Commit | Line | Data |
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a4194092 | 1 | /* Native-dependent code for GNU/Linux i386. |
a4b6fc86 | 2 | |
0fb0cc75 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
7b6bb8da | 4 | 2009, 2010, 2011 Free Software Foundation, Inc. |
d4f3574e | 5 | |
04cd15b6 | 6 | This file is part of GDB. |
d4f3574e | 7 | |
04cd15b6 MK |
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 |
04cd15b6 | 11 | (at your option) any later version. |
d4f3574e | 12 | |
04cd15b6 MK |
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. | |
d4f3574e | 17 | |
04cd15b6 | 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/>. */ |
d4f3574e SS |
20 | |
21 | #include "defs.h" | |
9bb9e8ad | 22 | #include "i386-nat.h" |
d4f3574e SS |
23 | #include "inferior.h" |
24 | #include "gdbcore.h" | |
4e052eda | 25 | #include "regcache.h" |
c131fcee | 26 | #include "regset.h" |
10d6c8cd | 27 | #include "target.h" |
4de4c07c | 28 | #include "linux-nat.h" |
d4f3574e | 29 | |
84346e11 | 30 | #include "gdb_assert.h" |
309367d4 | 31 | #include "gdb_string.h" |
c131fcee L |
32 | #include "elf/common.h" |
33 | #include <sys/uio.h> | |
d4f3574e SS |
34 | #include <sys/ptrace.h> |
35 | #include <sys/user.h> | |
36 | #include <sys/procfs.h> | |
37 | ||
38 | #ifdef HAVE_SYS_REG_H | |
39 | #include <sys/reg.h> | |
40 | #endif | |
41 | ||
ce556f85 MK |
42 | #ifndef ORIG_EAX |
43 | #define ORIG_EAX -1 | |
44 | #endif | |
45 | ||
84346e11 MK |
46 | #ifdef HAVE_SYS_DEBUGREG_H |
47 | #include <sys/debugreg.h> | |
48 | #endif | |
49 | ||
50 | #ifndef DR_FIRSTADDR | |
51 | #define DR_FIRSTADDR 0 | |
52 | #endif | |
53 | ||
54 | #ifndef DR_LASTADDR | |
55 | #define DR_LASTADDR 3 | |
56 | #endif | |
57 | ||
58 | #ifndef DR_STATUS | |
59 | #define DR_STATUS 6 | |
60 | #endif | |
61 | ||
62 | #ifndef DR_CONTROL | |
63 | #define DR_CONTROL 7 | |
64 | #endif | |
65 | ||
6ce2ac0b | 66 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
67 | #include "gregset.h" |
68 | ||
e750d25e | 69 | #include "i387-tdep.h" |
c3833324 | 70 | #include "i386-tdep.h" |
5179e78f AC |
71 | #include "i386-linux-tdep.h" |
72 | ||
b757528f JJ |
73 | /* Defines ps_err_e, struct ps_prochandle. */ |
74 | #include "gdb_proc_service.h" | |
c131fcee L |
75 | |
76 | #include "i386-xstate.h" | |
77 | ||
78 | #ifndef PTRACE_GETREGSET | |
79 | #define PTRACE_GETREGSET 0x4204 | |
80 | #endif | |
81 | ||
82 | #ifndef PTRACE_SETREGSET | |
83 | #define PTRACE_SETREGSET 0x4205 | |
84 | #endif | |
85 | ||
86 | /* Does the current host support PTRACE_GETREGSET? */ | |
87 | static int have_ptrace_getregset = -1; | |
6ce2ac0b | 88 | \f |
d4f3574e | 89 | |
a4b6fc86 AC |
90 | /* The register sets used in GNU/Linux ELF core-dumps are identical to |
91 | the register sets in `struct user' that is used for a.out | |
92 | core-dumps, and is also used by `ptrace'. The corresponding types | |
93 | are `elf_gregset_t' for the general-purpose registers (with | |
04cd15b6 MK |
94 | `elf_greg_t' the type of a single GP register) and `elf_fpregset_t' |
95 | for the floating-point registers. | |
96 | ||
97 | Those types used to be available under the names `gregset_t' and | |
98 | `fpregset_t' too, and this file used those names in the past. But | |
99 | those names are now used for the register sets used in the | |
100 | `mcontext_t' type, and have a different size and layout. */ | |
101 | ||
5c44784c JM |
102 | /* Which ptrace request retrieves which registers? |
103 | These apply to the corresponding SET requests as well. */ | |
e64a344c | 104 | |
5c44784c | 105 | #define GETREGS_SUPPLIES(regno) \ |
3fb1c838 | 106 | ((0 <= (regno) && (regno) <= 15) || (regno) == I386_LINUX_ORIG_EAX_REGNUM) |
e64a344c | 107 | |
6ce2ac0b | 108 | #define GETFPXREGS_SUPPLIES(regno) \ |
f6792ef4 | 109 | (I386_ST0_REGNUM <= (regno) && (regno) < I386_SSE_NUM_REGS) |
5c44784c | 110 | |
c131fcee L |
111 | #define GETXSTATEREGS_SUPPLIES(regno) \ |
112 | (I386_ST0_REGNUM <= (regno) && (regno) < I386_AVX_NUM_REGS) | |
113 | ||
f60300e7 MK |
114 | /* Does the current host support the GETREGS request? */ |
115 | int have_ptrace_getregs = | |
116 | #ifdef HAVE_PTRACE_GETREGS | |
117 | 1 | |
118 | #else | |
119 | 0 | |
120 | #endif | |
121 | ; | |
122 | ||
6ce2ac0b | 123 | /* Does the current host support the GETFPXREGS request? The header |
5c44784c JM |
124 | file may or may not define it, and even if it is defined, the |
125 | kernel will return EIO if it's running on a pre-SSE processor. | |
126 | ||
127 | My instinct is to attach this to some architecture- or | |
128 | target-specific data structure, but really, a particular GDB | |
129 | process can only run on top of one kernel at a time. So it's okay | |
130 | for this to be a simple variable. */ | |
6ce2ac0b MK |
131 | int have_ptrace_getfpxregs = |
132 | #ifdef HAVE_PTRACE_GETFPXREGS | |
3a13a53b | 133 | -1 |
