1 |
227 |
jeremybenn |
/* GNU/Linux on ARM native support.
|
2 |
|
|
Copyright (C) 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009,
|
3 |
|
|
2010 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 "defs.h"
|
21 |
|
|
#include "inferior.h"
|
22 |
|
|
#include "gdbcore.h"
|
23 |
|
|
#include "gdb_string.h"
|
24 |
|
|
#include "regcache.h"
|
25 |
|
|
#include "target.h"
|
26 |
|
|
#include "linux-nat.h"
|
27 |
|
|
#include "target-descriptions.h"
|
28 |
|
|
|
29 |
|
|
#include "arm-tdep.h"
|
30 |
|
|
#include "arm-linux-tdep.h"
|
31 |
|
|
|
32 |
|
|
#include <sys/user.h>
|
33 |
|
|
#include <sys/ptrace.h>
|
34 |
|
|
#include <sys/utsname.h>
|
35 |
|
|
#include <sys/procfs.h>
|
36 |
|
|
|
37 |
|
|
/* Prototypes for supply_gregset etc. */
|
38 |
|
|
#include "gregset.h"
|
39 |
|
|
|
40 |
|
|
/* Defines ps_err_e, struct ps_prochandle. */
|
41 |
|
|
#include "gdb_proc_service.h"
|
42 |
|
|
|
43 |
|
|
#include "features/arm-with-iwmmxt.c"
|
44 |
|
|
|
45 |
|
|
#ifndef PTRACE_GET_THREAD_AREA
|
46 |
|
|
#define PTRACE_GET_THREAD_AREA 22
|
47 |
|
|
#endif
|
48 |
|
|
|
49 |
|
|
#ifndef PTRACE_GETWMMXREGS
|
50 |
|
|
#define PTRACE_GETWMMXREGS 18
|
51 |
|
|
#define PTRACE_SETWMMXREGS 19
|
52 |
|
|
#endif
|
53 |
|
|
|
54 |
|
|
/* A flag for whether the WMMX registers are available. */
|
55 |
|
|
static int arm_linux_has_wmmx_registers;
|
56 |
|
|
|
57 |
|
|
extern int arm_apcs_32;
|
58 |
|
|
|
59 |
|
|
/* The following variables are used to determine the version of the
|
60 |
|
|
underlying GNU/Linux operating system. Examples:
|
61 |
|
|
|
62 |
|
|
GNU/Linux 2.0.35 GNU/Linux 2.2.12
|
63 |
|
|
os_version = 0x00020023 os_version = 0x0002020c
|
64 |
|
|
os_major = 2 os_major = 2
|
65 |
|
|
os_minor = 0 os_minor = 2
|
66 |
|
|
os_release = 35 os_release = 12
|
67 |
|
|
|
68 |
|
|
Note: os_version = (os_major << 16) | (os_minor << 8) | os_release
|
69 |
|
|
|
70 |
|
|
These are initialized using get_linux_version() from
|
71 |
|
|
_initialize_arm_linux_nat(). */
|
72 |
|
|
|
73 |
|
|
static unsigned int os_version, os_major, os_minor, os_release;
|
74 |
|
|
|
75 |
|
|
/* On GNU/Linux, threads are implemented as pseudo-processes, in which
|
76 |
|
|
case we may be tracing more than one process at a time. In that
|
77 |
|
|
case, inferior_ptid will contain the main process ID and the
|
78 |
|
|
individual thread (process) ID. get_thread_id () is used to get
|
79 |
|
|
the thread id if it's available, and the process id otherwise. */
|
80 |
|
|
|
81 |
|
|
int
|
82 |
|
|
get_thread_id (ptid_t ptid)
|
83 |
|
|
{
|
84 |
|
|
int tid = TIDGET (ptid);
|
85 |
|
|
if (0 == tid)
|
86 |
|
|
tid = PIDGET (ptid);
|
87 |
|
|
return tid;
|
88 |
|
|
}
|
89 |
|
|
#define GET_THREAD_ID(PTID) get_thread_id (PTID)
|
90 |
|
|
|
91 |
|
|
