Dmitry V. Levin
93c9d1cdbd
* defs.h (dumpiov_in_msghdr): Add unsigned long argument. * net.c (dumpiov_in_msghdr): Add data_size argument. Call dumpiov_upto instead of dumpiov, pass data_size to dumpiov_upto. * syscall.c (dumpio): Pass data size limit to dumpiov_in_msghdr. * NEWS: Mention this fix. * tests/recvmsg.c: New file. * tests/recvmsg.test: New test. * tests/Makefile.am (check_PROGRAMS): Add recvmsg. (TESTS): Add recvmsg.test. * tests/.gitignore: Add recvmsg.
1363 lines
32 KiB
C
1363 lines
32 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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* 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 "native_defs.h"
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#include <sys/param.h>
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#include <signal.h>
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/* for struct iovec */
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#include <sys/uio.h>
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#include "regs.h"
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#include "ptrace.h"
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#if defined(SPARC64)
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# undef PTRACE_GETREGS
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# define PTRACE_GETREGS PTRACE_GETREGS64
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# undef PTRACE_SETREGS
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# define PTRACE_SETREGS PTRACE_SETREGS64
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#endif
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#if defined SPARC64
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# include <asm/psrcompat.h>
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#elif defined SPARC
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# include <asm/psr.h>
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#endif
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#ifdef IA64
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# include <asm/rse.h>
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#endif
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#ifndef NT_PRSTATUS
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# define NT_PRSTATUS 1
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#endif
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#ifndef NSIG
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# warning: NSIG is not defined, using 32
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# define NSIG 32
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#endif
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#include "syscall.h"
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/* Define these shorthand notations to simplify the syscallent files. */
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#define TD TRACE_DESC
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#define TF TRACE_FILE
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#define TI TRACE_IPC
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#define TN TRACE_NETWORK
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#define TP TRACE_PROCESS
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#define TS TRACE_SIGNAL
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#define TM TRACE_MEMORY
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#define NF SYSCALL_NEVER_FAILS
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#define MA MAX_ARGS
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#define SI STACKTRACE_INVALIDATE_CACHE
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#define SE STACKTRACE_CAPTURE_ON_ENTER
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#define SEN(syscall_name) SEN_ ## syscall_name, SYS_FUNC_NAME(sys_ ## syscall_name)
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const struct_sysent sysent0[] = {
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#include "syscallent.h"
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};
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#if SUPPORTED_PERSONALITIES > 1
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# include PERSONALITY1_INCLUDE_FUNCS
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static const struct_sysent sysent1[] = {
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# include "syscallent1.h"
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};
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#endif
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#if SUPPORTED_PERSONALITIES > 2
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# include PERSONALITY2_INCLUDE_FUNCS
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static const struct_sysent sysent2[] = {
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# include "syscallent2.h"
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};
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#endif
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/* Now undef them since short defines cause wicked namespace pollution. */
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#undef SEN
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#undef TD
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#undef TF
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#undef TI
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#undef TN
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#undef TP
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#undef TS
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#undef TM
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#undef NF
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#undef MA
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#undef SI
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#undef SE
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/*
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* `ioctlent[012].h' files are automatically generated by the auxiliary
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* program `ioctlsort', such that the list is sorted by the `code' field.
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* This has the side-effect of resolving the _IO.. macros into
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* plain integers, eliminating the need to include here everything
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* in "/usr/include".
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*/
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const char *const errnoent0[] = {
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#include "errnoent.h"
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};
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const char *const signalent0[] = {
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#include "signalent.h"
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};
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const struct_ioctlent ioctlent0[] = {
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#include "ioctlent0.h"
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};
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#if SUPPORTED_PERSONALITIES > 1
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static const char *const errnoent1[] = {
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# include "errnoent1.h"
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};
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static const char *const signalent1[] = {
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# include "signalent1.h"
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};
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static const struct_ioctlent ioctlent1[] = {
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# include "ioctlent1.h"
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};
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# include PERSONALITY0_INCLUDE_PRINTERS_DECLS
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static const struct_printers printers0 = {
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# include PERSONALITY0_INCLUDE_PRINTERS_DEFS
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};
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# include PERSONALITY1_INCLUDE_PRINTERS_DECLS
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static const struct_printers printers1 = {
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# include PERSONALITY1_INCLUDE_PRINTERS_DEFS
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};
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#endif
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#if SUPPORTED_PERSONALITIES > 2
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static const char *const errnoent2[] = {
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# include "errnoent2.h"
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};
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static const char *const signalent2[] = {
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# include "signalent2.h"
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};
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static const struct_ioctlent ioctlent2[] = {
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# include "ioctlent2.h"
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};
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# include PERSONALITY2_INCLUDE_PRINTERS_DECLS
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static const struct_printers printers2 = {
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# include PERSONALITY2_INCLUDE_PRINTERS_DEFS