5c44784c JM |
134 | #else |
135 | 0 | |
136 | #endif | |
137 | ; | |
f60300e7 | 138 | \f |
6ce2ac0b | 139 | |
ce556f85 | 140 | /* Accessing registers through the U area, one at a time. */ |
f60300e7 MK |
141 | |
142 | /* Fetch one register. */ | |
143 | ||
144 | static void | |
56be3814 | 145 | fetch_register (struct regcache *regcache, int regno) |
f60300e7 | 146 | { |
f60300e7 | 147 | int tid; |
ce556f85 | 148 | int val; |
f60300e7 | 149 | |
ce556f85 | 150 | gdb_assert (!have_ptrace_getregs); |
be0d2954 | 151 | if (i386_linux_gregset_reg_offset[regno] == -1) |
f60300e7 | 152 | { |
56be3814 | 153 | regcache_raw_supply (regcache, regno, NULL); |
f60300e7 MK |
154 | return; |
155 | } | |
156 | ||
ce556f85 | 157 | /* GNU/Linux LWP ID's are process ID's. */ |
e64a344c MK |
158 | tid = TIDGET (inferior_ptid); |
159 | if (tid == 0) | |
160 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
f60300e7 | 161 | |
ce556f85 | 162 | errno = 0; |
be0d2954 L |
163 | val = ptrace (PTRACE_PEEKUSER, tid, |
164 | i386_linux_gregset_reg_offset[regno], 0); | |
ce556f85 | 165 | if (errno != 0) |
c9f4d572 | 166 | error (_("Couldn't read register %s (#%d): %s."), |
875f8d0e | 167 | gdbarch_register_name (get_regcache_arch (regcache), regno), |
ce556f85 | 168 | regno, safe_strerror (errno)); |
f60300e7 | 169 | |
56be3814 | 170 | regcache_raw_supply (regcache, regno, &val); |
f60300e7 MK |
171 | } |
172 | ||
1777feb0 | 173 | /* Store one register. */ |
f60300e7 MK |
174 | |
175 | static void | |
56be3814 | 176 | store_register (const struct regcache *regcache, int regno) |
f60300e7 | 177 | { |
f60300e7 | 178 | int tid; |
ce556f85 | 179 | int val; |
f60300e7 | 180 | |
ce556f85 | 181 | gdb_assert (!have_ptrace_getregs); |
be0d2954 | 182 | if (i386_linux_gregset_reg_offset[regno] == -1) |
ce556f85 | 183 | return; |
f60300e7 | 184 | |
ce556f85 | 185 | /* GNU/Linux LWP ID's are process ID's. */ |
e64a344c MK |
186 | tid = TIDGET (inferior_ptid); |
187 | if (tid == 0) | |
188 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
f60300e7 | 189 | |
ce556f85 | 190 | errno = 0; |
56be3814 | 191 | regcache_raw_collect (regcache, regno, &val); |
be0d2954 L |
192 | ptrace (PTRACE_POKEUSER, tid, |
193 | i386_linux_gregset_reg_offset[regno], val); | |
ce556f85 | 194 | if (errno != 0) |
c9f4d572 | 195 | error (_("Couldn't write register %s (#%d): %s."), |
875f8d0e | 196 | gdbarch_register_name (get_regcache_arch (regcache), regno), |
ce556f85 | 197 | regno, safe_strerror (errno)); |
f60300e7 | 198 | } |
5c44784c | 199 | \f |
6ce2ac0b | 200 | |
04cd15b6 MK |
201 | /* Transfering the general-purpose registers between GDB, inferiors |
202 | and core files. */ | |
203 | ||
ad2a4d09 | 204 | /* Fill GDB's register array with the general-purpose register values |
04cd15b6 | 205 | in *GREGSETP. */ |
5c44784c | 206 | |
d4f3574e | 207 | void |
7f7fe91e | 208 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
d4f3574e | 209 | { |
be0d2954 | 210 | const gdb_byte *regp = (const gdb_byte *) gregsetp; |
6ce2ac0b | 211 | int i; |
d4f3574e | 212 | |
98df6387 | 213 | for (i = 0; i < I386_NUM_GREGS; i++) |
be0d2954 L |
214 | regcache_raw_supply (regcache, i, |
215 | regp + i386_linux_gregset_reg_offset[i]); | |
3fb1c838 | 216 | |
875f8d0e UW |
217 | if (I386_LINUX_ORIG_EAX_REGNUM |
218 | < gdbarch_num_regs (get_regcache_arch (regcache))) | |
1777feb0 MS |
219 | regcache_raw_supply (regcache, I386_LINUX_ORIG_EAX_REGNUM, regp |
220 | + i386_linux_gregset_reg_offset[I386_LINUX_ORIG_EAX_REGNUM]); | |
917317f4 JM |
221 | } |
222 | ||
04cd15b6 MK |
223 | /* Fill register REGNO (if it is a general-purpose register) in |
224 | *GREGSETPS with the value in GDB's register array. If REGNO is -1, | |
225 | do this for all registers. */ | |
6ce2ac0b | 226 | |
917317f4 | 227 | void |
7f7fe91e UW |
228 | fill_gregset (const struct regcache *regcache, |
229 | elf_gregset_t *gregsetp, int regno) | |
917317f4 | 230 | { |
be0d2954 | 231 | gdb_byte *regp = (gdb_byte *) gregsetp; |
6ce2ac0b | 232 | int i; |
04cd15b6 | 233 | |
98df6387 | 234 | for (i = 0; i < I386_NUM_GREGS; i++) |
099a9414 | 235 | if (regno == -1 || regno == i) |
be0d2954 L |
236 | regcache_raw_collect (regcache, i, |
237 | regp + i386_linux_gregset_reg_offset[i]); | |
3fb1c838 | 238 | |
82ea117a | 239 | if ((regno == -1 || regno == I386_LINUX_ORIG_EAX_REGNUM) |
875f8d0e UW |
240 | && I386_LINUX_ORIG_EAX_REGNUM |
241 | < gdbarch_num_regs (get_regcache_arch (regcache))) | |
1777feb0 MS |
242 | regcache_raw_collect (regcache, I386_LINUX_ORIG_EAX_REGNUM, regp |
243 | + i386_linux_gregset_reg_offset[I386_LINUX_ORIG_EAX_REGNUM]); | |
d4f3574e SS |
244 | } |
245 | ||
f60300e7 MK |
246 | #ifdef HAVE_PTRACE_GETREGS |
247 | ||
04cd15b6 MK |
248 | /* Fetch all general-purpose registers from process/thread TID and |
249 | store their values in GDB's register array. */ | |
d4f3574e | 250 | |
5c44784c | 251 | static void |
