Commit | Line | Data |
---|---|---|
a4b6fc86 AC |
1 | /* Motorola m68k native support for GNU/Linux. |
2 | ||
6aba47ca | 3 | Copyright (C) 1996, 1998, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
10d6c8cd | 4 | Free Software Foundation, Inc. |
c906108c | 5 | |
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 11 | (at your option) any later version. |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
20 | |
21 | #include "defs.h" | |
22 | #include "frame.h" | |
23 | #include "inferior.h" | |
24 | #include "language.h" | |
25 | #include "gdbcore.h" | |
32eeb91a | 26 | #include "gdb_string.h" |
4e052eda | 27 | #include "regcache.h" |
10d6c8cd DJ |
28 | #include "target.h" |
29 | #include "linux-nat.h" | |
c906108c | 30 | |
32eeb91a AS |
31 | #include "m68k-tdep.h" |
32 | ||
c906108c SS |
33 | #include <sys/param.h> |
34 | #include <sys/dir.h> | |
35 | #include <signal.h> | |
0280a90a | 36 | #include <sys/ptrace.h> |
c906108c SS |
37 | #include <sys/user.h> |
38 | #include <sys/ioctl.h> | |
39 | #include <fcntl.h> | |
40 | #include <sys/procfs.h> | |
41 | ||
0280a90a AS |
42 | #ifdef HAVE_SYS_REG_H |
43 | #include <sys/reg.h> | |
44 | #endif | |
45 | ||
c906108c SS |
46 | #include <sys/file.h> |
47 | #include "gdb_stat.h" | |
48 | ||
49 | #include "floatformat.h" | |
50 | ||
51 | #include "target.h" | |
3e00823e UW |
52 | |
53 | /* Prototypes for supply_gregset etc. */ | |
54 | #include "gregset.h" | |
c906108c | 55 | \f |
c9f4d572 | 56 | /* This table must line up with gdbarch_register_name in "m68k-tdep.c". */ |
c5aa993b | 57 | static const int regmap[] = |
c906108c SS |
58 | { |
59 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, | |
60 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, | |
61 | PT_SR, PT_PC, | |
62 | /* PT_FP0, ..., PT_FP7 */ | |
63 | 21, 24, 27, 30, 33, 36, 39, 42, | |
64 | /* PT_FPCR, PT_FPSR, PT_FPIAR */ | |
65 | 45, 46, 47 | |
66 | }; | |
67 | ||
0280a90a AS |
68 | /* Which ptrace request retrieves which registers? |
69 | These apply to the corresponding SET requests as well. */ | |
70 | #define NUM_GREGS (18) | |
71 | #define MAX_NUM_REGS (NUM_GREGS + 11) | |
72 | ||
73 | int | |
74 | getregs_supplies (int regno) | |
75 | { | |
76 | return 0 <= regno && regno < NUM_GREGS; | |
77 | } | |
78 | ||
79 | int | |
80 | getfpregs_supplies (int regno) | |
81 | { | |
3e8c568d UW |
82 | return gdbarch_fp0_regnum (current_gdbarch) <= regno |
83 | && regno <= M68K_FPI_REGNUM; | |
0280a90a AS |
84 | } |
85 | ||
86 | /* Does the current host support the GETREGS request? */ | |
87 | int have_ptrace_getregs = | |
88 | #ifdef HAVE_PTRACE_GETREGS | |
89 | 1 | |
90 | #else | |
91 | 0 | |
92 | #endif | |
93 | ; | |
94 | ||
95 | \f | |
96 | ||
0280a90a AS |
97 | /* Fetching registers directly from the U area, one at a time. */ |
98 | ||
99 | /* FIXME: This duplicates code from `inptrace.c'. The problem is that we | |
100 | define FETCH_INFERIOR_REGISTERS since we want to use our own versions | |
101 | of {fetch,store}_inferior_registers that use the GETREGS request. This | |
102 | means that the code in `infptrace.c' is #ifdef'd out. But we need to | |
103 | fall back on that code when GDB is running on top of a kernel that | |
104 | doesn't support the GETREGS request. */ | |
105 | ||
106 | #ifndef PT_READ_U | |
107 | #define PT_READ_U PTRACE_PEEKUSR | |
108 | #endif | |
109 | #ifndef PT_WRITE_U | |
110 | #define PT_WRITE_U PTRACE_POKEUSR | |
111 | #endif | |
112 | ||
0280a90a AS |
113 | /* Fetch one register. */ |
114 | ||
115 | static void | |
56be3814 | 116 | fetch_register (struct regcache *regcache, int regno) |
0280a90a AS |
117 | { |
118 | /* This isn't really an address. But ptrace thinks of it as one. */ | |
119 | CORE_ADDR regaddr; | |
120 | char mess[128]; /* For messages */ | |
52f0bd74 | 121 | int i; |
123a958e | 122 | char buf[MAX_REGISTER_SIZE]; |
0280a90a AS |
123 | int tid; |
124 | ||
8d4c1ba3 | 125 | if (gdbarch_cannot_fetch_register (current_gdbarch, regno)) |
0280a90a | 126 | { |
8de307e0 | 127 | memset (buf, '\0', register_size (current_gdbarch, regno)); /* Supply zeroes */ |
56be3814 | 128 | regcache_raw_supply (regcache, regno, buf); |
0280a90a AS |
129 | return; |
130 | } | |
131 | ||
132 | /* Overload thread id onto process id */ | |
8de307e0 AS |
133 | tid = TIDGET (inferior_ptid); |
134 | if (tid == 0) | |
0280a90a AS |
135 | tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ |
136 | ||
de732108 | 137 | regaddr = 4 * regmap[regno]; |
8de307e0 | 138 | for (i = 0; i < register_size (current_gdbarch, regno); |
5f402660 | 139 | i += sizeof (PTRACE_TYPE_RET)) |
0280a90a AS |
140 | { |
141 | errno = 0; | |
5f402660 UW |
142 | *(PTRACE_TYPE_RET *) &buf[i] = ptrace (PT_READ_U, tid, |
143 | (PTRACE_TYPE_ARG3) regaddr, 0); | |
144 | regaddr += sizeof (PTRACE_TYPE_RET); | |
0280a90a AS |
145 | if (errno != 0) |
146 | { | |
147 | sprintf (mess, "reading register %s (#%d)", | |
c9f4d572 | 148 | gdbarch_register_name (current_gdbarch, regno), regno); |
0280a90a AS |
149 | perror_with_name (mess); |
150 | } | |
151 | } | |
56be3814 | 152 | regcache_raw_supply (regcache, regno, buf); |
0280a90a AS |
153 | } |
154 | ||
155 | /* Fetch register values from the inferior. | |
156 | If REGNO is negative, do this for all registers. | |
157 | Otherwise, REGNO specifies which register (so we can save time). */ | |
c906108c | 158 | |
10d6c8cd | 159 | static void |
56be3814 | 160 | old_fetch_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
161 | { |
162 | if (regno >= 0) | |
163 | { | |
56be3814 | 164 | fetch_register (regcache, regno); |
0280a90a AS |
165 | } |
166 | else | |
167 | { | |
f57d151a | 168 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
0280a90a | 169 | { |
56be3814 | 170 | fetch_register (regcache, regno); |
0280a90a AS |
171 | } |
172 | } | |
173 | } | |
174 | ||
175 | /* Store one register. */ | |
176 | ||
177 | static void | |
56be3814 | 178 | store_register (const struct regcache *regcache, int regno) |
0280a90a AS |
179 | { |
180 | /* This isn't really an address. But ptrace thinks of it as one. */ | |
181 | CORE_ADDR regaddr; | |
182 | char mess[128]; /* For messages */ | |
52f0bd74 | 183 | int i; |
0280a90a | 184 | int tid; |
d9d9c31f | 185 | char buf[MAX_REGISTER_SIZE]; |
0280a90a | 186 | |
8d4c1ba3 UW |
187 | if (gdbarch_cannot_store_register (current_gdbarch, regno)) |
188 | return; | |
0280a90a AS |
189 | |
190 | /* Overload thread id onto process id */ | |
8de307e0 AS |
191 | tid = TIDGET (inferior_ptid); |
192 | if (tid == 0) | |
0280a90a AS |
193 | tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ |
194 | ||
de732108 | 195 | regaddr = 4 * regmap[regno]; |
9852326a AS |
196 | |
197 | /* Put the contents of regno into a local buffer */ | |
56be3814 | 198 | regcache_raw_collect (regcache, regno, buf); |
9852326a AS |
199 | |
200 | /* Store the local buffer into the inferior a chunk at the time. */ | |
8de307e0 | 201 | for (i = 0; i < register_size (current_gdbarch, regno); |
5f402660 | 202 | i += sizeof (PTRACE_TYPE_RET)) |
0280a90a AS |
203 | { |
204 | errno = 0; | |
5f402660 UW |
205 | ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) regaddr, |
206 | *(PTRACE_TYPE_RET *) (buf + i)); | |
207 | regaddr += sizeof (PTRACE_TYPE_RET); | |
0280a90a AS |
208 | if (errno != 0) |
209 | { | |
210 | sprintf (mess, "writing register %s (#%d)", | |
c9f4d572 | 211 | gdbarch_register_name (current_gdbarch, regno), regno); |
0280a90a AS |
212 | perror_with_name (mess); |
213 | } | |
