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[SOFT386]

Browse source 
Fix prefix handling.


svn path=/branches/ntvdm/; revision=60260
This commit is contained in:
Aleksandar Andrejevic 2013-09-21 02:18:41 +00:00
parent 9d7137b757
commit 6a2d76ab68
1 changed files with 51 additions and 44 deletions
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95
lib/soft386/opcodes.c
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@ -1425,18 +1425,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeAddEax)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x05);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;
@ -1695,18 +1696,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeOrEax)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x0D);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;
@ -1925,9 +1927,9 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeAndAl)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x24);
if (State->PrefixFlags)
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* This opcode doesn't take any prefixes */
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
@ -1961,18 +1963,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeAndEax)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x25);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;
@ -2227,18 +2230,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeXorEax)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x35);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;
@ -2478,18 +2482,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeTestEax)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0xA9);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;
@ -2965,18 +2970,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeAdcEax)
/* Make sure this is the right instruction */
ASSERT(Opcode == 0x15);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;
@ -3418,18 +3424,19 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeCmpSubEax)
/* Make sure this is the right instruction */
ASSERT((Opcode & 0xEF) == 0x2D);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else
if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
if (Size)
{
ULONG FirstValue = State->GeneralRegs[SOFT386_REG_EAX].Long;