/* Get the value of a particular register from the floating point
|
92 |
|
|
state of the process and store it into regcache. */
|
93 |
|
|
|
94 |
|
|
static void
|
95 |
|
|
fetch_fpregister (struct regcache *regcache, int regno)
|
96 |
|
|
{
|
97 |
|
|
int ret, tid;
|
98 |
|
|
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
|
99 |
|
|
|
100 |
|
|
/* Get the thread id for the ptrace call. */
|
101 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
102 |
|
|
|
103 |
|
|
/* Read the floating point state. */
|
104 |
|
|
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
|
105 |
|
|
if (ret < 0)
|
106 |
|
|
{
|
107 |
|
|
warning (_("Unable to fetch floating point register."));
|
108 |
|
|
return;
|
109 |
|
|
}
|
110 |
|
|
|
111 |
|
|
/* Fetch fpsr. */
|
112 |
|
|
if (ARM_FPS_REGNUM == regno)
|
113 |
|
|
regcache_raw_supply (regcache, ARM_FPS_REGNUM,
|
114 |
|
|
fp + NWFPE_FPSR_OFFSET);
|
115 |
|
|
|
116 |
|
|
/* Fetch the floating point register. */
|
117 |
|
|
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
|
118 |
|
|
supply_nwfpe_register (regcache, regno, fp);
|
119 |
|
|
}
|
120 |
|
|
|
121 |
|
|
/* Get the whole floating point state of the process and store it
|
122 |
|
|
into regcache. */
|
123 |
|
|
|
124 |
|
|
static void
|
125 |
|
|
fetch_fpregs (struct regcache *regcache)
|
126 |
|
|
{
|
127 |
|
|
int ret, regno, tid;
|
128 |
|
|
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
|
129 |
|
|
|
130 |
|
|
/* Get the thread id for the ptrace call. */
|
131 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
132 |
|
|
|
133 |
|
|
/* Read the floating point state. */
|
134 |
|
|
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
|
135 |
|
|
if (ret < 0)
|
136 |
|
|
{
|
137 |
|
|
warning (_("Unable to fetch the floating point registers."));
|
138 |
|
|
return;
|
139 |
|
|
}
|
140 |
|
|
|
141 |
|
|
/* Fetch fpsr. */
|
142 |
|
|
regcache_raw_supply (regcache, ARM_FPS_REGNUM,
|
143 |
|
|
fp + NWFPE_FPSR_OFFSET);
|
144 |
|
|
|
145 |
|
|
/* Fetch the floating point registers. */
|
146 |
|
|
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
|
147 |
|
|
supply_nwfpe_register (regcache, regno, fp);
|
148 |
|
|
}
|
149 |
|
|
|
150 |
|
|
/* Save a particular register into the floating point state of the
|
151 |
|
|
process using the contents from regcache. */
|
152 |
|
|
|
153 |
|
|
static void
|
154 |
|
|
store_fpregister (const struct regcache *regcache, int regno)
|
155 |
|
|
{
|
156 |
|
|
int ret, tid;
|
157 |
|
|
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
|
158 |
|
|
|
159 |
|
|
/* Get the thread id for the ptrace call. */
|
160 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
161 |
|
|
|
162 |
|
|
/* Read the floating point state. */
|
163 |
|
|
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
