/*BEGIN_LEGAL 
Intel Open Source License 

Copyright (c) 2002-2014 Intel Corporation. All rights reserved.
 
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
the 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 INTEL OR
ITS 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.
END_LEGAL */
/*
 * Expanded from just testing ret far to include tests for 
 * a number of other instructions with implicit registers
 */
#include <stdio.h>

typedef unsigned long long UINT64;
typedef signed long long INT64;
typedef unsigned int UINT32;
typedef unsigned short UINT16;

extern "C" int FarCallTest();
extern "C" void MaskMovQ(void *dest, UINT64 src, UINT64 mask);
extern "C" void * pushESP(void *stack);
extern "C" void * popESP(void *stack);
extern "C" void * push4ESP(void *stack);
extern "C" void * pop4ESP(void *stack);
extern "C" void * pushStarESP(void *stack);
extern "C" void * popStarESP(void *stack);
extern "C" void * pushFlags(void *stack);
extern "C" void * pushIZero(void *stack);
extern "C" void * pushWIZero(void *stack);
extern "C" void * pushIM1(void *stack);
extern "C" void * pushIs16(void *stack);
extern "C" void * pushMemAbs(void *stack);
extern "C" void * pushCS(void *stack);
extern "C" UINT16 readCS();
extern "C" void * pushFS(void *stack);
extern "C" UINT16 readFS();

/* Test maskMovQ */
static int tmq()
{
    UINT64 dest = 0;
    UINT64 mTrue= UINT64(0x80);
    UINT64 mOnes= UINT64(0xff);
    UINT64 mask = mTrue<<(7*8) | mTrue<<(5*8) | mTrue<<(3*8) | mTrue<<(1*8);
    UINT64 src  = UINT64(INT64(-1));

    MaskMovQ(&dest, src, mask);
    if (dest == (mOnes<<(7*8) | mOnes<<(5*8) | mOnes<<(3*8) | mOnes<<(1*8)))
    {
        printf ("MaskMov: OK\n");
        return 0;
    }
    else
    {
        printf ("***Fail*** MaskMov: result 0x%08x%08x\n", UINT32(dest>>32), UINT32(dest));
        return 1;
    }
}

/* test some unpleasant push and pop cases */
static int tPushPop()
{
    void * stack[3];
    void ** stackTop = &stack[2];
    void *finalAddr= pushESP(stackTop);
    int fails = 0;

    // push %esp
    if (finalAddr != &stack[1] ||
        stack[1]  != stackTop)
    {
        printf ("***Fail*** PushESP : top %p, result %p value %p\n", stackTop, finalAddr, stack[1]);
        fails++;
    }
    else
    {
        printf ("push %%esp: OK\n");
    }

    // pop %esp
    stack[0] = (void *)0x1234;
    finalAddr = popESP(&stack[0]);
    if (finalAddr != (void *)0x1234)
    {
        printf ("***Fail*** PopESP: result %p\n", finalAddr);
        fails++;
    }
    else
    {
        printf ("pop %%esp: OK\n");
    }

    // push (%esp)
    stack[0] = 0;
    stack[1] = (void *)0xdefaced0;
    stack[2] = 0;
    finalAddr = pushStarESP(&stack[1]);

    if (finalAddr != &stack[0] ||
        stack[0] != stack[1] ||
        stack[1] != (void *)0xdefaced0)
    {
        printf ("***Fail***: push (%%esp)\n");
        fails++;
    }
    else
    {
        printf ("push (%%esp): OK\n");
    }

    // pop (%esp)
    stack[0] = (void *)0xfaded;
    stack[2] = 0;
    finalAddr = popStarESP(&stack[0]);

    if (finalAddr != &stack[1] ||
        stack[0] != stack[1] ||
        stack[1] != (void *)0xfaded ||
        stack[2] != 0)
    {
        printf ("***Fail***: pop (%%esp)\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
        printf ("stack[0]  : %p should be 0xfaded\n", stack[0]);
        printf ("stack[1]  : %p should be 0xfaded\n", stack[1]);
        printf ("stack[2]  : 0x%08x should be 0\n", UINT32(stack[2]));
        fails++;
    }
    else
    {
        printf ("pop (%%esp): OK\n");
    }

    // push 4(%esp)
    stack[0] = 0;
    stack[1] = 0;
    stack[2] = (void *)0xdefaced0;
    finalAddr = push4ESP(&stack[1]);

    if (finalAddr != &stack[0] ||
        stack[0] != stack[2] ||
        stack[2] != (void *)0xdefaced0)
    {
        printf ("***Fail***: push 4(%%esp)\n");
        fails++;
    }
    else
    {
        printf ("push 4(%%esp): OK\n");
    }

