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      1 /*
      2  * Copyright (c) 1991, 1992 Paul Kranenburg <pk (at) cs.few.eur.nl>
      3  * Copyright (c) 1993 Branko Lankester <branko (at) hacktic.nl>
      4  * Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs (at) 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.
     28  *
     29  *	$Id$
     30  */
     31 
     32 #ifdef HAVE_CONFIG_H
     33 #include "config.h"
     34 #endif
     35 
     36 #ifdef MIPS
     37 #include <sgidefs.h>
     38 #endif
     39 
     40 #ifdef linux
     41 #include <features.h>
     42 #endif
     43 
     44 #ifdef _LARGEFILE64_SOURCE
     45 /* This is the macro everything checks before using foo64 names.  */
     46 # ifndef _LFS64_LARGEFILE
     47 #  define _LFS64_LARGEFILE 1
     48 # endif
     49 #endif
     50 
     51 /* configuration section */
     52 #ifndef MAX_QUALS
     53 #if defined(LINUX) && defined(MIPS)
     54 #define MAX_QUALS	7000	/* maximum number of syscalls, signals, etc. */
     55 #else
     56 #define MAX_QUALS	2048	/* maximum number of syscalls, signals, etc. */
     57 #endif
     58 #endif
     59 #ifndef DEFAULT_STRLEN
     60 #define DEFAULT_STRLEN	32	/* default maximum # of bytes printed in
     61 				  `printstr', change with `-s' switch */
     62 #endif
     63 #ifndef DEFAULT_ACOLUMN
     64 #define DEFAULT_ACOLUMN	40	/* default alignment column for results */
     65 #endif
     66 #ifndef MAX_ARGS
     67 # ifdef HPPA
     68 #  define MAX_ARGS	6	/* maximum number of args to a syscall */
     69 # else
     70 #  define MAX_ARGS	32	/* maximum number of args to a syscall */
     71 # endif
     72 #endif
     73 #ifndef DEFAULT_SORTBY
     74 #define DEFAULT_SORTBY "time"	/* default sorting method for call profiling */
     75 #endif
     76 
     77 #include <sys/types.h>
     78 #include <unistd.h>
     79 #include <stdlib.h>
     80 #include <stdio.h>
     81 #include <ctype.h>
     82 #include <string.h>
     83 #include <time.h>
     84 #include <sys/time.h>
     85 #include <errno.h>
     86 
     87 #ifdef HAVE_STDBOOL_H
     88 #include <stdbool.h>
     89 #endif
     90 
     91 #ifdef STDC_HEADERS
     92 #include <stddef.h>
     93 #endif /* STDC_HEADERS */
     94 
     95 #ifdef HAVE_SIGINFO_T
     96 #include <signal.h>
     97 #endif
     98 
     99 #if defined(LINUX)
    100 #  if defined(SPARC) || defined(SPARC64)
    101 #     define LINUXSPARC
    102 #  endif
    103 #  if defined(X86_64)
    104 #     define LINUX_X86_64
    105 #  endif
    106 #  if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_ABI32
    107 #     define LINUX_MIPSO32
    108 #  endif
    109 #  if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_NABI32
    110 #     define LINUX_MIPSN32
    111 #     define LINUX_MIPS64
    112 #  endif
    113 #  if defined(MIPS) && _MIPS_SIM == _MIPS_SIM_ABI64
    114 #     define LINUX_MIPSN64
    115 #     define LINUX_MIPS64
    116 #  endif
    117 #  if defined(ARM)
    118 #     define LINUX_ARM
    119 #  endif
    120 #  if defined(AVR32)
    121 #     define LINUX_AVR32
    122 #  endif
    123 #endif
    124 
    125 #if defined(SVR4) || defined(FREEBSD)
    126 #define USE_PROCFS
    127 #else
    128 #undef USE_PROCFS
    129 #endif
    130 
    131 #ifdef FREEBSD
    132 #ifndef I386
    133 #error "FreeBSD support is only for i386 arch right now."
