Implement KHR ICD extension

This adds a pointer to the dispatch table at the beginning of every object
of type

 - cl_command_queue
 - cl_context
 - cl_device_id
 - cl_event
 - cl_kernel
 - cl_mem
 - cl_platform_id
 - cl_program
 - cl_sampler

as required by the ICD specification. The layout of the dispatch table
comes from the OpenCL ICD loader by Brice Videau <brice.videau@imag.fr> and
Vincent Danjean <Vincent.Danjean@ens-lyon.org>.

To avoid dispatch table entries being overwritten with the ICD loader's
implementations of the CL functions (as would be the proper behaviour for
the ELF loader), the -Bsymbolic option is given to the linker.

Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/cl_program.c b/src/cl_program.c
index ecffb001..0c48ef30 100644
--- a/src/cl_program.c
+++ b/src/cl_program.c
@@ -23,6 +23,7 @@
 #include "cl_context.h"
 #include "cl_alloc.h"
 #include "cl_utils.h"
+#include "cl_khr_icd.h"
 #include "CL/cl.h"
 #include "CL/cl_intel.h"
 
@@ -91,6 +92,7 @@ cl_program_new(cl_context ctx)
 
   /* Allocate the structure */
   TRY_ALLOC_NO_ERR (p, CALLOC(struct _cl_program));
+  SET_ICD(p->dispatch)
   p->ref_n = 1;
   p->magic = CL_MAGIC_PROGRAM_HEADER;
   p->ctx = ctx;