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};
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#endif
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enum {
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nsyscalls0 = ARRAY_SIZE(sysent0)
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#if SUPPORTED_PERSONALITIES > 1
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, nsyscalls1 = ARRAY_SIZE(sysent1)
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# if SUPPORTED_PERSONALITIES > 2
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, nsyscalls2 = ARRAY_SIZE(sysent2)
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# endif
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#endif
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};
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enum {
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nerrnos0 = ARRAY_SIZE(errnoent0)
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#if SUPPORTED_PERSONALITIES > 1
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, nerrnos1 = ARRAY_SIZE(errnoent1)
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# if SUPPORTED_PERSONALITIES > 2
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, nerrnos2 = ARRAY_SIZE(errnoent2)
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# endif
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#endif
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};
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enum {
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nsignals0 = ARRAY_SIZE(signalent0)
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#if SUPPORTED_PERSONALITIES > 1
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, nsignals1 = ARRAY_SIZE(signalent1)
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# if SUPPORTED_PERSONALITIES > 2
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, nsignals2 = ARRAY_SIZE(signalent2)
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# endif
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#endif
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};
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enum {
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nioctlents0 = ARRAY_SIZE(ioctlent0)
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#if SUPPORTED_PERSONALITIES > 1
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, nioctlents1 = ARRAY_SIZE(ioctlent1)
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# if SUPPORTED_PERSONALITIES > 2
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, nioctlents2 = ARRAY_SIZE(ioctlent2)
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# endif
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#endif
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};
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#if SUPPORTED_PERSONALITIES > 1
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const struct_sysent *sysent = sysent0;
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const char *const *errnoent = errnoent0;
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const char *const *signalent = signalent0;
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const struct_ioctlent *ioctlent = ioctlent0;
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const struct_printers *printers = &printers0;
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#endif
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unsigned nsyscalls = nsyscalls0;
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unsigned nerrnos = nerrnos0;
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unsigned nsignals = nsignals0;
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unsigned nioctlents = nioctlents0;
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unsigned num_quals;
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qualbits_t *qual_vec[SUPPORTED_PERSONALITIES];
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static const unsigned nsyscall_vec[SUPPORTED_PERSONALITIES] = {
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nsyscalls0,
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#if SUPPORTED_PERSONALITIES > 1
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nsyscalls1,
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#endif
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#if SUPPORTED_PERSONALITIES > 2
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nsyscalls2,
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#endif
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};
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static const struct_sysent *const sysent_vec[SUPPORTED_PERSONALITIES] = {
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sysent0,
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#if SUPPORTED_PERSONALITIES > 1
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sysent1,
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#endif
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#if SUPPORTED_PERSONALITIES > 2
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sysent2,
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#endif
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};
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enum {
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MAX_NSYSCALLS1 = (nsyscalls0
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#if SUPPORTED_PERSONALITIES > 1
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> nsyscalls1 ? nsyscalls0 : nsyscalls1
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#endif
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),
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MAX_NSYSCALLS2 = (MAX_NSYSCALLS1
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#if SUPPORTED_PERSONALITIES > 2
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> nsyscalls2 ? MAX_NSYSCALLS1 : nsyscalls2
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#endif
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),
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MAX_NSYSCALLS = MAX_NSYSCALLS2,
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/* We are ready for arches with up to 255 signals,
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* even though the largest known signo is on MIPS and it is 128.
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* The number of existing syscalls on all arches is
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* larger that 255 anyway, so it is just a pedantic matter.
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*/
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MIN_QUALS = MAX_NSYSCALLS > 255 ? MAX_NSYSCALLS : 255
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};
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#if SUPPORTED_PERSONALITIES > 1
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unsigned current_personality;
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# ifndef current_wordsize
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unsigned current_wordsize;
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static const int personality_wordsize[SUPPORTED_PERSONALITIES] = {
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PERSONALITY0_WORDSIZE,
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PERSONALITY1_WORDSIZE,
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# if SUPPORTED_PERSONALITIES > 2
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PERSONALITY2_WORDSIZE,
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# endif
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};
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# endif
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void
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set_personality(int personality)
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{
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nsyscalls = nsyscall_vec[personality];
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sysent = sysent_vec[personality];
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switch (personality) {
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case 0:
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errnoent = errnoent0;
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nerrnos = nerrnos0;
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ioctlent = ioctlent0;
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nioctlents = nioctlents0;
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signalent = signalent0;
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nsignals = nsignals0;
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printers = &printers0;
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break;
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case 1:
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errnoent = errnoent1;
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nerrnos = nerrnos1;
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ioctlent = ioctlent1;
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nioctlents = nioctlents1;
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signalent = signalent1;
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nsignals = nsignals1;
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printers = &printers1;
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break;
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# if SUPPORTED_PERSONALITIES > 2
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case 2:
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errnoent = errnoent2;
