ok, i think i can explain the "unlock of ilock: pc f0140fc5, held by ..."
message.
i extracted that 9pcflop kernel with muzgos cdfpart from the current iso and
disassembled with acid arround.
the routine that calls unlock looks like this:
the routine that calls the unlock (shutdown from ether79c970.c)
0xf0140f79 0xf0140f79 SUBL $0x14,SP
0xf0140f7c 0xf0140f7c MOVL 0x18(SP),AX
# ctlr = arg->foobar
0xf0140f80 0xf0140f80 MOVL 0x78(AX),CX
0xf0140f83 0xf0140f83 MOVL CX,0x10(SP)
0xf0140f87 0xf0140f87 MOVL CX,0x0(SP)
# ilock(ctlr)
0xf0140f8a 0xf0140f8a CALL 0xf019af31
0xf0140f8f 0xf0140f8f MOVL 0x10(SP),AX
0xf0140f93 0xf0140f93 MOVL AX,0x0(SP)
0xf0140f96 0xf0140f96 MOVL $0x18,AX
0xf0140f9b 0xf0140f9b MOVL AX,0x4(SP)
# io32r(ctlr, 0x18) ???
0xf0140f9f 0xf0140f9f CALL 0xf01409b4
0xf0140fa4 0xf0140fa4 MOVL 0x10(SP),AX
0xf0140fa8 0xf0140fa8 MOVL AX,0x0(SP)
0xf0140fab 0xf0140fab MOVL $0x18,AX
0xf0140fb0 0xf0140fb0 MOVL AX,0x4(SP)
# io16r(ctlr, 0x18);
0xf0140fb4 0xf0140fb4 CALL 0xf014093f
0xf0140fb9 0xf0140fb9 MOVL 0x10(SP),AX
0xf0140fbd 0xf0140fbd MOVL AX,0x0(SP)
# unlock(ctlr)
0xf0140fc0 0xf0140fc0 CALL 0xf019b0be
0xf0140fc5 0xf0140fc5 ADDL $0x14,SP
0xf0140fc8 0xf0140fc8 RET
it have no debug symbols so i looked for magic numbers
arround (in this case 0x18)
wich turned out to be:
ether79c970.c:31: Sreset = 0x0018, /* software reset */
# this looks like io32r() from ether79c970.c
acid: asm(0xf01409b4)
0xf01409b4 0xf01409b4 SUBL $0x8,SP
0xf01409b7 0xf01409b7 MOVL 0xc(SP),CX
# port = arg2
0xf01409bb 0xf01409bb MOVL 0x1c(CX),CX
# port += arg1
0xf01409be 0xf01409be ADDL 0x10(SP),CX
0xf01409c2 0xf01409c2 MOVL CX,0x0(SP)
# inl(port)
0xf01409c5 0xf01409c5 CALL 0xf010036e
0xf01409ca 0xf01409ca ADDL $0x8,SP
0xf01409cd 0xf01409cd RET
# this is inl()
acid: asm(0xf010036e)
0xf010036e 0xf010036e MOVL 0x4(SP),DX
0xf0100372 0xf0100372 INL DX,AX
0xf0100373 0xf0100373 RET
so there is your bug!
static void
shutdown(Ether *ether)
{
Ctlr *ctlr;
ctlr = ether->ctlr;
ilock(ctlr);
io32r(ctlr, Sreset);
io16r(ctlr, Sreset);
unlock(ctlr);
}
it was commented out before...
the file just changed... i think they try to fix it right now...
--
cinap