|
164 |
|
|
if (ret < 0)
|
165 |
|
|
{
|
166 |
|
|
warning (_("Unable to fetch the floating point registers."));
|
167 |
|
|
return;
|
168 |
|
|
}
|
169 |
|
|
|
170 |
|
|
/* Store fpsr. */
|
171 |
|
|
if (ARM_FPS_REGNUM == regno && regcache_valid_p (regcache, ARM_FPS_REGNUM))
|
172 |
|
|
regcache_raw_collect (regcache, ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
|
173 |
|
|
|
174 |
|
|
/* Store the floating point register. */
|
175 |
|
|
if (regno >= ARM_F0_REGNUM && regno <= ARM_F7_REGNUM)
|
176 |
|
|
collect_nwfpe_register (regcache, regno, fp);
|
177 |
|
|
|
178 |
|
|
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
|
179 |
|
|
if (ret < 0)
|
180 |
|
|
{
|
181 |
|
|
warning (_("Unable to store floating point register."));
|
182 |
|
|
return;
|
183 |
|
|
}
|
184 |
|
|
}
|
185 |
|
|
|
186 |
|
|
/* Save the whole floating point state of the process using
|
187 |
|
|
the contents from regcache. */
|
188 |
|
|
|
189 |
|
|
static void
|
190 |
|
|
store_fpregs (const struct regcache *regcache)
|
191 |
|
|
{
|
192 |
|
|
int ret, regno, tid;
|
193 |
|
|
gdb_byte fp[ARM_LINUX_SIZEOF_NWFPE];
|
194 |
|
|
|
195 |
|
|
/* Get the thread id for the ptrace call. */
|
196 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
197 |
|
|
|
198 |
|
|
/* Read the floating point state. */
|
199 |
|
|
ret = ptrace (PT_GETFPREGS, tid, 0, fp);
|
200 |
|
|
if (ret < 0)
|
201 |
|
|
{
|
202 |
|
|
warning (_("Unable to fetch the floating point registers."));
|
203 |
|
|
return;
|
204 |
|
|
}
|
205 |
|
|
|
206 |
|
|
/* Store fpsr. */
|
207 |
|
|
if (regcache_valid_p (regcache, ARM_FPS_REGNUM))
|
208 |
|
|
regcache_raw_collect (regcache, ARM_FPS_REGNUM, fp + NWFPE_FPSR_OFFSET);
|
209 |
|
|
|
210 |
|
|
/* Store the floating point registers. */
|
211 |
|
|
for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
|
212 |
|
|
if (regcache_valid_p (regcache, regno))
|
213 |
|
|
collect_nwfpe_register (regcache, regno, fp);
|
214 |
|
|
|
215 |
|
|
ret = ptrace (PTRACE_SETFPREGS, tid, 0, fp);
|
216 |
|
|
if (ret < 0)
|
217 |
|
|
{
|
218 |
|
|
warning (_("Unable to store floating point registers."));
|
219 |
|
|
return;
|
220 |
|
|
}
|
221 |
|
|
}
|
222 |
|
|
|
223 |
|
|
/* Fetch a general register of the process and store into
|
224 |
|
|
regcache. */
|
225 |
|
|
|
226 |
|
|
static void
|
227 |
|
|
fetch_register (struct regcache *regcache, int regno)
|
228 |
|
|
{
|
229 |
|
|
int ret, tid;
|
230 |
|
|
elf_gregset_t regs;
|
231 |
|
|
|
232 |
|
|
/* Get the thread id for the ptrace call. */
|
233 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
234 |
|
|
|
235 |
|
|
ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
|
236 |
|
|
if (ret < 0)
|
237 |
|
|
{
|
238 |
|
|
warning (_("Unable to fetch general register."));
