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/* Register support routines for the remote server for GDB.
   Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010
   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 3 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, see <http://www.gnu.org/licenses/>.  */
 
#include "server.h"
#include "regdef.h"
 
#include <stdlib.h>
#include <string.h>
 
static int register_bytes;
 
static struct reg *reg_defs;
static int num_registers;
 
const char **gdbserver_expedite_regs;
 
#ifndef IN_PROCESS_AGENT
 
struct regcache *
get_thread_regcache (struct thread_info *thread, int fetch)
{
  struct regcache *regcache;
 
  regcache = (struct regcache *) inferior_regcache_data (thread);
 
  if (regcache == NULL)
    fatal ("no register cache");
 
  if (fetch && regcache->registers_valid == 0)
    {
      struct thread_info *saved_inferior = current_inferior;
 
      current_inferior = thread;
      fetch_inferior_registers (regcache, -1);
      current_inferior = saved_inferior;
      regcache->registers_valid = 1;
    }
 
  return regcache;
}
 
void
regcache_invalidate_one (struct inferior_list_entry *entry)
{
  struct thread_info *thread = (struct thread_info *) entry;
  struct regcache *regcache;
 
  regcache = (struct regcache *) inferior_regcache_data (thread);
 
  if (regcache == NULL)
    return;
 
  if (regcache->registers_valid)
    {
      struct thread_info *saved_inferior = current_inferior;
 
      current_inferior = thread;
      store_inferior_registers (regcache, -1);
      current_inferior = saved_inferior;
    }
 
  regcache->registers_valid = 0;
}
 
void
regcache_invalidate (void)
{
  for_each_inferior (&all_threads, regcache_invalidate_one);
}
 
#endif
 
struct regcache *
init_register_cache (struct regcache *regcache, unsigned char *regbuf)
{
#ifndef IN_PROCESS_AGENT
  if (regbuf == NULL)
    {
      /* Make sure to zero-initialize the register cache when it is
         created, in case there are registers the target never
         fetches.  This way they'll read as zero instead of
         garbage.  */
      regcache->registers = xcalloc (1, register_bytes);
      regcache->registers_owned = 1;
    }
  else
#else
  if (regbuf == NULL)
    fatal ("init_register_cache: can't allocate memory from the heap");
  else
#endif
    {
      regcache->registers = regbuf;
      regcache->registers_owned = 0;
    }
 
  regcache->registers_valid = 0;
 
  return regcache;
}
 
#ifndef IN_PROCESS_AGENT
 
struct regcache *
new_register_cache (void)
{
  struct regcache *regcache;
 
  if (register_bytes == 0)
    return NULL; /* The architecture hasn't been initialized yet.  */
 
  regcache = xmalloc (sizeof (*regcache));
  return init_register_cache (regcache, NULL);
}
 
void
free_register_cache (struct regcache *regcache)
{
  if (regcache)
    {
      if (regcache->registers_owned)
        free (regcache->registers);
      free (regcache);
    }
}
 
#endif
 
void
regcache_cpy (struct regcache *dst, struct regcache *src)
{
  memcpy (dst->registers, src->registers, register_bytes);
  dst->registers_valid = src->registers_valid;
}
 
#ifndef IN_PROCESS_AGENT
static void
realloc_register_cache (struct inferior_list_entry *thread_p)
{
  struct thread_info *thread = (struct thread_info *) thread_p;
  struct regcache *regcache
    = (struct regcache *) inferior_regcache_data (thread);
 
  if (regcache != NULL)
    regcache_invalidate_one (thread_p);
  free_register_cache (regcache);
  set_inferior_regcache_data (thread, new_register_cache ());
}
#endif
 
void
set_register_cache (struct reg *regs, int n)
{
  int offset, i;
 
#ifndef IN_PROCESS_AGENT
  /* Before changing the register cache internal layout, flush the
     contents of valid caches back to the threads.  */
  regcache_invalidate ();
#endif
 
  reg_defs = regs;
  num_registers = n;
 
  offset = 0;
  for (i = 0; i < n; i++)
    {
      regs[i].offset = offset;
      offset += regs[i].size;
    }
 
  register_bytes = offset / 8;
 
  /* Make sure PBUFSIZ is large enough to hold a full register packet.  */
  if (2 * register_bytes + 32 > PBUFSIZ)
    fatal ("Register packet size exceeds PBUFSIZ.");
 
