* Question about strings of string_choices.h
@ 2025-02-25 1:43 Kuninori Morimoto
2025-02-25 3:29 ` Kees Cook
0 siblings, 1 reply; 3+ messages in thread
From: Kuninori Morimoto @ 2025-02-25 1:43 UTC (permalink / raw)
To: Kees Cook, Andy Shevchenko; +Cc: linux-hardening, linux-kernel
Hi Kees, Andy
I would like to use string_choices helper, and want to add well used
but not yet supported strings. But before that I would like to ask one
thing about it.
I wonder is it guaranteed that the strings were persist after the
function returned ? In normally, function local variable will disappear
when it returns from the function. But I'm not sure in case of
static inline const, etc.
If it is guaranteed, I'm very happy.
Thank you for your help !!
Best regards
---
Kuninori Morimoto
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Question about strings of string_choices.h
2025-02-25 1:43 Question about strings of string_choices.h Kuninori Morimoto
@ 2025-02-25 3:29 ` Kees Cook
2025-02-25 3:40 ` Kuninori Morimoto
0 siblings, 1 reply; 3+ messages in thread
From: Kees Cook @ 2025-02-25 3:29 UTC (permalink / raw)
To: Kuninori Morimoto; +Cc: Andy Shevchenko, linux-hardening, linux-kernel
On Tue, Feb 25, 2025 at 01:43:55AM +0000, Kuninori Morimoto wrote:
>
> Hi Kees, Andy
>
> I would like to use string_choices helper, and want to add well used
> but not yet supported strings. But before that I would like to ask one
> thing about it.
>
> I wonder is it guaranteed that the strings were persist after the
> function returned ? In normally, function local variable will disappear
> when it returns from the function. But I'm not sure in case of
> static inline const, etc.
>
> If it is guaranteed, I'm very happy.
Yes, the compiler puts them in the .rodata section, so they will always
be present.
-Kees
--
Kees Cook
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Question about strings of string_choices.h
2025-02-25 3:29 ` Kees Cook
@ 2025-02-25 3:40 ` Kuninori Morimoto
0 siblings, 0 replies; 3+ messages in thread
From: Kuninori Morimoto @ 2025-02-25 3:40 UTC (permalink / raw)
To: Kees Cook; +Cc: Andy Shevchenko, linux-hardening, linux-kernel
Hi Kees
> > I would like to use string_choices helper, and want to add well used
> > but not yet supported strings. But before that I would like to ask one
> > thing about it.
> >
> > I wonder is it guaranteed that the strings were persist after the
> > function returned ? In normally, function local variable will disappear
> > when it returns from the function. But I'm not sure in case of
> > static inline const, etc.
> >
> > If it is guaranteed, I'm very happy.
>
> Yes, the compiler puts them in the .rodata section, so they will always
> be present.
Thanks. Nice to know !
Best regards
---
Kuninori Morimoto
^ permalink raw reply [flat|nested] 3+ messages in thread
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