2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1993 Jan-Simon Pendry
6 * The Regents of the University of California. All rights reserved.
8 * This code is derived from software contributed to Berkeley by
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12 * modification, are permitted provided that the following conditions
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15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
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20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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35 * @(#)procfs_status.c 8.3 (Berkeley) 2/17/94
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/filedesc.h>
42 #include <sys/malloc.h>
43 #include <sys/mount.h>
45 #include <sys/resourcevar.h>
46 #include <sys/rwlock.h>
48 #ifdef COMPAT_FREEBSD32
49 #include <sys/sysent.h>
53 #include <sys/vnode.h>
55 #include <fs/pseudofs/pseudofs.h>
56 #include <fs/procfs/procfs.h>
59 #include <vm/vm_extern.h>
61 #include <vm/vm_map.h>
62 #include <vm/vm_page.h>
63 #include <vm/vm_object.h>
65 #define MEBUFFERSIZE 256
68 * The map entries can *almost* be read with programs like cat. However,
69 * large maps need special programs to read. It is not easy to implement
70 * a program that can sense the required size of the buffer, and then
71 * subsequently do a read with the appropriate size. This operation cannot
72 * be atomic. The best that we can do is to allow the program to do a read
73 * with an arbitrarily large buffer, and return as much as we can. We can
74 * return an error code if the buffer is too small (EFBIG), then the program
75 * can try a bigger buffer.
78 procfs_doprocmap(PFS_FILL_ARGS)
82 vm_map_entry_t entry, tmp_entry;
84 char *fullpath, *freepath, *type;
86 vm_object_t lobj, nobj, obj, tobj;
87 int error, flags, kvme, privateresident, ref_count, resident;
89 vm_offset_t e_start, e_end;
92 unsigned int last_timestamp;
94 #ifdef COMPAT_FREEBSD32
99 error = p_candebug(td, p);
104 if (uio->uio_rw != UIO_READ)
107 #ifdef COMPAT_FREEBSD32
109 if (SV_CURPROC_FLAG(SV_ILP32)) {
110 if (!(SV_PROC_FLAG(p, SV_ILP32)))
116 vm = vmspace_acquire_ref(p);
120 vm_map_lock_read(map);
121 VM_MAP_ENTRY_FOREACH(entry, map) {
122 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
125 e_eflags = entry->eflags;
126 e_prot = entry->protection;
127 e_start = entry->start;
131 obj = entry->object.vm_object;
133 VM_OBJECT_RLOCK(obj);
134 if (obj->shadow_count == 1)
135 privateresident = obj->resident_page_count;
137 cred = (entry->cred) ? entry->cred : (obj ? obj->cred : NULL);
139 for (lobj = tobj = obj; tobj != NULL;
140 tobj = tobj->backing_object) {
142 VM_OBJECT_RLOCK(tobj);
146 kern_proc_vmmap_resident(map, entry, &resident, &super);
147 for (tobj = obj; tobj != NULL; tobj = nobj) {
148 nobj = tobj->backing_object;
149 if (tobj != obj && tobj != lobj)
150 VM_OBJECT_RUNLOCK(tobj);
152 last_timestamp = map->timestamp;
153 vm_map_unlock_read(map);
158 kvme = vm_object_kvme_type(lobj, &vp);
174 case KVME_TYPE_VNODE:
178 case KVME_TYPE_DEVICE:
179 case KVME_TYPE_MGTDEVICE:
184 VM_OBJECT_RUNLOCK(lobj);
187 ref_count = obj->ref_count;
188 shadow_count = obj->shadow_count;
189 VM_OBJECT_RUNLOCK(obj);
191 vn_fullpath(vp, &fullpath, &freepath);
203 * start, end, resident, private-resident, obj, access,
204 * ref_count, shadow_count, flags, cow, needs_copy, type,
205 * fullpath, charged, charged uid.
207 error = sbuf_printf(sb,
208 "0x%lx 0x%lx %d %d %p %s%s%s %d %d 0x%x %s %s %s %s %s %d\n",
209 (u_long)e_start, (u_long)e_end,
210 resident, privateresident,
211 #ifdef COMPAT_FREEBSD32
212 wrap32 ? NULL : obj, /* Hide 64 bit value */
216 (e_prot & VM_PROT_READ)?"r":"-",
217 (e_prot & VM_PROT_WRITE)?"w":"-",
218 (e_prot & VM_PROT_EXECUTE)?"x":"-",
219 ref_count, shadow_count, flags,
220 (e_eflags & MAP_ENTRY_COW)?"COW":"NCOW",
221 (e_eflags & MAP_ENTRY_NEEDS_COPY)?"NC":"NNC",
223 cred ? "CH":"NCH", cred ? cred->cr_ruid : -1);
225 if (freepath != NULL)
226 free(freepath, M_TEMP);
227 vm_map_lock_read(map);
232 if (last_timestamp != map->timestamp) {
234 * Look again for the entry because the map was
235 * modified while it was unlocked. Specifically,
236 * the entry may have been clipped, merged, or deleted.
238 vm_map_lookup_entry(map, e_end - 1, &tmp_entry);
242 vm_map_unlock_read(map);