/usr.bin/procstat/procstat_auxv.c

https://bitbucket.org/freebsd/freebsd-head/ · C · 246 lines · 196 code · 18 blank · 32 comment · 30 complexity · c69837d7cdaab8ce319729281af26b40 MD5 · raw file

  1. /*-
  2. * Copyright (c) 2011 Mikolaj Golub
  3. * All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions
  7. * are met:
  8. * 1. Redistributions of source code must retain the above copyright
  9. * notice, this list of conditions and the following disclaimer.
  10. * 2. Redistributions in binary form must reproduce the above copyright
  11. * notice, this list of conditions and the following disclaimer in the
  12. * documentation and/or other materials provided with the distribution.
  13. *
  14. * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24. * SUCH DAMAGE.
  25. *
  26. * $FreeBSD$
  27. */
  28. #include <sys/param.h>
  29. #include <sys/elf.h>
  30. #include <sys/sysctl.h>
  31. #include <sys/user.h>
  32. #include <vm/vm.h>
  33. #include <err.h>
  34. #include <errno.h>
  35. #include <libprocstat.h>
  36. #include <limits.h>
  37. #include <stdio.h>
  38. #include <stdlib.h>
  39. #include <string.h>
  40. #include "procstat.h"
  41. #define PROC_AUXV_MAX 256
  42. static Elf_Auxinfo auxv[PROC_AUXV_MAX];
  43. static char prefix[256];
  44. #if __ELF_WORD_SIZE == 64
  45. static Elf32_Auxinfo auxv32[PROC_AUXV_MAX];
  46. static const char *elf32_sv_names[] = {
  47. "Linux ELF32",
  48. "FreeBSD ELF32",
  49. };
  50. static int
  51. is_elf32(pid_t pid)
  52. {
  53. int error, name[4];
  54. size_t len, i;
  55. static char sv_name[256];
  56. name[0] = CTL_KERN;
  57. name[1] = KERN_PROC;
  58. name[2] = KERN_PROC_SV_NAME;
  59. name[3] = pid;
  60. len = sizeof(sv_name);
  61. error = sysctl(name, 4, sv_name, &len, NULL, 0);
  62. if (error != 0 || len == 0)
  63. return (0);
  64. for (i = 0; i < sizeof(elf32_sv_names) / sizeof(*elf32_sv_names); i++) {
  65. if (strncmp(sv_name, elf32_sv_names[i], sizeof(sv_name)) == 0)
  66. return (1);
  67. }
  68. return (0);
  69. }
  70. static size_t
  71. retrieve_auxv32(pid_t pid)
  72. {
  73. int name[4];
  74. size_t len, i;
  75. void *ptr;
  76. name[0] = CTL_KERN;
  77. name[1] = KERN_PROC;
  78. name[2] = KERN_PROC_AUXV;
  79. name[3] = pid;
  80. len = sizeof(auxv32);
  81. if (sysctl(name, 4, auxv32, &len, NULL, 0) == -1) {
  82. if (errno != ESRCH && errno != EPERM)
  83. warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
  84. return (0);
  85. }
  86. for (i = 0; i < len; i++) {
  87. /*
  88. * XXX: We expect that values for a_type on a 32-bit platform
  89. * are directly mapped to those on 64-bit one, which is not
  90. * necessarily true.
