none/tests/x86/cmpxchg8b.c

   1 #include "tests/asm.h"
   2 #include <stdio.h>
   3
   4 typedef unsigned long long int ULong;
   5 typedef unsigned int UInt;
   6
   7 ULong m64;
   8
   9 UInt eax;
  10 UInt ebx;
  11 UInt ecx;
  12 UInt edx;
  13 UInt zout;
  14
  15 extern void foo ( void );
  16 asm("\n"
  17     VG_SYM(foo) ":\n"
  18     "\tpushl %eax\n"
  19     "\tpushl %ebx\n"
  20     "\tpushl %ecx\n"
  21     "\tpushl %edx\n"
  22
  23     "\txorl %eax, %eax\n" // get eflags in a known state
  24
  25     "\tmovl " VG_SYM(eax) ",%eax\n"
  26     "\tmovl " VG_SYM(ebx) ",%ebx\n"
  27     "\tmovl " VG_SYM(ecx) ",%ecx\n"
  28     "\tmovl " VG_SYM(edx) ",%edx\n"
  29     "\tcmpxchg8b " VG_SYM(m64) "\n"
  30     "\tmovl %eax," VG_SYM(eax) "\n"
  31     "\tmovl %ebx," VG_SYM(ebx) "\n"
  32     "\tmovl %ecx," VG_SYM(ecx) "\n"
  33     "\tmovl %edx," VG_SYM(edx) "\n"
  34     "\tpushfl\n"
  35     "\tpopl %eax\n"
  36     "\tmovl %eax," VG_SYM(zout) "\n"
  37
  38     "\tpopl %edx\n"
  39     "\tpopl %ecx\n"
  40     "\tpopl %ebx\n"
  41     "\tpopl %eax\n"
  42     "\tret\n"
  43     );
  44
  45 int main ( void )
  46 {
  47    edx  = 0x11111111; eax = 0x22222222;
  48    ecx  = 0x33333333; ebx = 0x44444444;
  49    zout = 0x55555555;
  50    m64  = 0x1111111122222222ULL;
  51    foo();
  52    printf("0x%x 0x%x 0x%x 0x%x 0x%x 0x%llx\n",
  53           eax, ebx, ecx, edx, zout & 0xFFFF, m64 );
  54
  55    edx  = 0x11111111; eax = 0x22222222;
  56    ecx  = 0x33333333; ebx = 0x44444444;
  57    zout = 0x55555555;
  58    m64  = 0x1111111122222222ULL;
  59    m64 += 0x1ULL;
  60    foo();
  61    printf("0x%x 0x%x 0x%x 0x%x 0x%x 0x%llx\n",
  62           eax, ebx, ecx, edx, zout & 0xFFFF, m64 );
  63
  64    edx  = 0x11111111; eax = 0x22222222;
  65    ecx  = 0x33333333; ebx = 0x44444444;
  66    zout = 0x55555555;
  67    m64  = 0x1111111122222222ULL;
  68    m64 += 0x100000000ULL;
  69    foo();
  70    printf("0x%x 0x%x 0x%x 0x%x 0x%x 0x%llx\n",
  71           eax, ebx, ecx, edx, zout & 0xFFFF, m64 );
  72
  73    edx  = 0x11111111; eax = 0x22222222;
  74    ecx  = 0x33333333; ebx = 0x44444444;
  75    zout = 0x55555555;
  76    m64  = 0x6666666677777777ULL;
  77    foo();
  78    printf("0x%x 0x%x 0x%x 0x%x 0x%x 0x%llx\n",
  79           eax, ebx, ecx, edx, zout & 0xFFFF, m64 );
  80
  81    return 0;
  82 }