This removes all of the architecture-specific functions from truss. A per-ABI structure is still needed to map syscall numbers to names and FreeBSD errno values to ABI error values as well as hold syscall counters. However, the linker set of ABI structures is now replaced with a simple table mapping ABI names to structures. This approach permits sharing the same ABI structure among separate names such as i386 a.out and ELF binaries as well as ELF v1 vs ELF v2 for powerpc64. A few differences are visible due to using PT_GET_SC_RET to fetch the error value of a system call. Note that ktrace/kdump have had the "new" behaviors for a long time already: - System calls that return with EJUSTRETURN or ERESTART will now be noticed and logged as such. Previously sigreturn (which uses EJUSTRETURN) would report whatever random value was in the register holding errno from the previous system call for example. Now it reports EJUSTRETURN. - System calls that return errno as their error value such as posix_fallocate() and posix_fadvise() now report non-zero return values as errors instead of success with a non-zero return value. Reviewed by: kib MFC after: 1 month Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D20963
277 lines
7.2 KiB
C
277 lines
7.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright 1997 Sean Eric Fagan
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sean Eric Fagan
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* 4. Neither the name of the author may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* System call arguments come in several flavours:
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* Hex -- values that should be printed in hex (addresses)
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* Octal -- Same as above, but octal
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* Int -- normal integer values (file descriptors, for example)
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* LongHex -- long value that should be printed in hex
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* Name -- pointer to a NULL-terminated string.
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* BinString -- pointer to an array of chars, printed via strvisx().
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* Ptr -- pointer to some unspecified structure. Just print as hex for now.
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* Stat -- a pointer to a stat buffer. Prints a couple fields.
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* Stat11 -- a pointer to a freebsd 11 stat buffer. Prints a couple fields.
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* StatFs -- a pointer to a statfs buffer. Prints a few fields.
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* Ioctl -- an ioctl command. Woefully limited.
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* Quad -- a double-word value. e.g., lseek(int, offset_t, int)
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* Signal -- a signal number. Prints the signal name (SIGxxx)
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* Sockaddr -- a pointer to a struct sockaddr. Prints symbolic AF, and IP:Port
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* StringArray -- a pointer to an array of string pointers.
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* Timespec -- a pointer to a struct timespec. Prints both elements.
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* Timeval -- a pointer to a struct timeval. Prints both elements.
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* Timeval2 -- a pointer to two struct timevals. Prints both elements of both.
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* Itimerval -- a pointer to a struct itimerval. Prints all elements.
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* Pollfd -- a pointer to an array of struct pollfd. Prints .fd and .events.
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* Fd_set -- a pointer to an array of fd_set. Prints the fds that are set.
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* Sigaction -- a pointer to a struct sigaction. Prints all elements.
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* Sigset -- a pointer to a sigset_t. Prints the signals that are set.
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* Sigprocmask -- the first argument to sigprocmask(). Prints the name.
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* Kevent -- a pointer to an array of struct kevents. Prints all elements.
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* Pathconf -- the 2nd argument of pathconf().
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* Utrace -- utrace(2) buffer.
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* CapRights -- a pointer to a cap_rights_t. Prints all set capabilities.
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*
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* In addition, the pointer types (String, Ptr) may have OUT masked in --
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* this means that the data is set on *return* from the system call -- or
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* IN (meaning that the data is passed *into* the system call).