56be3814 | 252 | fetch_regs (struct regcache *regcache, int tid) |
5c44784c | 253 | { |
04cd15b6 | 254 | elf_gregset_t regs; |
2e024c20 | 255 | elf_gregset_t *regs_p = ®s; |
5c44784c | 256 | |
6ce2ac0b | 257 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) |
5c44784c | 258 | { |
f60300e7 MK |
259 | if (errno == EIO) |
260 | { | |
261 | /* The kernel we're running on doesn't support the GETREGS | |
262 | request. Reset `have_ptrace_getregs'. */ | |
263 | have_ptrace_getregs = 0; | |
264 | return; | |
265 | } | |
266 | ||
e2e0b3e5 | 267 | perror_with_name (_("Couldn't get registers")); |
5c44784c JM |
268 | } |
269 | ||
2e024c20 | 270 | supply_gregset (regcache, (const elf_gregset_t *) regs_p); |
5c44784c JM |
271 | } |
272 | ||
04cd15b6 MK |
273 | /* Store all valid general-purpose registers in GDB's register array |
274 | into the process/thread specified by TID. */ | |
5c44784c | 275 | |
5c44784c | 276 | static void |
56be3814 | 277 | store_regs (const struct regcache *regcache, int tid, int regno) |
5c44784c | 278 | { |
04cd15b6 | 279 | elf_gregset_t regs; |
5c44784c | 280 | |
6ce2ac0b | 281 | if (ptrace (PTRACE_GETREGS, tid, 0, (int) ®s) < 0) |
e2e0b3e5 | 282 | perror_with_name (_("Couldn't get registers")); |
5c44784c | 283 | |
56be3814 | 284 | fill_gregset (regcache, ®s, regno); |
6ce2ac0b MK |
285 | |
286 | if (ptrace (PTRACE_SETREGS, tid, 0, (int) ®s) < 0) | |
e2e0b3e5 | 287 | perror_with_name (_("Couldn't write registers")); |
5c44784c JM |
288 | } |
289 | ||
f60300e7 MK |
290 | #else |
291 | ||
56be3814 UW |
292 | static void fetch_regs (struct regcache *regcache, int tid) {} |
293 | static void store_regs (const struct regcache *regcache, int tid, int regno) {} | |
f60300e7 MK |
294 | |
295 | #endif | |
5c44784c | 296 | \f |
5c44784c | 297 | |
6ce2ac0b | 298 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
d4f3574e | 299 | |
04cd15b6 | 300 | /* Fill GDB's register array with the floating-point register values in |
917317f4 | 301 | *FPREGSETP. */ |
04cd15b6 | 302 | |
d4f3574e | 303 | void |
7f7fe91e | 304 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
d4f3574e | 305 | { |
7f7fe91e | 306 | i387_supply_fsave (regcache, -1, fpregsetp); |
917317f4 | 307 | } |
d4f3574e | 308 | |
04cd15b6 MK |
309 | /* Fill register REGNO (if it is a floating-point register) in |
310 | *FPREGSETP with the value in GDB's register array. If REGNO is -1, | |
311 | do this for all registers. */ | |
917317f4 JM |
312 | |
313 | void | |
7f7fe91e UW |
314 | fill_fpregset (const struct regcache *regcache, |
315 | elf_fpregset_t *fpregsetp, int regno) | |
917317f4 | 316 | { |
7f7fe91e | 317 | i387_collect_fsave (regcache, regno, fpregsetp); |
d4f3574e SS |
318 | } |
319 | ||
f60300e7 MK |
320 | #ifdef HAVE_PTRACE_GETREGS |
321 | ||
04cd15b6 MK |
322 | /* Fetch all floating-point registers from process/thread TID and store |
323 | thier values in GDB's register array. */ | |
917317f4 | 324 | |
d4f3574e | 325 | static void |
56be3814 | 326 | fetch_fpregs (struct regcache *regcache, int tid) |
d4f3574e | 327 | { |
04cd15b6 | 328 | elf_fpregset_t fpregs; |
d4f3574e | 329 | |
6ce2ac0b | 330 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) |
e2e0b3e5 | 331 | perror_with_name (_("Couldn't get floating point status")); |
d4f3574e | 332 | |
56be3814 | 333 | supply_fpregset (regcache, (const elf_fpregset_t *) &fpregs); |
d4f3574e SS |
334 | } |
335 | ||
04cd15b6 MK |
336 | /* Store all valid floating-point registers in GDB's register array |
337 | into the process/thread specified by TID. */ | |
d4f3574e | 338 | |
d4f3574e | 339 | static void |
56be3814 | 340 | store_fpregs (const struct regcache *regcache, int tid, int regno) |
d4f3574e | 341 | { |
04cd15b6 | 342 | elf_fpregset_t fpregs; |
d4f3574e | 343 | |
6ce2ac0b | 344 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (int) &fpregs) < 0) |
e2e0b3e5 | 345 | perror_with_name (_("Couldn't get floating point status")); |
d4f3574e | 346 | |
56be3814 | 347 | fill_fpregset (regcache, &fpregs, regno); |
d4f3574e | 348 | |
6ce2ac0b | 349 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (int) &fpregs) < 0) |
e2e0b3e5 | 350 | perror_with_name (_("Couldn't write floating point status")); |
d4f3574e SS |
351 | } |
352 | ||
f60300e7 MK |
353 | #else |
354 | ||
1777feb0 MS |
355 | static void |
356 | fetch_fpregs (struct regcache *regcache, int tid) | |
357 | { | |
358 | } | |
359 | ||
360 | static void | |
361 | store_fpregs (const struct regcache *regcache, int tid, int regno) | |
362 | { | |
363 | } | |
f60300e7 MK |
364 | |
365 | #endif | |
5c44784c | 366 | \f |
d4f3574e | 367 | |
6ce2ac0b | 368 | /* Transfering floating-point and SSE registers to and from GDB. */ |
11cf8741 | 369 | |
c131fcee L |
370 | /* Fetch all registers covered by the PTRACE_GETREGSET request from |
371 | process/thread TID and store their values in GDB's register array. | |
