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Wichert Akkerman76baf7c1999-02-19 00:21:36 +00001/*
2 * Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
3 * Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
4 * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000028 */
29
Roland McGrath795edb12005-02-02 04:44:57 +000030#ifdef HAVE_CONFIG_H
Denys Vlasenko329655a2012-02-25 02:42:32 +010031# include "config.h"
Roland McGrath795edb12005-02-02 04:44:57 +000032#endif
Roland McGrathe6d3a292003-01-14 09:46:18 +000033#ifdef _LARGEFILE64_SOURCE
34/* This is the macro everything checks before using foo64 names. */
35# ifndef _LFS64_LARGEFILE
36# define _LFS64_LARGEFILE 1
37# endif
38#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010039#ifdef MIPS
40# include <sgidefs.h>
41#endif
42#include <features.h>
Denys Vlasenkoa6d91de2012-03-16 12:02:22 +010043#ifdef HAVE_STDBOOL_H
44# include <stdbool.h>
45#endif
46#include <stdint.h>
47#include <inttypes.h>
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010048#include <sys/types.h>
Denys Vlasenkoa6d91de2012-03-16 12:02:22 +010049#ifdef STDC_HEADERS
50# include <stddef.h>
51#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010052#include <unistd.h>
53#include <stdlib.h>
54#include <stdio.h>
55#include <ctype.h>
56#include <string.h>
Denys Vlasenkoa6d91de2012-03-16 12:02:22 +010057#include <errno.h>
58#include <signal.h>
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010059#include <time.h>
60#include <sys/time.h>
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +010061#include <sys/syscall.h>
Roland McGrathe6d3a292003-01-14 09:46:18 +000062
Denys Vlasenko29898142012-03-15 15:02:49 +010063#ifndef HAVE_STRERROR
64const char *strerror(int);
65#endif
Denys Vlasenko29898142012-03-15 15:02:49 +010066#ifndef HAVE_STPCPY
67/* Some libc have stpcpy, some don't. Sigh...
68 * Roll our private implementation...
69 */
70#undef stpcpy
71#define stpcpy strace_stpcpy
72extern char *stpcpy(char *dst, const char *src);
73#endif
74
75#if !defined __GNUC__
76# define __attribute__(x) /*nothing*/
77#endif
78
Denys Vlasenko513e9c22012-03-21 14:39:22 +010079#ifndef offsetof
80# define offsetof(type, member) \
81 (((char *) &(((type *) NULL)->member)) - ((char *) (type *) NULL))
82#endif
83
Denys Vlasenko29898142012-03-15 15:02:49 +010084#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
85
Denys Vlasenkoe4cc7c52012-03-23 11:29:01 +010086/* Glibc has an efficient macro for sigemptyset
87 * (it just does one or two assignments of 0 to internal vector of longs).
88 */
89#if defined(__GLIBC__) && defined(__sigemptyset) && !defined(sigemptyset)
90# define sigemptyset __sigemptyset
91#endif
92
Denys Vlasenkod9560c12011-08-19 17:41:28 +020093/* Configuration section */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +000094#ifndef MAX_QUALS
Denys Vlasenko329655a2012-02-25 02:42:32 +010095# if defined(MIPS)
96# define MAX_QUALS 7000 /* maximum number of syscalls, signals, etc. */
97# else
98# define MAX_QUALS 2048 /* maximum number of syscalls, signals, etc. */
99# endif
Wichert Akkerman5ae21ea2000-05-01 01:53:59 +0000100#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000101#ifndef DEFAULT_STRLEN
Denys Vlasenko041b3ee2011-08-18 12:48:56 +0200102/* default maximum # of bytes printed in `printstr', change with -s switch */
Denys Vlasenko329655a2012-02-25 02:42:32 +0100103# define DEFAULT_STRLEN 32
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000104#endif
105#ifndef DEFAULT_ACOLUMN
Denys Vlasenko329655a2012-02-25 02:42:32 +0100106# define DEFAULT_ACOLUMN 40 /* default alignment column for results */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000107#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100108/*
109 * Maximum number of args to a syscall.
Denys Vlasenkod9560c12011-08-19 17:41:28 +0200110 *
Denys Vlasenkoaa925db2012-02-25 15:19:02 +0100111 * Make sure that all entries in all syscallent.h files have nargs <= MAX_ARGS!
Denys Vlasenko44142a72011-08-23 18:04:25 +0200112 * linux/<ARCH>/syscallent.h: all have nargs <= 6.
Denys Vlasenkod9560c12011-08-19 17:41:28 +0200113 */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000114#ifndef MAX_ARGS
Denys Vlasenko329655a2012-02-25 02:42:32 +0100115# define MAX_ARGS 6
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000116#endif
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100117/* default sorting method for call profiling */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000118#ifndef DEFAULT_SORTBY
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100119# define DEFAULT_SORTBY "time"
John Hughes58265892001-10-18 15:13:53 +0000120#endif
Denys Vlasenkod27809c2013-02-12 12:50:10 +0100121/*
122 * Experimental code using PTRACE_SEIZE can be enabled here.
Denys Vlasenko9472a272013-02-12 11:43:46 +0100123 * This needs Linux kernel 3.4.x or later to work.
