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378 lines
8.9 KiB
378 lines
8.9 KiB
/* |
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* Copyright (c) 1994-1996 Rick Sladkey <jrs@world.std.com> |
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* Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl> |
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* Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com> |
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* Copyright (c) 2008-2015 Dmitry V. Levin <ldv@altlinux.org> |
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* Copyright (c) 2014-2017 The strace developers. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. The name of the author may not be used to endorse or promote products |
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* derived from this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include "defs.h" |
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#include <linux/prctl.h> |
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#include "xlat/prctl_options.h" |
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#include "xlat/pr_cap_ambient.h" |
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#include "xlat/pr_dumpable.h" |
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#include "xlat/pr_fp_mode.h" |
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#include "xlat/pr_mce_kill.h" |
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#include "xlat/pr_mce_kill_policy.h" |
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#include "xlat/pr_set_mm.h" |
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#include "xlat/pr_tsc.h" |
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#include "xlat/pr_unalign_flags.h" |
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#ifndef TASK_COMM_LEN |
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# define TASK_COMM_LEN 16 |
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#endif |
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#ifdef HAVE_LINUX_SECCOMP_H |
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# include <linux/seccomp.h> |
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#endif |
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#include "xlat/seccomp_mode.h" |
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#ifdef HAVE_LINUX_SECUREBITS_H |
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# include <linux/securebits.h> |
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#endif |
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#include "xlat/secbits.h" |
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/* these constants are the same as in <linux/capability.h> */ |
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enum { |
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#include "caps0.h" |
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#include "caps1.h" |
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}; |
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#include "xlat/cap.h" |
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static void |
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print_prctl_args(struct tcb *tcp, const unsigned int first) |
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{ |
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unsigned int i; |
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for (i = first; i < tcp->s_ent->nargs; ++i) |
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tprintf(", %#" PRI_klx, tcp->u_arg[i]); |
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} |
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SYS_FUNC(prctl) |
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{ |
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const unsigned int option = tcp->u_arg[0]; |
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const kernel_ulong_t arg2 = tcp->u_arg[1]; |
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const kernel_ulong_t arg3 = tcp->u_arg[2]; |
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/* |
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* PR_SET_VMA is the only command which actually uses these arguments |
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* currently, and it is available only on Android for now. |
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*/ |
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#ifdef __ANDROID__ |
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const kernel_ulong_t arg4 = tcp->u_arg[3]; |
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const kernel_ulong_t arg5 = tcp->u_arg[4]; |
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#endif |
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unsigned int i; |
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if (entering(tcp)) |
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printxval(prctl_options, option, "PR_???"); |
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switch (option) { |
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case PR_GET_KEEPCAPS: |
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case PR_GET_SECCOMP: |
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case PR_GET_TIMERSLACK: |
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case PR_GET_TIMING: |
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return RVAL_DECODED; |
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case PR_GET_CHILD_SUBREAPER: |
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case PR_GET_ENDIAN: |
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case PR_GET_FPEMU: |
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case PR_GET_FPEXC: |
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if (entering(tcp)) |
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tprints(", "); |
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else |
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printnum_int(tcp, arg2, "%u"); |
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break; |
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case PR_GET_DUMPABLE: |
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if (entering(tcp)) |
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break; |
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if (syserror(tcp)) |
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return 0; |
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tcp->auxstr = xlookup(pr_dumpable, (kernel_ulong_t) tcp->u_rval); |
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return RVAL_STR; |
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case PR_GET_NAME: |
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if (entering(tcp)) { |
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tprints(", "); |
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} else { |
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if (syserror(tcp)) |
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printaddr(arg2); |
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else |
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printstr_ex(tcp, arg2, TASK_COMM_LEN, |
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QUOTE_0_TERMINATED); |
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} |
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break; |
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case PR_GET_PDEATHSIG: |
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if (entering(tcp)) { |
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tprints(", "); |
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} else if (!umove_or_printaddr(tcp, arg2, &i)) { |
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tprints("["); |
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tprints(signame(i)); |
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tprints("]"); |
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} |
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break; |
