Commit | Line | Data |
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d4f3574e | 1 | /* Native-dependent code for Linux running on i386's, for GDB. |
ed40e7af | 2 | Copyright (C) 1999, 2000 Free Software Foundation, Inc. |
d4f3574e | 3 | |
04cd15b6 | 4 | This file is part of GDB. |
d4f3574e | 5 | |
04cd15b6 MK |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
d4f3574e | 10 | |
04cd15b6 MK |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
d4f3574e | 15 | |
04cd15b6 MK |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
d4f3574e SS |
20 | |
21 | #include "defs.h" | |
22 | #include "inferior.h" | |
23 | #include "gdbcore.h" | |
24 | ||
04cd15b6 | 25 | /* For i386_linux_skip_solib_resolver. */ |
d4f3574e | 26 | #include "symtab.h" |
d4f3574e SS |
27 | #include "symfile.h" |
28 | #include "objfiles.h" | |
29 | ||
30 | #include <sys/ptrace.h> | |
31 | #include <sys/user.h> | |
32 | #include <sys/procfs.h> | |
33 | ||
34 | #ifdef HAVE_SYS_REG_H | |
35 | #include <sys/reg.h> | |
36 | #endif | |
37 | ||
04cd15b6 MK |
38 | /* On Linux, threads are implemented as pseudo-processes, in which |
39 | case we may be tracing more than one process at a time. In that | |
40 | case, inferior_pid will contain the main process ID and the | |
41 | individual thread (process) ID mashed together. These macros are | |
42 | used to separate them out. These definitions should be overridden | |
43 | if thread support is included. */ | |
ed9a39eb JM |
44 | |
45 | #if !defined (PIDGET) /* Default definition for PIDGET/TIDGET. */ | |
46 | #define PIDGET(PID) PID | |
47 | #define TIDGET(PID) 0 | |
48 | #endif | |
49 | ||
d4f3574e | 50 | |
04cd15b6 MK |
51 | /* The register sets used in Linux ELF core-dumps are identical to the |
52 | register sets in `struct user' that is used for a.out core-dumps, | |
53 | and is also used by `ptrace'. The corresponding types are | |
54 | `elf_gregset_t' for the general-purpose registers (with | |
55 | `elf_greg_t' the type of a single GP register) and `elf_fpregset_t' | |
56 | for the floating-point registers. | |
57 | ||
58 | Those types used to be available under the names `gregset_t' and | |
59 | `fpregset_t' too, and this file used those names in the past. But | |
60 | those names are now used for the register sets used in the | |
61 | `mcontext_t' type, and have a different size and layout. */ | |
62 | ||
63 | /* Mapping between the general-purpose registers in `struct user' | |
64 | format and GDB's register array layout. */ | |
d4f3574e SS |
65 | static int regmap[] = |
66 | { | |
67 | EAX, ECX, EDX, EBX, | |
68 | UESP, EBP, ESI, EDI, | |
69 | EIP, EFL, CS, SS, | |
04cd15b6 | 70 | DS, ES, FS, GS |
d4f3574e SS |
71 | }; |
72 | ||
5c44784c JM |
73 | /* Which ptrace request retrieves which registers? |
74 | These apply to the corresponding SET requests as well. */ | |
75 | #define GETREGS_SUPPLIES(regno) \ | |
76 | (0 <= (regno) && (regno) <= 15) | |
77 | #define GETFPREGS_SUPPLIES(regno) \ | |
78 | (FP0_REGNUM <= (regno) && (regno) <= LAST_FPU_CTRL_REGNUM) | |
79 | #define GETXFPREGS_SUPPLIES(regno) \ | |
80 | (FP0_REGNUM <= (regno) && (regno) <= MXCSR_REGNUM) | |
81 | ||
f60300e7 MK |
82 | /* Does the current host support the GETREGS request? */ |
83 | int have_ptrace_getregs = | |
84 | #ifdef HAVE_PTRACE_GETREGS | |
85 | 1 | |
86 | #else | |
87 | 0 | |
88 | #endif | |
89 | ; | |
90 | ||
5c44784c JM |
91 | /* Does the current host support the GETXFPREGS request? The header |
92 | file may or may not define it, and even if it is defined, the | |
93 | kernel will return EIO if it's running on a pre-SSE processor. | |
94 | ||
c2d11a7d JM |
95 | PTRACE_GETXFPREGS is a Cygnus invention, since we wrote our own |
96 | Linux kernel patch for SSE support. That patch may or may not | |
97 | actually make it into the official distribution. If you find that | |
98 | years have gone by since this stuff was added, and Linux isn't | |
99 | using PTRACE_GETXFPREGS, that means that our patch didn't make it, | |
100 | and you can delete this, and the related code. | |
101 | ||
5c44784c JM |
102 | My instinct is to attach this to some architecture- or |
103 | target-specific data structure, but really, a particular GDB | |
104 | process can only run on top of one kernel at a time. So it's okay | |
105 | for this to be a simple variable. */ | |
106 | int have_ptrace_getxfpregs = | |
107 | #ifdef HAVE_PTRACE_GETXFPREGS | |
108 | 1 | |
109 | #else | |
110 | 0 | |
111 | #endif | |
112 | ; | |
113 | ||
f60300e7 | 114 | \f |
97780f5f JB |
115 | /* Fetching registers directly from the U area, one at a time. */ |
116 | ||
f60300e7 MK |
117 | /* FIXME: kettenis/2000-03-05: This duplicates code from `inptrace.c'. |
118 | The problem is that we define FETCH_INFERIOR_REGISTERS since we | |
119 | want to use our own versions of {fetch,store}_inferior_registers | |
120 | that use the GETREGS request. This means that the code in | |
