kolibrios-gitea/drivers/examples/asm_drv/asm_drv.asm

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NASM
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format PE DLL native
entry START
__DEBUG__ = 1
__DEBUG_LEVEL__ = 2
section '.flat' readable writable executable
include '../../proc32.inc'
include '../../struct.inc'
include '../../macros.inc'
include '../../fdo.inc'
proc START c, reason:dword
DEBUGF 2,"Loading 'asm_drv' driver\n"
cmp [reason], DRV_ENTRY
jne .fail
invoke RegService, my_service, service_proc
ret
.fail:
xor eax, eax
ret
endp
proc service_proc stdcall, ioctl:dword
mov ebx, [ioctl]
mov eax, [ebx + IOCTL.io_code]
cmp eax, 0 ; FUNCTION ADD(a+b);
jne .fail
mov eax, [ebx + IOCTL.input]
mov ecx, eax
add ecx, 4
mov eax, [eax]
add eax, [ecx]
mov ecx, [ebx + IOCTL.output]
mov [ecx], eax
xor eax, eax
ret
.fail:
or eax, -1
ret
endp
data fixups
end data
include '../../peimport.inc'
my_service db 'asm_drv',0 ; max 16 chars include zero
include_debug_strings