Commit | Line | Data |
---|---|---|
a4b6fc86 AC |
1 | /* Motorola m68k native support for GNU/Linux. |
2 | ||
ecd75fc8 | 3 | Copyright (C) 1996-2014 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" | |
0e9f083f | 25 | #include <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/dir.h> |
33 | #include <signal.h> | |
0280a90a | 34 | #include <sys/ptrace.h> |
c906108c SS |
35 | #include <sys/user.h> |
36 | #include <sys/ioctl.h> | |
37 | #include <fcntl.h> | |
38 | #include <sys/procfs.h> | |
39 | ||
0280a90a AS |
40 | #ifdef HAVE_SYS_REG_H |
41 | #include <sys/reg.h> | |
42 | #endif | |
43 | ||
c906108c | 44 | #include <sys/file.h> |
53ce3c39 | 45 | #include <sys/stat.h> |
c906108c SS |
46 | |
47 | #include "floatformat.h" | |
48 | ||
49 | #include "target.h" | |
3e00823e | 50 | |
025bb325 | 51 | /* Prototypes for supply_gregset etc. */ |
3e00823e | 52 | #include "gregset.h" |
7b8b6d6d AS |
53 | |
54 | /* Defines ps_err_e, struct ps_prochandle. */ | |
55 | #include "gdb_proc_service.h" | |
56 | ||
57 | #ifndef PTRACE_GET_THREAD_AREA | |
58 | #define PTRACE_GET_THREAD_AREA 25 | |
59 | #endif | |
c906108c | 60 | \f |
c9f4d572 | 61 | /* This table must line up with gdbarch_register_name in "m68k-tdep.c". */ |
c5aa993b | 62 | static const int regmap[] = |
c906108c SS |
63 | { |
64 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, | |
65 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, | |
66 | PT_SR, PT_PC, | |
67 | /* PT_FP0, ..., PT_FP7 */ | |
68 | 21, 24, 27, 30, 33, 36, 39, 42, | |
69 | /* PT_FPCR, PT_FPSR, PT_FPIAR */ | |
70 | 45, 46, 47 | |
71 | }; | |
72 | ||
0280a90a AS |
73 | /* Which ptrace request retrieves which registers? |
74 | These apply to the corresponding SET requests as well. */ | |
75 | #define NUM_GREGS (18) | |
76 | #define MAX_NUM_REGS (NUM_GREGS + 11) | |
77 | ||
0c13fc49 | 78 | static int |
0280a90a AS |
79 | getregs_supplies (int regno) |
80 | { | |
81 | return 0 <= regno && regno < NUM_GREGS; | |
82 | } | |
83 | ||
0c13fc49 | 84 | static int |
0280a90a AS |
85 | getfpregs_supplies (int regno) |
86 | { | |
4ed226fe | 87 | return M68K_FP0_REGNUM <= regno && regno <= M68K_FPI_REGNUM; |
0280a90a AS |
88 | } |
89 | ||
90 | /* Does the current host support the GETREGS request? */ | |
0c13fc49 | 91 | static int have_ptrace_getregs = |
0280a90a AS |
92 | #ifdef HAVE_PTRACE_GETREGS |
93 | 1 | |
94 | #else | |
95 | 0 | |
96 | #endif | |
97 | ; | |
98 | ||
99 | \f | |
100 | ||
0280a90a AS |
101 | /* Fetching registers directly from the U area, one at a time. */ |
102 | ||
0280a90a AS |
103 | /* Fetch one register. */ |
104 | ||
105 | static void | |
56be3814 | 106 | fetch_register (struct regcache *regcache, int regno) |
0280a90a | 107 | { |
c984b7ff | 108 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
89e028e2 | 109 | long regaddr, val; |
52f0bd74 | 110 | int i; |
e362b510 | 111 | gdb_byte buf[MAX_REGISTER_SIZE]; |
0280a90a AS |
112 | int tid; |
113 | ||
025bb325 | 114 | /* Overload thread id onto process id. */ |
dfd4cc63 | 115 | tid = ptid_get_lwp (inferior_ptid); |
8de307e0 | 116 | if (tid == 0) |
dfd4cc63 | 117 | tid = ptid_get_pid (inferior_ptid); /* no thread id, just use |
025bb325 | 118 | process id. */ |
0280a90a | 119 | |
de732108 | 120 | regaddr = 4 * regmap[regno]; |
335d71d6 | 121 | for (i = 0; i < register_size (gdbarch, regno); i += sizeof (long)) |
0280a90a AS |
122 | { |
123 | errno = 0; | |
89e028e2 AS |