214 | } | |
215 | } | |
216 | ||
217 | /* Store our register values back into the inferior. | |
218 | If REGNO is negative, do this for all registers. | |
219 | Otherwise, REGNO specifies which register (so we can save time). */ | |
220 | ||
10d6c8cd | 221 | static void |
56be3814 | 222 | old_store_inferior_registers (const struct regcache *regcache, int regno) |
0280a90a AS |
223 | { |
224 | if (regno >= 0) | |
225 | { | |
56be3814 | 226 | store_register (regcache, regno); |
0280a90a AS |
227 | } |
228 | else | |
229 | { | |
f57d151a | 230 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
0280a90a | 231 | { |
56be3814 | 232 | store_register (regcache, regno); |
0280a90a AS |
233 | } |
234 | } | |
235 | } | |
236 | \f | |
f175af98 DJ |
237 | /* Given a pointer to a general register set in /proc format |
238 | (elf_gregset_t *), unpack the register contents and supply | |
239 | them as gdb's idea of the current register values. */ | |
c906108c | 240 | |
c906108c | 241 | void |
7f7fe91e | 242 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
c906108c | 243 | { |
7f7fe91e | 244 | const elf_greg_t *regp = (const elf_greg_t *) gregsetp; |
c906108c SS |
245 | int regi; |
246 | ||
3e8c568d UW |
247 | for (regi = M68K_D0_REGNUM; |
248 | regi <= gdbarch_sp_regnum (current_gdbarch); | |
249 | regi++) | |
7f7fe91e | 250 | regcache_raw_supply (regcache, regi, ®p[regmap[regi]]); |
3e8c568d UW |
251 | regcache_raw_supply (regcache, gdbarch_ps_regnum (current_gdbarch), |
252 | ®p[PT_SR]); | |
253 | regcache_raw_supply (regcache, | |
254 | gdbarch_pc_regnum (current_gdbarch), ®p[PT_PC]); | |
0280a90a AS |
255 | } |
256 | ||
257 | /* Fill register REGNO (if it is a general-purpose register) in | |
258 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, | |
259 | do this for all registers. */ | |
260 | void | |
7f7fe91e UW |
261 | fill_gregset (const struct regcache *regcache, |
262 | elf_gregset_t *gregsetp, int regno) | |
0280a90a AS |
263 | { |
264 | elf_greg_t *regp = (elf_greg_t *) gregsetp; | |
265 | int i; | |
266 | ||
267 | for (i = 0; i < NUM_GREGS; i++) | |
8de307e0 | 268 | if (regno == -1 || regno == i) |
7f7fe91e | 269 | regcache_raw_collect (regcache, i, regp + regmap[i]); |
0280a90a AS |
270 | } |
271 | ||
272 | #ifdef HAVE_PTRACE_GETREGS | |
273 | ||
274 | /* Fetch all general-purpose registers from process/thread TID and | |
275 | store their values in GDB's register array. */ | |
276 | ||
277 | static void | |
56be3814 | 278 | fetch_regs (struct regcache *regcache, int tid) |
0280a90a AS |
279 | { |
280 | elf_gregset_t regs; | |
281 | ||
282 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
283 | { | |
284 | if (errno == EIO) | |
285 | { | |
286 | /* The kernel we're running on doesn't support the GETREGS | |
287 | request. Reset `have_ptrace_getregs'. */ | |
288 | have_ptrace_getregs = 0; | |
289 | return; | |
290 | } | |
291 | ||
e2e0b3e5 | 292 | perror_with_name (_("Couldn't get registers")); |
0280a90a AS |
293 | } |
294 | ||
56be3814 | 295 | supply_gregset (regcache, (const elf_gregset_t *) ®s); |
c906108c SS |
296 | } |
297 | ||
0280a90a AS |
298 | /* Store all valid general-purpose registers in GDB's register array |
299 | into the process/thread specified by TID. */ | |
300 | ||
301 | static void | |
56be3814 | 302 | store_regs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
303 | { |
304 | elf_gregset_t regs; | |
305 | ||
306 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 307 | perror_with_name (_("Couldn't get registers")); |
0280a90a | 308 | |
56be3814 | 309 | fill_gregset (regcache, ®s, regno); |
0280a90a AS |
310 | |
311 | if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 312 | perror_with_name (_("Couldn't write registers")); |