124 */
125#define USE_SEIZE 1
Denys Vlasenko5c9d8f42013-02-19 15:30:12 +0100126/* For forcing NOMMU build, set to 1 */
127#define NOMMU_SYSTEM 0
128
Denys Vlasenko9472a272013-02-12 11:43:46 +0100129
Denys Vlasenko329655a2012-02-25 02:42:32 +0100130#if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_ABI32
131# define LINUX_MIPSO32
132#endif
133#if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_NABI32
134# define LINUX_MIPSN32
Denys Vlasenko329655a2012-02-25 02:42:32 +0100135#endif
136#if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_ABI64
137# define LINUX_MIPSN64
Denys Vlasenko329655a2012-02-25 02:42:32 +0100138#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000139
Denys Vlasenko9472a272013-02-12 11:43:46 +0100140#if (defined(SPARC) || defined(SPARC64) \
141 || defined(X86_64) \
142 || defined(ARM) || defined(AARCH64) \
143 || defined(AVR32) \
Christian Svensson492f81f2013-02-14 13:26:27 +0100144 || defined(OR1K) \
Denys Vlasenko9472a272013-02-12 11:43:46 +0100145 ) && defined(__GLIBC__)
Denys Vlasenko329655a2012-02-25 02:42:32 +0100146# include <sys/ptrace.h>
147#else
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000148/* Work around awkward prototype in ptrace.h. */
Denys Vlasenko329655a2012-02-25 02:42:32 +0100149# define ptrace xptrace
150# include <sys/ptrace.h>
151# undef ptrace
152# ifdef POWERPC
153# define __KERNEL__
154# include <asm/ptrace.h>
155# undef __KERNEL__
Denys Vlasenko77770bb2011-08-26 19:25:09 +0200156# endif
Denys Vlasenko329655a2012-02-25 02:42:32 +0100157extern long ptrace(int, int, char *, long);
158#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000159
Denys Vlasenko2550d482013-02-15 21:04:28 +0100160#if defined(TILE)
161# include <asm/ptrace.h> /* struct pt_regs */
162#endif
163
Denys Vlasenko9472a272013-02-12 11:43:46 +0100164#if !HAVE_DECL_PTRACE_SETOPTIONS
165# define PTRACE_SETOPTIONS 0x4200
166#endif
167#if !HAVE_DECL_PTRACE_GETEVENTMSG
168# define PTRACE_GETEVENTMSG 0x4201
169#endif
170#if !HAVE_DECL_PTRACE_GETSIGINFO
171# define PTRACE_GETSIGINFO 0x4202
172#endif
173
174#if !HAVE_DECL_PTRACE_O_TRACESYSGOOD
175# define PTRACE_O_TRACESYSGOOD 0x00000001
176#endif
177#if !HAVE_DECL_PTRACE_O_TRACEFORK
178# define PTRACE_O_TRACEFORK 0x00000002
179#endif
180#if !HAVE_DECL_PTRACE_O_TRACEVFORK
181# define PTRACE_O_TRACEVFORK 0x00000004
182#endif
183#if !HAVE_DECL_PTRACE_O_TRACECLONE
184# define PTRACE_O_TRACECLONE 0x00000008
185#endif
186#if !HAVE_DECL_PTRACE_O_TRACEEXEC
187# define PTRACE_O_TRACEEXEC 0x00000010
188#endif
189#if !HAVE_DECL_PTRACE_O_TRACEEXIT
190# define PTRACE_O_TRACEEXIT 0x00000040
191#endif
192
193#if !HAVE_DECL_PTRACE_EVENT_FORK
194# define PTRACE_EVENT_FORK 1
195#endif
196#if !HAVE_DECL_PTRACE_EVENT_VFORK
197# define PTRACE_EVENT_VFORK 2
198#endif
199#if !HAVE_DECL_PTRACE_EVENT_CLONE
200# define PTRACE_EVENT_CLONE 3
201#endif
202#if !HAVE_DECL_PTRACE_EVENT_EXEC
203# define PTRACE_EVENT_EXEC 4
204#endif
205#if !HAVE_DECL_PTRACE_EVENT_VFORK_DONE
206# define PTRACE_EVENT_VFORK_DONE 5
207#endif
208#if !HAVE_DECL_PTRACE_EVENT_EXIT
209# define PTRACE_EVENT_EXIT 6
210#endif
211
Wichert Akkermanb859bea1999-04-18 22:50:50 +0000212#if !defined(__GLIBC__)
Denys Vlasenko329655a2012-02-25 02:42:32 +0100213# define PTRACE_PEEKUSER PTRACE_PEEKUSR
214# define PTRACE_POKEUSER PTRACE_POKEUSR
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000215#endif
Denys Vlasenko9472a272013-02-12 11:43:46 +0100216
Denys Vlasenko5c9d8f42013-02-19 15:30:12 +0100217#if USE_SEIZE
Denys Vlasenko9472a272013-02-12 11:43:46 +0100218# undef PTRACE_SEIZE
219# define PTRACE_SEIZE 0x4206
220# undef PTRACE_INTERRUPT
221# define PTRACE_INTERRUPT 0x4207
222# undef PTRACE_LISTEN
223# define PTRACE_LISTEN 0x4208
224# undef PTRACE_EVENT_STOP
225# define PTRACE_EVENT_STOP 128
226#endif
227
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000228#ifdef ALPHA
Denys Vlasenko329655a2012-02-25 02:42:32 +0100229# define REG_R0 0
230# define REG_A0 16
231# define REG_A3 19
232# define REG_FP 30
233# define REG_PC 64
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000234#endif /* ALPHA */
Wichert Akkermanf90da011999-10-31 21:15:38 +0000235#ifdef MIPS
Denys Vlasenko329655a2012-02-25 02:42:32 +0100236# define REG_V0 2
237# define REG_A0 4
238# define REG_A3 7
239# define REG_SP 29
240# define REG_EPC 64
Wichert Akkermanf90da011999-10-31 21:15:38 +0000241#endif /* MIPS */
Wichert Akkermanc1652e22001-03-27 12:17:16 +0000242#ifdef HPPA
Denys Vlasenko329655a2012-02-25 02:42:32 +0100243# define PT_GR20 (20*4)
244# define PT_GR26 (26*4)
245# define PT_GR28 (28*4)
246# define PT_IAOQ0 (106*4)
247# define PT_IAOQ1 (107*4)
Wichert Akkermanc1652e22001-03-27 12:17:16 +0000248#endif /* HPPA */
Roland McGrathf5a47772003-06-26 22:40:42 +0000249#ifdef SH64
250 /* SH64 Linux - this code assumes the following kernel API for system calls:
Roland McGrathe1e584b2003-06-02 19:18:58 +0000251 PC Offset 0
252 System Call Offset 16 (actually, (syscall no.) | (0x1n << 16),
253 where n = no. of parameters.
