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 | |
10 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
20 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "frame.h" | |
25 | #include "inferior.h" | |
26 | #include "language.h" | |
27 | #include "gdbcore.h" | |
32eeb91a | 28 | #include "gdb_string.h" |
4e052eda | 29 | #include "regcache.h" |
10d6c8cd DJ |
30 | #include "target.h" |
31 | #include "linux-nat.h" | |
c906108c | 32 | |
32eeb91a AS |
33 | #include "m68k-tdep.h" |
34 | ||
c906108c SS |
35 | #include <sys/param.h> |
36 | #include <sys/dir.h> | |
37 | #include <signal.h> | |
0280a90a | 38 | #include <sys/ptrace.h> |
c906108c SS |
39 | #include <sys/user.h> |
40 | #include <sys/ioctl.h> | |
41 | #include <fcntl.h> | |
42 | #include <sys/procfs.h> | |
43 | ||
0280a90a AS |
44 | #ifdef HAVE_SYS_REG_H |
45 | #include <sys/reg.h> | |
46 | #endif | |
47 | ||
c906108c SS |
48 | #include <sys/file.h> |
49 | #include "gdb_stat.h" | |
50 | ||
51 | #include "floatformat.h" | |
52 | ||
53 | #include "target.h" | |
3e00823e UW |
54 | |
55 | /* Prototypes for supply_gregset etc. */ | |
56 | #include "gregset.h" | |
c906108c | 57 | \f |
c9f4d572 | 58 | /* This table must line up with gdbarch_register_name in "m68k-tdep.c". */ |
c5aa993b | 59 | static const int regmap[] = |
c906108c SS |
60 | { |
61 | PT_D0, PT_D1, PT_D2, PT_D3, PT_D4, PT_D5, PT_D6, PT_D7, | |
62 | PT_A0, PT_A1, PT_A2, PT_A3, PT_A4, PT_A5, PT_A6, PT_USP, | |
63 | PT_SR, PT_PC, | |
64 | /* PT_FP0, ..., PT_FP7 */ | |
65 | 21, 24, 27, 30, 33, 36, 39, 42, | |
66 | /* PT_FPCR, PT_FPSR, PT_FPIAR */ | |
67 | 45, 46, 47 | |
68 | }; | |
69 | ||
0280a90a AS |
70 | /* Which ptrace request retrieves which registers? |
71 | These apply to the corresponding SET requests as well. */ | |
72 | #define NUM_GREGS (18) | |
73 | #define MAX_NUM_REGS (NUM_GREGS + 11) | |
74 | ||
75 | int | |
76 | getregs_supplies (int regno) | |
77 | { | |
78 | return 0 <= regno && regno < NUM_GREGS; | |
79 | } | |
80 | ||
81 | int | |
82 | getfpregs_supplies (int regno) | |
83 | { | |
3e8c568d UW |
84 | return gdbarch_fp0_regnum (current_gdbarch) <= regno |
85 | && regno <= M68K_FPI_REGNUM; | |
0280a90a AS |
86 | } |
87 | ||
88 | /* Does the current host support the GETREGS request? */ | |
89 | int have_ptrace_getregs = | |
90 | #ifdef HAVE_PTRACE_GETREGS | |
91 | 1 | |
92 | #else | |
93 | 0 | |
94 | #endif | |
95 | ; | |
96 | ||
97 | \f | |
98 | ||
0280a90a AS |
99 | /* Fetching registers directly from the U area, one at a time. */ |
100 | ||
101 | /* FIXME: This duplicates code from `inptrace.c'. The problem is that we | |
102 | define FETCH_INFERIOR_REGISTERS since we want to use our own versions | |
103 | of {fetch,store}_inferior_registers that use the GETREGS request. This | |
104 | means that the code in `infptrace.c' is #ifdef'd out. But we need to | |
105 | fall back on that code when GDB is running on top of a kernel that | |
106 | doesn't support the GETREGS request. */ | |
107 | ||
108 | #ifndef PT_READ_U | |
109 | #define PT_READ_U PTRACE_PEEKUSR | |
110 | #endif | |
111 | #ifndef PT_WRITE_U | |
112 | #define PT_WRITE_U PTRACE_POKEUSR | |
113 | #endif | |
114 | ||
