lib: add liblaunch elf loader library

lib/liblaunch/include/launch.h

@@ -0,0 +1,73 @@
+#ifndef LAUNCH_H_
+#define LAUNCH_H_
+
+#include <mango/types.h>
+
+enum launch_status {
+	LAUNCH_OK,
+	/* a memory allocation failed */
+	LAUNCH_ERR_NO_MEMORY,
+	/* executable file is corrupt or of an unrecognised format. */
+	LAUNCH_ERR_INVALID_EXECUTABLE,
+	/* executable file IS valid and IS of a recognised format, but is
+	 * not supported by this machine (different class, architecture,
+	 * version, etc).
+	 */
+	LAUNCH_ERR_UNSUPPORTED_EXECUTABLE,
+	/* a particular dependency of the executable could not be resolved. */
+	LAUNCH_ERR_CANNOT_RESOLVE_DEPENDENCY,
+	LAUNCH_ERR_MEMORY_MAP_FAILED,
+	LAUNCH_ERR_IMAGE_DATA_LOAD_FAILED,
+	LAUNCH_ERR_INTERPRETER_REQUIRED,
+	LAUNCH_ERR_TASK_CREATION_FAILED,
+	LAUNCH_ERR_THREAD_CREATION_FAILED,
+};
+
+enum launch_flags {
+	LAUNCH_F_NONE = 0,
+};
+
+struct launch_ctx;
+
+typedef enum launch_status (*launch_resolve_library_function)(
+	struct launch_ctx *,
+	const char *,
+	kern_handle_t *,
+	void *);
+
+struct launch_ctx {
+	launch_resolve_library_function ctx_resolve_library;
+};
+
+struct launch_parameters {
+	kern_handle_t p_parent_task;
+	kern_handle_t p_local_address_space;
+	kern_handle_t p_executable;
+
+	const char *p_task_name;
+
+	int p_argc;
+	const char **p_argv;
+
+	int p_envc;
+	const char **p_envp;
+
+	void *p_resolver_arg;
+};
+
+struct launch_result {
+	kern_handle_t r_task;
+	kern_handle_t r_thread;
+	kern_handle_t r_address_space;
+};
+
+extern enum launch_status launch_ctx_init(struct launch_ctx *ctx);
+extern void launch_ctx_cleanup(struct launch_ctx *ctx);
+
+extern enum launch_status launch_ctx_execute(
+	struct launch_ctx *ctx,
+	const struct launch_parameters *params,
+	enum launch_flags flags,
+	struct launch_result *result);
+
+#endif