Commit | Line | Data |
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a4b6fc86 | 1 | /* Native-dependent code for GNU/Linux x86-64. |
0a65a603 | 2 | |
28e7fd62 | 3 | Copyright (C) 2001-2013 Free Software Foundation, Inc. |
53e95fcf JS |
4 | Contributed by Jiri Smid, SuSE Labs. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
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 |
53e95fcf JS |
11 | (at your option) any later version. |
12 | ||
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. | |
17 | ||
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/>. */ |
53e95fcf JS |
20 | |
21 | #include "defs.h" | |
22 | #include "inferior.h" | |
23 | #include "gdbcore.h" | |
24 | #include "regcache.h" | |
a055a187 | 25 | #include "regset.h" |
4056d258 | 26 | #include "linux-nat.h" |
8695c747 | 27 | #include "amd64-linux-tdep.h" |
3e3aea48 MM |
28 | #include "linux-btrace.h" |
29 | #include "btrace.h" | |
c4f35dd8 | 30 | |
53e95fcf | 31 | #include "gdb_assert.h" |
30d52491 | 32 | #include "gdb_string.h" |
a055a187 L |
33 | #include "elf/common.h" |
34 | #include <sys/uio.h> | |
53e95fcf JS |
35 | #include <sys/ptrace.h> |
36 | #include <sys/debugreg.h> | |
37 | #include <sys/syscall.h> | |
38 | #include <sys/procfs.h> | |
6fea9e18 | 39 | #include <sys/user.h> |
c43af07c EZ |
40 | #include <asm/prctl.h> |
41 | /* FIXME ezannoni-2003-07-09: we need <sys/reg.h> to be included after | |
42 | <asm/ptrace.h> because the latter redefines FS and GS for no apparent | |
43 | reason, and those definitions don't match the ones that libpthread_db | |
44 | uses, which come from <sys/reg.h>. */ | |
0963b4bd | 45 | /* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have |
c43af07c EZ |
46 | been removed from ptrace.h in the kernel. However, better safe than |
47 | sorry. */ | |
48 | #include <asm/ptrace.h> | |
33a0a2ac | 49 | #include <sys/reg.h> |
c43af07c | 50 | #include "gdb_proc_service.h" |
33a0a2ac | 51 | |
c4f35dd8 MK |
52 | /* Prototypes for supply_gregset etc. */ |
53 | #include "gregset.h" | |
54 | ||
9c1488cb | 55 | #include "amd64-tdep.h" |
60fac5b8 MK |
56 | #include "i386-linux-tdep.h" |
57 | #include "amd64-nat.h" | |
9bb9e8ad | 58 | #include "i386-nat.h" |
a055a187 L |
59 | #include "i386-xstate.h" |
60 | ||
61 | #ifndef PTRACE_GETREGSET | |
62 | #define PTRACE_GETREGSET 0x4204 | |
63 | #endif | |
64 | ||
65 | #ifndef PTRACE_SETREGSET | |
66 | #define PTRACE_SETREGSET 0x4205 | |
67 | #endif | |
68 | ||
7b50312a PA |
69 | /* Per-thread arch-specific data we want to keep. */ |
70 | ||
71 | struct arch_lwp_info | |
72 | { | |
73 | /* Non-zero if our copy differs from what's recorded in the thread. */ | |
74 | int debug_registers_changed; | |
75 | }; | |
76 | ||
a055a187 L |
77 | /* Does the current host support PTRACE_GETREGSET? */ |
78 | static int have_ptrace_getregset = -1; | |
60fac5b8 | 79 | |
60fac5b8 MK |
80 | /* Mapping between the general-purpose registers in GNU/Linux x86-64 |
81 | `struct user' format and GDB's register cache layout for GNU/Linux | |
82 | i386. | |
83 | ||
84 | Note that most GNU/Linux x86-64 registers are 64-bit, while the | |
85 | GNU/Linux i386 registers are all 32-bit, but since we're | |
86 | little-endian we get away with that. */ | |
87 | ||
88 | /* From <sys/reg.h> on GNU/Linux i386. */ | |
430eaf2e | 89 | static int amd64_linux_gregset32_reg_offset[] = |
60fac5b8 | 90 | { |
f5859b4d MK |
91 | RAX * 8, RCX * 8, /* %eax, %ecx */ |
92 | RDX * 8, RBX * 8, /* %edx, %ebx */ | |
93 | RSP * 8, RBP * 8, /* %esp, %ebp */ | |
94 | RSI * 8, RDI * 8, /* %esi, %edi */ | |
95 | RIP * 8, EFLAGS * 8, /* %eip, %eflags */ | |
96 | CS * 8, SS * 8, /* %cs, %ss */ | |
97 | DS * 8, ES * 8, /* %ds, %es */ | |
98 | FS * 8, GS * 8, /* %fs, %gs */ | |
60fac5b8 MK |
99 | -1, -1, -1, -1, -1, -1, -1, -1, |
100 | -1, -1, -1, -1, -1, -1, -1, -1, | |
101 | -1, -1, -1, -1, -1, -1, -1, -1, -1, | |
a055a187 | 102 | -1, -1, -1, -1, -1, -1, -1, -1, |
f5859b4d | 103 | ORIG_RAX * 8 /* "orig_eax" */ |
60fac5b8 | 104 | }; |
53e95fcf JS |
105 | \f |
106 | ||
107 | /* Transfering the general-purpose registers between GDB, inferiors | |
108 | and core files. */ | |
109 | ||
60fac5b8 | 110 | /* Fill GDB's register cache with the general-purpose register values |
53e95fcf JS |
111 | in *GREGSETP. */ |
112 | ||
113 | void | |
7f7fe91e | 114 | supply_gregset (struct regcache *regcache, const elf_gregset_t *gregsetp) |
53e95fcf | 115 | { |
7f7fe91e | 116 | amd64_supply_native_gregset (regcache, gregsetp, -1); |
53e95fcf JS |
117 | } |
118 | ||
60fac5b8 MK |
119 | /* Fill register REGNUM (if it is a general-purpose register) in |
120 | *GREGSETP with the value in GDB's register cache. If REGNUM is -1, | |
53e95fcf JS |
121 | do this for all registers. */ |
122 | ||
123 | void | |
7f7fe91e UW |
124 | fill_gregset (const struct regcache *regcache, |
125 | elf_gregset_t *gregsetp, int regnum) | |
53e95fcf | 126 | { |
7f7fe91e | 127 | amd64_collect_native_gregset (regcache, gregsetp, regnum); |
53e95fcf JS |
128 | } |
129 | ||
53e95fcf JS |
130 | /* Transfering floating-point registers between GDB, inferiors and cores. */ |
131 | ||
60fac5b8 | 132 | /* Fill GDB's register cache with the floating-point and SSE register |
c4f35dd8 | 133 | values in *FPREGSETP. */ |
53e95fcf JS |
134 | |
135 | void | |
7f7fe91e | 136 | supply_fpregset (struct regcache *regcache, const elf_fpregset_t *fpregsetp) |
53e95fcf | 137 | { |
7f7fe91e | 138 | amd64_supply_fxsave (regcache, -1, fpregsetp); |
53e95fcf JS |
