Commit | Line | Data |
---|---|---|
a4b6fc86 AC |
1 | /* Motorola m68k native support for GNU/Linux. |
2 | ||
0b302171 | 3 | Copyright (C) 1996, 1998, 2000-2012 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
19 | |
20 | #include "defs.h" | |
21 | #include "frame.h" | |
22 | #include "inferior.h" | |
23 | #include "language.h" | |
24 | #include "gdbcore.h" | |
32eeb91a | 25 | #include "gdb_string.h" |
4e052eda | 26 | #include "regcache.h" |
10d6c8cd DJ |
27 | #include "target.h" |
28 | #include "linux-nat.h" | |
c906108c | 29 | |
32eeb91a AS |
30 | #include "m68k-tdep.h" |
31 | ||
c906108c SS |
32 | #include <sys/param.h> |
33 | #include <sys/dir.h> | |
34 | #include <signal.h> | |
0280a90a | 35 | #include <sys/ptrace.h> |
c906108c SS |
36 | #include <sys/user.h> |
37 | #include <sys/ioctl.h> | |
38 | #include <fcntl.h> | |
39 | #include <sys/procfs.h> | |
40 | ||
0280a90a AS |
41 | #ifdef HAVE_SYS_REG_H |
42 | #include <sys/reg.h> | |
43 | #endif | |
44 | ||
c906108c SS |
45 | #include <sys/file.h> |
46 | #include "gdb_stat.h" | |
47 | ||
48 | #include "floatformat.h" | |
49 | ||
50 | #include "target.h" | |
3e00823e | 51 | |
025bb325 | 52 | /* Prototypes for supply_gregset etc. */ |
3e00823e | 53 | #include "gregset.h" |
7b8b6d6d AS |
54 | |
55 | /* Defines ps_err_e, struct ps_prochandle. */ | |
56 | #include "gdb_proc_service.h" | |
57 | ||
58 | #ifndef PTRACE_GET_THREAD_AREA | |
59 | #define PTRACE_GET_THREAD_AREA 25 | |
60 | #endif | |
c906108c | 61 | \f |
c9f4d572 | 62 | /* This table must line up with gdbarch_register_name in "m68k-tdep.c". */ |
c5aa993b | 63 | static const int regmap[] = |
c906108c SS |
64 | { |
65 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, | |
66 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, | |
67 | PT_SR, PT_PC, | |
68 | /* PT_FP0, ..., PT_FP7 */ | |
69 | 21, 24, 27, 30, 33, 36, 39, 42, | |
70 | /* PT_FPCR, PT_FPSR, PT_FPIAR */ | |
71 | 45, 46, 47 | |
72 | }; | |
73 | ||
0280a90a AS |
74 | /* Which ptrace request retrieves which registers? |
75 | These apply to the corresponding SET requests as well. */ | |
76 | #define NUM_GREGS (18) | |
77 | #define MAX_NUM_REGS (NUM_GREGS + 11) | |
78 | ||
0c13fc49 | 79 | static int |
0280a90a AS |
80 | getregs_supplies (int regno) |
81 | { | |
82 | return 0 <= regno && regno < NUM_GREGS; | |
83 | } | |
84 | ||
0c13fc49 | 85 | static int |
0280a90a AS |
86 | getfpregs_supplies (int regno) |
87 | { | |
4ed226fe | 88 | return M68K_FP0_REGNUM <= regno && regno <= M68K_FPI_REGNUM; |
0280a90a AS |
89 | } |
90 | ||
91 | /* Does the current host support the GETREGS request? */ | |
0c13fc49 | 92 | static int have_ptrace_getregs = |
0280a90a AS |
93 | #ifdef HAVE_PTRACE_GETREGS |
94 | 1 | |
95 | #else | |
96 | 0 | |
97 | #endif | |
98 | ; | |
99 | ||
100 | \f | |
101 | ||
0280a90a AS |
102 | /* Fetching registers directly from the U area, one at a time. */ |
103 | ||
0280a90a AS |
104 | /* Fetch one register. */ |
105 | ||
106 | static void | |
56be3814 | 107 | fetch_register (struct regcache *regcache, int regno) |
0280a90a | 108 | { |
c984b7ff | 109 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
335d71d6 | 110 | long regaddr; |
52f0bd74 | 111 | int i; |
123a958e | 112 | char buf[MAX_REGISTER_SIZE]; |
0280a90a AS |
113 | int tid; |
114 | ||
025bb325 | 115 | /* Overload thread id onto process id. */ |
8de307e0 AS |
116 | tid = TIDGET (inferior_ptid); |
117 | if (tid == 0) | |
025bb325 MS |
118 | tid = PIDGET (inferior_ptid); /* no thread id, just use |
119 | process id. */ | |
0280a90a | 120 | |
de732108 | 121 | regaddr = 4 * regmap[regno]; |
335d71d6 | 122 | for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long)) |
0280a90a AS |
123 | { |
124 | errno = 0; | |
335d71d6 AS |
