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|
x86: 0.997
semantic: 0.993
graphic: 0.807
architecture: 0.761
register: 0.732
device: 0.700
assembly: 0.661
ppc: 0.428
arm: 0.388
boot: 0.382
vnc: 0.341
debug: 0.324
socket: 0.314
kernel: 0.307
network: 0.272
mistranslation: 0.272
permissions: 0.246
risc-v: 0.238
peripherals: 0.199
i386: 0.198
performance: 0.192
PID: 0.155
files: 0.078
virtual: 0.061
VMM: 0.045
KVM: 0.044
TCG: 0.038
user-level: 0.022
hypervisor: 0.019
--------------------
x86: 1.000
i386: 0.993
semantic: 0.988
assembly: 0.970
debug: 0.228
register: 0.206
kernel: 0.077
files: 0.043
performance: 0.042
TCG: 0.033
user-level: 0.031
virtual: 0.025
architecture: 0.018
hypervisor: 0.013
peripherals: 0.012
device: 0.012
PID: 0.011
VMM: 0.008
network: 0.007
boot: 0.006
risc-v: 0.005
socket: 0.005
permissions: 0.005
KVM: 0.005
graphic: 0.003
vnc: 0.001
ppc: 0.001
mistranslation: 0.001
arm: 0.000
x86 BZHI semantic bug
Description of problem:
The result of instruction BZHI is different from the CPU. The value of destination register and SF of EFLAGS are different.
Steps to reproduce:
1. Compile this code
```
void main() {
asm("mov rax, 0xb1aa9da2fe33fe3");
asm("mov rbx, 0x80000000ffffffff");
asm("mov rcx, 0xf3fce8829b99a5c6");
asm("bzhi rax, rbx, rcx");
}
```
2. Execute and compare the result with the CPU.
- CPU
- RAX = 0x0x80000000ffffffff
- SF = 1
- QEMU
- RAX = 0xffffffff
- SF = 0
Additional information:
This bug is discovered by research conducted by KAIST SoftSec.
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