#ifndef IN_PROCESS_AGENT
  /* Re-allocate all pre-existing register caches.  */
  for_each_inferior (&all_threads, realloc_register_cache);
#endif
}
 
int
register_cache_size (void)
{
  return register_bytes;
}
 
#ifndef IN_PROCESS_AGENT
 
void
registers_to_string (struct regcache *regcache, char *buf)
{
  unsigned char *registers = regcache->registers;
 
  convert_int_to_ascii (registers, buf, register_bytes);
}
 
void
registers_from_string (struct regcache *regcache, char *buf)
{
  int len = strlen (buf);
  unsigned char *registers = regcache->registers;
 
  if (len != register_bytes * 2)
    {
      warning ("Wrong sized register packet (expected %d bytes, got %d)",
               2*register_bytes, len);
      if (len > register_bytes * 2)
        len = register_bytes * 2;
    }
  convert_ascii_to_int (buf, registers, len / 2);
}
 
struct reg *
find_register_by_name (const char *name)
{
  int i;
 
  for (i = 0; i < num_registers; i++)
    if (!strcmp (name, reg_defs[i].name))
      return &reg_defs[i];
  fatal ("Unknown register %s requested", name);
  return 0;
}
 
int
find_regno (const char *name)
{
  int i;
 
  for (i = 0; i < num_registers; i++)
    if (!strcmp (name, reg_defs[i].name))
      return i;
  fatal ("Unknown register %s requested", name);
  return -1;
}
 
struct reg *
find_register_by_number (int n)
{
  return &reg_defs[n];
}
 
#endif
 
int
register_size (int n)
{
  return reg_defs[n].size / 8;
}
 
static unsigned char *
register_data (struct regcache *regcache, int n, int fetch)
{
  return regcache->registers + (reg_defs[n].offset / 8);
}
 
void
supply_register (struct regcache *regcache, int n, const void *buf)
{
  if (buf)
    memcpy (register_data (regcache, n, 0), buf, register_size (n));
  else
    memset (register_data (regcache, n, 0), 0, register_size (n));
}
 
void
supply_regblock (struct regcache *regcache, const void *buf)
{
  if (buf)
    memcpy (regcache->registers, buf, register_bytes);
  else
    memset (regcache->registers, 0, register_bytes);
}
 
#ifndef IN_PROCESS_AGENT
 
void
supply_register_by_name (struct regcache *regcache,
                         const char *name, const void *buf)
{
  supply_register (regcache, find_regno (name), buf);
}
 
#endif
 
void
collect_register (struct regcache *regcache, int n, void *buf)
{
  memcpy (buf, register_data (regcache, n, 1), register_size (n));
}
 
#ifndef IN_PROCESS_AGENT
 
void
collect_register_as_string (struct regcache *regcache, int n, char *buf)
{
  convert_int_to_ascii (register_data (regcache, n, 1),
                        buf, register_size (n));
}
 
void
collect_register_by_name (struct regcache *regcache,
                          const char *name, void *buf)
{
  collect_register (regcache, find_regno (name), buf);
}
 
/* Special handling for register PC.  */
 
CORE_ADDR
regcache_read_pc (struct regcache *regcache)
{
  CORE_ADDR pc_val;
 
  if (the_target->read_pc)
    pc_val = the_target->read_pc (regcache);
  else
    internal_error (__FILE__, __LINE__,
                    "regcache_read_pc: Unable to find PC");
 
  return pc_val;
}
 
void
regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
  if (the_target->write_pc)
    the_target->write_pc (regcache, pc);
  else
    internal_error (__FILE__, __LINE__,
                    "regcache_write_pc: Unable to update PC");
}
 
#endif

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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [gdb/] [gdbserver/] [regcache.c] - Blame information for rev 446