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*/
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enum Argtype {
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None = 1,
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/* Scalar integers. */
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Socklent,
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Octal,
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Int,
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UInt,
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Hex,
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Long,
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LongHex,
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Sizet,
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Quad,
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QuadHex,
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/* Encoded scalar values. */
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Accessmode,
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Acltype,
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Atfd,
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Atflags,
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CapFcntlRights,
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Extattrnamespace,
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Fadvice,
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Fcntl,
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Fcntlflag,
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FileFlags,
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Flockop,
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Getfsstatmode,
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Idtype,
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Ioctl,
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Kldsymcmd,
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Kldunloadflags,
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Madvice,
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Minherit,
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Msgflags,
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Mlockall,
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Mmapflags,
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Mountflags,
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Mprot,
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Msync,
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Open,
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Pathconf,
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Pipe2,
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Procctl,
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Priowhich,
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Ptraceop,
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Quotactlcmd,
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Reboothowto,
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Resource,
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Rforkflags,
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Rtpriofunc,
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RusageWho,
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Schedpolicy,
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Shutdown,
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Signal,
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Sigprocmask,
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Sockdomain,
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Sockoptlevel,
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Sockoptname,
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Sockprotocol,
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Socktype,
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Sysarch,
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Umtxop,
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Waitoptions,
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Whence,
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/* Pointers to non-structures. */
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Ptr,
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BinString,
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CapRights,
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ExecArgs,
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ExecEnv,
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ExitStatus,
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Fd_set,
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IntArray,
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Iovec,
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Name,
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PipeFds,
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PSig,
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PQuadHex,
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PUInt,
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Readlinkres,
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ShmName,
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StringArray,
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/* Pointers to structures. */
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Itimerval,
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Kevent,
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Kevent11,
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LinuxSockArgs,
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Msghdr,
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Pollfd,
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Rlimit,
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Rusage,
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Schedparam,
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Sctpsndrcvinfo,
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Sigaction,
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Siginfo,
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Sigset,
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Sockaddr,
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Stat,
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Stat11,
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StatFs,
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Timespec,
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Timespec2,
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Timeval,
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Timeval2,
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Utrace,
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CloudABIAdvice,
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CloudABIClockID,
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CloudABIFDSFlags,
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CloudABIFDStat,
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CloudABIFileStat,
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CloudABIFileType,
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CloudABIFSFlags,
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CloudABILookup,
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CloudABIMFlags,
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CloudABIMProt,
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CloudABIMSFlags,
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CloudABIOFlags,
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CloudABISDFlags,
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CloudABISignal,
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CloudABISockStat,
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CloudABISSFlags,
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CloudABITimestamp,
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CloudABIULFlags,
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CloudABIWhence,
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MAX_ARG_TYPE,
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};
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#define ARG_MASK 0xff
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#define OUT 0x100
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#define IN /*0x20*/0
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_Static_assert(ARG_MASK > MAX_ARG_TYPE,
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"ARG_MASK overlaps with Argtype values");
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struct syscall_args {
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enum Argtype type;
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int offset;
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};
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struct syscall {
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STAILQ_ENTRY(syscall) entries;
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const char *name;
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u_int ret_type; /* 0, 1, or 2 return values */
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u_int nargs; /* actual number of meaningful arguments */
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/* Hopefully, no syscalls with > 10 args */
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struct syscall_args args[10];
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struct timespec time; /* Time spent for this call */
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int ncalls; /* Number of calls */
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int nerror; /* Number of calls that returned with error */
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bool unknown; /* Unknown system call */
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};
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struct syscall *get_syscall(struct threadinfo *, u_int, u_int);
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char *print_arg(struct syscall_args *, unsigned long*, register_t *,
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struct trussinfo *);
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/*
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* Linux Socket defines
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*/
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#define LINUX_SOCKET 1
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#define LINUX_BIND 2
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#define LINUX_CONNECT 3
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#define LINUX_LISTEN 4
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#define LINUX_ACCEPT 5
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#define LINUX_GETSOCKNAME 6
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#define LINUX_GETPEERNAME 7
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#define LINUX_SOCKETPAIR 8
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#define LINUX_SEND 9
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#define LINUX_RECV 10
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#define LINUX_SENDTO 11
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#define LINUX_RECVFROM 12
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#define LINUX_SHUTDOWN 13
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#define LINUX_SETSOCKOPT 14
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#define LINUX_GETSOCKOPT 15
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#define LINUX_SENDMSG 16
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#define LINUX_RECVMSG 17
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#define PAD_(t) (sizeof(register_t) <= sizeof(t) ? \
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0 : sizeof(register_t) - sizeof(t))
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define PADL_(t) 0
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#define PADR_(t) PAD_(t)
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#else
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#define PADL_(t) PAD_(t)
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#define PADR_(t) 0
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#endif
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typedef int l_int;
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typedef uint32_t l_ulong;
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struct linux_socketcall_args {
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char what_l_[PADL_(l_int)]; l_int what; char what_r_[PADR_(l_int)];
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char args_l_[PADL_(l_ulong)]; l_ulong args; char args_r_[PADR_(l_ulong)];
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};
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void init_syscalls(void);
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void print_syscall(struct trussinfo *);
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void print_syscall_ret(struct trussinfo *, int, register_t *);
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void print_summary(struct trussinfo *trussinfo);
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