There are the interrupt code :
#define BUILD_COMMON_INTERRUPT_HANDLER() \
__asm__( \
"_KiCommonInterrupt:\n\t" \
"cld\n\t" \
"pushl %ds\n\t" \
"pushl %es\n\t" \
"pushl %fs\n\t" \
"pushl %gs\n\t" \
"movl $0xceafbeef,%eax\n\t" \
"pushl %eax\n\t" \
"movl $" STR(KERNEL_DS) ",%eax\n\t" \
"movl %eax,%ds\n\t" \
"movl %eax,%es\n\t" \
"movl %eax,%gs\n\t" \
"movl $" STR(PCR_SELECTOR) ",%eax\n\t" \
"movl %eax,%fs\n\t" \
"pushl %esp\n\t" \
"pushl %ebx\n\t" \
"call _KiInterruptDispatch\n\t" \
"popl %eax\n\t" \
"popl %eax\n\t" \
"popl %eax\n\t" \
"popl %gs\n\t" \
"popl %fs\n\t" \
"popl %es\n\t" \
"popl %ds\n\t" \
"popa\n\t" \
"iret\n\t");
In above code, I will try to change the interrupt chain, as follow.
_declspec(naked)
BuildInterruptHandler()
{
__asm {
pushad
push ds
push es
push fs
push gs
mov eax, 0xceafbeef
push eax
mov ax, KERNEL_DS
mov ds, ax
mov es, ax
mov gs, ax
mov ax, PCR_SELECTOR
mov fs, ax
call InterruptDispatch
mov eax, cs:g_oldornew
cmp eax, 0
jz short rtn_orign
jmp short rtn_new
rtn_orign:
pushad
push ds
push es
push fs
push gs
mov eax, 0x5342beef // I don't know what it means.
push eax
mov ax, KERNEL_DS
mov ds, ax
mov es, ax
mov gs, ax
mov ax, 0x30
mov fs, ax
jmp dword ptr cs:[OldIntHandler]
pop eax
pop gs
pop fs
pop es
pop ds
popad
iretd
rtn_new:
pop eax
pop gs
pop fs
pop es
pop ds
popad
iretd
}
interrupt has possibly int1 - 255.
It branch with a "g_oldornew" variable.
The branch of "rtn_new :" are very well process.
but, branch of "rtn_old" are very bad. it has windbg dump.
dump message :
*** Fatal System Error: 0x0000007f
(0x0000000D,0x00000000,0x00000000,0x00000000)
Break instruction exception - code 80000003 (first chance)
Bugcheck code 0000007F
Arguments 0000000d 00000000 00000000 00000000
ChildEBP RetAddr Args to Child
80471344 8042a9e3 00000003 8047138c 0000000d nt!RtlpBreakWithStatusInstruction
80471374 8042afd6 00000003 8046d630 8046d8c0 nt!KiBugCheckDebugBreak+0x31
80471700 8046846a 0000007f 0000000d 00000000 nt!KeBugCheckEx+0x390
80471700 804656d7 0000007f 0000000d 00000000 nt!KiSystemFatalException+0xe
80471820 00000000 ceafbeef 80460000 00060030 nt!KiExceptionExit+0xab
WARNING: Frame IP not in any known module. Following frames may be wrong.
ffdf001f ffffb490 ffffb4ff 4c014cff 3a004301 0x0
00000000 00000000 00000000 00000000 00000000 0xffffb490
----------
after "jmp dword ptr cs:[OldIntHandler]" processing,
maybe will die?
where can i fix it?
please, advice me
thanks
Code: Select all
). Maybe you could do a call or something. As i'm not very involved with ReactOS 
you are better off making this type of question to the ros-dev mailing list! 