aboutsummaryrefslogtreecommitdiff
path: root/gdb/proc-service.c
blob: b69207e6b5458eb4d3517e93897e24d186eb0a53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
/* <proc_service.h> implementation.
   Copyright 1999, 2000 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"

#include "gdb_proc_service.h"
#include <sys/procfs.h>

#include "inferior.h"
#include "symtab.h"
#include "target.h"

/* Prototypes for supply_gregset etc.  */
#include "gregset.h"


/* Fix-up some broken systems.  */

/* The prototypes in <proc_service.h> are slightly different on older
   systems.  Compensate for the discrepancies.  */

#ifdef PROC_SERVICE_IS_OLD
typedef const struct ps_prochandle *gdb_ps_prochandle_t;
typedef char *gdb_ps_read_buf_t;
typedef char *gdb_ps_write_buf_t;
typedef int gdb_ps_size_t;
#else
typedef struct ps_prochandle *gdb_ps_prochandle_t;
typedef void *gdb_ps_read_buf_t;
typedef const void *gdb_ps_write_buf_t;
typedef size_t gdb_ps_size_t;
#endif


/* Building process ids.  */

#ifndef MERGEPID
#define MERGEPID(PID, TID)	(((PID) & 0xffff) | ((TID) << 16))
#endif

#define BUILD_LWP(tid, pid)	MERGEPID (pid, tid)


/* Helper functions.  */

static void
restore_inferior_pid (void *arg)
{
  int *saved_pid_ptr = arg;
  inferior_pid = *saved_pid_ptr;
  free (arg);
}

static struct cleanup *
save_inferior_pid (void)
{
  int *saved_pid_ptr;

  saved_pid_ptr = xmalloc (sizeof (int));
  *saved_pid_ptr = inferior_pid;
  return make_cleanup (restore_inferior_pid, saved_pid_ptr);
}

/* Transfer LEN bytes of memory between BUF and address ADDR in the
   process specified by PH.  If WRITE, transfer them to the process,
   else transfer them from the process.  Returns PS_OK for success,
   PS_ERR on failure.

   This is a helper function for ps_pdread, ps_pdwrite, ps_ptread and
   ps_ptwrite.  */

static ps_err_e
ps_xfer_memory (const struct ps_prochandle *ph, paddr_t addr,
		char *buf, size_t len, int write)
{
  struct cleanup *old_chain = save_inferior_pid ();
  int ret;

  inferior_pid = ph->pid;

  if (write)
    ret = target_write_memory (addr, buf, len);
  else
    ret = target_read_memory (addr, buf, len);

  do_cleanups (old_chain);

  return (ret == 0 ? PS_OK : PS_ERR);
}


/* Stop the target process PH.  */

ps_err_e
ps_pstop (gdb_ps_prochandle_t ph)
{
  /* The process is always stopped when under control of GDB.  */
  return PS_OK;
}

/* Resume the target process PH.  */

ps_err_e
ps_pcontinue (gdb_ps_prochandle_t ph)
{
  /* Pretend we did successfully continue the process.  GDB will take
     care of it later on.  */
  return PS_OK;
}

/* Stop the lightweight process LWPID within the target process PH.  */

ps_err_e
ps_lstop (gdb_ps_prochandle_t ph, lwpid_t lwpid)
{
  /* All lightweight processes are stopped when under control of GDB.  */
  return PS_OK;
}

/* Resume the lightweight process (LWP) LWPID within the target
   process PH.  */

ps_err_e
ps_lcontinue (gdb_ps_prochandle_t ph, lwpid_t lwpid)
{
  /* Pretend we did successfully continue LWPID.  GDB will take care
     of it later on.  */
  return PS_OK;
}

/* Get the size of the architecture-dependent extra state registers
   for LWP LWPID within the target process PH and return it in
   *XREGSIZE.  */

ps_err_e
ps_lgetxregsize (gdb_ps_prochandle_t ph, lwpid_t lwpid, int *xregsize)
{
  /* FIXME: Not supported yet.  */
  return PS_OK;
}

/* Get the extra state registers of LWP LWPID within the target
   process PH and store them in XREGSET.  */

ps_err_e
ps_lgetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
{
  /* FIXME: Not supported yet.  */
  return PS_OK;
}

/* Set the extra state registers of LWP LWPID within the target
   process PH from XREGSET.  */

ps_err_e
ps_lsetxregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, caddr_t xregset)
{
  /* FIXME: Not supported yet.  */
  return PS_OK;
}

