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Bug 1018477: Fix R/M check in x86 detour code. r=m_kato

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This commit is contained in:
David Major 2014-06-03 16:47:43 +12:00
parent d27a15d1c7
commit 182619548e
1 changed files with 8 additions and 3 deletions
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11
xpcom/build/nsWindowsDllInterceptor.h
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@ -355,9 +355,14 @@ protected:
{
// REG=r, R/M=r or REG=r, R/M=[r]
nBytes += 2;
} else if (((b & 0xc0) == 0x40) && ((b & 0x38) != 0x20)) {
// REG=r, R/M=[r + disp8]
nBytes += 3;
} else if ((b & 0xc0) == 0x40) {
if ((b & 0x07) == 0x04) {
// REG=r, R/M=[SIB + disp8]
nBytes += 4;
} else {
// REG=r, R/M=[r + disp8]
nBytes += 3;
}
} else {
// complex MOV, bail
return;