139 | } |
140 | ||
8dda9770 | 141 | /* Fill register REGNUM (if it is a floating-point or SSE register) in |
60fac5b8 | 142 | *FPREGSETP with the value in GDB's register cache. If REGNUM is |
c4f35dd8 | 143 | -1, do this for all registers. */ |
53e95fcf JS |
144 | |
145 | void | |
7f7fe91e UW |
146 | fill_fpregset (const struct regcache *regcache, |
147 | elf_fpregset_t *fpregsetp, int regnum) | |
53e95fcf | 148 | { |
7f7fe91e | 149 | amd64_collect_fxsave (regcache, regnum, fpregsetp); |
53e95fcf | 150 | } |
53e95fcf JS |
151 | \f |
152 | ||
153 | /* Transferring arbitrary registers between GDB and inferior. */ | |
154 | ||
60fac5b8 | 155 | /* Fetch register REGNUM from the child process. If REGNUM is -1, do |
53e95fcf JS |
156 | this for all registers (including the floating point and SSE |
157 | registers). */ | |
158 | ||
10d6c8cd | 159 | static void |
28439f5e PA |
160 | amd64_linux_fetch_inferior_registers (struct target_ops *ops, |
161 | struct regcache *regcache, int regnum) | |
53e95fcf | 162 | { |
f8028488 | 163 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
164 | int tid; |
165 | ||
a4b6fc86 | 166 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
167 | tid = TIDGET (inferior_ptid); |
168 | if (tid == 0) | |
169 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 170 | |
f8028488 | 171 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 172 | { |
99679982 MK |
173 | elf_gregset_t regs; |
174 | ||
175 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 176 | perror_with_name (_("Couldn't get registers")); |
99679982 | 177 | |
56be3814 | 178 | amd64_supply_native_gregset (regcache, ®s, -1); |
60fac5b8 MK |
179 | if (regnum != -1) |
180 | return; | |
53e95fcf JS |
181 | } |
182 | ||
f8028488 | 183 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 184 | { |
99679982 | 185 | elf_fpregset_t fpregs; |
53e95fcf | 186 | |
a055a187 L |
187 | if (have_ptrace_getregset) |
188 | { | |
189 | char xstateregs[I386_XSTATE_MAX_SIZE]; | |
190 | struct iovec iov; | |
191 | ||
192 | iov.iov_base = xstateregs; | |
193 | iov.iov_len = sizeof (xstateregs); | |
194 | if (ptrace (PTRACE_GETREGSET, tid, | |
195 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
196 | perror_with_name (_("Couldn't get extended state status")); | |
99679982 | 197 | |
a055a187 L |
198 | amd64_supply_xsave (regcache, -1, xstateregs); |
199 | } | |
200 | else | |
201 | { | |
202 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) | |
203 | perror_with_name (_("Couldn't get floating point status")); | |
204 | ||
205 | amd64_supply_fxsave (regcache, -1, &fpregs); | |
206 | } | |
99679982 | 207 | } |
53e95fcf JS |
208 | } |
209 | ||
60fac5b8 MK |
210 | /* Store register REGNUM back into the child process. If REGNUM is |
211 | -1, do this for all registers (including the floating-point and SSE | |
53e95fcf | 212 | registers). */ |
c4f35dd8 | 213 | |
10d6c8cd | 214 | static void |
28439f5e PA |
215 | amd64_linux_store_inferior_registers (struct target_ops *ops, |
216 | struct regcache *regcache, int regnum) | |
53e95fcf | 217 | { |
f8028488 | 218 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
53e95fcf JS |
219 | int tid; |
220 | ||
a4b6fc86 | 221 | /* GNU/Linux LWP ID's are process ID's. */ |
c4f35dd8 MK |
222 | tid = TIDGET (inferior_ptid); |
223 | if (tid == 0) | |
224 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
53e95fcf | 225 | |
f8028488 | 226 | if (regnum == -1 || amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 227 | { |
99679982 MK |
228 | elf_gregset_t regs; |
229 | ||
230 | if (ptrace (PTRACE_GETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 231 | perror_with_name (_("Couldn't get registers")); |
99679982 | 232 | |
56be3814 | 233 | amd64_collect_native_gregset (regcache, ®s, regnum); |
99679982 MK |
234 | |
235 | if (ptrace (PTRACE_SETREGS, tid, 0, (long) ®s) < 0) | |
edefbb7c | 236 | perror_with_name (_("Couldn't write registers")); |
99679982 | 237 | |
60fac5b8 MK |
238 | if (regnum != -1) |
239 | return; | |
53e95fcf JS |
240 | } |
241 | ||
f8028488 | 242 | if (regnum == -1 || !amd64_native_gregset_supplies_p (gdbarch, regnum)) |
53e95fcf | 243 | { |
99679982 MK |
244 | elf_fpregset_t fpregs; |
245 | ||
a055a187 L |
246 | if (have_ptrace_getregset) |
247 | { | |
248 | char xstateregs[I386_XSTATE_MAX_SIZE]; | |
249 | struct iovec iov; | |
250 | ||
251 | iov.iov_base = xstateregs; | |
252 | iov.iov_len = sizeof (xstateregs); | |
253 | if (ptrace (PTRACE_GETREGSET, tid, | |
254 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
255 | perror_with_name (_("Couldn't get extended state status")); | |
99679982 | 256 | |
a055a187 L |
257 | amd64_collect_xsave (regcache, regnum, xstateregs, 0); |
258 | ||
259 | if (ptrace (PTRACE_SETREGSET, tid, | |
260 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
261 | perror_with_name (_("Couldn't write extended state status")); | |
262 | } | |
263 | else | |
264 | { | |
265 | if (ptrace (PTRACE_GETFPREGS, tid, 0, (long) &fpregs) < 0) | |
266 | perror_with_name (_("Couldn't get floating point status")); | |
99679982 | 267 | |
a055a187 | 268 | amd64_collect_fxsave (regcache, regnum, &fpregs); |
99679982 | 269 | |
a055a187 L |
270 | if (ptrace (PTRACE_SETFPREGS, tid, 0, (long) &fpregs) < 0) |
271 | perror_with_name (_("Couldn't write floating point status")); | |
272 | } | |
53e95fcf | 273 | } |
53e95fcf JS |
274 | } |
275 | \f | |
9f0bdab8 DJ |
276 | /* Support for debug registers. */ |
277 | ||
