diff -ruN a/src/header/mod.rs b/src/header/mod.rs
--- a/src/header/mod.rs	2026-04-15 09:55:11.441949342 +0100
+++ b/src/header/mod.rs	2026-04-15 09:57:28.904091552 +0100
@@ -92,14 +92,14 @@
 pub mod sys_eventfd;
 pub mod sys_file;
 pub mod sys_ioctl;
-// TODO: sys/ipc.h
+pub mod sys_ipc;
 pub mod sys_mman;
 // TODO: sys/msg.h
 pub mod sys_ptrace;
 pub mod sys_resource;
 pub mod sys_select;
-// TODO: sys/sem.h
-// TODO: sys/shm.h
+pub mod sys_sem;
+pub mod sys_shm;
 pub mod sys_socket;
 pub mod sys_stat;
 pub mod sys_statvfs;
diff -ruN a/src/header/sys_ipc/cbindgen.toml b/src/header/sys_ipc/cbindgen.toml
--- a/src/header/sys_ipc/cbindgen.toml	1970-01-01 00:00:00.000000000 +0000
+++ b/src/header/sys_ipc/cbindgen.toml	2026-04-15 09:57:28.904120977 +0100
@@ -0,0 +1,9 @@
+sys_includes = ["sys/types.h"]
+include_guard = "_SYS_IPC_H"
+language = "C"
+style = "Tag"
+no_includes = true
+cpp_compat = true
+
+[enum]
+prefix_with_name = true
diff -ruN a/src/header/sys_ipc/mod.rs b/src/header/sys_ipc/mod.rs
--- a/src/header/sys_ipc/mod.rs	1970-01-01 00:00:00.000000000 +0000
+++ b/src/header/sys_ipc/mod.rs	2026-04-15 09:57:28.904159138 +0100
@@ -0,0 +1,31 @@
+//! `sys/ipc.h` implementation.
+
+use crate::platform::types::{c_int, c_ushort};
+
+pub type key_t = c_int;
+
+pub const IPC_PRIVATE: key_t = 0;
+pub const IPC_CREAT: c_int = 0o1000;
+pub const IPC_EXCL: c_int = 0o2000;
+pub const IPC_NOWAIT: c_int = 0o4000;
+
+pub const IPC_RMID: c_int = 0;
+pub const IPC_SET: c_int = 1;
+pub const IPC_STAT: c_int = 2;
+
+#[repr(C)]
+#[derive(Clone, Copy, Default)]
+pub struct ipc_perm {
+    pub __key: key_t,
+    pub uid: c_ushort,
+    pub gid: c_ushort,
+    pub cuid: c_ushort,
+    pub cgid: c_ushort,
+    pub mode: c_ushort,
+    pub __seq: c_ushort,
+}
+
+#[unsafe(no_mangle)]
+pub extern "C" fn _cbindgen_export_ipc_perm(value: ipc_perm) {
+    let _ = value;
+}
diff -ruN a/src/header/sys_sem/cbindgen.toml b/src/header/sys_sem/cbindgen.toml
--- a/src/header/sys_sem/cbindgen.toml	1970-01-01 00:00:00.000000000 +0000
+++ b/src/header/sys_sem/cbindgen.toml	2026-04-15 09:57:28.904183804 +0100
@@ -0,0 +1,9 @@
+sys_includes = ["sys/types.h", "sys/ipc.h", "stdint.h"]
+include_guard = "_SYS_SEM_H"
+language = "C"
+style = "Tag"
+no_includes = true
+cpp_compat = true
+
+[enum]
+prefix_with_name = true
diff -ruN a/src/header/sys_shm/cbindgen.toml b/src/header/sys_shm/cbindgen.toml
--- a/src/header/sys_shm/cbindgen.toml	1970-01-01 00:00:00.000000000 +0000
+++ b/src/header/sys_shm/cbindgen.toml	2026-04-15 09:57:28.904207067 +0100
@@ -0,0 +1,9 @@
+sys_includes = ["sys/types.h", "sys/ipc.h", "sys/mman.h", "stdint.h"]
+include_guard = "_SYS_SHM_H"
+language = "C"
+style = "Tag"
+no_includes = true
+cpp_compat = true
+
+[enum]
+prefix_with_name = true