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nerrnos = nerrnos2;
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ioctlent = ioctlent2;
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nioctlents = nioctlents2;
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signalent = signalent2;
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nsignals = nsignals2;
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printers = &printers2;
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break;
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# endif
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}
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current_personality = personality;
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# ifndef current_wordsize
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current_wordsize = personality_wordsize[personality];
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# endif
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}
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static void
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update_personality(struct tcb *tcp, unsigned int personality)
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{
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if (personality == current_personality)
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return;
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set_personality(personality);
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if (personality == tcp->currpers)
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return;
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tcp->currpers = personality;
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# undef PERSONALITY_NAMES
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# if defined POWERPC64
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# define PERSONALITY_NAMES {"64 bit", "32 bit"}
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# elif defined X86_64
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# define PERSONALITY_NAMES {"64 bit", "32 bit", "x32"}
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# elif defined X32
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# define PERSONALITY_NAMES {"x32", "32 bit"}
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# elif defined AARCH64
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# define PERSONALITY_NAMES {"64 bit", "32 bit"}
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# elif defined TILE
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# define PERSONALITY_NAMES {"64-bit", "32-bit"}
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# endif
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# ifdef PERSONALITY_NAMES
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if (!qflag) {
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static const char *const names[] = PERSONALITY_NAMES;
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error_msg("[ Process PID=%d runs in %s mode. ]",
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tcp->pid, names[personality]);
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}
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# endif
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}
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#endif
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static int qual_syscall(), qual_signal(), qual_desc();
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static const struct qual_options {
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unsigned int bitflag;
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const char *option_name;
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int (*qualify)(const char *, int, int);
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const char *argument_name;
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} qual_options[] = {
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{ QUAL_TRACE, "trace", qual_syscall, "system call" },
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{ QUAL_TRACE, "t", qual_syscall, "system call" },
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{ QUAL_ABBREV, "abbrev", qual_syscall, "system call" },
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{ QUAL_ABBREV, "a", qual_syscall, "system call" },
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{ QUAL_VERBOSE, "verbose", qual_syscall, "system call" },
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{ QUAL_VERBOSE, "v", qual_syscall, "system call" },
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{ QUAL_RAW, "raw", qual_syscall, "system call" },
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{ QUAL_RAW, "x", qual_syscall, "system call" },
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{ QUAL_SIGNAL, "signal", qual_signal, "signal" },
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{ QUAL_SIGNAL, "signals", qual_signal, "signal" },
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{ QUAL_SIGNAL, "s", qual_signal, "signal" },
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{ QUAL_READ, "read", qual_desc, "descriptor" },
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{ QUAL_READ, "reads", qual_desc, "descriptor" },
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{ QUAL_READ, "r", qual_desc, "descriptor" },
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{ QUAL_WRITE, "write", qual_desc, "descriptor" },
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{ QUAL_WRITE, "writes", qual_desc, "descriptor" },
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{ QUAL_WRITE, "w", qual_desc, "descriptor" },
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{ 0, NULL, NULL, NULL },
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};
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static void
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reallocate_qual(const unsigned int n)
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{
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unsigned p;
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qualbits_t *qp;
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for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
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qp = qual_vec[p] = xreallocarray(qual_vec[p], n,
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sizeof(qualbits_t));
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memset(&qp[num_quals], 0, (n - num_quals) * sizeof(qualbits_t));
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}
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num_quals = n;
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}
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static void
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qualify_one(const unsigned int n, unsigned int bitflag, const int not, const int pers)
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{
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int p;
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if (num_quals <= n)
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reallocate_qual(n + 1);
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for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
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if (pers == p || pers < 0) {
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if (not)
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qual_vec[p][n] &= ~bitflag;
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else
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qual_vec[p][n] |= bitflag;
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}
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}
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}
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|
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static int
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qual_syscall(const char *s, const unsigned int bitflag, const int not)
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{
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int p;
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unsigned int i;
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int rc = -1;
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if (*s >= '0' && *s <= '9') {
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i = string_to_uint(s);
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if (i >= MAX_NSYSCALLS)
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return -1;
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qualify_one(i, bitflag, not, -1);
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return 0;
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}
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|
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for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
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for (i = 0; i < nsyscall_vec[p]; i++) {
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if (sysent_vec[p][i].sys_name
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&& strcmp(s, sysent_vec[p][i].sys_name) == 0
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) {
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qualify_one(i, bitflag, not, p);
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rc = 0;
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}
|
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}
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}
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|
