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gdbstub: Update x86 control register bits

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The control register bits haven't been updated in a few years, making
them lack behind features QEMU ganied in these years.

Update them to the current version of the SDM and sort the 32bit version
to be in line with all the other definitions (descending order).

This should remove confusion when debugging, for example, CET-enabled
guests:

- before the change:
  (gdb) info registers cr4
  cr4            0x8000f0            [ PGE MCE PAE PSE ]

- after the change:
  (gdb) info registers cr4
  cr4            0x8000f0            [ CET PGE MCE PAE PSE ]

Signed-off-by: Mathias Krause <minipli@grsecurity.net>
Link: https://lore.kernel.org/r/20260327143413.254227-1-minipli@grsecurity.net
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Mathias Krause
2026-03-27 15:34:13 +01:00
committed by Paolo Bonzini
parent b3126dc77d
commit 88d39a2937
2 changed files with 34 additions and 20 deletions
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47
gdbstub/gdb-xml/i386-32bit.xml
View File

@@ -87,27 +87,34 @@
</flags>
<flags id="i386_cr4" size="4">
<field name="VME" start="0" end="0"/>
<field name="PVI" start="1" end="1"/>
<field name="TSD" start="2" end="2"/>
<field name="DE" start="3" end="3"/>
<field name="PSE" start="4" end="4"/>
<field name="PAE" start="5" end="5"/>
<field name="MCE" start="6" end="6"/>
<field name="PGE" start="7" end="7"/>
<field name="PCE" start="8" end="8"/>
<field name="OSFXSR" start="9" end="9"/>
<field name="OSXMMEXCPT" start="10" end="10"/>
<field name="UMIP" start="11" end="11"/>
<field name="LA57" start="12" end="12"/>
<field name="VMXE" start="13" end="13"/>
<field name="SMXE" start="14" end="14"/>
<field name="FSGSBASE" start="16" end="16"/>
<field name="PCIDE" start="17" end="17"/>
<field name="OSXSAVE" start="18" end="18"/>
<field name="SMEP" start="20" end="20"/>
<field name="SMAP" start="21" end="21"/>
<field name="LAM_SUP" start="28" end="28"/>
<field name="LASS" start="27" end="27"/>
<field name="UINTR" start="25" end="25"/>
<field name="PKS" start="24" end="24"/>
<field name="CET" start="23" end="23"/>
<field name="PKE" start="22" end="22"/>
<field name="PKE" start="22" end="22"/>
<field name="SMAP" start="21" end="21"/>
<field name="SMEP" start="20" end="20"/>
<field name="KL" start="19" end="19"/>
<field name="OSXSAVE" start="18" end="18"/>
<field name="PCIDE" start="17" end="17"/>
<field name="FSGSBASE" start="16" end="16"/>
<field name="SMXE" start="14" end="14"/>
<field name="VMXE" start="13" end="13"/>
<field name="LA57" start="12" end="12"/>
<field name="UMIP" start="11" end="11"/>
<field name="OSXMMEXCPT" start="10" end="10"/>
<field name="OSFXSR" start="9" end="9"/>
<field name="PCE" start="8" end="8"/>
<field name="PGE" start="7" end="7"/>
<field name="MCE" start="6" end="6"/>
<field name="PAE" start="5" end="5"/>
<field name="PSE" start="4" end="4"/>
<field name="DE" start="3" end="3"/>
<field name="TSD" start="2" end="2"/>
<field name="PVI" start="1" end="1"/>
<field name="VME" start="0" end="0"/>
</flags>
<flags id="i386_efer" size="4">

7
gdbstub/gdb-xml/i386-64bit.xml
View File

@@ -102,9 +102,16 @@
</flags>
<flags id="x64_cr4" size="8">
<field name="FRED" start="32" end="32"/>
<field name="LAM_SUP" start="28" end="28"/>
<field name="LASS" start="27" end="27"/>
<field name="UINTR" start="25" end="25"/>
<field name="PKS" start="24" end="24"/>
<field name="CET" start="23" end="23"/>
<field name="PKE" start="22" end="22"/>
<field name="SMAP" start="21" end="21"/>
<field name="SMEP" start="20" end="20"/>
<field name="KL" start="19" end="19"/>
<field name="OSXSAVE" start="18" end="18"/>
<field name="PCIDE" start="17" end="17"/>
<field name="FSGSBASE" start="16" end="16"/>