Updating to head -r357419 vs. Orange Pi+ 2ed: early boot failure via uma_zalloc_arg() for cache_alloc(): Translation Fault (L1)

[Mark Millard]

After updating from head -r356426 based to
head -r357419 based, the armv7 example
crashes rather early in the boot sequence:
(a non-debug kernel context)

---<<BOOT>>---
KDB: debugger backends: ddb
KDB: current backend: ddb
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FreeBSD 13.0-CURRENT #23 r357419M: Sun Feb  2 18:27:00 PST 2020
    markmi at FBSDFHUGE:/usr/obj/armv7_clang/arm.armv7/usr/src/arm.armv7/sys/GENERIC-NODBG arm
FreeBSD clang version 9.0.1 (git at github.com:llvm/llvm-project.git c1a0a213378a458fbea1a5c77b315c7dce08fd05) (based on LLVM 9.0.1)
VT: init without driver.
Fatal kernel mode data abort: 'Translation Fault (L1)' on read
trapframe: 0xc0e14cf0
FSR=00000005, FAR=00000150, spsr=000000d3
r0 =00000000, r1 =00000000, r2 =00000001, r3 =c0b55520
r4 =00000150, r5 =00000002, r6 =c510dca0, r7 =c096dc60
r8 =00000001, r9 =c0970fc0, r10=00000000, r11=c0e14da0
r12=00a00010, ssp=c0e14d80, slr=c0631f90, pc =c06313b8

panic: Fatal abort
cpuid = 0
time = 1
KDB: stack backtrace:
db_trace_self() at db_trace_self
         pc = 0xc06789fc  lr = 0xc007f710 (db_trace_self_wrapper+0x30)
         sp = 0xc0e14ac8  fp = 0xc0e14be0
db_trace_self_wrapper() at db_trace_self_wrapper+0x30
         pc = 0xc007f710  lr = 0xc02e6e4c (vpanic+0x174)
         sp = 0xc0e14be8  fp = 0xc0e14c08
         r4 = 0x00000100  r5 = 0xc0b55520
         r6 = 0xc07cb7f7  r7 = 0x00000000
vpanic() at vpanic+0x174
         pc = 0xc02e6e4c  lr = 0xc02e6cd8 (vpanic)
         sp = 0xc0e14c10  fp = 0xc0e14c14
         r4 = 0xc0e14cf0  r5 = 0x00000013
         r6 = 0x00000150  r7 = 0x00000005
         r8 = 0x00000005  r9 = 0xc0b55520
        r10 = 0x00000150
vpanic() at vpanic
         pc = 0xc02e6cd8  lr = 0xc069c5a0 (abort_align)
         sp = 0xc0e14c1c  fp = 0xc0e14c48
         r4 = 0x00000005  r5 = 0x00000005
         r6 = 0xc0b55520  r7 = 0x00000150
         r8 = 0xc0e14c14  r9 = 0xc02e6cd8
        r10 = 0xc0e14c1c
abort_align() at abort_align
         pc = 0xc069c5a0  lr = 0xc069c14c (abort_handler+0x2f8)
         sp = 0xc0e14c50  fp = 0xc0e14ce8
         r4 = 0x00000013  r5 = 0x00000150
abort_handler() at abort_handler+0x2f8
         pc = 0xc069c14c  lr = 0xc067b348 (exception_exit)
         sp = 0xc0e14cf0  fp = 0xc0e14da0
         r4 = 0x00000150  r5 = 0x00000002
         r6 = 0xc510dca0  r7 = 0xc096dc60
         r8 = 0x00000001  r9 = 0xc0970fc0
        r10 = 0x00000000
exception_exit() at exception_exit
         pc = 0xc067b348  lr = 0xc0631f90 (cache_alloc+0x5c4)
         sp = 0xc0e14d80  fp = 0xc0e14da0
         r0 = 0x00000000  r1 = 0x00000000
         r2 = 0x00000001  r3 = 0xc0b55520
         r4 = 0x00000150  r5 = 0x00000002
         r6 = 0xc510dca0  r7 = 0xc096dc60
         r8 = 0x00000001  r9 = 0xc0970fc0
        r10 = 0x00000000 r12 = 0x00a00010
uma_zalloc_arg() at uma_zalloc_arg+0x50
         pc = 0xc06313b8  lr = 0xc0631f90 (cache_alloc+0x5c4)
         sp = 0xc0e14da8  fp = 0xc0e14df0
         r4 = 0xc510dc80  r5 = 0x00000002
         r6 = 0xc510dca0  r7 = 0xc096dc60
         r8 = 0x00000000  r9 = 0xc510dca0
        r10 = 0xffffffff
cache_alloc() at cache_alloc+0x5c4
         pc = 0xc0631f90  lr = 0xc06313dc (uma_zalloc_arg+0x74)
         sp = 0xc0e14df8  fp = 0xc0e14e18
         r4 = 0x00000150  r5 = 0x00000000
         r6 = 0xc510dc80  r7 = 0x000050b0
         r8 = 0x00000002  r9 = 0xc0970fc0
        r10 = 0xc510dc80
uma_zalloc_arg() at uma_zalloc_arg+0x74
         pc = 0xc06313dc  lr = 0xc02c117c (malloc+0x70)
         sp = 0xc0e14e20  fp = 0xc0e14e48
         r4 = 0xc0b554f0  r5 = 0xc0995b6c
         r6 = 0xc510dc80  r7 = 0x000050b0
         r8 = 0xc0945088  r9 = 0x00000002
        r10 = 0x0000000b
malloc() at malloc+0x70
         pc = 0xc02c117c  lr = 0xc02c6dd4 (mtx_pool_setup_dynamic+0x1c)
         sp = 0xc0e14e50  fp = 0xc0e14e60
         r4 = 0xc0b554f0  r5 = 0xc0995b6c
         r6 = 0x00000000  r7 = 0x00800001
         r8 = 0xc0b554fc  r9 = 0x01ac0000
        r10 = 0xc0b55500
mtx_pool_setup_dynamic() at mtx_pool_setup_dynamic+0x1c
         pc = 0xc02c6dd4  lr = 0xc026f490 (mi_startup+0x2a0)
         sp = 0xc0e14e68  fp = 0xc0e14e90
         r4 = 0xc0b554f0  r5 = 0xc0995b6c
         r6 = 0x00000000  r7 = 0x00800001
mi_startup() at mi_startup+0x2a0
         pc = 0xc026f490  lr = 0xc00002c4 (_start+0x144)
         sp = 0xc0e14e98  fp = 0x00000000
         r4 = 0xc00003f8  r5 = 0xc0bb0000
         r6 = 0x00000000  r7 = 0x00c52078
         r8 = 0xc0d83000  r9 = 0x00000000
        r10 = 0x0000000a
_start() at _start+0x144
         pc = 0xc00002c4  lr = 0xc00002c4 (_start+0x144)
         sp = 0xc0e14e98  fp = 0x00000000
KDB: enter: panic
[ thread pid 0 tid 0 ]
Stopped at      kdb_enter+0x58: ldrb    r15, [r15, r15, ror r15]!

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)