Sun May 9 02:18:30 CEST 1999 Wichert Akkerman * Merge in patches from Andreas Schwab + some layout and other minor fixes + add some m68k-specific things to linux/syscallent.h. Note that m68k is similar enough to i386 to not need it's own subdirectory + add support for sendfile and mremap syscalls for Linux * Merge in patches from Sascha Schumann + ioctls.h vs sys/ioctl.h on Alpha platform + pointer was casted to an int in stream.c + strsignal() needs -D_GNU_SOURCE in CFLAGS + several other casts changed + correct ARM/POWERPC architecture defines in acconfig.h * Merge in patches from Morten Welinder + add some autoconf-tests for includefiles + handle solaris version of sigcontext struct (actually I hacked this up again, but the idea is his :) Sun Apr 18 22:32:42 CEST 1999 Wichert Akkerman * Update syscalls for linux alpha, patch from Bart Warmerdam * Update sparc code so it actually compiles Fri Apr 16 02:18:05 CEST 1999 Wichert Akkerman * Add support for old_*stat functions for Linux. Please note you need to use reasonably recent kernel headers to compile strace now. * Change references to LINUX into linux in file.c * Fix include for LDT in mem.c Thu Apr 15 22:28:15 CEST 1999 Wichert Akkerman * Change in strace maintainership, jrs passed the torch to me. * Use autoconf 2.13 * Incorporate all changes already made in the Debian strace package: + compiles with more Linux kernels + added support for more Linux architectures + add support for a lot of extra syscalls + fix some problems with hanging children + check stray syscall after execv + decode capget and capset arguments + add more constants to net.c + detect ROSE networking + add more protocol families to domains + add IPIP protocol + added MSG_PROXY and MSG_CTRUNC to msg_flags + added SO_BSDCOMPAT and SO_REUSEPORT to sockoptions + added IP, IPX and TCP-options + added IP, IPX and TCP support to get-/setsockopt() + added IPX support + updated handling of signals Sun Oct 27 22:28:00 1996 J. Richard Sladkey * util.c (umovestr) [LINUX]: Handle Linux like SunOS4 instead of SVR4. That is, read a few bytes at a time to avoid overrunning the end of the stack. Fri May 31 01:48:49 1996 J. Richard Sladkey * version.c: Version 3.1 is released. Thu May 23 01:04:43 1996 J. Richard Sladkey * aclocal.m4 (AC_DECL_SYS_ERRLIST): Try looking in stdio.h as well since that's where glibc declares it. Go figure. * signal.c (sys_sigreturn) [ALPHA]: Use sigcontext instead of sigcontext_struct since glibc v5+ apparently plays games with the native OS namespace. From David Mosberger-Tang . Mon May 20 23:17:14 1996 J. Richard Sladkey * version.c: Version 3.0.14 is released. * aclocal.m4 (AC_STRUCT_MSG_CONTROL): New macro. * configure.in: Add call to AC_STRUCT_MSG_CONTROL. * net.c (printmsghdr): Handle BSD 4.3 and 4.4 msghdr members differently. Reported by Henrik Storner . * configure.in: (AC_CHECK_{HEADERS,FUNCS}): Add checks for sys/filio.h and sys/stream.h and remove check for poll. * desc.c (decode_select, sys_select, sys_oldselect) [LINUX]: Handle old and new styles of argument passing for select on Linux. * ioctl.c, stream.c: Conditionalize stream code on presence of sys/stream.h instead of poll because glibc implements poll but not the rest of the stream interface. * signal.c [LINUX]: Standardize on the name sigcontext_struct. (sys_sigprocmask) [ALPHA]: Handle OSF flavor which is more like sigsetmask. * term.c (term_ioctl): Use _VMIN, if present, for TC{G,S}ETA*. * util.c (umoven, umovestr): Move data in long-sized chunks at a time, instead of hard coding it to be 4. From David Mosberger-Tang . Mon May 20 01:19:36 1996 J. Richard Sladkey * version.c: Version 3.0.13 is released. * configure.in (AC_CHECK_HEADERS): Add check for asm/sigcontext.h. * signal.c [HAVE_ASM_SIGCONTEXT_H]: Conditionally include asm/sigcontext.h to define sigcontext_struct and don't define it locally if the header is present. * syscall.c (nerrnos{0,2}): Correct