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Add prctl subcommand PR_GET_DUMPABLE/PR_SET_DUMPABLE

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This commit is contained in:
Qingsong Chen
2024-07-15 07:46:23 +00:00
committed by Tate, Hongliang Tian
parent 0417ad7376
commit da987db700
1 changed files with 25 additions and 0 deletions
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25
kernel/aster-nix/src/syscall/prctl.rs
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@ -35,6 +35,17 @@ pub fn sys_prctl(option: i32, arg2: u64, arg3: u64, arg4: u64, arg5: u64) -> Res
write_val_to_user(write_to_addr, &write_val)?;
}
PrctlCmd::PR_GET_DUMPABLE => {
// TODO: when coredump is supported, return the actual value
return Ok(SyscallReturn::Return(Dumpable::Disable as _));
}
PrctlCmd::PR_SET_DUMPABLE(dumpable) => {
if dumpable != Dumpable::Disable && dumpable != Dumpable::User {
return_errno!(Errno::EINVAL)
}
// TODO: implement coredump
}
PrctlCmd::PR_GET_NAME(write_to_addr) => {
let thread_name = posix_thread.thread_name().lock();
if let Some(thread_name) = &*thread_name {
@ -60,6 +71,8 @@ pub fn sys_prctl(option: i32, arg2: u64, arg3: u64, arg4: u64, arg5: u64) -> Res
const PR_SET_PDEATHSIG: i32 = 1;
const PR_GET_PDEATHSIG: i32 = 2;
const PR_GET_DUMPABLE: i32 = 3;
const PR_SET_DUMPABLE: i32 = 4;
const PR_SET_NAME: i32 = 15;
const PR_GET_NAME: i32 = 16;
const PR_SET_TIMERSLACK: i32 = 29;
@ -74,6 +87,16 @@ pub enum PrctlCmd {
PR_GET_NAME(Vaddr),
PR_SET_TIMERSLACK(u64),
PR_GET_TIMERSLACK,
PR_SET_DUMPABLE(Dumpable),
PR_GET_DUMPABLE,
}
#[repr(u64)]
#[derive(Debug, Clone, Copy, PartialEq, Eq, TryFromInt)]
pub enum Dumpable {
Disable = 0, /* No setuid dumping */
User = 1, /* Dump as user of process */
Root = 2, /* Dump as root */
}
impl PrctlCmd {
@ -84,6 +107,8 @@ impl PrctlCmd {
Ok(PrctlCmd::PR_SET_PDEATHSIG(signum))
}
PR_GET_PDEATHSIG => Ok(PrctlCmd::PR_GET_PDEATHSIG(arg2 as _)),
PR_GET_DUMPABLE => Ok(PrctlCmd::PR_GET_DUMPABLE),
PR_SET_DUMPABLE => Ok(PrctlCmd::PR_SET_DUMPABLE(Dumpable::try_from(arg2)?)),
PR_SET_NAME => Ok(PrctlCmd::PR_SET_NAME(arg2 as _)),
PR_GET_NAME => Ok(PrctlCmd::PR_GET_NAME(arg2 as _)),
PR_GET_TIMERSLACK => todo!(),