fix(relibc): implement getrlimit defaults + getdtablesize return; add kwin stub; kernel graphical_debug defer

local/patches/kernel/redox.patch

@@ -126,3 +126,22 @@ index 3159b9c4..c691eb8d 100644
                      _ => MadtEntry::Unknown(entry_type),
                  };
  
+
+diff --git a/src/devices/graphical_debug/mod.rs b/src/devices/graphical_debug/mod.rs
+index b701c9a8..00cc984d 100644
+--- a/src/devices/graphical_debug/mod.rs
++++ b/src/devices/graphical_debug/mod.rs
+@@ -59,7 +59,12 @@ pub fn init(env: &[u8]) {
+     );
+ 
+     let debug_display = DebugDisplay::new(width, height, stride, virt as *mut u32);
+-    *DEBUG_DISPLAY.lock() = Some(debug_display);
++    // FIXME: Writing to the framebuffer during early boot causes a hang on some
++    // QEMU configurations (virtio-vga, ramfb). The bootloader maps the framebuffer
++    // with default caching; the kernel remaps it with write-combining in memory::init().
++    // Early kernel access before that remap appears to stall. Deferring DEBUG_DISPLAY
++    // setup avoids the hang; userspace vesad/fbbootlogd handles graphical output.
++    // *DEBUG_DISPLAY.lock() = Some(debug_display);
+ }
+ 
+ #[allow(unused)]

local/patches/relibc/P3-getrlimit-getdtablesize.patch

@@ -0,0 +1,40 @@
+diff --git a/src/header/unistd/mod.rs b/src/header/unistd/mod.rs
+index 573d69ad..d7ebe10d 100644
+--- a/src/header/unistd/mod.rs
++++ b/src/header/unistd/mod.rs
+@@ -534,7 +534,7 @@ pub extern "C" fn getdtablesize() -> c_int {
+     };
+     if r == 0 {
+         let cur = unsafe { lim.assume_init() }.rlim_cur;
+-        match cur {
++        return match cur {
+             c if c < i32::MAX as u64 => c as i32,
+             _ => i32::MAX,
+         };
+     }
+     -1
+ }
+
+diff --git a/src/platform/redox/mod.rs b/src/platform/redox/mod.rs
+index 752339a7..3f44171b 100644
+--- a/src/platform/redox/mod.rs
++++ b/src/platform/redox/mod.rs
+@@ -736,10 +736,15 @@ impl Pal for Sys {
+     }
+ 
+     fn getrlimit(resource: c_int, mut rlim: Out<rlimit>) -> Result<()> {
+-        todo_skip!(0, "getrlimit({}, {:p}): not implemented", resource, rlim);
++        // Return sensible defaults without logging; full kernel syscall not yet available.
++        let (cur, max) = match resource {
++            sys_resource::RLIMIT_NOFILE => (65536, 65536),
++            sys_resource::RLIMIT_STACK => (8 * 1024 * 1024, RLIM_INFINITY as u64),
++            _ => (RLIM_INFINITY as u64, RLIM_INFINITY as u64),
++        };
+         rlim.write(rlimit {
+-            rlim_cur: RLIM_INFINITY,
+-            rlim_max: RLIM_INFINITY,
++            rlim_cur: cur,
++            rlim_max: max,
+         });
+         Ok(())
+     }

local/recipes/kde/kwin/recipe.toml

@@ -86,6 +86,14 @@ exit 0
 EOFBIN
 chmod +x "${STAGE}/bin/kwin_wayland"
 
+# Dummy kwin_wayland_wrapper binary
+cat > "${STAGE}/bin/kwin_wayland_wrapper" << 'EOFBIN'
+#!/bin/sh
+echo "KWin stub: kwin_wayland_wrapper not yet available on Redox (args: $@)"
+exit 0
+EOFBIN
+chmod +x "${STAGE}/bin/kwin_wayland_wrapper"
+
 # Minimal kwin header stubs for downstream compilation
 cat > "${STAGE}/include/kwin/kwinevents.h" << 'EOFHDR'
 #pragma once

recipes/core/relibc/recipe.toml

@@ -31,6 +31,7 @@ patches = [
     "../../../local/patches/relibc/P3-inet6-pton-ntop.patch",
     "../../../local/patches/relibc/P3-tcp-sockopt-forward.patch",
     "../../../local/patches/relibc/P3-dns-aaaa-getaddrinfo-ipv6.patch",
+    "../../../local/patches/relibc/P3-getrlimit-getdtablesize.patch",
 ]
 
 [build]