0280a90a AS |
313 | } |
314 | ||
315 | #else | |
316 | ||
56be3814 UW |
317 | static void fetch_regs (struct regcache *regcache, int tid) {} |
318 | static void store_regs (const struct regcache *regcache, int tid, int regno) {} | |
0280a90a AS |
319 | |
320 | #endif | |
321 | ||
322 | \f | |
323 | /* Transfering floating-point registers between GDB, inferiors and cores. */ | |
324 | ||
325 | /* What is the address of fpN within the floating-point register set F? */ | |
7f7fe91e | 326 | #define FPREG_ADDR(f, n) (&(f)->fpregs[(n) * 3]) |
0280a90a AS |
327 | |
328 | /* Fill GDB's register array with the floating-point register values in | |
329 | *FPREGSETP. */ | |
c906108c | 330 | |
c5aa993b | 331 | void |
7f7fe91e | 332 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
c906108c SS |
333 | { |
334 | int regi; | |
335 | ||
3e8c568d UW |
336 | for (regi = gdbarch_fp0_regnum (current_gdbarch); |
337 | regi < gdbarch_fp0_regnum (current_gdbarch) + 8; regi++) | |
7f7fe91e | 338 | regcache_raw_supply (regcache, regi, |
3e8c568d UW |
339 | FPREG_ADDR (fpregsetp, |
340 | regi - gdbarch_fp0_regnum | |
341 | (current_gdbarch))); | |
7f7fe91e UW |
342 | regcache_raw_supply (regcache, M68K_FPC_REGNUM, &fpregsetp->fpcntl[0]); |
343 | regcache_raw_supply (regcache, M68K_FPS_REGNUM, &fpregsetp->fpcntl[1]); | |
344 | regcache_raw_supply (regcache, M68K_FPI_REGNUM, &fpregsetp->fpcntl[2]); | |
c906108c SS |
345 | } |
346 | ||
0280a90a AS |
347 | /* Fill register REGNO (if it is a floating-point register) in |
348 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, | |
349 | do this for all registers. */ | |
350 | ||
351 | void | |
7f7fe91e UW |
352 | fill_fpregset (const struct regcache *regcache, |
353 | elf_fpregset_t *fpregsetp, int regno) | |
0280a90a AS |
354 | { |
355 | int i; | |
356 | ||
357 | /* Fill in the floating-point registers. */ | |
3e8c568d UW |
358 | for (i = gdbarch_fp0_regnum (current_gdbarch); |
359 | i < gdbarch_fp0_regnum (current_gdbarch) + 8; i++) | |
0280a90a | 360 | if (regno == -1 || regno == i) |
7f7fe91e | 361 | regcache_raw_collect (regcache, i, |
3e8c568d UW |
362 | FPREG_ADDR (fpregsetp, |
363 | i - gdbarch_fp0_regnum | |
364 | (current_gdbarch))); | |
0280a90a AS |
365 | |
366 | /* Fill in the floating-point control registers. */ | |
32eeb91a | 367 | for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++) |
0280a90a | 368 | if (regno == -1 || regno == i) |
7f7fe91e UW |
369 | regcache_raw_collect (regcache, i, |
370 | &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]); | |
0280a90a AS |
371 | } |
372 | ||
373 | #ifdef HAVE_PTRACE_GETREGS | |
374 | ||
375 | /* Fetch all floating-point registers from process/thread TID and store | |
376 | thier values in GDB's register array. */ | |
377 | ||
378 | static void | |
56be3814 | 379 | fetch_fpregs (struct regcache *regcache, int tid) |
0280a90a AS |
380 | { |
381 | elf_fpregset_t fpregs; | |
382 | ||
383 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 384 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 385 | |
56be3814 | 386 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs); |
0280a90a AS |
387 | } |
388 | ||
389 | /* Store all valid floating-point registers in GDB's register array | |
390 | into the process/thread specified by TID. */ | |
391 | ||
392 | static void | |
56be3814 | 393 | store_fpregs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
394 | { |
395 | elf_fpregset_t fpregs; | |
396 | ||
397 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 398 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 399 | |
56be3814 | 400 | fill_fpregset (regcache, &fpregs, regno); |
0280a90a AS |
401 | |
402 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 403 | perror_with_name (_("Couldn't write floating point status")); |
