tree ecf33465fd4bbfc9d44097bf6a01a06bdf56384d
parent e219a4179fa58d4b553910ca26ed85b7d2f59461
author Kalesh Singh <kaleshsingh@google.com> 1692824393 -0700
committer Kalesh Singh <kaleshsingh@google.com> 1692824397 -0700

bionic: CFIShadow: Remove use of PAGE_SIZE macro.

The alignment of kShadowSize to a page sized multiple is
not explicitly needed, since mmap() will return a page-sized
multiple mapping.

kCfiCheckAlign remains 4k as this is chosen by the clang
compiler. [1] [2]

[1] https://github.com/llvm/llvm-project/blob/3568976375e305a7a41d62b9164ede7571ee16c5/clang/lib/CodeGen/CGExpr.cpp#L3433

[2] https://clang.llvm.org/docs/ControlFlowIntegrityDesign.html#cfi-shadow

Bug: 296275298
Test: Boot 16kb device, check no cfi failures.
Test: atest -c bionic-unit-tests
Change-Id: Iac0c129c413afe01389f529f5c64051c4ffff2df
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>