372 | Return non-zero if successful, zero otherwise. */ | |
373 | ||
374 | static int | |
375 | fetch_xstateregs (struct regcache *regcache, int tid) | |
376 | { | |
377 | char xstateregs[I386_XSTATE_MAX_SIZE]; | |
378 | struct iovec iov; | |
379 | ||
380 | if (!have_ptrace_getregset) | |
381 | return 0; | |
382 | ||
383 | iov.iov_base = xstateregs; | |
384 | iov.iov_len = sizeof(xstateregs); | |
385 | if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE, | |
386 | &iov) < 0) | |
387 | perror_with_name (_("Couldn't read extended state status")); | |
388 | ||
389 | i387_supply_xsave (regcache, -1, xstateregs); | |
390 | return 1; | |
391 | } | |
392 | ||
393 | /* Store all valid registers in GDB's register array covered by the | |
394 | PTRACE_SETREGSET request into the process/thread specified by TID. | |
395 | Return non-zero if successful, zero otherwise. */ | |
396 | ||
397 | static int | |
398 | store_xstateregs (const struct regcache *regcache, int tid, int regno) | |
399 | { | |
400 | char xstateregs[I386_XSTATE_MAX_SIZE]; | |
401 | struct iovec iov; | |
402 | ||
403 | if (!have_ptrace_getregset) | |
404 | return 0; | |
405 | ||
406 | iov.iov_base = xstateregs; | |
407 | iov.iov_len = sizeof(xstateregs); | |
408 | if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE, | |
409 | &iov) < 0) | |
410 | perror_with_name (_("Couldn't read extended state status")); | |
411 | ||
412 | i387_collect_xsave (regcache, regno, xstateregs, 0); | |
413 | ||
414 | if (ptrace (PTRACE_SETREGSET, tid, (unsigned int) NT_X86_XSTATE, | |
415 | (int) &iov) < 0) | |
416 | perror_with_name (_("Couldn't write extended state status")); | |
417 | ||
418 | return 1; | |
419 | } | |
420 | ||
6ce2ac0b | 421 | #ifdef HAVE_PTRACE_GETFPXREGS |
04cd15b6 | 422 | |
6ce2ac0b | 423 | /* Fetch all registers covered by the PTRACE_GETFPXREGS request from |
04cd15b6 MK |
424 | process/thread TID and store their values in GDB's register array. |
425 | Return non-zero if successful, zero otherwise. */ | |
5c44784c | 426 | |
5c44784c | 427 | static int |
56be3814 | 428 | fetch_fpxregs (struct regcache *regcache, int tid) |
5c44784c | 429 | { |
6ce2ac0b | 430 | elf_fpxregset_t fpxregs; |
5c44784c | 431 | |
6ce2ac0b | 432 | if (! have_ptrace_getfpxregs) |
5c44784c JM |
433 | return 0; |
434 | ||
6ce2ac0b | 435 | if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0) |
d4f3574e | 436 | { |
5c44784c JM |
437 | if (errno == EIO) |
438 | { | |
6ce2ac0b | 439 | have_ptrace_getfpxregs = 0; |
5c44784c JM |
440 | return 0; |
441 | } | |
442 | ||
e2e0b3e5 | 443 | perror_with_name (_("Couldn't read floating-point and SSE registers")); |
d4f3574e SS |
444 | } |
445 | ||
b7a8b4ef | 446 | i387_supply_fxsave (regcache, -1, (const elf_fpxregset_t *) &fpxregs); |
5c44784c JM |
447 | return 1; |
448 | } | |
d4f3574e | 449 | |
04cd15b6 | 450 | /* Store all valid registers in GDB's register array covered by the |
6ce2ac0b | 451 | PTRACE_SETFPXREGS request into the process/thread specified by TID. |
04cd15b6 | 452 | Return non-zero if successful, zero otherwise. */ |
5c44784c | 453 | |
5c44784c | 454 | static int |
56be3814 | 455 | store_fpxregs (const struct regcache *regcache, int tid, int regno) |
5c44784c | 456 | { |
6ce2ac0b | 457 | elf_fpxregset_t fpxregs; |
5c44784c | 458 | |
6ce2ac0b | 459 | if (! have_ptrace_getfpxregs) |
5c44784c | 460 | return 0; |
6ce2ac0b MK |
461 | |
462 | if (ptrace (PTRACE_GETFPXREGS, tid, 0, &fpxregs) == -1) | |
2866d305 MK |
463 | { |
464 | if (errno == EIO) | |
465 | { | |
466 | have_ptrace_getfpxregs = 0; | |
467 | return 0; | |
468 | } | |
469 | ||
e2e0b3e5 | 470 | perror_with_name (_("Couldn't read floating-point and SSE registers")); |
2866d305 | 471 | } |
5c44784c | 472 | |
b7a8b4ef | 473 | i387_collect_fxsave (regcache, regno, &fpxregs); |
5c44784c | 474 | |
6ce2ac0b | 475 | if (ptrace (PTRACE_SETFPXREGS, tid, 0, &fpxregs) == -1) |
e2e0b3e5 | 476 | perror_with_name (_("Couldn't write floating-point and SSE registers")); |
5c44784c JM |
477 | |
478 | return 1; | |
479 | } | |
480 | ||
5c44784c JM |
481 | #else |
482 | ||
1777feb0 MS |
483 | static int |
484 | fetch_fpxregs (struct regcache *regcache, int tid) | |
485 | { | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static int | |
490 | store_fpxregs (const struct regcache *regcache, int tid, int regno) | |
491 | { | |
492 | return 0; | |
493 | } | |
5c44784c | 494 | |
6ce2ac0b | 495 | #endif /* HAVE_PTRACE_GETFPXREGS */ |
5c44784c | 496 | \f |
6ce2ac0b | 497 | |
5c44784c | 498 | /* Transferring arbitrary registers between GDB and inferior. */ |
d4f3574e | 499 | |
04cd15b6 MK |
500 | /* Fetch register REGNO from the child process. If REGNO is -1, do |
501 | this for all registers (including the floating point and SSE | |
502 | registers). */ | |
d4f3574e | 503 | |
10d6c8cd | 504 | static void |
28439f5e PA |