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return rc;
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}
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|
|
static int
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qual_signal(const char *s, const unsigned int bitflag, const int not)
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{
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unsigned int i;
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|
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if (*s >= '0' && *s <= '9') {
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int signo = string_to_uint(s);
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if (signo < 0 || signo > 255)
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return -1;
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qualify_one(signo, bitflag, not, -1);
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return 0;
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}
|
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if (strncasecmp(s, "SIG", 3) == 0)
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s += 3;
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for (i = 0; i <= NSIG; i++) {
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if (strcasecmp(s, signame(i) + 3) == 0) {
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qualify_one(i, bitflag, not, -1);
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return 0;
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}
|
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}
|
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return -1;
|
|
}
|
|
|
|
static int
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qual_desc(const char *s, const unsigned int bitflag, const int not)
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|
{
|
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if (*s >= '0' && *s <= '9') {
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int desc = string_to_uint(s);
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if (desc < 0 || desc > 0x7fff) /* paranoia */
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return -1;
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qualify_one(desc, bitflag, not, -1);
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return 0;
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|
}
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return -1;
|
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}
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|
|
static int
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lookup_class(const char *s)
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|
{
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|
if (strcmp(s, "file") == 0)
|
|
return TRACE_FILE;
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|
if (strcmp(s, "ipc") == 0)
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|
return TRACE_IPC;
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|
if (strcmp(s, "network") == 0)
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return TRACE_NETWORK;
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if (strcmp(s, "process") == 0)
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return TRACE_PROCESS;
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if (strcmp(s, "signal") == 0)
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return TRACE_SIGNAL;
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if (strcmp(s, "desc") == 0)
|
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return TRACE_DESC;
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if (strcmp(s, "memory") == 0)
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return TRACE_MEMORY;
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return -1;
|
|
}
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|
|
void
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qualify(const char *s)
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|
{
|
|
const struct qual_options *opt;
|
|
char *copy;
|
|
const char *p;
|
|
int not;
|
|
unsigned int i;
|
|
|
|
if (num_quals == 0)
|
|
reallocate_qual(MIN_QUALS);
|
|
|
|
opt = &qual_options[0];
|
|
for (i = 0; (p = qual_options[i].option_name); i++) {
|
|
unsigned int len = strlen(p);
|
|
if (strncmp(s, p, len) == 0 && s[len] == '=') {
|
|
opt = &qual_options[i];
|
|
s += len + 1;
|
|
break;
|
|
}
|
|
}
|
|
not = 0;
|
|
if (*s == '!') {
|
|
not = 1;
|
|
s++;
|
|
}
|
|
if (strcmp(s, "none") == 0) {
|
|
not = 1 - not;
|
|
s = "all";
|
|
}
|
|
if (strcmp(s, "all") == 0) {
|
|
for (i = 0; i < num_quals; i++) {
|
|
qualify_one(i, opt->bitflag, not, -1);
|
|
}
|
|
return;
|
|
}
|
|
for (i = 0; i < num_quals; i++) {
|
|
qualify_one(i, opt->bitflag, !not, -1);
|
|
}
|
|
copy = xstrdup(s);
|
|
for (p = strtok(copy, ","); p; p = strtok(NULL, ",")) {
|
|
int n;
|
|
if (opt->bitflag == QUAL_TRACE && (n = lookup_class(p)) > 0) {
|
|
unsigned pers;
|
|
for (pers = 0; pers < SUPPORTED_PERSONALITIES; pers++) {
|
|
for (i = 0; i < nsyscall_vec[pers]; i++)
|
|
if (sysent_vec[pers][i].sys_flags & n)
|
|
qualify_one(i, opt->bitflag, not, pers);
|
|
}
|
|
continue;
|
|
}
|
|
if (opt->qualify(p, opt->bitflag, not)) {
|
|
error_msg_and_die("invalid %s '%s'",
|
|
opt->argument_name, p);
|
|
}
|
|
}
|
|
free(copy);
|
|
return;
|
|
}
|
|
|
|
#ifdef SYS_socket_subcall
|
|
static void
|
|
decode_socket_subcall(struct tcb *tcp)
|
|
{
|
|
unsigned long addr;
|
|
unsigned int n;
|
|
|
|
if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_socket_nsubcalls)
|
|
return;
|
|
|
|
tcp->scno = SYS_socket_subcall + tcp->u_arg[0];
|
|
tcp->qual_flg = qual_flags[tcp->scno];
|
|
tcp->s_ent = &sysent[tcp->scno];
|
|
addr = tcp->u_arg[1];
|
|
n = tcp->s_ent->nargs;
|
|
if (sizeof(tcp->u_arg[0]) == current_wordsize) {
|
|
memset(tcp->u_arg, 0, n * sizeof(tcp->u_arg[0]));
|
|
(void) umoven(tcp, addr, n * sizeof(tcp->u_arg[0]), tcp->u_arg);
|
|
} else {
|
|
unsigned int args[n];
|
|
unsigned int i;
|
|
|
|
memset(args, 0, sizeof(args));
|
|
(void) umove(tcp, addr, &args);
|
|
for (i = 0; i < n; ++i)
|
|
tcp->u_arg[i] = args[i];
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef SYS_ipc_subcall
|
|
static void
|
|
decode_ipc_subcall(struct tcb *tcp)
|
|
{
|
|
unsigned int i, n;
|
|
|
|
if (tcp->u_arg[0] < 0 || tcp->u_arg[0] >= SYS_ipc_nsubcalls)
|
|
return;
|
|
|
|
tcp->scno = SYS_ipc_subcall + tcp->u_arg[0];
|
|
tcp->qual_flg = qual_flags[tcp->scno];
|
|
tcp->s_ent = &sysent[tcp->scno];
|
|
n = tcp->s_ent->nargs;
|
|
for (i = 0; i < n; i++)
|
|
tcp->u_arg[i] = tcp->u_arg[i + 1];
|
|
}
|
|
#endif
|
|
|
|
#ifdef LINUX_MIPSO32
|
|
static void
|
|
decode_mips_subcall(struct tcb *tcp)
|
|
{
|
|
if (!SCNO_IS_VALID(tcp->u_arg[0]))
|
|
return;
|
|
tcp->scno = tcp->u_arg[0];
|
|
tcp->qual_flg = qual_flags[tcp->scno];
|
|
tcp->s_ent = &sysent[tcp->scno];
|
|
memmove(&tcp->u_arg[0], &tcp->u_arg[1],
|
|
sizeof(tcp->u_arg) - sizeof(tcp->u_arg[0]));
|
|
/*
|
|
* Fetching the last arg of 7-arg syscalls (fadvise64_64
|
|
* and sync_file_range) would require additional code,
|
|
* see linux/mips/get_syscall_args.c
|
|
*/
|
|
}
|
|
#endif
|
|
|
|
int
|
|
printargs(struct tcb *tcp)
|
|
{
|
|
if (entering(tcp)) {
|
|
int i;
|
|
int n = tcp->s_ent->nargs;
|
|
for (i = 0; i < n; i++)
|
|
tprintf("%s%#lx", i ? ", " : "", tcp->u_arg[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
printargs_lu(struct tcb *tcp)
|
|
{
|
|
if (entering(tcp)) {
|
|
int i;
|
|
int n = tcp->s_ent->nargs;
|
|
for (i = 0; i < n; i++)
|
|
tprintf("%s%lu", i ? ", " : "", tcp->u_arg[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
printargs_ld(struct tcb *tcp)
|
|
{
|
|
if (entering(tcp)) {
|
|
int i;
|
|
int n = tcp->s_ent->nargs;
|
|
for (i = 0; i < n; i++)
|
|
tprintf("%s%ld", i ? ", " : "", tcp->u_arg[i]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
dumpio(struct tcb *tcp)
|
|
{
|
|
int sen;
|
|
|
|
if (syserror(tcp))
|
|
return;
|
|
if ((unsigned long) tcp->u_arg[0] >= num_quals)
|
|
return;
|
|
sen = tcp->s_ent->sen;
|
|
if (SEN_printargs == sen)
|
|
return;
|
|
if (qual_flags[tcp->u_arg[0]] & QUAL_READ) {
|
|
switch (sen) {
|
|
case SEN_read:
|
|
case SEN_pread:
|
|
case SEN_recv:
|
|
case SEN_recvfrom:
|
|
dumpstr(tcp, tcp->u_arg[1], tcp->u_rval);
|
|
return;
|
|
case SEN_readv:
|
|
dumpiov_upto(tcp, tcp->u_arg[2], tcp->u_arg[1],
|
|
tcp->u_rval);
|
|
return;
|
|
case SEN_recvmsg:
|
|
dumpiov_in_msghdr(tcp, tcp->u_arg[1], tcp->u_rval);
|
|
return;
|
|
case SEN_recvmmsg:
|
|
dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
|
|
return;
|
|
}
|
|
}
|
|
if (qual_flags[tcp->u_arg[0]] & QUAL_WRITE) {
|
|
switch (sen) {
|
|
case SEN_write:
|
|
case SEN_pwrite:
|
|
case SEN_send:
|
|
case SEN_sendto:
|
|
dumpstr(tcp, tcp->u_arg[1], tcp->u_arg[2]);
|
|
break;
|
|
case SEN_writev:
|
|
dumpiov(tcp, tcp->u_arg[2], tcp->u_arg[1]);
|
|
break;
|
|
case SEN_sendmsg:
|
|
dumpiov_in_msghdr(tcp, tcp->u_arg[1],
|
|
(unsigned long) -1L);
|
|
break;
|
|
case SEN_sendmmsg:
|
|
dumpiov_in_mmsghdr(tcp, tcp->u_arg[1]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Shuffle syscall numbers so that we don't have huge gaps in syscall table.
|
|
* The shuffling should be an involution: shuffle_scno(shuffle_scno(n)) == n.
|
|
*/
|
|
#if defined(ARM) || defined(AARCH64) /* So far only 32-bit ARM needs this */
|
|
static long
|
|
shuffle_scno(unsigned long scno)
|
|
{
|
|
if (scno < ARM_FIRST_SHUFFLED_SYSCALL)
|
|
return scno;
|
|
|
|
/* __ARM_NR_cmpxchg? Swap with LAST_ORDINARY+1 */
|
|
if (scno == ARM_FIRST_SHUFFLED_SYSCALL)
|
|
return 0x000ffff0;
|
|
if (scno == 0x000ffff0)
|
|
return ARM_FIRST_SHUFFLED_SYSCALL;
|
|
|
|
#define ARM_SECOND_SHUFFLED_SYSCALL (ARM_FIRST_SHUFFLED_SYSCALL + 1)
|
|
/*
|
|
* Is it ARM specific syscall?
