Nostop noprint



Keywords: nostop noprint
Description: Debugging UML in skas mode is pretty much the same as debugging a normal process, since, in skas mode, UML is pretty normal. You don't need the 'debug' switch on the command line, and you don't get

Debugging UML in skas mode is pretty much the same as debugging a normal process, since, in skas mode, UML is pretty normal. You don't need the 'debug' switch on the command line, and you don't get gdb popping up in a new xterm. You start by running gdb on the UML binary and starting it running host% gdb linux (host gdb) r ubd0=/home/jdike/roots/cow.debian,/home/jdike/roots/debian_22 con=port:9000 ssl=pty con0=fd:0,fd:1 umid=debian mem=128M Also, have gdb ignore SIGSEGV and SUGUSR1 since these are used internally by UML, and your debugging session would otherwise be continually interrupted by them (host gdb) handle SIGSEGV pass nostop noprint (host gdb) handle SIGUSR1 pass nostop noprint

If you've enabled both CONFIG_MODE_TT and CONFIG_MODE_SKAS, UML will exec itself, and gdb will see a SIGTRAP. Just continue it if this happens. If CONFIG_MODE_TT is disabled, then UML will simply boot up.

If you set any breakpoints before running UML, then all you need to do is get UML to hit one of them, and you will be bounced back to the gdb prompt for debugging. When you continue UML, you will be back to whatever UML prompt you had.

If you need to interrupt UML, you can't ^C it because the terminal is in raw mode, and the ^C will just hit whatever UML is running. What you need to do is send the UML kernel thread a SIGINT from another shell. It is normally the first process after the gdb The '[linux]' process is the userspace process, and the kernel process is the one immediately before it. host% kill -INT 7133






Photogallery Nostop noprint:


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