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/i386/i386/ptrace_machdep.c

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 2005 Doug Rabson
    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/11.2/sys/i386/i386/ptrace_machdep.c 331722 2018-03-29 02:50:57Z eadler $");
   30 
   31 #include "opt_cpu.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 <machine/frame.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                 npxgetregs(td);
   55                 savefpu = (char *)(get_pcb_user_save_td(td) + 1);
   56                 error = copyout(savefpu, addr,
   57                     cpu_max_ext_state_size - sizeof(union savefpu));
   58                 break;
   59 
   60         case PT_SETXSTATE_OLD:
   61                 if (data > cpu_max_ext_state_size - sizeof(union 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                         npxgetregs(td);
   69                         error = npxsetxstate(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                 npxgetregs(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(union 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 = npxsetregs(td, (union savefpu *)savefpu,
  100                             savefpu + sizeof(union savefpu), data -
  101                             sizeof(union savefpu));
  102                 free(savefpu, M_TEMP);
  103                 break;
  104 
  105         default:
  106                 error = EINVAL;
  107                 break;
  108         }
  109 
  110         return (error);
  111 }
  112 
  113 static int
  114 cpu_ptrace_xmm(struct thread *td, int req, void *addr, int data)
  115 {
  116         struct savexmm *fpstate;
  117         int error;
  118 
  119         if (!cpu_fxsr)
  120                 return (EINVAL);
  121 
  122         fpstate = &get_pcb_user_save_td(td)->sv_xmm;
  123         switch (req) {
  124         case PT_GETXMMREGS:
  125                 npxgetregs(td);
  126                 error = copyout(fpstate, addr, sizeof(*fpstate));
  127                 break;
  128 
  129         case PT_SETXMMREGS:
  130                 npxgetregs(td);
  131                 error = copyin(addr, fpstate, sizeof(*fpstate));
  132                 fpstate->sv_env.en_mxcsr &= cpu_mxcsr_mask;
  133                 break;
  134 
  135         case PT_GETXSTATE_OLD:
  136         case PT_SETXSTATE_OLD:
  137         case PT_GETXSTATE_INFO:
  138         case PT_GETXSTATE:
  139         case PT_SETXSTATE:
  140                 error = cpu_ptrace_xstate(td, req, addr, data);
  141                 break;
  142 
  143         default:
  144                 return (EINVAL);
  145         }
  146 
  147         return (error);
  148 }
  149 
  150 int
  151 cpu_ptrace(struct thread *td, int req, void *addr, int data)
  152 {
  153         struct segment_descriptor *sdp, sd;
  154         register_t r;
  155         int error;
  156 
  157         switch (req) {
  158         case PT_GETXMMREGS:
  159         case PT_SETXMMREGS:
  160         case PT_GETXSTATE_OLD:
  161         case PT_SETXSTATE_OLD:
  162         case PT_GETXSTATE_INFO:
  163         case PT_GETXSTATE:
  164         case PT_SETXSTATE:
  165                 error = cpu_ptrace_xmm(td, req, addr, data);
  166                 break;
  167 
  168         case PT_GETFSBASE:
  169         case PT_GETGSBASE:
  170                 sdp = req == PT_GETFSBASE ? &td->td_pcb->pcb_fsd :
  171                     &td->td_pcb->pcb_gsd;
  172                 r = sdp->sd_hibase << 24 | sdp->sd_lobase;
  173                 error = copyout(&r, addr, sizeof(r));
  174                 break;
  175 
  176         case PT_SETFSBASE:
  177         case PT_SETGSBASE:
  178                 error = copyin(addr, &r, sizeof(r));
  179                 if (error != 0)
  180                         break;
  181                 fill_based_sd(&sd, r);
  182                 if (req == PT_SETFSBASE) {
  183                         td->td_pcb->pcb_fsd = sd;
  184                         td->td_frame->tf_fs = GSEL(GUFS_SEL, SEL_UPL);
  185                 } else {
  186                         td->td_pcb->pcb_gsd = sd;
  187                         td->td_pcb->pcb_gs = GSEL(GUGS_SEL, SEL_UPL);
  188                 }
  189                 break;
  190 
  191         default:
  192                 return (EINVAL);
  193         }
  194 
  195         return (error);
  196 }

Cache object: 9b459c83f94befc2b583af0eacaeab31


[ 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.