Fix (modified) audiod.

redox-rt/src/arch/x86_64.rs

@@ -212,7 +212,7 @@ asmfunction!(__relibc_internal_sigentry: ["
     lock btr [rcx + {pctl_off_pending}], eax
     jnc 1b
 2:
-    mov eax, edx
+    mov edx, eax
     shr edx, 5
     lock btr fs:[{tcb_sc_off} + {sc_word} + edx * 4], eax
     add eax, 64 // indicate signal was targeted at thread

redox-rt/src/signal.rs

@@ -42,7 +42,8 @@ pub struct SigStack {
 unsafe fn inner(stack: &mut SigStack) {
     let os = &Tcb::current().unwrap().os_specific;
 
-    let sig_idx = stack.sig_num;
+    let _targeted_thread_not_process = stack.sig_num >= 64;
+    stack.sig_num %= 64;
 
     // asm counts from 0
     stack.sig_num += 1;

src/platform/redox/mod.rs

@@ -802,9 +802,8 @@ impl Pal for Sys {
         os_tid: crate::pthread::OsTid,
         signal: usize,
     ) -> Result<(), crate::pthread::Errno> {
-        todo!();
-        /*syscall::kill(os_tid.context_id, signal)
-        .map_err(|error| crate::pthread::Errno(error.errno))?;*/
+        let killfd = FdGuard::new(syscall::dup(os_tid.thread_fd, b"signal")?);
+        syscall::write(*killfd, &(signal as u32).to_ne_bytes())?;
         Ok(())
     }
     fn current_os_tid() -> crate::pthread::OsTid {