syscall.sh / x64 / iopl
iopl
change I/O privilege level
sys_iopl(unsigned int level)| number | 172 (0xac) |
|---|---|
| abi | common |
| entry point | sys_iopl |
| since | Linux 3.3 |
| man page | iopl(2) |
| source | elixir.bootlin.com |
Registers
| register | value |
|---|---|
rax | 172, the syscall number |
rdi | unsigned int level |
rax | the return value |
Then run syscall to enter the kernel.
Same syscall on other architectures
Get this as JSON: https://api.syscall.sh/v2/syscalls/x64/iopl