; $Id: bootsector2-cpu-xcpt-2-template.mac $
;; @file
; Bootsector test for debug exceptions - multi mode template.
;

;
; Copyright (C) 2007-2022 Oracle and/or its affiliates.
;
; This file is part of VirtualBox base platform packages, as
; available from https://www.virtualbox.org.
;
; This program is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; as published by the Free Software Foundation, in version 3 of the
; License.
;
; This program is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
; General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, see <https://www.gnu.org/licenses>.
;
; The contents of this file may alternatively be used under the terms
; of the Common Development and Distribution License Version 1.0
; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
; in the VirtualBox distribution, in which case the provisions of the
; CDDL are applicable instead of those of the GPL.
;
; You may elect to license modified versions of this file under the
; terms and conditions of either the GPL or the CDDL or both.
;
; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
;


%include "bootsector2-template-header.mac"


;*******************************************************************************
;*  Defined Constants And Macros                                               *
;*******************************************************************************
;;
; Some 32/64 macros.
;
%if TMPL_BITS == 32
 %define bs2Idt_BP      bs2Idt32bit_BP
 %define MY_R0_CS       BS2_SEL_CS32
 %define MY_R1_CS       BS2_SEL_R1_CS32
 %define MY_R2_CS       BS2_SEL_R2_CS32
 %define MY_R3_CS       BS2_SEL_R3_CS32

 %define MY_R0_DS       BS2_SEL_DS32
 %define MY_R1_DS       BS2_SEL_R1_DS32
 %define MY_R2_DS       BS2_SEL_R2_DS32
 %define MY_R3_DS       BS2_SEL_R3_DS32

 %define MY_R0_SS       BS2_SEL_SS32
 %define MY_R1_SS       BS2_SEL_R1_SS32
 %define MY_R2_SS       BS2_SEL_R2_SS32
 %define MY_R3_SS       BS2_SEL_R3_SS32

%else
 %define bs2Idt_BP      bs2Idt64bit_BP
 %define MY_R0_CS       BS2_SEL_CS64
 %define MY_R1_CS       BS2_SEL_R1_CS64
 %define MY_R2_CS       BS2_SEL_R2_CS64
 %define MY_R3_CS       BS2_SEL_R3_CS64

 %define MY_R0_DS       BS2_SEL_DS64
 %define MY_R1_DS       BS2_SEL_R1_DS64
 %define MY_R2_DS       BS2_SEL_R2_DS64
 %define MY_R3_DS       BS2_SEL_R3_DS64

 %define MY_R0_SS       BS2_SEL_SS64
 %define MY_R1_SS       BS2_SEL_R1_SS64
 %define MY_R2_SS       BS2_SEL_R2_SS64
 %define MY_R3_SS       BS2_SEL_R3_SS64
%endif

%ifdef TMPL_64BIT
 %assign MY_IS_64BIT 1
%else
 %assign MY_IS_64BIT 0
%endif

;; Uncomment this to do lots more iterations (takes time!).
%define QUICK_TEST


;*******************************************************************************
;*      Global Variables                                                       *
;*******************************************************************************
%ifndef CPU_XCPT_1_GLOBALS
 %define CPU_XCPT_1_GLOBALS

;;
; Asserts a test.
;
; @param    %1  First cmp operand.
; @param    %2  First cmp operand.
; @param    %3  Which kind of conditional jump to make
; @param    %4  The message to print (format string, no arguments please).
;
 %macro ASSERT_SIMPLE 4
        cmp     %1, %2
        %3      %%.ok
        cli                             ; raw-mode hack
        push    dword __LINE__
  %ifdef TMPL_16BIT
        push    ds
  %endif
        push    %%.s_szMsg
        call    TMPL_NM_CMN(TestFailedF)
        add     xSP, sCB*2
        ;hlt
        sti
        jmp     %%.ok
 %%.s_szMsg: db %4, " (0x%RX32)", 0
 %%.ok:
 %endmacro

