tree 73c81dbd65cebf949a5be00bc14d406489e93fe1
parent 68df6eb0f2568e39175fc3a3c7ccbbf00e742b31
author Jens Wiklander <jens.wiklander@linaro.org> 1558968178 +0200
committer Joakim Bech <joakim.bech@linaro.org> 1559041103 +0200

libmbedtls: mbedtls_mpi_exp_mod(): optimize mempool usage

With W allocated in the mempool instead of the stack it is more important
to utilize the mempool in a stack like way.

With this patch allocation and initialization of W is moved to a point
where all following mempool allocations are free before the function
returns.

This reduces maximum memory consumption of mempool in regression case
8101 for an AArch64 TA in from 17280 to 7640 bytes. Figures for an
AArch32 TA are 12040 to 5288 bytes.

Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>