c4f35dd8 | 278 | static unsigned long |
9f0bdab8 | 279 | amd64_linux_dr_get (ptid_t ptid, int regnum) |
c4f35dd8 MK |
280 | { |
281 | int tid; | |
282 | unsigned long value; | |
53e95fcf | 283 | |
9f0bdab8 DJ |
284 | tid = TIDGET (ptid); |
285 | if (tid == 0) | |
286 | tid = PIDGET (ptid); | |
53e95fcf | 287 | |
c4f35dd8 | 288 | errno = 0; |
9f0bdab8 | 289 | value = ptrace (PTRACE_PEEKUSER, tid, |
c4f35dd8 MK |
290 | offsetof (struct user, u_debugreg[regnum]), 0); |
291 | if (errno != 0) | |
edefbb7c | 292 | perror_with_name (_("Couldn't read debug register")); |
53e95fcf | 293 | |
c4f35dd8 MK |
294 | return value; |
295 | } | |
53e95fcf | 296 | |
a79d3c27 JK |
297 | /* Set debug register REGNUM to VALUE in only the one LWP of PTID. */ |
298 | ||
53e95fcf | 299 | static void |
9f0bdab8 | 300 | amd64_linux_dr_set (ptid_t ptid, int regnum, unsigned long value) |
53e95fcf | 301 | { |
c4f35dd8 | 302 | int tid; |
53e95fcf | 303 | |
9f0bdab8 DJ |
304 | tid = TIDGET (ptid); |
305 | if (tid == 0) | |
306 | tid = PIDGET (ptid); | |
53e95fcf | 307 | |
c4f35dd8 | 308 | errno = 0; |
9f0bdab8 DJ |
309 | ptrace (PTRACE_POKEUSER, tid, |
310 | offsetof (struct user, u_debugreg[regnum]), value); | |
c4f35dd8 | 311 | if (errno != 0) |
edefbb7c | 312 | perror_with_name (_("Couldn't write debug register")); |
c4f35dd8 | 313 | } |
53e95fcf | 314 | |
7b50312a | 315 | /* Return the inferior's debug register REGNUM. */ |
a79d3c27 | 316 | |
7b50312a PA |
317 | static CORE_ADDR |
318 | amd64_linux_dr_get_addr (int regnum) | |
c4f35dd8 | 319 | { |
7b50312a PA |
320 | /* DR6 and DR7 are retrieved with some other way. */ |
321 | gdb_assert (DR_FIRSTADDR <= regnum && regnum <= DR_LASTADDR); | |
9f0bdab8 | 322 | |
7b50312a | 323 | return amd64_linux_dr_get (inferior_ptid, regnum); |
c4f35dd8 | 324 | } |
53e95fcf | 325 | |
7b50312a | 326 | /* Return the inferior's DR7 debug control register. */ |
a79d3c27 | 327 | |
7b50312a PA |
328 | static unsigned long |
329 | amd64_linux_dr_get_control (void) | |
b7c4cbf8 | 330 | { |
7b50312a PA |
331 | return amd64_linux_dr_get (inferior_ptid, DR_CONTROL); |
332 | } | |
9f0bdab8 | 333 | |
7b50312a PA |
334 | /* Get DR_STATUS from only the one LWP of INFERIOR_PTID. */ |
335 | ||
336 | static unsigned long | |
337 | amd64_linux_dr_get_status (void) | |
338 | { | |
339 | return amd64_linux_dr_get (inferior_ptid, DR_STATUS); | |
340 | } | |
341 | ||
26cb8b7c PA |
342 | /* Callback for iterate_over_lwps. Update the debug registers of |
343 | LWP. */ | |
7b50312a PA |
344 | |
345 | static int | |
346 | update_debug_registers_callback (struct lwp_info *lwp, void *arg) | |
347 | { | |
6e012a6c PA |
348 | if (lwp->arch_private == NULL) |
349 | lwp->arch_private = XCNEW (struct arch_lwp_info); | |
350 | ||
7b50312a PA |
351 | /* The actual update is done later just before resuming the lwp, we |
352 | just mark that the registers need updating. */ | |
353 | lwp->arch_private->debug_registers_changed = 1; | |
354 | ||
355 | /* If the lwp isn't stopped, force it to momentarily pause, so we | |
356 | can update its debug registers. */ | |
357 | if (!lwp->stopped) | |
358 | linux_stop_lwp (lwp); | |
c4f35dd8 | 359 | |
8da828f7 | 360 | /* Continue the iteration. */ |
7b50312a | 361 | return 0; |
b7c4cbf8 AJ |
362 | } |
363 | ||
7b50312a | 364 | /* Set DR_CONTROL to CONTROL in all LWPs of the current inferior. */ |
a79d3c27 | 365 | |
9bb9e8ad | 366 | static void |
7b50312a | 367 | amd64_linux_dr_set_control (unsigned long control) |
53e95fcf | 368 | { |
26cb8b7c PA |
369 | ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); |
370 | ||
371 | iterate_over_lwps (pid_ptid, update_debug_registers_callback, NULL); | |
53e95fcf | 372 | } |
8cfda98c | 373 | |
7b50312a PA |
374 | /* Set address REGNUM (zero based) to ADDR in all LWPs of the current |
375 | inferior. */ | |
a79d3c27 | 376 | |
7b50312a PA |
377 | static void |
378 | amd64_linux_dr_set_addr (int regnum, CORE_ADDR addr) | |
8cfda98c | 379 | { |
26cb8b7c PA |
380 | ptid_t pid_ptid = pid_to_ptid (ptid_get_pid (inferior_ptid)); |
381 | ||
7b50312a PA |
382 | gdb_assert (regnum >= 0 && regnum <= DR_LASTADDR - DR_FIRSTADDR); |
383 | ||
26cb8b7c | 384 | iterate_over_lwps (pid_ptid, update_debug_registers_callback, NULL); |
9f0bdab8 DJ |
385 | } |
386 | ||
7b50312a PA |
387 | /* Called when resuming a thread. |
388 | If the debug regs have changed, update the thread's copies. */ | |
a79d3c27 JK |
389 | |
390 | static void | |
7b50312a | 391 | amd64_linux_prepare_to_resume (struct lwp_info *lwp) |
a79d3c27 | 392 | { |
7b50312a | 393 | int clear_status = 0; |
a79d3c27 | 394 | |
6e012a6c PA |
395 | /* NULL means this is the main thread still going through the shell, |
396 | or, no watchpoint has been set yet. In that case, there's | |
397 | nothing to do. */ | |
398 | if (lwp->arch_private == NULL) | |
399 | return; | |
400 | ||
7b50312a | 401 | if (lwp->arch_private->debug_registers_changed) |
a79d3c27 | 402 | { |
26cb8b7c PA |
403 | struct i386_debug_reg_state *state |
404 | = i386_debug_reg_state (ptid_get_pid (lwp->ptid)); | |
7b50312a PA |
405 | int i; |
406 | ||
4403d8e9 JK |
407 | /* On Linux kernel before 2.6.33 commit |
408 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
409 | if you enable a breakpoint by the DR_CONTROL bits you need to have | |
410 | already written the corresponding DR_FIRSTADDR...DR_LASTADDR registers. | |
411 | ||
412 | Ensure DR_CONTROL gets written as the very last register here. */ | |
413 | ||
7b50312a PA |
