diff --git a/native/src/base/files.hpp b/native/src/base/files.hpp
index dbcb96b78..08969d129 100644
--- a/native/src/base/files.hpp
+++ b/native/src/base/files.hpp
@@ -61,8 +61,7 @@ struct mmap_data : public byte_data {
 extern "C" {
 
 int mkdirs(const char *path, mode_t mode);
-ssize_t canonical_path(const char *path, char *buf, size_t bufsiz);
-ssize_t read_link(const char *pathname, char *buf, size_t bufsiz);
+ssize_t canonical_path(const char * __restrict__ path, char * __restrict__ buf, size_t bufsiz);
 
 } // extern "C"
 
@@ -74,7 +73,8 @@ void mv_dir(int src, int dest);
 void cp_afc(const char *src, const char *dest);
 void link_path(const char *src, const char *dest);
 void link_dir(int src, int dest);
-static inline ssize_t realpath(const char *path, char *buf, size_t bufsiz) {
+static inline ssize_t realpath(
+        const char * __restrict__ path, char * __restrict__ buf, size_t bufsiz) {
     return canonical_path(path, buf, bufsiz);
 }
 int getattr(const char *path, file_attr *a);
diff --git a/native/src/base/files.rs b/native/src/base/files.rs
index 6fae3224a..75589ceb0 100644
--- a/native/src/base/files.rs
+++ b/native/src/base/files.rs
@@ -12,8 +12,7 @@ pub mod unsafe_impl {
 
     use crate::slice_from_ptr_mut;
 
-    #[no_mangle]
-    pub unsafe extern "C" fn read_link(path: *const c_char, buf: *mut u8, bufsz: usize) -> isize {
+    pub unsafe fn readlink(path: *const c_char, buf: *mut u8, bufsz: usize) -> isize {
         let r = libc::readlink(path, buf.cast(), bufsz - 1);
         if r >= 0 {
             *buf.offset(r) = b'\0';
@@ -68,7 +67,7 @@ macro_rules! xopen_fd {
 }
 
 pub fn readlink(path: &CStr, data: &mut [u8]) -> isize {
-    unsafe { unsafe_impl::read_link(path.as_ptr(), data.as_mut_ptr(), data.len()) }
+    unsafe { unsafe_impl::readlink(path.as_ptr(), data.as_mut_ptr(), data.len()) }
 }
 
 pub fn fd_path(fd: RawFd, buf: &mut [u8]) -> isize {
diff --git a/native/src/base/xwrap.hpp b/native/src/base/xwrap.hpp
index c902454a2..8c4c1d1cd 100644
--- a/native/src/base/xwrap.hpp
+++ b/native/src/base/xwrap.hpp
@@ -40,8 +40,9 @@ int xfstatat(int dirfd, const char *pathname, struct stat *buf, int flags);
 int xdup(int fd);
 int xdup2(int oldfd, int newfd);
 int xdup3(int oldfd, int newfd, int flags);
-ssize_t xreadlink(const char *pathname, char *buf, size_t bufsiz);
-ssize_t xreadlinkat(int dirfd, const char *pathname, char *buf, size_t bufsiz);
+ssize_t xreadlink(const char * __restrict__ pathname, char * __restrict__ buf, size_t bufsiz);
+ssize_t xreadlinkat(
+        int dirfd, const char * __restrict__ pathname, char * __restrict__ buf, size_t bufsiz);
 int xsymlink(const char *target, const char *linkpath);
 int xsymlinkat(const char *target, int newdirfd, const char *linkpath);
 int xlinkat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath, int flags);
@@ -58,7 +59,7 @@ void *xmmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset
 ssize_t xsendfile(int out_fd, int in_fd, off_t *offset, size_t count);
 pid_t xfork();
 int xpoll(pollfd *fds, nfds_t nfds, int timeout);
-ssize_t xrealpath(const char *path, char *buf, size_t bufsiz);
-int xmknod(const char *pathname, mode_t mode, dev_t dev);
+ssize_t xrealpath(const char * __restrict__ path, char * __restrict__ buf, size_t bufsiz);
+int xmknod(const char * pathname, mode_t mode, dev_t dev);
 
 } // extern "C"
diff --git a/native/src/base/xwrap.rs b/native/src/base/xwrap.rs
index bdc914688..08a81c60f 100644
--- a/native/src/base/xwrap.rs
+++ b/native/src/base/xwrap.rs
@@ -16,7 +16,7 @@ mod unsafe_impl {
     use cfg_if::cfg_if;
     use libc::{c_char, nfds_t, off_t, pollfd};
 
-    use crate::unsafe_impl::read_link;
+    use crate::unsafe_impl::readlink;
     use crate::{perror, ptr_to_str, slice_from_ptr, slice_from_ptr_mut};
 
     #[no_mangle]
@@ -41,7 +41,7 @@ mod unsafe_impl {
 
     #[no_mangle]
     pub unsafe extern "C" fn xreadlink(path: *const c_char, buf: *mut u8, bufsz: usize) -> isize {
-        let r = read_link(path, buf, bufsz);
+        let r = readlink(path, buf, bufsz);
         if r < 0 {
             perror!("readlink");
         }
diff --git a/native/src/zygisk/entry.cpp b/native/src/zygisk/entry.cpp
index 9a5ddb5e2..227cd6d77 100644
--- a/native/src/zygisk/entry.cpp
+++ b/native/src/zygisk/entry.cpp
@@ -161,8 +161,10 @@ static vector<int> get_module_fds(bool is_64_bit) {
 }
 
 static bool get_exe(int pid, char *buf, size_t sz) {
-    ssprintf(buf, sz, "/proc/%d/exe", pid);
-    return xreadlink(buf, buf, sz) > 0;
+    char exe[128];
+    if (ssprintf(exe, sizeof(exe), "/proc/%d/exe", pid) < 0)
+        return false;
+    return xreadlink(exe, buf, sz) > 0;
 }
 
 static pthread_mutex_t zygiskd_lock = PTHREAD_MUTEX_INITIALIZER;