121 | `infptrace.c' is #ifdef'd out. But we need to fall back on that | |
122 | code when GDB is running on top of a kernel that doesn't support | |
123 | the GETREGS request. I want to avoid changing `infptrace.c' right | |
124 | now. */ | |
125 | ||
126 | /* Default the type of the ptrace transfer to int. */ | |
127 | #ifndef PTRACE_XFER_TYPE | |
128 | #define PTRACE_XFER_TYPE int | |
129 | #endif | |
130 | ||
131 | /* Registers we shouldn't try to fetch. */ | |
132 | #if !defined (CANNOT_FETCH_REGISTER) | |
133 | #define CANNOT_FETCH_REGISTER(regno) 0 | |
134 | #endif | |
135 | ||
136 | /* Fetch one register. */ | |
137 | ||
138 | static void | |
139 | fetch_register (regno) | |
140 | int regno; | |
141 | { | |
142 | /* This isn't really an address. But ptrace thinks of it as one. */ | |
143 | CORE_ADDR regaddr; | |
144 | char mess[128]; /* For messages */ | |
145 | register int i; | |
146 | unsigned int offset; /* Offset of registers within the u area. */ | |
147 | char buf[MAX_REGISTER_RAW_SIZE]; | |
148 | int tid; | |
149 | ||
150 | if (CANNOT_FETCH_REGISTER (regno)) | |
151 | { | |
152 | memset (buf, '\0', REGISTER_RAW_SIZE (regno)); /* Supply zeroes */ | |
153 | supply_register (regno, buf); | |
154 | return; | |
155 | } | |
156 | ||
157 | /* Overload thread id onto process id */ | |
158 | if ((tid = TIDGET (inferior_pid)) == 0) | |
159 | tid = inferior_pid; /* no thread id, just use process id */ | |
160 | ||
161 | offset = U_REGS_OFFSET; | |
162 | ||
163 | regaddr = register_addr (regno, offset); | |
164 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) | |
165 | { | |
166 | errno = 0; | |
167 | *(PTRACE_XFER_TYPE *) & buf[i] = ptrace (PT_READ_U, tid, | |
168 | (PTRACE_ARG3_TYPE) regaddr, 0); | |
169 | regaddr += sizeof (PTRACE_XFER_TYPE); | |
170 | if (errno != 0) | |
171 | { | |
172 | sprintf (mess, "reading register %s (#%d)", | |
173 | REGISTER_NAME (regno), regno); | |
174 | perror_with_name (mess); | |
175 | } | |
176 | } | |
177 | supply_register (regno, buf); | |
178 | } | |
179 | ||
180 | /* Fetch register values from the inferior. | |
181 | If REGNO is negative, do this for all registers. | |
182 | Otherwise, REGNO specifies which register (so we can save time). */ | |
183 | ||
184 | void | |
185 | old_fetch_inferior_registers (regno) | |
186 | int regno; | |
187 | { | |
188 | if (regno >= 0) | |
189 | { | |
190 | fetch_register (regno); | |
191 | } | |
192 | else | |
193 | { | |
194 | for (regno = 0; regno < ARCH_NUM_REGS; regno++) | |
195 | { | |
196 | fetch_register (regno); | |
197 | } | |
198 | } | |
199 | } | |
200 | ||
201 | /* Registers we shouldn't try to store. */ | |
202 | #if !defined (CANNOT_STORE_REGISTER) | |
203 | #define CANNOT_STORE_REGISTER(regno) 0 | |
204 | #endif | |
205 | ||
206 | /* Store one register. */ | |
207 | ||
208 | static void | |
209 | store_register (regno) | |
210 | int regno; | |
211 | { | |
212 | /* This isn't really an address. But ptrace thinks of it as one. */ | |
213 | CORE_ADDR regaddr; | |
214 | char mess[128]; /* For messages */ | |
215 | register int i; | |
216 | unsigned int offset; /* Offset of registers within the u area. */ | |
217 | int tid; | |
218 | ||
219 | if (CANNOT_STORE_REGISTER (regno)) | |
220 | { | |
221 | return; | |
222 | } | |
223 | ||
224 | /* Overload thread id onto process id */ | |
225 | if ((tid = TIDGET (inferior_pid)) == 0) | |
226 | tid = inferior_pid; /* no thread id, just use process id */ | |
227 | ||
228 | offset = U_REGS_OFFSET; | |
229 | ||
230 | regaddr = register_addr (regno, offset); | |
231 | for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (PTRACE_XFER_TYPE)) | |
232 | { | |
233 | errno = 0; | |
234 | ptrace (PT_WRITE_U, tid, (PTRACE_ARG3_TYPE) regaddr, | |
235 | *(PTRACE_XFER_TYPE *) & registers[REGISTER_BYTE (regno) + i]); | |
236 | regaddr += sizeof (PTRACE_XFER_TYPE); | |
237 | if (errno != 0) | |
238 | { | |
239 | sprintf (mess, "writing register %s (#%d)", | |
240 | REGISTER_NAME (regno), regno); | |
241 | perror_with_name (mess); | |
242 | } | |
243 | } | |
244 | } | |
245 | ||
246 | /* Store our register values back into the inferior. | |
247 | If REGNO is negative, do this for all registers. | |
248 | Otherwise, REGNO specifies which register (so we can save time). */ | |
249 | ||
250 | void | |
251 | old_store_inferior_registers (regno) | |
252 | int regno; | |
253 | { | |
254 | if (regno >= 0) | |
255 | { | |
256 | store_register (regno); | |
257 | } | |
258 | else | |
259 | { | |
260 | for (regno = 0; regno < ARCH_NUM_REGS; regno++) | |
261 | { | |
262 | store_register (regno); | |
263 | } | |
264 | } | |
265 | } | |
266 | ||
5c44784c | 267 | \f |
04cd15b6 MK |
268 | /* Transfering the general-purpose registers between GDB, inferiors |
269 | and core files. */ | |
270 | ||
271 | /* Fill GDB's register array with the genereal-purpose register values | |
272 | in *GREGSETP. */ | |
5c44784c | 273 | |
d4f3574e | 274 | void |