0280a90a AS |
115 | /* Fetch one register. */ |
116 | ||
117 | static void | |
56be3814 | 118 | fetch_register (struct regcache *regcache, int regno) |
0280a90a AS |
119 | { |
120 | /* This isn't really an address. But ptrace thinks of it as one. */ | |
121 | CORE_ADDR regaddr; | |
122 | char mess[128]; /* For messages */ | |
52f0bd74 | 123 | int i; |
123a958e | 124 | char buf[MAX_REGISTER_SIZE]; |
0280a90a AS |
125 | int tid; |
126 | ||
8d4c1ba3 | 127 | if (gdbarch_cannot_fetch_register (current_gdbarch, regno)) |
0280a90a | 128 | { |
8de307e0 | 129 | memset (buf, '\0', register_size (current_gdbarch, regno)); /* Supply zeroes */ |
56be3814 | 130 | regcache_raw_supply (regcache, regno, buf); |
0280a90a AS |
131 | return; |
132 | } | |
133 | ||
134 | /* Overload thread id onto process id */ | |
8de307e0 AS |
135 | tid = TIDGET (inferior_ptid); |
136 | if (tid == 0) | |
0280a90a AS |
137 | tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ |
138 | ||
de732108 | 139 | regaddr = 4 * regmap[regno]; |
8de307e0 | 140 | for (i = 0; i < register_size (current_gdbarch, regno); |
5f402660 | 141 | i += sizeof (PTRACE_TYPE_RET)) |
0280a90a AS |
142 | { |
143 | errno = 0; | |
5f402660 UW |
144 | *(PTRACE_TYPE_RET *) &buf[i] = ptrace (PT_READ_U, tid, |
145 | (PTRACE_TYPE_ARG3) regaddr, 0); | |
146 | regaddr += sizeof (PTRACE_TYPE_RET); | |
0280a90a AS |
147 | if (errno != 0) |
148 | { | |
149 | sprintf (mess, "reading register %s (#%d)", | |
c9f4d572 | 150 | gdbarch_register_name (current_gdbarch, regno), regno); |
0280a90a AS |
151 | perror_with_name (mess); |
152 | } | |
153 | } | |
56be3814 | 154 | regcache_raw_supply (regcache, regno, buf); |
0280a90a AS |
155 | } |
156 | ||
157 | /* Fetch register values from the inferior. | |
158 | If REGNO is negative, do this for all registers. | |
159 | Otherwise, REGNO specifies which register (so we can save time). */ | |
c906108c | 160 | |
10d6c8cd | 161 | static void |
56be3814 | 162 | old_fetch_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
163 | { |
164 | if (regno >= 0) | |
165 | { | |
56be3814 | 166 | fetch_register (regcache, regno); |
0280a90a AS |
167 | } |
168 | else | |
169 | { | |
f57d151a | 170 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
0280a90a | 171 | { |
56be3814 | 172 | fetch_register (regcache, regno); |
0280a90a AS |
173 | } |
174 | } | |
175 | } | |
176 | ||
177 | /* Store one register. */ | |
178 | ||
179 | static void | |
56be3814 | 180 | store_register (const struct regcache *regcache, int regno) |
0280a90a AS |
181 | { |
182 | /* This isn't really an address. But ptrace thinks of it as one. */ | |
183 | CORE_ADDR regaddr; | |
184 | char mess[128]; /* For messages */ | |
52f0bd74 | 185 | int i; |
0280a90a | 186 | int tid; |
d9d9c31f | 187 | char buf[MAX_REGISTER_SIZE]; |
0280a90a | 188 | |
8d4c1ba3 UW |
189 | if (gdbarch_cannot_store_register (current_gdbarch, regno)) |
190 | return; | |
0280a90a AS |
191 | |
192 | /* Overload thread id onto process id */ | |
8de307e0 AS |
193 | tid = TIDGET (inferior_ptid); |
194 | if (tid == 0) | |
0280a90a AS |
195 | tid = PIDGET (inferior_ptid); /* no thread id, just use process id */ |
196 | ||