254 Other regs Offset 24+
255
256 On entry: R2-7 = parameters 1-6 (as many as necessary)
257 On return: R9 = result. */
258
259 /* Offset for peeks of registers */
Denys Vlasenko329655a2012-02-25 02:42:32 +0100260# define REG_OFFSET (24)
261# define REG_GENERAL(x) (8*(x)+REG_OFFSET)
262# define REG_PC (0*8)
263# define REG_SYSCALL (2*8)
Roland McGrathf5a47772003-06-26 22:40:42 +0000264#endif /* SH64 */
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000265#ifdef AARCH64
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000266struct arm_pt_regs {
Denys Vlasenko28ac68f2013-02-08 12:38:51 +0100267 int uregs[18];
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000268};
Denys Vlasenko28ac68f2013-02-08 12:38:51 +0100269# define ARM_cpsr uregs[16]
270# define ARM_pc uregs[15]
271# define ARM_lr uregs[14]
272# define ARM_sp uregs[13]
273# define ARM_ip uregs[12]
274# define ARM_fp uregs[11]
275# define ARM_r10 uregs[10]
276# define ARM_r9 uregs[9]
277# define ARM_r8 uregs[8]
278# define ARM_r7 uregs[7]
279# define ARM_r6 uregs[6]
280# define ARM_r5 uregs[5]
281# define ARM_r4 uregs[4]
282# define ARM_r3 uregs[3]
283# define ARM_r2 uregs[2]
284# define ARM_r1 uregs[1]
285# define ARM_r0 uregs[0]
286# define ARM_ORIG_r0 uregs[17]
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000287#endif /* AARCH64 */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000288
Denys Vlasenko9472a272013-02-12 11:43:46 +0100289#if defined(SPARC) || defined(SPARC64)
Mike Frysinger8566c502009-10-12 11:05:14 -0400290/* Indexes into the pt_regs.u_reg[] array -- UREG_XX from kernel are all off
291 * by 1 and use Ix instead of Ox. These work for both 32 and 64 bit Linux. */
Denys Vlasenko329655a2012-02-25 02:42:32 +0100292# define U_REG_G1 0
293# define U_REG_O0 7
294# define U_REG_O1 8
295# define PERSONALITY0_WORDSIZE 4
296# define PERSONALITY1_WORDSIZE 4
Denys Vlasenko329655a2012-02-25 02:42:32 +0100297# if defined(SPARC64)
298# include <asm/psrcompat.h>
299# define SUPPORTED_PERSONALITIES 3
300# define PERSONALITY2_WORDSIZE 8
301# else
302# include <asm/psr.h>
303# define SUPPORTED_PERSONALITIES 2
304# endif /* SPARC64 */
Denys Vlasenko9472a272013-02-12 11:43:46 +0100305#endif /* SPARC[64] */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000306
Michal Ludvig0e035502002-09-23 15:41:01 +0000307#ifdef X86_64
H.J. Lu35be5812012-04-16 13:00:01 +0200308# define SUPPORTED_PERSONALITIES 3
Denys Vlasenko329655a2012-02-25 02:42:32 +0100309# define PERSONALITY0_WORDSIZE 8
310# define PERSONALITY1_WORDSIZE 4
H.J. Lu35be5812012-04-16 13:00:01 +0200311# define PERSONALITY2_WORDSIZE 4
Roland McGrathee9d4352002-12-18 04:16:10 +0000312#endif
313
H.J. Lu085e4282012-04-17 11:05:04 -0700314#ifdef X32
H.J. Lu085e4282012-04-17 11:05:04 -0700315# define SUPPORTED_PERSONALITIES 2
316# define PERSONALITY0_WORDSIZE 4
317# define PERSONALITY1_WORDSIZE 4
318#endif
319
Roland McGrath56703312008-05-20 01:35:55 +0000320#ifdef ARM
Denys Vlasenko7270de52013-02-21 15:46:34 +0100321/* one personality */
Roland McGrath56703312008-05-20 01:35:55 +0000322#endif
323
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000324#ifdef AARCH64
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000325/* The existing ARM personality, then AArch64 */
326# define SUPPORTED_PERSONALITIES 2
327# define PERSONALITY0_WORDSIZE 4
328# define PERSONALITY1_WORDSIZE 8
Steve McIntyre890a5ca2012-11-10 11:24:48 +0000329# define DEFAULT_PERSONALITY 1
330#endif
331
Andreas Schwabd69fa492010-07-12 21:39:57 +0200332#ifdef POWERPC64
Denys Vlasenko329655a2012-02-25 02:42:32 +0100333# define SUPPORTED_PERSONALITIES 2
334# define PERSONALITY0_WORDSIZE 8
335# define PERSONALITY1_WORDSIZE 4
Andreas Schwabd69fa492010-07-12 21:39:57 +0200336#endif
337
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100338#ifdef TILE
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100339# define SUPPORTED_PERSONALITIES 2
340# define PERSONALITY0_WORDSIZE 8
341# define PERSONALITY1_WORDSIZE 4
342# ifdef __tilepro__
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100343# define DEFAULT_PERSONALITY 1
344# endif
345#endif
346
Denys Vlasenko9472a272013-02-12 11:43:46 +0100347#ifndef SUPPORTED_PERSONALITIES
348# define SUPPORTED_PERSONALITIES 1
349#endif
350#ifndef DEFAULT_PERSONALITY
351# define DEFAULT_PERSONALITY 0
352#endif
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100353#ifndef PERSONALITY0_WORDSIZE