04cd15b6 | 275 | supply_gregset (elf_gregset_t *gregsetp) |
d4f3574e | 276 | { |
04cd15b6 MK |
277 | elf_greg_t *regp = (elf_greg_t *) gregsetp; |
278 | int regi; | |
d4f3574e | 279 | |
917317f4 | 280 | for (regi = 0; regi < NUM_GREGS; regi++) |
04cd15b6 | 281 | supply_register (regi, (char *) (regp + regmap[regi])); |
d4f3574e SS |
282 | } |
283 | ||
04cd15b6 MK |
284 | /* Convert the valid general-purpose register values in GDB's register |
285 | array to `struct user' format and store them in *GREGSETP. The | |
286 | array VALID indicates which register values are valid. If VALID is | |
287 | NULL, all registers are assumed to be valid. */ | |
5c44784c | 288 | |
04cd15b6 MK |
289 | static void |
290 | convert_to_gregset (elf_gregset_t *gregsetp, signed char *valid) | |
d4f3574e | 291 | { |
04cd15b6 | 292 | elf_greg_t *regp = (elf_greg_t *) gregsetp; |
d4f3574e | 293 | int regi; |
d4f3574e | 294 | |
917317f4 JM |
295 | for (regi = 0; regi < NUM_GREGS; regi++) |
296 | if (! valid || valid[regi]) | |
297 | *(regp + regmap[regi]) = * (int *) ®isters[REGISTER_BYTE (regi)]; | |
298 | } | |
299 | ||
04cd15b6 MK |
300 | /* Fill register REGNO (if it is a general-purpose register) in |
301 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, | |
302 | do this for all registers. */ | |
917317f4 | 303 | void |
04cd15b6 | 304 | fill_gregset (elf_gregset_t *gregsetp, int regno) |
917317f4 JM |
305 | { |
306 | if (regno == -1) | |
04cd15b6 MK |
307 | { |
308 | convert_to_gregset (gregsetp, NULL); | |
309 | return; | |
310 | } | |
311 | ||
312 | if (GETREGS_SUPPLIES (regno)) | |
d4f3574e | 313 | { |
917317f4 | 314 | signed char valid[NUM_GREGS]; |
04cd15b6 | 315 | |
917317f4 JM |
316 | memset (valid, 0, sizeof (valid)); |
317 | valid[regno] = 1; | |
04cd15b6 MK |
318 | |
319 | convert_to_gregset (gregsetp, valid); | |
d4f3574e SS |
320 | } |
321 | } | |
322 | ||
f60300e7 MK |
323 | #ifdef HAVE_PTRACE_GETREGS |
324 | ||
04cd15b6 MK |
325 | /* Fetch all general-purpose registers from process/thread TID and |
326 | store their values in GDB's register array. */ | |
d4f3574e | 327 | |
5c44784c | 328 | static void |
ed9a39eb | 329 | fetch_regs (int tid) |
5c44784c | 330 | { |
04cd15b6 MK |
331 | elf_gregset_t regs; |
332 | int ret; | |
5c44784c | 333 | |
04cd15b6 | 334 | ret = ptrace (PTRACE_GETREGS, tid, 0, (int) ®s); |
5c44784c JM |
335 | if (ret < 0) |
336 | { | |
f60300e7 MK |
337 | if (errno == EIO) |
338 | { | |
339 | /* The kernel we're running on doesn't support the GETREGS | |
340 | request. Reset `have_ptrace_getregs'. */ | |
341 | have_ptrace_getregs = 0; | |
342 | return; | |
343 | } | |
344 | ||
04cd15b6 | 345 | warning ("Couldn't get registers."); |
5c44784c JM |
346 | return; |
347 | } | |
348 | ||
04cd15b6 | 349 | supply_gregset (®s); |
5c44784c JM |
350 | } |
351 | ||
04cd15b6 MK |
352 | /* Store all valid general-purpose registers in GDB's register array |
353 | into the process/thread specified by TID. */ | |
5c44784c | 354 | |
5c44784c | 355 | static void |
ed9a39eb | 356 | store_regs (int tid) |
5c44784c | 357 | { |
04cd15b6 MK |
358 | elf_gregset_t regs; |
359 | int ret; | |
5c44784c | 360 | |
04cd15b6 | 361 | ret = ptrace (PTRACE_GETREGS, tid, 0, (int) ®s); |
5c44784c JM |
362 | if (ret < 0) |
363 | { | |
04cd15b6 | 364 | warning ("Couldn't get registers."); |
5c44784c JM |
365 | return; |
366 | } | |
367 | ||
04cd15b6 | 368 | convert_to_gregset (®s, register_valid); |
5c44784c | 369 | |
04cd15b6 | 370 | ret = ptrace (PTRACE_SETREGS, tid, 0, (int) ®s); |
5c44784c JM |
371 | if (ret < 0) |
372 | { | |
04cd15b6 | 373 | warning ("Couldn't write registers."); |
5c44784c JM |
374 | return; |
375 | } | |
376 | } | |
377 | ||
f60300e7 MK |
378 | #else |
379 | ||
380 | static void fetch_regs (int tid) {} | |
381 | static void store_regs (int tid) {} | |
382 | ||
383 | #endif | |
384 | ||
5c44784c JM |
385 | \f |
386 | /* Transfering floating-point registers between GDB, inferiors and cores. */ | |
387 | ||
04cd15b6 MK |
388 | /* What is the address of st(N) within the floating-point register set F? */ |
389 | #define FPREG_ADDR(f, n) ((char *) &(f)->st_space + (n) * 10) | |
d4f3574e | 390 | |
04cd15b6 | 391 | /* Fill GDB's register array with the floating-point register values in |
917317f4 | 392 | *FPREGSETP. */ |
04cd15b6 | 393 | |
d4f3574e | 394 | void |
04cd15b6 | 395 | supply_fpregset (elf_fpregset_t *fpregsetp) |
d4f3574e | 396 | { |
04cd15b6 | 397 | int reg; |
b948cda9 | 398 | long l; |
917317f4 JM |
399 | |
400 | /* Supply the floating-point registers. */ | |
04cd15b6 MK |
401 | for (reg = 0; reg < 8; reg++) |
402 | supply_register (FP0_REGNUM + reg, FPREG_ADDR (fpregsetp, reg)); | |
917317f4 | 403 | |
b948cda9 MK |
404 | /* We have to mask off the reserved bits in *FPREGSETP before |
405 | storing the values in GDB's register file. */ | |
406 | #define supply(REGNO, MEMBER) \ | |
407 | l = fpregsetp->MEMBER & 0xffff; \ | |
408 | supply_register (REGNO, (char *) &l) | |
