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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check_swap.c (2426B)

      1#include <stdio.h>
      2#include <stdlib.h>
      3#include <stdint.h>
      4#include "sys.h"
      5#include "crisutils.h"
      6
      7#define N 8
      8#define W 4
      9#define B 2
     10#define R 1
     11
     12static always_inline int cris_swap(const int mode, int x)
     13{
     14	switch (mode)
     15	{
     16		case N: asm ("swapn\t%0\n" : "+r" (x) : "0" (x)); break;
     17		case W: asm ("swapw\t%0\n" : "+r" (x) : "0" (x)); break;
     18		case B: asm ("swapb\t%0\n" : "+r" (x) : "0" (x)); break;
     19		case R: asm ("swapr\t%0\n" : "+r" (x) : "0" (x)); break;
     20		case B|R: asm ("swapbr\t%0\n" : "+r" (x) : "0" (x)); break;
     21		case W|R: asm ("swapwr\t%0\n" : "+r" (x) : "0" (x)); break;
     22		case W|B: asm ("swapwb\t%0\n" : "+r" (x) : "0" (x)); break;
     23		case W|B|R: asm ("swapwbr\t%0\n" : "+r" (x) : "0" (x)); break;
     24		case N|R: asm ("swapnr\t%0\n" : "+r" (x) : "0" (x)); break;
     25		case N|B: asm ("swapnb\t%0\n" : "+r" (x) : "0" (x)); break;
     26		case N|B|R: asm ("swapnbr\t%0\n" : "+r" (x) : "0" (x)); break;
     27		case N|W: asm ("swapnw\t%0\n" : "+r" (x) : "0" (x)); break;
     28		default:
     29			err();
     30			break;
     31	}
     32	return x;
     33}
     34
     35/* Made this a macro to be able to pick up the location of the errors.  */
     36#define verify_swap(mode, val, expected, n, z)          \
     37do {                                                    \
     38        int r;                                          \
     39        cris_tst_cc_init();                             \
     40	r = cris_swap(mode, val);                       \
     41        cris_tst_mov_cc(n, z);                          \
     42	if (r != expected)                              \
     43		err();                                  \
     44} while(0)
     45
     46void check_swap(void)
     47{
     48	/* Some of these numbers are borrowed from GDB's cris sim
     49	   testsuite.  */
     50	if (cris_swap(N, 0) != 0xffffffff)
     51		err();
     52	if (cris_swap(W, 0x12345678) != 0x56781234)
     53		err();
     54	if (cris_swap(B, 0x12345678) != 0x34127856)
     55		err();
     56
     57	verify_swap(R, 0x78134452, 0x1ec8224a, 0, 0);
     58	verify_swap(B, 0x78134452, 0x13785244, 0, 0);
     59	verify_swap(B|R, 0x78134452, 0xc81e4a22, 1, 0);
     60	verify_swap(W, 0x78134452, 0x44527813, 0, 0);
     61	verify_swap(W|R, 0x78134452, 0x224a1ec8, 0, 0);
     62	verify_swap(W|B|R, 0x78134452, 0x4a22c81e, 0, 0);
     63	verify_swap(N, 0x78134452, 0x87ecbbad, 1, 0);
     64	verify_swap(N|R, 0x78134452, 0xe137ddb5, 1, 0);
     65	verify_swap(N|B, 0x78134452, 0xec87adbb, 1, 0);
     66	verify_swap(N|B|R, 0x78134452, 0x37e1b5dd, 0, 0);
     67	verify_swap(N|W, 0x78134452, 0xbbad87ec, 1, 0);
     68	verify_swap(N|B|R, 0xffffffff, 0, 0, 1);
     69}
     70
     71int main(void)
     72{
     73	check_swap();
     74	pass();
     75	return 0;
     76}