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i386: expand down ring 0 stack (nw)

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This commit is contained in:
cracyc 2014-10-07 03:35:58 +00:00
parent 239c35473a
commit de9d763b0a
1 changed files with 2 additions and 2 deletions
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4
src/emu/cpu/i386/i386.c
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@ -901,7 +901,7 @@ void i386_device::i386_trap(int irq, int irq_gate, int trap_level)
newESP = i386_get_stack_ptr(DPL);
if(type & 0x08) // 32-bit gate
{
if(newESP < (V8086_MODE?36:20))
if(((newESP < (V8086_MODE?36:20)) && !(stack.flags & 0x4)) || ((~stack.limit < (~(newESP - 1) + (V8086_MODE?36:20))) && (stack.flags & 0x4)))
{
logerror("IRQ: New stack has no space for return addresses.\n");
FAULT_EXP(FAULT_SS,0)
@ -910,7 +910,7 @@ void i386_device::i386_trap(int irq, int irq_gate, int trap_level)
else // 16-bit gate
{
newESP &= 0xffff;
if(newESP < (V8086_MODE?18:10))
if(((newESP < (V8086_MODE?18:10)) && !(stack.flags & 0x4)) || ((~stack.limit < (~(newESP - 1) + (V8086_MODE?18:10))) && (stack.flags & 0x4)))
{
logerror("IRQ: New stack has no space for return addresses.\n");
FAULT_EXP(FAULT_SS,0)