505 | i386_linux_fetch_inferior_registers (struct target_ops *ops, |
506 | struct regcache *regcache, int regno) | |
d4f3574e | 507 | { |
ed9a39eb JM |
508 | int tid; |
509 | ||
f60300e7 MK |
510 | /* Use the old method of peeking around in `struct user' if the |
511 | GETREGS request isn't available. */ | |
ce556f85 | 512 | if (!have_ptrace_getregs) |
f60300e7 | 513 | { |
ce556f85 MK |
514 | int i; |
515 | ||
875f8d0e | 516 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
ce556f85 | 517 | if (regno == -1 || regno == i) |
56be3814 | 518 | fetch_register (regcache, i); |
ce556f85 | 519 | |
f60300e7 MK |
520 | return; |
521 | } | |
522 | ||
a4b6fc86 | 523 | /* GNU/Linux LWP ID's are process ID's. */ |
e64a344c MK |
524 | tid = TIDGET (inferior_ptid); |
525 | if (tid == 0) | |
526 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
ed9a39eb | 527 | |
6ce2ac0b | 528 | /* Use the PTRACE_GETFPXREGS request whenever possible, since it |
04cd15b6 | 529 | transfers more registers in one system call, and we'll cache the |
6ce2ac0b | 530 | results. But remember that fetch_fpxregs can fail, and return |
04cd15b6 | 531 | zero. */ |
5c44784c JM |
532 | if (regno == -1) |
533 | { | |
56be3814 | 534 | fetch_regs (regcache, tid); |
f60300e7 MK |
535 | |
536 | /* The call above might reset `have_ptrace_getregs'. */ | |
ce556f85 | 537 | if (!have_ptrace_getregs) |
f60300e7 | 538 | { |
84e473c8 | 539 | i386_linux_fetch_inferior_registers (ops, regcache, regno); |
f60300e7 MK |
540 | return; |
541 | } | |
542 | ||
c131fcee L |
543 | if (fetch_xstateregs (regcache, tid)) |
544 | return; | |
56be3814 | 545 | if (fetch_fpxregs (regcache, tid)) |
5c44784c | 546 | return; |
56be3814 | 547 | fetch_fpregs (regcache, tid); |
5c44784c JM |
548 | return; |
549 | } | |
d4f3574e | 550 | |
5c44784c JM |
551 | if (GETREGS_SUPPLIES (regno)) |
552 | { | |
56be3814 | 553 | fetch_regs (regcache, tid); |
5c44784c JM |
554 | return; |
555 | } | |
556 | ||
c131fcee L |
557 | if (GETXSTATEREGS_SUPPLIES (regno)) |
558 | { | |
559 | if (fetch_xstateregs (regcache, tid)) | |
560 | return; | |
561 | } | |
562 | ||
6ce2ac0b | 563 | if (GETFPXREGS_SUPPLIES (regno)) |
5c44784c | 564 | { |
56be3814 | 565 | if (fetch_fpxregs (regcache, tid)) |
5c44784c JM |
566 | return; |
567 | ||
568 | /* Either our processor or our kernel doesn't support the SSE | |
569 | registers, so read the FP registers in the traditional way, | |
570 | and fill the SSE registers with dummy values. It would be | |
571 | more graceful to handle differences in the register set using | |
572 | gdbarch. Until then, this will at least make things work | |
573 | plausibly. */ | |
56be3814 | 574 | fetch_fpregs (regcache, tid); |
5c44784c JM |
575 | return; |
576 | } | |
577 | ||
8e65ff28 | 578 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 579 | _("Got request for bad register number %d."), regno); |
d4f3574e SS |
580 | } |
581 | ||
04cd15b6 MK |
582 | /* Store register REGNO back into the child process. If REGNO is -1, |
583 | do this for all registers (including the floating point and SSE | |
584 | registers). */ | |
10d6c8cd | 585 | static void |
28439f5e PA |
586 | i386_linux_store_inferior_registers (struct target_ops *ops, |
587 | struct regcache *regcache, int regno) | |
d4f3574e | 588 | { |
ed9a39eb JM |
589 | int tid; |
590 | ||
f60300e7 MK |
591 | /* Use the old method of poking around in `struct user' if the |
592 | SETREGS request isn't available. */ | |
ce556f85 | 593 | if (!have_ptrace_getregs) |
f60300e7 | 594 | { |
ce556f85 MK |
595 | int i; |
596 | ||
875f8d0e | 597 | for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++) |
ce556f85 | 598 | if (regno == -1 || regno == i) |
56be3814 | 599 | store_register (regcache, i); |
ce556f85 | 600 | |
f60300e7 MK |
601 | return; |
602 | } | |
603 | ||
a4b6fc86 | 604 | /* GNU/Linux LWP ID's are process ID's. */ |
e64a344c MK |
605 | tid = TIDGET (inferior_ptid); |
606 | if (tid == 0) | |
607 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
ed9a39eb | 608 | |
6ce2ac0b | 609 | /* Use the PTRACE_SETFPXREGS requests whenever possible, since it |
04cd15b6 | 610 | transfers more registers in one system call. But remember that |
6ce2ac0b | 611 | store_fpxregs can fail, and return zero. */ |
5c44784c JM |
612 | if (regno == -1) |
613 | { | |
56be3814 | 614 | store_regs (regcache, tid, regno); |
c131fcee L |
615 | if (store_xstateregs (regcache, tid, regno)) |
616 | return; | |
56be3814 | 617 | if (store_fpxregs (regcache, tid, regno)) |
5c44784c | 618 | return; |
56be3814 | 619 | store_fpregs (regcache, tid, regno); |
5c44784c JM |
620 | return; |
621 | } | |
d4f3574e | 622 | |
5c44784c JM |
623 | if (GETREGS_SUPPLIES (regno)) |
624 | { | |
56be3814 | 625 | store_regs (regcache, tid, regno); |
5c44784c JM |
626 | return; |
627 | } | |
628 | ||
c131fcee L |
629 | if (GETXSTATEREGS_SUPPLIES (regno)) |