|
|
* Swap [0x000f0000, 0x000f0000 + LAST_SPECIAL] range
|
|
* with [SECOND_SHUFFLED, SECOND_SHUFFLED + LAST_SPECIAL] range.
|
|
*/
|
|
if (scno >= 0x000f0000 &&
|
|
scno <= 0x000f0000 + ARM_LAST_SPECIAL_SYSCALL) {
|
|
return scno - 0x000f0000 + ARM_SECOND_SHUFFLED_SYSCALL;
|
|
}
|
|
if (scno <= ARM_SECOND_SHUFFLED_SYSCALL + ARM_LAST_SPECIAL_SYSCALL) {
|
|
return scno + 0x000f0000 - ARM_SECOND_SHUFFLED_SYSCALL;
|
|
}
|
|
|
|
return scno;
|
|
}
|
|
#else
|
|
# define shuffle_scno(scno) ((long)(scno))
|
|
#endif
|
|
|
|
const char *
|
|
syscall_name(long scno)
|
|
{
|
|
static char buf[sizeof("syscall_%lu") + sizeof(long)*3];
|
|
|
|
if (SCNO_IS_VALID(scno))
|
|
return sysent[scno].sys_name;
|
|
else {
|
|
sprintf(buf, "syscall_%lu", shuffle_scno(scno));
|
|
return buf;
|
|
}
|
|
}
|
|
|
|
static long get_regs_error;
|
|
|
|
void
|
|
clear_regs(void)
|
|
{
|
|
get_regs_error = -1;
|
|
}
|
|
|
|
static int get_syscall_args(struct tcb *);
|
|
static int get_syscall_result(struct tcb *);
|
|
static int arch_get_scno(struct tcb *tcp);
|
|
static void get_error(struct tcb *, const bool);
|
|
#if defined X86_64 || defined POWERPC
|
|
static int getregs_old(pid_t);
|
|
#endif
|
|
|
|
static int
|
|
trace_syscall_entering(struct tcb *tcp)
|
|
{
|
|
int res, scno_good;
|
|
|
|
scno_good = res = get_scno(tcp);
|
|
if (res == 0)
|
|
return res;
|
|
if (res == 1)
|
|
res = get_syscall_args(tcp);
|
|
|
|
if (res != 1) {
|
|
printleader(tcp);
|
|
if (scno_good != 1)
|
|
tprints("????" /* anti-trigraph gap */ "(");
|
|
else if (tcp->qual_flg & UNDEFINED_SCNO)
|
|
tprintf("%s(", syscall_name(tcp->scno));
|
|
else
|
|
tprintf("%s(", tcp->s_ent->sys_name);
|
|
/*
|
|
* " <unavailable>" will be added later by the code which
|
|
* detects ptrace errors.
|
|
*/
|
|
goto ret;
|
|
}
|
|
|
|
#ifdef LINUX_MIPSO32
|
|
if (SEN_syscall == tcp->s_ent->sen)
|
|
decode_mips_subcall(tcp);
|
|
#endif
|
|
|
|
if ( SEN_execve == tcp->s_ent->sen
|
|
# if defined(SPARC) || defined(SPARC64)
|
|
|| SEN_execv == tcp->s_ent->sen
|
|
# endif
|
|
) {
|
|
hide_log_until_execve = 0;
|
|
}
|
|
|
|
#if defined(SYS_socket_subcall) || defined(SYS_ipc_subcall)
|
|
switch (tcp->s_ent->sen) {
|
|
# ifdef SYS_socket_subcall
|
|
case SEN_socketcall:
|
|
decode_socket_subcall(tcp);
|
|
break;
|
|
# endif
|
|
# ifdef SYS_ipc_subcall
|
|
case SEN_ipc:
|
|
decode_ipc_subcall(tcp);
|
|
break;
|
|
# endif
|
|
}
|
|
#endif
|
|
|
|
if (!(tcp->qual_flg & QUAL_TRACE)
|
|
|| (tracing_paths && !pathtrace_match(tcp))
|
|
) {
|
|
tcp->flags |= TCB_INSYSCALL | TCB_FILTERED;
|
|
tcp->sys_func_rval = 0;
|
|
return 0;
|
|
}
|
|
|
|
tcp->flags &= ~TCB_FILTERED;
|
|
|
|
if (cflag == CFLAG_ONLY_STATS || hide_log_until_execve) {
|
|
res = 0;
|
|
goto ret;
|
|
}
|
|
|
|
#ifdef USE_LIBUNWIND
|
|
if (stack_trace_enabled) {
|
|
if (tcp->s_ent->sys_flags & STACKTRACE_CAPTURE_ON_ENTER)
|
|
unwind_capture_stacktrace(tcp);
|
|
}
|
|
#endif
|
|
|
|
printleader(tcp);
|
|
if (tcp->qual_flg & UNDEFINED_SCNO)
|
|
tprintf("%s(", syscall_name(tcp->scno));
|
|
else
|
|
tprintf("%s(", tcp->s_ent->sys_name);
|
|
if ((tcp->qual_flg & QUAL_RAW) && SEN_exit != tcp->s_ent->sen)
|
|
res = printargs(tcp);
|
|
else
|
|
res = tcp->s_ent->sys_func(tcp);
|
|
|
|
fflush(tcp->outf);
|
|
ret:
|
|
tcp->flags |= TCB_INSYSCALL;
|
|
tcp->sys_func_rval = res;
|
|
/* Measure the entrance time as late as possible to avoid errors. */
|
|
if (Tflag || cflag)
|
|
gettimeofday(&tcp->etime, NULL);
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
trace_syscall_exiting(struct tcb *tcp)
|
|
{
|
|
int sys_res;
|
|
struct timeval tv;
|
|
int res;
|
|
long u_error;
|
|
|
|
/* Measure the exit time as early as possible to avoid errors. */
|
|
if (Tflag || cflag)
|
|
gettimeofday(&tv, NULL);
|
|
|
|
#ifdef USE_LIBUNWIND
|
|
if (stack_trace_enabled) {
|
|
if (tcp->s_ent->sys_flags & STACKTRACE_INVALIDATE_CACHE)
|
|
unwind_cache_invalidate(tcp);
|
|
}
|
|
#endif
|
|
|
|
#if SUPPORTED_PERSONALITIES > 1
|
|
update_personality(tcp, tcp->currpers);
|
|
#endif
|
|
res = (get_regs_error ? -1 : get_syscall_result(tcp));
|
|
if (filtered(tcp) || hide_log_until_execve)
|
|
goto ret;
|
|
|
|
if (cflag) {
|
|
count_syscall(tcp, &tv);
|
|
if (cflag == CFLAG_ONLY_STATS) {
|
|
goto ret;
|
|
}
|
|
}
|
|
|
|
/* If not in -ff mode, and printing_tcp != tcp,
|
|
* then the log currently does not end with output
|
|
* of _our syscall entry_, but with something else.
