190 lines
5.3 KiB
C
190 lines
5.3 KiB
C
/* $NetBSD: linux_ptrace.c,v 1.3 1999/12/16 15:11:19 tron Exp $ */
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/*-
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* Copyright (c) 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matthias Scheler.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/ptrace.h>
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#include <sys/systm.h>
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#include <sys/syscallargs.h>
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#include <machine/reg.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_ptrace.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/common/linux_machdep.h>
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#include <compat/linux/linux_syscallargs.h>
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#define LINUX_PTRACE_GETREGS 12
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#define LINUX_PTRACE_SETREGS 13
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#define LINUX_PTRACE_GETFPREGS 14
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#define LINUX_PTRACE_SETFPREGS 15
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struct linux_reg {
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long ebx;
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long ecx;
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long edx;
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long esi;
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long edi;
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long ebp;
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long eax;
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int xds;
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int xes;
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long orig_eax;
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long eip;
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int xcs;
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long eflags;
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long esp;
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int xss;
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};
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#define ISSET(t, f) ((t) & (f))
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int
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linux_sys_ptrace_arch(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_ptrace_args /* {
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syscallarg(int) request;
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syscallarg(int) pid;
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syscallarg(int) addr;
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syscallarg(int) data;
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} */ *uap = v;
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int request, error;
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struct proc *t; /* target process */
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struct reg regs;
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struct linux_reg linux_regs;
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request = SCARG(uap, request);
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if ((request != LINUX_PTRACE_GETREGS) &&
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(request != LINUX_PTRACE_SETREGS) &&
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(request != LINUX_PTRACE_GETFPREGS) &&
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(request != LINUX_PTRACE_SETFPREGS))
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return EIO;
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/* Find the process we're supposed to be operating on. */
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if ((t = pfind(SCARG(uap, pid))) == NULL)
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return ESRCH;
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/*
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* You can't do what you want to the process if:
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* (1) It's not being traced at all,
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*/
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if (!ISSET(t->p_flag, P_TRACED))
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return EPERM;
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/*
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* (2) it's being traced by procfs (which has
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* different signal delivery semantics),
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*/
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if (ISSET(t->p_flag, P_FSTRACE))
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return EBUSY;
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/*
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* (3) it's not being traced by _you_, or
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*/
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if (t->p_pptr != p)
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return EBUSY;
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/*
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* (4) it's not currently stopped.
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*/
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if (t->p_stat != SSTOP || !ISSET(t->p_flag, P_WAITED))
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return EBUSY;
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*retval = 0;
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switch (request) {
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case LINUX_PTRACE_GETREGS:
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error = process_read_regs(t, ®s);
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if (error != 0)
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return error;
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linux_regs.ebx = regs.r_ebx;
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linux_regs.ecx = regs.r_ecx;
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linux_regs.edx = regs.r_edx;
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linux_regs.esi = regs.r_esi;
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linux_regs.edi = regs.r_edi;
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linux_regs.ebp = regs.r_ebp;
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linux_regs.eax = regs.r_eax;
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linux_regs.xds = regs.r_ds;
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linux_regs.xes = regs.r_es;
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linux_regs.orig_eax = regs.r_eax; /* XXX is this correct? */
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linux_regs.eip = regs.r_eip;
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linux_regs.xcs = regs.r_cs;
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linux_regs.eflags = regs.r_eflags;
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linux_regs.esp = regs.r_esp;
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linux_regs.xss = regs.r_ss;
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return copyout(&linux_regs, (caddr_t)SCARG(uap, data),
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sizeof(struct linux_reg));
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case LINUX_PTRACE_SETREGS:
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error = copyin((caddr_t)SCARG(uap, data), &linux_regs,
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sizeof(struct linux_reg));
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if (error != 0)
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return error;
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regs.r_ebx = linux_regs.ebx;
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regs.r_ecx = linux_regs.ecx;
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regs.r_edx = linux_regs.edx;
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regs.r_esi = linux_regs.esi;
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regs.r_edi = linux_regs.edi;
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regs.r_ebp = linux_regs.ebp;
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regs.r_eax = linux_regs.eax;
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regs.r_ds = linux_regs.xds;
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regs.r_es = linux_regs.xes;
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regs.r_eip = linux_regs.eip;
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regs.r_cs = linux_regs.xcs;
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regs.r_eflags = linux_regs.eflags;
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regs.r_esp = linux_regs.esp;
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regs.r_ss = linux_regs.xss;
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return process_write_regs(t, ®s);
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}
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return EIO;
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}
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