Fix makefile and loader NULL character stripping

.travis.yml

@@ -31,7 +31,7 @@ env:
 
 allow_failures:
     matrix:
-        - ARCH="aarch64"
+        - env: ARCH="aarch64"
         - os: osx
 
 install:
@@ -83,4 +83,6 @@ before_script:
 script:
   - cd user && make sfsimg arch=$ARCH && cd ..
   - cd kernel && make build arch=$ARCH $OPTS && cd ..
-  - cd tests && ./test.sh && cd ..
+  - if [ $ARCH = riscv64 ]; then
+        cd tests && ./test.sh && cd ..;
+    fi

kernel/Makefile

@@ -62,8 +62,7 @@ endif
 
 ### qemu options ###
 qemu_opts := \
-	-smp cores=$(smp) \
-	-append "test=biscuit/fork"
+	-smp cores=$(smp)
 qemu_net_opts := \
 	-netdev type=tap,id=net0,script=no,downscript=no
 

kernel/src/process/structs.rs

@@ -200,7 +200,7 @@ impl Thread {
         // Check interpreter
         if let Ok(loader_path) = elf.get_interpreter() {
             // assuming absolute path
-            if let Ok(inode) = crate::fs::ROOT_INODE.lookup_follow(&loader_path[1..], FOLLOW_MAX_DEPTH) {
+            if let Ok(inode) = crate::fs::ROOT_INODE.lookup_follow(loader_path, FOLLOW_MAX_DEPTH) {
                 if let Ok(buf) = inode.read_as_vec() {
                     debug!("using loader {}", &loader_path);
                     // Elf loader should not have INTERP
@@ -426,10 +426,14 @@ impl ElfExt for ElfFile<'_> {
         let header = self.program_iter()
             .filter(|ph| ph.get_type() == Ok(Type::Interp))
             .next().ok_or("no interp header")?;
-        let data = match header.get_data(self)? {
+        let mut data = match header.get_data(self)? {
             SegmentData::Undefined(data) => data,
             _ => unreachable!(),
         };
+        // skip NULL
+        while let Some(0) = data.last() {
+            data = &data[..data.len()-1];
+        }
         let path = str::from_utf8(data)
             .map_err(|_| "failed to convert to utf8")?;
         Ok(path)

user

@@ -1 +1 @@
-Subproject commit 586e682f064ca124a353d992cdf365e0d8234cb7
+Subproject commit 11e02349a790923ac3710159f731155f8323b94e