1 /* 2 * This file is part of ltrace. 3 * Copyright (C) 2013 Petr Machata, Red Hat Inc. 4 * Copyright (C) 1998,2002,2004,2008,2009 Juan Cespedes 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License as 8 * published by the Free Software Foundation; either version 2 of the 9 * License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, but 12 * WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 19 * 02110-1301 USA 20 */ 21 22 #include "config.h" 23 24 #include <sys/types.h> 25 #include <sys/ptrace.h> 26 #include <asm/ptrace.h> 27 28 #include "proc.h" 29 #include "common.h" 30 31 #if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR)) 32 # define PTRACE_PEEKUSER PTRACE_PEEKUSR 33 #endif 34 35 #if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR)) 36 # define PTRACE_POKEUSER PTRACE_POKEUSR 37 #endif 38 39 void * 40 get_instruction_pointer(struct process *proc) 41 { 42 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_PC, 0); 43 } 44 45 void 46 set_instruction_pointer(struct process *proc, void *addr) 47 { 48 ptrace(PTRACE_POKEUSER, proc->pid, 4 * PT_PC, addr); 49 } 50 51 void * 52 get_stack_pointer(struct process *proc) 53 { 54 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_USP, 0); 55 } 56 57 void * 58 get_return_addr(struct process *proc, void *stack_pointer) 59 { 60 return (void *)ptrace(PTRACE_PEEKTEXT, proc->pid, stack_pointer, 0); 61 } 62
