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userspace: add additional debug to elf_helper

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Devices are identified as belonging to a particular subsystem
by looking at device->driver_api.

Print some debug information if this is NULL or points to an
unrecognized API struct.

This is normal in a lot of cases, for example any use of SYS_INIT().
However, for real devices this may be an indication of mis-
configuration.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2018-12-03 08:37:27 -08:00 • committed by Andrew Boie
commit c7b7363da8
1 changed files with 6 additions and 0 deletions
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6
scripts/elf_helper.py
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@ -500,6 +500,12 @@ class ElfHelper:
# if it has one.
apiaddr = device_get_api_addr(self.elf, addr)
if apiaddr not in all_objs:
if apiaddr == 0:
self.debug("device instance at 0x%x has no associated subsystem"
% addr);
else:
self.debug("device instance at 0x%x has unknown API 0x%x"
% (addr, apiaddr));
# API struct does not correspond to a known subsystem, skip it
continue