71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/*
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* This file is part of ltrace.
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* Copyright (C) 1998,2001,2004,2008,2009 Juan Cespedes
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* Copyright (C) 2009 Juan Cespedes
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* Copyright (C) 2006 Ian Wienand
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include "config.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <signal.h>
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#include <sys/ptrace.h>
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#include <asm/ptrace.h>
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#include "proc.h"
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#include "common.h"
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#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
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# define PTRACE_PEEKUSER PTRACE_PEEKUSR
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#endif
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#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
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# define PTRACE_POKEUSER PTRACE_POKEUSR
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#endif
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void
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get_arch_dep(struct process *proc)
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{
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}
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/* Returns 1 if syscall, 2 if sysret, 0 otherwise.
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*/
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int
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syscall_p(struct process *proc, int status, int *sysnum)
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{
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int depth;
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if (WIFSTOPPED(status)
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&& WSTOPSIG(status) == (SIGTRAP | proc->tracesysgood)) {
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*sysnum = ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_ORIG_D0, 0);
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if (*sysnum == -1)
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return 0;
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if (*sysnum >= 0) {
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depth = proc->callstack_depth;
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if (depth > 0 &&
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proc->callstack[depth - 1].is_syscall &&
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proc->callstack[depth - 1].c_un.syscall == *sysnum) {
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return 2;
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} else {
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return 1;
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}
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}
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}
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return 0;
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}
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