size computation. * Makefile.in: Remove dependencies and rules relating to files normally found in the os directory. Because of the new scheme we don't know precisely where they come from. Sigh. * signalent.sh: Make it work for sunos4, linux, and svr4. * {sunos4,linux{,/alpha},svr4}/Makefile.in: Make rules correspond to traditional make syntax. Add signalent.h to files which can unconditionally be rebuilt. Prevent signalent.h from being unconditionally being rebuilt since it's customized. * {sunos4,linux{,/alpha},svr4}/{ioctlent,errnoent,signalent}.h: Use versions built by {ioctlent,errnoent,signaltent}.sh. * sunos4/ioctlent.sh: Work around sprintf troubles with SunOS 4.1.4 and gcc 2.7.2. Sun May 19 17:14:09 1996 J. Richard Sladkey * configure.in, Makefile.in: Add OSARCH concept to finish build support for the alpha. * Makefile.in, linux/Makefile.in: Rewrite clean, distclean, and maintainer-clean rules. * defs.h, ioctlsort.c: Make ioctl code member unsigned. * ioctl.c, ioctlsort.c (compare): Perform explicit checking for less, greater, and equal since subtraction on two's complement numbers isn't an order relation (it isn't transitive)! * linux/Makefile.in: Add rules for the signalent.h file. * linux/alpha/Makefile.in: New file. Sun May 19 01:12:28 1996 J. Richard Sladkey * version.c: Version 3.0.12 is released. * linux{,alpha}/ioctlent.sh: Tweak for recent kernels. From Michael E Chastain . * defs.h (SUPPORTED_PERSONALITES, DEFAULT_PERSONALITY): New. * syscall.c (set_personality): New. * strace.c (main): Call set_personality. * defs.h, syscall.c, ioctl.c, signal.c: Make sysent, errnoent, ioctlent, and signalent indirect pointers and redirect them based on personality. * {sunos4,svr4,linux{,/alpha}}/signalent.h: New files. Suggested by Tom Dyas . * util.c (upeek): Handle case where ptrace returns a long and sizeof(long) != sizeof(int). From Richard Henderson Fri May 17 21:03:36 1996 J. Richard Sladkey * version.c: Version 3.0.11 is released. * many files: Fix more printf warnings for other platforms. * ipc.c (sys_msgrcv) [LINUX]: Conditionalize definition of ipc_wrapper. * linux/dummy.h: Handle missing library support for {send,recv}msg. Reported by Thomas Bogendoerfer . * linux/syscall.h (sys_utimes): Fix a typo in the declaration. From Thomas Bogendoerfer . Fri May 17 00:50:06 1996 J. Richard Sladkey * version.c: Version 3.0.10 is released. * Makfile.in: Add os/arch to includes so that a given arch (like alpha) can override the native arch (like i386). * configure.in: Check for sendmsg. * net.c: Make sendmsg and recvmsg dependent on an autoconf test. Reported by Michael E Chastain . * acconfig.h, configure.in: Detect the alpha. * ioctl.c: Handle the alpha. * defs.h: Make some members long for the alpha. Define some register nicknames. Add support for WAITEXECVE. * file.c [ALPHA]: Support the alpha for statfs. Add osf_statfs and osf_fstatfs for the alpha. Make damn sure major and minor results are suitable for passing to printf. * signal.c, syscall.c: Support the alpha. * process.c: Add alpha user offsets. * most files: Use %l? for printf arguments since most are now longs for the alpha. * linux/alpha/{errnoent.h,ioctlent.{h,sh},syscallent.h}: New for the alpha. From Thomas Bogendoerfer . Wed May 15 00:29:37 1996 J. Richard Sladkey * version.c: Version 3.0.9 is released. * config.in, config.sub, install-sh: Upgrade to autoconf 2.10. * linux/dummy.h, linux/syscallent.h, linux/syscall.h: Add recent Linux kernel version system calls. Wed Mar 13 01:03:38 1996 J. Richard Sladkey * ipc.c [SUNOS4]: Add SunOS support for decoding IPC calls. * syscall.c [SUNOS4]: Compile decode_subcall on SunOS and decode IPC calls using it. * sunos4/dummy.h: Alias sys_semop to printargs. * sunos4/syscall.h: Add new pseudo syscalls for IPC. * sunos4/syscallent.h: Include new subcalls for IPC. From Matthias Pfaller . Tue Feb 13 22:08:25 1996 J. Richard Sladkey * version.c: