cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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test_dsp_r1_extpdpv.c (919B)

      1#include<stdio.h>
      2#include<assert.h>
      3
      4int main()
      5{
      6    int rt, rs, ach, acl, dsp, pos, efi;
      7    int result;
      8
      9    ach = 0x05;
     10    acl = 0xB4CB;
     11    dsp = 0x07;
     12    rs  = 0x03;
     13    result = 0x000C;
     14
     15    __asm
     16        ("wrdsp %1, 0x01\n\t"
     17         "mthi %2, $ac1\n\t"
     18         "mtlo %3, $ac1\n\t"
     19         "extpdpv %0, $ac1, %4\n\t"
     20         "rddsp %1\n\t"
     21         : "=r"(rt), "+r"(dsp)
     22         : "r"(ach), "r"(acl), "r"(rs)
     23        );
     24    pos =  dsp & 0x3F;
     25    efi = (dsp >> 14) & 0x01;
     26    assert(pos == 3);
     27    assert(efi == 0);
     28    assert(result == rt);
     29
     30    ach = 0x05;
     31    acl = 0xB4CB;
     32    dsp = 0x01;
     33
     34    __asm
     35        ("wrdsp %1, 0x01\n\t"
     36         "mthi %2, $ac1\n\t"
     37         "mtlo %3, $ac1\n\t"
     38         "extpdpv %0, $ac1, %4\n\t"
     39         "rddsp %1\n\t"
     40         : "=r"(rt), "+r"(dsp)
     41         : "r"(ach), "r"(acl), "r"(rs)
     42        );
     43    efi = (dsp >> 14) & 0x01;
     44    assert(efi == 1);
     45
     46    return 0;
     47}