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 <stdarg.h>
  32 #include <unistd.h>
  33 #ifdef HAVE_SYS_PTRACE_H
  34 # include <sys/ptrace.h>
  35 #endif
  36
  37 #include "windef.h"
  38
  39 #include "file.h"
  40 #include "thread.h"
  41 #include "request.h"
  42
  43
  44 #if defined(__sun) || defined(__sun__)
  45
  46 /* retrieve a thread context */
  47 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  48 {
  49     int pid = get_ptrace_pid(thread);
  50     if (flags & CONTEXT_FULL)
  51     {
  52         struct regs regs;
  53         if (ptrace( PTRACE_GETREGS, pid, 0, (int) &regs ) == -1) goto error;
  54         if (flags & CONTEXT_INTEGER)
  55         {
  56             context->g0 = 0;
  57             context->g1 = regs.r_g1;
  58             context->g2 = regs.r_g2;
  59             context->g3 = regs.r_g3;
  60             context->g4 = regs.r_g4;
  61             context->g5 = regs.r_g5;
  62             context->g6 = regs.r_g6;
  63             context->g7 = regs.r_g7;
  64
  65             context->o0 = regs.r_o0;
  66             context->o1 = regs.r_o1;
  67             context->o2 = regs.r_o2;
  68             context->o3 = regs.r_o3;
  69             context->o4 = regs.r_o4;
  70             context->o5 = regs.r_o5;
  71             context->o6 = regs.r_o6;
  72             context->o7 = regs.r_o7;
  73
  74             /* FIXME: local and in registers */
  75         }
  76         if (flags & CONTEXT_CONTROL)
  77         {
  78             context->psr = regs.r_psr;
  79             context->pc  = regs.r_pc;
  80             context->npc = regs.r_npc;
  81             context->y   = regs.r_y;
  82             context->wim = 0;  /* FIXME */
  83             context->tbr = 0;  /* FIXME */
  84         }
  85     }
  86     if (flags & CONTEXT_FLOATING_POINT)
  87     {
  88         /* FIXME */
  89     }
  90     return;
  91  error:
  92     file_set_error();
  93 }
  94
  95
  96 /* set a thread context */
  97 static void set_thread_context( struct thread *thread, unsigned int flags, const CONTEXT *context )
  98 {
  99     /* FIXME */
 100 }
 101
 102 #else  /* __sun__ */
 103 #error You must implement get/set_thread_context for your platform
 104 #endif  /* __sun__ */
 105
 106
 107 /* copy a context structure according to the flags */
 108 static void copy_context( CONTEXT *to, const CONTEXT *from, int flags )
 109 {
 110     if (flags & CONTEXT_CONTROL)
 111     {
 112         to->psr    = from->psr;
 113         to->pc     = from->pc;
 114         to->npc    = from->npc;
 115         to->y      = from->y;
 116         to->wim    = from->wim;
 117         to->tbr    = from->tbr;
 118     }
 119     if (flags & CONTEXT_INTEGER)
 120     {
 121         to->g0 = from->g0;
 122         to->g1 = from->g1;
 123         to->g2 = from->g2;
 124         to->g3 = from->g3;
 125         to->g4 = from->g4;
 126         to->g5 = from->g5;
 127         to->g6 = from->g6;
 128         to->g7 = from->g7;
 129         to->o0 = from->o0;
 130         to->o1 = from->o1;
 131         to->o2 = from->o2;
 132         to->o3 = from->o3;
 133         to->o4 = from->o4;
 134         to->o5 = from->o5;
 135         to->o6 = from->o6;
 136         to->o7 = from->o7;
 137         to->l0 = from->l0;
 138         to->l1 = from->l1;
 139         to->l2 = from->l2;
 140         to->l3 = from->l3;
 141         to->l4 = from->l4;
 142         to->l5 = from->l5;
 143         to->l6 = from->l6;
 144         to->l7 = from->l7;
 145         to->i0 = from->i0;
 146         to->i1 = from->i1;
 147         to->i2 = from->i2;
 148         to->i3 = from->i3;
 149         to->i4 = from->i4;
 150         to->i5 = from->i5;
 151         to->i6 = from->i6;
 152         to->i7 = from->i7;
 153     }
 154     if (flags & CONTEXT_FLOATING_POINT)
 155     {
 156         /* FIXME */
 157     }
 158 }
 159
 160 /* retrieve the current instruction pointer of a thread */
 161 void *get_thread_ip( struct thread *thread )
 162 {
 163     CONTEXT context;
 164     context.pc = 0;
 165     if (suspend_for_ptrace( thread ))
 166     {
 167         get_thread_context( thread, CONTEXT_CONTROL, &context );
 168         resume_after_ptrace( thread );
 169     }
 170     return (void *)context.pc;
 171 }
 172
 173 /* determine if we should continue the thread in single-step mode */
 174 int get_thread_single_step( struct thread *thread )
 175 {
 176     return 0;  /* FIXME */
 177 }
 178
 179 /* send a signal to a specific thread */
 180 int tkill( int pid, int sig )
 181 {
 182     /* FIXME: should do something here */
 183     errno = ENOSYS;
 184     return -1;
 185 }
 186
 187 /* retrieve the current context of a thread */
 188 DECL_HANDLER(get_thread_context)
 189 {
 190     struct thread *thread;
 191     void *data;
 192     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 193
 194     if (get_reply_max_size() < sizeof(CONTEXT))
 195     {
 196         set_error( STATUS_INVALID_PARAMETER );
 197         return;
 198     }
 199     if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
 200
 201     if ((data = set_reply_data_size( sizeof(CONTEXT) )))
 202     {
 203         if (thread->context)  /* thread is inside an exception event */
 204         {
 205             copy_context( data, thread->context, flags );
 206             flags = 0;
 207         }
 208         if (flags && suspend_for_ptrace( thread ))
 209         {
 210             get_thread_context( thread, flags, data );
 211             resume_after_ptrace( thread );
 212         }
 213     }
 214     release_object( thread );
 215 }
 216
 217
 218 /* set the current context of a thread */
 219 DECL_HANDLER(set_thread_context)
 220 {
 221     struct thread *thread;
 222     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 223
 224     if (get_req_data_size() < sizeof(CONTEXT))
 225     {
 226         set_error( STATUS_INVALID_PARAMETER );
 227         return;
 228     }
 229     if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
 230     {
 231         if (thread->context)  /* thread is inside an exception event */
 232         {
 233             copy_context( thread->context, get_req_data(), flags );
 234             flags = 0;
 235         }
 236         if (flags && suspend_for_ptrace( thread ))
 237         {
 238             set_thread_context( thread, flags, get_req_data() );
 239             resume_after_ptrace( thread );
 240         }
 241         release_object( thread );
 242     }
 243 }
 244
 245 #endif  /* __sparc__ */