    // pop 4(%esp)
    stack[0] = (void *)-1;
    stack[1] = (void *)0xfaded;
    stack[2] = 0;
    finalAddr = pop4ESP(&stack[0]);

    if (finalAddr != &stack[1] ||
        stack[0] != (void *)-1 ||
        stack[1] != (void *)0xfaded ||
        stack[2] != stack[0])
    {
        printf ("***Fail***: pop 4(%%esp)\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
        printf ("stack[0]  : %p should be -1\n", stack[0]);
        printf ("stack[1]  : %p should be 0xfaded\n", stack[1]);
        printf ("stack[2]  : 0x%08x should be -1\n", UINT32(stack[2]));
        fails++;
    }
    else
    {
        printf ("pop (%%esp): OK\n");
    }


    finalAddr = pushFlags(&stack[1]);
    if (finalAddr != &stack[0])
    {
        printf ("***Fail***: pushFlags wrong ESP\n");
        fails++;
    }
    
    printf ("Flags pushed : 0x%08x\n", UINT32(stack[0]) & ~4); 

    stack[0] = stack[1] = stack[2] = (void *)-1;
    finalAddr = pushIZero(&stack[2]);
    if (finalAddr != &stack[1] ||
        stack[1] != 0)
    {
        printf ("***Fail***: pushl $0\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
        printf ("stack[1]  : %p should be 0\n", stack[1]);
        fails++;
    }
    else
        printf ("pushl $0: OK\n");

    stack[0] = stack[1] = stack[2] = (void *)-1;
    finalAddr = pushWIZero(&stack[2]);
    if (finalAddr != (((char *)&stack[1])+2) ||
        stack[1] != (void *)0xffff)
    {
        printf ("***Fail***: pushw $0\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, ((char *)&stack[1])+2);
        printf ("stack[1]  : %p should be 0xffff\n", stack[1]);
        fails++;
    }
    else
        printf ("pushw $0: OK\n");

    stack[0] = stack[1] = stack[2] = (void *)0;
    finalAddr = pushIM1(&stack[2]);
    if (finalAddr != &stack[1] ||
        stack[1] != (void *)-1)
    {
        printf ("***Fail***: pushl $-1\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
        printf ("stack[1]  : %p should be -1\n", stack[1]);
        fails++;
    }
    else
        printf ("pushl $-1: OK\n");

    stack[0] = stack[1] = stack[2] = (void *)0;
    finalAddr = pushIs16(&stack[2]);
    if (finalAddr != &stack[1] ||
        stack[1] != (void *)0xffff8000)
    {
        printf ("***Fail***: pushl $0xffff8000\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
        printf ("stack[1]  : %p should be 0xffff8000\n", stack[1]);
        fails++;
    }
    else
        printf ("pushl $0xffff8000: OK\n");

    stack[0] = stack[1] = stack[2] = (void *)-1;
    finalAddr = pushMemAbs(&stack[2]);
    if (finalAddr != &stack[1] ||
        stack[1] != (void *)0x01234567)
    {
        printf ("***Fail***: pushl absoluteAddress\n");
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
        printf ("stack[1]  : %p should be 0x01234567\n", stack[1]);
        fails++;
    }
    else
        printf ("pushl absoluteAddress: OK\n");

    printf ("%%cs = 0x%04x\n", readCS());
    stack[0] = stack[1] = stack[2] = (void *)-1;
    finalAddr = pushCS(&stack[2]);
    if (finalAddr != &stack[1])
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
    printf ("After push %%cs, value pushed is %p\n", stack[1]);

    stack[0] = stack[1] = stack[2] = (void *)0xaaaaaaaa;
    finalAddr = pushCS(&stack[2]);
    if (finalAddr != &stack[1])
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
    printf ("After push %%cs, value pushed is %p\n", stack[1]);
    
    printf ("%%fs = 0x%04x\n", readFS());
    stack[0] = stack[1] = stack[2] = (void *)0xaaaaaaaa;
    finalAddr = pushFS(&stack[2]);
    if (finalAddr != &stack[1])
        printf ("FinalAddr : %p should be %p\n", finalAddr, &stack[1]);
    printf ("After push %%fs, value pushed is 0x%04x\n", UINT32(stack[1]) & 0x0000ffff);

    return fails;
}

int main()
{
    int res = FarCallTest();
    int fails = res != 5;

    printf("Res is 0x%x\n", res);

    fails += tmq();
    fails += tPushPop();

    return fails;
}