    134 #endif
    135 #include <machine/psl.h>
    136 #include <machine/reg.h>
    137 #include <sys/syscall.h>
    138 #endif
    139 
    140 #ifdef USE_PROCFS
    141 #include <sys/procfs.h>
    142 #ifdef HAVE_MP_PROCFS
    143 #include <sys/uio.h>
    144 #endif
    145 #ifdef FREEBSD
    146 #include <sys/pioctl.h>
    147 #endif /* FREEBSD */
    148 #else /* !USE_PROCFS */
    149 #if (defined(LINUXSPARC) || defined(LINUX_X86_64) || defined(LINUX_ARM) || defined(LINUX_AVR32)) && defined(__GLIBC__)
    150 #include <sys/ptrace.h>
    151 #else
    152 /* Work around awkward prototype in ptrace.h. */
    153 #define ptrace xptrace
    154 #include <sys/ptrace.h>
    155 #undef ptrace
    156 #ifdef POWERPC
    157 #define __KERNEL__
    158 #include <asm/ptrace.h>
    159 #undef __KERNEL__
    160 #endif
    161 #ifdef LINUX
    162 extern long ptrace(int, int, char *, long);
    163 #else /* !LINUX */
    164 extern int ptrace(int, int, char *, int, ...);
    165 #endif /* !LINUX */
    166 #endif /* !LINUXSPARC */
    167 #endif /* !SVR4 */
    168 
    169 #ifdef LINUX
    170 #if !defined(__GLIBC__)
    171 #define	PTRACE_PEEKUSER	PTRACE_PEEKUSR
    172 #define	PTRACE_POKEUSER	PTRACE_POKEUSR
    173 #endif
    174 #ifdef ALPHA
    175 #  define REG_R0 0
    176 #  define REG_A0 16
    177 #  define REG_A3 19
    178 #  define REG_FP 30
    179 #  define REG_PC 64
    180 #endif /* ALPHA */
    181 #ifdef MIPS
    182 #  define REG_V0 2
    183 #  define REG_A0 4
    184 #  define REG_A3 7
    185 #  define REG_SP 29
    186 #  define REG_EPC 64
    187 #endif /* MIPS */
    188 #ifdef HPPA
    189 #  define PT_GR20 (20*4)
    190 #  define PT_GR26 (26*4)
    191 #  define PT_GR28 (28*4)
    192 #  define PT_IAOQ0 (106*4)
    193 #  define PT_IAOQ1 (107*4)
    194 #endif /* HPPA */
    195 #ifdef SH64
    196    /* SH64 Linux - this code assumes the following kernel API for system calls:
    197           PC           Offset 0
    198           System Call  Offset 16 (actually, (syscall no.) | (0x1n << 16),
    199                        where n = no. of parameters.
    200           Other regs   Offset 24+
    201 
    202           On entry:    R2-7 = parameters 1-6 (as many as necessary)
    203           On return:   R9   = result. */
    204 
    205    /* Offset for peeks of registers */
    206 #  define REG_OFFSET         (24)
    207 #  define REG_GENERAL(x)     (8*(x)+REG_OFFSET)
    208 #  define REG_PC             (0*8)
    209 #  define REG_SYSCALL        (2*8)
    210 #endif /* SH64 */
    211 #endif /* LINUX */
    212 
    213 #define SUPPORTED_PERSONALITIES 1
    214 #define DEFAULT_PERSONALITY 0
    215 
    216 #ifdef LINUXSPARC
    217 /* Indexes into the pt_regs.u_reg[] array -- UREG_XX from kernel are all off
    218  * by 1 and use Ix instead of Ox.  These work for both 32 and 64 bit Linux. */
    219 #define U_REG_G1 0
    220 #define U_REG_O0 7
    221 #define U_REG_O1 8
    222 #define PERSONALITY0_WORDSIZE 4
    223 #define PERSONALITY1_WORDSIZE 4
    224 #undef  SUPPORTED_PERSONALITIES
    225 #if defined(SPARC64)
    226 #include <asm/psrcompat.h>
    227 #define SUPPORTED_PERSONALITIES 3
    228 #define PERSONALITY2_WORDSIZE 8
    229 #else
    230 #include <asm/psr.h>
    231 #define SUPPORTED_PERSONALITIES 2
    232 #endif /* SPARC64 */
    233 #endif /* LINUXSPARC */
    234 