|
239 |
|
|
return;
|
240 |
|
|
}
|
241 |
|
|
|
242 |
|
|
if (regno >= ARM_A1_REGNUM && regno < ARM_PC_REGNUM)
|
243 |
|
|
regcache_raw_supply (regcache, regno, (char *) ®s[regno]);
|
244 |
|
|
|
245 |
|
|
if (ARM_PS_REGNUM == regno)
|
246 |
|
|
{
|
247 |
|
|
if (arm_apcs_32)
|
248 |
|
|
regcache_raw_supply (regcache, ARM_PS_REGNUM,
|
249 |
|
|
(char *) ®s[ARM_CPSR_GREGNUM]);
|
250 |
|
|
else
|
251 |
|
|
regcache_raw_supply (regcache, ARM_PS_REGNUM,
|
252 |
|
|
(char *) ®s[ARM_PC_REGNUM]);
|
253 |
|
|
}
|
254 |
|
|
|
255 |
|
|
if (ARM_PC_REGNUM == regno)
|
256 |
|
|
{
|
257 |
|
|
regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
|
258 |
|
|
(get_regcache_arch (regcache),
|
259 |
|
|
regs[ARM_PC_REGNUM]);
|
260 |
|
|
regcache_raw_supply (regcache, ARM_PC_REGNUM,
|
261 |
|
|
(char *) ®s[ARM_PC_REGNUM]);
|
262 |
|
|
}
|
263 |
|
|
}
|
264 |
|
|
|
265 |
|
|
/* Fetch all general registers of the process and store into
|
266 |
|
|
regcache. */
|
267 |
|
|
|
268 |
|
|
static void
|
269 |
|
|
fetch_regs (struct regcache *regcache)
|
270 |
|
|
{
|
271 |
|
|
int ret, regno, tid;
|
272 |
|
|
elf_gregset_t regs;
|
273 |
|
|
|
274 |
|
|
/* Get the thread id for the ptrace call. */
|
275 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
276 |
|
|
|
277 |
|
|
ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
|
278 |
|
|
if (ret < 0)
|
279 |
|
|
{
|
280 |
|
|
warning (_("Unable to fetch general registers."));
|
281 |
|
|
return;
|
282 |
|
|
}
|
283 |
|
|
|
284 |
|
|
for (regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
|
285 |
|
|
regcache_raw_supply (regcache, regno, (char *) ®s[regno]);
|
286 |
|
|
|
287 |
|
|
if (arm_apcs_32)
|
288 |
|
|
regcache_raw_supply (regcache, ARM_PS_REGNUM,
|
289 |
|
|
(char *) ®s[ARM_CPSR_GREGNUM]);
|
290 |
|
|
else
|
291 |
|
|
regcache_raw_supply (regcache, ARM_PS_REGNUM,
|
292 |
|
|
(char *) ®s[ARM_PC_REGNUM]);
|
293 |
|
|
|
294 |
|
|
regs[ARM_PC_REGNUM] = gdbarch_addr_bits_remove
|
295 |
|
|
(get_regcache_arch (regcache), regs[ARM_PC_REGNUM]);
|
296 |
|
|
regcache_raw_supply (regcache, ARM_PC_REGNUM,
|
297 |
|
|
(char *) ®s[ARM_PC_REGNUM]);
|
298 |
|
|
}
|
299 |
|
|
|
300 |
|
|
/* Store all general registers of the process from the values in
|
301 |
|
|
regcache. */
|
302 |
|
|
|
303 |
|
|
static void
|
304 |
|
|
store_register (const struct regcache *regcache, int regno)
|
305 |
|
|
{
|
306 |
|
|
int ret, tid;
|
307 |
|
|
elf_gregset_t regs;
|
308 |
|
|
|
309 |
|
|
if (!regcache_valid_p (regcache, regno))
|
310 |
|
|
return;
|
311 |
|
|
|
312 |
|
|
/* Get the thread id for the ptrace call. */
|
313 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
314 |
|
|
|
315 |
|
|
/* Get the general registers from the process. */
|
316 |
|
|
ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
