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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _SYS_EXEC_H_
#define _SYS_EXEC_H_
/*
* Before ps_args existed, the following structure, found at the top of
* the user stack of each user process, was used by ps(1) to locate
* environment and argv strings. Normally ps_argvstr points to the
* argv vector, and ps_nargvstr is the same as the program's argc. The
* fields ps_envstr and ps_nenvstr are the equivalent for the environment.
*
* Programs should now use setproctitle(3) to change ps output.
* setproctitle() always informs the kernel with sysctl and sets the
* pointers in ps_strings. The kern.proc.args sysctl first tries p_args.
* If p_args is NULL, it then falls back to reading ps_strings and following
* the pointers.
*/
struct ps_strings {
char **ps_argvstr; /* first of 0 or more argument strings */
unsigned int ps_nargvstr; /* the number of argument strings */
char **ps_envstr; /* first of 0 or more environment strings */
unsigned int ps_nenvstr; /* the number of environment strings */
};
struct image_params;
struct execsw {
int (*ex_imgact)(struct image_params *);
const char *ex_name;
};
#include <machine/exec.h>
#ifdef _KERNEL
#include <sys/cdefs.h>
/*
* Address of ps_strings structure (in user space).
* Prefer the kern.ps_strings or kern.proc.ps_strings sysctls to this constant.
*/
#define PS_STRINGS (USRSTACK - sizeof(struct ps_strings))
#define PROC_PS_STRINGS(p) \
((p)->p_vmspace->vm_stacktop - (p)->p_sysent->sv_psstringssz)
/*
* Address of signal trampoline (in user space).
* This assumes that the sigcode resides in the shared page.
*/
#define PROC_SIGCODE(p) \
((p)->p_vmspace->vm_shp_base + (p)->p_sysent->sv_sigcode_offset)
#define PROC_HAS_SHP(p) \
((p)->p_sysent->sv_shared_page_obj != NULL)
int exec_map_first_page(struct image_params *);
void exec_unmap_first_page(struct image_params *);
int exec_register(const struct execsw *);
int exec_unregister(const struct execsw *);
enum uio_seg;
/*
* note: name##_mod cannot be const storage because the
* linker_file_sysinit() function modifies _file in the
* moduledata_t.
*/
#include <sys/module.h>
#define EXEC_SET(name, execsw_arg) \
static int __CONCAT(name,_modevent)(module_t mod, int type, \
void *data) \
{ \
struct execsw *exec = (struct execsw *)data; \
int error = 0; \
switch (type) { \
case MOD_LOAD: \
/* printf(#name " module loaded\n"); */ \
error = exec_register(exec); \
if (error) \
printf(__XSTRING(name) "register failed\n"); \
break; \
case MOD_UNLOAD: \
/* printf(#name " module unloaded\n"); */ \
error = exec_unregister(exec); \
if (error) \
printf(__XSTRING(name) " unregister failed\n");\
break; \
default: \
error = EOPNOTSUPP; \
break; \
} \
return error; \
} \
static moduledata_t __CONCAT(name,_mod) = { \
__XSTRING(name), \
__CONCAT(name,_modevent), \
(void *)& execsw_arg \
}; \
DECLARE_MODULE_TIED(name, __CONCAT(name,_mod), SI_SUB_EXEC, \
SI_ORDER_ANY)
#endif
#endif

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