Denys Vlasenkoc52826c2012-05-15 14:28:56 +0200354# define PERSONALITY0_WORDSIZE (int)(sizeof(long))
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100355#endif
356
Denys Vlasenko329655a2012-02-25 02:42:32 +0100357#if defined(I386)
Denys Vlasenko2550d482013-02-15 21:04:28 +0100358extern struct user_regs_struct i386_regs;
Denys Vlasenko4bfb1982013-02-20 12:38:14 +0100359#elif defined(IA64)
Denys Vlasenko29898142012-03-15 15:02:49 +0100360extern long ia32;
Denys Vlasenko4bfb1982013-02-20 12:38:14 +0100361#elif defined(SPARC) || defined(SPARC64)
Denys Vlasenko48e4c1b2013-02-16 08:23:40 +0100362extern struct pt_regs sparc_regs;
Denys Vlasenko4bfb1982013-02-20 12:38:14 +0100363#elif defined(ARM)
Denys Vlasenko401374e2013-02-06 18:24:39 +0100364extern struct pt_regs arm_regs;
Denys Vlasenko4bfb1982013-02-20 12:38:14 +0100365#elif defined(TILE)
Chris Metcalf0b99a8a2013-02-05 17:48:33 +0100366extern struct pt_regs tile_regs;
367#endif
Denys Vlasenkob11322f2012-01-10 16:40:35 +0100368
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100369struct sysent {
370 unsigned nargs;
371 int sys_flags;
372 int (*sys_func)();
373 const char *sys_name;
374};
375
376struct ioctlent {
377 const char *doth;
378 const char *symbol;
379 unsigned long code;
380};
381
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000382/* Trace Control Block */
383struct tcb {
Denys Vlasenkod9ec1412011-08-20 01:39:05 +0200384 int flags; /* See below for TCB_ values */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000385 int pid; /* Process Id of this entry */
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100386 int qual_flg; /* qual_flags[scno] or DEFAULT_QUAL_FLAGS + RAW */
Denys Vlasenko92d443c2011-08-25 00:25:08 +0200387 int u_error; /* Error code */
388 long scno; /* System call number */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000389 long u_arg[MAX_ARGS]; /* System call arguments */
H.J. Lu35be5812012-04-16 13:00:01 +0200390#if defined(LINUX_MIPSN32) || defined(X32)
Denys Vlasenko9472a272013-02-12 11:43:46 +0100391 long long ext_arg[MAX_ARGS];
H.J. Ludd0130b2012-04-16 12:16:45 +0200392 long long u_lrval; /* long long return value */
393#endif
Denys Vlasenko9472a272013-02-12 11:43:46 +0100394 long u_rval; /* Return value */
Dmitry V. Levina5a839a2011-12-23 00:50:49 +0000395#if SUPPORTED_PERSONALITIES > 1
396 int currpers; /* Personality at the time of scno update */
397#endif
Andreas Schwabccdff482009-10-27 16:27:13 +0100398 int curcol; /* Output column for this process */
Denys Vlasenko92d443c2011-08-25 00:25:08 +0200399 FILE *outf; /* Output file for this process */
Wichert Akkerman43a74822000-06-27 17:33:32 +0000400 const char *auxstr; /* Auxiliary info from syscall (see RVAL_STR) */
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100401 const struct sysent *s_ent; /* sysent[scno] or dummy struct for bad scno */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000402 struct timeval stime; /* System time usage as of last process wait */
403 struct timeval dtime; /* Delta for system time usage */
404 struct timeval etime; /* Syscall entry time */
Denys Vlasenkoa61a72e2012-03-17 12:41:27 +0100405 /* Support for tracing forked processes: */
406 long inst[2]; /* Saved clone args (badly named) */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000407};
408
409/* TCB flags */
Denys Vlasenkof88837a2011-09-05 14:05:46 +0200410#define TCB_INUSE 00001 /* This table entry is in use */
Denys Vlasenko68269aa2012-03-15 13:02:31 +0100411/* We have attached to this process, but did not see it stopping yet */
Denys Vlasenkof88837a2011-09-05 14:05:46 +0200412#define TCB_STARTUP 00002
413#define TCB_IGNORE_ONE_SIGSTOP 00004 /* Next SIGSTOP is to be ignored */
Denys Vlasenkob88f9612011-08-21 18:03:23 +0200414/*
415 * Are we in system call entry or in syscall exit?
416 *
417 * This bit is set after all syscall entry processing is done.
418 * Therefore, this bit will be set when next ptrace stop occurs,
419 * which should be syscall exit stop. Other stops which are possible
420 * directly after syscall entry (death, ptrace event stop)
421 * are simpler and handled without calling trace_syscall(), therefore
422 * the places where TCB_INSYSCALL can be set but we aren't in syscall stop
423 * are limited to trace(), this condition is never observed in trace_syscall()
424 * and below.
