/* * 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 * Copyright (c) 2014-2018 The strace developers. * 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 "xstring.h" #include "xlat/prctl_options.h" #include "xlat/pr_cap_ambient.h" #include "xlat/pr_dumpable.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_spec_cmds.h" #include "xlat/pr_spec_get_store_bypass_flags.h" #include "xlat/pr_spec_set_store_bypass_flags.h" #include "xlat/pr_sve_vl_flags.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" #ifndef PR_SVE_VL_LEN_MASK # define PR_SVE_VL_LEN_MASK 0xffff #endif 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(", %#" PRI_klx, tcp->u_arg[i]); } static char * sprint_sve_val(kernel_ulong_t arg) { static char out[sizeof("PR_SVE_SET_VL_ONEXEC|PR_SVE_VL_INHERIT|0x") + sizeof(kernel_ulong_t) * 2]; kernel_ulong_t vl = arg & PR_SVE_VL_LEN_MASK; kernel_ulong_t flags = arg & ~PR_SVE_VL_LEN_MASK; const char *flags_str = sprintflags("", pr_sve_vl_flags, flags); xsprintf(out, "%s%s%#" PRI_klx, flags_str ?: "", flags_str ? "|" : "", vl); return out; } SYS_FUNC(prctl) { const unsigned int option = tcp->u_arg[0]; const kernel_ulong_t arg2 = tcp->u_arg[1]; const kernel_ulong_t arg3 = tcp->u_arg[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 kernel_ulong_t arg4 = tcp->u_arg[3]; const kernel_ulong_t arg5 = tcp->u_arg[4]; #endif unsigned int i; if (entering(tcp)) printxval(prctl_options, option, "PR_???"); switch (option) { 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_DUMPABLE: if (entering(tcp)) break; if (syserror(tcp)) return 0; tcp->auxstr = xlookup(pr_dumpable, (kernel_ulong_t) tcp->u_rval); return RVAL_STR; 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, (kernel_ulong_t) tcp->u_rval); return RVAL_STR; case PR_GET_TID_ADDRESS: if (entering(tcp)) tprints(", "); else printnum_kptr(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, (kernel_ulong_t) tcp->u_rval); return RVAL_STR; case PR_SVE_SET_VL: if (entering(tcp)) { tprintf(", %s", sprint_sve_val(arg2)); return 0; } ATTRIBUTE_FALLTHROUGH; case PR_SVE_GET_VL: if (entering(tcp)) break; if (syserror(tcp) || tcp->u_rval == 0) return 0; tcp->auxstr = sprint_sve_val(tcp->u_rval); return RVAL_STR; case PR_GET_SPECULATION_CTRL: if (entering(tcp)) { tprints(", "); printxval64(pr_spec_cmds, arg2, "PR_SPEC_???"); break; } if (syserror(tcp)) return 0; switch (arg2) { case PR_SPEC_STORE_BYPASS: tcp->auxstr = sprintflags("", pr_spec_get_store_bypass_flags, (kernel_ulong_t) tcp->u_rval); break; } 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_ENDIAN: case PR_SET_FPEMU: case PR_SET_FPEXC: case PR_SET_KEEPCAPS: case PR_SET_TIMING: tprintf(", %" PRI_klu, arg2); return RVAL_DECODED; case PR_SET_DUMPABLE: tprints(", "); printxval64(pr_dumpable, arg2, "SUID_DUMP_???"); 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("%#" PRI_klx, 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, %#" PRI_klx, arg3); tprintf(", %" PRI_klu ", ", arg4); printstr(tcp, arg5); } 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("%" PRI_klu, arg2); else tprints(signame(arg2)); return RVAL_DECODED; case PR_SET_PTRACER: tprints(", "); if ((int) arg2 == -1) { print_xlat_ex(arg2, "PR_SET_PTRACER_ANY", XLAT_STYLE_DEFAULT); } else { tprintf("%" PRI_klu, 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(", "); decode_seccomp_fprog(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(", %" PRI_kld, 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(", %" PRI_klu, 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, (kernel_ulong_t) tcp->u_rval); return RVAL_STR; case PR_SET_FP_MODE: tprints(", "); printflags(pr_fp_mode, arg2, "PR_FP_MODE_???"); return RVAL_DECODED; case PR_SET_SPECULATION_CTRL: tprints(", "); printxval64(pr_spec_cmds, arg2, "PR_SPEC_???"); tprints(", "); switch (arg2) { case PR_SPEC_STORE_BYPASS: printxval64(pr_spec_set_store_bypass_flags, arg3, "PR_SPEC_???"); break; default: tprintf("%#" PRI_klx, arg3); } 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 || defined I386 # include "xlat/archvals.h" SYS_FUNC(arch_prctl) { const unsigned int option = tcp->u_arg[0]; const kernel_ulong_t addr = tcp->u_arg[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(", %#" PRI_klx, addr); return RVAL_DECODED; } #endif /* X86_64 || X32 || I386 */