630 | { | |
631 | if (store_xstateregs (regcache, tid, regno)) | |
632 | return; | |
633 | } | |
634 | ||
6ce2ac0b | 635 | if (GETFPXREGS_SUPPLIES (regno)) |
5c44784c | 636 | { |
56be3814 | 637 | if (store_fpxregs (regcache, tid, regno)) |
5c44784c JM |
638 | return; |
639 | ||
640 | /* Either our processor or our kernel doesn't support the SSE | |
04cd15b6 MK |
641 | registers, so just write the FP registers in the traditional |
642 | way. */ | |
56be3814 | 643 | store_fpregs (regcache, tid, regno); |
5c44784c JM |
644 | return; |
645 | } | |
646 | ||
8e65ff28 | 647 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 648 | _("Got request to store bad register number %d."), regno); |
d4f3574e | 649 | } |
de57eccd | 650 | \f |
6ce2ac0b | 651 | |
4ffc8466 MK |
652 | /* Support for debug registers. */ |
653 | ||
9f0bdab8 DJ |
654 | static unsigned long i386_linux_dr[DR_CONTROL + 1]; |
655 | ||
a79d3c27 JK |
656 | /* Get debug register REGNUM value from only the one LWP of PTID. */ |
657 | ||
7bf0983e | 658 | static unsigned long |
9f0bdab8 | 659 | i386_linux_dr_get (ptid_t ptid, int regnum) |
84346e11 MK |
660 | { |
661 | int tid; | |
7bf0983e | 662 | unsigned long value; |
84346e11 | 663 | |
9f0bdab8 DJ |
664 | tid = TIDGET (ptid); |
665 | if (tid == 0) | |
666 | tid = PIDGET (ptid); | |
84346e11 | 667 | |
b9511b9a MK |
668 | /* FIXME: kettenis/2001-03-27: Calling perror_with_name if the |
669 | ptrace call fails breaks debugging remote targets. The correct | |
670 | way to fix this is to add the hardware breakpoint and watchpoint | |
7532965f | 671 | stuff to the target vector. For now, just return zero if the |
b9511b9a | 672 | ptrace call fails. */ |
84346e11 | 673 | errno = 0; |
ce556f85 | 674 | value = ptrace (PTRACE_PEEKUSER, tid, |
84346e11 MK |
675 | offsetof (struct user, u_debugreg[regnum]), 0); |
676 | if (errno != 0) | |
b9511b9a | 677 | #if 0 |
e2e0b3e5 | 678 | perror_with_name (_("Couldn't read debug register")); |
b9511b9a MK |
679 | #else |
680 | return 0; | |
681 | #endif | |
84346e11 MK |
682 | |
683 | return value; | |
684 | } | |
685 | ||
a79d3c27 JK |
686 | /* Set debug register REGNUM to VALUE in only the one LWP of PTID. */ |
687 | ||
84346e11 | 688 | static void |
9f0bdab8 | 689 | i386_linux_dr_set (ptid_t ptid, int regnum, unsigned long value) |
84346e11 MK |
690 | { |
691 | int tid; | |
692 | ||
9f0bdab8 DJ |
693 | tid = TIDGET (ptid); |
694 | if (tid == 0) | |
695 | tid = PIDGET (ptid); | |
84346e11 MK |
696 | |
697 | errno = 0; | |
ce556f85 | 698 | ptrace (PTRACE_POKEUSER, tid, |
84346e11 MK |
699 | offsetof (struct user, u_debugreg[regnum]), value); |
700 | if (errno != 0) | |
e2e0b3e5 | 701 | perror_with_name (_("Couldn't write debug register")); |
84346e11 MK |
702 | } |
703 | ||
a79d3c27 JK |
704 | /* Set DR_CONTROL to ADDR in all LWPs of LWP_LIST. */ |
705 | ||
9bb9e8ad | 706 | static void |
7bf0983e | 707 | i386_linux_dr_set_control (unsigned long control) |
84346e11 | 708 | { |
9f0bdab8 DJ |
709 | struct lwp_info *lp; |
710 | ptid_t ptid; | |
711 | ||
712 | i386_linux_dr[DR_CONTROL] = control; | |
713 | ALL_LWPS (lp, ptid) | |
714 | i386_linux_dr_set (ptid, DR_CONTROL, control); | |
84346e11 MK |
715 | } |
716 | ||
a79d3c27 JK |
717 | /* Set address REGNUM (zero based) to ADDR in all LWPs of LWP_LIST. */ |
718 | ||
9bb9e8ad | 719 | static void |
84346e11 MK |
720 | i386_linux_dr_set_addr (int regnum, CORE_ADDR addr) |
721 | { | |
9f0bdab8 DJ |
722 | struct lwp_info *lp; |
723 | ptid_t ptid; | |
724 | ||
84346e11 MK |
725 | gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); |
726 | ||
9f0bdab8 DJ |
727 | i386_linux_dr[DR_FIRSTADDR + regnum] = addr; |
728 | ALL_LWPS (lp, ptid) | |
729 | i386_linux_dr_set (ptid, DR_FIRSTADDR + regnum, addr); | |
84346e11 MK |
730 | } |
731 | ||
a79d3c27 JK |
732 | /* Set address REGNUM (zero based) to zero in all LWPs of LWP_LIST. */ |
733 | ||
9bb9e8ad | 734 | static void |
84346e11 MK |
735 | i386_linux_dr_reset_addr (int regnum) |
736 | { | |
9f0bdab8 | 737 | i386_linux_dr_set_addr (regnum, 0); |
84346e11 MK |
738 | } |
739 | ||
a79d3c27 JK |
740 | /* Get DR_STATUS from only the one LWP of INFERIOR_PTID. */ |
741 | ||
9bb9e8ad | 742 | static unsigned long |
84346e11 MK |
743 | i386_linux_dr_get_status (void) |
744 | { | |
9f0bdab8 DJ |
745 | return i386_linux_dr_get (inferior_ptid, DR_STATUS); |
746 | } | |
747 | ||
a79d3c27 JK |
748 | /* Unset MASK bits in DR_STATUS in all LWPs of LWP_LIST. */ |
749 | ||
750 | static void | |
751 | i386_linux_dr_unset_status (unsigned long mask) | |
752 | { | |
753 | struct lwp_info *lp; | |
754 | ptid_t ptid; | |
755 | ||
756 | ALL_LWPS (lp, ptid) | |
757 | { | |
758 | unsigned long value; | |
759 | ||
760 | value = i386_linux_dr_get (ptid, DR_STATUS); | |
761 | value &= ~mask; | |
762 | i386_linux_dr_set (ptid, DR_STATUS, value); | |
763 | } | |
764 | } | |
765 | ||
9f0bdab8 DJ |