125 | *(long *) &buf[i] = ptrace (PTRACE_PEEKUSER, tid, regaddr, 0); |
126 | regaddr += sizeof (long); | |
0280a90a | 127 | if (errno != 0) |
335d71d6 AS |
128 | error (_("Couldn't read register %s (#%d): %s."), |
129 | gdbarch_register_name (gdbarch, regno), | |
130 | regno, safe_strerror (errno)); | |
0280a90a | 131 | } |
56be3814 | 132 | regcache_raw_supply (regcache, regno, buf); |
0280a90a AS |
133 | } |
134 | ||
135 | /* Fetch register values from the inferior. | |
136 | If REGNO is negative, do this for all registers. | |
025bb325 | 137 | Otherwise, REGNO specifies which register (so we can save time). */ |
c906108c | 138 | |
10d6c8cd | 139 | static void |
56be3814 | 140 | old_fetch_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
141 | { |
142 | if (regno >= 0) | |
143 | { | |
56be3814 | 144 | fetch_register (regcache, regno); |
0280a90a AS |
145 | } |
146 | else | |
147 | { | |
c984b7ff UW |
148 | for (regno = 0; |
149 | regno < gdbarch_num_regs (get_regcache_arch (regcache)); | |
150 | regno++) | |
0280a90a | 151 | { |
56be3814 | 152 | fetch_register (regcache, regno); |
0280a90a AS |
153 | } |
154 | } | |
155 | } | |
156 | ||
025bb325 | 157 | /* Store one register. */ |
0280a90a AS |
158 | |
159 | static void | |
56be3814 | 160 | store_register (const struct regcache *regcache, int regno) |
0280a90a | 161 | { |
f36bf22c | 162 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
335d71d6 | 163 | long regaddr; |
52f0bd74 | 164 | int i; |
0280a90a | 165 | int tid; |
d9d9c31f | 166 | char buf[MAX_REGISTER_SIZE]; |
0280a90a | 167 | |
025bb325 | 168 | /* Overload thread id onto process id. */ |
8de307e0 AS |
169 | tid = TIDGET (inferior_ptid); |
170 | if (tid == 0) | |
025bb325 MS |
171 | tid = PIDGET (inferior_ptid); /* no thread id, just use |
172 | process id. */ | |
0280a90a | 173 | |
de732108 | 174 | regaddr = 4 * regmap[regno]; |
9852326a | 175 | |
025bb325 | 176 | /* Put the contents of regno into a local buffer. */ |
56be3814 | 177 | regcache_raw_collect (regcache, regno, buf); |
9852326a | 178 | |
025bb325 | 179 | /* Store the local buffer into the inferior a chunk at the time. */ |
335d71d6 | 180 | for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long)) |
0280a90a AS |
181 | { |
182 | errno = 0; | |
335d71d6 AS |
183 | ptrace (PTRACE_POKEUSER, tid, regaddr, *(long *) &buf[i]); |
184 | regaddr += sizeof (long); | |
0280a90a | 185 | if (errno != 0) |
335d71d6 AS |
186 | error (_("Couldn't write register %s (#%d): %s."), |
187 | gdbarch_register_name (gdbarch, regno), | |
188 | regno, safe_strerror (errno)); | |
0280a90a AS |
189 | } |
190 | } | |
191 | ||
192 | /* Store our register values back into the inferior. | |
193 | If REGNO is negative, do this for all registers. | |
194 | Otherwise, REGNO specifies which register (so we can save time). */ | |
195 | ||
10d6c8cd | 196 | static void |
56be3814 | 197 | old_store_inferior_registers (const struct regcache *regcache, int regno) |
0280a90a AS |
198 | { |
199 | if (regno >= 0) | |
200 | { | |
56be3814 | 201 | store_register (regcache, regno); |
0280a90a AS |
202 | } |
203 | else | |
204 | { | |
c984b7ff UW |
205 | for (regno = 0; |
206 | regno < gdbarch_num_regs (get_regcache_arch (regcache)); | |
207 | regno++) | |
0280a90a | 208 | { |
56be3814 | 209 | store_register (regcache, regno); |
0280a90a AS |
210 | } |
211 | } | |
212 | } | |
213 | \f | |
f175af98 DJ |
214 | /* Given a pointer to a general register set in /proc format |
215 | (elf_gregset_t *), unpack the register contents and supply | |
025bb325 | 216 | them as gdb's idea of the current register values. */ |
c906108c | 217 | |
c906108c | 218 | void |
7f7fe91e | 219 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
