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Change the type for the page fault handler from trap to interrupt gate.

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Enable interrupts on page faults only if the faulting process has interrupts enabled.

svn path=/trunk/; revision=3799
This commit is contained in:
Hartmut Birr 2002-11-27 20:49:54 +00:00
parent d6ec424dbf
commit baf7670d00
1 changed files with 31 additions and 17 deletions
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46
reactos/ntoskrnl/ke/i386/exp.c
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@ -46,6 +46,8 @@
/* GLOBALS *****************************************************************/
#define FLAG_IF (1<<9)
#define _STR(x) #x
#define STR(x) _STR(x)
@ -521,8 +523,11 @@ KiTrapHandler(PKTRAP_FRAME Tf, ULONG ExceptionNr)
* Maybe handle the page fault and return
*/
if (ExceptionNr == 14)
{
if (Tf->Eflags & FLAG_IF)
{
__asm__("sti\n\t");
}
Status = MmPageFault(Tf->Cs&0xffff,
&Tf->Eip,
&Tf->Eax,
@ -576,6 +581,14 @@ static void set_system_call_gate(unsigned int sel, unsigned int func)
static void set_interrupt_gate(unsigned int sel, unsigned int func)
{
DPRINT("set_interrupt_gate(sel %d, func %x)\n",sel,func);
KiIdt[sel].a = (((int)func)&0xffff) +
(KERNEL_CS << 16);
KiIdt[sel].b = 0x8e00 + (((int)func)&0xffff0000);
}
static void set_trap_gate(unsigned int sel, unsigned int func)
{
DPRINT("set_trap_gate(sel %d, func %x)\n",sel,func);
KiIdt[sel].a = (((int)func)&0xffff) +
(KERNEL_CS << 16);
KiIdt[sel].b = 0x8f00 + (((int)func)&0xffff0000);
@ -601,27 +614,28 @@ KeInitExceptions(VOID)
/*
* Set up the other gates
*/
set_interrupt_gate(0, (ULONG)KiTrap0);
set_interrupt_gate(1, (ULONG)KiTrap1);
set_interrupt_gate(2, (ULONG)KiTrap2);
set_interrupt_gate(3, (ULONG)KiTrap3);
set_interrupt_gate(4, (ULONG)KiTrap4);
set_interrupt_gate(5, (ULONG)KiTrap5);
set_interrupt_gate(6, (ULONG)KiTrap6);
set_interrupt_gate(7, (ULONG)KiTrap7);
set_trap_gate(0, (ULONG)KiTrap0);
set_trap_gate(1, (ULONG)KiTrap1);
set_trap_gate(2, (ULONG)KiTrap2);
set_trap_gate(3, (ULONG)KiTrap3);
set_trap_gate(4, (ULONG)KiTrap4);
set_trap_gate(5, (ULONG)KiTrap5);
set_trap_gate(6, (ULONG)KiTrap6);
set_trap_gate(7, (ULONG)KiTrap7);
set_task_gate(8, TRAP_TSS_SELECTOR);
set_interrupt_gate(9, (ULONG)KiTrap9);
set_interrupt_gate(10, (ULONG)KiTrap10);
set_interrupt_gate(11, (ULONG)KiTrap11);
set_interrupt_gate(12, (ULONG)KiTrap12);
set_interrupt_gate(13, (ULONG)KiTrap13);
set_trap_gate(9, (ULONG)KiTrap9);
set_trap_gate(10, (ULONG)KiTrap10);
set_trap_gate(11, (ULONG)KiTrap11);
set_trap_gate(12, (ULONG)KiTrap12);
set_trap_gate(13, (ULONG)KiTrap13);
set_trap_gate(14, (ULONG)KiTrap14);
set_interrupt_gate(14, (ULONG)KiTrap14);
set_interrupt_gate(15, (ULONG)KiTrap15);
set_interrupt_gate(16, (ULONG)KiTrap16);
set_trap_gate(15, (ULONG)KiTrap15);
set_trap_gate(16, (ULONG)KiTrap16);
for (i=17;i<256;i++)
{
set_interrupt_gate(i,(int)KiTrapUnknown);
set_trap_gate(i,(int)KiTrapUnknown);
}
set_system_call_gate(0x2d,(int)interrupt_handler2d);