%endif


;;
; Disable the breakpoints as well as check RA1 bits.
;
; @changes DRx
;
BEGINPROC TMPL_NM(DisableBps)
        push    sAX
        push    sBX
        sPUSHF

        xor     eax, eax
        mov     dr7, sAX
        mov     dr6, sAX
        mov     dr0, sAX
        mov     dr1, sAX
        mov     dr2, sAX
        mov     dr3, sAX

        mov     sAX, dr6
        mov     ebx, X86_DR6_RA1_MASK
        ASSERT_SIMPLE sAX, xBX, je, "Wrong DR6 value (RA1)."
        mov     sAX, dr7
        mov     ebx, X86_DR7_RA1_MASK
        ASSERT_SIMPLE sAX, sBX, je, "Wrong DR7 value (RA1)."

        sPOPF
        pop     sBX
        pop     sAX
        ret
ENDPROC   TMPL_NM(DisableBps)


;;
; Checks different gate types.
;
BEGINPROC TMPL_NM(TestStepping)
        push    xBP
        mov     xBP, xSP
        push    sAX
        push    xBX
        push    xCX
        push    xDX
        push    xDI
        push    xSI

        mov     xAX, .s_szSubTestName
        call    TMPL_NM_CMN(TestSub)


        ;
        ; Step one instruction a lot of times to catch DR6 mismanagement.
        ;
%ifdef QUICK_TEST
        mov     ecx, 0x1000
%else
        mov     ecx, 0x80000
%endif
.the_1st_loop:

        mov     eax, X86_DR6_INIT_VAL
        mov     dr6, sAX
        mov     eax, 0x12345678
        mov     ebx, 0xaabbccdd
        sPUSHF
        or      word [xSP], X86_EFL_TF
        sPOPF
        xchg ebx, eax
        BS2_TRAP_INSTR X86_XCPT_DB, 0, nop
        ASSERT_SIMPLE eax, 0xaabbccdd, je, "xchg wasn't executed (eax)."
        ASSERT_SIMPLE ebx, 0x12345678, je, "xchg wasn't executed (ebx)."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_BS), je, "Wrong DR6 value."

        dec     ecx
        jnz     .the_1st_loop

        ;
        ; Check that certain bits in DR6 is preserved and others not.
        ;
%ifdef QUICK_TEST
        mov     ecx, 0x200
%else
        mov     ecx, 0x20000
%endif
.the_2nd_loop:
        mov     eax, X86_DR6_INIT_VAL | X86_DR6_B0 | X86_DR6_B1 | X86_DR6_B2 | X86_DR6_B3 | X86_DR6_BT | X86_DR6_BD
        mov     dr6, sAX
        mov     eax, 0x12345678
        mov     ebx, 0xaabbccdd
        sPUSHF
        or      word [xSP], X86_EFL_TF
        sPOPF
        xchg ebx, eax
        BS2_TRAP_INSTR X86_XCPT_DB, 0, nop
        ASSERT_SIMPLE eax, 0xaabbccdd, je, "xchg wasn't executed (eax)."
        ASSERT_SIMPLE ebx, 0x12345678, je, "xchg wasn't executed (ebx)."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_BS | X86_DR6_INIT_VAL | X86_DR6_BT | X86_DR6_BD), je, "Wrong DR6 value."

        dec     ecx
        jnz     .the_2nd_loop

        ;
        ; Done.
        ;
        cli                             ; raw-mode hack
        call    TMPL_NM_CMN(TestSubDone)
        sti

        pop     xSI
        pop     xDI
        pop     xDX
        pop     xCX
        pop     xBX
        pop     sAX
        leave
        ret

.s_szSubTestName:
        db      TMPL_MODE_STR, ', EFLAGS.TF stepping', 0
ENDPROC   TMPL_NM(TestGateType)


;;
; Check execution breakpoint.
;
BEGINPROC TMPL_NM(TestBpExec)
        push    xBP
        mov     xBP, xSP
        push    sAX
        push    xBX
        push    xCX
        push    xDX
        push    xDI
        push    xSI

        mov     xAX, .s_szSubTestName
        call    TMPL_NM_CMN(TestSub)


        ;
        ; Arm all 4 breakpoints and check DR6 management.
        ;
%ifdef QUICK_TEST
        mov     ecx, 0x1000
%else
        mov     ecx, 0x80000
%endif
        lea     sAX, [.bp_dr0 xWrtRIP]
        mov     dr0, sAX
        lea     sAX, [.bp_dr1 xWrtRIP]
        mov     dr1, sAX
        lea     sAX, [.bp_dr2 xWrtRIP]
        mov     dr2, sAX
        lea     sAX, [.bp_dr3 xWrtRIP]
        mov     dr3, sAX
        mov     eax, X86_DR7_RA1_MASK | X86_DR7_G0 | X86_DR7_G1 | X86_DR7_G2 | X86_DR7_G3 | X86_DR7_GE
        mov     dr7, sAX

