1/* $NetBSD: exec.h,v 1.162 2023/08/01 21:26:28 andvar Exp $ */
2
3/*-
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * @(#)exec.h 8.4 (Berkeley) 2/19/95
37 */
38
39/*-
40 * Copyright (c) 1993 Theo de Raadt. All rights reserved.
41 *
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
44 * are met:
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
50 *
51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
53 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
54 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
55 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
56 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
60 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 */
62
63/*-
64 * Copyright (c) 1994 Christopher G. Demetriou
65 *
66 * Redistribution and use in source and binary forms, with or without
67 * modification, are permitted provided that the following conditions
68 * are met:
69 * 1. Redistributions of source code must retain the above copyright
70 * notice, this list of conditions and the following disclaimer.
71 * 2. Redistributions in binary form must reproduce the above copyright
72 * notice, this list of conditions and the following disclaimer in the
73 * documentation and/or other materials provided with the distribution.
74 * 3. All advertising materials mentioning features or use of this software
75 * must display the following acknowledgement:
76 * This product includes software developed by the University of
77 * California, Berkeley and its contributors.
78 * 4. Neither the name of the University nor the names of its contributors
79 * may be used to endorse or promote products derived from this software
80 * without specific prior written permission.
81 *
82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
92 * SUCH DAMAGE.
93 *
94 * @(#)exec.h 8.4 (Berkeley) 2/19/95
95 */
96
97#ifndef _SYS_EXEC_H_
98#define _SYS_EXEC_H_
99
100struct pathbuf; /* from namei.h */
101
102
103/*
104 * The following structure is found at the top of the user stack of each
105 * user process. The ps program uses it to locate argv and environment
106 * strings. Programs that wish ps to display other information may modify
107 * it; normally ps_argvstr points to argv[0], and ps_nargvstr is the same
108 * as the program's argc. The fields ps_envstr and ps_nenvstr are the
109 * equivalent for the environment.
110 */
111struct ps_strings {
112 char **ps_argvstr; /* first of 0 or more argument strings */
113 int ps_nargvstr; /* the number of argument strings */
114 char **ps_envstr; /* first of 0 or more environment strings */
115 int ps_nenvstr; /* the number of environment strings */
116};
117
118#ifdef _KERNEL
119struct ps_strings32 {
120 uint32_t ps_argvstr; /* first of 0 or more argument strings */
121 int32_t ps_nargvstr; /* the number of argument strings */
122 uint32_t ps_envstr; /* first of 0 or more environment strings */
123 int32_t ps_nenvstr; /* the number of environment strings */
124};
125#endif
126
127#ifdef _KERNEL
128/*
129 * the following structures allow execve() to put together processes
130 * in a more extensible and cleaner way.
131 *
132 * the exec_package struct defines an executable being execve()'d.
133 * it contains the header, the vmspace-building commands, the vnode
134 * information, and the arguments associated with the newly-execve'd
135 * process.
136 *
137 * the exec_vmcmd struct defines a command description to be used
138 * in creating the new process's vmspace.
