On Fri, 18 Oct 2019 12:21:04 +0200 "Hartmann, O." <ohartm...@walstatt.org> wrote:
> On Thu, 17 Oct 2019 21:33:01 +0000 (UTC) > Conrad Meyer <c...@freebsd.org> wrote: > > > Author: cem > > Date: Thu Oct 17 21:33:01 2019 > > New Revision: 353700 > > URL: https://svnweb.freebsd.org/changeset/base/353700 > > > > Log: > > Implement NetGDB(4) > > > > NetGDB(4) is a component of a system using a panic-time network > > stack to remotely debug crashed FreeBSD kernels over the network, > > instead of traditional serial interfaces. > > > > There are three pieces in the complete NetGDB system. > > > > First, a dedicated proxy server must be running to accept > > connections from both NetGDB and gdb(1), and pass bidirectional > > traffic between the two protocols. > > > > Second, the NetGDB client is activated much like ordinary 'gdb' and > > similarly to 'netdump' in ddb(4) after a panic. Like other > > debugnet(4) clients (netdump(4)), the network interface on the route > > to the proxy server must be online and support debugnet(4). > > > > Finally, the remote (k)gdb(1) uses 'target remote <proxy>:<port>' > > (like any other TCP remote) to connect to the proxy server. > > > > The NetGDB v1 protocol speaks the literal GDB remote serial > > protocol, and uses a 1:1 relationship between GDB packets and > > sequences of debugnet packets (fragmented by MTU). There is no > > encryption utilized to keep debugging sessions private, so this is > > only appropriate for local segments or trusted networks. > > > > Submitted by: John Reimer <john.reimer AT emc.com> (earlier > > version) Discussed some with: emaste, markj > > Relnotes: sure > > Differential Revision: https://reviews.freebsd.org/D21568 > > > > Added: > > head/share/man/man4/netgdb.4 (contents, props changed) > > head/sys/gdb/netgdb.c (contents, props changed) > > head/sys/gdb/netgdb.h (contents, props changed) > > Modified: > > head/share/man/man4/Makefile > > head/share/man/man4/ddb.4 > > head/sys/amd64/conf/GENERIC > > head/sys/conf/NOTES > > head/sys/conf/files > > head/sys/conf/options > > head/sys/gdb/gdb.h > > head/sys/gdb/gdb_int.h > > head/sys/gdb/gdb_main.c > > head/sys/gdb/gdb_packet.c > > head/sys/i386/conf/GENERIC > > head/sys/kern/subr_kdb.c > > head/sys/net/debugnet.c > > head/sys/net/debugnet.h > > head/sys/net/debugnet_inet.c > > head/sys/net/debugnet_int.h > > head/sys/sys/kdb.h > > head/sys/sys/param.h > > > > Modified: head/share/man/man4/Makefile > > ============================================================================== > > --- head/share/man/man4/Makefile Thu Oct 17 21:25:50 > > 2019 (r353699) +++ head/share/man/man4/Makefile Thu Oct > > 17 21:33:01 2019 (r353700) @@ -307,6 +307,7 @@ MAN= > > aac.4 \ net80211.4 \ > > netdump.4 \ > > netfpga10g_nf10bmac.4 \ > > + netgdb.4 \ > > netgraph.4 \ > > netintro.4 \ > > netmap.4 \ > > > [...] > > > Having "nooptions NETGDB # netgdb(4) client support" > defined in my kernel config file, buildkernel fails with the error > shown below. > > [...] > --- debugnet.o --- > /usr/src/sys/net/debugnet.c:662:4: error: implicit declaration of > function 'db_printf' is invalid in C99 > [-Werror,-Wimplicit-function-declaration] db_printf("%s: Could not get > route for that server.\n", ^ /usr/src/sys/net/debugnet.c:662:4: note: > did you mean 'if_printf'? /usr/src/sys/net/if_var.h:679:5: note: > 'if_printf' declared here int if_printf(struct ifnet *, const char > *, ...) __printflike(2, 3); ^ > 1 error generated. And I also had to add "nooptions NETDUMP" to get the kernel to compile and link. -- Gary Jennejohn _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
