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[src/trunk]: src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common Add get...
details: https://anonhg.NetBSD.org/src/rev/f5e6334d125a
branches: trunk
changeset: 943794:f5e6334d125a
user: kamil <kamil%NetBSD.org@localhost>
date: Fri Sep 11 01:08:36 2020 +0000
description:
Add getauxval() compat for NetBSD
Cherry-pick and adapt:
commit 02519fc7a6f8c528f67975a9f78ce64dabf402b4
Author: Kamil Rytarowski <n54%gmx.com@localhost>
Date: Thu Sep 12 18:57:58 2019 +0000
Add getauxval() compat for NetBSD
Summary:
getauxval() is not available on NetBSD and there is no a direct equivalent.
Add a function that implements the same semantics with NetBSD internals.
Reorder the GetPageSize() functions to prefer the sysctl approach for NetBSD.
It no longer makes a difference which approach is better. Avoid changing
conditional code path.
Reviewers: vitalybuka, dvyukov, mgorny, joerg
Reviewed By: vitalybuka
Subscribers: llvm-commits, #sanitizers
Tags: #sanitizers, #llvm
Differential Revision: https://reviews.llvm.org/D67329
llvm-svn: 371758
diffstat:
external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h | 20 +++++++++-
1 files changed, 19 insertions(+), 1 deletions(-)
diffs (36 lines):
diff -r 94a0fa10447b -r f5e6334d125a external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h
--- a/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h Fri Sep 11 01:07:53 2020 +0000
+++ b/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h Fri Sep 11 01:08:36 2020 +0000
@@ -8,6 +8,7 @@
// Common getauxval() guards and definitions.
// getauxval() is not defined until glibc version 2.16, or until API level 21
// for Android.
+// Implement the getauxval() compat function for NetBSD.
//
//===----------------------------------------------------------------------===//
@@ -41,6 +42,23 @@
unsigned long getauxval(unsigned long type); // NOLINT
# endif
-#endif // SANITIZER_LINUX || SANITIZER_FUCHSIA
+#elif SANITIZER_NETBSD
+
+#define SANITIZER_USE_GETAUXVAL 1
+
+#include <dlfcn.h>
+#include <elf.h>
+
+static inline decltype(AuxInfo::a_v) getauxval(decltype(AuxInfo::a_type) type) {
+ for (const AuxInfo *aux = (const AuxInfo *)_dlauxinfo();
+ aux->a_type != AT_NULL; ++aux) {
+ if (type == aux->a_type)
+ return aux->a_v;
+ }
+
+ return 0;
+}
+
+#endif
#endif // SANITIZER_GETAUXVAL_H
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