diff --git a/include/bits/wchar.h b/include/bits/wchar.h
index f0e2dd9a49..1619cb0fab 100644
--- a/include/bits/wchar.h
+++ b/include/bits/wchar.h
@@ -6,7 +6,9 @@
 #define WCHAR_MIN (0)
 #define WCHAR_MAX (0x7fffffff)
 
-typedef int32_t wchar_t;
-typedef uint32_t wint_t;
+#define __need_size_t
+#define __need_wchar_t
+#define __need_wint_t
+#define __need_NULL
 
 #endif /* _BITS_WCHAR_H */
diff --git a/include/stddef.h b/include/stddef.h
index 0ee2d47174..d9fbabd932 100644
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -7,6 +7,7 @@
 typedef signed long long ptrdiff_t;
 
 typedef int32_t wchar_t;
+typedef int32_t wint_t;
 
 typedef unsigned long long size_t;
 
diff --git a/src/crti/src/lib.rs b/src/crti/src/lib.rs
index 9843734faf..eb80c7c57a 100644
--- a/src/crti/src/lib.rs
+++ b/src/crti/src/lib.rs
@@ -30,7 +30,7 @@ global_asm!(r#"
     .global _init
     .type _init,%function
     _init:
-        stp x29,x30,[sp,-16]
+        stp x29,x30,[sp,-16]!
         mov x29,sp
         // stp: "stores two doublewords from the first and second argument to memory addressed by addr"
         // Body will be filled in by gcc and ended by crtn.o
@@ -39,7 +39,7 @@ global_asm!(r#"
     .global _fini
     .type _fini,%function
     _fini:
-        stp x29,x30,[sp,-16]
+        stp x29,x30,[sp,-16]!
         mov x29,sp
         // stp: "stores two doublewords from the first and second argument to memory addressed by addr"
         // Body will be filled in by gcc and ended by crtn.o
diff --git a/src/header/mod.rs b/src/header/mod.rs
index 901238bfa6..34a1eae146 100644
--- a/src/header/mod.rs
+++ b/src/header/mod.rs
@@ -30,6 +30,7 @@ pub mod stdio;
 pub mod stdlib;
 pub mod string;
 pub mod strings;
+pub mod sys_auxv;
 pub mod sys_file;
 pub mod sys_ioctl;
 pub mod sys_mman;
diff --git a/src/header/sys_auxv/cbindgen.toml b/src/header/sys_auxv/cbindgen.toml
new file mode 100644
index 0000000000..08b9683cb9
--- /dev/null
+++ b/src/header/sys_auxv/cbindgen.toml
@@ -0,0 +1,6 @@
+include_guard = "_SYS_AUXV_H"
+language = "C"
+style = "Tag"
+
+[enum]
+prefix_with_name = true
diff --git a/src/header/sys_auxv/mod.rs b/src/header/sys_auxv/mod.rs
new file mode 100644
index 0000000000..eeabca08ff
--- /dev/null
+++ b/src/header/sys_auxv/mod.rs
@@ -0,0 +1,11 @@
+//! sys/auxv.h implementation
+
+use platform::types::*;
+use platform::{Pal, Sys};
+
+pub const AT_HWCAP: usize = 16;
+
+#[no_mangle]
+pub extern "C" fn getauxval(_t: c_ulong) -> c_ulong {
+    0
+}