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Update leave handler to add one less reg if possible

This commit is contained in:
de4dot 2018-09-06 20:57:09 +02:00
parent 236ff788e5
commit 9894cfcc57
1 changed files with 24 additions and 7 deletions
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25
Iced/Intel/InstructionInfoFactory.cs
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@ -1025,7 +1025,6 @@ namespace Iced.Intel {
xsp = GetXSP(instruction.CodeSize, out xspMask);
if ((flags & Flags.NoRegisterUsage) == 0) {
AddRegister(flags, ref usedRegisters, Register.SS, OpAccess.Read);
AddRegister(flags, ref usedRegisters, xsp + 1, OpAccess.Read);
AddRegister(flags, ref usedRegisters, xsp, OpAccess.Write);
}
@ -1033,22 +1032,40 @@ namespace Iced.Intel {
if (code == Code.Leaveq) {
if ((flags & Flags.NoMemoryUsage) == 0)
AddMemory(flags, ref usedMemoryLocations, Register.SS, xsp + 1, Register.None, 1, 0, MemorySize.UInt64, OpAccess.Read);
if ((flags & Flags.NoRegisterUsage) == 0)
if ((flags & Flags.NoRegisterUsage) == 0) {
if (xsp + 1 == Register.RBP)
AddRegister(flags, ref usedRegisters, Register.RBP, OpAccess.ReadWrite);
else {
AddRegister(flags, ref usedRegisters, xsp + 1, OpAccess.Read);
AddRegister(flags, ref usedRegisters, Register.RBP, OpAccess.Write);
}
}
}
else if (code == Code.Leaved) {
if ((flags & Flags.NoMemoryUsage) == 0)
AddMemory(flags, ref usedMemoryLocations, Register.SS, xsp + 1, Register.None, 1, 0, MemorySize.UInt32, OpAccess.Read);
if ((flags & Flags.NoRegisterUsage) == 0)
if ((flags & Flags.NoRegisterUsage) == 0) {
if (xsp + 1 == Register.EBP)
AddRegister(flags, ref usedRegisters, Register.EBP, OpAccess.ReadWrite);
else {
AddRegister(flags, ref usedRegisters, xsp + 1, OpAccess.Read);
AddRegister(flags, ref usedRegisters, Register.EBP, OpAccess.Write);
}
}
}
else {
Debug.Assert(code == Code.Leavew);
if ((flags & Flags.NoMemoryUsage) == 0)
AddMemory(flags, ref usedMemoryLocations, Register.SS, xsp + 1, Register.None, 1, 0, MemorySize.UInt16, OpAccess.Read);
if ((flags & Flags.NoRegisterUsage) == 0)
if ((flags & Flags.NoRegisterUsage) == 0) {
if (xsp + 1 == Register.BP)
AddRegister(flags, ref usedRegisters, Register.BP, OpAccess.ReadWrite);
else {
AddRegister(flags, ref usedRegisters, xsp + 1, OpAccess.Read);
AddRegister(flags, ref usedRegisters, Register.BP, OpAccess.Write);
}
}
}
break;
case CodeInfo.Iret: