fd02ce4ff8
* defs.h (seccomp_filter_flags): New declaration. * process.c (SYS_FUNC(ptrace)): Implement PTRACE_SECCOMP_GET_METADATA request decoding. * ptrace.h [!PTRACE_SECCOMP_GET_METADATA] (PTRACE_SECCOMP_GET_METADATA): New macro constant. * xlat/ptrace_cmds.in (PTRACE_SECCOMP_GET_METADATA): New constant. * tests/ptrace.c (main): Add some checks for PTRACE_SECCOMP_GET_METADATA request decoding. * NEWS: Mention it. Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
302 lines
7.6 KiB
C
302 lines
7.6 KiB
C
/*
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* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
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* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
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* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
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* Linux for s390 port by D.J. Barrow
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* <barrow_dj@mail.yahoo.com,djbarrow@de.ibm.com>
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* Copyright (c) 2000 PocketPenguins Inc. Linux for Hitachi SuperH
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* port by Greg Banks <gbanks@pocketpenguins.com>
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* Copyright (c) 1999-2018 The strace developers.
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*
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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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#ifdef HAVE_ELF_H
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# include <elf.h>
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#endif
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#include "ptrace.h"
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#include "regs.h"
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#include "xlat/nt_descriptor_types.h"
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#include "xlat/ptrace_cmds.h"
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#include "xlat/ptrace_setoptions_flags.h"
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#include "xlat/ptrace_peeksiginfo_flags.h"
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#define uoff(member) offsetof(struct user, member)
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#define XLAT_UOFF(member) { uoff(member), "offsetof(struct user, " #member ")" }
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static const struct xlat struct_user_offsets[] = {
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#include "userent.h"
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XLAT_END
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};
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static void
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print_user_offset_addr(const kernel_ulong_t addr)
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{
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const struct xlat *x;
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for (x = struct_user_offsets; x->str; ++x) {
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if (x->val >= addr)
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break;
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}
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if (!x->str) {
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printaddr(addr);
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} else if (x->val > addr) {
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if (x == struct_user_offsets) {
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printaddr(addr);
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} else {
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--x;
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tprintf("%s + %" PRI_klu,
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x->str, addr - (kernel_ulong_t) x->val);
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}
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} else {
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tprints(x->str);
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}
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}
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SYS_FUNC(ptrace)
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{
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const kernel_ulong_t request = tcp->u_arg[0];
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const int pid = tcp->u_arg[1];
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const kernel_ulong_t addr = tcp->u_arg[2];
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const kernel_ulong_t data = tcp->u_arg[3];
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if (entering(tcp)) {
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/* request */
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printxval64(ptrace_cmds, request, "PTRACE_???");
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if (request == PTRACE_TRACEME) {
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/* pid, addr, and data are ignored. */
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return RVAL_DECODED;
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}
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/* pid */
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tprintf(", %d", pid);
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/* addr */
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switch (request) {
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case PTRACE_ATTACH:
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case PTRACE_INTERRUPT:
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case PTRACE_KILL:
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case PTRACE_LISTEN:
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/* addr and data are ignored */
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return RVAL_DECODED;
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case PTRACE_PEEKUSER:
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case PTRACE_POKEUSER:
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tprints(", ");
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print_user_offset_addr(addr);
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break;
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case PTRACE_GETREGSET:
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case PTRACE_SETREGSET:
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tprints(", ");
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printxval(nt_descriptor_types, addr, "NT_???");
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break;
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case PTRACE_GETSIGMASK:
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case PTRACE_SETSIGMASK:
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case PTRACE_SECCOMP_GET_FILTER:
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case PTRACE_SECCOMP_GET_METADATA:
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tprintf(", %" PRI_klu, addr);
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break;
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case PTRACE_PEEKSIGINFO: {
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tprints(", ");
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struct {
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uint64_t off;
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uint32_t flags;
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uint32_t nr;
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} psi;
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if (umove_or_printaddr(tcp, addr, &psi)) {
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tprints(", ");
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printaddr(data);
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return RVAL_DECODED;
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}
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tprintf("{off=%" PRIu64 ", flags=", psi.off);
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printflags(ptrace_peeksiginfo_flags, psi.flags,
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"PTRACE_PEEKSIGINFO_???");
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tprintf(", nr=%u}", psi.nr);
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break;
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}
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default:
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tprints(", ");
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printaddr(addr);
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}
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# if defined IA64 || defined SPARC || defined SPARC64
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switch (request) {
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# ifdef IA64
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case PTRACE_PEEKDATA:
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case PTRACE_PEEKTEXT:
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case PTRACE_PEEKUSER:
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/* data is ignored */
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return RVAL_DECODED | RVAL_HEX;
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# endif /* IA64 */
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# if defined SPARC || defined SPARC64
