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* [ARM] Thumb-2 breakpoint size for remote protocol
@ 2010-03-08 13:34 Matthew Gretton-Dann
  2010-03-08 13:43 ` Jonas Maebe
  0 siblings, 1 reply; 3+ messages in thread
From: Matthew Gretton-Dann @ 2010-03-08 13:34 UTC (permalink / raw)
  To: gdb

Hi,

arm_remote_breakpoint_from_pc (in gdb/arm-tdep.c around line 5121)
contains the following comment:

  if (arm_pc_is_thumb (*pcptr) && *kindptr == 4)
    /* The documented magic value for a 32-bit Thumb-2 breakpoint, so
       that this is not confused with a 32-bit ARM breakpoint.  */
    *kindptr = 3;

I can't find the documentation which gives the magic value.  Could
someone direct me to it please?

Thanks,

Matt

-- 
Matthew Gretton-Dann
Principal Engineer - Tools, PD Software
ARM Limited


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [ARM] Thumb-2 breakpoint size for remote protocol
  2010-03-08 13:34 [ARM] Thumb-2 breakpoint size for remote protocol Matthew Gretton-Dann
@ 2010-03-08 13:43 ` Jonas Maebe
  2010-03-08 15:20   ` Daniel Jacobowitz
  0 siblings, 1 reply; 3+ messages in thread
From: Jonas Maebe @ 2010-03-08 13:43 UTC (permalink / raw)
  To: Matthew Gretton-Dann; +Cc: gdb

Hi Matthew :)

On 08 Mar 2010, at 14:33, Matthew Gretton-Dann wrote:

> arm_remote_breakpoint_from_pc (in gdb/arm-tdep.c around line 5121)
> contains the following comment:
>
>  if (arm_pc_is_thumb (*pcptr) && *kindptr == 4)
>    /* The documented magic value for a 32-bit Thumb-2 breakpoint, so
>       that this is not confused with a 32-bit ARM breakpoint.  */
>    *kindptr = 3;
>
> I can't find the documentation which gives the magic value.  Could
> someone direct me to it please?

I guess this is what that comment refers to: http://sourceware.org/gdb/current/onlinedocs/gdb/Architecture_002dSpecific-Protocol-Details.html


Jonas


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: [ARM] Thumb-2 breakpoint size for remote protocol
  2010-03-08 13:43 ` Jonas Maebe
@ 2010-03-08 15:20   ` Daniel Jacobowitz
  0 siblings, 0 replies; 3+ messages in thread
From: Daniel Jacobowitz @ 2010-03-08 15:20 UTC (permalink / raw)
  To: Jonas Maebe; +Cc: Matthew Gretton-Dann, gdb

On Mon, Mar 08, 2010 at 02:43:11PM +0100, Jonas Maebe wrote:
> Hi Matthew :)
> 
> On 08 Mar 2010, at 14:33, Matthew Gretton-Dann wrote:
> 
> >arm_remote_breakpoint_from_pc (in gdb/arm-tdep.c around line 5121)
> >contains the following comment:
> >
> > if (arm_pc_is_thumb (*pcptr) && *kindptr == 4)
> >   /* The documented magic value for a 32-bit Thumb-2 breakpoint, so
> >      that this is not confused with a 32-bit ARM breakpoint.  */
> >   *kindptr = 3;
> >
> >I can't find the documentation which gives the magic value.  Could
> >someone direct me to it please?
> 
> I guess this is what that comment refers to: http://sourceware.org/gdb/current/onlinedocs/gdb/Architecture_002dSpecific-Protocol-Details.html

Yes, that's the one.  Matthew, if there's somewhere else you looked
for this that could use a cross-reference, let us know (or feel free
to post a patch :-).

-- 
Daniel Jacobowitz
CodeSourcery


^ permalink raw reply	[flat|nested] 3+ messages in thread
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2010-03-08 13:34 [ARM] Thumb-2 breakpoint size for remote protocol Matthew Gretton-Dann
2010-03-08 13:43 ` Jonas Maebe
2010-03-08 15:20   ` Daniel Jacobowitz

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