COMMENT @
Copyright (C) 2017-2025 Intel Corporation
SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause
@
;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; ;;; Intel Processor Trace Marker Functionality
;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
.686p
.xmm
.model FLAT
_TEXT segment
public ___itt_pt_mark
public ___itt_pt_event
public ___itt_pt_mark_event
public ___itt_pt_mark_threshold
public ___itt_pt_write
public ___itt_pt_byte
align 10h
;;; void __itt_pt_mark(unsigned char index);
___itt_pt_mark proc near
movzx eax,byte ptr [esp + 4]
lea eax,__itt_pt_mark_call_table[eax * 4]
jmp eax
align 04h
dd 0, 1, 2, 3 ;;; GUID
dd 0fadefadeh ;;; magic marker
__itt_pt_mark_call_table:
dd 256 dup(0000c2c3h OR (( $ - offset __itt_pt_mark_call_table) SHL 14))
___itt_pt_mark endp
___itt_pt_byte proc near
mov ecx,[esp + 4]
___itt_pt_byte_::
and ecx,0ffh
lea ecx,__itt_pt_byte_call_table[ecx]
jmp ecx
align 04h
dd 0, 1, 2, 3 ;;; GUID
dd 0fadedeafh ;;; magic marker
__itt_pt_byte_call_table:
db 256 dup(0c3h)
___itt_pt_byte endp
align 10h
___itt_pt_event proc near
push ecx
mov ecx,[esp + 8]
rdpmc
mov cl,al
call ___itt_pt_byte_
mov cl,ah
call ___itt_pt_byte_
shr eax,16
mov cl,al
call ___itt_pt_byte_
mov cl,ah
call ___itt_pt_byte_
mov cl,dl
call ___itt_pt_byte_
mov cl,dh
call ___itt_pt_byte_
shr edx,16
mov cl,dl
call ___itt_pt_byte_
mov cl,dh
call ___itt_pt_byte_
pop ecx
ret
___itt_pt_event endp
align 10h
___itt_pt_mark_event proc near
test byte ptr [esp + 4],1
jnz odd
push 0
call ___itt_pt_event
add esp,4
jmp ___itt_pt_mark
odd:
push dword ptr [esp + 4]
call ___itt_pt_mark
add esp,4
mov dword ptr [esp + 4],0
jmp ___itt_pt_event
___itt_pt_mark_event endp
align 10h
___itt_pt_flush proc near
lea eax,offset __itt_pt_mark_flush_1
jmp eax
align 10h
nop
__itt_pt_mark_flush_1:
lea eax,offset __itt_pt_mark_flush_2
jmp eax
align 10h
nop
nop
__itt_pt_mark_flush_2:
lea eax,offset __itt_pt_mark_flush_3
jmp eax
align 10h
nop
nop
nop
__itt_pt_mark_flush_3:
ret
___itt_pt_flush endp
align 10h
;;; int __itt_pt_mark_threshold(unsigned char index, unsigned long long* tmp, int threshold);
___itt_pt_mark_threshold proc near
test byte ptr [esp + 4],1 ;;; index
jnz mark_end
mark_begin:
mov ecx,(1 SHL 30) + 1
rdpmc
mov ecx,[esp + 8] ;;; tmp
mov [ecx + 0],eax
mov [ecx + 4],edx
jmp ___itt_pt_mark
mark_end:
mov ecx,(1 SHL 30) + 1
rdpmc
mov ecx,[esp + 8] ;;; tmp
sub eax,[ecx + 0]
sbb edx,[ecx + 4]
or edx,edx
jnz found
cmp edx,[esp + 12] ;;; threshold
jnc found
jmp ___itt_pt_mark
found:
call ___itt_pt_mark
jmp ___itt_pt_flush
___itt_pt_mark_threshold endp
;;; PTWRITE
align 10h
;;; void __itt_pt_write(unsigned long long value);
dd 0, 1, 2, 3 ;;; GUID
___itt_pt_write proc
;;; ptwrite dword ptr [esp + 4]
db 0F3h, 0Fh, 0AEh, 64h, 24h, 04h
ret
___itt_pt_write endp
;;;
_TEXT ends
end