124 | val = ptrace (PTRACE_PEEKUSER, tid, regaddr, 0); |
125 | memcpy (&buf[i], &val, sizeof (long)); | |
335d71d6 | 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); |
89e028e2 | 163 | long regaddr, val; |
52f0bd74 | 164 | int i; |
0280a90a | 165 | int tid; |
e362b510 | 166 | gdb_byte buf[MAX_REGISTER_SIZE]; |
0280a90a | 167 | |
025bb325 | 168 | /* Overload thread id onto process id. */ |
dfd4cc63 | 169 | tid = ptid_get_lwp (inferior_ptid); |
8de307e0 | 170 | if (tid == 0) |
dfd4cc63 | 171 | tid = ptid_get_pid (inferior_ptid); /* no thread id, just use |
025bb325 | 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; | |
89e028e2 AS |
183 | memcpy (&val, &buf[i], sizeof (long)); |
184 | ptrace (PTRACE_POKEUSER, tid, regaddr, val); | |
335d71d6 | 185 | regaddr += sizeof (long); |
0280a90a | 186 | if (errno != 0) |
335d71d6 AS |
187 | error (_("Couldn't write register %s (#%d): %s."), |
188 | gdbarch_register_name (gdbarch, regno), | |
189 | regno, safe_strerror (errno)); | |
0280a90a AS |
190 | } |
191 | } | |
192 | ||
193 | /* Store our register values back into the inferior. | |
194 | If REGNO is negative, do this for all registers. | |
195 | Otherwise, REGNO specifies which register (so we can save time). */ | |
196 | ||
10d6c8cd | 197 | static void |
56be3814 | 198 | old_store_inferior_registers (const struct regcache *regcache, int regno) |
0280a90a AS |
199 | { |
200 | if (regno >= 0) | |
201 | { | |
56be3814 | 202 | store_register (regcache, regno); |
0280a90a AS |
203 | } |
204 | else | |
205 | { | |
c984b7ff UW |
206 | for (regno = 0; |
207 | regno < gdbarch_num_regs (get_regcache_arch (regcache)); | |
208 | regno++) | |
0280a90a | 209 | { |
56be3814 | 210 | store_register (regcache, regno); |
0280a90a AS |
211 | } |
212 | } | |
213 | } | |
214 | \f | |
f175af98 DJ |
215 | /* Given a pointer to a general register set in /proc format |
216 | (elf_gregset_t *), unpack the register contents and supply | |
025bb325 | 217 | them as gdb's idea of the current register values. */ |
c906108c | 218 | |
c906108c | 219 | void |
7f7fe91e | 220 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
c906108c | 221 | { |
c984b7ff | 222 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
7f7fe91e | 223 | const elf_greg_t *regp = (const elf_greg_t *) gregsetp; |
c906108c SS |
224 | int regi; |
225 | ||
3e8c568d | 226 | for (regi = M68K_D0_REGNUM; |
c984b7ff | 227 | regi <= gdbarch_sp_regnum (gdbarch); |
3e8c568d | 228 | regi++) |
7f7fe91e | 229 | regcache_raw_supply (regcache, regi, ®p[regmap[regi]]); |
c984b7ff | 230 | regcache_raw_supply (regcache, gdbarch_ps_regnum (gdbarch), |
3e8c568d UW |
231 | ®p[PT_SR]); |
232 | regcache_raw_supply (regcache, | |
c984b7ff | 233 | gdbarch_pc_regnum (gdbarch), ®p[PT_PC]); |
0280a90a AS |
234 | } |
235 | ||
236 | /* Fill register REGNO (if it is a general-purpose register) in | |
237 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, | |
238 | do this for all registers. */ | |
239 | void | |
7f7fe91e UW |
240 | fill_gregset (const struct regcache *regcache, |
241 | elf_gregset_t *gregsetp, int regno) | |
0280a90a AS |
242 | { |
243 | elf_greg_t *regp = (elf_greg_t *) gregsetp; | |
244 | int i; | |
245 | ||
246 | for (i = 0; i < NUM_GREGS; i++) | |
8de307e0 | 247 | if (regno == -1 || regno == i) |
7f7fe91e | 248 | regcache_raw_collect (regcache, i, regp + regmap[i]); |
0280a90a AS |
249 | } |
250 | ||
251 | #ifdef HAVE_PTRACE_GETREGS | |
