1 #include "defs.h" 2 3 #include <sys/prctl.h> 4 5 #include "xlat/prctl_options.h" 6 #include "xlat/pr_unalign_flags.h" 7 #include "xlat/pr_mce_kill.h" 8 #include "xlat/pr_mce_kill_policy.h" 9 #include "xlat/pr_set_mm.h" 10 #include "xlat/pr_tsc.h" 11 12 #ifndef TASK_COMM_LEN 13 # define TASK_COMM_LEN 16 14 #endif 15 16 #ifdef HAVE_LINUX_SECCOMP_H 17 # include <linux/seccomp.h> 18 #endif 19 #include "xlat/seccomp_mode.h" 20 21 #ifdef HAVE_LINUX_SECUREBITS_H 22 # include <linux/securebits.h> 23 #endif 24 #include "xlat/secbits.h" 25 26 /* these constants are the same as in <linux/capability.h> */ 27 enum { 28 #include "caps0.h" 29 #include "caps1.h" 30 }; 31 32 #include "xlat/cap.h" 33 34 static int 35 prctl_enter(struct tcb *tcp) 36 { 37 unsigned int i; 38 39 printxval(prctl_options, tcp->u_arg[0], "PR_???"); 40 41 switch (tcp->u_arg[0]) { 42 /* PR_GET_* are decoded on exit. */ 43 case PR_GET_CHILD_SUBREAPER: 44 case PR_GET_DUMPABLE: 45 case PR_GET_ENDIAN: 46 case PR_GET_FPEMU: 47 case PR_GET_FPEXC: 48 case PR_GET_KEEPCAPS: 49 case PR_GET_NAME: 50 case PR_GET_PDEATHSIG: 51 case PR_GET_SECCOMP: 52 case PR_GET_SECUREBITS: 53 case PR_GET_TID_ADDRESS: 54 case PR_GET_TIMERSLACK: 55 case PR_GET_TIMING: 56 case PR_GET_TSC: 57 case PR_GET_UNALIGN: 58 /* PR_TASK_PERF_EVENTS_* have nothing to decode on enter. */ 59 case PR_TASK_PERF_EVENTS_DISABLE: 60 case PR_TASK_PERF_EVENTS_ENABLE: 61 break; 62 63 case PR_SET_CHILD_SUBREAPER: 64 case PR_SET_DUMPABLE: 65 case PR_SET_ENDIAN: 66 case PR_SET_FPEMU: 67 case PR_SET_FPEXC: 68 case PR_SET_KEEPCAPS: 69 case PR_SET_TIMING: 70 tprintf(", %lu", tcp->u_arg[1]); 71 break; 72 73 case PR_CAPBSET_DROP: 74 case PR_CAPBSET_READ: 75 tprints(", "); 76 printxval(cap, tcp->u_arg[1], "CAP_???"); 77 break; 78 79 case PR_MCE_KILL: 80 tprints(", "); 81 printxval(pr_mce_kill, tcp->u_arg[1], "PR_MCE_KILL_???"); 82 tprints(", "); 83 if (PR_MCE_KILL_SET == tcp->u_arg[1]) 84 printxval(pr_mce_kill_policy, tcp->u_arg[2], 85 "PR_MCE_KILL_???"); 86 else 87 tprintf("%#lx", tcp->u_arg[2]); 88 for (i = 3; i < tcp->s_ent->nargs; i++) 89 tprintf(", %#lx", tcp->u_arg[i]); 90 break; 91 92 case PR_SET_NAME: 93 tprints(", "); 94 printstr(tcp, tcp->u_arg[1], TASK_COMM_LEN); 95 break; 96 97 case PR_SET_MM: 98 tprints(", "); 99 printxval(pr_set_mm, tcp->u_arg[1], "PR_SET_MM_???"); 100 for (i = 2; i < tcp->s_ent->nargs; i++) 101 tprintf(", %#lx", tcp->u_arg[i]); 102 break; 103 104 case PR_SET_PDEATHSIG: 105 tprints(", "); 106 if ((unsigned long) tcp->u_arg[1] > 128) 107 tprintf("%lu", tcp->u_arg[1]); 108 else 109 tprints(signame(tcp->u_arg[1])); 110 break; 111 112 case PR_SET_PTRACER: 113 tprints(", "); 114 if (tcp->u_arg[1] == -1) 115 tprints("PR_SET_PTRACER_ANY"); 116 else 117 tprintf("%lu", tcp->u_arg[1]); 118 break; 119 120 case PR_SET_SECCOMP: 121 tprints(", "); 122 printxval(seccomp_mode, tcp->u_arg[1], 123 "SECCOMP_MODE_???"); 124 if (SECCOMP_MODE_STRICT == tcp->u_arg[1]) 125 break; 126 if (SECCOMP_MODE_FILTER == tcp->u_arg[1]) { 127 tprints(", "); 128 print_seccomp_filter(tcp, tcp->u_arg[2]); 129 break; 130 } 131 for (i = 2; i < tcp->s_ent->nargs; i++) 132 tprintf(", %#lx", tcp->u_arg[i]); 133 break; 134 135 case PR_SET_SECUREBITS: 136 tprints(", "); 137 printflags(secbits, tcp->u_arg[1], "SECBIT_???"); 138 break; 139 140 case PR_SET_TIMERSLACK: 141 tprintf(", %ld", tcp->u_arg[1]); 142 break; 143 144 case PR_SET_TSC: 145 tprints(", "); 146 printxval(pr_tsc, tcp->u_arg[1], "PR_TSC_???"); 147 break; 148 149 case PR_SET_UNALIGN: 150 tprints(", "); 151 printflags(pr_unalign_flags, tcp->u_arg[1], "PR_UNALIGN_???"); 152 break; 153 154 case PR_SET_NO_NEW_PRIVS: 155 case PR_SET_THP_DISABLE: 156 tprintf(", %lu", tcp->u_arg[1]); 157 for (i = 2; i < tcp->s_ent->nargs; i++) 158 tprintf(", %#lx", tcp->u_arg[i]); 159 break; 160 161 case PR_GET_NO_NEW_PRIVS: 162 case PR_GET_THP_DISABLE: 163 case PR_MCE_KILL_GET: 164 /* Return code of "GET" commands will be decoded on exit */ 165 case PR_MPX_DISABLE_MANAGEMENT: 166 case PR_MPX_ENABLE_MANAGEMENT: 167 default: 168 for (i = 1; i < tcp->s_ent->nargs; i++) 169 tprintf(", %#lx", tcp->u_arg[i]); 170 break; 171 } 172 return 0; 173 } 174 175 static int 176 prctl_exit(struct tcb *tcp) 177 { 178 unsigned long addr; 179 unsigned int i; 180 181 switch (tcp->u_arg[0]) { 182 case PR_CAPBSET_READ: 183 case PR_GET_DUMPABLE: 184 case PR_GET_KEEPCAPS: 185 case PR_GET_NO_NEW_PRIVS: 186 case PR_GET_SECCOMP: 187 case PR_GET_THP_DISABLE: 188 case PR_GET_TIMERSLACK: 189 case PR_GET_TIMING: 190 return syserror(tcp) ? 0 : RVAL_UDECIMAL; 191 192 case PR_GET_CHILD_SUBREAPER: 193 case PR_GET_ENDIAN: 194 case PR_GET_FPEMU: 195 case PR_GET_FPEXC: 196 tprints(", "); 197 /* cannot use printnum_int() because of syserror() */ 198 if (!tcp->u_arg[1]) 199 tprints("NULL"); 200 else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0) 201 tprintf("%#lx", tcp->u_arg[1]); 202 else 203 tprintf("[%u]", i); 204 break; 205 206 case PR_GET_NAME: 207 tprints(", "); 208 if (!tcp->u_arg[1]) 209 tprints("NULL"); 210 else if (syserror(tcp)) 211 tprintf("%#lx", tcp->u_arg[1]); 212 else 213 printstr(tcp, tcp->u_arg[1], -1); 214 break; 215 216 case PR_GET_PDEATHSIG: 217 tprints(", "); 218 if (!tcp->u_arg[1]) 219 tprints("NULL"); 220 else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0) 221 tprintf("%#lx", tcp->u_arg[1]); 222 else { 223 tprints("["); 224 tprints(signame(i)); 225 tprints("]"); 226 } 227 break; 228 229 case PR_GET_SECUREBITS: 230 if (syserror(tcp) || tcp->u_rval == 0) 231 return 0; 232 tcp->auxstr = sprintflags("", secbits, tcp->u_rval); 233 return RVAL_STR; 234 235 case PR_GET_TID_ADDRESS: 236 tprints(", "); 237 /* cannot use printnum_long() because of syserror() */ 238 if (!tcp->u_arg[1]) 239 tprints("NULL"); 240 else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &addr) < 0) 241 tprintf("%#lx", tcp->u_arg[1]); 242 else 243 tprintf("[%#lx]", addr); 244 break; 245 246 case PR_GET_TSC: 247 tprints(", "); 248 if (!tcp->u_arg[1]) 249 tprints("NULL"); 250 else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0) 251 tprintf("%#lx", tcp->u_arg[1]); 252 else { 253 tprints("["); 254 printxval(pr_tsc, i, "PR_TSC_???"); 255 tprints("]"); 256 } 257 break; 258 259 case PR_GET_UNALIGN: 260 tprints(", "); 261 if (!tcp->u_arg[1]) 262 tprints("NULL"); 263 else if (syserror(tcp) || umove(tcp, tcp->u_arg[1], &i) < 0) 264 tprintf("%#lx", tcp->u_arg[1]); 265 else { 266 tprints("["); 267 printflags(pr_unalign_flags, i, "PR_UNALIGN_???"); 268 tprints("]"); 269 } 270 break; 271 272 case PR_MCE_KILL_GET: 273 if (syserror(tcp)) 274 return 0; 275 tcp->auxstr = xlookup(pr_mce_kill_policy, tcp->u_rval); 276 return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL; 277 278 default: 279 break; 280 } 281 return 0; 282 } 283 284 SYS_FUNC(prctl) 285 { 286 return entering(tcp) ? prctl_enter(tcp) : prctl_exit(tcp); 287 } 288 289 #if defined X86_64 || defined X32 290 # include <asm/prctl.h> 291 # include "xlat/archvals.h" 292 293 SYS_FUNC(arch_prctl) 294 { 295 if (entering(tcp)) 296 printxval(archvals, tcp->u_arg[0], "ARCH_???"); 297 298 switch (tcp->u_arg[0]) { 299 case ARCH_GET_GS: 300 case ARCH_GET_FS: 301 if (exiting(tcp)) { 302 if (syserror(tcp)) 303 break; 304 tprints(", "); 305 printnum_long(tcp, tcp->u_arg[1], "%#lx"); 306 } 307 return 0; 308 default: 309 if (exiting(tcp)) 310 return 0; 311 } 312 313 tprintf(", %#lx", tcp->u_arg[1]); 314 return 0; 315 } 316 #endif /* X86_64 || X32 */ 317