de732108 | 197 | regaddr = 4 * regmap[regno]; |
9852326a AS |
198 | |
199 | /* Put the contents of regno into a local buffer */ | |
56be3814 | 200 | regcache_raw_collect (regcache, regno, buf); |
9852326a AS |
201 | |
202 | /* Store the local buffer into the inferior a chunk at the time. */ | |
8de307e0 | 203 | for (i = 0; i < register_size (current_gdbarch, regno); |
5f402660 | 204 | i += sizeof (PTRACE_TYPE_RET)) |
0280a90a AS |
205 | { |
206 | errno = 0; | |
5f402660 UW |
207 | ptrace (PT_WRITE_U, tid, (PTRACE_TYPE_ARG3) regaddr, |
208 | *(PTRACE_TYPE_RET *) (buf + i)); | |
209 | regaddr += sizeof (PTRACE_TYPE_RET); | |
0280a90a AS |
210 | if (errno != 0) |
211 | { | |
212 | sprintf (mess, "writing register %s (#%d)", | |
c9f4d572 | 213 | gdbarch_register_name (current_gdbarch, regno), regno); |
0280a90a AS |
214 | perror_with_name (mess); |
215 | } | |
216 | } | |
217 | } | |
218 | ||
219 | /* Store our register values back into the inferior. | |
220 | If REGNO is negative, do this for all registers. | |
221 | Otherwise, REGNO specifies which register (so we can save time). */ | |
222 | ||
10d6c8cd | 223 | static void |
56be3814 | 224 | old_store_inferior_registers (const struct regcache *regcache, int regno) |
0280a90a AS |
225 | { |
226 | if (regno >= 0) | |
227 | { | |
56be3814 | 228 | store_register (regcache, regno); |
0280a90a AS |
229 | } |
230 | else | |
231 | { | |
f57d151a | 232 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
0280a90a | 233 | { |
56be3814 | 234 | store_register (regcache, regno); |
0280a90a AS |
235 | } |
236 | } | |
237 | } | |
238 | \f | |
f175af98 DJ |
239 | /* Given a pointer to a general register set in /proc format |
240 | (elf_gregset_t *), unpack the register contents and supply | |
241 | them as gdb's idea of the current register values. */ | |
c906108c | 242 | |
c906108c | 243 | void |
7f7fe91e | 244 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
c906108c | 245 | { |
7f7fe91e | 246 | const elf_greg_t *regp = (const elf_greg_t *) gregsetp; |
c906108c SS |
247 | int regi; |
248 | ||
3e8c568d UW |
249 | for (regi = M68K_D0_REGNUM; |
250 | regi <= gdbarch_sp_regnum (current_gdbarch); | |
251 | regi++) | |
7f7fe91e | 252 | regcache_raw_supply (regcache, regi, ®p[regmap[regi]]); |
3e8c568d UW |
253 | regcache_raw_supply (regcache, gdbarch_ps_regnum (current_gdbarch), |
254 | ®p[PT_SR]); | |
255 | regcache_raw_supply (regcache, | |
256 | gdbarch_pc_regnum (current_gdbarch), ®p[PT_PC]); | |
0280a90a AS |
257 | } |
258 | ||
259 | /* Fill register REGNO (if it is a general-purpose register) in | |
260 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, | |
261 | do this for all registers. */ | |
262 | void | |
7f7fe91e UW |
263 | fill_gregset (const struct regcache *regcache, |
264 | elf_gregset_t *gregsetp, int regno) | |
0280a90a AS |
265 | { |
266 | elf_greg_t *regp = (elf_greg_t *) gregsetp; | |
267 | int i; | |
268 | ||
269 | for (i = 0; i < NUM_GREGS; i++) | |
8de307e0 | 270 | if (regno == -1 || regno == i) |
7f7fe91e | 271 | regcache_raw_collect (regcache, i, regp + regmap[i]); |
0280a90a AS |
272 | } |
273 | ||
274 | #ifdef HAVE_PTRACE_GETREGS | |
275 | ||
