* Changed the _kern_exec() and _kern_load_image() syscalls. They expect

a flattened argument/environment buffer now. This simplifies the work
  for the kernel a bit, since it can just copy the buffer and check
  whether it looks OK instead of messing around with individual strings.
  The runtime loader also gets a flattened array.
* Set the maximum size of the arguments/environment buffer to 128 KB.
  When more arguments are passed, we fail with a proper error code
  (instead of just truncating the arguments as before).
* On exec*() the first argument was silently replaced by the given path
  name, which is not correct.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26119 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/team.h

@@ -51,16 +51,16 @@ struct user_thread* team_allocate_user_thread(struct team* team);
 void team_free_user_thread(struct thread* thread);
 
 // used in syscalls.c
-thread_id _user_load_image(int32 argCount, const char **args, int32 envCount,
-			const char **env, int32 priority, uint32 flags,
+thread_id _user_load_image(const char* const* flatArgs, size_t flatArgsSize,
+			int32 argCount, int32 envCount, int32 priority, uint32 flags,
 			port_id errorPort, uint32 errorToken);
 status_t _user_wait_for_team(team_id id, status_t *_returnCode);
 void _user_exit_team(status_t returnValue);
 status_t _user_kill_team(thread_id thread);
 thread_id _user_wait_for_child(thread_id child, uint32 flags, int32 *_reason,
 			status_t *_returnCode);
-status_t _user_exec(const char *path, int32 argc, char * const *argv,
-			int32 envCount, char * const *environment);
+status_t _user_exec(const char *path, const char* const* flatArgs,
+			size_t flatArgsSize, int32 argCount, int32 envCount);
 thread_id _user_fork(void);
 team_id _user_get_current_team(void);
 pid_t _user_process_info(pid_t process, int32 which);