动态链接库+修复神秘光标问题

cleonos/c/apps/dltest_main.c

@@ -0,0 +1,48 @@
+#include <dlfcn.h>
+#include <stdio.h>
+
+typedef unsigned long long u64;
+typedef u64 (*dl_math2_fn)(u64, u64);
+typedef u64 (*dl_void_fn)(void);
+
+int cleonos_app_main(int argc, char **argv, char **envp) {
+    const char *lib_path = "/shell/libdemo.elf";
+    void *handle;
+    dl_math2_fn add_fn;
+    dl_math2_fn mul_fn;
+    dl_void_fn hello_fn;
+
+    (void)envp;
+
+    if (argc > 1 && argv != (char **)0 && argv[1] != (char *)0 && argv[1][0] != '\0') {
+        lib_path = argv[1];
+    }
+
+    handle = dlopen(lib_path, 0);
+    if (handle == (void *)0) {
+        (void)printf("[dltest] dlopen failed: %s\n", lib_path);
+        return 1;
+    }
+
+    add_fn = (dl_math2_fn)dlsym(handle, "cleonos_libdemo_add");
+    mul_fn = (dl_math2_fn)dlsym(handle, "cleonos_libdemo_mul");
+    hello_fn = (dl_void_fn)dlsym(handle, "cleonos_libdemo_hello");
+
+    if (add_fn == (dl_math2_fn)0 || mul_fn == (dl_math2_fn)0 || hello_fn == (dl_void_fn)0) {
+        (void)puts("[dltest] dlsym failed");
+        (void)dlclose(handle);
+        return 2;
+    }
+
+    (void)hello_fn();
+    (void)printf("[dltest] add(7, 35) = %llu\n", add_fn(7ULL, 35ULL));
+    (void)printf("[dltest] mul(6, 9) = %llu\n", mul_fn(6ULL, 9ULL));
+
+    if (dlclose(handle) != 0) {
+        (void)puts("[dltest] dlclose failed");
+        return 3;
+    }
+
+    (void)puts("[dltest] PASS");
+    return 0;
+}