  91. */
  92. auxv[i].a_type = auxv32[i].a_type;
  93. ptr = &auxv32[i].a_un;
  94. auxv[i].a_un.a_val = *((uint32_t *)ptr);
  95. }
  96. return (len);
  97. }
  98. #endif /* __ELF_WORD_SIZE == 64 */
  99. #define PRINT(name, spec, val) \
  100. printf("%s %-16s " #spec "\n", prefix, #name, (val))
  101. #define PRINT_UNKNOWN(type, val) \
  102. printf("%s %16ld %#lx\n", prefix, (long)type, (u_long)(val))
  103. static size_t
  104. retrieve_auxv(pid_t pid)
  105. {
  106. int name[4];
  107. size_t len;
  108. #if __ELF_WORD_SIZE == 64
  109. if (is_elf32(pid))
  110. return (retrieve_auxv32(pid));
  111. #endif
  112. name[0] = CTL_KERN;
  113. name[1] = KERN_PROC;
  114. name[2] = KERN_PROC_AUXV;
  115. name[3] = pid;
  116. len = sizeof(auxv);
  117. if (sysctl(name, 4, auxv, &len, NULL, 0) == -1) {
  118. if (errno != ESRCH && errno != EPERM)
  119. warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
  120. return (0);
  121. }
  122. return (len);
  123. }
  124. void
  125. procstat_auxv(struct kinfo_proc *kipp)
  126. {
  127. size_t len, i;
  128. if (!hflag)
  129. printf("%5s %-16s %-16s %-16s\n", "PID", "COMM", "AUXV", "VALUE");
  130. len = retrieve_auxv(kipp->ki_pid);
  131. if (len == 0)
  132. return;
  133. snprintf(prefix, sizeof(prefix), "%5d %-16s", kipp->ki_pid,
  134. kipp->ki_comm);
  135. for (i = 0; i < len; i++) {
  136. switch(auxv[i].a_type) {
  137. case AT_NULL:
  138. return;
  139. case AT_IGNORE:
  140. break;
  141. case AT_EXECFD:
  142. PRINT(AT_EXECFD, %ld, (long)auxv[i].a_un.a_val);
  143. break;
  144. case AT_PHDR:
  145. PRINT(AT_PHDR, %p, auxv[i].a_un.a_ptr);
  146. break;
  147. case AT_PHENT:
  148. PRINT(AT_PHENT, %ld, (long)auxv[i].a_un.a_val);
  149. break;
  150. case AT_PHNUM:
  151. PRINT(AT_PHNUM, %ld, (long)auxv[i].a_un.a_val);
  152. break;
  153. case AT_PAGESZ:
  154. PRINT(AT_PAGESZ, %ld, (long)auxv[i].a_un.a_val);
  155. break;
  156. case AT_BASE:
  157. PRINT(AT_BASE, %p, auxv[i].a_un.a_ptr);
  158. break;
  159. case AT_FLAGS:
  160. PRINT(AT_FLAGS, %#lx, (u_long)auxv[i].a_un.a_val);
  161. break;
  162. case AT_ENTRY:
  163. PRINT(AT_ENTRY, %p, auxv[i].a_un.a_ptr);
  164. break;
  165. #ifdef AT_NOTELF
  166. case AT_NOTELF:
  167. PRINT(AT_NOTELF, %ld, (long)auxv[i].a_un.a_val);
  168. break;
  169. #endif
  170. #ifdef AT_UID
  171. case AT_UID:
  172. PRINT(AT_UID, %ld, (long)auxv[i].a_un.a_val);
  173. break;
  174. #endif
  175. #ifdef AT_EUID
  176. case AT_EUID:
  177. PRINT(AT_EUID, %ld, (long)auxv[i].a_un.a_val);
  178. break;
  179. #endif
  180. #ifdef AT_GID
  181. case AT_GID:
  182. PRINT(AT_GID, %ld, (long)auxv[i].a_un.a_val);
  183. break;
  184. #endif
  185. #ifdef AT_EGID
  186. case AT_EGID:
  187. PRINT(AT_EGID, %ld, (long)auxv[i].a_un.a_val);
  188. break;
  189. #endif
  190. case AT_EXECPATH:
  191. PRINT(AT_EXECPATH, %p, auxv[i].a_un.a_ptr);
  192. break;
  193. case AT_CANARY:
  194. PRINT(AT_CANARY, %p, auxv[i].a_un.a_ptr);
  195. break;
  196. case AT_CANARYLEN:
  197. PRINT(AT_CANARYLEN, %ld, (long)auxv[i].a_un.a_val);
  198. break;
  199. case AT_OSRELDATE:
  200. PRINT(AT_OSRELDATE, %ld, (long)auxv[i].a_un.a_val);
  201. break;
  202. case AT_NCPUS:
  203. PRINT(AT_NCPUS, %ld, (long)auxv[i].a_un.a_val);
  204. break;
  205. case AT_PAGESIZES:
  206. PRINT(AT_PAGESIZES, %p, auxv[i].a_un.a_ptr);
  207. break;
  208. case AT_PAGESIZESLEN:
  209. PRINT(AT_PAGESIZESLEN, %ld, (long)auxv[i].a_un.a_val);
  210. break;
  211. case AT_STACKPROT:
  212. if ((auxv[i].a_un.a_val & VM_PROT_EXECUTE) != 0)
  213. PRINT(AT_STACKPROT, %s, "NONEXECUTABLE");
  214. else
  215. PRINT(AT_STACKPROT, %s, "EXECUTABLE");
  216. break;
  217. #ifdef AT_TIMEKEEP
  218. case AT_TIMEKEEP:
  219. PRINT(AT_TIMEKEEP, %p, auxv[i].a_un.a_ptr);
  220. break;
  221. #endif
  222. default:
  223. PRINT_UNKNOWN(auxv[i].a_type, auxv[i].a_un.a_val);
  224. break;
  225. }
  226. }
  227. printf("\n");
  228. }