b3f92b39f1
As the former respects xlat styles while the latter doesn't. * clone.c (SYS_FUNC(clone)): Use printsignal for printing termination signal in printflags. * fcntl.c (print_fcntl) <case F_SETSIG>: Use printsignal. * prctl.c (SYS_FUNC(prctl)) <case PR_GET_PDEATHSIG, case PR_SET_PDEATHSIG>: Likewise. * print_sigevent.c (print_sigevent): Likewise. * s390.c (s390_runtime_instr): Likewise. * signal.c (SYS_FUNC(kill), SYS_FUNC(tgkill)): Likewise.
148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
/*
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* Copyright (c) 1999-2000 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2002-2005 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2008 Jan Kratochvil <jan.kratochvil@redhat.com>
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* Copyright (c) 2009-2013 Denys Vlasenko <dvlasenk@redhat.com>
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* Copyright (c) 2006-2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2014-2018 The strace developers.
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* All rights reserved.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#include "defs.h"
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#include <sched.h>
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#include <asm/unistd.h>
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#ifndef CSIGNAL
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# define CSIGNAL 0x000000ff
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#endif
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#include "xlat/clone_flags.h"
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#include "xlat/setns_types.h"
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#include "xlat/unshare_flags.h"
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#if defined IA64
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# define ARG_FLAGS 0
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# define ARG_STACK 1
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# define ARG_STACKSIZE (tcp->scno == __NR_clone2 ? 2 : -1)
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# define ARG_PTID (tcp->scno == __NR_clone2 ? 3 : 2)
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# define ARG_CTID (tcp->scno == __NR_clone2 ? 4 : 3)
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# define ARG_TLS (tcp->scno == __NR_clone2 ? 5 : 4)
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#elif defined S390 || defined S390X
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# define ARG_STACK 0
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# define ARG_FLAGS 1
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# define ARG_PTID 2
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# define ARG_CTID 3
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# define ARG_TLS 4
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#elif defined X86_64 || defined X32
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/* x86 personality processes have the last two arguments flipped. */
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# define ARG_FLAGS 0
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# define ARG_STACK 1
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# define ARG_PTID 2
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# define ARG_CTID ((current_personality != 1) ? 3 : 4)
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# define ARG_TLS ((current_personality != 1) ? 4 : 3)
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#elif defined ALPHA || defined TILE || defined OR1K || defined RISCV
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# define ARG_FLAGS 0
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# define ARG_STACK 1
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# define ARG_PTID 2
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# define ARG_CTID 3
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# define ARG_TLS 4
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#else
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# define ARG_FLAGS 0
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# define ARG_STACK 1
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# define ARG_PTID 2
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# define ARG_TLS 3
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# define ARG_CTID 4
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#endif
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static void
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print_tls_arg(struct tcb *const tcp, const kernel_ulong_t addr)
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{
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#ifdef HAVE_STRUCT_USER_DESC
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# if SUPPORTED_PERSONALITIES > 1
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if (current_personality == 1)
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# endif
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{
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print_user_desc(tcp, tcp->u_arg[ARG_TLS], USER_DESC_BOTH);
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}
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# if SUPPORTED_PERSONALITIES > 1
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else
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# endif
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#endif /* HAVE_STRUCT_USER_DESC */
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{
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printaddr(tcp->u_arg[ARG_TLS]);
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}
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}
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SYS_FUNC(clone)
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{
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if (exiting(tcp)) {
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const char *sep = "|";
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kernel_ulong_t flags = tcp->u_arg[ARG_FLAGS];
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tprints("child_stack=");
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printaddr(tcp->u_arg[ARG_STACK]);
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tprints(", ");
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#ifdef ARG_STACKSIZE
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if (ARG_STACKSIZE != -1)
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tprintf("stack_size=%#" PRI_klx ", ",
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tcp->u_arg[ARG_STACKSIZE]);
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#endif
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tprints("flags=");
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if (!printflags64(clone_flags, flags & ~CSIGNAL, NULL))
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sep = "";
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if ((flags & CSIGNAL) != 0) {
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tprints(sep);
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printsignal(flags & CSIGNAL);
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}
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if ((flags & (CLONE_PARENT_SETTID|CLONE_CHILD_SETTID
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|CLONE_CHILD_CLEARTID|CLONE_SETTLS)) == 0)
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return 0;
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if (flags & CLONE_PARENT_SETTID) {
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tprints(", parent_tidptr=");
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printaddr(tcp->u_arg[ARG_PTID]);
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}
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if (flags & CLONE_SETTLS) {
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tprints(", tls=");
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print_tls_arg(tcp, tcp->u_arg[ARG_TLS]);
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}
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if (flags & (CLONE_CHILD_SETTID|CLONE_CHILD_CLEARTID)) {
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tprints(", child_tidptr=");
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printaddr(tcp->u_arg[ARG_CTID]);
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}
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}
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/* TODO on syscall entry:
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* We can clear CLONE_PTRACE here since it is an ancient hack
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* to allow us to catch children, and we use another hack for that.
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* But CLONE_PTRACE can conceivably be used by malicious programs
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* to subvert us. By clearing this bit, we can defend against it:
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* in untraced execution, CLONE_PTRACE should have no effect.
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*
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* We can also clear CLONE_UNTRACED, since it allows to start
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* children outside of our control. At the moment
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* I'm trying to figure out whether there is a *legitimate*
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* use of this flag which we should respect.
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*/
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return 0;
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}
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SYS_FUNC(setns)
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{
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printfd(tcp, tcp->u_arg[0]);
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tprints(", ");
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printxval(setns_types, tcp->u_arg[1], "CLONE_NEW???");
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return RVAL_DECODED;
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}
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SYS_FUNC(unshare)
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{
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printflags64(unshare_flags, tcp->u_arg[0], "CLONE_???");
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return RVAL_DECODED;
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}
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SYS_FUNC(fork)
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{
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return RVAL_DECODED;
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}
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