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Trying to fix ___syscall220

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This commit is contained in:
Syrus 2019-06-12 01:01:47 +02:00
parent 6ce4f5dca4
commit 109acd2fa3
2 changed files with 14 additions and 3 deletions
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5
lib/emscripten/src/lib.rs
View File

@ -76,6 +76,8 @@ lazy_static! {
const GLOBAL_BASE: u32 = 1024;
const STATIC_BASE: u32 = GLOBAL_BASE;
use ::libc::DIR as libcDIR;
pub struct EmscriptenData<'a> {
pub malloc: Func<'a, u32, u32>,
pub free: Func<'a, u32>,
@ -83,6 +85,7 @@ pub struct EmscriptenData<'a> {
pub memset: Func<'a, (u32, u32, u32), u32>,
pub stack_alloc: Func<'a, u32, u32>,
pub jumps: Vec<UnsafeCell<[u32; 27]>>,
pub opened_dirs: HashMap<i32, Box<*mut libcDIR>>,
pub dyn_call_i: Option<Func<'a, i32, i32>>,
pub dyn_call_ii: Option<Func<'a, (i32, i32), i32>>,
@ -224,6 +227,8 @@ impl<'a> EmscriptenData<'a> {
memset,
stack_alloc,
jumps: Vec::new(),
opened_dirs: HashMap::new(),
dyn_call_i,
dyn_call_ii,
dyn_call_iii,

12
lib/emscripten/src/syscalls/unix.rs
View File

@ -851,19 +851,25 @@ pub fn ___syscall196(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
// dirent structure is
// i64, i64, u16 (280), i8, [i8; 256]
pub fn ___syscall220(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
debug!("emscripten::___syscall220");
use super::super::env::get_emscripten_data;
let fd: i32 = varargs.get(ctx);
let dirp_addr: i32 = varargs.get(ctx);
let count: u32 = varargs.get(ctx);
debug!("emscripten::___syscall220 (getdents) {} {} {}", fd, dirp_addr, count);
let dirp = emscripten_memory_pointer!(ctx.memory(0), dirp_addr) as *mut u8;
let mut opened_dirs = &mut get_emscripten_data(ctx).opened_dirs;
// need to persist stream across calls?
let dir: *mut libc::DIR = unsafe { libc::fdopendir(fd) };
// let dir: *mut libc::DIR = unsafe { libc::fdopendir(fd) };
let mut dir = &*opened_dirs.entry(fd).or_insert_with(|| unsafe { Box::new(libc::fdopendir(fd)) });
let mut pos = 0;
let offset = 280;
while pos + offset <= count as usize {
let dirent = unsafe { readdir(dir) };
let dirent = unsafe { readdir(**dir) };
if dirent.is_null() {
break;
}