.the_loop:
        mov     eax, X86_DR6_INIT_VAL | X86_DR6_BS | X86_DR6_BT | X86_DR6_BD
        mov     dr6, sAX

        mov     eax, 0x12345678
        mov     ebx, 0xaabbccdd
.bp_dr0:
        BS2_TRAP_INSTR X86_XCPT_DB, 0, xchg ebx, eax
        ASSERT_SIMPLE eax, 0x12345678, je, "xchg was executed (eax)."
        ASSERT_SIMPLE ebx, 0xaabbccdd, je, "xchg was executed (ebx)."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_BS | X86_DR6_BT | X86_DR6_BD | X86_DR6_B0), je, "Wrong DR6 value (dr0)."

        mov     eax, 0x12345678
        mov     ebx, 0xaabbccdd
.bp_dr1:
        BS2_TRAP_INSTR X86_XCPT_DB, 0, xchg ebx, eax
        ASSERT_SIMPLE eax, 0x12345678, je, "xchg was executed (eax)."
        ASSERT_SIMPLE ebx, 0xaabbccdd, je, "xchg was executed (ebx)."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_BS | X86_DR6_BT | X86_DR6_BD | X86_DR6_B1), je, "Wrong DR6 value (dr1)."

        mov     eax, 0x12345678
        mov     ebx, 0xaabbccdd
.bp_dr2:
        BS2_TRAP_INSTR X86_XCPT_DB, 0, xchg ebx, eax
        ASSERT_SIMPLE eax, 0x12345678, je, "xchg was executed (eax)."
        ASSERT_SIMPLE ebx, 0xaabbccdd, je, "xchg was executed (ebx)."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_BS | X86_DR6_BT | X86_DR6_BD | X86_DR6_B2), je, "Wrong DR6 value (dr2)."

        mov     eax, 0x12345678
        mov     ebx, 0xaabbccdd
.bp_dr3:
        BS2_TRAP_INSTR X86_XCPT_DB, 0, xchg ebx, eax
        ASSERT_SIMPLE eax, 0x12345678, je, "xchg was executed (eax)."
        ASSERT_SIMPLE ebx, 0xaabbccdd, je, "xchg was executed (ebx)."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_BS | X86_DR6_BT | X86_DR6_BD | X86_DR6_B3), je, "Wrong DR6 value (dr3)."

        dec     ecx
        jnz     .the_loop

        ;
        ; Touch the code, making sure the BPs don't trigger on data access.
        ;
        mov     al, [.bp_dr0 xWrtRIP]
        mov     [.bp_dr0 xWrtRIP], al
        mov     al, [.bp_dr1 xWrtRIP]
        mov     [.bp_dr1 xWrtRIP], al
        mov     al, [.bp_dr2 xWrtRIP]
        mov     [.bp_dr2 xWrtRIP], al
        mov     al, [.bp_dr3 xWrtRIP]
        mov     [.bp_dr3 xWrtRIP], al

        ;
        ; Done.
        ;
        call    TMPL_NM(DisableBps)
        cli                             ; raw-mode hack
        call    TMPL_NM_CMN(TestSubDone)
        sti

        pop     xSI
        pop     xDI
        pop     xDX
        pop     xCX
        pop     xBX
        pop     sAX
        leave
        ret

.s_szSubTestName:
        db      TMPL_MODE_STR, ', Exec BP', 0
ENDPROC   TMPL_NM(TestBpExec)


;;
; Check I/O breakpoints.
;
BEGINPROC TMPL_NM(TestBpIo)
        push    xBP
        mov     xBP, xSP
        push    sAX
        push    xBX
        push    xCX
        push    xDX
        push    xDI
        push    xSI

        mov     xAX, .s_szSubTestName
        call    TMPL_NM_CMN(TestSub)


        ;
        ; Arm all 4 breakpoints and check range handling and such.
        ;
        mov     sAX, cr4
        or      sAX, X86_CR4_DE
        mov     cr4, sAX