276 | /* Fetch all general-purpose registers from process/thread TID and | |
277 | store their values in GDB's register array. */ | |
278 | ||
279 | static void | |
56be3814 | 280 | fetch_regs (struct regcache *regcache, int tid) |
0280a90a AS |
281 | { |
282 | elf_gregset_t regs; | |
283 | ||
284 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
285 | { | |
286 | if (errno == EIO) | |
287 | { | |
288 | /* The kernel we're running on doesn't support the GETREGS | |
289 | request. Reset `have_ptrace_getregs'. */ | |
290 | have_ptrace_getregs = 0; | |
291 | return; | |
292 | } | |
293 | ||
e2e0b3e5 | 294 | perror_with_name (_("Couldn't get registers")); |
0280a90a AS |
295 | } |
296 | ||
56be3814 | 297 | supply_gregset (regcache, (const elf_gregset_t *) ®s); |
c906108c SS |
298 | } |
299 | ||
0280a90a AS |
300 | /* Store all valid general-purpose registers in GDB's register array |
301 | into the process/thread specified by TID. */ | |
302 | ||
303 | static void | |
56be3814 | 304 | store_regs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
305 | { |
306 | elf_gregset_t regs; | |
307 | ||
308 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 309 | perror_with_name (_("Couldn't get registers")); |
0280a90a | 310 | |
56be3814 | 311 | fill_gregset (regcache, ®s, regno); |
0280a90a AS |
312 | |
313 | if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 314 | perror_with_name (_("Couldn't write registers")); |
0280a90a AS |
315 | } |
316 | ||
317 | #else | |
318 | ||
56be3814 UW |
319 | static void fetch_regs (struct regcache *regcache, int tid) {} |
320 | static void store_regs (const struct regcache *regcache, int tid, int regno) {} | |
0280a90a AS |
321 | |
322 | #endif | |
323 | ||
324 | \f | |
325 | /* Transfering floating-point registers between GDB, inferiors and cores. */ | |
326 | ||
327 | /* What is the address of fpN within the floating-point register set F? */ | |
7f7fe91e | 328 | #define FPREG_ADDR(f, n) (&(f)->fpregs[(n) * 3]) |
0280a90a AS |
329 | |
330 | /* Fill GDB's register array with the floating-point register values in | |
331 | *FPREGSETP. */ | |
c906108c | 332 | |
c5aa993b | 333 | void |
7f7fe91e | 334 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
c906108c SS |
335 | { |
336 | int regi; | |
337 | ||
3e8c568d UW |
338 | for (regi = gdbarch_fp0_regnum (current_gdbarch); |
339 | regi < gdbarch_fp0_regnum (current_gdbarch) + 8; regi++) | |
7f7fe91e | 340 | regcache_raw_supply (regcache, regi, |
3e8c568d UW |
341 | FPREG_ADDR (fpregsetp, |
342 | regi - gdbarch_fp0_regnum | |
343 | (current_gdbarch))); | |
7f7fe91e UW |
344 | regcache_raw_supply (regcache, M68K_FPC_REGNUM, &fpregsetp->fpcntl[0]); |
345 | regcache_raw_supply (regcache, M68K_FPS_REGNUM, &fpregsetp->fpcntl[1]); | |
346 | regcache_raw_supply (regcache, M68K_FPI_REGNUM, &fpregsetp->fpcntl[2]); | |
c906108c SS |
347 | } |
348 | ||
0280a90a AS |
349 | /* Fill register REGNO (if it is a floating-point register) in |
350 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, | |
351 | do this for all registers. */ | |
352 | ||
353 | void | |
7f7fe91e UW |
354 | fill_fpregset (const struct regcache *regcache, |
355 | elf_fpregset_t *fpregsetp, int regno) | |
