97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/*
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* This file is part of ltrace.
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* Copyright (C) 2013 Petr Machata, Red Hat Inc.
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* Copyright (C) 2008,2009 Juan Cespedes
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* Copyright (C) 2006 Eric Vaitl, Cisco Systems, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include "config.h"
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#include <stddef.h>
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <asm/ptrace.h>
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#include "proc.h"
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#include "common.h"
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#include "mips.h"
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#if (!defined(PTRACE_PEEKUSER) && defined(PTRACE_PEEKUSR))
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# define PTRACE_PEEKUSER PTRACE_PEEKUSR
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#endif
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#if (!defined(PTRACE_POKEUSER) && defined(PTRACE_POKEUSR))
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# define PTRACE_POKEUSER PTRACE_POKEUSR
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#endif
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/**
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\addtogroup mips
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@{
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*/
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/**
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\param proc The process to work on.
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\return The current instruction pointer.
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*/
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void *
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get_instruction_pointer(struct process *proc)
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{
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return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_pc, 0);
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}
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/**
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\param proc The process to work on.
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\param addr The address to set to.
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Called by \c continue_after_breakpoint().
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\todo Our mips kernel ptrace doesn't support PTRACE_SINGLESTEP, so
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we \c continue_process() after a breakpoint. Check if this is OK.
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*/
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void
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set_instruction_pointer(struct process *proc, void *addr)
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{
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ptrace(PTRACE_POKEUSER, proc->pid, off_pc, addr);
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}
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/**
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\param proc The process to work on.
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\return The current stack pointer.
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*/
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void *
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get_stack_pointer(struct process *proc)
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{
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return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_sp, 0);
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}
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/**
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\param proc The process to work on.
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\param stack_pointer The current stack pointer for proc
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\return The current return address.
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Called by \c handle_breakpoint().
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Mips uses r31 for the return address, so the stack_pointer is
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unused.
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*/
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void *
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get_return_addr(struct process *proc, void *stack_pointer)
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{
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return (void *)ptrace(PTRACE_PEEKUSER, proc->pid, off_lr, 0);
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}
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