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| author | Fabio Baltieri <fabiobaltieri@google.com> | 2022-03-14 18:28:55 +0000 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2022-03-16 18:03:22 +0000 |
| commit | f670792c75b531959010669b1deb2aeb987c974c (patch) | |
| tree | c9d64d4f3fe7152c837efdd3966afd86ef9dc7a3 | |
| parent | a18b111e3cb010e168abd4408c6c5b884dbc0b3e (diff) | |
| download | chrome-ec-f670792c75b531959010669b1deb2aeb987c974c.tar.gz | |
zephyr: CMakeLists: set -mno-unaligned-access
GCC can generate unaligned access instructions by default, for example:
*data = buf[1] | (buf[2] << 8) | (buf[3] << 16) | (buf[4] << 24);
0x10084ac0 <+84>: itte eq
0x10084ac2 <+86>: ldreq.w r3, [sp, #17] <-- this one
0x10084ac6 <+90>: streq r3, [r7, #0]
Set -mno-unaligned-access to enforce byte access on all structures.
BRANCH=none
BUG=b:223234903
TEST=checked the disassembled code, ran with unaligned access trap
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Change-Id: I8b559806b1fe9044c7401f4f8d4126a71657c308
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3521786
Reviewed-by: Keith Short <keithshort@chromium.org>
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
| -rw-r--r-- | zephyr/CMakeLists.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/zephyr/CMakeLists.txt b/zephyr/CMakeLists.txt index 964047201f..cae062a13e 100644 --- a/zephyr/CMakeLists.txt +++ b/zephyr/CMakeLists.txt @@ -63,6 +63,9 @@ if(DEFINED CONFIG_PLATFORM_EC) endif() endif() +# Set extra compiler flags. +zephyr_cc_option(-mno-unaligned-access) + # The EC application is split into two libraries: # app: contains all the legacy code # ec_shim: contains all the code under platform/ec/shim |