server/context_sparc.c

   1 /*
   2  * Sparc register context support
   3  *
   4  * Copyright (C) 2000 Ulrich Weigand
   5  */
   6
   7 #include "config.h"
   8
   9 #ifdef __sparc__
  10
  11 #include <assert.h>
  12 #include <errno.h>
  13 #include <sys/types.h>
  14 #ifdef HAVE_SYS_REG_H
  15 #include <sys/reg.h>
  16 #endif
  17 #include <unistd.h>
  18 #include <sys/ptrace.h>
  19 #include <sys/user.h>
  20
  21 #include "winbase.h"
  22
  23 #include "thread.h"
  24 #include "request.h"
  25
  26
  27 #if defined(__sun) || defined(__sun__)
  28
  29 /* retrieve a thread context */
  30 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  31 {
  32     int pid = thread->unix_pid;
  33     if (flags & CONTEXT_FULL)
  34     {
  35         struct regs regs;
  36         if (ptrace( PTRACE_GETREGS, pid, 0, (int) &regs ) == -1) goto error;
  37         if (flags & CONTEXT_INTEGER)
  38         {
  39             context->g0 = 0;
  40             context->g1 = regs.r_g1;
  41             context->g2 = regs.r_g2;
  42             context->g3 = regs.r_g3;
  43             context->g4 = regs.r_g4;
  44             context->g5 = regs.r_g5;
  45             context->g6 = regs.r_g6;
  46             context->g7 = regs.r_g7;
  47
  48             context->o0 = regs.r_o0;
  49             context->o1 = regs.r_o1;
  50             context->o2 = regs.r_o2;
  51             context->o3 = regs.r_o3;
  52             context->o4 = regs.r_o4;
  53             context->o5 = regs.r_o5;
  54             context->o6 = regs.r_o6;
  55             context->o7 = regs.r_o7;
  56
  57             /* FIXME: local and in registers */
  58         }
  59         if (flags & CONTEXT_CONTROL)
  60         {
  61             context->psr = regs.r_psr;
  62             context->pc  = regs.r_pc;
  63             context->npc = regs.r_npc;
  64             context->y   = regs.r_y;
  65             context->wim = 0;  /* FIXME */
  66             context->tbr = 0;  /* FIXME */
  67         }
  68     }
  69     if (flags & CONTEXT_FLOATING_POINT)
  70     {
  71         /* FIXME */
  72     }
  73     return;
  74  error:
  75     file_set_error();
  76 }
  77
  78
  79 /* set a thread context */
  80 static void set_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  81 {
  82     /* FIXME */
  83 }
  84
  85 #else  /* __sun__ */
  86 #error You must implement get/set_thread_context for your platform
  87 #endif  /* __sun__ */
  88
  89
  90 /* copy a context structure according to the flags */
  91 static void copy_context( CONTEXT *to, CONTEXT *from, int flags )
  92 {
  93     if (flags & CONTEXT_CONTROL)
  94     {
  95         to->psr    = from->psr;
  96         to->pc     = from->pc;
  97         to->npc    = from->npc;
  98         to->y      = from->y;
  99         to->wim    = from->wim;
 100         to->tbr    = from->tbr;
 101     }
 102     if (flags & CONTEXT_INTEGER)
 103     {
 104         to->g0 = from->g0;
 105         to->g1 = from->g1;
 106         to->g2 = from->g2;
 107         to->g3 = from->g3;
 108         to->g4 = from->g4;
 109         to->g5 = from->g5;
 110         to->g6 = from->g6;
 111         to->g7 = from->g7;
 112         to->o0 = from->o0;
 113         to->o1 = from->o1;
 114         to->o2 = from->o2;
 115         to->o3 = from->o3;
 116         to->o4 = from->o4;
 117         to->o5 = from->o5;
 118         to->o6 = from->o6;
 119         to->o7 = from->o7;
 120         to->l0 = from->l0;
 121         to->l1 = from->l1;
 122         to->l2 = from->l2;
 123         to->l3 = from->l3;
 124         to->l4 = from->l4;
 125         to->l5 = from->l5;
 126         to->l6 = from->l6;
 127         to->l7 = from->l7;
 128         to->i0 = from->i0;
 129         to->i1 = from->i1;
 130         to->i2 = from->i2;
 131         to->i3 = from->i3;
 132         to->i4 = from->i4;
 133         to->i5 = from->i5;
 134         to->i6 = from->i6;
 135         to->i7 = from->i7;
 136     }
 137     if (flags & CONTEXT_FLOATING_POINT)
 138     {
 139         /* FIXME */
 140     }
 141 }
 142
 143 /* retrieve the current instruction pointer of a thread */
 144 void *get_thread_ip( struct thread *thread )
 145 {
 146     CONTEXT context;
 147     context.pc = 0;
 148     if (suspend_for_ptrace( thread ))
 149     {
 150         get_thread_context( thread, CONTEXT_CONTROL, &context );
 151         resume_thread( thread );
 152     }
 153     return (void *)context.pc;
 154 }
 155
 156 /* retrieve the current context of a thread */
 157 DECL_HANDLER(get_thread_context)
 158 {
 159     struct thread *thread;
 160     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 161
 162     if (get_req_data_size(req) < sizeof(CONTEXT))
 163     {
 164         set_error( STATUS_INVALID_PARAMETER );
 165         return;
 166     }
 167     if ((thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT )))
 168     {
 169         if (thread->context)  /* thread is inside an exception event */
 170         {
 171             copy_context( get_req_data(req), thread->context, flags );
 172             flags = 0;
 173         }
 174         if (flags && suspend_for_ptrace( thread ))
 175         {
 176             get_thread_context( thread, flags, get_req_data(req) );
 177             resume_thread( thread );
 178         }
 179         release_object( thread );
 180     }
 181 }
 182
 183
 184 /* set the current context of a thread */
 185 DECL_HANDLER(set_thread_context)
 186 {
 187     struct thread *thread;
 188     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 189
 190     if (get_req_data_size(req) < sizeof(CONTEXT))
 191     {
 192         set_error( STATUS_INVALID_PARAMETER );
 193         return;
 194     }
 195     if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
 196     {
 197         if (thread->context)  /* thread is inside an exception event */
 198         {
 199             copy_context( thread->context, get_req_data(req), flags );
 200             flags = 0;
 201         }
 202         if (flags && suspend_for_ptrace( thread ))
 203         {
 204             set_thread_context( thread, flags, get_req_data(req) );
 205             resume_thread( thread );
 206         }
 207         release_object( thread );
 208     }
 209 }
 210
 211 #endif  /* __sparc__ */