    235 #ifdef X86_64
    236 #undef SUPPORTED_PERSONALITIES
    237 #define SUPPORTED_PERSONALITIES 2
    238 #define PERSONALITY0_WORDSIZE 8
    239 #define PERSONALITY1_WORDSIZE 4
    240 #endif
    241 
    242 #ifdef ARM
    243 #undef SUPPORTED_PERSONALITIES
    244 #define SUPPORTED_PERSONALITIES 2
    245 #define PERSONALITY0_WORDSIZE 4
    246 #define PERSONALITY1_WORDSIZE 4
    247 #endif
    248 
    249 #ifdef POWERPC64
    250 #undef SUPPORTED_PERSONALITIES
    251 #define SUPPORTED_PERSONALITIES 2
    252 #define PERSONALITY0_WORDSIZE 8
    253 #define PERSONALITY1_WORDSIZE 4
    254 #endif
    255 
    256 #ifdef SVR4
    257 #ifdef HAVE_MP_PROCFS
    258 extern int mp_ioctl (int f, int c, void *a, int s);
    259 #define IOCTL(f,c,a)	mp_ioctl (f, c, a, sizeof *a)
    260 #define IOCTL_STATUS(t) \
    261 	 pread (t->pfd_stat, &t->status, sizeof t->status, 0)
    262 #define IOCTL_WSTOP(t)						\
    263 	(IOCTL (t->pfd, PCWSTOP, (char *)NULL) < 0 ? -1 :		\
    264 	 IOCTL_STATUS (t))
    265 #define PR_WHY		pr_lwp.pr_why
    266 #define PR_WHAT		pr_lwp.pr_what
    267 #define PR_REG		pr_lwp.pr_context.uc_mcontext.gregs
    268 #define PR_FLAGS	pr_lwp.pr_flags
    269 #define PR_SYSCALL	pr_lwp.pr_syscall
    270 #define PR_INFO		pr_lwp.pr_info
    271 #define PIOCSTIP	PCSTOP
    272 #define PIOCSET		PCSET
    273 #define PIOCRESET	PCRESET
    274 #define PIOCSTRACE	PCSTRACE
    275 #define PIOCSFAULT	PCSFAULT
    276 #define PIOCWSTOP	PCWSTOP
    277 #define PIOCSTOP	PCSTOP
    278 #define PIOCSENTRY	PCSENTRY
    279 #define PIOCSEXIT	PCSEXIT
    280 #define PIOCRUN		PCRUN
    281 #else
    282 #define IOCTL		ioctl
    283 #define IOCTL_STATUS(t)	ioctl (t->pfd, PIOCSTATUS, &t->status)
    284 #define IOCTL_WSTOP(t)	ioctl (t->pfd, PIOCWSTOP, &t->status)
    285 #define PR_WHY		pr_why
    286 #define PR_WHAT		pr_what
    287 #define PR_REG		pr_reg
    288 #define PR_FLAGS	pr_flags
    289 #define PR_SYSCALL	pr_syscall
    290 #define PR_INFO		pr_info
    291 #endif
    292 #endif
    293 #ifdef FREEBSD
    294 #define IOCTL		ioctl
    295 #define IOCTL_STATUS(t)	ioctl (t->pfd, PIOCSTATUS, &t->status)
    296 #define IOCTL_WSTOP(t)	ioctl (t->pfd, PIOCWAIT, &t->status)
    297 #define PIOCRUN         PIOCCONT
    298 #define PIOCWSTOP       PIOCWAIT
    299 #define PR_WHY		why
    300 #define PR_WHAT		val
    301 #define PR_FLAGS	state
    302 /* from /usr/src/sys/miscfs/procfs/procfs_vnops.c,
    303    status.state = 0 for running, 1 for stopped */
    304 #define PR_ASLEEP	1
    305 #define PR_SYSENTRY     S_SCE
    306 #define PR_SYSEXIT      S_SCX
    307 #define PR_SIGNALLED    S_SIG
    308 #define PR_FAULTED      S_CORE
    309 #endif
    310 
    311 #ifdef LINUX
    312 # if !HAVE_DECL_PTRACE_SETOPTIONS
    313 #  define PTRACE_SETOPTIONS	0x4200
    314 # endif
    315 # if !HAVE_DECL_PTRACE_GETEVENTMSG
    316 #  define PTRACE_GETEVENTMSG	0x4201
    317 # endif
    318 # if !HAVE_DECL_PTRACE_GETSIGINFO
    319 #  define PTRACE_GETSIGINFO	0x4202
    320 # endif
    321 # if !HAVE_DECL_PTRACE_O_TRACEFORK
    322 #  define PTRACE_O_TRACEFORK	0x00000002
    323 # endif
    324 # if !HAVE_DECL_PTRACE_O_TRACEVFORK
    325 #  define PTRACE_O_TRACEVFORK	0x00000004
    326 # endif
    327 # if !HAVE_DECL_PTRACE_O_TRACECLONE
    328 #  define PTRACE_O_TRACECLONE	0x00000008
    329 # endif
    330 