409 | ||
410 | supply (FCTRL_REGNUM, cwd); | |
411 | supply (FSTAT_REGNUM, swd); | |
412 | supply (FTAG_REGNUM, twd); | |
917317f4 | 413 | supply_register (FCOFF_REGNUM, (char *) &fpregsetp->fip); |
b948cda9 | 414 | supply (FDS_REGNUM, fos); |
917317f4 | 415 | supply_register (FDOFF_REGNUM, (char *) &fpregsetp->foo); |
917317f4 | 416 | |
b948cda9 MK |
417 | #undef supply |
418 | ||
419 | /* Extract the code segment and opcode from the "fcs" member. */ | |
420 | l = fpregsetp->fcs & 0xffff; | |
421 | supply_register (FCS_REGNUM, (char *) &l); | |
917317f4 | 422 | |
b948cda9 MK |
423 | l = (fpregsetp->fcs >> 16) & ((1 << 11) - 1); |
424 | supply_register (FOP_REGNUM, (char *) &l); | |
d4f3574e SS |
425 | } |
426 | ||
04cd15b6 MK |
427 | /* Convert the valid floating-point register values in GDB's register |
428 | array to `struct user' format and store them in *FPREGSETP. The | |
429 | array VALID indicates which register values are valid. If VALID is | |
430 | NULL, all registers are assumed to be valid. */ | |
d4f3574e | 431 | |
04cd15b6 MK |
432 | static void |
433 | convert_to_fpregset (elf_fpregset_t *fpregsetp, signed char *valid) | |
d4f3574e | 434 | { |
04cd15b6 | 435 | int reg; |
917317f4 JM |
436 | |
437 | /* Fill in the floating-point registers. */ | |
04cd15b6 MK |
438 | for (reg = 0; reg < 8; reg++) |
439 | if (!valid || valid[reg]) | |
440 | memcpy (FPREG_ADDR (fpregsetp, reg), | |
441 | ®isters[REGISTER_BYTE (FP0_REGNUM + reg)], | |
442 | REGISTER_RAW_SIZE(FP0_REGNUM + reg)); | |
917317f4 | 443 | |
b948cda9 MK |
444 | /* We're not supposed to touch the reserved bits in *FPREGSETP. */ |
445 | ||
917317f4 JM |
446 | #define fill(MEMBER, REGNO) \ |
447 | if (! valid || valid[(REGNO)]) \ | |
b948cda9 MK |
448 | fpregsetp->MEMBER \ |
449 | = ((fpregsetp->MEMBER & ~0xffff) \ | |
450 | | (* (int *) ®isters[REGISTER_BYTE (REGNO)] & 0xffff)) | |
451 | ||
452 | #define fill_register(MEMBER, REGNO) \ | |
453 | if (! valid || valid[(REGNO)]) \ | |
454 | memcpy (&fpregsetp->MEMBER, ®isters[REGISTER_BYTE (REGNO)], \ | |
455 | sizeof (fpregsetp->MEMBER)) | |
917317f4 JM |
456 | |
457 | fill (cwd, FCTRL_REGNUM); | |
458 | fill (swd, FSTAT_REGNUM); | |
459 | fill (twd, FTAG_REGNUM); | |
b948cda9 | 460 | fill_register (fip, FCOFF_REGNUM); |
917317f4 | 461 | fill (foo, FDOFF_REGNUM); |
b948cda9 | 462 | fill_register (fos, FDS_REGNUM); |
917317f4 JM |
463 | |
464 | #undef fill | |
b948cda9 | 465 | #undef fill_register |
917317f4 JM |
466 | |
467 | if (! valid || valid[FCS_REGNUM]) | |
468 | fpregsetp->fcs | |
469 | = ((fpregsetp->fcs & ~0xffff) | |
470 | | (* (int *) ®isters[REGISTER_BYTE (FCS_REGNUM)] & 0xffff)); | |
471 | ||
472 | if (! valid || valid[FOP_REGNUM]) | |
473 | fpregsetp->fcs | |
474 | = ((fpregsetp->fcs & 0xffff) | |
475 | | ((*(int *) ®isters[REGISTER_BYTE (FOP_REGNUM)] & ((1 << 11) - 1)) | |
476 | << 16)); | |
477 | } | |
d4f3574e | 478 | |
04cd15b6 MK |
479 | /* Fill register REGNO (if it is a floating-point register) in |
480 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, | |
481 | do this for all registers. */ | |
917317f4 JM |
482 | |
483 | void | |
04cd15b6 | 484 | fill_fpregset (elf_fpregset_t *fpregsetp, int regno) |
917317f4 | 485 | { |
04cd15b6 MK |
486 | if (regno == -1) |
487 | { | |
488 | convert_to_fpregset (fpregsetp, NULL); | |
489 | return; | |
490 | } | |
491 | ||
492 | if (GETFPREGS_SUPPLIES(regno)) | |
493 | { | |
494 | signed char valid[MAX_NUM_REGS]; | |
495 | ||
496 | memset (valid, 0, sizeof (valid)); | |
497 | valid[regno] = 1; | |
498 | ||
499 | convert_to_fpregset (fpregsetp, valid); | |
500 | } | |
d4f3574e SS |
501 | } |
502 | ||
f60300e7 MK |
503 | #ifdef HAVE_PTRACE_GETREGS |
504 | ||
04cd15b6 MK |
505 | /* Fetch all floating-point registers from process/thread TID and store |
506 | thier values in GDB's register array. */ | |
917317f4 | 507 | |
d4f3574e | 508 | static void |
ed9a39eb | 509 | fetch_fpregs (int tid) |
d4f3574e | 510 | { |
04cd15b6 MK |
511 | elf_fpregset_t fpregs; |
512 | int ret; | |
d4f3574e | 513 | |
04cd15b6 | 514 | ret = ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs); |
917317f4 | 515 | if (ret < 0) |
d4f3574e | 516 | { |
04cd15b6 | 517 | warning ("Couldn't get floating point status."); |
d4f3574e SS |
518 | return; |
519 | } | |
520 | ||
04cd15b6 | 521 | supply_fpregset (&fpregs); |
d4f3574e SS |
522 | } |
523 | ||
04cd15b6 MK |
524 | /* Store all valid floating-point registers in GDB's register array |
525 | into the process/thread specified by TID. */ | |
d4f3574e | 526 | |
d4f3574e | 527 | static void |
ed9a39eb | 528 | store_fpregs (int tid) |
d4f3574e | 529 | { |
04cd15b6 | 530 | elf_fpregset_t fpregs; |
917317f4 | 531 | int ret; |
d4f3574e | 532 | |
04cd15b6 | 533 | ret = ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs); |
917317f4 | 534 | if (ret < 0) |
d4f3574e | 535 | { |
04cd15b6 | 536 | warning ("Couldn't get floating point status."); |
