On Mon, 26 Aug 2024 12:12:17 +0530, Madhavan Srinivasan wrote:

If a function name is greater than 63 char long, xmon command
may not find them. For example, here is a test that
executed an illegal instruction in a kernel function and one of
call stack function has name >63 char long,

cpu 0x0: Vector: 700 (Program Check) at [c00000000a6577e0]
    pc: c0000000001aacb8: check__allowed__function__name__for__symbol__r4+0x8/0x10
    lr: c00000000019c1e0: check__allowed__function__name__for__symbol__r1+0x20/0x40
    sp: c00000000a657a80
   msr: 800000000288b033
  current = 0xc00000000a439900
  paca    = 0xc000000003e90000	 irqmask: 0x03	 irq_happened: 0x01
.....
[link register   ] c00000000019c1e0 check__allowed__function__name__for__symbol__r1+0x20/0x40
[c00000000a657a80] c00000000a439900 (unreliable)
[c00000000a657aa0] c0000000001021d8 check__allowed__function__name__for__symbol__r2_resolution_symbol+0x38/0x4c
[c00000000a657ac0] c00000000019b424 power_pmu_event_init+0xa4/0xa50

[...]

Applied to powerpc/next.

[1/1] powerpc/xmon: Fix tmpstr length check in scanhex
      https://git.kernel.org/powerpc/c/0405e128110d47a40443936e68dc32d7bc4ccc0b

cheers