425 * The bit is cleared after all syscall exit processing is done.
426 * User-generated SIGTRAPs and post-execve SIGTRAP make it necessary
427 * to be very careful and NOT set TCB_INSYSCALL bit when they are encountered.
428 * TCB_WAITEXECVE bit is used for this purpose (see below).
429 *
430 * Use entering(tcp) / exiting(tcp) to check this bit to make code more readable.
431 */
Denys Vlasenkof88837a2011-09-05 14:05:46 +0200432#define TCB_INSYSCALL 00010
Denys Vlasenko75fe85c2012-03-09 15:15:24 +0100433#define TCB_ATTACHED 00020 /* It is attached already */
434/* Are we PROG from "strace PROG [ARGS]" invocation? */
Denys Vlasenko513e9c22012-03-21 14:39:22 +0100435#define TCB_STRACE_CHILD 0040
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000436#define TCB_BPTSET 00100 /* "Breakpoint" set after fork(2) */
Denys Vlasenko513e9c22012-03-21 14:39:22 +0100437#define TCB_REPRINT 00200 /* We should reprint this syscall on exit */
438#define TCB_FILTERED 00400 /* This system call has been filtered out */
Roland McGratheb9e2e82009-06-02 16:49:22 -0700439/* x86 does not need TCB_WAITEXECVE.
Denys Vlasenkod27809c2013-02-12 12:50:10 +0100440 * It can detect post-execve SIGTRAP by looking at eax/rax.
441 * See "not a syscall entry (eax = %ld)\n" message.
442 *
443 * Note! On new kernels (about 2.5.46+), we use PTRACE_O_TRACEEXEC, which
444 * suppresses post-execve SIGTRAP. If you are adding a new arch which is
445 * only supported by newer kernels, you most likely don't need to define
446 * TCB_WAITEXECVE!
Denys Vlasenkobc161ec2009-01-02 18:02:45 +0000447 */
Denys Vlasenkod27809c2013-02-12 12:50:10 +0100448#if defined(ALPHA) \
449 || defined(SPARC) || defined(SPARC64) \
450 || defined(POWERPC) \
451 || defined(IA64) \
452 || defined(HPPA) \
453 || defined(SH) || defined(SH64) \
454 || defined(S390) || defined(S390X) \
Denys Vlasenkobf357fc2013-02-12 13:06:51 +0100455 || defined(ARM) \
Denys Vlasenkod27809c2013-02-12 12:50:10 +0100456 || defined(MIPS)
Denys Vlasenkob88f9612011-08-21 18:03:23 +0200457/* This tracee has entered into execve syscall. Expect post-execve SIGTRAP
458 * to happen. (When it is detected, tracee is continued and this bit is cleared.)
459 */
Denys Vlasenko513e9c22012-03-21 14:39:22 +0100460# define TCB_WAITEXECVE 01000
Denys Vlasenko329655a2012-02-25 02:42:32 +0100461#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000462
463/* qualifier flags */
Denys Vlasenko74ec14f2013-02-21 16:13:47 +0100464#define QUAL_TRACE 0x001 /* this system call should be traced */
465#define QUAL_ABBREV 0x002 /* abbreviate the structures of this syscall */
466#define QUAL_VERBOSE 0x004 /* decode the structures of this syscall */
467#define QUAL_RAW 0x008 /* print all args in hex for this syscall */
468#define QUAL_SIGNAL 0x010 /* report events with this signal */
469#define QUAL_FAULT 0x020 /* report events with this fault */
470#define QUAL_READ 0x040 /* dump data read on this file descriptor */
471#define QUAL_WRITE 0x080 /* dump data written to this file descriptor */
472#define UNDEFINED_SCNO 0x100 /* Used only in tcp->qual_flg */
473
474#define DEFAULT_QUAL_FLAGS (QUAL_TRACE | QUAL_ABBREV | QUAL_VERBOSE)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000475
476#define entering(tcp) (!((tcp)->flags & TCB_INSYSCALL))
477#define exiting(tcp) ((tcp)->flags & TCB_INSYSCALL)
478#define syserror(tcp) ((tcp)->u_error != 0)
479#define verbose(tcp) (qual_flags[(tcp)->scno] & QUAL_VERBOSE)
480#define abbrev(tcp) (qual_flags[(tcp)->scno] & QUAL_ABBREV)
Grant Edwards8a082772011-04-07 20:25:40 +0000481#define filtered(tcp) ((tcp)->flags & TCB_FILTERED)
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000482
483struct xlat {
484 int val;
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000485 const char *str;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000486};
487
Denys Vlasenkof535b542009-01-13 18:30:55 +0000488extern const struct xlat open_mode_flags[];
489extern const struct xlat addrfams[];
490extern const struct xlat struct_user_offsets[];
491extern const struct xlat open_access_modes[];
Denys Vlasenko86738a22013-02-17 14:31:55 +0100492extern const struct xlat whence_codes[];
Denys Vlasenkof535b542009-01-13 18:30:55 +0000493
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000494/* Format of syscall return values */
495#define RVAL_DECIMAL 000 /* decimal format */
496#define RVAL_HEX 001 /* hex format */
497#define RVAL_OCTAL 002 /* octal format */
498#define RVAL_UDECIMAL 003 /* unsigned decimal format */
H.J. Ludd0130b2012-04-16 12:16:45 +0200499#if defined(LINUX_MIPSN32) || defined(X32)
500# if 0 /* unused so far */
501# define RVAL_LDECIMAL 004 /* long decimal format */
502# define RVAL_LHEX 005 /* long hex format */
503# define RVAL_LOCTAL 006 /* long octal format */
504# endif
505# define RVAL_LUDECIMAL 007 /* long unsigned decimal format */
506#endif