c906108c | 220 | { |
c984b7ff | 221 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7f7fe91e | 222 | const elf_greg_t *regp = (const elf_greg_t *) gregsetp; |
c906108c SS |
223 | int regi; |
224 | ||
3e8c568d | 225 | for (regi = M68K_D0_REGNUM; |
c984b7ff | 226 | regi <= gdbarch_sp_regnum (gdbarch); |
3e8c568d | 227 | regi++) |
7f7fe91e | 228 | regcache_raw_supply (regcache, regi, ®p[regmap[regi]]); |
c984b7ff | 229 | regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), |
3e8c568d UW |
230 | ®p[PT_SR]); |
231 | regcache_raw_supply (regcache, | |
c984b7ff | 232 | gdbarch_pc_regnum (gdbarch), ®p[PT_PC]); |
0280a90a AS |
233 | } |
234 | ||
235 | /* Fill register REGNO (if it is a general-purpose register) in | |
236 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, | |
237 | do this for all registers. */ | |
238 | void | |
7f7fe91e UW |
239 | fill_gregset (const struct regcache *regcache, |
240 | elf_gregset_t *gregsetp, int regno) | |
0280a90a AS |
241 | { |
242 | elf_greg_t *regp = (elf_greg_t *) gregsetp; | |
243 | int i; | |
244 | ||
245 | for (i = 0; i < NUM_GREGS; i++) | |
8de307e0 | 246 | if (regno == -1 || regno == i) |
7f7fe91e | 247 | regcache_raw_collect (regcache, i, regp + regmap[i]); |
0280a90a AS |
248 | } |
249 | ||
250 | #ifdef HAVE_PTRACE_GETREGS | |
251 | ||
252 | /* Fetch all general-purpose registers from process/thread TID and | |
253 | store their values in GDB's register array. */ | |
254 | ||
255 | static void | |
56be3814 | 256 | fetch_regs (struct regcache *regcache, int tid) |
0280a90a AS |
257 | { |
258 | elf_gregset_t regs; | |
259 | ||
260 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
261 | { | |
262 | if (errno == EIO) | |
263 | { | |
264 | /* The kernel we're running on doesn't support the GETREGS | |
265 | request. Reset `have_ptrace_getregs'. */ | |
266 | have_ptrace_getregs = 0; | |
267 | return; | |
268 | } | |
269 | ||
e2e0b3e5 | 270 | perror_with_name (_("Couldn't get registers")); |
0280a90a AS |
271 | } |
272 | ||
56be3814 | 273 | supply_gregset (regcache, (const elf_gregset_t *) ®s); |
c906108c SS |
274 | } |
275 | ||
0280a90a AS |
276 | /* Store all valid general-purpose registers in GDB's register array |
277 | into the process/thread specified by TID. */ | |
278 | ||
279 | static void | |
56be3814 | 280 | store_regs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
281 | { |
282 | elf_gregset_t regs; | |
283 | ||
284 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 285 | perror_with_name (_("Couldn't get registers")); |
0280a90a | 286 | |
56be3814 | 287 | fill_gregset (regcache, ®s, regno); |
0280a90a AS |
288 | |
289 | if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 290 | perror_with_name (_("Couldn't write registers")); |
0280a90a AS |
291 | } |
292 | ||
293 | #else | |
294 | ||
025bb325 MS |
295 | static void fetch_regs (struct regcache *regcache, int tid) |
296 | { | |
297 | } | |
298 | ||
299 | static void store_regs (const struct regcache *regcache, int tid, int regno) | |
300 | { | |
301 | } | |
0280a90a AS |
302 | |
303 | #endif | |
304 | ||
305 | \f | |
306 | /* Transfering floating-point registers between GDB, inferiors and cores. */ | |
307 | ||
308 | /* What is the address of fpN within the floating-point register set F? */ | |
7f7fe91e | 309 | #define FPREG_ADDR(f, n) (&(f)->fpregs[(n) * 3]) |
0280a90a AS |
310 | |
311 | /* Fill GDB's register array with the floating-point register values in | |
312 | *FPREGSETP. */ | |
c906108c | 313 | |
c5aa993b | 314 | void |
7f7fe91e | 315 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
c906108c | 316 | { |
c984b7ff | 317 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c906108c SS |
318 | int regi; |
319 | ||
c984b7ff UW |