    331 # if !HAVE_DECL_PTRACE_EVENT_FORK
    332 #  define PTRACE_EVENT_FORK	1
    333 # endif
    334 # if !HAVE_DECL_PTRACE_EVENT_VFORK
    335 #  define PTRACE_EVENT_VFORK	2
    336 # endif
    337 # if !HAVE_DECL_PTRACE_EVENT_CLONE
    338 #  define PTRACE_EVENT_CLONE	3
    339 # endif
    340 #endif /* LINUX */
    341 
    342 /* Trace Control Block */
    343 struct tcb {
    344 	short flags;		/* See below for TCB_ values */
    345 	int pid;		/* Process Id of this entry */
    346 	long scno;		/* System call number */
    347 	int u_nargs;		/* System call arguments */
    348 	long u_arg[MAX_ARGS];	/* System call arguments */
    349 #if defined (LINUX_MIPSN32)
    350 	long long ext_arg[MAX_ARGS];	/* System call arguments */
    351 #endif
    352 	int u_error;		/* Error code */
    353 	long u_rval;		/* (first) return value */
    354 #ifdef HAVE_LONG_LONG
    355 	long long u_lrval;	/* long long return value */
    356 #endif
    357 	FILE *outf;		/* Output file for this process */
    358 	int curcol;		/* Output column for this process */
    359 	const char *auxstr;	/* Auxiliary info from syscall (see RVAL_STR) */
    360 	struct timeval stime;	/* System time usage as of last process wait */
    361 	struct timeval dtime;	/* Delta for system time usage */
    362 	struct timeval etime;	/* Syscall entry time */
    363 				/* Support for tracing forked processes */
    364 	struct tcb *parent;	/* Parent of this process */
    365 	int nchildren;		/* # of traced children */
    366 	int waitpid;		/* pid(s) this process is waiting for */
    367 	int nzombies;		/* # of formerly traced children now dead */
    368 #ifdef LINUX
    369 	int nclone_threads;	/* # of nchildren with CLONE_THREAD */
    370 	int nclone_waiting;	/* clone threads in wait4 (TCB_SUSPENDED) */
    371 #endif
    372 				/* (1st arg of wait4()) */
    373 	long baddr;		/* `Breakpoint' address */
    374 	long inst[2];		/* Instructions on above */
    375 	int pfd;		/* proc file descriptor */
    376 #ifdef SVR4
    377 #ifdef HAVE_MP_PROCFS
    378 	int pfd_stat;
    379 	int pfd_as;
    380 	pstatus_t status;
    381 #else
    382 	prstatus_t status;	/* procfs status structure */
    383 #endif
    384 #endif
    385 	int ptrace_errno;
    386 #ifdef FREEBSD
    387 	struct procfs_status status;
    388 	int pfd_reg;
    389 	int pfd_status;
    390 #endif
    391 };
    392 
    393 /* TCB flags */
    394 #define TCB_STARTUP	00001	/* We have just begun ptracing this process */
    395 #define TCB_INUSE	00002	/* This table entry is in use */
    396 #define TCB_INSYSCALL	00004	/* A system call is in progress */
    397 #define TCB_ATTACHED	00010	/* Process is not our own child */
    398 #define TCB_EXITING	00020	/* As far as we know, this process is exiting */
    399 #define TCB_SUSPENDED	00040	/* Process can not be allowed to resume just now */
    400 #define TCB_BPTSET	00100	/* "Breakpoint" set after fork(2) */
    401 #define TCB_SIGTRAPPED	00200	/* Process wanted to block SIGTRAP */
    402 #define TCB_FOLLOWFORK	00400	/* Process should have forks followed */
    403 #define TCB_REPRINT	01000	/* We should reprint this syscall on exit */
    404 #ifdef LINUX
    405 /* x86 does not need TCB_WAITEXECVE.
    406  * It can detect execve's SIGTRAP by looking at eax/rax.
    407  * See "stray syscall exit: eax = " message in syscall_fixup().
