diff options
Diffstat (limited to 'gitlab/issues_text/target_i386/host_missing/accel_TCG/1376')
| -rw-r--r-- | gitlab/issues_text/target_i386/host_missing/accel_TCG/1376 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_i386/host_missing/accel_TCG/1376 b/gitlab/issues_text/target_i386/host_missing/accel_TCG/1376 new file mode 100644 index 000000000..06247c64a --- /dev/null +++ b/gitlab/issues_text/target_i386/host_missing/accel_TCG/1376 @@ -0,0 +1,15 @@ +x86 LSL and LAR fault +Description of problem: +From the description of LSL and LAR instructions in manual, `If the segment descriptor cannot be accessed or is an invalid type for the instruction, the ZF flag is cleared and no value is loaded in the destination operand.`. When it happens at the CPU, it seems they do nothing (nop). However, in QEMU, it crashes. +Steps to reproduce: +1. Compile this code +``` +void main() { + asm("mov rax, 0xa02e698e741f5a6a"); + asm("mov rbx, 0x20959ddd7a0aef"); + asm("lsl ax, bx"); +} +``` +2. Execute. QEMU crashes but CPU does not. This problem happens with LAR, too. +Additional information: +This bug is discovered by research conducted by KAIST SoftSec. |