Author: imp Date: Sat Jan 16 01:13:27 2016 New Revision: 294121 URL: https://svnweb.freebsd.org/changeset/base/294121
Log: Add some clarifications. Modified: head/share/man/man4/ddb.4 Modified: head/share/man/man4/ddb.4 ============================================================================== --- head/share/man/man4/ddb.4 Sat Jan 16 01:03:39 2016 (r294120) +++ head/share/man/man4/ddb.4 Sat Jan 16 01:13:27 2016 (r294121) @@ -1437,15 +1437,18 @@ Other bus' bridge chipsets may be able t methods. There are many PCI and PCIe add-in cards which can generate NMI for debugging. -Modern systems typically use IPMI to generate signals to enter the +Modern server systems typically use IPMI to generate signals to enter the debugger. The .Dv devel/ipmitool port can be used to send the .Cd chassis power diag command which delivers an NMI to the processor. +Embedded systems often use JTAG for debugging, but rarely use it in +combination with +.Nm . .Pp -For serial consoles, you can break to the debugger by sending a BREAK +For serial consoles, you can enter the debugger by sending a BREAK condition on the serial line if .Cd options BREAK_TO_DEBUGGER is specified in the kernel. @@ -1464,11 +1467,13 @@ TILDE is the ASCII tilde character (~). CTRL-x is Control x created by hitting the control key and then x and then releasing both. .Pp -The break to debugger behavior may also be enabled by setting the +The break to enter the debugger behavior may be enabled at trim-time +by setting the .Xr sysctl 8 .Dv debug.kdb.break_to_debugger to 1. -The alt break to debugger behavior may also be enabled by setting the +The alternate sequence to enter the debugger behavior may be enabled +at run-time by setting the .Xr sysctl 8 .Dv debug.kdb.alt_break_to_debugger to 1. _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