766 | static void |
767 | i386_linux_new_thread (ptid_t ptid) | |
768 | { | |
769 | int i; | |
770 | ||
771 | for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) | |
772 | i386_linux_dr_set (ptid, i, i386_linux_dr[i]); | |
773 | ||
774 | i386_linux_dr_set (ptid, DR_CONTROL, i386_linux_dr[DR_CONTROL]); | |
84346e11 MK |
775 | } |
776 | \f | |
777 | ||
5bca7895 MK |
778 | /* Called by libthread_db. Returns a pointer to the thread local |
779 | storage (or its descriptor). */ | |
780 | ||
781 | ps_err_e | |
782 | ps_get_thread_area (const struct ps_prochandle *ph, | |
783 | lwpid_t lwpid, int idx, void **base) | |
784 | { | |
785 | /* NOTE: cagney/2003-08-26: The definition of this buffer is found | |
786 | in the kernel header <asm-i386/ldt.h>. It, after padding, is 4 x | |
787 | 4 byte integers in size: `entry_number', `base_addr', `limit', | |
788 | and a bunch of status bits. | |
789 | ||
790 | The values returned by this ptrace call should be part of the | |
791 | regcache buffer, and ps_get_thread_area should channel its | |
792 | request through the regcache. That way remote targets could | |
793 | provide the value using the remote protocol and not this direct | |
794 | call. | |
795 | ||
796 | Is this function needed? I'm guessing that the `base' is the | |
766062f6 | 797 | address of a descriptor that libthread_db uses to find the |
b2fa5097 | 798 | thread local address base that GDB needs. Perhaps that |
5bca7895 MK |
799 | descriptor is defined by the ABI. Anyway, given that |
800 | libthread_db calls this function without prompting (gdb | |
801 | requesting tls base) I guess it needs info in there anyway. */ | |
802 | unsigned int desc[4]; | |
803 | gdb_assert (sizeof (int) == 4); | |
804 | ||
805 | #ifndef PTRACE_GET_THREAD_AREA | |
806 | #define PTRACE_GET_THREAD_AREA 25 | |
807 | #endif | |
808 | ||
809 | if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, | |
810 | (void *) idx, (unsigned long) &desc) < 0) | |
811 | return PS_ERR; | |
812 | ||
813 | *(int *)base = desc[1]; | |
814 | return PS_OK; | |
815 | } | |
816 | \f | |
817 | ||
a4b6fc86 | 818 | /* The instruction for a GNU/Linux system call is: |
a6abb2c0 MK |
819 | int $0x80 |
820 | or 0xcd 0x80. */ | |
821 | ||
822 | static const unsigned char linux_syscall[] = { 0xcd, 0x80 }; | |
823 | ||
824 | #define LINUX_SYSCALL_LEN (sizeof linux_syscall) | |
825 | ||
826 | /* The system call number is stored in the %eax register. */ | |
7532965f | 827 | #define LINUX_SYSCALL_REGNUM I386_EAX_REGNUM |
a6abb2c0 MK |
828 | |
829 | /* We are specifically interested in the sigreturn and rt_sigreturn | |
830 | system calls. */ | |
831 | ||
832 | #ifndef SYS_sigreturn | |
833 | #define SYS_sigreturn 0x77 | |
834 | #endif | |
835 | #ifndef SYS_rt_sigreturn | |
836 | #define SYS_rt_sigreturn 0xad | |
837 | #endif | |
838 | ||
839 | /* Offset to saved processor flags, from <asm/sigcontext.h>. */ | |
840 | #define LINUX_SIGCONTEXT_EFLAGS_OFFSET (64) | |
841 | ||
842 | /* Resume execution of the inferior process. | |
843 | If STEP is nonzero, single-step it. | |
844 | If SIGNAL is nonzero, give it that signal. */ | |
845 | ||
10d6c8cd | 846 | static void |
28439f5e PA |
847 | i386_linux_resume (struct target_ops *ops, |
848 | ptid_t ptid, int step, enum target_signal signal) | |
a6abb2c0 | 849 | { |
39f77062 KB |
850 | int pid = PIDGET (ptid); |
851 | ||
a96d9b2e SDJ |
852 | int request; |
853 | ||
854 | if (catch_syscall_enabled () > 0) | |
855 | request = PTRACE_SYSCALL; | |
856 | else | |
857 | request = PTRACE_CONT; | |
a6abb2c0 | 858 | |
a6abb2c0 MK |
859 | if (step) |
860 | { | |
594f7785 | 861 | struct regcache *regcache = get_thread_regcache (pid_to_ptid (pid)); |
e17a4113 UW |
862 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
863 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
7b86a1b8 | 864 | ULONGEST pc; |
8e70166d | 865 | gdb_byte buf[LINUX_SYSCALL_LEN]; |
a6abb2c0 MK |
866 | |
867 | request = PTRACE_SINGLESTEP; | |
868 | ||
e17a4113 UW |
869 | regcache_cooked_read_unsigned (regcache, |
870 | gdbarch_pc_regnum (gdbarch), &pc); | |
7b86a1b8 | 871 | |
a6abb2c0 MK |
872 | /* Returning from a signal trampoline is done by calling a |
873 | special system call (sigreturn or rt_sigreturn, see | |
874 | i386-linux-tdep.c for more information). This system call | |
875 | restores the registers that were saved when the signal was | |
876 | raised, including %eflags. That means that single-stepping | |
877 | won't work. Instead, we'll have to modify the signal context | |
878 | that's about to be restored, and set the trace flag there. */ | |
879 | ||
880 | /* First check if PC is at a system call. */ | |
8defab1a | 881 | if (target_read_memory (pc, buf, LINUX_SYSCALL_LEN) == 0 |
a6abb2c0 MK |
882 | && memcmp (buf, linux_syscall, LINUX_SYSCALL_LEN) == 0) |
883 | { | |
7b86a1b8 UW |
884 | ULONGEST syscall; |