139 */
140
141#include <sys/uio.h>
142#include <sys/rwlock.h>
143
144struct lwp;
145struct proc;
146struct exec_package;
147struct vnode;
148struct coredump_iostate;
149
150typedef int (*exec_makecmds_fcn)(struct lwp *, struct exec_package *);
151
152struct execsw {
153 u_int es_hdrsz; /* size of header for this format */
154 exec_makecmds_fcn es_makecmds; /* function to setup vmcmds */
155 union { /* probe function */
156 int (*elf_probe_func)(struct lwp *,
157 struct exec_package *, void *, char *, vaddr_t *);
158 int (*ecoff_probe_func)(struct lwp *, struct exec_package *);
159 } u;
160 struct emul *es_emul; /* os emulation */
161 int es_prio; /* entry priority */
162 int es_arglen; /* Extra argument size in words */
163 /* Copy arguments on the new stack */
164 int (*es_copyargs)(struct lwp *, struct exec_package *,
165 struct ps_strings *, char **, void *);
166 /* Set registers before execution */
167 void (*es_setregs)(struct lwp *, struct exec_package *, vaddr_t);
168 /* Dump core */
169 int (*es_coredump)(struct lwp *, struct coredump_iostate *);
170 int (*es_setup_stack)(struct lwp *, struct exec_package *);
171};
172
173#define EXECSW_PRIO_ANY 0x000 /* default, no preference */
174#define EXECSW_PRIO_FIRST 0x001 /* this should be among first */
175#define EXECSW_PRIO_LAST 0x002 /* this should be among last */
176
177/* exec vmspace-creation command set; see below */
178struct exec_vmcmd_set {
179 u_int evs_cnt;
180 u_int evs_used;
181 struct exec_vmcmd *evs_cmds;
182};
183
184#define EXEC_DEFAULT_VMCMD_SETSIZE 9 /* # of cmds in set to start */
185struct exec_fakearg {
186 char *fa_arg;
187 size_t fa_len;
188};
189
190struct exec_package {
191 const char *ep_kname; /* kernel-side copy of file's name */
192 char *ep_resolvedname; /* fully resolved path from namei */
193 int ep_xfd; /* fexecve file descriptor */
194 void *ep_hdr; /* file's exec header */
195 u_int ep_hdrlen; /* length of ep_hdr */
196 u_int ep_hdrvalid; /* bytes of ep_hdr that are valid */
197 struct exec_vmcmd_set ep_vmcmds; /* vmcmds used to build vmspace */
198 struct vnode *ep_vp; /* executable's vnode */
199 struct vattr *ep_vap; /* executable's attributes */
200 vaddr_t ep_taddr; /* process's text address */
201 vsize_t ep_tsize; /* size of process's text */
202 vaddr_t ep_daddr; /* process's data(+bss) address */
203 vsize_t ep_dsize; /* size of process's data(+bss) */
204 vaddr_t ep_maxsaddr; /* proc's max stack addr ("top") */
205 vaddr_t ep_minsaddr; /* proc's min stack addr ("bottom") */
206 vsize_t ep_ssize; /* size of process's stack */
207 vaddr_t ep_entry; /* process's entry point */
208 vaddr_t ep_entryoffset; /* offset to entry point */
209 vaddr_t ep_vm_minaddr; /* bottom of process address space */
210 vaddr_t ep_vm_maxaddr; /* top of process address space */
211 u_int ep_flags; /* flags; see below. */
212 size_t ep_fa_len; /* byte size of ep_fa */
213 struct exec_fakearg *ep_fa; /* a fake args vector for scripts */
214 int ep_fd; /* a file descriptor we're holding */
215 void *ep_emul_arg; /* emulation argument */
216 const struct execsw *ep_esch;/* execsw entry */
217 struct vnode *ep_emul_root; /* base of emulation filesystem */
218 struct vnode *ep_interp; /* vnode of (elf) interpreter */
219 uint32_t ep_pax_flags; /* pax flags */
220 void (*ep_emul_arg_free)(void *);
221 /* free ep_emul_arg */
222 uint32_t ep_osversion; /* OS version */
223 char ep_machine_arch[12]; /* from MARCH note */
224};
225#define EXEC_INDIR 0x0001 /* script handling already done */
226#define EXEC_HASFD 0x0002 /* holding a shell script */
227#define EXEC_HASARGL 0x0004 /* has fake args vector */
228#define EXEC_SKIPARG 0x0008 /* don't copy user-supplied argv[0] */
229#define EXEC_DESTR 0x0010 /* destructive ops performed */
230#define EXEC_32 0x0020 /* 32-bit binary emulation */
231#define EXEC_FORCEAUX 0x0040 /* always use ELF AUX vector */
232#define EXEC_TOPDOWN_VM 0x0080 /* may use top-down VM layout */
233#define EXEC_FROM32 0x0100 /* exec'ed from 32-bit binary */
234
235struct exec_vmcmd {
236 int (*ev_proc)(struct lwp *, struct exec_vmcmd *);
237 /* procedure to run for region of vmspace */
238 vsize_t ev_len; /* length of the segment to map */
239 vaddr_t ev_addr; /* address in the vmspace to place it at */
240 struct vnode *ev_vp; /* vnode pointer for the file w/the data */
241 vsize_t ev_offset; /* offset in the file for the data */
242 u_int ev_prot; /* protections for segment */
243 int ev_flags;
244#define VMCMD_RELATIVE 0x0001 /* ev_addr is relative to base entry */
245#define VMCMD_BASE 0x0002 /* marks a base entry */
246#define VMCMD_FIXED 0x0004 /* entry must be mapped at ev_addr */
247#define VMCMD_STACK 0x0008 /* entry is for a stack */
248};
249
250/*
251 * functions used either by execve() or the various CPU-dependent execve()
252 * hooks.