252 | ||
253 | /* Fetch all general-purpose registers from process/thread TID and | |
254 | store their values in GDB's register array. */ | |
255 | ||
256 | static void | |
56be3814 | 257 | fetch_regs (struct regcache *regcache, int tid) |
0280a90a AS |
258 | { |
259 | elf_gregset_t regs; | |
260 | ||
261 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
262 | { | |
263 | if (errno == EIO) | |
264 | { | |
265 | /* The kernel we're running on doesn't support the GETREGS | |
266 | request. Reset `have_ptrace_getregs'. */ | |
267 | have_ptrace_getregs = 0; | |
268 | return; | |
269 | } | |
270 | ||
e2e0b3e5 | 271 | perror_with_name (_("Couldn't get registers")); |
0280a90a AS |
272 | } |
273 | ||
56be3814 | 274 | supply_gregset (regcache, (const elf_gregset_t *) ®s); |
c906108c SS |
275 | } |
276 | ||
0280a90a AS |
277 | /* Store all valid general-purpose registers in GDB's register array |
278 | into the process/thread specified by TID. */ | |
279 | ||
280 | static void | |
56be3814 | 281 | store_regs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
282 | { |
283 | elf_gregset_t regs; | |
284 | ||
285 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 286 | perror_with_name (_("Couldn't get registers")); |
0280a90a | 287 | |
56be3814 | 288 | fill_gregset (regcache, ®s, regno); |
0280a90a AS |
289 | |
290 | if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 291 | perror_with_name (_("Couldn't write registers")); |
0280a90a AS |
292 | } |
293 | ||
294 | #else | |
295 | ||
025bb325 MS |
296 | static void fetch_regs (struct regcache *regcache, int tid) |
297 | { | |
298 | } | |
299 | ||
300 | static void store_regs (const struct regcache *regcache, int tid, int regno) | |
301 | { | |
302 | } | |
0280a90a AS |
303 | |
304 | #endif | |
305 | ||
306 | \f | |
307 | /* Transfering floating-point registers between GDB, inferiors and cores. */ | |
308 | ||
309 | /* What is the address of fpN within the floating-point register set F? */ | |
7f7fe91e | 310 | #define FPREG_ADDR(f, n) (&(f)->fpregs[(n) * 3]) |
0280a90a AS |
311 | |
312 | /* Fill GDB's register array with the floating-point register values in | |
313 | *FPREGSETP. */ | |
c906108c | 314 | |
c5aa993b | 315 | void |
7f7fe91e | 316 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
c906108c | 317 | { |
c984b7ff | 318 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c906108c SS |
319 | int regi; |
320 | ||
c984b7ff UW |
321 | for (regi = gdbarch_fp0_regnum (gdbarch); |
322 | regi < gdbarch_fp0_regnum (gdbarch) + 8; regi++) | |
7f7fe91e | 323 | regcache_raw_supply (regcache, regi, |
3e8c568d | 324 | FPREG_ADDR (fpregsetp, |
c984b7ff | 325 | regi - gdbarch_fp0_regnum (gdbarch))); |
7f7fe91e UW |
326 | regcache_raw_supply (regcache, M68K_FPC_REGNUM, &fpregsetp->fpcntl[0]); |
327 | regcache_raw_supply (regcache, M68K_FPS_REGNUM, &fpregsetp->fpcntl[1]); | |
328 | regcache_raw_supply (regcache, M68K_FPI_REGNUM, &fpregsetp->fpcntl[2]); | |
c906108c SS |
329 | } |
330 | ||
0280a90a AS |
331 | /* Fill register REGNO (if it is a floating-point register) in |
332 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, | |
333 | do this for all registers. */ | |
334 | ||
335 | void | |
7f7fe91e UW |
336 | fill_fpregset (const struct regcache *regcache, |
337 | elf_fpregset_t *fpregsetp, int regno) | |
0280a90a | 338 | { |
c984b7ff | 339 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
