ddb problems

[Michiel Boland]

Hi. I can't seem to get anything useful out of ddb with recent -CURRENTs. 
I get things like double faults, page faults, or endless streams of 
console messages. Is anyone else seeing this?

Cheers
Michiel

KDB: enter: Line break on console
[thread 100004]
Stopped at      kdb_enter+0x2b: nop
db> break flock
db> c
[thread 100073]
Stopped at      flock+0x1:      movl    %esp,%ebp
db> tr
flock(2f,2f,2f,80c80f6,2) at flock+0x1
Xint0x80_syscall() at Xint0x80_syscall+0x1f
--- syscall (131, FreeBSD ELF32, flock), eip = 0x28282c37, esp = 0xbfbfc03c, ebp = 0xbfbfc068 ---
db> show r
cs                 0x8
ds                0x10
es                0x10
fs                0x18
ss                0x10
eax         0xd99acd14
ecx                  0
edx         0xc0622cb8  sysent+0x418
ebx         0xc19c71c0
esp         0xd99accf0
ebp         0xd99acd40
esi                  0
edi         0xc17c29a0
eip         0xc04954cd  flock+0x1
efl              0x246
dr0                  0
dr1                  0
dr2                  0
dr3                  0
dr4         0xffff0ff0
dr5              0x400
dr6         0xffff0ff0
dr7              0x400
flock+0x1:      movl    %esp,%ebp
db> s
[thread 100073]
Stopped at      flock+0x3:      pushl   %edi
db> 
[thread 100073]
Stopped at      flock+0x4:      pushl   %esi
db> 
[thread 100073]
Stopped at      flock+0x5:      pushl   %ebx
db> 
[thread 100073]
Stopped at      flock+0x6:      subl    $0x44,%esp
db> 
[thread 100073]
Stopped at      flock+0x9:      movl    0xc(%ebp),%esi
db> 
[thread 100073]
Stopped at      flock+0xc:      leal    0xffffffb0(%ebp),%eax
db> 
[thread 100073]
Stopped at      flock+0xf:      pushl   %eax
db> 
[thread 100073]
Stopped at      flock+0x10:     pushl   0(%esi)
db>


Fatal trap 12: page fault while in kernel mode
fault virtual address	= 0x2
fault code		= supervisor read, page not present
instruction pointer	= 0x8:0xc04954dc
stack pointer	        = 0x10:0xd99acc9c
frame pointer	        = 0x10:0xd99accf0
code segment		= base 0x0, limit 0xfffff, type 0x1b
 			= DPL 0, pres 1, def32 1, gran 1
processor eflags	= trace trap, interrupt enabled, resume, IOPL = 0
current process		= 659 (sendmail)
[thread 100073]
Stopped at      flock+0x10:     pushl   0(%esi)
db> show r
cs                 0x8
ds          0xc0630010  ip_doopts+0x4
es          0xc05c0010  bios16+0x1fc
fs                0x18
ss                0x10
eax         0xd99acca0
ecx                  0
edx         0xc0622cb8  sysent+0x418
ebx         0xc19c71c0
esp         0xd99acc9c
ebp         0xd99accf0
esi                0x2
edi         0xc17c29a0
eip         0xc04954dc  flock+0x10
efl            0x10286
dr0                  0
dr1                  0
dr2                  0
dr3                  0
dr4         0xffff4ff0
dr5              0x400
dr6         0xffff4ff0
dr7              0x400
flock+0x10:     pushl   0(%esi)