/* Log (additional) diognostic information.  */

void
ps_plog (const char *fmt, ...)
{
  va_list args;

  va_start (args, fmt);
  vfprintf_filtered (gdb_stderr, fmt, args);
}

/* Search for the symbol named NAME within the object named OBJ within
   the target process PH.  If the symbol is found the address of the
   symbol is stored in SYM_ADDR.  */

ps_err_e
ps_pglobal_lookup (gdb_ps_prochandle_t ph, const char *obj,
		   const char *name, paddr_t *sym_addr)
{
  struct minimal_symbol *ms;

  /* FIXME: kettenis/2000-09-03: What should we do with OBJ?  */
  ms = lookup_minimal_symbol (name, NULL, NULL);
  if (ms == NULL)
    return PS_NOSYM;

  *sym_addr = SYMBOL_VALUE_ADDRESS (ms);
  return PS_OK;
}

/* Read SIZE bytes from the target process PH at address ADDR and copy
   them into BUF.  */

ps_err_e
ps_pdread (gdb_ps_prochandle_t ph, paddr_t addr,
	   gdb_ps_read_buf_t buf, gdb_ps_size_t size)
{
  return ps_xfer_memory (ph, addr, buf, size, 0);
}

/* Write SIZE bytes from BUF into the target process PH at address ADDR.  */

ps_err_e
ps_pdwrite (gdb_ps_prochandle_t ph, paddr_t addr,
	    gdb_ps_write_buf_t buf, gdb_ps_size_t size)
{
  return ps_xfer_memory (ph, addr, (char *) buf, size, 1);
}

/* Read SIZE bytes from the target process PH at address ADDR and copy
   them into BUF.  */

ps_err_e
ps_ptread (gdb_ps_prochandle_t ph, paddr_t addr,
	   gdb_ps_read_buf_t buf, gdb_ps_size_t size)
{
  return ps_xfer_memory (ph, addr, buf, size, 0);
}

/* Write SIZE bytes from BUF into the target process PH at address ADDR.  */

ps_err_e
ps_ptwrite (gdb_ps_prochandle_t ph, paddr_t addr,
	    gdb_ps_write_buf_t buf, gdb_ps_size_t size)
{
  return ps_xfer_memory (ph, addr, (char *) buf, size, 1);
}

/* Get the general registers of LWP LWPID within the target process PH
   and store them in GREGSET.  */

ps_err_e
ps_lgetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, prgregset_t gregset)
{
  struct cleanup *old_chain = save_inferior_pid ();

  inferior_pid = BUILD_LWP (lwpid, ph->pid);

  target_fetch_registers (-1);
  fill_gregset ((gdb_gregset_t *) gregset, -1);

  do_cleanups (old_chain);
  return PS_OK;
}

/* Set the general registers of LWP LWPID within the target process PH
   from GREGSET.  */

ps_err_e
ps_lsetregs (gdb_ps_prochandle_t ph, lwpid_t lwpid, const prgregset_t gregset)
{
  struct cleanup *old_chain = save_inferior_pid ();

  inferior_pid = BUILD_LWP (lwpid, ph->pid);

  /* FIXME: We should really make supply_gregset const-correct.  */
  supply_gregset ((gdb_gregset_t *) gregset);
  target_store_registers (-1);

  do_cleanups (old_chain);
  return PS_OK;
}

/* Get the floating-point registers of LWP LWPID within the target
   process PH and store them in FPREGSET.  */

ps_err_e
ps_lgetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
	       gdb_prfpregset_t *fpregset)
{
  struct cleanup *old_chain = save_inferior_pid ();

  inferior_pid = BUILD_LWP (lwpid, ph->pid);

  target_fetch_registers (-1);
  fill_fpregset ((gdb_fpregset_t *) fpregset, -1);

  do_cleanups (old_chain);
  return PS_OK;
}

/* Set the floating-point registers of LWP LWPID within the target
   process PH from FPREGSET.  */

ps_err_e
ps_lsetfpregs (gdb_ps_prochandle_t ph, lwpid_t lwpid,
	       const gdb_prfpregset_t *fpregset)
{
  struct cleanup *old_chain = save_inferior_pid ();

  inferior_pid = BUILD_LWP (lwpid, ph->pid);

  /* FIXME: We should really make supply_fpregset const-correct.  */
  supply_fpregset ((gdb_fpregset_t *) fpregset);
  target_store_registers (-1);

  do_cleanups (old_chain);
  return PS_OK;
}

/* Return overall process id of the target PH.
   Special for Linux -- not used on Solaris.  */

pid_t
ps_getpid (gdb_ps_prochandle_t ph)
{
  return ph->pid;
}

void
_initialize_proc_service (void)
{
  /* This function solely exists to make sure this module is linked
     into the final binary.  */
}