feature: passing args to execve()

libsys/src/calls.rs

@@ -204,12 +204,14 @@ pub unsafe fn sys_fork() -> Result<Option<Pid>, Errno> {
 ///
 /// System call
 #[inline(always)]
-pub fn sys_execve(pathname: &str) -> Result<(), Errno> {
+pub fn sys_execve(pathname: &str, argv: &[&str]) -> Result<(), Errno> {
     Errno::from_syscall_unit(unsafe {
         syscall!(
             SystemCall::Exec,
             argp!(pathname.as_ptr()),
-            argn!(pathname.len())
+            argn!(pathname.len()),
+            argp!(argv.as_ptr()),
+            argn!(argv.len())
         )
     })
 }

libsys/src/lib.rs

@@ -15,6 +15,14 @@ pub mod stat;
 pub mod termios;
 pub mod traits;
 
+#[derive(Debug)]
+pub struct ProgramArgs {
+    pub argv: usize,
+    pub argc: usize,
+    pub storage: usize,
+    pub size: usize
+}
+
 #[cfg(feature = "user")]
 pub mod calls;
 #[cfg(feature = "user")]

libsys/src/mem.rs

@@ -13,7 +13,7 @@ pub fn read_le16(src: &[u8]) -> u16 {
 /// Unsafe: writes to arbitrary memory locations, performs no pointer
 /// validation.
 #[no_mangle]
-pub unsafe extern "C" fn memcpy(dst: *mut u8, src: *mut u8, mut len: usize) -> *mut u8 {
+pub unsafe extern "C" fn memcpy(dst: *mut u8, src: *const u8, mut len: usize) -> *mut u8 {
     while len != 0 {
         len -= 1;
         *dst.add(len) = *src.add(len);