63 lines
1.3 KiB
Plaintext
63 lines
1.3 KiB
Plaintext
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.TH KTRACE 1
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.SH NAME
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ktrace \- interpret kernel stack dumps
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.SH SYNOPSIS
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.B ktrace
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[
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.B -i
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]
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.I kernel
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.I pc
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.I sp
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[
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.I link
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]
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.SH DESCRIPTION
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.I Ktrace
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translates a hexadecimal kernel stack dump
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into a sequence of
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.IR acid (1)
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commands to show the points in the call trace.
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The
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.I kernel
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argument should be the path of the kernel being debugged,
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and
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.I pc
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and
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.I sp
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are the PC and SP values given in the stack dump.
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For MIPS kernels, the contents of the
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.I link
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register must also be supplied.
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.PP
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A stack trace consists of a
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.I ktrace
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command followed by a series of lines containing
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fields of the form
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.IB location = contents \fR:
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.EX
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ktrace /kernel/path 80105bc1 8048e174
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8048e114=80105ac6 8048e120=80140bb4 8048e134=8010031c
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8048e16c=80137e45 8048e170=80105bc1 8048e178=80137e62
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\&...
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.EE
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.PP
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The trace can be edited to provide the correct kernel path
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and then pasted into a shell window.
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If the
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.B -i
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option is present,
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.I ktrace
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instead prompts for the contents of the memory locations in which it is interested;
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this is useful when the stack trace is on a screen rather than
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in a machine readable form.
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.SH SOURCE
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.B /sys/src/cmd/ktrace.c
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.SH SEE ALSO
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.IR acid (1),
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.IR rdbfs (4)
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.SH BUGS
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When examining a kernel trace resulting from
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an interrupt on top of other interrupts,
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only the topmost call trace is printed.
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