414 | for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++) |
415 | if (state->dr_ref_count[i] > 0) | |
416 | { | |
417 | amd64_linux_dr_set (lwp->ptid, i, state->dr_mirror[i]); | |
418 | ||
419 | /* If we're setting a watchpoint, any change the inferior | |
420 | had done itself to the debug registers needs to be | |
421 | discarded, otherwise, i386_stopped_data_address can get | |
422 | confused. */ | |
423 | clear_status = 1; | |
424 | } | |
425 | ||
426 | amd64_linux_dr_set (lwp->ptid, DR_CONTROL, state->dr_control_mirror); | |
427 | ||
428 | lwp->arch_private->debug_registers_changed = 0; | |
a79d3c27 | 429 | } |
a79d3c27 | 430 | |
7b50312a PA |
431 | if (clear_status || lwp->stopped_by_watchpoint) |
432 | amd64_linux_dr_set (lwp->ptid, DR_STATUS, 0); | |
433 | } | |
a79d3c27 | 434 | |
9f0bdab8 | 435 | static void |
7b50312a | 436 | amd64_linux_new_thread (struct lwp_info *lp) |
9f0bdab8 | 437 | { |
7b50312a | 438 | struct arch_lwp_info *info = XCNEW (struct arch_lwp_info); |
9f0bdab8 | 439 | |
7b50312a | 440 | info->debug_registers_changed = 1; |
9f0bdab8 | 441 | |
7b50312a | 442 | lp->arch_private = info; |
8cfda98c | 443 | } |
26cb8b7c PA |
444 | |
445 | /* linux_nat_new_fork hook. */ | |
446 | ||
447 | static void | |
448 | amd64_linux_new_fork (struct lwp_info *parent, pid_t child_pid) | |
449 | { | |
450 | pid_t parent_pid; | |
451 | struct i386_debug_reg_state *parent_state; | |
452 | struct i386_debug_reg_state *child_state; | |
453 | ||
454 | /* NULL means no watchpoint has ever been set in the parent. In | |
455 | that case, there's nothing to do. */ | |
456 | if (parent->arch_private == NULL) | |
457 | return; | |
458 | ||
459 | /* Linux kernel before 2.6.33 commit | |
460 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
461 | will inherit hardware debug registers from parent | |
462 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
463 | zeroed debug registers. | |
464 | ||
465 | GDB core assumes the child inherits the watchpoints/hw | |
466 | breakpoints of the parent, and will remove them all from the | |
467 | forked off process. Copy the debug registers mirrors into the | |
468 | new process so that all breakpoints and watchpoints can be | |
469 | removed together. The debug registers mirror will become zeroed | |
470 | in the end before detaching the forked off process, thus making | |
471 | this compatible with older Linux kernels too. */ | |
472 | ||
473 | parent_pid = ptid_get_pid (parent->ptid); | |
474 | parent_state = i386_debug_reg_state (parent_pid); | |
475 | child_state = i386_debug_reg_state (child_pid); | |
476 | *child_state = *parent_state; | |
477 | } | |
478 | ||
5bca7895 | 479 | \f |
c43af07c | 480 | |
50d71875 AC |
481 | /* This function is called by libthread_db as part of its handling of |
482 | a request for a thread's local storage address. */ | |
483 | ||
5bca7895 | 484 | ps_err_e |
c43af07c EZ |
485 | ps_get_thread_area (const struct ps_prochandle *ph, |
486 | lwpid_t lwpid, int idx, void **base) | |
487 | { | |
f5656ead | 488 | if (gdbarch_bfd_arch_info (target_gdbarch ())->bits_per_word == 32) |
50d71875 AC |
489 | { |
490 | /* The full structure is found in <asm-i386/ldt.h>. The second | |
491 | integer is the LDT's base_address and that is used to locate | |
492 | the thread's local storage. See i386-linux-nat.c more | |
493 | info. */ | |
494 | unsigned int desc[4]; | |
495 | ||
496 | /* This code assumes that "int" is 32 bits and that | |
497 | GET_THREAD_AREA returns no more than 4 int values. */ | |
498 | gdb_assert (sizeof (int) == 4); | |
499 | #ifndef PTRACE_GET_THREAD_AREA | |
500 | #define PTRACE_GET_THREAD_AREA 25 | |
501 | #endif | |
502 | if (ptrace (PTRACE_GET_THREAD_AREA, | |
503 | lwpid, (void *) (long) idx, (unsigned long) &desc) < 0) | |
504 | return PS_ERR; | |
505 | ||
506 | /* Extend the value to 64 bits. Here it's assumed that a "long" | |
507 | and a "void *" are the same. */ | |
508 | (*base) = (void *) (long) desc[1]; | |
509 | return PS_OK; | |
510 | } | |
511 | else | |
512 | { | |
513 | /* This definition comes from prctl.h, but some kernels may not | |
514 | have it. */ | |
c43af07c EZ |
515 | #ifndef PTRACE_ARCH_PRCTL |
516 | #define PTRACE_ARCH_PRCTL 30 | |
517 | #endif | |
50d71875 AC |
518 | /* FIXME: ezannoni-2003-07-09 see comment above about include |
519 | file order. We could be getting bogus values for these two. */ | |
520 | gdb_assert (FS < ELF_NGREG); | |
521 | gdb_assert (GS < ELF_NGREG); | |
522 | switch (idx) | |
523 | { | |
524 | case FS: | |
6fea9e18 L |
525 | #ifdef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE |
526 | { | |
527 | /* PTRACE_ARCH_PRCTL is obsolete since 2.6.25, where the | |
528 | fs_base and gs_base fields of user_regs_struct can be | |
529 | used directly. */ | |
530 | unsigned long fs; | |
531 | errno = 0; | |
532 | fs = ptrace (PTRACE_PEEKUSER, lwpid, | |
533 | offsetof (struct user_regs_struct, fs_base), 0); | |
534 | if (errno == 0) | |
535 | { | |
536 | *base = (void *) fs; | |
537 | return PS_OK; | |
538 | } | |
539 | } | |
540 | #endif | |
50d71875 AC |
541 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) |
542 | return PS_OK; | |
543 | break; | |
544 | case GS: | |
6fea9e18 L |
545 | #ifdef HAVE_STRUCT_USER_REGS_STRUCT_GS_BASE |
546 | { | |
547 | unsigned long gs; | |
548 | errno = 0; | |
549 | gs = ptrace (PTRACE_PEEKUSER, lwpid, | |
550 | offsetof (struct user_regs_struct, gs_base), 0); | |
551 | if (errno == 0) | |
552 | { | |
