libsanitizer: Restore internal_readlink for x32
Cherry-pick compiler-rt revision 354451:
r316591 has
@@ -389,13 +383,11 @@ uptr internal_dup2(int oldfd, int newfd) {
}
uptr internal_readlink(const char *path, char *buf, uptr bufsize) {
-#if SANITIZER_NETBSD
- return internal_syscall_ptr(SYSCALL(readlink), path, buf, bufsize);
-#elif SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
+#if SANITIZER_USES_CANONICAL_LINUX_SYSCALLS
return internal_syscall(SYSCALL(readlinkat), AT_FDCWD,
(uptr)path, (uptr)buf, bufsize);
#else
- return internal_syscall(SYSCALL(readlink), (uptr)path, (uptr)buf, bufsize);
+ return internal_syscall_ptr(SYSCALL(readlink), path, buf, bufsize);
#endif
}
which dropped the (uptr) cast and broke x32. This patch puts back the
(uptr) cast to restore x32 and fixes:
https://bugs.llvm.org/show_bug.cgi?id=40783
Differential Revision: https://reviews.llvm.org/D58413
PR sanitizer/89409
* sanitizer_common/sanitizer_linux.cc (internal_readlink):
Cherry-pick compiler-rt r354451.
From-SVN: r269042
