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Make FPU emulation use CS:IP when determining location of calling

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software interrupt.
This commit is contained in:
Jukka Heinonen 2003-08-20 18:17:39 +00:00 committed by Alexandre Julliard
parent 37925eaf7b
commit fbbe6a43aa
1 changed files with 4 additions and 4 deletions
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8
dlls/winedos/fpu.c
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@ -222,8 +222,7 @@ void WINAPI DOSVM_Int3eHandler(CONTEXT86 *context)
*/
static void FPU_ModifyCode(CONTEXT86 *context, BYTE Opcode)
{
WORD *stack = CTX_SEG_OFF_TO_LIN(context, context->SegSs, context->Esp);
BYTE *code = CTX_SEG_OFF_TO_LIN(context, stack[1], stack[0]);
BYTE *code = CTX_SEG_OFF_TO_LIN(context, context->SegCs, context->Eip);
/*
* All *NIX systems should have a real or kernel emulated FPU.
@ -232,9 +231,10 @@ static void FPU_ModifyCode(CONTEXT86 *context, BYTE Opcode)
code[-2] = 0x9b; /* The fwait instruction */
code[-1] = Opcode; /* Insert the opcode */
if ( stack[0] < 2 ) FIXME("Backed up over a segment boundry in FPU code.\n");
if ( ISV86(context) && LOWORD(context->Eip) < 2 )
FIXME("Backed up over a real mode segment boundary in FPU code.\n");
stack[0] -= 2; /* back up the return address 2 bytes */
context->Eip -= 2; /* back up the return address 2 bytes */
TRACE("Modified code in FPU int call to 0x9b 0x%x\n",Opcode);
}