Module Name: src
Committed By: kamil
Date: Fri Sep 11 01:08:36 UTC 2020
Modified Files:
src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common:
sanitizer_getauxval.h
Log Message:
Add getauxval() compat for NetBSD
Cherry-pick and adapt:
commit 02519fc7a6f8c528f67975a9f78ce64dabf402b4
Author: Kamil Rytarowski <[email protected]>
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
To generate a diff of this commit:
cvs rdiff -u -r1.1.1.1 -r1.2 \
src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h
diff -u src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h:1.1.1.1 src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h:1.2
--- src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h:1.1.1.1 Sat Sep 5 07:52:57 2020
+++ src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_getauxval.h Fri Sep 11 01:08:36 2020
@@ -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 @@ extern "C" SANITIZER_WEAK_ATTRIBUTE
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