0280a90a AS |
340 | int i; |
341 | ||
342 | /* Fill in the floating-point registers. */ | |
c984b7ff UW |
343 | for (i = gdbarch_fp0_regnum (gdbarch); |
344 | i < gdbarch_fp0_regnum (gdbarch) + 8; i++) | |
0280a90a | 345 | if (regno == -1 || regno == i) |
7f7fe91e | 346 | regcache_raw_collect (regcache, i, |
3e8c568d | 347 | FPREG_ADDR (fpregsetp, |
c984b7ff | 348 | i - gdbarch_fp0_regnum (gdbarch))); |
0280a90a AS |
349 | |
350 | /* Fill in the floating-point control registers. */ | |
32eeb91a | 351 | for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++) |
0280a90a | 352 | if (regno == -1 || regno == i) |
7f7fe91e UW |
353 | regcache_raw_collect (regcache, i, |
354 | &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]); | |
0280a90a AS |
355 | } |
356 | ||
357 | #ifdef HAVE_PTRACE_GETREGS | |
358 | ||
359 | /* Fetch all floating-point registers from process/thread TID and store | |
360 | thier values in GDB's register array. */ | |
361 | ||
362 | static void | |
56be3814 | 363 | fetch_fpregs (struct regcache *regcache, int tid) |
0280a90a AS |
364 | { |
365 | elf_fpregset_t fpregs; | |
366 | ||
367 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 368 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 369 | |
56be3814 | 370 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs); |
0280a90a AS |
371 | } |
372 | ||
373 | /* Store all valid floating-point registers in GDB's register array | |
374 | into the process/thread specified by TID. */ | |
375 | ||
376 | static void | |
56be3814 | 377 | store_fpregs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
378 | { |
379 | elf_fpregset_t fpregs; | |
380 | ||
381 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 382 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 383 | |
56be3814 | 384 | fill_fpregset (regcache, &fpregs, regno); |
0280a90a AS |
385 | |
386 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 387 | perror_with_name (_("Couldn't write floating point status")); |
0280a90a AS |
388 | } |
389 | ||
390 | #else | |
391 | ||
025bb325 MS |
392 | static void fetch_fpregs (struct regcache *regcache, int tid) |
393 | { | |
394 | } | |
395 | ||
396 | static void store_fpregs (const struct regcache *regcache, int tid, int regno) | |
397 | { | |
398 | } | |
0280a90a | 399 | |
c906108c | 400 | #endif |
0280a90a AS |
401 | \f |
402 | /* Transferring arbitrary registers between GDB and inferior. */ | |
403 | ||
404 | /* Fetch register REGNO from the child process. If REGNO is -1, do | |
405 | this for all registers (including the floating point and SSE | |
406 | registers). */ | |
407 | ||
10d6c8cd | 408 | static void |
28439f5e PA |
409 | m68k_linux_fetch_inferior_registers (struct target_ops *ops, |
410 | struct regcache *regcache, int regno) | |
0280a90a AS |
411 | { |
412 | int tid; | |
413 | ||
414 | /* Use the old method of peeking around in `struct user' if the | |
415 | GETREGS request isn't available. */ | |
416 | if (! have_ptrace_getregs) | |
417 | { | |
56be3814 | 418 | old_fetch_inferior_registers (regcache, regno); |
0280a90a AS |
419 | return; |
420 | } | |
421 | ||
a4b6fc86 | 422 | /* GNU/Linux LWP ID's are process ID's. */ |
dfd4cc63 | 423 | tid = ptid_get_lwp (inferior_ptid); |
8de307e0 | 424 | if (tid == 0) |
dfd4cc63 | 425 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
f175af98 | 426 | |
0280a90a AS |
427 | /* Use the PTRACE_GETFPXREGS request whenever possible, since it |