Line No.	Rev	Author	Line
1	330	jeremybenn	`/* Register support routines for the remote server for GDB.`
2			`Copyright (C) 2001, 2002, 2004, 2005, 2007, 2008, 2009, 2010`
3			`Free Software Foundation, Inc.`
4
5			`This file is part of GDB.`
6
7			`This program is free software; you can redistribute it and/or modify`
8			`it under the terms of the GNU General Public License as published by`
9			`the Free Software Foundation; either version 3 of the License, or`
10			`(at your option) any later version.`
11
12			`This program is distributed in the hope that it will be useful,`
13			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
15			`GNU General Public License for more details.`
16
17			`You should have received a copy of the GNU General Public License`
18			`along with this program. If not, see <http://www.gnu.org/licenses/>. */`
19
20			`#include "server.h"`
21			`#include "regdef.h"`
22
23			`#include <stdlib.h>`
24			`#include <string.h>`
25
26			`static int register_bytes;`
27
28			`static struct reg *reg_defs;`
29			`static int num_registers;`
30
31			`const char **gdbserver_expedite_regs;`
32
33			`#ifndef IN_PROCESS_AGENT`
34
35			`struct regcache *`
36			`get_thread_regcache (struct thread_info *thread, int fetch)`
37			`{`
38			`struct regcache *regcache;`
39
40			`regcache = (struct regcache *) inferior_regcache_data (thread);`
41
42			`if (regcache == NULL)`
43			`fatal ("no register cache");`
44
45			`if (fetch && regcache->registers_valid == 0)`
46			`{`
47			`struct thread_info *saved_inferior = current_inferior;`
48
49			`current_inferior = thread;`
50			`fetch_inferior_registers (regcache, -1);`
51			`current_inferior = saved_inferior;`
52			`regcache->registers_valid = 1;`
53			`}`
54
55			`return regcache;`
56			`}`
57
58			`void`
59			`regcache_invalidate_one (struct inferior_list_entry *entry)`
60			`{`
61			`struct thread_info thread = (struct thread_info ) entry;`
62			`struct regcache *regcache;`
63
64			`regcache = (struct regcache *) inferior_regcache_data (thread);`
65
66			`if (regcache == NULL)`
67			`return;`
68
69			`if (regcache->registers_valid)`
70			`{`
71			`struct thread_info *saved_inferior = current_inferior;`
72
73			`current_inferior = thread;`
74			`store_inferior_registers (regcache, -1);`
75			`current_inferior = saved_inferior;`
76			`}`
77
78			`regcache->registers_valid = 0;`
79			`}`
80
81			`void`
82			`regcache_invalidate (void)`
83			`{`
84			`for_each_inferior (&all_threads, regcache_invalidate_one);`
85			`}`
86
87			`#endif`
88
89			`struct regcache *`
90			`init_register_cache (struct regcache regcache, unsigned char regbuf)`
91			`{`
92			`#ifndef IN_PROCESS_AGENT`
93			`if (regbuf == NULL)`
94			`{`
95			`/* Make sure to zero-initialize the register cache when it is`
96			`created, in case there are registers the target never`
97			`fetches. This way they'll read as zero instead of`
98			`garbage. */`
99			`regcache->registers = xcalloc (1, register_bytes);`
100			`regcache->registers_owned = 1;`
101			`}`
102			`else`
103			`#else`
104			`if (regbuf == NULL)`
105			`fatal ("init_register_cache: can't allocate memory from the heap");`
106			`else`
107			`#endif`
108			`{`
109			`regcache->registers = regbuf;`
110			`regcache->registers_owned = 0;`
111			`}`
112
113			`regcache->registers_valid = 0;`
114
115			`return regcache;`
116			`}`
117
118			`#ifndef IN_PROCESS_AGENT`
119
120			`struct regcache *`
121			`new_register_cache (void)`
122			`{`
123			`struct regcache *regcache;`
124
125			`if (register_bytes == 0)`
126			`return NULL; /* The architecture hasn't been initialized yet. */`
127
128			`regcache = xmalloc (sizeof (*regcache));`
129			`return init_register_cache (regcache, NULL);`
130			`}`
131
132			`void`
133			`free_register_cache (struct regcache *regcache)`
134			`{`
135			`if (regcache)`
136			`{`
137			`if (regcache->registers_owned)`
138			`free (regcache->registers);`
139			`free (regcache);`
140			`}`
141			`}`
142
143			`#endif`
144
145			`void`
146			`regcache_cpy (struct regcache dst, struct regcache src)`
147			`{`
148			`memcpy (dst->registers, src->registers, register_bytes);`
149			`dst->registers_valid = src->registers_valid;`
150			`}`
151
152			`#ifndef IN_PROCESS_AGENT`
153			`static void`
154			`realloc_register_cache (struct inferior_list_entry *thread_p)`
155			`{`
156			`struct thread_info thread = (struct thread_info ) thread_p;`
157			`struct regcache *regcache`
158			`= (struct regcache *) inferior_regcache_data (thread);`
159
160			`if (regcache != NULL)`
161			`regcache_invalidate_one (thread_p);`
162			`free_register_cache (regcache);`
163			`set_inferior_regcache_data (thread, new_register_cache ());`
164			`}`
165			`#endif`
166
167			`void`
168			`set_register_cache (struct reg *regs, int n)`
169			`{`