507#define RVAL_MASK 007 /* mask for these values */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000508
509#define RVAL_STR 010 /* Print `auxstr' field after return val */
510#define RVAL_NONE 020 /* Print nothing */
511
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000512#define TRACE_FILE 001 /* Trace file-related syscalls. */
513#define TRACE_IPC 002 /* Trace IPC-related syscalls. */
514#define TRACE_NETWORK 004 /* Trace network-related syscalls. */
515#define TRACE_PROCESS 010 /* Trace process-related syscalls. */
516#define TRACE_SIGNAL 020 /* Trace signal-related syscalls. */
Roland McGrath2fe7b132005-07-05 03:25:35 +0000517#define TRACE_DESC 040 /* Trace file descriptor-related syscalls. */
Namhyung Kim96792962012-10-24 11:41:57 +0900518#define TRACE_MEMORY 0100 /* Trace memory mapping-related syscalls. */
519#define SYSCALL_NEVER_FAILS 0200 /* Syscall is always successful. */
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000520
Dmitry V. Levine3a7ef52010-03-28 19:24:54 +0000521typedef enum {
522 CFLAG_NONE = 0,
523 CFLAG_ONLY_STATS,
524 CFLAG_BOTH
525} cflag_t;
Dmitry V. Levine3a7ef52010-03-28 19:24:54 +0000526extern cflag_t cflag;
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100527extern int *qual_flags;
528extern bool debug_flag;
529extern bool Tflag;
530extern bool qflag;
531extern bool not_failing_only;
532extern bool show_fd_path;
533extern bool tracing_paths;
Denys Vlasenko8d4ca0c2013-02-06 13:18:42 +0100534extern bool need_fork_exec_workarounds;
Denys Vlasenkoeec8d5d2013-02-14 03:29:48 +0100535extern unsigned xflag;
536extern unsigned followfork;
537extern unsigned ptrace_setoptions;
538extern unsigned max_strlen;
539extern unsigned os_release;
540#undef KERNEL_VERSION
541#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
Denys Vlasenkoa50d2a82012-03-15 12:49:52 +0100542
Dmitry V. Levina7945a32006-12-13 17:10:11 +0000543enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
544
Denys Vlasenko75422762011-05-27 14:36:01 +0200545void error_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
546void perror_msg(const char *fmt, ...) __attribute__ ((format(printf, 1, 2)));
547void error_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
548void perror_msg_and_die(const char *fmt, ...) __attribute__ ((noreturn, format(printf, 1, 2)));
Denys Vlasenko1d46ba52011-08-31 14:00:02 +0200549void die_out_of_memory(void) __attribute__ ((noreturn));
Denys Vlasenko75422762011-05-27 14:36:01 +0200550
Denys Vlasenko6e4f3c12012-04-16 18:22:19 +0200551#ifdef USE_CUSTOM_PRINTF
552/*
553 * Speed-optimized vfprintf implementation.
554 * See comment in vsprintf.c for allowed formats.
555 * Short version: %h[h]u, %zu, %tu are not allowed, use %[l[l]]u.
556 *
557 * It results in strace using about 5% less CPU in user space
558 * (compared to glibc version).
559 * But strace spends a lot of time in kernel space,
560 * so overall it does not appear to be a significant win.
561 * Thus disabled by default.
562 */
563int strace_vfprintf(FILE *fp, const char *fmt, va_list args);
564#else
565# define strace_vfprintf vfprintf
566#endif
567
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000568extern void set_sortby(const char *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100569extern void set_overhead(int);
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000570extern void qualify(const char *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100571extern int trace_syscall(struct tcb *);
Denys Vlasenkoc95a88f2011-08-21 17:47:40 +0200572extern void count_syscall(struct tcb *, struct timeval *);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100573extern void call_summary(FILE *);
574
Denys Vlasenkoce7d9532013-02-05 16:36:13 +0100575#if defined(AVR32) \
576 || defined(I386) \
577 || defined(X86_64) || defined(X32) \
578 || defined(AARCH64) \
579 || defined(ARM) \
Chris Metcalfaf8dc6b2013-02-05 13:02:42 -0500580 || defined(SPARC) || defined(SPARC64) \
Christian Svensson492f81f2013-02-14 13:26:27 +0100581 || defined(TILE) \
582 || defined(OR1K)
Denys Vlasenkoce7d9532013-02-05 16:36:13 +0100583extern long get_regs_error;
584# define clear_regs() (get_regs_error = -1)
585extern void get_regs(pid_t pid);
586#else
587# define get_regs_error 0
588# define clear_regs() ((void)0)
589# define get_regs(pid) ((void)0)
590#endif
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100591extern int umoven(struct tcb *, long, int, char *);
592#define umove(pid, addr, objp) \
593 umoven((pid), (addr), sizeof(*(objp)), (char *) (objp))
594extern int umovestr(struct tcb *, long, int, char *);
595extern int upeek(struct tcb *, long, long *);
596#if defined(SPARC) || defined(SPARC64) || defined(IA64) || defined(SH)
597extern long getrval2(struct tcb *);
598#endif
599/*
600 * On Linux, "setbpt" is a misnomer: we don't set a breakpoint
601 * (IOW: no poking in user's text segment),
602 * instead we change fork/vfork/clone into clone(CLONE_PTRACE).
