[ARC,DOC] Add documentation naked, ilink and firq

Hi Sandra, Andrew

Please find a small patch on the documentation which adds info about naked, ilink and firq function attributes.

Ok to apply?
Claudiu

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* doc/extend.texi (ARC Function Attributes): Update info.
---
 gcc/doc/extend.texi | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

2.21.0

* Claudiu Zissulescu <claziss@gmail.com> [2019-06-06 10:37:09 +0300]:

> Hi Sandra, Andrew
> 
> Please find a small patch on the documentation which adds info about naked, ilink and firq function attributes.
> 
> Ok to apply?
> Claudiu
> 
> gcc/
> xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>
> 
> 	* doc/extend.texi (ARC Function Attributes): Update info.

This change looks good to me.

Thanks,
Andrew


> ---
>  gcc/doc/extend.texi | 14 +++++++++++++-
>  1 file changed, 13 insertions(+), 1 deletion(-)
> 
> diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
> index e8563fd0803..c2e675afa0f 100644
> --- a/gcc/doc/extend.texi
> +++ b/gcc/doc/extend.texi
> @@ -4139,7 +4139,8 @@ void f () __attribute__ ((interrupt ("ilink1")));
>  @end smallexample
>  
>  Permissible values for this parameter are: @w{@code{ilink1}} and
> -@w{@code{ilink2}}.
> +@w{@code{ilink2}} for ARCv1 architecture, and @w{@code{ilink}} and
> +@w{@code{firq}} for ARCv2 architecture.
>  
>  @item long_call
>  @itemx medium_call
> @@ -4182,7 +4183,17 @@ This attribute allows one to mark secure-code functions that are
>  callable from normal mode.  The location of the secure call function
>  into the @code{sjli} table needs to be passed as argument.
>  
> +@item naked
> +@cindex @code{naked} function attribute, ARC
> +This attribute allows the compiler to construct the requisite function
> +declaration, while allowing the body of the function to be assembly
> +code.  The specified function will not have prologue/epilogue sequences
> +generated by the compiler.  Only basic @code{asm} statements can safely
> +be included in naked functions (@pxref{Basic Asm}).  While using
> +extended @code{asm} or a mixture of basic @code{asm} and C code may
> +appear to work, they cannot be depended upon to work reliably and are
> +not supported.
> +
>  @end table
>  
>  @node ARM Function Attributes
> -- 
> 2.21.0
>

Thank you for your review,
Claudiu

On Wed, Jun 12, 2019 at 12:00 AM Andrew Burgess
<andrew.burgess@embecosm.com> wrote:
>
> * Claudiu Zissulescu <claziss@gmail.com> [2019-06-06 10:37:09 +0300]:
>
> > Hi Sandra, Andrew
> >
> > Please find a small patch on the documentation which adds info about naked, ilink and firq function attributes.
> >
> > Ok to apply?
> > Claudiu
> >
> > gcc/
> > xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>
> >
> >       * doc/extend.texi (ARC Function Attributes): Update info.
>
> This change looks good to me.
>
> Thanks,
> Andrew
>
>
> > ---
> >  gcc/doc/extend.texi | 14 +++++++++++++-
> >  1 file changed, 13 insertions(+), 1 deletion(-)
> >
> > diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
> > index e8563fd0803..c2e675afa0f 100644
> > --- a/gcc/doc/extend.texi
> > +++ b/gcc/doc/extend.texi
> > @@ -4139,7 +4139,8 @@ void f () __attribute__ ((interrupt ("ilink1")));
> >  @end smallexample
> >
> >  Permissible values for this parameter are: @w{@code{ilink1}} and
> > -@w{@code{ilink2}}.
> > +@w{@code{ilink2}} for ARCv1 architecture, and @w{@code{ilink}} and
> > +@w{@code{firq}} for ARCv2 architecture.
> >
> >  @item long_call
> >  @itemx medium_call
> > @@ -4182,7 +4183,17 @@ This attribute allows one to mark secure-code functions that are
> >  callable from normal mode.  The location of the secure call function
> >  into the @code{sjli} table needs to be passed as argument.
> >
> > +@item naked
> > +@cindex @code{naked} function attribute, ARC
> > +This attribute allows the compiler to construct the requisite function
> > +declaration, while allowing the body of the function to be assembly
> > +code.  The specified function will not have prologue/epilogue sequences
> > +generated by the compiler.  Only basic @code{asm} statements can safely
> > +be included in naked functions (@pxref{Basic Asm}).  While using
> > +extended @code{asm} or a mixture of basic @code{asm} and C code may
> > +appear to work, they cannot be depended upon to work reliably and are
> > +not supported.
> > +
> >  @end table
> >
> >  @node ARM Function Attributes
> > --
> > 2.21.0
> >