320 | for (regi = gdbarch_fp0_regnum (gdbarch); |
321 | regi < gdbarch_fp0_regnum (gdbarch) + 8; regi++) | |
7f7fe91e | 322 | regcache_raw_supply (regcache, regi, |
3e8c568d | 323 | FPREG_ADDR (fpregsetp, |
c984b7ff | 324 | regi - gdbarch_fp0_regnum (gdbarch))); |
7f7fe91e UW |
325 | regcache_raw_supply (regcache, M68K_FPC_REGNUM, &fpregsetp->fpcntl[0]); |
326 | regcache_raw_supply (regcache, M68K_FPS_REGNUM, &fpregsetp->fpcntl[1]); | |
327 | regcache_raw_supply (regcache, M68K_FPI_REGNUM, &fpregsetp->fpcntl[2]); | |
c906108c SS |
328 | } |
329 | ||
0280a90a AS |
330 | /* Fill register REGNO (if it is a floating-point register) in |
331 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, | |
332 | do this for all registers. */ | |
333 | ||
334 | void | |
7f7fe91e UW |
335 | fill_fpregset (const struct regcache *regcache, |
336 | elf_fpregset_t *fpregsetp, int regno) | |
0280a90a | 337 | { |
c984b7ff | 338 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
0280a90a AS |
339 | int i; |
340 | ||
341 | /* Fill in the floating-point registers. */ | |
c984b7ff UW |
342 | for (i = gdbarch_fp0_regnum (gdbarch); |
343 | i < gdbarch_fp0_regnum (gdbarch) + 8; i++) | |
0280a90a | 344 | if (regno == -1 || regno == i) |
7f7fe91e | 345 | regcache_raw_collect (regcache, i, |
3e8c568d | 346 | FPREG_ADDR (fpregsetp, |
c984b7ff | 347 | i - gdbarch_fp0_regnum (gdbarch))); |
0280a90a AS |
348 | |
349 | /* Fill in the floating-point control registers. */ | |
32eeb91a | 350 | for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++) |
0280a90a | 351 | if (regno == -1 || regno == i) |
7f7fe91e UW |
352 | regcache_raw_collect (regcache, i, |
353 | &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]); | |
0280a90a AS |
354 | } |
355 | ||
356 | #ifdef HAVE_PTRACE_GETREGS | |
357 | ||
358 | /* Fetch all floating-point registers from process/thread TID and store | |
359 | thier values in GDB's register array. */ | |
360 | ||
361 | static void | |
56be3814 | 362 | fetch_fpregs (struct regcache *regcache, int tid) |
0280a90a AS |
363 | { |
364 | elf_fpregset_t fpregs; | |
365 | ||
366 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 367 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 368 | |
56be3814 | 369 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs); |
0280a90a AS |
370 | } |
371 | ||
372 | /* Store all valid floating-point registers in GDB's register array | |
373 | into the process/thread specified by TID. */ | |
374 | ||
375 | static void | |
56be3814 | 376 | store_fpregs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
377 | { |
378 | elf_fpregset_t fpregs; | |
379 | ||
380 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 381 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 382 | |
56be3814 | 383 | fill_fpregset (regcache, &fpregs, regno); |
0280a90a AS |
384 | |
385 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 386 | perror_with_name (_("Couldn't write floating point status")); |
0280a90a AS |
387 | } |
388 | ||
389 | #else | |
390 | ||
025bb325 MS |
391 | static void fetch_fpregs (struct regcache *regcache, int tid) |
392 | { | |
393 | } | |
394 | ||
395 | static void store_fpregs (const struct regcache *regcache, int tid, int regno) | |
396 | { | |
397 | } | |
0280a90a | 398 | |
c906108c | 399 | #endif |
0280a90a AS |
400 | \f |
401 | /* Transferring arbitrary registers between GDB and inferior. */ | |
402 | ||
403 | /* Fetch register REGNO from the child process. If REGNO is -1, do | |
404 | this for all registers (including the floating point and SSE | |
405 | registers). */ | |
406 | ||
10d6c8cd | 407 | static void |
28439f5e PA |
408 | m68k_linux_fetch_inferior_registers (struct target_ops *ops, |
409 | struct regcache *regcache, int regno) | |
