mirror of
https://github.com/reactos/reactos.git
synced 2024-11-03 21:34:00 +00:00
66 lines
1.4 KiB
ArmAsm
66 lines
1.4 KiB
ArmAsm
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS Kernel
|
|
* FILE: ntoskrnl/rtl/i386/stack.S
|
|
* PURPOSE: Stack Support for RTL
|
|
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
|
|
*/
|
|
|
|
/* INCLUDES ******************************************************************/
|
|
|
|
#include <asm.inc>
|
|
#include <ks386.inc>
|
|
|
|
EXTERN _KePrefetchNTAGranularity:DWORD
|
|
|
|
/* FUNCTIONS *****************************************************************/
|
|
.code
|
|
|
|
PUBLIC _RtlpGetStackLimits@8
|
|
_RtlpGetStackLimits@8:
|
|
|
|
/* Get the current thread */
|
|
mov eax, [fs:KPCR_CURRENT_THREAD]
|
|
|
|
/* Get the stack limits */
|
|
mov ecx, [eax+KTHREAD_STACK_LIMIT]
|
|
mov edx, [eax+KTHREAD_INITIAL_STACK]
|
|
sub edx, SIZEOF_FX_SAVE_AREA
|
|
|
|
/* Return them */
|
|
mov eax, [esp+4]
|
|
mov [eax], ecx
|
|
|
|
mov eax, [esp+8]
|
|
mov [eax], edx
|
|
|
|
/* return */
|
|
ret 8
|
|
|
|
|
|
PUBLIC @RtlPrefetchMemoryNonTemporal@8
|
|
@RtlPrefetchMemoryNonTemporal@8:
|
|
|
|
/*
|
|
* Kernel will overwrite this to 'nop' during init
|
|
* if prefetchnta is available. Slight optimization
|
|
* as compared to checking KeI386XMMIPresent for every call.
|
|
*/
|
|
ret
|
|
|
|
/* Get granularity */
|
|
mov eax, [_KePrefetchNTAGranularity]
|
|
|
|
/* Prefetch this line */
|
|
FetchLine:
|
|
prefetchnta byte ptr [ecx]
|
|
|
|
/* Update address and count */
|
|
add ecx, eax
|
|
sub edx, eax
|
|
|
|
/* Keep looping for the next line, or return if done */
|
|
ja FetchLine
|
|
ret
|
|
|
|
END
|