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Merge branch 'master' into feature/better-memory-access-for-emscripten

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This commit is contained in:
Syrus Akbary
2019-06-06 18:03:55 -07:00
committed by GitHub
parent 811acd7e68 ade70c6e1a
commit 98e04193af
3 changed files with 41 additions and 12 deletions
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34
lib/emscripten/src/syscalls/mod.rs
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@ -423,13 +423,25 @@ pub fn ___syscall146(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
}
pub fn ___syscall168(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall168");
debug!("emscripten::___syscall168 - stub");
-1
}
pub fn ___syscall191(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
debug!("emscripten::___syscall191 - stub");
-1
pub fn ___syscall191(ctx: &mut Ctx, _which: i32, mut varargs: VarArgs) -> i32 {
let _resource: i32 = varargs.get(ctx);
debug!(
"emscripten::___syscall191 - mostly stub, resource: {}",
_resource
);
let rlim_emptr: i32 = varargs.get(ctx);
let rlim_ptr = emscripten_memory_pointer!(ctx.memory(0), rlim_emptr) as *mut u8;
let rlim = unsafe { slice::from_raw_parts_mut(rlim_ptr, 16) };
// set all to RLIM_INIFINTY
LittleEndian::write_i64(&mut rlim[..], -1);
LittleEndian::write_i64(&mut rlim[8..], -1);
0
}
pub fn ___syscall199(_ctx: &mut Ctx, _one: i32, _two: i32) -> i32 {
@ -541,19 +553,23 @@ pub fn ___syscall340(ctx: &mut Ctx, _which: c_int, mut varargs: VarArgs) -> c_in
debug!("emscripten::___syscall340 (prlimit64), {}", _which);
// NOTE: Doesn't really matter. Wasm modules cannot exceed WASM_PAGE_SIZE anyway.
let _pid: i32 = varargs.get(ctx);
let _resource: i32 = varargs.get(ctx);
let resource: i32 = varargs.get(ctx);
let _new_limit: u32 = varargs.get(ctx);
let old_limit: u32 = varargs.get(ctx);
let val = match resource {
// RLIMIT_NOFILE
7 => 1024,
_ => -1, // RLIM_INFINITY
};
if old_limit != 0 {
// just report no limits
let buf_ptr = emscripten_memory_pointer!(ctx.memory(0), old_limit) as *mut u8;
let buf = unsafe { slice::from_raw_parts_mut(buf_ptr, 16) };
LittleEndian::write_i32(&mut buf[..], -1); // RLIM_INFINITY
LittleEndian::write_i32(&mut buf[4..], -1); // RLIM_INFINITY
LittleEndian::write_i32(&mut buf[8..], -1); // RLIM_INFINITY
LittleEndian::write_i32(&mut buf[12..], -1); // RLIM_INFINITY
LittleEndian::write_i64(&mut buf[..], val);
LittleEndian::write_i64(&mut buf[8..], val);
}
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