Added emscripten jmp instructions

src/apis/emscripten/jmp.rs

@@ -0,0 +1,34 @@
+use libc::{c_void, c_int};
+use crate::webassembly::Instance;
+
+
+/// setjmp
+pub extern "C" fn __setjmp(
+    env_addr: u32,
+    instance: &mut Instance,
+) -> c_int {
+    debug!("emscripten::__setjmp (setjmp)");
+    unsafe {
+        let env = instance.memory_offset_addr(0, env_addr as usize) as *mut c_void;
+        setjmp(env)
+    }
+}
+
+
+/// longjmp
+pub extern "C" fn __longjmp(
+    env_addr: u32,
+    val: c_int,
+    instance: &mut Instance,
+) -> ! {
+    debug!("emscripten::__longjmp (longjmp) {}", val);
+    unsafe {
+        let env = instance.memory_offset_addr(0, env_addr as usize) as *mut c_void;
+        longjmp(env, val)
+    };
+}
+
+extern "C" {
+    fn setjmp(env: *mut c_void) -> c_int;
+    fn longjmp(env: *mut c_void, val: c_int) -> !;
+}

src/apis/emscripten/mod.rs

@@ -8,6 +8,7 @@ mod env;
 mod errno;
 mod exception;
 mod io;
+mod jmp;
 mod lock;
 mod math;
 mod memory;
@@ -479,6 +480,9 @@ pub fn generate_emscripten_env<'a, 'b>() -> ImportObject<&'a str, &'b str> {
     );
     import_object.set("asm2wasm", "f64-rem", ImportValue::Func(math::f64_rem as _));
 
+    import_object.set("env", "__setjmp", ImportValue::Func(jmp::__setjmp as _));
+    import_object.set("env", "__longjmp", ImportValue::Func(jmp::__longjmp as _));
+
     mock_external!(import_object, _waitpid);
     mock_external!(import_object, _utimes);
     mock_external!(import_object, _usleep);