/*- * SPDX-License-Identifier: BSD-3-Clause * * Copyright (c) 1993 Jan-Simon Pendry * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * * 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. * * @(#)procfs_status.c 8.3 (Berkeley) 2/17/94 * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #ifdef COMPAT_FREEBSD32 #include #endif #include #include #include #include #include #include #include #include #include #include #define MEBUFFERSIZE 256 /* * The map entries can *almost* be read with programs like cat. However, * large maps need special programs to read. It is not easy to implement * a program that can sense the required size of the buffer, and then * subsequently do a read with the appropriate size. This operation cannot * be atomic. The best that we can do is to allow the program to do a read * with an arbitrarily large buffer, and return as much as we can. We can * return an error code if the buffer is too small (EFBIG), then the program * can try a bigger buffer. */ int procfs_doprocmap(PFS_FILL_ARGS) { struct vmspace *vm; vm_map_t map; vm_map_entry_t entry, tmp_entry; struct vnode *vp; char *fullpath, *freepath, *type; struct ucred *cred; vm_object_t obj, tobj, lobj; int error, privateresident, ref_count, resident, shadow_count, flags; vm_offset_t e_start, e_end; vm_eflags_t e_eflags; vm_prot_t e_prot; unsigned int last_timestamp; bool super; #ifdef COMPAT_FREEBSD32 bool wrap32; #endif PROC_LOCK(p); error = p_candebug(td, p); PROC_UNLOCK(p); if (error) return (error); if (uio->uio_rw != UIO_READ) return (EOPNOTSUPP); #ifdef COMPAT_FREEBSD32 wrap32 = false; if (SV_CURPROC_FLAG(SV_ILP32)) { if (!(SV_PROC_FLAG(p, SV_ILP32))) return (EOPNOTSUPP); wrap32 = true; } #endif vm = vmspace_acquire_ref(p); if (vm == NULL) return (ESRCH); map = &vm->vm_map; vm_map_lock_read(map); VM_MAP_ENTRY_FOREACH(entry, map) { if (entry->eflags & MAP_ENTRY_IS_SUB_MAP) continue; e_eflags = entry->eflags; e_prot = entry->protection; e_start = entry->start; e_end = entry->end; privateresident = 0; resident = 0; obj = entry->object.vm_object; if (obj != NULL) { VM_OBJECT_RLOCK(obj); if (obj->shadow_count == 1) privateresident = obj->resident_page_count; } cred = (entry->cred) ? entry->cred : (obj ? obj->cred : NULL); for (lobj = tobj = obj; tobj != NULL; tobj = tobj->backing_object) { if (tobj != obj) VM_OBJECT_RLOCK(tobj); lobj = tobj; } if (obj != NULL) kern_proc_vmmap_resident(map, entry, &resident, &super); for (tobj = obj; tobj != NULL; tobj = tobj->backing_object) { if (tobj != obj && tobj != lobj) VM_OBJECT_RUNLOCK(tobj); } last_timestamp = map->timestamp; vm_map_unlock_read(map); freepath = NULL; fullpath = "-"; if (lobj) { vp = NULL; switch (lobj->type) { default: case OBJT_DEFAULT: type = "default"; break; case OBJT_VNODE: type = "vnode"; vp = lobj->handle; vref(vp); break; case OBJT_SWAP: if ((lobj->flags & OBJ_TMPFS_NODE) != 0) { type = "vnode"; if ((lobj->flags & OBJ_TMPFS) != 0) { vp = lobj->un_pager.swp.swp_tmpfs; vref(vp); } } else { type = "swap"; } break; case OBJT_SG: case OBJT_DEVICE: type = "device"; break; } if (lobj != obj) VM_OBJECT_RUNLOCK(lobj); flags = obj->flags; ref_count = obj->ref_count; shadow_count = obj->shadow_count; VM_OBJECT_RUNLOCK(obj); if (vp != NULL) { vn_fullpath(vp, &fullpath, &freepath); vrele(vp); } } else { type = "none"; flags = 0; ref_count = 0; shadow_count = 0; } /* * format: * start, end, resident, private resident, cow, access, type, * charged, charged uid. */ error = sbuf_printf(sb, "0x%lx 0x%lx %d %d %p %s%s%s %d %d 0x%x %s %s %s %s %s %d\n", (u_long)e_start, (u_long)e_end, resident, privateresident, #ifdef COMPAT_FREEBSD32 wrap32 ? NULL : obj, /* Hide 64 bit value */ #else obj, #endif (e_prot & VM_PROT_READ)?"r":"-", (e_prot & VM_PROT_WRITE)?"w":"-", (e_prot & VM_PROT_EXECUTE)?"x":"-", ref_count, shadow_count, flags, (e_eflags & MAP_ENTRY_COW)?"COW":"NCOW", (e_eflags & MAP_ENTRY_NEEDS_COPY)?"NC":"NNC", type, fullpath, cred ? "CH":"NCH", cred ? cred->cr_ruid : -1); if (freepath != NULL) free(freepath, M_TEMP); vm_map_lock_read(map); if (error == -1) { error = 0; break; } if (last_timestamp != map->timestamp) { /* * Look again for the entry because the map was * modified while it was unlocked. Specifically, * the entry may have been clipped, merged, or deleted. */ vm_map_lookup_entry(map, e_end - 1, &tmp_entry); entry = tmp_entry; } } vm_map_unlock_read(map); vmspace_free(vm); return (error); }