%ifdef QUICK_TEST
        mov     ecx, 1000
%else
        mov     ecx, 4096
%endif
        mov     sAX, 84h
        mov     dr0, sAX
        mov     sAX, 85h
        mov     dr1, sAX
        mov     sAX, 86h
        mov     dr2, sAX
        mov     sAX, 8ch
        mov     dr3, sAX
        mov     eax, X86_DR7_RA1_MASK | X86_DR7_LE | X86_DR7_GE \
                   | X86_DR7_L0 | X86_DR7_G0 | X86_DR7_RW(0, X86_DR7_RW_IO) | X86_DR7_LEN(0, X86_DR7_LEN_BYTE) \
                   | X86_DR7_L1 | X86_DR7_G1 | X86_DR7_RW(1, X86_DR7_RW_IO) | X86_DR7_LEN(1, X86_DR7_LEN_WORD) \
                   | X86_DR7_L2 | X86_DR7_G2 | X86_DR7_RW(2, X86_DR7_RW_IO) | X86_DR7_LEN(2, X86_DR7_LEN_DWORD) \
                   | X86_DR7_L3 | X86_DR7_G3 | X86_DR7_RW(3, X86_DR7_RW_IO) | X86_DR7_LEN(3, X86_DR7_LEN_DWORD)
        mov     dr7, sAX

.the_loop:
        mov     eax, X86_DR6_INIT_VAL
        mov     dr6, sAX

        mov     eax, 0x12345678
        in eax, 84h
        BS2_TRAP_INSTR X86_XCPT_DB, 0, nop
        ASSERT_SIMPLE eax, 0x12345678, jne, "in was not executed."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_B0), je, "Wrong DR6 value (dr0)."

        mov     ebx, 0x12345678
        in eax, 85h
        BS2_TRAP_INSTR X86_XCPT_DB, 0, nop
        ASSERT_SIMPLE eax, 0x12345678, jne, "in was not executed."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_B1), je, "Wrong DR6 value (dr1)."

        mov     eax, 0x12345678
        in eax, 86h
        BS2_TRAP_INSTR X86_XCPT_DB, 0, nop
        ASSERT_SIMPLE eax, 0x12345678, jne, "in was not executed."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_B2), je, "Wrong DR6 value (dr2)."

        mov     eax, 0x12345678
        in eax, 8ch
        BS2_TRAP_INSTR X86_XCPT_DB, 0, nop
        ASSERT_SIMPLE eax, 0x12345678, jne, "in was not executed."
        mov     sAX, dr6
        ASSERT_SIMPLE eax, (X86_DR6_INIT_VAL | X86_DR6_B3), je, "Wrong DR6 value (dr3)."

        dec     ecx
        jnz     .the_loop

        ;
        ; Done.
        ;
        call    TMPL_NM(DisableBps)
        cli                             ; raw-mode hack
        call    TMPL_NM_CMN(TestSubDone)
        sti

        pop     xSI
        pop     xDI
        pop     xDX
        pop     xCX
        pop     xBX
        pop     sAX
        leave
        ret

.s_szSubTestName:
        db      TMPL_MODE_STR, ', I/O BP', 0
ENDPROC   TMPL_NM(TestBpIo)


;;
; Do the tests for this mode.
;
; @uses nothing
;
BEGINCODELOW
BITS 16
BEGINPROC TMPL_NM(DoTestsForMode_rm)
        push    bp
        mov     bp, sp
        push    ax

        ;
        ; Check if the mode and NX is supported, do the switch.
        ;
        call    TMPL_NM(Bs2IsModeSupported_rm)
        jz      .done
        call    TMPL_NM(Bs2EnterMode_rm)
BITS TMPL_BITS
        pushf
        sti                             ; raw-mode hacks

        ;
        ; Do the testing.
        ;

        call    TMPL_NM(TestStepping)
        call    TMPL_NM(TestBpExec)
        call    TMPL_NM(TestBpIo)

        ;
        ; Back to real mode.
        ;
        popf
        call    TMPL_NM(Bs2ExitMode)
BITS 16
        call    Bs2DisableNX_r86

.done:
        pop     ax
        leave
        ret
ENDPROC TMPL_NM(DoTestsForMode_rm)
TMPL_BEGINCODE
BITS TMPL_BITS

%include "bootsector2-template-footer.mac"