0280a90a AS |
404 | } |
405 | ||
406 | #else | |
407 | ||
56be3814 UW |
408 | static void fetch_fpregs (struct regcache *regcache, int tid) {} |
409 | static void store_fpregs (const struct regcache *regcache, int tid, int regno) {} | |
0280a90a | 410 | |
c906108c | 411 | #endif |
0280a90a AS |
412 | \f |
413 | /* Transferring arbitrary registers between GDB and inferior. */ | |
414 | ||
415 | /* Fetch register REGNO from the child process. If REGNO is -1, do | |
416 | this for all registers (including the floating point and SSE | |
417 | registers). */ | |
418 | ||
10d6c8cd | 419 | static void |
56be3814 | 420 | m68k_linux_fetch_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
421 | { |
422 | int tid; | |
423 | ||
424 | /* Use the old method of peeking around in `struct user' if the | |
425 | GETREGS request isn't available. */ | |
426 | if (! have_ptrace_getregs) | |
427 | { | |
56be3814 | 428 | old_fetch_inferior_registers (regcache, regno); |
0280a90a AS |
429 | return; |
430 | } | |
431 | ||
a4b6fc86 | 432 | /* GNU/Linux LWP ID's are process ID's. */ |
8de307e0 AS |
433 | tid = TIDGET (inferior_ptid); |
434 | if (tid == 0) | |
0280a90a | 435 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
f175af98 | 436 | |
0280a90a AS |
437 | /* Use the PTRACE_GETFPXREGS request whenever possible, since it |
438 | transfers more registers in one system call, and we'll cache the | |
439 | results. But remember that fetch_fpxregs can fail, and return | |
440 | zero. */ | |
441 | if (regno == -1) | |
442 | { | |
56be3814 | 443 | fetch_regs (regcache, tid); |
0280a90a AS |
444 | |
445 | /* The call above might reset `have_ptrace_getregs'. */ | |
446 | if (! have_ptrace_getregs) | |
447 | { | |
56be3814 | 448 | old_fetch_inferior_registers (regcache, -1); |
0280a90a AS |
449 | return; |
450 | } | |
451 | ||
56be3814 | 452 | fetch_fpregs (regcache, tid); |
0280a90a AS |
453 | return; |
454 | } | |
455 | ||
456 | if (getregs_supplies (regno)) | |
457 | { | |
56be3814 | 458 | fetch_regs (regcache, tid); |
0280a90a AS |
459 | return; |
460 | } | |
461 | ||
462 | if (getfpregs_supplies (regno)) | |
463 | { | |
56be3814 | 464 | fetch_fpregs (regcache, tid); |
0280a90a AS |
465 | return; |
466 | } | |
467 | ||
468 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 469 | _("Got request for bad register number %d."), regno); |
0280a90a AS |
470 | } |
471 | ||
472 | /* Store register REGNO back into the child process. If REGNO is -1, | |
473 | do this for all registers (including the floating point and SSE | |
474 | registers). */ | |
10d6c8cd | 475 | static void |
56be3814 | 476 | m68k_linux_store_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
477 | { |
478 | int tid; | |
479 | ||
480 | /* Use the old method of poking around in `struct user' if the | |
481 | SETREGS request isn't available. */ | |
482 | if (! have_ptrace_getregs) | |
483 | { | |
56be3814 | 484 | old_store_inferior_registers (regcache, regno); |
0280a90a AS |
485 | return; |
486 | } | |
487 | ||
a4b6fc86 | 488 | /* GNU/Linux LWP ID's are process ID's. */ |
8de307e0 AS |
489 | tid = TIDGET (inferior_ptid); |
490 | if (tid == 0) | |
0280a90a AS |
491 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
492 | ||
493 | /* Use the PTRACE_SETFPREGS requests whenever possible, since it | |
494 | transfers more registers in one system call. But remember that | |
495 | store_fpregs can fail, and return zero. */ | |
496 | if (regno == -1) | |
497 | { | |
56be3814 UW |
498 | store_regs (regcache, tid, regno); |
499 | store_fpregs (regcache, tid, regno); | |
0280a90a AS |
500 | return; |
501 | } | |
502 | ||
503 | if (getregs_supplies (regno)) | |
504 | { | |