    408  */
    409 # if defined(ALPHA) || defined(AVR32) || defined(SPARC) || defined(SPARC64) \
    410   || defined(POWERPC) || defined(IA64) || defined(HPPA) \
    411   || defined(SH) || defined(SH64) || defined(S390) || defined(S390X) \
    412   || defined(ARM) || defined(MIPS) || defined(BFIN) || defined(TILE)
    413 #  define TCB_WAITEXECVE 02000	/* ignore SIGTRAP after exceve */
    414 # endif
    415 # define TCB_CLONE_THREAD  010000 /* CLONE_THREAD set in creating syscall */
    416 # define TCB_GROUP_EXITING 020000 /* TCB_EXITING was exit_group, not _exit */
    417 # include <sys/syscall.h>
    418 # ifndef __NR_exit_group
    419 # /* Hack: Most headers around are too old to have __NR_exit_group.  */
    420 #  ifdef ALPHA
    421 #   define __NR_exit_group 405
    422 #  elif defined I386
    423 #   define __NR_exit_group 252
    424 #  elif defined X86_64
    425 #   define __NR_exit_group 231
    426 #  elif defined IA64
    427 #   define __NR_exit_group 1236
    428 #  elif defined POWERPC
    429 #   define __NR_exit_group 234
    430 #  elif defined S390 || defined S390X
    431 #   define __NR_exit_group 248
    432 #  elif defined SPARC || defined SPARC64
    433 #   define __NR_exit_group 188
    434 #  elif defined M68K
    435 #   define __NR_exit_group 247
    436 #  endif /* ALPHA et al */
    437 # endif	/* !__NR_exit_group */
    438 #endif /* LINUX */
    439 
    440 /* qualifier flags */
    441 #define QUAL_TRACE	0001	/* this system call should be traced */
    442 #define QUAL_ABBREV	0002	/* abbreviate the structures of this syscall */
    443 #define QUAL_VERBOSE	0004	/* decode the structures of this syscall */
    444 #define QUAL_RAW	0010	/* print all args in hex for this syscall */
    445 #define QUAL_SIGNAL	0020	/* report events with this signal */
    446 #define QUAL_FAULT	0040	/* report events with this fault */
    447 #define QUAL_READ	0100	/* dump data read on this file descriptor */
    448 #define QUAL_WRITE	0200	/* dump data written to this file descriptor */
    449 
    450 #define entering(tcp)	(!((tcp)->flags & TCB_INSYSCALL))
    451 #define exiting(tcp)	((tcp)->flags & TCB_INSYSCALL)
    452 #define syserror(tcp)	((tcp)->u_error != 0)
    453 #define verbose(tcp)	(qual_flags[(tcp)->scno] & QUAL_VERBOSE)
    454 #define abbrev(tcp)	(qual_flags[(tcp)->scno] & QUAL_ABBREV)
    455 
    456 struct xlat {
    457 	int val;
    458 	const char *str;
    459 };
    460 
    461 extern const struct xlat open_mode_flags[];
    462 extern const struct xlat addrfams[];
    463 extern const struct xlat struct_user_offsets[];
    464 extern const struct xlat open_access_modes[];
    465 
    466 /* Format of syscall return values */
    467 #define RVAL_DECIMAL	000	/* decimal format */
    468 #define RVAL_HEX	001	/* hex format */
    469 #define RVAL_OCTAL	002	/* octal format */
    470 #define RVAL_UDECIMAL	003	/* unsigned decimal format */
    471 #define RVAL_LDECIMAL	004	/* long decimal format */
    472 #define RVAL_LHEX	005	/* long hex format */
    473 #define RVAL_LOCTAL	006	/* long octal format */
    474 #define RVAL_LUDECIMAL	007	/* long unsigned decimal format */
    475 #define RVAL_MASK	007	/* mask for these values */
    476 
    477 #define RVAL_STR	010	/* Print `auxstr' field after return val */
    478 #define RVAL_NONE	020	/* Print nothing */
    479 