0280a90a AS |
356 | { |
357 | int i; | |
358 | ||
359 | /* Fill in the floating-point registers. */ | |
3e8c568d UW |
360 | for (i = gdbarch_fp0_regnum (current_gdbarch); |
361 | i < gdbarch_fp0_regnum (current_gdbarch) + 8; i++) | |
0280a90a | 362 | if (regno == -1 || regno == i) |
7f7fe91e | 363 | regcache_raw_collect (regcache, i, |
3e8c568d UW |
364 | FPREG_ADDR (fpregsetp, |
365 | i - gdbarch_fp0_regnum | |
366 | (current_gdbarch))); | |
0280a90a AS |
367 | |
368 | /* Fill in the floating-point control registers. */ | |
32eeb91a | 369 | for (i = M68K_FPC_REGNUM; i <= M68K_FPI_REGNUM; i++) |
0280a90a | 370 | if (regno == -1 || regno == i) |
7f7fe91e UW |
371 | regcache_raw_collect (regcache, i, |
372 | &fpregsetp->fpcntl[i - M68K_FPC_REGNUM]); | |
0280a90a AS |
373 | } |
374 | ||
375 | #ifdef HAVE_PTRACE_GETREGS | |
376 | ||
377 | /* Fetch all floating-point registers from process/thread TID and store | |
378 | thier values in GDB's register array. */ | |
379 | ||
380 | static void | |
56be3814 | 381 | fetch_fpregs (struct regcache *regcache, int tid) |
0280a90a AS |
382 | { |
383 | elf_fpregset_t fpregs; | |
384 | ||
385 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 386 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 387 | |
56be3814 | 388 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs); |
0280a90a AS |
389 | } |
390 | ||
391 | /* Store all valid floating-point registers in GDB's register array | |
392 | into the process/thread specified by TID. */ | |
393 | ||
394 | static void | |
56be3814 | 395 | store_fpregs (const struct regcache *regcache, int tid, int regno) |
0280a90a AS |
396 | { |
397 | elf_fpregset_t fpregs; | |
398 | ||
399 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 400 | perror_with_name (_("Couldn't get floating point status")); |
0280a90a | 401 | |
56be3814 | 402 | fill_fpregset (regcache, &fpregs, regno); |
0280a90a AS |
403 | |
404 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0) | |
e2e0b3e5 | 405 | perror_with_name (_("Couldn't write floating point status")); |
0280a90a AS |
406 | } |
407 | ||
408 | #else | |
409 | ||
56be3814 UW |
410 | static void fetch_fpregs (struct regcache *regcache, int tid) {} |
411 | static void store_fpregs (const struct regcache *regcache, int tid, int regno) {} | |
0280a90a | 412 | |
c906108c | 413 | #endif |
0280a90a AS |
414 | \f |
415 | /* Transferring arbitrary registers between GDB and inferior. */ | |
416 | ||
417 | /* Fetch register REGNO from the child process. If REGNO is -1, do | |
418 | this for all registers (including the floating point and SSE | |
419 | registers). */ | |
420 | ||
10d6c8cd | 421 | static void |
56be3814 | 422 | m68k_linux_fetch_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
423 | { |
424 | int tid; | |
425 | ||
426 | /* Use the old method of peeking around in `struct user' if the | |
427 | GETREGS request isn't available. */ | |
428 | if (! have_ptrace_getregs) | |
429 | { | |
56be3814 | 430 | old_fetch_inferior_registers (regcache, regno); |
0280a90a AS |
431 | return; |
432 | } | |
433 | ||
a4b6fc86 | 434 | /* GNU/Linux LWP ID's are process ID's. */ |
8de307e0 AS |
