1 /* 2 * This file is part of ltrace. 3 * Copyright (C) 1998,2001,2004,2008,2009 Juan Cespedes 4 * Copyright (C) 2009 Juan Cespedes 5 * Copyright (C) 2006 Ian Wienand 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License as 9 * published by the Free Software Foundation; either version 2 of the 10 * License, or (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 20 * 02110-1301 USA 21 */ 22 23 #include "config.h" 24 25 #include <sys/types.h> 26 #include <sys/wait.h> 27 #include <signal.h> 28 #include <sys/ptrace.h> 29 #include <asm/ptrace.h> 30 31 #include "proc.h" 32 #include "common.h" 33 34 #if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR)) 35 # define PTRACE_PEEKUSER PTRACE_PEEKUSR 36 #endif 37 38 #if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR)) 39 # define PTRACE_POKEUSER PTRACE_POKEUSR 40 #endif 41 42 void 43 get_arch_dep(struct process *proc) 44 { 45 } 46 47 /* Returns 1 if syscall, 2 if sysret, 0 otherwise. 48 */ 49 int 50 syscall_p(struct process *proc, int status, int *sysnum) 51 { 52 int depth; 53 54 if (WIFSTOPPED(status) 55 && WSTOPSIG(status) == (SIGTRAP | proc->tracesysgood)) { 56 *sysnum = ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_ORIG_D0, 0); 57 if (*sysnum == -1) 58 return 0; 59 if (*sysnum >= 0) { 60 depth = proc->callstack_depth; 61 if (depth > 0 && 62 proc->callstack[depth - 1].is_syscall && 63 proc->callstack[depth - 1].c_un.syscall == *sysnum) { 64 return 2; 65 } else { 66 return 1; 67 } 68 } 69 } 70 return 0; 71 } 72
