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Trying to fix ___syscall146

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This commit is contained in:
Syrus Akbary 2018-11-29 23:55:36 -08:00
parent b5e93ecae8
commit 7f504c9f5e
1 changed files with 47 additions and 3 deletions
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50
src/apis/emscripten/syscalls.rs
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@ -486,11 +486,55 @@ pub extern "C" fn ___syscall146(
) -> ssize_t {
debug!("emscripten::___syscall146 (writev)");
let fd: i32 = varargs.get(instance);
let iov: u32 = varargs.get(instance);
let iov: i32 = varargs.get(instance);
let iovcnt: i32 = varargs.get(instance);
#[repr(C)]
struct GuestIovec {
iov_base: i32,
iov_len: i32,
}
debug!("=> fd: {}, iov: {}, iovcnt = {}", fd, iov, iovcnt);
let iov_addr = instance.memory_offset_addr(0, iov as usize) as *mut iovec;
unsafe { writev(fd, iov_addr, iovcnt) }
// let iov_addr = instance.memory_offset_addr(0, iov as usize) as *mut iovec;
let guest_iov_addr = instance.memory_offset_addr(0, iov as usize) as *mut GuestIovec;
// let mut ret: ssize_t = 0;
unsafe {
// let ioc_base =
let iov_addr = iovec {
iov_base: (*guest_iov_addr).iov_base as _,
iov_len: (*guest_iov_addr).iov_len as _,
};
// let base = (*guest_iov_addr).iov_base;
// for i in 0..iovcnt {
// // debug!("HEY");
// // let ptr_addr = (base + i*8) as usize as *const c_void;
// // let len = (base + i*8 + 4) as usize as *const usize;
// let ptr_addr = instance.memory_offset_addr(0, (base + i*8) as usize) as *const c_void;
// let len = instance.memory_offset_addr(0, (base + i*8 +4) as usize) as usize;
// debug!("=> iov_addr: {:?}, {:?}", ptr_addr, len);
// // unsafe {
// let curr = write(fd, ptr_addr, len);
// if curr < 0 {
// return -1;
// }
// ret = ret + curr;
// // }
// }
// ret
// for (var i = 0; i < iovcnt; i++) {
// var ptr = HEAP32[(((iov)+(i*8))>>2)];
// var len = HEAP32[(((iov)+(i*8 + 4))>>2)];
// let buf_addr = instance.memory_offset_addr(0, iov_addr.iov_base as usize) as *const c_void;
// write(fd, buf_addr, count as usize) as i32
// debug!("=> iov_addr: {:?}, {:?}", iov_addr.iov_base, iov_addr.iov_len);
writev(fd, &iov_addr, iovcnt)
}
}
// pread