    480 #ifndef offsetof
    481 #define offsetof(type, member)	(((char *) &(((type *) NULL)->member)) - \
    482 				 ((char *) (type *) NULL))
    483 #endif /* !offsetof */
    484 
    485 /* get offset of member within a user struct */
    486 #define uoff(member)	offsetof(struct user, member)
    487 
    488 #define TRACE_FILE	001	/* Trace file-related syscalls. */
    489 #define TRACE_IPC	002	/* Trace IPC-related syscalls. */
    490 #define TRACE_NETWORK	004	/* Trace network-related syscalls. */
    491 #define TRACE_PROCESS	010	/* Trace process-related syscalls. */
    492 #define TRACE_SIGNAL	020	/* Trace signal-related syscalls. */
    493 #define TRACE_DESC	040	/* Trace file descriptor-related syscalls. */
    494 #define SYSCALL_NEVER_FAILS	0100	/* Syscall is always successful. */
    495 
    496 typedef enum {
    497 	CFLAG_NONE = 0,
    498 	CFLAG_ONLY_STATS,
    499 	CFLAG_BOTH
    500 } cflag_t;
    501 
    502 extern struct tcb **tcbtab;
    503 extern int *qual_flags;
    504 extern int debug, followfork;
    505 extern unsigned int ptrace_setoptions;
    506 extern int dtime, xflag, qflag;
    507 extern cflag_t cflag;
    508 extern int acolumn;
    509 extern unsigned int nprocs, tcbtabsize;
    510 extern int max_strlen;
    511 extern struct tcb *tcp_last;
    512 
    513 enum bitness_t { BITNESS_CURRENT = 0, BITNESS_32 };
    514 
    515 extern int set_personality(int personality);
    516 extern const char *xlookup(const struct xlat *, int);
    517 extern struct tcb *alloc_tcb(int, int);
    518 extern struct tcb *pid2tcb(int);
    519 extern void droptcb(struct tcb *);
    520 extern void expand_tcbtab(void);
    521 
    522 #define alloctcb(pid)	alloc_tcb((pid), 1)
    523 
    524 extern void set_sortby(const char *);
    525 extern void set_overhead(int);
    526 extern void qualify(const char *);
    527 extern int get_scno(struct tcb *);
    528 extern long known_scno(struct tcb *);
    529 extern long do_ptrace(int request, struct tcb *tcp, void *addr, void *data);
    530 extern int ptrace_restart(int request, struct tcb *tcp, int sig);
    531 extern int force_result(struct tcb *, int, long);
    532 extern int trace_syscall(struct tcb *);
    533 extern int count_syscall(struct tcb *, struct timeval *);
    534 extern void printxval(const struct xlat *, int, const char *);
    535 extern int printargs(struct tcb *);
    536 extern int addflags(const struct xlat *, int);
    537 extern int printflags(const struct xlat *, int, const char *);
    538 extern const char *sprintflags(const char *, const struct xlat *, int);
    539 extern int umoven(struct tcb *, long, int, char *);
    540 extern int umovestr(struct tcb *, long, int, char *);
    541 extern int upeek(struct tcb *, long, long *);
    542 extern void dumpiov(struct tcb *, int, long);
    543 extern void dumpstr(struct tcb *, long, int);
    544 extern void printstr(struct tcb *, long, int);
    545 extern void printnum(struct tcb *, long, const char *);
    546 extern void printnum_int(struct tcb *, long, const char *);
    547 extern void printpath(struct tcb *, long);
    548 extern void printpathn(struct tcb *, long, int);
    549 extern void printtv_bitness(struct tcb *, long, enum bitness_t, int);
    550 extern void sprinttv(struct tcb *, long, enum bitness_t, char *);
    551 extern void print_timespec(struct tcb *, long);