170			`int offset, i;`
171
172			`#ifndef IN_PROCESS_AGENT`
173			`/* Before changing the register cache internal layout, flush the`
174			`contents of valid caches back to the threads. */`
175			`regcache_invalidate ();`
176			`#endif`
177
178			`reg_defs = regs;`
179			`num_registers = n;`
180
181			`offset = 0;`
182			`for (i = 0; i < n; i++)`
183			`{`
184			`regs[i].offset = offset;`
185			`offset += regs[i].size;`
186			`}`
187
188			`register_bytes = offset / 8;`
189
190			`/* Make sure PBUFSIZ is large enough to hold a full register packet. */`
191			`if (2 * register_bytes + 32 > PBUFSIZ)`
192			`fatal ("Register packet size exceeds PBUFSIZ.");`
193
194			`#ifndef IN_PROCESS_AGENT`
195			`/* Re-allocate all pre-existing register caches. */`
196			`for_each_inferior (&all_threads, realloc_register_cache);`
197			`#endif`
198			`}`
199
200			`int`
201			`register_cache_size (void)`
202			`{`
203			`return register_bytes;`
204			`}`
205
206			`#ifndef IN_PROCESS_AGENT`
207
208			`void`
209			`registers_to_string (struct regcache regcache, char buf)`
210			`{`
211			`unsigned char *registers = regcache->registers;`
212
213			`convert_int_to_ascii (registers, buf, register_bytes);`
214			`}`
215
216			`void`
217			`registers_from_string (struct regcache regcache, char buf)`
218			`{`
219			`int len = strlen (buf);`
220			`unsigned char *registers = regcache->registers;`
221
222			`if (len != register_bytes * 2)`
223			`{`
224			`warning ("Wrong sized register packet (expected %d bytes, got %d)",`
225			`2*register_bytes, len);`
226			`if (len > register_bytes * 2)`
227			`len = register_bytes * 2;`
228			`}`
229			`convert_ascii_to_int (buf, registers, len / 2);`
230			`}`
231
232			`struct reg *`
233			`find_register_by_name (const char *name)`
234			`{`
235			`int i;`
236
237			`for (i = 0; i < num_registers; i++)`
238			`if (!strcmp (name, reg_defs[i].name))`
239			`return &reg_defs[i];`
240			`fatal ("Unknown register %s requested", name);`
241			`return 0;`
242			`}`
243
244			`int`
245			`find_regno (const char *name)`
246			`{`
247			`int i;`
248
249			`for (i = 0; i < num_registers; i++)`
250			`if (!strcmp (name, reg_defs[i].name))`
251			`return i;`
252			`fatal ("Unknown register %s requested", name);`
253			`return -1;`
254			`}`
255
256			`struct reg *`
257			`find_register_by_number (int n)`
258			`{`
259			`return &reg_defs[n];`
260			`}`
261
262			`#endif`
263
264			`int`
265			`register_size (int n)`
266			`{`
267			`return reg_defs[n].size / 8;`
268			`}`
269
270			`static unsigned char *`
271			`register_data (struct regcache *regcache, int n, int fetch)`
272			`{`
273			`return regcache->registers + (reg_defs[n].offset / 8);`
274			`}`
275
276			`void`
277			`supply_register (struct regcache regcache, int n, const void buf)`
278			`{`
279			`if (buf)`
280			`memcpy (register_data (regcache, n, 0), buf, register_size (n));`
281			`else`
282			`memset (register_data (regcache, n, 0), 0, register_size (n));`
283			`}`
284
285			`void`
286			`supply_regblock (struct regcache regcache, const void buf)`
287			`{`
288			`if (buf)`
289			`memcpy (regcache->registers, buf, register_bytes);`
290			`else`
291			`memset (regcache->registers, 0, register_bytes);`
292			`}`
293
294			`#ifndef IN_PROCESS_AGENT`
295
296			`void`
297			`supply_register_by_name (struct regcache *regcache,`
298			`const char name, const void buf)`
299			`{`
300			`supply_register (regcache, find_regno (name), buf);`
301			`}`
302
303			`#endif`
304
305			`void`
306			`collect_register (struct regcache regcache, int n, void buf)`
307			`{`
308			`memcpy (buf, register_data (regcache, n, 1), register_size (n));`
309			`}`
310
311			`#ifndef IN_PROCESS_AGENT`
312
313			`void`
314			`collect_register_as_string (struct regcache regcache, int n, char buf)`
315			`{`
316			`convert_int_to_ascii (register_data (regcache, n, 1),`
317			`buf, register_size (n));`
318			`}`
319
320			`void`
321			`collect_register_by_name (struct regcache *regcache,`
322			`const char name, void buf)`
323			`{`
324			`collect_register (regcache, find_regno (name), buf);`
325			`}`
326
327			`/* Special handling for register PC. */`
328
329			`CORE_ADDR`
330			`regcache_read_pc (struct regcache *regcache)`
331			`{`
332			`CORE_ADDR pc_val;`
333
334			`if (the_target->read_pc)`
335			`pc_val = the_target->read_pc (regcache);`
336			`else`
337			`internal_error (__FILE__, __LINE__,`
338			`"regcache_read_pc: Unable to find PC");`
339
340			`return pc_val;`
341			`}`
342
343			`void`
344			`regcache_write_pc (struct regcache *regcache, CORE_ADDR pc)`
345			`{`
346			`if (the_target->write_pc)`
347			`the_target->write_pc (regcache, pc);`
348			`else`
349			`internal_error (__FILE__, __LINE__,`
350			`"regcache_write_pc: Unable to update PC");`
351			`}`
352
353			`#endif`