fa69965329
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
117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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/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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#define DISPLAYTIDS 0x00000080
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struct procinfo;
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struct syscall;
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struct trussinfo;
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/*
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* The lookup of normal system calls are optimized by using a fixed
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* array for the first 1024 system calls that can be indexed directly.
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* Unknown system calls with other IDs are stored in a linked list.
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*/
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#define SYSCALL_NORMAL_COUNT 1024
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struct extra_syscall {
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STAILQ_ENTRY(extra_syscall) entries;
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struct syscall *sc;
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u_int number;
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};
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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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STAILQ_HEAD(, extra_syscall) extra_syscalls;
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struct syscall *syscalls[SYSCALL_NORMAL_COUNT];
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};
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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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unsigned int number;
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unsigned int nargs;
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unsigned long args[10];
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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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LIST_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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LIST_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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