    552 extern void sprint_timespec(char *, struct tcb *, long);
    553 #ifdef HAVE_SIGINFO_T
    554 extern void printsiginfo(siginfo_t *, int);
    555 #endif
    556 extern void printfd(struct tcb *, int);
    557 extern void printsock(struct tcb *, long, int);
    558 extern void print_sock_optmgmt(struct tcb *, long, int);
    559 extern void printrusage(struct tcb *, long);
    560 extern void printuid(const char *, unsigned long);
    561 extern int clearbpt(struct tcb *);
    562 extern int setbpt(struct tcb *);
    563 extern int sigishandled(struct tcb *, int);
    564 extern void printcall(struct tcb *);
    565 extern const char *signame(int);
    566 extern void print_sigset(struct tcb *, long, int);
    567 extern void printsignal(int);
    568 extern void printleader(struct tcb *);
    569 extern void printtrailer(void);
    570 extern void tabto(int);
    571 extern void call_summary(FILE *);
    572 extern void tprint_iov(struct tcb *, unsigned long, unsigned long);
    573 extern void tprint_open_modes(mode_t);
    574 extern const char *sprint_open_modes(mode_t);
    575 extern int is_restart_error(struct tcb *);
    576 
    577 extern int change_syscall(struct tcb *, int);
    578 extern int internal_fork(struct tcb *);
    579 extern int internal_exec(struct tcb *);
    580 extern int internal_wait(struct tcb *, int);
    581 extern int internal_exit(struct tcb *);
    582 #ifdef LINUX
    583 extern int handle_new_child(struct tcb *, int, int);
    584 #endif
    585 
    586 extern const struct ioctlent *ioctl_lookup(long);
    587 extern const struct ioctlent *ioctl_next_match(const struct ioctlent *);
    588 extern int ioctl_decode(struct tcb *, long, long);
    589 extern int term_ioctl(struct tcb *, long, long);
    590 extern int sock_ioctl(struct tcb *, long, long);
    591 extern int proc_ioctl(struct tcb *, int, int);
    592 extern int stream_ioctl(struct tcb *, int, int);
    593 #ifdef LINUX
    594 extern int rtc_ioctl(struct tcb *, long, long);
    595 extern int scsi_ioctl(struct tcb *, long, long);
    596 extern int block_ioctl(struct tcb *, long, long);
    597 #endif
    598 
    599 extern int tv_nz(struct timeval *);
    600 extern int tv_cmp(struct timeval *, struct timeval *);
    601 extern double tv_float(struct timeval *);
    602 extern void tv_add(struct timeval *, struct timeval *, struct timeval *);
    603 extern void tv_sub(struct timeval *, struct timeval *, struct timeval *);
    604 extern void tv_mul(struct timeval *, struct timeval *, int);
    605 extern void tv_div(struct timeval *, struct timeval *, int);
    606 
    607 #ifdef SUNOS4
    608 extern int fixvfork(struct tcb *);
    609 #endif
    610 #if !(defined(LINUX) && !defined(SPARC) && !defined(SPARC64) && !defined(IA64) \
    611 	&& !defined(SH))
    612 extern long getrval2(struct tcb *);
    613 #endif
    614 #ifdef USE_PROCFS
    615 extern int proc_open(struct tcb *tcp, int attaching);
    616 #endif
    617 
    618 #define umove(pid, addr, objp)	\
    619 	umoven((pid), (addr), sizeof *(objp), (char *) (objp))
    620 
    621 #define printtv(tcp, addr)	\
    622 	printtv_bitness((tcp), (addr), BITNESS_CURRENT, 0)
    623 #define printtv_special(tcp, addr)	\
    624 	printtv_bitness((tcp), (addr), BITNESS_CURRENT, 1)
    625 
    626 extern void tprintf(const char *fmt, ...)