553 | *base = (void *) gs; | |
554 | return PS_OK; | |
555 | } | |
556 | } | |
557 | #endif | |
50d71875 AC |
558 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) |
559 | return PS_OK; | |
560 | break; | |
561 | default: /* Should not happen. */ | |
562 | return PS_BADADDR; | |
563 | } | |
c43af07c | 564 | } |
b6d42148 | 565 | return PS_ERR; /* ptrace failed. */ |
c43af07c | 566 | } |
5bca7895 | 567 | \f |
c43af07c | 568 | |
10d6c8cd DJ |
569 | static void (*super_post_startup_inferior) (ptid_t ptid); |
570 | ||
571 | static void | |
572 | amd64_linux_child_post_startup_inferior (ptid_t ptid) | |
4056d258 ML |
573 | { |
574 | i386_cleanup_dregs (); | |
10d6c8cd | 575 | super_post_startup_inferior (ptid); |
4056d258 | 576 | } |
60fac5b8 MK |
577 | \f |
578 | ||
5b009018 PA |
579 | /* When GDB is built as a 64-bit application on linux, the |
580 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since | |
581 | debugging a 32-bit inferior with a 64-bit GDB should look the same | |
582 | as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit | |
583 | conversion in-place ourselves. */ | |
584 | ||
585 | /* These types below (compat_*) define a siginfo type that is layout | |
586 | compatible with the siginfo type exported by the 32-bit userspace | |
587 | support. */ | |
588 | ||
589 | typedef int compat_int_t; | |
590 | typedef unsigned int compat_uptr_t; | |
591 | ||
592 | typedef int compat_time_t; | |
593 | typedef int compat_timer_t; | |
594 | typedef int compat_clock_t; | |
595 | ||
596 | struct compat_timeval | |
597 | { | |
598 | compat_time_t tv_sec; | |
599 | int tv_usec; | |
600 | }; | |
601 | ||
602 | typedef union compat_sigval | |
603 | { | |
604 | compat_int_t sival_int; | |
605 | compat_uptr_t sival_ptr; | |
606 | } compat_sigval_t; | |
607 | ||
608 | typedef struct compat_siginfo | |
609 | { | |
610 | int si_signo; | |
611 | int si_errno; | |
612 | int si_code; | |
613 | ||
614 | union | |
615 | { | |
616 | int _pad[((128 / sizeof (int)) - 3)]; | |
617 | ||
618 | /* kill() */ | |
619 | struct | |
620 | { | |
621 | unsigned int _pid; | |
622 | unsigned int _uid; | |
623 | } _kill; | |
624 | ||
625 | /* POSIX.1b timers */ | |
626 | struct | |
627 | { | |
628 | compat_timer_t _tid; | |
629 | int _overrun; | |
630 | compat_sigval_t _sigval; | |
631 | } _timer; | |
632 | ||
633 | /* POSIX.1b signals */ | |
634 | struct | |
635 | { | |
636 | unsigned int _pid; | |
637 | unsigned int _uid; | |
638 | compat_sigval_t _sigval; | |
639 | } _rt; | |
640 | ||
641 | /* SIGCHLD */ | |
642 | struct | |
643 | { | |
644 | unsigned int _pid; | |
645 | unsigned int _uid; | |
646 | int _status; | |
647 | compat_clock_t _utime; | |
648 | compat_clock_t _stime; | |
649 | } _sigchld; | |
650 | ||
651 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ | |
652 | struct | |
653 | { | |
654 | unsigned int _addr; | |
655 | } _sigfault; | |
656 | ||
657 | /* SIGPOLL */ | |
658 | struct | |
659 | { | |
660 | int _band; | |
661 | int _fd; | |
662 | } _sigpoll; | |
663 | } _sifields; | |
664 | } compat_siginfo_t; | |
665 | ||
ba224c70 L |
666 | /* For x32, clock_t in _sigchld is 64bit aligned at 4 bytes. */ |
667 | typedef struct compat_x32_clock | |
668 | { | |
669 | int lower; | |
670 | int upper; | |
671 | } compat_x32_clock_t; | |
672 | ||
673 | typedef struct compat_x32_siginfo | |
674 | { | |
675 | int si_signo; | |
676 | int si_errno; | |
677 | int si_code; | |
678 | ||
679 | union | |
680 | { | |
681 | int _pad[((128 / sizeof (int)) - 3)]; | |
682 | ||
683 | /* kill() */ | |
684 | struct | |
685 | { | |
686 | unsigned int _pid; | |
687 | unsigned int _uid; | |
688 | } _kill; | |
689 | ||
690 | /* POSIX.1b timers */ | |
691 | struct | |
692 | { | |
693 | compat_timer_t _tid; | |
694 | int _overrun; | |
695 | compat_sigval_t _sigval; | |
696 | } _timer; | |
697 | ||
698 | /* POSIX.1b signals */ | |
699 | struct | |
700 | { | |
701 | unsigned int _pid; | |
702 | unsigned int _uid; | |
703 | compat_sigval_t _sigval; | |
704 | } _rt; | |
705 | ||
706 | /* SIGCHLD */ | |
707 | struct | |
708 | { | |
709 | unsigned int _pid; | |
710 | unsigned int _uid; | |
711 | int _status; | |
712 | compat_x32_clock_t _utime; | |
713 | compat_x32_clock_t _stime; | |
714 | } _sigchld; | |
715 | ||
716 | /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ | |
717 | struct | |
718 | { | |
719 | unsigned int _addr; | |
720 | } _sigfault; | |
721 | ||
722 | /* SIGPOLL */ | |
723 | struct | |
724 | { | |
725 | int _band; | |
726 | int _fd; | |
727 | } _sigpoll; | |
728 | } _sifields; | |
729 | } compat_x32_siginfo_t; | |
730 | ||
5b009018 PA |
731 | #define cpt_si_pid _sifields._kill._pid |
732 | #define cpt_si_uid _sifields._kill._uid | |
733 | #define cpt_si_timerid _sifields._timer._tid | |
734 | #define cpt_si_overrun _sifields._timer._overrun | |
735 | #define cpt_si_status _sifields._sigchld._status | |
736 | #define cpt_si_utime _sifields._sigchld._utime | |
737 | #define cpt_si_stime _sifields._sigchld._stime | |
738 | #define cpt_si_ptr _sifields._rt._sigval.sival_ptr | |
739 | #define cpt_si_addr _sifields._sigfault._addr | |
740 | #define cpt_si_band _sifields._sigpoll._band | |
741 | #define cpt_si_fd _sifields._sigpoll._fd | |
742 | ||
14064aa2 DE |
743 | /* glibc at least up to 2.3.2 doesn't have si_timerid, si_overrun. |
744 | In their place is si_timer1,si_timer2. */ | |
745 | #ifndef si_timerid | |
746 | #define si_timerid si_timer1 | |
747 | #endif | |
748 | #ifndef si_overrun | |