|
317 |
|
|
if (ret < 0)
|
318 |
|
|
{
|
319 |
|
|
warning (_("Unable to fetch general registers."));
|
320 |
|
|
return;
|
321 |
|
|
}
|
322 |
|
|
|
323 |
|
|
if (regno >= ARM_A1_REGNUM && regno <= ARM_PC_REGNUM)
|
324 |
|
|
regcache_raw_collect (regcache, regno, (char *) ®s[regno]);
|
325 |
|
|
else if (arm_apcs_32 && regno == ARM_PS_REGNUM)
|
326 |
|
|
regcache_raw_collect (regcache, regno,
|
327 |
|
|
(char *) ®s[ARM_CPSR_GREGNUM]);
|
328 |
|
|
else if (!arm_apcs_32 && regno == ARM_PS_REGNUM)
|
329 |
|
|
regcache_raw_collect (regcache, ARM_PC_REGNUM,
|
330 |
|
|
(char *) ®s[ARM_PC_REGNUM]);
|
331 |
|
|
|
332 |
|
|
ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
|
333 |
|
|
if (ret < 0)
|
334 |
|
|
{
|
335 |
|
|
warning (_("Unable to store general register."));
|
336 |
|
|
return;
|
337 |
|
|
}
|
338 |
|
|
}
|
339 |
|
|
|
340 |
|
|
static void
|
341 |
|
|
store_regs (const struct regcache *regcache)
|
342 |
|
|
{
|
343 |
|
|
int ret, regno, tid;
|
344 |
|
|
elf_gregset_t regs;
|
345 |
|
|
|
346 |
|
|
/* Get the thread id for the ptrace call. */
|
347 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
348 |
|
|
|
349 |
|
|
/* Fetch the general registers. */
|
350 |
|
|
ret = ptrace (PTRACE_GETREGS, tid, 0, ®s);
|
351 |
|
|
if (ret < 0)
|
352 |
|
|
{
|
353 |
|
|
warning (_("Unable to fetch general registers."));
|
354 |
|
|
return;
|
355 |
|
|
}
|
356 |
|
|
|
357 |
|
|
for (regno = ARM_A1_REGNUM; regno <= ARM_PC_REGNUM; regno++)
|
358 |
|
|
{
|
359 |
|
|
if (regcache_valid_p (regcache, regno))
|
360 |
|
|
regcache_raw_collect (regcache, regno, (char *) ®s[regno]);
|
361 |
|
|
}
|
362 |
|
|
|
363 |
|
|
if (arm_apcs_32 && regcache_valid_p (regcache, ARM_PS_REGNUM))
|
364 |
|
|
regcache_raw_collect (regcache, ARM_PS_REGNUM,
|
365 |
|
|
(char *) ®s[ARM_CPSR_GREGNUM]);
|
366 |
|
|
|
367 |
|
|
ret = ptrace (PTRACE_SETREGS, tid, 0, ®s);
|
368 |
|
|
|
369 |
|
|
if (ret < 0)
|
370 |
|
|
{
|
371 |
|
|
warning (_("Unable to store general registers."));
|
372 |
|
|
return;
|
373 |
|
|
}
|
374 |
|
|
}
|
375 |
|
|
|
376 |
|
|
/* Fetch all WMMX registers of the process and store into
|
377 |
|
|
regcache. */
|
378 |
|
|
|
379 |
|
|
#define IWMMXT_REGS_SIZE (16 * 8 + 6 * 4)
|
380 |
|
|
|
381 |
|
|
static void
|
382 |
|
|
fetch_wmmx_regs (struct regcache *regcache)
|
383 |
|
|
{
|
384 |
|
|
char regbuf[IWMMXT_REGS_SIZE];
|
385 |
|
|
int ret, regno, tid;
|
386 |
|
|
|
387 |
|
|
/* Get the thread id for the ptrace call. */
|
388 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
389 |
|
|
|
390 |
|
|
ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
|
391 |
|
|
if (ret < 0)
|
392 |
|
|
{
|
393 |
|
|
warning (_("Unable to fetch WMMX registers."));
|
394 |
|
|
return;
|
395 |
|
|
}
|
396 |
|
|
|
397 |
|
|
