| /* |
| * This file is part of ltrace. |
| * Copyright (C) 2013 Petr Machata, Red Hat Inc. |
| * Copyright (C) 2008,2009 Juan Cespedes |
| * Copyright (C) 2006 Eric Vaitl, Cisco Systems, Inc. |
| * |
| * 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 <stddef.h> |
| #include <sys/types.h> |
| #include <sys/ptrace.h> |
| #include <asm/ptrace.h> |
| |
| #include "proc.h" |
| #include "common.h" |
| #include "mips.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 |
| |
| /** |
| \addtogroup mips |
| @{ |
| */ |
| |
| |
| /** |
| \param proc The process to work on. |
| \return The current instruction pointer. |
| */ |
| void * |
| get_instruction_pointer(struct process *proc) |
| { |
| return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_pc, 0); |
| } |
| |
| /** |
| \param proc The process to work on. |
| \param addr The address to set to. |
| |
| Called by \c continue_after_breakpoint(). |
| |
| \todo Our mips kernel ptrace doesn't support PTRACE_SINGLESTEP, so |
| we \c continue_process() after a breakpoint. Check if this is OK. |
| */ |
| void |
| set_instruction_pointer(struct process *proc, void *addr) |
| { |
| ptrace(PTRACE_POKEUSER, proc->pid, off_pc, addr); |
| } |
| |
| /** |
| \param proc The process to work on. |
| \return The current stack pointer. |
| */ |
| void * |
| get_stack_pointer(struct process *proc) |
| { |
| return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_sp, 0); |
| } |
| |
| /** |
| \param proc The process to work on. |
| \param stack_pointer The current stack pointer for proc |
| \return The current return address. |
| |
| Called by \c handle_breakpoint(). |
| |
| Mips uses r31 for the return address, so the stack_pointer is |
| unused. |
| */ |
| void * |
| get_return_addr(struct process *proc, void *stack_pointer) |
| { |
| return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_lr, 0); |
| } |