[S] Change in coreboot[main]: commonlib/bsd/lz4_wrapper.c: Fix misaligned access

[Maximilian Brune (Code Review)]

Attention is currently required from: Angel Pons, Arthur Heymans, Julius Werner, Maximilian Brune, Nico Huber, Philipp Hug, Ron Minnich.

Hello Angel Pons, Arthur Heymans, Nico Huber, Philipp Hug, Ron Minnich, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/81910?usp=email

to look at the new patch set (#6).

The following approvals got outdated and were removed:
Code-Review+1 by Angel Pons, Code-Review+1 by Arthur Heymans, Code-Review+2 by Nico Huber, Verified+1 by build bot (Jenkins)

Change subject: commonlib/bsd/lz4_wrapper.c: Fix misaligned access
......................................................................

commonlib/bsd/lz4_wrapper.c: Fix misaligned access

Currently the HiFive Unleashed produces the following exception:
[DEBUG]  Exception:          Load address misaligned
[DEBUG]  Hart ID:            0
[DEBUG]  Previous mode:      machine
[DEBUG]  Bad instruction pc: 0x080010d0
[DEBUG]  Bad address:        0x08026ab3
[DEBUG]  Stored ra:          0x080010c8
[DEBUG]  Stored sp:          0x08010cc8

The coreboot LZ4 decompression code does some misaligned access during
decompression which the FU540 apparently does not support in SRAM.

Make the compiler generate code that adheres to natural alignment by
fixing the LZ4_readLE16() function and creating LZ4_readLE32().

Signed-off-by: Maximilian Brune 
Change-Id: Id165829bfd35be2bce2bbb019c208a304f627add
---
M src/commonlib/bsd/lz4_wrapper.c
1 file changed, 21 insertions(+), 7 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/10/81910/6