From: "H.J. Lu" <hjl.tools@gmail.com>
To: gdb-patches@sourceware.org
Cc: felix.willgerodt@intel.com, jhb@FreeBSD.org
Subject: [PATCH v2] gdbserver: Clear X86_XSTATE_MPX bits in xcr0 on x32
Date: Wed, 20 Mar 2024 04:13:18 -0700 [thread overview]
Message-ID: <20240320111318.117728-1-hjl.tools@gmail.com> (raw)
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(+)
diff --git a/gdbserver/linux-x86-low.cc b/gdbserver/linux-x86-low.cc
index 3af0a009052..933d1fb012a 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 (machine == EM_X86_64 && !is_elf64)
+ xcr0 &= ~X86_XSTATE_MPX;
+
xsave_len = x86_xsave_length ();
/* Use PTRACE_GETREGSET if it is available. */
--
2.44.0
next reply other threads:[~2024-03-20 11:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-20 11:13 H.J. Lu [this message]
2024-03-20 14:45 ` Willgerodt, Felix
2024-03-21 17:29 ` John Baldwin
2024-03-23 11:29 ` Andrew Burgess
2024-03-23 16:39 ` Andrew Burgess
2024-03-23 17:08 ` H.J. Lu
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