1 /*
2 * This file is part of ltrace.
3 * Copyright (C) 2010 Edgar E. Iglesias
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of the
8 * License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18 * 02110-1301 USA
19 */
20
21 #if HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include <sys/types.h>
26 #include <sys/ptrace.h>
27 #include <asm/ptrace.h>
28
29 #include "proc.h"
30 #include "common.h"
31
32 #if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
33 # define PTRACE_PEEKUSER PTRACE_PEEKUSR
34 #endif
35
36 #if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
37 # define PTRACE_POKEUSER PTRACE_POKEUSR
38 #endif
39
get_instruction_pointer(struct process * proc)40 void *get_instruction_pointer(struct process *proc)
41 {
42 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_PPC, 0);
43 }
44
set_instruction_pointer(struct process * proc,void * addr)45 void set_instruction_pointer(struct process *proc, void *addr)
46 {
47 ptrace(PTRACE_POKEUSER, proc->pid, 4 * PT_PPC, addr);
48 }
49
get_stack_pointer(struct process * proc)50 void *get_stack_pointer(struct process *proc)
51 {
52 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_USP, 0);
53 }
54
get_return_addr(struct process * proc,void * stack_pointer)55 void *get_return_addr(struct process *proc, void *stack_pointer)
56 {
57 return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, 4 * PT_SRP, 0);
58 }
59