Hello everyone,
I am modifying the pocl code to add support for FPGA device. So i make
changes in pocl source code as per my requirement.
Basically, I want to create OpenCL kernel using program binary (obtained
from FPGA device) as shown below:
The content of my kernel source code (dummy.cl) is ::
__kernel void dummyKernel(__global uchar *a,
__global uchar *b,
__global uchar *c)
{
/*
Dummy Kernel for MSO_2003 bitfiles
*/
size_t id = get_global_id(0);
}
Note: I assume that I have binary data to be run on FPGA.
1. //creating binary using clGetProgramInfo() as :
//first call to get size of binary ...
assume num_devices = 1;
ret = clGetProgramInfo(program, CL_PROGRAM_BINARY_SIZES, num_devices *
sizeof(size_t), &binary_sizes, NULL);
//second call to read the binary info....
ret = clGetProgramInfo(program, CL_PROGRAM_BINARIES, num_devices *
sizeof(size_t), binaries, NULL);
2. //use this binary to create OpenCL Program object using
clCreateProgramWithBinary()
program = clCreateProgramWithBinary(context, num_devices, devices,
(const size_t *)binary_sizes, (const unsigned char **)binaries,
&binary_status, &ret);
if(ret)
{
printf("failed While creating program using Binaries with ret =
%d\n", ret);
return ret;
}
3. //use this Program object to create OpenCL Kernel using clCreateKernel()
kernel[icount] = clCreateKernel(program, "dummyKernel", &ret);
4. other stuff
I compiled the above code using pocl library.
While running I got segmentation fault at line "clCreateKernel". Using gdb,
it shows that the problem is in line no. 166 as shown below:
*Program received signal SIGSEGV, Segmentation fault.*
*0x00007ffff71e4a42 in POclCreateKernel (program=0x613c70,
kernel_name=<optimized out>, errcode_ret=<optimized out>) at
clCreateKernel.c:166*
*166 kernel->num_args = *(cl_uint *) lt_dlsym(dlhandle, "_num_args"); *
Can anyone tell me what is going on there?
Note: The same is working fine if device_type is CL_DEVICE_TYPE_CPU, but
when I changed it with CL_DEVICE_TYPE_ACCELERATOR, it shows the above error.
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