a5f14abfd2
A new sysdecode_syscallname() function accepts a system call code and returns a string of the corresponding name (or NULL if the code is unknown). To support different process ABIs, the new function accepts a value from a new sysdecode_abi enum as its first argument to select the ABI in use. Current ABIs supported include FREEBSD (native binaries), FREEBSD32, LINUX, LINUX32, and CLOUDABI64. Note that not all ABIs are supported by all platforms. In general, a given ABI is only supported if a platform can execute binaries for that ABI. To simplify the implementation, libsysdecode's build reuses the existing pre-generated files from the kernel source tree rather than duplicating new copies of said files during the build. kdump(1) and truss(1) now use these functions to map system call identifiers to names. For kdump(1), a new 'syscallname()' function consolidates duplicated code from ktrsyscall() and ktrsyscallret(). The Linux ABI no longer requires custom handling for ktrsyscall() and linux_ktrsyscall() has been removed as a result. Reviewed by: bdrewery Differential Revision: https://reviews.freebsd.org/D4823
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/*
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* Copyright 2001 Jamey Wood
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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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*
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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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#include <sys/linker_set.h>
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#include <sys/queue.h>
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#define FOLLOWFORKS 0x00000001
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#define RELATIVETIMESTAMPS 0x00000002
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#define ABSOLUTETIMESTAMPS 0x00000004
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#define NOSIGS 0x00000008
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#define EXECVEARGS 0x00000010
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#define EXECVEENVS 0x00000020
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#define COUNTONLY 0x00000040
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struct procinfo;
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struct trussinfo;
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struct procabi {
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const char *type;
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enum sysdecode_abi abi;
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int (*fetch_args)(struct trussinfo *, u_int);
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int (*fetch_retval)(struct trussinfo *, long *, int *);
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};
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#define PROCABI(abi) DATA_SET(procabi, abi)
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/*
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* This is confusingly named. It holds per-thread state about the
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* currently executing system call. syscall.h defines a struct
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* syscall that holds metadata used to format system call arguments.
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*
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* NB: args[] stores the raw argument values (e.g. from registers)
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* passed to the system call. s_args[] stores a string representation
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* of a system call's arguments. These do not necessarily map one to
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* one. A system call description may omit individual arguments
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* (padding) or combine adjacent arguments (e.g. when passing an off_t
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* argument on a 32-bit system). The nargs member contains the count
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* of valid pointers in s_args[], not args[].
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*/
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struct current_syscall {
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struct syscall *sc;
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const char *name;
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int number;
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unsigned long args[10];
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unsigned int nargs;
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char *s_args[10]; /* the printable arguments */
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};
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struct threadinfo
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{
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SLIST_ENTRY(threadinfo) entries;
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struct procinfo *proc;
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lwpid_t tid;
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int in_syscall;
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struct current_syscall cs;
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struct timespec before;
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struct timespec after;
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};
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struct procinfo {
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LIST_ENTRY(procinfo) entries;
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pid_t pid;
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struct procabi *abi;
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SLIST_HEAD(, threadinfo) threadlist;
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};
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struct trussinfo
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{
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int flags;
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int strsize;
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FILE *outfile;
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struct timespec start_time;
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struct threadinfo *curthread;
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LIST_HEAD(, procinfo) proclist;
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};
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#define timespecsubt(tvp, uvp, vvp) \
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do { \
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(vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
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(vvp)->tv_nsec = (tvp)->tv_nsec - (uvp)->tv_nsec; \
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if ((vvp)->tv_nsec < 0) { \
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(vvp)->tv_sec--; \
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(vvp)->tv_nsec += 1000000000; \
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} \
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} while (0)
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#define timespecadd(tvp, uvp, vvp) \
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do { \
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(vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
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(vvp)->tv_nsec = (tvp)->tv_nsec + (uvp)->tv_nsec; \
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if ((vvp)->tv_nsec > 1000000000) { \
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(vvp)->tv_sec++; \
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(vvp)->tv_nsec -= 1000000000; \
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} \
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} while (0)
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