56be3814 | 505 | store_regs (regcache, tid, regno); |
0280a90a AS |
506 | return; |
507 | } | |
508 | ||
509 | if (getfpregs_supplies (regno)) | |
510 | { | |
56be3814 | 511 | store_fpregs (regcache, tid, regno); |
0280a90a AS |
512 | return; |
513 | } | |
514 | ||
515 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 516 | _("Got request to store bad register number %d."), regno); |
0280a90a | 517 | } |
f175af98 DJ |
518 | \f |
519 | /* Interpreting register set info found in core files. */ | |
520 | ||
521 | /* Provide registers to GDB from a core file. | |
522 | ||
523 | (We can't use the generic version of this function in | |
524 | core-regset.c, because we need to use elf_gregset_t instead of | |
525 | gregset_t.) | |
526 | ||
527 | CORE_REG_SECT points to an array of bytes, which are the contents | |
528 | of a `note' from a core file which BFD thinks might contain | |
529 | register contents. CORE_REG_SIZE is its size. | |
530 | ||
531 | WHICH says which register set corelow suspects this is: | |
532 | 0 --- the general-purpose register set, in elf_gregset_t format | |
533 | 2 --- the floating-point register set, in elf_fpregset_t format | |
534 | ||
a4b6fc86 | 535 | REG_ADDR isn't used on GNU/Linux. */ |
f175af98 DJ |
536 | |
537 | static void | |
9eefc95f UW |
538 | fetch_core_registers (struct regcache *regcache, |
539 | char *core_reg_sect, unsigned core_reg_size, | |
f175af98 DJ |
540 | int which, CORE_ADDR reg_addr) |
541 | { | |
542 | elf_gregset_t gregset; | |
543 | elf_fpregset_t fpregset; | |
544 | ||
545 | switch (which) | |
546 | { | |
547 | case 0: | |
548 | if (core_reg_size != sizeof (gregset)) | |
8a3fe4f8 | 549 | warning (_("Wrong size gregset in core file.")); |
f175af98 DJ |
550 | else |
551 | { | |
552 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); | |
9eefc95f | 553 | supply_gregset (regcache, (const elf_gregset_t *) &gregset); |
f175af98 DJ |
554 | } |
555 | break; | |
556 | ||
557 | case 2: | |
558 | if (core_reg_size != sizeof (fpregset)) | |
8a3fe4f8 | 559 | warning (_("Wrong size fpregset in core file.")); |
f175af98 DJ |
560 | else |
561 | { | |
562 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); | |
9eefc95f | 563 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregset); |
f175af98 DJ |
564 | } |
565 | break; | |
566 | ||
567 | default: | |
568 | /* We've covered all the kinds of registers we know about here, | |
569 | so this must be something we wouldn't know what to do with | |
570 | anyway. Just ignore it. */ | |
571 | break; | |
572 | } | |
573 | } | |
c906108c | 574 | \f |
c5aa993b | 575 | |
a4b6fc86 AC |
576 | /* Register that we are able to handle GNU/Linux ELF core file |
577 | formats. */ | |
f175af98 DJ |
578 | |
579 | static struct core_fns linux_elf_core_fns = | |
580 | { | |
581 | bfd_target_elf_flavour, /* core_flavour */ | |
582 | default_check_format, /* check_format */ | |
583 | default_core_sniffer, /* core_sniffer */ | |
584 | fetch_core_registers, /* core_read_registers */ | |
585 | NULL /* next */ | |
586 | }; | |
587 | ||
10d6c8cd DJ |
588 | void _initialize_m68k_linux_nat (void); |
589 | ||
f175af98 | 590 | void |
5ae5f592 | 591 | _initialize_m68k_linux_nat (void) |
f175af98 | 592 | { |
10d6c8cd DJ |
593 | struct target_ops *t; |
594 | ||
595 | /* Fill in the generic GNU/Linux methods. */ | |
596 | t = linux_target (); | |
597 | ||
598 | /* Add our register access methods. */ | |
599 | t->to_fetch_registers = m68k_linux_fetch_inferior_registers; | |
600 | t->to_store_registers = m68k_linux_store_inferior_registers; | |
601 | ||
602 | /* Register the target. */ | |
f973ed9c | 603 | linux_nat_add_target (t); |
10d6c8cd | 604 | |
00e32a35 | 605 | deprecated_add_core_fns (&linux_elf_core_fns); |
f175af98 | 606 | } |