428 | transfers more registers in one system call, and we'll cache the | |
429 | results. But remember that fetch_fpxregs can fail, and return | |
430 | zero. */ | |
431 | if (regno == -1) | |
432 | { | |
56be3814 | 433 | fetch_regs (regcache, tid); |
0280a90a AS |
434 | |
435 | /* The call above might reset `have_ptrace_getregs'. */ | |
436 | if (! have_ptrace_getregs) | |
437 | { | |
56be3814 | 438 | old_fetch_inferior_registers (regcache, -1); |
0280a90a AS |
439 | return; |
440 | } | |
441 | ||
56be3814 | 442 | fetch_fpregs (regcache, tid); |
0280a90a AS |
443 | return; |
444 | } | |
445 | ||
446 | if (getregs_supplies (regno)) | |
447 | { | |
56be3814 | 448 | fetch_regs (regcache, tid); |
0280a90a AS |
449 | return; |
450 | } | |
451 | ||
452 | if (getfpregs_supplies (regno)) | |
453 | { | |
56be3814 | 454 | fetch_fpregs (regcache, tid); |
0280a90a AS |
455 | return; |
456 | } | |
457 | ||
458 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 459 | _("Got request for bad register number %d."), regno); |
0280a90a AS |
460 | } |
461 | ||
462 | /* Store register REGNO back into the child process. If REGNO is -1, | |
463 | do this for all registers (including the floating point and SSE | |
464 | registers). */ | |
10d6c8cd | 465 | static void |
28439f5e PA |
466 | m68k_linux_store_inferior_registers (struct target_ops *ops, |
467 | struct regcache *regcache, int regno) | |
0280a90a AS |
468 | { |
469 | int tid; | |
470 | ||
471 | /* Use the old method of poking around in `struct user' if the | |
472 | SETREGS request isn't available. */ | |
473 | if (! have_ptrace_getregs) | |
474 | { | |
56be3814 | 475 | old_store_inferior_registers (regcache, regno); |
0280a90a AS |
476 | return; |
477 | } | |
478 | ||
a4b6fc86 | 479 | /* GNU/Linux LWP ID's are process ID's. */ |
dfd4cc63 | 480 | tid = ptid_get_lwp (inferior_ptid); |
8de307e0 | 481 | if (tid == 0) |
dfd4cc63 | 482 | tid = ptid_get_pid (inferior_ptid); /* Not a threaded program. */ |
0280a90a AS |
483 | |
484 | /* Use the PTRACE_SETFPREGS requests whenever possible, since it | |
485 | transfers more registers in one system call. But remember that | |
486 | store_fpregs can fail, and return zero. */ | |
487 | if (regno == -1) | |
488 | { | |
56be3814 UW |
489 | store_regs (regcache, tid, regno); |
490 | store_fpregs (regcache, tid, regno); | |
0280a90a AS |
491 | return; |
492 | } | |
493 | ||
494 | if (getregs_supplies (regno)) | |
495 | { | |
56be3814 | 496 | store_regs (regcache, tid, regno); |
0280a90a AS |
497 | return; |
498 | } | |
499 | ||
500 | if (getfpregs_supplies (regno)) | |
501 | { | |
56be3814 | 502 | store_fpregs (regcache, tid, regno); |
0280a90a AS |
503 | return; |
504 | } | |
505 | ||
506 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 507 | _("Got request to store bad register number %d."), regno); |
0280a90a | 508 | } |
f175af98 DJ |
509 | \f |
510 | /* Interpreting register set info found in core files. */ | |
511 | ||
512 | /* Provide registers to GDB from a core file. | |
513 | ||
514 | (We can't use the generic version of this function in | |
515 | core-regset.c, because we need to use elf_gregset_t instead of | |
516 | gregset_t.) | |
517 | ||
518 | CORE_REG_SECT points to an array of bytes, which are the contents | |
519 | of a `note' from a core file which BFD thinks might contain | |
520 | register contents. CORE_REG_SIZE is its size. | |
521 | ||
