/* * Copyright (c) 1994-1996 Rick Sladkey * Copyright (c) 1996-2000 Wichert Akkerman * Copyright (c) 2005-2007 Roland McGrath * Copyright (c) 2008-2015 Dmitry V. Levin * All rights reserved. * * 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. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. */ #include "defs.h" #include #include "xlat/prctl_options.h" #include "xlat/pr_cap_ambient.h" #include "xlat/pr_fp_mode.h" #include "xlat/pr_mce_kill.h" #include "xlat/pr_mce_kill_policy.h" #include "xlat/pr_set_mm.h" #include "xlat/pr_tsc.h" #include "xlat/pr_unalign_flags.h" #ifndef TASK_COMM_LEN # define TASK_COMM_LEN 16 #endif #ifdef HAVE_LINUX_SECCOMP_H # include #endif #include "xlat/seccomp_mode.h" #ifdef HAVE_LINUX_SECUREBITS_H # include #endif #include "xlat/secbits.h" /* these constants are the same as in */ enum { #include "caps0.h" #include "caps1.h" }; #include "xlat/cap.h" static void print_prctl_args(struct tcb *tcp, const unsigned int first) { unsigned int i; for (i = first; i < tcp->s_ent->nargs; ++i) tprintf(", %#llx", getarg_ull(tcp, i)); } SYS_FUNC(prctl) { const unsigned int option = tcp->u_arg[0]; const unsigned long long arg2 = getarg_ull(tcp, 1); const unsigned long long arg3 = getarg_ull(tcp, 2); /* * PR_SET_VMA is the only command which actually uses these arguments * currently, and it is available only on Android for now. */ #ifdef __ANDROID__ const unsigned long long arg4 = getarg_ull(tcp, 3); const unsigned long long arg5 = getarg_ull(tcp, 4); #endif unsigned int i; if (entering(tcp)) printxval(prctl_options, option, "PR_???"); switch (option) { case PR_GET_DUMPABLE: case PR_GET_KEEPCAPS: case PR_GET_SECCOMP: case PR_GET_TIMERSLACK: case PR_GET_TIMING: return RVAL_DECODED; case PR_GET_CHILD_SUBREAPER: case PR_GET_ENDIAN: case PR_GET_FPEMU: case PR_GET_FPEXC: if (entering(tcp)) tprints(", "); else printnum_int(tcp, arg2, "%u"); break; case PR_GET_NAME: if (entering(tcp)) { tprints(", "); } else { if (syserror(tcp)) printaddr(arg2); else printstr_ex(tcp, arg2, TASK_COMM_LEN, QUOTE_0_TERMINATED); } break; case PR_GET_PDEATHSIG: if (entering(tcp)) { tprints(", "); } else if (!umove_or_printaddr(tcp, arg2, &i)) { tprints("["); tprints(signame(i)); tprints("]"); } break; case PR_GET_SECUREBITS: if (entering(tcp)) break; if (syserror(tcp) || tcp->u_rval == 0) return 0; tcp->auxstr = sprintflags("", secbits, (unsigned long) tcp->u_rval); return RVAL_STR; case PR_GET_TID_ADDRESS: if (entering(tcp)) tprints(", "); else printnum_ptr(tcp, arg2); break; case PR_GET_TSC: if (entering(tcp)) { tprints(", "); } else if (!umove_or_printaddr(tcp, arg2, &i)) { tprints("["); printxval(pr_tsc, i, "PR_TSC_???"); tprints("]"); } break; case PR_GET_UNALIGN: if (entering(tcp)) { tprints(", "); } else if (!umove_or_printaddr(tcp, arg2, &i)) { tprints("["); printflags(pr_unalign_flags, i, "PR_UNALIGN_???"); tprints("]"); } break; case PR_GET_FP_MODE: if (entering(tcp)) break; if (syserror(tcp) || tcp->u_rval == 0) return 0; tcp->auxstr = sprintflags("", pr_fp_mode, (unsigned long) tcp->u_rval); return RVAL_STR; /* PR_TASK_PERF_EVENTS_* take no arguments. */ case PR_TASK_PERF_EVENTS_DISABLE: case PR_TASK_PERF_EVENTS_ENABLE: return RVAL_DECODED; case PR_SET_CHILD_SUBREAPER: case PR_SET_DUMPABLE: case PR_SET_ENDIAN: case PR_SET_FPEMU: case PR_SET_FPEXC: case PR_SET_KEEPCAPS: case PR_SET_TIMING: tprintf(", %llu", arg2); return