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libsanitizer: cherry-pick commit b226894d475b from upstream
author
H.J. Lu
<hjl.tools@gmail.com>
Thu, 5 May 2022 20:59:16 +0000
(13:59 -0700)
committer
H.J. Lu
<hjl.tools@gmail.com>
Thu, 5 May 2022 20:59:16 +0000
(13:59 -0700)
cherry-pick:
b226894d475b
[sanitizer] [sanitizer] Correct GetTls for x32
libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
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diff --git
a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
index
d966d85
..
620267c
100644
(file)
--- 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();