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Lu" Date: Tue, 19 Mar 2024 11:36:11 -0700 Message-ID: Subject: [PATCH] gdbserver: Clear X86_XSTATE_MPX bits in xcr0 on x32 To: GDB , John Baldwin , Felix Willgerodt X-Spam-Status: No, score=-3019.2 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces+patchwork=sourceware.org@sourceware.org Since MPX isn't available for x32, we should clear X86_XSTATE_MPX bits on x32. PR server/31511 * linux-x86-low.cc (x86_linux_read_description): Clear X86_XSTATE_MPX bits in xcr0 on x32. --- gdbserver/linux-x86-low.cc | 4 ++++ 1 file changed, 4 insertions(+) -- 2.44.0 diff --git a/gdbserver/linux-x86-low.cc b/gdbserver/linux-x86-low.cc index 3af0a009052..28b5d523b8e 100644 --- a/gdbserver/linux-x86-low.cc +++ b/gdbserver/linux-x86-low.cc @@ -938,6 +938,10 @@ x86_linux_read_description (void) xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET / sizeof (uint64_t))]; + /* No MPX on x32. */ + if (!is_elf64) + xcr0 &= ~X86_XSTATE_MPX; + xsave_len = x86_xsave_length (); /* Use PTRACE_GETREGSET if it is available. */