Version 3.0.8 is released. * time.c [LINUX]: Explicitly include linux/version.h. * strace.c (main): Don't let them even *try* to get strace to attach to itself since some systems don't handle this case very gracefully. Reported by David S. Miller . * Makefile.in (distclean): Fix it for subdirectories. * sunos4/syscallent.h, svr4/syscallent.h: Fill in the new sys_flags member for each defined system call. Fri Dec 8 01:17:28 1995 Rick Sladkey * defs.h (TRACE_*): New flags to describe what class of system call each system call is. (sysent): Add sys_flags member. * syscall.c (sysent): Define (and later undef) abbreviations for the system call class flags. (lookup_class): New function to translate strings to system call class flags. (qualify): Handle new system call class mechanism. * linux/syscallent.h: Fill in the new sys_flags member for each defined system call. * defs.h (print_sock): Remove redundant and non-K&R C compatible prototype. From Juergen Weigert . Thu Dec 7 01:17:40 1995 Rick Sladkey * linux/ioctlent.sh: Tweak to improve ioctl accuracy. From Michael E Chastain . * system.c (includes) [LINUX]: Add linux/nfs.h for recent kernels. From Michael E Chastain . Wed Dec 6 21:52:28 1995 Rick Sladkey * file.c (sprintfstype): Enclose string result in double quotes. * time.c (sys_adjtimex) [LINUX]: Conditionalize constantly evolving timex structure. From Aaron Ucko . * defs.h, syscall.c, strace.c: Rename syscall to trace_syscall and change prototype and all callers because of broken Linux shared libraries. From Aaron Ucko . * Makefile.in (clean): Check for a file with test -f not test -d. From Aaron Ucko . Tue Sep 26 02:32:31 1995 Rick Sladkey * version.c: Version 3.0.7 is released. * util.c (string_quote): Fix thinko which caused core dumps for strings with quotes in them. Reported by Marty Leisner . * linux/Makefile.in (errnoent.h rule): Grab all errno.h files from /usr/include, not just the linux one. From Michael E Chastain . * linux/errnoent.sh: Total rewrite to handle more ioctls with fewer false positives on more kernel flavors. From Michael E Chastain . Mon Sep 4 01:29:22 1995 Rick Sladkey * version.c: Version 3.0.6 is released. * linux/dummy.h, linux/syscall.h, linux/syscallent.h: Add sys_msync. * mem.c (mctl_funcs, mctl_lockas, sys_mctl): Conditionalize on MC_SYNC instead of HAVE_MCTL. (mctl_sync): Conditionalize on MS_ASYNC instead of HAVE_MCTL. (sys_msync): New function. Sat Sep 2 12:06:04 1995 Rick Sladkey * linux/dummy.h, linux/syscall.h, linux/syscallent.h: Add sys_flock and sys_getdents. * desc.c (flockcmds, sys_flock): Conditionalize on LOCK_SH not SUNOS4. * file.c (sys_getdents): Define unconditionally and handle LINUX case. * strace.c (main): Disallow username option unless both real and effective uids are root. Wed Aug 30 01:29:58 1995 Rick Sladkey * strace.c (main): Ensure that run_uid and run_gid are always set to something meaningful. (main, newoutf) [!SVR4]: Swap real and effective uids while opening any output files. (main) [!SVR4]: Treat effective uid of root as a request to handle suid binaries correctly using the real uid of the invoking user. Sat Aug 19 00:06:08 1995 Rick Sladkey * Makefile.in: Add `|| true' to clean rule because although GNU make 3.74 uses `sh -c' to invoke commands every other make in the world uses `sh -ec'. * syscall.c (syscall) [SVR4, MIPS]: The fifth and subsequent arguments appear to be stored on the stack, not in the registers following A3 (empirical result). * defs.h: Add prototype for printsock. * svr4/dummy.h: Remove generic handling of sys_mount. * system.c [SVR4, MIPS]: Include several system headers to cleanly get access to SGI mount information. (mount_flags, nfs_flags) [SVR4, MIPS]: New objects. (sys_mount) [SVR4, MIPS]: New function. (sys_mount) [SVR4, !MIPS]: New function. Tue Jul 4 00:30:34 1995 Rick Sladkey * version.c: Version 3.0.5 is released. * desc.c, resource.c, strace.c, syscall.c, time.c: Cast tv_sec and tv_usec members to long when using printf. * ipc.c: Omit define of __KERNEL__. ({MSG,SEM,SHM}_{STAT,INFO}): Explicitly define those things we want which __KERNEL__ used to provide. (sys_msgrcv): Change reference to ipc_kludge structure to look-alike ipc_wrapper to avoid dependence on __KERNEL__. mem.c (mmap_flags) [MAP_{GROWSDOWN,DENYWRITE,EXECUTABLE}]: Add Linux specific options. syscall.c: Use SYS_ERRLIST_DECLARED instead of guessing. [E{RESTART{SYS,NO{INTR,HAND}},NOIOCTLCMD}]: Explicitly define instead of depending of __KERNEL__. term.c: Cast c_{i,o,c,l}flag to long when using printf. Tue Jun 6 00:27:48 1995 Rick Sladkey * aclocal.m4 (AC_DECL_SYS_ERRLIST, AC_DECL__SYS_SIGLIST): New. * configure.in: Call AC_DECL_SYS_ERRLIST, AC_DECL_SYS_SIGLIST, and AC_DECL__SYS_SIGLIST. * acconfig.h (SYS_ERRLIST_DECLARED): New. * strace.c (strerror): Use SYS_ERRLIST_DECLARED. (strsignal): Use SYS_SIGLIST_DECLARED. net.c (sys_socket): Omit inadvertent surplus comma when protocol family isn't PF_INET. util.c (dumpstr): Fix incorrect printing of one too many characters when the length is not an even multiple of 16 bytes. Reported by Juergen Weigert . Thu May 4 23:37:47 1995 Rick Sladkey * ioctl.c (compare): Change prototype to match POSIX qsort. * signal.c (sigishandled) [SVR4]: Omit everything after return. * strace.c (trace) [SVR4]: Break out of for loop instead of returning when finished so final return statement is executed. * syscall.c (internal_syscall): Add more SYS_wait* variations. (syscall) [LINUX]: Correct typo which commented out the M68K argument to ifdef. * util.c (printstr): Cast unsigned char pointer argument to char pointer in umovestr call. (dumpstr): Likewise for umoven. Wed May 3 01:10:56 1995 Rick Sladkey * version.c: Version 3.0.4 is released. * signal.c (sys_sigblock): Move after the definition of sys_sigsetmask that it calls to avoid an implicit declaration. * stream.c (transport_user_options, transport_server_options): Only needed if TI_BIND is defined. * configure.in: Add -Wno-implicit to WARNFLAGS on SunOS 4.x. * process.c (internal_fork) [SVR4]: Fix a typo that omitted the tcp arguement from the call to exiting. Add getrval2 check so no fork processing is done in the child. (printwaitn): Initialize exited so that its value is defined for all flows of execution. Tue May 2 22:39:42 1995 Rick Sladkey * linux/dummy.h: Add aliases for sysfs, personality, afs_syscall, setfsuid, setfsgid, and _llseek syscalls. * linux/syscall.h: Add prototypes for them. * linux/syscallent.h: Add them to the syscall entries table. * system.c (headers) [LINUX]: Include linux/unistd.h to get __NR_* defines and conditionally include linux/personality.h if __NR_personality is defined. (personality_options) [LINUX]: New table. (sys_personality) [LINUX]: New function. Tue May 2 00:20:39 1995 Rick Sladkey * strace.c (trace) [!SVR4]: Change forever loop to one predicated on the number of traced processes so that we can have untraced children (e.g. via popen). * strace (main) [!SVR4]: Call fake_execve to get the actual exec and its arguments into the trace. (environ): Declare it. * process.c (fake_execve): New function. (headers): Include sys/syscall.h to get SYS_* defines. * process.c (sys_execv, sys_execve): Surround argument annotations with C comment delimiters. (printargv, printargc): The arg vector is an array of char pointers not ints. * strace.c (printleader): Also check for multiple -p arguments when deciding whether to print the pid field. * strace.c (strerror) [!HAVE_STRERROR]: New function. * defs.h (strerror, strsignal): Add these prototypes if we provide the functions. * configure.in (AC_CHECK_FUNCS): Add strerror. * strace.c (main, proc_poller): Add SIGPIPE to the list of caught and blocked signals. * strace.c (main): Add username option. Verify they are root before letting them use it. Look up the ids in the password file. Set them just