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case PR_GET_SECUREBITS: |
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if (entering(tcp)) |
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break; |
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if (syserror(tcp) || tcp->u_rval == 0) |
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return 0; |
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tcp->auxstr = sprintflags("", secbits, |
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(kernel_ulong_t) tcp->u_rval); |
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return RVAL_STR; |
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case PR_GET_TID_ADDRESS: |
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if (entering(tcp)) |
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tprints(", "); |
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else |
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printnum_kptr(tcp, arg2); |
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break; |
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case PR_GET_TSC: |
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if (entering(tcp)) { |
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tprints(", "); |
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} else if (!umove_or_printaddr(tcp, arg2, &i)) { |
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tprints("["); |
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printxval(pr_tsc, i, "PR_TSC_???"); |
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tprints("]"); |
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} |
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break; |
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case PR_GET_UNALIGN: |
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if (entering(tcp)) { |
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tprints(", "); |
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} else if (!umove_or_printaddr(tcp, arg2, &i)) { |
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tprints("["); |
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printflags(pr_unalign_flags, i, "PR_UNALIGN_???"); |
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tprints("]"); |
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} |
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break; |
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case PR_GET_FP_MODE: |
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if (entering(tcp)) |
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break; |
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if (syserror(tcp) || tcp->u_rval == 0) |
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return 0; |
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tcp->auxstr = sprintflags("", pr_fp_mode, |
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(kernel_ulong_t) tcp->u_rval); |
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return RVAL_STR; |
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/* PR_TASK_PERF_EVENTS_* take no arguments. */ |
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case PR_TASK_PERF_EVENTS_DISABLE: |
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case PR_TASK_PERF_EVENTS_ENABLE: |
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return RVAL_DECODED; |
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case PR_SET_CHILD_SUBREAPER: |
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case PR_SET_ENDIAN: |
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case PR_SET_FPEMU: |
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case PR_SET_FPEXC: |
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case PR_SET_KEEPCAPS: |
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case PR_SET_TIMING: |
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tprintf(", %" PRI_klu, arg2); |
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return RVAL_DECODED; |
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case PR_SET_DUMPABLE: |
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tprints(", "); |
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printxval64(pr_dumpable, arg2, "SUID_DUMP_???"); |
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return RVAL_DECODED; |
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case PR_CAPBSET_DROP: |
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case PR_CAPBSET_READ: |
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tprints(", "); |
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printxval64(cap, arg2, "CAP_???"); |
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return RVAL_DECODED; |
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case PR_CAP_AMBIENT: |
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tprints(", "); |
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printxval64(pr_cap_ambient, arg2, |
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"PR_CAP_AMBIENT_???"); |
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switch (arg2) { |
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case PR_CAP_AMBIENT_RAISE: |
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case PR_CAP_AMBIENT_LOWER: |
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case PR_CAP_AMBIENT_IS_SET: |
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tprints(", "); |
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printxval64(cap, arg3, "CAP_???"); |
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print_prctl_args(tcp, 3); |
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break; |
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default: |
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print_prctl_args(tcp, 2); |
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break; |
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} |
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return RVAL_DECODED; |
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case PR_MCE_KILL: |
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tprints(", "); |
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printxval64(pr_mce_kill, arg2, "PR_MCE_KILL_???"); |
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tprints(", "); |
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if (PR_MCE_KILL_SET == arg2) |
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printxval64(pr_mce_kill_policy, arg3, |
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"PR_MCE_KILL_???"); |
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else |
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tprintf("%#" PRI_klx, arg3); |
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print_prctl_args(tcp, 3); |
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return RVAL_DECODED; |
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case PR_SET_NAME: |
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tprints(", "); |
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printstr_ex(tcp, arg2, TASK_COMM_LEN - 1, |
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QUOTE_0_TERMINATED); |
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return RVAL_DECODED; |
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#ifdef __ANDROID__ |
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# ifndef PR_SET_VMA_ANON_NAME |
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# define PR_SET_VMA_ANON_NAME 0 |
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# endif |
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case PR_SET_VMA: |
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if (arg2 == PR_SET_VMA_ANON_NAME) { |
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tprintf(", PR_SET_VMA_ANON_NAME, %#" PRI_klx, arg3); |
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tprintf(", %" PRI_klu ", ", arg4); |
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printstr(tcp, arg5); |
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} else { |