for (regno = 0; regno < 16; regno++)
|
398 |
|
|
regcache_raw_supply (regcache, regno + ARM_WR0_REGNUM,
|
399 |
|
|
®buf[regno * 8]);
|
400 |
|
|
|
401 |
|
|
for (regno = 0; regno < 2; regno++)
|
402 |
|
|
regcache_raw_supply (regcache, regno + ARM_WCSSF_REGNUM,
|
403 |
|
|
®buf[16 * 8 + regno * 4]);
|
404 |
|
|
|
405 |
|
|
for (regno = 0; regno < 4; regno++)
|
406 |
|
|
regcache_raw_supply (regcache, regno + ARM_WCGR0_REGNUM,
|
407 |
|
|
®buf[16 * 8 + 2 * 4 + regno * 4]);
|
408 |
|
|
}
|
409 |
|
|
|
410 |
|
|
static void
|
411 |
|
|
store_wmmx_regs (const struct regcache *regcache)
|
412 |
|
|
{
|
413 |
|
|
char regbuf[IWMMXT_REGS_SIZE];
|
414 |
|
|
int ret, regno, tid;
|
415 |
|
|
|
416 |
|
|
/* Get the thread id for the ptrace call. */
|
417 |
|
|
tid = GET_THREAD_ID (inferior_ptid);
|
418 |
|
|
|
419 |
|
|
ret = ptrace (PTRACE_GETWMMXREGS, tid, 0, regbuf);
|
420 |
|
|
if (ret < 0)
|
421 |
|
|
{
|
422 |
|
|
warning (_("Unable to fetch WMMX registers."));
|
423 |
|
|
return;
|
424 |
|
|
}
|
425 |
|
|
|
426 |
|
|
for (regno = 0; regno < 16; regno++)
|
427 |
|
|
if (regcache_valid_p (regcache, regno + ARM_WR0_REGNUM))
|
428 |
|
|
regcache_raw_collect (regcache, regno + ARM_WR0_REGNUM,
|
429 |
|
|
®buf[regno * 8]);
|
430 |
|
|
|
431 |
|
|
for (regno = 0; regno < 2; regno++)
|
432 |
|
|
if (regcache_valid_p (regcache, regno + ARM_WCSSF_REGNUM))
|
433 |
|
|
regcache_raw_collect (regcache, regno + ARM_WCSSF_REGNUM,
|
434 |
|
|
®buf[16 * 8 + regno * 4]);
|
435 |
|
|
|
436 |
|
|
for (regno = 0; regno < 4; regno++)
|
437 |
|
|
if (regcache_valid_p (regcache, regno + ARM_WCGR0_REGNUM))
|
438 |
|
|
regcache_raw_collect (regcache, regno + ARM_WCGR0_REGNUM,
|
439 |
|
|
®buf[16 * 8 + 2 * 4 + regno * 4]);
|
440 |
|
|
|
441 |
|
|
ret = ptrace (PTRACE_SETWMMXREGS, tid, 0, regbuf);
|
442 |
|
|
|
443 |
|
|
if (ret < 0)
|
444 |
|
|
{
|
445 |
|
|
warning (_("Unable to store WMMX registers."));
|
446 |
|
|
return;
|
447 |
|
|
}
|
448 |
|
|
}
|
449 |
|
|
|
450 |
|
|
/* Fetch registers from the child process. Fetch all registers if
|
451 |
|
|
regno == -1, otherwise fetch all general registers or all floating
|
452 |
|
|
point registers depending upon the value of regno. */
|
453 |
|
|
|
454 |
|
|
static void
|
455 |
|
|
arm_linux_fetch_inferior_registers (struct target_ops *ops,
|
456 |
|
|
struct regcache *regcache, int regno)
|
457 |
|
|
{
|
458 |
|
|
if (-1 == regno)
|
459 |
|
|
{
|
460 |
|
|
fetch_regs (regcache);
|
461 |
|
|
fetch_fpregs (regcache);
|
462 |
|
|
if (arm_linux_has_wmmx_registers)
|
463 |
|
|
fetch_wmmx_regs (regcache);
|
464 |
|
|
}
|
465 |
|
|
else
|
466 |
|
|
{
|
467 |
|
|
if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
|
468 |
|
|
fetch_register (regcache, regno);
|
469 |
|
|
