From 4b3d1aa5ca6a208def5367b11d9059f9b7564108 Mon Sep 17 00:00:00 2001
From: auronandace <auronandace@googlemail.com>
Date: Thu, 19 Feb 2026 09:46:56 +0000
Subject: [PATCH 1/2] change sa_flags in sigaction to int to match spec

---
 include/bits/signal.h        |  2 +-
 src/header/signal/mod.rs     | 11 +++++------
 src/platform/linux/signal.rs |  2 +-
 src/platform/redox/signal.rs |  2 +-
 4 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/include/bits/signal.h b/include/bits/signal.h
index 2a78547e46..6ce7a3480e 100644
--- a/include/bits/signal.h
+++ b/include/bits/signal.h
@@ -16,7 +16,7 @@ struct sigaction {
     void (*sa_handler)(int);
     void (*sa_sigaction)(int, siginfo_t *, void *);
   };
-  unsigned long sa_flags;
+  int sa_flags;
   void (*sa_restorer)(void);
   sigset_t sa_mask;
 };
diff --git a/src/header/signal/mod.rs b/src/header/signal/mod.rs
index 3f73906225..90a4894cfb 100644
--- a/src/header/signal/mod.rs
+++ b/src/header/signal/mod.rs
@@ -12,8 +12,7 @@ use crate::{
     platform::{
         self, ERRNO, Pal, PalSignal, Sys,
         types::{
-            c_char, c_int, c_ulong, c_ulonglong, c_void, pid_t, pthread_attr_t, pthread_t, size_t,
-            uid_t,
+            c_char, c_int, c_ulonglong, c_void, pid_t, pthread_attr_t, pthread_t, size_t, uid_t,
         },
     },
 };
@@ -54,7 +53,7 @@ pub const SIGEV_THREAD: c_int = 2;
 /// cbindgen:ignore
 pub struct sigaction {
     pub sa_handler: Option<extern "C" fn(c_int)>,
-    pub sa_flags: c_ulong,
+    pub sa_flags: c_int,
     pub sa_restorer: Option<unsafe extern "C" fn()>,
     pub sa_mask: sigset_t,
 }
@@ -316,9 +315,9 @@ pub extern "C" fn siginterrupt(sig: c_int, flag: c_int) -> c_int {
     unsafe { sigaction(sig, ptr::null_mut(), psa.as_mut_ptr()) };
     let mut sa = unsafe { psa.assume_init() };
     if flag != 0 {
-        sa.sa_flags &= !SA_RESTART as c_ulong;
+        sa.sa_flags &= !SA_RESTART as c_int;
     } else {
-        sa.sa_flags |= SA_RESTART as c_ulong;
+        sa.sa_flags |= SA_RESTART as c_int;
     }
 
     unsafe { sigaction(sig, &mut sa, ptr::null_mut()) }
@@ -472,7 +471,7 @@ pub unsafe extern "C" fn sigset(
         } else {
             let mut sa = sigaction {
                 sa_handler: func,
-                sa_flags: 0 as c_ulong,
+                sa_flags: c_int::from(0),
                 sa_restorer: None, // set by platform if applicable
                 sa_mask: sigset_t::default(),
             };
diff --git a/src/platform/linux/signal.rs b/src/platform/linux/signal.rs
index 2034aac627..570dd3f1cc 100644
--- a/src/platform/linux/signal.rs
+++ b/src/platform/linux/signal.rs
@@ -73,7 +73,7 @@ impl PalSignal for Sys {
         }
         let act = act.map(|act| {
             let mut act_clone = act.clone();
-            act_clone.sa_flags |= SA_RESTORER as c_ulong;
+            act_clone.sa_flags |= SA_RESTORER as c_int;
             act_clone.sa_restorer = Some(__restore_rt);
             act_clone
         });
diff --git a/src/platform/redox/signal.rs b/src/platform/redox/signal.rs
index 239624ca9e..95d29e3ac1 100644
--- a/src/platform/redox/signal.rs
+++ b/src/platform/redox/signal.rs
@@ -111,7 +111,7 @@ impl PalSignal for Sys {
                 SigactionKind::Ignore
             } else {
                 SigactionKind::Handled {
-                    handler: if c_act.sa_flags & crate::header::signal::SA_SIGINFO as c_ulong != 0 {
+                    handler: if c_act.sa_flags & crate::header::signal::SA_SIGINFO as c_int != 0 {
                         SignalHandler {
                             sigaction: unsafe { core::mem::transmute(c_act.sa_handler) },
                         }

From 92503ed298501435afcbb3a147ee8b53a4945173 Mon Sep 17 00:00:00 2001
From: auronandace <auronandace@googlemail.com>
Date: Thu, 19 Feb 2026 09:56:13 +0000
Subject: [PATCH 2/2] missed redox specific fix

---
 src/platform/redox/signal.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/platform/redox/signal.rs b/src/platform/redox/signal.rs
index 95d29e3ac1..f3c755e538 100644
--- a/src/platform/redox/signal.rs
+++ b/src/platform/redox/signal.rs
@@ -154,7 +154,7 @@ impl PalSignal for Sys {
                         unsafe { handler.handler }
                     },
                     sa_restorer: None,
-                    sa_flags: old_action.flags.bits().into(),
+                    sa_flags: old_action.flags.bits() as c_int,
                     sa_mask: old_action.mask,
                 },
             };