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