|
|
* We need to say which syscall's return is this.
|
|
*
|
|
* Forced reprinting via TCB_REPRINT is used only by
|
|
* "strace -ff -oLOG test/threaded_execve" corner case.
|
|
* It's the only case when -ff mode needs reprinting.
|
|
*/
|
|
if ((followfork < 2 && printing_tcp != tcp) || (tcp->flags & TCB_REPRINT)) {
|
|
tcp->flags &= ~TCB_REPRINT;
|
|
printleader(tcp);
|
|
if (tcp->qual_flg & UNDEFINED_SCNO)
|
|
tprintf("<... %s resumed> ", syscall_name(tcp->scno));
|
|
else
|
|
tprintf("<... %s resumed> ", tcp->s_ent->sys_name);
|
|
}
|
|
printing_tcp = tcp;
|
|
|
|
tcp->s_prev_ent = NULL;
|
|
if (res != 1) {
|
|
/* There was error in one of prior ptrace ops */
|
|
tprints(") ");
|
|
tabto();
|
|
tprints("= ? <unavailable>\n");
|
|
line_ended();
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
tcp->sys_func_rval = 0;
|
|
return res;
|
|
}
|
|
tcp->s_prev_ent = tcp->s_ent;
|
|
|
|
sys_res = 0;
|
|
if (tcp->qual_flg & QUAL_RAW) {
|
|
/* sys_res = printargs(tcp); - but it's nop on sysexit */
|
|
} else {
|
|
/* FIXME: not_failing_only (IOW, option -z) is broken:
|
|
* failure of syscall is known only after syscall return.
|
|
* Thus we end up with something like this on, say, ENOENT:
|
|
* open("doesnt_exist", O_RDONLY <unfinished ...>
|
|
* {next syscall decode}
|
|
* whereas the intended result is that open(...) line
|
|
* is not shown at all.
|
|
*/
|
|
if (not_failing_only && tcp->u_error)
|
|
goto ret; /* ignore failed syscalls */
|
|
if (tcp->sys_func_rval & RVAL_DECODED)
|
|
sys_res = tcp->sys_func_rval;
|
|
else
|
|
sys_res = tcp->s_ent->sys_func(tcp);
|
|
}
|
|
|
|
tprints(") ");
|
|
tabto();
|
|
u_error = tcp->u_error;
|
|
if (tcp->qual_flg & QUAL_RAW) {
|
|
if (u_error)
|
|
tprintf("= -1 (errno %ld)", u_error);
|
|
else
|
|
tprintf("= %#lx", tcp->u_rval);
|
|
}
|
|
else if (!(sys_res & RVAL_NONE) && u_error) {
|
|
switch (u_error) {
|
|
/* Blocked signals do not interrupt any syscalls.
|
|
* In this case syscalls don't return ERESTARTfoo codes.
|
|
*
|
|
* Deadly signals set to SIG_DFL interrupt syscalls
|
|
* and kill the process regardless of which of the codes below
|
|
* is returned by the interrupted syscall.
|
|
* In some cases, kernel forces a kernel-generated deadly
|
|
* signal to be unblocked and set to SIG_DFL (and thus cause
|
|
* death) if it is blocked or SIG_IGNed: for example, SIGSEGV
|
|
* or SIGILL. (The alternative is to leave process spinning
|
|
* forever on the faulty instruction - not useful).
|
|
*
|
|
* SIG_IGNed signals and non-deadly signals set to SIG_DFL
|
|
* (for example, SIGCHLD, SIGWINCH) interrupt syscalls,
|
|
* but kernel will always restart them.
|
|
*/
|
|
case ERESTARTSYS:
|
|
/* Most common type of signal-interrupted syscall exit code.
|
|
* The system call will be restarted with the same arguments
|
|
* if SA_RESTART is set; otherwise, it will fail with EINTR.
|
|
*/
|
|
tprints("= ? ERESTARTSYS (To be restarted if SA_RESTART is set)");
|
|
break;
|
|
case ERESTARTNOINTR:
|
|
/* Rare. For example, fork() returns this if interrupted.
|
|
* SA_RESTART is ignored (assumed set): the restart is unconditional.
|
|
*/
|
|
tprints("= ? ERESTARTNOINTR (To be restarted)");
|
|
break;
|
|
case ERESTARTNOHAND:
|
|
/* pause(), rt_sigsuspend() etc use this code.
|
|
* SA_RESTART is ignored (assumed not set):
|
|
* syscall won't restart (will return EINTR instead)
|
|
* even after signal with SA_RESTART set. However,
|
|
* after SIG_IGN or SIG_DFL signal it will restart
|
|
* (thus the name "restart only if has no handler").
|
|
*/
|
|
tprints("= ? ERESTARTNOHAND (To be restarted if no handler)");
|
|
break;
|
|
case ERESTART_RESTARTBLOCK:
|
|
/* Syscalls like nanosleep(), poll() which can't be
|
|
* restarted with their original arguments use this
|
|
* code. Kernel will execute restart_syscall() instead,
|
|
* which changes arguments before restarting syscall.
