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-# General Information
-
-* [[/hurd/subhurd]]
-
----
-
-# Debugging the Hurd Startup Process
-
-_one.full_ is the subhurd's root file system image and has been installed as
-follows: [TODO]
-
-_Wx_ translates to terminal window _x_.
-
-W1
-
-    $ fsysopts one.full/ --readonly
-    $ sudo boot -I -d -s -D one.full/ one.full/boot/script.boot one.full.ext2
-    Pausing. . .
-
-(In theory it shouldn't be neccessary to run the subhurd as user _root_, but in
-practice [that doesn't work at the
-moment](http://savannah.gnu.org/bugs/?17341).)
-
-W2
-
-    $ ps -Af
-    [...]
-        root   851   385  p4  0:00.01 boot -I -d -s -D one.full/ one.full/boot/script.boot one.full.ext2
-           -   853     1   ?  0:00.00 ?
-           -   854     1   ?  0:00.00 ?
-    [...]
-    $ sudo gdb /var/tmp/one.full/hurd/ext2fs.static
-    [...]
-    (gdb) attach 853
-    Attaching to program `/var/tmp/one.full/hurd/ext2fs.static', pid 853
-    warning: Can't modify tracing state for pid 853: No signal thread
-    Can't fetch registers from thread 1: No such thread
-
-(The _boot_ program [could be modified to print out the
-pids](http://savannah.gnu.org/bugs/?19254), so that one wouldn't have to fumble
-with _ps_.)
-
-W3
-
-    $ sudo gdb /var/tmp/one.full/lib/ld.so.1
-    [...]
-    (gdb) set solib-absolute-prefix /var/tmp/one.full
-    (gdb) attach 854
-    Attaching to program `/var/tmp/one.full/lib/ld.so.1', pid 854
-    warning: Can't modify tracing state for pid 854: No signal thread
-    Can't fetch registers from thread 1: No such thread
-
-W1
-
-    [<Enter>.]
-    /hurd/ext2fs.static --bootflags=-dsf --host-priv-port=38 --device-master-port=43 --exec-server-task=47 -Tdevice pseudo-root
-    /lib/ld.so.1 /hurd/exec
-
-Now that this step has been accomplished, you can set break points in GDB, etc.
-
-W2
-
-    (gdb) continue
-    Continuing.
-    warning: Can't wait for pid 853: No child processes
-
-W1
-
-    Hurd server bootstrap: ext2fs.static[pseudo-root] exec
-
-W3
-
-    (gdb) continue
-    Continuing.
-    warning: Can't wait for pid 854: No child processes
-
-    Program received signal EXC_BAD_ACCESS, Could not access memory.
-    __mach_port_mod_refs (task=1, name=139802, right=1, delta=-1)
-        at /var/tmp/glibc-2_5-branch/build_--without-tls_--without-__thread/mach/RPC_mach_port_mod_refs.c:132
-    132             InP->Head.msgh_reply_port = __mig_get_reply_port();
-    (gdb) x/i $pc
-    0x168f2 <__mach_port_mod_refs+82>:      call   0x151b0 <__mig_get_reply_port>
-
----
-
-Sources:
-
-* [[subhurd/running_a_subhurd]]
-* <http://lists.gnu.org/archive/html/bug-hurd/2007-02/msg00030.html>
-* [[Thomas_Schwinge|tschwinge]]'s mind