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/* There are no other sub-options now, but there |
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* might be in future... */ |
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print_prctl_args(tcp, 1); |
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} |
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return RVAL_DECODED; |
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#endif |
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case PR_SET_MM: |
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tprints(", "); |
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printxval(pr_set_mm, arg2, "PR_SET_MM_???"); |
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print_prctl_args(tcp, 2); |
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return RVAL_DECODED; |
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case PR_SET_PDEATHSIG: |
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tprints(", "); |
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if (arg2 > 128) |
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tprintf("%" PRI_klu, arg2); |
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else |
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tprints(signame(arg2)); |
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return RVAL_DECODED; |
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case PR_SET_PTRACER: |
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tprints(", "); |
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if ((int) arg2 == -1) |
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tprints("PR_SET_PTRACER_ANY"); |
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else |
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tprintf("%" PRI_klu, arg2); |
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return RVAL_DECODED; |
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case PR_SET_SECCOMP: |
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tprints(", "); |
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printxval64(seccomp_mode, arg2, |
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"SECCOMP_MODE_???"); |
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if (SECCOMP_MODE_STRICT == arg2) |
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return RVAL_DECODED; |
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if (SECCOMP_MODE_FILTER == arg2) { |
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tprints(", "); |
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print_seccomp_filter(tcp, arg3); |
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return RVAL_DECODED; |
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} |
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print_prctl_args(tcp, 2); |
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return RVAL_DECODED; |
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case PR_SET_SECUREBITS: |
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tprints(", "); |
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printflags64(secbits, arg2, "SECBIT_???"); |
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return RVAL_DECODED; |
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case PR_SET_TIMERSLACK: |
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tprintf(", %" PRI_kld, arg2); |
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return RVAL_DECODED; |
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case PR_SET_TSC: |
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tprints(", "); |
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printxval(pr_tsc, arg2, "PR_TSC_???"); |
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return RVAL_DECODED; |
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case PR_SET_UNALIGN: |
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tprints(", "); |
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printflags(pr_unalign_flags, arg2, "PR_UNALIGN_???"); |
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return RVAL_DECODED; |
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case PR_SET_NO_NEW_PRIVS: |
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case PR_SET_THP_DISABLE: |
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tprintf(", %" PRI_klu, arg2); |
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print_prctl_args(tcp, 2); |
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return RVAL_DECODED; |
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case PR_MCE_KILL_GET: |
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if (entering(tcp)) { |
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print_prctl_args(tcp, 1); |
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return 0; |
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} |
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if (syserror(tcp)) |
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return 0; |
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tcp->auxstr = xlookup(pr_mce_kill_policy, |
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(kernel_ulong_t) tcp->u_rval); |
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return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL; |
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case PR_SET_FP_MODE: |
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tprints(", "); |
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printflags(pr_fp_mode, arg2, "PR_FP_MODE_???"); |
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return RVAL_DECODED; |
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case PR_GET_NO_NEW_PRIVS: |
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case PR_GET_THP_DISABLE: |
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case PR_MPX_DISABLE_MANAGEMENT: |
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case PR_MPX_ENABLE_MANAGEMENT: |
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default: |
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print_prctl_args(tcp, 1); |
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return RVAL_DECODED; |
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} |
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return 0; |
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} |
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#if defined X86_64 || defined X32 |
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# include <asm/prctl.h> |
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# include "xlat/archvals.h" |
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SYS_FUNC(arch_prctl) |
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{ |
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const unsigned int option = tcp->u_arg[0]; |
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const kernel_ulong_t addr = tcp->u_arg[1]; |
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if (entering(tcp)) |
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printxval(archvals, option, "ARCH_???"); |
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switch (option) { |
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case ARCH_GET_GS: |
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case ARCH_GET_FS: |
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if (entering(tcp)) |
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tprints(", "); |
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else |
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printnum_ptr(tcp, addr); |
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return 0; |
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} |
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tprintf(", %#" PRI_klx, addr); |
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return RVAL_DECODED; |
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} |
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#endif /* X86_64 || X32 */
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