server/context_sparc.c

   1 /*
   2  * Sparc register context support
   3  *
   4  * Copyright (C) 2000 Ulrich Weigand
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #ifdef __sparc__
  24
  25 #include <assert.h>
  26 #include <errno.h>
  27 #include <sys/types.h>
  28 #ifdef HAVE_SYS_REG_H
  29 # include <sys/reg.h>
  30 #endif
  31 #include <unistd.h>
  32 #ifdef HAVE_SYS_PTRACE_H
  33 # include <sys/ptrace.h>
  34 #endif
  35
  36 #include "winbase.h"
  37
  38 #include "thread.h"
  39 #include "request.h"
  40
  41
  42 #if defined(__sun) || defined(__sun__)
  43
  44 /* retrieve a thread context */
  45 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  46 {
  47     int pid = thread->unix_pid;
  48     if (flags & CONTEXT_FULL)
  49     {
  50         struct regs regs;
  51         if (ptrace( PTRACE_GETREGS, pid, 0, (int) &regs ) == -1) goto error;
  52         if (flags & CONTEXT_INTEGER)
  53         {
  54             context->g0 = 0;
  55             context->g1 = regs.r_g1;
  56             context->g2 = regs.r_g2;
  57             context->g3 = regs.r_g3;
  58             context->g4 = regs.r_g4;
  59             context->g5 = regs.r_g5;
  60             context->g6 = regs.r_g6;
  61             context->g7 = regs.r_g7;
  62
  63             context->o0 = regs.r_o0;
  64             context->o1 = regs.r_o1;
  65             context->o2 = regs.r_o2;
  66             context->o3 = regs.r_o3;
  67             context->o4 = regs.r_o4;
  68             context->o5 = regs.r_o5;
  69             context->o6 = regs.r_o6;
  70             context->o7 = regs.r_o7;
  71
  72             /* FIXME: local and in registers */
  73         }
  74         if (flags & CONTEXT_CONTROL)
  75         {
  76             context->psr = regs.r_psr;
  77             context->pc  = regs.r_pc;
  78             context->npc = regs.r_npc;
  79             context->y   = regs.r_y;
  80             context->wim = 0;  /* FIXME */
  81             context->tbr = 0;  /* FIXME */
  82         }
  83     }
  84     if (flags & CONTEXT_FLOATING_POINT)
  85     {
  86         /* FIXME */
  87     }
  88     return;
  89  error:
  90     file_set_error();
  91 }
  92
  93
  94 /* set a thread context */
  95 static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
  96 {
  97     /* FIXME */
  98 }
  99
 100 #else  /* __sun__ */
 101 #error You must implement get/set_thread_context for your platform
 102 #endif  /* __sun__ */
 103
 104
 105 /* copy a context structure according to the flags */
 106 static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
 107 {
 108     if (flags & CONTEXT_CONTROL)
 109     {
 110         to->psr    = from->psr;
 111         to->pc     = from->pc;
 112         to->npc    = from->npc;
 113         to->y      = from->y;
 114         to->wim    = from->wim;
 115         to->tbr    = from->tbr;
 116     }
 117     if (flags & CONTEXT_INTEGER)
 118     {
 119         to->g0 = from->g0;
 120         to->g1 = from->g1;
 121         to->g2 = from->g2;
 122         to->g3 = from->g3;
 123         to->g4 = from->g4;
 124         to->g5 = from->g5;
 125         to->g6 = from->g6;
 126         to->g7 = from->g7;
 127         to->o0 = from->o0;
 128         to->o1 = from->o1;
 129         to->o2 = from->o2;
 130         to->o3 = from->o3;
 131         to->o4 = from->o4;
 132         to->o5 = from->o5;
 133         to->o6 = from->o6;
 134         to->o7 = from->o7;
 135         to->l0 = from->l0;
 136         to->l1 = from->l1;
 137         to->l2 = from->l2;
 138         to->l3 = from->l3;
 139         to->l4 = from->l4;
 140         to->l5 = from->l5;
 141         to->l6 = from->l6;
 142         to->l7 = from->l7;
 143         to->i0 = from->i0;
 144         to->i1 = from->i1;
 145         to->i2 = from->i2;
 146         to->i3 = from->i3;
 147         to->i4 = from->i4;
 148         to->i5 = from->i5;
 149         to->i6 = from->i6;
 150         to->i7 = from->i7;
 151     }
 152     if (flags & CONTEXT_FLOATING_POINT)
 153     {
 154         /* FIXME */
 155     }
 156 }
 157
 158 /* retrieve the current instruction pointer of a thread */
 159 void *get_thread_ip( struct thread *thread )
 160 {
 161     CONTEXT context;
 162     context.pc = 0;
 163     if (suspend_for_ptrace( thread ))
 164     {
 165         get_thread_context( thread, CONTEXT_CONTROL, &context );
 166         resume_thread( thread );
 167     }
 168     return (void *)context.pc;
 169 }
 170
 171 /* determine if we should continue the thread in single-step mode */
 172 int get_thread_single_step( struct thread *thread )
 173 {
 174     return 0;  /* FIXME */
 175 }
 176
 177 /* retrieve the current context of a thread */
 178 DECL_HANDLER(get_thread_context)
 179 {
 180     struct thread *thread;
 181     void *data;
 182     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 183
 184     if (get_reply_max_size() < sizeof(CONTEXT))
 185     {
 186         set_error( STATUS_INVALID_PARAMETER );
 187         return;
 188     }
 189     if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
 190
 191     if ((data = set_reply_data_size( sizeof(CONTEXT) )))
 192     {
 193         if (thread->context)  /* thread is inside an exception event */
 194         {
 195             copy_context( data, thread->context, flags );
 196             flags = 0;
 197         }
 198         if (flags && suspend_for_ptrace( thread ))
 199         {
 200             get_thread_context( thread, flags, data );
 201             resume_thread( thread );
 202         }
 203     }
 204     release_object( thread );
 205 }
 206
 207
 208 /* set the current context of a thread */
 209 DECL_HANDLER(set_thread_context)
 210 {
 211     struct thread *thread;
 212     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 213
 214     if (get_req_data_size() < sizeof(CONTEXT))
 215     {
 216         set_error( STATUS_INVALID_PARAMETER );
 217         return;
 218     }
 219     if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
 220     {
 221         if (thread->context)  /* thread is inside an exception event */
 222         {
 223             copy_context( thread->context, get_req_data(), flags );
 224             flags = 0;
 225         }
 226         if (flags && suspend_for_ptrace( thread ))
 227         {
 228             set_thread_context( thread, flags, get_req_data() );
 229             resume_thread( thread );
 230         }
 231         release_object( thread );
 232     }
 233 }
 234
 235 #endif  /* __sparc__ */