Date: Thu, 31 Aug 2006 11:37:06 -0700 From: "David Christensen" <davidch@broadcom.com> To: "Stefan Bethke" <stb@lassitu.de> Cc: freebsd-current@freebsd.org Subject: RE: Simplified Steps for Building a Loadable module on -CURRENT Message-ID: <09BFF2FA5EAB4A45B6655E151BBDD90301E2F47E@NT-IRVA-0750.brcm.ad.broadcom.com> In-Reply-To: <1F8279E4-7F1C-4597-8BCC-B5E2A055E6F2@lassitu.de>
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=20
> -----Original Message-----
> From: Stefan Bethke [mailto:stb@lassitu.de]=20
> Sent: Thursday, August 31, 2006 12:20 AM
> To: David Christensen
> Cc: freebsd-current@freebsd.org
> Subject: Re: Simplified Steps for Building a Loadable module=20
> on -CURRENT
>=20
> Am 31.08.2006 um 01:36 schrieb David Christensen:
>=20
> >> Then what's the panic message, and how exactly are you=20
> building your
> >> module?
> >>
> >
> > The message wasn't readable on the serial console. The text was =20
> > jumbled
> > and I could only make out bits and pieces of it.
>=20
> And the module that got installed in /boot/kernel/<module>.ko does =20
> exhibit the same problem, or not?
> > So I should do the following:
> >
> > 1) Comment out the driver I want to test in the kernel configuration
> > file.
> > For example, modify /usr/src/sys/amd64/conf/MYCONFIG.
> > 2) Rebuild and install the kernel (cd /usr/src; make kernel
> > KERNCONF=3DMYCONFIG)
>=20
> Which also builds and installs all modules into /boot/kernel=20
> (see src/=20
> sys/modulesMakefile for the list of modules that are built).
>=20
> > 3) Reboot the system to start using the new kernel
> > 4) Edit the driver in /usr/src/sys/dev/XXX as necessary
> > 5) Build the kernel module (cd /usr/src/sys/modules/XXX; make)
> > 6) Load the kernel module (kldload ./if_XXX) and cross my fingers.
>=20
> No, make that:
>=20
> 6) Enable the kernel debugger, load the module, then show the list =20
> the panic message, backtrace, etc. and tell us which driver you're =20
> talking about and how you modified it.
1) The driver is /usr/src/sys/dev/bge.
2) My Makefile:
.PATH: .
KMOD=3D if_bge
SRCS=3D bus_if.h device_if.h pci_if.h miibus_if.h miidevs.h
SRCS+=3D if_bge.c if_bgereg.h=20
DEBUG_FLAGS =3D -g
.include <bsd.kmod.mk>
3) The source is unmodified from -CURRENT
4) Here's the panic (though it's a little hard to read):
Loading if_bge.ko
bge0: <Broadcom BCM5752 A1, ASIC rev. 0x6001> mem 0xdd100000-0xdd10ffff
irq 16 at device 0.0 on pci1
F
aaFt
lF attraaapt l3a0 :l rtersaeprtv e3d0 r(au:n kpnroewsne) rfva3u0l:t
rwehdielwes ei(nu rknevrknneelo dm o(duen
wkcnpnu)iodw =3Df n3); aafpuilca uildt =3Dt w0 7h
fiihnlsiter uicltni oen ipkonienrtneer l=3D m0kxe8o:d0rxefnfef
fcfpfufl8i0 6m2o1dbe3d6
fs=3Dt accpku 1p;o iindt ear=3D p 0 ; i a p i=3Dc c0 xi1 0d: =
0=3Dx
f0fif0fdf f
rf=3Da ci2n0s50btd10
furcaimnet ipsotionrtuecrt n p o i i n t o=3Dn e0rx 1=3D0 =
:
00xxfpfof88ifnf:f0ftaecr2 0=3D5 b0ex0x
lfi8m0dfef fsfefgfmfe8nxt0 f 4=3D2 0bfafsfe9 60fxf0f,f=20
t i0t6 20sx1fbf3ftfafc,6=20
pyspket a0 xc1kb=20
p o i o=3Di nDtPnLe r0 , p r e s t1e,r l o n g
1 ,=3D d0 xf 312 00:, 0gxrfafnf f1f
=3D: 0ixnftxe1sfs0ofra ce2f0lfabgds0
r efrfrfufprta femneafbfl epdf,a oIciOnP2Lt 2=3D8 b0e
r3c0u r
e n tf rp r oac emses =3D=3D 100x (pi1dolien:t
0c:p0ue3r)
[thread pid 10 tid 100003 ]
Stopped at acpi_cpu_c1+0x6: leave =20
db> bt
Tracing pid 10 tid 100003 td 0xffffff017f61f560
acpi_cpu_c1() at acpi_cpu_c1+0x6
acpi_cpu_idle() at acpi_cpu_idle+0x180
cpu_idle() at cpu_idle+0x29
idle_proc() at idle_proc+0x85
fork_exit() at fork_exit+0xcf
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip =3D 0, rsp =3D 0xffffffffac205d40, rbp =3D 0 ---
db>=20
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