cbmem utility: compatibility with older coreboot versions

Commit b8ad224 changed the memory address in lb_cbmem_ref coreboot
table entries from a pointer to a uint64_t. This change was introduced
to make the cbmem utility work on both 32bit and 64bit userland.
Unfortunately, this broke the cbmem utility running on older versions
of coreboot because they were still providing a 32bit only field for
the address while the cbmem utility would now take the following 4
bytes as upper 32bits of a pointer that can obviously not be
mmapped. This change checks if the size of the lb_cbmem_ref structure
provided by coreboot is smaller than expected, and if so, ignore the
upper 32bit of the address read.

Signed-off-by: Stefan Reinauer <reinauer@google.com>

Change-Id: If4c8e9b72b2a38c961c11d7071b728e61e5f1d18
Commit-Queue: Stefan Reinauer <reinauer@google.com>
Tested-by: Stefan Reinauer <reinauer@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/4139
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

0 files changed, 0 insertions, 0 deletions