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Change DPL in trap gate for INT 3 to 3, so INT 3 can be used from user mode

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svn path=/trunk/; revision=4548
This commit is contained in:
Gé van Geldorp 2003-04-18 09:09:56 +00:00
parent ff17fbcf89
commit 63401fccd2
1 changed files with 20 additions and 19 deletions
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39
reactos/ntoskrnl/ke/i386/exp.c
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@ -589,12 +589,13 @@ static void set_interrupt_gate(unsigned int sel, unsigned int func)
KiIdt[sel].b = 0x8e00 + (((int)func)&0xffff0000);
}
static void set_trap_gate(unsigned int sel, unsigned int func)
static void set_trap_gate(unsigned int sel, unsigned int func, unsigned int dpl)
{
DPRINT("set_trap_gate(sel %d, func %x)\n",sel,func);
DPRINT("set_trap_gate(sel %d, func %x, dpl %d)\n",sel, func, dpl);
assert(dpl <= 3);
KiIdt[sel].a = (((int)func)&0xffff) +
(KERNEL_CS << 16);
KiIdt[sel].b = 0x8f00 + (((int)func)&0xffff0000);
KiIdt[sel].b = 0x8f00 + (dpl << 13) + (((int)func)&0xffff0000);
}
static void
@ -617,27 +618,27 @@ KeInitExceptions(VOID)
/*
* Set up the other gates
*/
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_trap_gate(0, (ULONG)KiTrap0, 0);
set_trap_gate(1, (ULONG)KiTrap1, 0);
set_trap_gate(2, (ULONG)KiTrap2, 0);
set_trap_gate(3, (ULONG)KiTrap3, 3);
set_trap_gate(4, (ULONG)KiTrap4, 0);
set_trap_gate(5, (ULONG)KiTrap5, 0);
set_trap_gate(6, (ULONG)KiTrap6, 0);
set_trap_gate(7, (ULONG)KiTrap7, 0);
set_task_gate(8, TRAP_TSS_SELECTOR);
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(9, (ULONG)KiTrap9, 0);
set_trap_gate(10, (ULONG)KiTrap10, 0);
set_trap_gate(11, (ULONG)KiTrap11, 0);
set_trap_gate(12, (ULONG)KiTrap12, 0);
set_trap_gate(13, (ULONG)KiTrap13, 0);
set_interrupt_gate(14, (ULONG)KiTrap14);
set_trap_gate(15, (ULONG)KiTrap15);
set_trap_gate(16, (ULONG)KiTrap16);
set_trap_gate(15, (ULONG)KiTrap15, 0);
set_trap_gate(16, (ULONG)KiTrap16, 0);
for (i=17;i<256;i++)
{
set_trap_gate(i,(int)KiTrapUnknown);
set_trap_gate(i,(int)KiTrapUnknown, 0);
}
set_system_call_gate(0x2d,(int)interrupt_handler2d);