749 | #define si_overrun si_timer2 | |
750 | #endif | |
751 | ||
5b009018 PA |
752 | static void |
753 | compat_siginfo_from_siginfo (compat_siginfo_t *to, siginfo_t *from) | |
754 | { | |
755 | memset (to, 0, sizeof (*to)); | |
756 | ||
757 | to->si_signo = from->si_signo; | |
758 | to->si_errno = from->si_errno; | |
759 | to->si_code = from->si_code; | |
760 | ||
b53a1623 | 761 | if (to->si_code == SI_TIMER) |
5b009018 | 762 | { |
b53a1623 PA |
763 | to->cpt_si_timerid = from->si_timerid; |
764 | to->cpt_si_overrun = from->si_overrun; | |
5b009018 PA |
765 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
766 | } | |
767 | else if (to->si_code == SI_USER) | |
768 | { | |
769 | to->cpt_si_pid = from->si_pid; | |
770 | to->cpt_si_uid = from->si_uid; | |
771 | } | |
b53a1623 | 772 | else if (to->si_code < 0) |
5b009018 | 773 | { |
b53a1623 PA |
774 | to->cpt_si_pid = from->si_pid; |
775 | to->cpt_si_uid = from->si_uid; | |
5b009018 PA |
776 | to->cpt_si_ptr = (intptr_t) from->si_ptr; |
777 | } | |
778 | else | |
779 | { | |
780 | switch (to->si_signo) | |
781 | { | |
782 | case SIGCHLD: | |
783 | to->cpt_si_pid = from->si_pid; | |
784 | to->cpt_si_uid = from->si_uid; | |
785 | to->cpt_si_status = from->si_status; | |
786 | to->cpt_si_utime = from->si_utime; | |
787 | to->cpt_si_stime = from->si_stime; | |
788 | break; | |
789 | case SIGILL: | |
790 | case SIGFPE: | |
791 | case SIGSEGV: | |
792 | case SIGBUS: | |
793 | to->cpt_si_addr = (intptr_t) from->si_addr; | |
794 | break; | |
795 | case SIGPOLL: | |
796 | to->cpt_si_band = from->si_band; | |
797 | to->cpt_si_fd = from->si_fd; | |
798 | break; | |
799 | default: | |
800 | to->cpt_si_pid = from->si_pid; | |
801 | to->cpt_si_uid = from->si_uid; | |
802 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
803 | break; | |
804 | } | |
805 | } | |
806 | } | |
807 | ||
808 | static void | |
809 | siginfo_from_compat_siginfo (siginfo_t *to, compat_siginfo_t *from) | |
810 | { | |
811 | memset (to, 0, sizeof (*to)); | |
812 | ||
813 | to->si_signo = from->si_signo; | |
814 | to->si_errno = from->si_errno; | |
815 | to->si_code = from->si_code; | |
816 | ||
b53a1623 | 817 | if (to->si_code == SI_TIMER) |
5b009018 | 818 | { |
b53a1623 PA |
819 | to->si_timerid = from->cpt_si_timerid; |
820 | to->si_overrun = from->cpt_si_overrun; | |
5b009018 PA |
821 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; |
822 | } | |
823 | else if (to->si_code == SI_USER) | |
824 | { | |
825 | to->si_pid = from->cpt_si_pid; | |
826 | to->si_uid = from->cpt_si_uid; | |
827 | } | |
b53a1623 | 828 | if (to->si_code < 0) |
5b009018 | 829 | { |
b53a1623 PA |
830 | to->si_pid = from->cpt_si_pid; |
831 | to->si_uid = from->cpt_si_uid; | |
5b009018 PA |
832 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; |
833 | } | |
834 | else | |
835 | { | |
836 | switch (to->si_signo) | |
837 | { | |
838 | case SIGCHLD: | |
839 | to->si_pid = from->cpt_si_pid; | |
840 | to->si_uid = from->cpt_si_uid; | |
841 | to->si_status = from->cpt_si_status; | |
842 | to->si_utime = from->cpt_si_utime; | |
843 | to->si_stime = from->cpt_si_stime; | |
844 | break; | |
845 | case SIGILL: | |
846 | case SIGFPE: | |
847 | case SIGSEGV: | |
848 | case SIGBUS: | |
849 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; | |
850 | break; | |
851 | case SIGPOLL: | |
852 | to->si_band = from->cpt_si_band; | |
853 | to->si_fd = from->cpt_si_fd; | |
854 | break; | |
855 | default: | |
856 | to->si_pid = from->cpt_si_pid; | |
857 | to->si_uid = from->cpt_si_uid; | |
858 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; | |
859 | break; | |
860 | } | |
861 | } | |
862 | } | |
863 | ||
ba224c70 L |
864 | static void |
865 | compat_x32_siginfo_from_siginfo (compat_x32_siginfo_t *to, | |
866 | siginfo_t *from) | |
867 | { | |
868 | memset (to, 0, sizeof (*to)); | |
869 | ||
870 | to->si_signo = from->si_signo; | |
871 | to->si_errno = from->si_errno; | |
872 | to->si_code = from->si_code; | |
873 | ||
874 | if (to->si_code == SI_TIMER) | |
875 | { | |
876 | to->cpt_si_timerid = from->si_timerid; | |
877 | to->cpt_si_overrun = from->si_overrun; | |
878 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
879 | } | |
880 | else if (to->si_code == SI_USER) | |
881 | { | |
882 | to->cpt_si_pid = from->si_pid; | |
883 | to->cpt_si_uid = from->si_uid; | |
884 | } | |
885 | else if (to->si_code < 0) | |
886 | { | |
887 | to->cpt_si_pid = from->si_pid; | |
888 | to->cpt_si_uid = from->si_uid; | |
889 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
890 | } | |
891 | else | |
892 | { | |
893 | switch (to->si_signo) | |
894 | { | |
895 | case SIGCHLD: | |
896 | to->cpt_si_pid = from->si_pid; | |
897 | to->cpt_si_uid = from->si_uid; | |
898 | to->cpt_si_status = from->si_status; | |
899 | memcpy (&to->cpt_si_utime, &from->si_utime, | |
900 | sizeof (to->cpt_si_utime)); | |
901 | memcpy (&to->cpt_si_stime, &from->si_stime, | |
902 | sizeof (to->cpt_si_stime)); | |
903 | break; | |
904 | case SIGILL: | |
905 | case SIGFPE: | |
906 | case SIGSEGV: | |
907 | case SIGBUS: | |
908 | to->cpt_si_addr = (intptr_t) from->si_addr; | |
909 | break; | |
910 | case SIGPOLL: | |
911 | to->cpt_si_band = from->si_band; | |
912 | to->cpt_si_fd = from->si_fd; | |
913 | break; | |
914 | default: | |
915 | to->cpt_si_pid = from->si_pid; | |
916 | to->cpt_si_uid = from->si_uid; | |
917 | to->cpt_si_ptr = (intptr_t) from->si_ptr; | |
918 | break; | |
919 | } | |
920 | } | |
921 | } | |
922 | ||
923 | static void | |
