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 "file.h"
  39 #include "thread.h"
  40 #include "request.h"
  41
  42
  43 #if defined(__sun) || defined(__sun__)
  44
  45 /* retrieve a thread context */
  46 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  47 {
  48     int pid = get_ptrace_pid(thread);
  49     if (flags & CONTEXT_FULL)
  50     {
  51         struct regs regs;
  52         if (ptrace( PTRACE_GETREGS, pid, 0, (int) &regs ) == -1) goto error;
  53         if (flags & CONTEXT_INTEGER)
  54         {
  55             context->g0 = 0;
  56             context->g1 = regs.r_g1;
  57             context->g2 = regs.r_g2;
  58             context->g3 = regs.r_g3;
  59             context->g4 = regs.r_g4;
  60             context->g5 = regs.r_g5;
  61             context->g6 = regs.r_g6;
  62             context->g7 = regs.r_g7;
  63
  64             context->o0 = regs.r_o0;
  65             context->o1 = regs.r_o1;
  66             context->o2 = regs.r_o2;
  67             context->o3 = regs.r_o3;
  68             context->o4 = regs.r_o4;
  69             context->o5 = regs.r_o5;
  70             context->o6 = regs.r_o6;
  71             context->o7 = regs.r_o7;
  72
  73             /* FIXME: local and in registers */
  74         }
  75         if (flags & CONTEXT_CONTROL)
  76         {
  77             context->psr = regs.r_psr;
  78             context->pc  = regs.r_pc;
  79             context->npc = regs.r_npc;
  80             context->y   = regs.r_y;
  81             context->wim = 0;  /* FIXME */
  82             context->tbr = 0;  /* FIXME */
  83         }
  84     }
  85     if (flags & CONTEXT_FLOATING_POINT)
  86     {
  87         /* FIXME */
  88     }
  89     return;
  90  error:
  91     file_set_error();
  92 }
  93
  94
  95 /* set a thread context */
  96 static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
  97 {
  98     /* FIXME */
  99 }
 100
 101 #else  /* __sun__ */
 102 #error You must implement get/set_thread_context for your platform
 103 #endif  /* __sun__ */
 104
 105
 106 /* copy a context structure according to the flags */
 107 static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
 108 {
 109     if (flags & CONTEXT_CONTROL)
 110     {
 111         to->psr    = from->psr;
 112         to->pc     = from->pc;
 113         to->npc    = from->npc;
 114         to->y      = from->y;
 115         to->wim    = from->wim;
 116         to->tbr    = from->tbr;
 117     }
 118     if (flags & CONTEXT_INTEGER)
 119     {
 120         to->g0 = from->g0;
 121         to->g1 = from->g1;
 122         to->g2 = from->g2;
 123         to->g3 = from->g3;
 124         to->g4 = from->g4;
 125         to->g5 = from->g5;
 126         to->g6 = from->g6;
 127         to->g7 = from->g7;
 128         to->o0 = from->o0;
 129         to->o1 = from->o1;
 130         to->o2 = from->o2;
 131         to->o3 = from->o3;
 132         to->o4 = from->o4;
 133         to->o5 = from->o5;
 134         to->o6 = from->o6;
 135         to->o7 = from->o7;
 136         to->l0 = from->l0;
 137         to->l1 = from->l1;
 138         to->l2 = from->l2;
 139         to->l3 = from->l3;
 140         to->l4 = from->l4;
 141         to->l5 = from->l5;
 142         to->l6 = from->l6;
 143         to->l7 = from->l7;
 144         to->i0 = from->i0;
 145         to->i1 = from->i1;
 146         to->i2 = from->i2;
 147         to->i3 = from->i3;
 148         to->i4 = from->i4;
 149         to->i5 = from->i5;
 150         to->i6 = from->i6;
 151         to->i7 = from->i7;
 152     }
 153     if (flags & CONTEXT_FLOATING_POINT)
 154     {
 155         /* FIXME */
 156     }
 157 }
 158
 159 /* retrieve the current instruction pointer of a thread */
 160 void *get_thread_ip( struct thread *thread )
 161 {
 162     CONTEXT context;
 163     context.pc = 0;
 164     if (suspend_for_ptrace( thread ))
 165     {
 166         get_thread_context( thread, CONTEXT_CONTROL, &context );
 167         resume_after_ptrace( thread );
 168     }
 169     return (void *)context.pc;
 170 }
 171
 172 /* determine if we should continue the thread in single-step mode */
 173 int get_thread_single_step( struct thread *thread )
 174 {
 175     return 0;  /* FIXME */
 176 }
 177
 178 /* send a signal to a specific thread */
 179 int tkill( int pid, int sig )
 180 {
 181     /* FIXME: should do something here */
 182     errno = ENOSYS;
 183     return -1;
 184 }
 185
 186 /* retrieve the current context of a thread */
 187 DECL_HANDLER(get_thread_context)
 188 {
 189     struct thread *thread;
 190     void *data;
 191     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 192
 193     if (get_reply_max_size() < sizeof(CONTEXT))
 194     {
 195         set_error( STATUS_INVALID_PARAMETER );
 196         return;
 197     }
 198     if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
 199
 200     if ((data = set_reply_data_size( sizeof(CONTEXT) )))
 201     {
 202         if (thread->context)  /* thread is inside an exception event */
 203         {
 204             copy_context( data, thread->context, flags );
 205             flags = 0;
 206         }
 207         if (flags && suspend_for_ptrace( thread ))
 208         {
 209             get_thread_context( thread, flags, data );
 210             resume_after_ptrace( thread );
 211         }
 212     }
 213     release_object( thread );
 214 }
 215
 216
 217 /* set the current context of a thread */
 218 DECL_HANDLER(set_thread_context)
 219 {
 220     struct thread *thread;
 221     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 222
 223     if (get_req_data_size() < sizeof(CONTEXT))
 224     {
 225         set_error( STATUS_INVALID_PARAMETER );
 226         return;
 227     }
 228     if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
 229     {
 230         if (thread->context)  /* thread is inside an exception event */
 231         {
 232             copy_context( thread->context, get_req_data(), flags );
 233             flags = 0;
 234         }
 235         if (flags && suspend_for_ptrace( thread ))
 236         {
 237             set_thread_context( thread, flags, get_req_data() );
 238             resume_after_ptrace( thread );
 239         }
 240         release_object( thread );
 241     }
 242 }
 243
 244 #endif  /* __sparc__ */