    627 #ifdef __GNUC__
    628 	__attribute__ ((format (printf, 1, 2)))
    629 #endif
    630 	;
    631 
    632 #ifndef HAVE_STRERROR
    633 const char *strerror(int);
    634 #endif
    635 #ifndef HAVE_STRSIGNAL
    636 const char *strsignal(int);
    637 #endif
    638 
    639 extern int current_personality;
    640 extern const int personality_wordsize[];
    641 
    642 struct sysent {
    643 	int	nargs;
    644 	int	sys_flags;
    645 	int	(*sys_func)();
    646 	const char *sys_name;
    647 	long	native_scno;	/* Match against SYS_* constants.  */
    648 };
    649 
    650 extern const struct sysent *sysent;
    651 extern int nsyscalls;
    652 
    653 extern const char *const *errnoent;
    654 extern int nerrnos;
    655 
    656 struct ioctlent {
    657 	const char *doth;
    658 	const char *symbol;
    659 	unsigned long code;
    660 };
    661 
    662 extern const struct ioctlent *ioctlent;
    663 extern int nioctlents;
    664 
    665 extern const char *const *signalent;
    666 extern int nsignals;
    667 
    668 extern const struct ioctlent ioctlent0[];
    669 extern const int nioctlents0;
    670 extern const char *const signalent0[];
    671 extern const int nsignals0;
    672 
    673 #if SUPPORTED_PERSONALITIES >= 2
    674 extern const struct ioctlent ioctlent1[];
    675 extern const int nioctlents1;
    676 extern const char *const signalent1[];
    677 extern const int nsignals1;
    678 #endif /* SUPPORTED_PERSONALITIES >= 2 */
    679 
    680 #if SUPPORTED_PERSONALITIES >= 3
    681 extern const struct ioctlent ioctlent2[];
    682 extern const int nioctlents2;
    683 extern const char *const signalent2[];
    684 extern const int nsignals2;
    685 #endif /* SUPPORTED_PERSONALITIES >= 3 */
    686 
    687 #if HAVE_LONG_LONG
    688 
    689 /* _l refers to the lower numbered u_arg,
    690  * _h refers to the higher numbered u_arg
    691  */
    692 
    693 #if HAVE_LITTLE_ENDIAN_LONG_LONG
    694 #define LONG_LONG(_l,_h) \
    695     ((long long)((unsigned long long)(unsigned)(_l) | ((unsigned long long)(_h)<<32)))
    696 #else
    697 #define LONG_LONG(_l,_h) \
    698     ((long long)((unsigned long long)(unsigned)(_h) | ((unsigned long long)(_l)<<32)))
    699 #endif
    700 
    701 extern int printllval(struct tcb *, const char *, int);
    702 #endif
    703 
    704 #ifdef IA64
    705 extern long ia32;
    706 #endif
    707 
    708 extern int not_failing_only;
    709