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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.amd64 | |
| 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.amd64')
| -rw-r--r-- | sys/conf/options.amd64 | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/conf/options.amd64 b/sys/conf/options.amd64 index 82f864d..0227bfd 100644 --- a/sys/conf/options.amd64 +++ b/sys/conf/options.amd64 @@ -55,3 +55,6 @@ PSM_HOOKRESUME opt_psm.h PSM_RESETAFTERSUSPEND opt_psm.h PSM_DEBUG opt_psm.h DEV_ATPIC opt_atpic.h + +# Debugging +KDB_STOP_NMI opt_global.h |
