[User-mode-linux-devel] Some more checkins

[Jeff D. <jd...@ka...>]

I decided to go on a breakpoint-fixing binge.

First, I went after the kernel debugger breakpoint problem.  That turned out 
to be because do_syscall was accidentally storing the process state in the 
thread structure when it shouldn't.  With that fixed, the kernel debugger now 
seems to work OK, except that I still can't step across a context switch.  But 
everything else seems to work fine.

Then, I looked at why gdb panics the kernel whenever a debuggee hits a 
breakpoint.  That turned out to be because SIGTRAP wasn't delivered to the 
debuggee when it hit the breakpoint, PTRACE_SINGLESTEP wasn't implemented, 
which upset gdb, and one or two smaller things.  With those fixed, gdb seems 
to run ok in a virtual machine.

There is a somewhat more complete description of what I did on my diary page: 
http://user-mode-linux.sourceforge.net/diary.html

An even more complete description is available from CVS and from the patch 
manager.

				Jeff