illumos gate

One early boot:

panic[cpu7]/thread=2a101715c60: BAD TRAP: type=34 rp=2a101715360 addr=7011db79 mmu_fsr=0

sched: alignment error:
addr=0x7011db79
pid=0, pc=0x7b7620b4, sp=0x2a101714c01, tstate=0x4480001605, context=0x0
g1-g7: 7011d800, 0, ffffff, 300092e01e0, 0, 1c, 2a101715c60

Warning - stack not written to the dumpbuf
000002a1017150c0 unix:die+a4 (34, 2a101715360, 7011db79, 0, 3000016a008, ffffffffffffffff)
  %l0-3: 0000000000000000 0000000000003000 00000300001741e0 0000030000174208
  %l4-7: 0000000000000000 0000000000000000 000000000000ffff 00000000007c3ff8
000002a1017151a0 unix:trap+1884 (2a101715360, 0, e00000034, e, 0, 1949338)
  %l0-3: 0000000000000008 0000000000000001 0000000000000000 00000000018a54c0
  %l4-7: 0000000000000000 000006002b538f38 0000000000000000 000002a1011f5840
000002a1017152b0 unix:ktl0+64 (1a18e18, 0, 2, 0, 70069cf8, 0)
  %l0-3: 0000030009692000 0000000000000038 0000004480001605 000000000101eb20
  %l4-7: 000000000180c000 0000000000000000 0000000000000000 000002a101715360
000002a101715400 stmf_sbd:_init+a8 (0, 7b762000, 193f180, 0, 7011d800, 7011d800)
  %l0-3: 0000000000000002 0000000000000000 0000000000000002 0000000000000063
  %l4-7: 000006002c3ffb10 0000000000000000 0000000000000000 0000000000000000
000002a1017154b0 genunix:modinstall+90 (6002b7fea48, 1, 12fb3dd, 12fb400, 198d400, 7b762000)
  %l0-3: 00000000012fb3de 000002a101715518 0000000000000000 0000000000000000
  %l4-7: 0000000001080d00 0000000000000020 0000000000000000 00000300034e5b61
000002a101715570 genunix:mod_hold_installed_mod+64 (6002b7fea48, 1, 0, 2a1017156dc, 30000120008, 0)
  %l0-3: ffffffffffffffff 0000000000000000 000000000000003c 000002a1019e1c60
  %l4-7: 00000000003c0000 000006002b429980 0000000000000000 000002a1019e1840
000002a101715620 genunix:modrload+124 (12fb878, 300034e5b58, 0, d, 0, 6002bdb5840)
  %l0-3: 0000000000000001 0000000000000000 000002a10171583c 00000300085dc208
  %l4-7: 00000000ffffe800 000000000000000b 0000000000000000 000002a101715640
000002a1017156e0 genunix:modload+c (12fb878, 300034e5b58, 3, 1f01, 129fb80, 7620)
  %l0-3: 0000030004a81c48 0000030004a81500 0000000000001f01 0000000000000001
  %l4-7: 0000030004a814e0 0000000000000000 0000000000000000 0000000000000001
000002a101715790 genunix:mod_hold_dev_by_major+a4 (10e, 12fb878, 19478e0, 193937
0, 199d000, 7620)
  %l0-3: 00000300034ca870 0000000000000870 00000300034ca000 ffffffffffffffff
  %l4-7: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
000002a101715840 genunix:ddi_hold_driver+4 (10e, 2a101715c60, 129fb80, 300035dba
38, ffffffffffffffff, 300035dba38)
  %l0-3: 0000000001999800 0000000000000001 000000000183e800 000000000000003c
  %l4-7: 0000000000630000 0000000000000000 0000000000000000 0000000000000000
000002a1017158f0 genunix:ddi_hold_installed_driver+8 (10e, 1991400, 6002b0ec400, 300035dba38, 10e, 300035dba20)
  %l0-3: 0000000000000000 000000000000003c 0000000000000000 0000000000000000
  %l4-7: 000000000180c000 0000000000000000 000000000000ffff 0000000000000000
000002a1017159a0 genunix:attach_drivers+5c (0, 10e, 199d038, 1991408, 7690, 10e)
  %l0-3: 000006002b533310 0000000000000000 000000000000ffff 000002a1017b5c60
  %l4-7: 00000000ffff0000 0000000000000000 0000000000000000 0000000000000000

skipping system dump - no dump device configured

As it did turn out, 11820 did add check for 3 global variables in _init, all declared as extern int, while in fact, the storage allocated was uint8_t.

Tested on both sparc and x86.