[Kgdb-bugreport] ctrl+c and echo -e "\003" > /dev/ttySX do not work?

[Arkadiusz M. <ar...@pl...>]

Hi,

The problem is that if I run kgdb-2 patched linux 2.6.6 kernel, attach gdb =
to=20
it, quit from gdb (so kernel continutes booting) and then trying to attach=
=20
again by doing

echo -e "\003" > /dev/ttySX
gdb; target remote /dev/ttySX then it says

Ignoring packet error, continuing...
Couldn't establish connection to remote target

Also if I won't exit from gdb then it boots until:
Limiting direct PCI/PCI transfers.
Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
ttyS0 at I/O 0x3f8 (irq =3D 4) is a 16550A
ne2k-pci.c:v1.03 9/22/2003 D. Becker/P. Gortmaker

and stops here.

When I run and quit gdb at ,,Waiting for connection from remote gdb...''
 then it boots fine:

Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled
ttyS0 at I/O 0x3f8 (irq =3D 4) is a 16550A
ne2k-pci.c:v1.03 9/22/2003 D. Becker/P. Gortmaker
  http://www.scyld.com/network/ne2k-pci.html
PCI: Found IRQ 10 for device 0000:00:0a.0
eth0: RealTek RTL-8029 found at 0xb400, IRQ 10, 00:C0:DF:E8:BF:1A.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=3D=
xx
PIIX4: IDE controller at PCI slot 0000:00:04.1
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xd800-0xd807, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xd808-0xd80f, BIOS settings: hdc:DMA, hdd:pio
hda: Maxtor 90650U2, ATA DISK drive
Using anticipatory io scheduler
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hdc: CRD-8400B, ATAPI CD/DVD-ROM drive
ide1 at 0x170-0x177,0x376 on irq 15
hda: max request size: 128KiB
hda: 12594960 sectors (6448 MB) w/2048KiB Cache, CHS=3D13328/15/63
 hda: hda1 hda2 hda3
hdc: ATAPI 40X CD-ROM drive, 128kB Cache

but of course I can't reaatach to it.

This would not be big problem if ctrl+c or echo -e "\003" were working :/

kernel has all kernel debugging stuff enabled
# CONFIG_DEBUG_DRIVER is not set
CONFIG_DEBUG_KERNEL=3Dy
CONFIG_DEBUG_STACKOVERFLOW=3Dy
CONFIG_DEBUG_STACK_USAGE=3Dy
CONFIG_DEBUG_SLAB=3Dy
CONFIG_DEBUG_SPINLOCK=3Dy
CONFIG_DEBUG_PAGEALLOC=3Dy
CONFIG_DEBUG_INFO=3Dy
CONFIG_DEBUG_SPINLOCK_SLEEP=3Dy

=2D-=20
Arkadiusz Mi=B6kiewicz     CS at FoE, Wroclaw University of Technology
arekm.pld-linux.org, 1024/3DB19BBD, JID: arekm.jabber.org, PLD/Linux