924 | siginfo_from_compat_x32_siginfo (siginfo_t *to, | |
925 | compat_x32_siginfo_t *from) | |
926 | { | |
927 | memset (to, 0, sizeof (*to)); | |
928 | ||
929 | to->si_signo = from->si_signo; | |
930 | to->si_errno = from->si_errno; | |
931 | to->si_code = from->si_code; | |
932 | ||
933 | if (to->si_code == SI_TIMER) | |
934 | { | |
935 | to->si_timerid = from->cpt_si_timerid; | |
936 | to->si_overrun = from->cpt_si_overrun; | |
937 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
938 | } | |
939 | else if (to->si_code == SI_USER) | |
940 | { | |
941 | to->si_pid = from->cpt_si_pid; | |
942 | to->si_uid = from->cpt_si_uid; | |
943 | } | |
944 | if (to->si_code < 0) | |
945 | { | |
946 | to->si_pid = from->cpt_si_pid; | |
947 | to->si_uid = from->cpt_si_uid; | |
948 | to->si_ptr = (void *) (intptr_t) from->cpt_si_ptr; | |
949 | } | |
950 | else | |
951 | { | |
952 | switch (to->si_signo) | |
953 | { | |
954 | case SIGCHLD: | |
955 | to->si_pid = from->cpt_si_pid; | |
956 | to->si_uid = from->cpt_si_uid; | |
957 | to->si_status = from->cpt_si_status; | |
958 | memcpy (&to->si_utime, &from->cpt_si_utime, | |
959 | sizeof (to->si_utime)); | |
960 | memcpy (&to->si_stime, &from->cpt_si_stime, | |
961 | sizeof (to->si_stime)); | |
962 | break; | |
963 | case SIGILL: | |
964 | case SIGFPE: | |
965 | case SIGSEGV: | |
966 | case SIGBUS: | |
967 | to->si_addr = (void *) (intptr_t) from->cpt_si_addr; | |
968 | break; | |
969 | case SIGPOLL: | |
970 | to->si_band = from->cpt_si_band; | |
971 | to->si_fd = from->cpt_si_fd; | |
972 | break; | |
973 | default: | |
974 | to->si_pid = from->cpt_si_pid; | |
975 | to->si_uid = from->cpt_si_uid; | |
976 | to->si_ptr = (void* ) (intptr_t) from->cpt_si_ptr; | |
977 | break; | |
978 | } | |
979 | } | |
980 | } | |
981 | ||
5b009018 PA |
982 | /* Convert a native/host siginfo object, into/from the siginfo in the |
983 | layout of the inferiors' architecture. Returns true if any | |
984 | conversion was done; false otherwise. If DIRECTION is 1, then copy | |
985 | from INF to NATIVE. If DIRECTION is 0, copy from NATIVE to | |
986 | INF. */ | |
987 | ||
988 | static int | |
a5362b9a | 989 | amd64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction) |
5b009018 | 990 | { |
ba224c70 L |
991 | struct gdbarch *gdbarch = get_frame_arch (get_current_frame ()); |
992 | ||
5b009018 PA |
993 | /* Is the inferior 32-bit? If so, then do fixup the siginfo |
994 | object. */ | |
ba224c70 | 995 | if (gdbarch_bfd_arch_info (gdbarch)->bits_per_word == 32) |
5b009018 | 996 | { |
a5362b9a | 997 | gdb_assert (sizeof (siginfo_t) == sizeof (compat_siginfo_t)); |
5b009018 PA |
998 | |
999 | if (direction == 0) | |
1000 | compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, native); | |
1001 | else | |
1002 | siginfo_from_compat_siginfo (native, (struct compat_siginfo *) inf); | |
1003 | ||
ba224c70 L |
1004 | return 1; |
1005 | } | |
1006 | /* No fixup for native x32 GDB. */ | |
1007 | else if (gdbarch_addr_bit (gdbarch) == 32 && sizeof (void *) == 8) | |
1008 | { | |
1009 | gdb_assert (sizeof (siginfo_t) == sizeof (compat_x32_siginfo_t)); | |
1010 | ||
1011 | if (direction == 0) | |
1012 | compat_x32_siginfo_from_siginfo ((struct compat_x32_siginfo *) inf, | |
1013 | native); | |
1014 | else | |
1015 | siginfo_from_compat_x32_siginfo (native, | |
1016 | (struct compat_x32_siginfo *) inf); | |
1017 | ||
5b009018 PA |
1018 | return 1; |
1019 | } | |
1020 | else | |
1021 | return 0; | |
1022 | } | |
1023 | ||
90884b2b L |
1024 | /* Get Linux/x86 target description from running target. |
1025 | ||
1026 | Value of CS segment register: | |
1027 | 1. 64bit process: 0x33. | |
1028 | 2. 32bit process: 0x23. | |
6da38f42 L |
1029 | |
1030 | Value of DS segment register: | |
1031 | 1. LP64 process: 0x0. | |
1032 | 2. X32 process: 0x2b. | |
90884b2b L |
1033 | */ |
1034 | ||
1035 | #define AMD64_LINUX_USER64_CS 0x33 | |
6da38f42 | 1036 | #define AMD64_LINUX_X32_DS 0x2b |
90884b2b L |
1037 | |
1038 | static const struct target_desc * | |
1039 | amd64_linux_read_description (struct target_ops *ops) | |
1040 | { | |
1041 | unsigned long cs; | |
6da38f42 | 1042 | unsigned long ds; |
90884b2b | 1043 | int tid; |
a055a187 | 1044 | int is_64bit; |
6da38f42 | 1045 | int is_x32; |
a055a187 | 1046 | static uint64_t xcr0; |
90884b2b L |
1047 | |
1048 | /* GNU/Linux LWP ID's are process ID's. */ | |
1049 | tid = TIDGET (inferior_ptid); | |
1050 | if (tid == 0) | |
1051 | tid = PIDGET (inferior_ptid); /* Not a threaded program. */ | |
1052 | ||
1053 | /* Get CS register. */ | |
1054 | errno = 0; | |
1055 | cs = ptrace (PTRACE_PEEKUSER, tid, | |
1056 | offsetof (struct user_regs_struct, cs), 0); | |
1057 | if (errno != 0) | |
1058 | perror_with_name (_("Couldn't get CS register")); | |
1059 | ||
a055a187 L |
1060 | is_64bit = cs == AMD64_LINUX_USER64_CS; |
1061 | ||
6da38f42 L |
1062 | /* Get DS register. */ |
1063 | errno = 0; | |
1064 | ds = ptrace (PTRACE_PEEKUSER, tid, | |
1065 | offsetof (struct user_regs_struct, ds), 0); | |
1066 | if (errno != 0) | |
1067 | perror_with_name (_("Couldn't get DS register")); | |
1068 | ||
1069 | is_x32 = ds == AMD64_LINUX_X32_DS; | |
1070 | ||
1071 | if (sizeof (void *) == 4 && is_64bit && !is_x32) | |
1072 | error (_("Can't debug 64-bit process with 32-bit GDB")); | |
1073 | ||
a055a187 L |
1074 | if (have_ptrace_getregset == -1) |
1075 | { | |
1076 | uint64_t xstateregs[(I386_XSTATE_SSE_SIZE / sizeof (uint64_t))]; | |
1077 | struct iovec iov; | |
