[PATCH] score/i386: Add context switch restore external symbol as a marker.

[Sebastian Huber]

Could we please use the _CPU_* prefix only for stuff defined by the CPU 
port interface and use something like _I386_* for things that are 
specific to a particular architecture.

On 22/07/16 03:17, Chris Johns wrote:
> Add an external symbol as a marker to the restore point in the
> context switch. If you set the IP to this location for a blocked
> thread and you use the saved register values in the TCB you can
> view the thread's context.
> ---
>   cpukit/score/cpu/i386/cpu_asm.S | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/cpukit/score/cpu/i386/cpu_asm.S b/cpukit/score/cpu/i386/cpu_asm.S
> index 45079a6..3c20fd4 100644
> --- a/cpukit/score/cpu/i386/cpu_asm.S
> +++ b/cpukit/score/cpu/i386/cpu_asm.S
> @@ -43,6 +43,7 @@
>   
>           .p2align  1
>           PUBLIC (_CPU_Context_switch)
> +        PUBLIC (_CPU_Context_switch_Restore_Marker)
>   
>   .set RUNCONTEXT_ARG,   4                   /* save context argument */
>   .set HEIRCONTEXT_ARG,  8                   /* restore context argument */
> @@ -75,6 +76,7 @@ SYM (_CPU_Context_switch):
>           movb      $1, I386_CONTEXT_CONTROL_IS_EXECUTING_OFFSET(eax)
>   #endif
>   
> +_CPU_Context_switch_Restore_Marker:
>   restore:
>           pushl     REG_EFLAGS(eax)          /* push eflags */
>           popf                               /* restore eflags */

-- 
Sebastian Huber, embedded brains GmbH

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