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 #ifdef HAVE_SYS_PTRACE_H
  19 # include <sys/ptrace.h>
  20 #endif
  21 #ifdef HAVE_SYS_USER_H
  22 # include <sys/user.h>
  23 #endif
  24
  25 #include "winbase.h"
  26
  27 #include "thread.h"
  28 #include "request.h"
  29
  30
  31 #if defined(__sun) || defined(__sun__)
  32
  33 /* retrieve a thread context */
  34 static void get_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  35 {
  36     int pid = thread->unix_pid;
  37     if (flags & CONTEXT_FULL)
  38     {
  39         struct regs regs;
  40         if (ptrace( PTRACE_GETREGS, pid, 0, (int) &regs ) == -1) goto error;
  41         if (flags & CONTEXT_INTEGER)
  42         {
  43             context->g0 = 0;
  44             context->g1 = regs.r_g1;
  45             context->g2 = regs.r_g2;
  46             context->g3 = regs.r_g3;
  47             context->g4 = regs.r_g4;
  48             context->g5 = regs.r_g5;
  49             context->g6 = regs.r_g6;
  50             context->g7 = regs.r_g7;
  51
  52             context->o0 = regs.r_o0;
  53             context->o1 = regs.r_o1;
  54             context->o2 = regs.r_o2;
  55             context->o3 = regs.r_o3;
  56             context->o4 = regs.r_o4;
  57             context->o5 = regs.r_o5;
  58             context->o6 = regs.r_o6;
  59             context->o7 = regs.r_o7;
  60
  61             /* FIXME: local and in registers */
  62         }
  63         if (flags & CONTEXT_CONTROL)
  64         {
  65             context->psr = regs.r_psr;
  66             context->pc  = regs.r_pc;
  67             context->npc = regs.r_npc;
  68             context->y   = regs.r_y;
  69             context->wim = 0;  /* FIXME */
  70             context->tbr = 0;  /* FIXME */
  71         }
  72     }
  73     if (flags & CONTEXT_FLOATING_POINT)
  74     {
  75         /* FIXME */
  76     }
  77     return;
  78  error:
  79     file_set_error();
  80 }
  81
  82
  83 /* set a thread context */
  84 static void set_thread_context( struct thread *thread, unsigned int flags, CONTEXT *context )
  85 {
  86     /* FIXME */
  87 }
  88
  89 #else  /* __sun__ */
  90 #error You must implement get/set_thread_context for your platform
  91 #endif  /* __sun__ */
  92
  93
  94 /* copy a context structure according to the flags */
  95 static void copy_context( CONTEXT *to, CONTEXT *from, int flags )
  96 {
  97     if (flags & CONTEXT_CONTROL)
  98     {
  99         to->psr    = from->psr;
 100         to->pc     = from->pc;
 101         to->npc    = from->npc;
 102         to->y      = from->y;
 103         to->wim    = from->wim;
 104         to->tbr    = from->tbr;
 105     }
 106     if (flags & CONTEXT_INTEGER)
 107     {
 108         to->g0 = from->g0;
 109         to->g1 = from->g1;
 110         to->g2 = from->g2;
 111         to->g3 = from->g3;
 112         to->g4 = from->g4;
 113         to->g5 = from->g5;
 114         to->g6 = from->g6;
 115         to->g7 = from->g7;
 116         to->o0 = from->o0;
 117         to->o1 = from->o1;
 118         to->o2 = from->o2;
 119         to->o3 = from->o3;
 120         to->o4 = from->o4;
 121         to->o5 = from->o5;
 122         to->o6 = from->o6;
 123         to->o7 = from->o7;
 124         to->l0 = from->l0;
 125         to->l1 = from->l1;
 126         to->l2 = from->l2;
 127         to->l3 = from->l3;
 128         to->l4 = from->l4;
 129         to->l5 = from->l5;
 130         to->l6 = from->l6;
 131         to->l7 = from->l7;
 132         to->i0 = from->i0;
 133         to->i1 = from->i1;
 134         to->i2 = from->i2;
 135         to->i3 = from->i3;
 136         to->i4 = from->i4;
 137         to->i5 = from->i5;
 138         to->i6 = from->i6;
 139         to->i7 = from->i7;
 140     }
 141     if (flags & CONTEXT_FLOATING_POINT)
 142     {
 143         /* FIXME */
 144     }
 145 }
 146
 147 /* retrieve the current instruction pointer of a thread */
 148 void *get_thread_ip( struct thread *thread )
 149 {
 150     CONTEXT context;
 151     context.pc = 0;
 152     if (suspend_for_ptrace( thread ))
 153     {
 154         get_thread_context( thread, CONTEXT_CONTROL, &context );
 155         resume_thread( thread );
 156     }
 157     return (void *)context.pc;
 158 }
 159
 160 /* determine if we should continue the thread in single-step mode */
 161 int get_thread_single_step( struct thread *thread )
 162 {
 163     return 0;  /* FIXME */
 164 }
 165
 166 /* retrieve the current context of a thread */
 167 DECL_HANDLER(get_thread_context)
 168 {
 169     struct thread *thread;
 170     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 171
 172     if (get_req_data_size(req) < sizeof(CONTEXT))
 173     {
 174         set_error( STATUS_INVALID_PARAMETER );
 175         return;
 176     }
 177     if ((thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT )))
 178     {
 179         if (thread->context)  /* thread is inside an exception event */
 180         {
 181             copy_context( get_req_data(req), thread->context, flags );
 182             flags = 0;
 183         }
 184         if (flags && suspend_for_ptrace( thread ))
 185         {
 186             get_thread_context( thread, flags, get_req_data(req) );
 187             resume_thread( thread );
 188         }
 189         release_object( thread );
 190     }
 191 }
 192
 193
 194 /* set the current context of a thread */
 195 DECL_HANDLER(set_thread_context)
 196 {
 197     struct thread *thread;
 198     int flags = req->flags & ~CONTEXT_SPARC;  /* get rid of CPU id */
 199
 200     if (get_req_data_size(req) < sizeof(CONTEXT))
 201     {
 202         set_error( STATUS_INVALID_PARAMETER );
 203         return;
 204     }
 205     if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
 206     {
 207         if (thread->context)  /* thread is inside an exception event */
 208         {
 209             copy_context( thread->context, get_req_data(req), flags );
 210             flags = 0;
 211         }
 212         if (flags && suspend_for_ptrace( thread ))
 213         {
 214             set_thread_context( thread, flags, get_req_data(req) );
 215             resume_thread( thread );
 216         }
 217         release_object( thread );
 218     }
 219 }
 220
 221 #endif  /* __sparc__ */