d4f3574e SS |
537 | return; |
538 | } | |
539 | ||
04cd15b6 | 540 | convert_to_fpregset (&fpregs, register_valid); |
d4f3574e | 541 | |
04cd15b6 | 542 | ret = ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs); |
917317f4 | 543 | if (ret < 0) |
d4f3574e | 544 | { |
04cd15b6 | 545 | warning ("Couldn't write floating point status."); |
d4f3574e SS |
546 | return; |
547 | } | |
d4f3574e SS |
548 | } |
549 | ||
f60300e7 MK |
550 | #else |
551 | ||
552 | static void fetch_fpregs (int tid) {} | |
553 | static void store_fpregs (int tid) {} | |
554 | ||
555 | #endif | |
556 | ||
5c44784c JM |
557 | \f |
558 | /* Transfering floating-point and SSE registers to and from GDB. */ | |
d4f3574e | 559 | |
11cf8741 JM |
560 | /* PTRACE_GETXFPREGS is a Cygnus invention, since we wrote our own |
561 | Linux kernel patch for SSE support. That patch may or may not | |
562 | actually make it into the official distribution. If you find that | |
563 | years have gone by since this code was added, and Linux isn't using | |
564 | PTRACE_GETXFPREGS, that means that our patch didn't make it, and | |
565 | you can delete this code. */ | |
566 | ||
5c44784c | 567 | #ifdef HAVE_PTRACE_GETXFPREGS |
04cd15b6 MK |
568 | |
569 | /* Fill GDB's register array with the floating-point and SSE register | |
570 | values in *XFPREGS. */ | |
571 | ||
d4f3574e | 572 | static void |
5c44784c | 573 | supply_xfpregset (struct user_xfpregs_struct *xfpregs) |
d4f3574e | 574 | { |
5c44784c | 575 | int reg; |
d4f3574e | 576 | |
5c44784c JM |
577 | /* Supply the floating-point registers. */ |
578 | for (reg = 0; reg < 8; reg++) | |
579 | supply_register (FP0_REGNUM + reg, (char *) &xfpregs->st_space[reg]); | |
580 | ||
581 | { | |
582 | supply_register (FCTRL_REGNUM, (char *) &xfpregs->cwd); | |
583 | supply_register (FSTAT_REGNUM, (char *) &xfpregs->swd); | |
584 | supply_register (FTAG_REGNUM, (char *) &xfpregs->twd); | |
585 | supply_register (FCOFF_REGNUM, (char *) &xfpregs->fip); | |
586 | supply_register (FDS_REGNUM, (char *) &xfpregs->fos); | |
587 | supply_register (FDOFF_REGNUM, (char *) &xfpregs->foo); | |
588 | ||
589 | /* Extract the code segment and opcode from the "fcs" member. */ | |
d4f3574e | 590 | { |
5c44784c JM |
591 | long l; |
592 | ||
593 | l = xfpregs->fcs & 0xffff; | |
594 | supply_register (FCS_REGNUM, (char *) &l); | |
595 | ||
596 | l = (xfpregs->fcs >> 16) & ((1 << 11) - 1); | |
597 | supply_register (FOP_REGNUM, (char *) &l); | |
d4f3574e | 598 | } |
5c44784c | 599 | } |
d4f3574e | 600 | |
5c44784c JM |
601 | /* Supply the SSE registers. */ |
602 | for (reg = 0; reg < 8; reg++) | |
603 | supply_register (XMM0_REGNUM + reg, (char *) &xfpregs->xmm_space[reg]); | |
604 | supply_register (MXCSR_REGNUM, (char *) &xfpregs->mxcsr); | |
d4f3574e SS |
605 | } |
606 | ||
04cd15b6 MK |
607 | /* Convert the valid floating-point and SSE registers in GDB's |
608 | register array to `struct user' format and store them in *XFPREGS. | |
609 | The array VALID indicates which registers are valid. If VALID is | |
610 | NULL, all registers are assumed to be valid. */ | |
d4f3574e | 611 | |
d4f3574e | 612 | static void |
5c44784c | 613 | convert_to_xfpregset (struct user_xfpregs_struct *xfpregs, |
5c44784c | 614 | signed char *valid) |
d4f3574e | 615 | { |
5c44784c | 616 | int reg; |
d4f3574e | 617 | |
5c44784c JM |
618 | /* Fill in the floating-point registers. */ |
619 | for (reg = 0; reg < 8; reg++) | |
620 | if (!valid || valid[reg]) | |
621 | memcpy (&xfpregs->st_space[reg], | |
622 | ®isters[REGISTER_BYTE (FP0_REGNUM + reg)], | |
623 | REGISTER_RAW_SIZE(FP0_REGNUM + reg)); | |
624 | ||
625 | #define fill(MEMBER, REGNO) \ | |
626 | if (! valid || valid[(REGNO)]) \ | |
627 | memcpy (&xfpregs->MEMBER, ®isters[REGISTER_BYTE (REGNO)], \ | |
628 | sizeof (xfpregs->MEMBER)) | |
629 | ||
630 | fill (cwd, FCTRL_REGNUM); | |
631 | fill (swd, FSTAT_REGNUM); | |
632 | fill (twd, FTAG_REGNUM); | |
633 | fill (fip, FCOFF_REGNUM); | |
634 | fill (foo, FDOFF_REGNUM); | |
635 | fill (fos, FDS_REGNUM); | |
636 | ||
637 | #undef fill | |
638 | ||
639 | if (! valid || valid[FCS_REGNUM]) | |
640 | xfpregs->fcs | |
641 | = ((xfpregs->fcs & ~0xffff) | |
642 | | (* (int *) ®isters[REGISTER_BYTE (FCS_REGNUM)] & 0xffff)); | |
643 | ||
644 | if (! valid || valid[FOP_REGNUM]) | |
645 | xfpregs->fcs | |
646 | = ((xfpregs->fcs & 0xffff) | |
647 | | ((*(int *) ®isters[REGISTER_BYTE (FOP_REGNUM)] & ((1 << 11) - 1)) | |
648 | << 16)); | |
649 | ||
650 | /* Fill in the XMM registers. */ | |
651 | for (reg = 0; reg < 8; reg++) | |
652 | if (! valid || valid[reg]) | |
653 | memcpy (&xfpregs->xmm_space[reg], | |
654 | ®isters[REGISTER_BYTE (XMM0_REGNUM + reg)], | |
655 | REGISTER_RAW_SIZE (XMM0_REGNUM + reg)); | |
656 | } | |
657 | ||
04cd15b6 MK |
658 | /* Fetch all registers covered by the PTRACE_SETXFPREGS request from |
659 | process/thread TID and store their values in GDB's register array. | |