522 | WHICH says which register set corelow suspects this is: | |
523 | 0 --- the general-purpose register set, in elf_gregset_t format | |
524 | 2 --- the floating-point register set, in elf_fpregset_t format | |
525 | ||
a4b6fc86 | 526 | REG_ADDR isn't used on GNU/Linux. */ |
f175af98 DJ |
527 | |
528 | static void | |
9eefc95f UW |
529 | fetch_core_registers (struct regcache *regcache, |
530 | char *core_reg_sect, unsigned core_reg_size, | |
f175af98 DJ |
531 | int which, CORE_ADDR reg_addr) |
532 | { | |
533 | elf_gregset_t gregset; | |
534 | elf_fpregset_t fpregset; | |
535 | ||
536 | switch (which) | |
537 | { | |
538 | case 0: | |
539 | if (core_reg_size != sizeof (gregset)) | |
8a3fe4f8 | 540 | warning (_("Wrong size gregset in core file.")); |
f175af98 DJ |
541 | else |
542 | { | |
543 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); | |
9eefc95f | 544 | supply_gregset (regcache, (const elf_gregset_t *) &gregset); |
f175af98 DJ |
545 | } |
546 | break; | |
547 | ||
548 | case 2: | |
549 | if (core_reg_size != sizeof (fpregset)) | |
8a3fe4f8 | 550 | warning (_("Wrong size fpregset in core file.")); |
f175af98 DJ |
551 | else |
552 | { | |
553 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); | |
9eefc95f | 554 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregset); |
f175af98 DJ |
555 | } |
556 | break; | |
557 | ||
558 | default: | |
559 | /* We've covered all the kinds of registers we know about here, | |
560 | so this must be something we wouldn't know what to do with | |
561 | anyway. Just ignore it. */ | |
562 | break; | |
563 | } | |
564 | } | |
c906108c | 565 | \f |
c5aa993b | 566 | |
7b8b6d6d AS |
567 | /* Fetch the thread-local storage pointer for libthread_db. */ |
568 | ||
569 | ps_err_e | |
570 | ps_get_thread_area (const struct ps_prochandle *ph, | |
571 | lwpid_t lwpid, int idx, void **base) | |
572 | { | |
573 | if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) < 0) | |
574 | return PS_ERR; | |
575 | ||
576 | /* IDX is the bias from the thread pointer to the beginning of the | |
577 | thread descriptor. It has to be subtracted due to implementation | |
578 | quirks in libthread_db. */ | |
579 | *base = (char *) *base - idx; | |
580 | ||
581 | return PS_OK; | |
582 | } | |
583 | \f | |
584 | ||
a4b6fc86 AC |
585 | /* Register that we are able to handle GNU/Linux ELF core file |
586 | formats. */ | |
f175af98 DJ |
587 | |
588 | static struct core_fns linux_elf_core_fns = | |
589 | { | |
590 | bfd_target_elf_flavour, /* core_flavour */ | |
591 | default_check_format, /* check_format */ | |
592 | default_core_sniffer, /* core_sniffer */ | |
593 | fetch_core_registers, /* core_read_registers */ | |
594 | NULL /* next */ | |
595 | }; | |
596 | ||
10d6c8cd DJ |
597 | void _initialize_m68k_linux_nat (void); |
598 | ||
f175af98 | 599 | void |
5ae5f592 | 600 | _initialize_m68k_linux_nat (void) |
f175af98 | 601 | { |
10d6c8cd DJ |
602 | struct target_ops *t; |
603 | ||
604 | /* Fill in the generic GNU/Linux methods. */ | |
605 | t = linux_target (); | |
606 | ||
607 | /* Add our register access methods. */ | |
608 | t->to_fetch_registers = m68k_linux_fetch_inferior_registers; | |
609 | t->to_store_registers = m68k_linux_store_inferior_registers; | |
610 | ||
611 | /* Register the target. */ | |
f973ed9c | 612 | linux_nat_add_target (t); |
10d6c8cd | 613 | |
00e32a35 | 614 | deprecated_add_core_fns (&linux_elf_core_fns); |
f175af98 | 615 | } |