From: H.J. Lu <hjl.tools@gmail.com>
Date: Thu, 5 May 2022 20:59:16 +0000 (-0700)
Subject: libsanitizer: cherry-pick commit b226894d475b from upstream
X-Git-Tag: basepoints/gcc-14~7062
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a48be2e513d9ddb2fa8800a158f18502a0923aec;p=thirdparty%2Fgcc.git

libsanitizer: cherry-pick commit b226894d475b from upstream

cherry-pick:

b226894d475b [sanitizer] [sanitizer] Correct GetTls for x32
---

diff --git a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
index d966d857a76..620267cdd02 100644
--- a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
@@ -462,7 +462,11 @@ static void GetTls(uptr *addr, uptr *size) {
 #elif SANITIZER_GLIBC && defined(__x86_64__)
   // For aarch64 and x86-64, use an O(1) approach which requires relatively
   // precise ThreadDescriptorSize. g_tls_size was initialized in InitTlsSize.
+#  if SANITIZER_X32
+  asm("mov %%fs:8,%0" : "=r"(*addr));
+#  else
   asm("mov %%fs:16,%0" : "=r"(*addr));
+#  endif
   *size = g_tls_size;
   *addr -= *size;
   *addr += ThreadDescriptorSize();