Jeremy Soller
78 lines
2.0 KiB
Rust
78 lines
2.0 KiB
Rust
//! dlfcn implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/dlfcn.h.html
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use core::sync::atomic::{AtomicUsize, Ordering, ATOMIC_USIZE_INIT};
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use core::{ptr, str};
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use c_str::CStr;
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use platform::types::*;
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pub const RTLD_LAZY: c_int = 0x0001;
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pub const RTLD_NOW: c_int = 0x0002;
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pub const RTLD_GLOBAL: c_int = 0x0100;
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pub const RTLD_LOCAL: c_int = 0x0000;
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static ERROR_NOT_SUPPORTED: &'static CStr = c_str!("dlfcn not supported");
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#[thread_local]
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static ERROR: AtomicUsize = ATOMIC_USIZE_INIT;
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#[repr(C)]
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pub struct Dl_info {
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dli_fname: *const c_char,
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dli_fbase: *mut c_void,
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dli_sname: *const c_char,
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dli_saddr: *mut c_void,
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}
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#[no_mangle]
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pub unsafe extern "C" fn dladdr(addr: *mut c_void, info: *mut Dl_info) -> c_int {
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(*info).dli_fname = ptr::null();
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(*info).dli_fbase = ptr::null_mut();
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(*info).dli_sname = ptr::null();
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(*info).dli_saddr = ptr::null_mut();
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0
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}
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#[no_mangle]
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pub unsafe extern "C" fn dlopen(filename: *const c_char, flags: c_int) -> *mut c_void {
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let filename_opt = if filename.is_null() {
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None
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} else {
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Some(str::from_utf8_unchecked(
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CStr::from_ptr(filename).to_bytes(),
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))
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};
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eprintln!("dlopen({:?}, {:#>04x})", filename_opt, flags);
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if let Some(filename) = filename_opt {
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ERROR.store(ERROR_NOT_SUPPORTED.as_ptr() as usize, Ordering::SeqCst);
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ptr::null_mut()
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} else {
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1 as *mut c_void
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}
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}
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#[no_mangle]
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pub unsafe extern "C" fn dlsym(handle: *mut c_void, symbol: *const c_char) -> *mut c_void {
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let symbol_opt = if symbol.is_null() {
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None
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} else {
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Some(str::from_utf8_unchecked(CStr::from_ptr(symbol).to_bytes()))
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};
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eprintln!("dlsym({:p}, {:?})", handle, symbol_opt);
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ptr::null_mut()
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}
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#[no_mangle]
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pub extern "C" fn dlclose(handle: *mut c_void) -> c_int {
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0
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}
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#[no_mangle]
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pub extern "C" fn dlerror() -> *mut c_char {
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ERROR.swap(0, Ordering::SeqCst) as *mut c_char
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}
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