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| author | dwhite <dwhite@FreeBSD.org> | 2005-04-30 20:01:00 +0000 |
|---|---|---|
| committer | dwhite <dwhite@FreeBSD.org> | 2005-04-30 20:01:00 +0000 |
| commit | c8fa8099674d921d50dae72e3a58ef66ac9c7fbc (patch) | |
| tree | b1d1d16a2806520655c3bf213640cc3b5593de38 /sys/conf/options.i386 | |
| parent | ebe4b8304d164a842cc96bcc863c9321a37f57ff (diff) | |
| download | FreeBSD-src-c8fa8099674d921d50dae72e3a58ef66ac9c7fbc.zip FreeBSD-src-c8fa8099674d921d50dae72e3a58ef66ac9c7fbc.tar.gz | |
Implement an alternate method to stop CPUs when entering DDB. Normally we use
a regular IPI vector, but this vector is blocked when interrupts are disabled.
With "options KDB_STOP_NMI" and debug.kdb.stop_cpus_with_nmi set, KDB will
send an NMI to each CPU instead. The code also has a context-stuffing
feature which helps ddb extract the state of processes running on the
stopped CPUs.
KDB_STOP_NMI is only useful with SMP and complains if SMP is not defined.
This feature only applies to i386 and amd64 at the moment, but could be
used on other architectures with the appropriate MD bits.
Submitted by: ups
Diffstat (limited to 'sys/conf/options.i386')
| -rw-r--r-- | sys/conf/options.i386 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/conf/options.i386 b/sys/conf/options.i386 index a1dfee6..405614f 100644 --- a/sys/conf/options.i386 +++ b/sys/conf/options.i386 @@ -160,3 +160,6 @@ IPR_LOG opt_i4b.h DEV_APIC opt_apic.h DEV_NPX opt_npx.h ASR_COMPAT opt_asr.h + +# Debugging +KDB_STOP_NMI opt_global.h |