0280a90a AS |
410 | { |
411 | int tid; | |
412 | ||
413 | /* Use the old method of peeking around in `struct user' if the | |
414 | GETREGS request isn't available. */ | |
415 | if (! have_ptrace_getregs) | |
416 | { | |
56be3814 | 417 | old_fetch_inferior_registers (regcache, regno); |
0280a90a AS |
418 | return; |
419 | } | |
420 | ||
a4b6fc86 | 421 | /* GNU/Linux LWP ID's are process ID's. */ |
8de307e0 AS |
422 | tid = TIDGET (inferior_ptid); |
423 | if (tid == 0) | |
025bb325 | 424 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
f175af98 | 425 | |
0280a90a AS |
426 | /* Use the PTRACE_GETFPXREGS request whenever possible, since it |
427 | transfers more registers in one system call, and we'll cache the | |
428 | results. But remember that fetch_fpxregs can fail, and return | |
429 | zero. */ | |
430 | if (regno == -1) | |
431 | { | |
56be3814 | 432 | fetch_regs (regcache, tid); |
0280a90a AS |
433 | |
434 | /* The call above might reset `have_ptrace_getregs'. */ | |
435 | if (! have_ptrace_getregs) | |
436 | { | |
56be3814 | 437 | old_fetch_inferior_registers (regcache, -1); |
0280a90a AS |
438 | return; |
439 | } | |
440 | ||
56be3814 | 441 | fetch_fpregs (regcache, tid); |
0280a90a AS |
442 | return; |
443 | } | |
444 | ||
445 | if (getregs_supplies (regno)) | |
446 | { | |
56be3814 | 447 | fetch_regs (regcache, tid); |
0280a90a AS |
448 | return; |
449 | } | |
450 | ||
451 | if (getfpregs_supplies (regno)) | |
452 | { | |
56be3814 | 453 | fetch_fpregs (regcache, tid); |
0280a90a AS |
454 | return; |
455 | } | |
456 | ||
457 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 458 | _("Got request for bad register number %d."), regno); |
0280a90a AS |
459 | } |
460 | ||
461 | /* Store register REGNO back into the child process. If REGNO is -1, | |
462 | do this for all registers (including the floating point and SSE | |
463 | registers). */ | |
10d6c8cd | 464 | static void |
28439f5e PA |
465 | m68k_linux_store_inferior_registers (struct target_ops *ops, |
466 | struct regcache *regcache, int regno) | |
0280a90a AS |
467 | { |
468 | int tid; | |
469 | ||
470 | /* Use the old method of poking around in `struct user' if the | |
471 | SETREGS request isn't available. */ | |
472 | if (! have_ptrace_getregs) | |
473 | { | |
56be3814 | 474 | old_store_inferior_registers (regcache, regno); |
0280a90a AS |
475 | return; |
476 | } | |
477 | ||
a4b6fc86 | 478 | /* GNU/Linux LWP ID's are process ID's. */ |
8de307e0 AS |
479 | tid = TIDGET (inferior_ptid); |
480 | if (tid == 0) | |
0280a90a AS |
481 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
482 | ||
483 | /* Use the PTRACE_SETFPREGS requests whenever possible, since it | |
484 | transfers more registers in one system call. But remember that | |
485 | store_fpregs can fail, and return zero. */ | |
486 | if (regno == -1) | |
487 | { | |
56be3814 UW |
488 | store_regs (regcache, tid, regno); |
489 | store_fpregs (regcache, tid, regno); | |
0280a90a AS |
490 | return; |
491 | } | |
492 | ||
493 | if (getregs_supplies (regno)) | |
494 | { | |
56be3814 | 495 | store_regs (regcache, tid, regno); |
0280a90a AS |
496 | return; |
497 | } | |
498 | ||
499 | if (getfpregs_supplies (regno)) | |
500 | { | |
56be3814 | 501 | store_fpregs (regcache, tid, regno); |
0280a90a AS |
502 | return; |
503 | } | |
504 | ||
505 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 506 | _("Got request to store bad register number %d."), regno); |
0280a90a | 507 | } |
f175af98 DJ |
508 | \f |
509 | /* Interpreting register set info found in core files. */ | |
510 | ||
511 | /* Provide registers to GDB from a core file. | |
512 | ||
513 | (We can't use the generic version of this function in | |
