[ 0.618502] WARNING: at drivers/misc/kgdbts.c:302 check_and_rewind_pc+0x9a/0xb4()

[Justin Mattock]

I've a macbook and a dell inspiron,(don't see any serial plugins);
but wanted to see if there is any way to use this debugger i.g.
usb, or anything, if not oh well.
when configuring kgdb I just said "y" to all of the options.
When booting, using kgdboc=off (not sure if this is correct or not);
lets me boot into  the system, or else freeze.
under dmesg I see this:

[    0.618288] ------------[ cut here ]------------
[    0.618502] WARNING: at drivers/misc/kgdbts.c:302
check_and_rewind_pc+0x9a/0xb4()
[    0.618845] Modules linked in:
[    0.619000] Pid: 1, comm: swapper Not tainted 2.6.27-rc5-00006-gbef69ea #15
[    0.619321]  [<c0123dd6>] warn_on_slowpath+0x41/0x65
[    0.619568]  [<c0124313>] ? release_console_sem+0x185/0x18d
[    0.619849]  [<c0111f94>] ? kgdb_correct_hw_break+0x13/0xc7
[    0.622511]  [<c03a091b>] ? notifier_call_chain+0x2b/0x4a
[    0.622511]  [<c03a094b>] ? __atomic_notifier_call_chain+0x11/0x13
[    0.622511]  [<c028bd4e>] ? kgdbts_break_test+0x0/0x1e
[    0.622511]  [<c01247b5>] ? printk+0x15/0x17
[    0.622511]  [<c028bd4e>] ? kgdbts_break_test+0x0/0x1e
[    0.622511]  [<c028c882>] check_and_rewind_pc+0x9a/0xb4
[    0.622511]  [<c0150b89>] ? kgdb_breakpoint+0x13/0x24
[    0.622511]  [<c028bd4e>] ? kgdbts_break_test+0x0/0x1e
[    0.622511]  [<c028ba32>] validate_simple_test+0x22/0x69
[    0.622511]  [<c028c0f0>] run_simple_test+0x1a1/0x20e
[    0.622511]  [<c028bacd>] kgdbts_put_char+0x14/0x16
[    0.622511]  [<c01509f2>] put_packet+0x6b/0xbb
[    0.622511]  [<c0151dd0>] kgdb_handle_exception+0xba5/0xc6d
[    0.622511]  [<c01123ad>] kgdb_notify+0x139/0x160
[    0.622511]  [<c03a091b>] notifier_call_chain+0x2b/0x4a
[    0.622511]  [<c03a094b>] __atomic_notifier_call_chain+0x11/0x13
[    0.622511]  [<c03a0959>] atomic_notifier_call_chain+0xc/0xe
[    0.622511]  [<c01371fa>] notify_die+0x2d/0x2f
[    0.622511]  [<c039f45a>] do_int3+0x29/0x67
[    0.622511]  [<c039ee4b>] int3+0x27/0x2c
[    0.622511]  [<c0150b89>] ? kgdb_breakpoint+0x13/0x24
[    0.622511]  [<c028c4d4>] configure_kgdbts+0x1ba/0x404
[    0.622511]  [<c0524413>] init_kgdbts+0x13/0x15
[    0.622511]  [<c0101125>] _stext+0x3d/0x129
[    0.622511]  [<c0524400>] ? init_kgdbts+0x0/0x15
[    0.622511]  [<c0153da6>] ? register_irq_proc+0x9c/0xb5
[    0.622511]  [<c0153de7>] ? init_irq_proc+0x28/0x33
[    0.622511]  [<c050a512>] kernel_init+0xf9/0x147
[    0.622511]  [<c050a419>] ? kernel_init+0x0/0x147
[    0.622511]  [<c0103cbf>] kernel_thread_helper+0x7/0x10
[    0.622511]  =======================
[    0.622511] ---[ end trace 1534190084874a32 ]---
[    0.622511] kgdbts: ERROR PUT: end of test buffer on
'singlestep_breakpoint_test' line 3 expected kgdbts_break_test got
$000000000000000046000000ab00000064ff84f740ff84f7e803000000000000
[    0.622511] ------------[ cut here ]------------
[    0.622511] WARNING: at drivers/misc/kgdbts.c:721
run_simple_test+0x1de/0x20e()
[    0.622511] Modules linked in:
[    0.622511] Pid: 1, comm: swapper Tainted: G        W
2.6.27-rc5-00006-gbef69ea #15
[    0.622511]  [<c0123dd6>] warn_on_slowpath+0x41/0x65
[    0.622511]  [<c0124313>] ? release_console_sem+0x185/0x18d
[    0.622511]  [<c03a094b>] ? __atomic_notifier_call_chain+0x11/0x13
[    0.622511]  [<c028bd4e>] ? kgdbts_break_test+0x0/0x1e
[    0.622511]  [<c01247b5>] ? printk+0x15/0x17
[    0.622511]  [<c01247b5>] ? printk+0x15/0x17
[    0.622511]  [<c028c12d>] run_simple_test+0x1de/0x20e
[    0.622511]  [<c028bacd>] kgdbts_put_char+0x14/0x16
[    0.622511]  [<c01509f2>] put_packet+0x6b/0xbb
[    0.622511]  [<c0151dd0>] kgdb_handle_exception+0xba5/0xc6d
[    0.622511]  [<c01123ad>] kgdb_notify+0x139/0x160
[    0.622511]  [<c03a091b>] notifier_call_chain+0x2b/0x4a
[    0.622511]  [<c03a094b>] __atomic_notifier_call_chain+0x11/0x13
[    0.622511]  [<c03a0959>] atomic_notifier_call_chain+0xc/0xe
[    0.622511]  [<c01371fa>] notify_die+0x2d/0x2f
[    0.622511]  [<c039f45a>] do_int3+0x29/0x67
[    0.622511]  [<c039ee4b>] int3+0x27/0x2c
[    0.622511]  [<c0150b89>] ? kgdb_breakpoint+0x13/0x24
[    0.622511]  [<c028c4d4>] configure_kgdbts+0x1ba/0x404
[    0.622511]  [<c0524413>] init_kgdbts+0x13/0x15
[    0.622511]  [<c0101125>] _stext+0x3d/0x129
[    0.622511]  [<c0524400>] ? init_kgdbts+0x0/0x15
[    0.622511]  [<c0153da6>] ? register_irq_proc+0x9c/0xb5
[    0.622511]  [<c0153de7>] ? init_irq_proc+0x28/0x33
[    0.622511]  [<c050a512>] kernel_init+0xf9/0x147
[    0.622511]  [<c050a419>] ? kernel_init+0x0/0x147
[    0.622511]  [<c0103cbf>] kernel_thread_helper+0x7/0x10
[    0.622511]  =======================
[    0.622511] ---[ end trace 1534190084874a32 ]---

If anybody has any ideas on how
I can use this debugger it would be appreciated.

regards;


-- 
Justin P. Mattock
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