1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010 The FreeBSD Foundation 5 * All rights reserved. 6 * 7 * This software was developed by Rui Paulo under sponsorship from the 8 * FreeBSD Foundation. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 39 #include <rtld_db.h> 40 41 #include "_libproc.h" 42 43 static void rdl2prmap(const rd_loadobj_t *, prmap_t *); 44 45 static int 46 map_iter(const rd_loadobj_t *lop, void *arg) 47 { 48 struct file_info *file; 49 struct map_info *mapping, *tmp; 50 struct proc_handle *phdl; 51 size_t i; 52 53 phdl = arg; 54 if (phdl->nmappings >= phdl->maparrsz) { 55 phdl->maparrsz *= 2; 56 tmp = reallocarray(phdl->mappings, phdl->maparrsz, 57 sizeof(*phdl->mappings)); 58 if (tmp == NULL) 59 return (-1); 60 phdl->mappings = tmp; 61 } 62 63 mapping = &phdl->mappings[phdl->nmappings]; 64 rdl2prmap(lop, &mapping->map); 65 if (strcmp(lop->rdl_path, phdl->execpath) == 0 && 66 (lop->rdl_prot & RD_RDL_X) != 0) 67 phdl->exec_map = phdl->nmappings; 68 69 file = NULL; 70 if (lop->rdl_path[0] != '\0') { 71 /* Look for an existing mapping of the same file. */ 72 for (i = 0; i < phdl->nmappings; i++) 73 if (strcmp(mapping->map.pr_mapname, 74 phdl->mappings[i].map.pr_mapname) == 0) { 75 file = phdl->mappings[i].file; 76 break; 77 } 78 79 if (file == NULL) { 80 file = malloc(sizeof(*file)); 81 if (file == NULL) 82 return (-1); 83 file->elf = NULL; 84 file->fd = -1; 85 file->refs = 1; 86 } else 87 file->refs++; 88 } 89 mapping->file = file; 90 phdl->nmappings++; 91 return (0); 92 } 93 94 static void 95 rdl2prmap(const rd_loadobj_t *rdl, prmap_t *map) 96 { 97 98 map->pr_vaddr = rdl->rdl_saddr; 99 map->pr_size = rdl->rdl_eaddr - rdl->rdl_saddr; 100 map->pr_offset = rdl->rdl_offset; 101 map->pr_mflags = 0; 102 if (rdl->rdl_prot & RD_RDL_R) 103 map->pr_mflags |= MA_READ; 104 if (rdl->rdl_prot & RD_RDL_W) 105 map->pr_mflags |= MA_WRITE; 106 if (rdl->rdl_prot & RD_RDL_X) 107 map->pr_mflags |= MA_EXEC; 108 (void)strlcpy(map->pr_mapname, rdl->rdl_path, 109 sizeof(map->pr_mapname)); 110 } 111 112 rd_agent_t * 113 proc_rdagent(struct proc_handle *phdl) 114 { 115 116 if (phdl->rdap == NULL && phdl->status != PS_UNDEAD && 117 phdl->status != PS_IDLE) { 118 if ((phdl->rdap = rd_new(phdl)) == NULL) 119 return (NULL); 120 121 phdl->maparrsz = 64; 122 phdl->mappings = calloc(phdl->maparrsz, 123 sizeof(*phdl->mappings)); 124 if (phdl->mappings == NULL) 125 return (phdl->rdap); 126 if (rd_loadobj_iter(phdl->rdap, map_iter, phdl) != RD_OK) 127 return (NULL); 128 } 129 return (phdl->rdap); 130 } 131 132 void 133 proc_updatesyms(struct proc_handle *phdl) 134 { 135 136 memset(phdl->mappings, 0, sizeof(*phdl->mappings) * phdl->maparrsz); 137 rd_loadobj_iter(phdl->rdap, map_iter, phdl); 138 } 139