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OcAppleKernelLib: Fix CFG lock patch for SNB

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This commit is contained in:
vit9696 2020-08-23 22:03:09 +03:00
parent 28884d1456
commit ee7aaa37e1
1 changed files with 19 additions and 11 deletions
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30
Library/OcAppleKernelLib/CommonPatches.c
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@ -69,7 +69,7 @@ PatchAppleCpuPmCfgLock (
&& Walker[3] == mMovEcxE2[3]
&& Walker[4] == mMovEcxE2[4]) {
STATIC_ASSERT (sizeof (mMovEcxE2) == 5, "Unsupported mMovEcxE2");
Walker += sizeof (mMovCxE2);
Walker += sizeof (mMovEcxE2);
} else if (Walker[0] == mMovCxE2[0]
&& Walker[1] == mMovCxE2[1]
&& Walker[2] == mMovCxE2[2]
@ -94,21 +94,29 @@ PatchAppleCpuPmCfgLock (
*Walker++ = 0x90;
*Walker++ = 0x90;
break;
} else if ((Walker[0] == 0xC9 && Walker[1] == 0xC3) ///< leave; ret
|| (Walker[0] == 0x5D && Walker[1] == 0xC3) ///< pop rbp; ret
|| (Walker[0] == 0xB9 && Walker[3] == 0 && Walker[4] == 0) ///< mov ecx, 00000xxxxh
|| (Walker[0] == 0x66 && Walker[1] == 0xB9 && Walker[3] == 0)) { ///< mov cx, 00xxh
}
if ((Walker[0] == 0xC9 && Walker[1] == 0xC3) ///< leave; ret
|| (Walker[0] == 0x5D && Walker[1] == 0xC3)) { ///< pop rbp; ret
//
// Stop searching upon matching return and reassign sequences.
// Stop searching upon matching return sequences.
//
Walker += 2;
break;
} else {
//
// Continue searching.
//
++Walker;
}
if ((Walker[0] == 0xB9 && Walker[3] == 0 && Walker[4] == 0) ///< mov ecx, 00000xxxxh
|| (Walker[0] == 0x66 && Walker[1] == 0xB9 && Walker[3] == 0)) { ///< mov cx, 00xxh
//
// Stop searching upon matching reassign sequences.
//
break;
}
//
// Continue searching.
//
++Walker;
}
}