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authorDimitry Andric <dim@FreeBSD.org>2019-10-23 17:52:22 +0000
committerDimitry Andric <dim@FreeBSD.org>2019-10-23 17:52:22 +0000
commit3a1720af1d7f43edc5b214cde0be11bfb94d077e (patch)
tree029e0ff2d5e3c0eaf2405fd8e669555fdf5e1297 /lib/sanitizer_common/sanitizer_getauxval.h
parent8f3cadc28cb2bb9e8f9d69eeaaea1f57f2f7b2ab (diff)
downloadsrc-vendor/compiler-rt.tar.gz
src-vendor/compiler-rt.zip
Vendor import of stripped compiler-rt trunk r375505, the last commitvendor/compiler-rt/compiler-rt-trunk-r375505vendor/compiler-rt
before the upstream Subversion repository was made read-only, and the LLVM project migrated to GitHub: https://llvm.org/svn/llvm-project/compiler-rt/trunk@375505
Notes
Notes: svn path=/vendor/compiler-rt/dist/; revision=353944 svn path=/vendor/compiler-rt/compiler-rt-r375505/; revision=353945; tag=vendor/compiler-rt/compiler-rt-trunk-r375505
Diffstat (limited to 'lib/sanitizer_common/sanitizer_getauxval.h')
-rw-r--r--lib/sanitizer_common/sanitizer_getauxval.h30
1 files changed, 21 insertions, 9 deletions
diff --git a/lib/sanitizer_common/sanitizer_getauxval.h b/lib/sanitizer_common/sanitizer_getauxval.h
index cbd1af12c04f..86ad3a5e2c2a 100644
--- a/lib/sanitizer_common/sanitizer_getauxval.h
+++ b/lib/sanitizer_common/sanitizer_getauxval.h
@@ -9,6 +9,7 @@
// 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.
//
//===----------------------------------------------------------------------===//
@@ -16,15 +17,10 @@
#define SANITIZER_GETAUXVAL_H
#include "sanitizer_platform.h"
+#include "sanitizer_glibc_version.h"
#if SANITIZER_LINUX || SANITIZER_FUCHSIA
-# include <features.h>
-
-# ifndef __GLIBC_PREREQ
-# define __GLIBC_PREREQ(x, y) 0
-# endif
-
# if __GLIBC_PREREQ(2, 16) || (SANITIZER_ANDROID && __ANDROID_API__ >= 21) || \
SANITIZER_FUCHSIA
# define SANITIZER_USE_GETAUXVAL 1
@@ -38,10 +34,26 @@
// The weak getauxval definition allows to check for the function at runtime.
// This is useful for Android, when compiled at a lower API level yet running
// on a more recent platform that offers the function.
-extern "C" SANITIZER_WEAK_ATTRIBUTE
-unsigned long getauxval(unsigned long type); // NOLINT
+extern "C" SANITIZER_WEAK_ATTRIBUTE unsigned long getauxval(unsigned long type);
# 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