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Add way to ignore signals

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This commit is contained in:
jD91mZM2
2019-07-30 15:54:25 +02:00
parent 62cd298202
commit ad5f3814fa
3 changed files with 15 additions and 8 deletions
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src/context/signal.rs
+9 -2
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@@ -1,7 +1,7 @@
use alloc::sync::Arc;
use core::mem;
use syscall::data::PtraceEvent;
use syscall::flag::{PTRACE_STOP_SIGNAL, SIG_DFL, SIG_IGN, SIGCHLD, SIGCONT, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU};
use syscall::flag::{PTRACE_FLAG_IGNORE, PTRACE_STOP_SIGNAL, SIG_DFL, SIG_IGN, SIGCHLD, SIGCONT, SIGKILL, SIGSTOP, SIGTSTP, SIGTTIN, SIGTTOU};
use syscall::ptrace_event;
use crate::context::{contexts, switch, Status, WaitpidKey};
@@ -24,7 +24,14 @@ pub extern "C" fn signal_handler(sig: usize) {
let handler = action.sa_handler.map(|ptr| ptr as usize).unwrap_or(0);
ptrace::breakpoint_callback(PTRACE_STOP_SIGNAL, Some(ptrace_event!(PTRACE_STOP_SIGNAL, sig, handler)));
let thumbs_down = ptrace::breakpoint_callback(PTRACE_STOP_SIGNAL, Some(ptrace_event!(PTRACE_STOP_SIGNAL, sig, handler)))
.and_then(|_| ptrace::next_breakpoint().map(|f| f.contains(PTRACE_FLAG_IGNORE)));
if sig != SIGKILL && thumbs_down.unwrap_or(false) {
// If signal can be and was ignored
crate::syscall::sigreturn().unwrap();
unreachable!();
}
if handler == SIG_DFL {
match sig {