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case PTRACE_GETREGS:
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case PTRACE_SETREGS:
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case PTRACE_GETFPREGS:
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case PTRACE_SETFPREGS:
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/* data is ignored */
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return RVAL_DECODED;
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# endif /* SPARC || SPARC64 */
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}
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# endif /* IA64 || SPARC || SPARC64 */
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tprints(", ");
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/* data */
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switch (request) {
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case PTRACE_CONT:
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case PTRACE_DETACH:
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case PTRACE_SYSCALL:
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#ifdef PTRACE_SINGLESTEP
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case PTRACE_SINGLESTEP:
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#endif
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#ifdef PTRACE_SINGLEBLOCK
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case PTRACE_SINGLEBLOCK:
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#endif
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#ifdef PTRACE_SYSEMU
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case PTRACE_SYSEMU:
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#endif
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#ifdef PTRACE_SYSEMU_SINGLESTEP
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case PTRACE_SYSEMU_SINGLESTEP:
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#endif
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printsignal(data);
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break;
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case PTRACE_SEIZE:
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case PTRACE_SETOPTIONS:
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#ifdef PTRACE_OLDSETOPTIONS
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case PTRACE_OLDSETOPTIONS:
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#endif
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printflags64(ptrace_setoptions_flags, data, "PTRACE_O_???");
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break;
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case PTRACE_SETSIGINFO:
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printsiginfo_at(tcp, data);
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break;
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case PTRACE_SETSIGMASK:
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print_sigset_addr_len(tcp, data, addr);
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break;
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case PTRACE_SETREGSET:
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tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR);
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break;
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case PTRACE_SECCOMP_GET_METADATA:
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if (verbose(tcp)) {
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uint64_t filter_off;
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if (addr < sizeof(filter_off) ||
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umove(tcp, data, &filter_off)) {
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printaddr(data);
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return RVAL_DECODED;
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}
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tprintf("{filter_off=%" PRIu64, filter_off);
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return 0;
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}
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printaddr(data);
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break;
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#ifndef IA64
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case PTRACE_PEEKDATA:
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case PTRACE_PEEKTEXT:
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case PTRACE_PEEKUSER:
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#endif
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case PTRACE_GETEVENTMSG:
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case PTRACE_GETREGSET:
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case PTRACE_GETSIGINFO:
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case PTRACE_GETSIGMASK:
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case PTRACE_PEEKSIGINFO:
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case PTRACE_SECCOMP_GET_FILTER:
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if (verbose(tcp)) {
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/* print data on exiting syscall */
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return 0;
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}
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ATTRIBUTE_FALLTHROUGH;
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default:
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printaddr(data);
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break;
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}
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return RVAL_DECODED;
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} else {
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switch (request) {
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#ifndef IA64
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case PTRACE_PEEKDATA:
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case PTRACE_PEEKTEXT:
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case PTRACE_PEEKUSER:
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printnum_ptr(tcp, data);
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break;
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#endif
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case PTRACE_GETEVENTMSG:
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printnum_ulong(tcp, data);
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break;
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case PTRACE_GETREGSET:
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tprint_iov(tcp, /*len:*/ 1, data, IOV_DECODE_ADDR);
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break;
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case PTRACE_GETSIGINFO:
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printsiginfo_at(tcp, data);
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break;
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case PTRACE_GETSIGMASK:
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print_sigset_addr_len(tcp, data, addr);
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break;
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case PTRACE_PEEKSIGINFO:
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print_siginfo_array(tcp, data, tcp->u_rval);
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break;
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case PTRACE_SECCOMP_GET_FILTER:
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print_seccomp_fprog(tcp, data, tcp->u_rval);
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break;
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case PTRACE_SECCOMP_GET_METADATA: {
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const size_t offset = sizeof(uint64_t);
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uint64_t flags = 0;
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size_t ret_size = MIN((kernel_ulong_t) tcp->u_rval,
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offset + sizeof(flags));
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if (syserror(tcp) || ret_size <= offset) {
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tprints("}");
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return 0;
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}
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if (umoven(tcp, data + offset, ret_size - offset,
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&flags)) {
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tprints(", ...}");
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return 0;
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}
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tprints(", flags=");
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printflags64(seccomp_filter_flags, flags,
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"SECCOMP_FILTER_FLAG_???");
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if ((kernel_ulong_t) tcp->u_rval > ret_size)
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tprints(", ...");
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tprints("}");
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}
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}
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}
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return 0;
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}
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