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gdbserver: Clear X86_XSTATE_MPX bits in xcr0 on x32

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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.
Reviewed-by: Felix Willgerodt <felix.willgerodt@intel.com>
This commit is contained in:
H.J. Lu
2024-03-20 04:13:18 -07:00
parent 7e949f0870
commit 4bb20a6244
1 changed files with 4 additions and 0 deletions
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4
gdbserver/linux-x86-low.cc
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@@ -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. */