tree 75236c38ea7ca400e71265bb93011ed2c588f5e3
parent 6d3f20d66b3876d62fad6a1f5ea7888eafc2b766
author Doru Gucea <doru-cristian.gucea@nxp.com> 1544814515 +0200
committer Simon Leet <simon.leet@microsoft.com> 1594233122 +0000

Avoid stack-allocation of large memory buffers

Using a stack-buffer with a size > 2K could easily produce a stack
overflow for an embedded device which has a limited stack size.
This commit dynamically allocates the large CSR buffer.

This commit avoids using a temporary buffer for storing the OIDs.
A single buffer is used:
a) OIDs are written backwards starting with the end of the buffer;
b) OIDs are memmove'd to the beginning of the buffer;
c) signature over this OIDs is computed and written backwards from the
end of the buffer;
d) the two memory regions are compacted.

Signed-off-by: Doru Gucea <doru-cristian.gucea@nxp.com>