first syscalls

crates/vestal/src/execute.rs

@@ -1,9 +1,25 @@
 use crate::*;
-
+use syscalls::{Sysno, syscall};
+static NAME: &'static [char] = &['\0'];
 impl Vestal {
     pub fn execute (&self, path: impl AsRef<Path>) -> Usually<()> {
-        Self::with_pe(&path, |pe, main, deps|{
-
+        Self::with_pe(&path, |buffer, pe, main, deps|{
+            let fd = Self::get_fd();
+            // TODO: compose in-memory ELF binary out of PE sections and Wine libraries
+            Self::write(fd, buffer);
+            println!("{fd}");
         })
     }
+    fn get_fd () -> usize {
+        match unsafe { syscall!(Sysno::memfd_create, NAME.as_ptr(), 0x0001, 0) } {
+            Err(no) => panic!("memfd_create failed: {no}"),
+            Ok(fd) => fd,
+        }
+    }
+    fn write (fd: usize, buffer: &[u8]) {
+        match unsafe { syscall!(Sysno::write, fd, buffer.as_ptr()) } {
+            Err(no) => panic!("write failed: {no}"),
+            Ok(_) => (),
+        }
+    }
 }

crates/vestal/src/inspect.rs

@@ -2,7 +2,7 @@ use crate::*;
 
 impl Vestal {
     pub fn inspect (&self, path: impl AsRef<Path>) -> Usually<()> {
-        Self::with_pe(&path, |pe, main, deps|{
+        Self::with_pe(&path, |buffer, pe, main, deps|{
             if let Some(main) = main {
                 println!("VSTPluginMain: {:?} + {:?}", &main.rva, &main.offset);
             } else {

crates/vestal/src/main.rs

@@ -29,7 +29,7 @@ impl Vestal {
     }
     pub fn with_pe (
         path: &impl AsRef<Path>,
-        cb:   impl Fn(&PE, Option<&Export>, HashMap<String, Vec<&Import>>)
+        cb:   impl Fn(&[u8], &PE, Option<&Export>, HashMap<String, Vec<&Import>>)
     ) -> Usually<()> {
         println!("PE: {}", path.as_ref().display());
         let buffer = std::fs::read(path.as_ref())?;
@@ -50,7 +50,7 @@ impl Vestal {
                     break
                 }
             }
-            cb(pe, main, imports);
+            cb(&buffer, pe, main, imports);
             Ok(())
         } else {
             Err("not a PE".into())