before executing the program. From Reuben Sumner . Sat Apr 29 00:09:56 1995 Rick Sladkey * version.c: Version 3.0.3 is released. * system.c (mount_flags) [LINUX]: Omit duplicated MS_NOSUID entry. From Reuben Sumner . * strace.c (outfname): Initialize to NULL. (main): Defer output file processing until after arguments. Allow either a pipe or a bang for command arguments. Check if outfname is NULL instead of checking outf for stderr. Reinitialize each startup TCB's outf to fix -p/-o ordering bug. (droptcb): Reset close TCB's outf to NULL instead of stderr. (tprintf): Avoid calling vfprintf if outf is NULL. * strace.c (main): Use popen if -o argument begins with a pipe. From Marty Leisner . * process.c (printstatus): Fix a typo where WIFSIGNALED was meant but WIFSTOPPED was used. * Makefile.in: Add an EXTRA_DEFS variable and use it in the .c.o rule to prevent the comment from being untrue. Fri Apr 28 22:01:56 1995 Rick Sladkey * strace.c (sys_exit): Move follow fork code to internal_exit. (sys_fork): Move follow fork code to internal_fork. (sys_execv, sys_execve): Move follow fork code to internal_exec. (sys_waitpid, sys_wait4): Move follow fork code to internal_wait. (vforking): Remove this static variable and check scno in internal_fork instead. (internal_exit, internal_fork, internal_exec, internal_wait): New functions. * defs.h: Add prototypes for the new internal_* functions. * syscall.c (syscall): Move syscall entering trace qualifier check and reprint checking after context decoding and precede them with a call to internal_syscall. Precede syscall exiting trace qualifier check with a call to internal_syscall. (internal_syscall): New function. * defs.h (struct tcb): Make scno signed. * strace.c (syscall) Make u_error signed. [LINUX, I386]: Avoid unsigned cast in eax check. * syscall.c (sys_indir): Make i, scno, and nargs signed. * desc.c (sys_select): Make cumlen unsigned Mon Apr 24 23:52:47 1995 Rick Sladkey * net.c (socktypes): Add SOCK_PACKET. Sun Apr 2 23:50:39 1995 Rick Sladkey * Makefile (clean): Check explicitly for a Makefile in subdirs before running make in them. Sun Mar 26 12:37:21 1995 Rick Sladkey * strace.c [MIPS] (proc_open): Conditionalize run on MIPS. [MIPS] (detach): Initialize error for MIPS case. (trace): Initialize ioctl_result and ioctl_errno for overly helpful compilers. * syscall.c (decode_subcall): Move variable i into conditionals that use use it. * system.c (syssgi_options): Conditionalize SGI_RECVLMSG and SGI_SET_FPDEBUG that SGI decided to drop. I don't have the stomach to change them all. * term.c (term_ioctl): Force [c_[iocl]flags members to long before printing since we don't know what the size of their type is. * util.c [SVR4, MIPS] (umoven): Prevent MIPS from using pread even if autoconf detects it since it seems to either not work or do something else entirely on Irix 5.3. Sun Mar 26 00:01:11 1995 Rick Sladkey * version.c: Version 3.0.2 is released. * linux/dummy.h: Make sys_fchdir like sys_close instead of printargs so that the file descriptor arg is decimal. Sat Mar 25 22:50:13 1995 Rick Sladkey * net.c [LINUX] (protocols): Explicitly define all IPPROTO_* entries because on Linux they are enumerators. * system.c [LINUX] (mount_flags): Handle renaming of MS_SYNC to MS_SYNCHRONOUS. * util.c (printxval): When there is no translation, print the actual number first and the the default value as a C comment. * net.c (sys_send, sys_sendto, sys_sendmsg, sys_getsockopt, sys_setsockopt): Change first argument from unsigned to signed to cater to the frequent practice of calling system calls with a file descriptor of -1. * mem.c (sys_mmap): Likewise. Sun Mar 19 13:53:52 1995 Rick Sladkey * signal.c [LINUX] (signalent): Handle old and new values of SIGIO. Sun Dec 11 22:51:51 1994 Rick Sladkey * version.c: Version 3.0.1 is released. * Makefile.in, configure.in, aclocal.m4: Changes for autoconf 2.0. * config.guess, config.guess: