Gator.ko fails to build

[jasvinderkhurana]

I am trying to build gator kernel module(DS-5 v5.29.2), but when I build using 5.4.0 kernel version it fails to build with below error. Can you please guide how can I build the gator.ko for 5.4.0 kernel.

In file included from /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c:270: /scratch/Work/Gator/SOM/gator_29/driver/gator_backtrace.c: In function ‘arm_backtrace_eabi’: /scratch/Work/Gator/SOM/gator_29/driver/gator_backtrace.c:260:74: error: macro "access_ok" passed 3 arguments, but takes just 2 260	if (!access_ok(VERIFY_READ, curr, sizeof(struct stack_frame_eabi))			^ In file included from ./include/linux/uaccess.h:11, from ./include/linux/highmem.h:9, from /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c:21: ./arch/arm64/include/asm/uaccess.h:90: note: macro "access_ok" defined here 90	#define access_ok(addr, size) __range_ok(addr, size)

In file included from /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c:270: /scratch/Work/Gator/SOM/gator_29/driver/gator_backtrace.c:260:14: error: ‘access_ok’ undeclared (first use in this function) 260 | if (!access_ok(VERIFY_READ, curr, sizeof(struct stack_frame_eabi)) || | ^~~~~ /scratch/Work/Gator/SOM/gator_29/driver/gator_backtrace.c:260:14: note: each undeclared identifier is reported only once for each function it appears in /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c: In function ‘gator_summary’: /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c:804:5: error: implicit declaration of function ‘get_monotonic_boottime’ [-Werror=implicit-function-declaration] 804 | get_monotonic_boottime(&ts); | ^~~~~~ /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c: In function ‘gator_new_tracepoint_module’: /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c:1396:41: error: initialization of ‘struct tracepoint const’ from incompatible pointer type ‘const tracepoint_ptr_t ’ {aka ‘const int ’} [-Werror=incompatible-pointer-types] 1396 | struct tracepoint const begin = tp_mod->mod->tracepoints_ptrs; | ^~ /scratch/Work/Gator/SOM/gator_29/driver/gator_main.c:1397:39: error: initialization of ‘struct tracepoint const’ from incompatible pointer type ‘const tracepoint_ptr_t ’ {aka ‘const int ’} [-Werror=incompatible-pointer-types] 1397 | struct tracepoint const end = tp_mod->mod->tracepoints_ptrs + tp_mod->mod->num_tracepoints;

Also I see that now the driver source is also not provided in the github repo, and neither with latest ARM developmen Studio 2020.1

Please guide

[bengaineyarm]

Hi

gator.ko has been deprecated since 2019.1 and removed since 2020.0. It is not required; instead you can use gatord on its own.

DS5 5.29.2 contains Streamline 6.7 which was released in July-2018, whereas kernel 5.4 was released on 24-Nov-2019. The later is not expected to support the former.

Our recomendation is to update to the most recent version of DS, but if for some reason that is not possible, you may be able to resolve this issue yourself by:

• You should be able to modify the offending gator.ko sources by backporting modifications made in a later version of gator.ko. The last version to contain gator.ko was 7.1.
• You may be able to modify version 7.1's gator.ko sources to run with gatord from DS5 5.29.2; Modify https://github.com/ARM-software/gator/blob/7.1/driver/gator_main.c#L11 setting #define PROTOCOL_VERSION <X> where should match the version currently defined in that file (either 670, or 671).

Regards Ben

[jasvinderkhurana]

Thanks for your quick reply Ben. I switched to the latest version of ARM Development Studio and I used the gatard demon to get the profiling data.

I am able to connect using this daemon, but I am not getting any vertex and Fragment processor information in the graph. How Can I enable to get vertex and fragment processor information to debug Mali 400 Graphics applications?

[bengaineyarm]

Ah, i see. If you are using Mali 400, you will need to stick with gator.ko. We don't support such old GPU in recent versions of Streamline. In this case, the best option is to use DS 2019.1, available here https://developer.arm.com/tools-and-software/embedded/arm-development-studio/downloads and being the last version to support gator.ko and therefore Mali 400.