253 */
254vaddr_t exec_vm_minaddr (vaddr_t);
255void kill_vmcmd (struct exec_vmcmd **);
256int exec_makecmds (struct lwp *, struct exec_package *);
257int exec_runcmds (struct lwp *, struct exec_package *);
258void vmcmdset_extend (struct exec_vmcmd_set *);
259void kill_vmcmds (struct exec_vmcmd_set *);
260int vmcmd_map_pagedvn (struct lwp *, struct exec_vmcmd *);
261int vmcmd_map_readvn (struct lwp *, struct exec_vmcmd *);
262int vmcmd_readvn (struct lwp *, struct exec_vmcmd *);
263int vmcmd_map_zero (struct lwp *, struct exec_vmcmd *);
264int copyargs (struct lwp *, struct exec_package *,
265 struct ps_strings *, char **, void *);
266int copyin_psstrings (struct proc *, struct ps_strings *);
267int copy_procargs (struct proc *, int, size_t *,
268 int (*)(void *, const void *, size_t, size_t), void *);
269void setregs (struct lwp *, struct exec_package *, vaddr_t);
270int check_veriexec (struct lwp *, struct vnode *,
271 struct exec_package *, int);
272int check_exec (struct lwp *, struct exec_package *,
273 struct pathbuf *, char **);
274int exec_init (int);
275int exec_read (struct lwp *, struct vnode *, u_long off,
276 void *, size_t, int);
277int exec_setup_stack (struct lwp *, struct exec_package *);
278
279void exec_free_emul_arg (struct exec_package *);
280
281
282/*
283 * Machine dependent functions
284 */
285struct core;
286struct core32;
287int cpu_coredump(struct lwp *, struct coredump_iostate *, struct core *);
288int cpu_coredump32(struct lwp *, struct coredump_iostate *, struct core32 *);
289
290int exec_add(struct execsw *, int);
291int exec_remove(struct execsw *, int);
292int exec_sigcode_alloc(const struct emul *);
293void exec_sigcode_free(const struct emul *);
294
295void new_vmcmd(struct exec_vmcmd_set *,
296 int (*)(struct lwp *, struct exec_vmcmd *),
297 vsize_t, vaddr_t, struct vnode *, u_long, u_int, int);
298#define NEW_VMCMD(evsp,lwp,len,addr,vp,offset,prot) \
299 new_vmcmd(evsp,lwp,len,addr,vp,offset,prot,0)
300#define NEW_VMCMD2(evsp,lwp,len,addr,vp,offset,prot,flags) \
301 new_vmcmd(evsp,lwp,len,addr,vp,offset,prot,flags)
302
303typedef int (*execve_fetch_element_t)(char * const *, size_t, char **);
304int execve1(struct lwp *, bool, const char *, int, char * const *,
305 char * const *, execve_fetch_element_t);
306
307struct posix_spawn_file_actions;
308struct posix_spawnattr;
309int check_posix_spawn (struct lwp *);
310void posix_spawn_fa_free(struct posix_spawn_file_actions *, size_t);
311int do_posix_spawn(struct lwp *, pid_t *, bool *, const char *,
312 struct posix_spawn_file_actions *, struct posix_spawnattr *,
313 char *const *, char *const *, execve_fetch_element_t);
314int exec_makepathbuf(struct lwp *, const char *, enum uio_seg,
315 struct pathbuf **, size_t *);
316
317extern int maxexec;
318extern krwlock_t exec_lock;
319
320/*
321 * Utility functions
322 */
323void emul_find_root(struct lwp *, struct exec_package *);
324int emul_find_interp(struct lwp *, struct exec_package *, const char *);
325
326#endif /* _KERNEL */
327
328#endif /* !_SYS_EXEC_H_ */