RVAL_DECODED; case PR_CAPBSET_DROP: case PR_CAPBSET_READ: tprints(", "); printxval64(cap, arg2, "CAP_???"); return RVAL_DECODED; case PR_CAP_AMBIENT: tprints(", "); printxval64(pr_cap_ambient, arg2, "PR_CAP_AMBIENT_???"); switch (arg2) { case PR_CAP_AMBIENT_RAISE: case PR_CAP_AMBIENT_LOWER: case PR_CAP_AMBIENT_IS_SET: tprints(", "); printxval64(cap, arg3, "CAP_???"); print_prctl_args(tcp, 3); break; default: print_prctl_args(tcp, 2); break; } return RVAL_DECODED; case PR_MCE_KILL: tprints(", "); printxval64(pr_mce_kill, arg2, "PR_MCE_KILL_???"); tprints(", "); if (PR_MCE_KILL_SET == arg2) printxval64(pr_mce_kill_policy, arg3, "PR_MCE_KILL_???"); else tprintf("%#llx", arg3); print_prctl_args(tcp, 3); return RVAL_DECODED; case PR_SET_NAME: tprints(", "); printstr_ex(tcp, arg2, TASK_COMM_LEN - 1, QUOTE_0_TERMINATED); return RVAL_DECODED; #ifdef __ANDROID__ # ifndef PR_SET_VMA_ANON_NAME # define PR_SET_VMA_ANON_NAME 0 # endif case PR_SET_VMA: if (arg2 == PR_SET_VMA_ANON_NAME) { tprintf(", PR_SET_VMA_ANON_NAME, %#llx", arg3); tprintf(", %llu, ", arg4); printstr(tcp, arg5, -1); } else { /* There are no other sub-options now, but there * might be in future... */ print_prctl_args(tcp, 1); } return RVAL_DECODED; #endif case PR_SET_MM: tprints(", "); printxval(pr_set_mm, arg2, "PR_SET_MM_???"); print_prctl_args(tcp, 2); return RVAL_DECODED; case PR_SET_PDEATHSIG: tprints(", "); if (arg2 > 128) tprintf("%llu", arg2); else tprints(signame(arg2)); return RVAL_DECODED; case PR_SET_PTRACER: tprints(", "); if ((int) arg2 == -1) tprints("PR_SET_PTRACER_ANY"); else tprintf("%llu", arg2); return RVAL_DECODED; case PR_SET_SECCOMP: tprints(", "); printxval64(seccomp_mode, arg2, "SECCOMP_MODE_???"); if (SECCOMP_MODE_STRICT == arg2) return RVAL_DECODED; if (SECCOMP_MODE_FILTER == arg2) { tprints(", "); print_seccomp_filter(tcp, arg3); return RVAL_DECODED; } print_prctl_args(tcp, 2); return RVAL_DECODED; case PR_SET_SECUREBITS: tprints(", "); printflags64(secbits, arg2, "SECBIT_???"); return RVAL_DECODED; case PR_SET_TIMERSLACK: tprintf(", %lld", arg2); return RVAL_DECODED; case PR_SET_TSC: tprints(", "); printxval(pr_tsc, arg2, "PR_TSC_???"); return RVAL_DECODED; case PR_SET_UNALIGN: tprints(", "); printflags(pr_unalign_flags, arg2, "PR_UNALIGN_???"); return RVAL_DECODED; case PR_SET_NO_NEW_PRIVS: case PR_SET_THP_DISABLE: tprintf(", %llu", arg2); print_prctl_args(tcp, 2); return RVAL_DECODED; case PR_MCE_KILL_GET: if (entering(tcp)) { print_prctl_args(tcp, 1); return 0; } if (syserror(tcp)) return 0; tcp->auxstr = xlookup(pr_mce_kill_policy, (unsigned long) tcp->u_rval); return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL; case PR_SET_FP_MODE: tprints(", "); printflags(pr_fp_mode, arg2, "PR_FP_MODE_???"); return RVAL_DECODED; case PR_GET_NO_NEW_PRIVS: case PR_GET_THP_DISABLE: case PR_MPX_DISABLE_MANAGEMENT: case PR_MPX_ENABLE_MANAGEMENT: default: print_prctl_args(tcp, 1); return RVAL_DECODED; } return 0; } #if defined X86_64 || defined X32 # include # include "xlat/archvals.h" SYS_FUNC(arch_prctl) { const unsigned int option = tcp->u_arg[0]; const unsigned long long addr = getarg_ull(tcp, 1); if (entering(tcp)) printxval(archvals, option, "ARCH_???"); switch (option) { case ARCH_GET_GS: case ARCH_GET_FS: if (entering(tcp)) tprints(", "); else printnum_ptr(tcp, addr); return 0; } tprintf(", %#llx", addr); return RVAL_DECODED; } #endif /* X86_64 || X32 */