|
|
* SA_RESTART is ignored (assumed not set) similarly
|
|
* to ERESTARTNOHAND. (Kernel can't honor SA_RESTART
|
|
* since restart data is saved in "restart block"
|
|
* in task struct, and if signal handler uses a syscall
|
|
* which in turn saves another such restart block,
|
|
* old data is lost and restart becomes impossible)
|
|
*/
|
|
tprints("= ? ERESTART_RESTARTBLOCK (Interrupted by signal)");
|
|
break;
|
|
default:
|
|
if ((unsigned long) u_error < nerrnos
|
|
&& errnoent[u_error])
|
|
tprintf("= -1 %s (%s)", errnoent[u_error],
|
|
strerror(u_error));
|
|
else
|
|
tprintf("= -1 ERRNO_%lu (%s)", u_error,
|
|
strerror(u_error));
|
|
break;
|
|
}
|
|
if ((sys_res & RVAL_STR) && tcp->auxstr)
|
|
tprintf(" (%s)", tcp->auxstr);
|
|
}
|
|
else {
|
|
if (sys_res & RVAL_NONE)
|
|
tprints("= ?");
|
|
else {
|
|
switch (sys_res & RVAL_MASK) {
|
|
case RVAL_HEX:
|
|
#if SUPPORTED_PERSONALITIES > 1
|
|
if (current_wordsize < sizeof(long))
|
|
tprintf("= %#x",
|
|
(unsigned int) tcp->u_rval);
|
|
else
|
|
#endif
|
|
tprintf("= %#lx", tcp->u_rval);
|
|
break;
|
|
case RVAL_OCTAL:
|
|
tprintf("= %#lo", tcp->u_rval);
|
|
break;
|
|
case RVAL_UDECIMAL:
|
|
#if SUPPORTED_PERSONALITIES > 1
|
|
if (current_wordsize < sizeof(long))
|
|
tprintf("= %u",
|
|
(unsigned int) tcp->u_rval);
|
|
else
|
|
#endif
|
|
tprintf("= %lu", tcp->u_rval);
|
|
break;
|
|
case RVAL_DECIMAL:
|
|
tprintf("= %ld", tcp->u_rval);
|
|
break;
|
|
case RVAL_FD:
|
|
if (show_fd_path) {
|
|
tprints("= ");
|
|
printfd(tcp, tcp->u_rval);
|
|
}
|
|
else
|
|
tprintf("= %ld", tcp->u_rval);
|
|
break;
|
|
#if defined(LINUX_MIPSN32) || defined(X32)
|
|
/*
|
|
case RVAL_LHEX:
|
|
tprintf("= %#llx", tcp->u_lrval);
|
|
break;
|
|
case RVAL_LOCTAL:
|
|
tprintf("= %#llo", tcp->u_lrval);
|
|
break;
|
|
*/
|
|
case RVAL_LUDECIMAL:
|
|
tprintf("= %llu", tcp->u_lrval);
|
|
break;
|
|
/*
|
|
case RVAL_LDECIMAL:
|
|
tprintf("= %lld", tcp->u_lrval);
|
|
break;
|
|
*/
|
|
#endif
|
|
default:
|
|
error_msg("invalid rval format");
|
|
break;
|
|
}
|
|
}
|
|
if ((sys_res & RVAL_STR) && tcp->auxstr)
|
|
tprintf(" (%s)", tcp->auxstr);
|
|
}
|
|
if (Tflag) {
|
|
tv_sub(&tv, &tv, &tcp->etime);
|
|
tprintf(" <%ld.%06ld>",
|
|
(long) tv.tv_sec, (long) tv.tv_usec);
|
|
}
|
|
tprints("\n");
|
|
dumpio(tcp);
|
|
line_ended();
|
|
|
|
#ifdef USE_LIBUNWIND
|
|
if (stack_trace_enabled)
|
|
unwind_print_stacktrace(tcp);
|
|
#endif
|
|
|
|
ret:
|
|
tcp->flags &= ~TCB_INSYSCALL;
|
|
tcp->sys_func_rval = 0;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
trace_syscall(struct tcb *tcp)
|
|
{
|
|
return exiting(tcp) ?
|
|
trace_syscall_exiting(tcp) : trace_syscall_entering(tcp);
|
|
}
|
|
|
|
bool
|
|
is_erestart(struct tcb *tcp)
|
|
{
|
|
switch (tcp->u_error) {
|
|
case ERESTARTSYS:
|
|
case ERESTARTNOINTR:
|
|
case ERESTARTNOHAND:
|
|
case ERESTART_RESTARTBLOCK:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static int saved_u_error;
|
|
|
|
void
|
|
temporarily_clear_syserror(struct tcb *tcp)
|
|
{
|
|
saved_u_error = tcp->u_error;
|
|
tcp->u_error = 0;
|
|
}
|
|
|
|
void
|
|
restore_cleared_syserror(struct tcb *tcp)
|
|
{
|
|
tcp->u_error = saved_u_error;
|
|
}
|
|
|
|
#include "kernel_types.h"
|
|
|
|
/*
|
|
* Check the syscall return value register value for whether it is
|
|
* a negated errno code indicating an error, or a success return value.
|
|
*/
|
|
static inline bool
|
|
is_negated_errno(kernel_ulong_t val)
|
|
{
|
|
/* Linux kernel defines MAX_ERRNO to 4095. */
|
|
kernel_ulong_t max = -(kernel_long_t) 4095;
|
|
|
|
#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
|
|
if (current_wordsize < sizeof(val)) {
|
|
val = (uint32_t) val;
|
|
max = (uint32_t) max;
|
|
}
|
|
#elif defined X32
|
|
/*
|
|
* current_wordsize is 4 even in personality 0 (native X32)
|
|
* but truncation _must not_ be done in it.
|
|
* can't check current_wordsize here!