Update from the FSF. * install-sh: New from the FSF. Mon Dec 5 20:51:29 1994 Rick Sladkey * Makefile.in: Add m68k arch. * acconfig.h (M68K): Add m68k define. * configure.in: Add detection of arch m68k. * process.c [M68K] (struct_user_offsets): Support m68k registers and offsets. * signal.c [M68K] (sigcontext_struct): Support m68k sigcontext structure. [M68K] (sys_sigreturn): Support m68k sigreturn handling. * syscall.c [M68K] (syscall): Support m68k syscall number register and errno in d0 instead of eax. * util.c [M68K] (getpc, printcall, setbpt, clearbpt): Support m68k program counter in PT_PC instead of EIP. [M68K] (LOOP): Support m68k loop instruction. From Andreas Schwab . * mem.c [MAP_ANONYMOUS] (mmap_flags): Correct inadvertent reference to MAP_FIXED instead of MAP_ANONYMOUS. From Andreas Schwab . * signal.c [LINUX] (signalent): Signal 30 is now SIGPWR. From Andreas Schwab . Mon Dec 5 01:05:46 1994 Rick Sladkey * defs.h (tprintf): Fix typo in non-gcc ansi prototype for tprintf. Reported by Thanh Ma . * strace.c (cleanup): Send SIGCONT before SIGTERM because Linux 1.1.62 doesn't continue a traced child when the parent exits. Reported by Matt Day . * system.c [LINUX]: Include netinet/in.h before arpa/inet.h. * util.c (printstr): Fix longstanding bug in notating string continuation. * strace.c [SVR4] (proc_open): Specifically wait for the child the child to go into the execve syscall to avoid spurious traces. [LINUX] (detach): Conditionalize the status variable. Sun Dec 4 23:21:42 1994 Rick Sladkey * Makefile.in: Add mips arch. * acconfig.h (MIPS): Add mips define. * configure.in: Add detection of opsys irix5 and arch mips. Check for prctl function. Check for sys/sysconfig.h header. * defs.h (MAX_ARGS): Bump maximum syscall arguments from 8 to 32. * file.c [SVR4]: Include sys/cred.h. (access_flags): Update access flags for SGI. (sprinttime): Change type of sprinttime argument from unsigned long to time_t. * process.c [HAVE_PRCTL]: Include sys/prctl.h. [HAVE_PRCTL] (prctl_options, sys_prctl): New for SGI. (printsiginfo): Conditionally compile SI_TIMER and SI_MESGQ. Cast si_band member to long before printing. * signal.c (sigact_flags): Add _SA_BSDCALL for SGI. (sigprocmaskcmds): Add SIG_SETMASK32 for SGI. * strace.c [SVR4] [MIPS]: (foobar): New dummy signal handler. (main): Install a dummy signal handler in the child before pausing to work around an SGI bug in PRSABORT. (proc_open): Send a interrupt to the child instead of aborting the syscall which doesn't work on Irix5.2. * svr4/dummy.h: Add new unfinished SGI syscalls (e.g. sys_sysmp, sys_sginap, etc.). Handle some SGI syscalls like existing calls (e.g. sys_ksigaction like sys_sigaction). Printargs does the print thing for sys_sethostid. * svr4/syscall.h: Declare all new SGI syscalls. (SGI_KLUDGE): Define syscall table starting index to be 1 for SGI and add it to all subcall entry points. (SYS_pgrpsys_subcall, SYS_sigcall_subcall, SYS_context): Don't decode as subcalls on MIPS. Instead, use the normal syscalls. * svr4/syscallent.h [MIPS]: Lead syscall table with a dummy entry since SGI syscall numbers are off by one. [MIPS] (sys_pgrpsys): Rename to sys_setpgrp on SGI. [MIPS] (sys_xenix): Rename to sys_syssgi on SGI. [MIPS] (sys_sysmachine): Rename to sys_sysmips on SGI. [MIPS]: Conditionalize SVR4 extension into SGI and Solaris classes. * syscall.c (dumpio): Validate descriptor against MAX_QUALS. [HAVE_PR_SYSCALL] (syscall): Conditionalize SYS_vfork. [MIPS] (syscall): Add SGI section for decoding u_error and u_rval. Add workaround for broken SGI pr_sysarg on syscall entry. [SVR4] (syscall): Conditionalize subcall decoding for SYS_ptrpsys_subcall, SYS_sigcall_subcall and SYS_context_subcall. [SVR4] [MIPS] (getrval2): Handle SGI. * syscallent.sh: Dork the sed line to be choosier about SYS_ lines. * system.c [HAVE_SYSCONFIG_H]: Include sys/sysconfig.h. [MIPS] (syssgi_options, sys_syssgi): New for SGI.