Jeremy Soller
69 lines
1.7 KiB
Rust
69 lines
1.7 KiB
Rust
// Start code adapted from https://gitlab.redox-os.org/redox-os/relibc/blob/master/src/start.rs
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use c_str::CStr;
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use header::unistd;
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use platform::types::c_char;
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use super::linker::Linker;
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#[repr(C)]
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pub struct Stack {
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argc: isize,
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argv0: *const c_char,
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}
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#[no_mangle]
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pub extern "C" fn relibc_ld_so_start(sp: &'static mut Stack) -> usize {
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if sp.argc < 2 {
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eprintln!("ld.so [executable] [arguments...]");
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unistd::_exit(1);
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loop {}
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}
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// Pop the first argument (path to ld_so), and get the path of the program
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// TODO: Also retrieve LD_LIBRARY_PATH this way
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let path_c = unsafe {
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let mut argv = &mut sp.argv0 as *mut *const c_char;
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loop {
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let next_argv = argv.add(1);
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let arg = *next_argv;
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*argv = arg;
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argv = next_argv;
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if arg.is_null() {
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break;
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}
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}
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sp.argc -= 1;
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CStr::from_ptr(sp.argv0)
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};
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let path = match path_c.to_str() {
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Ok(ok) => ok,
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Err(err) => {
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eprintln!("ld.so: failed to parse path: {}", err);
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unistd::_exit(1);
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loop {}
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}
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};
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let mut linker = Linker::new("/usr/local/lib:/lib/x86_64-linux-gnu");
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match linker.load(&path, &path) {
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Ok(()) => (),
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Err(err) => {
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eprintln!("ld.so: failed to load '{}': {}", path, err);
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unistd::_exit(1);
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loop {}
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}
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}
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match linker.link(&path) {
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Ok(entry) => entry,
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Err(err) => {
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eprintln!("ld.so: failed to link '{}': {}", path, err);
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unistd::_exit(1);
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loop {}
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}
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}
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}
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