Differential D15468 Diff 51367 head/sys/compat/freebsd32/freebsd32_misc.c

Changeset View

Standalone View

head/sys/compat/freebsd32/freebsd32_misc.c

	Show First 20 Lines • Show All 331 Lines • ▼ Show 20 Lines
	* the pointers.			* the pointers.
	*/			*/
	int			int
	freebsd32_exec_copyin_args(struct image_args args, const char fname,			freebsd32_exec_copyin_args(struct image_args args, const char fname,
	enum uio_seg segflg, u_int32_t argv, u_int32_t envv)			enum uio_seg segflg, u_int32_t argv, u_int32_t envv)
	{			{
	char argp, envp;			char argp, envp;
	u_int32_t *p32, arg;			u_int32_t *p32, arg;
	size_t length;
	int error;			int error;

	bzero(args, sizeof(*args));			bzero(args, sizeof(*args));
	if (argv == NULL)			if (argv == NULL)
	return (EFAULT);			return (EFAULT);

	/*			/*
	* Allocate demand-paged memory for the file name, argument, and			* Allocate demand-paged memory for the file name, argument, and
	* environment strings.			* environment strings.
	*/			*/
	error = exec_alloc_args(args);			error = exec_alloc_args(args);
	if (error != 0)			if (error != 0)
	return (error);			return (error);

	/*			/*
	* Copy the file name.			* Copy the file name.
	*/			*/
	if (fname != NULL) {			error = exec_args_add_fname(args, fname, segflg);
	args->fname = args->buf;
	error = (segflg == UIO_SYSSPACE) ?
	copystr(fname, args->fname, PATH_MAX, &length) :
	copyinstr(fname, args->fname, PATH_MAX, &length);
	if (error != 0)			if (error != 0)
	goto err_exit;			goto err_exit;
	} else
	length = 0;

	args->begin_argv = args->buf + length;
	args->endp = args->begin_argv;
	args->stringspace = ARG_MAX;

	/*			/*
	* extract arguments first			* extract arguments first
	*/			*/
	p32 = argv;			p32 = argv;
	for (;;) {			for (;;) {
	error = copyin(p32++, &arg, sizeof(arg));			error = copyin(p32++, &arg, sizeof(arg));
	if (error)			if (error)
	goto err_exit;			goto err_exit;
	if (arg == 0)			if (arg == 0)
	break;			break;
	argp = PTRIN(arg);			argp = PTRIN(arg);
	error = copyinstr(argp, args->endp, args->stringspace, &length);			error = exec_args_add_arg(args, argp, UIO_USERSPACE);
	if (error) {			if (error != 0)
	if (error == ENAMETOOLONG)
	error = E2BIG;
	goto err_exit;			goto err_exit;
	}			}
	args->stringspace -= length;
	args->endp += length;
	args->argc++;
	}

	args->begin_envv = args->endp;

	/*			/*
	* extract environment strings			* extract environment strings
	*/			*/
	if (envv) {			if (envv) {
	p32 = envv;			p32 = envv;
	for (;;) {			for (;;) {
	error = copyin(p32++, &arg, sizeof(arg));			error = copyin(p32++, &arg, sizeof(arg));
	if (error)			if (error)
	goto err_exit;			goto err_exit;
	if (arg == 0)			if (arg == 0)
	break;			break;
	envp = PTRIN(arg);			envp = PTRIN(arg);
	error = copyinstr(envp, args->endp, args->stringspace,			error = exec_args_add_env(args, envp, UIO_USERSPACE);
	&length);			if (error != 0)
	if (error) {
	if (error == ENAMETOOLONG)
	error = E2BIG;
	goto err_exit;			goto err_exit;
	}
	args->stringspace -= length;
	args->endp += length;
	args->envc++;
	}			}
	}			}

	return (0);			return (0);

	err_exit:			err_exit:
	exec_free_args(args);			exec_free_args(args);
	return (error);			return (error);
	▲ Show 20 Lines • Show All 3,072 Lines • Show Last 20 Lines