Dne Čt 7. června 2012 14:07:59 Petr Tesarik napsal(a):
> Dne Čt 7. června 2012 03:58:16 qiaonuohan napsal(a):
> > At 2012-6-6 21:44, Petr Tesarik wrote:
> > > crash> list task_struct.tasks -s task_struct.tasks -h 0xeede04f0+432
> > > eede04f0
> > >
> > > tasks = {
> > >
> > > next = 0xd79d6f20,
> > > prev = 0xd55e6220
> > >
> > > }
> > >
> > > d79d6d70
> > >
> > > tasks = {
> > >
> > > next = 0xc32c5320,
> > > prev = 0xeede06a0
> > >
> > > }
> > >
> > > ...
> > >
> > > Note that the first element in the list (the one which contains the
> > > starting list_head) is included.
> > >
> > > Based on the above, I'm afraid don't quite get the intended goal of
> > > your patch.
> >
> > Hello Petr and Dave,
> >
> > I misunderstood the usage.
> >
> > What I really think is changing the start address from the address of
> > list_head to the address of the structure where list_head is embedded.
> >
> > In many cases I use list command, I found I can get the address of the
> > structure where the list_head embedded directly. And I can get the
> > offset of list_head by -o option. So the offset, say "+432" in your
> > example, can be omitted. What do you think of such change?
>
> That was also my suggestion. It would even turn "list -h" into something
> useful. ;-)
>
> Here's my attempt at a patch.
Plus the documentation part.
Petr
From: Petr Tesarik <ptesarik@xxxxxxx>
Subject: Document the "list -h" parameter
Mention the "-h" parameter in the output of "help list".
Signed-off-by: Petr Tesarik <ptesarik@xxxxxxx>
---
help.c | 3 +++
1 file changed, 3 insertions(+)
--- a/help.c
+++ b/help.c
@@ -4431,6 +4431,9 @@ char *help__list[] = {
" is pre-pended or not:",
" ",
" start The address of the first structure in the list.",
+" -h start The address of the first structure in the list. The \"next\"",
+" pointer is treated as a pointer to the embedded list_head,",
+" NOT to the containing structure.",
" -H start The address of the list_head structure, typically expressed",
" symbolically, but also can be an expression evaluating to the",
" address of the starting list_head structure.",
--
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