diff options
Diffstat (limited to 'results/classifier/zero-shot-user-mode/syscall/1267955')
| -rw-r--r-- | results/classifier/zero-shot-user-mode/syscall/1267955 | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/results/classifier/zero-shot-user-mode/syscall/1267955 b/results/classifier/zero-shot-user-mode/syscall/1267955 new file mode 100644 index 000000000..5653b5f2b --- /dev/null +++ b/results/classifier/zero-shot-user-mode/syscall/1267955 @@ -0,0 +1,48 @@ +syscall: 0.573 +instruction: 0.298 +runtime: 0.129 + + + +[i386] Parity Flag Not Set On xor %eax,%eax + +Tested against qemu-1.7.0 as well as qemu-1.7.50 on Debian Sid + +Steps To Reproduce + +$ cat > prog.hex << EOF + +7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00 +02 00 03 00 01 00 00 00 54 80 04 08 34 00 00 00 +00 00 00 00 00 00 00 00 34 00 20 00 01 00 28 00 +00 00 00 00 01 00 00 00 00 00 00 00 00 80 04 08 +00 80 04 08 76 00 00 00 76 00 00 00 05 00 00 00 +00 10 00 00 + +31 c0 +9c + +b8 04 00 00 00 +bb 01 00 00 00 +89 e1 +ba 04 00 00 00 +cd 80 + +b8 01 00 00 00 +bb 00 00 00 00 +cd 80 + +EOF + +$ xxd -p -r prog.hex > prog +$ chmod 700 prog + +$ ./prog | hexdump -vC +00000000 46 02 00 00 |F...| +00000004 + +$ qemu-i386 ./prog | hexdump -vC +00000000 42 02 00 00 |B...| +00000004 + +On the other hand if [xor %eax, %eax] (31 c0) is replaced with sub %eax,%eax (29 c0), then the parity flag is set correctly. \ No newline at end of file |