1078 | ||
1079 | iov.iov_base = xstateregs; | |
1080 | iov.iov_len = sizeof (xstateregs); | |
1081 | ||
1082 | /* Check if PTRACE_GETREGSET works. */ | |
1083 | if (ptrace (PTRACE_GETREGSET, tid, | |
1084 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
1085 | have_ptrace_getregset = 0; | |
1086 | else | |
1087 | { | |
1088 | have_ptrace_getregset = 1; | |
1089 | ||
1090 | /* Get XCR0 from XSAVE extended state. */ | |
1091 | xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET | |
1092 | / sizeof (uint64_t))]; | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | /* Check the native XCR0 only if PTRACE_GETREGSET is available. */ | |
1097 | if (have_ptrace_getregset | |
1098 | && (xcr0 & I386_XSTATE_AVX_MASK) == I386_XSTATE_AVX_MASK) | |
1099 | { | |
1100 | if (is_64bit) | |
6da38f42 L |
1101 | { |
1102 | if (is_x32) | |
1103 | return tdesc_x32_avx_linux; | |
1104 | else | |
1105 | return tdesc_amd64_avx_linux; | |
1106 | } | |
a055a187 L |
1107 | else |
1108 | return tdesc_i386_avx_linux; | |
1109 | } | |
90884b2b | 1110 | else |
a055a187 L |
1111 | { |
1112 | if (is_64bit) | |
6da38f42 L |
1113 | { |
1114 | if (is_x32) | |
1115 | return tdesc_x32_linux; | |
1116 | else | |
1117 | return tdesc_amd64_linux; | |
1118 | } | |
a055a187 L |
1119 | else |
1120 | return tdesc_i386_linux; | |
1121 | } | |
90884b2b L |
1122 | } |
1123 | ||
3e3aea48 MM |
1124 | /* Enable branch tracing. */ |
1125 | ||
1126 | static struct btrace_target_info * | |
1127 | amd64_linux_enable_btrace (ptid_t ptid) | |
1128 | { | |
1129 | struct btrace_target_info *tinfo; | |
1130 | struct gdbarch *gdbarch; | |
1131 | ||
1132 | errno = 0; | |
1133 | tinfo = linux_enable_btrace (ptid); | |
1134 | ||
1135 | if (tinfo == NULL) | |
1136 | error (_("Could not enable branch tracing for %s: %s."), | |
1137 | target_pid_to_str (ptid), safe_strerror (errno)); | |
1138 | ||
1139 | /* Fill in the size of a pointer in bits. */ | |
1140 | gdbarch = target_thread_architecture (ptid); | |
1141 | tinfo->ptr_bits = gdbarch_ptr_bit (gdbarch); | |
1142 | ||
1143 | return tinfo; | |
1144 | } | |
1145 | ||
1146 | /* Disable branch tracing. */ | |
1147 | ||
1148 | static void | |
1149 | amd64_linux_disable_btrace (struct btrace_target_info *tinfo) | |
1150 | { | |
1151 | int errcode = linux_disable_btrace (tinfo); | |
1152 | ||
1153 | if (errcode != 0) | |
1154 | error (_("Could not disable branch tracing: %s."), safe_strerror (errcode)); | |
1155 | } | |
1156 | ||
1157 | /* Teardown branch tracing. */ | |
1158 | ||
1159 | static void | |
1160 | amd64_linux_teardown_btrace (struct btrace_target_info *tinfo) | |
1161 | { | |
1162 | /* Ignore errors. */ | |
1163 | linux_disable_btrace (tinfo); | |
1164 | } | |
1165 | ||
60fac5b8 | 1166 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
430eaf2e | 1167 | void _initialize_amd64_linux_nat (void); |
60fac5b8 MK |
1168 | |
1169 | void | |
430eaf2e | 1170 | _initialize_amd64_linux_nat (void) |
60fac5b8 | 1171 | { |
10d6c8cd DJ |
1172 | struct target_ops *t; |
1173 | ||
430eaf2e | 1174 | amd64_native_gregset32_reg_offset = amd64_linux_gregset32_reg_offset; |
60fac5b8 | 1175 | amd64_native_gregset32_num_regs = I386_LINUX_NUM_REGS; |
6cd6a2ae | 1176 | amd64_native_gregset64_reg_offset = amd64_linux_gregset_reg_offset; |
8695c747 | 1177 | amd64_native_gregset64_num_regs = AMD64_LINUX_NUM_REGS; |
60fac5b8 | 1178 | |
430eaf2e | 1179 | gdb_assert (ARRAY_SIZE (amd64_linux_gregset32_reg_offset) |
60fac5b8 | 1180 | == amd64_native_gregset32_num_regs); |
10d6c8cd DJ |
1181 | |
1182 | /* Fill in the generic GNU/Linux methods. */ | |
1183 | t = linux_target (); | |
1184 | ||
c03374d5 DJ |
1185 | i386_use_watchpoints (t); |
1186 | ||
9bb9e8ad PM |
1187 | i386_dr_low.set_control = amd64_linux_dr_set_control; |
1188 | i386_dr_low.set_addr = amd64_linux_dr_set_addr; | |
7b50312a | 1189 | i386_dr_low.get_addr = amd64_linux_dr_get_addr; |
9bb9e8ad | 1190 | i386_dr_low.get_status = amd64_linux_dr_get_status; |
7b50312a | 1191 | i386_dr_low.get_control = amd64_linux_dr_get_control; |
9bb9e8ad PM |
1192 | i386_set_debug_register_length (8); |
1193 | ||
10d6c8cd DJ |
1194 | /* Override the GNU/Linux inferior startup hook. */ |
1195 | super_post_startup_inferior = t->to_post_startup_inferior; | |
1196 | t->to_post_startup_inferior = amd64_linux_child_post_startup_inferior; | |
1197 | ||
1198 | /* Add our register access methods. */ | |
1199 | t->to_fetch_registers = amd64_linux_fetch_inferior_registers; | |
1200 | t->to_store_registers = amd64_linux_store_inferior_registers; | |
1201 | ||
90884b2b L |
1202 | t->to_read_description = amd64_linux_read_description; |
1203 | ||
3e3aea48 MM |
1204 | /* Add btrace methods. */ |
1205 | t->to_supports_btrace = linux_supports_btrace; | |
1206 | t->to_enable_btrace = amd64_linux_enable_btrace; | |
1207 | t->to_disable_btrace = amd64_linux_disable_btrace; | |
1208 | t->to_teardown_btrace = amd64_linux_teardown_btrace; | |
1209 | t->to_read_btrace = linux_read_btrace; | |
1210 | ||
10d6c8cd | 1211 | /* Register the target. */ |
f973ed9c | 1212 | linux_nat_add_target (t); |
9f0bdab8 | 1213 | linux_nat_set_new_thread (t, amd64_linux_new_thread); |
26cb8b7c PA |
1214 | linux_nat_set_new_fork (t, amd64_linux_new_fork); |
1215 | linux_nat_set_forget_process (t, i386_forget_process); | |
5b009018 | 1216 | linux_nat_set_siginfo_fixup (t, amd64_linux_siginfo_fixup); |
7b50312a | 1217 | linux_nat_set_prepare_to_resume (t, amd64_linux_prepare_to_resume); |
60fac5b8 | 1218 | } |