Date: Sat, 28 Mar 2015 11:11:52 -0600 From: Warner Losh <imp@bsdimp.com> To: =?utf-8?Q?Manuel_St=C3=BChn?= <freebsdnewbie@freenet.de> Cc: freebsd-arm@freebsd.org, ticso@cicely.de Subject: Re: remote kernel debugging Message-ID: <AB5F8E72-7972-48B4-B07A-11AAF0B0BFF3@bsdimp.com> In-Reply-To: <5516D944.80602@freenet.de> References: <550DD740.2070608@freenet.de> <20150322011054.GA81780@cicely7.cicely.de> <5516D944.80602@freenet.de>
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[-- Attachment #1 --] > On Mar 28, 2015, at 10:39 AM, Manuel Stühn <freebsdnewbie@freenet.de> wrote: > > On Sun, 22 Mar 2015 02:10:54 +0100, Bernd Walter wrote >> The flags are documented in the uart manpage. >> 0x10 flag sets the console uart and 0x80 the gdb uart. >> 0x90 sets both. >> But it assumes /boot/device.hints to be used, which to my knowledge isn't >> true on the BBB. >> The console is setup via stdin/stdout in >> sys/boot/fdt/dts/arm/beaglebone.dts >> No idea how gdb or any of the other flags can be entered in the DTS files. >> > > After further investigation I found this flag for loader(8): > > set hw.uart.dbgport="mm:0x48022000,br:115200" # uart1 on BBB > > (more info in sys/dev/uart/uart_subr.c), which seems to be able to inform the debug-system about the desired uart-port. Unfortunately, when I'm setting this variable like shown above the systems stops right here: > > Hit [Enter] to boot immediately, or any other key for command prompt. > Booting [/boot/kernel/kernel]... > Using DTB provided by U-Boot at address 0x80000100. > Kernel entry at 0x80200100... > Kernel args: (null) > GDB: debug ports: uart > > No further output appears, it seems that the whole system stopped at this point. > > Any hints? Do you have DDB, KDB and GDB all enabled in the kernel? Warner [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJVFuDZAAoJEGwc0Sh9sBEAzLQP/j3yOtJE7lqoxktX3fY1Dlm4 L1boPxkujgja/cz9qZZD5WZriU6TfnYx0Q9VMSo1fd0rkGjh3JVksp3so6QJX1rb Moq1xqOPcmYTU9gvQh6ZNI4ZGJcI1YsaUOsj0Y3ive+I9LTRRolkrWlKvtk4RqEl sM2ApFip5bbLa7u9Zp1T92SdvGc6IEuzGaHBFeXwdNigaq0ILwUSYOOPJi7lIpQI 625FCD33pwFdo+RKV/3LvZSD+wGDhsq9t7+ihwXCOkjgTeuPPwzzR8Xm55MGvPX4 Uf9HQtQ8Yf6NGjCZGL7WJ6gDFtoo36qWVfJ2OYYhrIifdCvR98s7ag2Ol8xmgJie fvmZ1Fo2dfxNNlcMVCzWbNDQXDmOFzZxX6hT22GCIJCAEJfa6Ut2ksPdsT8YzZn2 c/MBnGQ2pLK8x15l9/WP0GHYyHumSbHvAc/Nmlc/3Z5le47W7qffO0B/GdVGHLQr USSbJH1ovWReCllfTr5Os9Bh0bBkXLr5z44CL65GR36+komW5rJTMmc8m/hZvi6B ulgFermtjDU344Zp/EB4HAc2v8CZfg1OQiTtk1Y+84LjIZvfLLPJks7GVQHIKY5t 5gQcrRy/UrwZR5C67ldMjo9bzihtLH0rnElemZHl6+vmDDfOhhatnDqwHlsQWz6T nGgc9d5F+szTbNEaYj9+ =G0aB -----END PGP SIGNATURE-----help
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