PCI range checking under qemu-system-sparc64

[Mark Cave-Ayland]

On 17/11/15 23:12, Adrian Chadd wrote:

> cool, thanks!
> 
> can you do "show registers" and "bt" there? Do we know what's going on?

WARNING: WITNESS option enabled, expect reduced performance.
Trying to mount root from cd9660:/dev/iso9660/TEST [ro]...
[ thread pid 1 tid 100002 ]
Stopped at      tl1_trap+0x24:  stx             %o0, [%sp + 0x997]
db> show registers
g0          0xfffff800015e84d0
g1                  0xc0c8ab38
g2                  0xc0c8a800
g3                         0x1
g4          0xfffff800015efb80
g5                    0x2d7400
g6                  0xc3a6d980
g7                  0xc0f791d0  pcpu0+0x1800
i0                        0x11  pcpup+0xa
i1                         0x1
i2                           0
i3                           0
i4                           0
i5                           0
i6                           0
i7                    0x101264
tnpc                0xc00b0fe8  tl1_trap+0x28
tpc                 0xc00b0fe4  tl1_trap+0x24
tstate            0x9958001507
tl1_trap+0x24:  stx             %o0, [%sp + 0x997]
db> bt
Tracing pid 1 tid 100002 td 0xfffff800015e84d0
KDB: reentering
KDB: stack backtrace:
kdb_reenter() at kdb_reenter+0x5c
trap() at trap+0x2fc
-- kernel stack fault %o7=0xc05743e0 --
sched_clock() at sched_clock+0x94
KDB: reentering
KDB: stack backtrace:
kdb_reenter() at kdb_reenter+0x5c
trap() at trap+0x2fc
-- kernel stack fault %o7=0xc011a050 --
db_read_bytes() at db_read_bytes+0x44
KDB: reentering
KDB: stack backtrace:
kdb_reenter() at kdb_reenter+0x5c
trap() at trap+0x2fc
-- kernel stack fault %o7=0xc011a050 --
db_read_bytes() at db_read_bytes+0x44
KDB: reentering
KDB: stack backtrace:
kdb_reenter() at kdb_reenter+0x5c
trap() at trap+0x2fc
-- kernel stack fault %o7=0xc011a050 --
db_read_bytes() at db_read_bytes+0x44
KDB: reentering
KDB: stack backtrace:
kdb_reenter() at kdb_reenter+0x5c
trap() at trap+0x2fc
-- kernel stack fault %o7=0xc011a050 --
panic: longjmp botch
cpuid = -1012475520
KDB: stack backtrace:
Uptime: 22s
Automatic reboot in 15 seconds - press a key on the console to abort
--> Press a key on the console to reboot,
--> or switch off the system now.


Definitely looks like the stack is corrupted here.


ATB,

Mark.