Re: [XenAccess-devel] Exposing symbol map functions

[Bryan D. P. <br...@th...>]

Thanks.  The patch is now in the repository.
-bryan


On Nov 29, 2007 2:41 PM,  <hi...@cc...> wrote:
> Here's a small patch that adds xa_symbol_to_address
> to the public API.  It simply redirects to the appropriate
> symbol translation functions in the linux and windows
> layers.
>
> There are times when I want to know the address of a
> symbol without mapping it.
>
> -Jim
>
> Index: xa_util.c
> ===================================================================
> --- xa_util.c   (revision 99)
> +++ xa_util.c   (working copy)
> @@ -163,6 +163,17 @@
>       }
>   }
>
> +int xa_symbol_to_address (
> +       xa_instance_t* instance, char* sym, uint32_t* vaddr)
> +{
> +       if(XA_OS_LINUX == instance->os_type)
> +               return linux_system_map_symbol_to_address(instance,
> sym, vaddr);
> +       else if(XA_OS_WINDOWS == instance->os_type)
> +               return windows_symbol_to_address(instance, sym, vaddr);
> +       else
> +               return XA_FAILURE;
> +}
> +
>   int xa_get_bit (unsigned long reg, int bit)
>   {
>       unsigned long mask = 1 << bit;
> Index: xenaccess.h
> ===================================================================
> --- xenaccess.h (revision 99)
> +++ xenaccess.h (working copy)
> @@ -334,6 +334,16 @@
>   int xa_read_long_long_mach (
>           xa_instance_t *instance, uint32_t maddr, uint64_t *value);
>
> +/**
> + * Returns the address of a symbol.
> + *
> + * @param[in] instance XenAccess instance
> + * @param[in] sym Kernel symbol (must be exported)
> + * @param[out] vaddr The virtual address of the symbol
> + */
> +int xa_symbol_to_address (
> +        xa_instance_t *instance, char* sym, uint32_t *vaddr);
> +
>   /*-----------------------------
>    * Linux-specific functionality
>    */
>
>
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-- 
Bryan D. Payne
Graduate Student, Computer Science
Georgia Tech Information Security Center
http://www.bryanpayne.org