660 | Return non-zero if successful, zero otherwise. */ | |
5c44784c | 661 | |
5c44784c | 662 | static int |
ed9a39eb | 663 | fetch_xfpregs (int tid) |
5c44784c | 664 | { |
5c44784c | 665 | struct user_xfpregs_struct xfpregs; |
04cd15b6 | 666 | int ret; |
5c44784c JM |
667 | |
668 | if (! have_ptrace_getxfpregs) | |
669 | return 0; | |
670 | ||
ed9a39eb | 671 | ret = ptrace (PTRACE_GETXFPREGS, tid, 0, &xfpregs); |
5c44784c | 672 | if (ret == -1) |
d4f3574e | 673 | { |
5c44784c JM |
674 | if (errno == EIO) |
675 | { | |
676 | have_ptrace_getxfpregs = 0; | |
677 | return 0; | |
678 | } | |
679 | ||
04cd15b6 | 680 | warning ("Couldn't read floating-point and SSE registers."); |
5c44784c | 681 | return 0; |
d4f3574e SS |
682 | } |
683 | ||
5c44784c JM |
684 | supply_xfpregset (&xfpregs); |
685 | return 1; | |
686 | } | |
d4f3574e | 687 | |
04cd15b6 MK |
688 | /* Store all valid registers in GDB's register array covered by the |
689 | PTRACE_SETXFPREGS request into the process/thread specified by TID. | |
690 | Return non-zero if successful, zero otherwise. */ | |
5c44784c | 691 | |
5c44784c | 692 | static int |
ed9a39eb | 693 | store_xfpregs (int tid) |
5c44784c | 694 | { |
5c44784c | 695 | struct user_xfpregs_struct xfpregs; |
04cd15b6 | 696 | int ret; |
5c44784c JM |
697 | |
698 | if (! have_ptrace_getxfpregs) | |
699 | return 0; | |
700 | ||
ed9a39eb | 701 | ret = ptrace (PTRACE_GETXFPREGS, tid, 0, &xfpregs); |
5c44784c | 702 | if (ret == -1) |
d4f3574e | 703 | { |
5c44784c JM |
704 | if (errno == EIO) |
705 | { | |
706 | have_ptrace_getxfpregs = 0; | |
707 | return 0; | |
708 | } | |
709 | ||
04cd15b6 | 710 | warning ("Couldn't read floating-point and SSE registers."); |
5c44784c JM |
711 | return 0; |
712 | } | |
713 | ||
04cd15b6 | 714 | convert_to_xfpregset (&xfpregs, register_valid); |
5c44784c | 715 | |
ed9a39eb | 716 | if (ptrace (PTRACE_SETXFPREGS, tid, 0, &xfpregs) < 0) |
5c44784c JM |
717 | { |
718 | warning ("Couldn't write floating-point and SSE registers."); | |
719 | return 0; | |
d4f3574e | 720 | } |
5c44784c JM |
721 | |
722 | return 1; | |
723 | } | |
724 | ||
04cd15b6 | 725 | /* Fill the XMM registers in the register array with dummy values. For |
5c44784c JM |
726 | cases where we don't have access to the XMM registers. I think |
727 | this is cleaner than printing a warning. For a cleaner solution, | |
728 | we should gdbarchify the i386 family. */ | |
04cd15b6 | 729 | |
5c44784c | 730 | static void |
04cd15b6 | 731 | dummy_sse_values (void) |
5c44784c JM |
732 | { |
733 | /* C doesn't have a syntax for NaN's, so write it out as an array of | |
734 | longs. */ | |
735 | static long dummy[4] = { 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff }; | |
736 | static long mxcsr = 0x1f80; | |
737 | int reg; | |
738 | ||
739 | for (reg = 0; reg < 8; reg++) | |
740 | supply_register (XMM0_REGNUM + reg, (char *) dummy); | |
741 | supply_register (MXCSR_REGNUM, (char *) &mxcsr); | |
d4f3574e SS |
742 | } |
743 | ||
5c44784c JM |
744 | #else |
745 | ||
746 | /* Stub versions of the above routines, for systems that don't have | |
747 | PTRACE_GETXFPREGS. */ | |
ed9a39eb JM |
748 | static int store_xfpregs (int tid) { return 0; } |
749 | static int fetch_xfpregs (int tid) { return 0; } | |
04cd15b6 | 750 | static void dummy_sse_values (void) {} |
5c44784c JM |
751 | |
752 | #endif | |
753 | ||
754 | \f | |
755 | /* Transferring arbitrary registers between GDB and inferior. */ | |
d4f3574e | 756 | |
04cd15b6 MK |
757 | /* Fetch register REGNO from the child process. If REGNO is -1, do |
758 | this for all registers (including the floating point and SSE | |
759 | registers). */ | |
d4f3574e SS |
760 | |
761 | void | |
917317f4 | 762 | fetch_inferior_registers (int regno) |
d4f3574e | 763 | { |
ed9a39eb JM |
764 | int tid; |
765 | ||
f60300e7 MK |
766 | /* Use the old method of peeking around in `struct user' if the |
767 | GETREGS request isn't available. */ | |
768 | if (! have_ptrace_getregs) | |
769 | { | |
770 | old_fetch_inferior_registers (regno); | |
771 | return; | |
772 | } | |
773 | ||
04cd15b6 | 774 | /* Linux LWP ID's are process ID's. */ |
ed9a39eb | 775 | if ((tid = TIDGET (inferior_pid)) == 0) |
04cd15b6 | 776 | tid = inferior_pid; /* Not a threaded program. */ |
ed9a39eb | 777 | |
04cd15b6 MK |
778 | /* Use the PTRACE_GETXFPREGS request whenever possible, since it |
779 | transfers more registers in one system call, and we'll cache the | |
780 | results. But remember that fetch_xfpregs can fail, and return | |
781 | zero. */ | |
5c44784c JM |
782 | if (regno == -1) |
783 | { | |
ed9a39eb | 784 | fetch_regs (tid); |
f60300e7 MK |
785 | |
786 | /* The call above might reset `have_ptrace_getregs'. */ | |
787 | if (! have_ptrace_getregs) | |
788 | { | |
789 | old_fetch_inferior_registers (-1); | |
790 | return; | |
791 | } | |
792 | ||
ed9a39eb | 793 | if (fetch_xfpregs (tid)) |
5c44784c | 794 | return; |
