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_extpdp.c (1217B)

      1#include<stdio.h>
      2#include<assert.h>
      3
      4int main()
      5{
      6    int rt, ach, acl, dsp, pos, efi;
      7    int result;
      8
      9    ach = 0x05;
     10    acl = 0xB4CB;
     11    dsp = 0x07;
     12    result = 0x000C;
     13
     14    __asm
     15        ("wrdsp %1, 0x01\n\t"
     16         "mthi %2, $ac1\n\t"
     17         "mtlo %3, $ac1\n\t"
     18         "extpdp %0, $ac1, 0x03\n\t"
     19         "rddsp %1\n\t"
     20         : "=r"(rt), "+r"(dsp)
     21         : "r"(ach), "r"(acl)
     22        );
     23    pos =  dsp & 0x3F;
     24    efi = (dsp >> 14) & 0x01;
     25    assert(pos == 3);
     26    assert(efi == 0);
     27    assert(result == rt);
     28
     29    ach = 0x05;
     30    acl = 0xB4CB;
     31    dsp = 0x01;
     32
     33    __asm
     34        ("wrdsp %1, 0x01\n\t"
     35         "mthi %2, $ac1\n\t"
     36         "mtlo %3, $ac1\n\t"
     37         "extpdp %0, $ac1, 0x03\n\t"
     38         "rddsp %1\n\t"
     39         : "=r"(rt), "+r"(dsp)
     40         : "r"(ach), "r"(acl)
     41        );
     42    efi = (dsp >> 14) & 0x01;
     43    assert(efi == 1);
     44
     45
     46    ach = 0;
     47    acl = 0;
     48    dsp = 0;
     49    result = 0;
     50
     51    __asm
     52        ("wrdsp %1\n\t"
     53         "mthi %2, $ac1\n\t"
     54         "mtlo %3, $ac1\n\t"
     55         "extpdp %0, $ac1, 0x00\n\t"
     56         "rddsp %1\n\t"
     57         : "=r"(rt), "+r"(dsp)
     58         : "r"(ach), "r"(acl)
     59        );
     60    assert(dsp == 0x3F);
     61    assert(result == rt);
     62
     63    return 0;
     64}