reactos/ntoskrnl/rtl/i386/stack.S

67 lines
1.4 KiB
ArmAsm
Raw Normal View History

/*
* 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