Intravision/reactos
1
0
Fork 0
mirror of https://github.com/reactos/reactos.git synced 2024-07-22 04:08:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

[SOFT386]

Browse source 
Implement JMP rel16/32


svn path=/branches/ntvdm/; revision=60146
This commit is contained in:
Aleksandar Andrejevic 2013-09-15 18:18:58 +00:00
parent 99dd92ffa0
commit 429d182d64
1 changed files with 46 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

49
lib/soft386/opcodes.c
View file

@ -4212,10 +4212,53 @@ SOFT386_OPCODE_HANDLER(Soft386OpcodeCall)
SOFT386_OPCODE_HANDLER(Soft386OpcodeJmp)
{
// TODO: NOT IMPLEMENTED
UNIMPLEMENTED;
BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
return FALSE;
/* Make sure this is the right instruction */
ASSERT(Opcode == 0xE9);
if (State->PrefixFlags == SOFT386_PREFIX_OPSIZE)
{
/* The OPSIZE prefix toggles the size */
Size = !Size;
}
else if (State->PrefixFlags != 0)
{
/* Invalid prefix */
Soft386Exception(State, SOFT386_EXCEPTION_UD);
return FALSE;
}
if (Size)
{
LONG Offset = 0;
/* Fetch the offset */
if (!Soft386FetchDword(State, (PULONG)&Offset))
{
/* An exception occurred */
return FALSE;
}
/* Move the instruction pointer */
State->InstPtr.Long += Offset;
}
else
{
SHORT Offset = 0;
/* Fetch the offset */
if (!Soft386FetchWord(State, (PUSHORT)&Offset))
{
/* An exception occurred */
return FALSE;
}
/* Move the instruction pointer */
State->InstPtr.LowWord += Offset;
}
return TRUE;
}
SOFT386_OPCODE_HANDLER(Soft386OpcodeJmpAbs)