514 | core-regset.c, because we need to use elf_gregset_t instead of | |
515 | gregset_t.) | |
516 | ||
517 | CORE_REG_SECT points to an array of bytes, which are the contents | |
518 | of a `note' from a core file which BFD thinks might contain | |
519 | register contents. CORE_REG_SIZE is its size. | |
520 | ||
521 | WHICH says which register set corelow suspects this is: | |
522 | 0 --- the general-purpose register set, in elf_gregset_t format | |
523 | 2 --- the floating-point register set, in elf_fpregset_t format | |
524 | ||
a4b6fc86 | 525 | REG_ADDR isn't used on GNU/Linux. */ |
f175af98 DJ |
526 | |
527 | static void | |
9eefc95f UW |
528 | fetch_core_registers (struct regcache *regcache, |
529 | char *core_reg_sect, unsigned core_reg_size, | |
f175af98 DJ |
530 | int which, CORE_ADDR reg_addr) |
531 | { | |
532 | elf_gregset_t gregset; | |
533 | elf_fpregset_t fpregset; | |
534 | ||
535 | switch (which) | |
536 | { | |
537 | case 0: | |
538 | if (core_reg_size != sizeof (gregset)) | |
8a3fe4f8 | 539 | warning (_("Wrong size gregset in core file.")); |
f175af98 DJ |
540 | else |
541 | { | |
542 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); | |
9eefc95f | 543 | supply_gregset (regcache, (const elf_gregset_t *) &gregset); |
f175af98 DJ |
544 | } |
545 | break; | |
546 | ||
547 | case 2: | |
548 | if (core_reg_size != sizeof (fpregset)) | |
8a3fe4f8 | 549 | warning (_("Wrong size fpregset in core file.")); |
f175af98 DJ |
550 | else |
551 | { | |
552 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); | |
9eefc95f | 553 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregset); |
f175af98 DJ |
554 | } |
555 | break; | |
556 | ||
557 | default: | |
558 | /* We've covered all the kinds of registers we know about here, | |
559 | so this must be something we wouldn't know what to do with | |
560 | anyway. Just ignore it. */ | |
561 | break; | |
562 | } | |
563 | } | |
c906108c | 564 | \f |
c5aa993b | 565 | |
7b8b6d6d AS |
566 | /* Fetch the thread-local storage pointer for libthread_db. */ |
567 | ||
568 | ps_err_e | |
569 | ps_get_thread_area (const struct ps_prochandle *ph, | |
570 | lwpid_t lwpid, int idx, void **base) | |
571 | { | |
572 | if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) < 0) | |
573 | return PS_ERR; | |
574 | ||
575 | /* IDX is the bias from the thread pointer to the beginning of the | |
576 | thread descriptor. It has to be subtracted due to implementation | |
577 | quirks in libthread_db. */ | |
578 | *base = (char *) *base - idx; | |
579 | ||
580 | return PS_OK; | |
581 | } | |
582 | \f | |
583 | ||
a4b6fc86 AC |
584 | /* Register that we are able to handle GNU/Linux ELF core file |
585 | formats. */ | |
f175af98 DJ |
586 | |
587 | static struct core_fns linux_elf_core_fns = | |
588 | { | |
589 | bfd_target_elf_flavour, /* core_flavour */ | |
590 | default_check_format, /* check_format */ | |
591 | default_core_sniffer, /* core_sniffer */ | |
592 | fetch_core_registers, /* core_read_registers */ | |
593 | NULL /* next */ | |
594 | }; | |
595 | ||
10d6c8cd DJ |
596 | void _initialize_m68k_linux_nat (void); |
597 | ||
f175af98 | 598 | void |
5ae5f592 | 599 | _initialize_m68k_linux_nat (void) |
f175af98 | 600 | { |
10d6c8cd DJ |
601 | struct target_ops *t; |
602 | ||
603 | /* Fill in the generic GNU/Linux methods. */ | |
604 | t = linux_target (); | |
605 | ||
606 | /* Add our register access methods. */ | |
607 | t->to_fetch_registers = m68k_linux_fetch_inferior_registers; | |
608 | t->to_store_registers = m68k_linux_store_inferior_registers; | |
609 | ||
610 | /* Register the target. */ | |
f973ed9c | 611 | linux_nat_add_target (t); |
10d6c8cd | 612 | |
00e32a35 | 613 | deprecated_add_core_fns (&linux_elf_core_fns); |
f175af98 | 614 | } |