)
si.signo: 0 si.code: 0 si.errno: 0
cursig: 0 sigpend: 0 sighold: 0
pid: 0 ppid: 0 pgrp: 0 sid:0
utime: 0.000000 stime: 0.000000
cutime: 0.000000 cstime: 0.000000
X0: 4000000000000000 X1: ffffc8c40d453d30 X2: ffff37436ecd0000
X3: ffffc8c40d475340 X4: 00000000000968a4 X5: 4000000000000000
X6: 4000000000000000 X7: 7fffffffffffffff X8: 0000016f2a240000
X9: ffffc8c40b0c64fc X10: 0000000000001000 X11: 00000000000000c0
X12: 0000000000000000 X13: 0000000000000072 X14: 0000000000000072
X15: 0000aaab0f98a320 X16: 0000000000000000 X17: 0000000000000000
X18: 0000000000000000 X19: 0000000000000000 X20: 0000000000000000
X21: ffffc8c40d475340 X22: ffffc8c40d460b80 X23: 00000000000000c0
X24: 00000007bf68b1b0 X25: 00000007b9284000 X26: 00000007bf68b1a8
X27: 00000007bbc95a40 X28: 00000007bbc6805a X29: ffffc8c40d453d80
LR: ffffc8c40bebd5d8 SP: ffffc8c40d453d80 PC: ffffc8c40bebd5e8
PSTATE: 60400005 FPVALID: 00000000
notes[2]: 0
notes[3]: 0
...

crash> help -r
CPU 0:
help: registers not collected for cpu 0

CPU 1:
X0: 4000000000000000 X1: ffffc8c40d453d30 X2: ffff37436ecd0000
X3: ffffc8c40d475340 X4: 00000000000968a4 X5: 4000000000000000
X6: 4000000000000000 X7: 7fffffffffffffff X8: 0000016f2a240000
X9: ffffc8c40b0c64fc X10: 0000000000001000 X11: 00000000000000c0
X12: 0000000000000000 X13: 0000000000000072 X14: 0000000000000072
X15: 0000aaab0f98a320 X16: 0000000000000000 X17: 0000000000000000
X18: 0000000000000000 X19: 0000000000000000 X20: 0000000000000000
X21: ffffc8c40d475340 X22: ffffc8c40d460b80 X23: 00000000000000c0
X24: 00000007bf68b1b0 X25: 00000007b9284000 X26: 00000007bf68b1a8
X27: 00000007bbc95a40 X28: 00000007bbc6805a X29: ffffc8c40d453d80
LR: ffffc8c40bebd5d8 SP: ffffc8c40d453d80 PC: ffffc8c40bebd5e8
PSTATE: 60400005 FPVALID: 00000000

CPU 2:
help: registers not collected for cpu 2

CPU 3:
help: registers not collected for cpu 3

This seems to be related kernel(maybe specific cases on arm64, I do not see it on X86 64), there are four cpus, only crashing cpu registers value is displayed, but non-crashing cpus registers value is not collected.

"