|
|
*/
|
|
if (current_personality != 0) {
|
|
val = (uint32_t) val;
|
|
max = (uint32_t) max;
|
|
}
|
|
#endif
|
|
|
|
return val >= max;
|
|
}
|
|
|
|
#include "arch_regs.c"
|
|
|
|
#ifdef HAVE_GETRVAL2
|
|
# include "arch_getrval2.c"
|
|
#endif
|
|
|
|
void
|
|
print_pc(struct tcb *tcp)
|
|
{
|
|
#if defined ARCH_PC_REG
|
|
# define ARCH_GET_PC 0
|
|
#elif defined ARCH_PC_PEEK_ADDR
|
|
long pc;
|
|
# define ARCH_PC_REG pc
|
|
# define ARCH_GET_PC upeek(tcp->pid, ARCH_PC_PEEK_ADDR, &pc)
|
|
#else
|
|
# error Neither ARCH_PC_REG nor ARCH_PC_PEEK_ADDR is defined
|
|
#endif
|
|
if (get_regs_error || ARCH_GET_PC)
|
|
tprints(current_wordsize == 4 ? "[????????] "
|
|
: "[????????????????] ");
|
|
else
|
|
tprintf(current_wordsize == 4 ? "[%08lx] " : "[%016lx] ",
|
|
(unsigned long) ARCH_PC_REG);
|
|
}
|
|
|
|
#if defined ARCH_REGS_FOR_GETREGSET
|
|
static long
|
|
get_regset(pid_t pid)
|
|
{
|
|
# ifdef ARCH_IOVEC_FOR_GETREGSET
|
|
/* variable iovec */
|
|
ARCH_IOVEC_FOR_GETREGSET.iov_len = sizeof(ARCH_REGS_FOR_GETREGSET);
|
|
return ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS,
|
|
&ARCH_IOVEC_FOR_GETREGSET);
|
|
# else
|
|
/* constant iovec */
|
|
static struct iovec io = {
|
|
.iov_base = &ARCH_REGS_FOR_GETREGSET,
|
|
.iov_len = sizeof(ARCH_REGS_FOR_GETREGSET)
|
|
};
|
|
return ptrace(PTRACE_GETREGSET, pid, NT_PRSTATUS, &io);
|
|
|
|
# endif
|
|
}
|
|
#endif /* ARCH_REGS_FOR_GETREGSET */
|
|
|
|
void
|
|
get_regs(pid_t pid)
|
|
{
|
|
#undef USE_GET_SYSCALL_RESULT_REGS
|
|
#ifdef ARCH_REGS_FOR_GETREGSET
|
|
# ifdef X86_64
|
|
/* Try PTRACE_GETREGSET first, fallback to PTRACE_GETREGS. */
|
|
static int getregset_support;
|
|
|
|
if (getregset_support >= 0) {
|
|
get_regs_error = get_regset(pid);
|
|
if (getregset_support > 0)
|
|
return;
|
|
if (get_regs_error >= 0) {
|
|
getregset_support = 1;
|
|
return;
|
|
}
|
|
if (errno == EPERM || errno == ESRCH)
|
|
return;
|
|
getregset_support = -1;
|
|
}
|
|
get_regs_error = getregs_old(pid);
|
|
# else /* !X86_64 */
|
|
/* Assume that PTRACE_GETREGSET works. */
|
|
get_regs_error = get_regset(pid);
|
|
# endif
|
|
#elif defined ARCH_REGS_FOR_GETREGS
|
|
# if defined SPARC || defined SPARC64
|
|
/* SPARC systems have the meaning of data and addr reversed */
|
|
get_regs_error = ptrace(PTRACE_GETREGS, pid, (char *)&ARCH_REGS_FOR_GETREGS, 0);
|
|
# elif defined POWERPC
|
|
static bool old_kernel = 0;
|
|
if (old_kernel)
|
|
goto old;
|
|
get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
|
|
if (get_regs_error && errno == EIO) {
|
|
old_kernel = 1;
|
|
old:
|
|
get_regs_error = getregs_old(pid);
|
|
}
|
|
# else
|
|
/* Assume that PTRACE_GETREGS works. */
|
|
get_regs_error = ptrace(PTRACE_GETREGS, pid, NULL, &ARCH_REGS_FOR_GETREGS);
|
|
# endif
|
|
|
|
#else /* !ARCH_REGS_FOR_GETREGSET && !ARCH_REGS_FOR_GETREGS */
|
|
# define USE_GET_SYSCALL_RESULT_REGS 1
|
|
# warning get_regs is not implemented for this architecture yet
|
|
get_regs_error = 0;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* 0: "ignore this ptrace stop", bail out of trace_syscall_entering() silently.
|
|
* 1: ok, continue in trace_syscall_entering().
|
|
* other: error, trace_syscall_entering() should print error indicator
|
|
* ("????" etc) and bail out.
|
|
*/
|
|
int
|
|
get_scno(struct tcb *tcp)
|
|
{
|
|
if (get_regs_error)
|
|
return -1;
|
|
|
|
int rc = arch_get_scno(tcp);
|
|
if (rc != 1)
|
|
return rc;
|
|
|
|
if (SCNO_IS_VALID(tcp->scno)) {
|
|
tcp->s_ent = &sysent[tcp->scno];
|
|
tcp->qual_flg = qual_flags[tcp->scno];
|
|
} else {
|
|
static const struct_sysent unknown = {
|
|
.nargs = MAX_ARGS,
|
|
.sys_flags = 0,
|
|
.sys_func = printargs,
|
|
.sys_name = "system call",
|
|
};
|
|
tcp->s_ent = &unknown;
|
|
tcp->qual_flg = UNDEFINED_SCNO | QUAL_RAW | DEFAULT_QUAL_FLAGS;
|
|
if (debug_flag)
|
|
error_msg("pid %d invalid syscall %ld", tcp->pid, tcp->scno);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#ifdef USE_GET_SYSCALL_RESULT_REGS
|
|
static int get_syscall_result_regs(struct tcb *);
|
|
#endif
|
|
|
|
/* Returns:
|
|
* 1: ok, continue in trace_syscall_exiting().
|
|
* -1: error, trace_syscall_exiting() should print error indicator
|
|
* ("????" etc) and bail out.
|
|
*/
|
|
static int
|
|
get_syscall_result(struct tcb *tcp)
|
|
{
|
|
#ifdef USE_GET_SYSCALL_RESULT_REGS
|
|
if (get_syscall_result_regs(tcp))
|
|
return -1;
|
|
#endif
|
|
tcp->u_error = 0;
|
|
get_error(tcp, !(tcp->s_ent->sys_flags & SYSCALL_NEVER_FAILS));
|
|
|
|
return 1;
|
|
}
|
|
|
|
#include "get_scno.c"
|
|
#include "get_syscall_args.c"
|
|
#ifdef USE_GET_SYSCALL_RESULT_REGS
|
|
# include "get_syscall_result.c"
|
|
#endif
|
|
#include "get_error.c"
|
|
#if defined X86_64 || defined POWERPC
|
|
# include "getregs_old.c"
|
|
#endif
|