ed9a39eb | 795 | fetch_fpregs (tid); |
5c44784c JM |
796 | return; |
797 | } | |
d4f3574e | 798 | |
5c44784c JM |
799 | if (GETREGS_SUPPLIES (regno)) |
800 | { | |
ed9a39eb | 801 | fetch_regs (tid); |
5c44784c JM |
802 | return; |
803 | } | |
804 | ||
805 | if (GETXFPREGS_SUPPLIES (regno)) | |
806 | { | |
ed9a39eb | 807 | if (fetch_xfpregs (tid)) |
5c44784c JM |
808 | return; |
809 | ||
810 | /* Either our processor or our kernel doesn't support the SSE | |
811 | registers, so read the FP registers in the traditional way, | |
812 | and fill the SSE registers with dummy values. It would be | |
813 | more graceful to handle differences in the register set using | |
814 | gdbarch. Until then, this will at least make things work | |
815 | plausibly. */ | |
ed9a39eb | 816 | fetch_fpregs (tid); |
5c44784c JM |
817 | dummy_sse_values (); |
818 | return; | |
819 | } | |
820 | ||
821 | internal_error ("i386-linux-nat.c (fetch_inferior_registers): " | |
822 | "got request for bad register number %d", regno); | |
d4f3574e SS |
823 | } |
824 | ||
04cd15b6 MK |
825 | /* Store register REGNO back into the child process. If REGNO is -1, |
826 | do this for all registers (including the floating point and SSE | |
827 | registers). */ | |
d4f3574e | 828 | void |
04cd15b6 | 829 | store_inferior_registers (int regno) |
d4f3574e | 830 | { |
ed9a39eb JM |
831 | int tid; |
832 | ||
f60300e7 MK |
833 | /* Use the old method of poking around in `struct user' if the |
834 | SETREGS request isn't available. */ | |
835 | if (! have_ptrace_getregs) | |
836 | { | |
837 | old_store_inferior_registers (regno); | |
838 | return; | |
839 | } | |
840 | ||
04cd15b6 | 841 | /* Linux LWP ID's are process ID's. */ |
ed9a39eb | 842 | if ((tid = TIDGET (inferior_pid)) == 0) |
04cd15b6 | 843 | tid = inferior_pid; /* Not a threaded program. */ |
ed9a39eb | 844 | |
04cd15b6 MK |
845 | /* Use the PTRACE_SETXFPREGS requests whenever possibl, since it |
846 | transfers more registers in one system call. But remember that | |
ed9a39eb | 847 | store_xfpregs can fail, and return zero. */ |
5c44784c JM |
848 | if (regno == -1) |
849 | { | |
ed9a39eb JM |
850 | store_regs (tid); |
851 | if (store_xfpregs (tid)) | |
5c44784c | 852 | return; |
ed9a39eb | 853 | store_fpregs (tid); |
5c44784c JM |
854 | return; |
855 | } | |
d4f3574e | 856 | |
5c44784c JM |
857 | if (GETREGS_SUPPLIES (regno)) |
858 | { | |
ed9a39eb | 859 | store_regs (tid); |
5c44784c JM |
860 | return; |
861 | } | |
862 | ||
863 | if (GETXFPREGS_SUPPLIES (regno)) | |
864 | { | |
ed9a39eb | 865 | if (store_xfpregs (tid)) |
5c44784c JM |
866 | return; |
867 | ||
868 | /* Either our processor or our kernel doesn't support the SSE | |
04cd15b6 MK |
869 | registers, so just write the FP registers in the traditional |
870 | way. */ | |
ed9a39eb | 871 | store_fpregs (tid); |
5c44784c JM |
872 | return; |
873 | } | |
874 | ||
04cd15b6 | 875 | internal_error ("Got request to store bad register number %d.", regno); |
d4f3574e SS |
876 | } |
877 | ||
de57eccd JM |
878 | \f |
879 | /* Interpreting register set info found in core files. */ | |
880 | ||
881 | /* Provide registers to GDB from a core file. | |
882 | ||
883 | (We can't use the generic version of this function in | |
884 | core-regset.c, because Linux has *three* different kinds of | |
885 | register set notes. core-regset.c would have to call | |
886 | supply_xfpregset, which most platforms don't have.) | |
887 | ||
888 | CORE_REG_SECT points to an array of bytes, which are the contents | |
889 | of a `note' from a core file which BFD thinks might contain | |
890 | register contents. CORE_REG_SIZE is its size. | |
891 | ||
892 | WHICH says which register set corelow suspects this is: | |
04cd15b6 MK |
893 | 0 --- the general-purpose register set, in elf_gregset_t format |
894 | 2 --- the floating-point register set, in elf_fpregset_t format | |
895 | 3 --- the extended floating-point register set, in struct | |
896 | user_xfpregs_struct format | |
897 | ||
898 | REG_ADDR isn't used on Linux. */ | |
de57eccd | 899 | |
de57eccd | 900 | static void |
04cd15b6 MK |
901 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
902 | int which, CORE_ADDR reg_addr) | |
de57eccd | 903 | { |
04cd15b6 MK |
904 | elf_gregset_t gregset; |
905 | elf_fpregset_t fpregset; | |
de57eccd JM |
906 | |
907 | switch (which) | |
908 | { | |
909 | case 0: | |
910 | if (core_reg_size != sizeof (gregset)) | |
04cd15b6 | 911 | warning ("Wrong size gregset in core file."); |
de57eccd JM |
912 | else |
913 | { | |
914 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); | |
915 | supply_gregset (&gregset); | |
916 | } | |
917 | break; | |
918 | ||
919 | case 2: | |
920 | if (core_reg_size != sizeof (fpregset)) | |
04cd15b6 | 921 | warning ("Wrong size fpregset in core file."); |
de57eccd JM |
922 | else |
923 | { | |
924 | memcpy (&fpregset, core_reg_sect, sizeof (fpregset)); | |
925 | supply_fpregset (&fpregset); | |