435 | tid = TIDGET (inferior_ptid); |
436 | if (tid == 0) | |
0280a90a | 437 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
f175af98 | 438 | |
0280a90a AS |
439 | /* Use the PTRACE_GETFPXREGS request whenever possible, since it |
440 | transfers more registers in one system call, and we'll cache the | |
441 | results. But remember that fetch_fpxregs can fail, and return | |
442 | zero. */ | |
443 | if (regno == -1) | |
444 | { | |
56be3814 | 445 | fetch_regs (regcache, tid); |
0280a90a AS |
446 | |
447 | /* The call above might reset `have_ptrace_getregs'. */ | |
448 | if (! have_ptrace_getregs) | |
449 | { | |
56be3814 | 450 | old_fetch_inferior_registers (regcache, -1); |
0280a90a AS |
451 | return; |
452 | } | |
453 | ||
56be3814 | 454 | fetch_fpregs (regcache, tid); |
0280a90a AS |
455 | return; |
456 | } | |
457 | ||
458 | if (getregs_supplies (regno)) | |
459 | { | |
56be3814 | 460 | fetch_regs (regcache, tid); |
0280a90a AS |
461 | return; |
462 | } | |
463 | ||
464 | if (getfpregs_supplies (regno)) | |
465 | { | |
56be3814 | 466 | fetch_fpregs (regcache, tid); |
0280a90a AS |
467 | return; |
468 | } | |
469 | ||
470 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 471 | _("Got request for bad register number %d."), regno); |
0280a90a AS |
472 | } |
473 | ||
474 | /* Store register REGNO back into the child process. If REGNO is -1, | |
475 | do this for all registers (including the floating point and SSE | |
476 | registers). */ | |
10d6c8cd | 477 | static void |
56be3814 | 478 | m68k_linux_store_inferior_registers (struct regcache *regcache, int regno) |
0280a90a AS |
479 | { |
480 | int tid; | |
481 | ||
482 | /* Use the old method of poking around in `struct user' if the | |
483 | SETREGS request isn't available. */ | |
484 | if (! have_ptrace_getregs) | |
485 | { | |
56be3814 | 486 | old_store_inferior_registers (regcache, regno); |
0280a90a AS |
487 | return; |
488 | } | |
489 | ||
a4b6fc86 | 490 | /* GNU/Linux LWP ID's are process ID's. */ |
8de307e0 AS |
491 | tid = TIDGET (inferior_ptid); |
492 | if (tid == 0) | |
0280a90a AS |
493 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ |
494 | ||
495 | /* Use the PTRACE_SETFPREGS requests whenever possible, since it | |
496 | transfers more registers in one system call. But remember that | |
497 | store_fpregs can fail, and return zero. */ | |
498 | if (regno == -1) | |
499 | { | |
56be3814 UW |
500 | store_regs (regcache, tid, regno); |
501 | store_fpregs (regcache, tid, regno); | |
0280a90a AS |
502 | return; |
503 | } | |
504 | ||
505 | if (getregs_supplies (regno)) | |
506 | { | |
56be3814 | 507 | store_regs (regcache, tid, regno); |
0280a90a AS |
508 | return; |
509 | } | |
510 | ||
511 | if (getfpregs_supplies (regno)) | |
512 | { | |
56be3814 | 513 | store_fpregs (regcache, tid, regno); |
0280a90a AS |
514 | return; |
515 | } | |
516 | ||
517 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 518 | _("Got request to store bad register number %d."), regno); |
0280a90a | 519 | } |
f175af98 DJ |
520 | \f |
521 | /* Interpreting register set info found in core files. */ | |
522 | ||
523 | /* Provide registers to GDB from a core file. | |
524 | ||