603 * On newer kernels, we use PTRACE_O_TRACECLONE/TRACE[V]FORK instead.
604 */
605extern int setbpt(struct tcb *);
606extern int clearbpt(struct tcb *);
607
608extern const char *signame(int);
609extern int is_restart_error(struct tcb *);
610extern int pathtrace_select(const char *);
611extern int pathtrace_match(struct tcb *);
612extern const char *getfdpath(struct tcb *, int);
613
614extern const char *xlookup(const struct xlat *, int);
615
Dmitry V. Levinccee1692012-03-25 21:49:48 +0000616extern int string_to_uint(const char *str);
Denys Vlasenkob5d43b82012-04-28 14:58:35 +0200617extern int string_quote(const char *, char *, long, int);
Dmitry V. Levinccee1692012-03-25 21:49:48 +0000618
Denys Vlasenkoc9d0fc02013-02-17 22:41:33 +0100619/* a refers to the lower numbered u_arg,
620 * b refers to the higher numbered u_arg
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100621 */
Denys Vlasenkoc9d0fc02013-02-17 22:41:33 +0100622#if HAVE_LITTLE_ENDIAN_LONG_LONG
623# define LONG_LONG(a,b) \
624 ((long long)((unsigned long long)(unsigned)(a) | ((unsigned long long)(b)<<32)))
625#else
626# define LONG_LONG(a,b) \
627 ((long long)((unsigned long long)(unsigned)(b) | ((unsigned long long)(a)<<32)))
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100628#endif
Denys Vlasenkoc9d0fc02013-02-17 22:41:33 +0100629extern int printllval(struct tcb *, const char *, int);
630
Andreas Schwabe5355de2009-10-27 16:56:43 +0100631extern void printxval(const struct xlat *, int, const char *);
632extern int printargs(struct tcb *);
Denys Vlasenko72879c62012-02-27 14:18:02 +0100633extern int printargs_lu(struct tcb *);
634extern int printargs_ld(struct tcb *);
Denys Vlasenko4924dbd2011-08-19 18:06:46 +0200635extern void addflags(const struct xlat *, int);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100636extern int printflags(const struct xlat *, int, const char *);
637extern const char *sprintflags(const char *, const struct xlat *, int);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100638extern void dumpiov(struct tcb *, int, long);
639extern void dumpstr(struct tcb *, long, int);
Denys Vlasenkob5d43b82012-04-28 14:58:35 +0200640extern void printstr(struct tcb *, long, long);
Dmitry V. Levin30145dd2010-09-06 22:08:24 +0000641extern void printnum(struct tcb *, long, const char *);
642extern void printnum_int(struct tcb *, long, const char *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100643extern void printpath(struct tcb *, long);
644extern void printpathn(struct tcb *, long, int);
Denys Vlasenkoa1d541e2012-01-20 11:04:04 +0100645#define TIMESPEC_TEXT_BUFSIZE (sizeof(long)*3 * 2 + sizeof("{%u, %u}"))
646#define TIMEVAL_TEXT_BUFSIZE TIMESPEC_TEXT_BUFSIZE
Andreas Schwabe5355de2009-10-27 16:56:43 +0100647extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
Denys Vlasenkod63b0d52012-03-23 11:26:36 +0100648#define printtv(tcp, addr) \
649 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0)
650#define printtv_special(tcp, addr) \
651 printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
Denys Vlasenkoa1d541e2012-01-20 11:04:04 +0100652extern char *sprinttv(char *, struct tcb *, long, enum bitness_t, int special);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100653extern void print_timespec(struct tcb *, long);
654extern void sprint_timespec(char *, struct tcb *, long);
John Hughes58265892001-10-18 15:13:53 +0000655#ifdef HAVE_SIGINFO_T
Andreas Schwabe5355de2009-10-27 16:56:43 +0100656extern void printsiginfo(siginfo_t *, int);
Denys Vlasenkod4d3ede2013-02-13 16:31:32 +0100657extern void printsiginfo_at(struct tcb *tcp, long addr);
John Hughes58265892001-10-18 15:13:53 +0000658#endif
Dmitry V. Levin31382132011-03-04 05:08:02 +0300659extern void printfd(struct tcb *, int);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100660extern void printsock(struct tcb *, long, int);
661extern void print_sock_optmgmt(struct tcb *, long, int);
662extern void printrusage(struct tcb *, long);
Sergei Trofimovich02a08fb2011-08-11 18:04:53 +0300663#ifdef ALPHA
664extern void printrusage32(struct tcb *, long);
665#endif
Andreas Schwabe5355de2009-10-27 16:56:43 +0100666extern void printuid(const char *, unsigned long);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100667extern void printcall(struct tcb *);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100668extern void print_sigset(struct tcb *, long, int);
669extern void printsignal(int);
Dmitry V. Levin88849682011-06-13 22:58:44 +0000670extern void tprint_iov(struct tcb *, unsigned long, unsigned long, int decode_iov);
Denys Vlasenkoe0bc2222012-04-28 14:26:18 +0200671extern void tprint_iov_upto(struct tcb *, unsigned long, unsigned long, int decode_iov, unsigned long);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100672extern void tprint_open_modes(mode_t);
673extern const char *sprint_open_modes(mode_t);
Mike Frysinger0cbed352012-04-04 22:22:01 -0400674extern void print_loff_t(struct tcb *, long);
Grant Edwards8a082772011-04-07 20:25:40 +0000675
Andreas Schwabe5355de2009-10-27 16:56:43 +0100676extern const struct ioctlent *ioctl_lookup(long);
677extern const struct ioctlent *ioctl_next_match(const struct ioctlent *);
678extern int ioctl_decode(struct tcb *, long, long);
679extern int term_ioctl(struct tcb *, long, long);
680extern int sock_ioctl(struct tcb *, long, long);
681extern int proc_ioctl(struct tcb *, int, int);
Andreas Schwabe5355de2009-10-27 16:56:43 +0100682extern int rtc_ioctl(struct tcb *, long, long);
683extern int scsi_ioctl(struct tcb *, long, long);
Dmitry V. Levin4ef6db42011-01-15 20:15:31 +0000684extern int block_ioctl(struct tcb *, long, long);
Mike Frysinger0cbed352012-04-04 22:22:01 -0400685extern int mtd_ioctl(struct tcb *, long, long);
Mike Frysingerebee04c2012-04-17 22:19:31 -0400686extern int loop_ioctl(struct tcb *, long, long);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000687
Andreas Schwabe5355de2009-10-27 16:56:43 +0100688extern int tv_nz(struct timeval *);
689extern int tv_cmp(struct timeval *, struct timeval *);
690extern double tv_float(struct timeval *);
691extern void tv_add(struct timeval *, struct timeval *, struct timeval *);
692extern void tv_sub(struct timeval *, struct timeval *, struct timeval *);
693extern void tv_mul(struct timeval *, struct timeval *, int);
694extern void tv_div(struct timeval *, struct timeval *, int);
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000695
Denys Vlasenko7de265d2012-03-13 11:44:31 +0100696/* Strace log generation machinery.
