arm64: expand CFI shadow to cover 48-bit virtual addresses
Starting from Linux 4.7, arm64's defconfig enables 48-bit VAs, see:
https://git.kernel.org/torvalds/c/211102d8
On arm64, the CFI shadow configuration currently assumes that VAs
are 39-bit long, and as expected this results in a segfault on a
(defconfig) 4.7+ kernel, when linking a CFI-enabled library.
Consequently, this change increases the max target address to
account for the new max VA size.
Change-Id: I3fb808563fa77a457c65e9663da0613117332072
diff --git a/libc/private/CFIShadow.h b/libc/private/CFIShadow.h
index 26351db..9f980f8 100644
--- a/libc/private/CFIShadow.h
+++ b/libc/private/CFIShadow.h
@@ -62,7 +62,7 @@
static constexpr uintptr_t kCfiCheckAlign = 1UL << kCfiCheckGranularity; // 4K
#if defined(__aarch64__)
- static constexpr uintptr_t kMaxTargetAddr = 0x7fffffffff;
+ static constexpr uintptr_t kMaxTargetAddr = 0xffffffffffff;
#elif defined (__LP64__)
static constexpr uintptr_t kMaxTargetAddr = 0x7fffffffffff;
#else