525 | (We can't use the generic version of this function in | |
526 | core-regset.c, because we need to use elf_gregset_t instead of | |
527 | gregset_t.) | |
528 | ||
529 | CORE_REG_SECT points to an array of bytes, which are the contents | |
530 | of a `note' from a core file which BFD thinks might contain | |
531 | register contents. CORE_REG_SIZE is its size. | |
532 | ||
533 | WHICH says which register set corelow suspects this is: | |
534 | 0 --- the general-purpose register set, in elf_gregset_t format | |
535 | 2 --- the floating-point register set, in elf_fpregset_t format | |
536 | ||
a4b6fc86 | 537 | REG_ADDR isn't used on GNU/Linux. */ |
f175af98 DJ |
538 | |
539 | static void | |
9eefc95f UW |
540 | fetch_core_registers (struct regcache *regcache, |
541 | char *core_reg_sect, unsigned core_reg_size, | |
f175af98 DJ |
542 | int which, CORE_ADDR reg_addr) |
543 | { | |
544 | elf_gregset_t gregset; | |
545 | elf_fpregset_t fpregset; | |
546 | ||
547 | switch (which) | |
548 | { | |
549 | case 0: | |
550 | if (core_reg_size != sizeof (gregset)) | |
8a3fe4f8 | 551 | warning (_("Wrong size gregset in core file.")); |
f175af98 DJ |
552 | else |
553 | { | |
554 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); | |
9eefc95f | 555 | supply_gregset (regcache, (const elf_gregset_t *) &gregset); |
f175af98 DJ |
556 | } |
557 | break; | |
558 | ||
559 | case 2: | |
560 | if (core_reg_size != sizeof (fpregset)) | |
8a3fe4f8 | 561 | warning (_("Wrong size fpregset in core file.")); |
f175af98 DJ |
562 | else |
563 | { | |
564 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); | |
9eefc95f | 565 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregset); |
f175af98 DJ |
566 | } |
567 | break; | |
568 | ||
569 | default: | |
570 | /* We've covered all the kinds of registers we know about here, | |
571 | so this must be something we wouldn't know what to do with | |
572 | anyway. Just ignore it. */ | |
573 | break; | |
574 | } | |
575 | } | |
c906108c | 576 | \f |
c5aa993b | 577 | |
a4b6fc86 AC |
578 | /* Register that we are able to handle GNU/Linux ELF core file |
579 | formats. */ | |
f175af98 DJ |
580 | |
581 | static struct core_fns linux_elf_core_fns = | |
582 | { | |
583 | bfd_target_elf_flavour, /* core_flavour */ | |
584 | default_check_format, /* check_format */ | |
585 | default_core_sniffer, /* core_sniffer */ | |
586 | fetch_core_registers, /* core_read_registers */ | |
587 | NULL /* next */ | |
588 | }; | |
589 | ||
10d6c8cd DJ |
590 | void _initialize_m68k_linux_nat (void); |
591 | ||
f175af98 | 592 | void |
5ae5f592 | 593 | _initialize_m68k_linux_nat (void) |
f175af98 | 594 | { |
10d6c8cd DJ |
595 | struct target_ops *t; |
596 | ||
597 | /* Fill in the generic GNU/Linux methods. */ | |
598 | t = linux_target (); | |
599 | ||
600 | /* Add our register access methods. */ | |
601 | t->to_fetch_registers = m68k_linux_fetch_inferior_registers; | |
602 | t->to_store_registers = m68k_linux_store_inferior_registers; | |
603 | ||
604 | /* Register the target. */ | |
f973ed9c | 605 | linux_nat_add_target (t); |
10d6c8cd | 606 | |
00e32a35 | 607 | deprecated_add_core_fns (&linux_elf_core_fns); |
f175af98 | 608 | } |