697 *
698 * printing_tcp: tcb which has incomplete line being printed right now.
699 * NULL if last line has been completed ('\n'-terminated).
700 * printleader(tcp) examines it, finishes incomplete line if needed,
701 * the sets it to tcp.
702 * line_ended() clears printing_tcp and resets ->curcol = 0.
703 * tcp->curcol == 0 check is also used to detect completeness
704 * of last line, since in -ff mode just checking printing_tcp for NULL
705 * is not enough.
706 *
707 * If you change this code, test log generation in both -f and -ff modes
708 * using:
709 * strace -oLOG -f[f] test/threaded_execve
710 * strace -oLOG -f[f] test/sigkill_rain
711 * strace -oLOG -f[f] -p "`pidof web_browser`"
712 */
713extern struct tcb *printing_tcp;
714extern void printleader(struct tcb *);
715extern void line_ended(void);
716extern void tabto(void);
717extern void tprintf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
718extern void tprints(const char *str);
719
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100720#if SUPPORTED_PERSONALITIES > 1
721extern void set_personality(int personality);
Denys Vlasenkoae8643e2013-02-15 14:55:14 +0100722extern unsigned current_personality;
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100723#else
724# define set_personality(personality) ((void)0)
725# define current_personality 0
Denys Vlasenkoae8643e2013-02-15 14:55:14 +0100726#endif
727
728#if SUPPORTED_PERSONALITIES == 1
729# define current_wordsize PERSONALITY0_WORDSIZE
730#else
731# if SUPPORTED_PERSONALITIES == 2 && PERSONALITY0_WORDSIZE == PERSONALITY1_WORDSIZE
732# define current_wordsize PERSONALITY0_WORDSIZE
733# else
734extern unsigned current_wordsize;
735# endif
Denys Vlasenko9fd4f962012-03-19 09:36:42 +0100736#endif
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000737
Denys Vlasenkoe015d2d2013-02-15 14:58:52 +0100738/* In many, many places we play fast and loose and use
739 * tprintf("%d", (int) tcp->u_arg[N]) to print fds, pids etc.
740 * We probably need to use widen_to_long() instead:
741 */
742#if SUPPORTED_PERSONALITIES > 1 && SIZEOF_LONG > 4
743# define widen_to_long(v) (current_wordsize == 4 ? (long)(int32_t)(v) : (long)(v))
744#else
745# define widen_to_long(v) ((long)(v))
746#endif
747
Denys Vlasenko39fca622011-08-20 02:12:33 +0200748extern const struct sysent *sysent;
Denys Vlasenkoafc64032011-08-23 13:29:01 +0200749extern unsigned nsyscalls;
Denys Vlasenko39fca622011-08-20 02:12:33 +0200750extern const char *const *errnoent;
Denys Vlasenkoafc64032011-08-23 13:29:01 +0200751extern unsigned nerrnos;
Roland McGrathee36ce12004-09-04 03:53:10 +0000752extern const struct ioctlent *ioctlent;
Denys Vlasenkoafc64032011-08-23 13:29:01 +0200753extern unsigned nioctlents;
Roland McGrathee36ce12004-09-04 03:53:10 +0000754extern const char *const *signalent;
Denys Vlasenkoafc64032011-08-23 13:29:01 +0200755extern unsigned nsignals;
Wichert Akkerman76baf7c1999-02-19 00:21:36 +0000756
Denys Vlasenkoc956ef02013-02-16 14:25:56 +0100757/*
758 * If you need non-NULL sysent[scno].sys_func and sysent[scno].sys_name
759 */
Denys Vlasenko5721cdb2013-02-16 13:22:38 +0100760#define SCNO_IS_VALID(scno) \
Denys Vlasenkoc956ef02013-02-16 14:25:56 +0100761 ((unsigned long)(scno) < nsyscalls && sysent[scno].sys_func)
762
763/* Only ensures that sysent[scno] isn't out of range */
764#define SCNO_IN_RANGE(scno) \
765 ((unsigned long)(scno) < nsyscalls)