926 | } | |
927 | break; | |
928 | ||
929 | #ifdef HAVE_PTRACE_GETXFPREGS | |
930 | { | |
931 | struct user_xfpregs_struct xfpregset; | |
04cd15b6 | 932 | |
de57eccd | 933 | case 3: |
04cd15b6 MK |
934 | if (core_reg_size != sizeof (xfpregset)) |
935 | warning ("Wrong size user_xfpregs_struct in core file."); | |
de57eccd JM |
936 | else |
937 | { | |
938 | memcpy (&xfpregset, core_reg_sect, sizeof (xfpregset)); | |
939 | supply_xfpregset (&xfpregset); | |
940 | } | |
941 | break; | |
942 | } | |
943 | #endif | |
944 | ||
945 | default: | |
946 | /* We've covered all the kinds of registers we know about here, | |
947 | so this must be something we wouldn't know what to do with | |
948 | anyway. Just ignore it. */ | |
949 | break; | |
950 | } | |
951 | } | |
952 | ||
5c44784c JM |
953 | \f |
954 | /* Calling functions in shared libraries. */ | |
04cd15b6 MK |
955 | /* FIXME: kettenis/2000-03-05: Doesn't this belong in a |
956 | target-dependent file? The function | |
957 | `i386_linux_skip_solib_resolver' is mentioned in | |
958 | `config/i386/tm-linux.h'. */ | |
5c44784c | 959 | |
d4f3574e SS |
960 | /* Find the minimal symbol named NAME, and return both the minsym |
961 | struct and its objfile. This probably ought to be in minsym.c, but | |
962 | everything there is trying to deal with things like C++ and | |
963 | SOFUN_ADDRESS_MAYBE_TURQUOISE, ... Since this is so simple, it may | |
964 | be considered too special-purpose for general consumption. */ | |
965 | ||
966 | static struct minimal_symbol * | |
967 | find_minsym_and_objfile (char *name, struct objfile **objfile_p) | |
968 | { | |
969 | struct objfile *objfile; | |
970 | ||
971 | ALL_OBJFILES (objfile) | |
972 | { | |
973 | struct minimal_symbol *msym; | |
974 | ||
975 | ALL_OBJFILE_MSYMBOLS (objfile, msym) | |
976 | { | |
977 | if (SYMBOL_NAME (msym) | |
978 | && STREQ (SYMBOL_NAME (msym), name)) | |
979 | { | |
980 | *objfile_p = objfile; | |
981 | return msym; | |
982 | } | |
983 | } | |
984 | } | |
985 | ||
986 | return 0; | |
987 | } | |
988 | ||
989 | ||
990 | static CORE_ADDR | |
991 | skip_hurd_resolver (CORE_ADDR pc) | |
992 | { | |
993 | /* The HURD dynamic linker is part of the GNU C library, so many | |
994 | GNU/Linux distributions use it. (All ELF versions, as far as I | |
995 | know.) An unresolved PLT entry points to "_dl_runtime_resolve", | |
996 | which calls "fixup" to patch the PLT, and then passes control to | |
997 | the function. | |
998 | ||
999 | We look for the symbol `_dl_runtime_resolve', and find `fixup' in | |
1000 | the same objfile. If we are at the entry point of `fixup', then | |
1001 | we set a breakpoint at the return address (at the top of the | |
1002 | stack), and continue. | |
1003 | ||
1004 | It's kind of gross to do all these checks every time we're | |
1005 | called, since they don't change once the executable has gotten | |
1006 | started. But this is only a temporary hack --- upcoming versions | |
1007 | of Linux will provide a portable, efficient interface for | |
1008 | debugging programs that use shared libraries. */ | |
1009 | ||
1010 | struct objfile *objfile; | |
1011 | struct minimal_symbol *resolver | |
1012 | = find_minsym_and_objfile ("_dl_runtime_resolve", &objfile); | |
1013 | ||
1014 | if (resolver) | |
1015 | { | |
1016 | struct minimal_symbol *fixup | |
1017 | = lookup_minimal_symbol ("fixup", 0, objfile); | |
1018 | ||
1019 | if (fixup && SYMBOL_VALUE_ADDRESS (fixup) == pc) | |
1020 | return (SAVED_PC_AFTER_CALL (get_current_frame ())); | |
1021 | } | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
d4f3574e SS |
1026 | /* See the comments for SKIP_SOLIB_RESOLVER at the top of infrun.c. |
1027 | This function: | |
1028 | 1) decides whether a PLT has sent us into the linker to resolve | |
1029 | a function reference, and | |
1030 | 2) if so, tells us where to set a temporary breakpoint that will | |
1031 | trigger when the dynamic linker is done. */ | |
1032 | ||
1033 | CORE_ADDR | |
1034 | i386_linux_skip_solib_resolver (CORE_ADDR pc) | |
1035 | { | |
1036 | CORE_ADDR result; | |
1037 | ||
1038 | /* Plug in functions for other kinds of resolvers here. */ | |
1039 | result = skip_hurd_resolver (pc); | |
1040 | if (result) | |
1041 | return result; | |
1042 | ||
1043 | return 0; | |
1044 | } | |
de57eccd | 1045 | |
de57eccd | 1046 | \f |
04cd15b6 MK |
1047 | /* Register that we are able to handle Linux ELF core file formats. */ |
1048 | ||
1049 | static struct core_fns linux_elf_core_fns = | |
1050 | { | |
1051 | bfd_target_elf_flavour, /* core_flavour */ | |
1052 | default_check_format, /* check_format */ | |
1053 | default_core_sniffer, /* core_sniffer */ | |
1054 | fetch_core_registers, /* core_read_registers */ | |
1055 | NULL /* next */ | |
1056 | }; | |
de57eccd JM |
1057 | |
1058 | void | |
1059 | _initialize_i386_linux_nat () | |
1060 | { | |
04cd15b6 | 1061 | add_core_fns (&linux_elf_core_fns); |
de57eccd | 1062 | } |