test/src/int-iret-cpl_3.ptt

; Copyright (c) 2014-2019, Intel Corporation
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions are met:
;
;  * Redistributions of source code must retain the above copyright notice,
;    this list of conditions and the following disclaimer.
;  * Redistributions in binary form must reproduce the above copyright notice,
;    this list of conditions and the following disclaimer in the documentation
;    and/or other materials provided with the distribution.
;  * Neither the name of Intel Corporation nor the names of its contributors
;    may be used to endorse or promote products derived from this software
;    without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
; POSSIBILITY OF SUCH DAMAGE.

; Test that an INT followed by an IRET are decoded correctly.
;
; Variant: cpl 0 filtered out
;
;
;           Software interrupts receive FUP(CLIP) + TIP(BLIP?)
;
;           We can not reliably determine whether the FUP/TIP belongs to the
;           software interrupt or to an asynchronous interrupt that was taken
;           before the instruction.
;
;           To distinguish the two cases we would need to read ahead but that
;           may require decoding an unknown amount of code (e.g. in different
;           processes for system-wide ring-3 tracing) until we return either
;           to CLIP if it was an asynchronous interrupt or to NLIP (or even to
;           a later IP) if it wasn't.
;
;           Instead, we assume that it was an asynchronous interrupt.  Tracing
;           appears to get disabled before and re-enabled after the instruction.
;
;           This is wrong most of the time.  But it is predictably wrong and it
;           avoids the case where we incorrectly assume a synchronous transfer
;           and get out of sync.
;

org 0x100000
bits 64
; @pt p1: psb()
; @pt p2: fup(3: %l0)
; @pt p3: mode.exec(64bit)
; @pt p4: psbend()
l0: nop

; @pt p5: fup(1: %l1)
; @pt p6: tip.pgd(0: %l5)

l1: int 42
l2: nop
l3: nop
l4: hlt

l5: nop
l6: iret
l7: hlt

; @pt p7: tip.pge(3: %l2)

; @pt p8: fup(1: %l3)
; @pt p9: tip.pgd(0: %l4)


; @pt .exp(ptdump)
;%0p1  psb
;%0p2  fup        3: %0l0
;%0p3  mode.exec  cs.l
;%0p4  psbend
;%0p5  fup        1: %?l1.2
;%0p6  tip.pgd    0: %?l5.0
;%0p7  tip.pge    3: %?l2
;%0p8  fup        1: %?l3.2
;%0p9  tip.pgd    0: %?l4.0

; @pt .exp(ptxed)
;%0l0 # nop - missing:  l1: int 42
;[disabled]
;[enabled]
;%0l2 # nop
;[disabled]