else if (regno >= ARM_F0_REGNUM && regno <= ARM_FPS_REGNUM)
|
470 |
|
|
fetch_fpregister (regcache, regno);
|
471 |
|
|
else if (arm_linux_has_wmmx_registers
|
472 |
|
|
&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
|
473 |
|
|
fetch_wmmx_regs (regcache);
|
474 |
|
|
}
|
475 |
|
|
}
|
476 |
|
|
|
477 |
|
|
/* Store registers back into the inferior. Store all registers if
|
478 |
|
|
regno == -1, otherwise store all general registers or all floating
|
479 |
|
|
point registers depending upon the value of regno. */
|
480 |
|
|
|
481 |
|
|
static void
|
482 |
|
|
arm_linux_store_inferior_registers (struct target_ops *ops,
|
483 |
|
|
struct regcache *regcache, int regno)
|
484 |
|
|
{
|
485 |
|
|
if (-1 == regno)
|
486 |
|
|
{
|
487 |
|
|
store_regs (regcache);
|
488 |
|
|
store_fpregs (regcache);
|
489 |
|
|
if (arm_linux_has_wmmx_registers)
|
490 |
|
|
store_wmmx_regs (regcache);
|
491 |
|
|
}
|
492 |
|
|
else
|
493 |
|
|
{
|
494 |
|
|
if (regno < ARM_F0_REGNUM || regno == ARM_PS_REGNUM)
|
495 |
|
|
store_register (regcache, regno);
|
496 |
|
|
else if ((regno >= ARM_F0_REGNUM) && (regno <= ARM_FPS_REGNUM))
|
497 |
|
|
store_fpregister (regcache, regno);
|
498 |
|
|
else if (arm_linux_has_wmmx_registers
|
499 |
|
|
&& regno >= ARM_WR0_REGNUM && regno <= ARM_WCGR7_REGNUM)
|
500 |
|
|
store_wmmx_regs (regcache);
|
501 |
|
|
}
|
502 |
|
|
}
|
503 |
|
|
|
504 |
|
|
/* Wrapper functions for the standard regset handling, used by
|
505 |
|
|
thread debugging. */
|
506 |
|
|
|
507 |
|
|
void
|
508 |
|
|
fill_gregset (const struct regcache *regcache,
|
509 |
|
|
gdb_gregset_t *gregsetp, int regno)
|
510 |
|
|
{
|
511 |
|
|
arm_linux_collect_gregset (NULL, regcache, regno, gregsetp, 0);
|
512 |
|
|
}
|
513 |
|
|
|
514 |
|
|
void
|
515 |
|
|
supply_gregset (struct regcache *regcache, const gdb_gregset_t *gregsetp)
|
516 |
|
|
{
|
517 |
|
|
arm_linux_supply_gregset (NULL, regcache, -1, gregsetp, 0);
|
518 |
|
|
}
|
519 |
|
|
|
520 |
|
|
void
|
521 |
|
|
fill_fpregset (const struct regcache *regcache,
|
522 |
|
|
gdb_fpregset_t *fpregsetp, int regno)
|
523 |
|
|
{
|
524 |
|
|
arm_linux_collect_nwfpe (NULL, regcache, regno, fpregsetp, 0);
|
525 |
|
|
}
|
526 |
|
|
|
527 |
|
|
/* Fill GDB's register array with the floating-point register values
|
528 |
|
|
in *fpregsetp. */
|
529 |
|
|
|
530 |
|
|
void
|
531 |
|
|
supply_fpregset (struct regcache *regcache, const gdb_fpregset_t *fpregsetp)
|
532 |
|
|
{
|
533 |
|
|
arm_linux_supply_nwfpe (NULL, regcache, -1, fpregsetp, 0);
|
534 |
|
|
}
|
535 |
|
|
|
536 |
|
|
/* Fetch the thread-local storage pointer for libthread_db. */
|
537 |
|
|
|
538 |
|
|
ps_err_e
|
539 |
|
|
ps_get_thread_area (const struct ps_prochandle *ph,
|
540 |
|
|
lwpid_t lwpid, int idx, void **base)
|
541 |
|
|
{
|
542 |
|
|
