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42 lines
1.3 KiB
Rust
42 lines
1.3 KiB
Rust
use crate::{
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log_syscall_entry,
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prelude::*,
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process::signal::{c_types::sigaction_t, sig_action::SigAction, sig_num::SigNum},
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syscall::SYS_RT_SIGACTION,
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util::{read_val_from_user, write_val_to_user},
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};
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use super::SyscallReturn;
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pub fn sys_rt_sigaction(
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sig_num: u8,
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sig_action_addr: Vaddr,
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old_sig_action_addr: Vaddr,
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sigset_size: u64,
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) -> Result<SyscallReturn> {
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log_syscall_entry!(SYS_RT_SIGACTION);
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let sig_num = SigNum::try_from(sig_num)?;
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debug!(
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"signal = {}, sig_action_addr = 0x{:x}, old_sig_action_addr = 0x{:x}, sigset_size = {}",
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sig_num.sig_name(),
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sig_action_addr,
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old_sig_action_addr,
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sigset_size
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);
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let current = current!();
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let mut sig_dispositions = current.sig_dispositions().lock();
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let old_action = sig_dispositions.get(sig_num);
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let old_action_c = old_action.as_c_type();
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if old_sig_action_addr != 0 {
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write_val_to_user(old_sig_action_addr, &old_action_c)?;
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}
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if sig_action_addr != 0 {
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let sig_action_c = read_val_from_user::<sigaction_t>(sig_action_addr)?;
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let sig_action = SigAction::try_from(sig_action_c).unwrap();
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trace!("sig action = {:?}", sig_action);
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sig_dispositions.set(sig_num, sig_action);
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}
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Ok(SyscallReturn::Return(0))
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}
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