885 | regcache_cooked_read_unsigned (regcache, | |
886 | LINUX_SYSCALL_REGNUM, &syscall); | |
a6abb2c0 MK |
887 | |
888 | /* Then check the system call number. */ | |
889 | if (syscall == SYS_sigreturn || syscall == SYS_rt_sigreturn) | |
890 | { | |
7b86a1b8 | 891 | ULONGEST sp, addr; |
a6abb2c0 | 892 | unsigned long int eflags; |
7bf0983e | 893 | |
7b86a1b8 | 894 | regcache_cooked_read_unsigned (regcache, I386_ESP_REGNUM, &sp); |
a6abb2c0 | 895 | if (syscall == SYS_rt_sigreturn) |
e17a4113 | 896 | addr = read_memory_integer (sp + 8, 4, byte_order) + 20; |
7b86a1b8 UW |
897 | else |
898 | addr = sp; | |
a6abb2c0 MK |
899 | |
900 | /* Set the trace flag in the context that's about to be | |
901 | restored. */ | |
902 | addr += LINUX_SIGCONTEXT_EFLAGS_OFFSET; | |
8e70166d | 903 | read_memory (addr, (gdb_byte *) &eflags, 4); |
a6abb2c0 | 904 | eflags |= 0x0100; |
8e70166d | 905 | write_memory (addr, (gdb_byte *) &eflags, 4); |
a6abb2c0 MK |
906 | } |
907 | } | |
908 | } | |
909 | ||
910 | if (ptrace (request, pid, 0, target_signal_to_host (signal)) == -1) | |
e2e0b3e5 | 911 | perror_with_name (("ptrace")); |
a6abb2c0 | 912 | } |
4de4c07c | 913 | |
10d6c8cd DJ |
914 | static void (*super_post_startup_inferior) (ptid_t ptid); |
915 | ||
916 | static void | |
917 | i386_linux_child_post_startup_inferior (ptid_t ptid) | |
4de4c07c DJ |
918 | { |
919 | i386_cleanup_dregs (); | |
10d6c8cd DJ |
920 | super_post_startup_inferior (ptid); |
921 | } | |
922 | ||
90884b2b L |
923 | /* Get Linux/x86 target description from running target. */ |
924 | ||
925 | static const struct target_desc * | |
926 | i386_linux_read_description (struct target_ops *ops) | |
927 | { | |
3a13a53b | 928 | int tid; |
c131fcee L |
929 | static uint64_t xcr0; |
930 | ||
3a13a53b L |
931 | /* GNU/Linux LWP ID's are process ID's. */ |
932 | tid = TIDGET (inferior_ptid); | |
933 | if (tid == 0) | |
934 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
935 | ||
936 | #ifdef HAVE_PTRACE_GETFPXREGS | |
937 | if (have_ptrace_getfpxregs == -1) | |
938 | { | |
939 | elf_fpxregset_t fpxregs; | |
940 | ||
941 | if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0) | |
942 | { | |
943 | have_ptrace_getfpxregs = 0; | |
944 | have_ptrace_getregset = 0; | |
945 | return tdesc_i386_mmx_linux; | |
946 | } | |
947 | } | |
948 | #endif | |
949 | ||
c131fcee L |
950 | if (have_ptrace_getregset == -1) |
951 | { | |
c131fcee L |
952 | uint64_t xstateregs[(I386_XSTATE_SSE_SIZE / sizeof (uint64_t))]; |
953 | struct iovec iov; | |
954 | ||
c131fcee L |
955 | iov.iov_base = xstateregs; |
956 | iov.iov_len = sizeof (xstateregs); | |
957 | ||
958 | /* Check if PTRACE_GETREGSET works. */ | |
959 | if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE, | |
960 | &iov) < 0) | |
961 | have_ptrace_getregset = 0; | |
962 | else | |
963 | { | |
964 | have_ptrace_getregset = 1; | |
965 | ||
966 | /* Get XCR0 from XSAVE extended state. */ | |
967 | xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET | |
968 | / sizeof (long long))]; | |
969 | } | |
970 | } | |
971 | ||
972 | /* Check the native XCR0 only if PTRACE_GETREGSET is available. */ | |
973 | if (have_ptrace_getregset | |
974 | && (xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK) | |
975 | return tdesc_i386_avx_linux; | |
976 | else | |
977 | return tdesc_i386_linux; | |
90884b2b L |
978 | } |
979 | ||
10d6c8cd DJ |
980 | void |
981 | _initialize_i386_linux_nat (void) | |
982 | { | |
983 | struct target_ops *t; | |
984 | ||
985 | /* Fill in the generic GNU/Linux methods. */ | |
986 | t = linux_target (); | |
987 | ||
c03374d5 DJ |
988 | i386_use_watchpoints (t); |
989 | ||
9bb9e8ad PM |
990 | i386_dr_low.set_control = i386_linux_dr_set_control; |
991 | i386_dr_low.set_addr = i386_linux_dr_set_addr; | |
992 | i386_dr_low.reset_addr = i386_linux_dr_reset_addr; | |
993 | i386_dr_low.get_status = i386_linux_dr_get_status; | |
a79d3c27 | 994 | i386_dr_low.unset_status = i386_linux_dr_unset_status; |
9bb9e8ad PM |
995 | i386_set_debug_register_length (4); |
996 | ||
10d6c8cd DJ |
997 | /* Override the default ptrace resume method. */ |
998 | t->to_resume = i386_linux_resume; | |
999 | ||
1000 | /* Override the GNU/Linux inferior startup hook. */ | |
1001 | super_post_startup_inferior = t->to_post_startup_inferior; | |
1002 | t->to_post_startup_inferior = i386_linux_child_post_startup_inferior; | |
1003 | ||
1004 | /* Add our register access methods. */ | |
1005 | t->to_fetch_registers = i386_linux_fetch_inferior_registers; | |
1006 | t->to_store_registers = i386_linux_store_inferior_registers; | |
1007 | ||
90884b2b L |
1008 | t->to_read_description = i386_linux_read_description; |
1009 | ||
10d6c8cd | 1010 | /* Register the target. */ |
f973ed9c | 1011 | linux_nat_add_target (t); |
9f0bdab8 | 1012 | linux_nat_set_new_thread (t, i386_linux_new_thread); |
4de4c07c | 1013 | } |