if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
|
543 |
|
|
return PS_ERR;
|
544 |
|
|
|
545 |
|
|
/* IDX is the bias from the thread pointer to the beginning of the
|
546 |
|
|
thread descriptor. It has to be subtracted due to implementation
|
547 |
|
|
quirks in libthread_db. */
|
548 |
|
|
*base = (void *) ((char *)*base - idx);
|
549 |
|
|
|
550 |
|
|
return PS_OK;
|
551 |
|
|
}
|
552 |
|
|
|
553 |
|
|
static unsigned int
|
554 |
|
|
get_linux_version (unsigned int *vmajor,
|
555 |
|
|
unsigned int *vminor,
|
556 |
|
|
unsigned int *vrelease)
|
557 |
|
|
{
|
558 |
|
|
struct utsname info;
|
559 |
|
|
char *pmajor, *pminor, *prelease, *tail;
|
560 |
|
|
|
561 |
|
|
if (-1 == uname (&info))
|
562 |
|
|
{
|
563 |
|
|
warning (_("Unable to determine GNU/Linux version."));
|
564 |
|
|
return -1;
|
565 |
|
|
}
|
566 |
|
|
|
567 |
|
|
pmajor = strtok (info.release, ".");
|
568 |
|
|
pminor = strtok (NULL, ".");
|
569 |
|
|
prelease = strtok (NULL, ".");
|
570 |
|
|
|
571 |
|
|
*vmajor = (unsigned int) strtoul (pmajor, &tail, 0);
|
572 |
|
|
*vminor = (unsigned int) strtoul (pminor, &tail, 0);
|
573 |
|
|
*vrelease = (unsigned int) strtoul (prelease, &tail, 0);
|
574 |
|
|
|
575 |
|
|
return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
|
576 |
|
|
}
|
577 |
|
|
|
578 |
|
|
static const struct target_desc *
|
579 |
|
|
arm_linux_read_description (struct target_ops *ops)
|
580 |
|
|
{
|
581 |
|
|
int ret;
|
582 |
|
|
char regbuf[IWMMXT_REGS_SIZE];
|
583 |
|
|
|
584 |
|
|
ret = ptrace (PTRACE_GETWMMXREGS, GET_THREAD_ID (inferior_ptid),
|
585 |
|
|
0, regbuf);
|
586 |
|
|
if (ret < 0)
|
587 |
|
|
arm_linux_has_wmmx_registers = 0;
|
588 |
|
|
else
|
589 |
|
|
arm_linux_has_wmmx_registers = 1;
|
590 |
|
|
|
591 |
|
|
if (arm_linux_has_wmmx_registers)
|
592 |
|
|
return tdesc_arm_with_iwmmxt;
|
593 |
|
|
else
|
594 |
|
|
return NULL;
|
595 |
|
|
}
|
596 |
|
|
|
597 |
|
|
void _initialize_arm_linux_nat (void);
|
598 |
|
|
|
599 |
|
|
void
|
600 |
|
|
_initialize_arm_linux_nat (void)
|
601 |
|
|
{
|
602 |
|
|
struct target_ops *t;
|
603 |
|
|
|
604 |
|
|
os_version = get_linux_version (&os_major, &os_minor, &os_release);
|
605 |
|
|
|
606 |
|
|
/* Fill in the generic GNU/Linux methods. */
|
607 |
|
|
t = linux_target ();
|
608 |
|
|
|
609 |
|
|
/* Add our register access methods. */
|
610 |
|
|
t->to_fetch_registers = arm_linux_fetch_inferior_registers;
|
611 |
|
|
t->to_store_registers = arm_linux_store_inferior_registers;
|
612 |
|
|
|
613 |
|
|
t->to_read_description = arm_linux_read_description;
|
614 |
|
|
|
615 |
|
|
/* Register the target. */
|
616 |
|
|
linux_nat_add_target (t);
|
617 |
|
|
|
618 |
|
|
/* Initialize the standard target descriptions. */
|
619 |
|
|
initialize_tdesc_arm_with_iwmmxt ();
|
620 |
|
|
}
|