The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/amd64/amd64/ptrace_machdep.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2011 Konstantin Belousov <kib@FreeBSD.org>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/10.2/sys/amd64/amd64/ptrace_machdep.c 279211 2015-02-23 18:38:41Z jhb $");
   30 
   31 #include "opt_compat.h"
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/malloc.h>
   36 #include <sys/proc.h>
   37 #include <sys/ptrace.h>
   38 #include <sys/sysent.h>
   39 #include <machine/md_var.h>
   40 #include <machine/pcb.h>
   41 
   42 static int
   43 cpu_ptrace_xstate(struct thread *td, int req, void *addr, int data)
   44 {
   45         struct ptrace_xstate_info info;
   46         char *savefpu;
   47         int error;
   48 
   49         if (!use_xsave)
   50                 return (EOPNOTSUPP);
   51 
   52         switch (req) {
   53         case PT_GETXSTATE_OLD:
   54                 fpugetregs(td);
   55                 savefpu = (char *)(get_pcb_user_save_td(td) + 1);
   56                 error = copyout(savefpu, addr,
   57                     cpu_max_ext_state_size - sizeof(struct savefpu));
   58                 break;
   59 
   60         case PT_SETXSTATE_OLD:
   61                 if (data > cpu_max_ext_state_size - sizeof(struct savefpu)) {
   62                         error = EINVAL;
   63                         break;
   64                 }
   65                 savefpu = malloc(data, M_TEMP, M_WAITOK);
   66                 error = copyin(addr, savefpu, data);
   67                 if (error == 0) {
   68                         fpugetregs(td);
   69                         error = fpusetxstate(td, savefpu, data);
   70                 }
   71                 free(savefpu, M_TEMP);
   72                 break;
   73 
   74         case PT_GETXSTATE_INFO:
   75                 if (data != sizeof(info)) {
   76                         error  = EINVAL;
   77                         break;
   78                 }
   79                 info.xsave_len = cpu_max_ext_state_size;
   80                 info.xsave_mask = xsave_mask;
   81                 error = copyout(&info, addr, data);
   82                 break;
   83 
   84         case PT_GETXSTATE:
   85                 fpugetregs(td);
   86                 savefpu = (char *)(get_pcb_user_save_td(td));
   87                 error = copyout(savefpu, addr, cpu_max_ext_state_size);
   88                 break;
   89 
   90         case PT_SETXSTATE:
   91                 if (data < sizeof(struct savefpu) ||
   92                     data > cpu_max_ext_state_size) {
   93                         error = EINVAL;
   94                         break;
   95                 }
   96                 savefpu = malloc(data, M_TEMP, M_WAITOK);
   97                 error = copyin(addr, savefpu, data);
   98                 if (error == 0)
   99                         error = fpusetregs(td, (struct savefpu *)savefpu,
  100                             savefpu + sizeof(struct savefpu), data -
  101                             sizeof(struct savefpu));
  102                 free(savefpu, M_TEMP);
  103                 break;
  104 
  105         default:
  106                 error = EINVAL;
  107                 break;
  108         }
  109 
  110         return (error);
  111 }
  112 
  113 #ifdef COMPAT_FREEBSD32
  114 #define PT_I386_GETXMMREGS      (PT_FIRSTMACH + 0)
  115 #define PT_I386_SETXMMREGS      (PT_FIRSTMACH + 1)
  116 
  117 static int
  118 cpu32_ptrace(struct thread *td, int req, void *addr, int data)
  119 {
  120         struct savefpu *fpstate;
  121         int error;
  122 
  123         switch (req) {
  124         case PT_I386_GETXMMREGS:
  125                 fpugetregs(td);
  126                 error = copyout(get_pcb_user_save_td(td), addr,
  127                     sizeof(*fpstate));
  128                 break;
  129 
  130         case PT_I386_SETXMMREGS:
  131                 fpugetregs(td);
  132                 fpstate = get_pcb_user_save_td(td);
  133                 error = copyin(addr, fpstate, sizeof(*fpstate));
  134                 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
  135                 break;
  136 
  137         case PT_GETXSTATE_OLD:
  138         case PT_SETXSTATE_OLD:
  139         case PT_GETXSTATE_INFO:
  140         case PT_GETXSTATE:
  141         case PT_SETXSTATE:
  142                 error = cpu_ptrace_xstate(td, req, addr, data);
  143                 break;
  144 
  145         default:
  146                 error = EINVAL;
  147                 break;
  148         }
  149 
  150         return (error);
  151 }
  152 #endif
  153 
  154 int
  155 cpu_ptrace(struct thread *td, int req, void *addr, int data)
  156 {
  157         int error;
  158 
  159 #ifdef COMPAT_FREEBSD32
  160         if (SV_CURPROC_FLAG(SV_ILP32))
  161                 return (cpu32_ptrace(td, req, addr, data));
  162 #endif
  163 
  164         /* Support old values of PT_GETXSTATE_OLD and PT_SETXSTATE_OLD. */
  165         if (req == PT_FIRSTMACH + 0)
  166                 req = PT_GETXSTATE_OLD;
  167         if (req == PT_FIRSTMACH + 1)
  168                 req = PT_SETXSTATE_OLD;
  169 
  170         switch (req) {
  171         case PT_GETXSTATE_OLD:
  172         case PT_SETXSTATE_OLD:
  173         case PT_GETXSTATE_INFO:
  174         case PT_GETXSTATE:
  175         case PT_SETXSTATE:
  176                 error = cpu_ptrace_xstate(td, req, addr, data);
  177                 break;
  178 
  179         default:
  180                 error = EINVAL;
  181                 break;
  182         }
  183 
  184         return (error);
  185 }

Cache object: 35ac9c3902f0b476542ee609d73838b0


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.